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Square (circular) hole sleeve for external locking mechanism of point machine and powder metallurgy manufacture method thereof

A technology of powder metallurgy and manufacturing method, which is applied in the field of square (round) hole sleeves for external locking mechanisms of switch machines and the field of powder metallurgy manufacturing thereof, which can solve the problem of poor shock resistance, corrosion resistance, high and low temperature resistance, and hole sleeve waste products. It can reduce the consumption of resources and energy, increase the frictional contact area, and reduce the wear and tear.

Active Publication Date: 2015-03-11
太原利丰金盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the deficiencies of the prior art. What is to be solved is the problem of poor friction performance and easy cracking caused by the structure of the hole sleeve itself, the problem of poor wear resistance of the existing hole sleeve material, and the high reject rate of the hole sleeve prepared by the existing method , the problem of poor shock resistance, corrosion resistance and high and low temperature resistance

Method used

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  • Square (circular) hole sleeve for external locking mechanism of point machine and powder metallurgy manufacture method thereof
  • Square (circular) hole sleeve for external locking mechanism of point machine and powder metallurgy manufacture method thereof
  • Square (circular) hole sleeve for external locking mechanism of point machine and powder metallurgy manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 with figure 2 As shown, the circular socket for the external locking mechanism of the switch machine includes the socket body 1 and the socket seat 2, the outer contour of the socket body 1 is cylindrical, and the external contour of the socket seat 2 is cuboid. And the cross-section of the cuboid shape is square and the thickness is less than the square side length; the hole sleeve body 1 is arranged on the square end face of the hole sleeve seat 2, and the hole sleeve body 1 and the hole sleeve seat 2 are integrally formed; The main body 1 is provided with a through hole 3 in the axial direction, and a circular cavity is opened in the middle of the hole sleeve 2, and the diameter of the circular cavity is larger than the diameter of the through hole 3 and the two are coaxial; the through hole 3 The cross-section is rectangular; the side of the socket seat 2 is provided with a lubricating oil hole 5 communicating with the circular cavity, the lubric...

Embodiment 2

[0050] Such as image 3 with Figure 4As shown, the square socket for the external locking mechanism of the switch machine includes a socket body 1 and a socket seat 2. The outer contour of the hole socket body 1 is cylindrical, and the external contour of the hole socket seat 2 is cuboid. And the cross-section of the cuboid shape is square and the thickness is less than the square side length; the hole sleeve body 1 is arranged on the square end face of the hole sleeve seat 2, and the hole sleeve body 1 and the hole sleeve seat 2 are integrally formed; The main body 1 is provided with a through hole 3 in the axial direction, and a circular cavity is opened in the middle of the hole sleeve 2, and the diameter of the circular cavity is larger than the diameter of the through hole 3 and the two are coaxial; the through hole 3 The cross section is a rectangle with four-corner circular arc transition; the side of the socket seat 2 is provided with a lubricating oil hole 5 communi...

Embodiment 3

[0053] The preparation method of the round hole sleeve described in embodiment 1 includes batching, pressing, sintering, vacuum oil immersion, fine shaping and machining, specifically made according to the following steps:

[0054] 1) Raw material and weight percentage ratio

[0055] 200-mesh copper powder 3%, 325-mesh graphite powder 0.7%, 325-mesh ferromolybdenum powder 0.7%, 400-mesh sulfur powder 0.4%, and the balance is 80-mesh iron powder;

[0056] 2) Pressed blank

[0057] Mix the raw materials in step 1) and put them into the mold cavity designed according to the structure of the square hole sleeve or the round hole sleeve, and press the blank under a pressure of 560Mpa;

[0058] 3) Sintering

[0059] Sinter the pressed product in an atmosphere of decomposed ammonia with a dew point of 40°C, the sintering temperature is 1120±10°C, and the time is 120min;

[0060] 4) Vacuum immersion oil

[0061] The vacuum degree is 0.1MPa, the temperature is 40°C, and the oil imme...

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Abstract

The invention relates to parts for rail transit point equipment, specifically relates to a square hole sleeve and a circular hole sleeve for an external locking mechanism of a point machine, relates to a method for manufacturing the square hole sleeve or the circular hole sleeve by utilizing a powder metallurgy method, and solves the problems that the hole sleeve is poor in friction performance and is easily crushed due to the own structure, the abrasive resistance of the existing hole sleeve material is poor, and the hole sleeve prepared according to the existing method is high in defective index, and is poor in shock resistance, corrosion resistance and high low temperature resistance. The employed technical scheme is that the structure of the hole sleeve is improved as a through hole which is adaptive to the outer contour of an actuating rod or an indicating rod; the hole sleeve is manufactured by utilizing the powder metallurgy method; the manufacture process comprises batching, pressing, sintering, vacuum oil immersion, precise shaping and machining; employed raw materials comprise 2-5% of copper powder, 0.5-1% of graphite powder, 0.5-1% of ferro-molybdenum powder, 0.2-0.6% of sulfur powder and the balance of ferrous powder in terms of weight percentage.

Description

technical field [0001] The invention relates to parts for rail transit switch equipment, in particular to square hole sleeves and round hole sleeves for the external locking mechanism of switch machines, and to a method for preparing the square hole sleeves or round hole sleeves by powder metallurgy. Background technique [0002] The switch machine is the executive mechanism of the turnout control system. It is installed next to the rail line and is used to switch and lock the point rail or core rail of the switch, and express the position and state of the switch point rail or core rail in the supervision interlocking area. Its external locking mechanism is a device that can convert the turnout and directly lock the close-fitting point rail of the turnout with the basic rail, the center rail and the wing rail, and at the same time keep the repelling point rail at the standard opening position, which is the equipment to ensure the railway transportation. One of the important ...

Claims

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Application Information

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IPC IPC(8): B61L5/10B22F1/00B22F5/10
Inventor 贾欣志王连成赵建平王济
Owner 太原利丰金盛科技有限公司
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