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Method for forging outer circle roller way streamline of railway bearing loop

A technology of outer ring raceway and railway bearing, applied in the field of bearing ring preparation, can solve problems such as low material utilization rate

Inactive Publication Date: 2018-12-21
无锡市东日昌轴承制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process of cutting metal to form the raceway leads to low material utilization rate, and the raceway of the bearing ring obtained through large cutting allowance cuts off the metal flow line, and the metal flow line reverses

Method used

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  • Method for forging outer circle roller way streamline of railway bearing loop
  • Method for forging outer circle roller way streamline of railway bearing loop
  • Method for forging outer circle roller way streamline of railway bearing loop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] a. figure 2 It is a sectional view of the material section of the present invention. Such as figure 2 As shown, the raw material GCr15 for the preparation of K-class railway bearing rings is selected, and the K-class railway bearing rings are designed according to AAR standard M-934. GCr15 is high-carbon chromium, and GCr15 is cut by a CNC sawing machine model GZ4230 to obtain material section 1.

[0033] b. image 3 It is a cross-sectional view of the structure when the present invention is upsetting. Such as image 3 As shown, the material section 1 is horizontally placed in a heating furnace with a volume of 1160×1025×4500 and heated to 1150°C, and then upsetting is carried out after heating. Upsetting reduces the height of the section 1 and increases the cross section.

[0034] c. Figure 4 It is a cross-sectional view of the structure of the present invention during reverse extrusion. Such as Figure 4 As shown, the material segment 1 in step b is back-e...

Embodiment 2

[0040] a. figure 2 It is a sectional view of the material section of the present invention. Such as figure 2 As shown, the raw material GCr15 for preparing K-class railway bearing rings is selected. GCr15 was cut by a CNC sawing machine model GZ4230 to obtain section 1.

[0041] b. image 3 It is a cross-sectional view of the structure when the present invention is upsetting. Such as image 3 As shown, the material section 1 is horizontally placed in a heating furnace with a volume of 1160×1025×4500 and heated to 1200°C, and then upsetting is carried out after heating. Upsetting reduces the height of the section 1 and increases the cross section.

[0042] c. Figure 4 It is a cross-sectional view of the structure of the present invention during reverse extrusion. Such as Figure 4 As shown, the material segment 1 in step b is back-extruded. The press cooperates with the stamping die of the press to punch holes. The stamping die is a forming punch with a diameter o...

Embodiment 3

[0048] a. figure 2 It is a sectional view of the material section of the present invention. Such as figure 2 As shown, G20Cr2Ni4 is selected as the raw material for preparing K-grade railway bearing rings. G20Cr2Ni4 is carburized steel, and G20Cr2Ni4 is cut by a CNC sawing machine model GZ4230 to obtain material section 1.

[0049] b. image 3 It is a cross-sectional view of the structure when the present invention is upsetting. Such as image 3 As shown, the material segment 1 is horizontally placed in a heating furnace with a volume of 1160×1025×4500 and heated to 1200°C, and then upset after heating. Upsetting reduces the height of the section 1 and increases the cross section.

[0050] c. Figure 4 It is a cross-sectional view of the structure of the present invention during reverse extrusion. Such as Figure 4 As shown, the material segment 1 in step b is back-extruded. The press cooperates with the stamping die of the press to punch holes. The stamping die is...

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Abstract

The invention relates to a method for forging the outer circle roller way streamline of a railway bearing loop. The method comprises the steps that a, raw materials for preparing the bearing ring areselected and sheared through a sawing machine to form a material section 1; b, the material section 1 is put into a heating furnace to be heated and is upset after being heated; c, reverse extrusion is carried out on the material section 1 obtained in the step b, punching is carried out through cooperation of a press and a punching die of the press to form a blind hole 2 and a margin 3 which is ina ring shape, braize is added to lubricate the die in the punching process or the front portion of a punch bit is coated with lubricating grease, and at the moment, the height of the material section1 is 185 mm; d, the margin 3 is separated from the blind hole 2, the margin 3 is leveled to be 172 mm after separation, and meanwhile the inner angle is trimmed; e, the flat end face of the margin 3treated in the step d is conveyed to a ring rolling machine for rolling, an outer circle forge piece 5 with a roller way 4 is obtained by rolling the margin 3, specifically, rolling is carried out repeatedly; and f, through shaping tests, the outer circle forge piece, with a metal streamline distributed along the roller way, of the bearing loop is obtained. By means of the method, the reverse mode of the outer circle roller way stream line is changed.

Description

technical field [0001] The invention relates to the field of preparation of bearing rings, in particular to a method for forging raceway streamlines of outer rings of railway bearing rings. Background technique [0002] During the processing of metal materials, the internal pores are loose and various inclusions are elongated along the deformation direction and distributed in the form of fibers. After polishing and acid corrosion on its longitudinal section, striated lines can be seen, which are called metal fibrous tissue or metal flow lines. Metal flow lines are formed by the stretching of low melting point components and banded structure segregation in metals during rolling or extrusion. [0003] As far as bearings are concerned, the main form of damage that affects bearing life is fatigue spalling, and the fatigue spalling of bearings has a lot to do with metal flow lines. The traditional process of cutting metal to form a raceway leads to low material utilization. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B23P15/003
Inventor 尚万寿
Owner 无锡市东日昌轴承制造有限公司