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A Cold Forging Process of Hollow Output Shaft with Flange

A forming process and output shaft technology, which is applied in the field of metal stamping, can solve the problems of reducing the service life of products, waste of blanks, and low strength, and achieve the effects of saving blanks, improving service life and high strength

Active Publication Date: 2019-03-22
JIANGSU CHUANGYI PRECISION FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing forging process has the following defects: (1), in the forging process, only the middle end of the output shaft is over-extruded, resulting in low strength of the undeformed section of the output shaft, which reduces the service life of the product; (2) ), the hollow hole is formed by mechanical drilling, resulting in a serious waste of blanks

Method used

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  • A Cold Forging Process of Hollow Output Shaft with Flange
  • A Cold Forging Process of Hollow Output Shaft with Flange
  • A Cold Forging Process of Hollow Output Shaft with Flange

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] see figure 2 and image 3 , in a specific embodiment, the cold forging forming process of the output shaft of the hollow tube with the flange edge provided by the present invention comprises the following steps:

[0027] 1. Cutting: take 20CrMnTi round steel bar and saw and cut to obtain columnar blank 200a, and control the weight of columnar blank 200a to be 5-8% heavier than the weight of the finished product.

[0028] 2. Billet softening: use a pit furnace to heat the columnar billet 200a to 700°C, hold it for 4.5 hours, then heat it to 750°C, hold it for 4.5 hours, cool it to 700°C with the furnace, hold it for 1 hour, and cool it slowly with the furnace to less than After 350°, it is cooled naturally after being rel...

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Abstract

The invention discloses a cold forging forming process for a hollow output shaft with a flange edge. The cold forging forming process comprises the following steps of blanking, blank softening, blank making, the first time of shot blasting, the first time of surface phosphatization and saponification, the first time of extrusion forming, stress relief annealing, the second time of shot blasting, the second time of surface phosphatization and saponification, the second time of extrusion forming and connected skin removal. Compared with the prior art, the cold forging forming process has the technical effects that 1, during extrusion preparation of a hollow hole and forming of the flange edge, all segments of a product are subjected to deformation extrusion to obtain high strength, and thus the service life of the product is prolonged; and 2, the hollow hole is formed through flowing of materials in the extrusion process, a blank is saved, and production cost of the product is reduced.

Description

technical field [0001] The invention relates to the field of metal stamping, in particular to a cold forging forming process of a hollow tube output shaft with a flange. Background technique [0002] Hollow tube output shafts with flanges, also known as tube shafts, are key components in automobiles, and due to their high usage, the economy of the manufacturing process is also an important consideration. [0003] see figure 1 , the existing hollow tube output shaft with a flange edge is generally machined after forging, and its brief process flow is: blanking: to obtain a columnar blank 100a; billet making: use a machine tool to remove oxidation on the surface of the blank 100a Defects such as skin, microcracks, etc., to obtain a qualified columnar blank 100b; extrusion molding: put the columnar blank 100b into an extrusion die with a predetermined shape, and extrude the upper and lower ends of the columnar blank 100b to obtain a primary forming with a flange edge Product ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 张花根陈雪锋季微微王成勇
Owner JIANGSU CHUANGYI PRECISION FORGING
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