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A kind of production method of oblique l-shaped ring with large height-to-diameter ratio

A production method and a technology of height-to-diameter ratio, which is applied to vehicle parts, transportation and packaging, etc., can solve the problems of affecting the strength of the bottom flange, difficulty in balancing the axial force, and reducing material utilization, so as to improve the quality of forgings and the utilization of materials The effect of high efficiency, reasonable distribution and complete streamline

Active Publication Date: 2017-10-27
安徽汉正轴承科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rings are widely used in automotive, petrochemical, aerospace and other fields. The existing ring rolling production technology is generally suitable for rings with a height-to-diameter ratio of 0.6 or less, and rings with a large height-to-diameter ratio with tapers and flanges, due to It is not easy to balance the axial force during the ring rolling process, and it is very difficult to directly form the ring rolling
The existing technical solution is to machine the bottom flange first, which not only reduces the utilization rate of materials, wastes man-hours, increases production costs, but also cuts off the flow line of the forging to a certain extent, affecting the strength of the bottom flange

Method used

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  • A kind of production method of oblique l-shaped ring with large height-to-diameter ratio
  • A kind of production method of oblique l-shaped ring with large height-to-diameter ratio
  • A kind of production method of oblique l-shaped ring with large height-to-diameter ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Production example of D406A oblique L-shaped ring with large height-to-diameter ratio. The slope of the ring section is 3.5°, the height-to-diameter ratio is 0.70, the length of the flange is 34mm, and the height is 32mm. The production process is: blanking → upsetting → punching → ring rolling billet → pre-forging billet → reverse extrusion forming → machining and heat treatment. The specific implementation steps are as follows:

[0022] Step 1: Blanking: the blanking specification is Φ200mm×346mm, and the weight is 133kg;

[0023] Step 2: Upsetting: Upsetting the blanked bar after heating, the upsetting height is 165mm;

[0024] Step 3: punching: punching diameter is Φ100mm;

[0025] Step 4: ring rolling billet: after heating the punched raw billet, roll it on a ring rolling mill to form a ring billet with an outer diameter of 430 mm, a wall thickness of 40 mm, and a height of 290 mm;

[0026] Step 5: Pre-forging billet: After deburring, shot blasting, chamfering a...

Embodiment 2

[0030] Production example of D406A oblique L-shaped ring with large aspect ratio. The production process is: blanking → upsetting → punching → ring rolling billet → pre-forging billet → reverse extrusion forming → machining and heat treatment. The specific implementation steps are as follows:

[0031] Step 1: Blanking: the blanking specification is Φ250mm×413mm, and the weight is 159kg;

[0032] Step 2: Upsetting: Upsetting the blanked bar after heating, the upsetting height is 165mm;

[0033] Step 3: punching: punching diameter is Φ100mm;

[0034] Step 4: ring rolling billet: after heating the punched original billet, roll it on a ring rolling mill to form a ring billet with an outer diameter of 460mm, a wall thickness of 44mm, and a height of 290mm;

[0035] Step 5: Pre-forging billet: After deburring, shot blasting, chamfering and spraying lubricant in sequence, the obtained ring billet is heated to 1100°C, kept for 2 hours, and pre-forged into an inverted trapezoidal ho...

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Abstract

The invention relates to a production method of an inclined L-shaped annular piece with a large height-to-diameter ratio. The method includes the steps that an original blank is manufactured into an annular blank through an annular rolling blank making method, and the outer diameter of the annular blank is 0.95-1 time the outer diameter of the small end of a target inclined L-shaped annular piece; the wall thickness of the annular blank is 1.3-1.5 times the wall thickness of the target inclined L-shaped annular piece, and the height of the annular blank is 0.9-1 time the height of the target inclined L-shaped annular piece; the annular blank is pre-forged into an inverted-isosceles-trapezoid hollow annular blank through a preforging blank making method, and the included angle between the inverted-trapezoid side edge and the trapezoid short bottom edge is 3-20 degrees; the large end outer diameter is the large end outer diameter of the target inclined L-shaped annular piece, and the small end outer diameter is the small end outer diameter of the target inclined L-shaped annular piece; a flange structure is formed; machining and thermal treatment are conducted. According to the method, a gradual forming mode, especially the bottom flange structure manufactured by reverse extrusion forming, is adopted, the inclined L-shaped annular piece is complete in filament line, reasonable in distribution and high in structural strength, the forge quality and the material utilization rate are improved, in addition, the manufacturing cost is lowered, so the production method has wide application value.

Description

technical field [0001] The invention relates to a production method of a ring, in particular to a production method of an oblique L-shaped ring with a large height-to-diameter ratio. Background technique [0002] Rings are widely used in automotive, petrochemical, aerospace and other fields. The existing ring rolling production technology is generally suitable for rings with a height-to-diameter ratio of 0.6 or less, and rings with a large height-to-diameter ratio with tapers and flanges, due to It is not easy to balance the axial force in the ring rolling process, and it is very difficult to directly form ring rolling. The existing technical solution is to machine the bottom flange first and then form the bottom flange, which not only reduces the utilization rate of materials, wastes man-hours, increases production costs, but also cuts off the flow line of the forging to a certain extent, affecting the strength of the bottom flange. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00B23P2700/50
Inventor 刘国伟杨艳慧刘东
Owner 安徽汉正轴承科技有限公司