Clamp and tool for local straightening of profiled sections

Abstract

This invention relates to a fixture and tooling for partial straightening of profiles, comprising a mounting base with a clamping part having multiple clamping surfaces that can be relatively converged or expanded, the multiple clamping surfaces collectively forming a clamping hole for clamping or releasing the profile; the mounting base also has a first driving part for driving the clamping part to rotate in a first direction to tilt, thereby applying a reverse bending moment to the clamped profile, or driving the clamping part in the tilted state to rotate in a second direction opposite to the first direction and return to its original position. The defective section on the profile is divided into multiple areas to be straightened, and the clamping part is driven to rotate by the first driving part to perform straightening operations on the areas to be straightened by bending moment. In this process, the profile is gradually straightened by performing multiple straightening operations on multiple local areas, reducing the risk of introducing new warping or internal stress due to repeated bending of the qualified sections on the profile.

Description

Technical Field

[0001] This invention relates to the field of profile processing technology, specifically to a fixture and tooling for partial straightening of profiles. Background Technology

[0002] Profiles, typically slender cross-section structures made of metals (such as aluminum alloys) or polymer materials (such as fiber-reinforced composites), are widely used in aerospace, rail transportation, and architectural decoration. During the production and processing of profiles, after extrusion, rolling, drawing, or injection molding, uneven distribution of internal residual stress, differences in cooling shrinkage, or release of thermal stress during subsequent heat treatment often result in localized bending or warping deformation along the length direction.

[0003] Especially for profiles formed under specific process parameters, warping occurs only in a single direction, for example, upward warping along their length. This is specifically affected by the following factors: Material factors: Some materials with significant anisotropy (such as fiber-reinforced composites) experience cooling shrinkage stress mainly released along a certain principal axis due to the influence of fiber layup direction or crystal orientation, causing the profile to warp towards the side with lower cross-sectional stiffness.

[0004] Thickness and width factors: For thin-walled profiles with a large width-to-thickness ratio, the flow stress and cooling rate of the wide and narrow sides during the forming process are very different, which makes the residual stress unevenly distributed along the width direction, thus causing the profile to bend and deform towards the wide side or the narrow side.

[0005] Temperature factors: During continuous extrusion or online heat treatment, if the cooling medium (such as air or water mist) can only be applied in one direction or there is an asymmetrical temperature field, the different surfaces of the profile will experience different heat changes. For example, if the upper surface cools faster and the lower surface cools slower, the profile will inevitably warp unidirectionally towards the side that cools faster (and shrinks more).

[0006] For profiles that warp in a single direction, straightening is typically performed. Roller straighteners are widely used in existing technologies for this purpose. These straighteners employ multiple sets of alternately arranged straightening rollers to repeatedly bend the profile along its entire length to eliminate curvature. However, because roller straighteners cannot straighten only localized warped sections, their roller arrays must cover and act on the entire length of the profile. For profiles with only localized warping, the straightener, while correcting the defective section, can easily force already straight and dimensionally corrected sections to undergo multiple elastoplastic bends. This process can introduce new warping into acceptable sections, reducing the product's yield rate. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a fixture and tooling for partial straightening of profiles, so as to solve the problem that in the prior art, while straightening the defective section, the straightening machine easily forces the originally straight and dimensionally qualified section to undergo multiple elastic-plastic bending. This process can easily introduce new warping into the qualified section and reduce the product qualification rate.

[0008] This invention is achieved through the following technical solution: A clamp for partial straightening of profiles includes a mounting base, on which a clamping part is provided. The clamping part has multiple clamping surfaces that can be relatively converged or expanded, and the multiple clamping surfaces together form a clamping hole for clamping or releasing the profile. The mounting base is also provided with a first driving part, which is used to drive the clamping part to rotate to an inclined position in a first direction so as to apply a reverse bending torque to a local part of the clamped profile, or to drive the clamping part in the inclined position to rotate to a second direction opposite to the first direction and reset.

[0009] Furthermore, the clamping part includes a mounting frame rotatably connected to the mounting base, a first clamping member, a second clamping member, a first connecting rod, a second connecting rod, and a second driving part; The mounting frame is rotatably connected to the mounting base, and the first connecting rod and the second connecting rod are both slidably connected to the mounting frame. Both the first connecting rod and the second connecting rod can slide along the height direction of the mounting frame. The second driving part is disposed on the mounting frame and is used to drive the first connecting rod and the second connecting rod to slide in opposite directions. The first link and the second link are respectively connected to the first clamping member and the second clamping member. The first clamping member and the second clamping member are both located within the mounting frame. The first clamping member and the second clamping member are vertically opposite each other. The first clamping member and the second clamping member each have at least one clamping surface.

[0010] Furthermore, the second drive unit includes a first lever, a second lever, two first movable blocks, two traction rods, a second movable block, and a push-pull rod; The push-pull rod extends along the length of the mounting frame, slides with the mounting base, and can slide along the length of the mounting frame. One end of the push-pull rod is rotatably connected to the piston rod of a hydraulic cylinder, and the other end is connected to the second movable block. The hydraulic cylinder is connected to the mounting base. The two traction rods are respectively rotatably connected at their close ends to the upper and lower ends of the second movable block, and respectively rotatably connected at their far ends to the close ends of the two first movable blocks. The two first movable blocks are slidably engaged with one side of the mounting frame, and both first movable blocks can slide along the height direction of the mounting frame. The two far ends of the two first movable blocks are respectively movably connected to one end of the first lever and the second lever. The other ends of the first lever and the second lever are respectively movably connected to the upper end of the first connecting rod and the lower end of the second connecting rod. The middle of the first lever and the second lever are respectively rotatably connected to the top and bottom surfaces of the mounting frame.

[0011] Furthermore, both ends of the first lever and the second lever are provided with a first groove and a second groove, and a first slider and a second slider are slidably fitted in the first groove and the second groove. The two first sliders are respectively connected to the upper end of the first connecting rod and the lower end of the second connecting rod, and the two second sliders are respectively connected to the ends of the two first movable blocks that are far apart from each other.

[0012] Furthermore, the first drive unit includes a first motor, a coupling, an external gear ring, and a drive gear that are rotatably connected to the mounting base; The first motor is mounted on a mounting base. The drive gear is coaxially connected to the output end of the first motor. The drive gear meshes with an external gear ring. The external gear ring is sleeved on a coupling. A groove extending axially is provided on the inner circular surface of the external gear ring. A retaining tooth is slidably fitted in the groove. The retaining tooth is connected to the outer circular surface of the coupling. The coupling is coaxially connected to the push-pull rod.

[0013] A tooling for partial straightening of irregular profiles includes a clamp for partial straightening of irregular profiles, and also includes a base and a first displacement unit; Both mounting seats are slidably engaged with the first displacement unit, and the two mounting seats can slide horizontally. The first displacement unit is used to drive the two mounting seats to slide in opposite directions. It also includes an auxiliary fixing unit and a second displacement unit that are spaced apart from the clamps used for local straightening of profiles; The first displacement unit is disposed on the second displacement unit, and the second displacement unit is used to drive the first displacement unit to slide in a direction closer to or further away from the auxiliary fixing unit, so as to adjust the distance between the mounting base and the auxiliary fixing unit.

[0014] Furthermore, the mounting frame includes two half-frames, the open ends of the two half-frames abutting each other to form a frame structure, and the two half-frames are respectively mounted on two mounting bases; The first clamping member includes two first clamping blocks arranged at intervals along the length of the mounting frame, and the two first clamping blocks are respectively connected to the lower ends of the two first connecting rods; The second clamping member includes two second clamping blocks arranged at intervals along the length of the mounting frame, and the two second clamping blocks are respectively connected to the upper ends of the two second connecting rods; The two first clamping blocks have their opposite sides in contact, the two second clamping blocks have their opposite sides in contact, the two first clamping blocks and the two second clamping blocks are vertically opposite each other, the bottom surface of each first clamping block is in contact with the top surface of the corresponding second clamping block, and the two first clamping blocks and the two second clamping blocks together form a clamping hole.

[0015] Furthermore, the first displacement unit includes a first mounting bracket, a bidirectional lead screw, two lead screw nuts, and a second motor; The bidirectional lead screw is rotatably connected to the first mounting bracket, and the two lead screw nuts are respectively sleeved on the two sections of threads on the bidirectional lead screw, and the two lead screw nuts are respectively connected to the bottom surfaces of the two mounting seats. The first mounting bracket is provided with a first guide rail extending along its length, and both mounting seats are slidably engaged with the first guide rail.

[0016] Furthermore, two second displacement units are provided along the length direction of the first mounting frame, and each of the two second displacement units includes a second mounting frame, two synchronous gears, a synchronous toothed belt, and a third motor; The synchronous toothed belt is sleeved on two synchronous gears and meshes with the two synchronous gears. The two synchronous gears are rotatably connected to both ends of the second mounting frame, and one of the synchronous gears is coaxially connected to the output end of the third motor. The third motor is connected to the second mounting frame. The base has a toothed portion that meshes with the toothed surface of the synchronous toothed belt; the second mounting bracket is provided with a second guide rail extending along its length, and the base and the second guide rail are slidably engaged.

[0017] Furthermore, the structure of the auxiliary fixing unit is the same as that of the clamp for local straightening of profiles.

[0018] The beneficial effects of this invention are as follows: This invention relates to a fixture and tooling for partial straightening of profiled materials. It divides defective sections on the profile into multiple areas to be straightened, and a first driving unit drives a clamping unit to rotate, thereby straightening the areas through bending moment. In this process, the profile is gradually straightened by performing multiple straightening operations on multiple local areas, reducing the risk of introducing new warping or internal stress due to repeated bending of acceptable sections on the profile.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the clamp for partial straightening of profiles according to the present invention; Figure 2 This is a schematic diagram of the connection between the semi-frame and the mounting base of the present invention; Figure 3 This is a schematic diagram of the structure of the first driving unit and the second driving unit of the present invention; Figure 4 This is a schematic diagram of the coupling and external gear ring of the present invention; Figure 5 This is a partial structural diagram of the present invention; Figure 6 This is a schematic diagram of the structure of the first clamping member and the second clamping member of the present invention; Figure 7 This is a schematic diagram of the tooling for partial straightening of profiles according to the present invention; Figure 8 This is a schematic diagram of the fixture for partial straightening of profiles, the first displacement unit, and the second displacement unit of the present invention; Figure 9 This is a schematic diagram of the fixture for local straightening of profiles and the first displacement unit of the present invention; Figure 10 This is a schematic diagram of the structure of the first displacement unit and the second displacement unit of the present invention.

[0021] In the picture: 1. Mounting base; 2. First drive unit; 201. First motor; 202. Coupling; 2021. Gear; 203. External gear ring; 2031. Slot; 204. Drive gear; 3. Mounting frame; 301. Half frame; 4. First clamping member; 401. First clamping block; 5. Second clamping member; 501. Second clamping block; 6. First connecting rod; 7. Second connecting rod; 8. Second drive unit; 801. First lever; 802. Second lever; 803. First movable block; 804. Traction rod; 805. Second movable block 806. Moving block; 9. Push-pull rod; 10. Hydraulic cylinder; 11. First slide groove; 12. First slider; 13. Second slide groove; 14. Second slider; 15. Base; 16. First displacement unit; 17. First mounting bracket; 18. Double-acting lead screw; 19. Lead screw nut; 10. Second motor; 11. Second displacement unit; 12. Second mounting bracket; 13. Synchronous gear; 14. Synchronous toothed belt; 15. Third motor; 16. First guide rail; 17. Second guide rail. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0027] Please see Figure 1-10 The present invention provides a technical solution: a clamp for local straightening of profiles, including a mounting base 1, wherein the mounting base 1 is provided with a clamping part, the clamping part having multiple clamping surfaces that can be relatively gathered or expanded, and the multiple clamping surfaces together enclose a clamping hole for clamping or releasing the profile. The mounting base 1 is also provided with a first driving part 2, which is used to drive the clamping part to rotate to an inclined position in a first direction to apply a reverse bending torque to a local part of the clamped profile, or to drive the clamping part in the inclined state to rotate to a second direction opposite to the first direction and reset.

[0028] In this solution, the profile can be conveyed by a conveying structure. During conveying, the conveying structure and the clamping part cooperate to form two support points on the profile.

[0029] There are two mounting bases 1 arranged opposite each other, and the clamping part is located between the two mounting bases 1. The stability of the clamping part is enhanced by the support of the two mounting bases 1.

[0030] In practical use, the clamping part on the mounting base 1 can adjust multiple clamping surfaces so that the multiple clamping surfaces can converge in a relatively close direction or expand in a relatively far direction. As the multiple clamping surfaces converge or expand relative to each other, the diameter of the clamping hole decreases or increases to clamp or contact the profile, facilitating the displacement of the profile for loading and unloading.

[0031] Adjust multiple clamping surfaces to increase the diameter of the clamping hole so that the profile can be placed into the clamping hole. After the profile is placed into the clamping hole, adjust multiple clamping surfaces to reduce the diameter of the clamping hole so that the multiple clamping surfaces fit against the outer wall of a local section of the profile to form a clamp.

[0032] Furthermore, during the straightening operation of profiles, the clamping unit typically works in conjunction with existing conveying equipment on the profile production line (such as multiple sets of freely rotating idlers, conveyor rollers, or fixed support frames). During straightening, one end or another section of the rotating profile is fixed by an auxiliary fixing unit, forming the first fulcrum; the rotating clamping unit clamps the area of ​​the profile to be straightened, forming the second fulcrum. The first driving unit drives the clamping unit to rotate and tilt, thereby generating a reverse bending moment between the two fulcrums.

[0033] Before the straightening operation, the defective section is divided into multiple areas to be straightened. That is, in a single straightening operation, only one area to be straightened on the profile is processed. After processing the area to be straightened, the profile is moved in one direction (left or right) to straighten another area to be straightened, and this process is repeated.

[0034] Specific usage steps: Step 1: Adjust the profile so that the area to be straightened is located at the work station (between the first and second fulcrums), and clamp the profile by using a clamping device. Step Two: The first drive unit 2 is activated, driving the entire clamping unit to rotate around a certain axis in a first direction (adapting to the warping direction of the profile, such as clockwise) and generate a specific tilt angle. This rotation and tilting action, in coordination with the first and second fulcrums, applies a precise reverse bending moment to the area of ​​the clamped profile to be straightened. The direction of this moment is opposite to the original warping deformation direction of the profile (e.g., if it was originally warped upwards, then a downward bending moment is applied), thereby releasing or redistributing residual stress and achieving straightening.

[0035] Step 3: Increase the clamping hole to release the profile. At this time, there is a gap between the profile and multiple clamping surfaces. The first driving part 2 can drive the clamping part to rotate in the opposite second direction (such as counterclockwise) and reset. After losing clamping, the profile moves to another area to be straightened to the work station and performs Step 1 again.

[0036] Compared to existing technologies, the profile straightening fixture of this invention divides the defective section of the profile into multiple areas to be straightened, and drives the clamping part to rotate through the first driving part 2 to straighten the areas to be straightened by bending moment. In this process, the profile is gradually straightened by performing multiple straightening operations on multiple local areas, reducing the risk of introducing new warping or internal stress due to repeated bending of the qualified sections of the profile.

[0037] In this embodiment, the clamping part includes a mounting frame 3 rotatably connected to the mounting base 1, a first clamping member 4, a second clamping member 5, a first connecting rod 6, a second connecting rod 7, and a second driving part 8; The mounting frame 3 is rotatably connected to the mounting base 1. The first connecting rod 6 and the second connecting rod 7 are both slidably connected to the mounting frame 3. The first connecting rod 6 and the second connecting rod 7 can slide along the height direction of the mounting frame 3. The second driving part 8 is disposed on the mounting frame 3 and is used to drive the first connecting rod 6 and the second connecting rod 7 to slide in opposite directions. The first connecting rod 6 and the second connecting rod 7 are respectively connected to the first clamping member 4 and the second clamping member 5. The first clamping member 4 and the second clamping member 5 are both located within the mounting frame 3. The first clamping member 4 and the second clamping member 5 are opposite each other, and each of the first clamping member 4 and the second clamping member 5 has at least one clamping surface.

[0038] In this design, the load-bearing structure of the entire clamping part of the mounting frame 3 is rotatably connected to the mounting base 1 to achieve overall rotation and tilting of the clamping part of the first drive part 2.

[0039] Multiple clamping surfaces are located on the first clamping member 4 and the second clamping member 5. The relative movement of the first clamping member 4 and the second clamping member 5 adjusts the relative proximity or distance of the multiple clamping surfaces. The first clamping member 4 and the second clamping member 5 are slidably engaged with the mounting frame 3 via the first connecting rod 6 and the second connecting rod 7, respectively. Specifically, the first connecting rod 6 and the second connecting rod 7 are slidably engaged with the mounting frame 3 and can only slide along the height direction of the mounting frame 3, thereby limiting the movement of the first clamping member 4 and the second clamping member 5, ensuring that the first clamping member 4 and the second clamping member 5 can only slide along the height direction of the mounting frame 3.

[0040] In practical use, the second drive unit 8 can drive the device to achieve the following two states: State 1: The first connecting rod 6 drives the first clamping member 4 to slide downward, while the second connecting rod 7 drives the second clamping member 5 to slide upward. At this time, multiple clamping surfaces are relatively gathered together, and the clamping holes are reduced to clamp the profile. State 2: The first link 6 drives the first clamping member 4 to slide upward; at the same time, the second link 7 drives the second clamping member 5 to slide downward. At this time, the multiple clamping surfaces expand relative to each other, and the clamping holes increase in size for the movement of profiles.

[0041] In this embodiment, the second drive unit 8 includes a first lever 801, a second lever 802, two first movable blocks 803, two traction rods 804, a second movable block 805, and a push-pull rod 806; The push-pull rod 806 extends along the length of the mounting frame 3. The push-pull rod 806 is slidably engaged with the mounting base 1. The push-pull rod 806 can slide along the length of the mounting frame 3. One end of the push-pull rod 806 is rotatably connected to the piston rod of a hydraulic cylinder 9, and the other end is connected to the second movable block 805. The hydraulic cylinder 9 is connected to the mounting base 1. The two traction rods 804 are rotatably connected at their close ends to the upper and lower ends of the second movable block 805, respectively. The two traction rods 804 are rotatably connected at their far ends to the close ends of the two first movable blocks 803, respectively. The two first movable blocks 803 are slidably engaged with one side of the mounting frame 3. Both first movable blocks 803 can slide along the height direction of the mounting frame 3. The far ends of the two first movable blocks 803 are movably connected to one end of the first lever 801 and the second lever 802, respectively. The other ends of the first lever 801 and the second lever 802 are movably connected to the upper end of the first connecting rod 6 and the lower end of the second connecting rod 7, respectively. The middle parts of the first lever 801 and the second lever 802 are rotatably connected to the top and bottom surfaces of the mounting frame 3, respectively.

[0042] In this design, the piston rod of the hydraulic cylinder 9 moves in a straight line and is perpendicular to the height direction of the mounting frame 3. By driving the piston rod to extend and retract, the hydraulic cylinder 9 will push or pull the push-pull rod 806 connected to it, causing the push-pull rod 806 to slide along the length direction of the mounting frame 3.

[0043] First, when the push-pull rod 806 slides, it will drive the second movable block 805 connected to it to move. The second movable block 805 converts the horizontal push-pull force into the opposite vertical movement of the two first movable blocks 803 through two traction rods 804 rotatably connected at its upper and lower ends (for example, when the push-pull rod 806 is pushed, the two first movable blocks 803 move away from each other; when the push-pull rod 806 is pulled, the two first movable blocks 803 move closer to each other).

[0044] Subsequently, when the two first movable blocks 803 move relative to each other, they will drive one end of the first lever 801 and the second lever 802 through the two traction rods 804 respectively. Furthermore, the first lever 801 and the second lever 802, using the rotational connection points on the top and bottom surfaces of the mounting frame 3 as fulcrums respectively, amplify the vertical motion force of the first movable block 803 and convert it into a reverse vertical motion force at the other end, thereby driving the first connecting rod 6 and the second connecting rod 7 to slide in opposite directions. This ultimately achieves the clamping or releasing of the first clamping member 4 and the second clamping member 5. During this process, the clamping force of the first clamping member 4 and the second clamping member 5 is increased through the first lever 801 and the second lever 802.

[0045] In this embodiment, both ends of the first lever 801 and the second lever 802 are provided with a first groove 10 and a second groove 11. A first slider 1001 and a second slider 1101 are slidably fitted in the first groove 10 and the second groove 11. The two first sliders 1001 are respectively connected to the upper end of the first connecting rod 6 and the lower end of the second connecting rod 7, and the two second sliders 1101 are respectively connected to the ends of the two first movable blocks 803 that are far apart from each other.

[0046] In this design, a first groove 10 and a second groove 11 are respectively provided at both ends of the first lever 801 and the second lever 802, and a first slider 1001 and a second slider 1101 that can slide in the first groove 10 and the second groove 11 respectively. When the first lever 801 and the second lever 802 rotate about the fulcrum, the first slider 1001 and the second slider 1101 slide in the first groove 10 and the second groove 11 respectively, thereby linking the rotation of the first lever 801 and the second lever 802 with the motion state of the first movable block 803, the first connecting rod 6 and the second connecting rod 7.

[0047] In this embodiment, the first drive unit 2 includes a first motor 201, a coupling 202, an external gear ring 203, and a drive gear 204 that are rotatably connected to the mounting base 1. The first motor 201 is mounted on the mounting base 1. The drive gear 204 is coaxially connected to the output end of the first motor 201. The drive gear 204 meshes with the external gear ring 203. The external gear ring 203 is sleeved on the coupling 202. A groove 2031 extending axially is provided on the inner circular surface of the external gear ring 203. A retaining tooth 2021 is slidably fitted in the groove 2031. The retaining tooth 2021 is connected to the outer circular surface of the coupling 202. The coupling 202 is coaxially connected to the push-pull rod 806.

[0048] In this design, the first motor 201 starts, and its output shaft drives the drive gear 204 to rotate. The drive gear 204 then drives the external gear ring 203, which meshes with it, to rotate. The external gear ring 203 slides with the teeth 2021 on the outer surface of the coupling 202 through a groove 2031 on its inner circular surface. Therefore, it transmits the rotational torque to the coupling 202, causing the coupling 202 to rotate synchronously and in the same direction. The coupling 202 is coaxially connected to the push-pull rod 806, thus ultimately driving the push-pull rod 806 to rotate.

[0049] Since the push-pull rod 806, the second movable block 805, the traction rod 804, the mounting frame 3 and other components are connected in sequence or as a whole, the rotation of the push-pull rod 806 will cause the entire mounting frame 3 (i.e. the entire clamping part) to rotate and tilt relative to the mounting base 1.

[0050] The external gear ring 203 and the coupling 202 are engaged by the slot 2031 and the tooth 2021. Therefore, the external gear ring 203 and the coupling 202 can rotate synchronously and in the same direction. The tooth 2021 extends along the axial direction of the external gear ring 203, so that the coupling can slide synchronously and in the same direction with the push-pull rod 806. The tooth 2021 will not disengage from the slot 2031. Therefore, the coupling 202 can move horizontally relative to the external gear ring 203.

[0051] The displacement length of coupling 202 is less than the length of clamping tooth 2021.

[0052] A tooling for partial straightening of irregular profiles includes a clamp for partial straightening of irregular profiles, a base 12 and a first displacement unit 13, wherein the first displacement unit 13 is disposed on the base 12; Both mounting bases 1 are slidably engaged with the first displacement unit 13, and the two mounting bases 1 can slide horizontally. The first displacement unit 13 is used to drive the two mounting bases 1 to slide in opposite directions. It also includes an auxiliary fixing unit and a second displacement unit 14 that are spaced apart from the clamps used for local straightening of profiles; The first displacement unit 13 is disposed on the second displacement unit 14, and the second displacement unit 14 is used to drive the first displacement unit 13 to slide in a direction closer to or further away from the auxiliary fixing unit, so as to adjust the distance between the mounting base 1 and the auxiliary fixing unit.

[0053] The mounting frame 3 includes two half-frames 301, the open ends of the two half-frames 301 abut each other to form a frame structure, and the two half-frames 301 are respectively mounted on two mounting bases 1; The first clamping member 4 includes two first clamping blocks 401 arranged at intervals along the length of the mounting frame 3, and the two first clamping blocks 401 are respectively connected to the lower ends of the two first connecting rods 6. The second clamping member 5 includes two second clamping blocks 501 arranged at intervals along the length of the mounting frame 3, and the two second clamping blocks 501 are respectively connected to the upper ends of the two second connecting rods 7; The two first clamping blocks 401 have their opposite sides in contact, and the two second clamping blocks 501 have their opposite sides in contact. The two first clamping blocks 401 and the two second clamping blocks 501 are vertically opposite each other. The bottom surface of each first clamping block 401 is in contact with the top surface of the corresponding second clamping block 501. The two first clamping blocks 401 and the two second clamping blocks 501 together form a clamping hole.

[0054] In this design, the mounting frame 3 consists of two independent half-frames 301, which are respectively mounted on two mounting seats 1 driven by the first displacement unit 13. Therefore, the first displacement unit 13 can drive the two mounting seats 1 closer together, causing the two half-frames 301 to close and form a complete mounting frame 3. Simultaneously, the first clamping block 401 and the second clamping block 501, respectively connected to the connecting rods within the two half-frames 301, will also approach and contact each other. Ultimately, the two first clamping blocks 401 (one on the left and one on the right) and the two second clamping blocks 501 (one on the left and one on the right) together form a complete, detachable clamping hole. Conversely, the two mounting seats 1 can also be driven away from each other, causing the two half-frames 301 to separate, and the two sets of first clamping blocks 401 and second clamping blocks 501 to move away from each other. This, combined with the first connecting rod 6 and the second connecting rod 7, causes multiple clamping surfaces to move away from each other, increasing the diameter of the clamping hole.

[0055] The first clamping block 401 and the second clamping block 501 are respectively connected to the first connecting rod 6 and the second connecting rod 7 by threads, so as to facilitate the loading and unloading of the first clamping block 401 and the second clamping block 501, thereby adapting to different profiles by replacing the first clamping block 401 and the second clamping block 501 with different shapes.

[0056] Secondly, the auxiliary fixing unit serves as the reaction fulcrum, and the clamping part serves as the active force application point, providing two constraint points for the straightening of profiles.

[0057] In this solution, the clamp for local straightening of the profile is responsible for holding and actively rotating and tilting it, while the auxiliary fixing unit is used to fix another section of the profile (such as the end of the profile or the straight part outside another defective section), forming a fixed reaction fulcrum that can withstand bending moments. The specific working process is as follows: Step 1: The auxiliary fixing unit fixes a selected section of the profile (e.g., the end away from the warped area). The fixing method can be a simple compression fixing or a clamping method with the same structure as the clamp used for local straightening of the profile. In this embodiment, it is preferable to use a clamping fixing method with the same structure as the clamp used for local straightening of the profile, that is, the structure of the auxiliary fixing unit is the same as that of the clamp used for local straightening of the profile.

[0058] Step 2: Drive the profile local straightening clamp to the warped defect section of the profile through the second displacement unit 14 and clamp the section.

[0059] Step 3: Between the profile section fixed by the auxiliary fixing unit and the section held by the two clamps, a defined straightening area with constraints at both ends is formed. When the first driving unit 2 drives the clamping unit to rotate and tilt, the auxiliary fixing unit provides equal and opposite reaction forces and reverse bending moments, preventing the profile from rigidly rotating as a whole with the rotation of the profile local straightening clamps. This forces all bending energy to be converted into elastoplastic bending deformation of the straightening area, achieving precise straightening.

[0060] After straightening one of the areas to be straightened, the expansion of multiple clamping surfaces is adjusted, and then the clamping part is rotated and reset. Then the second displacement unit 14 drives the profile local straightening fixture away from the auxiliary fixing unit and moves the profile, moving the other areas of the profile to be straightened between the profile local straightening fixture and the auxiliary fixing unit.

[0061] In this embodiment, the first displacement unit 13 includes a first mounting bracket 1301, a bidirectional lead screw 1302, two lead screw nuts 1303, and a second motor 1304. The bidirectional lead screw 1302 is rotatably connected to the first mounting bracket 1301, and the two lead screw nuts 1303 are respectively sleeved on the two sections of threads on the bidirectional lead screw 1302, and the two lead screw nuts 1303 are respectively connected to the bottom surfaces of the two mounting seats 1. The first mounting bracket 1301 is provided with a first guide rail 15 extending along its length direction, and both mounting seats 1 are slidably engaged with the first guide rail 15.

[0062] In this design, the bidirectional lead screw 1302 has two sections of threads with opposite directions of rotation, and each end of the thread is fitted with a lead screw nut 1303. The two lead screw nuts 1303 are connected to two mounting seats 1 by bolts, and both mounting seats 1 are slidably engaged with the first guide rail 15. This constraint of the first guide rail 15 limits the sliding of the two mounting seats 1 to the length direction of the first mounting frame 1301. Since the lead screw nuts 1303 are connected to the mounting seats 1, they can also only slide along the length direction of the first mounting frame 1301. When the second motor 1304 drives the bidirectional lead screw 1302 to rotate, the two lead screw nuts 1303, under the engagement of the two sections of threads, move in opposite directions along the axis of the bidirectional lead screw 1302, thereby causing the two mounting seats 1 to slide in opposite directions.

[0063] In this embodiment, two second displacement units 14 are provided along the length direction of the first mounting frame 1301. Each of the two second displacement units 14 includes a second mounting frame 1401, two synchronous gears 1402, a synchronous toothed belt 1403, and a third motor 1404. The synchronous toothed belt 1403 is sleeved on the two synchronous gears 1402, and the synchronous toothed belt 1403 meshes with the two synchronous gears 1402. The two synchronous gears 1402 are rotatably connected to both ends of the second mounting bracket 1401, and one of the synchronous gears 1402 is coaxially connected to the output end of the third motor 1404. The third motor 1404 is connected to the second mounting bracket 1401. The base 12 has a toothed portion that meshes with the toothed surface of the synchronous toothed belt 1403; the second mounting bracket 1401 is provided with a second guide rail 16 extending along its length direction, and the base 12 and the second guide rail 16 are slidably engaged.

[0064] In this scheme, since the two synchronous gears 1402 are connected by a synchronous toothed belt 1403, when the third motor 1404 drives one of the synchronous gears 1402 to rotate, the other synchronous gear 1402 rotates synchronously in the same direction under the transmission action of the synchronous toothed belt 1403.

[0065] When the synchronous toothed belt 1403 is driven to move in a cycle, the toothed part on the base 12 meshes with the tooth surface of the synchronous toothed belt 1403. In this way, the cooperation between the base 12 and the synchronous toothed belt 1403 drives the first mounting frame 1301 to move linearly along the length direction of the second mounting frame 1401, thereby adjusting the distance between the clamp for local straightening of profiles and the auxiliary fixing unit.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A clamp for partial straightening of irregular profiles, characterized in that: Includes a mounting base (1), on which a clamping part is provided, the clamping part having multiple clamping surfaces that can be relatively gathered or expanded, the multiple clamping surfaces together forming a clamping hole for clamping or releasing the profile. The mounting base (1) is also provided with a first driving part (2), which is used to drive the clamping part to rotate to an inclined position in a first direction so as to apply a reverse bending torque to a local part of the clamped profile, or to drive the clamping part in the inclined position to rotate to a second direction opposite to the first direction and reset.

2. The clamp for partial straightening of profiles according to claim 1, characterized in that: The clamping part includes a mounting frame (3) rotatably connected to the mounting base (1), a first clamping member (4), a second clamping member (5), a first connecting rod (6), a second connecting rod (7), and a second driving part (8); The mounting frame (3) is rotatably connected to the mounting base (1), and the first connecting rod (6) and the second connecting rod (7) are slidably connected to the mounting frame (3). The first connecting rod (6) and the second connecting rod (7) can slide along the height direction of the mounting frame (3). The second driving part (8) is disposed on the mounting frame (3) and is used to drive the first connecting rod (6) and the second connecting rod (7) to slide in opposite directions. The first link (6) and the second link (7) are respectively connected to the first clamping member (4) and the second clamping member (5). The first clamping member (4) and the second clamping member (5) are both located in the mounting frame (3). The first clamping member (4) and the second clamping member (5) are opposite each other. The first clamping member (4) and the second clamping member (5) each have at least one clamping surface.

3. The clamp for partial straightening of profiles according to claim 2, characterized in that: The second drive unit (8) includes a first lever (801), a second lever (802), two first movable blocks (803), two traction rods (804), a second movable block (805), and a push-pull rod (806); The push-pull rod (806) extends along the length of the mounting frame (3), the push-pull rod (806) is slidably engaged with the mounting base (1), the push-pull rod (806) can slide along the length of the mounting frame (3), one end of the push-pull rod (806) is rotatably connected to the piston rod of a hydraulic cylinder (9), and the other end is connected to the second movable block (805). The hydraulic cylinder (9) is connected to the mounting base (1). The two traction rods (804) are rotatably connected at their close ends to the upper and lower ends of the second movable block (805), respectively. The two traction rods (804) are rotatably connected at their far ends to the close ends of the two first movable blocks (803), respectively. The two first movable blocks (803) are slidably engaged with one side of the mounting frame (3). Both first movable blocks (803) can slide along the height direction of the mounting frame (3). The two far ends of the two first movable blocks (803) are movably connected to one end of the first lever (801) and the second lever (802), respectively. The other ends of the first lever (801) and the second lever (802) are movably connected to the upper end of the first connecting rod (6) and the lower end of the second connecting rod (7), respectively. The middle of the first lever (801) and the second lever (802) are rotatably connected to the top and bottom surfaces of the mounting frame (3), respectively.

4. The clamp for partial straightening of irregular profiles according to claim 3, characterized in that: The first lever (801) and the second lever (802) are provided with a first groove (10) and a second groove (11) at both ends. A first slider (1001) and a second slider (1101) are slidably fitted in the first groove (10) and the second groove (11). The two first sliders (1001) are respectively connected to the upper end of the first connecting rod (6) and the lower end of the second connecting rod (7). The two second sliders (1101) are respectively connected to the ends of the two first movable blocks (803) that are far apart from each other.

5. The clamp for partial straightening of profiles according to claim 3, characterized in that: The first drive unit (2) includes a first motor (201), a coupling (202), an external gear ring (203), and a drive gear (204) rotatably connected to the mounting base (1); The first motor (201) is mounted on the mounting base (1). The drive gear (204) is coaxially connected to the output end of the first motor (201). The drive gear (204) meshes with the external gear ring (203). The external gear ring (203) is sleeved on the coupling (202). A groove (2031) extending axially is provided on the inner circular surface of the external gear ring (203). A retaining tooth (2021) is slidably fitted in the groove (2031). The retaining tooth (2021) is connected to the outer circular surface of the coupling (202). The coupling (202) is coaxially connected to the push-pull rod (806).

6. A tooling for partial straightening of irregular profiles, comprising the clamps for partial straightening of irregular profiles as described in claims 1-5, characterized in that: It also includes a base (12) and a first displacement unit (13); Both mounting bases (1) are slidably engaged with the first displacement unit (13), and the two mounting bases (1) can slide horizontally. The first displacement unit (13) is used to drive the two mounting bases (1) to slide in opposite directions. It also includes an auxiliary fixing unit and a second displacement unit (14) that are spaced apart from the clamps used for local straightening of profiles; The first displacement unit (13) is disposed on the second displacement unit (14), and the second displacement unit (14) is used to drive the first displacement unit (13) to slide in a direction closer to or further away from the auxiliary fixing unit, so as to adjust the distance between the mounting base (1) and the auxiliary fixing unit.

7. The tooling for partial straightening of profiles according to claim 6, characterized in that: The mounting frame (3) includes two half-frames (301), the open ends of the two half-frames (301) abut each other to form a frame structure, and the two half-frames (301) are respectively mounted on two mounting bases (1); The first clamping member (4) includes two first clamping blocks (401) arranged at intervals along the length direction of the mounting frame (3), and the two first clamping blocks (401) are respectively connected to the lower ends of the two first connecting rods (6); The second clamping member (5) includes two second clamping blocks (501) arranged at intervals along the length direction of the mounting frame (3), and the two second clamping blocks (501) are respectively connected to the upper ends of the two second connecting rods (7); The two first clamping blocks (401) have their opposite sides in contact, and the two second clamping blocks (501) have their opposite sides in contact. The two first clamping blocks (401) and the two second clamping blocks (501) are vertically opposite each other. The bottom surface of each first clamping block (401) is in contact with the top surface of the corresponding second clamping block (501). The two first clamping blocks (401) and the two second clamping blocks (501) together form a clamping hole.

8. The tooling for partial straightening of irregular profiles according to claim 7, characterized in that: The first displacement unit (13) includes a first mounting bracket (1301), a bidirectional lead screw (1302), two lead screw nuts (1303), and a second motor (1304); The bidirectional lead screw (1302) is rotatably connected to the first mounting bracket (1301), and the two lead screw nuts (1303) are respectively sleeved on the two threads on the bidirectional lead screw (1302), and the two lead screw nuts (1303) are respectively connected to the bottom surfaces of the two mounting seats (1); The first mounting bracket (1301) is provided with a first guide rail (15) extending along its length direction, and both mounting seats (1) are slidably engaged with the first guide rail (15).

9. The tooling for partial straightening of irregular profiles according to claim 8, characterized in that: Two second displacement units (14) are provided along the length direction of the first mounting bracket (1301). Each second displacement unit (14) includes a second mounting bracket (1401), two synchronous gears (1402), a synchronous toothed belt (1403), and a third motor (1404). The synchronous toothed belt (1403) is sleeved on two synchronous gears (1402), and the synchronous toothed belt (1403) meshes with the two synchronous gears (1402). The two synchronous gears (1402) are rotatably connected to both ends of the second mounting bracket (1401). One of the synchronous gears (1402) is coaxially connected to the output end of the third motor (1404), and the third motor (1404) is connected to the second mounting bracket (1401). The base (12) is provided with a toothed portion that meshes with the toothed surface of the synchronous toothed belt (1403); the second mounting bracket (1401) is provided with a second guide rail (16) extending along its length direction, and the base (12) and the second guide rail (16) are slidably engaged.

10. The tooling for partial straightening of profiles according to claim 6, characterized in that: The structure of the auxiliary fixing unit is the same as that of the clamp for local straightening of profiles.

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