CN101637829B - Oil groove milling cutter of hard alloy cold-working mould pressing blank - Google Patents
Oil groove milling cutter of hard alloy cold-working mould pressing blank Download PDFInfo
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- CN101637829B CN101637829B CN200910112392XA CN200910112392A CN101637829B CN 101637829 B CN101637829 B CN 101637829B CN 200910112392X A CN200910112392X A CN 200910112392XA CN 200910112392 A CN200910112392 A CN 200910112392A CN 101637829 B CN101637829 B CN 101637829B
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Abstract
The invention discloses an oil groove milling cutter of a hard alloy cold-working mould pressing blank, which comprises a steel basal body (2) and a PCD blade (1), wherein the steel basal body (2) is provided with 6-12 saw teeth, the number of PCD blade (1) is the same with the number of saw teeth, the back of the saw teeth of the steel basal body (2) is designed into an inclined flat bottom shape, and the PCD blade (1) is welded on the saw teeth of the steel basal body (2). Aiming at the difficult problems of low integrated intensity, hard grains and easy machined surface collapse in the processing process of a hard alloy pressing blank, the invention concretely limits multiple items of geometric parameters of the milling cutter, particularly a geometric angle. When the milling cutter isused for processing an oil groove of the hard alloy cold-working mould pressing blank, the edge of the oil groove can be kept integrated, and the machined surface roughness is kept to be not more than Ra 0.8, solving the difficult problem that the quality of the machined surface can not be ensured when the existing milling cutter is used for processing the hard alloy pressing blank.
Description
One, technical field
The present invention relates to machining tool, be specifically related to the particularly cold pier mold pressing of hard alloy cold-working mould base oil groove milling cutter processing.
Two, background technology
The cold pier mold pressing of carbide alloy base is formed through the mould compacting by composite hard alloy powder, the base substrate bulk strength is low and particle is hard, the phenomenon that very easily occurs the machined surface avalanche in the pressed compact oil groove process, and hard powder very easily causes the wearing and tearing of cutter, control to working angles Tool in Cutting power is extremely harsh, the too for a short time purpose that does not reach processing of cutting force, cutting force causes too greatly then that machined surface is badly damaged to cause processing failure, therefore very harsh requirement has been proposed cutter, not only material is good, and the multinomial geometric parameter of cutter especially geometric angle has been proposed specific requirement.
The cold pier mold pressing of carbide alloy base oil groove generally adopts diamond coated emery wheel to process at present, controls the width of cold pier moulding oil groove by the thickness of design emery wheel.Because of shape of tool structure and geometric parameter are not suitable for the processing of carbide alloy pressed compact, its machining area particularly oil groove seamed edge can't be kept perfectly, the limit phenomenon often appears collapsing, the percent defective height, and because of the structure qualification of emery wheel own normally chip removal, the crudy of oil groove is also seriously influenced, and causes roughness of machining surface, is difficult to obtain high-quality finished surface.
Patent of invention ZL01803529.9 discloses a kind of slotting cutter and cutting tip thereof, its blade is fixed on the disk with screw, for guaranteeing screw intensity, the thickness of blade can not be less than 6mm, thus can not working width less than the cold pier moulding oil of the carbide alloy of 6mm groove; ZL200520101189.X discloses a kind of circular peripheral-mill, and it can't accomplish the uniformity of each blade angle owing to adopt the form of blade assembling, influences the crudy of finished surface; " new standard machine components and cutlery handbook (weapon industry publishing house publishes, in May, 1996) have been described slotting saw with coarse teeth and convex milling cutter for the 608th page and the 614th page to reference book.Because the processing of the cold pier mold pressing of carbide alloy base oil groove has proposed specific requirement to the multinomial geometric parameter of cutter especially geometric angle, finds that through a large amount of experiments above-mentioned milling cutter all can't guarantee the crudy of finished surface.
Three, summary of the invention
The purpose of this invention is to provide a kind of oil groove milling cutter of hard alloy cold-working mould pressing blank, the complete sum machined surface roughness≤Ra0.8 that can keep the oil groove seamed edge during with this milling cutter processing rigid alloy cold-working mould pressing blank oil groove is to solve the difficult problem that existing milling cutter processing rigid alloy pressed compact can't guarantee machined surface quality.
For achieving the above object, oil groove milling cutter of hard alloy cold-working mould pressing blank of the present invention comprises that the steel matrix sawtooth back side is designed to flat shape with the steel matrix of 6～12 sawtooth and the PCD blade identical with sawtooth quantity, and the PCD blade is welded on the steel matrix sawtooth; Each the spot size parameter and the value of steel matrix and blade are as follows:
A-steel matrix center is to the distance of tooth top: 18mm～30mm;
B-steel matrix circumcircle diameter: Φ 36mm～50mm;
The c-blade face is to tooth top distance: 2mm～10mm;
D-steel matrix center line is to the distance of tooth top: 2mm～10mm;
F-blade inscribed circle diameter: Φ 28mm～40mm;
G-cutter aperture: Φ 8mm～30mm;
Inclination angle, h-steel matrix back: 30 °～45 °;
I-blade circumcircle diameter: Φ 38mm～50mm;
E-blade maximum ga(u)ge (well width): 2mm～10mm;
J-steel matrix thickness: e-(0.1mm～0.7mm)
M-blade lengths: 3mm～20mm;
N-blade thickness: 0.5mm～10mm;
P-blade welding chamfering: (0.2～4) X (15 °～60 °);
K-blade relief: 6 °～20 °;
The front clearance of y-blade: 1 °～15 °;
The angle of r-blade bottom surface and minor flank: 80 °～95 °;
S-blade arc radius: 0.5e.
Described sawtooth optimal number is 8.
The major parameter that influences the milling cutter cutting in the above-mentioned parameter comprises:
B: after PCD blade size and inscribed circle diameter f determined, the size of b had directly influenced the PCD blade and has exposed the length of steel matrix, thereby influences the rigidity of blade, the b value is more little, then the rigidity of blade is poor more, and when the steel matrix size surpassed the PCD blade, cutter then can't be realized normal cutting.
F: its span has determined the intensity and the rigidity of milling cutter steel matrix, and in the working angles of milling cutter, steel matrix will be born the effect of alternate load, and the f value too hour can be because not enough distortion, the ultimate failure of producing of the rigidity of steel matrix during milling cutter work.
H: milling cutter is in working angles, and blade will bear tangential resistance, when the h value too hour, can cause steel matrix under the effect of tangential resistance, to produce distortion, thereby cause the cutter operational failure.
Linear velocity when the i:i size has determined the cutting of milling cutter, the big more then linear velocity of i is also big more.The intensity of carbide alloy pressed compact is very low, when the linear velocity of milling cutter is too big, can be because excessive cutting force make the pressed compact collapse, thus cause the processing failure.
J: the thickness of steel matrix is determining the rigidity of steel matrix, also affects the discharge of working angles smear metal.Therefore, can guarantee that in working angles j should get big value as far as possible under the normal situation of discharging of smear metal.
K:, directly affect the sharpness and the surface of the work crudy of cutter as the relief angle of cutter.When k is too big, can shorten the service life of cutter; When the k value too hour, can can't realize less machined surface roughness because blade is too blunt.
R: the size at the r angle of cutter has influenced the size of Tool in Cutting power.R is more little, and then (tool cutting edge angle=90 °-r) big more, blade sharpness increases the blade tool cutting edge angle, but the rigidity variation of cutter, is unfavorable for that the cutter process bears cutting force, easily causes tool damage and machined surface coarse.Otherwise, r is big more, then the tool cutting edge angle of cutter is more little, though the rigidity of cutter strengthens to some extent, but too little tool cutting edge angle is unfavorable for the discharge of smear metal, as r during greater than 90 °, negative tool cutting edge angle can cause add man-hour auxiliary-blade and the workpiece contact-making surface excessive, the cutting force that workpiece is born brings oscillation phenomenon too greatly, directly influences the machined surface roughness of workpiece.
Y: the front clearance y of blade has influenced the strength and stiffness of blade, also influences the service life of cutter.When y is too big, the easy tipping of blade, thereby the service life of shortening cutter; When y too hour, can be because of blade too blunt and smear metal can't discharge, reduce the surface of the work crudy.
The present invention has solved the powder bits discharge problem of carbide alloy pressed compact process effectively by the zigzag that the adopts steel matrix flat design of tilting, and smear metal is able to timely discharge, has guaranteed the fineness of machined surface; The front clearance y of blade has guaranteed the sharpness of cutter, has reduced cutting resistance, and the selection at r angle helps the discharge of smear metal; The PCD material that adopts is made cutter, has adapted to the hard and soft processing environment of carbide alloy pressed compact powder, has guaranteed the complete of alloy pressed compact groove processing the trailing edge.
Use the cold pier mold pressing of milling cutter Milling Process carbide alloy of the present invention base oil groove, can not only keep the complete of oil groove seamed edge, the corner phenomenon do not occur lacking, and machined surface roughness is not higher than Ra0.8, the cold pier moulding oil groove behind the sintering is qualified.In addition, this milling cutter is made simply, cost is low, is easy to realize the cutter making.
Four, description of drawings
Fig. 1 is an oil groove milling cutter of hard alloy cold-working mould pressing blank front view of the present invention;
Fig. 2 is that the A of Fig. 1 is to cutaway view;
Fig. 3 is an oil groove milling cutter of hard alloy cold-working mould pressing blank PCD blade front view of the present invention;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the vertical view of Fig. 3.
Five, the specific embodiment
Below in conjunction with the concrete example of implementing the present invention is described in further detail.
Embodiment one
Fig. 1～oil groove milling cutter of hard alloy cold-working mould pressing blank of the present invention shown in Figure 5 comprises that the steel matrix sawtooth back side is designed to flat shape with the steel matrix 2 of 8 sawtooth and 8 PCD blades 1, and PCD blade 1 is welded on the steel matrix sawtooth; Each spot size parameter value of steel matrix 2 and PCD blade 1 is as follows: major parameter b: Φ 40mm, f: Φ 30.2mm, h:37 °, i: Φ 42.2mm, j:5.6mm, k:12 °, r:89 °, y:2 °; Other parameters a:18mm～30mm, c:2mm～10mm, d:2mm～10mm, e:6mm, g: Φ 8mm～30mm, m:3mm～20mm, n:0.5mm～10mm, p:(0.2～4) X (15 °～60 °), s:3mm.
Milling cutter is installed on the universal cutter grinder, sets cutter rotating speed 3600r/min; The cold pier mold pressing of clamping carbide alloy base on index chuck, and utilize dividing head to carry out oil groove position calibration, successively process the cold pier mold pressing base oil groove of YG15, two carbide alloy trades mark of YG20 respectively.
Add man-hour, adopt manual operations at the uniform velocity steadily to push workpiece, processing dimension (wide * dark) is four of 3.2mm * 2.5mm oil groove, and each groove is once finished processing.
Completion of processing checks that four oil groove seamed edges of YG15 and two kinds of trades mark of YG20 are complete, and roughness Ra0.8 meets the processing request of cold pier mould blank fully.
Embodiment two
The geometric angle of PCD blade 1 is changed into h:35 °, k:10 °, r:85 °, y:3 °, and other conditions are with embodiment one.
Milling cutter is installed on the universal cutter grinder, sets cutter rotating speed 3600r/min; The cold pier mold pressing of clamping base on index chuck, and utilize dividing head to carry out oil groove position calibration.The cold pier mold pressing base oil groove of processing YG15, two trades mark of YG20.
Add man-hour, adopt manual operations at the uniform velocity steadily pushing workpiece than jogging speed, processing dimension (wide * dark) is four of 3.2mm * 2.5mm oil groove, and every oil groove is once finished processing.
Process finds that milling cutter has the slight vibration phenomenon, the completion of processing inspection, and the oil groove seamed edge has extremely slight unfilled corner, and surface roughness is thick than embodiment one, but still meets cold pier mold pressing base oil groove processing request.
Embodiment three
The radial dimension that changes steel matrix 2 is b: Φ 44.0mm, f: Φ 34.0mm, i: Φ 46.0mm, other conditions are with embodiment one.
Milling cutter is installed on the universal cutter grinder, sets cutter rotating speed 3600r/min; The cold pier mold pressing of clamping base on index chuck, and utilize dividing head to carry out oil groove position calibration, process the cold pier mold pressing base oil groove of YG15, two trades mark of YG20 respectively.
Add man-hour, adopt manual operations steadily to push workpiece, at the uniform velocity advance with slow speed, processing dimension (wide * dark) is four of 3.2mm * 2.5mm oil groove, and every oil groove is once finished processing.
Completion of processing checks that finished surface has slight lifts phenomenon, little rough (surface roughness is Ra1.6), and the oil groove seamed edge is the slight unfilled corner in zone partly, still satisfies cold pier mold pressing base oil groove processing request.
Embodiment four
The size and the geometric angle that change cutter and PCD blade 1 simultaneously are: b: Φ 48mm, f: Φ 38.0mm, i: Φ 50.0mm, h:40 °, k:14 °, r:87 °, y:5 °, other conditions are with embodiment one.
Milling cutter is installed on the universal cutter grinder, sets cutter rotating speed 3600r/min; The cold pier mold pressing of clamping base on index chuck, and utilize dividing head to carry out oil groove position calibration.Process the cold pier mold pressing base oil groove of YG15, two trades mark of YG20 respectively.
Add man-hour, adopt manual operations at the uniform velocity steadily to push workpiece, processing dimension (wide * dark) is four of 3.2mm * 2.5mm oil groove, and each groove is once finished processing.Process finds, adopt above-mentioned cutter parameters after, cutter is than cutting edge of a knife or a sword power during cutting, the cutting chip removal is smooth, but the life-span of cutter is shorter, blade is easy to wear.
Completion of processing checks that the oil groove bottom surface and the side roughness of YG15 and two kinds of trades mark of YG20 are Ra0.8, and partly there is slight unfilled corner phenomenon in seamed edge in the zone, meets the processing request of cold pier mold pressing base oil groove.
Embodiment five
Keep the original b of cutter, f, i size, the geometric angle that changes PCD blade 1 is: h:44 °, k:16 °, r:92 °, y:12 °, other conditions are with embodiment one.
Milling cutter is installed on the universal cutter grinder, sets cutter rotating speed 3600r/min; The cold pier mold pressing of clamping base on index chuck, and utilize dividing head to carry out oil groove position calibration, the cold pier mold pressing base oil groove of processing YG15, two trades mark of YG20.
Add man-hour, adopt manual operations at the uniform velocity steadily pushing workpiece than jogging speed, processing dimension (wide * dark) is four of 3.2mm * 2.5mm oil groove, and every oil groove is once finished processing.Process finds, because r＞90 °, catching phenomenon appears in blade, and the result of swaging clamp causes and collapses the limit and machined surface is coarse.
Embodiment five h values are bigger, and the rigidity of steel matrix is better, and the k of cutter and y value are also bigger, and r=92 °, tool cutting edge angle is negative 2 °.In the process,,, therefore, still can keep machining state preferably because the sharpness of blade own is better though auxiliary-blade and workpiece produce to a certain degree friction.
Completion of processing checks that the oil groove seamed edge is complete, side and bottom surface coarse slightly (roughness is Ra1.6), and there is slight cutter trade the oil groove side, but still can reach cold pier mold pressing base oil groove processing request.
Comparative Examples
Same size high-speed steel slotting saw with coarse teeth is installed on the universal cutter grinder, set milling cutter rotating speed 3600r/min, the cold pier mold pressing of clamping base on index chuck, and utilize dividing head to carry out oil groove position calibration, the cold pier mold pressing base oil groove of processing YG15, two trades mark of YG20.
In the process, adopt manual method at the uniform velocity steadily to push workpiece than jogging speed, processing dimension (wide * dark) 3.2mm * 2.5mm oil groove; Visible oil groove seamed edge collapses the angle in the process, and machined surface is coarse, can't measure the machined surface roughness, does not reach processing request; The technological parameter that helps processing through adjustment repeatedly tries processing, and the oil groove seamed edge still collapses the limit, and finished surface is still coarse, still can't satisfy processing request.
This shows, use carbide alloy pressed compact oil groove milling cutter of the present invention, the one, can realize shaping of carbide alloy pressed compact, two are to use the life-span long, and mass production applications showed, by per tour processing eight hours, produced 26 days in every month, cutter uses continuously and did not lose efficacy yet in eight months.
Claims (2)
1. oil groove milling cutter of hard alloy cold-working mould pressing blank, comprise the steel matrix (2) of band saw tooth and the PCD blade (1) identical with sawtooth quantity, it is characterized in that: the steel matrix sawtooth back side is designed to flat shape, and PCD blade (1) is welded on the steel matrix sawtooth, 6～12 of sawtooth quantity; Each the spot size parameter and the value of steel matrix (2) and PCD blade (1) are as follows:
A-steel matrix center is to the distance of tooth top: 18mm～30mm;
B-steel matrix circumcircle diameter: Φ 36mm～50mm;
The c-blade face is to tooth top distance: 2mm～10mm;
D-steel matrix center line is to the distance of tooth top: 2mm～10mm;
F-blade inscribed circle diameter: Φ 28mm～40mm;
G-cutter aperture: Φ 8mm～30mm;
Inclination angle, h-steel matrix back: 30 °～45 °;
I-blade circumcircle diameter: Φ 38mm～50mm;
E-blade maximum ga(u)ge: 2mm～10mm;
J-steel matrix thickness: e-(0.1mm～0.7mm)
M-blade lengths: 3mm～20mm;
N-blade thickness: 0.5mm～10mm;
P-blade welding chamfering: (0.2～4) X (15 °～60 °);
K-blade relief: 6 °～20 °;
The front clearance of y-blade: 1 °～15 °
The angle of r-blade bottom surface and minor flank: 80 °～95 °;
S-blade arc radius: 0.5e.
2. according to the described oil groove milling cutter of hard alloy cold-working mould pressing blank of claim 1, it is characterized in that: described sawtooth quantity is 8.
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| CN104057271B (en) * | 2014-07-04 | 2016-05-18 | 福建金鑫钨业股份有限公司 | A kind of preparation method of carbide alloy tool and mould |
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| EP3323541B1 (en) * | 2016-11-21 | 2019-06-19 | Friedrich Gloor AG | Improved logarithmic milling head |
| CN106475618B (en) * | 2016-12-22 | 2019-01-29 | 鑫京瑞钨钢（厦门）有限公司 | Super coarse-grain hard alloy green compact disk grooving cutter |
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| DE8706935U1 (en) * | 1987-05-14 | 1987-10-08 | Impex-Essen Vertrieb Von Werkzeugen Gmbh, 8800 Ansbach | Multi-edged milling disc |
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Denomination of invention: Oil groove milling cutter of hard alloy cold-working mould pressing blank Effective date of registration: 20150623 Granted publication date: 20110608 Pledgee: Agricultural Bank of China, Limited by Share Ltd, Longyan branch Pledgor: Fujian Jinxin Tungsten Co., Ltd Registration number: 2015990000497 |
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