Square (round) hole sleeve for external locking mechanism of switch machine and powder metallurgy manufacturing method thereof
A technology of external locking and switch machines, which is used in the locking mechanism of turnouts, transportation and packaging, railway car body parts, etc. It can solve the problems of shock resistance, corrosion resistance, high and low temperature resistance, and hole sleeve reject rate High, poor friction performance and other problems, to achieve the effect of reducing resource and energy consumption, increasing friction contact area, and reducing wear
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Embodiment 1
[0047] Such as figure 1 and 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 lubrica...
Embodiment 2
[0050] Such as image 3 and 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 communic...
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] 3% of 200-mesh copper powder, 0.7% of 325-mesh graphite powder, 0.7% of 325-mesh ferromolybdenum powder, 0.4% of 400-mesh sulfur powder, 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 ...
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Abstract
Description
Claims
Application Information
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