CN111545637A - Input shaft hub blind hole spline machining method - Google Patents
Input shaft hub blind hole spline machining method Download PDFInfo
- Publication number
- CN111545637A CN111545637A CN202010261457.3A CN202010261457A CN111545637A CN 111545637 A CN111545637 A CN 111545637A CN 202010261457 A CN202010261457 A CN 202010261457A CN 111545637 A CN111545637 A CN 111545637A
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- spline
- section
- blind hole
- tooth
- input shaft
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- 238000000034 method Methods 0.000 title claims description 17
- 238000003754 machining Methods 0.000 title claims description 16
- 238000001125 extrusion Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000003672 processing method Methods 0.000 abstract description 12
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010862 gear shaping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
Abstract
The processing method of the blind hole spline of the input shaft hub comprises the following steps: s1, vertically fixing the input shaft hub, wherein the blind hole of the input shaft hub faces upwards; s2, mounting and fixing the blind hole spline punch on lifting power equipment, wherein the axial lead of the blind hole spline punch is overlapped with the blind hole axial lead of the input shaft hub; s3, the lower end of a blind hole spline punch is driven by lifting power equipment at a constant speed to extend into a blind hole of an input shaft hub, an extruding spline section extrudes an internal spline of the blind hole, and a middle spline guiding section and a top spline guiding section are sequentially meshed with the internal spline extruded by the extruding spline section; and S4, driving the blind hole spline punch to reset by the lifting power equipment, namely, processing the blind hole wall of the input shaft hub to obtain the internal spline.
Description
Technical Field
The invention belongs to the technical field of input shaft hub machining, and particularly relates to a method for machining a blind hole spline of an input shaft hub.
Background
The structure of the input shaft hub is shown in the attached figure 1, a blind hole and an internal spline arranged on the wall of the blind hole are arranged in the input shaft hub, the main difficulty is the spline tooth form of the internal hole, the spline of the blind hole cannot be a spline, only gear shaping processing can be selected in machining, the efficiency is very low, and the cost is very high.
The inventor designs to process the internal spline tooth with the extruded mode, and when crowded spline, skew and torsion can appear in present spline drift, and whole deflection is generally serious to surpass 0.1mm, but to the tolerance only 0.1 mm's spline, just can't normally produce, consequently, whole course of working disability rate is higher.
Disclosure of Invention
The invention aims to solve the problems and provides a method for processing a blind hole spline of an input shaft hub, which can solve the technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the processing method of the blind hole spline of the input shaft hub comprises the following steps:
s1, vertically fixing the input shaft hub, wherein the blind hole of the input shaft hub faces upwards;
s2, fixing a blind hole spline punch on lifting power equipment, wherein the axial lead of the blind hole spline punch is coincident with the axial lead of a blind hole of an input shaft hub, the lower end of the blind hole spline punch is provided with an extrusion spline section, a middle spline guiding section and a top spline guiding section which are sequentially arranged from bottom to top at intervals, spline teeth uniformly distributed on the circumference of the extrusion spline section are in up-down one-to-one correspondence with spline teeth uniformly distributed on the circumference of the middle spline guiding section, the spline teeth in the upper-down one-to-one correspondence with the spline teeth uniformly distributed on the circumference of the top spline guiding section are in the same straight line, the outward protrusion height of the spline teeth of the extrusion spline section is equal to the outward protrusion height of the spline teeth of the middle spline guiding section, the outward protrusion height of the spline teeth of the middle spline guiding section is equal to the outward protrusion height of the spline teeth of the top spline guiding section, the top parts of the lifting power equipment and the blind hole spline punch are connected with a supporting mechanism for radially supporting the blind hole spline punch during lifting;
s3, the lower end of a blind hole spline punch is driven by lifting power equipment at a constant speed to extend into a blind hole of an input shaft hub, an extruding spline section extrudes an internal spline of the blind hole, and a middle spline guiding section and a top spline guiding section are sequentially meshed with the internal spline extruded by the extruding spline section;
and S4, driving the blind hole spline punch to reset by the lifting power equipment, namely, processing the blind hole wall of the input shaft hub to obtain the internal spline.
In the above processing method for the blind hole spline of the input shaft hub, in the step S2, each spline tooth of the extruded spline section and each spline tooth of the middle spline guiding section are connected by a first connecting guide key tooth, each spline tooth of the middle spline guiding section and each spline tooth of the top spline guiding section are connected by a second connecting guide key tooth, the outward protrusion height of the first connecting guide key tooth is smaller than the outward protrusion height of the spline tooth, and the outward protrusion height of the second connecting guide key tooth is smaller than the outward protrusion height of the spline tooth.
In the processing method of the blind hole spline of the input shaft hub, the height of the outward bulge of the first connecting guide key tooth is equal to the height of the outward bulge of the second connecting guide key tooth.
In the processing method of the blind hole spline of the input shaft hub, the spline tooth length of the extruded spline section is longer than that of the middle spline pilot section, the spline tooth length of the middle spline pilot section is shorter than that of the top spline pilot section, and the spline tooth length of the top spline pilot section is longer than that of the extruded spline section.
In the processing method of the blind hole spline of the input shaft hub, the length of the first connecting guide key tooth is shorter than that of the second connecting guide key tooth; the first connecting guide key tooth is meshed with the internal spline, and the second connecting guide key tooth is meshed with the internal spline.
In the above processing method for the blind hole spline of the input shaft hub, in the step S2, chamfers are respectively disposed at two ends of each spline tooth of the extruded spline section, each spline tooth of the middle spline pilot section, and each spline tooth of the top spline pilot section.
In the processing method of the blind hole spline of the input shaft hub, the lower end of a blind hole spline punch is provided with a cylindrical guide part and a conical guide part which are sequentially connected from bottom to top, and the upper end of the conical guide part is connected with the lower end of an extrusion spline section.
In the method for processing a blind spline of an input shaft hub, in the step S2, the lifting power device includes a punch press, and the blind spline punch is connected to a lifting power head of the punch press.
In the processing method of the blind hole spline of the input shaft hub, the supporting mechanism comprises a fixed support arranged on the punch and a supporting barrel fixed on the fixed support, the supporting barrel is sleeved in the middle of the blind hole spline punch, an inner guide spline is arranged on the inner wall of the supporting barrel, outer guide splines are arranged in the middle of the blind hole spline punch and upwards in one section, the inner guide spline and the outer guide spline are meshed and connected all the time, and the distance between the upper end face of the supporting barrel and the lower end face of the lifting power head is greater than the length of the inner spline.
In the processing method of the blind hole spline of the input shaft hub, each spline tooth of the external guide spline is vertically and one-to-one corresponding to the spline teeth uniformly distributed on the circumference of the guiding section of the top spline, the vertically and one-to-one corresponding spline teeth are positioned on the same straight line, and each spline tooth of the external guide spline is connected with each spline tooth of the guiding section of the top spline through the connecting guide key tooth III.
Compared with the prior art, the input shaft hub blind hole spline processing method has the advantages that:
the deformation, bending and torsion are prevented, the efficiency is greatly improved, and meanwhile, the size precision of the internal spline can reach 8 levels.
Drawings
Fig. 1 is a schematic view of the input hub configuration provided by the present invention.
FIG. 2 is a block diagram of a process flow of the present invention.
Fig. 3 is a schematic structural diagram of the lifting power equipment provided by the invention.
FIG. 4 is a schematic structural view of a blind spline punch provided by the present invention.
FIG. 5 is a schematic view of another perspective blind spline punch provided by the present invention.
In the figure, an input shaft hub 1, an internal spline 10, a blind hole spline punch 2, an extruded spline section 20, a middle spline pilot section 21, a top spline pilot section 22, a first connecting guide key tooth 23, a second connecting guide key tooth 24, a chamfer 25, a cylindrical guide part 26, a conical guide part 27, a lifting power device 3, a punch press 30, a supporting mechanism 4, a fixed support 31, a supporting cylinder 32 and a third connecting guide key tooth 33.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in figures 1, 2 and 3,
the processing method of the blind hole spline of the input shaft hub comprises the following steps:
s1, vertically fixing the input shaft hub 1 and enabling a blind hole of the input shaft hub 1 to face upwards; the input shaft hub 1 is held vertically by a special fixture, such as an expansion collet or the like.
And S2, mounting and fixing the blind hole spline punch 2 on the lifting power device 3, wherein the lifting power device 3 of the embodiment comprises a punch 30, and the blind hole spline punch 2 is connected to the lifting power head of the punch 30.
In order to ensure the processing precision, the axial lead of the blind hole spline punch 2 is coincident with the blind hole axial lead of the input shaft hub 1.
In order to improve the production and processing efficiency and improve the processing precision, as shown in fig. 4, the lower end of the blind hole spline punch 2 is provided with an extrusion spline section 20 which is sequentially arranged from bottom to top at intervals, a middle spline guide section 21 and a top spline guide section 22, spline teeth which are uniformly distributed on the circumference of the extrusion spline section 20 and spline teeth which are uniformly distributed on the circumference of the middle spline guide section 21 are in one-to-one correspondence from top to bottom, and spline teeth which are in one-to-one correspondence from top to bottom are positioned on the same straight line, and further, each spline tooth of the extrusion spline section 20 and each spline tooth of the middle spline guide section 21 are connected through a first connecting guide key tooth 23.
Secondly, spline teeth evenly distributed on the circumference of the middle spline pilot section 21 and spline teeth evenly distributed on the circumference of the top spline pilot section 22 are in one-to-one correspondence from top to bottom, the spline teeth in one-to-one correspondence from top to bottom are positioned on the same straight line, and each spline tooth of the middle spline pilot section 21 and each spline tooth of the top spline pilot section 22 are connected through a second connecting pilot key tooth 24.
Actually, during the machining of the internal spline, the first connecting guide key teeth 23 are meshed with the internal spline 10, and the second connecting guide key teeth 24 are meshed with the internal spline 10. This engagement further improves the machining accuracy and can already serve as a radial support for the blind spline punch 2.
The outward protruding height of the spline teeth of the extruding spline section 20 is equal to the outward protruding height of the spline teeth of the middle spline guiding section 21, the outward protruding height of the first connecting guide key teeth 23 is smaller than the outward protruding height of the spline teeth, the outward protruding height of the spline teeth of the middle spline guiding section 21 is equal to the outward protruding height of the spline teeth of the top spline guiding section 22, and the outward protruding height of the second connecting guide key teeth 24 is smaller than the outward protruding height of the spline teeth. The height of the outward bulge of the first connecting guide key teeth 23 is equal to the height of the outward bulge of the second connecting guide key teeth 24.
Also, the spline tooth length of the extruded spline section 20 is longer than the spline tooth length of the middle spline pilot section 21, the spline tooth length of the middle spline pilot section 21 is shorter than the spline tooth length of the top spline pilot section 22 and the spline tooth length of the top spline pilot section 22 is longer than the spline tooth length of the extruded spline section 20.
The length of the first coupling guide spline teeth 23 is shorter than the length of the second coupling guide spline teeth 24. The different designs of the length mainly reduce the contact surface so as to improve the smoothness and the stability of the extruded internal spline.
In addition, as shown in fig. 5, chamfers 25 are respectively provided at both ends of each spline tooth of the pressing spline section 20, each spline tooth of the middle spline pilot section 21, and each spline tooth of the top spline pilot section 22. The chamfer 25 is a beveled chamfer which serves a guiding function.
As shown in fig. 4, a cylindrical guide part 26 and a tapered guide part 27 are provided at the lower end of the blind spline punch 2, which are connected in sequence from bottom to top, and the upper end of the tapered guide part 27 is connected to the lower end of the pressing spline section 20. The outer diameter of the cylindrical guide portion 26 is equal to the diameter of the lower end of the conical guide portion 27, and the diameter of the lower end of the conical guide portion 27 is smaller than the diameter of the upper end of the conical guide portion 27, so that the cylindrical guide portion 26 is inserted into the blind hole of the input shaft hub.
As shown in fig. 3 and 4, a supporting mechanism 4 for radially supporting the blind spline punch 2 during lifting is connected to the top of the lifting power device 3 and the blind spline punch 2; specifically, this support mechanism 4 is including setting up the fixed bolster 31 on punch press 30 to and fix the support section of thick bamboo 32 on fixed bolster 31, and support section of thick bamboo 32 cover and establish at blind hole spline drift 2 middle part, is equipped with interior guide spline at the inner wall of support section of thick bamboo 32, and one section is equipped with outer guide spline in the middle part of blind hole spline drift 2 and middle part up, interior guide spline and outer guide spline mesh connection all the time, and the distance of support section of thick bamboo 32 upper end terminal surface and lift unit head lower extreme terminal surface is greater than the length of internal spline 10.
The fixing support 31 comprises a circular main body, a plurality of supporting diagonal rods with the upper ends gathered inwards are connected to the circular main body, and the supporting cylinder 32 is fixed on the inner side of the lower ends of the supporting diagonal rods which are encircled into a circle. The circular main body is fixed on the outer side of the lifting power head at the top of the punch press.
Each spline tooth of the external guide spline 28 is vertically corresponding to the spline teeth uniformly distributed on the circumference of the top spline pilot section 22 one by one, and the vertically corresponding spline teeth are on the same straight line, and each spline tooth of the external guide spline is connected with each spline tooth of the top spline pilot section 22 through a third connecting guide key tooth 33. Each spline tooth of the connecting guide spline tooth three 33 and the outer guide spline 28 is connected by a chamfer one.
The height of the outward protrusion of the connecting guide spline tooth III 33 is smaller than the protrusion height of the outer guide spline.
S3, the lifting power equipment 3 drives the lower end of the blind hole spline punch 2 to stretch into a blind hole of the input shaft hub 1 at a constant speed, the extruding spline section 20 extrudes an internal spline of the blind hole, and the middle spline guiding section 21 and the top spline guiding section 22 are sequentially meshed with the internal spline extruded by the extruding spline section 20;
and S4, the lifting power device 3 drives the blind hole spline punch 2 to reset, namely, the inner spline 10 is processed on the wall of the blind hole of the input shaft hub 1.
In this embodiment, set up the drift into extrusion spline section 20, the positive section 21 is led to the middle part spline and the positive section 22 is led to the top spline by the lower extreme head, has become the drift that has 3 work bands, and extrusion spline section 20 plays the extrusion effect, and the positive section 21 is led to the middle part spline and the positive section 22 is led to the top spline plays and leads positive effect, prevents to warp crooked and twist reverse, and efficiency promotes by a wide margin, and simultaneously, the size precision of internal spline 10 can reach 8 grades.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The input shaft hub blind hole spline machining method is characterized by comprising the following steps:
s1, vertically fixing the input shaft hub (1) and enabling a blind hole of the input shaft hub (1) to face upwards;
s2, a blind hole spline punch head (2) is installed and fixed on a lifting power device (3), the axial lead of the blind hole spline punch head (2) is coincident with the blind hole axial lead of an input shaft hub (1), the lower end of the blind hole spline punch head (2) is provided with an extrusion spline section (20), a middle spline guiding section (21) and a top spline guiding section (22) which are sequentially arranged from bottom to top at intervals, spline teeth uniformly distributed on the circumference of the extrusion spline section (20) are vertically corresponding to spline teeth uniformly distributed on the circumference of the middle spline guiding section (21) one by one, the vertically corresponding spline teeth are positioned on the same straight line, spline teeth uniformly distributed on the circumference of the middle spline guiding section (21) are vertically corresponding to spline teeth uniformly distributed on the circumference of the top spline guiding section (22) one by one, the vertically corresponding spline teeth are positioned on the same straight line, the outward protrusion height of the spline teeth of the extrusion spline section (20) is equal to the outward protrusion height of the spline teeth of the middle spline guiding section (21), the outward protruding height of the spline teeth of the middle spline guiding section (21) is equal to the outward protruding height of the spline teeth of the top spline guiding section (22), and the top of the lifting power equipment (3) and the blind hole spline punch (2) is connected with a supporting mechanism (4) for radially supporting the blind hole spline punch (2) during lifting;
s3, the lower end of a blind hole spline punch (2) is driven by lifting power equipment (3) at a constant speed to stretch into a blind hole of an input shaft hub (1), an extruding spline section (20) extrudes an internal spline of the blind hole, and a middle spline guiding section (21) and a top spline guiding section (22) are sequentially meshed with the internal spline extruded by the extruding spline section (20);
s4, the lifting power device (3) drives the blind hole spline punch (2) to reset, namely, the inner spline (10) is processed on the wall of the blind hole of the input shaft hub (1).
2. The input shaft hub blind spline machining method according to claim 1, characterized in that in the step S2, each spline tooth of the extruded spline section (20) and each spline tooth of the middle spline pilot section (21) are connected by a connecting pilot key tooth one (23), each spline tooth of the middle spline pilot section (21) and each spline tooth of the top spline pilot section (22) are connected by a connecting pilot key tooth two (24), the outwardly projecting height of the connecting pilot key tooth one (23) is smaller than the outwardly projecting height of the spline tooth, and the outwardly projecting height of the connecting pilot key tooth two (24) is smaller than the outwardly projecting height of the spline tooth.
3. The input shaft hub blind spline machining method according to claim 2, characterized in that the height of the outward projection of the first connecting guide key tooth (23) is equal to the height of the outward projection of the second connecting guide key tooth (24); the connecting guide key teeth I (23) are meshed with the internal spline (10), and the connecting guide key teeth II (24) are meshed with the internal spline (10).
4. The input shaft hub blind spline machining method according to claim 2, characterized in that the extruded spline section (20) has a spline tooth length longer than the middle spline pilot section (21), the middle spline pilot section (21) has a spline tooth length shorter than the top spline pilot section (22) and the top spline pilot section (22) has a spline tooth length longer than the extruded spline section (20).
5. The method of blind input hub spline machining according to claim 3, characterized in that the length of the connecting guide spline one (23) is shorter than the length of the connecting guide spline two (24).
6. The input hub blind spline machining method according to claim 1, characterized in that in the step S2, both ends of each spline tooth of the extruded spline section (20), each spline tooth of the middle spline pilot section (21), and each spline tooth of the top spline pilot section (22) are respectively provided with a chamfer (25).
7. The input shaft hub blind spline machining method according to claim 1, characterized in that a cylindrical guide portion (26) and a tapered guide portion (27) are provided at the lower end of the blind spline punch (2) in order from bottom to top, and the upper end of the tapered guide portion (27) is connected to the lower end of the extruded spline section (20).
8. The method of claim 1 wherein in step S2, said power lifting device (3) comprises a punch press (30), and said blind spline punch (2) is connected to a power lifting head of the punch press (30).
9. The input shaft hub blind hole spline machining method according to claim 8, characterized in that the supporting mechanism (4) comprises a fixing support (31) arranged on the punch (30) and a supporting cylinder (32) fixed on the fixing support (31), the supporting cylinder (32) is sleeved on the middle of the blind hole spline punch (2), an inner guide spline is arranged on the inner wall of the supporting cylinder (32), outer guide splines (28) are arranged on the middle of the blind hole spline punch (2) and an upward section of the middle of the blind hole spline punch (2), the inner guide spline and the outer guide spline are always in meshed connection, and the distance between the upper end face of the supporting cylinder (32) and the lower end face of the lifting power head is greater than the length of the inner spline (10).
10. The method for machining the blind hole spline of the input shaft hub according to claim 9, wherein each spline tooth of the external guide spline is in one-to-one correspondence with the spline teeth uniformly distributed on the circumference of the top spline pilot section (22) from top to bottom, and the spline teeth in one-to-one correspondence from top to bottom are positioned on the same straight line, and each spline tooth of the external guide spline is connected with each spline tooth of the top spline pilot section (22) through a connecting guide key tooth three (33).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261457.3A CN111545637B (en) | 2020-04-03 | 2020-04-03 | Input shaft hub blind hole spline machining method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010261457.3A CN111545637B (en) | 2020-04-03 | 2020-04-03 | Input shaft hub blind hole spline machining method |
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| CN111545637A true CN111545637A (en) | 2020-08-18 |
| CN111545637B CN111545637B (en) | 2021-08-03 |
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|---|---|---|---|---|
| US3535762A (en) * | 1967-09-14 | 1970-10-27 | Trw Inc | Concentric tube forging |
| JPH07310807A (en) * | 1994-05-19 | 1995-11-28 | Jidosha Kiki Co Ltd | Helical pinion gear, manufacture thereof and device therefor |
| US6257041B1 (en) * | 1994-12-29 | 2001-07-10 | Spicer Driveshaft, Inc. | Method of forming a one-piece steering shaft member |
| CN2439344Y (en) * | 2000-06-30 | 2001-07-18 | 长春汽车材料研究所 | Integral key cold extruding forming die |
| CN203599261U (en) * | 2013-12-13 | 2014-05-21 | 江苏飞船股份有限公司 | Blind hole internal spline cold-extrusion die |
| CN105013844A (en) * | 2015-08-04 | 2015-11-04 | 常熟市金华机械股份有限公司 | Cold extruding device used for internal splines of steering pump shafts of automobiles |
| CN208408054U (en) * | 2018-06-22 | 2019-01-22 | 常熟市金华机械股份有限公司 | The cold extrusion die of axis on a kind of new automobile power-assisted steering pump |
-
2020
- 2020-04-03 CN CN202010261457.3A patent/CN111545637B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535762A (en) * | 1967-09-14 | 1970-10-27 | Trw Inc | Concentric tube forging |
| JPH07310807A (en) * | 1994-05-19 | 1995-11-28 | Jidosha Kiki Co Ltd | Helical pinion gear, manufacture thereof and device therefor |
| US6257041B1 (en) * | 1994-12-29 | 2001-07-10 | Spicer Driveshaft, Inc. | Method of forming a one-piece steering shaft member |
| CN2439344Y (en) * | 2000-06-30 | 2001-07-18 | 长春汽车材料研究所 | Integral key cold extruding forming die |
| CN203599261U (en) * | 2013-12-13 | 2014-05-21 | 江苏飞船股份有限公司 | Blind hole internal spline cold-extrusion die |
| CN105013844A (en) * | 2015-08-04 | 2015-11-04 | 常熟市金华机械股份有限公司 | Cold extruding device used for internal splines of steering pump shafts of automobiles |
| CN208408054U (en) * | 2018-06-22 | 2019-01-22 | 常熟市金华机械股份有限公司 | The cold extrusion die of axis on a kind of new automobile power-assisted steering pump |
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| CN111545637B (en) | 2021-08-03 |
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Address after: Haiyan County of Jiaxing City, Zhejiang province 314311 Shendang Town Industrial Park Applicant after: Zhejiang Sanwei Datong Precision Forging Co.,Ltd. Address before: Haiyan County of Jiaxing City, Zhejiang province 314311 Shendang Town Industrial Park Applicant before: ZHEJIANG 3D DATONG COLD EXTRUSION Co.,Ltd. |
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Denomination of invention: Processing method for blind hole spline of input shaft hub Granted publication date: 20210803 Pledgee: Bank of China Limited Haiyan Branch Pledgor: Zhejiang Sanwei Datong Precision Forging Co.,Ltd. Registration number: Y2024980002596 |
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