CN211866375U

CN211866375U - Rolling mould for tubeless wheel rim

Info

Publication number: CN211866375U
Application number: CN202020286861.1U
Authority: CN
Inventors: 袁浩
Original assignee: Xiamen Sunrise Group Co ltd
Current assignee: Xiamen Sunrise Group Co ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-11-06
Anticipated expiration: 2030-03-10

Abstract

The utility model discloses a rolling die of tubeless wheel rim, including the last section mould of rolling and the section mould of rolling down. The middle part of the upper rolling die is provided with a wheel rim outer side surface trapezoidal groove forming part formed by protruding towards the direction far away from the axial line of the upper rolling die, the inner side of the wheel rim outer side surface trapezoidal groove forming part is provided with a first inclined plane used for forming a wheel rim welding surface, and an acute angle included angle between the first inclined plane and the axial line of the upper rolling die is 2-4 degrees. The middle part of the lower rolling mould is provided with a wheel rim inner side surface trapezoidal groove forming part formed by sinking towards the axial direction of the lower rolling mould, and the wheel rim inner side surface trapezoidal groove forming part is provided with a second inclined surface parallel to the first inclined surface at the position corresponding to the first inclined surface. The utility model provides a type of rolling mould of tubeless wheel rim matches rim mould tank bottom angle according to spoke shaping resilience angle, reaches perfect laminating, increases the effective combination area of rim and spoke, promotes wheel hub's bulk strength and security, extension wheel hub's life.

Description

Rolling mould for tubeless wheel rim

Technical Field

The utility model relates to a wheel rim shaping technical field, in particular to type of rolling mould of tubeless wheel rim.

Background

The steel wheel is synthesized by rim and spoke through combination welding, wherein the joint area of the combination welding surface of the spoke and the rim is related to the effective connection of the synthesis welding seam, the whole service life of the wheel and the safety of the vehicle. At present, a part of spoke forming is completed by a stamping and stretching process, a stamping die is convenient for demoulding and generally has certain clearance, and certain resilience is generated in the forming process due to the tensile strength of steel. As shown in fig. 1 and 2, after the spoke 300 is formed by stamping and stretching, an acute angle is formed between the spoke welding surface 301 which is originally parallel to the axis and the spoke axis due to outward springback, and when the spoke 300 and the rim 400 are press-fit welded, perfect fit cannot be realized due to a gap between the spoke welding surface 301 and the rim welding surface 401, so that the strength and the safety of the hub cannot reach the best. The phenomenon is a common phenomenon in the stamping industry, if the problem of spoke resilience is to be solved, the process needs to be completed through a large number of equipment and dies, and the manufacturing cost and the manufacturing difficulty of products are greatly increased.

Disclosure of Invention

In view of the above problem, an object of the utility model is to provide a rolling die utensil of tubeless wheel rim utilizes rolling die technology to match rim die tank bottom angle according to spoke shaping resilience angle, has solved among the prior art because of the spoke resilience causes spoke welded surface and rim welded surface to weld the technical problem in clearance each other.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a rolling die for a tubeless wheel rim comprises an upper rolling die and a lower rolling die matched with the upper rolling die. The middle part of the upper rolling die is provided with a wheel rim outer side surface trapezoidal groove forming part formed by protruding towards the direction far away from the axial line of the upper rolling die, the inner side of the wheel rim outer side surface trapezoidal groove forming part is provided with a first inclined surface used for forming a wheel rim welding surface, and an acute angle included angle between the first inclined surface and the axial line of the upper rolling die is 2-4 degrees. The middle part of the lower rolling die is provided with a wheel rim inner side surface trapezoidal groove forming part formed by sinking towards the axial direction of the lower rolling die, and a second inclined surface parallel to the first inclined surface is arranged on the wheel rim inner side surface trapezoidal groove forming part at the position corresponding to the first inclined surface.

Preferably, the acute included angle between the first inclined surface and the axis of the upper roll die is 3 °.

Furthermore, the upper rolling die also comprises a rim outer side surface first flange forming part, a rim outer side surface first mounting surface forming part, a rim outer side surface second mounting surface forming part and a rim outer side surface second flange forming part. The first rim forming part on the outer side surface of the rim, the first mounting surface forming part on the outer side surface of the rim, the trapezoid groove forming part on the outer side surface of the rim, the second mounting surface forming part on the outer side surface of the rim and the second rim forming part on the outer side surface of the rim are sequentially arranged from left to right.

The lower roll forming die further comprises a first rim inner side surface forming part, a first rim inner side surface mounting surface forming part, a second rim inner side surface mounting surface forming part and a second rim inner side surface forming part. The first rim forming part on the inner side surface of the rim, the first mounting surface forming part on the inner side surface of the rim, the trapezoid-shaped groove forming part on the inner side surface of the rim, the second mounting surface forming part on the inner side surface of the rim and the second rim forming part on the inner side surface of the rim are sequentially arranged from left to right.

The utility model discloses following beneficial effect has: the utility model provides a rolling die utensil of tubeless wheel rim utilizes rolling technology to match rim mould tank bottom angle according to spoke shaping resilience angle, reaches perfect laminating, increases the effective combined area of rim and spoke, promotes wheel hub's bulk strength and security, extension wheel hub's life.

Drawings

Fig. 1 is a schematic diagram of the matching of a spoke and a rim in a conventional steel wheel.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic diagram of the cooperation between the rim and the spoke of the rolling type wheel.

Fig. 5 is an enlarged schematic view of a portion B in fig. 4.

Description of the main component symbols: 1. an upper rolling mould; 11. a first rim forming part on the outer side surface of the rim; 12. a rim outer side surface first mounting surface forming part; 13. a trapezoidal groove forming part on the outer side surface of the rim; 131. a first inclined plane; 14. a rim outer side surface second mounting surface forming part; 15. a second rim forming part on the outer side surface of the rim; 2. a lower rolling mould; 21. a first rim forming part on the inner side surface of the rim; 22. a rim inner side surface first mounting surface molding portion; 23. a trapezoidal groove forming part on the inner side surface of the rim; 231. a second inclined plane; 24. a rim inner side surface second mounting surface molding portion; 25. a second rim forming part on the inner side surface of the rim; 300. a spoke; 301. welding surfaces of the spokes; 400. a rim; 401. and (4) a rim welding surface.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 3-5, the rolling mold for the rim of the tubeless wheel comprises an upper rolling mold 1 and a lower rolling mold 2 matched with the upper rolling mold 1.

The upper rolling die 1 includes a rim outer side surface first rim forming portion 11, a rim outer side surface first mounting surface forming portion 12, a rim outer side surface trapezoidal groove forming portion 13, a rim outer side surface second mounting surface forming portion 14, and a rim outer side surface second rim forming portion 15, which are sequentially arranged from left to right. The wheel rim outer side surface trapezoidal groove forming portion 13 protrudes towards the direction far away from the axis of the upper rolling die 1, a first inclined surface 131 used for forming a wheel rim welding surface 401 is arranged on the inner side of the wheel rim outer side surface trapezoidal groove forming portion 13, and an acute included angle between the first inclined surface 131 and the axis of the upper rolling die 1 is 3 degrees.

The lower rolling die 2 includes a rim inner side surface first rim forming portion 21, a rim inner side surface first mounting surface forming portion 22, a rim inner side surface trapezoidal groove forming portion 23, a rim inner side surface second mounting surface forming portion 24, and a rim inner side surface second rim forming portion 25, which are sequentially arranged from left to right. The inner-rim-side trapezoidal groove forming portion 23 is recessed toward the axial direction of the lower roll mold 2, and a second inclined surface 231 parallel to the first inclined surface 131 is provided at a position corresponding to the first inclined surface 131 in the inner-rim-side trapezoidal groove forming portion 23.

The utility model discloses a roll type mould is when shaping rim 400, through mutually supporting of first inclined plane 131 and second inclined plane 231, the shaping goes out a rim face of weld 401 that can laminate with spoke face of weld 301 perfect on rim 400, can increase the effective combined area of rim 400 and spoke 300 when pressing the joining in marriage preparation wheel hub, promotes wheel hub's bulk strength and security, extension wheel hub's life. The hub who produces has reached fine fatigue test effect under original equipment mould input, is suitable for using widely.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a tubeless wheel rim's roll type mould, including last roll type mould and with roll type mould matched with down roll type mould, its characterized in that on roll: the middle part of the upper rolling die is provided with a rim outer side surface trapezoidal groove forming part formed by protruding towards the direction far away from the axial line of the upper rolling die, the inner side of the rim outer side surface trapezoidal groove forming part is provided with a first inclined surface used for forming a rim welding surface, an acute angle included angle between the first inclined surface and the axial line of the upper rolling die is 2-4 degrees, the middle part of the lower rolling die is provided with a rim inner side surface trapezoidal groove forming part formed by sinking towards the axial line direction of the lower rolling die, and the position, corresponding to the first inclined surface, of the rim inner side surface trapezoidal groove forming part is provided with a second inclined surface parallel to the first inclined surface.

2. A rolling die for tubeless wheel rims, according to claim 1, characterized in that: the acute included angle between the first inclined plane and the axis of the upper rolling mould is 3 degrees.

3. A rolling die for tubeless wheel rims, according to claim 1, characterized in that: the upper rolling die further comprises a rim outer side surface first wheel flange forming part, a rim outer side surface first mounting surface forming part, a rim outer side surface second mounting surface forming part and a rim outer side surface second wheel flange forming part, wherein the rim outer side surface first wheel flange forming part, the rim outer side surface first mounting surface forming part, the rim outer side surface trapezoidal groove forming part, the rim outer side surface second mounting surface forming part and the rim outer side surface second wheel flange forming part are sequentially arranged from left to right.

4. A rolling die for tubeless wheel rims, according to claim 1, characterized in that: the lower rolling type die further comprises a first rim forming part on the inner side surface of the rim, a first mounting surface forming part on the inner side surface of the rim, a second mounting surface forming part on the inner side surface of the rim and a second rim forming part on the inner side surface of the rim, wherein the first rim forming part on the inner side surface of the rim, the first mounting surface forming part on the inner side surface of the rim, the trapezoidal groove forming part on the inner side surface of the rim, the second mounting surface forming part on the inner side surface of the rim and the second rim forming part on the inner side surface of the.