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Cold forging die and cold forging process for internal spline transmission shaft of automobile steering connection yoke

A technology of internal splines and transmission shafts, which is applied in the field of cold forging dies and cold forging technology of internal spline transmission shafts of automobile steering conjoined yokes, and can solve the limitations of cold forging die adaptability, sliding and wear resistance , reduce sensitivity and other issues, to achieve the effect of improving production efficiency and product quality, excellent sensitivity performance, and improving economic benefits

Inactive Publication Date: 2020-08-07
TIANJIN CHANGLE ELECTRONICS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cold forging die and cold forging process for the inner spline drive shaft of the automobile steering joint yoke, which solves the problem of limited adaptability, poor flexibility, and cold forging existing in the prior art. Products obtained by the forging process also have the problems of limited transmission, sliding and wear resistance, resulting in reduced sensitivity

Method used

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  • Cold forging die and cold forging process for internal spline transmission shaft of automobile steering connection yoke
  • Cold forging die and cold forging process for internal spline transmission shaft of automobile steering connection yoke
  • Cold forging die and cold forging process for internal spline transmission shaft of automobile steering connection yoke

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Experimental program
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Effect test

Embodiment 1

[0038] A kind of cold forging die for the inner spline transmission shaft of the automobile steering conjoined joint yoke, see figure 1 , comprising an upper punch 1 and a lower die 2, the bottom surface of the upper punch 1 is provided with a downward convex column type upper convex structure, the lower die 2 is located below the upper punch 1; the lower die 2 The first lower die cushion block 3, the second lower die cushion block 4, the third lower die cushion block 5 and the fourth lower die cushion block 6 are arranged in sequence below; the lower die 2 and the first lower die The cushion block 3 is provided with a connected through-hole type lower concave structure, and the upper convex structure matches the lower concave structure; the second lower concave mold cushion block 4, the third lower concave mold cushion block 5 and the fourth The lower die pad 6 is provided with a connected through-hole type lower ejector rod hole, the lower ejector rod 7 is arranged in the lo...

Embodiment 2

[0046] A cold forging process for an internal spline transmission shaft of an automobile steering conjoined joint yoke, comprising the following steps,

[0047] The first step is wire drawing. The workpiece material is passed through a mechanical wire drawing device, so that the cross-sectional area of ​​the metal material is compressed, and the wire drawing process is completed;

[0048] In the second step, cutting, the workpiece raw material after the wire drawing process is cut by a cutting machine; as image 3 Shown is the structural schematic diagram of the workpiece raw material after cutting in the second step.

[0049] The third step is degreasing, and the workpiece raw material that has been cut off is cleaned and dried by surface impurities to complete the degreasing treatment;

[0050] The fourth step is annealing for the first time, heating the workpiece raw material to a predetermined temperature, passing a predetermined holding time according to the material and...

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Abstract

The invention discloses a cold forging die and a cold forging process for an internal spline transmission shaft of an automobile steering connection yoke. The cold forging die is characterized in thatan upper bulge structure is arranged on the bottom surface of an upper punch, and a lower die is arranged below the upper punch; a first lower die cushion block, a second lower die cushion block, a third lower die cushion block and a fourth lower die cushion block are arranged below the lower die in sequence; a connected through hole type lower concave structure is arranged in the lower die and the first lower die cushion block, and the upper bulge structure is matched with the lower concave structure; a connected through hole type lower ejector rod hole is arranged in the second lower die cushion block, the third lower die cushion block and the fourth lower die cushion block; a lower ejector rod is arranged in the lower ejector rod hole; and a lower ejector rod cushion block is arrangedat the bottom of the lower ejector rod hole of the fourth lower die cushion block. The cold forging die is excellent in adaptability and flexibility; a product obtained by the cold forging process isexcellent in transmission performance, sliding performance, wear resistance and sensitivity; the production efficiency and the product quality can be effectively improved; and the economic benefit isimproved.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a cold forging die and a cold forging process for an inner spline transmission shaft of an automobile steering joint yoke. Background technique [0002] At present, with the rapid development of the automobile industry, higher and higher requirements are put forward for the manufacturing technology of automobile parts. Its mold has good adaptability, good flexibility and convenient use, and the products manufactured by its cold forging process are required to have excellent transmission, sliding and wear resistance, so that it can run smoothly, with low noise and high sensitivity. . The Chinese utility model patent document with the notification number N208437596U discloses a spline forging die for an automobile transmission shaft, which includes a sleeve, a barrel mold and a bottom mold. There is an annular baffle on the top of the barrel, and four vertical li...

Claims

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Application Information

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IPC IPC(8): B21J13/02B21J5/00B21K1/06
CPCB21J5/002B21J13/02B21K1/066
Inventor 张凤华房桂海
Owner TIANJIN CHANGLE ELECTRONICS SCI & TECH