CN216175412U - Die for cold extrusion molding of straight bevel gear in high-precision motor car brake base - Google Patents
Die for cold extrusion molding of straight bevel gear in high-precision motor car brake base Download PDFInfo
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- CN216175412U CN216175412U CN202122612774.8U CN202122612774U CN216175412U CN 216175412 U CN216175412 U CN 216175412U CN 202122612774 U CN202122612774 U CN 202122612774U CN 216175412 U CN216175412 U CN 216175412U
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Abstract
The utility model discloses a die for cold extrusion molding of a straight bevel gear in a high-precision bullet train brake base, which comprises a die body, wherein the die body is arranged in an oil press machine and comprises an upper die base, a punch and a lower die, the punch is arranged in the upper die base, the bottom of the lower die is connected with a base, and an ejection structure which is more uniform in stress when a part is ejected is arranged in the lower die; the ejection structure is arranged between the lower die and the base, and the ejection structure evenly disperses the force of the large ejector rod to the two small ejector rods through the ejector rod piece. Through the mode, the mold for the cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base adopts the ejection structure with more uniform stress during ejection, can ensure that the straight bevel gear is more uniformly stressed during ejection after one-time extrusion processing is finished, and obviously improves the surface quality of the gear.
Description
Technical Field
The utility model relates to the field of automobile parts, in particular to a die for cold extrusion molding of a straight bevel gear in a high-precision motor car brake base.
Background
In order to ensure that the motor vehicle is braked in normal operation and parking and has as short an emergency braking distance as possible in the event of an accident or other necessary circumstances, high-speed motor vehicles must be equipped with a highly efficient and highly safe braking system.
In the processing process of the traditional bullet train brake base in China, a tooth milling or cutting method is adopted to process the straight bevel gear, when the straight bevel gear is directly milled by the tooth milling method, the processing time is long, the production efficiency is low, a large amount of burrs can be generated in the processing process, the burrs exist in an inner hole and can be removed only manually, time and labor are wasted, the reject ratio is high, the finishing precision is low, the mass production state is difficult to meet, when the traditional cutting method is adopted to process the straight bevel gear, fibers of a tooth-shaped part are cut off by a broach, the strength of the straight bevel gear is reduced, and the bearing capacity of the straight bevel gear is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the technical problem of providing a die for cold extrusion molding of a straight bevel gear in a high-precision bullet train brake base, which can be completed by only one-time extrusion processing when the straight bevel gear is processed.
In order to solve the technical problems, the utility model adopts a technical scheme that: the die comprises a die body, wherein the die body is arranged in an oil press and comprises an upper die base, a punch and a lower die, the punch is arranged in the upper die base, the bottom of the lower die is connected with the base, and an ejection structure which is more uniform in stress when a part is ejected is arranged in the lower die;
the ejection structure is arranged between the lower die and the base, and the ejection structure evenly disperses the force of the large ejector rod to the two small ejector rods through the ejector rod piece.
In a preferred embodiment of the present invention, the top rod is placed in a sliding groove on the base and is connected with the front of the sliding groove in a sliding manner.
In a preferred embodiment of the utility model, the small end of the large ejector rod is arranged on the ejector rod piece in an interference fit mode, the large end of the large ejector rod passes through the middle large hole of the base in a clearance fit mode, and the bottom of the large ejector rod is connected with a lower ejector rod arranged on an ejection cylinder in the oil press in the large hole.
In a preferred embodiment of the utility model, the small end of the small ejector rod is arranged on the ejector rod piece in an interference fit mode, and the large end of the small ejector rod passes through the small holes in the two sides of the lower die in a clearance fit mode.
In a preferred embodiment of the present invention, the lower mold is provided with a positioning hole, a positioning column is installed in the positioning hole, and the top of the positioning column is exposed out of the positioning groove at the top of the lower mold.
In a preferred embodiment of the utility model, the bottom of the positioning column is provided with a radian.
In a preferred embodiment of the present invention, the diameter of the top of the positioning post is larger than the width of the sliding groove.
In a preferred embodiment of the present invention, the upper die base, the lower die and the base are connected by a mandrel.
The utility model has the beneficial effects that: the mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base adopts the ejection structure with more uniform stress during ejection, can ensure that the straight bevel gear is more uniformly stressed during ejection after one-time extrusion processing is finished, obviously improves the surface quality of the gear, adopts extrusion to replace the traditional processing method, greatly saves materials, greatly improves the production efficiency, and thus achieves the purpose of reducing the production cost of products.
Drawings
FIG. 1 is a schematic structural diagram of a die for cold extrusion molding of a straight bevel gear in a high-precision bullet train brake base according to the utility model;
FIG. 2 is a bottom view of a die punch for cold extrusion molding of straight bevel gears in a high precision bullet train brake base according to the present invention;
FIG. 3 is a front view of a mold locating post for cold extrusion molding of a straight bevel gear in a high precision bullet train brake base according to the present invention;
FIG. 4 is a perspective view of a lower die of the die for cold extrusion molding of a straight bevel gear in a high-precision motor car brake base according to the present invention;
FIG. 5 is a perspective view of a mold ejector pin member for cold extrusion molding of a straight bevel gear in a high precision bullet train brake spider according to the present invention;
FIG. 6 is a perspective view of a die base for cold extrusion molding of straight bevel gears in a high precision bullet train brake base according to the present invention;
the parts in the drawings are numbered as follows: 1. an upper die holder; 2. a punch; 3. a lower die; 4. a positioning column; 5. a large ejector rod; 6. a small ejector rod; 7. a lower ejector rod; 8. a core rod; 9. a ejector pin member; 10. a base; 11. positioning holes; 12. a chute; 13. and (6) positioning a groove.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.
Referring to fig. 1 to 6, an embodiment of the present invention includes:
the utility model provides a cold extrusion moulding's of straight-tooth bevel gear mould in high accuracy motor car brake base, includes a mould body, the mould body is installed in the hydraulic press, the mould body includes upper die base 1, drift 2 and lower mould 3, drift 2 is installed in the upper die base 1, drift 2 passes through the bolt fastening in the counter bore of upper die base 1 for the retooling time shortens, is convenient for the dismouting of drift 2, 2 size precision of drift are very high, in order to guarantee part size precision.
The upper die holder 1 is arranged on an upper base plate of the 200-ton oil press, and the upper die holder 1 is tightly pressed on the upper base plate through a pin hole on the upper die holder and a blank holder, so that the upper die holder is prevented from being displaced by huge pressure during working.
The bottom of the lower die 3 is connected with a base 10, the base 10 is installed in a lower die 3 cylinder, the excircle through the maximum diameter department with a lower die 3 cylinder carries out clearance fit, the base 10 is used for installing and fixing the ejector pin member 9 to prevent it from producing the displacement when receiving pressure.
The upper die base 1, the lower die 3 and the base 10 are connected through the core rods 8, 2 core rods 8 are installed on the whole set of die, the coaxiality of the upper die base 1, the lower die 3 and the base 10 is guaranteed through the core rods 8, and meanwhile displacement caused by stress during extrusion is avoided.
The lower die 3 is internally provided with an ejection structure which is more uniform in stress when ejecting parts, the ejection structure can enable the straight bevel gear to be more uniform in stress when ejected after one-time extrusion processing of the straight bevel gear is completed, the surface quality of the gear is remarkably improved, the extrusion is adopted to replace a traditional processing method, materials are greatly saved, the production efficiency is greatly improved, and the purpose of reducing the production cost of the product is achieved.
The ejection structure is arranged between the lower die 3 and the base 10, and the ejection structure evenly disperses the force of the large ejector rods 5 to the two small ejector rods 6 through the ejector rod pieces 9, so that the stress on parts is more evenly balanced during ejection, and the surface quality of the gear is improved.
The ejector rod piece 9 is placed in a sliding groove 12 on the base 10 and is in sliding connection with the sliding groove 12, and the sliding groove 12 plays a role in limiting and guiding the ejector rod piece 9, so that the ejector rod piece 9 can slide up and down in the sliding groove 12.
The small end of the large ejector rod 5 is arranged on the ejector rod piece 9 in an interference fit mode, and the large end of the large ejector rod 5 passes through the middle large hole of the base 10 in a clearance fit mode, so that the large ejector rod 5 can drive the ejector rod piece 9 to move upwards when being pushed upwards.
The bottom of the large ejector rod 5 is connected with a lower ejector rod 7 arranged on an ejector cylinder in the oil press in the large hole, and the lower ejector rod 7 is used for ejecting the part to the large ejector rod 5 after the part is extruded, so that the ejector rod piece 9 is driven to extrude the whole part out of the die through the two small ejector rods 6.
The small end of the small ejector rod 6 is arranged on the ejector rod piece 9 in an interference fit mode, and the large end of the small ejector rod 6 passes through the small holes in the two sides of the lower die 3 in a clearance fit mode, so that the ejector rod piece 9 can drive the lower ejector rod 6 to move upwards when moving upwards.
The lower die is provided with a positioning hole 11, a positioning column 4 is installed in the positioning hole 11, the top of the positioning column 4 is exposed out of a positioning groove 13 in the top of the lower die 3, the bottom of the positioning column 4 is provided with a radian, the radian is used for increasing the contact area and ensuring stable installation, and the positioning column 4 is used for positioning parts.
The diameter of the top of the positioning column 4 is larger than the width of the sliding groove 12, so that the positioning column 4 can be fixed in the positioning hole 11 to prevent the positioning column from sliding off.
Compared with the prior art, the mold for the cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base has the advantages that the mold adopts an ejection structure with more uniform stress during ejection, the straight bevel gear can be more uniformly stressed during ejection after one-time extrusion processing is finished, the surface quality of a gear is remarkably improved, the extrusion is adopted to replace the traditional processing method, the material is greatly saved, the production efficiency is greatly improved, and the purpose of reducing the production cost of the product is achieved.
The mold adopts extrusion to replace the traditional processing method, can meet the extremely high size requirement and form and position tolerance requirement of the straight bevel gear of the brake base of the high-precision motor car, can also improve the strength of the straight bevel gear, ensures the bearing capacity, safety and service life of parts, can not generate burrs during cold extrusion processing, saves the deburring process, and can meet the requirement of mass production.
In the description of the present invention, it should be noted that all the components are general standard components or components known to those skilled in the art, the structure and principle of the components are known to those skilled in the technical manual or by the conventional test method, and the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings or the orientation or position relationship usually placed when the utility model product is used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus cannot be understood as limiting the present invention.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A die for cold extrusion molding of a straight bevel gear in a high-precision motor car brake base comprises a die body, wherein the die body is installed in an oil hydraulic press and comprises an upper die base, a punch and a lower die, the punch is installed in the upper die base, and the bottom of the lower die is connected with the base;
the ejection structure is arranged between the lower die and the base, and the ejection structure evenly disperses the force of the large ejector rod to the two small ejector rods through the ejector rod piece.
2. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 1, wherein: the ejector rod piece is placed in the sliding groove in the base and is in sliding connection with the front of the sliding groove.
3. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 1, wherein: the small end of the large ejector rod is arranged on the ejector rod piece in an interference fit mode, the large end of the large ejector rod passes through the middle large hole of the base in a clearance fit mode, and the bottom of the large ejector rod is connected with a lower ejector rod arranged on an ejection cylinder in the oil press in the large hole.
4. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 1, wherein: the small end of the small ejector rod is arranged on the ejector rod piece in an interference fit mode, and the large end of the small ejector rod passes through the small holes in the two sides of the lower die in a clearance fit mode.
5. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 2, wherein: the lower die is provided with a positioning hole, a positioning column is installed in the positioning hole, and the top of the positioning column is exposed out of the positioning groove in the top of the lower die.
6. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 5, wherein: and the bottom of the positioning column is provided with a radian.
7. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 5, wherein: the diameter of the top of the positioning column is larger than the width of the sliding groove.
8. The mold for cold extrusion molding of the straight bevel gear in the high-precision bullet train brake base according to claim 1, wherein: the upper die base, the lower die and the base are connected through a core rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122612774.8U CN216175412U (en) | 2021-10-28 | 2021-10-28 | Die for cold extrusion molding of straight bevel gear in high-precision motor car brake base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122612774.8U CN216175412U (en) | 2021-10-28 | 2021-10-28 | Die for cold extrusion molding of straight bevel gear in high-precision motor car brake base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216175412U true CN216175412U (en) | 2022-04-05 |
Family
ID=80892585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122612774.8U Active CN216175412U (en) | 2021-10-28 | 2021-10-28 | Die for cold extrusion molding of straight bevel gear in high-precision motor car brake base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216175412U (en) |
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2021
- 2021-10-28 CN CN202122612774.8U patent/CN216175412U/en active Active
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