CN113305374B - Grinding type thread machining tool - Google Patents
Grinding type thread machining tool Download PDFInfo
- Publication number
- CN113305374B CN113305374B CN202110695893.6A CN202110695893A CN113305374B CN 113305374 B CN113305374 B CN 113305374B CN 202110695893 A CN202110695893 A CN 202110695893A CN 113305374 B CN113305374 B CN 113305374B
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- cutting strip
- cutting
- pressing block
- cutter
- strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/08—Thread-cutting tools; Die-heads with means for adjustment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2200/00—Details of threading tools
- B23G2200/06—Connections between parts of threading tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2200/00—Details of threading tools
- B23G2200/10—Threading tools comprising cutting inserts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G2225/00—Materials of threading tools, workpieces or other structural elements
- B23G2225/28—Hard metal, i.e. cemented carbides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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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 discloses a grinding type thread machining cutter, and relates to the technical field of machining cutters. Provided is a repairable thread processing tool which can be repeatedly used in grinding and can be simply ground. The grinding type thread machining cutter comprises a cutter bar, a cutting strip and a fixing structure; the cutter bar is horizontally arranged, a cutting bar hole is formed in the front of the cutter bar, the cutting bar hole extends from the top surface of the cutter bar to the rear-down direction, and the front side wall surface of the cutting bar hole is a V-shaped positioning surface; the cutting strip is inserted into the cutting strip hole, the front surface of the cutting strip is provided with two rear tool faces, the top surface of the cutting strip is a front tool face, the intersection line of the rear tool faces and the front tool face is a cutting edge, the included angle of the two rear tool faces is matched with the thread profile angle, the upper part of the cutting strip is exposed out of the cutter bar, and the cutting edge exceeds the front end of the cutter bar; the fixing structure is arranged on the cutter bar and compresses the cutting strip forwards, so that the rear cutter face is tightly abutted against the V-shaped positioning face; when the fixing structure is loosened, the cutting strip can move along the cutting strip hole.
Description
Technical Field
The invention relates to the technical field of machining tools, in particular to a grinding type thread machining tool.
Background
The high-speed steel cutter bar is a traditional thread machining cutter and is still widely applied at present. The high-speed steel knife strip is characterized in that when the knife edge is worn or broken, the knife edge can be ground again, so that the high-speed steel knife strip can be continuously used, and the use cost is low. However, when the conventional high-speed steel cutter bar is ground, a tooth form angle needs to be ground, a plurality of surfaces need to be ground, the grinding difficulty is high, the technical requirements on a grinder are high, and the application range and the prospect of the thread machining cutter are influenced.
Zl200910030146.X discloses a threading tool mechanism, the head of which is substantially the same as the high-speed steel blade, and although grinding can be performed, the grinding difficulty is large.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is a repairable thread processing tool which can be repeatedly used in grinding and can be simply ground.
The technical scheme adopted for solving the problems is as follows: the grinding type thread machining cutter comprises a cutter bar, a cutting strip and a fixing structure; the cutter bar is horizontally arranged, a cutting bar hole is formed in the front of the cutter bar, the cutting bar hole extends from the top surface of the cutter bar to the rear-down direction, and the front side wall surface of the cutting bar hole is a V-shaped positioning surface; the cutting strip is inserted into the cutting strip hole, the front surface of the cutting strip is provided with two rear cutter faces, the top surface of the cutting strip is a front cutter face, the intersection line of the rear cutter faces and the front cutter face is a cutting edge, the included angle of the two rear cutter faces is matched with the thread profile angle, the upper part of the cutting strip is exposed out of the cutter bar, and the cutting edge exceeds the front end of the cutter bar; the fixing structure is arranged on the cutter bar and compresses the cutting strip forwards, so that the rear cutter face is tightly abutted against the V-shaped positioning face; when the fixing structure is loosened, the cutting strip can move along the cutting strip hole.
Further, the method comprises the following steps: a pressing block cavity is arranged on the cutter bar and is positioned behind the cutting strip hole, and the rear wall surface of the pressing block cavity is a vertical positioning surface; the rear side of the cutting strip is provided with a plurality of cutting strip teeth which are continuously arranged along the length direction of the cutting strip, and the cutting strip teeth are provided with cutting strip tooth top surfaces which are horizontally arranged and cutting strip tooth side surfaces which are vertically arranged; the fixing structure comprises a pressing block and a locking screw; the pressing block is wedge-shaped, is positioned in the pressing block cavity and can move up and down, the front side of the pressing block is provided with a plurality of pressing block teeth, and the pressing block teeth are provided with a horizontally arranged pressing block tooth bottom surface and a vertically arranged pressing block tooth side surface; the locking screw is vertically arranged, the locking screw is connected with the cutter bar and tightly supports the pressing block downwards, the rear side face of the pressing block supports against the vertical positioning face, teeth of the pressing block are meshed with the cutting rack teeth, the tooth bottom face of the pressing block supports against the top face of the cutting rack teeth, and the tooth side face of the pressing block supports against the tooth side face of the cutting rack teeth.
Further, the method comprises the following steps: the grinding type thread machining cutter comprises an upper top screw, and the upper top screw is connected with the cutter bar and can be used for jacking a pressing block.
Further, the method comprises the following steps: the left side surface and the right side surface of the pressing block are attached to the left wall surface and the right wall surface of the pressing block cavity.
Further, the method comprises the following steps: the locking screw is provided with a guide post, the pressing block is provided with a guide hole, and the guide post is inserted into the guide hole and matched with the guide hole.
Further, the method comprises the following steps: the cutting strip is provided with two cutting strip side surfaces positioned behind the rear tool face, the wall surface of the cutting strip hole comprises two hole side wall surfaces positioned behind the V-shaped positioning surface, and the cutting strip side surfaces are attached to the hole side wall surfaces.
Further, the method comprises the following steps: the included angle between the axis of the cutting strip hole and the axis of the cutter rod is 60 degrees.
Further, the method comprises the following steps: the side surface of the cutting strip is provided with position mark scales arranged along the length direction of the cutting strip.
The invention has the beneficial effects that: 1. when the cutting edge is worn or broken, the cutting strip is adjusted to increase the extension length of the cutting strip or is detached, and the cutting strip is ground and repaired. Because of the front surface of cutting strip is two back knife faces, and the contained angle of two back knife faces matches for with screw thread profile angle, during the grinding, need not grind back knife face, also need not grind out the profile angle, only need grind the top surface of cutting strip and grind out cutting edge and rake face again can. Compared with the prior art, the grinding method is obviously simpler and more convenient, has low technical requirement on a grinder, and can save grinding time. The method is beneficial to wider application of the grinding type thread processing cutter.
2. The cutting strip can be ground for use as long as the cutting strip is kept at a fixed length, and the rest part of the cutting strip can be ground for use, so that the grinding tool can be ground for a long time, the service time of the cutting strip is long, and the strength of the cutting strip cannot be influenced after grinding.
Drawings
FIG. 1 is a front view of a repairable thread cutting tool;
FIG. 2 is a front elevational view of a repairable thread cutting tool;
FIG. 3 is a top view of the front of the refurbished thread cutting tool;
FIG. 4 is a further modified view of the nose of the repairable thread cutting tool;
labeled as: the tool holder comprises a tool bar 1, a cutting bar hole 11, a pressing block cavity 12, a vertical positioning surface 13, a V-shaped positioning surface 14, a hole side wall surface 15, a cutting bar 2, a flank surface 21, a rake surface 22, a cutting edge 23, a cutting bar tooth 24, a cutting bar tooth top surface 25, a cutting bar tooth side surface 26, a position mark scale 27, a cutting bar side surface 28, a fixing structure 3, a pressing block 31, a pressing block tooth 311, a pressing block tooth bottom surface 312, a pressing block tooth side surface 313, a guide hole 314, a locking screw 32, a guide column 321 and an upper jacking screw 4.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1 to 4, the repairable thread machining tool includes a tool bar 1, a cutting bar 2, and a fixing structure 3; the cutter bar 1 is horizontally arranged, the front part of the cutter bar 1 is provided with a cutting strip hole 11, the cutting strip hole 11 extends from the top surface of the cutter bar 1 to the rear and lower direction, and the front side wall surface of the cutting strip hole 11 is a V-shaped positioning surface 14; the cutting strip 2 is inserted into the cutting strip hole 11, the front surface of the cutting strip 2 is provided with two rear tool surfaces 21, the top surface of the cutting strip 2 is provided with a front tool surface 22, the intersection line of the rear tool surface 21 and the front tool surface 22 is a cutting edge 23, the included angle of the two rear tool surfaces 21 is matched with the thread form angle, the upper part of the cutting strip 2 is exposed out of the cutter bar 1, and the cutting edge 23 exceeds the front end of the cutter bar 1; the fixing structure 3 is arranged on the cutter bar 1 and presses the cutting strip 2 forwards, so that the rear cutter face 21 is abutted against the V-shaped positioning face 14; when the fixing structure 3 is released, the cutter bar 2 can move along the cutter bar hole 11.
When the cutting edge 23 is worn or broken, the fixing structure 3 is loosened, the position of the cutting strip 2 is adjusted to increase the extending length of the cutting strip or the cutting strip 2 is detached, and the cutting strip 2 is ground and repaired. Because the front surface of cutting strip 2 is two flank faces 21, and the contained angle of two flank faces 21 matches with the screw thread profile angle, during the grinding, need not grind flank face 21, also need not grind out the profile angle, only need grind the top surface of cutting strip 2 and grind out cutting edge 23 and rake face 22 again. Compared with the prior art, the grinding method is obviously simpler and more convenient, has low technical requirement on a grinder, and can save grinding time. The high-grindable thread machining tool is beneficial to being widely applied.
The different thread profile angles are different, for example, 60 ° for a metric triangular thread, 30 ° for a metric trapezoidal thread, 29 ° for an acme female trapezoidal thread, 55 ° for an english hui triangular thread, and the included angle of the two flank surfaces 21 of the cutting strip 2 can be designed to be different depending on the thread to be cut.
The fixing structure 3 can be a compression screw, the compression screw is perpendicular to the cutting strip 2 and is in threaded connection with the cutter bar 1, and the compression screw is screwed down to compress the cutting strip 2, so that the cutting strip 2 can be fixed.
The above-mentioned method relies on the friction force to prevent the cutting strip 2 from moving down, and the reliability is relatively poor. A pressing block cavity 12 is formed in a preferable cutter bar 1, the pressing block cavity 12 is located behind a cutting strip hole 11, and the rear wall surface of the pressing block cavity 12 is a vertical positioning surface 13; the rear side of the cutting strip 2 is provided with a plurality of cutting strip teeth 24 which are continuously arranged along the length direction of the cutting strip 2, and the cutting strip teeth 24 are provided with a horizontally arranged cutting strip tooth top surface 25 and a vertically arranged cutting strip tooth side surface 26; the fixing structure 3 comprises a pressing block 31 and a locking screw 32; the shape of the pressing block 31 is wedge-shaped, the pressing block 31 is positioned in the pressing block cavity 12 and can move up and down, a plurality of pressing block teeth 311 are arranged on the front side of the pressing block 31, and each pressing block tooth 311 is provided with a horizontally arranged pressing block tooth bottom surface 312 and a vertically arranged pressing block tooth side surface 313; the locking screw 32 is vertically arranged, the locking screw 32 is connected with the cutter bar 1 and downwards supports against the compression block 31, the rear side surface of the compression block 31 supports against the vertical positioning surface 13, the compression block teeth 311 are meshed with the cutting rack teeth 24, the compression block tooth bottom surface 312 supports against the cutting rack tooth top surface 25, and the compression block tooth side surface 313 supports against the cutting rack tooth side surface 26.
When the cutting strip 2 works, the cutting strip 2 can only move backwards and downwards along the cutting strip hole 11 under the action of a downward force given by a workpiece due to the action of the cutting strip hole 11; however, since the tooth side 313 of the pressing block abuts against the tooth side 26 of the cutting strip and the rear side of the pressing block 31 abuts against the vertical positioning surface 13, the cutting strip 2 cannot move backward, i.e., cannot move backward and downward. The fixing structure 3 limits the movement of the cutting strip 2 by the surface-to-surface abutting, and has high reliability.
When the cutting strip 2 needs to be ground, the locking screw 32 is loosened, the pressing block 31 moves upwards, the cutting strip teeth 24 are separated from the pressing block teeth 311, and the cutting strip 2 can be moved and taken out. If the cutting strip 2 is detached, after grinding is completed, the cutting strip 2 is inserted into the cutting strip hole 11, and the locking screw 32 is tightened again to enable the pressing block 31 to press the cutting strip 2 again.
As shown in fig. 3, a thin rod can be used to extend into the cavity 12 from below the tool holder 1 and press the pressing block 31 upward to move it upward, but this is cumbersome. To facilitate the lifting of the holding-down block 31. As shown in fig. 3, the thread machining tool preferably includes a top screw 4, and the top screw 4 is connected to the shank 1 and can be pressed against the pressing block 31. The upper jacking screw 4 can be rotated to jack the pressing block 31. When the cutting strip 2 is installed back, the upper jacking screw 4 is retracted.
In order to prevent the pressing block 31 from moving left and right and swinging, left and right side surfaces of the pressing block 31 preferably abut against left and right wall surfaces of the pressing block cavity 12.
Further, in order to limit the pressing block 31 to move only up and down, as shown in fig. 4, it is preferable that the locking screw 32 has a guide post 321, the pressing block 31 has a guide hole 314, and the guide post 321 is inserted into the guide hole 314 and engaged with the guide hole 314. The guide post 321 and the guide hole 314 should be a loose fit and have a loose fit.
The flank surface 21 abuts against the V-shaped positioning surface 14 to prevent the cutting strip 2 from moving left and right and swinging, and in order to further improve the positioning effect, it is preferable that the cutting strip 2 has two cutting strip side surfaces 28 located behind the flank surface 21, the wall surface of the cutting strip hole 11 includes two hole side wall surfaces 15 located behind the V-shaped positioning surface 14, and the cutting strip side surfaces 28 are attached to the hole side wall surfaces 15. This improves the positioning effect and prevents chips from entering the chip pocket 11.
If the cutting strip 2 is vertically arranged, the cutting edge 23 cannot exceed the front end of the cutter bar 1, so that cutting is difficult to realize, and the angle of the flank surface 21 does not meet the requirement. If the cutting strip 2 is horizontally disposed, it cannot be easily ground. The cutting chip 2 of the present invention is thus disposed obliquely, which requires the cutting chip hole 11 to extend downward from the top surface of the holder 1. In general, the angle between the axis of the cutter bar hole 11 and the axis of the cutter bar 1 is preferably 60 °.
The length of the cutting strip 2 exposed out of the upper surface of the cutter bar 1 is proper, if the length is too short, the length of the cutting edge 23 is not enough, and if the length is too long, the stability of the cutter is poor. In order to facilitate the control of the length of the cutting strip 2 exposed from the upper surface of the tool holder 1, the cutting strip 2 preferably has a position mark scale 27 on the side surface along the length direction of the cutting strip 2. The length of the cutting strip 2 exposed out of the upper surface of the cutter bar 1 can be controlled by observing the position mark scale 27 of the cutter bar 1 and controlling the insertion depth of the cutting strip 2.
The tool holder 1 and the holding-down piece 31 of the invention can be made of the materials of conventional tool holders. The cutting strip 2 may be made of high speed steel or cemented carbide.
Claims (1)
1. The grinding type thread machining tool comprises a tool bar (1); the method is characterized in that: comprises a long-strip-shaped cutting strip (2) and a fixing structure (3); the cutter bar (1) is horizontally arranged, a cutting strip hole (11) is formed in the front of the cutter bar (1), the cutting strip hole (11) extends from the top surface of the cutter bar (1) to the rear-down direction, and the front side wall surface of the cutting strip hole (11) is a V-shaped positioning surface (14); the cutting strip (2) is inserted into the cutting strip hole (11), the front surface of the cutting strip (2) is provided with two rear cutter surfaces (21), the top surface of the cutting strip (2) is provided with a front cutter surface (22), the intersection line of the rear cutter surface (21) and the front cutter surface (22) is a cutting edge (23), the included angle of the two rear cutter surfaces (21) is matched with the thread profile angle, the upper part of the cutting strip (2) is exposed out of the cutter bar (1), and the cutting edge (23) exceeds the front end of the cutter bar (1); the fixing structure (3) is arranged on the cutter bar (1) and presses the cutting strip (2) forwards, so that the rear cutter face (21) is tightly propped against the V-shaped positioning face (14); when the fixing structure (3) is loosened, the cutting strip (2) can move along the cutting strip hole (11); when the cutting edge (23) is worn or broken, the fixing structure (3) is loosened, the position of the cutting strip (2) is adjusted to increase the extending length of the cutting strip, and the cutting strip (2) can be ground and repaired;
a pressing block cavity (12) is formed in the cutter bar (1), the pressing block cavity (12) is located behind the cutting strip hole (11), and the rear wall surface of the pressing block cavity (12) is a vertical positioning surface (13); the rear side of the cutting strip (2) is provided with a plurality of cutting strip teeth (24) which are continuously arranged along the length direction of the cutting strip (2), and the cutting strip teeth (24) are provided with cutting strip tooth top surfaces (25) which are horizontally arranged and cutting strip tooth side surfaces (26) which are vertically arranged; the fixing structure (3) comprises a pressing block (31) and a locking screw (32); the shape of the pressing block (31) is wedge-shaped, the pressing block (31) is positioned in the pressing block cavity (12) and can move up and down, a plurality of pressing block teeth (311) are arranged on the front side of the pressing block (31), and each pressing block tooth (311) is provided with a horizontally arranged pressing block tooth bottom surface (312) and a vertically arranged pressing block tooth side surface (313); the locking screw (32) is vertically arranged, the locking screw (32) is connected with the cutter bar (1) and downwards abuts against the pressing block (31), the rear side face of the pressing block (31) abuts against the vertical positioning face (13), the pressing block teeth (311) are meshed with the cutting rack teeth (24), the tooth bottom face (312) of the pressing block abuts against the top face (25) of the cutting rack teeth, and the tooth side face (313) of the pressing block abuts against the tooth side face (26) of the cutting rack teeth;
the tool rest further comprises an upper top screw (4), wherein the upper top screw (4) is connected with the tool bar (1) and can be used for jacking the compression block (31);
the left side surface and the right side surface of the compaction block (31) are attached to the left wall surface and the right wall surface of the compaction block cavity (12);
the locking screw (32) is provided with a guide post (321), the pressing block (31) is provided with a guide hole (314), and the guide post (321) is inserted into the guide hole (314) and matched with the guide hole (314);
the cutting strip (2) is provided with two cutting strip side surfaces (28) positioned behind the rear cutter surface (21), the wall surface of the cutting strip hole (11) comprises two hole side wall surfaces (15) positioned behind the V-shaped positioning surface (14), and the cutting strip side surfaces (28) are attached to the hole side wall surfaces (15);
the included angle between the axis of the cutting strip hole (11) and the axis of the cutter bar (1) is 60 degrees;
the side surface of the cutting strip (2) is provided with position mark scales (27) arranged along the length direction of the cutting strip (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695893.6A CN113305374B (en) | 2021-06-23 | 2021-06-23 | Grinding type thread machining tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110695893.6A CN113305374B (en) | 2021-06-23 | 2021-06-23 | Grinding type thread machining tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113305374A CN113305374A (en) | 2021-08-27 |
| CN113305374B true CN113305374B (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110695893.6A Active CN113305374B (en) | 2021-06-23 | 2021-06-23 | Grinding type thread machining tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN113305374B (en) |
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| Publication number | Publication date |
|---|---|
| CN113305374A (en) | 2021-08-27 |
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