Auxiliary clamping and shock absorbing structure and clamping and shock absorbing device for intermittent cutting of cylindrical workpiece

Abstract

This invention relates to the field of intermittent cutting technology, specifically an auxiliary clamping and vibration damping structure and device for intermittent cutting of cylindrical workpieces. The structure includes a counterweight, a clamping block, a connecting rod, and a rotating center seat. The counterweight and clamping block are respectively connected to both ends of the connecting rod. The connecting rod is rotatably connected to the rotating center seat, allowing it to rotate relative to the rotating center seat in a vertical plane. The counterweight itself experiences a weight of G1; the centrifugal force experienced by the counterweight during the rotation of the cylindrical workpiece is F1; the distance from the center of mass of the counterweight to the rotation center of the connecting rod is L1; the clamping block itself experiences a weight of G2; the centrifugal force experienced by the clamping block during the rotation of the cylindrical workpiece is F2; ​​and the distance from the center of mass of the clamping block to the rotation center of the connecting rod is L2. The following formula is satisfied: [(F1+G1)*L1]-[(F2+G2)*L2]>0. The advantages of this invention are improved flexible clamping and vibration damping during intermittent cutting of cylindrical workpieces, thereby improving workpiece machining quality.

Description

Technical Field

[0001] The invention relates to the technical field of intermittent cutting processing, and in particular to an auxiliary clamping and shock absorbing structure and a clamping and shock absorbing device for intermittent cutting of a cylindrical workpiece. Background Art

[0002] The existing intermittent cutting parts are processed by ordinary cylinders, which can only achieve jaw clamping or internal expansion tooling. If a long workpiece is clamped, the clamping distance will be insufficient and the clamping force will be insufficient. In order to ensure the clamping effect, the clamping force is too large, resulting in deformation of the workpiece.

[0003] During intermittent cutting, when the previous machining surface is completed and the next surface cutting work is carried out, the tool will contact the next new machining surface again. At the moment the tool contacts the workpiece, a new force with rotation speed and feed will be generated, causing the workpiece to vibrate slightly.

[0004] In addition, due to the limitations of part structure, processing benchmarks, and clamping areas, the clamping process may cause part deformation, inadequate clamping, or tool vibration, resulting in various poor part processing problems, such as: size does not meet requirements, part surface vibration marks, and surface clamping marks. In addition, the existing rigid clamping is prone to problems such as workpiece clamping deformation and workpiece surface clamping, resulting in parts not meeting size or appearance requirements, thereby greatly reducing the processing quality and pass rate of the workpiece. Summary of the invention

[0005] The present invention aims to solve the technical problem of poor workpiece clamping effect during intermittent cutting, and provides a cylindrical workpiece intermittent cutting auxiliary clamping and shock absorbing structure and a clamping and shock absorbing device that play the role of shock absorption and clamping parts during the processing and improve the workpiece processing quality.

[0006] For the purpose of the present invention, the following technical solutions are adopted to achieve the goal:

[0007] A cylindrical workpiece intermittent cutting auxiliary clamping and shock absorbing structure comprises a counterweight block, a clamping block, a connecting rod and a rotating center seat; the counterweight block and the clamping block are respectively connected to the two ends of the connecting rod; the connecting rod is rotatably connected to the rotating center seat so that the connecting rod can rotate relative to the rotating center seat on a vertical plane; the weight of the counterweight block itself is G1; the centrifugal force of the counterweight block when the cylindrical workpiece rotates is F1; the distance from the center of mass of the counterweight block to the rotation center of the connecting rod is L1; the weight of the clamping block itself is G2; the centrifugal force of the clamping block when the cylindrical workpiece rotates is F2; ​​the distance from the center of mass of the clamping block to the rotation center of the connecting rod is L2; ​​and the following formula is satisfied: [(F1+G1)*L1]-[(F2+G2)*L2]>0. The structure satisfies [(F1+G1)*L1]-[(F2+G2)*L2]>0. When the comprehensive force value of the F1G1 end is greater than that of the F2G2 end, it can play a flexible auxiliary clamping function after a certain speed is increased; the vibration force generated during the equipment and processing, its force value is not broken

[0008] When [(F1+G1)*L1]-[(F2+G2)*L2]>0 is in balance, the vibration force can be absorbed.

[0009] As a preference, it further comprises a rotating shaft; a rotating shaft seat is arranged on the rotating center seat; the connecting rod is rotatably connected to the rotating shaft seat via the rotating shaft. The rotating shaft facilitates the rotation of the connecting rod, thereby facilitating the clamping block to clamp.

[0010] Preferably, the connecting rod is provided with an installation cavity, and the rotating shaft seat is located in the installation cavity. The rotating shaft seat is inserted into the installation cavity, and the connecting rod can be swung left and right through the rotating shaft, so that the auxiliary clamping structure can be clamped better.

[0011] Preferably, the rotation center seat is located below the connecting rod; the first limiting point and the second limiting point for limiting the rotation angle of the connecting rod are arranged on both sides of the rotation center of the connecting rod on the rotation center seat. The first limiting point and the second limiting point on the rotation center seat limit the bottom surface of the connecting rod, thereby better controlling the rotation angle.

[0012] Preferably, the clamping block includes a counterweight portion and a clamping portion; the clamping portion and the counterweight portion are detachably connected. The counterweight portion facilitates better quality control, and the clamping portion reduces the rigid clamping of the workpiece, preventing the workpiece from being deformed by clamping and the surface of the workpiece from being damaged.

[0013] Preferably, a mounting groove is provided on the side of the counterweight part in the direction of rotating and clamping the workpiece, and the clamping part is fixedly connected to the mounting groove by bolts, thereby improving the connection strength between the clamping part and the counterweight part.

[0014] Preferably, the clamping portion is provided with a clamping notch at one end facing the cylindrical workpiece, which matches the outer peripheral wall of the cylindrical workpiece, so as to better fit the surface of the cylindrical workpiece and improve the clamping effect.

[0015] Preferably, the counterweight block is provided with a first connection slot matched with the connecting rod; a first block is provided at one end of the connecting rod; the first block matches with the first connection slot; and the counterweight block and the first block are fixedly connected by bolts, thereby improving the connection strength between the connecting rod and the first counterweight block.

[0016] Preferably, the clamp block is provided with a second connection slot matched with the connection rod; the other end of the connection rod is provided with a second block; the second block matches with the second connection slot, and the clamp block and the second block are fixedly connected by bolts, so as to improve the connection strength between the connection rod and the second counterweight block.

[0017] A clamping and damping device for intermittent cutting of a cylindrical workpiece comprises a clamping tool and at least two auxiliary clamping structures mentioned above; the rotating center seat on each auxiliary clamping structure is fixedly arranged on the clamping claw of the clamping tool.

[0018] An auxiliary clamping and shock-absorbing structure for intermittent cutting of a cylindrical workpiece adopts the above technical solution. The clamping function can be realized by the structure when the formula [(F1+G1)*L1]-[(F2+G2)*L2]>0 is satisfied; the magnitude of the clamping force is related to the magnitude of the value obtained by the formula, and the larger the value obtained, the greater the clamping force. By using flexible materials for the clamping part on the clamping block, the flexible clamping force and the vibration force offset each other, thereby achieving shock absorption. Part of the vibration force can be absorbed. It is inserted into the installation cavity through the rotating shaft seat, and the connecting rod is conveniently swung left and right through the pin shaft, which facilitates the auxiliary clamping structure to clamp better. The rigid clamping of the workpiece is reduced by the clamping part to prevent the workpiece from being clamped and deformed and the workpiece surface from being clamped.

[0019] In summary, the advantages of the present invention are to improve the flexible clamping effect and the shock absorbing effect during the intermittent cutting process of a cylindrical workpiece, thereby improving the workpiece processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a force diagram of the auxiliary clamping and shock absorbing structure for intermittent cutting of a cylindrical workpiece according to the present invention.

[0021] Figure 2 It is a schematic diagram of force analysis of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the intermittent cutting auxiliary clamping and shock absorbing structure of a cylindrical workpiece according to the present invention.

[0023] Figure 4It is an exploded view of the intermittent cutting auxiliary clamping and shock absorbing structure of a cylindrical workpiece according to the present invention.

[0024] Figure 5 It is a structural schematic diagram of the intermittent cutting clamping device for a cylindrical workpiece of the present invention.

[0025] Among them: 1-counterweight block; 11-first connecting slot; 2-clamping block; 21-second connecting slot; 201-counterweight part; 202-clamping part; 211-installation slot; 221-clamping recess; 3-connecting rod; 30-installation cavity; 31-first clamping block; 32-second clamping block; 4-rotation center seat; 41-rotating shaft seat; 5-pin shaft; 6-clamping tool; 61-clamping part. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 4 As shown, a cylindrical workpiece intermittent cutting auxiliary clamping and shock absorbing structure comprises a counterweight block 1, a clamping block 2, a connecting rod 3, a rotating center seat 4 and a rotating shaft 5; the counterweight block 1 and the clamping block 2 are respectively connected to the two ends of the connecting rod 3; the connecting rod 3 is rotatably connected to the rotating center seat 4, so that the connecting rod 3 can rotate relative to the rotating center seat 4 in a vertical plane; the gravity exerted on the counterweight block 1 itself is G1; the centrifugal force exerted on the counterweight block 1 when the cylindrical workpiece rotates is F1; the distance from the center of mass of the counterweight block 1 to the rotation center of the connecting rod 3 is L1; the gravity exerted on the clamping block 2 itself is G2; the centrifugal force exerted on the clamping block 2 when the cylindrical workpiece rotates is F2; ​​the distance from the center of mass of the clamping block 2 to the rotation center of the connecting rod 3 is L2; ​​and the following formula is satisfied: [(F1+G1)*L1]-[(F2+G2)*L2]>0. The clamping function can be realized by this structure when the formula [(F1+G1)*L1]-[(F2+G2)*L2]>0 is satisfied; the magnitude of the clamping force is related to the magnitude of the value obtained by the formula, and the larger the value obtained, the greater the clamping force. The clamping part on the clamp block adopts flexible materials, so that the flexible clamping force and the vibration force offset each other to achieve shock absorption. It can absorb part of the vibration force. It is inserted into the installation cavity through the rotating shaft seat, and the connecting rod is conveniently swung left and right through the pin shaft, which facilitates the auxiliary clamping structure to better clamp. The clamping part reduces the rigid clamping of the workpiece to prevent the workpiece from being clamped and deformed and the surface of the workpiece from being clamped.

[0028] like Figure 4As shown, the rotating center seat 4 is provided with a rotating shaft seat 41; the connecting rod 3 is rotatably connected to the rotating shaft seat 41 through the rotating shaft 5. The rotating shaft 4 facilitates the rotation of the connecting rod 3, so that it is convenient for the clamping block to clamp. The connecting rod 3 is provided with a mounting cavity 30; the mounting cavity 30 is a mounting through hole arranged in the middle of the connecting rod 3 and longitudinally passing through the connecting rod 3. The mounting through hole can provide an installation space for the rotating shaft seat 41 on the rotating center seat 4, so that the connecting rod 3 can be rotated. The rotating center seat 4 is located below the connecting rod 3, and the rotating shaft seat 41 is located in the mounting cavity 30, which can reduce the installation space occupied, and the rotating center seat 4 is provided with a first limit point 42 and a second limit point 43 for limiting the rotation angle of the connecting rod 3 on both sides of the rotation center of the connecting rod 3. The rotating center seat 4 can be directly limited, and it is also convenient to better calculate the rotation angle, so as to further cooperate with the workpiece and improve the clamping effect of the cylindrical workpiece. The first limit point 42 and the second limit point 43 are on the same horizontal line, so that the connecting rod 3 rotates back and forth along the axial direction of the rotating shaft 5, so that the clamping block 2 can clamp the cylindrical workpiece. The rotation angle of the back and forth rotation is a1. By controlling the rotation angle a1, it can better match the workpiece, which can not only facilitate the installation of the workpiece, but also control the clamping force to prevent the workpiece from being deformed or clamped during the clamping process. By controlling the position of the first limit point 42 and the second limit point 43, the rotation angle a1 of the connecting rod 3 is controlled, which is convenient for better clamping and shock absorbing effects during work. The rotation angle a1 can provide a certain amount of activity space for the connecting rod 3, which facilitates the clamping of the workpiece during the clamping process.

[0029] like Figure 4 As shown, the first counterweight 1 is provided with a first connection slot 11 that matches the connection rod 3; the second counterweight 2 is provided with a second connection slot 21 that matches the connection rod 3; the two ends of the connection rod 3 are provided with a first block 31 and a second block 32 respectively; the first block 31 matches with the first connection slot 11, and the first block 31 on the connection rod 3 is inserted into the first connection slot 11 of the first counterweight 1, so that the connection strength between the connection rod 3 and the first counterweight 1 can be improved. The second block 32 matches with the second connection slot 21, and the second block 32 on the connection rod 3 is inserted into the second connection slot 21 of the second counterweight 2, so that the connection strength between the connection rod 3 and the second counterweight 2 can be improved. The first counterweight 1 and the second counterweight 2 are respectively fixedly connected to the two ends of the connecting rod 3 by bolts. The bolts pass through the first counterweight 1 transversely and are connected to the first clamping block 31, thereby fixing the first counterweight 1 and the connecting rod 3. The bolts pass through the second counterweight 2 transversely and are connected to the second clamping block 32, thereby fixing the second counterweight 2 and the connecting rod 3, thereby improving the connection strength between the connecting rod and the first counterweight and the second counterweight.

[0030] like Figure 3 and Figure 4 As shown, the clamp block 2 includes a counterweight portion 201 and a clamping portion 202; the clamping portion 202 and the counterweight portion 201 are detachably connected, and the clamping portion 202 and the counterweight portion 201 are convenient for disassembly and assembly. The clamping portion 202 can be directly replaced according to the specifications and materials of the cylindrical workpiece, and the material of the clamping portion 202 matches the workpiece. For example, the material of the clamping portion 202 is copper, rubber, etc., which can play a flexible clamping effect. The flexible clamping clamping portion 202 reduces the rigid clamping of the workpiece, prevents the workpiece from being deformed by clamping, and prevents the surface of the workpiece from being damaged. The side of the counterweight portion 201 in the direction of rotating the workpiece is provided with a mounting groove 211; the clamping portion 202 is fixedly connected to the mounting groove 211 by bolts. The connection strength between the clamping portion 202 and the counterweight portion 201 is improved. The clamping portion 202 is provided with a clamping recess 221 that matches the outer peripheral wall of the cylindrical workpiece at one end facing the cylindrical workpiece. The clamping notch 221 facilitates better fit with the surface of the cylindrical workpiece, thereby improving the clamping effect.

[0031] The auxiliary clamping structure has the following advantages:

[0032] 1. Assist in holding tightly and also play a role in shock absorption;

[0033] 2. Improve the processing quality of parts and reduce appearance problems such as chatter marks and chipping;

[0034] 3. Improve the qualified rate of parts processing dimensions, reduce the unqualified parts dimensions caused by tool vibration or inadequate clamping, and reduce the scrapping of parts;

[0035] 4. Improve production efficiency without increasing the working hours of single-sequence workers.

[0036] like Figure 5 As shown, a clamping and shock absorbing device for intermittent cutting of a cylindrical workpiece includes a clamping tool 6 and the three auxiliary clamping and shock absorbing structures mentioned above; the rotating center seat 4 on each auxiliary clamping structure is fixedly arranged on each clamping part 61 of the clamping tool 6.

[0037] When the clamping device is in use, three or more auxiliary clamping structures are installed on the outer ring of the clamping part 61 of the general clamping fixture 6. The workpiece is installed, and the auxiliary clamping structure is in a non-clamping state. Acceleration processing is performed according to the process requirements. At this time, the fixture clamps the workpiece under the action of gravity and centrifugal force because the counterweight block 1 is heavier than the clamping block 2. Thereby, the clamping claw plays a role in stabilizing and clamping the part of the workpiece far away from the fixture when clamping the workpiece, and at the same time achieves a shock-absorbing effect. No external force is required during the use of the device, and the centrifugal force generated by the deadweight of the auxiliary clamping structure itself is used; the connecting rod 3 has a certain movable angle, which is convenient for clamping the workpiece during the part clamping process; the structures such as the counterweight block 1 and the clamping block 2 can be adjusted according to the appearance of the part; it can be used not only in the intermittent cutting process, but also in the processing of longer cylindrical parts.

[0038] In summary, the advantages of the present invention are to improve the flexible clamping effect and the shock absorbing effect during the intermittent cutting process of a cylindrical workpiece, thereby improving the workpiece processing quality.

[0039] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A cylindrical workpiece intermittent cutting auxiliary clamping and shock absorbing structure, characterized in that: The invention comprises a counterweight block (1), a clamping block (2), a connecting rod (3), a rotating center seat (4) and a rotating shaft (5); the counterweight block (1) and the clamping block (2) are respectively connected to the two ends of the connecting rod (3); the clamping block (2) comprises a counterweight part (201) and a clamping part (202); the clamping part (202) and the counterweight part (201) are detachably connected; a mounting groove (211) is provided on the side of the counterweight part (201) in the direction of rotating and clamping a workpiece; the clamping part (202) is fixed by bolts The connecting rod (3) is fixedly connected to the mounting groove (211); the clamping portion (202) is provided with a clamping recess (221) that matches the outer peripheral wall of the cylindrical workpiece at one end thereof facing the cylindrical workpiece; a rotating shaft seat (41) is provided on the rotating center seat (4); the connecting rod (3) is rotatably connected to the rotating shaft seat (41) via a rotating shaft (5), so that the connecting rod (3) can rotate relative to the rotating center seat (4) on a vertical plane; the rotating center seat (4) is located below the connecting rod (3); the rotating center seat (4 ) is provided with a first limiting point (42) and a second limiting point (43) for limiting the rotation angle of the connecting rod (3) on both sides of the rotation center of the connecting rod (3); the first limiting point (42) and the second limiting point (43) are on the same horizontal straight line; the connecting rod (3) is provided with a mounting cavity (30); the rotating shaft seat (41) is located in the mounting cavity (30); the counterweight (1) is provided with a first connecting groove (11) that cooperates with the connecting rod (3); one end of the connecting rod (3) is provided A first clamping block (31) is provided; the first clamping block (31) matches with the first connecting clamping slot (11); and the counterweight block (1) and the first clamping block (31) are fixedly connected by bolts; the clamping block (2) is provided with a second connecting clamping slot (21) matching with the connecting rod (3); the other end of the connecting rod (3) is provided with a second clamping block (32); the second clamping block (32) matches with the second connecting clamping slot (21), and the clamping block (2) and the second clamping block (32) are fixedly connected by bolts; The weight force on the counterweight (1) itself is G1; the centrifugal force on the counterweight (1) when the cylindrical workpiece rotates is F1; the distance from the center of mass of the counterweight (1) to the rotation center of the connecting rod (3) is L1; the weight force on the clamp (2) itself is G2; the centrifugal force on the clamp (2) when the cylindrical workpiece rotates is F2; ​​the distance from the center of mass of the clamp (2) to the rotation center of the connecting rod (3) is L2; ​​and the following formula is satisfied: [(F1+G1)*L1]-[(F2+G2)*L2]>0.

2. A clamping and damping device for intermittent cutting of cylindrical workpieces, characterized in that: It comprises a clamping tool (6) and an auxiliary clamping and shock absorbing structure for intermittent cutting of a cylindrical workpiece as claimed in claim 1; the rotating center seat (4) on each of the auxiliary clamping and shock absorbing structures is fixedly arranged on the clamping claw (61) of the clamping tool (6).

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