Manufacturing method for valve plate of compressor

A manufacturing method and compressor technology, applied in the field of compressors, can solve the problems of high processing cost and low processing efficiency, and achieve the effects of high processing efficiency, improved efficiency and high product consistency

Active Publication Date: 2013-02-06
NBTM NEW MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process uses steel to process the valve plate, which has low processing efficiency and high processing cost

Method used

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  • Manufacturing method for valve plate of compressor
  • Manufacturing method for valve plate of compressor
  • Manufacturing method for valve plate of compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Design material composition: The composition of stainless steel powder in the valve plate is 0.6% carbon, 13% chromium, 0.5% manganese, 0.5% silicon, and less than 2% of unavoidable impurities, and the rest is iron.

[0029] 2) Mixing

[0030] The components are graphite powder: 0.7%; powder forming lubricant: 0.6%; SS410 stainless steel powder: 98.7% powder and mix evenly.

[0031] 3) Design the mold: design the powder metallurgy forming mold according to the product drawing in Fig. 1 .

[0032] 4) Molding: install the mold on the powder metallurgy molding press, and press the above mixed powder, the green density is 6.9g / cm 3 .

[0033] 5) Sintering: the sintering temperature is 1300° C. for 30 minutes.

[0034] 6) Quenching: Quenching the hardness of the valve plate to the design requirements.

[0035] 7) Tempering: Temper the quenched valve piece at 200°C for 2 hours.

[0036] 8) Processing: Preliminarily process the valve plate according to Figure 1.

[00...

Embodiment 2

[0040] 1) Design material composition: The composition of stainless steel powder in the valve plate is carbon: 0.8%, chromium: 17%, molybdenum: 1%, manganese: 0.5%, silicon: 0.5%, and less than 2% of unavoidable impurities, the rest for iron.

[0041] 2) Mixing

[0042] The components are graphite powder: 0.9%; powder forming lubricant: 0.6%; SS434 stainless steel powder: 98.5% powder and mix evenly.

[0043] 3) Design the mold: design the powder metallurgy forming mold according to the product drawing in Fig. 1 .

[0044] 4) Molding: install the mold on the powder metallurgy molding press, and press the above mixed powder, the green density is 6.7g / cm 3 .

[0045] 5) Sintering: the sintering temperature is 1280° C. for 30 minutes.

[0046] 6) Quenching: Quenching the hardness of the valve plate to the design requirements.

[0047] 7) Tempering: Temper the quenched valve piece at 200°C for 2 hours.

[0048] 8) Processing: Preliminarily process the valve plate according t...

Embodiment 3

[0052] 1) Design material composition: The composition of stainless steel powder in the valve plate is 0.6% carbon, 13% chromium, 0.5% manganese, 0.5% silicon, 2% nickel, and less than 2% of unavoidable impurities. for iron.

[0053] 2) Mixing

[0054] The components are graphite powder: 0.7%, powder forming lubricant: 0.6%, SS410 stainless steel powder: 94.7%, electrolytic copper powder: 2%, and carbonyl nickel powder: 2%. What needs to be explained here is that since the SS410 stainless steel powder does not contain Mo and Ni, we add about 2% nickel to meet the composition requirements of the stainless steel powder in the valve plate.

[0055] 3) Design the mold: design the powder metallurgy forming mold according to the product drawing in Fig. 1 .

[0056] 4) Molding: install the mold on the powder metallurgy molding press, and press the above mixed powder, the green density is 6.9g / cm 3 .

[0057] 5) Sintering: the sintering temperature is 1250° C. for 30 minutes.

[00...

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Abstract

The invention relates to a manufacturing method for a valve plate of a compressor. The manufacturing method sequentially comprises the following steps: (1) designing the composition of materials; (2) mixing; (3) designing a die; (4) forming; (5) sintering; (6) quenching; (7) tempering; (8) machining; (9) nitriding; and (10) finish machining. The manufacturing method has the advantages that firstly, the machining efficiency is improved, the die pressing method is adopted for powder metallurgy, the machining efficiency is higher, and the forming speed can reach over 15 pieces per minute; secondly, the utilization ratio of the raw materials is high. A large amount of leftover material is produced inevitably in the traditional machining method, the utilization ratio is low. However, the comprehensive utilization ratio is more than 95% in the powder metallurgy forming method; and finally, the product consistency is high. The size accuracy can be ensured completely by the die, the working allowance of blanks can be reduced. Meanwhile, the machining efficiency is improved. The frictional force between the valve plate and a roller sleeve is reduced after nitriding, and the abrasive resistance of the valve plate is improved.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a method for manufacturing a valve plate of a compressor. Background technique [0002] For the rotary compressor, it has the advantages of high efficiency, compact structure, small volume, light weight, etc., so this kind of compressor is widely used in air conditioners. The valve plate of the compressor is in close contact with the eccentric roller sleeve of the compressor. During use, it bears a certain pressure and slides on the roller sleeve at high speed, so the part of the valve plate in contact with the roller sleeve is prone to wear. For valve plates, a low coefficient of friction, high fatigue resistance and corrosion resistance are required. [0003] The existing patent publication number is CN 1424510 Chinese patent "Manufacturing method of a compressor sliding vane", which mainly includes the following steps (1) material selection: selecting suitable stainless steel mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F3/24C22C38/58C22C38/44C22C38/42C22C38/38C22C38/22C22C38/20C22C38/18C23C8/38C23C8/50F04C29/00
Inventor 包崇玺毛增光
Owner NBTM NEW MATERIALS GRP
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