Workpiece clamping device for cylindrical grinding machine

Abstract

The utility model discloses a workpiece clamping device for a cylindrical grinding machine, which comprises a workbench and the cylindrical grinding machine, and the upper surface of the workbench is respectively provided with a clamping structure capable of clamping a workpiece and a damping structure capable of damping the workpiece. According to the workpiece clamping device for the cylindrical grinding machine, one end of a workpiece is placed among three clamping blocks, then gas enters a mounting cylinder along a gas inlet ring and drives a piston to move rightwards, so that a guide rod and a conical ring can be driven to move rightwards, and when the conical ring moves rightwards, the conical surface of the conical ring is in contact with a guide wheel; according to the device, the conical surface of the conical ring is in contact with the guide wheel, so that the three clamping blocks can be driven to be close to one another, the fit clearance is smaller, the centering of a part can be more accurate, the conical ring and the guide wheel are designed outside, and the clamping blocks can be driven to be close to one another to clamp the workpiece. And when the conical ring and the guide wheel are abraded, the conical ring and the guide wheel can be quickly replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding machine fixtures, and particularly relates to a workpiece clamping device for an external cylindrical grinding machine. Background Art

[0002] An external cylindrical grinding machine is a grinding machine for machining the outer surface and the shaft shoulder end face of a workpiece with a cylindrical, conical or other shape generatrix. It is the most widely used and can machine various cylindrical and conical outer surfaces and shaft shoulder end face grinding machines.

[0003] When clamping the outer circle of a workpiece, an external cylindrical grinding machine mostly uses a pneumatic three-jaw chuck. However, when using a pneumatic three-jaw chuck to clamp a workpiece, we found that: since the cutting allowance reserved when the external cylindrical grinding machine grinds the workpiece is small, and in the design of the pneumatic three-jaw chuck, the matching mode of the components driving the clamping block to move is clearance fit, a large centering error will occur after long-term use, resulting in workpiece eccentricity and causing damage to the workpiece during processing. For this reason, we propose a workpiece clamping device for an external cylindrical grinding machine. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a workpiece clamping device for an external cylindrical grinding machine to solve the technical problems raised in the background art.

[0005] To achieve the above purpose, the specific technical solution of the utility model is as follows: A workpiece clamping device for an external cylindrical grinding machine includes a workbench and an external cylindrical grinding machine. A clamping structure for clamping the workpiece and a damping structure for damping the workpiece are respectively arranged on the upper surface of the workbench;

[0006] The clamping structure includes a motor and a pneumatic telescopic rod respectively fixedly installed on the upper surface of the workbench. A thimble is fixedly installed at the telescopic end of the pneumatic telescopic rod. An installation cylinder is fixedly installed at the output end of the motor. Three sliding grooves are circumferentially arranged at the right end of the installation cylinder. A slider is slidably installed on the inner wall of the sliding groove. A guiding groove is arranged on the right side surface of the slider. A clamping block is slidably installed on the inner wall of the guiding groove. An adjusting component for adjusting the position of the clamping block is arranged on the inner wall of the guiding groove, and a driving component for driving the slider to move is arranged on the right side surface of the installation cylinder;

[0007] The driving component includes a guiding rod slidably installed on the inner wall of the installation cylinder. The right end of the guiding rod extends to the outside of the installation cylinder and is fixedly installed with an adapter ring. A piston is fixedly installed at the left end of the guiding rod. A conical ring is fixedly installed at the right end of the adapter ring through a bolt. A through hole is arranged on the inner wall of the sliding groove. A sliding rod is slidably installed on the inner wall of the through hole. One end of the sliding rod is fixedly installed with a guiding wheel through a bolt. The other end of the sliding rod is fixedly connected with one side of the slider. The surface of the installation cylinder is rotatably connected with an air inlet ring through a sealed bearing. An air pipe connector is arranged on the surface of the air inlet ring, and a gas channel is arranged on the surface of the installation cylinder.

[0008] Preferably, the adjusting assembly includes a threaded rod rotatably connected to the inner wall of the guiding groove. A threaded hole adapted to the threaded rod is formed on the surface of the clamping block, and one end of the threaded rod extends to the outside of the slider and is provided with an adjusting nut.

[0009] Preferably, a compression spring is sleeved on the surface of the sliding rod. One end of the compression spring is fixedly connected to the surface of the mounting cylinder, and the other end of the compression spring is fixedly connected to the mounting end of the guiding wheel.

[0010] Preferably, both the conical ring and the connecting ring are sleeved on the outer ring surface of the mounting cylinder.

[0011] Preferably, the damping structure includes a mounting groove formed on the upper surface of the workbench. A threaded column is rotatably connected to the inner wall of the mounting groove. A damping plate is helically driven on the surface of the threaded column, and the surface of the damping plate is slidably connected to the inner wall of the mounting groove.

[0012] Preferably, a groove is formed on the surface of the damping plate, and a roller is rotatably connected to the inner wall of the groove.

[0013] The workpiece clamping device for an external cylindrical grinding machine of the present utility model has the following advantages:

[0014] 1. For the workpiece clamping device for an external cylindrical grinding machine, by setting the clamping structure, one end of the workpiece is placed between the three clamping blocks. Then, gas enters the inside of the mounting cylinder along the air inlet ring and the gas passage, and drives the piston to move to the right, thereby driving the guiding rod and the conical ring to move to the right. When the conical ring moves to the right, the conical surface of the conical ring will contact the guiding wheel, thereby forcing the three sliding rods and the three clamping blocks to approach each other to clamp the workpiece. Compared with the prior art, the device uses the contact between the conical surface of the conical ring and the guiding wheel to drive the three clamping blocks to approach each other, with a smaller fit clearance, so that the centering of the part can be more accurate. Moreover, the conical ring and the guiding wheel are designed outside, and when the conical ring and the guiding wheel are worn, they can be quickly replaced.

[0015] 2. For the workpiece clamping device for an external cylindrical grinding machine, by setting the damping structure, after the workpiece is fixed by the clamping structure, then rotate the threaded column, and use the helical drive between the threaded column and the damping plate to drive the roller to contact the side surface of the workpiece. When the external cylindrical grinding machine grinds the workpiece, the roller can support the side surface of the part, thereby avoiding the problem of workpiece vibration during the machining process of the external cylindrical grinding machine due to the excessive length of the workpiece. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the present utility model;

[0018] Figure 2 Schematic diagram of the side sectional structure of the shock absorption structure of the present utility model;

[0019] Figure 3 Schematic diagram of the front sectional structure of the clamping structure of the present utility model;

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the clamping structure of the present utility model;

[0021] Figure 5 For Figure 3 The enlarged structure diagram at position A in

[0022] Explanation of the marks in the figure: 1 workbench, 2 external cylindrical grinder, 3 motor, 4 pneumatic telescopic rod, 5 mounting cylinder, 6 slider, 7 clamping block, 8 guide rod, 9 connecting ring, 10 piston, 11 conical ring, 12 sliding rod, 13 guide wheel, 14 air inlet ring, 15 threaded rod, 16 adjusting nut, 17 compression spring, 18 thimble, 19 threaded column, 20 shock absorption plate, 21 roller, 22 gas channel, 23 trachea connector. Specific embodiments

[0023] In the following text, only some exemplary embodiments are briefly described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present utility model. Therefore, the drawings and descriptions are considered to be exemplary in nature rather than restrictive.

[0024] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by terms such as "length", "vertical", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the embodiments of the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0026] In the embodiments of the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0027] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of the present utility model. To simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0028] To better understand the purpose, structure, and function of the present utility model, the following further describes in detail a workpiece clamping device for an external cylindrical grinding machine of the present utility model with reference to the accompanying drawings.

[0029] As Figures 1-5 shown, a workpiece clamping device for an external cylindrical grinding machine of the present utility model includes a workbench 1 and an external cylindrical grinding machine 2. A clamping structure for clamping the workpiece and a shock-absorbing structure for shock-absorbing the workpiece are respectively arranged on the upper surface of the workbench 1.

[0030] The clamping structure includes a motor 3 and a pneumatic telescopic rod 4 respectively and fixedly installed on the upper surface of the workbench 1. An installation cylinder 5 is fixedly installed at the output end of the motor 3. Three sliding grooves are circumferentially arranged at the right end of the installation cylinder 5. A slider 6 is slidably installed on the inner wall of the sliding groove. A guiding groove is formed on the right side surface of the slider 6, and a clamping block 7 is slidably installed on the inner wall of the guiding groove.

[0031] An adjusting component for adjusting the position of the clamping block 7 is arranged on the inner wall of the guiding groove. The adjusting component includes a threaded rod 15 rotatably connected to the inner wall of the guiding groove. A threaded hole adapted to the threaded rod 15 is formed on the surface of the clamping block 7. One end of the threaded rod 15 extends to the outside of the slider 6 and is provided with an adjusting nut 16. Rotating the adjusting nut 16 can drive the threaded rod 15 to rotate. By using the screw drive between the threaded rod 15 and the clamping block 7, the clamping block 7 can be driven to move. By changing the positions of the three clamping blocks 7, workpieces with different diameters can be clamped.

[0032] An air inlet ring 14 is rotatably connected to the surface of the installation cylinder 5 through a sealing bearing. A tracheal connector 23 is arranged on the surface of the air inlet ring 14. A gas channel 22 is formed on the surface of the installation cylinder 5. A driving component for driving the slider 6 to move is arranged on the right side surface of the installation cylinder 5. The driving component includes a guiding rod 8 slidably installed on the inner wall of the installation cylinder 5. A return spring is sleeved on the surface of the guiding rod 8. The right end of the guiding rod 8 extends to the outside of the installation cylinder 5 and is fixedly installed with an adapter ring 9. The left end of the guiding rod 8 is fixedly installed with a piston 10. Connect the tracheal connector 23 to an external air supply system. When the external air supply system supplies air into the air inlet ring 14, the air in the air inlet ring 14 will enter the installation cylinder 5 along the gas channel 22, thereby driving the piston 10 and the guiding rod 8 to move to the right. At this time, the return spring is in a compressed state.

[0033] The right end of the adapter ring 9 is fixedly installed with a conical ring 11 through a bolt. Both the conical ring 11 and the adapter ring 9 are sleeved on the outer ring surface of the installation cylinder 5. A through hole is formed on the inner wall of the sliding groove. A sliding rod 12 is slidably installed on the inner wall of the through hole. One end of the sliding rod 12 is fixedly installed with a guiding wheel 13 through a bolt. The other end of the sliding rod 12 is fixedly connected to one side of the slider 6. When the guiding rod 8 moves to the right, the conical ring 11 can be driven to move to the right. At this time, the conical surface of the conical ring 11 will contact the guiding wheel 13, thereby forcing the three sliding rods 12 and the three clamping blocks 7 to approach each other to clamp the workpiece. A compression spring 17 is sleeved on the surface of the sliding rod 12. One end of the compression spring 17 is fixedly connected to the surface of the installation cylinder 5. The other end of the compression spring 17 is fixedly connected to the installation end of the guiding wheel 13. When the clamping block 7 clamps the workpiece, the compression spring 17 is in a contracted state at this time. When the conical ring 11 moves to the left, the compression spring 17 can be reset to drive the slider 6 and the clamping block 7 to reset and separate from the workpiece.

[0034] The telescopic end of the pneumatic telescopic rod 4 is fixedly installed with a thimble 18. After the workpiece is clamped by the clamping block 7, then driving the pneumatic telescopic rod 4 can drive the thimble 18 to contact the other end of the workpiece, so as to further fix the part. Compared with the prior art, this device uses the conical surface of the conical ring 11 to contact the guide wheel 13 to drive the three clamping blocks 7 to approach each other, and the clearance is smaller, so that the centering of the part can be more accurate. And the conical ring 11 and the guide wheel 13 are designed outside. When the conical ring 11 and the guide wheel 13 are worn, the conical ring 11 and the guide wheel 13 can be quickly replaced.

[0035] The damping structure includes a mounting groove opened on the upper surface of the workbench 1. The inner wall of the mounting groove is rotatably connected with a threaded column 19. A damping plate 20 is helically driven on the surface of the threaded column 19. Grooves are opened on the surface of the damping plate 20. The inner wall of the groove is rotatably connected with a roller 21, and the surface of the damping plate 20 is slidably connected with the inner wall of the mounting groove.

[0036] After the workpiece is fixed by the clamping structure, then rotate the threaded column 19. By the helical drive between the threaded column 19 and the damping plate 20, the roller 21 can be driven to contact the side surface of the workpiece. When the external cylindrical grinder 2 grinds the workpiece, the roller 21 can support the side surface of the part, so as to avoid the problem of workpiece vibration during the processing of the external cylindrical grinder 2 due to the excessive length of the workpiece.

[0037] It can be understood that the present invention is described by some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, these features and embodiments can be variously changed or equivalently replaced. In addition, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A workpiece clamping device for a cylindrical grinding machine, comprising a worktable (1) and a cylindrical grinding machine (2), characterized in that: The upper surface of the workbench (1) is respectively provided with a clamping structure capable of clamping a workpiece and a shock absorbing structure capable of absorbing shock of the workpiece; The clamping structure comprises a motor (3) and a pneumatic telescopic rod (4) respectively fixedly mounted on the upper surface of a workbench (1); a pin (18) is fixedly mounted on the telescopic end of the pneumatic telescopic rod (4); a mounting cylinder (5) is fixedly mounted on the output end of the motor (3); three sliding grooves are provided at the right end of the mounting cylinder (5) in a circular array; a slider (6) is slidably mounted on the inner wall of the sliding groove; a guide groove is provided on the right side of the slider (6); a clamping block (7) is slidably mounted on the inner wall of the guide groove; an adjusting component capable of adjusting the position of the clamping block (7) is provided on the inner wall of the guide groove; and a driving component capable of driving the slider (6) to move is provided on the right side of the mounting cylinder (5); The driving assembly comprises a guide rod (8) slidably mounted on the inner wall of the mounting cylinder (5), the right end of the guide rod (8) extends to the outside of the mounting cylinder (5) and is fixedly mounted with a connecting ring (9), a piston (10) is fixedly mounted on the left end of the guide rod (8), a conical ring (11) is fixedly mounted on the right end of the connecting ring (9) by bolts, a through hole is provided on the inner wall of the sliding groove, a sliding rod (12) is slidably mounted on the inner wall of the through hole, a guide wheel (13) is fixedly mounted on one end of the sliding rod (12) by bolts, and the other end of the sliding rod (12) is fixedly connected to one side of the slider (6), an air intake ring (14) is rotatably connected to the surface of the mounting cylinder (5) by a sealing bearing, a gas pipe connector (23) is provided on the surface of the air intake ring (14), and a gas channel (22) is provided on the surface of the mounting cylinder (5).

2. A workpiece clamping device for a cylindrical grinding machine according to claim 1, characterized in that: The adjustment assembly comprises a threaded rod (15) rotatably connected to the inner wall of the guide groove, a threaded hole matching the threaded rod (15) is provided on the surface of the clamping block (7), and one end of the threaded rod (15) extends to the outside of the slider (6) and is provided with an adjustment nut (16).

3. The workpiece clamping device for a cylindrical grinding machine according to claim 1, characterized in that: A compression spring (17) is sleeved on the surface of the sliding rod (12), one end of the compression spring (17) is fixedly connected to the surface of the mounting tube (5), and the other end of the compression spring (17) is fixedly connected to the mounting end of the guide wheel (13).

4. The workpiece clamping device for a cylindrical grinding machine according to claim 1, characterized in that: The conical ring (11) and the connecting ring (9) are both sleeved on the outer ring surface of the installation cylinder (5).

5. The workpiece clamping device for a cylindrical grinding machine according to claim 1, characterized in that: The shock absorbing structure comprises a mounting groove provided on the upper surface of the workbench (1), the inner wall of the mounting groove being rotatably connected with a threaded column (19), the surface of the threaded column (19) being spirally driven with a shock absorbing plate (20), and the surface of the shock absorbing plate (20) being slidably connected with the inner wall of the mounting groove.

6. A workpiece clamping device for a cylindrical grinding machine according to claim 5, characterized in that: A groove is provided on the surface of the damping plate (20), and a roller (21) is rotatably connected to the inner wall of the groove.

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