CN108161122B - Manufacturing process of metal ceramic cold saw circular saw blade - Google Patents
Manufacturing process of metal ceramic cold saw circular saw blade Download PDFInfo
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- CN108161122B CN108161122B CN201810107596.3A CN201810107596A CN108161122B CN 108161122 B CN108161122 B CN 108161122B CN 201810107596 A CN201810107596 A CN 201810107596A CN 108161122 B CN108161122 B CN 108161122B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 14
- 239000000919 ceramic Substances 0.000 title claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 36
- 238000003466 welding Methods 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 239000011195 cermet Substances 0.000 claims description 10
- 238000005422 blasting Methods 0.000 claims description 7
- 238000005488 sandblasting Methods 0.000 claims description 7
- 238000012795 verification Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention provides a manufacturing process of a metal ceramic cold saw circular saw blade, which comprises the following steps: A. cutting the plate to obtain a circular sheet body with a plurality of circumferentially distributed tooth grooves on the periphery; B. the stress of the sheet body can meet the requirement; C. the flatness of the sheet body meets the requirement; D. after the blade is positioned in the tooth slot of the blade body and the symmetry degree of the blade relative to the blade body meets the requirement, welding the blade on the blade body by adopting double laser beams; E. manually leveling the sheet body; F. sequentially carrying out rough grinding and fine grinding on the blade; G. the invention can improve efficiency and yield, shorten inspection and leveling working hours, reduce manufacturing cost and break through the production bottleneck of the circular saw blade of the cold saw.
Description
Technical Field
The invention relates to a manufacturing process of a metal ceramic cold saw circular saw blade.
Background
The conventional "hot saw" circular saw blade cuts metal just as a woodworking circular saw blade processes wood, and friction between the saw teeth and the material to be cut is severe, and a large amount of heat is generated during the cutting process. Unlike the hot saw described above, cold saw machining produces a "cold saw" cutting effect due to the different cutting principles. Compared with the traditional hot saw blade milling cutter with the traditional high-speed steel and hard alloy as cutter materials, the cold saw blade milling cutter has good saw cutting section quality and high sizing precision. Therefore, it has found application in the production of new profiles and will find more widespread use in the processing of metallic materials. The working temperature of the cold sawing machine is generally kept at 40-50 ℃, the processed workpiece cannot change materials due to high temperature generated by friction, the cooling effect is not good, the saw blade generates distortion and denaturation under the action of external force and thermal stress, and the section quality of the workpiece is affected; because the cold sawing machine has high automation degree, low fatigue degree of operators, high sawing efficiency, low noise, no spark, lower cold sawing cost (the cost of cold sawing per ton of steel is about 6.5 yuan, and the cost of hot sawing per ton of steel is about 30 yuan) and smaller dust, the requirements of energy conservation and environmental protection in China are met. However, the requirements on cold saw process conditions are high, the manufacturing cost is high, the inspection and leveling time is long, the yield is low, and the production bottleneck of the high-efficiency high-quality metal ceramic cold saw circular saw blade is formed.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a manufacturing process of a metal ceramic cold saw circular saw blade, which can improve efficiency and yield, shorten inspection and leveling working hours, reduce manufacturing cost and break through the production bottleneck of the cold saw circular saw blade.
The invention is realized by the following technical scheme:
A manufacturing process of a metal ceramic cold saw circular saw blade comprises a circular blade body and a blade arranged on the blade body, wherein the blade is made of metal ceramic, and the manufacturing process comprises the following steps:
A. Cutting the plate to obtain a circular sheet body with a plurality of circumferentially distributed tooth grooves at the periphery, wherein a positioning hole in the center and a plurality of transmission holes circumferentially distributed around the positioning hole are formed in the sheet body;
B. Detecting stress of the sheet body after shot blasting or sand blasting treatment is carried out on the sheet body, and controlling granularity and speed of the shot blasting or sand blasting according to a detection result so that the stress of the sheet body meets the requirement of less than or equal to 0.2 mm;
C. the sheet body is comprehensively rolled to enable the sheet body to be leveled to a certain extent, then the flatness of the sheet body is detected, and the sheet body is sequentially graded and leveled according to the detection result, so that the flatness of the sheet body meets the requirement of less than or equal to 0.03 mm;
D. Positioning the blade into a tooth slot of the sheet body, and welding the blade on the sheet body by adopting double laser beams after the symmetry degree of the blade relative to the sheet body meets the requirement of less than or equal to +/-0.0025 mm;
E. Manually flattening the sheet to reduce and eliminate internal stress and deformation caused by welding;
F. Sequentially carrying out rough grinding and fine grinding on the blade;
G. The front end of each blade is provided with a chip dividing groove, and the chip dividing grooves on two adjacent blades are arranged on two sides of the symmetry line of the blade in a staggered and symmetrical way.
Further, the step B detects the stress of the sheet body by using a first detection device, the first detection device comprises a base, a positioning device arranged on the base for positioning the sheet body, a force application device capable of applying a force perpendicular to the sheet body on one side of the sheet body and a dial indicator arranged on the other side of the sheet body and close to the edge of the sheet body for detecting the stress of the sheet body, the positioning device comprises a first fixing chuck for clamping the sheet body, a first micro taper mandrel penetrating through the first fixing chuck and a sheet body positioning hole, and a first precise bearing arranged between the base and the first fixing chuck, and the positioning device is combined with the surface A of the sheet body as a positioning surface through the positioning hole to realize five-point positioning.
Further, in the step C, the sheet body is rolled comprehensively and leveled by using a leveling device, the leveling device includes a frame, an indexing turntable which is horizontally rotatably arranged on the frame, a workbench which is arranged on the indexing turntable to place the sheet body, and a roller which is arranged above the workbench and is arranged on the frame in a liftable manner.
Further, in the step C, the flatness of the sheet body after the full rolling is detected by using a second detection device, the second detection device includes a projection detection device for accurately measuring the flatness of the sheet body and a verification device for verifying the detection result of the projection detection device, the projection detection device includes a second fixed chuck and a movable chuck which are arranged at intervals to clamp the sheet body, a second micro taper mandrel passing through the second fixed chuck and the sheet body, a pushing mechanism with an end part arranged on the movable chuck to push the movable chuck to axially move along the sheet body, and a light source and a projection curtain which are arranged at two radial ends of the sheet body at intervals relatively, and the verification device includes a cutting edge type ruler and a feeler gauge.
Further, in the step D, the blade is positioned to the tooth slot of the sheet body by using a symmetrical positioning device, and the symmetry degree of the blade relative to the sheet body meets the requirement, the symmetrical positioning device comprises two pressing plates which are symmetrically arranged at intervals and can rotate, two cams which can be synchronously and rotationally arranged at the outer sides of the upper parts of the two pressing plates, and two reset springs which are respectively arranged at the outer sides of the lower parts of the two pressing plates, the blade is arranged in the tooth slot, the two cams relatively rotate to enable the two pressing plates to relatively rotate and press the blade, and when the two side forces of the blade are unbalanced, the cam action pushes the blade to move leftwards or rightwards, and the reset springs are used for enabling the two pressing plates to be in the open position.
Further, the step F includes the following steps:
f1, positioning the sheet body by combining the positioning holes with the surface A of the sheet body as a positioning surface;
f2, randomly trial grinding cutter teeth of three blades, wherein when the end face circle runout tolerance of the trial-ground cutter teeth meets the following conditions: after delta end is less than or equal to 0.005+0.0.+1/2 delta t, the cutter teeth of all the blades can be subjected to rough grinding according to the same rough grinding specification, wherein delta t is the width tolerance of the blades;
and F3, semi-finish grinding and finish grinding the roughly-ground blade by using a full-automatic numerical control gear grinding machine.
Further, in the step G, a chip breaker is formed at the front end of each blade by using a chip breaker device, the chip breaker device includes a stepper motor, a chip breaker grinding wheel driven by the stepper motor, and a screw-nut pair disposed between the stepper motor and the chip breaker grinding wheel, the screw-nut pair includes a large diameter screw and a small lead nut, wherein a ratio k=d 3/L of the outer diameter d 3 of the screw to the lead L of the nut is greater than or equal to 20.
Further, the tool bit is made of cermet added with WC, mo2C, nbC, taC, co and Ni and the plate comprises 8CrV or 8CrNi2.
Further, in the step E, the manual leveling is performed by means of local hammering.
And C, before the step, positioning the sheet body by taking the positioning hole and the A surface of the sheet body as positioning surfaces, and finely reaming the positioning hole and the transmission hole through a reamer.
The invention has the following beneficial effects:
1. According to the invention, the granularity and the speed of shot blasting or sand blasting are controlled according to the stress detection result, the flatness of the sheet body is detected after the sheet body is fully rolled, and the sheet body is sequentially graded and leveled according to the detection result, so that the flatness and the rigidity of the sheet body are ensured, the blades are positioned in tooth grooves of the sheet body, the symmetry degree of the blades relative to the sheet body meets the requirements, the blades are welded on the sheet body by adopting double-beam lasers, the welding quality and the welding efficiency are improved, the chip dividing grooves at the front ends of two adjacent blades are staggered and symmetrically arranged at two sides of the symmetrical line of the blades, and the circular saw blade has better and faster cutting capability.
2. The positioning device provided by the invention has the advantages that the first fixed chuck and the first micro-taper mandrel are used as positioning elements, the positioning holes and the surface A of the sheet body are used as positioning surfaces for combination, five-point positioning is realized, the operation is convenient, the positioning precision is high, and in the whole process, the uniform positioning surfaces are used for combination positioning, so that the high precision of the size and the shape and the position of the circular saw blade is ensured, the first precision bearing enables the dial indicator to measure the stress of different measuring points of the sheet body, and the stress detection accuracy is higher.
3. The two pressing plates, the two cams and the two return springs of the symmetrical device are symmetrically arranged, so that when the blade is positioned to the tooth slot of the sheet body, the blade can be conveniently and rapidly arranged at the symmetrical position relative to the sheet body, the symmetry degree of the blade is ensured, the laser welding and the rough grinding of the blade are convenient, and the production efficiency of the whole process is improved.
Drawings
The invention is described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a circular saw blade of a cermet cold saw.
Fig. 2 is a flow chart of the present invention.
Fig. 3 is a schematic structural diagram of the first detection device.
Fig. 4 is a schematic structural view of the positioning device.
Fig. 5 is a schematic structural view of the leveling device.
Fig. 6 is a schematic structural diagram of the second detection device.
Fig. 7 is a schematic projection view of a tablet.
Fig. 8 is a schematic structural view of the symmetrical positioning device.
Fig. 9 is a schematic structural view of the chip breaker device.
Fig. 10 is a schematic cross-sectional view of adjacent cutter teeth formed on a workpiece, respectively.
Detailed Description
As shown in fig. 1 to 10, the circular saw blade of the metal ceramic cold saw comprises a circular blade body 1 and a blade 2 arranged on the blade body 1, wherein the blade 2 is made of metal ceramic added with WC, mo2C, nbC, taC, co and Ni by Ti (C, N), the blade body 1 is made of an 8CrV or 8CrNi2 plate, and in the material selection process of the plate, the magnetic flaw detection test is adopted to ensure that the plate is high-quality and flaw-free, and the hardness test is required to be carried out on the blade body 1.
The manufacturing process of the metal ceramic cold saw circular saw blade comprises the following steps:
A. Cutting a plate by adopting a high-precision numerical control laser cutting machine to obtain a circular plate body 1 with a plurality of circumferentially distributed tooth grooves 11 at the periphery, wherein a positioning hole 12 positioned at the center and four transmission holes 13 circumferentially distributed around the positioning hole 12 are formed in the plate body 1, the distance from the top end of a blade 2 to the circle center of the plate body 1 is defined as the outer circle diameter phi Outer circle of the plate body 1, the distance from the bottom end of the tooth groove 11 to the circle center of the plate body 1 is defined as the tooth groove bottom circle diameter phi Bottom circle , the outer circle diameter of the plate body 1 is phi Outer circle = (460+/-0.8) mm, the tooth groove bottom circle diameter is phi Bottom circle = (460-z+/-0.8) mm, wherein z is the length of the blade 2, and the indexing position precision of the tooth groove 11 is less than or equal to 15';
B. After shot blasting or sand blasting is carried out on the cut sheet body 1, the stress of the sheet body 1 is detected by using a first detection device 3, and the granularity and the speed of the shot blasting or sand blasting are controlled according to the detection result so that the stress of the sheet body meets the requirement, and particularly the stress is less than or equal to 0.2mm;
The first detection device 3 comprises a base 31, a positioning device 32 arranged on the base 31 to position the sheet body 1, a force application device 33 capable of applying a force perpendicular to the sheet body 1 to the left side of the sheet body 1 and a dial indicator 34 arranged on the right side of the sheet body 1 near the edge of the sheet body 1 to detect the stress of the sheet body 1, wherein the force application device 33 can adopt a miniature hydraulic jack, the positioning device 32 comprises a first fixing chuck 35 for clamping the sheet body 1, a first micro taper mandrel 36 passing through the first fixing chuck 35 and a positioning hole 12 of the sheet body 1, and a first precise bearing 37 arranged between the base 31 and the first fixing chuck 35, and the positioning device 32 is combined with an A face (an A face shown as the first fixing chuck 35 in fig. 3, namely an A face of the sheet body 1) of the sheet body 1 as a positioning face to realize five-point positioning;
the point where the dial indicator 34 contacts the sheet 1 is a measurement point, and the sheet 1 is rotated to enable the dial indicator 34 to measure different measurement points, in this embodiment, the number of measurement points should be not less than 10;
in order to ensure the positioning accuracy, the shape and position errors of the first fixing chuck 35 and the first micro taper mandrel 36 are higher than those of the prior art, specifically: the flatness of the first fixed chuck 35 was 0.001, and the perpendicularity of the first micro-tapered mandrel 36 was 0.002;
C. positioning the sheet body 1 by taking the positioning hole 12 and the A surface of the sheet body 1 as positioning surfaces, and finely reaming the positioning hole 12 and the transmission hole 13 through a reamer;
D. After the sheet body 1 is fully rolled by the leveling device 4 to enable the sheet body 1 to be leveled to a certain extent, detecting the flatness of the sheet body 1 by the second detection device, and sequentially dividing and leveling the sheet body 1 by the leveling device 4 according to the detection result so as to enable the flatness of the sheet body 1 to meet the requirement, wherein the specific requirement is that the flatness of two sides of the sheet body 1 is less than or equal to 0.03mm;
The leveling device 4 comprises a frame, an indexing turntable 42 which is arranged on the frame in a horizontal rotating way, a workbench 43 which is arranged on the indexing turntable 42 and used for placing the sheet body 1, a second stepping motor 44 which drives the workbench 43 to rotate, a roller 45 which is arranged above the workbench 43 and is arranged on the frame in a lifting way through a lifting mechanism, and a third stepping motor 46 which drives the roller 45 to rotate, wherein the frame comprises two upright posts 411 which are arranged at intervals and a cross beam 412 which is arranged between the top ends of the two upright posts 411, the lifting mechanism comprises a door-shaped press frame 471, a linear guide rail pair 472 which is arranged between two sides of the press frame 471 and the two upright posts 411, a hydraulic cylinder 473 which is arranged above the cross beam 412, a hydraulic rod 474 which is arranged between the hydraulic cylinder 473 and the press frame 471, and the roller 45 can be arranged on the press frame 471 in a rotating way through a bearing 475;
The second detection device comprises a projection detection device 51 for accurately measuring the flatness of the sheet body 1 and a verification device for verifying the detection result of the projection detection device 51, wherein the projection detection device 51 comprises a second fixed chuck 52 and a movable chuck 53 which are arranged at intervals to clamp the sheet body 1, a second micro taper mandrel 54 penetrating through the second fixed chuck 52 and the sheet body 1, a pushing mechanism of which the end part is arranged on the movable chuck 53 to push the movable chuck 53 to move along the axial direction of the sheet body 1, a light source 55 and a projection screen 56 which are arranged at the two radial ends of the sheet body 1 at intervals oppositely, and the verification device comprises a cutting edge type ruler and a feeler; the pushing mechanism comprises a hydraulic system 541, an oil cylinder 542 arranged on the hydraulic system 541, and a pushing head 543 arranged at the output end of the oil cylinder 542, and the movable chuck 53 is arranged on the pushing head 543;
In the first stage, the workbench 43 continuously rotates, the roller 45 continuously moves, the hydraulic cylinder 473 applies force to enable the roller 45 to realize comprehensive rolling relative to the sheet body 1, so that the sheet body 1 is leveled to a certain extent, and a certain amount of surface compressive stress is uniformly obtained on the surface layer of the sheet body;
The flatness of the sheet 1 is detected by the projection detection device 51, the sheet 1 is positioned according to the positioning hole 12 and the sheet A surface combined positioning method, five degrees of freedom are limited, projection surfaces with not less than three different directions are taken, as shown in fig. 7, the maximum value delta of the projection profile relative to the irregularity of the ideal plane 0 is the measured flatness, and then the flatness of the sheet 1 is verified and detected by the cutting edge type ruler and the feeler gauge, wherein the detection method comprises the following steps: on the distribution measurement of more than three over centers on two planes of the sheet body 1 respectively using a cutting edge type ruler, the maximum value of the thickness of the feeler gauge is the flatness, when the error between the flatness detected by verification and the flatness detected by the projection detection device 51 is in the allowable range, the flatness detected by the projection detection device 51 is determined to be the flatness of the sheet body 1, otherwise, the flatness needs to be projected and measured again;
And a second stage, namely sequentially leveling the positions distributed on the angle of 120 degrees according to marks by taking the detected flatness as a basic basis: the hydraulic rod 474 of the hydraulic cylinder 473 moves downwards along the linear guide rail pair 472 under the action of working oil to drive the second stepping motor 44 and the roller 45 to press the sheet body 1 and keep the sheet body 1 for a period of time, then the roller 45 is separated from the sheet body 1 to a certain safety height, the indexing turntable 42 rotates to enable the workbench to rotate for 120 degrees, the roller 45 is pressed downwards again to level the sheet body 1 in another 120-degree direction, and the process is repeated to obtain leveling in another 120-degree direction;
In the working process, the roller 45 continuously rotates at a low speed under the drive of the third stepping motor 46, so that the sheet body 1 is ensured to be uniformly acted on the surface of the roller 45;
E. After the blade 2 is positioned into the tooth groove 11 of the sheet body 1 by utilizing the symmetrical positioning device 6 and the symmetry degree of the blade 2 relative to the sheet body 1 meets the requirement, the blade 2 is welded on the sheet body 1 by adopting double laser beams, wherein the symmetry degree is less than or equal to +/-0.0025 mm;
the symmetrical positioning device 6 comprises two pressing plates 61 which are symmetrically arranged at intervals and can rotate, two cams 62 which can be synchronously and rotatably arranged at the outer sides of the upper parts of the two pressing plates 61 and two return springs 63 which are respectively arranged at the outer sides of the lower parts of the two pressing plates 61, when the symmetrical positioning device is positioned, the two pressing plates 61 are positioned at the open position by the return springs 63, the blade 2 is arranged in the tooth slot 11, the two cams 62 relatively rotate to enable the two pressing plates 61 to relatively rotate and press the two side surfaces of the blade 2, and when the forces of the two sides of the blade 2 are unbalanced, the cams 62 act to push the blade 2 to move leftwards or rightwards until the forces of the two sides of the blade 2 are balanced, namely, the blade 2 is positioned at the symmetrical position relative to the sheet body 1;
then, adopting double-beam laser welding, wherein one beam of laser is used for preheating the blade 2 and the blade body 1 locally, and the other beam of laser is used for welding, the welding method can realize the connection of various geometric bodies, the strength and the high-temperature performance of raw materials are not reduced, and the welding time only needs a few seconds, and the welding method fully utilizes the characteristic of high energy density of laser beams, thereby effectively preventing the generation of cracks in a heat affected zone in the welding process, and realizing the accurate control welding with large penetration, small fusion width, small welding heat affected zone, small residual stress and deformation and high connection strength;
F. Manually flattening the sheet body 1 by means of local hammering to reduce and eliminate internal stress and deformation caused by welding, the flattening effect being that the flatness of the sheet body 1 can be detected by the projection detecting device 51;
G. The rough grinding and the fine grinding are sequentially carried out on the blade 2, and the method specifically comprises the following steps:
g1, positioning the sheet body 1 by combining the positioning holes 12 with the A surface of the sheet body 1 as a positioning surface;
G2, because the leveling error of the blade body 1 is less than or equal to 0.03mm in flatness, and the symmetry error of the blade 2 relative to the blade body 1 is extremely small (less than or equal to +/-0.0025 mm) during welding, the blade teeth of the three blades 2 can be randomly adjusted and tried to be ground during rough grinding, and when the end face circle runout tolerance of the blade teeth of the try to be ground meets the following conditions: after delta end is less than or equal to 0.005+0.0.+1/2 delta t, the cutter teeth of all the blades 2 can be subjected to rough grinding according to the same rough grinding specification, wherein delta t is the blade width tolerance;
G3, semi-fine grinding and fine grinding are carried out on the roughly-ground blade 2 by utilizing a full-automatic numerical control gear grinding machine, and the side face of the blade 2 is ground, and the rear face and the front face are ground;
H. The chip dividing groove device 7 is utilized to form chip dividing grooves at the accurate position of the front end of each blade 2, the specific position is to ensure that the chip dividing grooves on two adjacent blades 2 are staggered and symmetrically arranged at two sides of a symmetrical line of the blades 2, the tiny chip dividing grooves enable each cutter tooth of a circular saw blade to leave a small bulge 8 at a position corresponding to the surface of a workpiece 9 to be processed, chips formed in the processing process of the workpiece 9 are divided into two parts by the small bulge 8, the next cutter tooth can mill off the small bulge 8 on the surface of the workpiece 9 reserved by the last cutter tooth, a new small bulge 8 is formed on the processing surface of the other side of the workpiece 9 along the center line of the cutter tooth, and the chips are divided into two parts by the small bulge 8 again, so that the chip dividing is circulated, the chip dividing is facilitated, the chip rolling and the chip removal are facilitated, the formation of short and narrow chips is enabled to be more light and the cutting is enabled, and the section schematic diagrams formed on the workpiece 9 by the two adjacent cutter teeth respectively are shown in fig. 10;
The chip-breaker device 7 comprises a stepping motor 71, a chip-breaker grinding wheel 72 driven by the stepping motor 71, and a screw-nut pair arranged between the stepping motor 71 and the chip-breaker grinding wheel 72, wherein the screw-nut pair comprises a large-diameter screw 73 and a small-lead nut 74, and a coupler 75 is arranged between the stepping motor 71 and the screw-nut pair, wherein the ratio k=d 3/L of the outer diameter d 3 of the screw to the lead L of the nut is larger than or equal to 20, so that the chip-breaker grinding wheel 72 can obtain an accurate position relative to the symmetry plane of the blade 2 (namely the symmetry plane of the sheet body 1).
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, i.e., the invention is not to be limited to the details of the claims and the description, but rather is to cover all modifications which are within the scope of the invention.
Claims (8)
1. The utility model provides a cermet cold saw blade manufacturing process, the saw blade includes circular lamellar body and the blade of setting on the lamellar body, and the blade is made its characterized in that by cermet: the method comprises the following steps:
A. cutting the plate to obtain a circular sheet body with a plurality of circumferentially distributed tooth grooves at the periphery, arranging a positioning hole in the center and a plurality of transmission holes circumferentially distributed around the positioning hole on the sheet body, and combining the positioning hole with the A surface of the sheet body as a positioning surface to realize five-point positioning;
B. Detecting stress of the sheet body after shot blasting or sand blasting treatment is carried out on the sheet body, and controlling granularity and speed of the shot blasting or sand blasting according to a detection result so that the stress of the sheet body meets the requirement of less than or equal to 0.2 mm;
C. the sheet body is comprehensively rolled to enable the sheet body to be leveled to a certain extent, then the flatness of the sheet body is detected, and the sheet body is sequentially graded and leveled according to the detection result, so that the flatness of the sheet body meets the requirement of less than or equal to 0.03 mm;
D. Positioning the blade into a tooth slot of the sheet body, and welding the blade on the sheet body by adopting double laser beams after the symmetry degree of the blade relative to the sheet body meets the requirement of less than or equal to +/-0.0025 mm;
E. Manually flattening the sheet to reduce and eliminate internal stress and deformation caused by welding;
F. Sequentially carrying out rough grinding and fine grinding on the blade;
f1, positioning the sheet body by combining the positioning holes with the surface A of the sheet body as a positioning surface;
F2, randomly grinding cutter teeth of a plurality of blades, wherein when the circle runout tolerance of the end faces of the cutter teeth subjected to trial grinding meets the following conditions: after delta end is less than or equal to 0.005+1/2 delta t, the cutter teeth of all the blades can be subjected to rough grinding according to the same rough grinding specification, wherein delta t is the width tolerance of the blades;
F3, semi-finish grinding and finish grinding are carried out on the blade after rough grinding by using a full-automatic numerical control gear grinding machine;
G. The front end of each blade is provided with a chip dividing groove, and the chip dividing grooves on two adjacent blades are staggered and symmetrically arranged on two sides of a symmetry line of the blade; the chip dividing groove device is utilized to form chip dividing grooves at the accurate position of the front end of each blade, the specific positions are to ensure that the chip dividing grooves on two adjacent blades are staggered and symmetrically arranged at two sides of a symmetrical line of the blade, the tiny chip dividing grooves enable each cutter tooth of the circular saw blade to leave a small bulge at a position corresponding to the surface of a workpiece to be processed, chips formed in the workpiece processing process are divided into two parts by the small bulge, the next cutter tooth can mill off the small bulge on the surface of the workpiece left by the last cutter tooth, a new small bulge is formed on the processing surface of the other side of the workpiece along the center line of the cutter tooth, the chips are divided into two parts by the small bulge again, and the cyclic reciprocation is performed, so that the chip dividing is facilitated, the chip rolling and the chip removal are facilitated, short and narrow chips are formed, and the cutting is enabled to be lighter and faster; the chip dividing groove device is used for forming the chip dividing groove at the front end of each blade, and comprises a stepping motor, a chip dividing groove grinding wheel driven by the stepping motor and a screw-nut pair arranged between the stepping motor and the chip dividing groove grinding wheel, wherein the screw-nut pair comprises a large-diameter screw rod and a small-lead nut, and the ratio k=d3/L of the outer diameter d3 of the screw rod to the lead L of the nut is more than or equal to 20.
2. The manufacturing process of the metal ceramic cold saw circular saw blade according to claim 1, wherein the manufacturing process comprises the following steps of: the step B is characterized in that the stress of the sheet body is detected by using a first detection device, the first detection device comprises a base, a positioning device arranged on the base for positioning the sheet body, a force application device capable of applying a force perpendicular to the sheet body on one side of the sheet body and a dial indicator arranged on the other side of the sheet body and close to the edge of the sheet body for detecting the stress of the sheet body, the positioning device comprises a first fixing chuck for clamping the sheet body, a first micro taper mandrel penetrating through the first fixing chuck and a sheet body positioning hole, and a first precise bearing arranged between the base and the first fixing chuck, and the positioning device is combined with the surface A of the sheet body as a positioning surface through the positioning hole to realize five-point positioning.
3. The manufacturing process of the metal ceramic cold saw circular saw blade according to claim 1, wherein the manufacturing process comprises the following steps of: and C, carrying out comprehensive rolling and sequential indexing leveling on the sheet body by using a leveling device, wherein the leveling device comprises a frame, an indexing turntable which is horizontally and rotatably arranged on the frame, a workbench which is arranged on the indexing turntable to place the sheet body, and a roller which is arranged above the workbench and is arranged on the frame in a lifting manner.
4. A process for manufacturing a circular saw blade for a cermet cold saw according to claim 1,2 or 3, characterized in that: the second detection device is used for detecting the flatness of the sheet body after comprehensive rolling in the step C, the second detection device comprises a projection detection device for accurately measuring the flatness of the sheet body and a verification device for verifying the detection result of the projection detection device, the projection detection device comprises a second fixed chuck and a movable chuck which are arranged at intervals to clamp the sheet body, a second micro taper mandrel penetrating through the second fixed chuck and the sheet body, a pushing mechanism with the end part arranged on the movable chuck to push the movable chuck to axially move along the sheet body, and a light source and a projection curtain which are oppositely arranged at two radial ends of the sheet body at intervals, and the verification device comprises a cutting edge type ruler and a feeler gauge.
5. A process for manufacturing a circular saw blade for a cermet cold saw according to claim 1,2 or 3, characterized in that: in the step D, the blade is positioned to a tooth slot of the blade body by utilizing a symmetrical positioning device, the symmetry degree of the blade relative to the blade body meets the requirement, the symmetrical positioning device comprises two rotatable pressing plates which are symmetrically arranged at intervals, two cams which are synchronously rotatably arranged on the outer sides of the upper parts of the two pressing plates, and two reset springs which are respectively arranged on the outer sides of the lower parts of the two pressing plates, the blade is arranged in the tooth slot, the two cams relatively rotate to enable the two pressing plates to relatively rotate and press the blade, and when the forces of the two sides of the blade are unbalanced, the cam acts to push the blade to move leftwards or rightwards, and the reset springs are used for enabling the two pressing plates to be in an open position.
6. A process for manufacturing a circular saw blade for a cermet cold saw according to claim 1,2 or 3, characterized in that: the blade is made of cermet of Ti (C, N) with WC, mo2C, nbC, taC, co and Ni, and the plate comprises 8CrV or 8CrNi2.
7. A process for manufacturing a circular saw blade for a cermet cold saw according to claim 1, 2 or 3, characterized in that: and E, manually leveling in the step by means of local hammering.
8. A process for manufacturing a circular saw blade for a cermet cold saw according to claim 1,2 or 3, characterized in that: and C, before the step, positioning the sheet body by taking the positioning hole and the A surface of the sheet body as positioning surfaces, and finely reaming the positioning hole and the transmission hole through a reamer.
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| CN109317752A (en) * | 2018-11-23 | 2019-02-12 | 成都壹佰科技有限公司 | A kind of processing technology of cold saw blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103537762A (en) * | 2013-11-11 | 2014-01-29 | 唐山冶金锯片有限公司 | Manufacturing method of hard alloy tooth circular saw blade |
| CN207900375U (en) * | 2018-02-02 | 2018-09-25 | 泉州市洛江区双阳金刚石工具有限公司 | A kind of cermet cold saw saw blade manufacturing device |
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| CN100402232C (en) * | 2006-07-06 | 2008-07-16 | 周荣根 | Carbide alloy metal saw production process |
| CN201565672U (en) * | 2009-11-05 | 2010-09-01 | 唐山冶金锯片有限公司 | Hard alloy gear circular saw blade capable of recycling |
| CN102039449A (en) * | 2011-01-20 | 2011-05-04 | 唐山冶金锯片有限公司 | Assembly type tungsten carbide circular saw blade |
| CN102615352B (en) * | 2012-04-16 | 2013-08-07 | 黑旋风锯业股份有限公司 | Leveling method of circular saw web base body |
| CN204321316U (en) * | 2014-12-19 | 2015-05-13 | 杭州和源精密工具有限公司 | Shock resistance type metal cold saw |
| CN205869610U (en) * | 2016-06-21 | 2017-01-11 | 杭州和源精密工具有限公司 | Impact resisting type metal cold saw |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103537762A (en) * | 2013-11-11 | 2014-01-29 | 唐山冶金锯片有限公司 | Manufacturing method of hard alloy tooth circular saw blade |
| CN207900375U (en) * | 2018-02-02 | 2018-09-25 | 泉州市洛江区双阳金刚石工具有限公司 | A kind of cermet cold saw saw blade manufacturing device |
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