Auxiliary clamping and positioning tool for metal sheet laser cutting
By combining a U-shaped clamp and an L-shaped plate, and utilizing the cooperation of side-pressure bolts and clamping bolts, the slippage problem when clamping thin plates is solved, thus improving the accuracy and stability of laser cutting.
Patent Information
- Application Number
- CN202520228965.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-05-15
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Existing laser cutting fixtures for thin metal sheets are prone to slipping when clamping thin sheets, resulting in low processing accuracy. In addition, there are many different fixture specifications, making selection troublesome.
The structure employs a combination of a U-shaped clamp, a first L-shaped plate, and a second L-shaped plate. Through the cooperation of side-pressure bolts and tightening bolts, the plates are directly pressed, increasing the pressure at the tightening position and reducing the risk of slippage.
It improves the clamping stability of laser cutting of thin metal sheets, reduces cutting errors, and enhances the precision of finished products.
Smart Images
Figure CN224238557U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precision machining equipment, and in particular to an auxiliary clamping and positioning fixture for laser cutting of thin metal sheets. Background Technology
[0002] Laser cutting is a commonly used high-precision metal sheet processing method. Due to the high dimensional accuracy requirements for sheet metal processing, special fixtures are generally used to clamp the sheet metal onto the laser grid during the processing. In actual processing, there are many sheet metal specifications, some thick and some thin. Therefore, on-site personnel need to select different specifications of fixtures according to the thickness of the sheet metal each time. The variety of fixture specifications is troublesome to select and they are easy to get mixed up, which is very inconvenient. To solve this problem, our company has proposed a positioning and clamping fixture that can adapt to the clamping of sheet metal of various specifications in utility model patent application number 2024222764651. However, it has been found in use that when clamping thinner sheet metal, because the structure is designed to use the edge of the clamping plate for clamping, the contact area is large, resulting in low pressure at the clamping position. Sometimes, it is easy to slip due to external forces. Utility Model Content
[0003] The main technical problem solved by this utility model is to provide an auxiliary clamping and positioning fixture for laser cutting of thin metal sheets, which can improve the stability of clamping.
[0004] To solve the above-mentioned technical problems, the present invention provides an auxiliary clamping and positioning fixture for laser cutting of thin metal sheets. The auxiliary positioning fixture includes a U-shaped clamp, a first L-shaped plate, and a second L-shaped plate. Multiple through side holes are provided on the outer side plate of the U-shaped clamp. A side pressure nut is fixedly installed on the outer side of each side hole, and a side pressure bolt of a corresponding specification is installed on each side pressure nut. The vertical plate of the first L-shaped plate is fixed to the inner side of the U-shaped clamp, and the top of the vertical plate is flush with the top of the U-shaped clamp. Thus, the horizontal plate of the first L-shaped plate forms a support platform for the auxiliary clamping and positioning fixture. The vertical plate of the second L-shaped plate is vertically fixed to the support platform, and the horizontal plate of the second L-shaped plate is parallel to the support platform and extends away from the U-shaped clamp, forming a sheet metal clamping position together with the support platform. Multiple clamping holes are provided on the horizontal plate, and a clamping nut is fixed to the outer side of each clamping hole. A clamping bolt is installed on each clamping nut.
[0005] In a preferred embodiment of this utility model, the plurality of pressing holes are evenly distributed along the same horizontal straight line, and the horizontal straight line is parallel to the fold line of the second L-shaped plate.
[0006] In a preferred embodiment of the present invention, the vertical plate of the second L-shaped plate is fixed to the top of the vertical plate of the first L-shaped plate, and the horizontal plate of the second L-shaped plate has the same dimensions as the horizontal plate of the first L-shaped plate.
[0007] In a preferred embodiment of this utility model, the side holes on the U-shaped clamp are all evenly distributed along the same horizontal straight line, which is parallel to the angle line of the first L-shaped plate.
[0008] In a preferred embodiment of this utility model, the top of the U-shaped clamp is also provided with a spare nut, and a spare bolt is installed inside the spare nut.
[0009] The beneficial effects of this utility model are as follows: This utility model is a further improvement on the existing auxiliary clamping and positioning fixture for laser cutting of our company. By modifying the structure of the plate clamping position, the original clamping plate clamping structure is changed to direct clamping with clamping bolts, which effectively increases the pressure at the clamping position, reduces the possibility of slippage after the plate is fixed, thereby improving the stability of the clamping position, reducing the error of laser cutting, and improving the precision of the finished product. Attached Figure Description
[0010] Figure 1 This is a side view of a preferred embodiment of the present invention.
[0011] The components in the attached diagram are labeled as follows:
[0012] 1. U-shaped clamp, 2. First L-shaped plate, 3. Second L-shaped plate, 4. Side pressure bolt, 5. Side pressure nut, 6. Tightening bolt, 7. Tightening nut, 8. Spare bolt, 9. Spare nut, 10. Laser grid, 11. Plate. Detailed Implementation
[0013] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0014] Please see Figure 1 The embodiments of this utility model include:
[0015] An auxiliary clamping and positioning fixture for laser cutting of thin metal sheets includes: a U-shaped clamp 1, a first L-shaped plate 2, and a second L-shaped plate 3. Two through side holes are formed on the outer side plate of the U-shaped clamp 1. The horizontal line connecting the centers of the two side holes is parallel to the bend line of the first L-shaped plate 2. Side pressure nuts 4 are welded to the outer sides of both side holes. Each side pressure nut 4 is fitted with a side pressure bolt 4 of a corresponding specification. The vertical plate of the first L-shaped plate 2 is welded to the inner side of the U-shaped clamp 1, and the top of the vertical plate is connected to the U-shaped clamp 1. The tops of the first L-shaped plate 2 are flush, forming a support platform for the auxiliary clamping and positioning fixture. The vertical plate of the second L-shaped plate 3 is vertically fixed to the support platform. The horizontal plate of the second L-shaped plate 3 is parallel to the support platform and extends away from the U-shaped clamp 1, forming a plate clamping position together with the support platform. The horizontal plate has two clamping holes, the horizontal line connecting the centers of the two clamping holes being parallel to the bend line of the second L-shaped plate 3. A clamping nut 7 is welded to the outside of each clamping hole, and a clamping bolt 6 is installed on each clamping nut 7. The vertical plate of the second L-shaped plate 3 is fixed to the top of the vertical plate of the first L-shaped plate 2, and the horizontal plate of the second L-shaped plate 3 has the same dimensions as the horizontal plate of the first L-shaped plate 2. Thus, the first L-shaped plate 2 and the second L-shaped plate 3 together form a regular clamping position, unaffected by the U-shaped clamp 1.
[0016] The top of the U-shaped clamp 1 is also provided with a spare nut 8, and a spare bolt 9 is installed inside the spare nut 8. In this way, if a bolt is lost during actual work, it can be replaced at any time.
[0017] This embodiment is mainly used to clamp thin metal sheets 1 during laser cutting. In actual use, firstly, four auxiliary clamping and positioning fixtures are symmetrically clamped in pairs onto two parallel laser grids 10 using U-shaped clamps 1. Since the tops of the laser grids 10 are all on the same plane, after clamping, the tops of all the auxiliary clamping and positioning fixtures are on the same plane. Adjust the relative positions between the laser grids 10 and between the auxiliary clamping and positioning fixtures so that the four apex corners of the metal sheet 11 to be cut are placed on the horizontal plate of the corresponding first L-shaped plate 2. First, tighten the side pressure bolts 5 on the U-shaped clamps 1 of each auxiliary clamping and positioning fixture so that the tops of the side pressure bolts 5 press against the outside of the laser grid 10. Then, tighten the clamping bolts 6 on each second L-shaped plate 3 so that the tops of the clamping bolts 6 press against the surface of the sheet 11. In this way, the pressure at the clamping position can be effectively increased, relative slippage can be reduced, thereby improving the accuracy during laser cutting.
[0018] 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 description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An auxiliary clamping and positioning fixture for laser cutting of thin metal sheets, characterized in that, The auxiliary positioning fixture includes a U-shaped clamp, a first L-shaped plate, and a second L-shaped plate. The outer side plate of the U-shaped clamp has multiple through-holes, and a side-pressure nut is fixedly installed on the outer side of each side hole. Each side-pressure nut has a side-pressure bolt of a corresponding specification installed on it. The vertical plate of the first L-shaped plate is fixed to the inner side of the U-shaped clamp, and the top of the vertical plate is flush with the top of the U-shaped clamp. Thus, the horizontal plate of the first L-shaped plate forms the support platform of the auxiliary clamping and positioning fixture. The vertical plate of the second L-shaped plate is vertically fixed to the support platform, and the horizontal plate of the second L-shaped plate is parallel to the support platform and extends away from the U-shaped clamp, forming a plate clamping position together with the support platform. The horizontal plate has multiple clamping holes, and a clamping nut is fixed to the outer side of each clamping hole. Each clamping nut has a clamping bolt installed on it.
2. The auxiliary clamping and positioning fixture for laser cutting of thin metal sheets according to claim 1, characterized in that, The plurality of pressing holes are evenly distributed along the same horizontal straight line, which is parallel to the angle line of the second L-shaped plate.
3. The auxiliary clamping and positioning fixture for laser cutting of thin metal sheets according to claim 1, characterized in that, The vertical plate of the second L-shaped plate is fixed to the top of the vertical plate of the first L-shaped plate, and the horizontal plate of the second L-shaped plate has the same dimensions as the horizontal plate of the first L-shaped plate.
4. The auxiliary clamping and positioning fixture for laser cutting of thin metal sheets according to claim 1, characterized in that, The side holes on the U-shaped clamp are all evenly distributed along the same horizontal straight line, which is parallel to the angle line of the first L-shaped plate.
5. The auxiliary clamping and positioning fixture for laser cutting of thin metal sheets according to claim 1, characterized in that, The top of the U-shaped clamp is also provided with a spare nut, and a spare bolt is installed inside the spare nut.