Inner and outer spherical cage conjoined forgings and forging dies

Abstract

The invention provides an inner and outer ball cage conjoined forging, the upper end surface of which includes the upper end surface of the outer ball cage, the upper inner wall of the outer ball cage, the upper end surface of the connecting part, the upper outer wall of the inner ball cage, the upper end surface of the inner ball cage, and the lower end surface It includes the lower end surface of the outer ball cage, the lower inner wall of the outer ball cage, the lower end face of the connecting part, and the lower outer wall of the inner ball cage; the forging also includes the central hole of the inner ball cage. The present invention also provides a forging die for manufacturing the forging. The upper die assembly of the die includes a split punch consisting of a punch ring and a punch core. The forming surface of the upper side wall of the center hole of the inner ball cage is formed; the lower die assembly includes a ejector rod and a split die consisting of the outer ring of the die, the middle ring of the die and the inner ring of the die, and the upper end of the split die forms the lower part of the forging. The end face, the forming surface of the outer side wall of the outer cage, and the upper end of the ejector rod form the lower side wall forming surface of the center hole of the inner cage. The invention makes the utilization rate of the raw material of the forging high, and makes the production cost of the inner and outer ball cages low.

Description

technical field [0001] The invention relates to the technical field of manufacturing inner and outer ball cages of a ball cage type mobile universal joint, in particular to an inner and outer ball cage connected forging and a forging mold thereof. Background technique [0002] The ball cage mobile universal joint is an important part of the rear wheel drive of the car, including the inner ball cage and the outer ball cage. The outer diameter of the inner ball cage is smaller than the inner diameter of the outer ball cage. The processing methods of the inner ball cage and the outer ball cage often adopt the forging method. In the past, the forging process of the inner ball cage and the outer ball cage was often carried out independently. Both of them produced a lot of waste during the forging process, and the material consumption was large; and in Before the forging process, the blanks of the outer cage and the inner cage need to be heated separately, resulting in a large ene...

AI Technical Summary

Problems solved by technology

[0003] The outer cage part of the prior art conjoined forging of inner and outer cages is basically formed; restricted by the forging die, the center hole of the inner cage part has not been forged, and the outer wall is also very incomplete. After the forging process, it must be Then the machining process can process the center hole and the outer wall of the inner ball cage, so the production process is complicated, and the production cost of the inner and outer ball cages is high.

Moreover, during the machining process of the center hole and the outer wall of the inner ball cage, a lot of waste will be generated, so the material consumption is large and the material utilization rate is low

However, the die cores of the forging dies of the prior art inner and outer spherical cage conjoined forgings often adopt an integrated structure, the forging forming surface of the only upper die core is the upper end face of the inner and outer spherical cage conjoined forgings, and the only lower die The forging forming surface of the core is the lower end surface of the inner and outer spherical cage conjoined forgings. The forging forming surface of the upper mold core and the forging forming surface of the lower mold core are both stepped surfaces with complex shapes. Local damage to the stepped surface will cause The entire mold core is scrapped, so the service life of the mold is short and the use cost is high

Images