CN212444957U

CN212444957U - Self-centering clamping device

Info

Publication number: CN212444957U
Application number: CN202022029706.4U
Authority: CN
Inventors: 蒋超; 王炯; 曹荣青; 华刚; 孔元; 肖超; 王赫媛; 闫智伟; 杨松华
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-02-02
Anticipated expiration: 2030-09-16

Abstract

The utility model relates to a clamping technical field discloses a from centering clamping device, include: a base plate; the adjusting assembly is arranged on the bottom plate and comprises a conical adjusting piece and an adjusting power piece, and the conical adjusting piece is arranged at the output end of the adjusting power piece; the positioning assemblies are distributed around the circumference of the conical adjusting piece, can be arranged on the bottom plate in a sliding mode along the radial direction and the circumference of the conical adjusting piece, and can be adjusted in length along the radial direction; and the clamping assembly is slidably arranged on the bottom plate. The utility model discloses a from centering clamping device degree of automation is high, through the direction motion of adjusting power part drive toper regulating part along the perpendicular to bottom plate, makes every locating component homoenergetic and treat the machined part butt, is applicable to the different types and treats the machined part, and clamping component can press from both sides tightly and treat the machined part, and school dress time shortens, and school dress efficiency improves.

Description

Self-centering clamping device

Technical Field

The utility model relates to a clamping technical field especially relates to a from centering clamping device.

Background

The inner gear ring part in the planetary transmission gear box is an annular part, the appearance is regular, but the size and the specification of the part are more in variety, a plurality of tool fixtures with different specifications are often needed in the machining process, and the conventional tool fixtures comprise a plurality of parts such as a pressure plate, an equal-height block and a bottom plate. Specifically, when the inner gear ring is processed in a vertical boring and milling center, the inner gear ring is horizontally placed, the cyclotomic circle or the inner and outer rabbets of the end face hole of the vertical boring and milling center need to be concentric with the pitch circle of the tooth part of the inner gear ring, but the specifications and types of the tooth part of the inner gear ring are more, the inner gear ring has straight teeth and inclined teeth, the inclined teeth also have various types including spiral angles, tooth part pressure angles and modulus, the inner gear ring can only be corrected by a pitch circle rod manually to adapt to various types of inner gear rings, and generally, at least four points of uniform distribution need to be corrected, so that the assembly and calibration are long in assembly and calibration and.

SUMMERY OF THE UTILITY MODEL

Based on it is above, an object of the utility model is to provide a from centering clamping device, long and dress school inefficiency problem during the dress school that has solved prior art existence.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a self-centering clamping device comprising: a base plate; the adjusting assembly is arranged on the bottom plate and comprises a conical adjusting piece and an adjusting power piece, the conical adjusting piece is arranged at the output end of the adjusting power piece, and the adjusting power piece can drive the conical adjusting piece to move along the direction vertical to the bottom plate; the positioning assemblies are arranged on the bottom plate in a sliding mode along the radial direction and the circumferential direction of the conical adjusting piece, the length of each positioning assembly along the radial direction can be adjusted, one end of each positioning assembly can be abutted against the conical surface of the conical adjusting piece, and the other end of each positioning assembly can be abutted against the inner wall of a to-be-machined piece; and the clamping assembly is slidably arranged on the bottom plate and can clamp the workpiece to be machined.

As a preferred scheme of the self-centering clamping device, the positioning assembly comprises a contact element, an elastic element, a support element, a sliding seat and a pitch ball element which are sequentially connected, the sliding seat is slidably connected with the bottom plate, the contact element can be abutted against the conical surface, and the pitch ball element can be abutted against the inner wall of the workpiece to be machined when the elastic element is compressed.

As a preferred scheme from centering clamping device, from centering clamping device still includes the supporting seat, be equipped with the guide way on the supporting seat, the guide way is followed the circumferencial direction of toper regulating part extends, locating component can follow the guide way slides.

As a preferable scheme of the self-centering clamping device, the self-centering clamping device further comprises a first guide rail, the first guide rail is slidably arranged in the guide groove, the sliding seat is slidably arranged on the first guide rail, and the first guide rail extends along the radial direction.

As a preferred scheme from centering clamping device, support piece fixed set up on the pitch ball spare, from centering clamping device still includes: the first guide seat is fixedly arranged on the first guide rail, a first mounting hole is formed in the first guide seat, the contact element penetrates through the first mounting hole, the contact element is a contact column, and the diameter of the first mounting hole is larger than that of the contact column; the second guide seat is fixedly arranged on the first guide rail, the elastic piece is located between the first guide seat and the second guide seat, a second mounting hole is formed in the second guide seat, the supporting piece penetrates through the second mounting hole, the supporting piece is a supporting column, and the diameter of the second mounting hole is larger than that of the supporting column.

As a preferred scheme from centering clamping device, from centering clamping device includes hand wheel and lead screw, the lead screw with clamping unit threaded connection, the hand wheel sets up the one end of lead screw, the hand wheel can drive the lead screw rotates so that clamping unit follows radial sliding.

As a preferred scheme from centering clamping device, the number of clamping components is at least two, wherein two clamping components set up relatively and be first clamping component and second clamping component respectively, the lead screw includes first lead screw section and second lead screw section, first screw on the first lead screw section with the rotation of second screw on the second lead screw section is opposite just first pitch of first screw is the same with the second pitch of second screw, first clamping component with first lead screw section threaded connection, second clamping component in second lead screw section threaded connection, when rotating the hand wheel first clamping component with second clamping component can be close to each other or keep away from each other's direction motion.

As a preferable aspect of the self-centering clamping device, the self-centering clamping device further includes a second guide rail provided on the bottom plate, the second guide rail extending in the radial direction, and the clamping assembly includes: the supporting block can be arranged on the second guide rail in a sliding mode and is used for placing the workpiece to be machined; one end of the vertical adjusting component is arranged on the supporting block, and the length of the vertical adjusting component along the axis direction of the vertical adjusting component is adjustable; the pressing plate is arranged at the other end of the vertical adjusting assembly and is vertical to the axis direction of the vertical adjusting assembly; the horizontal power piece, the first stiff end setting of horizontal power piece is in on the vertical adjusting part, first expansion end with the clamp plate links to each other, horizontal power piece can drive the clamp plate is followed radial reciprocating motion.

As a preferred scheme of the self-centering clamping device, the clamping assembly further comprises a pressing power part, a second fixed end of the pressing power part is arranged on the supporting block, a second movable end of the pressing power part is connected with the vertical adjusting assembly, and the pressing power part can drive the vertical adjusting assembly and the pressing plate to move upwards or downwards along a direction perpendicular to the bottom plate so that the pressing plate is separated from or abutted to the workpiece to be machined.

As a preferred scheme of the self-centering clamping device, the number of the positioning assemblies is four, the four positioning assemblies are uniformly distributed along the circumferential direction of the conical adjusting piece, the number of the clamping assemblies is four, the four clamping assemblies are uniformly distributed along the circumferential direction of the conical adjusting piece, and each clamping assembly is positioned between the two positioning assemblies.

The utility model has the advantages that: the utility model discloses a from centering clamping device degree of automation is high, when the machined part is treated in the correction, through the direction motion of adjusting power part drive toper regulating part along the perpendicular to bottom plate, makes at least three locating component homoenergetic and treat the machined part butt, can be applicable to the different types and treat the machined part, and clamping component can press from both sides tightly and treat the machined part, has shortened school dress time, has improved the dress school efficiency of treating the machined part, has improved the process velocity of treating the machined part.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic view of a self-centering clamping device according to an embodiment of the present invention;

fig. 2 is a schematic view of an adjusting assembly, a positioning assembly, a supporting seat, a first guide rail, a guide pin, a first guide seat, a second guide seat, a mounting plate, and the like according to an embodiment of the present invention;

fig. 3 is a schematic view of a clamping assembly and a second rail according to an embodiment of the present invention.

In the figure:

1. a base plate;

2. an adjustment assembly; 21. a conical adjustment member; 22. adjusting the power part;

3. a positioning assembly; 31. a contact member; 32. an elastic member; 33. a support member; 34. a pitch sphere member; 35. a sliding seat;

4. a clamping assembly; 41. a support block; 42. a vertical adjustment assembly; 43. pressing a plate; 44. a horizontal power member; 45. compressing the power part;

511. a supporting seat; 5110. a guide groove; 512. a first guide rail; 513. a guide pin; 514. a first guide seat; 515. a second guide seat; 516. mounting a plate; 52. a second guide rail;

61. a hand wheel; 62. a screw rod; 621. a first screw section; 622. a second screw section.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "abutted" are to be construed broadly, e.g., as being either a fixed connection or a detachable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, the present embodiment provides a self-centering clamping device for positioning and clamping a ring gear, that is, the workpiece to be machined is a ring gear. The self-centering clamping device comprises a bottom plate 1 and an adjusting component 2, four locating component 3 and clamping component 4, adjusting component 2 sets up on bottom plate 1, including toper regulating part 21 and regulation power part 22, it is the pneumatic cylinder to adjust power part 22, toper regulating part 21 locates the output of adjusting power part 22, it can drive toper regulating part 21 along the direction motion of perpendicular to bottom plate 1 to adjust power part 22, the direction of perpendicular to bottom plate 1 of this embodiment is vertical direction, four locating component 3 are around the circumference evenly distributed of toper regulating part 21, four locating component 3 all set up on bottom plate 1 along the radial and circumference slidable of toper regulating part 21, the radial length of locating component 3 is adjustable, the conical surface butt of every locating component 3 can with toper regulating part 21, the other end can with wait the inner wall butt of machined part, clamping component 4 sets up on bottom plate 1 slidable and can clamp and wait the machined part. In other embodiments, the adjusting power member 22 is not limited to the hydraulic cylinder of the present embodiment, and may also be an electric push rod, an air cylinder or other linear driving mechanism, which is selected according to the actual requirement.

It should be noted that, in the present embodiment, four positioning assemblies 3 are uniformly distributed along the circumferential direction of the conical adjusting member 21, the number of the clamping assemblies 4 is four, the four clamping assemblies 4 are uniformly distributed along the circumferential direction of the conical adjusting member 21, and each clamping assembly 4 is located between two positioning assemblies 3. In other embodiments, the number of the positioning assemblies 3 is not limited to four in this embodiment, and may also be three or more than four, and the number of the clamping assemblies 4 is not limited to four in this embodiment, and may also be one, two, three or more than four, specifically set according to actual needs.

The self-centering clamping device provided by the embodiment has high automation degree, when workpieces are to be treated by correction, the power part 22 is adjusted to drive the conical adjusting part 21 to move upwards or downwards along the vertical direction, so that the four positioning assemblies 3 can abut against the workpieces to be treated, the self-centering clamping device can be suitable for different types of workpieces to be treated, the clamping assembly 4 can clamp the workpieces to be treated, the correcting time is shortened, the assembling and correcting efficiency of the workpieces to be treated is improved, and the processing speed of the workpieces to be treated is increased.

As shown in fig. 2, the positioning assembly 3 of the present embodiment includes a contact member 31, an elastic member 32, a support member 33, a sliding seat 35, and a pitch ball member 34, which are connected in sequence, wherein the sliding seat 35 is slidably connected to the bottom plate 1, the contact member 31 can abut against a conical surface, the pitch ball member 34 can abut against an inner wall of a workpiece to be machined, and the pitch ball member 34 can abut against the inner wall of the workpiece to be machined when the elastic member 32 is compressed. The contact 31 of the embodiment is a semi-sphere at one end abutting against the conical surface, which can reduce the friction between the contact 31 and the conical surface, and ensure that the contact 31 can smoothly slide along the conical surface when the conical adjusting member 21 moves in the vertical direction. The support piece 33 of this embodiment is the telescopic link, and the length of telescopic link can be adjusted according to actual need for the locating component 3 of this embodiment can fix a position the machined part of treating of different diameters, and this telescopic link belongs to prior art, and concrete accessible purchases the acquisition outward, and here is no longer repeated. In other embodiments, in order to adapt the total length of the positioning assembly 3 to workpieces to be processed with different sizes, the positioning assembly 3 matched with the size of the workpiece to be processed can be replaced integrally, and the length of the positioning assembly 3 is selected according to the size of the workpiece to be processed.

As shown in fig. 2, the self-centering clamping device of this embodiment further includes a supporting seat 511, a guiding groove 5110 is provided on the supporting seat 511, the guiding groove 5110 extends along the circumferential direction of the tapered adjusting member 21, and the positioning assembly 3 can slide along the guiding groove 5110, so that the spherical joint ball 34 can abut against the bottom of the groove of the workpiece to be machined. As shown in fig. 2, the self-centering clamping device of this embodiment further includes a first guide rail 512, a mounting plate 516, and a guide pin 513, where the first guide rail 512 is fixedly disposed on the mounting plate 516, one end of the mounting plate 516 is sleeved on the tapered adjusting member 21 to ensure that the mounting plate 516 can rotate around an intersection point of a central axis of the tapered adjusting member 21 and the mounting plate 516, the first guide rail 512 and the mounting plate 516 are slidably disposed in the guide groove 5110, the sliding seat 35 is slidably disposed on the first guide rail 512, the first guide rail 512 extends in a radial direction, one end of the guide pin 513 is fixedly disposed on the mounting plate 516, and the other end of the guide pin can slide along the guide groove 5110.

As shown in fig. 2, the self-centering clamping device further comprises a first guide seat 514, a second guide seat 515 and a second guide rail 52, wherein the second guide rail 52 is arranged on the base plate 1, the clamping assembly 4 is slidably arranged on the second guide rail 52, and the second guide rail 52 extends in a radial direction. The first guide holder 514 is fixedly arranged on the mounting plate 516, a first mounting hole (not shown in the figure) is formed in the first guide holder 514, the contact piece 31 penetrates through the first mounting hole to be arranged, the contact piece 31 is a contact column, the diameter of the first mounting hole is larger than that of the contact column, the second guide holder 515 is fixedly arranged on the mounting plate 516, the elastic piece 32 is located between the first guide holder 514 and the second guide holder 515, a second mounting hole (not shown in the figure) is formed in the second guide holder 515, the supporting piece 33 penetrates through the second mounting hole to be arranged, the supporting piece 33 is a supporting column, and the diameter of the second mounting hole is larger than that of the supporting column.

Specifically, the adjusting power member 22 drives the conical adjusting member 21 to move downward in the vertical direction, the contact member 31 presses the elastic member 32 radially outward, the elastic member 32 is compressed, the positioning assembly 3 moves outward along the length direction of the first guide rail 512 until the pitch ball 34 abuts against the inner wall of the tooth space of the workpiece to be machined, the pitch ball 34 slides along the side wall of the tooth space toward the bottom wall of the tooth space, the positioning assembly 3 slides along the guide groove 5110, at this time, the contact member 31 rotates at an angle in the circumferential direction relative to the first mounting hole, the support member 33 rotates at the same angle in the circumferential direction relative to the second mounting hole, and one end of the pitch ball 34 abutting against the workpiece to be machined abuts against the bottom wall of the tooth space of the workpiece to be machined.

The one end that the pitch sphere piece 34 of this embodiment can be waited to add the work piece butt is the hemisphere, and this kind of structure can make pitch sphere piece 34 along waiting to add the tooth wall motion of work piece to the bottom wall of tooth's socket, guarantees that pitch sphere piece 34 can adapt to the ring gear of different helix angles. Of course, in other embodiments, the end of the pitch ball that can abut against the workpiece to be machined may also be a circle or another shape with a smooth surface, and is specifically provided according to actual needs.

As shown in fig. 1, the self-centering clamping device of this embodiment includes a hand wheel 61 and a screw rod 62, the screw rod 62 is in threaded connection with the clamping assembly 4, the hand wheel 61 is disposed at one end of the screw rod 62, and the hand wheel 61 can drive the screw rod 62 to rotate so as to enable the clamping assembly 4 to slide along the second guide rail 52. Specifically, when the hand wheel 61 is shaken, the screw rod 62 rotates, and the rotation of the screw rod 62 can be converted into the linear motion of the clamping assembly 4 along the length direction of the second guide rail 52, so that the clamping assembly 4 slides along the second guide rail 52, and the clamping assembly 4 is initially moved to a proper position.

The two clamping assemblies 4 of this embodiment are disposed oppositely and are a first clamping assembly and a second clamping assembly respectively, the screw 62 includes a first screw rod section 621 and a second screw rod section 622, the turning directions of a first thread on the first screw rod section 621 and a second thread on the second screw rod section 622 are opposite, and a first pitch of the first thread is the same as a second pitch of the second thread, the first clamping assembly is in threaded connection with the first screw rod section 621, the second clamping assembly is in threaded connection with the second screw rod section 622, and the first clamping assembly and the second clamping assembly can move toward directions close to each other or away from each other when the hand wheel 61 is rotated.

Specifically, the first and second threads have opposite rotation directions, so that the first and second clamping assemblies can move in opposite directions, thereby ensuring that the first and second clamping assemblies simultaneously move toward a direction close to the tapered adjusting member 21 or away from the tapered adjusting member 21, and realizing simultaneous adjustment of the first and second clamping assemblies. The first thread pitch of the first thread is the same as the second thread pitch of the second thread, so that the first clamping assembly and the second clamping assembly can move at the same speed, and synchronous adjustment of the first clamping assembly and the second clamping assembly is realized. The structure of the screw rod 62 of the embodiment is compared with the structure that each clamping component 4 corresponds to one screw rod 62, the operation is simple, the adjustment of the two clamping components 4 can be realized by rotating the hand wheel 61, and in addition, the two clamping components 4 which are arranged oppositely can be ensured to move for the same distance.

As shown in fig. 3, the clamping assembly 4 of the present embodiment includes a supporting block 41, a vertical adjusting assembly 42, a pressing plate 43 and a horizontal power member 44, where the horizontal power member 44 is a hydraulic cylinder, the supporting block 41 is slidably disposed on the second guide rail 52, the supporting block 41 is used for placing a workpiece to be processed, one end of the vertical adjusting assembly 42 is disposed on the supporting block 41, the length of the vertical adjusting assembly 42 along its own axis direction is adjustable, the pressing plate 43 is disposed at the other end of the vertical adjusting assembly 42, the distance between the pressing plate 43 and the supporting block 41 can be adjusted by adjusting the height of the vertical adjusting assembly 42 to adapt to workpieces to be processed with different heights, a first fixed end of the horizontal power member 44 is disposed on the vertical adjusting assembly 42, and a first movable end is connected to the pressing plate 43, and the horizontal power member 44 can drive the pressing.

Specifically, the vertical adjusting part 42 of this embodiment includes fixing base and vertical pole, is equipped with the internal thread on the fixing base, be equipped with on the vertical pole with interior screw-in fit's external screw thread, realize the change to vertical adjusting part 42's height through the length of adjusting vertical pole screw in fixing base. In other embodiments, the vertical adjustment assembly 42 may also be a hydraulic cylinder, an electric push rod, an air cylinder or other linear driving mechanism, and the horizontal power member 44 is not limited to the hydraulic cylinder of this embodiment, but may also be an electric push rod, an air cylinder or other linear driving mechanism, which is selected according to the actual requirement.

It should be noted that each clamping assembly 4 of the present embodiment includes two vertical adjusting assemblies 42, the two vertical adjusting assemblies 42 are arranged in parallel, and the two additional vertical adjusting assemblies 42 can ensure that the pressing plate 43 is always in a horizontal state. Specifically, the upper end of one of the vertical adjustment assemblies 42 is slidably coupled to the bottom of the pressure plate 43, and the upper end of the vertical adjustment assembly 42 is slidably coupled to the pressure plate 43 when the horizontal power member 44 drives the pressure plate 43 to reciprocate in the radial direction. The pressing plate 43 is provided with a strip-shaped hole, the upper end of the other vertical adjusting assembly 42 is arranged through the strip-shaped hole, and when the horizontal power piece 44 drives the pressing plate 43 to reciprocate along the radial direction, the output end of the vertical adjusting assembly 42 reciprocates in the strip-shaped hole relative to the pressing plate 43.

Further, as shown in fig. 3, the clamping assembly 4 of the present embodiment includes a pressing power component 45, the pressing power component 45 is a hydraulic cylinder, a second fixed end of the pressing power component 45 is disposed on the supporting block 41, a second movable end of the pressing power component is connected to the fixed seat, and the pressing power component 45 can drive the vertical adjusting assembly 42 and the pressing plate 43 to move upward or downward along the vertical direction so as to separate or abut the pressing plate 43 from or against the workpiece to be processed. Specifically, compared with the vertical adjusting assembly 42, the pressing power member 45 of the present embodiment has higher motion precision of the pressing power member 45, and can enable the pressing plate 43 to abut against the workpiece to be processed, so that the pressing plate 43 presses the workpiece to be processed, and the pressure of the workpiece to be processed by the pressing plate 43 is maintained within a preset range, thereby not only avoiding the occurrence of the phenomenon that the clamping of the pressing plate 43 to the workpiece is not tight due to the too small pressure of the workpiece to be processed by the pressing plate 43, but also avoiding the occurrence of the phenomenon that the workpiece to be processed is damaged by the pressing plate 43 due to the too large pressure of the workpiece. In other embodiments, the pressing power component 45 is not limited to the hydraulic cylinder of the present embodiment, and may also be an electric push rod, an air cylinder or other linear driving mechanism, which is specifically selected according to actual needs.

Preferably, the self-centering clamping device of this embodiment further includes a controller (not shown in the figure), the controller is electrically connected to the adjusting power member 22, the horizontal power member 44 and the pressing power member 45, the controller may be a centralized or distributed controller, for example, the controller may be an individual single-chip microcomputer or may be formed by a plurality of distributed single-chip microcomputers, and a control program may be run in the single-chip microcomputers to further control the adjusting power member 22, the horizontal power member 44 and the pressing power member 45 to implement the functions thereof.

Further, the self-centering clamping device of the embodiment further comprises a hydraulic station, and the hydraulic station is respectively connected with the adjusting power part 22, the horizontal power part 44 and the pressing power part 45.

In the prior art, when the workpiece to be machined is clamped and the machined workpiece to be machined is taken down from the self-centering clamping device, manual operation is mostly adopted, and the labor intensity of operators is increased. The horizontal power part 44, the pressing power part 45 and the controller which are additionally arranged on the clamping assembly 4 of the embodiment realize automatic clamping of the workpiece to be machined and separation of the machined workpiece to be machined from the clamping assembly 4, so that the labor intensity of workers is reduced, and automatic operation of the self-centering clamping device is realized.

Specifically, the working process of the self-centering clamping device of the embodiment is as follows:

firstly, preliminarily adjusting the position of a pressing assembly on a second guide rail 52 through a hand wheel 61 and a screw rod 62 according to the diameter of a workpiece to be machined;

secondly, adjusting the height of the vertical adjusting assembly 42 to enable the distance between the pressing plate 43 and the supporting block 41 to be within a preset distance range, and adjusting the length of the supporting piece 33 to enable one end, which is in contact with a workpiece to be machined, of the pitch ball piece 34 to reach within a preset position range, wherein the elastic piece 32 has a certain amount of compression deformation, namely a certain pre-tightening force is formed between the contact piece 31 and the conical adjusting piece 21;

step three, placing the workpiece to be machined on the supporting blocks 41 of the four clamping components 4;

fourthly, the power adjusting part 22 is adjusted to drive the conical adjusting part 21 to move downwards along the vertical direction, the contact part 31 extrudes the elastic part 32 outwards along the radial direction, the elastic part 32 is compressed, the positioning component 3 moves outwards along the length direction of the first guide rail 512 until the pitch ball part 34 abuts against the inner wall of the meshing tooth of the workpiece to be machined, the pitch ball part 34 slides along the side wall of the meshing tooth towards the direction close to the bottom wall of the tooth socket, namely the positioning component 3 slides along the guide groove 5110, and one end, abutted against the workpiece to be machined, of the pitch ball part 34 abuts against the bottom wall of the tooth socket of the workpiece to be machined;

step five, driving the pressing plate 43 to move in the horizontal direction by the horizontal power part 44, so that one end, abutted against the workpiece to be processed, of the pressing plate 43 can move to the position right above the workpiece to be processed;

sixthly, the pressing power part 45 drives the driving pressing plate 43 to move downwards in the vertical direction, so that the pressing plate 43 presses the workpiece to be processed, and meanwhile, the adjusting power part 22 is locked, so that the position of the conical adjusting part 21 in the vertical direction is unchanged;

step seven, processing a workpiece to be processed;

step eight, after the processing of the workpiece to be processed is finished, the pressing power part 45 drives the driving pressing plate 43 to move upwards in the vertical direction, so that the pressing plate 43 is separated from the processed workpiece to be processed;

step nine, the horizontal power part 44 drives the pressing plate 43 to move in the horizontal direction, so that one end, abutted against the workpiece to be processed, of the pressing plate 43 can move towards the direction away from the processed workpiece to be processed;

step ten, releasing the locking of the adjusting power part 22, enabling the adjusting power part 22 to drive the conical adjusting part 21 to move upwards along the vertical direction, enabling the elastic part 32 to push the contact part 31 to be always abutted against the conical surface of the conical adjusting part 21, and enabling the adjusting spherical part 34 to be gradually separated from the processed workpiece to be processed;

and step eleven, moving the processed workpiece to be processed to the next station to process the workpiece to be processed in the next step.

Of course, in other embodiments of the present invention, the working process of the self-centering clamping device is not limited to this limitation of this embodiment, and may be adjusted for other steps according to actual needs.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A self-centering clamping device, comprising:

a base plate (1);

the adjusting assembly (2) is arranged on the bottom plate (1) and comprises a conical adjusting piece (21) and an adjusting power piece (22), the conical adjusting piece (21) is arranged at the output end of the adjusting power piece (22), and the adjusting power piece (22) can drive the conical adjusting piece (21) to move in the direction perpendicular to the bottom plate (1);

the positioning assemblies (3) are distributed around the circumference of the conical adjusting piece (21), the positioning assemblies (3) are slidably arranged on the bottom plate (1) along the radial direction and the circumference of the conical adjusting piece (21), the length of the positioning assemblies (3) along the radial direction is adjustable, one end of each positioning assembly (3) can be abutted against the conical surface of the conical adjusting piece (21), and the other end of each positioning assembly can be abutted against the inner wall of a workpiece to be machined;

the clamping assembly (4) is arranged on the bottom plate (1) in a sliding mode and can clamp the workpiece to be machined.

2. The self-centering clamping device according to claim 1, wherein the positioning assembly (3) comprises a contact member (31), an elastic member (32), a support member (33), a sliding seat (35) and a pitch ball member (34) which are connected in sequence, the sliding seat (35) is connected with the bottom plate (1) in a sliding manner, the contact member (31) can be abutted against the conical surface, and the pitch ball member (34) can be abutted against the inner wall of the workpiece to be machined when the elastic member (32) is compressed.

3. The self-centering clamping device as claimed in claim 2, further comprising a support base (511), wherein a guide groove (5110) is formed in the support base (511), the guide groove (5110) extends along the circumferential direction of the conical adjusting member (21), and the positioning assembly (3) can slide along the guide groove (5110).

4. The self-centering clamp of claim 3, further comprising a first guide rail (512), said first guide rail (512) slidably disposed within said guide groove (5110), said sliding seat (35) slidably disposed on said first guide rail (512), said first guide rail (512) extending in said radial direction.

5. The self-centering clamp according to claim 4, wherein said support member (33) is fixedly disposed on said pitch sphere (34), said self-centering clamp further comprising:

the first guide seat (514) is fixedly arranged on the first guide rail (512), a first mounting hole is formed in the first guide seat (514), the contact element (31) penetrates through the first mounting hole, the contact element (31) is a contact column, and the diameter of the first mounting hole is larger than that of the contact column;

second guide holder (515), fixed setting is in on first guide rail (512), elastic component (32) are located first guide holder (514) with between second guide holder (515), be equipped with the second mounting hole on second guide holder (515), support piece (33) run through the setting of second mounting hole, support piece (33) are the support column, the diameter of second mounting hole is greater than the diameter of support column.

6. The self-centering clamping device as recited in claim 1, wherein the self-centering clamping device comprises a hand wheel (61) and a lead screw (62), the lead screw (62) is in threaded connection with the clamping assembly (4), the hand wheel (61) is arranged at one end of the lead screw (62), and the hand wheel (61) can drive the lead screw (62) to rotate so as to enable the clamping assembly (4) to slide along the radial direction.

7. The self-centering clamping device according to claim 6, wherein the number of said clamping assemblies (4) is at least two, wherein the two clamping components (4) are oppositely arranged and are respectively a first clamping component and a second clamping component, the screw (62) comprises a first screw section (621) and a second screw section (622), the first thread on the first screw rod section (621) and the second thread on the second screw rod section (622) have opposite directions of rotation and the first pitch of the first thread is the same as the second pitch of the second thread, the first clamping assembly is in threaded connection with the first screw rod section (621), the second clamping assembly is in threaded connection with the second screw rod section (622), and the first clamping assembly and the second clamping assembly can move towards directions close to each other or away from each other when the hand wheel (61) is rotated.

8. The self-centering clamp device according to claim 1, further comprising a second guide rail (52) provided on said base plate (1), said second guide rail (52) extending in said radial direction, said clamp assembly (4) comprising:

the supporting block (41) is slidably arranged on the second guide rail (52), and the supporting block (41) is used for placing the workpiece to be machined;

a vertical adjusting assembly (42), wherein one end of the vertical adjusting assembly (42) is arranged on the supporting block (41), and the length of the vertical adjusting assembly (42) along the axis direction of the vertical adjusting assembly is adjustable;

the pressing plate (43) is arranged at the other end of the vertical adjusting assembly (42), and the pressing plate (43) is perpendicular to the axial direction of the vertical adjusting assembly (42);

horizontal power spare (44), the first stiff end setting of horizontal power spare (44) is in vertical adjusting part (42) is last, first loose end with clamp plate (43) link to each other, horizontal power spare (44) can drive clamp plate (43) are followed radial reciprocating motion.

9. The self-centering clamping device according to claim 8, wherein the clamping assembly (4) further comprises a pressing power member (45), a second fixed end of the pressing power member (45) is arranged on the supporting block (41), a second movable end of the pressing power member is connected with the vertical adjusting assembly (42), and the pressing power member (45) can drive the vertical adjusting assembly (42) and the pressing plate (43) to move along a direction perpendicular to the bottom plate (1) so as to enable the pressing plate (43) to abut against the workpiece to be machined.

10. The self-centering clamping device according to claim 1, wherein the number of the positioning assemblies (3) is four, four positioning assemblies (3) are uniformly distributed along the circumferential direction of the conical adjusting member (21), the number of the clamping assemblies (4) is four, four clamping assemblies (4) are uniformly distributed along the circumferential direction of the conical adjusting member (21), and each clamping assembly (4) is located between two positioning assemblies (3).