Aluminum pipe length stretching device

Abstract

The invention belongs to the technical field of new energy battery shell processing, and provides an aluminum pipe length stretching device which comprises a guide cylinder; a fixing ring; an external expansion module; a clamping block; a clamping piece; and an inner clamp assembly. The end of the aluminum pipe body is extruded through rotation of the external expansion module, so that an external expansion part is formed at the end of the aluminum pipe body, in this way, when the aluminum pipe body is clamped, the external expansion module abuts against the inner side of the external expansion part on the aluminum pipe body, the clamping piece abuts against the outer side of the external expansion part, and clamping of the aluminum pipe body is achieved by clamping the external expansion part; in this way, clamping in the section direction of the aluminum pipe body can be achieved, and compared with the prior art that a chuck clamps the surface of the aluminum pipe body, abrasion to the clamping piece in the horizontal direction can be reduced by clamping the external expansion part, so that reduction of the clamping capacity of the clamping piece is effectively avoided, the stability of the aluminum pipe body during stretching is improved, and the service life of the aluminum pipe body is prolonged. The quality of the stretched aluminum pipe body is prevented from being affected, and the end of the aluminum pipe body is not prone to irreversible damage.

Description

Technical Field

[0001] The invention belongs to the technical field of new energy battery shell processing, and in particular relates to an aluminum tube length stretching device. Background Art

[0002] In the production process of new energy cylindrical battery shells, the materials needed include aluminum tubes. The cylindrical battery shells are obtained through the process of extrusion, cutting, preheating, stretching, rough cutting, cleaning and fine cutting of the aluminum tubes.

[0003] At present, when stretching aluminum tubes, a chain drawing machine is generally used. The aluminum tube is clamped by the chuck on the chain drawing machine, and the drawing trolley drives the chuck to pull the aluminum tube; when the chuck clamps the aluminum tube, the end of the aluminum tube is generally squeezed and compacted, and then the chuck clamps the squeezed and compacted part of the end, or the outer surface or inner wall of the aluminum tube is clamped by a clamp with rough convex points; these clamping methods damage the end of the aluminum tube and are not easy to repair. Moreover, after long-term use of the chuck, its clamping surface will gradually wear, resulting in a decrease in the clamping ability of the chuck, thereby reducing the stability of the aluminum tube during stretching and affecting the quality of the aluminum tube after stretching. Summary of the invention

[0004] The purpose of the present invention is to provide an aluminum tube length stretching device, aiming to solve the technical problem in the prior art that the clamping surface of the chuck will gradually wear after long-term use, resulting in a decrease in the clamping ability of the chuck, thereby reducing the stability of the aluminum tube during stretching and affecting the quality of the aluminum tube after stretching.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An aluminum tube length stretching device, comprising a traction chain rail, a clamp, a stretching die and an inner die assembly, the device also comprising:

[0007] A guide cylinder, the clamp is mounted on a traction platform, a telescopic member 3 is mounted on the traction platform, a guide cylinder is arranged at the output end of the telescopic member 3, and the aluminum tube body is sleeved outside the guide cylinder;

[0008] A fixing ring, wherein the traction platform is fixed with a fixing ring;

[0009] An outward expansion module, the outward expansion module is L-shaped, the side and bottom of the outward expansion module are respectively provided with a guide block 1 and a guide block 2, the fixing ring is provided with an annular groove, the guide block is sleeved in the annular groove, the outer periphery of the guide cylinder is provided with a spiral groove, the guide block 2 is sleeved in the spiral groove, the outward expansion module abuts against the end of the aluminum tube body, the abutting portion of the outward expansion module and the end of the aluminum tube body is in an arc shape, and the end of the aluminum tube body forms an outward expansion portion;

[0010] A clamping block, both movable ends of the clamp are connected with a clamping block;

[0011] A clamping piece, wherein the two clamping blocks are provided with a clamping piece on opposite surfaces thereof, and the clamping piece is used to clamp the outer surface of the aluminum tube body, and the clamping piece abuts against the outward expansion part of the aluminum tube body;

[0012] An inner clamping assembly is installed at one end of the guide cylinder, and the inner clamping assembly is against the inner wall of the aluminum tube body.

[0013] As a preferred embodiment of the above technical solution, the clamping member includes a main clamping plate and a secondary clamping plate, the main clamping plate is connected to the secondary clamping plate, the secondary clamping plate is close to the end of the aluminum tube body, and an arc portion is provided on the inner side of one side of the secondary clamping plate close to the end of the aluminum tube body, and the arc portion is abutted against the arc surface of the outward expansion portion.

[0014] As a preferred embodiment of the above technical solution, the inner clamp assembly includes:

[0015] A fixed block, a connecting sleeve is rotatably mounted on the guide cylinder, a driving member 2 is mounted in the inner cavity of the guide cylinder, a telescopic member 2 is mounted on the output end of the driving member 2, and the output end of the telescopic member 2 passes through the connecting sleeve and is connected to the fixed block;

[0016] Linkage parts, a plurality of linkage parts are installed on the periphery of the connection sleeve;

[0017] An inner clamping plate is installed on the linkage member, and the inner clamping plate abuts against the inner wall of the aluminum tube body.

[0018] As a preferred embodiment of the above technical solution, telescopic parts four are installed at both movable ends of the clamp, and the output end of the telescopic parts four is connected to the clamping block.

[0019] As a preferred embodiment of the above technical solution, a driving member 1 is installed in the clamping block, a gear is provided at the output end of the driving member 1, an arc-shaped rack is provided on the outer side of the auxiliary clamping plate, the rack and the gear are meshed with each other, a guide rod is provided on the side of the auxiliary clamping plate close to the main clamping plate, an arc groove is provided on the side of the main clamping plate close to the auxiliary clamping plate, the guide rod is sleeved in the arc groove, and the two guide rods are symmetrical around the center axis of the aluminum tube body.

[0020] As a preferred embodiment of the above technical solution, a stabilizing component is installed on the traction chain rail, and the stabilizing component includes:

[0021] Bending plates, on the two track surfaces of the traction chain track, bending plates are elastically rotatably mounted, and the two bending plates always tend to approach each other;

[0022] A support plate, the bent portion of the bent plate is provided with a support plate, and two support plates are clamped on the surface of the aluminum tube body;

[0023] An extension part is provided at the movable end of the bending plate, and baffles are provided on both track surfaces of the traction chain rail, and the baffles block the extension part to prevent the extension part from moving to a position between the two track surfaces.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the present invention, the end of the aluminum tube body is squeezed by rotating the expansion module, so that the end of the aluminum tube body forms an expansion part. In this way, when the aluminum tube body is clamped, the expansion module abuts against the inner side of the expansion part on the aluminum tube body, and the clamping piece abuts against the outer side of the expansion part. The aluminum tube body is clamped by clamping the expansion part, so that the cross-sectional direction (longitudinal direction) of the aluminum tube body can be clamped. Compared with the clamping head clamping the surface of the aluminum tube body (horizontal clamping) in the prior art, clamping the expansion part can reduce the wear of the clamping piece in the horizontal direction, thereby effectively avoiding the reduction of the clamping ability of the clamping piece, improving the stability of the aluminum tube body during stretching, avoiding affecting the quality of the aluminum tube body after stretching, and the end of the aluminum tube body is not easily subject to irreversible damage;

[0026] 2. In the present invention, the external expansion module and the clamping member are used to clamp the external expansion part, and the clamping member and the internal clamping assembly are used to clamp the surface and inner wall of the aluminum tube body, so that the aluminum tube body is firmly clamped during stretching, ensuring the stability of the aluminum tube body during stretching, thereby avoiding affecting the quality of the aluminum tube body after stretching; at the same time, after the aluminum tube body is firmly clamped, the clamping member is not easy to wear, thereby effectively avoiding the reduction of the clamping capacity of the clamping member;

[0027] 3. In the present invention, the two auxiliary clamping plates reciprocate on the outer expansion part, so that the size of the outer expansion part slowly becomes the size of the aluminum tube body, so that the end of the aluminum tube body can form a cylindrical battery shell of normal specifications. In subsequent use, there is no need to cut the end of the aluminum tube body, thereby avoiding waste of materials and saving processing costs;

[0028] 4. In the present invention, two support plates clamp the surface of the aluminum tube body by bringing two bending plates close to each other, and cooperate with the clamping parts and the inner clamping assembly to clamp the aluminum tube body, thereby effectively preventing the aluminum tube body from shaking when the outer expansion part is repaired, effectively preventing the aluminum tube body from bending, and avoiding affecting the overall quality of the aluminum tube body after stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is a schematic diagram of the clamp structure;

[0031] Figure 3 It is a schematic diagram of the structure when the aluminum tube body forms an outward expansion portion;

[0032] Figure 4 This is a schematic diagram of the structure after the guide tube and the aluminum tube body are separated;

[0033] Figure 5 Schematic diagram of the structure when the aluminum tube body does not form an external expansion part

[0034] Figure 6 It is a schematic diagram of the cross-sectional structure of the guide tube;

[0035] Figure 7 It is a schematic diagram of the cross-sectional structure of the clamping block;

[0036] Figure 8 This is a schematic diagram of the stable component structure.

[0037] In the figure:

[0038] 1. Traction chain rail; 2. Clamp; 21. Traction platform; 22. Telescopic member 1; 3. Aluminum tube body; 31. Outward expansion part; 4. Clamp block; 41. Driving member 1; 42. Gear; 5. Clamping member; 51. Main clamping plate; 511. Arc groove; 52. Auxiliary clamping plate; 521. Arc part; 522. Rack; 523. Guide rod; 6. Guide cylinder; 61. Spiral groove; 62. Connecting sleeve; 63. Driving member 2; 6 4. Telescopic part 2; 7. Fixed ring; 71. Circular ring groove; 8. External expansion module; 81. Guide block 1; 82. Guide block 2; 9. Inner clamp assembly; 91. Fixed block; 92. Linkage member; 93. Inner clamp plate; 10. Telescopic part 3; 11. Telescopic part 4; 12. Stabilizing assembly; 121. Bending plate; 122. Support plate; 123. Extension part; 124. Baffle; 13. Stretching mold; 14. Inner mold assembly. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0041] like Figure 1-Figure 7 As shown, an aluminum tube length stretching device includes a traction chain rail 1, a clamp 2, a stretching die 13 and an inner die assembly 14, and the device also includes:

[0042] The guide cylinder 6 and the clamp 2 are installed on the traction platform 21. The traction platform 21 is equipped with a telescopic member 3 10. The output end of the telescopic member 3 10 is provided with a guide cylinder 6. The aluminum tube body 3 is sleeved outside the guide cylinder 6.

[0043] A fixing ring 7 is fixed on the traction platform 21;

[0044] The expansion module 8 is L-shaped, and the side and bottom of the expansion module 8 are respectively provided with a guide block 1 81 and a guide block 2 82, a circular groove 71 is provided on the fixing ring 7, and the guide block 1 81 is sleeved in the circular groove 71, and a spiral groove 61 is provided on the periphery of the guide cylinder 6, and the guide block 2 82 is sleeved in the spiral groove 61, and the expansion module 8 is abutted against the end of the aluminum tube body 3, and the abutting part of the expansion module 8 and the end of the aluminum tube body 3 is in an arc shape, and the end of the aluminum tube body 3 forms an expansion portion 31;

[0045] A clamping block 4, both movable ends of the clamp 2 are connected with a clamping block 4;

[0046] Clamping parts 5 are installed on the opposite surfaces of the two clamping blocks 4. The clamping parts 5 are used to clamp the outer surface of the aluminum tube body 3. The clamping parts 5 are against the outer expansion part 31 of the aluminum tube body 3;

[0047] Inner clamping assembly 9: An inner clamping assembly 9 is installed at one end of the guide cylinder 6, and the inner clamping assembly 9 is against the inner wall of the aluminum tube body 3.

[0048] In one case of this embodiment, a telescopic part 22 is installed on the clamp 2. The telescopic part 22 can be a bidirectional cylinder or a component that can drive the clamp 2 to move crosswise; the telescopic part 10 can be a cylinder or other components that can be telescopically adjusted; the number of turns of the spiral groove 61 is greater than one circle, so that the outward expansion module 8 can make a complete rotation around the annular groove 71.

[0049] In actual application of this embodiment, the traction platform 21 drives the clamp 2 to move to the stretching die 13, and the aluminum tube body 3 passing through the stretching die 13 is sleeved outside the guide cylinder 6, and the end of the aluminum tube body 3 is against the arc surface of the external expansion module 8. At this time, the clamp 2 is rotated crosswise by the telescopic member 1 22, so that the two clamping blocks 4 drive the clamping members 5 on both sides to clamp the surface of the aluminum tube body 3, and then the telescopic member 3 10 is contracted to drive the guide cylinder 6 to move outward from the aluminum tube body 3. At this time, the external expansion module 8 moves along the spiral groove 61, so that the external expansion module 8 rotates along the annular groove 71 on the fixing ring 7, and at the same time, the aluminum tube body 3 continues to move toward the external expansion module 8. Since the aluminum tube body 3 has been preheated, the aluminum tube body 3 itself has strong plasticity, so that the external expansion module 8 can be easily moved. The expansion module 8 squeezes the end of the aluminum tube body 3 outward to form an outward expansion portion 31, so that when the aluminum tube body 3 is clamped, the outward expansion module 8 abuts against the inner side of the outward expansion portion 31 on the aluminum tube body 3, and the clamping member 5 abuts against the outer side of the outward expansion portion 31. The aluminum tube body 3 is clamped by clamping the outward expansion portion 31, so that the cross-sectional direction (longitudinal direction) of the aluminum tube body 3 can be clamped. Compared with the clamping head clamping the surface of the aluminum tube body 3 (horizontal clamping) in the prior art, clamping the outward expansion portion 31 can reduce the wear of the clamping member 5 in the horizontal direction, thereby effectively avoiding the reduction of the clamping ability of the clamping member 5, improving the stability of the aluminum tube body 3 during stretching, avoiding affecting the quality of the aluminum tube body 3 after stretching, and the end of the aluminum tube body 3 is not easily subject to irreversible damage;

[0050] The outward expansion portion 31 is clamped by the outward expansion module 8 and the clamping member 5, and the clamping member 5 and the inner clamping assembly 9 clamp the surface and inner wall of the aluminum tube body 3, so that the aluminum tube body 3 is firmly clamped during stretching, ensuring the stability of the aluminum tube body 3 during stretching, thereby avoiding affecting the quality of the aluminum tube body 3 after stretching; at the same time, after the aluminum tube body 3 is firmly clamped, the clamping member 5 is not easy to wear, thereby effectively avoiding the reduction of the clamping ability of the clamping member 5.

[0051] Furthermore, the clamping member 5 includes a main clamping plate 51 and a secondary clamping plate 52, the main clamping plate 51 is connected to the secondary clamping plate 52, the secondary clamping plate 52 is close to the end of the aluminum tube body 3, and the inner side of the secondary clamping plate 52 close to the end of the aluminum tube body 3 is provided with an arc portion 521, and the arc portion 521 is against the arc surface of the outward expansion portion 31.

[0052] In actual application of this embodiment, the arc portion 521 on the auxiliary clamping plate 52 and the outward expansion portion 31 abut against each other, so that the auxiliary clamping plate 52 and the outward expansion module 8 can firmly clamp the outward expansion portion 31, thereby further improving the stability of the aluminum tube body 3 during stretching, effectively avoiding the wear of the clamping surfaces of the main clamping plate 51 and the auxiliary clamping plate 52, and effectively avoiding the reduction of the clamping capacity of the clamping member 5;

[0053] The main clamping plate 51 and the auxiliary clamping plate 52 clamp the aluminum tube body 3 at intervals, which increases the points of force when clamping the aluminum tube body 3, so that the aluminum tube body 3 is clamped firmly, improves the stability of the aluminum tube body 3 during stretching, and effectively avoids wear of the clamping surfaces of the main clamping plate 51 and the auxiliary clamping plate 52, thereby effectively avoiding a decrease in the clamping ability of the clamping member 5.

[0054] Furthermore, the inner clip assembly 9 comprises:

[0055] The fixing block 91, the guide cylinder 6 is rotatably mounted with a connecting sleeve 62, the inner cavity of the guide cylinder 6 is mounted with a second driving member 63, the output end of the second driving member 63 is mounted with a second telescopic member 64, and the output end of the second telescopic member 64 passes through the connecting sleeve 62 and is connected to the fixing block 91;

[0056] Linkage parts 92, a plurality of linkage parts 92 are installed on the periphery of the connection sleeve 62;

[0057] Inner clamping plate 93: An inner clamping plate 93 is installed on the linkage member 92, and the inner clamping plate 93 abuts against the inner wall of the aluminum tube body 3.

[0058] In one case of the present embodiment, the driving member 2 63 may be a motor or other components capable of driving the telescopic member 2 64 to rotate; the telescopic member 2 64 may be a cylinder or other components capable of driving the fixed block 91 to telescopically move in the horizontal direction; the linkage member 92 may be two sections of movably connected movable rods, one movable rod is movably connected to the connecting sleeve 62, and the other movable rod is movably connected to the inner clamping plate 93.

[0059] In actual application of this embodiment, when the outward expansion portion 31 is formed at the end of the aluminum tube body 3, the telescopic member 64 is extended to move the fixed block 91 toward the connecting sleeve 62, so that the plurality of linkage members 92 drive the plurality of inner clamping plates 93 to press against the inner wall of the aluminum tube body 3, and cooperate with the clamping member 5 to clamp the surface of the aluminum tube body 3, thereby further improving the stability of the aluminum tube body 3 during stretching, thereby effectively avoiding wear of the clamping surfaces of the main clamping plate 51 and the auxiliary clamping plate 52, and effectively avoiding a decrease in the clamping capacity of the clamping member 5.

[0060] like Figure 2 and Figure 7 As shown, the two movable ends of the clamp 2 are both installed with telescopic parts 11, and the output ends of the telescopic parts 11 are connected to the clamping block 4.

[0061] A driving member 41 is installed in the clamping block 4, and a gear 42 is provided at the output end of the driving member 41. An arc-shaped rack 522 is provided on the outer side of the auxiliary clamping plate 52, and the rack 522 is meshed with the gear 42. A guide rod 523 is provided on the side of the auxiliary clamping plate 52 close to the main clamping plate 51, and an arc groove 511 is opened on the side of the main clamping plate 51 close to the auxiliary clamping plate 52. The guide rod 523 is sleeved in the arc groove 511, and the two guide rods 523 are symmetrical around the center axis of the aluminum tube body 3.

[0062] It should be noted that since the end of the aluminum tube body 3 forms an outward expansion portion 31, when the aluminum tube body 3 is stretched, the outward expansion portion 31 at its end cannot form a cylindrical battery shell of normal specifications and needs to be cut, which will cause a waste of material. Based on this problem, a corresponding structure is set to repair the outward expansion portion 31.

[0063] In one case of this embodiment, the telescopic member 11 may be a cylinder or other components capable of driving the clamp 4 to telescope and move; the driving member 41 may be a motor or other components capable of driving the gear 42 to rotate.

[0064] In actual application of this embodiment, after the aluminum tube body 3 is stretched, the telescopic member 2 64 is contracted to make the plurality of linkage members 92 drive the plurality of inner clamping plates 93 away from the inner wall of the aluminum tube body 3, and then the telescopic member 4 11 is extended to make the outer expansion portion 31 of the aluminum tube body 3 away from the outer expansion module 8, and at the same time, the telescopic member 3 10 is contracted to make the plurality of inner clamping plates 93 move to the outer expansion portion 31, and then the telescopic member 2 64 is used to make the plurality of inner clamping plates 93 abut against the inner wall of the aluminum tube body 3 and be located at the outer expansion portion 31, and finally, the two driving members 1 41 are used to make the two gears 42 rotate, and the rotation of the two gears 42 is The two gears 42 and the two racks 522 drive the auxiliary clamps 52 on both sides to rotate around the surface of the aluminum tube body 3. The two auxiliary clamps 52 have the same rotation direction. When the two auxiliary clamps 52 are rotated, the two auxiliary clamps 52 reciprocate, so that the two auxiliary clamps 52 repair the outer expansion part 31, so that the size of the outer expansion part 31 slowly becomes the size of the aluminum tube body 3, and then the end of the aluminum tube body 3 can form a cylindrical battery shell of normal specifications. There is no need to cut the end of the aluminum tube body 3 in subsequent use, so as not to cause waste of materials and save processing costs;

[0065] When the two auxiliary clamps 52 are reciprocated to repair and restore the outer expansion part 31, the two auxiliary clamps 52 may not be able to repair the outermost part of the outer expansion part 31. At this time, the telescopic member 12 is contracted to move the two clamps 2 away from each other, so that the two clamping members 5 are away from the aluminum tube body 3, and then the telescopic member 10 is extended to make the inner clamp assembly 9 drive the aluminum tube body 3 to move in the direction away from the outer expansion module 8, so that the outer expansion part 31 moves to a position where the two auxiliary clamps 52 can be repaired, that is, the outer expansion part 31 moves to a position between the two auxiliary clamps 52. At this time, the telescopic member 12 is extended to make the two clamps 2 close to each other, so that the two clamping members 5 clamp the aluminum tube body 3, and then the two auxiliary clamps 52 are reciprocated to repair the outer expansion part 31 by the two driving members 141 until the size of the outer expansion part 31 is the same as that of the aluminum tube body 3; in this way, the size of the outer expansion part 31 can be completely repaired to the same size as the aluminum tube body 3, thereby avoiding the subsequent cutting of the outer expansion part 31, which causes waste of materials;

[0066] When the two auxiliary clamps 52 are repairing the expansion part 31, a number of inner clamps 93 are against the inner wall of the aluminum tube body 3, and at the expansion part 31, so that the inner diameter of the repaired expansion part 31 can be the same as the inner diameter of the aluminum tube body 3, so that the inner and outer dimensions of the expansion part 31 after repair are the same as the inner and outer dimensions of the aluminum tube body 3, so that the end of the aluminum tube body 3 can form a cylindrical battery shell of normal specifications, and there is no need to cut the end of the aluminum tube body 3 in subsequent use, thereby avoiding waste of materials.

[0067] like Figure 1 and Figure 8 As shown, a stabilizing assembly 12 is installed on the traction chain rail 1, and the stabilizing assembly 12 includes:

[0068] Bending plates 121, the two track surfaces of the traction chain track 1 are elastically rotatably mounted with bending plates 121, and the two bending plates 121 always tend to approach each other;

[0069] Support plate 122, the bent portion of the bent plate 121 is provided with a support plate 122, and two support plates 122 are clamped on the surface of the aluminum tube body 3;

[0070] The extension part 123 is provided at the movable end of the curved plate 121 , and the two track surfaces of the traction chain rail 1 are both provided with a baffle 124 , which blocks the extension part 123 to prevent the extension part 123 from moving to a position between the two track surfaces.

[0071] It should be noted that when the expansion portion 31 is repaired, the aluminum tube body 3 as a whole may shake, which may cause the aluminum tube body 3 to bend, thereby reducing the overall quality of the aluminum tube body 3 after stretching; based on this problem, a stabilizing component 12 is provided to keep the aluminum tube body 3 in a stable state.

[0072] In one aspect of this embodiment, a torsion spring is provided at the rotating portion of the bending plate 121, so that the two bending plates 121 always tend to approach each other.

[0073] In actual application of this embodiment, the two bending plates 121 are close to each other so that the two supporting plates 122 clamp the surface of the aluminum tube body 3, and the clamping member 5 and the inner clamping assembly 9 clamp the aluminum tube body 3, thereby effectively preventing the aluminum tube body 3 from shaking when the outer expansion portion 31 is repaired, effectively preventing the aluminum tube body 3 from bending, and avoiding affecting the overall quality of the aluminum tube body 3 after stretching;

[0074] When the traction platform 21 moves, the traction platform 21 will contact the curved portion of the curved plate 121 , so that the two curved plates 121 move in opposite directions, thereby preventing the two curved plates 121 from pressing against the traction platform 21 and moving normally.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An aluminum tube length stretching device, comprising a traction chain rail (1), a clamp (2), a stretching die (13) and an inner die assembly (14), characterized in that: The device also includes: The guide cylinder (6) is installed on the traction platform (21), the traction platform (21) is equipped with a telescopic member 3 (10), the output end of the telescopic member 3 (10) is provided with a guide cylinder (6), and the aluminum tube body (3) is sleeved outside the guide cylinder (6); A fixing ring (7), wherein the fixing ring (7) is fixed on the traction platform (21); An expansion module (8), the expansion module (8) is L-shaped, the side and bottom of the expansion module (8) are respectively provided with a guide block 1 (81) and a guide block 2 (82), the fixing ring (7) is provided with a circular groove (71), the guide block 1 (81) is sleeved in the circular groove (71), the outer periphery of the guide cylinder (6) is provided with a spiral groove (61), the guide block 2 (82) is sleeved in the spiral groove (61), the expansion module (8) abuts against the end of the aluminum tube body (3), the abutting portion of the expansion module (8) and the end of the aluminum tube body (3) is in an arc shape, and the end of the aluminum tube body (3) forms an expansion portion (31); A clamping block (4), wherein both movable ends of the clamp (2) are connected to the clamping block (4); A clamping member (5), wherein the two clamping blocks (4) are each provided with a clamping member (5) on opposite surfaces thereof, wherein the clamping member (5) is used to clamp the outer surface of the aluminum tube body (3), and the clamping member (5) abuts against the outwardly expanded portion (31) of the aluminum tube body (3); An inner clamping assembly (9) is installed at one end of the guide cylinder (6), and the inner clamping assembly (9) is against the inner wall of the aluminum tube body (3).

2. The aluminum tube length stretching device according to claim 1, characterized in that: The clamping member (5) comprises a main clamping plate (51) and a secondary clamping plate (52), wherein the main clamping plate (51) is connected to the secondary clamping plate (52), wherein the secondary clamping plate (52) is close to the end of the aluminum tube body (3), and an arc portion (521) is provided on the inner side of one side of the secondary clamping plate (52) close to the end of the aluminum tube body (3), wherein the arc portion (521) abuts against the arc surface of the outward expansion portion (31).

3. The aluminum tube length stretching device according to claim 1, characterized in that: The inner clamp assembly (9) comprises: A fixed block (91), a connecting sleeve (62) is rotatably mounted on the guide cylinder (6), a second driving member (63) is mounted in the inner cavity of the guide cylinder (6), a second telescopic member (64) is mounted on the output end of the second driving member (63), and the output end of the second telescopic member (64) passes through the connecting sleeve (62) and is connected to the fixed block (91); Linkage parts (92), a plurality of linkage parts (92) are installed on the periphery of the connection sleeve (62); An inner clamping plate (93) is installed on the linkage member (92), and the inner clamping plate (93) abuts against the inner wall of the aluminum tube body (3).

4. The aluminum tube length stretching device according to claim 2, characterized in that: Both movable ends of the clamp (2) are equipped with telescopic parts four (11), and the output end of the telescopic parts four (11) is connected to the clamp block (4).

5. The aluminum tube length stretching device according to claim 4, characterized in that: A driving member (41) is installed in the clamping block (4), and a gear (42) is provided at the output end of the driving member (41). A circular arc-shaped rack (522) is provided on the outer side of the auxiliary clamping plate (52), and the rack (522) and the gear (42) are meshed with each other. A guide rod (523) is provided on the side of the auxiliary clamping plate (52) close to the main clamping plate (51), and an arc groove (511) is provided on the side of the main clamping plate (51) close to the auxiliary clamping plate (52). The guide rod (523) is sleeved in the arc groove (511), and the two guide rods (523) are symmetrical around the central axis of the aluminum tube body (3).

6. The aluminum tube length stretching device according to claim 1, characterized in that: A stabilizing component (12) is installed on the traction chain rail (1), and the stabilizing component (12) comprises: A curved plate (121), wherein the curved plates (121) are elastically rotatably mounted on the two track surfaces of the traction chain track (1), and the two curved plates (121) always tend to approach each other; A support plate (122), the bent portion of the bent plate (121) is provided with a support plate (122), and two support plates (122) are clamped on the surface of the aluminum tube body (3); An extension part (123), the movable end of the curved plate (121) is provided with the extension part (123), and the two track surfaces of the traction chain rail (1) are both provided with a baffle (124), and the baffle (124) blocks the extension part (123) to prevent the extension part (123) from moving to a position between the two track surfaces.

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