CN202901264U

CN202901264U - Integrated hydraulic tappet plunger piston and mold thereof

Info

Publication number: CN202901264U
Application number: CN 201220408296
Authority: CN
Inventors: 朱宝华
Original assignee: Hangzhou XZB Tech Co Ltd
Current assignee: Hangzhou XZB Tech Co Ltd
Priority date: 2012-08-17
Filing date: 2012-08-17
Publication date: 2013-04-24
Anticipated expiration: 2022-08-17

Abstract

The utility model belongs to the technical field of cold forming and particularly relates to an integrated hydraulic tappet plunger piston and a mold thereof in hydraulic lash adjusters in automobile engines. The plunger piston comprises a cylindrical body, one end of the body is a hemispheric sphere portion, the middle of the body is a rod portion, and the other end of the body is a main body portion. A first annular groove is arranged between the sphere portion and the rod portion, a second annular groove is arranged between the rod portion and the main body portion, and a fluid port is arranged in the second annular groove. The plunger piston is characterized in that the sphere portion, the rod portion and the main body portion are integrally molded and equal in wall thickness. The mold comprises a movable mold and a static mold, and is characterized in that the movable mold and the static mold comprise a middle clamping groove, wherein the diameter of the middle clamping groove is consistent with that of a plunger piston parison. The surface of the static mold is provided with a boss used for roller forming of the first annular groove and the second annular groove, the boss is provided with a gradually-changed non-proportional diminishing surface, and the formula of a diminishing surface curve is: Y = -s q r (x<0.2>) +1, wherein x (1) is equal to 1, and x (2) is equal to 50. With the scheme, investment in plunger piston production equipment can be reduced, plunger piston productive efficiency can be improved, and compared with a plunger piston in the prior art, the obtained plunger piston is high in overall strength and long in service life.

Description

Integral hydraulic tappet plunger and mould thereof

Technical field

The utility model belongs to the cold forming technical field, is specifically related to part---Integral hydraulic tappet plunger and mould thereof in the interior hydraulic lash adjuster of a kind of motor car engine.

Background technique

Hydraulic tappet: body, plunger, steel ball, keep-spring, support, returning spring form, has auto-compensation valve clearance effect (gap adjustment during engine assembly when the gap adjustment of valve train assembling variable, motor thermal change, the gap adjustment of motor loss, gap adjustment can be eliminated the noise between the air valve part automatically, need not to carry out the gap adjustment of valve train again).Because product is hydraulic piston spare, so very high to external dimension and the type position tolerance of product.

Existing hydraulic tappet piston structure and processing technology are divided into following two kinds:

1, split type plunger

Split type plunger is exactly the respectively machine shapings of two parts of production sharing.

Advantage: split type plunger is because be comprised of two parts, so difficulty of processing reduces when processing single part separately.

Shortcoming: need to process respectively these two parts.Manufacturing mechanism will be at double increase, the particularly requirement of two product counterfaces very high, if when two two sides are uneven, can cause product to tilt, and then cause product holding in body, affect the use function of product.

2, moulding mill or car moulding plunger

Moulding mill or car moulding plunger refer to that boundary dimension finishes by form grinding or turning moulding processes.

Moulding mill processing advantage: Product Precision is high, easily control.

Moulding mill imperfect manufacture: equipment investment is large, and the processing beat is slow, reduces product rigidity, the waste material.Turning moulding processing advantage: difficulty of processing is low.

Turning moulding imperfect manufacture: equipment investment is large, and the processing beat is slow, and the product size change is large, reduces product rigidity, the waste material.

Summary of the invention

The purpose of this utility model is to provide a kind of simple in structure guaranteeing that product uses under the prerequisite of function, and machine shaping is integral type plunger and processing mold thereof easily, and this scheme can reduce the input of plunger manufacturing mechanism, improves the prouctiveness of plunger.The integral type plunger that obtains has higher bulk strength and working life with respect to the plunger of prior art.

For achieving the above object, the utility model adopts following technological scheme:

Integral hydraulic tappet plunger, comprise a body cylindraceous, body one end is half spherical bulb, the centre is bar section, and the other end is main part, contains the first annular groove between bulb and the bar section, contain the second annular groove between bar section and the main part, the second annular groove includes a fluid flow port, it is characterized in that described bulb, bar section and main part are one-body molded, and three's wall thickness all equates.

The mould that is used for processing Integral hydraulic tappet plunger, comprise dynamic model and quiet mould, it is characterized in that described dynamic model and quiet mould contain the diameter middle draw-in groove consistent with plunger base type diameter, wherein, quiet mould surface contains the boss that is useful on first ring groove and the second annular groove roll forming, this boss is the not geometric ratio face that successively decreases of gradual change, and the surface curve formula that successively decreases is: Y=-sqr (x^0.2)+1; X1=1, x2=50.

Described quiet mould contains the guide ramp (seeing 30 among Fig. 6) that is useful on the correct middle draw-in groove in place of guide post plug base type.

Compare with moulding mill or car moulding plunger with split type plunger, plunger integral structure of the present utility model and whole roll forming technology beneficial effect are:

1, manufacturing mechanism drops into little.

2, good product consistency.

3, material requested reduces, and reduces cost of material.

4, reduce production technology, reduce cost of human resources.

5, avoid product because be the split type holding that may cause.

Description of drawings

Fig. 1 is split type plunger

Fig. 2 is moulding mill or car moulding plunger

Fig. 3 is plunger base type of the present utility model;

Fig. 4 is whole roll forming schematic diagram;

Fig. 5 is integral type plunger finished figure.

Fig. 6 is the utility model plunger roll forming structural representation.

Wherein, plunger body 1, dynamic model 2, quiet mould 3, middle draw-in groove 4, bulb 11, bar section 12, main part 13, the first grooves 14, the second grooves 15, fluid flow port 16, lead-in chamfered 30, boss 31, gradual change is the geometric ratio face 32 that successively decreases not.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described further.

This programme integrated pole plug structure as shown in Figure 5, plunger body 1 is comprised of bulb 11, bar section 12 and main part 13, three's consistency of thickness is formed by plunger base type shown in Figure 3 roll extrusion.

The forming process of integral type plunger is in two steps:

At first be the extrusion modling of part, make a plunger base type (Fig. 3), its size and precision are controlled assurance by cold upsetting die of car;

Second step is the roll extrusion (Fig. 4) of plunger blank, utilizes thread-rolling machine roll forming principle, does two block forming dies (dynamic model 2 and quiet mould 3), and plunger base type to be processed is placed between dynamic model 2 and the quiet mould 3.There is guide ramp 30 quiet mould 3 ingress, enter mould to help plunger base type, and quiet mould 3 is static, and dynamic model 2 moves from left to right.

In dynamic model 2 movement processes, (side guide is static because be subjected to two side guides for plunger base type, other side guide motion, namely be dynamic model and quiet mould) extruding and to the left and right both direction extend, again because be subject to the position-limiting action of middle draw-in groove 4, cause product integral body not extend up or down, but extend to both direction respectively.

At this moment, quiet mould 3 boss 31 height designs are the not geometric ratio face 32 that successively decreases of gradual change, modification amount in the time of can sponging the roll extrusion of plunger base type, top ball, 11 become because of the extension of product full, at this moment product pastes mould fully, guarantees overall size and the mould-forming consistent size (seeing Fig. 6) of product.

Claims

1. Integral hydraulic tappet plunger, it is characterized in that this plunger comprises a body cylindraceous, body one end is half spherical bulb, the centre is bar section, and the other end is main part, contains the first annular groove between bulb and the bar section, contain the second annular groove between bar section and the main part, the second annular groove includes a fluid flow port, and described bulb, bar section and main part are one-body molded, and three's wall thickness all equates.

2. be used for processing the as claimed in claim 1 mould of Integral hydraulic tappet plunger, comprise dynamic model and quiet mould, it is characterized in that described dynamic model and quiet mould contain the diameter middle draw-in groove consistent with plunger base type diameter, wherein, quiet mould surface contains the boss that is useful on first ring groove and the second annular groove roll forming, this boss is the not geometric ratio face that successively decreases of gradual change, and the surface curve formula that successively decreases is: Y=-sqr (x^0.2)+1; X1=1, x2=50.

3. the mould of described Integral hydraulic tappet plunger according to claim 2, it is characterized in that described quiet mould contain be useful on guide post plug base type correct in place in the middle of the guide ramp of draw-in groove.