CN201969741U

CN201969741U - Valve blank die

Info

Publication number: CN201969741U
Application number: CN2010206508749U
Authority: CN
Inventors: 江文广; 陈文�; 梁升; 张世文; 夏彩霞
Original assignee: Hunan Tianyan Machinery Co Ltd
Current assignee: Hunan Tianyan Machinery Co Ltd
Priority date: 2010-12-10
Filing date: 2010-12-10
Publication date: 2011-09-14
Anticipated expiration: 2020-12-10

Abstract

The utility model discloses a valve blank die, which comprises an upper die (1) and a lower die (2). The upper die (1) matches with the lower die (2), a valve blank cavity (21) is arranged in the lower die (2) and is divided into a valve blank rod cavity (211) and a valve blank head cavity (212), the upper die (1) is provided with a boss (11) which extends into the valve blank head cavity (212) of the lower die (2), the height H of the boss (11) ranges from 3 millimeters to 5 millimeters, and a circle of gap (213) which is used for forming an axial flashing of a valve blank is formed between the boss (11) of the upper die and the valve blank head cavity (212) of the lower die (2). Valve blanks manufactured by the valve blank die are processed conveniently and can lead valves to be firmer, operational reliability of the valves is improved, and the service lives of the valves are prolonged.

Description

The valve blank mould

Technical field

The utility model relates to a kind of mould, the valve blank mould that uses in particularly a kind of engine.

Background technology

At present, when making engine valve blank, tend to form radially overlap at the head of valve blank, its reason is because adopt by the valve blank Mold Making of structure as shown in Figure 1, this valve blank mould comprises patrix 1 and counterdie 2, patrix 1 matches with counterdie 2, be provided with valve blank chamber 21 in the counterdie 2, the top periphery that is positioned at blank chamber 21 in the counterdie 2 is provided with the overlap chamber 22 that a circle radially extends, patrix 1 is a straight line corresponding to the RADIAL of the face in the overlap chamber 22 of counterdie 2, and promptly patrix 1 does not have axial step on the surface in overlap chamber 22.Use the valve blank of this valve blank Mold Making to have the problem of the following aspects: 1, the radially overlap of the head of valve blank is unfavorable for coiling bar and proofreaies and correct together, and proofread and correct efficient, precision is low; Because the calibration equipment of valve blank normally when proofreading and correct engine valve stem by proofreading and correct the head cylindrical arriving the purpose of proofreading and correct the valve head, and radially the overlap valve blank because the existence meeting effect correction precision of head cylindrical overlap; 2, the radially overlap of the head of valve blank is unfavorable for the manual or automatic loading/unloading of following process operation, because during valve roughing, manually material loading generally is that hand is grabbed valve head cylindrical and carried out clamping again, and radially the overlap blank is owing to have overlap to hinder hand easily on the head cylindrical; It is short that 3, but the radially overlap of the head of valve blank makes valve blank neck centrum tensile elongation when forging and pressing; 4, since patrix 1 be " lid flat " on counterdie 2, during forging, can not the valve blank material in the blank chamber 21 of counterdie 2 be pushed, so can cause the valve blank that makes the not positive problem of head end pit to occur; Air valve cervix metal streamline compactness is poor simultaneously, causes valve insecure, poor reliability, and service life is short.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art and a kind of valve blank mould is provided, and is convenient to processing with the valve blank of its making, and can makes valve more firm, improves valve functional reliability and service life.

The technical solution of the utility model is: a kind of valve blank mould, it comprises upper die and lower die, patrix matches with counterdie, be provided with the valve blank chamber in the counterdie, the valve blank chamber is divided into valve blank bar chamber and valve blank head cavity, patrix is provided with the boss in the valve blank head cavity that stretches into counterdie, is provided with the gap that a circle is used to form the axial overlap of valve blank between the perisporium of the valve blank head cavity of the boss of patrix and counterdie.

The further technical scheme of the utility model is: the height of described boss is three to five millimeters.

The utility model compared with prior art has following characteristics:

1, the axial overlap of the valve blank that makes by the utility model helps coiling bar and proofreaies and correct together, calibration result ideal simultaneously, the precision height, for follow-up machining particularly transfer matic machining a good blank support can be provided;

2, the axial overlap of the valve blank that makes by the utility model solved the following process operation manually or automatic loading and unloading device to the requirement of blank because axially overlap is convenient to handgrip, can not hinder hand;

3, because can the valve blank material in the blank chamber of counterdie being pushed of the boss of patrix makes the valve blank head end that makes regular; Simultaneously can make air valve cervix metal streamline compactness good, improve reliability and service life, especially more obvious in work high-temperature region effect.

Below in conjunction with the drawings and specific embodiments detailed structure of the present utility model is further described.

Description of drawings

Fig. 1 is the structural representation of existing valve blank mould;

Fig. 2 is that Fig. 1 is along the enlarged diagram in the A line scope;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is that Fig. 3 is along the enlarged diagram in the B line scope.

The specific embodiment

Embodiment 1

As shown in Figure 3-4: a kind of valve blank mould, it comprises patrix 1 and counterdie 2, patrix 1 matches with counterdie 2, be provided with valve blank chamber 21 in the counterdie 2, valve blank chamber 21 is divided into valve blank bar chamber 211 and valve blank head cavity 212, patrix 1 is provided with the boss 11 in the valve blank head cavity 212 that stretches into counterdie 2, the height H of boss 11 is three to five millimeters, is provided with the gap 213 that a circle is used to form the axial overlap of valve blank between the perisporium of the boss 11 of patrix 1 and the valve blank head cavity 212 of counterdie 2.

The utility model is not limited to above-mentioned concrete structure, just drops within the protection domain of the present utility model so long as patrix 1 is provided with the valve blank mould that is provided with a ring gap 213 between the perisporium of valve blank head cavity 212 of the boss 11 of boss 11 in the valve blank head cavity 212 that stretches into counterdie 2, patrix 1 and counterdie 2.

Claims

1. valve blank mould, it comprises patrix (1) and counterdie (2), patrix (1) matches with counterdie (2), be provided with valve blank chamber (21) in the counterdie (2), valve blank chamber (21) is divided into valve blank bar chamber (211) and valve blank head cavity (212), it is characterized in that: patrix (1) is provided with the boss (11) in the valve blank head cavity (212) that stretches into counterdie (2), is provided with the gap (213) that a circle is used to form the axial overlap of valve blank between the perisporium of the boss (11) of patrix (1) and the valve blank head cavity (212) of counterdie (2).

2. valve blank mould according to claim 1 is characterized in that: the height of described boss (11) is three to five millimeters.