CN113000874A - PCD (polycrystalline Diamond) forming cutter for grooves in inner cavity of automobile part - Google Patents
PCD (polycrystalline Diamond) forming cutter for grooves in inner cavity of automobile part Download PDFInfo
- Publication number
- CN113000874A CN113000874A CN201911331953.5A CN201911331953A CN113000874A CN 113000874 A CN113000874 A CN 113000874A CN 201911331953 A CN201911331953 A CN 201911331953A CN 113000874 A CN113000874 A CN 113000874A
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- forming part
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- cutter bar
- forming
- pcd
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- 229910003460 diamond Inorganic materials 0.000 title abstract description 5
- 239000010432 diamond Substances 0.000 title abstract description 5
- 230000007704 transition Effects 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000003754 machining Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/06—Profile cutting tools, i.e. forming-tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/10—Cutting tools with special provision for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/31—Diamond
- B23B2226/315—Diamond polycrystalline [PCD]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention provides a PCD (polycrystalline Diamond) forming cutter for forming grooves in inner cavities of automobile parts, which comprises a cutter handle and a cutter bar, wherein a first blade for forming the grooves and a second blade for chamfering and forming the end part are axially arranged on the cutter bar from the front end to the cutter handle, one end of the first blade is embedded into the cutter bar, the blade of the first blade outwards protrudes out of the cutter bar, the blade comprises a groove bottom forming part, a side wall forming part and a wall surface transition forming part, the side wall forming part and the wall surface transition forming part are symmetrically arranged on two sides of the groove bottom forming part and are sequentially connected, and an included angle alpha is formed between the wall surface transition forming part and the axis of; the second blade is provided with a chamfer edge, the chamfer edge is gradually far away from the cutter bar from the front end to the rear end, and an included angle with the axis of the cutter bar is beta. The problem of the difficult processing of customer at processing automobile parts inner chamber slot is solved, product surface accuracy and quality have been improved, and one shot forming has promoted machining efficiency, has increased the cutter life-span and has reduced manufacturing cost.
Description
Technical Field
The invention relates to the technical field of cutters, in particular to a PCD (polycrystalline Diamond) forming cutter for grooves in inner cavities of automobile parts.
Background
With the improvement of living standard of people, the automobile as a common vehicle has been brought into every family. Therefore, it is important to ensure the safety of the automobile during the use.
The machining precision of each part of the automobile directly influences the quality of the automobile, further influences the safety performance of the automobile, and has potential safety hazards to drivers and passengers. Particularly, in the most important parts such as an automobile engine system, a steering system and the like, a large number of inner holes and inner cavity grooves are processed, and the port parts of the parts are also provided with chamfers,
the main function is to increase the torque transmitted by the steering wheel to the steering gear and to change the direction of force transmission. The steering gear shell is provided with a plurality of holes, different step surfaces and chamfers are arranged on the inner wall and the outer wall of each hole, as shown in figure 1, each hole is of a hole-shaped component structure, two concave rings A and B are arranged on the inner wall of each hole, chamfers are arranged at the bottoms and the edges of the concave rings, the concave rings are connected with the inner wall of the hole cavity, transition of a certain angle alpha is formed, chamfers C are arranged at the hole openings, and the angle is beta. The inner wall and the outer wall of the existing processing mode are processed by different procedures, different cutters need to be replaced, and the coaxiality of the front part and the rear part cannot be guaranteed to be completely consistent after the cutters are replaced, so that the coaxiality and other indexes of the inner hole concave ring and the outer wall step of the processed product cannot meet the processing requirements, and the product percent of pass is reduced; in addition, frequent replacement of the tool complicates the process and reduces the machining efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides a PCD (polycrystalline Diamond) forming cutter for grooves in inner cavities of automobile parts.
The technical scheme adopted for solving the technical problems is as follows: a PCD molding cutter for grooves in inner cavities of automobile parts comprises a cutter handle and a cutter rod, wherein a first blade for groove molding and a second blade for end chamfer molding are axially arranged on the cutter rod from the front end to the direction of the cutter handle, wherein,
one end of the first blade is embedded into the cutter bar, the cutting edge of the first blade protrudes out of the cutter bar, the cutting edge comprises a groove bottom forming part, a side wall forming part and a wall surface transition forming part, the side wall forming part and the wall surface transition forming part are symmetrically arranged on two sides of the groove bottom forming part and are sequentially connected, the section shape of the cutting edge part enclosed by the side wall forming part of the groove bottom forming part is rectangular, one end of the wall surface transition forming part is connected with the side wall forming part, the other end of the wall surface transition forming part extends outwards along the axial direction of the cutter bar, and an included angle with the size of alpha is formed between the;
one end of the second blade is embedded into the cutter bar, the other end of the second blade protrudes out of the surface of the cutter bar to form a chamfer edge, and the chamfer edge is gradually far away from the cutter bar from the front end to the rear end and forms an included angle beta with the axis of the cutter bar.
The more the number of the first blades is, the more the grooves formed at one time are, so that the processing time is saved, and therefore, the number of the first blades of the PCD cutter can be set according to the requirement; in addition, the bottom of the cutting edge of the cutter is provided with an inclined plane with a certain inclination angle, so that on one hand, good transition can be formed between the groove and the wall surface of the inner cavity, and on the other hand, the influence on the wall surface of the inner cavity which does not need to be processed can be avoided.
Further, in order to avoid the problem that the edges and corners of the grooves in the inner cavity are too sharp and difficult to machine, the cutting edge of the first blade further comprises a bottom chamfer forming part and a top chamfer forming part, wherein the bottom chamfer forming part is an outward convex arc with the radius of R1 and is transitionally connected between the bottom chamfer forming part and the side wall forming part; the top chamfer forming part is an inward concave arc with the radius of R2 and is in transitional connection between the side wall forming part and the wall surface transitional forming part.
Specifically, the first blades are at least two groups, each group is at least two, the blades of the same group are symmetrically distributed on the same circumference of the cutter bar along the radial direction, and the blades between the adjacent groups are arranged in a line along the axial direction of the cutter bar.
Preferably, the angle α is in the range of 4 ° to 8 °.
Preferably, the included angle α is 5 °.
Preferably, the included angle β is in the range of 15 ° to 25 °.
Preferably, the included angle β is 20 °.
Preferably, the first blade and the second blade are both made of PCD.
The invention has the beneficial effects that: according to the PCD forming cutter for the groove in the inner cavity of the automobile part, the German imported brand element six is selected as a raw material, and through the elaborative structure, the rigidity of the cutter is greatly improved by adopting a cutter handle integrated structure; the tool is precisely manufactured by using German import equipment VOLLMER, so that the problem that a customer is difficult to machine a groove in an inner cavity of an automobile part is solved, the surface precision and quality of a product machined by the customer are improved, the machining efficiency is improved by one-step forming, the service life of the tool is prolonged, the production cost is reduced, and the advantages of a PCD molding tool are highlighted.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic view of a structure of a hole-shaped workpiece.
Fig. 2 is a schematic structural diagram of the preferred embodiment of the present invention.
Fig. 3 is an enlarged view at a in fig. 2.
Fig. 4 is a schematic view of the initial positions of the tool and the workpiece at the beginning of machining.
Fig. 5 is a schematic view of the initial positions of the tool and the workpiece during machining.
Fig. 6 is a schematic view of the initial positions of the machining completion tool and the workpiece.
In the figure: 1. the cutter comprises a cutter handle, 2, a cutter rod, 3, a first blade, 31, a groove bottom forming part, 32, a bottom chamfer forming part, 33, a side wall forming part, 34, a top chamfer forming part, 35, a wall surface transition forming part, 4, a second blade, 41, a chamfer edge, 5, a cooling liquid channel, 6 and a drainage groove.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.
For clarity, in the embodiment, the side of the tool holder 2 of the tool is the front end, and the side of the tool holder 1 is the rear end.
As shown in fig. 2 and 3, the PCD forming cutter for the groove in the inner cavity of the automobile component comprises a cutter handle 1 and a cutter bar 2, wherein a first blade 3 for forming the groove and a second blade 4 for forming an end chamfer are axially arranged on the cutter bar 2 from the front end to the direction of the cutter handle 1, and the first blade 3 and the second blade 4 are both made of PCD. The number of the first blades 3 is at least two, each group is at least two, the blades of the same group are symmetrically distributed on the same circumference of the cutter bar 2 along the radial direction, and the blades between the adjacent groups are arranged in a line along the axial direction of the cutter bar 2. In this embodiment, there are two sets of first blades 3, and there are two sets of first blades. The first blade 3 has an outer diameter of revolution ∅ of 63mm with a tolerance of + -0.01 mm, and the first blade 3 has a height H of 5.74mm with a tolerance of + -0.02 mm.
One end of the first blade 3 is embedded into the cutter bar 2, a cutting edge of the first blade 3 protrudes outwards from the cutter bar 2, the cutting edge comprises a groove bottom forming part 31, a side wall forming part 33 and a wall surface transition forming part 35, the side wall forming part 33 and the wall surface transition forming part 35 are symmetrically arranged on two sides of the groove bottom forming part 31 and are sequentially connected, the section shape of a cutting edge part enclosed by the side wall forming part 33 of the groove bottom forming part 31 is rectangular, one end of the wall surface transition forming part 35 is connected with the side wall forming part 33, the other end of the wall surface transition forming part extends outwards along the axial direction of the cutter bar 2, and an included angle with the size of alpha is formed; the angle α preferably ranges from 4 to 8, and in this embodiment is 5. The distance between the first blades 3 is set according to the distance of the grooves of the workpiece.
One end of the second blade 4 is embedded into the cutter bar 2, and the other end protrudes out of the surface of the cutter bar 2 to form a chamfer edge 41, wherein the chamfer edge 41 is gradually far away from the cutter bar 2 from the front end to the rear end and forms an included angle with the axis of the cutter bar 2, and the included angle is beta. The included angle beta is preferably in the range of 15 deg. -25 deg., in this embodiment 20 deg., and the length L of the chamfer edge 41 is 3.0 mm.
In order to avoid the problem that the edges and corners of the inner cavity groove are too sharp and difficult to machine, the cutting edge of the first blade 3 further comprises a bottom chamfer forming part 32 and a top chamfer forming part 34, wherein the bottom chamfer forming part 32 is an outward convex arc with the radius of R1 and is transitionally connected between the groove bottom forming part 31 and the side wall forming part 33; the top chamfer forming part 34 is an inward concave arc with the radius of R2 and is transitionally connected between the side wall forming part 33 and the wall surface transition forming part 35. In this example, R1 is 0.4mm and R2 is 1 mm.
In order to ensure the processing precision and the service life of the cutter, a cooling liquid channel 5 is arranged inside the cutter rod 2, and a drain groove 6 is arranged on the surface of the cutter rod 2.
The cutter structure is suitable for processing inner cavity grooves, such as inner hole grooves, cylindrical surface grooves and the like, and the processing process is illustrated by taking the processing of the inner hole grooves as an example.
As shown in fig. 4, the tool shank 2 of the PCD forming tool is inserted into the inner hole of the workpiece, and the length of the insertion is adjusted to align the positions of the recessed rings a and B, and the position of the chamfer C. Then, as shown in fig. 5, since the recessed rings a and B are relatively deep, the first blade 3 starts to be machined first. The tool is rotated relative to the workpiece on the one hand and is fed linearly in the direction of the groove on the other hand, as shown in fig. 6, and the formation of the chamfer C is completed in the last second insert 4.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides an automobile parts inner chamber slot PCD becomes cutting tool which characterized in that: comprises a knife handle and a knife bar, wherein a first blade for groove forming and a second blade for end chamfer forming are axially arranged on the knife bar from the front end to the knife handle, wherein,
one end of the first blade is embedded into the cutter bar, the cutting edge of the first blade protrudes out of the cutter bar, the cutting edge comprises a groove bottom forming part, a side wall forming part and a wall surface transition forming part, the side wall forming part and the wall surface transition forming part are symmetrically arranged on two sides of the groove bottom forming part and are sequentially connected, the section shape of the cutting edge part enclosed by the side wall forming part of the groove bottom forming part is rectangular, one end of the wall surface transition forming part is connected with the side wall forming part, the other end of the wall surface transition forming part extends outwards along the axial direction of the cutter bar, and an included angle with the size of alpha is formed between the;
one end of the second blade is embedded into the cutter bar, the other end of the second blade protrudes out of the surface of the cutter bar to form a chamfer edge, and the chamfer edge is gradually far away from the cutter bar from the front end to the rear end and forms an included angle beta with the axis of the cutter bar.
2. The PCD-forming tool of claim 1, wherein: the cutting edge of the first blade further comprises a bottom chamfer forming part and a top chamfer forming part, wherein the bottom chamfer forming part is an outward convex arc with the radius of R1 and is transitionally connected between the groove bottom forming part and the side wall forming part; the top chamfer forming part is an inward concave arc with the radius of R2 and is in transitional connection between the side wall forming part and the wall surface transitional forming part.
3. The PCD-forming tool of claim 2, wherein: the first blades are at least two groups, each group is at least two, the blades of the same group are symmetrically distributed on the same circumference of the cutter bar along the radial direction, and the blades between the adjacent groups are arranged in a line along the axial direction of the cutter bar.
4. The PCD-forming tool of claim 1, wherein: the included angle alpha ranges from 4 degrees to 8 degrees.
5. The PCD-forming tool of claim 4, wherein: the included angle alpha is 5 degrees.
6. The PCD-forming tool of claim 1, wherein: the included angle beta ranges from 15 degrees to 25 degrees.
7. The PCD-forming tool of claim 5, wherein: the included angle beta is 20 degrees.
8. The PCD-forming tool of claim 1, wherein: the first blade and the second blade are both made of PCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331953.5A CN113000874B (en) | 2019-12-21 | PCD forming cutter for inner cavity groove of automobile part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331953.5A CN113000874B (en) | 2019-12-21 | PCD forming cutter for inner cavity groove of automobile part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113000874A true CN113000874A (en) | 2021-06-22 |
| CN113000874B CN113000874B (en) | 2024-05-10 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000076707A2 (en) * | 1999-06-16 | 2000-12-21 | Sandvik Gmbh | Cutting insert for camshaft milling cutter and corresponding side milling cutter |
| CN204262384U (en) * | 2014-12-10 | 2015-04-15 | 重庆瑞通实业有限公司 | A kind of gear box casing processing cover lathe tool |
| CN104690319A (en) * | 2013-12-06 | 2015-06-10 | 常州柏鹭工具科技有限公司 | Four-edge forming knife used for copper material machining |
| CN206028762U (en) * | 2016-09-12 | 2017-03-22 | 江苏戴梦德钻石科技有限公司 | Sword welds formula shaping sword |
| CN206952285U (en) * | 2017-07-20 | 2018-02-02 | 宁波宁水仪表有限公司 | Combined type reamer |
| CN209598234U (en) * | 2019-03-22 | 2019-11-08 | 长春一汽四环金仑汽车零部件有限公司 | A kind of cutter for differential casing processing |
| CN211276553U (en) * | 2019-12-21 | 2020-08-18 | 常州冶戈工具有限公司 | PCD (polycrystalline Diamond) forming cutter for grooves in inner cavity of automobile part |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000076707A2 (en) * | 1999-06-16 | 2000-12-21 | Sandvik Gmbh | Cutting insert for camshaft milling cutter and corresponding side milling cutter |
| CN104690319A (en) * | 2013-12-06 | 2015-06-10 | 常州柏鹭工具科技有限公司 | Four-edge forming knife used for copper material machining |
| CN204262384U (en) * | 2014-12-10 | 2015-04-15 | 重庆瑞通实业有限公司 | A kind of gear box casing processing cover lathe tool |
| CN206028762U (en) * | 2016-09-12 | 2017-03-22 | 江苏戴梦德钻石科技有限公司 | Sword welds formula shaping sword |
| CN206952285U (en) * | 2017-07-20 | 2018-02-02 | 宁波宁水仪表有限公司 | Combined type reamer |
| CN209598234U (en) * | 2019-03-22 | 2019-11-08 | 长春一汽四环金仑汽车零部件有限公司 | A kind of cutter for differential casing processing |
| CN211276553U (en) * | 2019-12-21 | 2020-08-18 | 常州冶戈工具有限公司 | PCD (polycrystalline Diamond) forming cutter for grooves in inner cavity of automobile part |
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