Clamping device

Abstract

The utility model discloses a clamping device, which belongs to the technical field of machining equipment and comprises a base, a chuck, a first tip, a sliding seat, an adjusting seat, a second tip, a first eccentric wheel and a second eccentric wheel. The chuck is installed on the machine base, the first center is installed on the chuck, the sliding base is arranged on the machine base in a sliding mode in the axial direction of the first center so as to be close to or away from the first center, the adjusting base is installed on the sliding base, and the second center is installed on the adjusting base. The first eccentric wheel and the second eccentric wheel are rotationally mounted on the sliding seat; the first eccentric wheel and the second eccentric wheel are both in transmission connection with the adjusting base so that the axis of the second center can be adjusted to coincide with the axis of the first center. The clamping device is simple in structure, easy to adjust and operate and capable of improving workpiece machining efficiency and quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of machining equipment, especially to a clamping device. BACKGROUND

[0002] The machining machine tool is a machine for processing metal or other material blanks or workpieces to obtain the required geometric shape, size accuracy and surface quality. The existing machining machine tool for round knife mold processing mainly uses a clamping device to clamp the round knife mold workpiece, and then uses a tool to process the round knife mold. The existing clamping device mainly includes a chuck, a first center, and a second center. The second center is installed through a slidable slide. Before clamping the round knife mold workpiece, the second center needs to be adjusted so that the second center is coaxial with the second center.

[0003] The slide of the existing clamping device generally includes a plurality of directionally moving platform stacks to realize linkage, thereby realizing the adjustment of the axial direction of the second center. The structure of the clamping device is relatively complex, the adjustment operation is cumbersome and inefficient. In particular, when the workpiece is processed for the first time on the machine tool and needs to be disassembled for other process treatment, and after the treatment, the second clamping is processed for the second time on the machine tool, the adjustment takes a long time, and the skill requirement of the worker is high. At the same time, the plurality of directionally moving platform stacks make the axial height of the second center high, the rigidity of the clamping device is greatly reduced, the machining precision is decreased, and the machining quality is affected. SUMMARY

[0004] The purpose of the embodiment of the utility model is to provide a clamping device, which is simple in structure, simple in adjustment operation, and can improve the efficiency and quality of workpiece machining.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A clamping device comprises:

[0007] A machine seat;

[0008] A chuck is installed on the machine seat;

[0009] A first center is installed on the chuck;

[0010] A slide is slidably arranged on the machine seat along the axial direction of the first center to approach or move away from the first center;

[0011] An adjustment seat is installed on the slide;

[0012] A second center is installed on the adjustment seat;

[0013] A first eccentric wheel and a second eccentric wheel are rotatably installed on the slide; the first eccentric wheel and the second eccentric wheel are in transmission connection with the adjusting seat to adjust the coincidence of the axis of the second center with the axis of the first center.

[0014] Optionally, the first eccentric wheel comprises a first wheel body and a first wheel shaft connected with the first wheel body; the second eccentric wheel comprises a second wheel body and a second wheel shaft connected with the second wheel body; the axis of the first wheel body and the axis of the first wheel shaft are spaced and parallel to each other, and the axis of the second wheel body and the axis of the second wheel shaft are spaced and parallel to each other.

[0015] The slide is provided with a first guide groove extending along the radial direction of the second center and a second guide groove extending along the radial direction of the second center; the extending direction of the first guide groove and the extending direction of the second guide groove are perpendicular to each other; the first wheel body is rotatably and slidably installed on the first guide groove through the first wheel shaft; the second wheel body is rotatably and slidably installed on the second guide groove through the second wheel shaft; the adjusting seat is provided with a first wheel hole and a second wheel hole; the first wheel body is located in the first wheel hole and the outer circumferential side surface of the first wheel body abuts against the inner wall of the first wheel hole; the second wheel body is located in the second wheel hole and the outer circumferential side surface of the second wheel body abuts against the inner wall of the second wheel hole.

[0016] Optionally, hexagonal bolts are arranged on the first wheel body and the second wheel body.

[0017] Optionally, the clamping device further comprises a locking bolt; the adjusting seat is provided with a countersunk hole, and the slide is provided with a connecting threaded hole; the hole diameter of the countersunk hole is greater than the diameter of the screw rod of the locking bolt; the adjusting seat is in threaded connection with the slide through the locking bolt in sequence through the countersunk hole and the connecting threaded hole.

[0018] Optionally, the clamping device further comprises a guide rail installed on the machine base, a sliding block slidably arranged on the guide rail along the axial direction of the first center, and a clamp installed on the guide rail; the slide is installed on the sliding block, and the clamp is connected with the sliding block.

[0019] Optionally, the clamping device further comprises a probe assembly for measuring the position of the workpiece.

[0020] Optionally, the probe assembly comprises a first probe, a second probe, a third probe and a fourth probe; the first probe is used for measuring the center position of the workpiece along the horizontal diameter direction thereof; the second probe is used for measuring the center position of the workpiece along the axial direction thereof; the third probe is used for measuring the position of the positioning surface on the workpiece parallel to the axial direction thereof; and the fourth probe is used for measuring the height position of the workpiece along the vertical diameter direction thereof.

[0021] Optionally, the chuck is a wobble compensation center chuck, the chuck further comprises a base, clamping jaws each mounted on the base, a pull rod, and a first oil cylinder; the clamping jaws are multiple and are arranged along a circumference of the first center and are spaced apart from each other, each of the clamping jaws has a clamping portion, the clamping portions of the clamping jaws together enclose a clamping gap, and each of the clamping jaws is capable of moving towards or away from each other through cooperation of the pull rod and the first oil cylinder so as to adjust a size of the clamping gap.

[0022] Optionally, a cross section of each of the clamping portions gradually decreases along a direction close to the clamping gap.

[0023] Optionally, the clamping device further comprises a second oil cylinder mounted on the slide base, and an output end of the second oil cylinder is in driving connection with the second center so as to move the second center towards the first center along an axial direction of the first center.

[0024] The second center of the clamping device is mounted on the slide base through the adjusting seat, the position of the adjusting seat is adjusted through rotation of the first eccentric wheel and the second eccentric wheel, thereby adjusting the axis of the second center, and the axis of the second center coincides with the axis of the first center. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be further explained in detail below according to the drawings and embodiments.

[0026] Figure 1 It is the structural schematic diagram of clamping device;

[0027] Figure 2 It is the explosion view of slide base, second center and adjusting seat;

[0028] Figure 3 It is the sectional view of slide base, second center and adjusting seat;

[0029] Figure 4 It is the explosion view of slide base, second center and adjusting seat;

[0030] Figure 5 It is the structural schematic diagram of slide base, first center, second center, adjusting seat and chuck;

[0031] Figure 6 It is the working schematic diagram of first probe;

[0032] Figure 7 It is the working schematic diagram of second probe;

[0033] Figure 8 is a working schematic diagram of the third probe;

[0034] Figure 9 is a working schematic diagram of the fourth probe.

[0035] Reference signs in the drawings,

[0036] 11, base; 12, chuck; 13, first center; 14, slide; 15, adjusting seat; 17, first eccentric wheel; 19, second eccentric wheel; 20, guide rail; 21, sliding block; 22, clamp; 23, first probe; 24, second probe; 25, third probe; 26, second oil cylinder; 27, sliding rail cover; 28, machine cover; 29, sliding table; 30, second center; 31, workpiece; 32, fourth probe;

[0037] 121, base; 122, clamping jaw; 123, pull rod; 124, first oil cylinder; 125, clamping part; 125, rotary table;

[0038] 141, first guide groove; 142, second guide groove; 143, connecting threaded hole;

[0039] 151, first wheel hole; 152, second wheel hole; 153, counterbore hole;

[0040] 171, first wheel body; 172, first wheel shaft;

[0041] 191, second wheel body; 192, second wheel shaft;

[0042] 311, positioning surface. DETAILED DESCRIPTION

[0043] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the embodiments of the utility model will be further described in detail below in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0044] In the description of the utility model, unless another definite provision and limitation, the term "link", "fixed", "connection", "communication", "abut", "clamping" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features not direct contact but contact through the additional feature between them. Moreover, the first feature is "on", "above" and "upper surface" of the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature. The first feature is "under", "below" and "lower surface" of the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0046] In the description herein, it needs to be understood that the orientation or position relationship of the terms "on", "under", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0047] In the description of the specification, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0048] In addition, it should be understood that, although the specification is described in terms of embodiments, not every embodiment only contains one independent technical solution, and the specification is described only for clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0049] Unless specifically stated or defined otherwise, the term "and / or" used in the utility model includes any and all combinations of one or more related listed items.

[0050] For ease of description, unless otherwise stated, the terms "up" and "down" in the following text refer to the same direction as "top" and "bottom". Figure 6 Its vertical direction is consistent with its horizontal direction, and the horizontal direction mentioned below is consistent with its vertical direction. Figure 6 Its left and right directions are consistent, and the left and right directions mentioned below are the same as those in the previous text. Figure 7 Its left and right directions are consistent.

[0051] like Figures 1 to 9 As shown, this embodiment provides a clamping device, including a base 11, a chuck 12, a first center 13, a slide 14, an adjusting seat 15, a second center 30, a first eccentric wheel 17, and a second eccentric wheel 19. The base 11 is horizontally arranged, and the chuck 12 is mounted on the base 11, including jaws 122. The first center 13 is mounted on the chuck 12 and is located within the area enclosed by multiple jaws 122. The slide 14 slides along the axial direction of the first center 13 on the base 11 to approach or move away from the first center 13. The adjusting seat 15 is mounted on the slide 14, and the second center 30 is mounted on the adjusting seat 15. The first center 13 and the second center 30 are spaced apart along the X-axis direction of the base 11, where the X-axis direction of the base 11 is... Figure 1 The first tip 13 and the second tip 30 form a feeding space. The slide 14 slides left and right along the axis of the first tip 13. During the feeding process, the workpiece 31 is placed in the feeding space. In this embodiment, the workpiece 31 is a circular die. The circular die is cylindrical. The slide 14 drives the second tip 30 to approach the first tip 13, so that the second tip 30 and the first tip 13 respectively clamp the two end faces of the circular die. The two end faces of the circular die are provided with conical holes that cooperate with the first tip 13 or the second tip 30.

[0052] The first eccentric wheel 17 and the second eccentric wheel 19 are rotatably mounted on the slide 14. Both the first eccentric wheel 17 and the second eccentric wheel 19 are connected to the adjusting seat 15 to adjust the alignment of the axis of the second tip 30 with the axis of the first tip 13. The outer circumferential surfaces of the first eccentric wheel 17 and the second eccentric wheel 19 abut against the adjusting seat 15, thereby driving the adjusting seat 15 to slide relative to the slide 14. By rotating the first eccentric wheel 17, the adjusting seat 15 can move along the first radial direction of the second tip 30. By rotating the second eccentric wheel 19, the adjusting seat 15 can move along the second radial direction of the second tip 30. Both the first radial direction and the second radial direction of the second tip 30 move in the direction of the axis of the second tip 30. In this embodiment, the axis of the second tip 30 is... Figure 7 In the left and right directions, the first radial direction of the second tip 30 is Figure 6 The left and right directions, the second radial direction of the second tip 30 is Figure 6 The up and down directions.

[0053] Therefore, the clamping device is simple in structure and convenient in adjustment. After the adjustment is completed, the first top 13 and the second top 30 jointly clamp the round knife die by sliding the sliding seat 14, so that the first top 13, the second top 30 and the round knife die are coaxial. In addition, the first eccentric wheel 17 and the second eccentric wheel 19 are used to drive the adjusting seat 15 to move up and down and front and back, so that the sliding seat 14 does not need to be divided into multiple platforms which move in different directions and are stacked from top to bottom, the installation height of the second top 30 is closer to the base 121, the axis height of the second top 30 is lower, and the rigidity of the second top 30 is higher. Therefore, the machining precision and the surface quality are not affected by the large vibration and noise generated by the machine tool during the machining process, the machining quality of the workpiece 31 is ensured, and the adverse effects on the working environment and the health of the operator are avoided. Therefore, the clamping device is simple in structure and convenient in adjustment. When the clamping device deviates due to the vibration of the machine tool after a long time of use, the first eccentric wheel 17 and the second eccentric wheel 19 can be used for rapid fine adjustment, so that the efficiency and the quality of the machining of the workpiece 31 are improved.

[0054] In one embodiment, the first eccentric wheel 17 comprises a first wheel body 171 and a first shaft 172 connected with the first wheel body 171. The second eccentric wheel 19 comprises a second wheel body 191 and a second shaft 192 connected with the second wheel body 191. The first wheel body 171 and the first shaft 172 are eccentrically arranged, the axis of the first wheel body 171 is spaced apart from the axis of the first shaft 172 and parallel to each other, and the second wheel body 191 and the second shaft 192 are eccentrically arranged, the axis of the second wheel body 191 is spaced apart from the axis of the second shaft 192 and parallel to each other.

[0055] The sliding seat 14 is provided with a first guide groove 141 extending along the radial direction of the second top 30 and a second guide groove 142 extending along the radial direction of the second top 30, the first guide groove 141 extends vertically from top to bottom, the second guide groove 142 extends horizontally from front to back, and the extending direction of the first guide groove 141 and the extending direction of the second guide groove 142 are perpendicular to each other. The first wheel body 171 is rotatably and slidably installed in the first guide groove 141 through a first wheel shaft 172, and the second wheel body 191 is rotatably and slidably installed in the second guide groove 142 through a second wheel shaft 192. The adjusting seat 15 is provided with a first wheel hole 151 and a second wheel hole 152, the first wheel hole 151 and the second wheel hole 152 are circular holes, the first wheel body 171 is located in the first wheel hole 151 and the outer circumferential side of the first wheel body 171 abuts against the circular inner wall of the first wheel hole 151, and the second wheel body 191 is located in the second wheel hole 152 and the outer circumferential side of the second wheel body 191 abuts against the circular inner wall of the second wheel hole 152. In this way, by driving the first wheel body 171 to rotate, the adjusting seat 15 moves left and right, and by driving the second wheel body 191 to rotate, the adjusting seat 15 moves up and down. Through the cooperation of the first wheel body 171 and the second wheel body 191, the axis of the second top 30 is adjusted so that the axis of the second top 30 coincides with the axis of the first top 13.

[0056] Further, hexagonal bolts are installed on the first wheel body 171 and the second wheel body 191, the hexagonal bolts have internal hexagonal holes or external hexagonal heads, which facilitate the driving of the first wheel body 171 and the second wheel body 191 to rotate by tools sleeving on the external hexagonal heads or inserting into the internal hexagonal holes.

[0057] In other embodiments, the first eccentric wheel and the second eccentric wheel are both threadedly connected with the sliding seat, and the first eccentric wheel and the second eccentric wheel are both two, the two first eccentric wheels are arranged in front and back, the two second eccentric wheels are arranged in up and down, the adjusting seat is located in the area enclosed by the two first eccentric wheels and the two second eccentric wheels and abuts against the outer circumferential side of the two first eccentric wheels and the outer circumferential side of the two second eccentric wheels, the adjusting seat is slid forward and backward by rotating the two first eccentric wheels, the adjusting seat is slid up and down by rotating the two second eccentric wheels, and then the axis of the second top 30 on the adjusting seat is adjusted to coincide with the axis of the first top.

[0058] Optionally, the clamping device further comprises a locking member. After the axis of the second top 30 is adjusted to coincide with the axis of the first top 13 by the first eccentric wheel 17 and the second eccentric wheel 19, the adjusting seat 15 and the sliding seat 14 are locked by the locking member.

[0059] Further, the locking member of the clamping device comprises locking bolts. The adjusting seat 15 is provided with countersunk holes 153, and the sliding seat 14 is provided with connecting threaded holes 143. The diameter of the countersunk hole 153 is greater than the diameter of the screw rod of the locking bolt. The adjusting seat 15 is threadedly connected with the sliding seat 14 through the locking bolt, the countersunk hole 153 and the connecting threaded hole 143 in sequence. The locking bolt, the countersunk hole 153 and the connecting threaded hole 143 are in one-to-one correspondence and are arranged in a plurality of intervals along the circumference of the second center 30. After the axis of the second center 30 coincides with the axis of the first center 13 by fine adjustment of the adjusting seat 15 by the first eccentric wheel 17 and the second eccentric wheel 19, the adjusting seat 15 and the sliding seat 14 are locked by the locking bolt.

[0060] Further, the clamping device further comprises a guide rail 20 mounted on the machine base 11, a sliding block 21 slidably arranged along the axial direction of the first center 13 on the guide rail 20, and a clamp 22 mounted on the guide rail 20. The sliding seat 14 is mounted on the sliding block 21, and the clamp 22 is connected with the sliding block 21. Specifically, the machine base 11 is provided with a slide rail cover 27 and a plurality of machine covers 28. The guide rail 20, the sliding block 21 and the clamp 22 are covered by the slide rail cover 27 and the plurality of machine covers 28, thereby playing a dustproof and waterproof role and ensuring the sliding precision of the sliding seat 14. The sliding block 21 is provided with a sliding table 29, and the sliding seat 14 is arranged on the sliding table 29, so that the sliding seat 14 can slide along the guide rail 20. The clamp 22 is started to clamp the guide rail 20, which can significantly improve the structural rigidity of the mechanical equipment, prevent shaking, deformation, shaking and vibration from being transmitted to the transmission structure, and thereby improve the stability and precision of the equipment. Therefore, the performance and stability of the clamping device can be significantly improved by the clamp 22, which meets the requirements of high precision, high efficiency and high safety of industrial automation production. Through the cooperation of the guide rail 20, the clamp 22 and the sliding block 21, the second center 30 moves and fixes in the axial direction to adapt to the circular knife mold of different lengths.

[0061] Optionally, the clamping device further comprises a probe assembly for measuring the position of the workpiece 31. Specifically, the probe assembly comprises a first probe 23. The first probe 23 is used to measure the center position of the workpiece 31 in the horizontal diameter direction thereof. The first probe 23 is used to measure the diameter of the workpiece 31 in the front-rear direction. The positions of X1 and X2 of the workpiece 31 are measured, and then the center position in the front-rear direction is calculated, that is, the midpoint position between X1 and X2.

[0062] Optionally, the probe assembly further comprises a second probe 24. The second probe 24 is used to measure the center position of the workpiece 31 in the axial direction. The second probe 24 is used to measure the length of the workpiece 31 in the left-right direction, by measuring the positions of L1 and L2 of the workpiece 31, and then calculating the center position in the left-right direction, i.e. the midpoint position between L1 and L2.

[0063] Optionally, the probe assembly further comprises a third probe 25. The third probe 25 is used to measure the position of the positioning surface 311 of the workpiece 31 parallel to the axial direction of the workpiece 31. The circular cutter die workpiece 31 is generally provided with a positioning surface 311 parallel to the axis of the circular cutter die workpiece 31, so as to position during multiple clamping, i.e. the rotation angle of the circular cutter die workpiece 31 during installation can be recorded and obtained, so as to perform the next machining of the tool. Since the positioning surface 311 is parallel to the axis of the circular cutter die workpiece 31, by measuring two points on the positioning surface 311 through the third probe 25, the position of the positioning surface 311 can be determined, i.e. the rotation angle of the circular cutter die workpiece 31 during installation is obtained, solving the problem of difficult adjustment of the center of the rotation axis and difficult search for the positioning surface 311 during repeated clamping of the circular cutter die.

[0064] The probe assembly further comprises a fourth probe 32, which is used to measure the height position Z1 of the workpiece 31 in the vertical diameter direction.

[0065] It can be understood that the first probe 23, the second probe 24, the third probe 25, and the fourth probe 32 can be different probes, or can be the same probe. The first probe 23, the second probe 24, the third probe 25, and the fourth probe 32 can be installed on a mechanical arm to realize automatic positioning detection of the workpiece 31. In this way, through the probe assembly, the position information of the circular cutter die workpiece 31 in the rotation direction and three mutual linear directions is realized. The clamping device of the present application only needs to load and unload, which is time-saving and greatly reduces the requirement for worker skills, not only saves machine adjustment time and improves production capacity, but also reduces labor cost, and also provides the possibility for subsequent automatic loading and unloading of circular cutter dies.

[0066] In one embodiment, the chuck 12 is a swing compensation type top chuck 12. The chuck 12 further comprises a base 121, clamping jaws 122 each mounted on the base 121, a pull rod 123, and a first oil cylinder 124. The clamping jaws 122 are multiple and are arranged along the circumference of the first top 13, each of the clamping jaws 122 has a clamping portion 125, the clamping portions 125 of each of the clamping jaws 122 together enclose a clamping gap, and each of the clamping jaws 122 is moved closer to or away from each other by the cooperation of the pull rod 123 and the first oil cylinder 124, so as to adjust the size of the clamping gap. The clamping jaws 122 of the swing compensation type top chuck 12 have a swing compensation function and do not have a positioning effect on the workpiece 31, and the function is only to clamp the workpiece 31 and transmit motion to the workpiece 31. Specifically, the chuck 12 further comprises a rotary table 125 arranged on the machine base 11. The base 121 is detachably mounted on the rotary table 125. The clamping jaws 122 are slidably mounted on the base 121.

[0067] When detecting whether the second top 30 is coaxial with the first top 13, first, the axis of the rotary table 125 is adjusted so that the axis of the rotary table 125 is parallel to the X-axis of the machine base, and then the workpiece 31 is clamped by the second top 30 and the first top 13, and the upper generatrix and the side generatrix of the workpiece 31 are measured. The values of the upper generatrix and the side generatrix change within the qualified range.

[0068] The present application adopts the cooperation of the first top 13, the second top 30, and the swing compensation type top chuck 12 to position and clamp the circular cutter die, and does not need to take measurements every time the workpiece is clamped. Through the center positioning and position compensation functions of the chuck 12, the workpiece 31 clamping bending caused by over-positioning is eliminated, and the machining precision is improved.

[0069] Further, the cross section of each of the clamping portions 125 gradually decreases along the direction close to the clamping gap, the contact surface of each of the clamping portions 125 with the workpiece 31 is as small as possible, the deformation of the workpiece 31 caused by over-positioning is further reduced, and the clamping precision is improved.

[0070] In one embodiment, the clamping device further comprises a second oil cylinder 26 mounted on the sliding seat 14, and the output end of the second oil cylinder 26 is in transmission connection with the second top 30 so as to move the second top 30 closer to the first top 13 along the axial direction of the first top 13. After the axis of the first top 13 is adjusted to be coaxial with the axis of the second top 30, the circular cutter die is placed in the clamping gap and abuts against the first top 13, then the second oil cylinder 26 is retracted, the chuck 12 is pulled backward by the pull rod 123, the clamping jaws of the chuck 12 swing inward to clamp the workpiece 31, and then the sliding seat 14 is driven to slide, so that the second top 30 and the first top 13 clamp the workpiece 31 together.

[0071] Because the types of the round knife die workpiece 31 are various and the lengths are different, the distance between the first center 13 and the second center 30 needs to be adjusted frequently, so the second center 30 needs to be designed to be movable, and the guide rail 20 is matched with the clamp 22 to realize the movement and fixation of the second center 30 along the axial direction of the first center 13, the second center 30 is moved to approach the length of the workpiece 31, when the worker loads the workpiece, the foot switch is stepped on, the second oil cylinder 26 is extended, and the second center 30 is pressed against the workpiece 31. When the guide rail 20 is installed, the extension direction of the guide rail 20 is parallel to the axial direction of the first center 13, so that when the axial line of the second center 30 is adjusted to coincide with the axial line of the first center 13 and the second center 30 slides along the guide rail 20, the axial line of the second center 30 is prevented from changing. When the guide rail 20 is deviated due to the vibration of the machine tool, the first eccentric wheel 17 and the second eccentric wheel 19 can be used to finely adjust the adjusting seat 15, so that the adjustment of the axial line of the second center 30 is facilitated. After the position of the second center 30 is adjusted, the second center 30 needs to be fixed, because the clamp 22 and the guide rail 20 have a certain gap, vibration and impact are inevitable during the opening and closing process, the roller guide rail 20 is adopted in the application, the rigidity of the second center 30 is improved, and the stability of the rotating axial line of the second center 30 is ensured.

[0072] The technical principles of the utility model are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the utility model, and cannot be explained as the limitation of the protection scope of the utility model in any way. Based on the explanation herein, the person skilled in the art can think of other specific embodiments of the utility model without creative labor, and these embodiments will fall within the protection scope of the utility model.

Claims

1. A clamping device, characterized in that It includes: A machine base (11); A chuck (12) mounted on the machine base (11); A first center (13) mounted on the chuck (12); A slide (14) sliding along the axial direction of the first center (13) on the machine base (11) to approach or away from the first center (13); An adjusting seat (15) mounted on the slide (14); A second center (30) mounted on the adjusting seat (15); A first eccentric wheel (17) and a second eccentric wheel (19) rotatably mounted on the slide (14); the first eccentric wheel (17) and the second eccentric wheel (19) are in driving connection with the adjusting seat (15) to adjust the axis of the second center (30) to coincide with the axis of the first center (13).

2. The clamping device of claim 1, wherein The first eccentric wheel (17) includes a first wheel body (171) and a first shaft (172) connected with the first wheel body (171); the second eccentric wheel (19) includes a second wheel body (191) and a second shaft (192) connected with the second wheel body (191); the axis of the first wheel body (171) and the axis of the first shaft (172) are spaced apart and parallel to each other, and the axis of the second wheel body (191) and the axis of the second shaft (192) are spaced apart and parallel to each other; The slide (14) is provided with a first guide groove (141) extending along the radial direction of the second center (30) and a second guide groove (142) extending along the radial direction of the second center (30), the extension direction of the first guide groove (141) and the extension direction of the second guide groove (142) are perpendicular to each other, the first wheel body (171) is rotatably and slidingly mounted on the first guide groove (141) through the first shaft (172), the second wheel body (191) is rotatably and slidingly mounted on the second guide groove (142) through the second shaft (192), the adjusting seat (15) is provided with a first wheel hole (151) and a second wheel hole (152), the first wheel body (171) is located in the first wheel hole (151) and the outer circumferential side of the first wheel body (171) abuts against the inner wall of the first wheel hole (151), the second wheel body (191) is located in the second wheel hole (152) and the outer circumferential side of the second wheel body (191) abuts against the inner wall of the second wheel hole (152).

3. The clamping device of claim 2, wherein Hexagonal bolts are arranged on the first wheel body (171) and the second wheel body (191).

4. The clamping device of claim 2, wherein It also includes locking bolts; the adjusting seat (15) is provided with a countersunk hole (153), the slide (14) is provided with a connecting threaded hole (143), the hole diameter of the countersunk hole (153) is greater than the diameter of the screw rod of the locking bolt, and the adjusting seat (15) is threadedly connected with the slide (14) through the locking bolt in sequence through the countersunk hole (153) and the connecting threaded hole (143).

5. A clamping device according to any one of claims 1 to 4, characterised in that The machine base (11) is provided with a guide rail (20), a sliding block (21) sliding along the axial direction of the first center (13) on the guide rail (20), and a clamp (22) mounted on the guide rail (20); the sliding seat (14) is mounted on the sliding block (21), and the clamp (22) is connected with the sliding block (21).

6. The clamping device according to any one of claims 1 to 4, characterized in that Further comprising a probe assembly for measuring the position of the workpiece (31).

7. The clamping device of claim 6, wherein The probe assembly comprises a first probe (23), a second probe (24), a third probe (25) and a fourth probe (32); the first probe (23) is used to measure the center position of the workpiece (31) along the horizontal diameter direction thereof, the second probe (24) is used to measure the center position of the workpiece (31) along the axial direction thereof, the third probe (25) is used to measure the position of a positioning surface (311) of the workpiece (31) parallel to the axial direction thereof, and the fourth probe (32) is used to measure the height position of the workpiece (31) along the vertical diameter direction thereof.

8. The clamping device according to any one of claims 1 to 4, characterized in that The chuck (12) is a swing compensation type center chuck (12), and the chuck (12) further comprises a base (121), clamping jaws (122), a pull rod (123) and a first oil cylinder (124), all of which are mounted on the base (121); the clamping jaws (122) are arranged in a plurality of and are spaced along the circumferential direction of the first center (13), each of the clamping jaws (122) has a clamping part (125), the clamping parts (125) of each of the clamping jaws (122) collectively form a clamping gap, and each of the clamping jaws (122) is relatively close to or away from each other through the cooperation of the pull rod (123) and the first oil cylinder (124) to adjust the size of the clamping gap.

9. The clamping device of claim 8, wherein The cross section of the clamping part (125) of each of the clamping jaws (122) gradually decreases along the direction close to the clamping gap.

10. The clamping device according to any one of claims 1 to 4, characterized in that Further comprising a second oil cylinder (26) mounted on the sliding seat (14), and the output end of the second oil cylinder (26) is in driving connection with the second center (30) to make the second center (30) close to the first center (13) along the axial direction of the first center (13).

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