CN209953526U

CN209953526U - High-precision forming die frame of output gear

Info

Publication number: CN209953526U
Application number: CN201920214216.6U
Authority: CN
Inventors: 王新民; 邓新海; 宣志强
Original assignee: Jiangsu Shenli Gear Cold Extrusion Co Ltd
Current assignee: Jiangsu Shenli Gear Cold Extrusion Co Ltd
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2020-01-17
Anticipated expiration: 2029-02-19

Abstract

The utility model provides a high-precision forming die frame of an output gear, which comprises an upper die base and a lower die base, wherein the bottom wall of the upper die base is provided with a guide sleeve, and the lower die base is provided with a guide pillar which can be inserted into the guide sleeve; the guide pillar comprises a pillar body and a copper sheath, the top of the pillar body is provided with a threaded pillar, and the copper sheath is in threaded connection with the threaded pillar; the threaded column is provided with a first mounting hole which penetrates through the threaded column along the radial direction, the copper sheath is provided with a second mounting hole matched with the first mounting hole and a countersunk head screw groove communicated with the second mounting hole along the radial direction, the countersunk head screw groove is recessed into the outer side wall of the copper sheath, the countersunk head screw is connected with the first mounting hole and the second mounting hole, and the head of the countersunk head screw is sunk into the countersunk head screw groove. The utility model discloses a difficult wearing and tearing of guide pillar can guarantee to still have higher direction precision after long-term the use, guarantees the shaping quality of gear.

Description

High-precision forming die frame of output gear

Technical Field

The utility model belongs to the technical field of the cold extrusion mold processing of gear, concretely relates to high accuracy shaping die carrier of output gear.

Background

The output gear is an important part in a reducer product, has the characteristics of flexible and reliable transmission and compact structure, the small-sized output gear can be formed by cold extrusion through a die, and the die frame of the cold extrusion die can accurately guide the stamping process of an upper die through a guide pillar and a guide sleeve which are matched with each other so as to ensure the high-precision requirement of the product. The guide pillar can appear wearing and tearing phenomenon after thousands of friction with the guide pin bushing, leads to the direction of guide pillar to appear the deviation, and the compound die precision descends, and then has influenced the machining precision of gear.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high accuracy forming die carrier of output gear, the difficult wearing and tearing of guide pillar of this forming die carrier can guarantee still to have higher direction precision after using for a long time, guarantees the shaping quality of gear.

The utility model provides a following technical scheme:

a high-precision forming die set for an output gear comprises an upper die base and a lower die base, wherein a gear forming upper die is mounted on the upper die base, a gear forming lower die matched with the gear forming upper die is mounted on the lower die base, a guide sleeve is mounted on the bottom wall of the upper die base, and a guide pillar capable of being inserted into the guide sleeve is mounted on the lower die base; the guide pillar comprises a pillar body and a copper sheath, the top of the pillar body is provided with a threaded pillar, the inner wall of the copper sheath is provided with an internal thread matched with the threaded pillar, and the copper sheath is in threaded connection with the threaded pillar; the threaded column is provided with a first mounting hole which penetrates through the threaded column along the radial direction, the copper sheath is provided with a second mounting hole matched with the first mounting hole and a countersunk head screw groove communicated with the second mounting hole along the radial direction, the countersunk head screw groove is recessed into the outer side wall of the copper sheath, the countersunk head screw is connected with the first mounting hole and the second mounting hole, and the head of the countersunk head screw is sunk into the countersunk head screw groove.

Preferably, the top of the copper sheath is provided with a tapered guide part, the included angle between the side wall of the guide part and the horizontal line is 85-88 degrees, and the joint of the side wall of the guide part and the top wall of the copper sheath is of a fillet structure.

Preferably, a plurality of annular lubricating oil grooves are formed in the outer circumferences of the copper sheath and the column body.

Preferably, the outer part of the guide pillar is sleeved with a compression spring, the lower end of the compression spring is fixed on the lower die base, and the upper end of the compression spring is pressed against the bottom of the guide sleeve.

Preferably, the outer diameter of the copper sheath is equal to the outer diameter of the post body.

The utility model has the advantages that: the copper sheath is arranged at the top of the guide post, has good cutting performance and wear resistance, and can absorb the impact force of the guide sleeve on the guide post, so that the guide deviation caused by abrasion is not easy to occur, the matching precision of the guide post and the guide sleeve is ensured, and the forming quality of the gear is further improved; the copper sheath also has good heat dissipation, can give off the heat that guide pillar and guide pin bushing high frequency friction produced fast, avoids influencing cold extrusion forming's stability because of die carrier cohesion heat collection. The copper sheath is in threaded connection with the column body, so that the copper sheath with the service life prolonged is convenient to replace; the copper sheath and the column body are also radially connected through the countersunk head screw, so that after long-term vibration is prevented, the copper sheath is separated from the column body due to loosening of threads between the copper sheath and the column body, and the working stability and reliability of the guide column are improved. The head of the countersunk head screw sinks into the countersunk head screw groove and cannot protrude out of the outer wall of the copper sheath, so that the countersunk head screw cannot interfere with the guide sleeve.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the copper sheath of the present invention before being mounted on the column body;

fig. 3 is a schematic sectional view of the copper sheath of the present invention along the direction a-a in fig. 2.

Labeled as: 1. an upper die holder; 2. a lower die holder; 3. an upper gear forming die; 4. a gear molding lower die; 5. a guide sleeve; 6. a post body; 7. a copper sheath; 8. a threaded post; 9. a first mounting hole; 10. a second mounting hole; 11. countersunk screw grooves; 12. a guide section; 13. a lubricating oil groove; 14. compressing the spring.

Detailed Description

As shown in fig. 1 to 3, a high-precision forming die set for an output gear comprises an upper die base 1 and a lower die base 2, wherein an upper gear forming die 3 is installed on the upper die base 1, a lower gear forming die 4 matched with the upper gear forming die 3 is installed on the lower die base 2, and the upper gear forming die 3 is pressed by a high-tonnage forming machine and then matched with the lower gear forming die 4 to extrude a blank on the lower die base 2 to form the gear. The bottom wall of the upper die holder 1 is provided with a guide sleeve 5, the lower die holder 2 is provided with a guide pillar which can be inserted into the guide sleeve 5, and the guide pillar and the guide sleeve play a role in accurately guiding the matched die; the guide pillar comprises a pillar body 6 and a copper sheath 7, the pillar body 6 is made of GCr15, the copper sheath 7 is made of copper-zinc alloy, a threaded pillar 8 is turned on the top of the pillar body 6, internal threads matched with the threaded pillar 8 are arranged on the inner wall of the copper sheath 7, and the copper sheath 7 is in threaded connection with the threaded pillar 8, so that the copper sheath 7 is convenient to disassemble and replace; the threaded column 8 is provided with a first mounting hole 9 which penetrates through the threaded column 8 along the radial direction, the copper sheath 7 is provided with a second mounting hole 10 matched with the first mounting hole 9 and a countersunk screw groove 11 communicated with the second mounting hole 10 along the radial direction, the countersunk screw groove 11 is recessed into the outer side wall of the copper sheath 7, the countersunk screw is connected with the first mounting hole 9 and the second mounting hole 10, and the head of the countersunk screw is sunk into the countersunk screw groove 11. The countersunk head screw can fix the copper sheath 7 and the column body 6 in the radial direction, so that the copper sheath 7 and the column body 6 are prevented from being connected and loosened; the head of the countersunk head screw sinks into the countersunk head screw groove 11 and does not protrude out of the outer wall of the copper sheath 7, so that interference between the countersunk head screw and the guide sleeve 5 is avoided.

As shown in fig. 2 and 3, a tapered guide portion 12 is arranged at the top of the copper sheath 7, an included angle between the side wall of the guide portion 12 and the horizontal plane is 85-88 °, and a junction between the side wall of the guide portion 12 and the top wall of the copper sheath 7 is in a rounded structure. The guide part 12 and the fillet structure at the top of the copper sheath facilitate the copper sheath 7 to accurately enter the guide sleeve 5, reduce the friction and interference between the copper sheath 7 and the guide sleeve 5, ensure the processing precision and prolong the service life of the copper sheath 7.

A plurality of annular lubricating oil grooves 13 are formed in the outer circumferences of the copper sheath 7 and the column body 6, and lubricating oil is injected into the lubricating oil grooves 13. The friction between the guide pillar and the guide sleeve is reduced, and the service life of the guide pillar is prolonged.

As shown in figure 1, a compression spring 14 is sleeved outside the guide post, the lower end of the compression spring 14 is fixed on the lower die holder 2, and the upper end of the compression spring 14 is pressed against the bottom of the guide sleeve 5. The compression spring 14 can be compressed and deformed by the extrusion of the guide sleeve 5, and after the product is formed, the compression spring 14 applies reverse acting force to the guide sleeve 5, so that the rapid die parting is convenient.

The outer diameter of the copper sheath 7 is equal to the outer diameter of the column body 6, so that the whole outer diameter of the guide column is kept consistent, and the compression spring 14 can be conveniently and smoothly stretched along the guide column.

When the guide pillar is installed, the bottom of the pillar body 6 is welded or connected onto the lower die base 2 through a bolt, the copper sheath 7 is screwed on the threaded pillar 8 at the top of the pillar body 6, and then the countersunk head screw is screwed into the first mounting hole 9 and the second mounting hole 10, so that the copper sheath 7 is fixedly connected with the pillar body 6. The compression spring 14 is then placed over the guide post and welded at its bottom to the lower die bed 2. When the gear is machined, the guide part 12 at the top of the copper sheath 7 guides the copper sheath 7 into the guide sleeve 5 along the field, so that the phenomenon that the copper sheath 7 interferes with the guide sleeve 5 due to the vibration of the die holder is avoided; the lubricating oil groove 13 on the side wall of the guide post lubricates the surface of the guide post, and the wear resistance of the guide post is improved. When the copper sheath 7 is worn by long-term use, it is detached from the column body 6 and replaced with a new one.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The high-precision forming die set for the output gear is characterized by comprising an upper die base and a lower die base, wherein the upper die base is provided with an upper gear forming die, and the lower die base is provided with a lower gear forming die matched with the upper gear forming die; a guide sleeve is arranged on the bottom wall of the upper die holder, and a guide pillar capable of being inserted into the guide sleeve is arranged on the lower die holder; the guide pillar comprises a pillar body and a copper sheath, the top of the pillar body is provided with a threaded pillar, the inner wall of the copper sheath is provided with an internal thread matched with the threaded pillar, and the copper sheath is in threaded connection with the threaded pillar; the copper sheath is provided with a first mounting hole which penetrates through the threaded column along the radial direction, a second mounting hole which is matched with the first mounting hole and a countersunk head screw groove which is communicated with the second mounting hole are arranged on the copper sheath along the radial direction, the countersunk head screw groove is recessed into the outer side wall of the copper sheath, the countersunk head screw is connected with the first mounting hole and the second mounting hole, and the head of the countersunk head screw is sunk into the countersunk head screw groove.

2. The high-precision forming die holder for the output gear is characterized in that a tapered guide part is arranged at the top of the copper sheath, the included angle between the side wall of the guide part and the horizontal line is 85-88 degrees, and the joint of the side wall of the guide part and the top wall of the copper sheath is of a fillet structure.

3. The high-precision forming die set for the output gear according to claim 2, wherein a plurality of annular lubricating oil grooves are formed in the outer circumferences of the copper sheath and the column body.

4. The high-precision forming die set for the output gear according to claim 3, wherein a compression spring is sleeved outside the guide post, the lower end of the compression spring is fixed on the lower die base, and the upper end of the compression spring can abut against the bottom of the guide sleeve after being extruded.

5. The high-precision forming die set for the output gear according to claim 4, wherein the outer diameter of the copper sheath is equal to the outer diameter of the column body.