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A Steering Arm with a Long Axis Hole and Its Precision Forming Process

A steering arm and hole type technology, which is used in steering steering with rudders, ship construction, ships, etc., can solve the problems of low yield and difficult forging of long-axis steering arms with holes, so as to achieve long service life and improve efficiency. and accuracy, the effect of increasing the yield

Active Publication Date: 2020-09-22
昆山众诚精密锻造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a long-axis hole-containing steering arm and its precision forming process in order to solve the technical problems that the forging of the existing long-axis hole-containing steering arm is difficult and the yield rate is low.

Method used

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  • A Steering Arm with a Long Axis Hole and Its Precision Forming Process
  • A Steering Arm with a Long Axis Hole and Its Precision Forming Process
  • A Steering Arm with a Long Axis Hole and Its Precision Forming Process

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A forging process for a steering arm of a ship with a long axis and a hole, comprising the following steps:

[0032] Heating: The φ45 rod is sawed into a φ45x154mm rod blank, and the rod blank is heated to 1150°C by medium frequency induction; the rod blank contains the following components by weight: 0.46wt% carbon, 0.37wt% silicon , 0.50wt% manganese, 1.20wt% chromium, 0.15wt% molybdenum, 1.3wt% nickel, 1.5wt% tungsten, 1.3wt% cobalt, and the rest is iron.

[0033] Partial upsetting: Insert one end of the bar blank into the die hole, upsetting the bar blank from 154mm to 124mm axially, the upsetting temperature is controlled at 1100℃~1150℃, the depth of the die hole is 39cm, and the diameter of the die hole meets The dimensions required for the steering arm shaft;

[0034] Flattening: the upsetting part of the bar blank is flattened from 45mm to 35mm, and the flattening temperature is controlled at 1050°C to 1100°C to obtain a preformed blank;

[0035] Pre-forging: ...

Embodiment 2

[0042] A forging process for a steering arm of a ship with a long axis and a hole, comprising the following steps:

[0043] Heating: The φ45 rod is sawed into a φ45x154mm rod blank, and the rod blank is heated to 1200°C by medium frequency induction; the rod blank contains the following components by weight: 0.54wt% carbon, 0.17wt% silicon , 0.80wt% manganese, 0.90wt% chromium, 0.3wt% molybdenum, 0.85wt% nickel, 2.3wt% tungsten, 0.7wt% cobalt, and the rest is iron.

[0044] Partial upsetting: Insert one end of the bar blank into the die hole, upsetting the bar blank from 154mm to 115.5mm in the axial direction, the upsetting temperature is controlled at 1100 ° C ~ 1150 ° C, the depth of the die hole is 31 cm, the diameter of the die hole Meet the dimensions required for the steering arm shaft;

[0045] Flattening: the upsetting part of the bar blank is flattened from 45mm to 35mm, and the flattening temperature is controlled at 1050°C to 1100°C to obtain a preformed blank;

...

Embodiment 3

[0053] A forging process for a steering arm of a ship with a long axis and a hole, comprising the following steps:

[0054] Heating: The φ45 rod is sawed into a φ45x154mm rod blank, and the rod blank is heated to 1200°C by medium frequency induction; the rod blank contains the following components by weight: 0.5wt% carbon, 0.27wt% silicon , 0.60wt% manganese, 1.0wt% chromium, 0.25wt% molybdenum, 1.2wt% nickel, 1.8wt% tungsten, 1.1wt% cobalt, and the rest is iron.

[0055] Partial upsetting: Insert one end of the bar blank into the die hole, upsetting the bar blank from 154mm to 131mm in the axial direction, the upsetting temperature is controlled at 1100℃~1150℃, the depth of the die hole is 46cm, and the diameter of the die hole meets The dimensions required for the steering arm shaft;

[0056] Flattening: the upsetting part of the bar blank is flattened from 45mm to 35mm, and the flattening temperature is controlled at 1050°C to 1100°C to obtain a preformed blank;

[0057] ...

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Abstract

The invention relates to a long-shaft hole-formed turning arm and an accuracy forming technology thereof. The long-shaft hole-formed turning arm forming technology integrates the steps of feeding, intermediate-frequency sensing and heating, local upsetting, flattening, forging, hole punching and side cutting, shaping, homogenizing, and shot blasting, wherein the forging step further comprises thesteps of pre-forging and fine forging, and thus the problems that a connecting end part is hard to form and the shape of an inner hole in the connecting end is hard to control can be solved; after being heated in one time, a blank is gradually subjected to flattening, forging, hole punching and side cutting, shaping and other processes with waste heat, so that the heating times can be decreased, and the workpiece forming efficiency and accuracy can be improved; the homogenizing process is performed, so that a forging piece can gain a good metallographic structure, and uniform pearlite and ferrite at grade 1 and grain size at grade 8. According to the technology, the material of a bar blank is optimally designed, so that the obtained long-shaft hole-formed turning arm is high in mechanicalproperty, and high in toughness; and the hardness is more than 22HRC.

Description

technical field [0001] The invention relates to a long-axis hole-containing steering arm and its precision forming process, which belongs to the technical field of ship parts manufacturing. Background technique [0002] The steering arm is the key transmission part of the power steering gear. In order to make the steering arm shaft mesh with other steering gears, gear teeth need to be set on the steering arm shaft. At present, the steering arm of many ship steering systems is a structure with a long axis and a hole, which includes a steering arm shaft and an enlarged connecting end arranged at one end of the steering arm shaft. The middle part of the connecting end is an inner hole with gear teeth on the edge. . The working environment of the steering arm of a ship is harsh and requires high dimensional accuracy. However, due to the large width of the connecting end part relative to the steering arm shaft and the extremely complicated shape of the connecting end, forging is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B63H25/06B63H25/00
CPCB23P15/00B63H25/00B63H25/06
Inventor 周佑才王青青
Owner 昆山众诚精密锻造有限公司