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Production technology for left valve barrel of colliery three-purposed hydraulic valve

A production process and hydraulic valve technology, which is applied in the production process field of the left valve cylinder of the coal mine three-purpose hydraulic valve, can solve the problems of increased production cost, low production efficiency, waste of raw materials, etc., to save steel, improve production efficiency, save The effect of social resources

Inactive Publication Date: 2011-05-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 1. Direct machining with round steel with a diameter of 50mm wastes raw materials and increases production costs;
[0013] 2. Low production efficiency

Method used

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  • Production technology for left valve barrel of colliery three-purposed hydraulic valve
  • Production technology for left valve barrel of colliery three-purposed hydraulic valve
  • Production technology for left valve barrel of colliery three-purposed hydraulic valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 (Taking the left valve barrel of the DZF coal mine three-purpose hydraulic valve as an example)

[0036] Purchase round steel with a diameter of 45mm; blank 1.35KG; heat to 1120-1200°C with a 250kw medium-frequency induction furnace; thickly remove scale on a 63-ton punch, and make a billet; put it on a 250-ton punch for high-temperature back extrusion, high temperature back extrusion forging see figure 2 ;Punch off the high-temperature reverse-extrusion forging with skin on a 63-ton punch press; then put it on a 160-ton high-speed hydraulic press for closed-type forging, see closed-type forging forging image 3 ;The temperature of the forging is measured by an infrared thermometer. If it is higher than 750°C, it is quenched and cooled by spraying water mist with high-pressure air on the quenching line. When it is cooled to 300-400°C, stop spraying water mist for cooling. After cooling to room temperature, the forging is Heating in well-type tempering fu...

Embodiment 2

[0037] Embodiment 2 (Take the left valve barrel of the DZF coal mine three-purpose hydraulic valve as an example)

[0038] Purchasing round steel with a diameter of 45mm; blanking 1.4KG; heating to 1120-1200°C with a gas furnace; rough descaling, billet making, and high-temperature reverse extrusion on the FP-400 CNC electric screw press; on a 63-ton punching machine Wash away the back-extruded joint skin; put it on a 200-ton punch press for closed-type forging again; measure the temperature of the forgings with an infrared thermometer, and quench and cool them with oil if the temperature is higher than 750 ° C. After cooling to room temperature, the forgings are returned in the well Furnace at 500-540°C, heat preservation for 1-1.5 hours and tempering; CNC lathe finishing turning, milling machine processing, fitter and other processes.

Embodiment 3

[0039] Embodiment 3 (Taking the left valve cylinder of the DZF coal mine three-purpose hydraulic valve as an example)

[0040] Purchase round steel with a diameter of 45mm; blank 1.35KG; use a 250kw medium frequency induction furnace to heat to 1120-1200°C; pier rough descaling on a 63-ton punching machine and make a billet; put it on a 250-ton fast hydraulic press for high-temperature reverse extrusion; Punch off the joint skin of the reverse extrusion forging on the 63-ton punching machine; put it on the 160-ton fast hydraulic press for closed forging again; wash off the internal skin on the 63-ton punching machine; forgings are treated with high-pressure air-cooling and heat treatment; Fitters and other processes.

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PUM

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Abstract

The invention relates to a production technology for a left valve barrel of a colliery three-purposed hydraulic valve, comprising the steps of discharging round steels, and heating up the round steel to 1120-1200 DEG C; removing scales by a punching machine, and blanking; reversely squeezing at a high temperature on a press machine; punching away wads of high-temperature reversely squeezed forge pieces by the punching machine; forging again by the press machine in a closed manner; carrying out heat treatment on the forging excess heat; finely turning by a numerically controlled lathe, processing and clamping by a milling machine; and finishing the manufacture to obtain finished products. In the invention, the press machine is used for finely forging the profile of the left valve barrel of the colliery three-purposed hydraulic valve, so that massive production is convenient. The technology of the invention is used for displacing a traditional old technology, so that steel materials are saved; the production efficiency is improved by three times; and the production cost is reduced. By using the technology in the invention, the production cost of the left valve barrel of each DZF colliery three-purposed hydraulic valve can be reduced ** Yuan; in each year, 6-7 million of three-purposed hydraulic valves for collieries are produced in China, so that ** Yuan of social resources can be saved.

Description

[0001] technical field [0002] The invention relates to a production process of a left valve barrel of a coal mine three-purpose hydraulic valve. Background technique [0003] At present, the production of coal mine three-purpose hydraulic valve left valve barrel (take DZF type as an example) is directly machined with round steel with a diameter of 50mm. [0004] Its production process is as follows: (see the finished product diagram of the left valve barrel of the coal mine three-purpose hydraulic valve figure 1 ) [0005] a. Use round steel with a diameter of 50mm, and feed 1.64kg; [0006] b. Rough turning on lathe, drilling on drilling machine; [0007] c. Heat treatment [0008] d. Semi-finishing car; [0009] e. Fine turning, milling machine processing, fitter; [0010] f. Finished product [0011] There are following deficiencies in the above-mentioned process technology: [0012] 1. Direct machining with round steel with a diameter of 50mm wastes raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 任旭芳刘加强
Owner SHANDONG UNIV
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