Multi-station cold heading method of automobile wheel cup nut, and mold thereof

A cup-shaped nut, multi-station technology, applied in the direction of nuts, forming tools, manufacturing tools, etc., can solve the problems of large size dispersion, low production efficiency, unstable quality, etc., and achieve high forming efficiency and improved material utilization. , the effect of easy flange size

Pending Publication Date: 2018-09-28
DONGFENG MOTOR FASTENER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a multi-station cold heading method and mold for automobile wheel cup nuts, which solves the problems of low production efficiency, unstable quality and large size dispersion in the existing technology

Method used

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  • Multi-station cold heading method of automobile wheel cup nut, and mold thereof
  • Multi-station cold heading method of automobile wheel cup nut, and mold thereof
  • Multi-station cold heading method of automobile wheel cup nut, and mold thereof

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Embodiment Construction

[0030] A kind of multi-station cold forging method of automobile wheel cup nut, concrete steps are as follows:

[0031] (1) Pre-shaping: such as image 3 As shown, the coil 2 with a diameter of Φ27.6mm and a thickness of 42.8mm is sent into the multi-station cold pier mold for pre-shaping, as shown in Figure 4 As shown, the two ends of the coil are extruded flat at one time, and the chamfer of the lower edge of the coil is extruded at the same time. After pre-shaping, the diameter of the coil increases by 0.3mm and the thickness decreases by 0.1mm;

[0032] (2) Shaping: Send the pre-shaping disk 2 obtained in step (1) into the multi-station cold pier mold for shaping, such as Figure 5 As shown, the two ends of the coil are extruded to be smooth, and at the same time, the chamfer of the upper edge of the coil is extruded. After shaping, the diameter of the coil increases by 0.3mm and the thickness decreases by 0.1mm;

[0033] (3) Finishing: Send the shaping plate 2 obtained...

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Abstract

The invention relates to a multi-station cold heading method of an automobile wheel cup nut, and a mold thereof. The multi-station cold heading method of the automobile wheel cup nut comprises six stations: pre-shaping, shaping, finishing, forming a flange, compositely extruding and finishing forming. A preform sequentially passes through the six stations, namely, pre-shaping, shaping, finishing,forming a flange, compositely extruding and finishing forming so as to be processed by one machine; in order to solve the problem that a molding part is easy to crack due to shear cracks since the preform is made of low-carbon steel so as to be easy to tear, the method provided by the invention adopts a six-step forming method; according to the method provided by the invention, the product dimension accuracy is improved, the product quality is high, the material utilization ratio is high, and the forming efficiency is high.

Description

technical field [0001] The invention relates to a multi-station cold heading method for a cup nut of an automobile wheel and a mold thereof. Background technique [0002] In the fastener industry, the wheel cup nut is a high-strength fastener on the automobile, and it is a key part connecting the hub and the spoke of the automobile wheel. Because of its large size, complex geometry and high precision requirements, the ML20Cr material used is The mechanical properties are high, the plastic forming deformation is complicated, and the process is difficult. Therefore, most of them are produced by punching press extrusion process, with many intermediate annealing and phosphating production processes, complex processes, low production efficiency, unstable quality, and scattered sizes. Big difference. [0003] like figure 1 The structure of the wheel cup nut 1 is shown. The wheel cup nut 1 is divided into a flange body 101, a cylinder body 102, a circular arc transition surface 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/70B21J5/00B21J13/02B21D53/24B21D37/08
CPCB21D37/08B21D53/24B21J5/002B21J13/02B21K1/70
Inventor 唐志文何利武
Owner DONGFENG MOTOR FASTENER CO LTD
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