Seven-degree angle self-locking elastic sheet

Abstract

The application discloses a seven-degree-angle self-locking elastic sheet arranged between a positioning chuck and a workpiece supporting plate of a cutting machine tool, comprising an annular elastic sheet 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 plurality of supporting plate positioning planes of the workpiece supporting plate respectively; all the elastic positioning grooves are rectangular grooves extending along the radial direction of the elastic sheet body and correspond to a plurality of chuck positioning teeth on the side of the positioning chuck facing the workpiece supporting plate; each chuck positioning tooth is a strip-shaped structure extending along the radial direction of the elastic sheet body and has a trapezoidal cross section; the width of each elastic positioning groove is the width of the opening of the corresponding elastic positioning groove facing the positioning chuck and corresponding to the joint position of 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; and the application of the application can eliminate the positioning error between the positioning chuck and the workpiece supporting plate and provide the clamping precision of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of fixture manufacturing technology for cutting machine tools, and particularly to a seven-degree angle self-locking elastic sheet. Background Technology

[0002] With the increasing application of digital control and flexible manufacturing concepts in traditional manufacturing, various flexible cutting machine tools using general-purpose cutting tools and positioning chucks are widely used in various industries. Compared with traditional manufacturing, these tools significantly reduce manufacturing costs while meeting the manufacturing requirements of various personalized non-standard parts.

[0003] However, with the increasing demands for manufacturing various customized non-standard parts, adverse factors in the processing environment, such as vibration, temperature, and material fatigue, are also placing higher demands on key components such as positioning chucks in processing equipment.

[0004] In existing technologies, such as Figures 1 to 3 As shown, some industry professionals have advocated using a workpiece tray 2 with an elastic sheet 33 in conjunction with a positioning chuck 1 with a pneumatic piston to solve the problem of insufficient positioning and easy errors caused by vibration during processing.

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

[0006] Therefore, how to solve the positioning error between the positioning chuck and the workpiece tray and improve the clamping accuracy of the workpiece has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of the above-mentioned deficiencies of the prior art, the present invention 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 tray and improve the clamping accuracy of the workpiece.

[0008] To achieve the above objectives, the present invention discloses a seven-degree angle self-locking elastic sheet, which is disposed between the positioning chuck and the workpiece support plate of a cutting machine tool, including an annular elastic sheet body, and a plurality of support blocks and a plurality of elastic positioning grooves surrounding the elastic sheet body.

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

[0010] All of the aforementioned elastic positioning grooves are rectangular grooves extending radially along the main body of the elastic sheet, and correspond to a plurality of chuck positioning teeth on the side of the positioning chuck facing the workpiece tray.

[0011] Each of the chuck positioning teeth is a strip structure with a trapezoidal cross-section that extends radially along the elastic sheet body, and the width of the cross-section is larger the closer the tooth is to the positioning chuck.

[0012] The width of each elastic positioning groove is the width of the opening of the elastic positioning groove facing the positioning chuck and the corresponding chuck positioning tooth when the elastic plate body faces the positioning chuck and there is a 0.3 mm gap between the side facing the positioning chuck and all the positioning planes of the chuck.

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

[0014] Preferably, the positioning chuck includes four chuck positioning planes evenly distributed in a ring and four chuck positioning teeth evenly distributed in a ring, and each chuck positioning tooth is disposed between two adjacent chuck positioning planes, and the distance from the two nearest chuck positioning planes is equal.

[0015] Each of the elastic positioning slots has two arc-shaped elastic plates at its opening, which are connected to the two nearest support blocks and form a working surface that is flush with the two nearest support blocks and faces the positioning chuck.

[0016] More preferably, any two of the four support blocks that are furthest apart are provided with positioning pin holes, and positioning is achieved by setting a positioning pin in each of the positioning pin holes and positioning it with the workpiece support plate.

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

[0018] The beneficial effects of this invention are:

[0019] The application of this invention can solve the positioning error between the positioning chuck and the workpiece tray, and improve the clamping accuracy of the workpiece.

[0020] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0021] Figure 1 A schematic diagram of the positioning chuck and workpiece tray in the prior art is shown.

[0022] Figure 2This diagram illustrates the situation where the positioning chuck and workpiece support plate are not tightened in the prior art.

[0023] Figure 3 This diagram illustrates the prior art when the positioning chuck and workpiece tray are tensioned by Latin tension.

[0024] Figure 4 A schematic diagram of an embodiment of the present invention is shown.

[0025] Figure 5 A schematic diagram of the workpiece support plate in one embodiment of the present invention is shown.

[0026] Figure 6 This diagram illustrates a workpiece support plate connected to a support block via bolts in one embodiment of the present invention.

[0027] Figure 7 This diagram shows a cross-sectional view of the positioning chuck and workpiece support plate in one embodiment of the present invention when they are not tightened.

[0028] Figure 8 This diagram illustrates a scenario where the positioning chuck and workpiece support plate are not tightened in one embodiment of the present invention.

[0029] Figure 9 This diagram illustrates the positioning chuck and workpiece tray being tensioned via Latin tension in one embodiment of the present invention. Detailed Implementation

[0030] Example

[0031] like Figures 4 to 9 As shown, a seven-degree angle self-locking elastic sheet is disposed between the positioning chuck 1 and the workpiece support plate 2 of the cutting machine tool, including an annular elastic sheet body 3, and multiple support blocks 31 and multiple elastic positioning grooves 32 surrounding the elastic sheet body 3.

[0032] All support blocks 31 correspond to the multiple chuck positioning planes 11 extending from the positioning chuck 1 toward the workpiece pallet 2, and the corresponding number of pallet positioning planes 21 extending from the workpiece pallet 2 toward all the chuck positioning planes 11.

[0033] All elastic positioning grooves 32 are rectangular grooves extending radially along the elastic sheet body 3, and correspond to multiple 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 structure with a trapezoidal cross-section that extends radially along the elastic sheet body 3, and the closer the tooth is to the positioning chuck 1, the larger the width of the corresponding cross-section.

[0035] The width of each elastic positioning groove 32 is the width of the opening of the corresponding elastic positioning groove 32 facing the positioning chuck 1 and the corresponding chuck positioning tooth 12 when the elastic sheet body 3 faces the positioning chuck 1 and there is a 0.3 mm gap between it and all the chuck positioning planes 11.

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

[0037] In practical applications, bolts are used to fix the workpiece support plate 2 to the assembly hole 311.

[0038] In some embodiments, the positioning chuck 1 includes four chuck positioning planes 11 evenly distributed in a ring and four chuck positioning teeth 12 evenly distributed in a ring, and each chuck positioning tooth 12 is disposed between two adjacent chuck positioning planes 11, and the distance from the two nearest chuck positioning planes 11 is equal.

[0039] Each elastic positioning groove 32 has two arc-shaped elastic plates 33 at its opening, which are connected to the two nearest support blocks 31 and form a working surface that is flush with the two nearest support blocks 31 and faces the positioning chuck 1.

[0040] In some embodiments, any two of the four support blocks 31 that are furthest apart are provided with positioning pin holes, and positioning is achieved by setting positioning pins in each positioning pin hole and positioning the workpiece support plate 2.

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

[0042] In practical applications, this invention eliminates movement in the X and Y directions and rotation in the Z direction by positioning the eight edges of the four elastic positioning grooves 32 openings onto the four chuck positioning teeth 12 of the positioning chuck 1. When the workpiece pallet 2 is pulled down in a Latin motion, the arc-shaped elastic sheet 33 on the outer side of each elastic positioning groove 32 opening deforms, making the eight edges of the four elastic positioning grooves 32 openings fit more tightly onto the four chuck positioning teeth 12. Furthermore, by making the pallet positioning plane 21 of the workpiece pallet 2 and the surface of the positioning chuck 1 flat, movement in the Z direction and rotation in both the X and Y directions are eliminated. However, positioning the eight edges onto the four chuck positioning teeth 12 would cause over-positioning. To eliminate over-positioning errors, this invention deforms the arc-shaped elastic sheet 33 on the outer side of each elastic positioning groove 32 opening to make the positioning edges fit more tightly.

[0043] The present invention causes the arc-shaped elastic sheet 33 on the outer side of the opening of each elastic positioning groove 32 to deform, which can better eliminate 6 degrees of freedom, thereby improving the repeatability of positioning.

[0044] However, using thin-edge deformation reduces rigidity, leading to greater deformation at the positioning point under larger forces. Therefore, under unstable forces, this actually reduces positioning accuracy.

[0045] As can be seen from similar products, the arc-shaped elastic sheet 33 that deforms on the outer side of the opening of each elastic positioning groove 32 consists of 8 thin sheets, which will inevitably have poor rigidity. When resisting large forces, the deformation will increase with the increase of the force. In actual use, such as during machining, the cutting force varies, which will cause the 8 thin sheets to vibrate back and forth, resulting in a decrease in the accuracy of repeated positioning.

[0046] In practical applications, the deformation areas of the arc-shaped elastic sheet 33 are roughly the same. However, in this invention, an elastic positioning groove 32 is provided between every two arc-shaped elastic sheets 33. When the arc-shaped elastic sheet 33 deforms, the elastic positioning groove 32 will form an arch at the contact point of the chuck positioning tooth 12. That is to say, when the deformation area is deformed, the arch structure formed by the corresponding elastic positioning groove 32 is tightening, which can more perfectly clamp the chuck positioning tooth 12.

[0047] The angle between the side of the waist of the cross section of each chuck positioning tooth 12 and the vertical direction is 7°, which gives the elastic positioning groove 32 a self-locking function when it locks the chuck positioning tooth 12, further increasing rigidity and enabling it to withstand greater cutting forces. In addition, the arched structure formed by the deformation of the elastic positioning groove 32 clamps the chuck positioning tooth more perfectly, further improving the positioning accuracy of the elastic plate.

[0048] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A seven-degree angle self-locking elastic plate, disposed between the positioning chuck (1) and the workpiece support plate (2) of a cutting machine tool; characterized in that, It includes an annular elastic sheet body (3), and a plurality of support blocks (31) and a plurality of elastic positioning grooves (32) surrounding the elastic sheet body (3). All of the support blocks (31) correspond to the plurality of chuck positioning planes (11) extending from the positioning chuck (1) toward the workpiece pallet (2) and the corresponding number of pallet positioning planes (21) extending from the workpiece pallet (2) toward all the chuck positioning planes (11). All of the elastic positioning grooves (32) are rectangular grooves extending radially along the elastic sheet body (3), and correspond to a plurality of chuck positioning teeth (12) on the side of the positioning chuck (1) facing the workpiece tray (2); Each of the chuck positioning teeth (12) is a strip structure with a trapezoidal cross-section that extends 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 opening of the elastic positioning groove (32) facing the positioning chuck (1) and the corresponding chuck positioning tooth (12) when the elastic sheet body (3) is spaced 0.3 mm apart from all the chuck positioning planes (11). The positioning chuck (1) includes four chuck positioning planes (11) evenly distributed in a ring, and four chuck positioning teeth (12) evenly distributed in a ring. Each of the chuck positioning teeth (12) is disposed between two adjacent chuck positioning planes (11), and the distance from the two nearest chuck positioning planes (11) is equal. Each of the elastic positioning grooves (32) has two arc-shaped elastic plates (33) at its opening, which are connected to the two nearest support blocks (31) and form a working surface that is flush with the two nearest support blocks (31) and faces the positioning chuck (1). The angle between the side of the waist of the cross section of each chuck positioning tooth (12) and the vertical direction is 7°±10%.

2. The seven-degree angle 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 tray (2).

3. The seven-degree angle self-locking elastic sheet according to claim 1, characterized in that, Of the four support blocks (31), any two support blocks (31) that are furthest apart are provided with positioning pin holes, and positioning is achieved by setting a positioning pin in each of the positioning pin holes and positioning it with the workpiece support plate (2).

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