Arc-shaped workpiece bidirectional straightening device

Abstract

The present application relates to the technical field of workpiece straightening, in particular to a bidirectional straightening device for arc-shaped workpieces. The bidirectional straightening device for arc-shaped workpieces comprises a base, two groups of support frames are symmetrically installed on the base, a pressing and straightening frame is slidingly installed on the two groups of support frames, a support shaft is rotatably installed on the pressing and straightening frame, a main hydraulic cylinder is fixedly installed on the middle part of the upper surface of the base, the telescopic end of the main hydraulic cylinder is fixedly connected with the bottom end plate of the pressing and straightening frame, a slide rail is fixedly installed on each side of the base based on the main hydraulic cylinder, a sliding seat is slidingly installed on the slide rail, a top straightening assembly is fixedly installed on the sliding seat, and a die assembly is installed on the support shaft. The die assembly comprises an installation sleeve, the installation sleeve is fixedly sleeved on the support shaft, a plurality of straightening dies are installed on the outer side wall of the installation sleeve, and a switching assembly is installed on one side of the pressing and straightening frame. The bidirectional straightening device for arc-shaped workpieces has the advantages of high universality and high straightening precision.

Description

Technical Field

[0001] This invention relates to the field of workpiece straightening technology, and in particular to a bidirectional straightening device for arc-shaped workpieces. Background Technology

[0002] Curved workpieces are components with continuous curvature. Currently, the main methods for straightening curved workpieces are pressing and straightening with a press and simple mold, or traditional methods such as flame heating and hammering.

[0003] However, during the construction of some factories, curved workpieces are mostly non-standard parts. Existing straightening methods for these non-standard curved workpieces have the following problems: Poor versatility of straightening molds: Traditional straightening devices are usually equipped with special molds for workpieces with specific curvatures. One set of molds can only straighten workpieces with one curvature radius. When the workpiece curvature specifications are diverse, molds need to be changed frequently, which is not only cumbersome and time-consuming, but also has high mold manufacturing costs and large storage space, which seriously restricts production efficiency; Single straightening direction: Most existing straightening equipment can only apply pressure to the workpiece in one direction and it is difficult to straighten the inner and outer curved surfaces of the workpiece in two directions at the same time. For curved workpieces with bidirectional deformation defects, multiple clamping and step-by-step straightening are often required, which makes it difficult to guarantee the straightening accuracy. Moreover, multiple clamping can easily cause damage to the workpiece surface.

[0004] Therefore, it is necessary to provide a new bidirectional straightening device for arc-shaped workpieces to solve the above-mentioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a bidirectional straightening device for arc-shaped workpieces.

[0006] The bidirectional straightening device for arc-shaped workpieces provided by the present invention includes: a base, on which two sets of support frames are symmetrically installed, and on which pressure straightening frames are slidably installed, and on which a support shaft is rotatably installed; a main hydraulic cylinder is fixedly installed in the middle of the upper surface of the base, and the telescopic end of the main hydraulic cylinder is fixedly connected to the bottom end plate of the pressure straightening frame; slide rails are fixedly installed on both sides of the upper surface of the base based on the main hydraulic cylinder, and sliding seats are slidably installed on the slide rails; a top straightening component is fixedly installed on each sliding seat; and a mold component is installed on the support shaft. The top straightening assembly includes a lifting hydraulic cylinder, which is fixedly installed on the sliding seat. A top straightening block is fixedly installed at the piston rod end of the lifting hydraulic cylinder. A straightening groove is opened on the upper surface of the top straightening block. Two sets of bottom support assemblies are symmetrically installed in the straightening groove. Both side plates of the top straightening block are opened with through grooves. A side straightening assembly is installed in the through groove. The side straightening assembly is installed in the through groove and provides straightening force from the side of the workpiece to achieve shaping and straightening of the side of the workpiece and prevent wavy deformation of the side. The mold assembly includes an installation sleeve, which is fixedly sleeved on the support shaft. Several straightening molds are installed on the outer side wall of the installation sleeve. A switching component is installed on one side of the pressure straightening frame. The switching component drives the support shaft to rotate, switching different straightening molds. The several straightening molds are distributed at equal angles along the circumference of the installation sleeve, and different straightening molds have different radii of curvature or cutting edge shapes. Several T-slots are evenly opened on the outer side wall of the installation sleeve. The straightening mold includes an I-shaped mold frame, which is slidably installed in the T-slots. A shaping template is detachably installed on the I-shaped mold frame. The shaping template has a forming surface A and a forming surface B that match each other. Locking nuts are threadedly installed on both ends of the support shaft located inside the pressure straightening frame. Several withdrawal slots are evenly opened on the locking nuts. The top straightening assembly provides support for the workpiece, and then the main hydraulic cylinder drives the straightening frame to slide downward along the support frame, so that the straightening mold in the mold assembly installed on the support shaft contacts the outer arc surface of the workpiece from above and applies straightening pressure. The top straightening assembly presses the workpiece from below, forming a two-way collaborative straightening with the straightening mold above, effectively eliminating the deformation defects of the inner and outer arc surfaces of the arc-shaped workpiece.

[0007] Preferably, guide frames are fixedly installed at both ends of the top of the straightening frame, and a horizontally arranged slide rod is slidably installed on the guide frame. A C-shaped insert rod is fixedly installed at the end of the slide rod facing the I-shaped mold frame, and the C-shaped insert rod is inserted into the groove of the I-shaped mold frame.

[0008] Preferably, the outer wall of the slide bar is provided with a limiting groove, and the guide frame is provided with a protrusion that slides in cooperation with the limiting groove.

[0009] Preferably, the base support assembly includes a limiting ring, which consists of two sets of mating semi-rings and is fixedly installed on the bottom of the top straightening block by screws. A threaded sleeve is rotatably installed inside the limiting ring, and a support screw is threadedly installed inside the threaded sleeve. The top end of the support screw passes through a through hole in the top straightening block and extends into the straightening groove, and a base support rod is fixedly installed thereon. The two side plates of the top straightening block are provided with sliding grooves that slide with the base support rod.

[0010] Preferably, the side straightening assembly includes a lateral hydraulic cylinder, which is fixedly installed on the side plate of the top straightening block, and the telescopic end of the lateral hydraulic cylinder extends into the through groove and is fixedly installed with a side pressure plate.

[0011] Preferably, the switching assembly includes a worm gear fixedly sleeved on one end of the support shaft, a worm rotatably mounted on the support frame, a servo motor coaxially connected to one end of the worm, the servo motor being fixedly mounted on the support frame and electrically connected to a control box, and the control box being fixedly mounted on the outer wall of the support frame.

[0012] Preferably, a pull plate is fixedly installed on one side of the sliding seat, and a plurality of spaced holes are evenly opened on one side of the slide rail on the base. A positioning pin is threadedly installed on the pull plate and is engaged with the spaced holes.

[0013] Preferably, the vertical rods of the two sets of support frames are provided with slots, and the top two sides of the pressure straightening frame are fixedly installed with plug-in feet that slide in cooperation with the slots.

[0014] Compared with related technologies, the bidirectional straightening device for arc-shaped workpieces provided by the present invention has the following beneficial effects: 1. This invention provides a bidirectional straightening device for arc-shaped workpieces. By setting up a mold assembly, multiple straightening molds with different radii of curvature or cutting edge shapes are distributed at equal angles along the circumference on the mounting sleeve. With the help of the worm gear switching assembly, the required straightening mold can be quickly switched to the working position by driving the support shaft to rotate through the servo motor without disassembling or replacing the molds. This enables rapid switching of straightening molds for workpieces with different curvature specifications, greatly shortens auxiliary time, and improves production efficiency. 2. This invention drives the straightening frame downward through the main hydraulic cylinder, so that the straightening mold applies pressure to the outer arc surface of the arc workpiece from above. At the same time, the lifting hydraulic cylinder of the top straightening component drives the top straightening block to provide support and top pressure to the inner arc surface of the workpiece from below, so as to achieve bidirectional coordinated straightening from above and below, effectively eliminating the bidirectional deformation defects of the arc workpiece. The synchronous straightening of the inner and outer arc surfaces can be completed in one clamping, avoiding the accuracy loss and surface damage caused by multiple clamping. 3. The present invention symmetrically sets two sets of bottom support components in the correction groove of the top straightening block. The support screw is driven to rise and fall by rotating the threaded sleeve, and the support height of the bottom support rods on both sides can be independently adjusted. In conjunction with the side pressure plates driven by the lateral hydraulic cylinders on both sides of the top straightening block, multi-directional limiting and support of the bottom and sides of the arc-shaped workpiece can be achieved, effectively preventing the workpiece from sliding or warping during the correction process, and ensuring the accuracy of the correction position and the consistency of the correction effect. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the bidirectional straightening device for arc-shaped workpieces provided by the present invention; Figure 2 A schematic diagram of the bidirectional straightening device for arc-shaped workpieces provided by the present invention from another perspective; Figure 3 for Figure 1 A magnified view of a portion of A shown; Figure 4 for Figure 2 A magnified view of part B shown; Figure 5 A schematic diagram of a support shaft mounted on a pressure straightening frame provided by the present invention; Figure 6 A schematic diagram of a switching assembly installed on a pressure straightening frame provided by the present invention; Figure 7 A schematic diagram of the structure of the straightening frame provided by the present invention, in which an inverted U-shaped insert is installed; Figure 8 A schematic diagram of a mold assembly mounted on a support shaft provided by the present invention; Figure 9 A schematic diagram of a support shaft with an mounting sleeve installed according to the present invention; Figure 10 This is a schematic diagram of the top straightening assembly provided by the present invention; Figure 11 A schematic diagram of the structure provided by the present invention, showing a bottom support assembly and a side correction assembly mounted on a top correction block; Figure 12 An exploded view of the base assembly provided by the present invention; Figure 13 This is a schematic diagram of the structure of the shaping template provided by the present invention; Figure 14 This is a schematic diagram of the structure of the corrected arc-shaped workpiece.

[0016] The diagram labels are as follows: 1. Base; 101. Spacing hole; 11. Slide rail; 12. Sliding seat; 121. Pull plate; 122. Positioning pin; 2. Support frame; 201. Limiting groove; 202. Slot; 21. Pressure straightening frame; 211. Insertion foot; 22. Guide frame; 221. Protrusion; 23. Slide rod; 24. C-shaped insert rod; 3. Support shaft; 31. Locking nut block; 301. Retraction groove; 4. Main hydraulic cylinder; 5. Top straightening assembly; 51. Lifting hydraulic cylinder; 52. Top straightening block; 501. Straightening groove; 502. Through groove; 503. Slide groove; 53. Base support assembly; 531. Limiting circlip; 532. Threaded sleeve; 533. Support screw; 534. Base support rod; 54. Side straightening assembly; 541. Side hydraulic cylinder; 542. Side pressure plate; 6. Mold assembly; 601. T-slot; 61. Mounting sleeve; 62. Straightening mold; 621. I-shaped mold frame; 622. Shaping template; 622a. Forming surface A; 622b. Forming surface B; 7. Switching assembly; 71. Worm gear; 72. Worm; 73. Servo motor; 8. Control box. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0019] Please see Figures 1 to 14 The present invention provides a bidirectional straightening device for arc-shaped workpieces, which includes: a base 1, a support frame 2, a slide rail 11, a sliding seat 12, a pressure straightening frame 21, a support shaft 3, a main hydraulic cylinder 4, a top straightening assembly 5, a mold assembly 6, and a switching assembly 7.

[0020] In practice, the arc-shaped workpiece to be corrected is placed on the top straightening assembly 5, which provides support for the workpiece. Then, the main hydraulic cylinder 4 drives the straightening frame 21 to slide downward along the support frame 2, so that the straightening mold 62 in the mold assembly 6 mounted on the support shaft 3 contacts the outer arc surface of the workpiece from above and applies straightening pressure. Then, according to the target arc specification of the workpiece, the switching assembly 7 drives the support shaft 3 to rotate, and switches the corresponding straightening mold 62 on the mounting sleeve 61 to the straightening position facing the workpiece. Different straightening molds 62 have different radii of curvature or cutting edge shapes, which can be adapted to workpieces with different arc specifications. The top straightening assembly 5 presses the workpiece from below, forming a two-way collaborative straightening with the straightening mold 62 above, effectively eliminating the deformation defects of the inner and outer arc surfaces of the arc-shaped workpiece. Through rapid switching, continuous arc-shaped workpiece straightening processing can be performed, and different non-standard parts can be switched for straightening.

[0021] In a further embodiment, depending on actual needs, shock-absorbing pads or leveling bolts can be installed at the bottom of the base 1 to reduce the impact of equipment vibration on the correction accuracy during the correction process and to ensure the levelness of the device under different ground conditions. For ease of use on site, the base 1 is detachably connected to the support frame 2 and slide rail 11; the pressure straightening frame 21 and main hydraulic cylinder 4; the slide 12 and top straightening assembly 5 by bolts and screws, so that it can be quickly assembled and used on site. The bottom of the base 1 can also be further equipped with locking casters for easy dragging.

[0022] In an embodiment of the present invention, please refer to Figure 1 , Figure 3 and Figure 10 A pull plate 121 is fixedly installed on one side of the sliding seat 12. Several spacer holes 101 are evenly opened on one side of the slide rail 11 on the base 1. A positioning pin 122 that is threaded onto the pull plate 121 and is inserted into the spacer hole 101 is installed.

[0023] It should be noted that the sliding seat 12 can slide along the slide rail 11 to adjust the position of the top straightening assembly 5 in the horizontal direction to adapt to the support requirements of workpieces with different widths or curvatures. After the sliding seat 12 slides to the appropriate position, the positioning pin 122 is inserted into the corresponding distance hole 101 to lock the sliding seat 12 on the base 1, preventing the sliding seat 12 from shifting during the straightening process and ensuring the accuracy of the straightening position.

[0024] In the optional scheme: the vertical rods of the two sets of support frames 2 are provided with slots 202, and the top two sides of the pressure straightening frame 21 are fixedly installed with plug feet 211 that slide with the slots 202. The plug feet 211 slide with the slots 202 to guide the lifting and lowering movement of the pressure straightening frame 21, ensuring that the pressure straightening frame 21 remains horizontal during the lifting and lowering process, so that the straightening mold 62 can apply vertical pressure and avoid uneven load.

[0025] In an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 5 , Figure 8 and Figure 9 Two sets of support frames 2 are symmetrically installed on the base 1. A straightening frame 21 is slidably installed on each set of support frames 2. A support shaft 3 is rotatably installed on each straightening frame 21. A main hydraulic cylinder 4 is fixedly installed in the middle of the upper surface of the base 1. The telescopic end of the main hydraulic cylinder 4 is fixedly connected to the bottom end plate of the straightening frame 21. Slide rails 11 are fixedly installed on both sides of the upper surface of the base 1 based on the main hydraulic cylinder 4. Sliding seats 12 are slidably installed on the slide rails 11. Top straightening components 5 are fixedly installed on each sliding seat 12. The support shaft 3... A mold assembly 6 is installed on the support shaft 3. The mold assembly 6 includes a mounting sleeve 61, which is fixedly sleeved on the support shaft 3. Several straightening molds 62 are installed on the outer side wall of the mounting sleeve 61. A switching assembly 7 is installed on one side of the pressure straightening frame 21. The support shaft 3 is driven to rotate by the switching assembly 7 to switch different straightening molds 62. Several straightening molds 62 are distributed at equal angles along the circumference of the mounting sleeve 61, and different straightening molds 62 have different radii of curvature or cutting edge shapes.

[0026] It should be noted that during use, the mounting sleeve 61 of the mold assembly 6 is fixedly sleeved on the support shaft 3 and rotates synchronously with the support shaft 3. Multiple straightening molds 62 are distributed at equal angles along the circumference of the mounting sleeve 61. When different sizes of arc-shaped workpieces need to be straightened, the support shaft 3 is driven to rotate by the switching assembly 7 by a predetermined angle, so that the target straightening mold 62 rotates to the downward working position. Tool switching can be completed without disassembling and replacing the mold, which is convenient for rapid and continuous straightening of arc-shaped workpieces. The main hydraulic cylinder 4 drives the pressure straightening frame 21 to slide up and down along the support frame 2 to realize the application and release of straightening pressure. The sliding seat 12 can slide along the slide rail 11 to adjust the position of the top straightening assembly 5 in the horizontal direction to adapt to the support requirements of workpieces of different sizes.

[0027] In an embodiment of the present invention, please refer to Figure 1 , Figure 8 , Figure 9 and Figure 13The outer wall of the mounting sleeve 61 is evenly provided with several T-slots 601. The straightening mold 62 includes an I-shaped mold frame 621, which is slidably installed in the T-slots 601. A shaping template 622 is detachably installed on the I-shaped mold frame 621. The shaping template 622 has a forming surface A622a and a forming surface B622b that match each other. Both ends of the support shaft 3 located in the straightening frame 21 are threaded with locking nuts 31. Several withdrawal grooves 301 are evenly provided on the locking nuts 31.

[0028] It should be noted that: the I-shaped mold base 621 and the T-slot 601 are in sliding fit, allowing the straightening mold 62 to be slidably installed and disassembled along the axial direction of the mounting sleeve 61, facilitating replacement and maintenance. The shaping template 622 and the I-shaped mold base 621 can be connected by bolts or locating pins, etc., in a detachable manner. When the shaping template 622 wears, only the shaping template 622 needs to be replaced, without replacing the entire straightening mold 62, reducing usage costs. The forming surface A622a and the forming surface B622b match each other, where the forming surface A622a is used for straightening and pressing the outer arc surface, and the forming surface B622b is used for... The inner arc surface is supported and shaped. The same shaping template 622 can be used for bidirectional correction of the inner and outer arc surfaces. The locking nut 31 is threaded on both ends of the support shaft 3. The ejection groove 301 on the locking nut 31 corresponds one-to-one with the T-slot 601. When it is necessary to disassemble the correction mold 62, rotate the locking nut 31 to align its ejection groove 301 with the T-slot 601, and the I-shaped mold frame 621 can slide out of the T-slot 601. After installation, rotate the locking nut 31 to misalign the ejection groove 301 with the T-slot 601. The inner wall of the locking nut 31 blocks the end of the I-shaped mold frame 621 to prevent it from slipping axially and achieve locking.

[0029] It is worth noting that the shaping template 622 here needs to be designed according to the curved workpiece (non-standard parts such as...). Figure 14 The curvature of the workpiece (as shown) is customized to achieve bidirectional top straightening. When straightening a long curved workpiece, if the workpiece is bent downwards, the ends of the curved workpiece may touch the ground if the top straightening height is insufficient due to the length of the workpiece. An adjustable height tooling support platform can be built on site, and the base 1 can be installed on the tooling support platform with screws. By adjusting the height of the base 1 from the ground, the bending straightening of the long curved workpiece can be achieved.

[0030] In this embodiment: In order to facilitate the sliding withdrawal and installation of the I-shaped mold frame 621 from the T-slot 601, the top of the pressure straightening frame 21 is provided with a relief groove. When the I-shaped mold frame 621 needs to be replaced, it is rotated to the top, and then the locking nut block 31 is rotated so that its withdrawal groove 301 corresponds to the T-slot 601, so that the I-shaped mold frame 621 can be slid out or installed from the top.

[0031] In an embodiment of the present invention, please refer to Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9 Guide frames 22 are fixedly installed at both ends of the top of the straightening frame 21. A horizontally arranged slide rod 23 is slidably installed on the guide frame 22. A C-shaped insert rod 24 is fixedly installed at one end of the slide rod 23 facing the I-shaped mold frame 621. The C-shaped insert rod 24 is inserted into the groove of the I-shaped mold frame 621. A limiting groove 201 is opened on the outer side wall of the slide rod 23. A protrusion 221 that slides with the limiting groove 201 is opened on the guide frame 22.

[0032] It should be noted that when the bottom straightening mold 62 is being straightened, the sliding rod 23 is pushed along the guide frame 22 towards the mounting sleeve 61, so that the C-shaped insert 24 is inserted into the groove of the I-shaped mold frame 621, and the I-shaped mold frame 621 is pressed down further to ensure the stability of the straightening mold 62 during the straightening process. This also prevents the support shaft 3 from bending due to the force generated during the straightening process. The sliding fit between the limiting groove 201 and the protrusion 221 limits the sliding of the sliding rod 23 and prevents the sliding rod 23 from rotating, which would affect the insertion fit between the C-shaped insert 24 and the I-shaped mold frame 621.

[0033] Furthermore, the curved workpiece here, such as Figure 14 As shown, the hollow square tube does not require an impact load exceeding the support load of the support shaft 3 during the correction process. Moreover, the correction is performed by slow, upward and downward pressure rather than high-speed impact correction. As a result, the support shaft 3 can remain stable during the correction process, allowing the correction to proceed smoothly.

[0034] It is worth noting that when switching the straightening mold 62, the slide bar 23 needs to be pulled outward first to make the C-shaped insert 24 exit from the groove of the I-shaped mold frame 621, thereby releasing the radial limit on the I-shaped mold frame 621. Then, the tool switching is performed by driving the support shaft 3 to rotate through the switching component 7.

[0035] In an embodiment of the present invention, please refer to Figure 1 , Figure 2 , Figure 10 , Figure 11 and Figure 12 The top straightening component 5 includes a lifting hydraulic cylinder 51, which is fixedly installed on the sliding seat 12. A top straightening block 52 is fixedly installed at the piston rod end of the lifting hydraulic cylinder 51. A straightening groove 501 is opened on the upper surface of the top straightening block 52. Two sets of bottom support components 53 are symmetrically installed in the straightening groove 501. Both side plates of the top straightening block 52 are provided with through grooves 502. Side straightening components 54 are installed in the through grooves 502.

[0036] It should be noted that: when the top straightening component 5 is in use, the lifting hydraulic cylinder 51 drives the top straightening block 52 to rise and fall, and adjusts the height position of the top straightening block 52 so that the top straightening block 52 contacts the inner arc surface of the arc-shaped workpiece from below and provides support force. The straightening groove 501 provides positioning space for the placement of the arc-shaped workpiece. Two sets of bottom support components 53 are symmetrically arranged in the straightening groove 501 to support the workpiece from both sides of the bottom. The side straightening component 54 is installed in the through groove 502 to provide straightening force from the side of the workpiece, thereby realizing the shaping and straightening of the side of the workpiece and preventing the side wavy deformation.

[0037] In this embodiment: the base support assembly 53 includes a limiting ring 531, which is composed of two sets of mating semi-rings and is fixedly installed on the bottom of the top straightening block 52 by screws. A threaded sleeve 532 is rotatably installed inside the limiting ring 531. A support screw 533 is threadedly installed inside the threaded sleeve 532. The top end of the support screw 533 passes through the through hole opened in the top straightening block 52 and extends into the straightening groove 501, and a base support rod 534 is fixedly installed thereon. The two side plates of the top straightening block 52 are provided with sliding grooves 503 that slide with the base support rod 534.

[0038] It should be noted that the support height of the base support assembly 53 can be adjusted by rotating the threaded sleeve 532. The threaded sleeve 532 rotates within the limiting retaining ring 531 but does not undergo axial displacement. The support screw 533 rises and falls axially with the rotation of the threaded sleeve 532, thereby driving the base support rod 534 to rise and fall. This enables independent adjustment of the support height of the bottom of workpieces with different curvatures, allowing the base support rod 534 to fit tightly against different positions on the lower surface of the curved workpiece, providing stable support. The slide groove 503 slides with the base support rod 534 to guide the rising and falling movement of the base support rod 534, ensuring that the rising and falling of the base support rod 534 is smooth.

[0039] In an optional configuration: the side straightening assembly 54 includes a lateral hydraulic cylinder 541, which is fixedly mounted on the side plate of the top straightening block 52. The telescopic end of the lateral hydraulic cylinder 541 extends into the through groove 502 and is fixedly mounted with a side pressure plate 542. The lateral hydraulic cylinder 541 drives the side pressure plate 542 to extend and retract horizontally, applying pressure from the side of the workpiece to the curved workpiece (e.g., ...). Figure 14 The side of the workpiece is straightened and shaped to effectively eliminate side warping deformation. A rubber pad can be set on the surface of the side pressure plate 542 that contacts the workpiece to avoid damaging the workpiece surface.

[0040] In an embodiment of the present invention, please refer to Figure 1 and Figure 4The switching component 7 includes a worm gear 71 fixedly sleeved on one end of the support shaft 3, a worm 72 rotatably mounted on the support frame 2, a servo motor 73 coaxially connected to one end of the worm 72, the servo motor 73 is fixedly mounted on the support frame 2 and electrically connected to a control box 8, and the control box 8 is fixedly mounted on the outer wall of the support frame 2.

[0041] It should be noted that when the switching component 7 is working, the control box 8 controls the servo motor 73 to start, the servo motor 73 drives the worm gear 72 to rotate, the worm gear 72 drives the worm wheel 71 to rotate, and the worm wheel 71 drives the support shaft 3 to rotate, thereby driving the straightening mold 62 on the mounting sleeve 61 to switch. The transmission pair of worm wheel 71 and worm gear 72 has a self-locking characteristic. When the servo motor 73 stops rotating, the support shaft 3 is locked in the current position to ensure that the straightening mold 62 will not deflect during the straightening process and to ensure the straightening accuracy. The control box 8 can preset the rotation angle corresponding to each straightening mold 62 to realize one-button automatic switching.

[0042] It is worth noting that, in order to achieve multiple controls through the control box 8, the operation of various hydraulic cylinders in this invention is all controlled by operation buttons integrated in the control box 8, and each hydraulic cylinder can be controlled independently, which is convenient for adjusting to different pressure and straightening heights for correction. Moreover, each hydraulic cylinder is connected to a standard hydraulic system through external pipelines to achieve its extension and retraction control (each hydraulic cylinder obtains power through a pipeline connected to an external hydraulic pump station, and switches the flow direction of hydraulic oil by operating the reversing valve on the pipeline, thereby controlling the extension or retraction of the telescopic rod in the hydraulic cylinder). The specific settings of this hydraulic system are conventional technology in the field. In addition, the circuits and controls involved in this invention are all existing technologies, and will not be described in detail here.

[0043] The working principle of the bidirectional straightening device for arc-shaped workpieces provided by this invention is as follows: In use, firstly, according to the curvature specifications of the workpiece to be corrected, the servo motor 73 is started via the control box 8. The servo motor 73 drives the worm wheel 71 to rotate via the worm gear 72. The worm wheel 71 drives the support shaft 3 to rotate, rotating the correction mold 62 with the corresponding radius of curvature or cutting edge shape on the mounting sleeve 61 to the downward working position. The self-locking characteristics of the worm wheel 71 and worm gear 72 ensure that the support shaft 3 is locked after switching. Then, the sliding seat 12 is pushed to slide along the slide rail 11. The top straightening assembly 5 is adjusted to a suitable position according to the width of the workpiece. The positioning pin 122 is inserted into the corresponding distance hole 101 to lock the sliding seat 12. The workpiece to be corrected is placed in the correction groove 501 of the top straightening block 52. According to the curvature of the lower surface of the workpiece, the threaded sleeves 532 of the two sets of bottom support assemblies 53 are rotated respectively to drive the support screw 53. 3. Lifting and adjusting the support height of the bottom support rods 534 on both sides, so that the bottom support rods 534 are closely fitted with different positions of the inner arc surface of the workpiece, providing stable bottom support. Next, the main hydraulic cylinder 4 is activated. The telescopic end of the main hydraulic cylinder 4 pushes the straightening frame 21 to slide downward along the support frame 2, so that the straightening mold 62 installed on the support shaft 3 contacts the outer arc surface of the arc-shaped workpiece from above and applies downward straightening pressure. At the same time, the lifting hydraulic cylinder 51 is activated. The lifting hydraulic cylinder 51 drives the top straightening block 52 to move upward, applying top pressure to the inner arc surface of the workpiece from below, forming a two-way coordinated straightening with the straightening mold 62 above. According to the straightening needs, the lateral hydraulic cylinder 541 is activated. The lateral hydraulic cylinder 541 drives the side pressure plate 542 to extend horizontally, applying pressure from the side of the workpiece to shape and straighten the side of the workpiece. After straightening processing, it becomes as shown. Figure 14 A type of arc-shaped workpiece; After the correction is completed, the main hydraulic cylinder 4 drives the straightening frame 21 to reset upward, the lifting hydraulic cylinder 51 drives the top straightening block 52 to reset downward, and the lateral hydraulic cylinder 541 drives the side pressure plate 542 to reset. The corrected arc-shaped workpiece is then removed. When it is necessary to switch to workpieces with different curvature specifications, the slide bar 23 is pulled outward to make the C-shaped insert 24 exit from the groove of the I-shaped mold frame 621. The servo motor 73 is controlled by the control box 8 to switch the required straightening mold 62 to the working position. The slide bar 23 is pushed to make the C-shaped insert 24 insert into the groove of the I-shaped mold frame 621 to complete the limit. Then the correction operation of the next workpiece can be carried out. When the straightening mold 62 wears out after prolonged use, rotate the locking nut 31 to align its ejection groove 301 with the T-slot 601, slide the I-shaped mold frame 621 out of the T-slot 601, remove the shaping template 622 for replacement, and after replacement, slide the I-shaped mold frame 621 back into the T-slot 601, rotate the locking nut 31 to lock the ejection groove 301 and the T-slot 601 in a misaligned manner, and it can be used again.

[0044] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0045] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A bidirectional straightening device for arc-shaped workpieces, comprising: A base (1) is provided, on which two sets of support frames (2) are symmetrically installed. A pressure straightening frame (21) is slidably installed on the two sets of support frames (2). A support shaft (3) is rotatably installed on the pressure straightening frame (21). The base (1) is characterized in that a main hydraulic cylinder (4) is fixedly installed in the middle of the upper surface of the base (1). The telescopic end of the main hydraulic cylinder (4) is fixedly connected to the bottom end plate of the pressure straightening frame (21). A slide rail (11) is fixedly installed on both sides of the upper surface of the base (1) based on the main hydraulic cylinder (4). A sliding seat (12) is slidably installed on the slide rail (11). A top straightening component (5) is fixedly installed on the sliding seat (12). A mold component (6) is installed on the support shaft (3). The top straightening assembly (5) includes a lifting hydraulic cylinder (51), which is fixedly installed on the sliding seat (12). A top straightening block (52) is fixedly installed at the piston rod end of the lifting hydraulic cylinder (51). A straightening groove (501) is opened on the upper surface of the top straightening block (52). Two sets of bottom support assemblies (53) are symmetrically installed in the straightening groove (501). Both sides of the top straightening block (52) are provided with through grooves (502). A side straightening assembly (54) is installed in the through groove (502). The side straightening assembly (54) is installed in the through groove (502) to provide straightening force from the side of the workpiece, thereby achieving the shaping and straightening of the side of the workpiece and preventing the side from wavy deformation. The mold assembly (6) includes a mounting sleeve (61), which is fixedly sleeved on the support shaft (3). Several straightening molds (62) are mounted on the outer side wall of the mounting sleeve (61). A switching assembly (7) is mounted on one side of the straightening frame (21). The switching assembly (7) drives the support shaft (3) to rotate, switching between different straightening molds (62). The several straightening molds (62) are evenly distributed along the circumference of the mounting sleeve (61), and different straightening molds (62) have different radii of curvature or cutting edge shapes. The mounting sleeve (61) has... The outer wall is evenly provided with a number of T-slots (601). The straightening mold (62) includes an I-shaped mold frame (621). The I-shaped mold frame (621) is slidably installed in the T-slots (601). A shaping template (622) is detachably installed on the I-shaped mold frame (621). The shaping template (622) has a forming surface A (622a) and a forming surface B (622b) that match each other. Both ends of the support shaft (3) located in the straightening frame (21) are threaded with locking nuts (31). A number of withdrawal slots (301) are evenly provided on the locking nuts (31). The top straightening assembly (5) provides support for the workpiece, and then the main hydraulic cylinder (4) drives the pressure straightening frame (21) to slide down along the support frame (2), so that the straightening mold (62) in the mold assembly (6) installed on the support shaft (3) contacts the outer arc surface of the workpiece from above and applies straightening pressure. The top straightening assembly (5) presses the workpiece from below, forming a two-way collaborative straightening with the straightening mold (62) above, effectively eliminating the deformation defects of the inner and outer arc surfaces of the arc workpiece.

2. The bidirectional straightening device for arc-shaped workpieces according to claim 1, characterized in that, Guide frames (22) are fixedly installed at both ends of the top of the straightening frame (21). A horizontally arranged slide rod (23) is slidably installed on the guide frame (22). A U-shaped insert rod (24) is fixedly installed at one end of the slide rod (23) facing the I-shaped mold frame (621). The U-shaped insert rod (24) is inserted into the groove of the I-shaped mold frame (621).

3. The bidirectional straightening device for arc-shaped workpieces according to claim 2, characterized in that, The outer side wall of the slide bar (23) is provided with a limiting groove (201), and the guide frame (22) is provided with a protrusion (221) that slides in cooperation with the limiting groove (201).

4. The bidirectional straightening device for arc-shaped workpieces according to claim 1, characterized in that, The base support assembly (53) includes a limiting ring (531), which consists of two sets of mating semi-rings and is fixedly installed at the bottom of the top straightening block (52) by screws. A threaded sleeve (532) is rotatably installed inside the limiting ring (531). A support screw (533) is threaded inside the threaded sleeve (532). The top end of the support screw (533) passes through the through hole opened in the top straightening block (52) and extends into the straightening groove (501), and a base support rod (534) is fixedly installed thereon. The two side plates of the top straightening block (52) are provided with sliding grooves (503) that slide with the base support rod (534).

5. The bidirectional straightening device for arc-shaped workpieces according to claim 1, characterized in that, The side straightening assembly (54) includes a side hydraulic cylinder (541), which is fixedly installed on the side plate of the top straightening block (52), and the telescopic end of the side hydraulic cylinder (541) extends into the through groove (502) and is fixedly installed with a side pressure plate (542).

6. The bidirectional straightening device for arc-shaped workpieces according to claim 1, characterized in that, The switching assembly (7) includes a worm gear (71) fixedly sleeved on one end of the support shaft (3), a worm (72) rotatably mounted on the support frame (2), a servo motor (73) coaxially connected to one end of the worm (72), the servo motor (73) is fixedly mounted on the support frame (2) and electrically connected to a control box (8), and the control box (8) is fixedly mounted on the outer wall of the support frame (2).

7. The bidirectional straightening device for arc-shaped workpieces according to claim 1, characterized in that, A pull plate (121) is fixedly installed on one side of the sliding seat (12). Several fixed holes (101) are evenly opened on one side of the slide rail (11) on the base (1). A positioning pin (122) that is inserted into the fixed hole (101) is threaded on the pull plate (121).

8. The bidirectional straightening device for arc-shaped workpieces according to claim 1, characterized in that, The vertical rods of the two sets of support frames (2) are provided with slots (202), and the top sides of the pressure straightening frame (21) are fixedly installed with plug-in feet (211) that slide with the slots (202).

Images