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Hot riveting technique in use for piston rod

A technology of piston rod and hot riveting, applied in the direction of piston, cylindrical piston, plunger, etc., can solve the problems of high cost of precision steel pipe, many processes, difficulty in ensuring accuracy, etc., to reduce production cost, good connectivity, and reduce processing. The effect of the process

Inactive Publication Date: 2009-12-09
JIANGSU BRIGHT STAR SHOCK ABSORBER
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  • Abstract
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Problems solved by technology

[0002] There are two kinds of known motorcycle front shock absorber piston rods. One is that the piston head and the piston rod are integrated, and are formed by cold extrusion of precision steel pipes. The other is that the piston head and the piston rod are two bodies, and the piston head and the piston rod are connected by threads, and then the gaps in the thread connection are squeezed by cold stamping. Production management costs are also high

Method used

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  • Hot riveting technique in use for piston rod
  • Hot riveting technique in use for piston rod
  • Hot riveting technique in use for piston rod

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Embodiment Construction

[0010] according to figure 1 , figure 2 and image 3 Among them, the present invention discloses a hot riveting process for piston rods, which includes the following steps: step 1, first cutting the rod body 1 of the piston rod according to the required length; step 2, cutting the inner diameter of the rod body 1 after cutting Use a drill bit to ream the hole; step 3, shrink the diameter of the head of rod body 1 in step 2, which can reduce the diameter of the head; step 4, shrink the other head of rod body 1 and the piston in step 3 Put the head 2 into the induction furnace and heat it to 400°C-500°C; step 5, fill the cavity 3 inside the piston head 2, insert the rod body 1 heated in step 4 into the heated piston head 2 Insert the piston head 2 into the slot, and then punch the piston head 2. After stamping, squeeze the excess metal on the rod body 1 into the filling cavity 3 with the reference plane 4 positioned, and squeeze the filling cavity 3 tightly. After cooling, t...

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Abstract

A thermal riveting technology for piston rod includes such steps as cutting the piston rod short by required length, enlarging its hole, reducing the diameter of its head part, heating its another end and the piston with an internal cavity, inserting the rod body in piston, punching for squeezing its excessive metal into said internal cavity of piston, and cooling.

Description

technical field [0001] The invention relates to a hot riveting process for piston rods, which is suitable for processing the piston rods of motorcycle front shock absorbers. Background technique [0002] There are two kinds of known motorcycle front shock absorber piston rods. One is that the piston head and the piston rod are integrated and formed by cold extrusion of precision steel pipe. The other is that the piston head and the piston rod are two parts, and the piston head and the piston rod are connected by threads, and then the gaps in the thread connection are squeezed by cold extrusion. Production management costs are also high. Contents of the invention [0003] The invention provides a hot riveting process for piston rods, which not only has few manufacturing steps, but also has good connection and low manufacturing cost. [0004] The present invention adopts the following technical solutions: a hot riveting process for piston rods, which includes the following...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/10F16J1/12
Inventor 于桂华茆小元刘爱红龚双林贺阳孙国泰
Owner JIANGSU BRIGHT STAR SHOCK ABSORBER
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