CN215847086U - Clamping mechanism for processing flatness of thin-wall part - Google Patents

Abstract

The utility model relates to the technical field of thin-wall part processing equipment, and particularly discloses a clamping mechanism for processing the flatness of a thin-wall part, which comprises a supporting seat and a pull rod connected to the supporting seat in a sliding manner, wherein a plurality of pressing mechanisms arranged along the circumferential direction of the pull rod are connected to the supporting seat in a rotating manner, and a clamping gap for clamping the thin-wall part is arranged between each pressing mechanism and the supporting seat; a linkage mechanism for driving the pressing mechanism to slide and rotate relative to the supporting seat along with the sliding of the pull rod is arranged between the pull rod and the pressing mechanism. When the pull rod pulls the pressing mechanism to be close to or far away from the supporting seat, the friction plate pressing plate can be clamped and fixed or released, and the pressing mechanism can rotate, so that the friction plate pressing plate can be conveniently taken and placed, and the problem that the thin-wall part similar to the friction plate pressing plate cannot be accurately and efficiently machined in the prior art is solved.

Description

Clamping mechanism for processing flatness of thin-wall part

Technical Field

The utility model relates to the technical field of thin-wall part machining equipment, in particular to a clamping mechanism for machining the flatness of a thin-wall part.

Background

When processing certain annular thin wall form work piece, the roughness to the machined surface has higher precision requirement, for example when processing the friction disc clamp plate in figure 1, the requirement is waited to have very high precision requirement between machined surface A and the clamp plate bottom surface of processing, at present when processing this type of annular thin wall part, generally can adopt the interior circle of work piece or outer wall to fix for accurate face, but thereby the actual processing result sees, because the thickness of this type of work piece is less and the diameter is great, consequently when this type of work piece is fixed in the centre gripping, the deformation of form such as warpage takes place easily to the work piece atress, cause the product error of processing to be very big. In order to enable a workpiece to be stably and accurately fixed during machining, a whole pressing block is adopted to press and fix the workpiece in the machining process, but in actual operation, the whole pressing block is large in size, so that the structure of the whole clamping mechanism is complex, the equivalent rate of the installed workpiece is low, the occupied space of the whole pressing block is large, the operable space of a cutter for machining the workpiece is limited, the machining difficulty is increased, and therefore the workpiece cannot be accurately, quickly and conveniently clamped and fixed to efficiently finish machining of the annular thin-wall part.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a clamping mechanism for processing the flatness of a thin-wall part, and aims to solve the problems that in the prior art, the thin-wall part similar to a friction plate pressing plate cannot be clamped and fixed accurately, quickly and conveniently, and the workpiece processing cannot be finished efficiently and accurately.

In order to achieve the purpose, the basic technical scheme of the utility model is as follows: a clamping mechanism for processing the flatness of a thin-wall part comprises a supporting seat and a pull rod connected to the supporting seat in a sliding manner, wherein a plurality of pressing mechanisms arranged along the circumferential direction of the pull rod are connected to the supporting seat in a rotating manner, and a clamping gap for clamping the thin-wall part is formed between each pressing mechanism and the supporting seat; a linkage mechanism for driving the pressing mechanism to slide and rotate relative to the supporting seat along with the sliding of the pull rod is arranged between the pull rod and the pressing mechanism.

The principle of the scheme is as follows: according to the thin-wall part clamping device, when the pull rod slides along the supporting seat, the pull rod drives the pressing mechanism to slide relative to the supporting seat and rotate at the same time through the linkage mechanism, when the pull rod drives the pressing mechanism to slide so that the distance between the pressing mechanism and the supporting seat is the minimum, a clamping gap for clamping the thin-wall part is formed between the pressing mechanism and the supporting seat, the thin-wall part can be fixed by the pressing mechanisms in a multi-point position, and therefore the thin-wall part is stably and accurately fixed on the supporting seat, and the thin-wall part is conveniently and accurately machined; meanwhile, when the pull rod drives the pressing mechanism to slide to enable the distance between the pressing mechanism and the supporting seat to be the largest, the pressing mechanism does not play a role in pressing and fixing the thin-wall part any more, and in the process that the distance between the pressing mechanism and the supporting seat is from the smallest to the largest, the linkage mechanism not only drives the pressing mechanism to slide, but also drives the pressing mechanism to rotate at the same time, so that the pressing mechanism rotates from a state capable of pressing and fixing the thin-wall part to a state incapable of blocking the thin-wall part, the thin-wall part to be processed can be conveniently placed on the supporting seat, or the processed thin-wall part can be conveniently taken down from the supporting seat.

The beneficial effect of this scheme lies in:

1. can accurately and stably carry out the centre gripping with thin wall part and fix: compared with the prior art in which the workpiece is clamped and fixed by the outer circle or the inner hole wall of the thin-wall part, the workpiece is easy to deform due to clamping force, and the machining precision is influenced. Through setting up a plurality of pressing means who arranges along pull rod circumference in this application, it is fixed to carry out the multiple spot position push type to the work piece to make the work piece can be fixed in on the supporting seat by stable and accurate, so that accomplish the processing of work piece with high accuracy.

2. The workpiece taking and placing is very convenient: in this application, pressing means can also take place the rotation in the slip in-process except can sliding for the supporting seat, thereby make pressing means slide to when being close to the supporting seat, pressing means can be fixed in the supporting seat with the work piece centre gripping on, and slide to when keeping away from the supporting seat when pressing means, pressing means takes place the rotation under linkage mechanism, thereby make pressing means no longer play to press to the work piece and stop, so that can place the work piece of treating processing on the supporting seat fast, perhaps will process the good work piece fast and take out on by the supporting seat, the operation is very convenient, can effectively practice thrift the time that the work piece is fixed or get, promote the efficiency of work piece processing.

3. The processing cost is low: in this application, utilize the pull rod can a plurality of pressing means of simultaneous drive motion, avoid using every pressing means of a plurality of actuating mechanism individual drives for fixture's structure can be simplified, and cost reduction utilizes a plurality of pressing means of pull rod drive simultaneously, a plurality of pressing means synchronous motion of being convenient for, make a plurality of pressing means can press simultaneously or release the work piece, and control is simple, convenient operation.

Furthermore, the pressing mechanism comprises a pressing rod and a pressing block fixedly connected to the pressing rod, and the pressing rod is connected to the supporting seat in a sliding mode and is connected with the linkage mechanism in a rotating mode.

Preferably, in this embodiment, the pressing rod is slidably connected to the supporting seat, and when the pulling rod slides relative to the supporting seat, the pulling rod drives the pressing rod to slide synchronously relative to the supporting seat through the linkage mechanism, and meanwhile, the pressing rod is rotatably connected to the linkage mechanism, and when the linkage mechanism moves relative to the supporting seat, the pressing rod is driven to rotate, so that the pressing rod is rotated fast to a state where the fixed workpiece can be pressed or the workpiece can be released.

Further, the linkage mechanism comprises a fixed plate and a guide unit, the fixed plate is connected to the pull rod, and a rotary clamping groove matched with the pressing rod is formed in the fixed plate; when the fixed plate moves along with the pull rod, the guide unit drives the pressing rod to synchronously rotate.

Preferably, in this scheme, the fixed plate is connected on the pull rod, will stimulate fixed plate synchronous movement when the pull rod slides for the supporting seat for the fixed plate can drive through rotatory draw-in groove and press the depression bar to slide along the supporting seat, and the internal diameter of rotatory draw-in groove is greater than the diameter of depression bar simultaneously, makes the depression bar rotate for the fixed plate, so that the guide unit can drive and press the synchronous emergence rotation of depression bar.

Furthermore, the guide unit comprises a guide pin fixedly connected to the support seat, and a driving groove matched with the guide pin is formed in the side wall of the pressing rod.

Preferably, in this aspect, the guide pin is fixedly connected to the support base, and when the pressing lever slides relative to the support base, the guide pin and the driving groove cooperate with each other to facilitate control of the pressing lever to rotate synchronously when sliding along the support base.

Furthermore, the driving groove comprises a rotary driving section and linear driving sections respectively communicated with two ends of the rotary driving section.

Preferably, in this scheme, when the guide pin cooperates with the rotary driving section, the rotary driving section drives the pressing rod to rotate, and when the guide pin cooperates with the linear driving sections at the two ends of the rotary driving section, the pressing rod only slides along the supporting seat without rotating, so that the pressing block does not rotate any more when approaching the workpiece, and the surface of the workpiece is prevented from being abraded due to relative friction between the pressing block and the workpiece.

Further, both ends of the rotary driving section are provided with linear driving sections.

As the preferred, all set up sharp drive section in two sections of rotary drive section in this scheme for can both follow one section distance of vertical direction translation after taking place to rotate according to the depression bar, thereby make according to the briquetting and can remove the great distance apart from the supporting seat top surface, thereby can get more conveniently and put and treat processing friction disc clamp plate.

Furthermore, a fixing groove matched with the guide pin is formed in the supporting seat, a pressing plate is fixedly connected to the supporting seat, and a fixing gap used for fixing the guide pin is formed between the pressing plate and the supporting seat.

Preferably, in this aspect, the guide pin is press-fixed to the fixing groove by the pressing plate, so that the position of the guide pin is stable and the guide pin can be easily replaced when worn.

Furthermore, a pressing groove matched with the guide pin is arranged on the pressing plate.

As the preferred, in this scheme, through set up on the clamp plate with uide pin complex laminating groove for clamp plate and supporting seat can be connected steadily, can fix the uide pin firmly simultaneously, reduce the uide pin and take place to rotate and the condition of wearing and tearing with fixed plate cooperation in-process, make the uide pin can play the effect of accurate direction for a long time.

Furthermore, a first movable gap is arranged between the pressing rod and the fixing plate, a second movable gap is arranged between the fixing plate and the pull rod, and the fixing plate is provided with a component force unit which is used for averagely acting the pulling force of the pull rod on each pressing block.

Preferably, in the scheme, a first movable gap is arranged between the pressing rod and the fixed plate, the pressing rod can slightly shift relative to the fixed plate through the first movable gap, and similarly, a second movable gap enables a slight shift to occur between the pull rod and the fixed rod in the connection process, so that when the workpiece per se has a certain warping deformation, the pressing blocks firstly contacting with the workpiece can firstly receive the reaction force of the workpiece in the contact process of the plurality of pressing blocks and the workpiece, so that the pressing rod firstly generates the action of the force with the fixed plate, the fixed plate can deflect towards the direction far away from the pressing rod firstly contacting with the workpiece, and therefore under the deflection action of the fixed plate, the rest pressing blocks can quickly contact with the workpiece to apply the force to fix the workpiece, and the situation that when the workpiece is clamped and fixed, part of the pressing blocks are not contacted with the workpiece to play a clamping effect is avoided, in the scheme, the component force unit is arranged, so that all the pressing blocks can be in contact with the workpiece to press and fix the workpiece, and the machining precision is ensured.

Furthermore, the component force unit comprises a movable spherical surface arranged on one side of the fixed plate facing the pressing block, and a matching spherical surface matched with the movable spherical surface is arranged on the pull rod.

Preferably, through the matching of the movable spherical surface and the matching spherical surface, when the pull rod pushes the fixed plate, the driving force can be transmitted to the fixed plate, so that the fixed plate can drive the pressing rod and the pressing blocks to move to clamp and fix the workpiece, and the movable spherical surface can be matched with the matching spherical surface, when the workpiece to be processed is in a warped and uneven state, and the plurality of pressing blocks are close to the workpiece to press and fix the workpiece, part of the pressing blocks are firstly contacted with the warped part of the workpiece, so that the pressing blocks firstly contacted with the workpiece move upwards through the corresponding pressing rods, and the corresponding pressing rods pull the positions of the fixed plate and the pressing rods to move upwards, and due to the arrangement of the movable spherical surface on the fixed plate, the fixed plate slides relative to the matching spherical surface on the pull rod, so that the fixed plate rotates to an inclined state from an original horizontal state, and the high end of the fixed plate after rotating is the pressing rod position for pulling the fixed plate to move, and the low end of the fixed plate can play a role in pushing the other pressing rods downwards, and the fixed plate does not deflect and move relative to the pull rod until the pulling force action of all the pressing rods on the fixed plate is equal, so that the pulling force on each pressing rod is equal, and the pressing force of each pressing block on a workpiece is equal.

Drawings

FIG. 1 is a schematic view of a prior art friction plate pressure plate.

Fig. 2 is a schematic view of a clamping mechanism for processing flatness of a thin-walled part according to an embodiment of the present invention.

Fig. 3 is a front cross-sectional view of fig. 2 taken along the central axis of the tie rod.

Fig. 4 is a schematic view illustrating the connection between the fixing plate and the pressing rod according to the first embodiment of the present invention.

Fig. 5 is a schematic view illustrating a connection between a guide pin and a middle seat according to an embodiment of the present invention.

FIG. 6 is a front cross-sectional view of a second embodiment of the present invention taken along the central axis of the drawbar.

Fig. 7 is a partial enlarged view of a portion a in fig. 6.

Fig. 8 is a partial enlarged view of fig. 6 at B.

Fig. 9 is a schematic view of a fixing plate according to a second embodiment of the utility model.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the friction plate pressing plate comprises a friction plate pressing plate 1, a supporting seat 2, an upper seat 201, a middle seat 202, a lower seat 203, a pull rod 3, a sleeve 4, a limiting block 5, a pressing rod 6, a pressing block 7, a fixing plate 8, a threaded sleeve 9, a limiting sleeve 10, a rotary clamping groove 11, a guide pin 12, a pressing plate 13, a driving groove 14, a rotary driving section 1401, a linear driving section 1402, a first movable gap 15, a second movable gap 16, a movable spherical surface 17 and a matched spherical surface 18.

Example one

As shown in fig. 1, for a friction lining pressing plate 1 in the prior art, for a product of the friction lining pressing plate 1, it is necessary to make a parallelism between a surface a and a bottom surface of the friction lining pressing plate 1 with a higher precision, in a processing stage, the bottom surface of the friction lining pressing plate 1 is processed first, then the friction lining pressing plate 1 is fixed by using the bottom surface of the friction lining pressing plate 1 as a reference surface, and finally the surface a is processed. Since the friction lining press plate 1 has a small thickness and a large diameter, when the friction lining press plate 1 is fixed, the friction lining press plate 1 needs to be prevented from bending deformation, and the friction lining press plate 1 needs to be stably fixed, so as to ensure the parallelism requirement between the processed surface a and the bottom surface of the friction lining press plate 1.

An embodiment substantially as shown in figures 2 and 3: the utility model provides a fixture is used in processing of thin wall part plane degree, a thin wall part of face in for processing is similar to friction disc clamp plate 1 in fig. 1, including supporting seat 2 and vertical sliding connection pull rod 3 on supporting seat 2, in this embodiment, supporting seat 2 includes by from last upper seat 201 that loops through screw fixed connection in proper order down, well seat 202 and lower seat 203, it is fixed to make things convenient for the installation of pull rod 3, it is equipped with sleeve 4 to overlap at the outer coaxial cover of pull rod 3, sleeve 4 sliding connection is in upper seat 201, screw fixed connection has stopper 5 on sleeve 4's top, open stopper 5's bottom has the spacing groove, the top integrated into one piece of pull rod 3 has the head end, the bottom surface that the head end is located the spacing groove and the head end offsets with sleeve 4's top surface, the top surface of head end offsets with the diapire of spacing groove, make pull rod 3 be fixed in on sleeve 4.

With reference to fig. 2, 3 and 4, the upper seat 201 and the middle seat 202 are vertically and slidably connected with a plurality of pressing mechanisms which are uniformly arranged along the circumferential direction of the pull rod 3, each pressing mechanism comprises a pressing rod 6 and a pressing block 7, the pressing rod 6 is vertically arranged, the pressing block 7 is fixedly connected to the top end of the pressing rod 6 through a screw, and a clamping gap for pressing the fixed friction plate pressing plate 1 can be formed between the bottom surface of the pressing block 7 and the top surface of the upper seat 201.

Be equipped with between sleeve 4 and the pressure depression bar 6 and be used for the drive to press the depression bar 6 along with 3 vertical slip of pull rod and the link gear of 2 vertical slip and rotations of relative supporting seat, in this embodiment, link gear includes fixed plate 8 and guide unit, the mode that the screw thread rigid coupling was passed through to the bottom of sleeve 4 is fixed with thread bush 9, be provided with the ladder face on sleeve 4's the outer wall, make sleeve 4 top diameter be greater than the bottom diameter, and sleeve 4 outer wall is close to the bottom cover and is equipped with stop collar 10, the bottom surface of stop collar 10 and the top surface contact of thread bush 9, the top surface of stop collar 10 and the bottom surface contact of fixed plate 8, the ladder face contact on fixed plate 8's the top surface and the sleeve 4 outer wall, make fixed plate 8 can follow the vertical slip of pull rod 3 and vertical migration.

With reference to fig. 3 and 4, the fixing plate 8 is provided with a vertical rotary slot 11 penetrating through the fixing plate 8, the side wall of the pressing rod 6 is provided with a matching section with a diameter equal to that of the rotary slot 11, the diameter of the matching section is smaller than that of the pressing rod 6, and when the fixing plate 8 vertically slides, the vertical plate can pull the pressing rod 6 to vertically move. In this embodiment, the guide unit includes the uide pin 12 that is fixed in on well seat 202, combine fig. 3 and fig. 5, the top surface of seat 201 is opened there is the standing groove, there is clamp plate 13 through screw fixedly connected with in the standing groove, it has the laminating groove with uide pin 12 outer wall arcwall face complex to open on the bottom surface of clamp plate 13, and it has the fixed slot with uide pin 12 outer wall arcwall face cooperation to open on the diapire of standing groove, the fixed slot encloses into the fixed clearance that is used for fixed uide pin 12 with the laminating groove jointly, and adopt this kind of fixed mode, only need place the uide pin in the fixed slot, then be fixed in on well seat 202 with clamp plate 13, can be fixed in the uide pin 12 between fixed slot and the laminating groove fast, and after uide pin 12 weares and teares, can conveniently change uide pin 12.

As shown in fig. 4, a driving groove 14 matched with the guide pin 12 in fig. 4 is provided on a side wall of the pressing rod 6 near the bottom, in this embodiment, the driving groove 14 includes a rotation driving section 1401 and a linear driving section 1402 communicated with upper and lower ends of the rotation driving section 1401, and with reference to fig. 3, one end of the guide pin 12 near the pressing rod 6 is inserted into the driving groove 14, when the pressing rod 6 moves vertically along with the fixing plate 8, under the guiding action of the guide pin 12 and the rotation driving section 1401, the pressing rod 6 can rotate along its central axis, so that the pressing rod 6 drives the pressing block 7 to rotate.

The specific implementation process is as follows:

when the surface a of the friction plate pressing plate 1 needs to be machined, firstly, a hydraulic rod on the existing machining tool is utilized to upwards push the pull rod 3, so that the pull rod 3 upwards moves to the upper limit position, the pull rod 3 pushes the sleeve 4 and the fixing plate 8 to upwards move together, so that the fixing plate 8 pushes the pressing rod 6 to upwards move, under the matching action of the rotary driving section 1401 and the guide pin 12, the pressing rod 6 can also rotate along the central axis of the pressing rod 6 while upwards moving, when the pressing rod 6 rotates, the pressing rod 6 also drives the pressing block 7 at the top end of the pressing rod 6 to rotate towards the center of the upper seat 201, and at the moment, the friction plate pressing plate 1 to be machined can be placed on the top surface of the upper seat 201.

After the friction plate pressing plate 1 is placed on the top surface of the upper seat 201, the pull rod 3 is pulled downwards, so that the pull rod 3 pulls the sleeve 4 and the fixing plate 8 to move downwards, correspondingly, the fixing plate 8 drives the pressing rod 6 and the pressing block 7 to move downwards synchronously, when the guide pin 12 is matched with the rotary driving section 1401, the pressing rod 6 rotates along the central axis of the pressing rod 6, so that the pressing block 7 rotates to be located above the friction plate pressing plate 1 along with the pressing rod 6, when the guide pin 1401 is matched with the linear driving section 1402 connected with the lower end of the rotary driving section 1401, the pressing block 7 only translates downwards and does not rotate any more, so that the pressing block 7 is prevented from rotating relative to the friction plate pressing plate 1 after contacting with the top surface of the friction plate pressing plate 1, and the friction plate pressing plate 1 is damaged and the pressing block 7 is abraded due to friction. When the pressing block 7 moves downwards to the lower limit position, the bottom surface of the pressing block 7 generates extrusion force on the top surface of the friction plate pressing plate 1, so that the friction plate pressing plate 1 is pressed and fixed on the top surface of the upper seat 201, at the moment, an A surface can be processed on the friction plate pressing plate 1 by using a milling cutter in the prior art, because the number of the pressing blocks 7 is large in the embodiment, the friction plate pressing plate 1 can be stably fixed in the processing process, the deformation of the friction plate pressing plate 1 can be reduced, when the pressing block 7 moves to the upper limit position, the pressing surface of the pressing block 7 rotates to the direction close to the central shaft of the upper seat 201, the pressing block 7 cannot block the friction plate pressing plate 1 in the vertical direction, and the friction plate pressing plate 1 can be conveniently taken and placed.

Example two

The difference between the second embodiment and the first embodiment is that: as shown in fig. 6 and 8, in the present embodiment, a first movable gap 15 is provided between the pressing rod 6 and the fixing plate 8, and with reference to fig. 9, since the rotary slot 11 formed in the fixing plate 8 is communicated with the outer wall of the fixing plate 8, the pressing rod 6 can move left and right in the transverse direction relative to the fixing plate 8 under the gap space of the first movable gap 15; referring to fig. 6 and 7, a second movable gap 16 is provided between the fixed plate 8 and the sleeve 4, and a force component unit for averagely applying the pulling force of the pull rod 3 to each pressing block 7 is provided on the fixed plate 8, in this embodiment, the force component unit includes a movable spherical surface 17 provided on the top surface of the fixed plate 8, and a fitting spherical surface 18 fitted with the movable spherical surface 17 is integrally formed on the stepped surface of the sleeve 4.

In this embodiment, due to the existence of the first movable gap 15 and the second movable gap 16, the fixing plate 8 can move transversely in a direction away from any one of the pressing rods 6, so when the friction plate pressing plate 1 is actually processed, because the thickness of the friction plate pressing plate 1 is thinner, if the friction plate pressing plate 1 warps at a small angle, a small amount of warping occurs in the processing process before the A surface is processed, if the friction plate pressing plate 1 can be well fixed when the surface A is processed, so that the bottom surface of the friction plate pressing plate 1 is fully attached to the top surface of the upper seat 201, then the surface A is processed, even if the friction plate pressing plate 1 still has a small-angle warping after the subsequent pressing of the friction plate pressing plate 1 is removed, the parallelism requirement between the processed A surface and the bottom surface of the friction plate pressing plate 1 can be ensured, so that the friction plate pressing plate 1 is not influenced in the actual use process. Therefore, in this embodiment, when the friction plate pressing plate 1 is fixed on the top surface of the upper seat 201, there is a small-angle warp, when the fixing plate 8 is pulled downward by using a hydraulic rod of an existing processing machine tool, so that the fixing plate 8 pushes the pressing rod 6 to move downward, wherein the pressing block 7 located above the warp of the friction plate pressing plate 1 contacts the friction plate pressing plate 1 before other pressing blocks 7, at this time, the pressing rod 6 corresponding to the pressing block 7 exerts an upward pulling force on the fixing plate 8, so that the fixing plate 8 has a tendency of sliding upward with respect to the sleeve 4, because the matching spherical surface 18 and the movable spherical surface 17 are in a contact state at this time, the movable spherical surface 17 receives a large pressing force toward the corresponding pressing rod 6, and under the reactive supporting force of the matching spherical surface 18 of the sleeve 4 on the movable spherical surface 17 of the fixing plate 8, the fixing plate 8 tends to slide toward the pressing rod 6, this causes the fixing plate 8 to exert a downward pushing force on the other pressing rods 6 except the pressing rod 6, so that the other pressing rods 6 also exert a pressing force on the friction plate presser 1, and only when the acting force of each pressing rod 6 on the fixed plate 8 in the vertical direction is equal, the fixed plate 8 does not have the tendency of horizontal and transverse sliding and tends to be in a balanced state, therefore, through the arrangement of the movable spherical surface 17 and the mating spherical surface 18, and the arrangement of the first movable gap 15 and the second movable gap 16 in the present embodiment, when the fixed friction plate press plate 1 is pressed, even if the friction plate pressing plate 1 is partially warped, the pressing force of each pressing block 7 on the friction plate can be equalized, therefore, the circumferential direction of the friction plate can be pressed and fixed by all the pressing blocks 7, and the stable position of the friction plate pressing plate 1 on the surface A to be processed is ensured, so that the processing is smoothly finished.

The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the utility model has not been set forth herein in any way. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (8)

1. The utility model provides a fixture is used in processing of thin wall part plane degree, includes supporting seat and the pull rod of sliding connection on the supporting seat, its characterized in that: the supporting seat is connected with a plurality of pressing mechanisms which are arranged along the circumferential direction of the pull rod in a sliding manner, and a clamping gap for clamping the thin-wall part is formed between each pressing mechanism and the supporting seat; a linkage mechanism for driving the pressing mechanism to slide relative to the supporting seat along with the sliding of the pull rod and rotate is arranged between the pull rod and the pressing mechanism; the pressing mechanism comprises a pressing rod and a pressing block fixedly connected to the pressing rod, and the pressing rod is connected to the supporting seat in a sliding mode and is connected with the linkage mechanism in a rotating mode; the linkage mechanism comprises a fixed plate and a guide unit, the fixed plate is connected to the pull rod, and a rotary clamping groove matched with the pressing rod is formed in the fixed plate; when the fixed plate moves along with the pull rod, the guide unit drives the pressing rod to synchronously rotate.

2. The clamping mechanism for processing the flatness of the thin-wall part according to claim 1, characterized in that: the guide unit comprises a guide pin fixedly connected to the supporting seat, and a driving groove matched with the guide pin is formed in the side wall of the pressing rod.

3. The clamping mechanism for processing the flatness of the thin-wall part as claimed in claim 2, wherein: the driving groove comprises a rotary driving section and linear driving sections respectively communicated with one end of the rotary driving section.

4. The clamping mechanism for processing the flatness of the thin-wall part as claimed in claim 3, wherein: and linear driving sections are arranged at two ends of the rotary driving section.

5. The clamping mechanism for processing the flatness of the thin-wall part according to any one of claims 2 to 4, characterized in that: the supporting seat is provided with a fixing groove matched with the guide pin, the supporting seat is fixedly connected with a pressing plate, and a fixing gap for fixing the guide pin is arranged between the pressing plate and the supporting seat.

6. The clamping mechanism for processing the flatness of the thin-wall part as claimed in claim 5, wherein: and a pressing groove matched with the guide pin is arranged on the pressing plate.

7. The clamping mechanism for processing the flatness of the thin-wall part according to claim 1, characterized in that: a first movable gap is arranged between the pressing rod and the fixing plate, a second movable gap is arranged between the fixing plate and the pull rod, and a component force unit used for enabling the pull rod to averagely act on each pressing block is arranged on the fixing plate.

8. The clamping mechanism for processing the flatness of the thin-wall part as claimed in claim 7, wherein: the component force unit comprises a movable spherical surface arranged on one side of the fixed plate facing the pressing block, and a matching spherical surface matched with the movable spherical surface is arranged on the pull rod.

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