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Machining method of profiling lower die blank of 22224 aligning spherical roller

A technology of spherical rollers, processing methods, applied in the field of bearing parts manufacturing

Inactive Publication Date: 2013-10-23
DALIAN METALLURGICAL BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]At present, the spherical rollers of the 22224 self-aligning spherical roller bearings are generally processed by turning first and then grinding. Due to the large production volume of 22224 bearings Larger, the size of the roller (diameter Φ25, length 21.14) is processed by lathe, and the quantity processed by one lathe per shift is about 350-450 pieces, the efficiency is too low, and the processing method of pressing with a press can press the number of profiling per shift About 8000 pieces, although the pressing is fast, the service life of the pressing die is the key

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  • Machining method of profiling lower die blank of 22224 aligning spherical roller

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Embodiment Construction

[0012] A method for processing a 22224 self-aligning spherical roller die blank, comprising the following process steps:

[0013] (1) Cutting material: select Gr15 high-carbon chromium steel, forging blanking, material diameter Φ120, cutting length 175, waiting for forging and casting;

[0014] (2) The starting temperature of forging is 1130°C. After upsetting the forging material, forge the square, draw the square to length, then upset, forge the square, draw the square to length, then upset, forge the square, and draw the square to length , followed by three times in succession to form the tire, stop the forging temperature at 800°C, and punch out a cavity with a processing capacity of 2 mm on the end face of the die, so that the metal fiber direction of the material is in line with the force axis of the lower die. The direction is vertical, and the fiber direction of the surrounding material of the cavity is perpendicular to the force direction of the press type, that is to...

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Abstract

The invention relates to a machining method of a profiling lower die blank of a 22224 spherical roller. The method is characterized by comprising the following processing steps that: the profiling lower die blank of the 22224 spherical roller takes Gr15 high-carbon chromium high-quality steel as a material; the material is prepared and blanked (a material diameter phi is 120 and a blanking length is 175); start forging temperature is 1100-1130 DEG C. The specific machining method comprises the steps of: upsetting, forging a square, drawing the square, upsetting, forging the square, drawing the square again, upsetting, forging the square, drawing the square again, loading a casing and forming at forging-stop temperature of 800-900 DEG C, forming potholes in the end faces of a die with a forming punch, allowing a metal fiber direction of the material to be perpendicular to a stress axis direction of the lower die, and allowing fiber directions of the material around the potholes to be perpendicular to a stress direction during profiling, wherein an allowance between the dimensions of each pothole and a cavity is 1.5-2mm. The service life of the profiling lower die machined by the method can be prolonged by 2-3 times.

Description

technical field [0001] The invention relates to the technical field of bearing parts manufacturing, in particular to a processing method for blank forging of a lower mold of a 22224 self-aligning spherical roller bearing. Background technique [0002] At present, the spherical rollers of the 22224 self-aligning spherical roller bearings are generally processed by turning first and then grinding. Due to the large production batches of 22224 bearings, the size of the rollers (diameter Φ25 and length 21.14) need to be machined. The processing method is that a lathe can process about 350-450 pieces per shift, and the efficiency is too low. The processing method of pressing with a press can press about 8,000 pieces per shift. Longevity is key. [0003] In order to solve the 22224 self-aligning spherical roller with profiling instead of turning, to improve work efficiency, the service life of the profiling die is the key. It is more than 160 tons. The outer dimension of the lowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00
Inventor 王恒臣
Owner DALIAN METALLURGICAL BEARING
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