CN219818929U - Pneumatic clamp for aviation thin-wall part - Google Patents

Abstract

A pneumatic clamp for aviation thin-wall parts comprises a T-shaped groove workbench, a lower shell with an adjustable position on the T-shaped groove workbench, an upper shell fixed on the lower shell, and a positioning pin detachably connected with a clamping workpiece; the lower shell and the upper shell form a cavity, and the locating pin is inserted into or pulled out of the top surface of the cavity; the cavity is internally provided with a plurality of spheres uniformly distributed on the circumference of the positioning pin, a supporting disc for supporting the spheres and an elastic part respectively; the radial inner side of the chassis of the lower shell is provided with a circle of inner bulges, the whole supporting disc is annular, and the supporting disc is coaxially overlapped on the top surface of the inner bulges; the inner bulge surrounds the elastic part, and the elastic part is abutted between the positioning pin and the chassis; a circle of groove is formed in the circumferential direction of the positioning pin, and the driving part can drive the sphere to be close to or far away from the groove so as to lock or unlock the positioning pin. The utility model discloses a locating pin form fixed shell class spare, the locate position is nimble, firm.

Description

Pneumatic clamp for aviation thin-wall part

Technical Field

The utility model relates to a anchor clamps field that thin shell class part used, especially a pneumatic clamp for aviation thin wall spare.

Background

Currently, with the development of the industry in China, the flexibility and the high efficiency of the clamp are very high. In the past, chucks have been relatively common clamping devices for machine tools that utilize radial movement of movable jaws, but are prone to workpiece clamping distortion and may present clamp interference requiring multiple clamping. For a workpiece with a complex shape, the chuck is difficult to realize effective fixation of the workpiece, different clamping modes or special clamps are required to be used for manufacturing, a large number of clamps are designed to cause huge clamp preparation workload, more manpower and a long period are occupied, and when a product is remodeled, the clamps are redesigned and manufactured, so that the clamp is not flexible enough to bring a large burden to a processing enterprise.

Therefore, it is necessary to design a fixture for aviation thin-wall parts, which is capable of reducing clamping deformation and flexible in layout, so as to solve the technical problems.

Disclosure of Invention

The utility model aims at providing a clamping position is nimble, be suitable for aviation thin wall spare, do not use anchor clamps such as chuck to press from both sides clamp work piece circumference.

In order to achieve the above object, the present utility model provides the following technical solutions:

the pneumatic clamp for the aviation thin-wall part comprises a T-shaped groove workbench, a lower shell with an adjustable fixing position on the T-shaped groove workbench, an upper shell coaxially fixed on the top surface of the lower shell, and a positioning pin detachably connected with a clamping workpiece;

the lower shell and the upper shell form a cavity with an inserting hole on the top surface, and the inserting hole is formed in the axis of the upper shell for inserting or extracting the locating pin into or from the cavity;

the cavity is internally provided with a plurality of spheres uniformly distributed on the circumference of the positioning pin, a supporting disc for supporting the spheres and an elastic part for elastically supporting the positioning pin; the pneumatic clamp further comprises a driving component for driving the ball to move;

the inner side of the bottom disc of the lower shell is provided with a circle of inner bulges, the whole supporting disc is annular, and the supporting disc is coaxially overlapped on the top surface of the inner bulges;

the protrusion surrounds the elastic component, and the elastic component is abutted between the locating pin and the chassis;

the positioning pins move along the radial direction of the supporting disc, and the top surface of the supporting disc is an inclined surface which inclines outwards and downwards;

a circle of groove is formed in the circumferential direction of the positioning pin, and the driving part can push the ball body to move to the groove so as to lock the inserted positioning pin;

the driving part can release the ball body to unlock the positioning pin, and simultaneously the ball body moves to the radial outer side of the supporting disc under the action of the top surface of the supporting disc.

In the technical scheme, the utility model provides a pair of aviation is pneumatic clamp for thin-walled spare has following beneficial effect:

the positioning pin and the clamping workpiece are fixed by using common mechanical bolts and other connecting pieces, and then the positioning pin is inserted into the T-shaped groove workbench. The position of the locating pin for installing the clamping workpiece and the position of the locating pin on the T-shaped groove workbench can be flexibly and doubly changed according to actual requirements. The traditional clamping method for clamping the circumference of the workpiece is not adopted, the volume of the clamp is effectively reduced, and the requirement on the shape of the mounting clamp for clamping the workpiece is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of the front view of a pneumatic clamp of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the pneumatic clamp of the present disclosure in operation;

FIG. 3 is a schematic view of the structure of the disclosed locating pin;

FIG. 4 is a schematic perspective view of a pneumatic clamp of the present disclosure;

FIG. 5 is a schematic view of the structure of the lower housing of the present disclosure;

FIG. 6 is a schematic view of the structure of the support plate of the present disclosure;

FIG. 7 is a schematic cross-sectional view of the pneumatic clamp of the present disclosure when not in operation;

FIG. 8 is a schematic view of the structure of the upper housing of the present disclosure;

fig. 9 is a schematic structural view of a self-locking slide plate disclosed in the present utility model.

Reference numerals:

the device comprises a workbench 1, a lower shell 2, an upper shell 3, a locating pin 4, a sphere 5, a support disc 6, a self-locking slide disc 7, a disc spring 9 and a nut 10;

an inner protrusion 21 and an outer protrusion 22;

the insertion hole 31, the third circular ring 33, the fourth circular ring 34, the cavity step surface 35, the annular cavity 36 and the air pressure socket 37;

a groove 41 and an outer chamfer 42;

a partition 61;

the inclined surface 71, the first circular ring 72, the second circular ring 73 and the slide plate step surface 74;

a follower spring 81 and a follower plug 82.

Detailed Description

In order to make the person skilled in the art better understand the technical solutions of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings.

As shown in figures 1-9, the pneumatic clamp for the aviation thin-wall part comprises a T-shaped groove workbench 1, a lower shell 2 with an adjustable fixing position on the T-shaped groove workbench 1, an upper shell 3 coaxially fixed on the top surface of the lower shell 2, and a positioning pin 4 detachably connected with a clamping workpiece.

Wherein, T type groove workstation 1 has a plurality of T type grooves, and lower casing 2 is fixed on T type groove workstation 1 through the bolt that matches with T type groove.

The lower housing 2 and the upper housing 3 form a cavity with an insertion hole 31 on the top surface, and the axis of the upper housing 3 is provided with the insertion hole 31 for inserting or extracting the positioning pin 4. The lower shell 2 is provided with a chassis which is attached to the T-shaped groove workbench 1, and two circles of bulges which are coaxial with the positioning pin 4 are vertically fixed on the chassis, namely an inner bulge 21 at the radial inner side and an outer bulge 22 at the radial outer side. The top surface of the upper shell 3 is a disc, and the radial outer side of the disc is vertically fixed and is provided with two circles of bulges in parallel to form a step surface with high inside and short outside. The corresponding position shape of the upper shell 3 is matched with the outer bulge 22, so that the lower shell 2 and the upper shell 3 are spliced seamlessly, namely the step surface is just buckled on the outer bulge 22. Wherein the radially inner high projection of the upper housing 3 is provided as a third ring 33. The outer bulge 22 is attached to the outer part of the third circular ring 33, and the lower shell 2 and the upper shell 3 form a seal, so that dust is not easy to fall off. The lower housing 2 and the upper housing 3 are facilitated to form a cavity.

The inside of the cavity is provided with a plurality of spheres 5 uniformly distributed on the circumference of the locating pin 4, a supporting disc 6 for supporting the spheres 5 and an elastic component for elastically supporting the locating pin 4.

Wherein a sphere 5 for locking the positioning pin is located on a support disc 6 surrounding the inserted positioning pin 4. The ball 5 moves along the radial direction of the supporting disc 6, a circle of grooves 41 are formed in the circumferential direction of the positioning pins 4, and the inserted positioning pins 4 can be locked when the ball 5 is clamped into the grooves 41.

Wherein the supporting plate 6 is annular as a whole, and the supporting plate 6 is coaxially superposed on the top surface of the inner protrusion 21; the top surface of the support disc 6 is an inclined surface which is inclined outwards and downwards, so that the ball body moves outwards in a default state. When the locating pin 4 is inserted into the cavity, the bottom of the locating pin 4 is placed in the supporting plate 6.

Preferably, the outer surface of the support plate 6 is thick and thin. The top surface of the thick ring is provided with a plurality of partitions 61 arranged in the radial direction of the support disk 6 in the length direction, and the balls 5 are placed in the passages formed by the adjacent partitions 61. Each sphere 5 moves in a corresponding channel, being able to move closer to or further from the locating pin at the same time. The partition 61 is beneficial to uniform distribution of the spheres and uniform clamping of the middle part of the positioning pin.

Wherein the inner protrusion 21 forms a space for surrounding the elastic member, which abuts between the positioning pin 4 and the chassis. The elastic component comprises a follower spring 81 and a follower plug 82, wherein the follower spring 81 supports the follower plug 82, and the follower plug 82 coaxially contacts with the bottom surface of the positioning pin 4; when the positioning pin 4 is pulled out, the follower plug 82 closes the insertion hole 31 by the follower spring 81. The design of the follower plug 82 helps prevent dust or chips from the machining process from entering the cavity; in addition, the positioning pin 4 is supported, so that the positioning pin 4 can be slowly inserted into or pulled out. The follower plug 82 can descend with the entry of the dowel pin and ascend with the exit of the dowel pin.

Wherein, the pneumatic clamp also comprises a driving component for driving the sphere 5 to move; the driving part can push the sphere to move to the positioning pin 4 to the groove 41 to lock the positioning pin, and the driving part can drive the sphere 5 away from the groove 41 to unlock the positioning pin 4, and simultaneously the sphere 5 moves to the radial outer side of the support disc 6 under the action of the top surface of the support disc 6. The spheres 5 are preferably stainless steel pellets.

Preferably, the driving part comprises a self-locking slide plate 7, a disc spring 9 sleeved outside the inner bulge 21 and the supporting plate 6 and an up-and-down moving mechanism for driving the self-locking slide plate 7 to move up and down;

the annular self-locking sliding plate 7 slides up and down in a slideway formed by the outer edge of the supporting plate 6 and the inner wall of the cavity, and an inclined plane 71 is arranged on the radial inner side of the top surface of the self-locking sliding plate 7;

in the initial state, the inner wall surface of the self-locking slide plate 7 is positioned below the top surface of the support plate 6, that is, the up-down moving mechanism presses the self-locking slide plate 7 downwards so that the ball 5 is far away from the groove 41 to facilitate the insertion of the positioning pin. Then the self-locking slide plate 7 moves upwards under the action of the disc-shaped spring 9, and the disc-shaped spring 9 elastically supports the self-locking slide plate 7 to enable the ball 5 to be clamped between the groove 41 and the inner wall surface of the self-locking slide plate 7; the up-and-down moving mechanism is used for realizing the downward linear motion of the self-locking slide plate 7, and the up-and-down moving mechanism can refer to a linear motion mechanism, such as a hydraulic cylinder, an electric push rod and other telescopic rods with adjustable lengths. The free end of the telescopic rod is fixedly connected with the self-locking sliding plate 7, and the fixed end of the telescopic rod is fixed on the outer part of the lower shell or the upper shell. The inclined surface 71 is used for gradually reducing the distance between the radial inner side of the self-locking slide plate 7 and the ball body in the process of moving the self-locking slide plate 7 upwards. The ball is driven upward by the inclined surface 71 in the direction of the positioning pin, and gradually transits to the inner wall surface locking ball of the self-locking slide plate 7.

When a complex workpiece needs to be machined, a plurality of bolt holes which can be matched with the positioning pins are directly designed on the outer side of the workpiece. And the aviation thin-wall part is flexibly moved to a working position by using a pneumatic clamp, a hexagon head bolt and a hexagon nut are matched and fixedly installed, and a pneumatic system is installed. Compared with the existing clamp, the preparation work before machining and clamping is greatly reduced, and the actual production efficiency of the machine tool is improved.

Preferably, the outer surface of the self-locking slide plate 7 is thin and thick from top to bottom, and comprises a first circular ring 72 and a second circular ring 73 in sequence from top to bottom, so that the outer surface of the self-locking slide plate 7 forms a concave slide plate step surface 74;

the inner wall surface of the cavity is thin and thick from top to bottom, and comprises a third circular ring 33 and a fourth circular ring 34 in sequence, so that the inner wall surface of the cavity forms a cavity step surface 35 which is convex downwards and matched with the slide plate step surface 74; wherein a fourth ring 34 may be provided on the outer bulge 22 of the lower housing 2.

When the self-locking slide plate 7 moves up and down, the first circular ring 72 slides by being respectively attached to the third circular ring 33 and the thick circular ring of the supporting plate, the second circular ring 73 slides by being attached to the fourth circular ring 34, and the first circular ring 72, the second circular ring 73, the third circular ring 33 and the fourth circular ring 34 form an annular cavity 36; i.e. the rectangular cross-section of the annular chamber 36, results from the chamber step surface 35 and the slide plate step surface 74, respectively. Preferably, the third ring 33 is spaced from the top surface of the support disc by a distance less than the diameter of the sphere, preventing the sphere from falling. The pneumatic clamp for the aviation thin-wall part is compact in design, and compared with the existing clamp, the pneumatic clamp for the aviation thin-wall part shortens the moving range of the steel ball, reduces impact and avoids clamping.

Preferably, the up-and-down moving mechanism is a pressure device for loading the annular chamber 36 with air pressure, and the upper housing 3 is provided with an air pressure socket 37 for communicating with an external pressure device. The pressure device is used for filling or releasing gas to control the motion of the self-locking slide plate.

When the pneumatic fixture is used, the pneumatic fixture for the aviation thin-wall part is matched and fixed with the T-shaped groove workbench through the hexagon head bolt and the nut 10. As shown in fig. 7, the pressure device firstly pressurizes the self-locking slide plate 7, and the self-locking slide plate 7 moves downwards, so that the inclined plane 71 of the self-locking slide plate 7 is far away from the sphere, and the sphere is also far away from the groove 41; then inserting the positioning pin 4; the pressure device slowly relieves the pressure, the self-locking slide 7 moves upwards to the state of fig. 2 under the support of the disc spring, and the inclined surface 71 pushes the sphere to slowly approach the groove 41 until the sphere is clamped between the inner wall surface of the self-locking slide 7 and the groove 41. The self-locking slide plate automatically locks the stainless steel ball body, the positioning pin is clamped by one side of the stainless steel ball body so as to be unable to move, and the other side of the positioning pin is used for connecting the processed or assembled parts; the self-locking slide plate moves up to the contact of the cavity step surface 35 and the slide plate step surface 74, and the state of the locking positioning pin is maintained; the pressure device firstly pressurizes the self-locking slide plate 7, the self-locking slide plate 7 moves downwards, and the positioning pin 4 is pulled out. The pneumatic clamp for the aviation thin-wall part is flexibly fixed with the T-shaped groove workbench through the hexagon head bolt and the hexagon head nut, and the preparation work before machining and clamping is greatly reduced.

Working principle: when clamping complex workpieces, the layout and placement of the pneumatic clamp for the aviation thin-wall workpiece are designed according to the shape of the complex workpieces, the pneumatic clamp is integrally moved to a designed position by utilizing the T-shaped groove of the lower shell, and the pneumatic clamp is connected with the T-shaped groove workbench 1 through bolts. The bolt holes which can be matched with the positioning pins 4 are manufactured on the outer side of the machined workpiece, the positioning pins 4 are fixed on the machined workpiece, and the air pressure system is installed, so that the preparation work before clamping is finished, and the flexible layout is beneficial to higher preparation efficiency before clamping.

The schematic processed workpiece is square, four bolt holes capable of being matched with the positioning pins 4 are formed in the outer sides of the periphery of the processed workpiece, the four positioning pins 4 are fixed on the processed workpiece, then the air pressure device is started, at the moment, the air pressure is larger than the elastic force of a disc-shaped spring in the self-locking device, the disc-shaped spring is compressed and contracted by the air pressure, the self-locking sliding disc 9 is in a loosening state, and the sphere moves away from the circle center direction due to the inclination of the supporting disc, so that the positioning pins 4 can be positioned. At this time, the self-locking slide plate, the upper shell 3 and the lower shell 2 form an annular cavity, and the annular cavity is only observed in the state of fig. 7 and is filled with gas. Let inside the pneumatic clamp for the aviation thin-walled part of slowly getting into of locating pin 4 this moment, the joint of locating pin is provided with 8mm wide 45 degrees chamfers, and upper housing 3 has set up 2mm wide 45 degrees chamfers, and both cooperate, so the error within 8mm of skew can be automatic alignment to the joint of locating pin can insert the anchor clamps within the angle of skew 45 degrees.

The air pressure device is closed to withdraw the air, the air in the third cavity is gradually reduced until the air does not exist, the air pressure is smaller than the elastic force of the disc-shaped spring in the self-locking device, and therefore the lower surface of the self-locking sliding disc moves upwards by the elastic force, and the moving range is limited by the height of the disc-shaped spring. Therefore, the self-locking sliding plate automatically locks the ball body, and the whole clamping process is completed at the moment. The utility model discloses better has shortened spheroidal movable range, has reduced the impact and has avoided the card to dun. Thereafter, cutting is performed, and the positioning pin 4 and the upper end surface of the upper case 3 are subjected to 45-degree chamfer fit at the time of cutting. The follower plug can descend with the entry of the positioning pin and ascend with the exit of the positioning pin. The dust and the cuttings entering the clamp body are greatly reduced, and the service life of the clamp is prolonged.

Preferably, the bottom surface of the positioning pin 4 is provided with a circle of outer chamfer 42. The lower end of the locating pin is in a truncated cone shape, so that the locating pin is convenient to insert into the cavity. Errors within 8mm of offset can be automatically aligned and the joint of the locating pin can be inserted into the fixture within 45 degrees of offset. Compared with the existing clamp, the clamp solves the requirement of the clamp level in the actual production environment, and reduces the workload of technicians for aligning the positioning joint with the positioner.

Preferably, the positioning pin 4 and the insertion hole 31 are contacted by a pair of mating chamfers. The locating pin and the top surface of last casing carry out 45 degrees chamfer cooperation during the cutting, have shortened the movable range of steel ball, have reduced the impact and have avoided the card to dun. The middle part of the lower shell is provided with a limiting boss, so that the downward movement of the positioning pin is limited, and the upper shell is provided with a limiting boss, namely a third circular ring, so that the upward movement of the self-locking sliding disc is limited.

Preferably, as shown in fig. 7, the inner wall surface of the second ring 73 of the self-locking slide plate 7 is provided with a groove, so that the inner diameter of the first ring 72 is smaller than that of the second ring 73. The outer surface of the support disc 6 is thick and thin. The self-locking slide 7 and the support disk 6 form a limiting function, and the disc spring is limited by the upper thick part of the outer surface of the support disk 6 and can also be limited by the second circular ring 73. The lower shell, the self-locking sliding disc and the supporting disc are surrounded into an annular space, the annular space is set to be a second cavity, and a disc-shaped spring is placed in the second cavity. The pneumatic clamp for the aviation thin-wall part is provided with the disc-shaped spring, stainless steel pellets can be better fixed by utilizing the pressure change of gas and the elastic strain force of the spring, the tensioning force is improved, and the gas can be flexibly filled and discharged.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the novel claims.

Claims (10)

1. The pneumatic clamp for the aviation thin-wall part is characterized by comprising a T-shaped groove workbench (1), a lower shell (2) with an adjustable fixing position on the T-shaped groove workbench (1), an upper shell (3) coaxially fixed on the top surface of the lower shell (2), and a positioning pin (4) detachably connected with a clamping workpiece;

the lower shell (2) and the upper shell (3) form a cavity with an insertion hole (31) on the top surface, and the insertion hole (31) is formed at the axis of the upper shell (3) for inserting or extracting the positioning pin (4) into or from the cavity;

the cavity is internally provided with a plurality of spheres (5) uniformly distributed on the circumference of the locating pin (4), a supporting disc (6) for supporting the spheres (5) and an elastic part for elastically supporting the locating pin (4); the pneumatic clamp also comprises a driving component for driving the ball body (5) to move;

a circle of inner bulges (21) are arranged on the radial inner side of the chassis of the lower shell (2), the whole supporting disc (6) is annular, and the supporting disc (6) is coaxially overlapped on the top surface of the inner bulges (21);

the inner protrusion (21) surrounds the elastic member, which abuts between the positioning pin (4) and the chassis;

the ball body (5) moves along the radial direction of the supporting disc (6), and the top surface of the supporting disc (6) is an inclined surface which inclines outwards and downwards;

a circle of grooves (41) are formed in the circumferential direction of the positioning pins (4), and the driving part can push the ball body (5) to move to the grooves (41) so as to lock the inserted positioning pins (4);

the driving part can release the ball body (5) to unlock the positioning pin (4), and simultaneously the ball body (5) moves to the radial outer side of the supporting disc (6) under the action of the top surface of the supporting disc (6).

2. The pneumatic clamp for the aviation thin-wall part according to claim 1, wherein the driving part comprises a self-locking sliding disc (7) positioned in the cavity, a disc-shaped spring (9) sleeved outside the inner bulge (21) and an up-and-down moving mechanism for driving the self-locking sliding disc (7) to move up and down;

the annular self-locking sliding plate (7) slides up and down in a slideway formed by the outer edge of the supporting plate (6) and the inner wall of the cavity, and an inclined surface (71) is arranged on the radial inner side of the top surface of the self-locking sliding plate (7);

the up-and-down moving mechanism presses down the self-locking slide disc (7) in an initial state so that the ball body (5) is far away from the groove (41);

after the self-locking slide disc (7) moves upwards, the disc-shaped spring (9) elastically supports the self-locking slide disc (7) to enable the ball body (5) to be clamped between the groove (41) and the inner wall surface of the self-locking slide disc (7).

3. The pneumatic clamp for the aviation thin-wall part according to claim 2, wherein the outer surface of the self-locking sliding disc (7) is thin and thick, and comprises a first circular ring (72) and a second circular ring (73) from top to bottom in sequence, so that the outer surface of the self-locking sliding disc (7) forms a concave sliding disc step surface (74);

the inner wall surface of the cavity is thin and thick, and comprises a third circular ring (33) and a fourth circular ring (34) from top to bottom in sequence, so that the inner wall surface of the cavity forms a cavity step surface (35) which is convex and matched with the sliding disc step surface (74);

when the self-locking sliding disc (7) moves up and down, the first circular ring (72) is attached to the third circular ring (33) to slide, the second circular ring (73) is attached to the fourth circular ring (34) to slide, and the first circular ring (72), the second circular ring (73), the third circular ring (33) and the fourth circular ring (34) form an annular cavity (36).

4. A pneumatic clamp for aviation thin-wall parts according to claim 3, characterized in that the up-down moving mechanism is a pressure device capable of loading the annular cavity (36) with air pressure, and the upper shell (3) is provided with an air pressure socket (37) for communicating with an external pressure device.

5. The pneumatic clamp for aviation thin-wall parts according to claim 1, characterized in that the bottom surface of the positioning pin (4) is provided with a circle of outer chamfer (42).

6. Pneumatic clamp for aviation thin-walled parts according to claim 1 characterized in that the locating pin (4) and the insertion hole (31) are contacted by a pair of mating chamfers.

7. The air jig for an aviation thin-walled member according to claim 1, wherein the elastic member comprises a follower spring (81) and a follower plug (82), the follower spring (81) supporting the follower plug (82), the follower plug (82) contacting the bottom surface of the positioning pin (4);

when the positioning pin (4) is pulled out, the follower plug (82) closes the insertion hole (31) under the action of the follower spring (81).

8. The pneumatic clamp for the aviation thin-walled workpiece according to claim 1, characterized in that a circle of outer protrusions (22) are arranged on the radial outer side of the chassis of the lower shell (2), and the corresponding position shape of the upper shell (3) is matched with the outer protrusions (22) so that the lower shell (2) and the upper shell (3) are spliced seamlessly.

9. Pneumatic clamp for aviation thin-walled parts according to claim 1 characterized in that the top surface of the support disc (6) is provided with a plurality of partitions (61) arranged in the radial direction of the support disc (6), the spheres (5) being placed in the channels formed by adjacent partitions (61).

10. The pneumatic clamp for aviation thin-walled parts according to claim 1, characterized in that the outer surface of the supporting disc (6) is thick and thin.