Manufacturing technology of individual hydraulic prop piston

Abstract

The invention relates to a manufacturing technology of an individual hydraulic prop piston, which comprises the following steps of: a. blanking; b. heating a steel billet blanked to a temperature between 900 DEG C and 1,200 DEG C; c. completing billet manufacturing of the heated steel billet on mechanical billet manufacturing equipment; d. forging the billet manufactured on a friction press in a closed manner; e. heat-treating a piston forge piece forged by using surplus heat from forging; and f. one-step finishing the manufacturing of the piston forge piece heat-treated by processing on a rough and fine machine. The invention utilizes the closed type die forging of the friction press (or metal forming machineries of other types) to replace fitting piston blanks of coal mine individual hydraulic prop of laminated spring hammer blocker-type forging with high energy consumption, low production efficiency and poor technical equipment, thus being capable of saving raw materials, improving production efficiency and reducing production cost. The use of surplus heat from the forging of piston blanks for heat treatment not only satisfies the requirements on hardness, but also reduces production cost.

Description

technical field [0001] The invention relates to a piston production process, in particular to a single hydraulic prop piston production process. Background technique [0002] At present, the accessory pistons of coal mine single hydraulic props (such as figure 1 Shown) the production process is as follows (take the production of DW type as an example): [0003] Purchase round steel or square steel → blanking (2.2 ~ 2.3KG) → heating the billet to 1100 ~ 1250°C with a fuel furnace → die forging with a splint hammer → rough machining on a lathe → heat treatment → finishing on a lathe. [0004] The problems existing in the current piston production process are as follows: [0005] 1. Use outdated forging equipment - splint hammer (equipment with high energy consumption and poor precision); use die forging technology that is not suitable for mass production - tire die forging to produce piston blanks for single hydraulic props, piston blank size, weight The control is not good...

AI Technical Summary

Problems solved by technology

[0005] 1. Use outdated forging equipment - splint hammer (equipment with high energy consumption and poor precision); use die forging technology that is not suitable for mass production - tire die forging to produce piston blanks for single hydraulic props, piston blank size, weight The control is not good, resulting in the use of more steel (2.2 ~ 2.3KG)

The tooling molds for forging pistons used are all manually operated, and the labor intensity of the operators is very high, resulting in low production efficiency

[0006] 2. In order to reduce the cost of machining and heat treatment resistance, the piston is subjected to heat treatment after rough machining (heating at 800~860°C, holding for a period of time, quenching with tap water or aqueous solution, and tempering at 500~570°C for 1.5~5 hours), resulting in piston Unstable hardness, piston product quality is not high

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