Forging method capable of reducing curvature of slender steel

A bending degree and steel technology, which is applied in the field of steel forging, can solve the problems that slender steel is easy to bend, etc., and achieve the effect of reducing the number of preheating and straightening and rectification, saving manufacturing costs, and being easy to implement

Active Publication Date: 2020-06-12
建龙北满特殊钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the precision forging machine is prone to bending when forging slender steel, the invention provides a forging method that reduces the bending of slender steel

Method used

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  • Forging method capable of reducing curvature of slender steel
  • Forging method capable of reducing curvature of slender steel
  • Forging method capable of reducing curvature of slender steel

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a forging forming method for reducing the curvature of the steel when the precision forging machine forges the slender steel.

[0028] A 16MN horizontal precision forging machine is adopted, the programming software for automatic control is BarForge, and the model of the round hammer head is R120 or R150. Requirements for forging round billets: the weight of the billet must be ≤8 tons, the length of the billet must be >1.5 meters, the initial diameter of the billet must be less than Φ690mm (only for bending), the length of the finished product must be ≤20 meters, and the minimum diameter of the finished product is Φ120mm.

[0029] The blank used in this example is H13 die steel, with a weight of 3.17 tons and a specification of The forged product is H13 die steel with a specification of Φ200+2 / -0*12000mm. The specific preparation process of the product is: blank→heating→forging to the finished product size with a precision forging machine.

...

Embodiment 2

[0054] This embodiment provides a forging forming method for reducing the curvature of the steel when the precision forging machine forges the slender steel.

[0055] A 16MN horizontal precision forging machine is adopted, the programming software for automatic control is BarForge, and the model of the round hammer head is R120 or R150. Requirements for forging round billets: the weight of the billet must be ≤8 tons, the length of the billet must be >1.5 meters, the initial diameter of the billet must be less than Φ690mm (only for bending), the length of the finished product must be ≤20 meters, and the minimum diameter of the finished product is Φ120mm.

[0056] The blank used in this embodiment is 42CrMo bonded steel with a weight of 1.78 tons and a specification of The forged product is 42CrMo bonded steel with a specification of Φ150+2 / -0*12000mm. The specific preparation process of the product is: blank→heating→forging to the finished product size with a precision forgin...

Embodiment 3

[0071] This embodiment provides a forging forming method for reducing the curvature of the steel when the precision forging machine forges the slender steel.

[0072] A 16MN horizontal precision forging machine is adopted, the programming software for automatic control is BarForge, and the model of the round hammer head is R120 or R150. Requirements for forging round billets: the weight of the billet must be ≤8 tons, the length of the billet must be >1.5 meters, the initial diameter of the billet must be less than Φ690mm (only for bending), the length of the finished product must be ≤20 meters, and the minimum diameter of the finished product is Φ120mm.

[0073] The blank used in this example is D-SFCM860-1 structural steel, with a weight of 3.7 tons and a specification of The forged product is D-SFCM860-1 structural steel with a specification of Φ180+2 / -0*18000mm. The specific preparation process of the product is: blank→heating→forging to the finished product size with a p...

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Abstract

The invention relates to a forging method capable of reducing curvature of slender steel, and belongs to the technical field of steel forging. In order to solve the problem that a precision forging machine is liable to generate bending during slender steel forging, the invention provides the forging method capable of reducing the curvature of the slender steel. A deformation way of alternating forging passes and no-load passes in a precision forging process is adopted, an initial-stage forging pass adopt a regular forging method, the last two forging passes start to forge one end of a materialfrom the middle position, with certain distance from the end head of the material, return to the middle position with no load and forge to the other end of the material from the position. Structuralstress and deformation stress generated during forging are released through the no-load passes, so that the stress is prevented from being focused to generate bending; and the last two forging passesadopt pulling and punching to reduce bending caused by impact generated by the material and the edge of a hammer head in a pushing-in process, so that linearity of a slender rod or square steel forgedby the precision forging machine is effectively controlled, and a qualification rate of the product is increased.

Description

technical field [0001] The invention belongs to the technical field of steel forging, and in particular relates to a forging method for reducing the curvature of elongated steel. Background technique [0002] In the process of forging slender steel with the precision forging machine, according to the forging method of the precision forging machine, the required steel products are forged from different deformations in each pass. The specific process of forging slender steel with the existing precision forging machine: the two ends of the precision forging machine are respectively equipped with A jaw and B jaw to hold the material. During the forging process, the material is carried by the A jaw to the side of the B jaw. , the hammer head merges to the corresponding forging size during the walking process. When the A jaw carries the material forward to a certain distance, the B jaw can clamp the material stably. At this time, the A and B jaws simultaneously carry the material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J13/06B21J13/10B21K27/00
CPCB21J5/00B21J13/06B21J13/10B21K27/00
Inventor 牛震李殿生雷玉臣刘鹏宇姚凤祥刘占东贾俊林唐刚孟祥英
Owner 建龙北满特殊钢有限责任公司
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