Special-shaped part machining tool clamping mechanism

Abstract

The invention discloses a clamping mechanism of a special-shaped part processing machine tool, belongs to the technical field of machine tool clamps, and aims to solve the problems that when a special-shaped part with requirements on the surface is clamped, a workpiece is easily damaged by a rigid clamp, relative sliding of the workpiece is easily caused when clamping parts are relatively concentrated, and the operation is relatively inconvenient due to the fact that pressure is maintained by manually operating a valve. The device comprises a fixed seat, two vertical plates are fixedly connected to the top surface of the fixed seat, a mounting plate is fixedly connected to the top surfaces of the two vertical plates, a first clamping block is fixedly connected to one side of the top surface of the mounting plate, a sliding groove is formed in the top surface of the mounting plate, and a second clamping block is slidably arranged in the sliding groove. By arranging the driving assembly and the pressure assembly, the contact assembly is kept stable and does not retract after being attached to the special-shaped part, manual operation of an operator is not needed, the effect of switching the contact surface is achieved by arranging the contact pad capable of overturning in a reciprocating mode, the contact area is increased by arranging the expansion part, and the stable clamping effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool fixtures, in particular to a clamping mechanism for a special-shaped part processing machine tool. Background Art

[0002] Special-shaped parts are mainly caused by the fact that the country has not formulated strict standards and specifications, and there are no relevant strict parameter regulations. The enterprises control the customized production of parts on their own. There are many types of special-shaped parts. Due to their relatively irregular shapes, they usually need to be positioned using corresponding clamping mechanisms during machine tool processing.

[0003] After searching, the patent with announcement number CN204430884U is: A fixture for highlight processing of special-shaped workpieces, including a base, a cylinder assembly arranged at one end of the base, a first positioning block fixed to the other end of the base, and a clamping assembly suspended between the cylinder assembly and the first positioning block and movably cooperated with the two, the clamping assembly includes a push block and a second positioning block, one end of the push block is transmission-connected to the cylinder assembly, the other end of the push block is movably connected to the first positioning block, the second positioning block is movably embedded in the push block and is used to cooperate with the first positioning block to clamp the workpiece. The above patent embodiment arranges the cylinder assembly and the first positioning block on the base, and suspends a movable clamping assembly between the cylinder assembly and the first positioning block, so that the fixture can clamp both regular-shaped workpieces and special-shaped workpieces, and the clamping is fast and stable, which improves the processing accuracy and processing efficiency.

[0004] The above patent still has some shortcomings when in use, such as: when clamping special-shaped parts with different surface requirements, the contact mode of the clamping mechanism used is also different. When clamping special-shaped parts with surface requirements, clamping them by rigid clamps is likely to cause scratches on their surfaces and damage the workpieces; when the clamping surface of some special-shaped parts is large or the weight is heavy, the clamping part is relatively concentrated, which is easy to cause relative sliding of the workpiece; currently, some special-shaped parts clamping mechanisms mainly maintain pressure by manually operating valves, so that the contacts remain stable after extending a certain length, which is inconvenient to operate.

[0005] In view of the above problems, a clamping mechanism for special-shaped parts processing machine tools is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a clamping mechanism for a machine tool for processing special-shaped parts. By adopting this device to work, the problem that when clamping special-shaped parts with surface requirements in the above background, it is easy to cause scratches on the surface and damage the workpiece by clamping them with rigid clamps; when the clamping surface of some special-shaped parts is large or the weight is heavy, the clamping part is relatively concentrated, which can easily cause relative sliding of the workpiece; at present, some special-shaped parts clamping mechanisms mainly maintain pressure by manually operating valves to keep the contacts stable after extending a certain length, which is inconvenient to operate.

[0007] The top of the fixing plate is provided with a first locking plate, and the second locking plate is provided with a second locking plate, wherein the locking plate has a first locking plate and a second locking plate. The driving assembly comprises an electric telescopic rod fixedly connected to the side surface of one of the vertical plates, a first guide rod symmetrically fixedly connected between the two vertical plates, and a second guide rod fixedly connected to the inner wall of the slide groove, a connecting block is slidably provided on the side walls of the first guide rod and the second guide rod, the movable end of the electric telescopic rod is fixedly connected to the side wall of the connecting block, two oblique rods are symmetrically fixedly connected to the side wall of the connecting block, and the top surface of the connecting block is fixedly connected to the bottom surface of the second clamping block; The pressure assembly includes two piston cylinders symmetrically fixedly connected to the top surface of the fixed seat, each of the piston cylinders is sealed and slidably connected with a piston, and the side wall of each piston is fixedly connected with a piston rod, and each piston rod is slidably connected to the side wall of the corresponding piston cylinder, and one end of the two piston rods located outside the piston cylinder is respectively fixedly connected to the side walls of the two oblique rods, and one end of each piston cylinder is fixedly connected with a first one-way tube and a second one-way tube, and one end of the two first one-way tubes is respectively connected to the first air inlet chambers on the first clamping block and the second clamping block, and the first air inlet chamber is connected to the inside of the embedded grooves of multiple contact assemblies through pipelines.

[0008] Furthermore, the contact assembly includes a plurality of sealed sliding plates embedded and slidably connected to the side walls of the first clamping block and the second clamping block, a spring is fixedly connected to the outer wall of one side of each of the sealed sliding plates, the other end of each of the springs is fixedly connected to the bottom wall of the embedded groove, and a touch rod is fixedly connected to the outer wall of the other side of each of the sealed sliding plates, a groove is provided at one end of the touch rod away from the sealing sliding plate, and a touch pad is rotatably connected between the inner cavity side walls of the groove.

[0009] Furthermore, a first control pipeline is fixedly connected to the side walls of each of the touch rods near both ends of the touch pad shaft, and a second control pipeline is fixedly connected to the outer wall of one side of each of the touch pads; The second air inlet cavity includes a sealed shell, and the first solenoid valve, the second solenoid valve and the third solenoid valve are fixedly installed inside the sealed shell. The first control pipeline near the two ends of the touch pad shaft is connected with the first solenoid valve and the second solenoid valve respectively after being bundled with pipelines, and the second control pipeline is connected with the third solenoid valve after being bundled with pipelines. The second air inlet cavity is connected with an external pressurizing device through a pipeline.

[0010] Furthermore, the touch pad includes a rotating sleeve rotatably connected between the side walls of the inner cavity of the groove and a sliding rod fixedly connected between the side walls of the inner cavity of the groove, the sliding rod is arranged inside the rotating sleeve, and the sliding rod is coaxial with the rotating sleeve, a driving plate is slidably connected to the outer wall of the sliding rod, and a clamping plate is fixedly connected to the outer wall of the rotating sleeve.

[0011] Furthermore, a first flexible pad is symmetrically arranged on the top surface of the clamping plate, a plurality of teeth are arranged on the bottom surface of the clamping plate, receiving grooves are opened on the outer walls on both sides of the clamping plate, and an extension piece is slidably connected inside the receiving groove.

[0012] Furthermore, the extension member includes an extension plate slidably connected to the inside of the receiving groove, the inside of the extension plate is a cavity structure, a second flexible pad is slidably provided on the top surface of the extension plate, and a toothed plate is slidably provided on the bottom surface of the extension plate.

[0013] Furthermore, a spiral groove is provided on the inner cavity side wall of the rotating sleeve, strip grooves are symmetrically provided on the side wall of the sliding rod, and elastically embedded card beads are provided on the outer walls of the sliding rod near both ends.

[0014] Furthermore, the driving plate includes a circular plate slidably connected to the side wall of the sliding rod, a through hole matching the cross-section of the sliding rod is opened at the center of the circular plate, a positioning groove is opened on the inner cavity side wall of the through hole, and a ball is embedded and rotatably arranged on the side wall of the circular plate, and the ball rolls against the inner wall of the spiral groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By setting a driving component and a pressure component, when the second clamping block approaches the first clamping block, the pressure component is compressed to increase the pressure of the first air inlet cavity, and then diffused to multiple contact components, the contact components are pushed out by pressure, and remain stable and do not retract after fitting the special-shaped parts. No manual operation is required by the operator, and it is more convenient to use; by setting a reciprocating flippable contact pad, when clamping special-shaped parts with surface requirements, the special-shaped parts are contacted through the flexible pad block, and when clamping special-shaped parts with more angular surfaces, the contact pad is flipped 180° and switched to the tooth surface, so as to achieve a better clamping effect; by setting an extension piece, when the clamping surface of the special-shaped part is large or the weight of the special-shaped part is large, the contact area is increased by extending the extension piece, so as to achieve a more stable clamping effect, avoid relative sliding and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the driving component part of the present invention; Figure 3 It is a schematic structural diagram of the second air inlet cavity part of the present invention; Figure 4 It is a schematic diagram of the structure of the pressure component part of the present invention; Figure 5 It is a schematic structural diagram of the contact assembly part of the present invention; Figure 6 It is a schematic structural diagram of the contact pad part in the contact assembly of the present invention; Figure 7 It is a structural schematic diagram of the extension part in the present invention; Figure 8 It is a cross-sectional structural schematic diagram of the rotating sleeve and the sliding rod part of the present invention; Fig. 9 It is a schematic structural diagram of the driving plate part in the present invention.

[0017] In the figure: 1, fixed seat; 2, vertical plate; 3, mounting plate; 4, first clamping block; 5, slide groove; 6, driving assembly; 61, electric telescopic rod; 62, first guide rod; 63, second guide rod; 64, connecting block; 65, oblique rod; 7, second clamping block; 8, contact assembly; 81, sealing sliding plate; 82, spring; 83, contact rod; 831, groove; 84, contact pad; 841, rotating sleeve; 8411, spiral groove; 842, slide rod; 8421, strip groove; 8422, card bead; 843, driving plate; 8431, circular plate; 8432, through hole; 8433, positioning groove; 8434, ball bearing; 844, clamping plate; 8441, first flexible pad; 8442, teeth; 8443, receiving groove; 845, extension piece; 8451, extension plate; 8452, second flexible pad; 8453, tooth plate; 85, first control pipeline; 86, second control pipeline; 9, pressure assembly; 91, piston cylinder; 92, piston; 93, piston rod; 94, first one-way tube; 95, second one-way tube; 10, first air inlet chamber; 20, second air inlet chamber; 201, sealed housing; 202, first solenoid valve; 203, second solenoid valve; 204, third solenoid valve. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In order to solve the technical problem of maintaining pressure by manually operating the valve and keeping the contact stable after extending a certain length, the operation is inconvenient, such as Figure 1-Figure 5 As shown, the following preferred technical solutions are provided: A clamping mechanism for a special-shaped parts processing machine tool comprises a fixed seat 1, two vertical plates 2 are fixedly connected to the top surface of the fixed seat 1, a mounting plate 3 is fixedly connected to the top surfaces of the two vertical plates 2, a first clamping block 4 is fixedly connected to one side of the top surface of the mounting plate 3, a slide groove 5 is provided on the top surface of the mounting plate 3, a driving component 6 is fixedly installed on the side surface of one of the vertical plates 2, a second clamping block 7 is slidably arranged in the slide groove 5, the bottom surface of the second clamping block 7 is fixedly connected to the movable end of the driving component 6, a plurality of contact components 8 are slidably embedded on the side walls of the first clamping block 4 and the second clamping block 7, a pressure component 9 is symmetrically fixedly connected to the top surface of the fixed seat 1, a first air inlet cavity 10 is fixedly installed on one end of the first clamping block 4 and the second clamping block 7, the output end of the pressure component 9 is connected to the inside of the first air inlet cavity 10 through a pipeline, and a second air inlet cavity 20 is fixedly installed on the other end of the first clamping block 4 and the second clamping block 7.

[0020] During clamping, the special-shaped part is placed between the first clamping block 4 and the second clamping block 7 on the mounting plate 3, and then the second clamping block 7 is driven to move by the driving component 6 so that the second clamping block 7 is close to the first clamping block 4. At the same time, the movable end of the driving component 6 moves while compressing the pressure component 9 to pressurize the inside of the first air inlet chamber 10. The first air inlet chamber 10 diffuses the pressure to the embedded grooves of each contact component 8 through the pipeline, and the contact component 8 is extended and fits on the outer wall of the special-shaped part through the pushing effect of pressure, so that the clamping mechanism can adapt to special-shaped parts of different shapes, and the contact component 8 will not retract after being extended due to the pressure effect, resulting in unstable clamping.

[0021] When clamping special-shaped parts with certain surface requirements, the flexible surface of the contact assembly 8 contacts the workpiece to avoid damage to the workpiece surface. When clamping special-shaped parts with no specific surface requirements and a relatively rough surface, the inside of the second air inlet chamber 20 is pressurized by an external booster device. The second air inlet chamber 20 flips the contact assembly 8 by changing the air supply pipeline, and switches the flexible surface to the tooth surface, so that it can clamp the special-shaped parts firmly and avoid damage to the flexible material, which affects the clamping effect. When clamping special-shaped parts with a large clamping surface or a large weight, the second air inlet chamber 20 controls the contact assembly 8 by changing the air supply pipeline, and enhances the clamping effect by increasing the contact area between the contact assembly 8 and the special-shaped parts.

[0022] The driving assembly 6 includes an electric telescopic rod 61 fixedly connected to the side surface of one of the vertical plates 2, a first guide rod 62 symmetrically fixedly connected between the two vertical plates 2, and a second guide rod 63 fixedly connected to the inner wall of the slide groove 5. A connecting block 64 is slidably provided on the side walls of the first guide rod 62 and the second guide rod 63. The movable end of the electric telescopic rod 61 is fixedly connected to the side wall of the connecting block 64. Two inclined rods 65 are symmetrically fixedly connected to the side wall of the connecting block 64. The top surface of the connecting block 64 is fixedly connected to the bottom surface of the second clamping block 7.

[0023] The pressure assembly 9 includes two piston cylinders 91 symmetrically fixedly connected to the top surface of the fixed seat 1, each piston cylinder 91 is sealed and slidably connected with a piston 92, and each piston 92 is fixedly connected to a piston rod 93 on the side wall, and each piston rod 93 is slidably connected to the side wall of the corresponding piston cylinder 91, and one end of the two piston rods 93 located outside the piston cylinder 91 is fixedly connected to the side walls of the two inclined rods 65 respectively, and one end of each piston cylinder 91 is fixedly connected with a first one-way tube 94 and a second one-way tube 95, and one end of the two first one-way tubes 94 is respectively connected to the first air inlet cavity 10 on the first clamping block 4 and the second clamping block 7, and the first air inlet cavity 10 is connected to the inside of the embedded groove of the plurality of contact assemblies 8 through a pipeline.

[0024] The contact assembly 8 includes a plurality of sealing sliding plates 81 which are embedded and slidably connected to the side walls of the first clamping block 4 and the second clamping block 7. A spring 82 is fixedly connected to the outer wall of one side of each sealing sliding plate 81. The other end of each spring 82 is fixedly connected to the bottom wall of the embedded groove. A contact rod 83 is fixedly connected to the outer wall of the other side of each sealing sliding plate 81. A groove 831 is provided at one end of the contact rod 83 away from the sealing sliding plate 81. A contact pad 84 is rotatably connected between the inner cavity side walls of the groove 831.

[0025] Specifically, when the electric telescopic rod 61 pulls the connecting block 64, the second clamping block 7 moves close to the first clamping block 4, and the two piston rods 93 are driven to move through the inclined rod 65 on the connecting block 64, so that the piston 92 can press the gas inside the piston cylinder 91 into the first air inlet chamber 10. The first air inlet chamber 10 will diffuse the pressurized gas to the embedded grooves of multiple contact assemblies 8, and push the sealing sliding plate 81 to slide outward through the pressure, so that the contact rod 83 drives the contact pad 84 to extend and finally fits tightly to the surface of the special-shaped part. Due to the irregular shape of the surface of the special-shaped part, multiple contact assemblies 8 are blocked after extending to different lengths, thereby achieving the clamping effect of special-shaped parts of different shapes, and since the position of the electric telescopic rod 61 is fixed after it stops, it can achieve the effect of maintaining pressure, so that the contact assembly 8 will not retract, thereby ensuring the stability of clamping the special-shaped part.

[0026] In order to solve the technical problem that when clamping special-shaped parts with surface requirements, it is easy to cause scratches on the surface and damage the workpiece by clamping them with rigid clamps, such as Figure 5-Figure 9 As shown, the following preferred technical solutions are provided: A first control pipeline 85 is fixedly connected to the side walls of each touch rod 83 near the two ends of the rotating shaft of the touch pad 84; The second air inlet chamber 20 includes a sealed shell 201, and a first solenoid valve 202, a second solenoid valve 203 and a third solenoid valve 204 are fixedly installed inside the sealed shell 201. The first control pipeline 85 near the two ends of the rotating shaft of the touch pad 84 is connected to the first solenoid valve 202 and the second solenoid valve 203 respectively after being bundled through the pipeline. The second air inlet chamber 20 is connected to the external pressurizing equipment through the pipeline.

[0027] The touch pad 84 includes a rotating sleeve 841 rotatably connected between the inner cavity side walls of the groove 831 and a sliding rod 842 fixedly connected between the inner cavity side walls of the groove 831. The sliding rod 842 is arranged inside the rotating sleeve 841, and the sliding rod 842 is coaxial with the rotating sleeve 841. A driving plate 843 is slidably connected to the outer wall of the sliding rod 842, and a clamping plate 844 is fixedly connected to the outer wall of the rotating sleeve 841.

[0028] A spiral groove 8411 is provided on the inner cavity side wall of the rotating sleeve 841 , strip grooves 8421 are symmetrically provided on the side wall of the sliding rod 842 , and elastically embedded clamping beads 8422 are provided on the outer walls of the sliding rod 842 near both ends.

[0029] The driving plate 843 includes a circular plate 8431 slidably connected to the side wall of the sliding rod 842. A through hole 8432 matching the cross-section of the sliding rod 842 is opened at the center of the circular plate 8431. A positioning groove 8433 is opened on the inner cavity side wall of the through hole 8432. A ball 8434 is embedded and rotatably arranged on the side wall of the circular plate 8431. The ball 8434 rolls against the inner wall of the spiral groove 8411.

[0030] A first flexible pad 8441 is symmetrically arranged on the top surface of the clamping plate 844, a plurality of teeth 8442 are arranged on the bottom surface of the clamping plate 844, and receiving grooves 8443 are opened on the outer walls on both sides of the clamping plate 844, and an extension piece 845 is slidably connected inside the receiving groove 8443.

[0031] Specifically, when clamping a special-shaped part with surface requirements, the first flexible pad 8441 contacts the surface of the special-shaped part to avoid scratches on the surface of the special-shaped part during clamping, which may cause damage to the workpiece. When clamping a special-shaped part with a rough surface or many edges and corners, the pressure of the external pressurizing device is transmitted to the first control pipeline 85 by opening the first solenoid valve 202. The first control pipeline 85 passes through the side wall of the groove 831 and is connected to one end of the rotating sleeve 841. When the pressure overcomes the elastic force of the card bead 8422, the driving plate 843 is pushed to one side, and the positioning groove 8433 is separated from the card bead 8422 at one end. , and starts to slide along the slide bar 842. At this time, the ball 8434 on the side wall of the circular plate 8431 rolls against the spiral groove 8411 of the rotating sleeve 841, thereby driving the rotating sleeve 841 to rotate. When the driving plate 843 slides from one end of the slide bar 842 to the other end and is again engaged with the card bead 8422 for positioning, the rotating sleeve 841 drives the touch pad 84 to complete a 180° flip. At this time, the touch pad 84 has the teeth 8442 facing outward and contacts with the special-shaped part. Conversely, when it is necessary to clamp the special-shaped part with surface requirements, the second solenoid valve 203 is opened to make the driving plate 843 move in the opposite direction, thereby achieving the effect of switching the contact surface of the clamping mechanism.

[0032] In order to solve the technical problem that when the clamping surface of some special-shaped parts is large or the weight is large, the clamping part is relatively concentrated, which may cause the workpiece to slide relative to each other. Figure 3 , Figure 5 and Figure 7 As shown, the following preferred technical solutions are provided: A second control pipeline 86 is fixedly connected to an outer wall of one side of each contact pad 84 , and the second control pipeline 86 is connected to the third solenoid valve 204 through a pipeline bundle.

[0033] The extension piece 845 includes an extension plate 8451 slidably connected to the inside of the receiving groove 8443. The interior of the extension plate 8451 is a cavity structure. A second flexible pad 8452 is slidably arranged on the top surface of the extension plate 8451, and a tooth plate 8453 is slidably arranged on the bottom surface of the extension plate 8451.

[0034] Specifically, when the clamping surface of the special-shaped part to be clamped is large or the weight is heavy, the third solenoid valve 204 is opened to allow pressure to enter the receiving groove 8443 and the interior of the expansion plate 8451 through the second control line 86. The expansion plate 8451 is extended outward by the action of pressure, and the second flexible pad 8452 and the tooth plate 8453 are able to slide outward from the expansion plate 8451 by further pressurization, so that the second flexible pad 8452 is flush with the first flexible pad 8441, and the tooth plate 8453 is flush with the tooth 8442, thereby increasing the contact area between the touch pad 84 and the special-shaped part and increasing the stability of the clamping.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping mechanism for a special-shaped part processing machine tool, comprising a fixing seat (1), characterized in that: Two vertical plates (2) are fixedly connected to the top surface of the fixed seat (1), and a mounting plate (3) is fixedly connected to the top surfaces of the two vertical plates (2). A first clamping block (4) is fixedly connected to one side of the top surface of the mounting plate (3). A slide groove (5) is provided on the top surface of the mounting plate (3), and a driving component (6) is fixedly installed on the side surface of one of the vertical plates (2). A second clamping block (7) is slidably arranged in the slide groove (5), and the bottom surface of the second clamping block (7) is fixedly connected to the movable end of the driving component (6). A plurality of contact assemblies (8) are slidably embedded on the side walls of the first clamping block (4) and the second clamping block (7); a pressure assembly (9) is symmetrically fixedly connected to the top surface of the fixed seat (1); a first air inlet cavity (10) is fixedly installed at one end of the first clamping block (4) and the second clamping block (7); an output end of the pressure assembly (9) is connected to the inside of the first air inlet cavity (10) through a pipeline; and a second air inlet cavity (20) is fixedly installed at the other end of the first clamping block (4) and the second clamping block (7); The driving assembly (6) comprises an electric telescopic rod (61) fixedly connected to the side of one of the vertical plates (2), a first guide rod (62) symmetrically fixedly connected between the two vertical plates (2), and a second guide rod (63) fixedly connected to the inner wall of the slide groove (5), a connecting block (64) being slidably provided on the side walls of the first guide rod (62) and the second guide rod (63), a movable end of the electric telescopic rod (61) being fixedly connected to the side wall of the connecting block (64), two oblique rods (65) being symmetrically fixedly connected to the side wall of the connecting block (64), and a top surface of the connecting block (64) being fixedly connected to a bottom surface of the second clamping block (7); The pressure assembly (9) comprises two piston cylinders (91) symmetrically fixedly connected to the top surface of the fixed seat (1); each piston cylinder (91) is sealed and slidably connected with a piston (92); each piston (92) is fixedly connected with a piston rod (93) on the side wall; each piston rod (93) is slidably connected to the side wall of the corresponding piston cylinder (91); one end of the two piston rods (93) located outside the piston cylinder (91) is respectively fixedly connected to the side walls of the two inclined rods (65); one end of each piston cylinder (91) is fixedly connected with a first one-way tube (94) and a second one-way tube (95); one end of the two first one-way tubes (94) is respectively connected to the first air inlet cavity (10) on the first clamping block (4) and the second clamping block (7); and the first air inlet cavity (10) is connected to the inside of the embedded grooves of the plurality of contact assemblies (8) through pipelines.

2. The clamping mechanism for a special-shaped parts processing machine tool according to claim 1, characterized in that: The contact assembly (8) comprises a plurality of sealing sliding plates (81) which are embedded and slidably connected to the side walls of the first clamping block (4) and the second clamping block (7); a spring (82) is fixedly connected to the outer wall of one side of each sealing sliding plate (81); the other end of each spring (82) is fixedly connected to the bottom wall of the embedded groove; a contact rod (83) is fixedly connected to the outer wall of the other side of each sealing sliding plate (81); a groove (831) is formed at one end of the contact rod (83) away from the sealing sliding plate (81); and a contact pad (84) is rotatably connected between the inner cavity side walls of the groove (831).

3. The clamping mechanism for a special-shaped parts processing machine tool according to claim 2, characterized in that: A first control pipeline (85) is fixedly connected to the side walls of each of the touch rods (83) close to the two ends of the rotating shaft of the touch pad (84), and a second control pipeline (86) is fixedly connected to the outer wall of one side of each of the touch pads (84); The second air inlet cavity (20) comprises a sealed housing (201), a first solenoid valve (202), a second solenoid valve (203) and a third solenoid valve (204) being fixedly mounted inside the sealed housing (201), the first control pipeline (85) close to both ends of the rotating shaft of the touch pad (84) being respectively connected to the first solenoid valve (202) and the second solenoid valve (203) through pipeline bundling, the second control pipeline (86) being connected to the third solenoid valve (204) through pipeline bundling, and the second air inlet cavity (20) being connected to an external pressurizing device through a pipeline.

4. The clamping mechanism for a special-shaped parts processing machine tool according to claim 3, characterized in that: The touch pad (84) comprises a rotating sleeve (841) rotatably connected between the inner cavity side walls of the groove (831) and a sliding rod (842) fixedly connected between the inner cavity side walls of the groove (831); the sliding rod (842) is arranged inside the rotating sleeve (841), and the sliding rod (842) is coaxial with the rotating sleeve (841); a driving plate (843) is slidably connected to the outer wall of the sliding rod (842); and a clamping plate (844) is fixedly connected to the outer wall of the rotating sleeve (841).

5. The clamping mechanism for a special-shaped parts processing machine tool according to claim 4, characterized in that: A first flexible pad (8441) is symmetrically arranged on the top surface of the clamping plate (844), a plurality of teeth (8442) are arranged on the bottom surface of the clamping plate (844), and receiving grooves (8443) are provided on the outer walls on both sides of the clamping plate (844), and an extension piece (845) is slidably connected inside the receiving groove (8443).

6. The clamping mechanism for a special-shaped parts processing machine tool according to claim 5, characterized in that: The extension piece (845) comprises an extension plate (8451) slidably connected to the interior of the receiving groove (8443); the interior of the extension plate (8451) is a cavity structure; a second flexible pad (8452) is slidably provided on the top surface of the extension plate (8451); and a tooth plate (8453) is slidably provided on the bottom surface of the extension plate (8451).

7. The clamping mechanism for a special-shaped parts processing machine tool according to claim 4, characterized in that: A spiral groove (8411) is provided on the inner cavity side wall of the rotating sleeve (841), strip grooves (8421) are symmetrically provided on the side wall of the sliding rod (842), and elastically embedded clamping beads (8422) are provided on the outer walls of the sliding rod (842) near both ends.

8. The clamping mechanism for a special-shaped parts processing machine tool according to claim 7, characterized in that: The driving plate (843) comprises a circular plate (8431) slidably connected to the side wall of the sliding rod (842); a through hole (8432) matching the cross section of the sliding rod (842) is provided at the center of the circular plate (8431); a positioning groove (8433) is provided on the inner cavity side wall of the through hole (8432); a ball (8434) is rotatably embedded in the side wall of the circular plate (8431); the ball (8434) rolls against the inner wall of the spiral groove (8411).

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