Tool for laser cutting

Abstract

The utility model relates to a tool for laser cutting, which comprises a positioning tool and a cutting tool, the positioning tool is used for forming a positioning hole on a to-be-cut part before cutting, and the cutting tool is used for supporting the to-be-cut part when the to-be-cut part is cut by a laser machine; the positioning tool comprises a male die, a female die and a drill bushing, and a part to be cut is arranged between the male die and the female die. The cutting tool comprises a base, a first positioning table, at least one first supporting block, two symmetrically-arranged second supporting blocks and a second positioning table. The first positioning table, the at least one first supporting block, the two symmetrically-arranged second supporting blocks and the second positioning table are used for supporting a part to be cut. The tool for laser cutting is high in repeated positioning precision and high in part assembling and disassembling speed, avoids poor repeated positioning consistency caused by the fact that formed parts do not have characteristic shapes, reduces production cost to a certain degree, and improves product quality at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to a fixture for laser cutting. Background Technique

[0002] With the rapid development of the aerospace industry, the requirements for curved parts and hole positions on parts have been further improved. When cutting the outer shape and holes of multi-curved parts, the five-axis laser cutting technology has been more and more widely used in the aerospace field with small cutting errors and high cutting precision. The five-axis laser cutting technology can not only be widely used in the cutting of metal flat materials, but also in the cutting of materials such as complex curves, special-shaped plates, and pipes.

[0003] First of all, when using five-axis laser cutting, it is necessary to position the parts through corresponding fixtures. However, in the process of sheet metal forming, the forming die can usually only press out the outer shape of the parts and cannot make features such as holes and irregular shapes for rapid positioning in the forming process. At the same time, this also makes it impossible to fully guarantee the dimensions and positional tolerances of the parts during the laser cutting process.

[0004] Secondly, when performing five-axis laser cutting, positioning points are required as references. The selection of the positioning points is based on the characteristic points of the part surface. When the part and the cutting fixture cannot be accurately fixed at the same position as the previous part, it is necessary to reselect the positioning points according to the differences between the two fixed parts. This not only increases the workload of subsequent adjustment, but also affects the consistency of the part processing state and the processing accuracy. Content of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the positioning of the formed parts is poor during laser cutting in the prior art, resulting in the inability to guarantee the precision during the part processing process.

[0006] To solve the above technical problems, the present utility model provides a fixture for laser cutting, comprising: a positioning fixture and a cutting fixture. The positioning fixture is used to drill positioning holes on the part to be cut before cutting, and the cutting fixture is used to support the part to be cut when the laser machine cuts the part to be cut. The positioning fixture includes a punch, a die and a drill bushing. A part to be cut is arranged between the punch and the die, and the punch and the die are buckled together to position the part to be cut. The die is provided with a drill bushing, and the drill bushing is used to position the position of the positioning hole of the part to be cut. The cutting fixture includes a base, a first positioning table, at least one first support block, two symmetrically arranged second support blocks and a second positioning table. The first positioning table, at least one first support block, two symmetrically arranged second support blocks and the second positioning table are all fixedly arranged on the base. The first positioning table, at least one first support block and the second positioning table are arranged on the same straight line, and the first support block is located between the first positioning table and the second positioning table. The two symmetrically arranged second support blocks are respectively located on both sides of the straight line where the first support block is located. The first positioning table, at least one first support block, two symmetrically arranged second support blocks and the second positioning table are used to support the part to be cut. The fixture for laser cutting of the present utility model has high repeated positioning accuracy, fast speed of loading and unloading parts, avoids poor repeated positioning consistency caused by the lack of characteristic shape of the formed parts, reduces the production cost to a certain extent, and improves the product quality at the same time.

[0007] In an embodiment of the present utility model, a first positioning hole is provided on the punch, a second positioning hole is provided on the die, the first positioning hole and the second positioning hole are arranged opposite to each other, and a first positioning pin is arranged between the first positioning hole and the second positioning hole. The first positioning pin is used for positioning between the punch and the die.

[0008] In an embodiment of the present utility model, a first through hole is provided on the punch, a second through hole is provided on the die, the first through hole and the second through hole are communicated, and the drill bushing is arranged at one end of the second through hole far from the punch.

[0009] In an embodiment of the present utility model, the punch is of a rectangular body structure, and a first U-shaped groove is provided at the middle position in the length direction of the punch. Arc-shaped convex parts are provided at both ends in the length direction of the punch. The arc-shaped convex parts and the first U-shaped groove are both arranged on the end surface of the punch opposite to the die.

[0010] In an embodiment of the present utility model, a second U-shaped groove and an arc-shaped groove are provided on the end surface of the die opposite to the punch. The second U-shaped groove and the first U-shaped groove are arranged opposite to each other, and the arc-shaped groove and the arc-shaped convex part are arranged opposite to each other.

[0011] In one embodiment of the present utility model, positioning pins two are provided at the upper ends of the first positioning table and the second positioning table. The upper ends of the positioning pins two extend out of the first positioning table and the second positioning table. The positioning pins two are used to insert into the positioning holes of the parts to be cut and positioned by the drill bush.

[0012] In one embodiment of the present utility model, the second support block is in the shape of a rectangular flat plate, and bosses are provided at both ends in the length direction of the second support block. Bolts are provided on the bosses, and the bosses are locked on the base through the bolts.

[0013] In one embodiment of the present utility model, a number of hollow through holes three are provided on the base. The number of the first support blocks is five. The through holes three are located between the first positioning table and the first support block, between adjacent first support blocks, and between the first support block and the second positioning table.

[0014] In one embodiment of the present utility model, positioning pins three are connected to the first positioning table, the first support block, and the second positioning table. Positioning pin holes three are provided on the base, and the positioning pins three are arranged in the positioning pin holes three.

[0015] In one embodiment of the present utility model, a number of mounting holes are provided on the base. Fasteners are provided in the mounting holes, and the base is fixedly connected to the machine tool through the fasteners.

[0016] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0017] The fixture for laser cutting of the present utility model avoids the problem that in the five-axis laser cutting process, it is necessary to repeatedly select laser cutting positioning points due to the lack of obvious features after the parts are formed. It achieves good consistency in repeated processing of parts with zero change in the laser cutting program, fast clamping speed and high precision of the parts, and shortens the overall processing time of the five-axis laser cutting process. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is made according to the specific embodiments of the present utility model in conjunction with the drawings, where

[0019] Figure 1 is the assembly drawing of the positioning fixture in the preferred embodiment of the present utility model;

[0020] Figure 2 is the cross-sectional view of the positioning fixture in the preferred embodiment of the present utility model;

[0021] Figure 3 is the exploded view of the positioning fixture in the preferred embodiment of the present utility model;

[0022] Figure 4 It is the assembly drawing of the cutting tooling in the preferred embodiment of the present utility model;

[0023] Figure 5 It is the explosion Figure 1 ;

[0024] Figure 6 It is the explosion of the cutting tooling in the preferred embodiment of the present utility model Figure 2 。

[0025] Explanation of reference numerals in the drawings of the specification: positioning tooling 100, cutting tooling 200, punch 1, first positioning hole 11, first positioning pin 12, first through hole 13, first U-shaped groove 14, arc convex part 15, die 2, second positioning hole 21, second through hole 22, second U-shaped groove 23, arc groove 24, drill bushing 3, base 4, third through hole 41, third positioning pin hole 42, mounting hole 43, first positioning platform 5, second positioning pin 51, third positioning pin 52, first support block 6, second support block 7, convex platform 71, bolt 72, second positioning platform 8. Specific embodiments

[0026] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the illustrated embodiments are not intended to limit the present utility model.

[0027] Refer to Figure 1 、 4 As shown, the tooling for laser cutting of the present utility model includes: a positioning tooling 100 and a cutting tooling 200. The positioning tooling 100 is used to drill positioning holes on the part to be cut before cutting, and the cutting tooling 200 is used to support the part to be cut when the laser machine cuts the part to be cut.

[0028] Among them, the positioning tooling 100 includes a punch 1, a die 2 and a drill bushing 3. A part to be cut is provided between the punch 1 and the die 2, and the punch 1 and the die 2 are buckled together to position the part to be cut. A drill bushing 3 is provided on the die 2, and the drill bushing 3 is used to position the position of the positioning hole of the part to be cut.

[0029] In addition, the cutting tooling 200 includes a base 4, a first positioning table 5, at least one first support block 6, two symmetrically arranged second support blocks 7, and a second positioning table 8. The first positioning table 5, at least one first support block 6, two symmetrically arranged second support blocks 7, and the second positioning table 8 are all fixedly arranged on the base 4. The first positioning table 5, at least one first support block 6, and the second positioning table 8 are arranged on the same straight line, and the first support block 6 is located between the first positioning table 5 and the second positioning table 8. The two symmetrically arranged second support blocks 7 are respectively located on both sides of the straight line where the first support block 6 is located. The first positioning table 5, at least one first support block 6, two symmetrically arranged second support blocks 7, and the second positioning table 8 are used to support the part to be cut. The first positioning table 5, at least one first support block 6, two symmetrically arranged second support blocks 7, and the second positioning table 8 are all designed according to the lower surface pattern of the part to be cut, so that the part to be cut and the cutting tooling 200 fit each other to the greatest extent.

[0030] As shown in Figures 1 - 3 the punch 1 is provided with a first positioning hole 11, the die 2 is provided with a second positioning hole 21, the first positioning hole 11 and the second positioning hole 21 are arranged opposite to each other, and a first positioning pin 12 is arranged between the first positioning hole 11 and the second positioning hole 21. The first positioning pin 12 is used for positioning between the punch 1 and the die 2. The punch 1 is provided with a first through hole 13, the die 2 is provided with a second through hole 22, the first through hole 13 and the second through hole 22 are communicated, and the drill sleeve 3 is arranged at one end of the second through hole 22 away from the punch 1.

[0031] In the above structure, the punch 1 is of a rectangular body structure, and a U-shaped groove 14 is arranged at the middle position in the length direction of the punch 1. Arc-shaped convex parts 15 are arranged at both ends in the length direction of the punch 1. The arc-shaped convex parts 15 and the U-shaped groove 14 are both arranged on the end surface of the punch 1 opposite to the die 2. A U-shaped groove 23 and an arc-shaped groove 24 are arranged on the end surface of the die 2 opposite to the punch 1. The U-shaped groove 23 and the U-shaped groove 14 are arranged opposite to each other, and the arc-shaped groove 24 and the arc-shaped convex parts 15 are arranged opposite to each other. The arc-shaped groove 24 and the arc-shaped convex parts 15 are the mold surfaces of the punch 1 and the die 2, which are designed according to the lower surface pattern and the upper surface pattern of the part, ensuring the fitting degree between the part and the punch and the die.

[0032] First, place the part to be cut on the punch 1. After the pattern surface of the part to be cut is completely fitted with the arc-shaped convex parts 15, align the die closing position between the punch 1 and the die 2 through the first positioning pins 12 at both ends of the punch 1. After die closing, the gap between the punch 1 and the die 2 is the material thickness after the part is formed. This gap is used to ensure that the part cannot shake left and right in the die closing state. After the punch 1, the part to be cut and the die 2 are die closed, use a hand-held spiral drill to drill two positioning holes at the surplus parts at both ends of the part to be cut through the drill sleeves placed at both ends of the die 2.

[0033] Referring to Figures 4 - 6 As shown, positioning pins two 51 are provided at the upper ends of the first positioning table 5 and the second positioning table 8. The upper ends of the positioning pins two 51 extend out of the first positioning table 5 and the second positioning table 8. The positioning pins two 51 are used to be inserted into the positioning holes of the parts to be cut and positioned by the drill bushing 3. The hole positions where the positioning pins two 51 are placed on the first positioning table 5 and the second positioning table 8 correspond to the positioning holes drilled at the position of the drill bushing 3. After aligning the installation position of the part through the positioning holes at both ends of the part, the part to be cut is supported by the first positioning table 5, at least one first support block 6, two symmetrically arranged second support blocks 7 and the second positioning table 8, so as to avoid problems such as part displacement caused by excessive cutting gas pressure during laser cutting of the part.

[0034] The fixing structure of the second support block 7 is that the second support block 7 is in the shape of a rectangular flat plate, and convex platforms 71 are provided at both ends in the length direction of the second support block 7. Bolts 72 are provided on the convex platforms 71, and the convex platforms 71 are locked on the base 4 through the bolts 72.

[0035] In the above structure, a number of hollow through holes three 41 are provided on the base 4. The number of the first support blocks 6 is five. The through holes three 41 are located between the first positioning table 5 and the first support block 6, between adjacent first support blocks 6, and between the first support block 6 and the second positioning table 8. The number of hollow through holes three 41 is used for the pressure relief of the cutting gas ejected during the laser cutting process and to reduce the overall weight of the cutting tooling.

[0036] In the above structure, positioning pins three 52 are connected to the first positioning table 5, the first support block 6 and the second positioning table 8. A positioning pin hole three 42 is provided on the base 4, and the positioning pins three 52 are arranged in the positioning pin hole three 42.

[0037] In the above structure, a number of mounting holes 43 are provided on the base 4. Fasteners are provided in the mounting holes 43, and the base 4 is fixedly connected to the machine tool through the fasteners. The base 4 is fixedly connected to the machine tool through bolts and nuts, so as to avoid the position change of the cutting tooling 200 caused by accidental contact during the loading and unloading of parts.

[0038] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A fixture for laser cutting, characterized in that: Including: A positioning tooling and a cutting tooling. The positioning tooling is used to drill positioning holes on the part to be cut before cutting, and the cutting tooling is used to support the part to be cut when the laser cutting machine cuts the part to be cut; The positioning tooling includes a punch, a die and a drill bushing. A part to be cut is arranged between the punch and the die, and the punch and the die are buckled together to position the part to be cut. The die is provided with a drill bushing, and the drill bushing is used to position the position of the positioning hole of the part to be cut; The cutting tooling includes a base, a first positioning table, at least one first support block, two symmetrically arranged second support blocks and a second positioning table. The first positioning table, at least one first support block, two symmetrically arranged second support blocks and the second positioning table are all fixedly arranged on the base. The first positioning table, at least one first support block and the second positioning table are arranged on the same straight line, and the first support block is located between the first positioning table and the second positioning table. The two symmetrically arranged second support blocks are respectively located on both sides of the straight line where the first support block is located. The first positioning table, at least one first support block, two symmetrically arranged second support blocks and the second positioning table are used to support the part to be cut.

2. The tooling for laser cutting according to claim 1, characterized in that: The punch is provided with a first positioning hole, and the die is provided with a second positioning hole. The first positioning hole and the second positioning hole are arranged opposite to each other, and a first positioning pin is arranged between the first positioning hole and the second positioning hole. The first positioning pin is used for positioning between the punch and the die.

3. The tooling for laser cutting according to claim 1 or 2, characterized in that: The punch is provided with a first through hole, and the die is provided with a second through hole. The first through hole and the second through hole are communicated, and the drill bushing is arranged at one end of the second through hole far from the punch.

4. The tooling for laser cutting according to claim 1, wherein: The punch is of a rectangular body structure, and a U-shaped groove one is arranged at the middle position in the length direction of the punch. Arc-shaped convex parts are arranged at both ends in the length direction of the punch. The arc-shaped convex parts and the U-shaped groove one are both arranged on the end face of the punch opposite to the die.

5. The tooling for laser cutting according to claim 4, characterized in that: A U-shaped groove two and an arc-shaped groove are arranged on the end face of the die opposite to the punch. The U-shaped groove two and the U-shaped groove one are arranged opposite to each other, and the arc-shaped groove and the arc-shaped convex part are arranged opposite to each other.

6. The fixture for laser cutting according to claim 1, wherein: Positioning pins two are arranged at the upper ends of the first positioning table and the second positioning table. The upper ends of the positioning pins two extend out of the first positioning table and the second positioning table. The positioning pins two are used to insert into the positioning holes of the part to be cut positioned by the drill bushing.

7. The tooling for laser cutting according to claim 1, characterized in that: The second support block is in the shape of a rectangular flat plate, and convex platforms are arranged at both ends in the length direction of the second support block. Bolts are arranged on the convex platforms, and the convex platforms are locked on the base through the bolts.

8. The fixture for laser cutting according to claim 1, wherein: A number of hollow through holes three are arranged on the base. The number of the first support blocks is five. The through holes three are located between the first positioning table and the first support blocks, between adjacent first support blocks, and between the first support blocks and the second positioning table.

9. The tooling for laser cutting according to claim 1, wherein: Positioning pins three are connected to the first positioning table, the first support blocks and the second positioning table. Positioning pin holes three are arranged on the base, and the positioning pins three are arranged in the positioning pin holes three.

10. The fixture for laser cutting according to claim 1, wherein: A number of mounting holes are arranged on the base. Fasteners are arranged in the mounting holes, and the base is fixedly connected to the machine tool through the fasteners.

Images