CN223544653U - A centering clamping device and machine tool for gear machining - Google Patents
A centering clamping device and machine tool for gear machiningInfo
- Publication number
- CN223544653U CN223544653U CN202422754704.XU CN202422754704U CN223544653U CN 223544653 U CN223544653 U CN 223544653U CN 202422754704 U CN202422754704 U CN 202422754704U CN 223544653 U CN223544653 U CN 223544653U
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- clamping device
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Abstract
The utility model provides a centering clamping device for gear machining and a machine tool, and belongs to the field of machining clamping devices. The centering clamping device for gear machining comprises a base, a transmission body and at least three positioning sliding blocks, wherein a slideway for guiding each positioning sliding block is arranged on the base, one end of each positioning sliding block extends out of a clamping end and forms a clamping head for radially tightly supporting the inner wall of a positioning hole on a workpiece, the transmission body comprises a guiding part and a matching part, and a transmission structure for driving each positioning sliding block to move along the corresponding slideway when the transmission body axially moves is arranged between the matching part and the positioning sliding blocks. The machine tool comprises a machine table and a centering clamping device which is arranged on the machine table and is used for gear machining. The utility model uses the inclined moving slide block to tightly support the positioning hole of the workpiece so as to realize centering and clamping of the workpiece, can be suitable for positioning holes with various different sizes, and has simple structure and lower manufacturing cost.
Description
Technical Field
The utility model belongs to the field of machining clamping devices, and particularly relates to a centering clamping device for gear machining and a machine tool.
Background
Some workpieces need to be positioned by taking an inner hole of the workpiece as a positioning reference, such as a gear, in the machining process, and currently, centering shafts and expansion sleeves are commonly used for positioning the workpieces.
In order to ensure positioning accuracy, the clearance between the centering shaft and the positioning hole on the workpiece is required to be smaller by utilizing the centering shaft for positioning, but the mounting difficulty of the workpiece is larger, the operation efficiency is lower, and the centering shaft can only position the positioning hole with one size, so that the positioning requirements of different workpieces are difficult to meet.
The workpiece can be conveniently installed by adopting the expansion sleeve for positioning, and the positioning error generated by the manufacturing tolerance of the positioning hole can be eliminated after the expansion sleeve is expanded, so that the accuracy of the positioning precision is improved. However, the large-diameter expansion sleeve is difficult to process, and the requirement on the processing technology of the expansion sleeve is high, so that the manufacturing cost is relatively high. In addition, the workpiece is clamped by the expansion sleeve through deformation of the expansion sleeve, and the expansion sleeve is limited by the expansion amount, so that the same expansion sleeve cannot be suitable for a positioning hole with a size exceeding the expansion amount range, and the application range of the expansion sleeve is still smaller.
Disclosure of utility model
The utility model aims to provide a centering clamping device for gear machining, which aims to solve the technical problem that the application range of centering shaft and expansion sleeve positioning to the size of a workpiece positioning hole is smaller in the prior art.
Another object of the present utility model is to provide a machine tool to solve the above technical problems.
In order to achieve the above purpose, the technical scheme of the centering clamping device for gear processing provided by the utility model is as follows:
The utility model provides a centering clamping device for gear processing, which comprises a base, the transmission body and at least three location slider, the axial one end of base is the clamping end for being used for the clamping work piece, be equipped with the slide that leads to each location slider respectively on the base, each slide slope sets up and the center extension line gathers in the epaxial one point of base center, the clamping end is stretched out to the one end of location slider and this end is for being used for radially propping up the dop of locating hole on the work piece, the transmission body includes guide part and cooperation portion, be provided with the guiding hole that is used for carrying out the direction to the guide part along the axial on the base, be provided with the transmission structure that is used for driving each location slider and follow corresponding slide and remove when the axial movement of transmission body between cooperation portion and the location slider, the transmission body is connected with the actuating lever that is used for driving transmission body axial displacement.
As a further improvement, the chuck of the positioning slide block is close to the central axis of the base, one end of the positioning slide block, which is far away from the chuck, is far away from the central axis of the base, and the end face of the clamping end of the base is perpendicular to the central axis of the base and forms a positioning face for axially positioning the workpiece.
As a further improvement, the matching part radially protrudes out of the guide part, a pressed elastic piece is arranged between the base and one end face of the matching part, which is axially close to the clamping end, and the elastic piece is used for cooperating with the driving rod to enable the matching part to move in a direction away from the clamping end.
As a further improvement, the part of the positioning slide block adjacent to the clamping head is a clamping neck, and an anti-interference groove is formed in one side of the clamping neck away from the central shaft of the base.
As a further improvement, the base comprises an outer sleeve and an inner sleeve which is arranged in the outer sleeve in a rotation-stopping way, the outer sleeve is provided with an inner conical surface, the inner sleeve is provided with an outer conical surface matched with the inner conical surface, and the inner conical surface of the outer sleeve and/or the outer conical surface of the inner sleeve are provided with grooves for forming a slideway.
As a further development, the inner sleeve has a central bore extending axially through the inner sleeve, said central bore forming said guide bore.
As a further improvement, the base also comprises an end plate fixedly arranged at one axial end of the outer sleeve, the end plate is in stop fit with the end face of the large end of the inner sleeve, and the end plate is provided with an avoidance hole or an avoidance groove for avoiding the positioning slide block.
As a further improvement, one of the matching part and the positioning slide block is provided with a slide groove, the other one of the matching part and the positioning slide block is provided with a sliding protrusion which is in sliding fit with the slide groove, the sliding direction of the sliding protrusion relative to the slide groove is perpendicular to the central axis of the base, and the sliding protrusion and the slide groove form a transmission structure.
As a further improvement, the engaging portion is of a disc structure, and the edge of the engaging portion constitutes the sliding projection.
The centering clamping device for gear machining has the beneficial effects that the centering clamping device for gear machining provided by the utility model belongs to the development of utility models. The centering clamping device for gear machining is provided with at least three positioning sliding blocks capable of obliquely sliding in the base, the positioning sliding blocks can synchronously act under the drive of the transmission body, and after all the positioning sliding blocks are outwards expanded, the positioning sliding blocks can be tightly supported on the inner wall of a positioning hole of a workpiece, so that the clamping and centering of the workpiece are realized. Because each positioning slide block is mutually independent, compared with the prior art, the positioning slide block has a larger movement range, can be further suitable for positioning holes with larger size ranges, and enhances the universality of the centering clamping device for gear machining.
In order to achieve the above purpose, the technical scheme of the machine tool provided by the utility model is as follows:
The utility model provides a lathe, including the board, be provided with centering clamping device on the board, centering clamping device includes the base, the transmission body and at least three location slider, the axial one end of base is the clamping end that is used for the clamping work piece, be equipped with the slide that leads to each location slider respectively on the base, each slide slope sets up and the center extension line gathers in the epaxial one point of base center, the clamping end is stretched out to the one end of location slider and this end is for being used for radially stretching up the chuck of locating hole on the work piece, the transmission body includes guide part and cooperation portion, be provided with the guiding hole that is used for carrying out the axial to the guide part on the base, be provided with between cooperation portion and the location slider and be used for driving each location slider along the transmission structure who corresponds the slide and remove when transmission body axial displacement, the transmission body is connected with the actuating lever that is used for driving transmission body axial displacement.
As a further improvement, the chuck of the positioning slide block is close to the central axis of the base, one end of the positioning slide block, which is far away from the chuck, is far away from the central axis of the base, and the end face of the clamping end of the base is perpendicular to the central axis of the base and forms a positioning face for axially positioning the workpiece.
As a further improvement, the matching part radially protrudes out of the guide part, a pressed elastic piece is arranged between the base and one end face of the matching part, which is axially close to the clamping end, and the elastic piece is used for cooperating with the driving rod to enable the matching part to move in a direction away from the clamping end.
As a further improvement, the part of the positioning slide block adjacent to the clamping head is a clamping neck, and an anti-interference groove is formed in one side of the clamping neck away from the central shaft of the base.
As a further improvement, the base comprises an outer sleeve and an inner sleeve which is arranged in the outer sleeve in a rotation-stopping way, the outer sleeve is provided with an inner conical surface, the inner sleeve is provided with an outer conical surface matched with the inner conical surface, and the inner conical surface of the outer sleeve and/or the outer conical surface of the inner sleeve are provided with grooves for forming a slideway.
As a further development, the inner sleeve has a central bore extending axially through the inner sleeve, said central bore forming said guide bore.
As a further improvement, the base also comprises an end plate fixedly arranged at one axial end of the outer sleeve, the end plate is in stop fit with the end face of the large end of the inner sleeve, and the end plate is provided with an avoidance hole or an avoidance groove for avoiding the positioning slide block.
As a further improvement, one of the matching part and the positioning slide block is provided with a slide groove, the other one of the matching part and the positioning slide block is provided with a sliding protrusion which is in sliding fit with the slide groove, the sliding direction of the sliding protrusion relative to the slide groove is perpendicular to the central axis of the base, and the sliding protrusion and the slide groove form a transmission structure.
As a further improvement, the engaging portion is of a disc structure, and the edge of the engaging portion constitutes the sliding projection.
The machine tool has the beneficial effects that the machine tool provided by the utility model is an improvement on the prior art. The centering clamping device of the machine tool is provided with at least three positioning sliding blocks capable of obliquely sliding in the base, the positioning sliding blocks can synchronously act under the drive of the transmission body, and after each positioning sliding block is outwards expanded, the positioning sliding blocks can be tightly supported on the inner wall of a positioning hole of a workpiece, so that the clamping and centering of the workpiece are realized. Because each positioning slide block is mutually independent, compared with the prior art, the positioning slide block has a larger movement range, can be suitable for positioning holes with larger size ranges, and enhances the universality of the machine tool.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of a centering and clamping device for gear machining in accordance with the present utility model;
FIG. 2 is a schematic structural view of embodiment 2 of the centering and clamping device for gear machining of the present utility model;
FIG. 3 is a schematic view of the structure of embodiment 3 of the centering and clamping device for gear machining of the present utility model;
FIG. 4 is a schematic view of the structure of embodiment 5 of the centering and clamping device for gear machining of the present utility model;
fig. 5 is a schematic structural view of embodiment 7 of the centering and clamping device for gear machining in the present utility model.
Reference numerals illustrate:
1. The device comprises an outer sleeve, an inner sleeve, a 3, an end plate, a 4, an anti-rotation pin, a 5, a slide way, a 6, a positioning surface, a 7, a positioning sliding block, a 71, a clamping head, a 72, a clamping neck, a 73, a sliding groove, a 74, an anti-interference groove, a 8, a transmission body, a 81, a guiding part, a 82, a matching part, a 83, a frustum structure, a 84, a sliding bulge, a 9, a driving rod, a 10, a spiral spring, a 11, a mounting hole, a 12, a groove, a 13, an avoidance groove, a 14, a pin shaft, a 15, a cantilever, a 16, a workpiece, a 17 and a positioning hole.
Detailed Description
The present utility model is described in further detail below with reference to examples.
In order to solve the problems in the prior art, the basic idea of the utility model is to enable a plurality of mutually independent sliding blocks to synchronously move radially outwards so as to clamp and center a workpiece at the same time, thereby improving the adaptability to positioning holes with different sizes.
The utility model provides a concrete embodiment 1 of a centering clamping device for gear machining, which comprises the following steps:
A centering and clamping device for gear machining, see fig. 1, comprises a base, a transmission body 8 and a positioning slide 7.
The whole base is cylindrical, one axial end of the base is a clamping end for clamping the workpiece 16, and the end face of the clamping end can also axially position the workpiece 16, so that the end face of the clamping end also forms a positioning surface 6. The base comprises an outer sleeve 1, an inner sleeve 2 and an end plate 3.
The outer sleeve 1 is annular, the center hole of the outer sleeve is a taper hole, and the end of the small end of the taper hole of the outer sleeve 1 is a clamping end. The inner wall surface of the central hole of the outer sleeve 1 is an inner conical surface, the inner sleeve 2 is arranged in the outer sleeve 1 in a rotation-proof way, the inner sleeve 2 is provided with an outer conical surface matched with the inner conical surface on the outer sleeve 1, and the axial two end surfaces of the inner sleeve 2 are respectively aligned with the axial two end surfaces of the outer sleeve 1. The end plate 3 is fixedly arranged on the end face of the outer sleeve 1 far away from the clamping end through bolts, and meanwhile, the large end of the inner sleeve 2 is in stop fit with the end plate 3 in the axial direction, so that the inner sleeve 2 is arranged in the outer sleeve 1 through the end plate 3, an anti-rotation pin 4 is axially arranged on the end plate 3 in a penetrating mode, and a pin hole which is inserted with the anti-rotation pin 4 is formed in the end face of the large end of the inner sleeve 2. The inner sleeve 2 is fixed in the outer sleeve 1 by the end plate 3, so that the inner sleeve 2 and the outer sleeve 1 are simpler in structure, convenient to process and manufacture and convenient to better control the processing precision of the inner sleeve 2 and the outer sleeve 1.
The outer conical surface of the inner sleeve 2 is provided with a groove along the bus thereof, and the groove and the space surrounded by the inner conical surface of the outer sleeve 1 form a slide way 5 for guiding the positioning slide block 7. The three slide ways 5 are uniformly distributed along the circumferential direction of the base, and the central extension lines of the three slide ways 5 are converged at one point on the central shaft of the base. The positioning slide block 7 is of an inclined strip structure, the cross section of the positioning slide block 7 is rectangular, the positioning slide block 7 is positioned in the corresponding slide way 5 and can move obliquely along the corresponding slide way 5, one end of the positioning slide block 7 in the length direction extends out of the clamping end of the base, the clamping end of the base forms a clamping head 71 of the positioning slide block 7, and the clamping head 71 not only has displacement along the axial direction of the base, but also has displacement along the radial outward direction of the base in the process that the positioning slide block 7 moves from the clamping end of the base to a direction away from the clamping end.
The transmission body 8 comprises a guiding part 81 and a matching part 82 which are integrally manufactured in a machining mode, wherein the guiding part 81 is of a circular shaft structure, and the matching part 82 is of a disc structure. The engaging portion 82 has a disk-like structure, so that the engaging portion can be easily processed, and the engaging portion 82 can be rotated at will without affecting the use, and if the engaging portion 82 has a non-disk structure, the engaging portion 82 and the base need to be prevented from rotating. The center of the inner sleeve 2 is provided with a center hole in a penetrating way, the center hole of the inner sleeve 2 is matched with the guide part 81 of the transmission body 8 in a guiding way, and the center hole of the inner sleeve 2 forms a guide hole.
A transmission structure is arranged between the matching part 82 and the positioning slide blocks 7, and can drive each positioning slide block 7 to move obliquely along the corresponding slideway 5 when the transmission body 8 moves axially, and the transmission structure comprises a sliding groove 73 arranged on one of the matching part 82 and the positioning slide block 7 and a sliding protrusion 84 arranged on the other one. Specifically, the inner side of one end of the positioning slider 7 far away from the chuck 71 is provided with a chute 73, the depth direction of the chute 73 is perpendicular to the central axis of the base, the edge of the matching portion 82 can be inserted into the chute 73 and can slide relatively to the chute 73, the direction of the relative sliding is perpendicular to the central axis of the base, and the edge of the matching portion 82 is in transition fit with the chute 73 so as to ensure smooth relative sliding and smaller gap. The sliding projection 84 is also formed at the edge of the mating portion 82.
During the axial movement of the engaging portion 82, the engaging portion 82 applies a force in the axial direction to the side wall of the chute 73 through the axial end face thereof, so that each positioning slider 7 receives the force in the axial direction. Since the slide grooves 73 on each positioning slide block 7 are matched with the edges of the matching parts 82, the same height of each positioning slide block 7 can be kept at all times, so that the center determined by the clamping head 71 of each positioning slide block 7 is ensured to be coincident with the center axis of the base, and good centering accuracy is ensured.
The end of the mating portion 82, which is axially far from the guiding portion 81, is fixedly connected with a driving rod 9, and the driving rod 9 is used for connecting a mechanical power source, such as a hydraulic cylinder or an air cylinder, or can be connected with a manual power source, such as a screw-nut mechanism with a fixed nut. The driving rod 9 acts to apply an axial force to the mating portion 82 to drive the transmission body 8 to move axially. In processing the transmission body 8, a threaded portion may be processed at an end of the fitting portion 82 away from the guide portion 81, and a threaded hole may be processed at an end of the driving rod 9 to connect the driving rod 9 and the transmission body 8.
In the use, utilize this centering clamping device for gear processing to carry out clamping work piece 16, need utilize actuating lever 9 to apply axial force to mating portion 82, in order to avoid the condition such as deformation appears after the mating portion 82 atress is inhomogeneous and then influence centering accuracy, can process out frustum structure 83 in the side that mating portion 82 kept away from guiding portion 81 to make the screw thread position on the terminal surface of frustum structure 83's tip, can evenly diffuse all around after the frustum tip receives the power like this, thereby make the whole atress of mating portion 82 more even, avoid the effort to concentrate.
In the process of clamping the workpiece 16, a large enough pressing force is kept between the chuck 71 and the inner wall of the positioning hole 17 of the workpiece 16 to ensure good positioning accuracy, so that the matching part 82 needs to apply a large force to each positioning slide block 7 to eliminate the gap between the matching part 82 and the side wall of the sliding groove 73 on each positioning slide block 7 as much as possible. But only rely on actuating lever 9 to exert effort to mating portion 82, can make the unilateral atress of mating portion 82 great to influence mating portion 82's life, therefore be provided with the elastic component of pressure between the axial terminal surface that mating portion 82 is close to the clamping end and the base in this embodiment, this elastic component is coil spring 10 specifically, coil spring 10's in-process that extends can produce thrust, thereby cooperate actuating lever 9 to make mating portion 82 to keeping away from the direction of clamping end and remove, coil spring 10 is different with actuating lever 9 to mating portion 82's action position, be favorable to improving mating portion 82's life.
The coil springs 10 are uniformly distributed in the circumferential direction of the base, and the inner sleeve 2 of the base is provided with mounting holes 11 for mounting the coil springs 10, so that the structure is more compact, and the stability of the coil springs 10 is better. The elastic piece can also be a rubber elastic column or a wave spring, and the elastic piece can not be arranged when the clamping precision requirement is low.
In order to make the structure more compact, the end face of the big end of the inner sleeve 2 is provided with a groove 12, the diameter of the groove 12 is slightly larger than that of the matching part 82, so that the matching part 82 can be embedded into the groove 12, the corresponding position of the end plate 3 is provided with an opening equal to the groove 12 in size, the edge of the opening on the end plate 3 is also provided with a avoiding groove 13 for avoiding the positioning slide block 7, and in other embodiments, the end plate can be provided with a avoiding hole as required.
The centering and clamping device for gear machining in this embodiment needs to be fixedly installed on a machine table of a machine tool first, and each chuck 71 faces upwards. Before clamping the workpiece 16, the engaging portion 82 is located at a lower position under the urging of each coil spring 10, and each chuck 71 is also in an expanded state, so that the engaging portion 82 needs to be pushed upward by the driving rod 9 first, so that each chuck 71 is close to each other so as to extend into the positioning hole 17 of the workpiece 16.
Then the workpiece 16 is placed on the clamping end of the base, and the positioning holes 17 are sleeved outside the clamping heads 71, and the positioning surface 6 of the clamping end can play a role in supporting and axially positioning the workpiece 16. Then, the driving rod 9 is used to pull the matching portion 82 downwards, and each chuck 71 expands outwards and moves downwards, when the outer side surface of the chuck 71 contacts the hole wall of the positioning hole 17 of the workpiece 16, the expansion is further needed to be continued, so that the chuck 71 is in close contact with the hole wall of the positioning hole 17, positioning accuracy is ensured, in the process, the chuck 71 drives the workpiece 16 to be pressed on the positioning surface 6 of the base, and a gap between the workpiece 16 and the positioning surface 6 is eliminated, so that axial positioning accuracy of the workpiece 16 is ensured.
After the workpiece 16 is machined, the disassembly process is the reverse process described above, and will not be described here.
In the use process, the axis of the workpiece 16 is always in a vertical state, and the workpiece 16 is supported by the base, so that the acting force of each chuck 71 on the workpiece 16 is relatively uniform, and the centering effect is relatively good. In other embodiments, the axis of the workpiece 16 may be horizontal, where the force of gravity on the workpiece 16 may cause the workpiece 16 to vary from chuck 71 to chuck, thus requiring additional support to the workpiece 16, such as a support roller or the like.
The chuck 71 needs to be in close contact with the wall of the positioning hole 17 of the workpiece 16, so that the side of the chuck 71 facing away from the center axis of the base can be formed into an arc surface, and the extending direction of the chuck 71 needs to be parallel to the axial direction, which causes bending of the chuck 71 and the main body portion of the positioning slider 7. The position of the positioning slide block 7 adjacent to the clamping head 71, namely the bending position, is a clamping neck 72, and an interference prevention groove 74 is formed on one side of the clamping neck 72 away from the central axis of the base, so that the workpiece 16 and the positioning slide block 7 are prevented from interfering when the clamping head 71 clamps a deeper position. In other embodiments, the interference preventing groove 74 may not be provided in the positioning slider 7, and interference may be prevented by providing a chamfer or the like on the edge of the mouth portion of the positioning hole 17 of the workpiece 16.
The utility model provides a concrete embodiment 2 of a centering clamping device for gear machining, which comprises the following steps:
the present embodiment is based on embodiment 1, and is different from embodiment 1 in that the slide groove 73 is provided on the fitting portion 82 and the slide projection 84 is provided on the positioning slider 7 in the present embodiment.
Referring to fig. 2, the sliding groove 73 is a ring groove formed on the circumferential surface of the mating portion 82, the sliding protrusion 84 is located at the inner side of the end of the positioning slider 7 away from the chuck 71, and the sliding protrusion 84 faces the central axis of the base, in this embodiment, each sliding protrusion 84 is slidingly mated with the sliding groove 73, and the function principle is similar to that of embodiment 1, and will not be repeated here.
The utility model provides a specific embodiment 3 of a centering clamping device for gear machining, which comprises the following steps:
This embodiment is based on embodiment 1 and differs from embodiment 1 in that, referring to fig. 3, the transmission structure in this embodiment includes a pin 14 fixedly mounted at an end of the positioning slider 7 remote from the chuck 71, and an axis of the pin 14 is tangential to a circumferential direction of the base. In this embodiment, the mating portion 82 has three cantilevers 15 uniformly distributed in the circumferential direction, and the cantilevers 15 are provided with kidney-shaped long holes, the length direction of the kidney-shaped long holes is in the same direction as the radial direction of the base, and the pin 14 is located in the kidney-shaped long holes and can move along the length direction of the kidney-shaped long holes.
The present embodiment can also realize that the matching portion 82 drives each positioning slider 7 to move synchronously. In order to ensure stable transmission, the guiding portion 81 in this embodiment needs to have a prismatic structure, so that the transmission body 8 is prevented from rotating relative to the base.
The utility model provides a specific embodiment 4 of a centering clamping device for gear machining, which comprises the following steps:
The difference between the embodiment 1 and the embodiment 1 is that the transmission structure in the embodiment is a connecting rod hinged between the matching portion and the positioning slide blocks, and the matching portion can also be utilized to drive each positioning slide block to synchronously move, which is not described herein. In order to ensure stable transmission, the guiding portion in this embodiment needs to be in a prismatic structure so as to stop the transmission from rotating relative to the base.
The utility model provides a concrete embodiment 5 of a centering clamping device for gear machining, which comprises the following steps:
the difference between this embodiment and embodiment 1 is that, referring to fig. 4, the end plate 3 is not provided in this embodiment, the flange is provided at the large end of the inner sleeve 2, and the flange is also provided at the corresponding end of the outer sleeve 1, so that the inner sleeve 2 is directly and fixedly connected with the outer sleeve 1.
Specific embodiment 6 of the centering and clamping device for gear machining provided by the utility model:
the present embodiment is based on embodiment 1, and is different from embodiment 1 in that the base-integrated structure in the present embodiment can be processed using machining or 3D printing techniques.
The utility model provides a specific embodiment 7 of a centering clamping device for gear machining, which comprises the following steps:
This embodiment is based on embodiment 1, and differs from embodiment 1 in that, referring to fig. 5, the guide portion 81 in this embodiment is located below the engaging portion 82, and the driving lever 9 is connected to the guide portion 81. Meanwhile, the guide hole in this embodiment also needs to be adjusted according to the installation position of the guide portion 81.
In order to enable the slide way 5 to better guide the positioning slide block 7, in the embodiment, the slide way 5 is a dovetail groove arranged on the inner conical surface of the outer sleeve 1, and the positioning slide block 7 is also provided with a structure matched with the dovetail groove in a guiding way.
The utility model provides a specific embodiment 8 of a centering clamping device for gear machining, which comprises the following steps:
The present embodiment is based on embodiment 1, and is different from embodiment 1 in that the chuck of the positioning slider in this embodiment is far away from the base center axis, and one end of the positioning slider far away from the chuck is close to the base center axis, that is, the positioning surface of the base is at the end face of the large end of the inner sleeve.
In this embodiment, when the driving rod applies a pulling force, each chuck contracts, and when the driving rod applies a pushing force, each chuck expands outwards, so that the workpiece is clamped. Compared with the embodiment 1, the round shape of each chuck in the embodiment is larger in size initially, so that the chuck can be suitable for workpieces with larger positioning holes.
The utility model provides a specific embodiment of a machine tool:
The machine tool comprises a machine table and a centering clamping device mounted on the machine table, wherein the centering clamping device is the centering clamping device for gear machining in any one of the specific embodiments 1-8 of the centering clamping device for gear machining, and the description is omitted herein.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A centering clamping device for gear machining is characterized by comprising a base, a transmission body and at least three positioning sliding blocks, wherein one axial end of the base is a clamping end for clamping a workpiece, a slideway for guiding each positioning sliding block is arranged on the base, each slideway is obliquely arranged and a central extension line is converged at one point on a central shaft of the base, one end of each positioning sliding block extends out of the clamping end and is a clamping head for radially tightly supporting the inner wall of a positioning hole on the workpiece, the transmission body comprises a guide part and a matching part, a guide hole for guiding the guide part along the axial direction is formed in the base, a transmission structure for driving each positioning sliding block to move along the corresponding slideway when the transmission body moves axially is arranged between the matching part and the positioning sliding blocks, and the transmission body is connected with a driving rod for driving the transmission body to move axially.
2. The centering and clamping device for gear machining according to claim 1, wherein a chuck of the positioning slider is close to a central axis of the base, an end of the positioning slider away from the chuck is away from the central axis of the base, an end face of a clamping end of the base is perpendicular to the central axis of the base, and the end face constitutes a positioning face for axially positioning the workpiece.
3. The centering and clamping device for gear machining according to claim 2, wherein the engaging portion radially protrudes from the guide portion, a pressed elastic member is provided between an end surface of the engaging portion axially adjacent to the clamping end and the base, and the elastic member is used for moving the engaging portion away from the clamping end in cooperation with the driving lever.
4. A centering and clamping device for gear machining according to claim 2 or 3, wherein the part of the positioning slide block adjacent to the chuck is a neck, and an interference-preventing groove is formed in one side of the neck away from the central shaft of the base.
5. A centering and clamping device for gear machining as claimed in any one of claims 1-3, characterized in that the base comprises an outer sleeve and an inner sleeve mounted in the outer sleeve in a rotationally fixed manner, the outer sleeve having an inner conical surface, the inner sleeve having an outer conical surface cooperating with said inner conical surface, grooves being provided in the inner conical surface of the outer sleeve and/or in the outer conical surface of the inner sleeve for forming the slide ways.
6. The centering and clamping device for gear machining as claimed in claim 5, wherein the inner sleeve has a central bore extending axially therethrough, said central bore defining said pilot bore.
7. The centering and clamping device for gear machining according to claim 5, wherein the base further comprises an end plate fixedly installed at one axial end of the outer sleeve, the end plate is in stop fit with the end face of the large end of the inner sleeve, and an avoidance hole or an avoidance groove for avoiding the positioning slide block is formed in the end plate.
8. A centering and clamping device for gear machining according to any one of claims 1-3, wherein one of the engaging portion and the positioning slider is provided with a sliding groove, the other one is provided with a sliding protrusion for sliding engagement with the sliding groove, the sliding direction of the sliding protrusion relative to the sliding groove is perpendicular to the central axis of the base, and the sliding protrusion and the sliding groove form a transmission structure.
9. The centering and clamping device for gear machining as claimed in claim 8, wherein the mating portion is of a disc configuration, and an edge of the mating portion constitutes the sliding projection.
10. A machine tool comprising a machine table, characterized in that the machine table is provided with a centering and clamping device for gear machining according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422754704.XU CN223544653U (en) | 2024-11-12 | 2024-11-12 | A centering clamping device and machine tool for gear machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202422754704.XU CN223544653U (en) | 2024-11-12 | 2024-11-12 | A centering clamping device and machine tool for gear machining |
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| CN223544653U true CN223544653U (en) | 2025-11-14 |
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| CN202422754704.XU Active CN223544653U (en) | 2024-11-12 | 2024-11-12 | A centering clamping device and machine tool for gear machining |
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| Country | Link |
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| CN (1) | CN223544653U (en) |
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