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A kind of forging method of multi-stage stepped roll with conical frustum

A conical truncated and stepped technology, applied in the direction of rolls, manufacturing tools, metal rolling, etc., can solve the problems of waste of raw materials, long machining time, large forging allowance, etc.

Active Publication Date: 2021-09-14
建龙北满特殊钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem with this forming method is that the forging allowance is large, and the follow-up machining time is long and the waste of raw materials is serious.

Method used

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  • A kind of forging method of multi-stage stepped roll with conical frustum
  • A kind of forging method of multi-stage stepped roll with conical frustum
  • A kind of forging method of multi-stage stepped roll with conical frustum

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0027] A forging method of a multi-stage stepped roll with a conical truncated roll, the process flow of the forging method of a multi-stage stepped roll with a conical truncated truncated steel ingot → press the jaw → first upsetting → first time Drawing the oblong billet → upsetting for the second time → drawing the oblong billet for the second time → drawing the oblong billet for the third time → half-die forging with a special upper anvil → pressing table, finishing each part to the finished product size → For heat treatment, the special-purpose upper anvil is an upper flat-slope anvil, and the angle between the bottom edge of the upper flat-slope anvil and the horizontal plane is equal to the angle of the truncated cone of a multi-stage stepped roll with a truncated cone.

[0028] The forging method of a multi-stage stepped roll with a conical truncated roll described in this embodiment adopts a 30MN hydraulic press for forging, and the steel ingot weighs 10.3 tons.

[00...

specific Embodiment approach 2

[0043] A forging method of a multi-stage stepped roll with a conical truncated roll, the process flow of the forging method of a multi-stage stepped roll with a conical truncated truncated steel ingot → press the jaw → first upsetting → first time Drawing the oblong billet → upsetting for the second time → drawing the oblong billet for the second time → drawing the oblong billet for the third time → half-die forging with a special upper anvil → pressing table, finishing each part to the finished product size → For heat treatment, the special-purpose upper anvil is an upper flat-slope anvil, and the angle between the bottom edge of the upper flat-slope anvil and the horizontal plane is equal to the angle of the truncated cone of a multi-stage stepped roll with a truncated cone.

[0044] The forging method of a multi-stage stepped roll with a conical truncated roll described in this embodiment, the described forging method of a multi-stage stepped roll with a conical truncated ro...

specific Embodiment approach 3

[0056] A forging method of a multi-stage stepped roll with a conical truncated roll, the process flow of the forging method of a multi-stage stepped roll with a conical truncated truncated steel ingot → press the jaw → first upsetting → first time Drawing the oblong billet → upsetting for the second time → drawing the oblong billet for the second time → drawing the oblong billet for the third time → half-die forging with a special upper anvil → pressing table, finishing each part to the finished product size → For heat treatment, the special upper anvil is an upper flat-slope anvil, and the angle between the bottom edge of the upper flat-slope anvil and the horizontal plane is ≤ the angle of the truncated cone of the multi-step roller with a truncated cone.

[0057] The forging method of a multi-stage stepped roll with a conical truncated roll described in this embodiment, the described forging method of a multi-stage stepped roll with a conical truncated roll adopts a 30MN hyd...

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Abstract

A method for forging a multi-stage stepped roll with a truncated cone belongs to the technical field of the preparation of a multi-stage stepped roll. The technical problem to be solved by the present invention is to improve the first pass rate and quality of forgings. The technological process of the present invention is steel ingot heating → pressing jaw → first upsetting → first drawing of oval blank → second upsetting → second drawing of oval blank → third drawing of oval blank Blank → semi-die forging with special upper anvil → pressing table, finishing each part to finished product size → heat treatment, the special upper anvil is an upper flat slope anvil, and the angle between the bottom edge of the upper flat slope anvil and the horizontal plane ≤ the angle of the truncated cone of the multi-step roller with truncated cone, the forging method is forged by a 30MN hydraulic press, and the weight of the steel ingot is 10.3 tons. The metal flow line of the forging piece of the invention is better, and the first pass rate reaches more than 95%. The present invention is used for the forging of multi-step stepped rolls.

Description

technical field [0001] The invention belongs to the technical field of multi-step roll preparation, and in particular relates to a forging method of a multi-step roll with a conical frustum. Background technique [0002] Free forging is a processing method that uses impact force or pressure to cause plastic deformation of metal blanks on the anvil or between the upper and lower anvils of the forging press to obtain forgings. Compared with casting products, free forging can not only eliminate the defects such as shrinkage cavity, porosity, and pores that may be caused by casting products, but also refine the grains to improve the mechanical properties of the product. Free forging relies on manual operation to control the shape and size of the forging, so the precision of the forging is low, the machining allowance is large, the labor intensity is high, and the productivity is not high, so it is mainly used in single piece and small batch production. In the field of free forg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/06B21J5/08B21J9/12B21J13/06B21K29/00B21B27/02
CPCB21B27/02B21J5/002B21J5/06B21J5/08B21J9/12B21J13/06B21K29/00
Inventor 牛震刘鹏宇雷玉臣郑福胜孟祥英赵晓君刘占东蒋伟斌黄宪军
Owner 建龙北满特殊钢有限责任公司
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