Seven-degree-angle self-locking elastic sheet

Abstract

The utility model discloses a seven-degree-angle self-locking elastic piece which is arranged between a positioning chuck and a workpiece supporting plate of a cutting machine tool and comprises an annular elastic piece body, a plurality of supporting blocks and a plurality of elastic positioning grooves. All the supporting blocks correspond to a plurality of chuck positioning planes of the positioning chuck and a supporting plate positioning plane of the workpiece supporting plate respectively; the elastic positioning grooves are rectangular grooves extending in the radial direction of the elastic piece body and correspond to a plurality of chuck positioning teeth on the face, facing the workpiece supporting plate, of the positioning chuck. Each chuck positioning tooth is of a strip-shaped structure which has a trapezoidal cross section and extends along the radial direction of the elastic sheet main body; the width of each elastic positioning groove is equal to the width of the position, connected with the corresponding chuck positioning teeth, of the opening, facing the positioning chuck, of the corresponding elastic positioning groove when the distance between the face, facing the positioning chuck, of the elastic piece body and all the chuck positioning planes is 0.3 mm. According to the utility model, the positioning error between the positioning chuck and the workpiece tray can be solved, and the clamping precision of the workpiece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixture manufacturing for cutting machine tools, in particular to a seven-degree angle self-locking elastic sheet. Background Art

[0002] As the concepts of digital control and flexible manufacturing continue to be applied in traditional manufacturing, various flexible cutting machine tools using universal tools and positioning chucks are widely used in various industries. Compared with traditional manufacturing, they can significantly reduce manufacturing costs while meeting the manufacturing requirements of various personalized non-standard parts.

[0003] However, with the increasing requirements for the manufacturing of various personalized non-standard parts, adverse factors in the processing environment such as vibration, temperature, material fatigue, etc. are also constantly increasing the requirements for key components such as positioning chucks in processing equipment.

[0004] In the prior art, Figures 1 to 3 As shown, some people in the industry have advocated the use of a workpiece pallet 2 with an elastic sheet 33 in combination with a positioning chuck 1 with a pneumatic piston to solve the problem of loose positioning and easy error due to vibration during processing.

[0005] However, although theoretically 6-point positioning can eliminate 6 degrees of freedom, in actual positioning, 6-point positioning cannot perfectly eliminate 6 degrees of freedom because of gaps between various components, material deformation caused by different forces, material errors caused by temperature, and other problems.

[0006] Therefore, how to solve the positioning error between the positioning chuck and the workpiece pallet and improve the clamping accuracy of the workpiece has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0007] In view of the above-mentioned defects of the prior art, the utility model provides a seven-degree angle self-locking elastic sheet, the purpose of which is to solve the positioning error between the positioning chuck and the workpiece pallet and improve the clamping accuracy of the workpiece.

[0008] To achieve the above-mentioned purpose, the utility model discloses a seven-degree angle self-locking elastic sheet, which is arranged between the positioning chuck and the workpiece support plate of a cutting machine tool, and includes a ring-shaped elastic sheet body, and a plurality of supporting blocks and a plurality of elastic positioning grooves arranged around the elastic sheet body;

[0009] All the support blocks respectively correspond to a plurality of chuck positioning planes extending from the positioning chuck toward the workpiece support plate, and a corresponding number of support plate positioning planes extending from the workpiece support plate toward all the chuck positioning planes;

[0010] All of the elastic positioning grooves are rectangular grooves extending in the radial direction of the elastic sheet body, and respectively correspond to a plurality of chuck positioning teeth on one side of the positioning chuck facing the workpiece support plate;

[0011] Each of the chuck positioning teeth is a strip-shaped structure with a trapezoidal cross section extending radially along the elastic sheet body, and the closer the position is to the positioning chuck, the larger the width of the corresponding cross section;

[0012] The width of each elastic positioning groove is the width of the position where the opening of the corresponding elastic positioning groove facing the positioning chuck connects with the corresponding chuck positioning tooth when the interval between the side of the elastic sheet body facing the positioning chuck and all the chuck positioning planes is 0.3 mm.

[0013] Preferably, each of the support blocks is provided with an assembly hole for connecting with the workpiece support plate.

[0014] Preferably, the positioning chuck comprises four chuck positioning planes uniformly distributed in an annular shape, and four chuck positioning teeth uniformly distributed in an annular shape, and each of the chuck positioning teeth is arranged between two adjacent chuck positioning planes, and is equidistant from the two nearest chuck positioning planes;

[0015] Two arc-shaped elastic sheets are provided at the opening of each elastic positioning groove and are connected to the two nearest support blocks, and form a working surface flush with the two nearest support blocks and facing the positioning chuck.

[0016] More preferably, among the four support blocks, any two support blocks that are farthest apart are provided with positioning pin holes, and positioning with the workpiece support plate is performed by providing a positioning pin in each of the positioning pin holes.

[0017] Preferably, the angle between the side surface of the waist of the corresponding cross section of each chuck positioning tooth and the vertical direction is 7°±10%.

[0018] Beneficial effects of the utility model:

[0019] The application of the utility model can solve the positioning error between the positioning chuck and the workpiece pallet and improve the clamping accuracy of the workpiece.

[0020] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram of the structure of the positioning chuck and the workpiece support plate in the prior art is shown.

[0022] Figure 2A schematic diagram showing the positioning chuck and the workpiece support plate in the prior art when they are not tightened.

[0023] Figure 3 A schematic diagram showing the positioning chuck and the workpiece support plate in the prior art when being tightened by Latin.

[0024] Figure 4 A structural schematic diagram of an embodiment of the utility model is shown.

[0025] Figure 5 A schematic structural diagram of a workpiece support plate in one embodiment of the utility model is shown.

[0026] Figure 6 A schematic diagram showing the connection between a workpiece support plate and a support block through bolts in one embodiment of the utility model.

[0027] Figure 7 A schematic diagram of the cross-sectional structure of a positioning chuck and a workpiece support plate in an embodiment of the utility model when they are not tightened is shown.

[0028] Figure 8 A schematic diagram showing a positioning chuck and a workpiece support plate in an embodiment of the utility model when they are not tightened.

[0029] Fig. 9 A schematic diagram showing a positioning chuck and a workpiece support plate in one embodiment of the utility model when being tightened by Latin. DETAILED DESCRIPTION

[0030] Example

[0031] like Figures 4 to 9 As shown, the seven-degree self-locking elastic sheet is arranged between the positioning chuck 1 and the workpiece support plate 2 of the cutting machine tool, and includes a ring-shaped elastic sheet body 3, and a plurality of supporting blocks 31 and a plurality of elastic positioning grooves 32 arranged around the elastic sheet body 3;

[0032] All the support blocks 31 correspond to a plurality of chuck positioning planes 11 extending from the positioning chuck 1 toward the workpiece support plate 2, and a corresponding number of support plate positioning planes 21 extending from the workpiece support plate 2 toward all the chuck positioning planes 11;

[0033] All the elastic positioning grooves 32 are rectangular grooves extending along the radial direction of the elastic sheet body 3, and respectively correspond to the plurality of chuck positioning teeth 12 on the side of the positioning chuck 1 facing the workpiece support plate 2;

[0034] Each chuck positioning tooth 12 is a strip-shaped structure with a trapezoidal cross section extending in the radial direction of the elastic sheet body 3, and the closer the position to the positioning chuck 1 is, the larger the width of the corresponding cross section is;

[0035] The width of each elastic positioning groove 32 is the width of the position where the opening of the corresponding elastic positioning groove 32 facing the positioning chuck 1 connects with the corresponding chuck positioning tooth 12 when the interval between the elastic sheet body 3 facing the positioning chuck 1 and all the chuck positioning planes 11 is 0.3 mm.

[0036] In some embodiments, each support block 31 is provided with an assembly hole 311 for connecting with the workpiece support plate 2 .

[0037] In practical applications, bolts are provided in the assembly holes 311 to fix the workpiece support plate 2 .

[0038] In some embodiments, the positioning chuck 1 includes four chuck positioning planes 11 evenly distributed in an annular shape, and four chuck positioning teeth 12 evenly distributed in an annular shape, and each chuck positioning tooth 12 is arranged between two adjacent chuck positioning planes 11, and is equidistant from the two nearest chuck positioning planes 11;

[0039] Two arc-shaped elastic sheets 33 are disposed at the opening of each elastic positioning groove 32 and connected to the two nearest support blocks 31 , and form a working surface flush with the two nearest support blocks 31 and facing the positioning chuck 1 .

[0040] In some embodiments, among the four support blocks 31 , any two support blocks 31 that are farthest apart are provided with positioning pin holes, and positioning is performed with the workpiece support plate 2 by providing a positioning pin in each positioning pin hole.

[0041] In some embodiments, the angle between the side surface of the waist of the cross section corresponding to each chuck positioning tooth 12 and the vertical direction is 7°±10%.

[0042] In actual application, the utility model eliminates movement in the X and Y directions and rotation in the Z direction by positioning the eight edges at the opening of the four elastic positioning grooves 32 on the four chuck positioning teeth 12 of the positioning chuck 1. When the workpiece support plate 2 is pulled downward by the Latin, the arc-shaped elastic sheet 33 on the outside of the opening of each elastic positioning groove 32 will be deformed, so that the eight edges at the opening of the four elastic positioning grooves 32 are more closely fitted on the four chuck positioning teeth 12, and then the support plate positioning plane 21 of the workpiece support plate 2 and the surface of the positioning chuck 1 are flat, eliminating movement in the Z direction and rotation in the XY directions. However, positioning the eight edges on the four chuck positioning teeth 12 will cause over-positioning. In order to eliminate the over-positioning error, the utility model allows the arc-shaped elastic sheet 33 on the outside of the opening of each elastic positioning groove 32 to deform so that the positioning edges are more closely fitted.

[0043] The utility model can better eliminate 6 degrees of freedom by deforming the arc-shaped elastic piece 33 outside the opening of each elastic positioning groove 32, thereby improving the function of repeated positioning.

[0044] However, the use of thin edge deformation will make the rigidity worse, and when the force is relatively large, it will cause greater deformation at the location. Therefore, when the force is unstable, the positioning accuracy is reduced.

[0045] It can be seen from the previous similar products that the arc-shaped elastic sheet 33 deformed outside the opening of each elastic positioning groove 32 is 8 thin sheets, and the rigidity is also poor. When resisting a large force, as the force increases, the deformation will also increase. In actual use, such as when used in mechanical processing, the cutting force is sometimes large and sometimes small, which will cause the 8 thin sheets to vibrate back and forth, making the accuracy of repeated positioning worse.

[0046] In actual applications, the deformation areas of the arc-shaped elastic sheets 33 are similar, but in the utility model, an elastic positioning groove 32 is provided between every two arc-shaped elastic sheets 33. When the arc-shaped elastic sheets 33 are deformed, the elastic positioning groove 32 forms an arch at the place where the chuck positioning teeth 12 contact. That is to say, when the deformation area is deformed, the arch structure formed by the corresponding elastic positioning groove 32 is tightened, which can clamp the chuck positioning teeth 12 more perfectly.

[0047] The angle between the side surface of the waist of the cross section corresponding to each chuck positioning tooth 12 and the vertical direction is 7°, so that the elastic positioning groove 32 can have a self-locking function when clamping the chuck positioning tooth 12, further increasing the rigidity and being able to withstand greater cutting force. The arched structure formed by the deformation of the elastic positioning groove 32 can more perfectly clamp the positioning teeth of the chuck, further improving the positioning accuracy of the elastic sheet.

[0048] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A seven-degree self-locking elastic sheet, arranged between a positioning chuck (1) and a workpiece support plate (2) of a cutting machine tool; characterized in that: It comprises an annular elastic sheet body (3), and a plurality of support blocks (31) and a plurality of elastic positioning grooves (32) arranged around the elastic sheet body (3); All the support blocks (31) respectively correspond to a plurality of chuck positioning planes (11) extending from the positioning chuck (1) toward the workpiece support plate (2), and a corresponding number of support plate positioning planes (21) extending from the workpiece support plate (2) toward all the chuck positioning planes (11); All of the elastic positioning grooves (32) are rectangular grooves extending along the radial direction of the elastic sheet body (3), and respectively correspond to a plurality of chuck positioning teeth (12) on a side of the positioning chuck (1) facing the workpiece support plate (2); Each of the chuck positioning teeth (12) is a strip-shaped structure with a trapezoidal cross section extending radially along the elastic sheet body (3), and the closer the position is to the positioning chuck (1), the larger the width of the corresponding cross section; The width of each of the elastic positioning grooves (32) is the width of the position where the opening of the corresponding elastic positioning groove (32) facing the positioning chuck (1) and the corresponding chuck positioning tooth (12) meet when the interval between the side of the elastic sheet body (3) facing the positioning chuck (1) and all the chuck positioning planes (11) is 0.3 mm.

2. The seven-degree self-locking elastic sheet according to claim 1, characterized in that: Each of the support blocks (31) is provided with an assembly hole (311) for connecting with the workpiece support plate (2).

3. The seven-degree self-locking elastic sheet according to claim 1, characterized in that: The positioning chuck (1) comprises four chuck positioning planes (11) evenly distributed in an annular shape, and four chuck positioning teeth (12) evenly distributed in an annular shape, and each of the chuck positioning teeth (12) is arranged between two adjacent chuck positioning planes (11) and is equidistant from the two nearest chuck positioning planes (11); Two arc-shaped elastic sheets (33) are provided at the opening of each elastic positioning groove (32) and are connected to the two nearest support blocks (31), and form a working surface flush with the two nearest support blocks (31) and facing the positioning chuck (1).

4. The seven-degree self-locking elastic sheet according to claim 3, characterized in that: Among the four support blocks (31), any two of the support blocks (31) that are farthest apart are provided with positioning pin holes, and positioning with the workpiece support plate (2) is performed by providing a positioning pin in each of the positioning pin holes.

5. The seven-degree self-locking elastic sheet according to claim 1, characterized in that: The included angle between the side surface of the waist of each chuck positioning tooth (12) corresponding to the cross section and the vertical direction is 7°±10%.

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