CN218363404U - Clamping equipment - Google Patents

Abstract

The application belongs to the technical field of casting, and provides clamping equipment for clamping a cylindrical workpiece, wherein the clamping equipment comprises a rotating seat and a supporting frame, the rotating seat comprises a rotating table and a driving device, and the driving device drives the rotating table to turn over up and down; the support frame is used for being sleeved in a through hole of a workpiece and is fixed on the rotary table; the rotary table is provided with a plurality of fixtures and a plurality of working holes, the fixtures are arranged around the periphery of the support frame, the fixtures are used for fixing the end face structure of the workpiece, and the working holes are used for a machining tool to stretch into the workpiece for machining. This application is with the clamping difficulty of solving prior art to the tube-shape work piece, can't transform processing position, leads to the technical problem that production efficiency is low.

Description

Clamping equipment

Technical Field

The application belongs to the technical field of casting, and particularly relates to clamping equipment.

Background

In the production process of the motor casing of the new energy automobile, as shown in fig. 1 and 2, the motor casing of the new energy automobile is of a cylindrical structure, a through hole is formed in the middle of the motor casing, and hole sites, textures and other concave-convex structures which are formed by casting are formed on the surface of the periphery of the motor casing. According to production requirements, the motor shell is required to be arranged on a processing machine tool, and two end face structures of the motor shell are processed through automatic tools.

However, since the motor casing is of a cylindrical structure, the hollow through hole is not supported by a hard body, and the texture and the concave-convex structure on the circumferential surface cannot be damaged, the clamping difficulty is increased. The clamping mode adopted at present is that a fixed clamp is arranged on a platform to clamp a hard part of the end face of a workpiece, a machining tool moves to the workpiece, and an upward end face structure of the workpiece is machined; and after one end face structure of the workpiece is machined, unloading the workpiece, overturning the workpiece and re-clamping the workpiece to enable the other end face structure of the workpiece to face upwards, and finishing the rest machining. Therefore, the whole operation is very complicated, the motor shell has large volume, the overturning is difficult, and the production efficiency is low; moreover, the periphery of the motor casing is not supported by the hollow through hole of the motor casing, so that the motor casing is easy to damage under the action of external force, and the processing yield is low.

Disclosure of Invention

An object of the embodiment of the application is to provide a clamping device, so that the technical problem that in the prior art, the cylindrical workpiece is difficult to clamp, the machined part cannot be changed, and the production efficiency is low is solved.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the clamping equipment is used for clamping a cylindrical workpiece and comprises:

the rotary seat comprises a rotary table and a driving device, and the driving device drives the rotary table to turn up and down;

the support frame is sleeved in the through hole of the workpiece and fixed on the rotary table;

the rotary table is provided with a plurality of fixtures and a plurality of working holes, the fixtures are arranged around the periphery of the support frame, the fixtures are used for fixing the end face structure of the workpiece, and the working holes are used for a machining tool to stretch into the workpiece for machining.

The application provides a clamping equipment's beneficial effect lies in: compared with the prior art, the clamping equipment mainly comprises a rotating seat, and a rotating table for clamping workpieces is arranged on the rotating seat. Driven by the driving device, the rotary table can be turned over up and down to switch the machining position of the workpiece.

To the clamping problem of tube-shape work piece, including the support frame on the clamping equipment of this application, this support frame sets up and supplies the work piece suit on foretell revolving stage. The inner wall of the workpiece is supported by the support frame from the hollow through hole of the workpiece, so that the annular wall of the workpiece is prevented from being easily subjected to concave embedding or damage due to the action of external force in the machining process. The turntable is provided with a clamp and a working hole, so that the upper end face structure and the lower end face structure of the workpiece sleeved on the support frame are fixed by the clamp in order to avoid damaging the structure of the circumferential surface of the workpiece. The working hole on the rotary table corresponds to a part needing to be machined on the lower end face structure of the workpiece, and after the rotary table is turned over up and down, the machining tool can extend into the lower end face structure of the workpiece from the upward working hole. Therefore, in practical application, the workpiece is clamped on the equipment at one time, and the processing operation of the two end surface structures of the workpiece can be completed. In the machining process, the rotary base can drive the rotary table to turn over up and down to switch the upper end face and the lower end face of the workpiece, so that the machining part of the workpiece is accurately positioned, and the production efficiency is effectively improved.

The structure of the supporting frame is improved, the supporting frame sequentially comprises a top disc, a support and a base which are connected from top to bottom, a plurality of abutting blocks for supporting the inner wall of a workpiece are arranged on the base, and the plurality of abutting blocks are annularly arranged on the base and extend outwards. Therefore, the abutting block is used for supporting the inner wall of the periphery of the workpiece from the hollow through hole of the workpiece, the external force effect is effectively counteracted, and the fixing effect on the workpiece is further improved. Wherein, the top disc is arranged on the top of the supporting frame to prevent the interference on the movement of the processing cutter.

Optionally, the abutting block includes an abutting portion and an installation portion, and an arc-shaped surface is arranged on the periphery of the abutting portion; the base is provided with an installation guide rail, and the installation part of the abutting block is fixed on the installation guide rail. On the one hand, have the arcwall face on propping the conflict portion periphery of kicking block to cooperate with the through-hole inner wall profile of work piece, improve the support stability to the work piece. On the other hand, the mounting part of the abutting block is fixed on the mounting guide rail of the base, so that the abutting block can be linearly inserted into the support frame, the angle of the abutting block extending outwards from the middle shaft of the base is favorably limited, and the positioning effect is effectively improved.

Optionally, the height of the support frame vertically arranged on the rotary table is not greater than the length between two end faces of the workpiece. Therefore, when the workpiece is sleeved on the support frame through the hollow through hole, the support frame cannot protrude out of the upward end face of the workpiece, the movement of the machining tool is prevented from being hindered, and the tool falling range of the machining tool is effectively ensured.

The structure of a clamp on the rotary table is improved, the clamp comprises an upper clamping piece and a lower clamping piece, and the lower clamping piece and a working hole on the rotary table are arranged in a staggered mode; the rotary table is provided with support columns, the number of the support columns is the same as that of the upper clamping pieces, and the upper clamping pieces are arranged on the rotary table through the support columns. On one hand, the lower end face structure position of the corresponding workpiece on the rotary table is provided with the working hole, so that the lower clamping piece and the working hole on the rotary table are arranged in a staggered mode to avoid mutual interference. On the other hand, the upper clamping piece is arranged on the rotary table through the support column, and the upper clamping piece is erected above the rotary table so as to extend to the upper end face structure of the workpiece sleeved on the support frame and fix the upper end face structure of the workpiece.

Optionally, the upper clamping piece comprises an upper clamping buckle, an upper positioning piece and a limiting piece, the upper clamping buckle fastens the upper end face structure of the workpiece from the upper part, the upper positioning piece is connected to the upper end face structure of the workpiece in a penetrating manner, and the limiting piece is abutted to the periphery of the workpiece. Therefore, the upper clamping buckle is fastened to the upper end face structure of the workpiece from the upper part, and the upper positioning piece is abutted to and fixedly connected with the upper end face structure of the workpiece from the lower part, so that an upper and lower fixing structure is formed, and the fixing effect of the upper end face structure of the workpiece is improved. The limiting piece supports against the circumferential wall of the workpiece from the side part so as to limit the position of the workpiece and improve the limiting effect.

Optionally, the upper end face structure of the workpiece comprises an outwardly extending protrusion having a through hole therein; the upper positioning piece comprises a positioning seat and an insertion rod, the positioning seat abuts against a bulge on the workpiece from the lower part, and the insertion rod extends upwards from the positioning seat and is inserted into a through hole in the bulge. Therefore, the positioning seat in the upper positioning piece supports the bulge on the workpiece from the lower part, and the insertion rod on the positioning seat is inserted into the through hole of the bulge, so that the positioning effect is improved, and the clamping and fool-proofing effects are achieved.

Optionally, the lower end face structure of the workpiece comprises a lug extending outwards and a hole groove on the workpiece; the lower clamping piece comprises a lower clamping buckle and a lower positioning piece, the lower clamping buckle is buckled with a lug on the workpiece, and the lower positioning piece corresponds to the hole groove on the workpiece so as to be mutually fixed in an inserting mode. Therefore, the lower clamping buckle and the lower positioning piece also play a role in fixing the lower end face structure of the workpiece up and down, the lower clamping buckle fastens the outwards extending lug on the workpiece, and the lower positioning piece corresponds to the hole groove at the lower end of the workpiece in position and is abutted and fixed.

Optionally, the lower positioning element includes a supporting seat and an insertion block, and the insertion block extends upward from the supporting seat and is inserted into the hole slot of the workpiece. The lower end face structure of the workpiece is propped against the bottom of the supporting seat so as to be matched with the lower clamping buckle up and down to fix the lower end face structure of the workpiece. Because the supporting seat corresponds to the hole groove on the workpiece, the insert block on the supporting seat can be smoothly inserted into the hole groove of the workpiece, thereby improving the positioning effect and playing the role of clamping and fool-proofing,

the structure of the rotary seat is improved, the rotary seat comprises a driving end and a driven end, the rotating shaft is connected to the two sides of the rotary table, and the driving device is arranged on the driving end. Therefore, the rotary seat consists of a driving end and a driven end, and the driving end and the driven end are respectively connected with the rotary table rotating shaft from two sides, so that the support stability of the rotary table is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic perspective view of a workpiece according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of a workpiece according to an embodiment of the present disclosure;

fig. 3 is a schematic perspective view of a first clamping device provided with a workpiece according to an embodiment of the present application;

fig. 4 is a schematic perspective view of a first clamping device according to an embodiment of the present application;

fig. 5 is a schematic view of an overturning state of an upper rotating table of the clamping device according to the embodiment of the application;

fig. 6 is a schematic view of an explosive structure of a support frame according to an embodiment of the present disclosure;

fig. 7 is a cross-sectional structural view of a workpiece mounted on a turntable according to an embodiment of the present application;

fig. 8 is a schematic perspective view of a second clamping device according to an embodiment of the present application;

fig. 9 is a schematic perspective view of a second clamping device provided with a workpiece according to an embodiment of the present application;

FIG. 10 is an enlarged view of the portion C of FIG. 9;

FIG. 11 is an enlarged view of the portion B of FIG. 8;

FIG. 12 is an enlarged view of part A of FIG. 3;

fig. 13 is a schematic perspective view of a lower positioning element according to an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

100-a workpiece; 101-a bump; 102-piercing; 103-a bump; 104-hole slot;

200-a clamp;

1-a rotating base; 10-a drive device; 11-a drive end; 12-a driven end;

2-a support frame; 21-top disk; 22-a scaffold; 221-a strut; 23-a base; 231-mounting the guide rail; 232-card slot; 24-a top-resisting block; 241-interference part; 242-a mounting portion; 243-arc surface;

3, rotating the platform; 31-a working hole; 32-support columns;

4-an upper clamping member; 41-fastening the clip; 42-an upper positioning member; 421-positioning seat; 422-inserting rod; 43-a stop;

5-a lower clamping member; 51-lower clip; 52-lower retainer; 521-a support seat; 522-insert block.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The clamping device provided by the embodiment of the application is explained. In the embodiments of the present application, the processing on the motor casing of the new energy automobile is taken as an example for detailed description.

As shown in fig. 1 and 2, the motor casing of the new energy automobile is a cylindrical structure formed by casting, and has a hollow through hole, and the outer surface of the circumference of the motor casing has hole sites, textures and a concave-convex structure. According to production requirements, the motor shell is required to be fixed on a processing machine tool, and an upper end face structure M and a lower end face structure N of the motor shell are processed through a processing tool.

In the embodiment of the present application, referring to fig. 3, 4 and 5, the clamping device is disposed on a processing machine for clamping the cylindrical workpiece 100. The clamping equipment comprises a rotating seat 1 and a supporting frame 2.

The rotating base 1 comprises a rotary table 3 and a driving device 10, wherein the driving device 10 can drive the rotary table 3 to turn over up and down.

The support frame 2 is fixed to the turntable 3 and is fitted into the through hole of the workpiece 100. It is understood that the workpiece 100 is mounted on the support frame 2 through a hollow through hole in the workpiece 100.

As shown in fig. 4 and 5, the turntable 3 is provided with a plurality of jigs 200 and a plurality of work holes 31 provided around the outer periphery of the support frame 2, and the jigs 200 fix the upper end surface structure M and the lower end surface structure N of the workpiece 100; the working hole 31 of the turntable 3 is used for a machining tool (not shown) to extend into the working hole 31 and machine the workpiece 100 after the turntable 3 is turned upside down.

Compared with the prior art, the clamping equipment provided by the embodiment of the application mainly comprises a rotating seat 1, and a rotary table 3 for clamping the workpiece 100 is arranged on the rotating seat 1. The turntable 3 is turned upside down by the drive of the drive device 10 to switch the machining site of the workpiece 100.

In the processing machine generally used at present, due to the limitation of the movement space, the processing tool is generally moved above the workpiece 100 to perform the cutting. In this case, the turntable 3 is turned upside down by the rotary base 1 of the present invention to change the upward position of the workpiece 100, thereby facilitating the smooth machining of the workpiece 100 by the machining tool.

To the clamping problem of the cylindrical workpiece 100, the clamping device of the present application includes a support frame 2, and the support frame 2 is disposed on the turntable 3 for the workpiece 100 to be sleeved. The inner wall of the workpiece 100 is supported by the support frame 2 from the hollow through hole of the workpiece 100, so that the annular wall of the workpiece 100 is prevented from being easily recessed or damaged due to the action of external force in the machining process.

Wherein, the turntable 3 is provided with a fixture 200 and a working hole 31, so as to avoid damaging the structure of the circumferential surface of the workpiece 100, the fixture 200 is utilized to fix the upper end surface structure M and the lower end surface structure N of the workpiece 100 sleeved on the supporting frame 2. The working hole 31 on the turntable 3 corresponds to a part to be processed on the lower end surface structure N of the workpiece 100, and after the turntable 3 is turned upside down, the processing tool can extend into the lower end surface structure N of the workpiece 100 from the upward working hole 31.

Therefore, in practical applications, the workpiece 100 is clamped on the device at one time, and the processing operation of the two end face structures of the workpiece 100 can be completed. In the machining process, the rotary base 1 can drive the rotary table 3 to turn over up and down to switch the upper end face and the lower end face of the workpiece 100, so that the machining part of the workpiece 100 is accurately positioned, and the production efficiency is effectively improved.

In the embodiment of the present application, referring to fig. 4 and fig. 6, the supporting frame 2 on the turntable 3 sequentially includes a top plate 21, a bracket 22 and a base 23 from top to bottom, and the top plate 21, the bracket 22 and the base 23 are sequentially connected. The base 23 is fixed on the turntable 3, and a plurality of abutting blocks 24 for supporting the inner wall of the workpiece 100 are arranged on the base 23, and the plurality of abutting blocks 24 are annularly arranged on the base 23 and extend outwards. Thus, the abutting block 24 supports the inner wall of the workpiece 100 from the hollow through hole of the workpiece 100, effectively offsetting the external force action, and further improving the fixing effect of the workpiece 100. Wherein a top plate 21 is provided on top of the support frame 2 to prevent interference with the movement of the machining tool.

In this embodiment, as shown in fig. 6, the support 22 is preferably composed of at least three struts 221 provided on the base 23. Wherein, the top plate 21 is connected to each supporting rod 221, and each propping block 24 extends outwards from the space between the adjacent supporting rods 221 to form a supporting structure extending outwards in at least three directions on average, thereby effectively ensuring the supporting effect on the circumference of the workpiece 100.

Referring to fig. 6, the abutting block 24 includes an abutting portion 241 and a mounting portion 242, and an outer periphery of the abutting portion 241 has an arc surface 243 to match with an inner wall profile of the through hole of the workpiece 100, so as to improve a supporting stability of the workpiece 100.

The base 23 is provided with a mounting rail 231, and the mounting portion 242 of the abutting block 24 is fixed to the mounting rail 231. The propping block 24 can be linearly inserted into the supporting frame 2, which is beneficial to limiting the angle of the propping block 24 extending outwards from the central axis of the base 23, and effectively improving the positioning effect.

In this embodiment, as shown in fig. 6, a locking groove 232 is provided in the mounting rail 231, and a screw having a nut can be used to lock in the locking groove 232 and be fixed to the mounting portion 242 of the abutting block 24 in a penetrating manner.

In other embodiments (not shown), the mounting portion 242 of the supporting block 24 may be directly embedded in the mounting rail 231 and then fixed by fasteners such as screws, etc. to achieve the same fixing effect. The fixing manner between the mounting portion 242 of the abutting block 24 and the mounting rail 231 on the base 23 is not particularly limited.

Preferably, as shown in fig. 7, the height L1 of the supporting frame 2 vertically arranged on the turntable 3 is not greater than the length L2 between the two end faces of the workpiece 100. It is understood that the height L1 of the support frame 2 extending upward on the turntable 3 is less than or equal to the length L2 of the through hole of the workpiece 100 when the workpiece 100 is mounted on the support frame 2.

Therefore, when the workpiece 100 is sleeved on the support frame 2 through the hollow through hole, the support frame 2 does not protrude out of the upward end surface of the workpiece 100, so that the movement of the machining tool is prevented from being hindered, and the tool falling range of the machining tool is effectively ensured.

In one embodiment of the present application, referring to fig. 4 and 8, the clamp 200 on the turntable 3 includes an upper clamp 4 and a lower clamp 5. Since the working hole 31 is formed on the turntable 3 at a position corresponding to the lower end surface structure N of the workpiece 100, the lower clamping member 5 and the working hole 31 on the turntable 3 are arranged in a staggered manner to avoid mutual interference.

The turntable 3 is provided with support columns 32 with the same number as the upper clamping pieces 4, and the upper clamping pieces 4 are arranged on the turntable 3 through the support columns 32. The upper clamping member 4 is erected above the turntable 3 so as to extend to the upper end surface structure M of the workpiece 100 sleeved on the supporting frame 2 and fix the upper end surface structure M of the workpiece 100.

Referring to fig. 9 and 10, the upper clamping member 4 includes an upper buckle 41, an upper positioning member 42 and a limiting member 43, the upper buckle 41 fastens the upper end structure M of the workpiece 100 from above, and the upper positioning member 42 is connected to the upper end structure M of the workpiece 100 in a penetrating manner. Therefore, the upper clip 41 is fastened to the upper end surface structure M of the workpiece 100 from above, and the upper positioning element 42 is abutted against and fixed to the upper end surface structure M of the workpiece 100 from below, so as to form an upper and lower fixing structure, thereby improving the fixing effect on the upper end surface structure M of the workpiece 100.

The limiting member 43 abuts against the outer periphery of the workpiece 100, so that the limiting member 43 abuts against and fixes the circumferential wall of the workpiece 100 from the side portion, thereby limiting the position of the workpiece 100 and improving the limiting effect.

In an embodiment of the present application, referring to fig. 1, 10 and 11, the upper end surface structure M of the workpiece 100 includes an outwardly extending protrusion 101, and the protrusion 101 has a through hole 102. Herein, the upper positioning element 42 includes a positioning seat 421 and an insertion rod 422, the positioning seat 421 abuts against the protrusion 101 on the workpiece 100 from below, and the insertion rod 422 extends upward from the positioning seat 421 and is inserted into the through hole 102 on the protrusion 101. Therefore, the positioning seat 421 in the upper positioning member 42 abuts against the protrusion 101 on the workpiece 100 from below, and the insertion rod 422 on the positioning seat 421 is inserted into the through hole 102 of the protrusion 101, so as to improve the positioning effect and play a role in preventing fool in clamping.

In another embodiment of the present application, referring to fig. 2, 10 and 12, the lower end surface structure N of the workpiece 100 includes an outwardly extending protrusion 103 and a slot 104 on the workpiece 100. Herein, the lower clamping member 5 includes a lower clip 51 and a lower positioning member 52, the lower clip 51 is fastened to the protrusion 103 on the workpiece 100, or the lower clip 51 and the lower positioning member 52 vertically clamp the protrusion 103. The lower positioning member 52 is positioned to correspond to the hole 104 of the workpiece 100 so as to be fixed to each other in a plugging manner. Therefore, the lower clip 51 and the lower positioning element 52 also play a role in fixing the lower end surface structure N of the workpiece 100 up and down, the lower clip 51 fastens the outward extending protrusion 103 on the workpiece 100, and the lower positioning element 52 corresponds to and abuts against and is fixed to the hole slot 104 at the lower end of the workpiece 100.

As shown in fig. 13, the lower positioning member 52 includes a supporting base 521 and an insertion block 522, and the insertion block 522 extends upward from the supporting base 521 and is inserted into the hole 104 of the workpiece 100. The lower end surface structure N of the workpiece 100 is supported at the bottom by the supporting seat 521, so as to be vertically matched with the lower clip 51 to fix the lower end surface structure N of the workpiece 100. Because the supporting seat 521 corresponds to the hole slot 104 of the workpiece 100, the insert 522 of the supporting seat 521 can be smoothly inserted into the hole slot 104 of the workpiece 100, thereby improving the positioning effect and playing a role in preventing clamping and fool-proofing,

in the embodiment of the present application, referring to fig. 10, the rotary base 1 includes a driving end 11 and a driven end 12, the driving end 11 and the driven end 12 are connected to both sides of the rotary table 3 through a rotating shaft, and the driving device 10 is disposed on the driving end 11. Therefore, the rotating base 1 consists of a driving end 11 and a driven end 12, and the driving end 11 and the driven end 12 are respectively connected with the rotating shaft of the rotating table 3 from two sides, so that the support stability of the rotating table 3 is effectively improved.

Preferably, the driving device 10 may adopt a stepping motor to improve the control effect. The overturning position of the rotary table 3 is limited, and the positioning effect and the working stability are improved.

In other embodiments (not shown), the rotating base 1 may also be a single body structure, and the rotating base 1 is composed of a base and a rotating mechanism on the base, and the driving device 10 is disposed on the rotating mechanism. Therefore, the size of the whole machine is favorably reduced, and the occupied space is saved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a clamping equipment for carry out the clamping to the work piece of tube-shape, its characterized in that: the clamping equipment comprises:

the rotating seat comprises a rotating table and a driving device, and the driving device drives the rotating table to turn up and down;

the support frame is sleeved in the through hole of the workpiece and fixed on the rotary table;

the rotary table is provided with a plurality of fixtures and a plurality of working holes, the fixtures are arranged around the periphery of the support frame, the fixtures are used for fixing the end face structure of the workpiece, and the working holes are used for a machining tool to stretch into the workpiece for machining.

2. The clamping device of claim 1, wherein: the supporting frame sequentially comprises a top disc, a support and a base which are connected from top to bottom, wherein the base is provided with a plurality of abutting blocks for supporting the inner wall of a workpiece, and the plurality of abutting blocks are annularly arranged on the base and extend outwards.

3. The clamping apparatus of claim 2, wherein: the abutting block comprises an abutting part and an installation part, and the periphery of the abutting part is provided with an arc-shaped surface; the base is provided with an installation guide rail, and the installation part of the abutting block is fixed on the installation guide rail.

4. The clamping apparatus of claim 1, wherein: the supporting frame is vertically arranged on the rotary table, and the height of the supporting frame is not greater than the length between two end faces of the workpiece.

5. The clamping device of claim 1, wherein: the clamp comprises an upper clamping piece and a lower clamping piece, and the lower clamping piece and the working hole on the rotary table are arranged in a staggered mode; the rotary table is provided with support columns, the number of the support columns is the same as that of the upper clamping pieces, and the upper clamping pieces are arranged on the rotary table through the support columns.

6. The clamping device of claim 5, wherein: go up the holder and include the buckle, go up setting element and locating part, go up the buckle and fasten the up end structure of work piece from the top, go up the setting element cross-under in the up end structure of work piece, the locating part offsets with the periphery of work piece.

7. The clamping apparatus of claim 6, wherein: the upper end face structure of the workpiece comprises an outward extending bulge, and the bulge is provided with a through hole; the upper positioning piece comprises a positioning seat and an insertion rod, the positioning seat abuts against a bulge on the workpiece from the lower part, and the insertion rod extends upwards from the positioning seat and is inserted into a through hole in the bulge.

8. The clamping apparatus of claim 5, wherein: the lower end face structure of the workpiece comprises a lug extending outwards and a hole groove on the workpiece; the lower clamping piece comprises a lower clamping buckle and a lower positioning piece, the lower clamping buckle is buckled with the lug on the workpiece, and the lower positioning piece corresponds to the hole groove on the workpiece.

9. The clamping apparatus of claim 8, wherein: the lower positioning piece comprises a supporting seat and an insertion block, wherein the insertion block extends upwards from the supporting seat and is inserted into the hole groove of the workpiece.

10. The clamping device according to any one of claims 1 to 9, wherein: the rotary seat comprises a rotary shaft connected to a driving end and a driven end on two sides of the rotary table, and the driving device is arranged on the driving end.

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