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Cold extrusion forming process for nozzle needle valve body

A forming process and needle valve body technology, applied in the direction of valve devices, manufacturing tools, metal processing equipment, etc., can solve problems such as difficult deformation, achieve the effect of complete metal streamline, easy automatic production, and high material utilization rate

Pending Publication Date: 2018-11-16
TAICANG JIUXIN PRECISION MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the main difficulty is that the tip size D4 is only less than 20% of D1, converted into area, the area of ​​the tip part is only about 3% of the diameter of the big end, it is difficult to deform, so it is mainly processed by traditional machining method

Method used

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  • Cold extrusion forming process for nozzle needle valve body
  • Cold extrusion forming process for nozzle needle valve body
  • Cold extrusion forming process for nozzle needle valve body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] Using a circular saw to cut the blank to obtain the blank 10, then chamfering the two ends of the blank 10, and subjecting the blank 10 to annealing, shot blasting and lubrication;

[0054] (a) cold finishing

[0055] Use a circular saw to saw the blank and cut it to get the blank, and then pretreat the blank, the pretreatment is to chamfer the two ends of the blank, and anneal, shot blast and lubricate the blank ;

[0056] The pretreated blank 10 is placed in the cavity formed by the first core A12 and the second core A13, the punch A11 is located on one side of the blank 10, and the ejector pin A16 is located on the other side of the blank 10 and is connected with the The blanks are offset, and the punch A11 moves toward the blank along with the slider of the pressure forming machine, so that the two ends of the blank 10 are forged and flattened. After the forging is completed, the blank 10 is ejected through the ejector rod A16;

[0057] (b) Positive extrusion rod ...

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Abstract

The invention discloses a cold extrusion forming process for a nozzle needle valve body. The process specifically includes the steps of cold finishing, forward extrusion of a rod part, extrusion of amiddle end diameter part, extrusion of a tip end part and formation of the tip end part. By means of the process, the metal streamline is continuous and is not cut through machining, the product performance is improved, the production efficiency is improved, and the utilization rate of materials is increased.

Description

technical field [0001] The invention relates to the technical field of auto parts production, in particular to a cold extrusion forming process for a needle valve body of an oil injector. Background technique [0002] The fuel injector sprays gasoline directly into the cylinder, and the injected gasoline forms a mist, mixes with air, and is ignited by the spark plug. The mixture of ignited gasoline and air pushes the piston to do work. The main function of the fuel injector is to atomize the fuel under high pressure and inject it into the combustion chamber to form a combustible mixture. As an actuator, the needle valve body of the fuel injector must withstand a high pressure of more than 250MPa, and must continuously withstand the influence of alternating pressure loads and alternating temperatures. The part itself has extremely high quality requirements, with small thermal deformation, impact resistance, Good fatigue resistance [0003] In the prior art, traditional mach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/02B21J5/06B21J13/02B21K1/20
CPCB21J5/002B21J5/02B21J5/06B21J13/02B21K1/20
Inventor 郑英俊
Owner TAICANG JIUXIN PRECISION MOLD
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