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BJ type constant velocity universal joint bell shell raceway forming process and its finishing equipment

A constant velocity universal joint and molding process technology, applied in the field of vehicle parts manufacturing, can solve problems such as affecting product performance and life, destroying product material organization streamlines, and limited product processing accuracy, so as to avoid yield strength limitations and cost. Low, friction-reducing effect

Active Publication Date: 2016-03-23
ZHEJIANG ODM TRANSMISSION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing BJ-type constant velocity universal joint bell-shaped shell raceway forming scheme can meet the general forming requirements of the BJ-type constant velocity universal joint bell-shaped shell raceway, but due to the essential characteristics of the scheme, it also reflects its defects: ① The use of milling raceway forming is a processing method for removing materials, which destroys the original structure and streamline of the product material, and directly affects the service performance and life of the product; Milling and grinding molding, many process steps, long processing cycle, low efficiency, high cost; ③Replacing equipment during the bell-shaped shell raceway forming process requires multiple disassembly and clamping of the product, which is labor-intensive and has clamping accuracy errors , the product processing accuracy is limited

Method used

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  • BJ type constant velocity universal joint bell shell raceway forming process and its finishing equipment
  • BJ type constant velocity universal joint bell shell raceway forming process and its finishing equipment
  • BJ type constant velocity universal joint bell shell raceway forming process and its finishing equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A BJ-type constant velocity universal joint bell-shaped shell raceway forming process, the main process steps: blanking - heating - upsetting - warm forging - isothermal spheroidizing annealing - finishing.

[0040] a) Cutting: Use a round steel cutting machine to cut the No. 55 steel bar with a diameter of Φ45mm. The blanking quality tolerance is controlled within ±15g, and the fracture size tolerance is within -4.8mm~0.5mm. The use of round steel cutting machine for blanking has the advantages of flat blanking end surface, high efficiency, and strong controllability of blank size.

[0041] b) Heating: use intermediate frequency heating to make the billet temperature reach 990°C-1050°C.

[0042] c) Upsetting: Upsetting the intermediate frequency heated billet through a mold to remove the surface oxide layer.

[0043]d) Warm forging: rough forging and precision forging are carried out by the rough forging die and precision forging die of the forging equipment in turn,...

Embodiment 2

[0081] A BJ-type constant velocity universal joint bell-shaped shell raceway forming process, the main process steps: blanking - heating - upsetting - warm forging - isothermal spheroidizing annealing - shot blasting - saponification - finishing.

[0082] a), blanking: use a round steel cutting machine to cut the No. 55 steel bar with a diameter of Φ50mm. The blanking quality tolerance is controlled within ±15g, and the fracture size tolerance is within -4.8mm~0.5mm.

[0083] b) Heating: use intermediate frequency heating to make the billet temperature reach 1060°C to 1120°C.

[0084] c) Upsetting: Upsetting the intermediate frequency heated billet through a mold to remove the surface oxide layer.

[0085] d) Warm forging: rough forging and precision forging are carried out by the rough forging die and precision forging die of the forging equipment in turn, and the bell-shaped shell raceway is forged and formed. Warm forging temperature: 930℃~960℃, while the forming resistan...

Embodiment 3

[0095] A BJ-type constant velocity universal joint bell-shaped shell raceway forming process, the main process steps: blanking - heating - upsetting - warm forging - isothermal spheroidizing annealing - shot blasting - saponification - finishing.

[0096] a) Cutting: Use a round steel cutting machine to cut the No. 55 steel bar with a diameter of Φ80mm. The blanking quality tolerance is controlled within ±15g, and the fracture size tolerance is within -4.8mm~0.5mm.

[0097] b) Heating: use intermediate frequency heating to make the billet temperature reach 1090°C to 1210°C.

[0098] c) Upsetting: Upsetting the intermediate frequency heated billet through a mold to remove the surface oxide layer.

[0099] d) Warm forging: rough forging and precision forging are carried out by the rough forging die and precision forging die of the forging equipment in turn, and the bell-shaped shell raceway is forged and formed. Warm forging temperature: 950℃~980℃, while the forming resistance...

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Abstract

The invention relates to a molding process and finishing equipment of a BJ type CVJ (constant velocity universal joint) bell housing raceway, and belongs to the technical field of vehicle part manufacturing. The process comprises the following steps of: a). blanking; b). heating; c). upsetting; d). warm forging; e). isothermal spheroidizing; h), finishing: the molding size and precision of a bell housing blank raceway are controlled by the finishing equipment, and the tension level of a finishing punch is micro-adjusted by a micro adjustment component, so that the circumferential expansion size of the split finishing punch meets preset requirements, the preset size of the finishing punch is locked by a locking device, and then an extrusion device carries out finishing to complete the correction and control of the size and precision of the bell housing raceway. According to the BJ type CVJ bell housing processed by the process flow, the size and precision of the bell housing raceway meet the use needs of conventional products, meanwhile, the streamline distribution of bell housing raceway structure is uniform, and the torque is increased, so that the load transfer capacity of a product is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of vehicle parts manufacturing, and in particular relates to a bell-shaped housing raceway forming process for a BJ-type constant velocity universal joint and finishing equipment thereof. Background technique [0002] BJ type constant velocity universal joint is a center-fixed universal joint device that transmits power at a constant speed and changes the working angle. It is connected with the shaft, and the power is transmitted to the wheel through six steel balls between the star wheel and the bell shell. The bell shell is an important part of the torque transmission in the BJ type constant velocity universal joint. When powered, the bell-shaped shell needs to bear a large driving torque. The accuracy of the arc size of the raceway and the differential structure of the structure are directly related to the bonding state of the steel balls in the raceway and the ballway, which in turn affects its performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B21J5/06B21J13/02B21C23/18
CPCB23P15/00B23P2700/01F16D3/16
Inventor 王立军赵云黄风立金秋明向军
Owner ZHEJIANG ODM TRANSMISSION TECH
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