Precise suction jig for laser cutting

Abstract

The utility model provides a kind of precision suction fixture for laser cutting, including fixed frame and suction structure, suction structure is connected in fixed frame, for suction workpiece to carry out laser cutting, the suction structure includes suction group and suction plate, the suction plate is equipped with negative pressure cavity, suction group is connected in suction plate and is communicated with negative pressure cavity;The top surface of the suction plate is also equipped with several suction holes and several dust extraction holes and negative pressure cavity intercommunication, several suction holes correspond to the profile arrangement of workpiece, to supply uniform suction workpiece, several dust extraction holes are arranged outside workpiece, and the impurities generated by suction cutting;Suction hole and dust extraction hole are also equipped with trajectory groove between them, for placing workpiece. The precision suction fixture for laser cutting is simple in structure, greatly improves the stability of suction and cutting precision.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting technology, and in particular to a precision adsorption fixture for laser cutting. Background Technology

[0002] With the advancement of technology, the application range of precision parts is becoming wider and wider, while the requirements for the precision of parts are also getting higher and higher. Existing traditional machining equipment can no longer meet the needs. For example, when performing small-sized (3mm×10mm) thin sheet cutting operations, there are various problems such as inconvenience in fixing, easy deformation and displacement during the cutting process, and the need for small cutting size and high precision.

[0003] Therefore, laser cutting machines are needed to complete the cutting operation. When processing small parts, laser cutting machines often use negative pressure to adsorb the workpiece onto the processing platform. However, ordinary processing platforms simply have uniformly spaced adsorption holes on the surface with relatively large diameters, which can easily lead to unstable adsorption or deformation of the workpiece. In addition, during the cutting process, the cutting path may align with the adsorption holes, causing the adsorption holes at that location to fail or the resulting adsorption force to become unstable. This can cause the workpiece to shift, affecting processing accuracy. Furthermore, failed adsorption holes can suck in cutting waste, clogging the holes and making them difficult to clean. Utility Model Content

[0004] In view of the above, this utility model provides a precision adsorption fixture with a simple structure that can increase stability and improve cutting accuracy during laser cutting.

[0005] The technical solution involved in this utility model is:

[0006] A precision adsorption fixture for laser cutting includes a fixed frame and an adsorption structure. The adsorption structure is connected to the fixed frame and is used to adsorb workpieces for laser cutting. The adsorption structure includes an air extraction group and an adsorption plate. The adsorption plate has a negative pressure chamber. The air extraction group is connected to the bottom surface of the adsorption plate and communicates with the negative pressure chamber. The top surface of the adsorption plate has a plurality of adsorption holes and a plurality of dust extraction holes, all of which communicate with the negative pressure chamber. The adsorption holes are arranged to correspond to the contour of the workpiece, and the dust extraction holes are arranged around the outer periphery of the workpiece to extract impurities generated during cutting. A track groove is also provided between the adsorption holes and the dust extraction holes for placing the workpiece.

[0007] Furthermore, the fixing frame includes a base plate and two side plates. The base plate is fixed to the laser cutting machine tool by screws, and the two side plates are arranged parallel to each other on the base plate, with the top surfaces of the two side plates located on the same horizontal plane, so that the adsorption structure can be horizontally installed on the two side plates.

[0008] Furthermore, the air extraction assembly is mounted on the top of the two side plates and includes an adsorption base plate and an adapter. The adapter is connected to the adsorption base plate and extends downward to connect the air extraction device.

[0009] Furthermore, the adapter is connected to the negative pressure chamber to extract air from the negative pressure chamber.

[0010] Furthermore, the diameter of each dust extraction hole is larger than the diameter of each adsorption hole, and the dust or waste generated by laser cutting enters the negative pressure chamber through the dust extraction hole.

[0011] Furthermore, the plurality of adsorption holes and the plurality of dust extraction holes are divided into multiple groups, with each group of adsorption holes and dust extraction holes corresponding to a processed part.

[0012] Furthermore, the trajectory groove corresponds to the outline of the workpiece and the processing path, so that the workpiece can be completely horizontally attached to the surface of the adsorption plate.

[0013] Furthermore, the adsorption plate is a smooth metal plate or a plastic plate.

[0014] The beneficial effects of this utility model are:

[0015] This utility model discloses a precision adsorption fixture for laser cutting. By designing mutually cooperating adsorption holes, dust extraction holes, and trajectory grooves on the adsorption plate, the adsorption holes attract the non-machined contour areas of the workpiece, ensuring stable adsorption force during cutting and effectively preventing workpiece displacement due to changes in adsorption force, thus avoiding reduced cutting accuracy. The dust extraction holes, located around the workpiece, collect impurities generated during cutting, keeping the adsorption plate surface clean. Furthermore, the trajectory grooves on the adsorption plate between the adsorption holes and dust extraction holes correspond to the periphery of the workpiece and the cutting path, allowing the workpiece to be perfectly horizontally attached to the top surface of the adsorption plate, improving the cutting quality at the point of contact with the top surface. Thus, through the structural design of the adsorption plate, the stability and processing quality of the workpiece are effectively improved, thereby enhancing processing accuracy. Attached Figure Description

[0016] Figure 1 This is a perspective view of a precision adsorption fixture for laser cutting according to the present invention;

[0017] Figure 2 This is an exploded view of a precision adsorption fixture for laser cutting according to this utility model;

[0018] Figure 3 This is a cross-sectional view of a precision adsorption fixture for laser cutting according to the present invention;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] The annotations in the attached figures are explained as follows:

[0021] 101. Processed parts; 1. Fixing frame; 11. Base plate; 12. Side plate; 2. Adsorption structure; 21. Air extraction group; 211. Adsorption base plate; 212. Adapter; 22. Adsorption plate; 221. Negative pressure chamber; 222. Adsorption hole; 223. Dust extraction hole; 224. Track groove. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] Please see Figures 1 to 4 This utility model provides a precision adsorption fixture for laser cutting. The fixture is mounted on a laser cutting machine and is used to hold the workpiece 101 against its surface for laser cutting. The precision adsorption fixture includes a mounting frame 1 and an adsorption structure 2. The mounting frame 1 is positioned below the laser cutting head, and the adsorption structure 2 is mounted on top of the mounting frame 1 to adsorb the workpiece 101 before laser cutting.

[0024] The adsorption structure 2 includes an air extraction assembly 21 connected to an air extraction device (not shown) and an adsorption plate 22 mounted on the air extraction assembly 21. The adsorption plate 22 is fixedly connected to the air extraction assembly 21 by screws and is screwed onto the mounting bracket 1. The top surface of the adsorption plate 22 corresponds vertically to the laser cutting head, so that the laser cutting head can emit lasers to cut the workpiece 101 adsorbed on the top surface of the adsorption plate 22.

[0025] In this embodiment, the fixing frame 1 includes a base plate 11 and two side plates 12. The base plate 11 is provided with several screw holes and is fixed to the laser cutting machine tool by inserting screws. The two side plates 12 are arranged parallel to each other on the base plate 11, and the top surfaces of the two side plates 12 are located on the same horizontal plane so that the adsorption structure 2 can be horizontally installed on the two side plates 12.

[0026] The extraction assembly 21 is mounted on the top of the two side plates 12 and includes an adsorption base plate 211 and an adapter 212. The adapter 212 is connected to the adsorption base plate 211 and extends downward to connect to the extraction device so that the extraction device can extract the gas above the adsorption base plate 211.

[0027] The adsorption plate 22 is provided with a negative pressure chamber 221 for extracting gas. An adsorption base plate 211 is connected to the bottom surface of the adsorption plate 22, allowing the adapter 212 to communicate with the negative pressure chamber 221. This allows air in the negative pressure chamber 221 to be extracted through the adapter 212, creating a negative pressure within the chamber. Furthermore, the top surface of the adsorption plate 22 has several adsorption holes 222, each communicating with the negative pressure chamber 221, allowing air above the adsorption plate 22 to enter the chamber through these holes. At this time, each adsorption hole 222 on the top surface of the adsorption plate 22 has a negative pressure, enabling the workpiece 101 to adhere tightly to the adsorption plate 22.

[0028] Furthermore, the adsorption holes 222 are arranged in several groups, and the shape of each group of adsorption holes 222 is the same as the shape of the workpiece 101. They avoid the area where the workpiece 101 is cut, so as to avoid changing the number of adsorption holes 222 acting on the workpiece 101 during the cutting process, causing the adsorption force received by the workpiece 101 to change, which in turn causes the workpiece 101 to move and affects the accuracy of the cutting process.

[0029] Furthermore, each set of adsorption holes 222 is provided with several dust extraction holes 223 at equal intervals around its outer periphery to extract dust or debris generated during laser cutting. This prevents impurities from adhering to the surface of the adsorption plate 22, affecting the levelness of the workpiece 101 placed on the top surface of the adsorption plate 101, and thus reducing the laser cutting accuracy. At the same time, it also prevents cutting impurities from clogging the adsorption holes 222, reducing the adsorption force on the workpiece 101, and causing the workpiece 101 to move during the cutting process due to insufficient adsorption force.

[0030] Furthermore, the diameter of each dust extraction hole 223 is larger than the diameter of each adsorption hole 222, so that the dust or waste generated by laser cutting enters the negative pressure chamber 221 through the dust extraction hole 223 for collection.

[0031] Furthermore, a trajectory groove 224 is provided between each set of adsorption holes 222 and the corresponding dust extraction hole 223. Each trajectory groove 224 corresponds to the shape of the workpiece 101 and the cutting path, so that when the workpiece 101 is placed on the adsorption plate 22, burrs or deformation around the workpiece are avoided, and there is a gap between the workpiece 101 and the surface of the adsorption plate 22, reducing the adsorption force of the adsorption holes 222 on the workpiece 101. At the same time, it avoids the laser energy from converging and affecting the cutting position accuracy and reducing the cutting quality when the cutting position is close to the surface of the adsorption plate 22, thus preventing defects such as remelted layer, burrs, ablation, residue, microcracks and edge chipping.

[0032] Furthermore, since the surface of the adsorption plate 22 is provided with a trajectory groove 224 that corresponds to the processing trajectory of the workpiece 101, the laser only contacts the workpiece 101 and does not contact or affect the adsorption plate 22. This allows the adsorption plate 22 to be made of plastic or metal, making it easy to smooth the surface and enhance its adsorption capacity for the workpiece 101.

[0033] This invention discloses a precision adsorption fixture for laser cutting. By designing mutually cooperating adsorption holes 222, dust extraction holes 223, and trajectory grooves 224 on the adsorption plate 22, the adsorption holes 222 adsorb the non-processed contour areas of the workpiece 101, ensuring stable adsorption force during cutting and effectively preventing displacement of the workpiece 101 due to changes in adsorption force, thus reducing cutting accuracy. The dust extraction holes 223, arranged around the workpiece 101, facilitate the collection of impurities generated during cutting, keeping the surface of the adsorption plate 22 clean. Furthermore, the trajectory grooves 224 on the adsorption plate 22, located between the adsorption holes 222 and the dust extraction holes 223, correspond to the periphery of the workpiece 101 and the cutting path, allowing the workpiece 101 to be completely horizontally attached to the top surface of the adsorption plate 22, improving the cutting quality at the position where it is attached to the top surface of the adsorption plate 22. Thus, through the structural design of the adsorption plate 22, the stability and processing quality of the workpiece 101 are effectively improved, thereby enhancing processing accuracy.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A precision adsorption fixture for laser cutting, comprising a fixed frame (1) and an adsorption structure (2), wherein the adsorption structure (2) is connected to the fixed frame (1) and is used to adsorb a workpiece (101) for laser cutting, characterized in that, The adsorption structure (2) includes an air extraction group (21) and an adsorption plate (22). The adsorption plate (22) is provided with a negative pressure chamber (221). The air extraction group (21) is connected to the bottom surface of the adsorption plate (22) and communicates with the negative pressure chamber (221). The top surface of the adsorption plate (22) is provided with a plurality of adsorption holes (222) and a plurality of dust extraction holes (223). The plurality of adsorption holes (222) and the plurality of dust extraction holes (223) are all connected with the negative pressure chamber (221). The plurality of adsorption holes (222) are arranged in accordance with the outline of the workpiece (101). The plurality of dust extraction holes (223) are arranged around the outer periphery of the workpiece (101) to extract impurities generated during cutting. A track groove (224) is also provided between the adsorption holes (222) and the dust extraction holes (223) for placing the workpiece (101).

2. The precision adsorption fixture for laser cutting according to claim 1, characterized in that, The mounting bracket (1) includes a base plate (11) and two side plates (12). The base plate (11) is fixed to the laser cutting machine tool by screws. The two side plates (12) are arranged parallel to each other on the base plate (11), and the top surfaces of the two side plates (12) are on the same horizontal plane so that the adsorption structure (2) can be horizontally installed on the two side plates (12).

3. The precision adsorption fixture for laser cutting according to claim 2, characterized in that, The air extraction assembly (21) is mounted on the top of two side plates (12) and includes an adsorption base plate (211) and an adapter (212). The adapter (212) is connected to the adsorption base plate (211) and extends downward to connect the air extraction device.

4. The precision adsorption fixture for laser cutting according to claim 3, characterized in that, The adapter (212) is connected to the negative pressure chamber (221) to extract air from the negative pressure chamber (221).

5. The precision adsorption fixture for laser cutting according to claim 1, characterized in that, The diameter of each dust extraction hole (223) is larger than the diameter of each adsorption hole (222). The dust or waste generated by laser cutting enters the negative pressure chamber (221) through the dust extraction hole (223).

6. The precision adsorption fixture for laser cutting according to claim 1, characterized in that, The plurality of adsorption holes (222) and the plurality of dust extraction holes (223) are divided into multiple groups, and each group of adsorption holes (222) and dust extraction holes (223) corresponds to a workpiece (101).

7. The precision adsorption fixture for laser cutting according to claim 1, characterized in that, The trajectory groove (224) corresponds to the outline of the workpiece (101) and the processing path, so that the workpiece (101) can be completely horizontally attached to the surface of the adsorption plate (22).

8. The precision adsorption fixture for laser cutting according to claim 1, characterized in that, The adsorption plate (22) is a smooth metal plate or a plastic plate.

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