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Processing method of deep-hole pin bush parts

A processing method and pin sleeve technology, applied in the field of metal plastic forming, can solve the problems affecting fatigue resistance, fracture, etc., and achieve the effects of convenient subsequent processing, high material utilization rate and low processing cost

Inactive Publication Date: 2009-03-25
JIANGSU SUNWAY PRECISION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this process is that the material utilization rate is high, and the disadvantage is that during composite extrusion, the continuous skin is left in the middle of the workpiece. Affects fatigue strength and causes problems of early fracture

Method used

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  • Processing method of deep-hole pin bush parts
  • Processing method of deep-hole pin bush parts

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Taking the processing process of 320 pin sleeves as an example, the process flow is:

[0015] 1. For sawing, choose a hot-rolled round bar with a diameter of φ60 mm, the material grade is IE2892, adjust the cutting length, and control the weight at 2350-2390 grams;

[0016] 2. Heating, the process is as follows: heating to 870°C with the furnace, and warm extrusion after being out of the furnace.

[0017] 3. Upsetting, upsetting from the billet diameter of φ60mm to φ70mm, the length is determined by the weight.

[0018] 4. Reverse extrusion, reverse extrusion from upsetting material φ70mm to outer circle φ69.5mm, inner hole φ36.5mm, hole depth 100mm, deformation is about 28.6%.

[0019] 5. Conventional temperature control cooling.

[0020] 6. Punching, punch out the through hole φ34mm from the continuous skin at the end of the inner hole φ36.5mm of the reverse extrusion material.

[0021] 7. Conventional shot blasting process.

[0022] 8. Conventional phosphorus sap...

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Abstract

The invention provides a deep-hole pin bush parts processing method, relating to a metal plasticity modeling technology and belonging to a precise cold warm-forging modeling technology field of the deep-hole pin bush parts. The process step at least includes: 1, cutting materials; 2, warm-forging the material to form a cylinder shape; 3, punching and removing the connected skin of one end of the cylinder blank; 4, processing the surface conventionally; 5, accurately forming the shape by cold extrusion through a run-through extrusion process and finally obtaining a product which suffices the structural performance and the size accuracy requirements. The method has the advantages of a high utilization rate, easy processing, and capability of meeting mass production requirements, and the produced product has a perfect metal streamline and high fatigue resistance.

Description

Technical field [0001] The invention relates to a metal plastic forming technology, which belongs to the technical field of precision cold and warm forging forming of deep-hole pin sleeve parts. Background technique [0002] Among the pin sleeve parts, most of them are deep-hole products with an inner hole length-to-diameter ratio of 3.5 or more. At present, there are two methods for producing such products: one is to use simple machining technology, and the other is to use cold A combination of forging and machining. The process of the first process is: sawing, turning the outer circle, drilling, and CNC machining the outer circle and inner hole according to the product requirements. This process has the advantage of simple process path, but there are also two disadvantages at the same time, namely, drilling Difficulty and low material utilization. The specific steps of the second process are: 1. Saw material, 2. Spheroidizing annealing to ensure the required material pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21J5/08B21C23/14
Inventor 徐祥龙张骏施卫兵
Owner JIANGSU SUNWAY PRECISION FORGING
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