CN216027700U - Mould centering hole flanging mechanism - Google Patents

Abstract

The utility model relates to the field of dies, and particularly discloses a die centering hole flanging mechanism which comprises a positioning part arranged on a lower die base and used for positioning a workpiece, wherein hole flanging mechanisms are symmetrically arranged on two sides of the positioning part, each hole flanging mechanism comprises a wedge slide block and a hole flanging column which is arranged on the wedge slide block and acts on corresponding side hole positions of the workpiece, each hole flanging column comprises a first hole flanging column and a second hole flanging column which are respectively arranged on the opposite wedge slide blocks, the outer diameters of the first hole flanging column and the second hole flanging column are the same and coaxial, a preset mandrel extends from the end part of the first hole flanging column, a preset core hole matched with the preset mandrel is arranged at the end part of the second hole flanging column, and the length of the preset mandrel is greater than the spacing distance between two side walls of the workpiece provided with punching parts. When hole flanging operation is carried out on punching hole positions on two side walls of a workpiece, pre-centering of coaxiality is carried out on two hole flanging columns firstly, so that the coaxiality of hole flanging after hole flanging operation is improved.

Description

Mould centering hole flanging mechanism

Technical Field

The utility model relates to the field of molds, in particular to a centering hole flanging mechanism of a mold.

Background

The control arms serve as guiding and force-transmitting elements of the suspension system of the vehicle, and the control arms elastically connect the wheel and the vehicle body via a ball joint or a bushing, respectively. The production process of the control arm comprises the following steps: blanking → stretching → trimming and punching → flanging molding → punching and side punching → pressing chamfer → hole flanging. Therefore, the overall shape of the control arm mainly comprises the stress beam and the side walls on two sides of the stress beam, and the holes are formed in both the side walls at one end of the control arm. The hole flanging is mainly performed on holes in the punching step, the position of the hole flanging part is mainly used for installing a spherical hinge or a lining, and the coaxiality requirement of the hole flanging on the two side walls is very high.

When hole flanging is performed, hole flanging needs to be performed on the punching hole positions on the two side walls at the same time, so that the coaxiality requirements of the two hole flanging columns when hole flanging is performed on the opposite punching hole positions need to be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hole flanging device which can ensure the coaxiality precision of two hole flanging columns and further improve the coaxiality precision of hole positions after hole flanging.

In order to achieve the above object, the present invention is solved by the following technical solutions: the utility model provides a mould is to hole flanging mechanism to heart, is including setting up in the location portion that the die holder just is used for fixing a position the work piece on, is provided with hole flanging mechanism at the bilateral symmetry of location portion, and hole flanging mechanism includes the slide block and sets up the hole flanging post that just acts on the corresponding side hole site of work piece on the slide block of slide block, the hole flanging post is including setting up first hole flanging post and the second hole flanging post on the slide block of slide block in opposite directions respectively, and first hole flanging post is the same and coaxial with the external diameter of second hole flanging post, has predetermined mandrel in the tip extension of first hole flanging post, is provided with the predetermined centre bore with predetermined mandrel complex at the tip of second hole flanging post, and the length of predetermined mandrel is greater than the spacing distance between the two lateral walls that the work piece was provided with the position of punching a hole.

Through the scheme, when hole flanging is carried out on die assembly counterpunch hole sites, the two wedge slide blocks are firstly drawn close to each other, the preset mandrel is firstly inserted into the preset core hole in the drawing close process, then hole flanging is simultaneously carried out on the punching positions on the two side walls of the workpiece through the first hole flanging column and the second hole flanging column, the coaxiality in the hole flanging process is ensured through the matching of the preset mandrel and the preset core hole, and then the coaxiality of the two hole flanging after the hole flanging action is improved.

Preferably, the predetermined mandrel has a length greater than the separation distance between the two side walls of the workpiece where the punching sites are located.

Through the scheme, the coaxial centering of the two hole flanging columns is realized before the hole flanging of the hole flanging positions by the two hole flanging columns, and the coaxiality of the hole flanging is further improved.

Preferably, the wedge sliding block is matched with a wedge driving block, a first elastic piece is arranged between the wedge driving block and the lower die holder, the first elastic piece drives the wedge driving block to float above the lower die holder, and when the wedge driving block is acted by an upper die pressing block in a die closing state, the wedge sliding block is driven to slide towards a workpiece.

Preferably, the wedge driving block is linked with the wedge sliding block, an inclined dovetail groove is formed in the inclined surface of the wedge sliding block, opposite to the wedge driving block, and an inclined dovetail block embedded in the inclined dovetail groove is formed in the inclined surface of the wedge driving block, opposite to the wedge sliding block.

Through above-mentioned scheme, make slide wedge drive block and slide wedge slider be in the laminating state all the time through oblique dovetail and oblique forked tail piece, when the compound die, go up the mould and press the material piece to use when the slide wedge drive block, the slide wedge drive block can not bump with the slide wedge slider, and then has increased the life-span of whole mechanism.

Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that: when hole flanging operation is carried out on punching hole positions on two side walls of a workpiece, pre-centering of coaxiality is carried out on two hole flanging columns firstly, so that the coaxiality of hole flanging after hole flanging operation is improved.

Drawings

FIG. 1 is a schematic view of a workpiece axis in the present embodiment;

FIG. 2 is a view showing the mold opening state in the present embodiment;

FIG. 3 is a schematic view of the upper die holder axis in the present embodiment;

FIG. 4 is a schematic axial view of the lower die holder in this embodiment;

fig. 5 is a mold clamping state diagram in the present embodiment;

FIG. 6 is a diagram illustrating a state where the lower die holder is not pressed by the upper die and a workpiece is placed in the lower die holder in this embodiment;

FIG. 7 is a state diagram of the hole flanging mechanism in the present embodiment in a state of being pressed by the upper mold;

fig. 8 is an exploded schematic view of the hole flanging mechanism in the present embodiment;

fig. 9 is a state diagram of the hole flanging mechanism in the present embodiment in the clamped state.

In the figure: 1. a workpiece; 11. hole flanging; 2. an upper die holder; 21. an upper die pressing block; 3. a lower die holder; 31. a positioning part; 4. a wedge drive block; 41. an oblique dovetail block; 42. a first elastic member; 5. a slide wedge block; 51. an inclined dovetail groove; 52. a second elastic member; 6. a first hole flanging column; 61. a predetermined mandrel; 7. a second hole flanging column; 71. a predetermined core hole; 8. a base block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

A mould centering hole flanging mechanism is shown in figure 1, and is a workpiece 1 after hole flanging, wherein the workpiece 1 is a control arm component on an automobile part, holes 11 are required to be flanged on two sides of a side wall, and then bushings are pressed in the holes 11. This puts high demands on the coaxiality of the flanged hole 11.

Referring to fig. 2-9, the die is used for flanging the side wall of the workpiece 1, the lower die holder 3 is provided with a positioning portion 31 for positioning the workpiece 1, and flanging mechanisms are symmetrically arranged on two sides of the positioning portion 31 for flanging the workpiece 1. The hole flanging mechanism comprises a wedge slide block 5 and a wedge drive block 4, and a hole flanging column is arranged on one side, facing the workpiece 1, of the wedge slide block 5. And the hole flanging column comprises a first hole flanging column 6 and a second hole flanging column 7 which are respectively arranged on the two wedge sliders 5, a preset mandrel 61 is arranged at the end part of the first hole flanging column 6 opposite to the second hole flanging column 7, and a preset mandrel hole 71 matched with the preset mandrel 61 is arranged at the end part of the second hole flanging column 7. And the length of the predetermined mandrel 61 is greater than the distance between the two side walls of the workpiece 1 provided with the punching holes.

Wherein be provided with the first elastic component 42 of ordering about slide wedge drive block 4 come-up between slide wedge drive block 4 and die holder 3, be provided with the second elastic component 52 that orders about slide wedge 5 and roll back between slide wedge 5 and the base piece 8 to be provided with oblique dovetail 51 on the inclined plane of slide wedge 5, the inclined plane of slide wedge drive block 4 be provided with oblique dovetail 51 complex oblique forked tail block 41, thereby realize that slide wedge drive and slide wedge 5 laminate all the time. When the die is closed, the upper die pressing block 21 of the upper die base 2 acts on the wedge driving block 4, then the wedge sliding block 5 slides towards the workpiece 1, and due to the matching of the oblique dovetail groove 51 and the oblique dovetail block 41, the wedge driving block 4 and the wedge sliding block 5 are always attached, so that mutual impact is avoided, and the service life is prolonged. With the two wedge sliders 5 approaching to each other, the preset mandrel 61 is inserted into the preset mandrel hole 71, punching holes on two side walls of the workpiece 1 are simultaneously punched through the first hole flanging column 6 and the second hole flanging column 7, coaxiality in the hole flanging process is guaranteed through matching of the preset mandrel 61 and the preset mandrel hole 71, and coaxiality of the two hole flanging 11 after hole flanging is improved.

Claims (4)

1. The die centering hole flanging mechanism comprises a positioning portion (31) which is arranged on a lower die base (3) and used for positioning a workpiece (1), wherein hole flanging mechanisms are symmetrically arranged on two sides of the positioning portion (31), each hole flanging mechanism comprises a wedge slider (5) and a hole flanging column which is arranged on the wedge slider (5) and acts on corresponding side hole positions of the workpiece (1), and the hole flanging mechanisms are characterized in that the hole flanging columns comprise a first hole flanging column (6) and a second hole flanging column (7) which are respectively arranged on the opposite wedge sliders (5), the outer diameters of the first hole flanging column (6) and the second hole flanging column (7) are the same and coaxial, a preset mandrel (61) extends from the end portion of the first hole flanging column (6), and a preset core hole (71) matched with the preset mandrel (61) is arranged at the end portion of the second hole flanging column (7).

2. A die-centered hole flanging mechanism according to claim 1, characterized in that the length of the predetermined mandrel (61) is greater than the spacing distance between the two side walls of the workpiece (1) where the punching sites are provided.

3. The mold centering hole flanging mechanism is characterized in that a wedge driving block (4) is matched with a wedge sliding block (5), a first elastic piece (42) is arranged between the wedge driving block (4) and a lower die holder (3), the wedge driving block (4) is driven to float above the lower die holder (3) by the first elastic piece (42), and when the wedge driving block (4) is acted by an upper die pressing block (21) in a mold closing state, the wedge sliding block (5) is driven to slide towards a workpiece (1).

4. The mold centering hole flanging mechanism is characterized in that a wedge driving block (4) is linked with a wedge sliding block (5), a bevel dovetail groove (51) is formed in the bevel of the wedge sliding block (5) relative to the wedge driving block (4), and a bevel dovetail block (41) embedded in the bevel dovetail groove (51) is arranged on the bevel of the wedge driving block (4) relative to the wedge sliding block (5).

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