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Integrated hydraulic tappet plunger and integral roller forming method thereof

A hydraulic tappet and roll forming technology, applied in the direction of plungers, pistons, cylindrical pistons, etc., can solve the problems of large product size changes, lower product stiffness, and large equipment investment, so as to achieve small production equipment investment and material reduction , reduce the effect of the production process

Active Publication Date: 2012-11-21
HANGZHOU XZB TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Disadvantage: need to process these two parts separately
[0011] Disadvantages of forming grinding processing: large investment in equipment, slow processing cycle, reduced product rigidity, and waste of materials
[0012] Disadvantages of turning forming processing: large investment in equipment, slow processing cycle, large changes in product size, reduced product rigidity, and waste of materials

Method used

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  • Integrated hydraulic tappet plunger and integral roller forming method thereof
  • Integrated hydraulic tappet plunger and integral roller forming method thereof
  • Integrated hydraulic tappet plunger and integral roller forming method thereof

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Effect test

Embodiment Construction

[0035] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] The integral plunger structure of this scheme is as follows: Figure 5 As shown, the plunger body 1 is composed of a ball portion 11, a rod portion 12 and a main body portion 13, and the thickness of the three is the same. image 3 Plunger blanks shown are rolled.

[0037] The molding process of the one-piece plunger is divided into two steps:

[0038] The first is the extrusion molding of the parts to make a plunger blank ( image 3 ), its size and precision are controlled and guaranteed by the cold heading die;

[0039] The second step is the rolling of the plunger blank ( Figure 4 ), use the rolling forming principle of the thread rolling machine to make two forming molds (moving mold 2 and static mold 3), and place the plunger blank to be processed between the moving mold 2 and the static mold 3. There is a guide slope 30 at...

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Abstract

The invention belongs to the technical field of cold forming, and particularly relates to an integral roller forming method of an integrated hydraulic tappet plunger in a hydraulic gap adjuster in an automobile engine. The integrated hydraulic tappet plunger comprises a cylindrical body, one end of the body is a hemisphere, a rod is arranged in the middle of the body, the other end of the body is a main portion, a first circular groove is arranged between the hemisphere and the rod, a second circular groove is arranged between the rod and the main portion, and a fluid opening is arranged in the second circular groove. The integrated hydraulic tappet plunger is characterized in that the hemisphere, the rod and the main portion are integrally formed, and the wall thicknesses of the hemisphere, the rod and the main portion are equal. The integrated hydraulic tappet plunger and the processing forming method have the advantages that the integrated hydraulic tappet plunger is simple in structure and is processed and formed conveniently, investment of plunger production equipment can be reduced according to the scheme, production efficiency of the plunger is improved, and the produced integrated plunger is higher in integral strength and longer in service life as compared with a plunger in the prior art.

Description

technical field [0001] The invention belongs to the technical field of cold forming, and in particular relates to an integral rolling forming method of an integral hydraulic tappet plunger, which is a part of a hydraulic gap adjuster in an automobile engine. Background technique [0002] Hydraulic tappet: composed of body, plunger, steel ball, holding spring, bracket, and return spring, it has the function of automatically compensating the valve clearance (the clearance adjustment of the assembly variable of the valve mechanism during engine assembly, the clearance adjustment of the engine heat change, and the engine loss. Clearance adjustment, automatic clearance adjustment can eliminate the noise between the valve parts, no need to adjust the clearance of the valve mechanism). Because the product is a hydraulic piston, the requirements for the product's external dimension and positional tolerance are very high. [0003] The existing hydraulic tappet plunger structure and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J1/00F01L1/245B21H1/00
Inventor 朱宝华
Owner HANGZHOU XZB TECH
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