CN216461300U

CN216461300U - Forming die for bending and closing of barrel blank

Info

Publication number: CN216461300U
Application number: CN202122444878.2U
Authority: CN
Inventors: 许家地
Original assignee: Quanzhou Taizhi Machinery Development Co ltd
Current assignee: Quanzhou Taizhi Machinery Development Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-05-10
Anticipated expiration: 2031-10-11

Abstract

The utility model discloses a forming die for bending and closing up a barrel blank, which comprises an upper die and a lower die which are arranged on a hydraulic press and are oppositely arranged and matched with each other, wherein the upper die comprises an upper die holder and a closing-up female die assembled at the midpoint of the upper die holder, the lower surface of the closing-up female die is sunken from bottom to top, the inner contour of the closing-up female die is an arc surface, the lower die comprises a lower die holder and a closing-up male die assembled at the midpoint of the lower die holder, and the upper surface of the closing-up male die is an upward-raised arc surface. According to the utility model, through the interaction of the closing-in female die and the closing-in male die, the single-end bending closing-in can be effectively carried out on the cylindrical blank workpiece in a circular tube shape, and the size precision of a finished product is effectively improved.

Description

Forming die for bending and closing of barrel blank

Technical Field

The utility model relates to the field of hydraulic press dies, in particular to a forming die for bending and closing a tube blank.

Background

The existing forming die for bending and closing up the tube blank is generally immature, the processing procedure links are multiple, the size of the die manufactured through different sequences can have deviation, different phenomena such as displacement are generated, different requirements on the size of the die cannot be guaranteed when the size precision is influenced, and therefore the requirements on different sizes cannot be met, and production is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a forming die for bending and closing a tube blank, which solves the problems in the background technology.

The technical scheme of the utility model is as follows: a forming die for bending and closing a cylinder blank comprises an upper die and a lower die which are arranged on a hydraulic machine and are oppositely arranged and matched with each other, the upper die comprises an upper die base and a necking female die assembled in the midpoint of the upper die base, the lower surface of the necking female die is concave from bottom to top, the inner contour of the necking female die is an arc surface, the lower die comprises a lower die base and a closing-in convex die assembled at the midpoint of the lower die base, the upper surface of the closing-in convex die is an upward convex cambered surface, the inward concave initial position of the lower end of the closing-in female die is a positioning guide inner conical surface, the corner surface of the inner end of the overlapping part of the closing-in female die and the closing-in male die is a closing-in inner arc surface, the necking inner arc surface is tangent to the positioning guide inner cone surface, the position of the upper end of the necking convex die, which protrudes outwards, is a guide arc surface, and a positioning groove is formed in the necking convex die along the outer ring of the guide arc surface.

Preferably, guide posts and guide sleeves matched with the guide posts are symmetrically distributed between the upper die holder and the lower die holder.

Preferably, the radian of the arc surface of the closing-up female die is the same as that of the arc surface of the closing-up male die.

Preferably, the single side of the angle of the positioning guide inner cambered surface is 2-45 degrees, and the radius dimension R of the closing-in inner cambered surface is 50-220 mm.

Preferably, the width of the positioning groove is 10mm-30mm, and the depth is 2mm-8 mm.

As can be seen from the above description, the present invention has the following advantages compared with the prior art:

according to the forming die, the closing-up female die and the closing-up male die interact with each other to effectively press and form a barrel part, meanwhile, the matching of the assembly parts of the upper die and the lower die is ensured, so that the axial force and the radial bias force generated when the upper die and the lower die interact with each other are conducted, the die is prevented from deviating from the central position, and the size precision of a finished product is improved;

drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic structural view of a closing-in female die and a closing-in male die of the utility model;

FIG. 3 is a schematic structural view of the necking die of the present invention;

FIG. 4 is a schematic perspective view of the necking die of the present invention;

FIG. 5 is a schematic structural diagram of a closing-up punch of the utility model;

FIG. 6 is a schematic perspective view of the closing-in punch of the present invention;

the meaning of the reference symbols in the figures: the device comprises a closing-in female die 1, a positioning guide inner conical surface 101, a closing-in inner arc surface 102, an upper mounting plane 103, an upper mounting step 104, an upper mounting hole 105, a closing-in male die 2, a guiding arc surface 201, a positioning groove 202, a lower mounting plane 203, a lower mounting step 204 and a lower mounting hole 205.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a forming die for bending and necking a barrel blank comprises an upper die and a lower die which are arranged on a hydraulic press and are oppositely arranged and matched with each other, wherein the upper die comprises an upper die holder and a necking female die 1 assembled at the center of the upper die holder, guide pillars and guide sleeves matched with the guide pillars are symmetrically arranged between the upper die holder and the lower die holder, the lower surface of the necking female die 1 is recessed from bottom to top, the inner contour of the necking female die is a cambered surface, the lower die comprises a lower die holder and a necking male die 2 assembled at the center of the lower die holder, the upper surface of the necking male die 2 is a cambered surface which is raised upwards, the radian of the cambered surface of the necking female die 1 is the same as that of the necking male die 2, the inward-recessed starting position of the lower end of the necking female die 1 is a positioning guide inner conical surface 101, and the corner surface of the inner end of the portion of the necking female die 1, which is overlapped with the necking female die 2, is a necking female die 102, the necking-in inner arc surface 102 is tangent to the positioning guiding inner cone surface 101, the angle single side of the positioning guiding inner cone surface 101 is 2-45 degrees, the radius dimension R of the necking-in inner arc surface 102 is 50-220 mm, the upper surface of the necking-in female die 1 is an upper mounting plane 103 used for limiting the axial position of the necking-in female die 1, the upper mounting plane is matched and contacted with a corresponding upper die assembly part to conduct the axial force generated when the upper die and the lower die interact, a plurality of upper mounting holes 105 are distributed along the circumferential direction of the outer ring of the necking-in female die 1, the upper mounting holes 105 completely avoid the inner sunken part and are used for fastening the necking-in female die 1 on the upper die to prevent the loosening, an upper mounting and positioning step 104 is arranged between the upper mounting plane 103 and the upper mounting holes 105 and used for limiting the radial position of the necking-in female die 1 and matched with a positioning sinking platform of the corresponding upper die assembly part to bear the radial bias force possibly generated when the upper die and the lower die act, the anti-loosening die comprises a die, a guiding arc surface 201 is arranged at the position where the upper end of a closing-up male die 2 protrudes outwards, a positioning groove 202 is formed in the closing-up male die 2 along the outer ring of the guiding arc surface 201, the width of the positioning groove 202 is 10mm-30mm, the depth of the positioning groove 202 is 2mm-8mm, the lower surface of the closing-up male die 2 is a lower mounting plane 203 and used for limiting the axial position of the closing-up male die 2, the lower mounting plane is matched and contacted with a corresponding upper die assembly part to conduct axial force generated when the upper die and the lower die interact, a plurality of lower mounting holes 205 are circumferentially distributed along the outer ring of the closing-up male die 2, the lower mounting holes 205 completely avoid the guiding arc surface 201 and the positioning groove 202 and are used for fastening the closing-up male die 2 on a lower die and preventing the loosening of the closing-up male die, and a mounting positioning lower step 204 is arranged between the lower mounting plane 203 and the lower mounting holes 205 and used for limiting the radial position of the closing-up male die 2, and the positioning sinking platform is matched with the corresponding lower die assembly part to bear radial bias force which is possibly generated when the upper die and the lower die act, so that the die is prevented from deviating from the central position.

The necking-in female die 1 is used for bending and necking the upper end of a barrel part; the positioning guiding inner conical surface 101 is used for guiding and pre-closing the upper end of the cylinder before forming, so that the upper end of the cylinder is always positioned at a correct forming position; the closing-in inner arc surface 102 is close to and tangent to the positioning guide inner cone surface 101 and is used for closing in the upper end of the barrel part to a large extent, so that the barrel part is changed into a bowl-shaped part, and the wall thickness of different parts of the bowl-shaped part from the small end to the large end is increased in different degrees; the closing-up male die 2 is used for interacting with the closing-up female die 1 to press and form the barrel part, the closing-up male die 2 can limit the radial and axial positions of the lower end of the barrel part before pressing and when pressing, the guide cambered surface 201 is used for guiding and positioning the barrel part when entering a station, so that the barrel part can correctly enter the station through guide, the positioning groove 202 is used for placing the lower end of the barrel part, the limiting effect from beginning to end is carried out on the axial and radial directions of the barrel part, the lower end of the barrel part is stabilized, deformation and instability are prevented, small transition circular arcs are machined on the joint surfaces at the two ends of the positioning groove 202, and cracking caused by stress concentration is prevented.

According to the utility model, through the interaction of the closing-in female die 1 and the closing-in male die 2, the single-end bending closing-in of the cylindrical blank workpiece can be effectively carried out, so that the cylindrical workpiece is changed into a bowl-shaped workpiece with two ends opened in a large and a small manner, and the wall thickness of different parts of the bowl-shaped workpiece from the small end to the large end is increased in different degrees. Using a closing-up female die 1 and a closing-up male die 2 with corresponding sizes, wherein the inner diameter size range of the tube blank capable of closing up is phi 200-700mm, the height size range is 50-500mm, and the wall thickness size range is 8-24 mm; the bowl-shaped piece is formed after the closing-in, the size of the middle hole in the small end of the bowl-shaped piece can be 50-200mm smaller than that of the large end, and the increase of the wall thickness of different parts of the bowl-shaped piece is 0-5 mm.

The working principle of the utility model is as follows:

during operation, the cylinder is correctly placed on the closing-up convex die 2, and the lower end of the cylinder is guided by the guide arc surface 201 and then falls onto the positioning groove 202, so that positioning is carried out; then the closing-in female die 1 and the upper die move downwards along with a sliding block of the hydraulic press, the positioning guiding inner conical surface 101 firstly contacts the upper end of the cylinder and guides and pre-closes the upper end of the cylinder; then, the hydraulic press slide block continues to move downwards, the closing-up male die 2 continues to apply pressure to the barrel, so that the upper end of the barrel further moves towards the closing-up inner arc surface 102 and is pressed and closed up towards the central direction along the shape of the arc surface until a bowl-shaped part with the required size is finally formed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a forming die that is used for section of thick bamboo base to bend binding off, is including installing relative setting and the mould and the lower mould of mutually supporting on the hydraulic press, its characterized in that: the upper die comprises an upper die base and a necking female die (1) assembled in the center of the upper die base, the lower surface of the necking female die (1) is sunken from bottom to top, the inner contour of the necking female die is an arc surface, the lower die comprises a lower die base and a necking male die (2) assembled in the center of the lower die base, the upper surface of the closing-in convex die (2) is an upward convex cambered surface, the initial position of the lower end of the closing-in concave die (1) is a positioning guide inner conical surface (101), a closing-in inner arc surface (102) is arranged on the corner surface of the inner end of the overlapping part of the closing-in female die (1) and the closing-in male die (2), the closing-in inner arc surface (102) is tangent to the positioning guide inner cone surface (101), the convex position of the upper end of the closing-in convex die (2) is a guide cambered surface (201), and a positioning groove (202) is formed in the closing-up convex die (2) along the outer ring of the guide arc surface (201).

2. The forming die for the press bending closing-in of the cylinder blank as claimed in claim 1, wherein: guide posts and guide sleeves matched with the guide posts are symmetrically distributed between the upper die base and the lower die base.

3. The forming die for the press bending closing-in of the cylinder blank as claimed in claim 1, wherein: the radian of the cambered surface of the closing-in female die (1) is the same as that of the cambered surface of the closing-in male die (2).

4. The forming die for the press bending closing-in of the cylinder blank as claimed in claim 1, wherein: the angle single side of the positioning guide inner conical surface (101) is 2-45 degrees, and the radius dimension R of the closing-in inner curved surface (102) is 50-220 mm.

5. The forming die for the press bending closing-in of the cylinder blank as claimed in claim 1, wherein: the width of the positioning groove (202) is 10mm-30mm, and the depth is 2mm-8 mm.