CN111266463B - New inner star wheel forming die structure - Google Patents
New inner star wheel forming die structure Download PDFInfo
- Publication number
- CN111266463B CN111266463B CN202010201178.8A CN202010201178A CN111266463B CN 111266463 B CN111266463 B CN 111266463B CN 202010201178 A CN202010201178 A CN 202010201178A CN 111266463 B CN111266463 B CN 111266463B
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- star wheel
- molding part
- cylinder
- inner star
- face
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- 238000000465 moulding Methods 0.000 claims abstract description 71
- 230000005540 biological transmission Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
本发明公开了新型内星轮成型模具结构，包括上模与下模，上模包括上成型件，下模包括下成型件，上成型件底部设置有与内星轮标准件上半部相适应的上槽口，上成型件底部设置有拱起部，拱起部的内壁面适应球道一的外壁面，拱起部的端面衔接在球道一的直径最大处，下成型件顶部设置有与内星轮标准件下半部相适应的下槽口，下成型件定部设置有内陷部，上成型件与下成型件端面可贴合，拱起部可嵌入内陷部且两者端面相贴合。实现非一致形状球道的成型，能够脱模得到内星轮。
The invention discloses a novel inner star wheel forming mold structure, including an upper mold and a lower mold, wherein the upper mold includes an upper molding part, and the lower mold includes a lower molding part, wherein the upper molding part is provided with an upper notch adapted to the upper half of the inner star wheel standard part at the bottom, and an arched part is provided at the bottom of the upper molding part, wherein the inner wall surface of the arched part is adapted to the outer wall surface of the ballway one, and the end surface of the arched part is connected to the maximum diameter of the ballway one, and the top of the lower molding part is provided with a lower notch adapted to the lower half of the inner star wheel standard part, and the fixed part of the lower molding part is provided with an indented part, and the end surfaces of the upper molding part and the lower molding part can be fitted, and the arched part can be embedded in the indented part and the end surfaces of the two can be fitted. The molding of the ballway of non-uniform shape can be realized, and the inner star wheel can be demoulded to obtain the inner star wheel.
Description
Technical Field
The invention relates to a forming die of an inner star wheel for an automobile transmission shaft, in particular to a novel inner star wheel forming die structure.
Background
The inner star wheel and the outer star wheel of the automobile transmission shaft are assembled together, and the transmission in the rotation direction is realized through the balls. The inner star wheel and the outer star wheel of the automobile transmission shaft are important parts of the automobile transmission shaft. The invention relates to an inner star wheel structure, which comprises a columnar member body, wherein the columnar member body is internally provided with shaft holes coaxial with the columnar member body, the outer edge of the columnar member body is provided with spherical raceways capable of accommodating steel balls, the number of the spherical raceways is 6, and the spherical raceways are uniformly distributed on the outer edge of the columnar member body.
In the traditional inner star wheel structure, the shape and the direction of each lane are consistent, namely the upper and lower parting surfaces of the product are on the same plane. Therefore, when the die is designed, the contact surfaces of the upper die and the lower die are the same plane, and the upper die and the lower die are in contact pressing fit with each other. The inner star wheel structure is a novel structure, as shown in fig. 1, the inner star wheel 03 is of a sphere-like structure, a plurality of spherical ball tracks are arranged on the surface of the inner star wheel 03, the shapes of two adjacent spherical ball tracks are different, the two adjacent spherical ball tracks are respectively marked as a first ball track and a second ball track, as shown in fig. 1, the largest diameter position of the second ball track 02 is positioned in the middle part of the second ball track, and the largest diameter position of the first ball track 01 is not positioned in the middle part of the second ball track, but positioned in the lower part of the second ball track. Therefore, the inner star wheel with the structure cannot be obtained by adopting the traditional upper die and the lower die with the plane contact surfaces, and the inner star wheel with the structure is difficult to be demolded from the die.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel inner star wheel forming die structure which can realize the forming of a spherical channel with a non-uniform shape and can be used for demolding to obtain an inner star wheel.
The novel inner star wheel forming die structure comprises an upper die and a lower die, wherein the upper die comprises an upper forming piece, the lower die comprises a lower forming piece, an upper notch which is matched with the upper half part of an inner star wheel standard piece is formed in the bottom of the upper forming piece, an arched portion is formed in the bottom of the upper forming piece, the inner wall surface of the arched portion is matched with the outer wall surface of a first lane, the end surface of the arched portion is connected to the position with the largest diameter of the first lane, a lower notch which is matched with the lower half part of the inner star wheel standard piece is formed in the top of the lower forming piece, an inner notch is formed in the fixed portion of the lower forming piece, the end surfaces of the upper forming piece and the lower forming piece can be jointed, and the arched portion can be embedded into the inner notch and is jointed with the end surfaces of the inner notch.
According to a further preferred scheme of the invention, the upper die further comprises an upper barrel part wrapped on the periphery of the upper forming part, the lower die further comprises a lower barrel part wrapped on the periphery of the lower forming part, and the upper barrel part and the lower barrel part are identical in structure.
According to a further preferred scheme of the invention, the end face of the upper molding piece is positioned in the upper barrel piece, the end face of the lower molding piece extends out of the lower barrel piece, the upper barrel piece is attached to the lower barrel piece, and then the end face of the lower molding piece extends into the upper barrel piece and is attached to the end face of the lower molding piece.
According to a further preferred scheme of the invention, the end face of the upper molding part extends out of the upper cylinder part, the end face of the lower molding part is positioned in the lower cylinder part, the upper cylinder part is attached to the lower cylinder part, and then the end face of the upper molding part extends into the lower cylinder part and is attached to the end face of the lower molding part.
According to a further preferred scheme, the upper cylinder is sleeved with the base, the base is fixedly connected with the upper cylinder, and the bottom surface of the base is flush with the bottom surface of the upper cylinder.
According to a further preferred scheme of the invention, the lower barrel part is sleeved with the base, the base is fixedly connected with the lower barrel part, and the top surface of the base is flush with the top surface of the lower barrel part.
In a further preferred embodiment of the present invention, the end face of the upper molding member is transited to the end face of the arch portion by an inclined face, and the end face of the lower molding member is transited to the end face of the recess portion by an inclined face.
According to a further preferred scheme of the invention, the upper die is provided with a through hole for the punch to pass through, and the punch can enter the upper notch to act on the inner star wheel.
According to a further preferred scheme of the invention, the lower die is provided with a through hole for the punch to pass through, and the punch can enter the lower notch to act on the inner star wheel.
Compared with the prior art, the invention has the advantages that the maximum diameter position of the second ball channel based on the inner star wheel to be formed is positioned at the middle part of the second ball channel, and the maximum diameter position of the first ball channel is positioned at the lower part of the first ball channel. The invention is provided with an upper notch at the bottom of the upper molding part for realizing the molding of the upper half part of the inner star wheel. Then, an arch part is arranged at the bottom of the upper forming part, the inner wall surface of the arch part is adapted to the outer wall surface of the first ball channel, and the arch part extends downwards from the upper forming part, so that the lower part of the middle part of the first ball channel can be formed. The end face of the arch part is connected to the position with the largest diameter of the first ball channel, the lower forming part fixing part is provided with an inward sinking part, and the arch part can be embedded into the inward sinking part and the end faces of the arch part and the lower forming part are jointed. In other words, the invention sets the structure of the arch part and the inward sinking part in the upper die and the lower die, takes the maximum diameter part as the boundary for molding the first part of the ball channel, designs the parting surface of the upper die and the lower die, realizes the molding of the first part of the ball channel, and then matches with the upper molding part and the lower molding part with the end faces capable of being attached to each other to realize the molding of the integral structure of the inner star wheel. The upper die end surface and the lower die end surface are curved surfaces matched with each other, when the upper die is combined with the lower die, the inner core wheel can be formed, and when the upper die is separated from the lower die, the inner core wheel structure can be pulled out from the die.
Drawings
The invention will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the invention. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.
FIG. 1 is a diagram of an inner star wheel structure to be formed in accordance with the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a schematic diagram of an upper mold according to an embodiment of the present invention;
FIG. 4 is a schematic view of a lower die according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 2 to 4, the novel inner star wheel forming die structure comprises an upper die and a lower die, wherein the upper die comprises an upper forming part 1, the lower die comprises a lower forming part 2, an upper notch 3 which is matched with the upper half part of an inner star wheel 03 standard part is arranged at the bottom of the upper forming part 1, an arch part 1a is arranged at the bottom of the upper forming part 1, the inner wall surface of the arch part 1a is matched with the outer wall surface of a lane one 01, the end surface of the arch part 1a is positioned at the position with the largest diameter of the lane one 01, a lower notch 4 which is matched with the lower half part of the inner star wheel 03 standard part is arranged at the top of the lower forming part 2, an inner notch 2a is arranged at the fixed part of the lower forming part 2, the upper forming part 1 and the end surface of the lower forming part 2 can be jointed, the arch part 1a can be embedded into the inner notch 2a, and the end surfaces of the two are jointed.
The upper die further comprises an upper barrel part 5 wrapped on the periphery of the upper forming part 1, the lower die further comprises a lower barrel part 6 wrapped on the periphery of the lower forming part 2, and the upper barrel part 5 and the lower barrel part 6 are identical in structure. In the invention, the upper molding part 1, the arch part 1a and the upper barrel 5 are integrated. The lower molding member 2, the recessed portion 2a, and the lower tubular member 6 of the present invention are integrally formed.
The end face of the upper molding piece 1 is positioned in the upper barrel piece 5, the end face of the lower molding piece 2 extends out of the lower barrel piece 6, the upper barrel piece 5 is attached to the lower barrel piece 6, and then the end face of the lower molding piece 2 extends into the upper barrel piece 5, and the upper molding piece 1 is attached to the end face of the lower molding piece 2. The structural design of the upper cylinder part 5 and the lower cylinder part 6 and the structural design of the upper molding part 1 and the lower molding part 2 are matched, so that the reference positioning of the upper die and the lower die in the die assembly process can be realized more easily, and the processing progress is ensured. And the end face of the lower molding part 2 stretches into the upper barrel part 5, and the upper barrel part 5 applies stress to the lower molding part 2 and the upper molding part 1, so that the lower molding part 2 is prevented from expanding outwards in the extrusion process.
The upper cylinder 5 is sleeved with a base 7, the base 7 is fixedly connected with the upper cylinder 5, and the bottom surface of the base 7 is flush with the bottom surface of the upper cylinder 5. The base 7 will apply stress to the upper tubular member 5, avoiding deformation of the upper tubular member 5 and the upper molding member 1 due to the stress, which deformation is, of course, minute.
The lower barrel part 6 is sleeved with a base 7, the base 7 is fixedly connected with the lower barrel part 6, and the top surface of the base 7 is flush with the top surface of the lower barrel part 6. The base 7 will apply stress to the lower barrel 6, avoiding deformation of the lower barrel 6, the lower profile 2 due to the force, although the deformation is minimal.
The end surface of the upper molding member 1 is in transition with the end surface of the arch portion 1a by an inclined surface, and the end surface of the lower molding member 2 is in transition with the end surface of the recess portion 2a by an inclined surface. The curved surface structure avoids abrasion caused by deviation of coaxiality in the die assembly process of the upper die and the lower die.
The upper die is provided with a through hole 8 for the punch to pass through, and the punch can enter the upper notch 3 to act on the inner star wheel. The upper end face of the inner star wheel to be molded is also provided with a counter bore structure, and the punch is used for molding the counter bore.
The lower die is provided with a through hole 8 for the punch to pass through, and the punch can enter the lower notch 4 to act on the inner star wheel. The lower end face of the inner star wheel to be molded is also provided with a counter bore structure, and the punch is used for molding the counter bore.
As shown in fig. 5, the second embodiment of the present invention has the same structure as the first embodiment, and the difference structure is that the end face of the upper molding member 1 extends out of the upper cylinder member 5, the end face of the lower molding member 2 is located in the lower cylinder member 6, the upper cylinder member 5 is attached to the lower cylinder member 6, and then the end face of the upper molding member 1 extends into the lower cylinder member 6, and the end face of the upper molding member 1 is attached to the end face of the lower molding member 2. The structural design of the second embodiment is the same as that of the first embodiment in principle, and the difference is only that the upper molding member 1 extends out of the upper cylinder member 5 or that the lower molding member 2 extends out of the lower cylinder member 6.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description of the invention that follows may be better understood, and in order that the present invention may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010201178.8A CN111266463B (en) | 2020-03-20 | 2020-03-20 | New inner star wheel forming die structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010201178.8A CN111266463B (en) | 2020-03-20 | 2020-03-20 | New inner star wheel forming die structure |
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| Publication Number | Publication Date |
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| CN111266463A CN111266463A (en) | 2020-06-12 |
| CN111266463B true CN111266463B (en) | 2025-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010201178.8A Active CN111266463B (en) | 2020-03-20 | 2020-03-20 | New inner star wheel forming die structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115815423A (en) * | 2022-10-31 | 2023-03-21 | 江苏理研科技股份有限公司 | Split type preforming mould |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212310597U (en) * | 2020-03-20 | 2021-01-08 | 山中合金（宁波）有限公司 | Novel inner star wheel forming die structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000042678A (en) * | 1998-07-24 | 2000-02-15 | Toyota Motor Corp | Cold forging die |
| CN101680490B (en) * | 2007-06-04 | 2013-10-23 | Ntn株式会社 | Fixed constant velocity universal joint and method of producing outer ring of joint |
| CN201720382U (en) * | 2010-07-26 | 2011-01-26 | 上海爱知锻造有限公司 | Mold cavity for forging inner and outer star wheels |
| CN106111863A (en) * | 2016-07-11 | 2016-11-16 | 上海纳铁福传动系统有限公司 | The processing method of a kind of forging and forging mold thereof |
| CN106694789B (en) * | 2017-02-21 | 2019-12-10 | 上海交大中京锻压有限公司 | die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft |
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- 2020-03-20 CN CN202010201178.8A patent/CN111266463B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212310597U (en) * | 2020-03-20 | 2021-01-08 | 山中合金（宁波）有限公司 | Novel inner star wheel forming die structure |
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