CN211660889U

CN211660889U - Valve collet forming die

Info

Publication number: CN211660889U
Application number: CN202020117644.XU
Authority: CN
Inventors: 徐纳; 许雪权; 董华
Original assignee: Hangzhou XZB Tech Co Ltd
Current assignee: Hangzhou XZB Tech Co Ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-10-13
Anticipated expiration: 2030-01-19

Abstract

The utility model provides a valve collet forming die for valve collet's machine-shaping, includes lower die and last die, goes up the die below and is equipped with the moulded die drift, is located moulded die drift both sides, goes up the die below and is equipped with the cross-cut cutter, and moulded die drift upper portion is equipped with the drift of half cylinder type, goes up the die bottom and is equipped with the circular arc recess, has seted up a plurality of arcuation recesses on the drift outer diameter face, and drift outer diameter face both sides edge is equipped with outside and decurrent bulge. The utility model discloses improve moulded die drift design, the burr that produces when can be with stamping forming avoids, even there is the burr valve collet incision department, can not produce the jamming when valve collet and valve cooperate, guarantees that the valve is rotatory smooth and easy to avoid causing engine abnormal sound, trouble such as valve guide to sting.

Description

Valve collet forming die

Technical Field

The utility model relates to an engine parts makes technical field, in particular to valve collet forming die.

Background

The valve collet is an important part in an engine valve mechanism and plays a role in connecting a valve and a spring seat. In the existing valve lock clamp, in the punch forming process, a lock clamp section is firstly cut off, then the lock clamp section is formed by cold bending of a die, redundant waste materials are cut off, burrs are unavoidably generated at the joint of a valve lock clamp notch and an inner diameter surface, and as shown in fig. 7 and 8, due to the burrs, clamping stagnation is generated when the valve lock clamp is matched with a valve, the valve rotates unsmoothly, and then faults such as abnormal sound of an engine, seizure of a valve guide pipe and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve prior art's problem, provide a valve collet forming die, improve moulded die drift design, can avoid the burr that produces when stamping forming.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a valve collet forming die for valve collet's machine-shaping, includes lower die and last die, goes up the die below and is equipped with the moulded die drift, is located moulded die drift both sides, goes up the die below and is equipped with the cross-cut cutter, and moulded die drift upper portion is equipped with the drift of half cylinder type, goes up the die bottom and is equipped with the circular arc recess, has seted up a plurality of arcuation recesses on the drift outer diameter face, and drift semicircle outer diameter face both sides tip is equipped with outside and decurrent bulge. When the valve lock clamp is used for machining, the lock clamp section is formed by punching and cold bending the punch of the forming die and the upper female die, redundant parts are cut off by the two cross cutters, the convex-concave structure of the outer diameter surface of the punch enables the inner diameter surface of the valve lock clamp to form a corresponding convex-concave structure, a recess is formed at the joint of the tangent plane and the inner diameter surface on the valve lock clamp corresponding to the bulge, burrs are generated at the joint of the recess and the tangent plane, and the inner diameter surface of the valve lock clamp is avoided.

Preferably, the two side edges of the arc-shaped groove of the punch are provided with outwards and downwards extending convex parts, so that all the positions where the valve collet tangent plane is connected with the inner diameter surface form a concave part.

Preferably, the radius of the punch is R, the height of the protruding part is 0.1R, and the horizontal distance extending outwards from the semicircular outer diameter surface of the punch and the end part of the arc-shaped groove is 0.03R.

Preferably, the vertical distance of the downward extension of the convex part from the outer diameter surface of the punch semi-circle and the end part of the arc-shaped groove is 0.03R, namely, the convex part starts to protrude from the position of the vertical distance of 0.07R above the outer diameter surface of the punch semi-circle and the end part of the arc-shaped groove.

The beneficial effects of the utility model reside in that: the utility model discloses improve moulded die drift design, the burr that produces when can be with stamping forming avoids, even there is the burr valve collet incision department, can not produce the jamming when valve collet and valve cooperate, guarantees that the valve is rotatory smooth and easy to avoid causing engine abnormal sound, trouble such as valve guide to sting.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a front view of the forming punch of the present invention;

fig. 3 is a side view of a forming punch of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is an enlarged schematic view at B in FIG. 3;

FIG. 6 is an enlarged schematic view at C in FIG. 4;

FIG. 7 is a front view of the air door lock clip of the present invention;

FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7 and a partially enlarged schematic view (prior art);

fig. 9 is a cross-sectional view taken along direction D-D in fig. 7 and a partially enlarged schematic view (according to the present invention).

Detailed Description

The invention will be further explained by means of the following description and the attached drawings.

The implementation mode is as follows: as shown in fig. 1, the valve collet forming die is used for processing and forming a valve collet 100 and comprises a lower female die 2 and an upper female die 4, wherein a forming die punch 1 is arranged below the upper female die 4, and transverse cutters 3 are arranged on two sides of the forming die punch 1 and below the upper female die 4.

Referring to fig. 2-6, a semi-cylindrical punch 1.1 is arranged at the upper part of the punch 1 of the forming die, an arc groove is arranged at the bottom of the upper female die 4, a plurality of arc grooves 1.2 are arranged on the outer diameter surface of the punch 1.1, and outward and downward protrusions 1.3 are arranged at the end parts of the semi-cylindrical outer diameter surface of the punch 1.1 and the two sides of the arc groove 1.2. Wherein, the radius of the punch 1.1 is R, the height of the convex part 1.3 is 0.1R, the horizontal distance extending outwards from the outer diameter surface of the semi-circle of the punch 1.1 and the end part of the arc-shaped groove 1.2 is 0.03R, and the vertical distance extending downwards is 0.03R.

Through the punch forming of the die, the valve collet 100 is formed through cold bending and is provided with a plurality of grooves 101 on the inner diameter surface, and the difference from the prior art is that, as shown in fig. 7-8, for the existing valve collet 100, burrs 102 are generated at the joints of the notch, the inner diameter surface and the grooves 101, and the valve collet 100 and the valve are matched to generate the problems of clamping stagnation and unsmooth rotation, thereby causing the faults of abnormal sound of an engine, seizure of a valve guide pipe and the like. And as shown in fig. 7 and 9, through the utility model discloses a mould stamping forming can produce sunkenly in incision and inner diameter face and recess 101 junction, and burr 102 produces in sunken and tangent plane hookup location, has avoided valve collet inner diameter face and recess 101 to avoid producing with the valve and interfere.

The above description is only the specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, the present invention can be used in similar products, and any person skilled in the art is in the field of the present invention, and all the changes or modifications made are covered by the claims of the present invention.

Claims

1. The utility model provides a valve collet forming die for the machine-shaping of valve collet (100), its characterized in that: the forming die comprises a lower female die (2) and an upper female die (4), a forming die punch (1) is arranged below the upper female die (4), the two sides of the forming die punch (1) are arranged, a cross cutter (3) is arranged below the upper female die (4), a semi-cylindrical punch (1.1) is arranged at the upper part of the forming die punch (1), an arc groove is arranged at the bottom of the upper female die (4), a plurality of arc grooves (1.2) are formed in the outer diameter surface of the punch (1.1), and two side ends of the semi-circular outer diameter surface of the punch (1.1) are provided with outward and downward bulges (1.3).

2. The valve collet forming die of claim 1, wherein: the two side edges of the arc-shaped groove (1.2) of the punch (1.1) are provided with convex parts (1.3) which extend outwards and downwards.

3. A valve-lock-clip forming die according to claim 1 or 2, wherein: the radius of the punch (1.1) is R, the height of the protruding part (1.3) is 0.1R, and the horizontal distance extending outwards from the semicircular outer diameter surface of the punch (1.1) and the end part of the arc-shaped groove (1.2) is 0.03R.

4. A valve collet forming die according to claim 3, characterized in that: the vertical distance of the downward extension of the convex part (1.3) from the semicircular outer diameter surface of the punch (1.1) and the end part of the arc-shaped groove (1.2) is 0.03R.