Cold extrusion forming process for oil pump shaft for automobile

A molding process and oil pump shaft technology, applied in the field of processing technology, can solve the problems of increasing process steps and processing costs, difficult to control product accuracy, etc., and achieve the effects of saving raw materials and processing costs, improving internal quality, and reducing processing volume.

Inactive Publication Date: 2012-06-27
上海久丰汽车零件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing technology not only increases the process steps and processing cost, but also makes it difficult to control the accuracy of the product, and there are processing errors and cumulative errors

Method used

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  • Cold extrusion forming process for oil pump shaft for automobile
  • Cold extrusion forming process for oil pump shaft for automobile
  • Cold extrusion forming process for oil pump shaft for automobile

Examples

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Embodiment Construction

[0026] In order to better understand the technical solution of the present invention, it will be described in detail below through specific embodiments in conjunction with the accompanying drawings:

[0027] see Figure 3a to Figure 3g , the cold extrusion forming process of a kind of automobile oil pump axle of the present invention, comprises the following steps:

[0028] Step 1, saw a round bar blank 51 of required length on a disc according to product requirements (see Figure 3a ), to ensure that the length tolerance of the round bar blank is 0 to 0.1mm, and to make the perpendicularity between the two ends of the round bar blank and the outer peripheral surface of the round bar blank be 0.10mm;

[0029] Step 2, carry out the first phosphorus saponification treatment to the round bar blank 51 according to the conventional phosphorus saponification process;

[0030] Step 3, shaping the round bar blank through step 2 and punching guide positioning pits to make blank 52 (s...

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PUM

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Abstract

The invention discloses a cold extrusion forming process for an oil pump shaft for an automobile. The cold extrusion forming process comprises the following steps of: 1, blanking; 2, performing phosphorus saponification for the first time; 3, shaping and punching to form a guide positioning pit; 4, performing spheroidizing annealing; 5, performing shot blasting; 6, performing the phosphorus saponification for the second time; 7, performing backward extrusion to obtain a pre-cooling extrusion piece in which a bottom edge is reserved and which has a hollow straight wall; 8, annealing; 9, punching the bottom edge of the pre-cooling extrusion piece; 10, rectifying deviation and lathing an excircle, a flat head, a fillet and a tear strip; 11, performing the phosphorus saponification for the third time; and 12, performing forward extrusion, and pressing to form a cold extrusion piece for the oil pump shaft. By the cold extrusion forming process for the oil pump shaft for the automobile, the oil pump shaft for the automobile is subjected to extrusion forming once, so that the slight cutting or no cutting of complex pipe fittings is implemented.

Description

technical field [0001] The invention relates to a processing technology, in particular to a cold extrusion forming technology of an oil pump shaft for an automobile. Background technique [0002] The oil pump shaft is a kind of pipe product. Its material is S45C, with a carbon content of 0.45%. It is a medium carbon steel with high hardness. [0003] The shaft of the oil pump for automobiles is a hollow shaft (see figure 1 ), the inner circle 10 of the oil pump shaft for automobiles has four inner circles 11, 12, 13, and 14 connected in sequence from small to large and corresponding inner diameters are d1, d2, d3, and d4 respectively. The lengths corresponding to the largest end faces of the circular surface are n1, n2, n3, and n4 respectively, and its outer circle 20 also has four sections connected in sequence and the corresponding outer diameters are respectively D1, D2, D3, and D4. 21, 22, 23, 24, the lengths from the four sections of outer circular surfaces 21, 22, 23...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21C23/03
Inventor 谢华民
Owner 上海久丰汽车零件有限公司
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