CN107639194B

CN107639194B - Valve body forging die

Info

Publication number: CN107639194B
Application number: CN201610571523.0A
Authority: CN
Inventors: 姜星智; 张晓松; 施建忠; 李军; 穆剑菲; 苏荣华
Original assignee: SUZHOU KUNLUN HEAVY EQUIPMENT MANUFACTURING Co Ltd
Current assignee: SUZHOU KUNLUN HEAVY EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2016-07-20
Filing date: 2016-07-20
Publication date: 2020-02-11
Anticipated expiration: 2036-07-20
Also published as: CN107639194A

Abstract

The invention discloses a valve body forging die which comprises a punch, lower die components and a positioning piece, wherein at least two lower die components are spliced to form a lower die, the opposite side walls of each lower die component are respectively provided with an inwards concave structure, the inwards concave structures of the lower die components are butted to form a cavity with the same shape as that of a valve body to be forged, the upper end of the cavity is provided with an opening, the positioning piece can keep each lower die in a stable splicing state, the punch of the component can be vertically lifted and positioned at the upper end of the lower die, and the punch can just stretch into the lower die cavity along the opening of the lower die cavity.

Description

Valve body forging die

Technical Field

The invention relates to a manufacturing device of a three-way structure valve body, in particular to a valve body forging die.

Background

The valve body forge piece is widely applied to the key fields of national economy such as petroleum, nuclear power and the like, the valve body bears high pressure in the working process, the traditional processing method of the valve body is a free forging processing method, the free forging belongs to a rough thermoforming mode, and the valve body forge piece is characterized in that the valve body is roughly contoured, the free forging forge piece is heavy and irregular in shape, a large amount of machine processing is needed subsequently, when the machine processing is carried out, raw materials are seriously wasted, an inner hole cannot be extruded, the production efficiency is low, a continuous forging flow line cannot be reserved in the product, and the mechanical property is poor, so the mechanical property of a discontinuous metal structure of the free forging piece cannot meet the increasingly-improved use requirement slowly, an open die forging processing method is adopted at present, however, because the open die forging blank manufacturing is needed, the process is complicated, large flash is generated during forging, the raw materials are wasted, and the, the inner hole cannot be formed by pressing.

Disclosure of Invention

In order to overcome the defects, the invention provides the valve body forging die which can realize the extrusion forming and the smooth demoulding of the valve body, the formed valve body has high mechanical performance, and raw materials are saved.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a valve body forges mould, includes the drift, lower mould subtotal setting element, two at least lower mould subtotal concatenations form the lower mould, form the indent structure on the relative lateral wall of each lower mould subtotal respectively, the indent structure butt joint of each lower mould subtotal forms and waits to forge the die cavity that the valve body appearance is unanimous, the die cavity upper end forms the opening, the setting element can keep each lower mould subtotal steady concatenation state, the drift vertically can go up and down be located the lower mould upper end, and the drift just can follow the die cavity opening of lower mould and stretch into in the lower mould die cavity.

As a further improvement of the invention, the two lower die components are butted along the longitudinal bisection plane of the valve body, and can respectively move towards the direction far away from the longitudinal bisection plane of the valve body.

As a further improvement of the invention, the positioning piece is an integral outer ring which is sleeved outside the circumference of the lower die, and the integral outer ring and the lower die can longitudinally and relatively slide and separate.

As a further improvement of the invention, a funnel-shaped structure with the lower end size smaller than that of the upper end is formed on the inner side of the integral outer ring, and a slope structure matched with the funnel-shaped structure on the inner side of the integral outer ring is formed on the outer side wall of the lower die.

As a further improvement of the invention, the upper end part of the inner side of the integral outer ring forms a vertical structure with a constant end size.

As a further improvement of the invention, the lower end of the punch forms an inner hole forming section with the diameter reduced inwards, and the inner hole forming section is just consistent with the diameter of a vertical hole in the valve body to be extruded.

The invention has the beneficial effects that: according to the invention, the split lower die is adopted, the lower die parts are fixedly connected by adopting the positioning piece to keep a stable splicing state, the valve body is extruded and molded by the punch, after the positioning piece is separated from the lower die parts after molding, the lower die parts are separated to realize demolding, the product is smoothly demolded, a vertical inner hole can be extruded while the forge piece is extruded and molded, no flash is generated, a relatively complete forging streamline can be reserved on the final part, the mechanical property of the part is improved, raw materials can be saved, and the production cost is reduced.

Drawings

FIG. 1 is a perspective view of a valve body;

FIG. 2 is a schematic cross-sectional view of the valve body structure;

FIG. 3 is a perspective view of a forging formed by free forging;

FIG. 4 is a front view of a forging formed by free forging;

FIG. 5 is a perspective view of a forging formed by open die forging;

FIG. 6 is a front view of a forging formed by open die forging;

FIG. 7 is a diagram of a pre-extrusion state using the present invention;

FIG. 8 is a state diagram after extrusion molding using the present invention;

FIG. 9 is a state diagram illustrating the demolding of the present invention;

FIG. 10 is a perspective view of an extruded product incorporating the present invention;

FIG. 11 is a schematic cross-sectional view of a product formed by extrusion according to the present invention.

Detailed Description

Example (b): the utility model provides a valve body forges mould, including drift 1, lower mould part 2 and setting element, 2 concatenations of at least two lower mould parts form the lower mould, form indent structure 4 on the 2 relative lateral walls of each lower mould part respectively, the indent structure 4 butt joint of each lower mould part 2 forms and waits to forge 6 appearance unanimous die cavity 5 of valve body, 5 upper ends of die cavity form the opening, the setting element can keep each lower mould part to keep stable concatenation state, 1 vertical location in lower mould upper end that can go up and down of drift, and drift 1 just can be followed in 5 openings of lower mould cavity stretch into lower mould cavity 5.

When the valve body is extruded, the lower die pieces 2 are spliced together firstly, a cavity 5 is formed inside the lower die pieces, then the lower die pieces 2 are fixedly positioned through a positioning piece, the lower die pieces 2 are kept in a stable splicing state, blanks are loaded into the cavity 5 from an opening of the cavity 5, then the blanks are extruded by the punch 1 longitudinally and downwards, the blanks are gradually pressed into the lower die cavity 5 and are formed in the cavity 5, the punch 1 is withdrawn after the forming, the positioning piece is separated from the lower die pieces 2, the lower die pieces 2 are separated, and the extruded products can be taken out.

The lower mould daughter spare 2 is two, two lower mould daughter spares 2 dock along the vertical bisection face of valve body, two lower mould daughter spares 2 can move towards the direction of keeping away from the vertical bisection face of valve body respectively, after the forging shaping, the setting element breaks away from the back with the lower mould, two lower mould daughter spares 2 backward motion on the horizontal direction, then take out the forging along the direction of perpendicular to parting face, this kind of simple structure, forging shaping precision is high, the drawing of patterns of being convenient for, in addition can be along other face parting forming lower mould daughter spares 2, and divide into more lower mould daughter spares 2, if three, four, five, six etc., as long as the forging of being convenient for takes out can.

The setting element is a whole outer lane 3, the lower mould circumference outside is located to 3 covers in whole outer lane, whole outer lane 3 and lower mould vertically can the relative slip break away from, cup joint lower mould son 2 through whole outer lane 3, make each inseparable concatenation of lower mould son 2 together, the back is accomplished in the shaping, ejecting whole outer lane 3 simultaneously together along with the work piece to halved lower mould son 2, then take out the forging along the direction of perpendicular to parting die face, except adopting 3 tight modes of cover in whole outer lane can also be through setting up on lower mould son 2 and can adopt the bolt, the ear of connecting such as connecting piece, connect through connecting pieces such as bolt or bolt, it can to take off the connecting piece during the drawing of patterns, this sees the equivalence alternative structure that this patent thinks very easily for technical staff in the field.

3 inboard formation lower extreme sizes of whole outer lane are less than the funnel-shaped structure of upper end size, and the lower mould lateral wall forms the inclined plane structure that matches with the inboard funnel-shaped structure of whole outer lane, is convenient for the shaping through adopting the funnel-shaped structure that the upper end opening is greater than the lower extreme open-ended to accomplish the back, and the lower mould rises and 3 separation of whole outer lane, and when carrying out extrusion simultaneously, drift 1 can not release whole outer lane 3 outsides with the lower mould from last downward hard, guarantees closely the concatenation.

The upper end of the inner side of the whole outer ring 3 forms a vertical structure with an unchanged end size, the lower die can be inserted into the position with the height of the whole outer ring 3 at the section, the lower die is prevented from entering the inside of the whole outer ring 3 too deeply in the extrusion process of the punch 1, and the lower die is difficult to separate after the forming is completed.

The lower end of the punch 1 forms an inner hole forming section with the diameter shrinking inwards, the inner hole forming section is just consistent with the diameter of a vertical hole in a valve body to be extruded, and the inner hole forming section is arranged at the lower end of the punch 1, so that the vertical inner hole can be extruded simultaneously in the extrusion forming process of a forge piece.

Claims

1. The utility model provides a valve body forges mould which characterized in that: the device comprises a punch (1), lower die parts (2) and a positioning part, wherein at least two lower die parts are spliced to form a lower die, the opposite side walls of each lower die part are respectively provided with an inwards concave structure (4), the inwards concave structures of the lower die parts are butted to form a cavity (5) with the shape consistent with that of a valve body (6) to be forged, the upper end of the cavity is provided with an opening, the positioning part can keep the stably spliced state of the lower die parts, the punch can be vertically lifted and positioned at the upper end of the lower die and can just stretch into the lower cavity along the opening of the lower die cavity, the positioning part is an integral outer ring (3) which is sleeved outside the circumference of the lower die, the integral outer ring and the lower die can be longitudinally separated in a relative sliding way, the inner side of the integral outer ring forms a funnel-shaped structure with the lower end size smaller than the upper, the inboard upper end of whole outer lane forms the unchangeable vertical structure of a section size, vertical structure and funnel-shaped structure lug connection, this section can realize that the lower mould inserts the spacing of whole outer lane high position, avoids the lower mould to get into inside too deeply in whole outer lane at drift extrusion in-process, is difficult to break away from after the shaping is accomplished.

2. The valve body forging die of claim 1, wherein: the lower die parts are two, the two lower die parts are butted along the longitudinal split surface of the valve body, and the two lower die parts can move towards the direction far away from the longitudinal split surface of the valve body respectively.

3. The valve body forging die of claim 1, wherein: the lower end of the punch forms an inner hole forming section with the diameter shrinking inwards, and the inner hole forming section is just consistent with the diameter of a vertical hole in the valve body to be extruded.