CN211304517U

CN211304517U - Accurate positioning fixture in hole of dysmorphism bending

Info

Publication number: CN211304517U
Application number: CN201921706098.7U
Authority: CN
Inventors: 戴延安; 宋智杰
Original assignee: Weichuangli Shanghai Metal Parts Co ltd
Current assignee: Weichuangli Shanghai Metal Parts Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-08-21
Anticipated expiration: 2029-10-12

Abstract

A special-shaped bending hole accurate bending clamp comprises a bending machine leaning bolt, a positioning stop block and a series screw capable of connecting the bending machine leaning bolt and the positioning stop block in a penetrating mode, wherein a limiting hole which is perpendicular to the upper plane of the positioning stop block and penetrates through the upper surface and the lower surface of the positioning stop block is formed in the positioning stop block, and a positioning pin and a positioning screw capable of achieving vertical displacement are arranged in the inner cavity of the limiting hole; the inner cavity of the limiting hole is a coaxial cylindrical cavity with a small aperture at the upper part and a large aperture at the lower part, and an internal thread meshed with the outer ring thread of the positioning screw is arranged on the cavity of the inner cavity at the lower part; the locating pin is in an inverted T shape, the upper pin rod of the locating pin can freely move in the small-aperture cavity at the upper part of the limiting hole, and the lower pillar part of the locating pin is matched with the small-aperture cavity at the lower part of the limiting hole to move.

Description

Accurate positioning fixture in hole of dysmorphism bending

Technical Field

The utility model relates to a positioning fixture, especially, accurate positioning fixture in hole of dysmorphism bending belong to the machine tooling technical field.

Background

The numerical control bending processing field, the shape of the product is formed by bending machine processing. At present, a common bending positioning device is generally used as shown in figures 5 and 6, the positioning working principle of a numerical control bending machine is shown in the figures, a product positioning reference is placed on a common positioning stop block 2 in figure 5, and when downward pressure is applied, a product can contact an upper die and a lower die to be stressed to form a shape required by a customer, so that the customer design requirement is met. However, when the customer design requirement is high and the product is a complex special-shaped part, the number of bending machines and the number of debugging personnel are increased when the common positioning stop block 2 is used for irregular bending, and because the number of products is small, the types are many, the shapes are complex, the customer requirements cannot be met, the products cannot be processed, and a mold needs to be opened, a large amount of funds are wasted, and the research and development cost is increased; the number of debugging personnel is increased, and the product quality defects are easily caused because the product number is small, the variety is large, the shape is complex, the technology for workers is high, the positioning is inaccurate; increase circulation process, extravagant a large amount of time influences production efficiency, hardly satisfies customer's requirement. Meanwhile, in the process of bending and debugging, products are different in size, shape and positioning, particularly, machined parts are complex and various in product models, and the products cannot be machined due to the fact that bending in irregular shapes is achieved in the debugging process and no appearance fine reference positioning exists, or a plurality of bending machines are needed for debugging and molding. The technical requirements on workers are high, the production efficiency is low, and the product quality cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

The technical problems mainly solved by the invention are as follows: the design is an accurate positioning fixture in dysmorphism hole of bending, realizes that the dysmorphism is bent and can be produced on the bender with the hole location, can effectual improvement bender utilization ratio, practices thrift and transfers the mould time, improves product quality, improves production efficiency.

This kind of accurate positioning fixture in dysmorphism hole of bending, lean on tying 1, location dog 2 and can lean on tying 1, location dog 2 both to link the screw 3 that concatenates together, its characterized in that with the bender including the bender: the positioning block 2 is provided with a limiting hole 6 which is perpendicular to the upper plane of the positioning block 2 and penetrates through the upper surface and the lower surface of the positioning block, and a positioning pin 4 and a positioning screw 5 which can realize up-and-down displacement are arranged in the inner cavity of the limiting hole 6.

Furthermore, the inner cavity of the limiting hole 6 is a coaxial cylindrical cavity with a small aperture at the upper part and a large aperture at the lower part, and an internal thread meshed with the external thread of the positioning screw 5 is arranged on the inner cavity of the lower part.

Furthermore, the positioning pin 4 is in an inverted T shape, the pin rod at the upper part can freely move in the small-aperture cavity at the upper part of the limiting hole 6, and the pillar part at the lower part can move in a matching way with the small-aperture cavity at the lower part of the limiting hole 6.

According to the special-shaped accurate positioning fixture for the bending hole, which is provided by the technical scheme, the problem that the special-shaped accurate positioning fixture is difficult to bend is solved quickly by the simple and conventional special-shaped accurate positioning structure for the bending hole, which is arranged on the hole positioning stop block, and the quick implementation of mass production is facilitated.

Simple, break through conventional design, solved the difficult problem puzzlement that the dysmorphism was bent accurate location fast to quick batch production ization is implemented.

Drawings

FIG. 1 is a schematic view of the overall structure of the special-shaped precise positioning fixture for bending holes of the present invention;

FIG. 2 is a schematic view of an exploded structure of the special-shaped bending hole precision positioning fixture of the present invention;

FIG. 3 is a schematic cross-sectional view of the improved hole alignment stop of FIGS. 1 and 2;

FIG. 4 is a schematic view of the usage state of the present invention;

FIG. 5 is a schematic view of the general structure of a bending positioning device;

fig. 6 is an exploded view of a conventional bending positioning device.

In the figure:

1-a bending machine leaning bolt 2-a hole positioning stop block 3-a tandem screw 4-a positioning pin 5-a positioning screw 6-a positioning hole 7-a tandem screw hole A-a hole accurate positioning clamp B-a workpiece C-a workpiece hole.

Detailed Description

The invention is further described below and embodiments of the invention are given in conjunction with the drawings of the specification.

The precise positioning fixture for the special-shaped bending hole shown in the attached drawings 1-3 is an innovative improvement on the common bending positioning device which is generally applicable at present and is shown in the attached

drawings

5 and 6.

The accurate positioning fixture for the special-shaped bending hole comprises a bending machine leaning bolt 1, a positioning stop block 2 and a series connection screw 3 which can connect the bending machine leaning bolt 1 and the positioning stop block 2 in a penetrating mode, wherein a limiting hole 6 which is perpendicular to the upper plane of the positioning stop block 2 and penetrates through the upper surface and the lower surface of the positioning stop block is formed in the positioning stop block 2, and a positioning pin 4 and a positioning screw 5 which can achieve vertical displacement are arranged in the inner cavity of the limiting hole 6.

The positioning pin 4 is in an inverted T shape and penetrates through the inner cavity of the limiting hole 6; the upper pin rod can freely move in the small-bore cavity at the upper part of the limit hole 6 until the end part extends out of the upper plane of the stop block 2. The lower part of the table column is matched with the lower aperture cavity of the limiting hole 6 for displacement.

The inner cavity of the limiting hole 6 is a coaxial cylindrical cavity with a small aperture at the upper part and a large aperture at the lower part, and an internal thread meshed with the external thread of the positioning screw 5 is arranged on the cavity of the inner cavity at the lower part. The height of a plane on the positioning pin 4 adjacent to the upper part of the positioning screw 5, extending out of the stop block 2, is controlled by screwing in the positioning screw 5 or retracting the positioning screw 5, so that the height of the extending end can be adapted to the requirements of different thicknesses of the bent workpiece.

By adopting the design scheme, the problem that holes in parts needing to be processed are used as positioning supporting points when the products have no regular shapes can be solved. Because of the improved clamp, the positioning pin 4 arranged in the limiting hole 6 of the positioning stop block 2 can be inserted into the existing hole of the processed workpiece.

Figure 4 provides the use the utility model provides an accurate positioning fixture in dysmorphism bending hole's state schematic diagram.

In the actual production process, when the hole accurate positioning fixture A is used for production, two workpiece holes C matched with the positioning pins 4 in the positioning holes in the fixture are needed to be adopted on a workpiece to be machined to realize bending machining of the workpiece. In fact, two fixtures are adopted, two original workpiece holes C on the product are made to be in a fixed positioning state with two positioning holes 6 respectively arranged on the two fixtures, and then the workpiece is bent according to the requirements of a specific bending procedure. When in use, the extension height of the positioning pin 4 in the positioning hole 6 can be controlled by rotating the positioning screw 5, so that the extension height is matched with the thickness of the workpiece B to be processed. After the machining is finished, the positioning pin 4 can be withdrawn from the positioning hole 6 only by reversely rotating the positioning screw 5.

Practical use shows that the special-shaped bending hole accurate positioning fixture has the following use effects:

1. the die change time is saved by more than 80%;

2. the process cost is about 50K per year, RMB.

3. The size defect of the product is reduced by 30 percent.

The above is only the basic embodiment of the present invention given by the applicant according to the technical solution, and any improvement without substantial idea proposed by the skilled person in this industry with reference to this basic solution should be considered as belonging to the protection scope of the present invention.

Claims

1. The utility model provides an accurate positioning fixture in dysmorphism hole of bending, leans on bolt (1), location dog (2) and can lean on bolt (1), both cross-under of location dog (2) with the bender to concatenate screw (3) together, its characterized in that: the positioning block (2) is provided with a limiting hole (6) which is perpendicular to the upper plane of the positioning block (2) and penetrates through the upper surface and the lower surface of the positioning block, and the inner cavity of the limiting hole (6) is provided with a positioning pin (4) and a positioning screw (5) which can realize vertical displacement.

2. The precision positioning clamp for the special-shaped bending hole as claimed in claim 1, is characterized in that: the inner cavity of the limiting hole (6) is a coaxial cylindrical cavity with a small aperture at the upper part and a large aperture at the lower part, and an internal thread meshed with the external thread of the positioning screw (5) is arranged on the inner cavity of the lower part.

3. The precision positioning clamp for the special-shaped bending hole as claimed in claim 1, is characterized in that: the positioning pin (4) is in an inverted T shape, the pin rod at the upper part can freely move in the small-aperture cavity at the upper part of the limiting hole (6), and the pillar part at the lower part can be matched with the small-aperture cavity at the lower part of the limiting hole (6) to move.