[introduction] valve fluid pipeline control device, it is used to cut and connect the line of medium, medium pressure and flow regulation, change the direction of media flow and the protection of the safe operation of equipment or piping system. With the development of modern science and technology, industry and all aspects of people's life, the increasingly widespread application of fluid pipe on the valve needs more and more big, now has become a general valve valve is widely used in manufacturing industry. So how is the valve made?
First, the valve body
The valve body (casting, sealing surface surfacing) casting (according to standard) "" "incoming inspection (according to standard)" "" "" "groove welding ultrasonic testing (according to the drawings)" "" welding and post welding heat treatment "" "" "finishing" "" "grinding the sealing surface of the sealing surface hardness testing, penetrant inspection
Two, valve parts manufacturing processes
1, need to weld the sealing surface of the inner parts, such as valve, valve seat, etc.
The purchase of raw materials (standard) "" "incoming inspection (according to standard)" "" blank production (steel or forging drawings according to process requirements) "" "rough machining ultrasonic surface (drawing requirements)" "" "" "roughing groove welding welding and post welding heat treatment" "" the finishing Department "" "" "" seal the sealing surface grinding surface hardness testing, penetrant inspection
2, stem
The purchase of raw materials (standard) "" "incoming inspection (according to standard)" "" blank production (steel or forging drawings according to process requirements) "" "" "" roughing groove welding welding and post welding heat treatment "" "" "" finishing the grinding "" "the stem surface treatment (quenching and nitriding, chemical plating)" "" the final processing (polishing and grinding) "" "" "" seal the sealing surface grinding surface hardness testing, penetrant inspection
3, do not need to weld the inner parts of the sealing surface and so on.
The purchase of raw materials (standard) "" "incoming inspection (according to standard)" "" blank production (steel or forging drawings according to process requirements) "" "rough machining ultrasonic surface (drawing requirements)" "" finishing department
Three, fasteners
Fastener manufacturing standard DL439-1991: the purchase of raw materials (standard) "" "incoming inspection (according to standard)" "" blank production (steel or forging drawings according to process requirements) and sampling necessary test "" "" "" rough "" finishing "spectrum test
Four, assembly
Receive parts "" "" "" cleaning, cleaning rough assembly (by drawing) "" "pressure test (according to the drawings, process)" "" qualified, open and clean "" "" "" the final assembly and Denso debugging (or actuator of electric valve) "" "paint packaging" "shipment"
Five, production and inspection process
1, the company's procurement of raw materials of various specifications
2, with the spectral analysis of the raw materials for the material testing, and print out the raw material testing report for backup
3, with the next machine for raw material cutting
4, inspection personnel inspection of raw materials, cutting diameter and length
5, forging workshop for forging molding processing of raw materials
6, inspection personnel on the formation of a variety of dimensions of the test
7, workers in the removal of blank
8, throwing sand workers on the rough surface blasting
9, inspection staff after sandblasting surface treatment inspection
10, workers for rough machining
11, valve sealing thread processing, "" the staff in the processing of inspection and inspection personnel on the product after processing inspection
12, the valve body connected with the thread processing
13, in the hole processing
14, inspection personnel to carry out the total inspection
15, qualified semi-finished products were sent to the warehouse
16, semi-finished products for electroplating
17, semi finished electroplating surface treatment inspection
18, all kinds of accessories (ball, stem, sealing valve seat) test
19, assembly workshop for product assembly — assembly line inspection personnel to test the product
20, after the assembly of the products through the pressure test and drying into the next process
21, assembly shop for product packaging - packaging line inspection personnel on the product sealing performance, appearance, torque test. Unqualified products are not allowed to be packaged
22, the qualified products are bagging and sent to the warehouse
23, all inspection records will be stored in the computer to be stored in the computer for inquiry
24, qualified products through the container was sent to the domestic and foreign
Process equipment network finishing release, reproduced please indicate the source.