CN217912206U - Cold extrusion die for integrally forming internal and external spline teeth - Google Patents
Cold extrusion die for integrally forming internal and external spline teeth Download PDFInfo
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- CN217912206U CN217912206U CN202221986730.XU CN202221986730U CN217912206U CN 217912206 U CN217912206 U CN 217912206U CN 202221986730 U CN202221986730 U CN 202221986730U CN 217912206 U CN217912206 U CN 217912206U
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Abstract
The utility model discloses a cold extrusion die for internal and external spline tooth integrated into one piece, which comprises an upper die fixing plate and a lower die fixing plate which are oppositely arranged from top to bottom, wherein a position on the bottom surface of the upper die fixing plate and in an upper shaft sleeve is fixedly connected with an extrusion rod which is arranged along the same central line with the upper shaft sleeve, the lower end of the extrusion rod is provided with a forming rod which is protruded along the direction of the central line, and a plurality of internal spline extrusion teeth are protruded on the rod body of the forming rod at uniform intervals along the circumferential direction of the rod body; the top of lower axle bed is provided with the shaping outer hole that sets up with the same central line of extrusion ram, and the internal fixedly connected with shaping piece in the shaping outer hole wears to be equipped with the shaping hole that sets up with the same central line of shaping outer hole on the shaping piece, and it is protruding to be formed with a plurality of external splines extrusion teeth to wind the even interval in shaping hole central line direction on the pore wall of shaping hole. The one-time extrusion forming of the tooth form of the external spline and the tooth form of the internal spline can be realized simultaneously, so that the internal spline and the external spline are integrally formed, and the efficiency is improved.
Description
Technical Field
The utility model relates to a machining's technical field, concretely relates to cold extrusion die for internal and external spline tooth integrated into one piece.
Background
The traditional spline forming process mainly comprises milling, gear broaching, gear shaping and the like, all of which have the defects of low material utilization rate, low production efficiency and the like, cannot meet the requirement of mass production of parts, and particularly has larger and larger demand of spline parts along with the rapid development of industry, particularly the rapid development of automobile industry.
At present, a cold extrusion forming mode is often adopted, the cold extrusion forming is a high-precision, high-efficiency, high-quality and low-consumption moulding forming processing technology, a metal blank is placed into a die cavity in a cold state, and metal is forced to be extruded out of the die cavity under the action of larger pressure and certain speed, so that a workpiece meeting the shape, the size and the mechanical property is obtained.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art exists, the utility model aims to provide an improve machining efficiency's a cold extrusion die who is used for inside and outside spline tooth integrated into one piece.
Solve the technical problem, the utility model discloses a following technical scheme:
a cold extrusion die for integrally forming internal and external spline teeth comprises an upper die fixing plate and a lower die fixing plate which are oppositely arranged up and down, wherein the bottom surface of the upper die fixing plate is fixedly connected with an upper shaft sleeve which is vertically arranged, and the top surface of the lower die fixing plate is fixedly connected with a lower shaft seat which corresponds to the upper shaft sleeve; the top of lower axle bed is provided with the shaping outer bore that sets up with the ejector pin with the central line, the internal fixedly connected with shaping piece in the shaping outer bore, the upper and lower both ends of shaping piece are separated from the drill way and the hole bottom of shaping outer bore respectively and are set up, wear to be equipped with the shaping hole that sets up with the shaping outer bore with the central line on the shaping piece, the diameter of shaping hole is unanimous with the diameter of ejector pin, it has a plurality of external splines extrusion teeth to form around the even interval arch of shaping hole central line direction on the pore wall of shaping hole, when the upper die fixed plate moves down, the ejector pin can insert in the shaping outer bore that is located the shaping piece top along shaping outer bore central line direction rather than sliding fit, and the shaping pole can insert in the shaping hole, the hole bottom of shaping hole is worn to be equipped with the perforation of upper ejector pin along shaping hole central line direction, wear to be equipped with the perforation of lower ejector pin with the same central line and the same diameter of upper ejector pin perforation on the lower die fixed plate, the perforation along its central line direction sliding fit has the ejector pin that is used for ejecting finished piece in the perforation.
According to the scheme, a tubular blank is placed in a forming outer hole, when an upper die fixing plate moves downwards, an extrusion rod can be inserted into the forming outer hole above a forming block and is in sliding fit with the forming outer hole along the direction of the central line of the forming outer hole, the diameter of the forming rod is smaller than that of the extrusion rod, therefore, when the extrusion rod is in sliding fit along the direction of the central line of the forming outer hole, the lower surface of the extrusion rod can push the tubular blank to enter the forming inner hole of the forming block, in the process of pushing the tubular blank to move, the forming inner hole is smaller than that of the forming outer hole, the outer surface of the tubular blank is stressed to enable the blank to move towards inner spline extrusion teeth of the forming rod, and meanwhile, in the process of inserting the forming rod into the forming inner hole, the outer surface of the tubular blank is extruded by the outer spline extrusion teeth, so that an inner spline and an outer spline are formed on the outer surface of the tubular blank simultaneously in the extrusion process to obtain a finished piece; and the part is positioned in the forming inner hole after being formed, and is ejected out along the path of the lower ejector rod through hole and the upper ejector rod through hole by the ejector rod.
Further, the shaping outer hole includes the feeding section that sets up with the central line and is located the ejection of compact section of feeding section below, and the diameter of ejection of compact section is greater than the diameter of feeding section, and the feeding section is located and is formed with a plurality of spacing external splines around the even interval arch of feeding section central line direction on the pore wall of its lower extreme, the shaping piece is for following feeding section central line direction and feeding section sliding fit's cylindric structure, the shaping piece is located winds on the surface of its lower extreme the shaping piece central line direction is evenly spaced concavely and is equipped with a plurality of spacing internal splines, the shaping piece passes through spacing internal spline meshing in spacing external spline department, the lower extreme of shaping piece stretches into in ejection of compact section.
Design like this, spacing internal spline through the shaping piece cooperatees with the spacing external spline of feeding section, make the shaping piece can fixed connection in the shaping outer hole, and simultaneously, the feeding section that the shaping outer hole set up is used for placing the tubulose blank, and the diameter that goes out the material section is greater than the diameter of feeding section, the diameter that realizes out the material section promptly is greater than the fenestrate diameter of last ejector pin in shaping hole, make the tubulose blank extrusion after fall into out the material section, can not produce the extrusion to tubulose blank goods again, guarantee the integrality of goods.
Furthermore, the bottom surface of the upper die fixing plate is vertically and fixedly connected with a guide sleeve on one side of the upper shaft sleeve, the top surface of the lower die fixing plate is fixedly connected with a guide pillar which is concentric with the guide sleeve and corresponds to the guide sleeve, and when the upper die fixing plate moves downwards, the guide pillar can be inserted into the guide sleeve and can be in sliding fit with the guide sleeve along the direction of the central line of the guide sleeve.
In the process that the upper die fixing plate moves downwards, the guide sleeve of the upper die fixing plate moves towards the direction of the guide pillar, and the guide pillar can be inserted into the guide sleeve, so that the guide effect on the upper die fixing plate is achieved through the relation between the guide sleeve and the guide pillar.
Furthermore, the bottom surface of the upper die fixing plate is detachably connected with a base plate, and the top of the upper shaft sleeve is detachably connected to the bottom surface of the base plate.
Design like this, play through the backing plate and link up fixed die plate and upper shaft cover, fixed die plate drives the upper shaft cover and reciprocates.
Compared with the prior art, the utility model has the advantages of as follows:
the utility model discloses simple structure, extrude the tooth through outside bellied internal spline on the shaping pole, and the inside bellied external spline extrusion tooth of shaping hole of shaping piece, both cooperate, in extrusion process, the tubulose blank gets into the shaping downthehole along with the shaping pole in the lump, at the inside radial force of the external spline extrusion tooth of shaping hole, let tubulose blank surface atress and extrude and form the external spline profile of tooth, and simultaneously, the internal spline extrusion tooth on the shaping pole receives the inside effort of tubulose blank, its internal spline extrusion tooth produces outside radial force to tubulose blank internal surface, let tubulose blank internal surface atress and extrusion form the internal spline profile of tooth, can realize the disposable extrusion of external spline profile of tooth and internal spline profile of tooth like this simultaneously, make internal and external spline tooth integrated into one piece, and efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of the cold extrusion die for integrally forming the internal spline and the external spline of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged view of fig. 1 at B.
In the figure: the device comprises an upper die fixing plate 1, a lower die fixing plate 2, a guide pillar 3, a guide sleeve 4, a base plate 5, an upper shaft sleeve 6, a forming rod 7, an extrusion rod 8, a discharging section 9, an ejector rod 10, internal spline extrusion teeth 11, a feeding section 12 and a forming inner hole 13.
Detailed Description
The present invention will be described with reference to the accompanying drawings and examples.
In this embodiment: referring to fig. 1 to 3, a cold extrusion die for integrally forming internal and external spline teeth comprises an upper die fixing plate 1 and a lower die fixing plate 2 which are oppositely arranged up and down, wherein a vertically arranged upper shaft sleeve 6 is fixedly connected to the bottom surface of the upper die fixing plate 1, and a lower shaft seat is fixedly connected to the top surface of the lower die fixing plate 2 corresponding to the upper shaft sleeve 6, and is characterized in that an extrusion rod 8 which is arranged on the bottom surface of the upper die fixing plate 1 and in the upper shaft sleeve 6 and has the same central line with the upper shaft sleeve 6 is fixedly connected to the position in the upper shaft sleeve 6, a forming rod 7 is protruded at the lower end of the extrusion rod 8 along the central line direction, the diameter of the forming rod 7 is smaller than that of the extrusion rod 8, and a plurality of internal spline extrusion teeth 11 are protruded on the rod body of the forming rod 7 at uniform intervals along the circumferential direction; the top of the lower shaft seat is provided with a forming outer hole which is arranged with the same central line as the extrusion rod 8, a forming block is fixedly connected in the forming outer hole, the upper end and the lower end of the forming block are respectively arranged at intervals with the orifice and the hole bottom of the forming outer hole, a forming inner hole 13 which is arranged with the same central line as the forming outer hole is arranged on the forming block in a penetrating way, the diameter of the forming inner hole 13 is consistent with that of the extrusion rod 8, a plurality of external spline extrusion teeth are formed on the hole wall of the forming inner hole 13 in a uniformly spaced way in the direction of the central line of the forming inner hole 13, when the upper die fixing plate 1 moves downwards, the extrusion rod 8 can be inserted into the forming outer hole above the forming block and is in sliding fit with the forming outer hole along the direction of the central line of the forming outer hole, the forming rod 7 can be inserted into the forming inner hole 13, the hole bottom of the forming inner hole 13 is provided with an upper ejector rod 10 perforation in a penetrating way along the direction of the central line of the forming inner hole 13, a lower ejector rod 10 perforation way on the fixing plate 2, and a lower ejector rod 10 perforation way which is arranged with the same central line as the upper ejector rod 10 in a sliding fit along the direction of the central line, and a finished piece 10 used for ejecting is arranged in a sliding fit with the upper ejector rod.
The inner surface of the upper shaft sleeve 6 is provided with balls, and when the upper shaft sleeve 6 is matched with the lower shaft seat, the balls of the upper shaft sleeve 6 play a role in reducing friction, so that the service lives of the upper shaft sleeve 6 and the lower shaft seat are prolonged.
According to the scheme, a tubular blank is placed in a forming outer hole, when an upper die fixing plate 1 moves downwards, an extrusion rod 8 can be inserted into the forming outer hole above a forming block and is in sliding fit with the upper die fixing plate along the direction of the central line of the forming outer hole, and the diameter of the forming rod 7 is smaller than that of the extrusion rod 8, so that when the extrusion rod 8 is in sliding fit along the direction of the central line of the forming outer hole, the lower surface of the extrusion rod 8 can push the tubular blank to enter a forming inner hole 13 of the forming block, and in the process of pushing the tubular blank to move, the forming inner hole 13 is smaller than that of the forming outer hole, so that the outer surface of the tubular blank is stressed to enable the blank to move towards inner spline extrusion teeth 11 of the forming rod 7, and meanwhile, in the process of inserting the forming rod 7 into the forming inner hole 13, the outer surface of the tubular blank is extruded by outer spline extrusion teeth, and the outer surface and the inner surface of the tubular blank are simultaneously formed with inner splines to obtain a finished piece in the extruding process; the part is positioned in the forming inner hole 13 after being formed, and the part is ejected out along the path of the perforation of the lower ejector rod 10 and the perforation of the upper ejector rod 10 through the ejector rod 10.
As preferred, the shaping outer bore includes the feed segment 12 that sets up with the central line and is located the ejection of compact section 9 of feed segment 12 below, the diameter of ejection of compact section 9 is greater than the diameter of feed segment 12, feed segment 12 is located on the pore wall of its lower extreme and is formed with a plurality of spacing external splines around the even interval arch of feed segment 12 central line direction, the shaping piece is for can following feed segment 12 central line direction and the 12 sliding fit's of feed segment cylindric structure, the shaping piece is located the even interval concave a plurality of spacing internal splines in shaping piece central line direction on the surface of its lower extreme, the shaping piece passes through spacing internal spline meshing in spacing external spline department, the lower extreme of shaping piece stretches into in ejection of compact section 9.
Design like this, spacing internal spline through the shaping piece cooperatees with the spacing external spline of feeding section 12, make the shaping piece can fixed connection in the shaping outer hole, and simultaneously, the feeding section 12 that the shaping outer hole set up is used for placing the tubulose blank, and the diameter of ejection of compact section 9 is greater than the diameter of feeding section 12, the diameter that realizes ejection of compact section 9 promptly is greater than the fenestrate diameter of last ejector pin 10 of shaping hole 13, make the tubulose blank extrusion back fall into ejection of compact section 9, can not produce the extrusion to tubulose blank goods again, guarantee the integrality of goods.
Preferably, the bottom surface of the upper die fixing plate 1 is vertically and fixedly connected with a guide sleeve 4 on one side of the upper shaft sleeve 6, the top surface of the lower die fixing plate 2 is fixedly connected with a guide pillar 3 which is concentric with the guide sleeve 4 and corresponds to the position of the guide sleeve 4, and when the upper die fixing plate 1 moves downwards, the guide pillar 3 can be inserted into the guide sleeve 4 and can be in sliding fit with the guide sleeve 4 along the direction of the center line of the guide sleeve 4.
In the process that the upper die fixing plate 1 moves downwards, the guide sleeve 4 of the upper die fixing plate 1 moves towards the guide pillar 3, and the guide pillar 3 can be inserted into the guide sleeve 4, so that the guide effect on the upper die fixing plate 1 is achieved through the relation between the guide sleeve 4 and the guide pillar 3.
Preferably, the bottom surface of the upper die fixing plate 1 is detachably connected with a backing plate 5, and the top of the upper shaft sleeve 6 is detachably connected with the bottom surface of the backing plate 5.
Design like this, play through backing plate 5 and link up fixed die plate 1 and upper shaft cover 6, fixed die plate 1 drives upper shaft cover 6 and reciprocates.
The utility model discloses simple structure, extrude tooth 11 through outside bellied internal spline on shaping pole 7, and the shaping hole 13 of shaping piece inside bellied external spline extrudees the tooth, both cooperate, in extrusion process, the tubulose blank gets into in the shaping hole 13 along with shaping pole 7 in the lump, at the inside radial force of the external spline extrusion tooth of shaping hole 13, let tubulose blank surface atress and extrude and form the external spline profile of tooth, and simultaneously, internal spline extrusion tooth 11 on the shaping pole 7 receives the inside effort of tubulose blank, its internal spline extrusion tooth produces outside radial force to tubulose blank internal surface, let tubulose blank internal surface atress and extrude and form the internal spline profile of tooth, can realize the disposable extrusion of external spline profile of tooth and internal spline profile of tooth like this simultaneously, make internal and external spline tooth integrated into one piece, the efficiency is improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.
Claims (4)
1. A cold extrusion die for integrally forming internal and external spline teeth comprises an upper die fixing plate (1) and a lower die fixing plate (2) which are oppositely arranged from top to bottom, wherein an upper shaft sleeve (6) which is vertically arranged is fixedly connected onto the bottom surface of the upper die fixing plate (1), and a lower shaft seat which is fixedly connected onto the top surface of the lower die fixing plate (2) and corresponds to the upper shaft sleeve (6) is fixedly connected onto the bottom surface of the upper die fixing plate (1) and is positioned in the upper shaft sleeve (6), an extrusion rod (8) which is arranged at the same central line with the upper shaft sleeve (6) is fixedly connected onto the bottom surface of the upper die fixing plate, a forming rod (7) protrudes along the direction of the central line of the lower end of the extrusion rod (8), the diameter of the forming rod (7) is smaller than that of the extrusion rod (8), and a plurality of internal spline extrusion teeth (11) protrude on the rod body of the forming rod (7) at uniform intervals along the circumferential direction of the forming rod; the top of lower axle bed is provided with the shaping outer bore that sets up with the shared line of extrusion pole (8), the internal fixedly connected with shaping piece in the shaping outer bore, the upper and lower both ends of shaping piece set up with the drill way and the hole bottom of shaping outer bore at a distance from respectively, wear to be equipped with shaping hole (13) with the coaxial line setting of shaping outer bore on the shaping piece, the diameter of shaping hole (13) is unanimous with the diameter of extrusion pole (8), it is protruding to form a plurality of external splines extrusion teeth along the even interval of shaping hole (13) central line direction on the pore wall of shaping hole (13), when cope match-plate pattern fixed plate (1) moves down, extrusion pole (8) can insert in the shaping outer bore that is located the shaping piece top along shaping outer bore central line direction rather than sliding fit, and shaping pole (7) can insert in shaping hole (13), the hole bottom of shaping hole (13) is worn to be equipped with upper ejector pin (10) perforation along shaping hole (13) central line direction, wear to be equipped with punch hole (10) perforation on the lower mould fixed plate (2) with punch hole (10) and the same central line and punch hole and be used for the ejector pin (10) central line cooperation.
2. The cold extrusion die for integrally forming the internal and external spline teeth according to claim 1, wherein the outer forming hole comprises a feeding section (12) and a discharging section (9), the feeding section (12) is arranged on the same center line, the discharging section (9) is located below the feeding section (12), the diameter of the discharging section (9) is larger than that of the feeding section (12), a plurality of limiting external splines are formed on a hole wall of the lower end of the feeding section (12) at uniform intervals and protrude around the center line direction of the feeding section (12), the forming block is a cylindrical structure capable of being in sliding fit with the feeding section (12) along the center line direction of the feeding section (12), a plurality of limiting internal splines are concavely arranged on the outer surface of the lower end of the forming block at uniform intervals around the center line direction of the forming block, the forming block is engaged at the limiting external splines through the limiting internal splines, and the lower end of the forming block extends into the discharging section (9).
3. The cold extrusion die for integrally forming the internal and external spline teeth according to claim 1, wherein a guide sleeve (4) is fixedly connected to the bottom surface of the upper die fixing plate (1) and is located on one side of the upper shaft sleeve (6) in a vertical direction, a guide pillar (3) which is concentric with the guide sleeve (4) is fixedly connected to the top surface of the lower die fixing plate (2) and corresponds to the guide sleeve (4), and when the upper die fixing plate (1) moves downwards, the guide pillar (3) can be inserted into the guide sleeve (4) and can be in sliding fit with the guide sleeve (4) along the direction of the center line of the guide sleeve (4).
4. A cold extrusion die for integral molding of internal and external spline teeth as claimed in claim 1, wherein the bottom surface of the upper die fixing plate (1) is detachably connected with a backing plate (5), and the top of the upper shaft sleeve (6) is detachably connected to the bottom surface of the backing plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221986730.XU CN217912206U (en) | 2022-07-29 | 2022-07-29 | Cold extrusion die for integrally forming internal and external spline teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221986730.XU CN217912206U (en) | 2022-07-29 | 2022-07-29 | Cold extrusion die for integrally forming internal and external spline teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217912206U true CN217912206U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221986730.XU Active CN217912206U (en) | 2022-07-29 | 2022-07-29 | Cold extrusion die for integrally forming internal and external spline teeth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217912206U (en) |
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2022
- 2022-07-29 CN CN202221986730.XU patent/CN217912206U/en active Active
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