Sectional bending clamping and relaxing mechanism

Abstract

The present application relates to a kind of profile stretch bending clamping relaxation mechanism, comprising: clamping assembly and power component, clamping assembly includes taper sleeve and multiple clamping blocks, multiple clamping blocks are slidably connected on the inner wall of taper sleeve along the axis of taper sleeve, multiple clamping blocks are arranged oppositely and define a clamping area between multiple clamping blocks;Power output of power component reciprocatingly moves along the axis of taper sleeve, and its power output corresponds the large diameter end of taper sleeve and is fixed with multiple clamping blocks, and multiple clamping blocks are slid along the axis of taper sleeve reciprocatingly, when profile is clamped, multiple clamping blocks are moved to the small diameter end of taper sleeve, and clamping area is reduced, while multiple clamping blocks can correspond to multiple surfaces of profile, to improve the stability of clamping, the mechanism is simple in structure, easy to operate, and can stably clamp or quickly loosen the profile of processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of profile stretch bending, in particular to a profile stretch bending clamping and relaxing mechanism. BACKGROUND

[0002] When processing profiles, the two ends of the profile need to be safely and reliably clamped, and then a forming tool is used for forming processing.

[0003] When forming and clamping common one-letter cross-section products such as part of the automobile door frame, waist line decorative strips, etc., a single hydraulic cylinder is used to directly clamp two opposite surfaces of the profile, which can realize stable clamping forming. However, for other cross-section profiles, such as rectangular cavity cross-section bumper beams, C-shaped cross-section upper decorative strips, etc., the stretch bending process is used for forming, and the entire cross-section needs to be surrounded by a clamping block to realize stable clamping forming. For this type of profile, directly clamping two opposite surfaces with one hydraulic cylinder is not reliable, and clamping four surfaces with two hydraulic cylinders is too large and costly.

[0004] Therefore, how to design a simple structure, convenient operation and stable multi-directional clamping mechanism for clamping profiles is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] The present application provides a profile stretch bending clamping and relaxing mechanism, which solves the technical problems of complex structure, high clamping cost or inability to clamp multiple surfaces of the existing profile stretch bending clamping device.

[0006] The technical scheme for solving the above technical problems is as follows: a profile stretch bending clamping and relaxing mechanism, comprising: a clamping assembly and a power assembly,

[0007] The clamping assembly comprises a tapered sleeve and a plurality of clamping blocks, the plurality of clamping blocks are slidably connected to the inner wall of the tapered sleeve along the axis of the tapered sleeve, and the plurality of clamping blocks are arranged opposite to each other and define a clamping area between them.

[0008] The power output end of the power assembly reciprocally moves along the axial direction of the tapered sleeve, and the power output end of the power assembly is fixed to the large diameter end of the tapered sleeve and the plurality of clamping blocks, and pushes the plurality of clamping blocks to reciprocally slide along the axis of the tapered sleeve, so as to expand or reduce the size of the clamping area.

[0009] The beneficial effects of the present application are: by arranging the plurality of clamping blocks opposite to each other and slidably connecting them to the inner wall of the tapered sleeve along the axial direction of the tapered sleeve, the power output end of the power assembly can push the plurality of clamping blocks to reciprocally slide along the axis of the tapered sleeve, expand or reduce the size of the clamping area, when clamping the profile, push the plurality of clamping blocks to move towards the small diameter end of the tapered sleeve, reduce the clamping area, and the plurality of clamping blocks can correspond to multiple surfaces of the profile, thereby improving the stability of clamping.

[0010] On the basis of the above technical solutions, the application can be further improved as follows.

[0011] Further, the clamping assembly further comprises a plurality of discharging screws, the outer wall of the taper sleeve is provided with a plurality of long holes penetrating the inner wall in the axial direction; the contact surface of the plurality of clamping blocks in contact with the inner wall of the taper sleeve is an inclined surface inclined from the large diameter end of the taper sleeve to the small diameter end of the taper sleeve, and the inclined surface of the plurality of clamping blocks is provided with a threaded hole perpendicular to the inclined surface; the plurality of discharging screws are respectively inserted through the plurality of long holes and fixed in the threaded holes.

[0012] The above further beneficial effects are: by inserting the plurality of discharging screws into the long holes and fixing them in the threaded holes of the plurality of clamping blocks, the stability of the movement of the plurality of clamping blocks can be improved, and the clamping blocks can be prevented from deviating during movement.

[0013] Further, the clamping assembly further comprises a cylindrical joint, one end of the plurality of clamping blocks close to the large diameter end of the taper sleeve extends a hook; the cylindrical joint has a flange extending radially outward on the side corresponding to the plurality of clamping blocks close to the large diameter end of the taper sleeve and on the end close to the plurality of clamping blocks; the plurality of hooks are detachably hooked on the flange, and the end of the cylindrical joint away from the plurality of clamping blocks is fixed with the power output end of the power assembly.

[0014] The above further beneficial effects are: the hooks of the plurality of clamping blocks are respectively hooked on the flange of the cylindrical joint, which can improve the stability of the movement of the plurality of clamping blocks and prevent the clamping blocks from deviating during movement.

[0015] Further, the power assembly comprises a first cylinder, a sealing cylinder, a sealing seat and a piston cylinder,

[0016] The first cylinder is fixed at the large diameter end of the taper sleeve close to the taper sleeve; the sealing cylinder is fixed on the inner wall of the first cylinder close to the taper sleeve; the sealing seat is provided with a first annular groove close to the taper sleeve, and the first annular groove is fixed on the outer wall of the other end of the first cylinder away from the taper sleeve, and the sealing seat extends a limiting column to the taper sleeve direction on the inner side corresponding to the first annular groove;

[0017] The piston cylinder comprises a first piston cylinder segment and a second piston cylinder segment connected integrally in sequence from the direction away from the taper sleeve to the direction close to the taper sleeve, the first piston cylinder segment slides along the axial direction of the first cylinder barrel, is sleeved on the outer circumferential side of the limiting column from the end of the first cylinder barrel inside and away from the taper sleeve, and defines a first oil cavity between the limiting column, the first cylinder barrel and the first piston cylinder segment, the second piston cylinder segment slides along the axial direction of the first cylinder barrel, is arranged inside the sealing cylinder, and defines a second oil cavity between the first piston cylinder segment, the second piston cylinder segment, the sealing cylinder and the first cylinder barrel, the second piston cylinder segment is a power output end of the driving assembly, and the end of the second piston cylinder segment close to the taper sleeve is fixed with one end of the cylindrical connector; the first cylinder barrel is provided with a first oil hole in communication with the first oil cavity and a second oil hole in communication with the second oil cavity.

[0018] The further beneficial effect is that the first oil cavity and the second oil cavity are defined between the limiting column, the first cylinder barrel and the first piston cylinder segment and between the first piston cylinder segment, the second piston cylinder segment, the sealing cylinder and the first cylinder barrel, the first cylinder barrel is provided with the first oil hole in communication with the first oil cavity and the second oil hole in communication with the second oil cavity, when the oil pressure in the first oil cavity is greater than the oil pressure in the second oil cavity, the first piston cylinder segment and the second piston cylinder segment are pushed to move towards the taper sleeve, and the plurality of clamping blocks are pushed to move towards the small-diameter end of the taper sleeve, when the oil pressure in the second oil cavity is greater than the oil pressure in the first oil cavity, the first piston cylinder segment and the second piston cylinder segment are pushed to move away from the taper sleeve, and the plurality of clamping blocks are pushed to move towards the large-diameter end of the taper sleeve, the first oil cavity and the second oil cavity can be operated by the same oil cylinder, thereby avoiding the arrangement of multiple oil cylinders, reducing the structure of the clamping device, and reducing the operation cost and maintenance cost of the clamping device.

[0019] Further, the clamping assembly further comprises a locking nut, the outer wall of the taper sleeve close to the large-diameter end is provided with a thread, the locking nut is threadedly connected on the thread of the large-diameter end of the taper sleeve, and the inner wall of the end of the locking nut away from the taper sleeve extends a first limiting protrusion radially inwardly, the first cylinder barrel is inserted into the inside of the end of the locking nut away from the taper sleeve, and the insertion end of the first cylinder barrel extends a second limiting protrusion radially outwardly, and the first limiting protrusion is abuttable with the second limiting protrusion.

[0020] Further, the outer wall of the end of the sealing cylinder close to the taper sleeve extends a third limiting protrusion radially outwardly, the outer wall of the end of the taper sleeve close to the taper sleeve extends a fourth limiting protrusion radially outwardly, the inner wall of the end of the first cylinder barrel close to the taper sleeve extends a first limiting groove radially inwardly, and the inner wall of the large-diameter end of the taper sleeve extends a second limiting groove radially inwardly, and the third limiting protrusion and the fourth limiting protrusion are respectively inserted into the first limiting groove and the second limiting groove.

[0021] Further, a plurality of sealing rings are respectively sleeved between the first cylinder and the first annular groove, between the first piston cylinder segment and the first cylinder, between the second piston cylinder segment and the sealing cylinder, and between the sealing cylinder and the first cylinder.

[0022] The above further beneficial effect is that the oil in the first cylinder and the second cylinder can be prevented from leaking out of the first cylinder and the first annular groove, the first piston cylinder segment and the first cylinder, the second piston cylinder segment and the sealing cylinder, or the sealing cylinder and the first cylinder.

[0023] Further, a through core assembly is provided, which comprises a core rod and a power member, the sealing seat, the limiting column and the inner part of the cylindrical joint each have a through hole penetrating through both ends thereof, the plurality of through holes are coaxially arranged with the inner holes of the first piston cylinder segment and the second piston cylinder segment, the core rod is sleeved in the inner holes of the first piston cylinder segment and the second piston cylinder segment and is slidingly connected in the through holes, one end of the core rod penetrating through the through hole of the cylindrical joint can extend into the clamping area, and the power member is sleeved in the through holes of the sealing seat and the limiting column and its extending end is fixed with the other end of the core rod.

[0024] The above further beneficial effect is that the core rod is sleeved in the first piston cylinder segment and the second piston cylinder segment and is slidingly connected in the through hole, one end of the core rod penetrating through the through hole of the cylindrical joint can extend into the clamping area and abut against the profile in the clamping area, so that the profile is clamped.

[0025] Further, a fixed shaft sleeve and a second cylinder are provided, the fixed shaft sleeve is sleeved on the outer circumferential side of the first cylinder along the axial direction of the first cylinder, the second cylinder is in abutment with one end of the fixed shaft sleeve away from the taper sleeve and is sleeved on the outer circumferential side of the first cylinder along the axial direction of the first cylinder, a second annular groove extends outwardly along the radial direction of the second cylinder from the inner wall of one end of the second cylinder away from the taper sleeve, the sealing seat is inserted into the second annular groove corresponding to the groove wall end of the first annular groove, a third oil cavity is defined in the groove wall end of the first annular groove and in the second annular groove, and the second cylinder is provided with a third oil hole communicating with the third oil cavity.

[0026] The further beneficial effect is that the clamped profile is in a processing state, the oil pressure in the third oil cavity is increased, the fixed position of the clamp is kept, and the stability of the clamping of the clamp is improved; after the profile processing is completed, the oil pressure in the third oil cavity is reduced, the clamped profile is elastically deformed due to internal stress, at this time, the clamping mechanism and the power mechanism can be driven to move along the axis direction of the fixed shaft sleeve, and then the internal stress of the clamped profile is unloaded, the damage of the clamping block to the clamping area of the stretch-bent piece is reduced, and the noise when the clamping block is loosened can be reduced.

[0027] Further, the annular limiting boss can be further included, which is integrally connected to the outer circumferential side of the first cylinder barrel at the end close to the taper sleeve; and the end face of the fixed shaft sleeve close to the taper sleeve can abut against the annular limiting boss.

[0028] The further beneficial effect is that the end face of the fixed shaft sleeve close to the taper sleeve abuts against the annular limiting boss, so that the sealing seat, the first cylinder barrel, the locking nut and the taper sleeve are limited to continuously move away from the profile. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a perspective structural schematic view of the profile stretch-bending clamping and relaxing mechanism of the application;

[0030] Figure 2 It is a structural schematic view of the cylindrical joint in the profile stretch-bending clamping and relaxing mechanism of the application;

[0031] Figure 3 It is an internal structural schematic view of the profile stretch-bending clamping and relaxing mechanism of the application;

[0032] Figure 4 It is a structural schematic view of the clamping block in the profile stretch-bending clamping and relaxing mechanism of the application.

[0033] In the drawings, the components represented by the numbers are listed as follows:

[0034] 1 clamping assembly, 11 taper sleeve, 111 long hole, 12 clamping block, 121 hook, 13 unloading screw, 14 cylindrical joint, 141 flange, 15 locking nut, 151 first limiting block,

[0035] 2 power assembly, 21 first cylinder barrel, 211 second limiting block, 212 annular limiting boss, 22 sealing barrel, 221 third limiting block, 222 fourth limiting block, 23 sealing seat, 231 first annular groove, 232 limiting column, 24 piston barrel, 241 first piston barrel section, 242 second piston barrel section, 25 first oil cavity, 26 second oil cavity, 27 sealing ring,

[0036] 3, core rod, 32, power element,

[0037] 4, fixed sleeve, 5, second cylinder, 51, second annular groove, 6, third oil cavity. DETAILED DESCRIPTION

[0038] The principles and features of the present application are described below in conjunction with the accompanying drawings, which are only used to explain the present application and not to limit the scope of the present application.

[0039] As shown in the drawings, a profile bending and clamping relaxation mechanism comprises a clamping assembly 1 and a power assembly 2, Figure 2

[0040] The clamping assembly 1 comprises a taper sleeve 11 and a plurality of clamping blocks 12, the plurality of clamping blocks 12 are slidably connected to the inner wall of the taper sleeve 11 along the axis of the taper sleeve 11, and the plurality of clamping blocks 12 are arranged opposite to each other and define a clamping area between the plurality of clamping blocks 12.

[0041] The power output end of the power assembly 2 reciprocally moves along the axis of the taper sleeve 11 and the power output end of the power assembly 2 is fixed to the plurality of clamping blocks 12 corresponding to the large diameter end of the taper sleeve 11 and pushes the plurality of clamping blocks 12 to reciprocally slide along the axis of the taper sleeve 11 to expand or reduce the size of the clamping area.

[0042] In some embodiments, the clamping assembly 1 can further comprise a plurality of unloading screws 13, the outer wall of the taper sleeve 11 is provided with a plurality of long holes 111 penetrating the inner wall of the taper sleeve 11 along the axis of the taper sleeve 11; the contact surface of the plurality of clamping blocks 12 in contact with the inner wall of the taper sleeve 11 is an inclined surface inclined from the large diameter end of the taper sleeve 11 to the small diameter end of the taper sleeve 11, and the inclined surface of the plurality of clamping blocks 12 is provided with a threaded hole perpendicular to the inclined surface; the plurality of unloading screws 13 respectively pass through the plurality of long holes 111 and are respectively fixed in the threaded holes.

[0043] In some embodiments, the clamping assembly 1 can further comprise a cylindrical joint 14, one end of the plurality of clamping blocks 12 close to the large diameter end of the taper sleeve 11 extends a hook 121; the cylindrical joint 14 corresponds to one side of the plurality of clamping blocks 12 close to the large diameter end of the taper sleeve 11 and the end of the cylindrical joint 14 close to the plurality of clamping blocks 12 extends a flange 141 radially outward; the plurality of hooks 121 are detachably hooked on the flange 141, and the end of the cylindrical joint 14 away from the plurality of clamping blocks 12 is fixed to the power output end of the power assembly 2.

[0044] In some embodiments, the power assembly 2 can comprise a first cylinder 21, a sealing cylinder 22, a sealing seat 23 and a piston cylinder 24,

[0045] ​The first cylinder 21 is fixed at the large-diameter end of the taper sleeve 11 near one end thereof. The sealing cylinder 22 is fixed to the inner wall of the first cylinder 21 near the one end of the taper sleeve 11. The sealing seat 23 is provided with a first annular groove 231 at the one end thereof near the taper sleeve 11, and the first annular groove 231 is sleeved to the other end of the first cylinder 21 away from the taper sleeve 11. The sealing seat 23 extends to the taper sleeve 11 direction at the inner side corresponding to the first annular groove 231, and is provided with a limiting column 232.

[0046] The piston cylinder 24 includes a first piston cylinder segment 241 and a second piston cylinder segment 242 connected integrally in sequence from the end away from the taper sleeve 11 to the end near the taper sleeve 11. The first piston cylinder segment 241 is slidably arranged in the first cylinder 21 along the axial direction of the first cylinder 21, and is sleeved to the outer circumferential side of the limiting column 232 at the end of the first cylinder 21 away from the taper sleeve 11. The first oil cavity 25 is defined between the limiting column 232, the first cylinder 21 and the first piston cylinder segment 241. The second piston cylinder segment 242 is slidably arranged in the sealing cylinder 22 along the axial direction of the first cylinder 21, and defines the second oil cavity 26 between the first piston cylinder segment 241, the second piston cylinder segment 242, the sealing cylinder 22 and the first cylinder. The second piston cylinder segment 242 is the power output end of the driving assembly, and is fixed to one end of the cylindrical connector 14 near the taper sleeve 11. The first cylinder 21 is provided with a first oil hole communicating with the first oil cavity 25 and a second oil hole communicating with the second oil cavity 26.

[0047] In some embodiments, the clamping assembly 1 further includes a locking nut 15. The outer wall of the taper sleeve 11 near the large-diameter end is provided with a thread. The locking nut 15 is threadedly connected to the thread of the large-diameter end of the taper sleeve 11, and the inner wall of the end of the locking nut 15 away from the taper sleeve 11 extends a first limiting protrusion 151 radially inward. The first cylinder 21 is inserted into the end of the locking nut 15 away from the taper sleeve 11, and the insertion end of the first cylinder 21 extends a second limiting protrusion 211 radially outward. The first limiting protrusion 151 is abuttable with the second limiting protrusion 211.

[0048] In some embodiments, the outer wall of the sealing cylinder 22 near the one end of the taper sleeve 11 extends a third limiting protrusion 221 radially outward. The outer wall of the taper sleeve 11 near the one end of the taper sleeve 11 extends a fourth limiting protrusion 222 radially outward. The inner wall of the first cylinder 21 near the one end of the taper sleeve 11 extends a first limiting groove radially inward. The inner wall of the large-diameter end of the taper sleeve 11 extends a second limiting groove radially inward. The third limiting protrusion 221 and the fourth limiting protrusion 222 are respectively inserted into the first limiting groove and the second limiting groove.

[0049] In some specific embodiments, a plurality of sealing rings 27 can be further included, which are respectively sleeved between the first cylinder 21 and the first annular groove 231, between the first piston cylinder segment 241 and the first cylinder 21, between the second piston cylinder segment 242 and the sealing cylinder 22, and between the sealing cylinder 22 and the first cylinder 21.

[0050] In some specific embodiments, a through core assembly 3 can be further included, which comprises a core rod 31 and a power piece 32, the sealing seat 23, the limiting column 232 and the inside of the cylindrical joint 14 all have through holes penetrating through both ends thereof, the plurality of through holes are coaxially arranged with the inner holes of the first piston cylinder segment 241 and the second piston cylinder segment 242; the core rod 31 is sleeved in the inner holes of the first piston cylinder segment 241 and the second piston cylinder segment 242 and is slidingly connected in the through holes, one end of the core rod 31 penetrating through the through hole of the cylindrical joint 14 can extend into the clamping area, and the power piece 32 is sleeved in the through holes of the sealing seat 23 and the limiting column 232 and its extending end is fixed with the other end of the core rod 31.

[0051] In some specific embodiments, a fixed shaft sleeve 4 and a second cylinder 5 can be further included, the fixed shaft sleeve 4 is sleeved on the outer circumferential side of the first cylinder 21 along the axial direction of the first cylinder 21; the second cylinder 5 is abutted with the end of the fixed shaft sleeve 4 away from the taper sleeve 11 and is sleeved on the outer circumferential side of the first cylinder 21 along the axial direction of the first cylinder 21, the inner wall of the end of the second cylinder 5 away from the taper sleeve 11 extends outwardly along the radial direction thereof and has a second annular groove 51; the sealing seat 23 is inserted into the second annular groove 51 corresponding to the groove wall end of the first annular groove 231, and a third oil cavity 6 is defined in the groove wall end of the first annular groove 231 and in the second annular groove 51, and the second cylinder 5 is provided with a third oil hole communicating with the third oil cavity 6.

[0052] In some specific embodiments, an annular limiting boss 212 can be further included, which is integrally connected to the outer circumferential side of the end of the first cylinder 21 close to the taper sleeve 11; the end face of the fixed shaft sleeve 4 close to the taper sleeve 11 can be abutted with the annular limiting boss 212.

[0053] The above are only the preferred embodiments of the present application and are not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A profile bending clamping and easing mechanism, characterized in that, include: The clamping assembly (1) and the power assembly (2) are provided. The clamping assembly (1) includes a conical sleeve (11) and a plurality of clamping blocks (12). The plurality of clamping blocks (12) are slidably connected to the inner wall of the conical sleeve (11) along the axis of the conical sleeve (11). The plurality of clamping blocks (12) are arranged opposite to each other and a clamping area is defined between the plurality of clamping blocks (12). The clamping assembly (1) also includes a cylindrical joint (14). The power output end of the power assembly (2) moves back and forth along the axial direction of the tapered sleeve (11), and its power output end is fixed to the large diameter end of the tapered sleeve (11) and the multiple clamping blocks (12), and pushes the multiple clamping blocks (12) to slide back and forth along the axis of the tapered sleeve (11) to expand or shrink the size of the clamping area. The power assembly (2) includes a first cylinder (21), a sealing cylinder (22), a sealing seat (23), and a piston cylinder (24). The first cylinder (21) is fixed at one end near the cone sleeve (11) to the large-diameter end of the cone sleeve (11). The sealing cylinder (22) is inserted into the inner wall of the first cylinder (21) near the cone sleeve (11). The sealing seat (23) has a first annular groove (231) at one end near the cone sleeve (11), and the first annular groove (231) is fitted onto the other end of the first cylinder (21) away from the cone sleeve (11). The sealing seat (23) has a limiting post (232) extending from the inner side of the first annular groove (231) toward the cone sleeve (11). The piston cylinder (24) includes, in sequence, an integrally connected first piston cylinder section (241) and a second piston cylinder section (242) in the direction away from the cone sleeve (11) and closer to the cone sleeve (11). The first piston cylinder section (241) slides through the first cylinder (21) along the axial direction and is installed inside the first cylinder (21). One end of the first piston cylinder section (241) is slidably sleeved on the outer periphery of the limiting post (232), and defines a first oil chamber (25) between the limiting post (232), the first cylinder (21) and the first piston cylinder section (241). The second piston cylinder section (242) slides through the sealing cylinder (22) along the axial direction of the first cylinder (21) and defines a second oil chamber (26) between the first piston cylinder section (241), the second piston cylinder section (242), the sealing cylinder (22) and the first cylinder. It also includes a through-hole assembly (3), which includes a mandrel (31) and a power component (32). The sealing seat (23), the limiting post (232) and the cylindrical connector (14) all have through holes that pass through both ends of them. One end of the mandrel (31) that passes through the through hole of the cylindrical connector (14) can extend into the clamping area. The power component (32) passes through the through holes of the sealing seat (23) and the limiting post (232) and its extended end is fixed to the other end of the mandrel (31). It also includes a fixed bushing (4) and a second cylinder (5). The fixed bushing (4) is slidably sleeved on the outer periphery of the first cylinder (21) along the axial direction of the first cylinder (21). The second cylinder (5) abuts against the end of the fixed bushing (4) away from the tapered sleeve (11) and is slidably sleeved on the outer periphery of the first cylinder (21) along the axial direction of the first cylinder (21). The inner wall of the end of the second cylinder (5) away from the tapered sleeve (11) extends radially outward with a second annular groove (51). The sealing seat (23) is inserted into the second annular groove (51) corresponding to the end of the groove wall of the first annular groove (231), and defines a third oil cavity (6) in the end of the groove wall of the first annular groove (231) and in the second annular groove (51). The second cylinder (5) has a third oil passage hole communicating with the third oil cavity (6). It also includes an annular limiting boss (212), which is integrally connected to the outer periphery of the first cylinder (21) near the tapered sleeve (11); the end face of the fixed bushing (4) near the tapered sleeve (11) can abut against the annular limiting boss (212).

2. The profile bending clamping and easing mechanism according to claim 1, characterized in that, The clamping assembly (1) also includes a plurality of unloading screws (13). The outer wall of the tapered sleeve (11) is provided with a plurality of elongated holes (111) that penetrate its inner wall along its axial direction. The contact surfaces of the plurality of clamping blocks (12) and the inner wall of the tapered sleeve (11) are inclined surfaces that are inclined from the large diameter end of the tapered sleeve (11) to the small diameter end of the tapered sleeve (11). The inclined surfaces of the plurality of clamping blocks (12) are provided with threaded holes perpendicular to their inclined surfaces. The plurality of unloading screws (13) pass through the plurality of elongated holes (111) and are respectively fixed in the threaded holes.

3. The profile bending clamping and easing mechanism according to claim 1, characterized in that, Each of the clamping blocks (12) has a hook (121) extending from one end near the large diameter end of the conical sleeve (11); the cylindrical connector (14) has a flange (141) extending radially outward from one end near the large diameter end of the conical sleeve (11) corresponding to the clamping blocks (12); the hooks (121) are detachably hooked onto the flange (141), and the end of the cylindrical connector (14) away from the clamping blocks (12) is fixed to the power output end of the power assembly (2).

4. The profile bending clamping and easing mechanism according to claim 3, characterized in that, The second piston cylinder section (242) is the power output end of the power assembly. The end of the second piston cylinder section (242) near the tapered sleeve (11) is fixed to the end of the cylindrical joint (14). The first cylinder (21) has a first oil passage hole communicating with the first oil chamber (25) and a second oil passage hole communicating with the second oil chamber (26).

5. The profile bending clamping and easing mechanism according to claim 4, characterized in that, The clamping assembly (1) further includes a locking nut (15). The outer wall of the tapered sleeve (11) near its large diameter end is threaded. The locking nut (15) is threaded onto the thread of the large diameter end of the tapered sleeve (11) and a first limiting protrusion (151) extends radially inward from the inner wall of the end away from the tapered sleeve (11). The first cylinder (21) is inserted into the inner end of the locking nut (15) away from the tapered sleeve (11) and a second limiting protrusion (211) extends radially outward from its insertion end. The first limiting protrusion (151) can abut against the second limiting protrusion (211).

6. The profile bending clamping and easing mechanism according to claim 4, characterized in that, The sealing cylinder (22) has a third limiting protrusion (221) extending radially outward from the outer wall of one end near the conical sleeve (11), and a fourth limiting protrusion (222) extending radially outward from the outer wall of one end near the conical sleeve (11). The first cylinder (21) has a first limiting groove extending radially inward from the inner wall of one end near the conical sleeve (11), and a second limiting groove extending radially inward from the inner wall of the large-diameter end of the conical sleeve (11). The third limiting protrusion (221) and the fourth limiting protrusion (222) are respectively inserted into the first limiting groove and the second limiting groove.

7. The profile bending clamping and easing mechanism according to claim 4, characterized in that, It also includes multiple sealing rings (27), which are respectively sleeved between the first cylinder (21) and the first annular groove (231), between the first piston cylinder section (241) and the first cylinder (21), between the second piston cylinder section (242) and the sealing cylinder (22), and between the sealing cylinder (22) and the first cylinder (21).

8. The profile bending clamping and easing mechanism according to claim 4, characterized in that, The plurality of through holes are arranged coaxially with the inner holes of the first piston cylinder section (241) and the second piston cylinder section (242); the mandrel (31) passes through the inner holes of the first piston cylinder section (241) and the second piston cylinder section (242) and is slidably connected in the through holes.

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