A thermoforming device

Abstract

The application relates to the technical field of forming equipment, and particularly discloses a hot forming device which comprises a heating device, a platform component, a torsion fixing device component, a torsion shaft component and a driving mechanism. The heating device is used for heating a part to be twisted of a workpiece to be twisted formed; the platform component is used for placing the workpiece or the heating device and moving the heating device or the workpiece so as to correspond to the part to be twisted or move out of the part to be twisted; the torsion fixing device component is provided with a clamping groove; the torsion shaft component comprises a fixing seat and a torsion shaft rotationally connected with the fixing seat, and one end of the torsion shaft is provided with a positioning part used for positioning the workpiece; and the output end of the driving mechanism is connected with the torsion shaft so as to drive the torsion shaft to rotate. The hot forming device provided by the application adopts local heating of a heating assembly to replace a gas furnace, energy consumption and operation waiting time are reduced, operating personnel do not need to work in a high-temperature environment, the working environment is improved, and the working safety is also improved.

Description

Technical Field

[0001] This invention relates to the field of forming equipment technology, and more specifically, to a thermoforming apparatus. Background Technology

[0002] Thermoforming is a commonly used processing method in material processing. Taking the general-purpose foot pedal body A for railway freight cars as an example, its China Railway standard code is Q / CR187.1-2014. Figure 1 As shown, due to the special shape characteristics of the general-purpose pedal body A for railway freight cars (hereinafter referred to as the pedal body), two torsion parts 01 need to be formed. Specifically, during forming, the pedal body within this forming range needs to be heated to a bright red color at a temperature of 830℃-900℃ to reduce its ultimate strength before forming. Currently, the heating method involves placing a certain number of pedal bodies into a gas-fired furnace. After all parts are heated to the required temperature, the operator removes the heated workpieces from the furnace and transfers them to a dedicated forming device for torsion forming.

[0003] However, the heating method described above requires approximately 3 hours, resulting in wasted time and energy during the heating process. Furthermore, due to the stacking method of the pedals within the furnace, by the time the innermost workpieces reach the required temperature, the outer workpieces have already undergone scorching, necessitating the removal of surface oxide scale, which increases the manufacturing cost of the pedals. Additionally, removing the pedals from the furnace and processing them into finished products requires five operators taking turns. During this process, the temperature of the pedal body inevitably drops, affecting the forming accuracy. Therefore, a specialized shaping device is required for reshaping after the pedals are formed. The process is cumbersome, and the furnace door remains open throughout the process, resulting in a high ambient temperature. Therefore, certain measures must be taken to ensure the safety of the operators.

[0004] In summary, how to effectively solve the problems of high energy consumption and easy overburning when using gas furnaces for thermoforming is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a thermoforming apparatus whose structural design can effectively solve the problems of high energy consumption and easy overburning in gas furnace heating.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A thermoforming apparatus, comprising:

[0008] A heating device used to heat the part of a workpiece to be twisted during twisting forming;

[0009] The platform is configured to place the workpiece and / or the heating device, and to move the heating device or the workpiece so that the heating device corresponds to or moves away from the part to be twisted.

[0010] The torsion fixing device consists of a slot, which is used to lock onto the workpiece to locate the torsion starting position.

[0011] The torsion shaft assembly includes a fixed base and a torsion shaft rotatably connected to the fixed base, with a positioning part for positioning the workpiece at one end of the torsion shaft;

[0012] A drive mechanism, the output end of which is connected to the torsion shaft to drive the torsion shaft to rotate.

[0013] Optionally, in the above-mentioned thermoforming apparatus, the platform comprises:

[0014] A support assembly for supporting the workpiece, and the support assembly is provided with a front stop for limiting the movement limit of the workpiece toward one end of the torsion axis;

[0015] A pusher drive component is provided on the support assembly, and the output end of the pusher drive component is used to push the workpiece toward one end of the torsion shaft assembly.

[0016] Optionally, in the above-described thermoforming apparatus, the distance between the front member and the torsion shaft is adjustable.

[0017] Optionally, in the above-described thermoforming apparatus, the support assembly includes:

[0018] A movable stop is used to support one end of the workpiece;

[0019] A support panel is disposed opposite to the movable stop and located at one end of the movable stop away from the torsion shaft, and is used to support the other end of the workpiece. The front stop, the pusher drive component and the heating device are all disposed on the support panel.

[0020] A shift gear drive component is disposed on the support panel, and the output end of the shift gear drive component is connected to the shift gear to drive the shift gear to move closer to or away from the torsion shaft.

[0021] Optionally, in the above-mentioned thermoforming apparatus, the movable stop includes a supporting base plate and a movable side stop provided on the supporting base plate, the movable side stop being used to limit the end of the workpiece.

[0022] Optionally, the above-mentioned thermoforming apparatus further includes:

[0023] The frame assembly includes a platform assembly that is slidably mounted on the frame assembly, and the torsion fixing device assembly, the torsion shaft assembly, and the drive mechanism are all mounted on the frame assembly.

[0024] A platform drive component is disposed on the frame assembly, and the output end of the platform drive component is connected to the platform assembly to drive the platform assembly to move closer to or away from the torsion shaft assembly.

[0025] Optionally, in the above-described thermoforming apparatus, the heating device includes an electromagnetic induction coil.

[0026] Optionally, in the above-mentioned thermoforming apparatus, the torsion fixing device comprises:

[0027] Booth seating;

[0028] A card plate is slidably disposed on the card holder, and the card slot is formed in the card holder;

[0029] A clamping drive component, the output end of which is connected to the clamping plate to drive the clamping plate to clamp outside or away from the workpiece.

[0030] Optionally, in the above-described thermoforming apparatus, the driving mechanism includes:

[0031] Mounting base;

[0032] A rack is slidably mounted on the mounting base;

[0033] A gear meshes with the rack, and the gear is fixedly connected to the torsion shaft;

[0034] A loading drive component is provided, the output end of which is connected to the rack to drive the rack to slide and drive the gear to rotate.

[0035] Optionally, in the above-described thermoforming apparatus, the driving mechanism further includes:

[0036] A rack guide sleeve is provided on the mounting base;

[0037] A rack guide rod passes through the rack guide sleeve, and the rack guide sleeve is fixedly connected to the rack.

[0038] Optionally, in the above-mentioned thermoforming apparatus, the driving mechanism includes two racks and two corresponding gears, and includes two torsion shafts respectively corresponding to the two gears.

[0039] Optionally, the above-mentioned thermoforming apparatus further includes:

[0040] A limiting beam is provided at one end of the rack in the loading direction to abut against the rack and limit the sliding limit position of the rack, wherein the loading direction is the direction in which the rack drives the torsion shaft to rotate to torsion the workpiece.

[0041] Optionally, in the above-mentioned thermoforming apparatus, the limiting beam comprises:

[0042] Support beam;

[0043] A sliding member is slidably disposed on the support beam and can be locked at different positions of the sliding stroke to adjust the distance to the end of the rack.

[0044] The thermoforming apparatus provided by this invention includes a heating device, a platform assembly, a torsion fixing device assembly, a torsion shaft assembly, and a drive mechanism. The heating device heats the portion of the workpiece to be torsion-formed; the platform assembly places the workpiece or heating device and moves the heating device or workpiece to align the heating device with or remove it from the portion to be torsion; the torsion fixing device assembly has a slot for engaging with the workpiece to position the starting torsion; the torsion shaft assembly includes a fixed base and a torsion shaft rotatably connected to the fixed base, with a positioning part at one end for positioning the workpiece; the output end of the drive mechanism is connected to the torsion shaft to drive its rotation.

[0045] The thermoforming apparatus provided by this invention first heats the part of the workpiece to be twisted, i.e., it uses local heating. Once heated to a certain temperature, the platform assembly moves the heating device or the workpiece, removing the heating device from the part to be twisted, facilitating subsequent twisting of the workpiece. During twisting, the slot of the twisting fixing device is engaged with the workpiece, and one end of the workpiece is fixed to the twisting shaft. When the output end of the drive mechanism drives the twisting shaft to rotate, the twisting shaft causes the workpiece to twist accordingly. The slot can position the starting position of the twist, ensuring precise twisting of the workpiece at the desired location. In summary, the thermoforming apparatus provided by this application replaces the gas furnace with local heating of the heating components, reducing energy consumption and operation waiting time. Furthermore, operators do not need to work in a high-temperature environment, improving the working environment. Correspondingly, there is no need to hold the high-temperature workpiece inside the gas furnace, enhancing operational safety. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a conventional pedal body;

[0048] Figure 2 This is a schematic diagram of the structure of a thermoforming apparatus according to a specific embodiment of the present invention;

[0049] Figure 3 for Figure 2 A schematic diagram of the structure of the platform;

[0050] Figure 4 A schematic diagram of the platform's material feeding process;

[0051] Figure 5 This is a schematic diagram of the torsion forming state;

[0052] Figure 6 for Figure 2 Schematic diagram of the drive mechanism;

[0053] Figure 7 for Figure 2 Schematic diagram of the structure of the torsion shaft.

[0054] The following labels are shown in the attached diagram:

[0055] Torsion section 01;

[0056] Heating device 100, platform assembly 200, torsion fixing device assembly 300, torsion shaft assembly 400, drive mechanism 500, frame assembly 600, platform drive component 700, and limiting beam assembly 800.

[0057] Support assembly 210, push drive component 220, front stop component 201, moving stop 211, support panel 212, moving stop drive component 213, support base plate 211-1, moving side stop 211-2, plastic plate 202, side stop component 203.

[0058] Card slot 301, card holder 310, card plate 320, clamping drive component 330, clamping guide sleeve 340, clamping guide rod 350;

[0059] Fixed base 410, torsion shaft 420, positioning part 421, bushing 430;

[0060] Mounting base 510, rack 520, gear 530, loading drive component 540, rack guide sleeve 550, rack guide rod 560, upper fixing plate 570, rack fixing seat 580, lower fixing plate 590;

[0061] Support beam 810, sliding component 820; Figure 4 and Figure 5 The frame components are not shown. Detailed Implementation

[0062] This invention discloses a thermoforming apparatus to reduce energy consumption and operation waiting time, and improve personnel safety.

[0063] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] The thermoforming apparatus provided in this application is applicable to, but not limited to, the forming and manufacturing of general-purpose A-type foot pedals for railway freight cars. Car models equipped with this type of foot pedal include C70 open wagons, C80 open wagons, C70E open wagons, X70 flatcars, and SQ6 automobile transport cars.

[0065] Please see Figures 1-7 , Figure 2 This is a schematic diagram of the structure of a thermoforming apparatus according to a specific embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure of the platform; Figure 4 A schematic diagram of the platform's material feeding process; Figure 5 This is a schematic diagram of the torsion forming state; Figure 6 for Figure 2 Schematic diagram of the drive mechanism; Figure 7 for Figure 2 Schematic diagram of the structure of the torsion shaft.

[0066] In one embodiment, the thermoforming apparatus provided by the present invention includes a heating device 100, a platform assembly 200, a torsion fixing device assembly 300, a torsion shaft assembly 400, and a drive mechanism 500. The heating device 100 is used to heat the part of the workpiece to be torsion formed, i.e., to use local heating instead of the conventional gas furnace for overall heating. The platform assembly 200 is used to place the workpiece and / or the heating device 100, and to move the heating device 100 or the workpiece so that the heating device 100 corresponds to or moves away from the part to be torsion. During the heating process, the platform assembly 200 is adjusted to align the heating device 100 with the part to be torsion, thereby heating the part to be torsion. After heating, when torsion is performed, the platform assembly 200 is adjusted to move the heating device 100 away from the part to be torsion, i.e., to offset it from the part to be torsion, thus facilitating the torsion deformation of the part to be torsion. The torsion fixing device assembly 300 has a slot 301, which is used to lock onto the workpiece to locate the starting position of the torsion. The shape of the slot 301 is set according to the shape of the workpiece. The torsion shaft assembly 400 includes a fixed base 410 and a torsion shaft 420 rotatably connected to the fixed base 410. One end of the torsion shaft 420 is provided with a positioning part 421 for positioning the workpiece. It can be understood that the positioning part 421 is used to enable one end of the workpiece to rotate synchronously with the torsion shaft 420. Its specific structure is not limited and can be a slot, a latch, etc. The output end of the drive mechanism 500 is connected to the torsion shaft 420 to drive the torsion shaft 420 to rotate.

[0067] Using the thermoforming apparatus provided by this invention, the heating device 100 first heats the part of the workpiece to be twisted, i.e., it uses local heating. Once heated to a certain temperature, the platform assembly 200 moves the heating device 100 or the workpiece, causing the heating device 100 to move out of the part to be twisted, facilitating subsequent twisting of the workpiece. During twisting, the slot 301 of the twisting fixing device is engaged with the workpiece, and one end of the workpiece is fixed to the twisting shaft 420. When the output end of the drive mechanism 500 drives the twisting shaft 420 to rotate, the twisting shaft 420 causes the workpiece to twist accordingly. The slot 301 can position the starting position of the twist, ensuring precise twisting of the workpiece's twisted position. In summary, the thermoforming apparatus provided by this application uses local heating of the heating assembly instead of a gas furnace, reducing energy consumption and operation waiting time. Operators do not need to work in a high-temperature environment, improving the working environment. Correspondingly, there is no need to hold the high-temperature workpiece inside the gas furnace, improving operational safety. Furthermore, the above heating method is less prone to over-ablation, thus eliminating the need to remove oxide scale, further reducing costs.

[0068] In one embodiment, see Figure 3The platform assembly 200 includes a support component 210 and a pusher drive component 220. The support component 210 supports the workpiece and has a front stop 201 to limit the workpiece's movement towards the end of the torsion shaft assembly 400. The pusher drive component 220 is located on the support component 210, and its output end pushes the workpiece towards the end of the torsion shaft assembly 400. In this embodiment, the platform assembly 200 can move the workpiece, causing it to move from the point to be torsion corresponding to the heating device 100 to the point to be displaced from the heating device 100. During operation, the operator places the workpiece on the support component 210, specifically by pressing the rear end of the workpiece against the output end of the pusher drive component 220. The pusher drive component 220 acts as a positioning element during loading, aligning the heating device 100 with the point to be torsion for heating. After heating is complete, the output end of the pusher drive component 220 pushes the workpiece towards the torsion shaft assembly 400, causing the workpiece to move relative to the heating device 100, thus displacing it and removing the part of the workpiece to be torsion from the heating device 100. Simultaneously, the front stop 201 limits the movement of the workpiece; its position should allow the workpiece to move out of the heating device 100. The pusher drive component 220 can be a telescopic cylinder or a motor, and the torque output from the motor can be converted into linear motion via a transmission screw or other transmission component, thereby pushing the workpiece to move. In other embodiments, the heating device 100 can be mounted on the support assembly 210 and driven by a corresponding drive device to rise and fall relative to or away from the part of the workpiece to be torsion, or the heating device 100 can be driven to move away from the torsion shaft assembly 420 to remove the part to be torsion.

[0069] In one embodiment, the support assembly 210 is provided with side stops 203 for positioning the two sides of the workpiece to determine its initial position. When the workpiece is a pedal body, the two support arms corresponding to the U-shaped opening of the pedal body can each be provided with side stops 203 to achieve precise positioning.

[0070] In one embodiment, the distance between the front stop 201 and the torsion shaft assembly 400 is adjustable. That is, the front stop 201's position on the support assembly 210 is adjustable to accommodate workpieces of different specifications. For example, if the workpiece is a pedal body, the lengths of the two support arms corresponding to the U-shaped opening may differ for different specifications of pedal bodies. Therefore, by adjusting the position of the front stop 201 to adapt to support arms of different specifications, the workpiece is pushed to a suitable position by the pusher drive component 220 under the constraint of the front stop 201 for subsequent torsion.

[0071] Furthermore, the front bumper 201 is bolted to the support assembly 210. The support assembly 210 has multiple bolt holes, and the front bumper 201 can optionally be connected to different bolt holes to adjust its distance from the torsion shaft assembly 400. Alternatively, a strip-shaped hole can be provided on the support assembly 210, through which bolts pass to lock the front bumper 201 to the support assembly 210, allowing the position of the front bumper 201 to be adjusted back and forth along the strip-shaped hole.

[0072] In one embodiment, the distance between the pusher drive component 220 and the torsion shaft assembly 400 is adjustable. The pusher drive component 220 can play a positioning role during loading, and thus, by adjusting its initial position, it can accommodate workpieces of different specifications. Specifically, the connection method between the pusher drive component 220 and the support assembly 210 can be the same as the connection method between the front stop component 201 and the support assembly 210, so as to achieve front and rear position adjustment.

[0073] In one embodiment, the support assembly 210 includes a movable stop 211, a support panel 212, and a movable stop driving component 213. The movable stop 211 supports one end of the workpiece; the support panel 212 is disposed opposite to the movable stop 211 and located at the end of the movable stop 211 away from the torsion axis assembly 400, supporting the other end of the workpiece. The front stop 201, the pusher driving component 220, and the heating device 100 are all disposed on the support panel 212. The movable stop driving component 213 is disposed on the support panel 212, and its output end is connected to the movable stop 211 to drive the movable stop 211 to move closer to or away from the torsion axis assembly 400. The moving stop 211, relative to the supporting panel 212, moves closer to or further away from the torsion shaft assembly 400 under the action of the moving stop drive component 213. During heating, the moving stop drive component 213 drives the moving stop 211 to an extended state, i.e., close to the torsion shaft assembly 400, thus reliably supporting the end of the workpiece near the torsion shaft assembly 400. During torsion, the moving stop drive component 213 drives the moving stop 211 to a retracted state, i.e., away from the torsion shaft assembly 400, causing the moving stop 211 to retract relative to the end of the workpiece near the torsion shaft assembly 400. When the workpiece approaches the torsion shaft assembly 400 under the action of the pusher drive component 220, the moving stop 211 can move out of the torsion position to avoid interference with the torsion. The moving stop drive component 213 can be a cylinder, hydraulic cylinder, or other telescopic cylinder, or a motor, and the torque output by the motor is converted into linear motion through a transmission screw or other transmission component, thereby driving the moving stop 211 to move back and forth. In other embodiments, where the workpiece can be supported by an integrated support component 210 without affecting the workpiece's torsion, the support component 210 can also be an integrated plate.

[0074] In one embodiment, the movable stop 211 includes a supporting base plate 211-1 and a movable side stop 211-2 disposed on the supporting base plate 211-1. The movable side stop 211-2 is used to limit the end of the workpiece. Thus, the supporting base plate 211-1 can support the workpiece, and the movable side stop 211-2 can limit the side of the workpiece. In addition, when the workpiece is a foot pedal, movable stops 211 can be respectively provided for the two support arms corresponding to the U-shaped opening of the foot pedal. This provides support and limitation while allowing for quality inspection of the width of the U-shaped opening, making it easier to identify defective products.

[0075] In one embodiment, the thermoforming apparatus further includes a frame assembly 600 and a platform drive component 700. The frame assembly 600 serves as the main support structure. The platform assembly 200 is slidably mounted on the frame assembly 600. The torsion fixing device assembly 300, the torsion shaft assembly 400, and the drive mechanism 500 are all mounted on the frame assembly 600. The platform drive component 700 is mounted on the frame assembly 600, and its output end is connected to the platform assembly 200 to drive the platform assembly 200 to move closer to or away from the torsion shaft assembly 400. That is, the platform assembly 200 is movable, capable of moving along the frame assembly 600 closer to or away from the torsion shaft assembly 400, thereby driving the support assembly 210 and the pusher drive component 220 on it to move as a whole. After heating, this allows the workpiece to move closer to the torsion shaft 420, so that the front end of the workpiece is inserted into the positioning part 421 of the torsion shaft 420. Specifically, the platform drive component 700 may be hinged to the frame assembly 600. Platform assembly 200 and frame assembly 600 can be connected and constrained via linear guide rails. After heating, the output end of the pusher drive component 220 pushes the workpiece towards the torsion shaft assembly 400, causing the workpiece to move relative to the heating device 100 and offset from it. Then, the platform drive component 700 can push the platform assembly 200 laterally to approach the torsion shaft assembly 400, so that one end of the workpiece engages with the torsion shaft 420 of the torsion shaft assembly 400, thereby enabling it to be torsion. After torsion, the platform drive component 700 can push the platform assembly 200 laterally away from the torsion shaft assembly 400, so that one end of the workpiece exits the torsion shaft assembly 400, facilitating unloading. In this embodiment, after heating, the pusher drive component 220 pushes the workpiece towards the torsion shaft 420, causing the part of the workpiece to be torsion to displace out of the heating device 100. The platform drive component 700 then pushes the platform assembly 200 to move, causing the front end of the workpiece to enter or exit the positioning part 421 of the torsion shaft 420. The platform drive component 700 can be a telescopic cylinder such as a pneumatic cylinder or hydraulic cylinder, or a motor. The torque output by the motor is converted into linear motion via a transmission screw or other transmission component, thereby driving the platform assembly 200 to move. In other embodiments, the platform drive component 700 may be omitted. In this case, the material pusher drive component 220 can be used to push the material into the positioning part 421 of the torsion shaft 420 for torsion. After torsion, the material can be manually pulled back for unloading, or the material pusher drive component 220 can be used to pull the workpiece back via a hook or other structure.

[0076] In a platform assembly 200 comprising a pusher drive component 220, a moving stop 211, a support panel 212, and a moving stop drive component 213, where the pusher drive component 220, the moving stop drive component 213, and the platform drive component 700 all employ telescopic cylinders, taking the workpiece as a foot pedal as an example, the loading and heating process is as follows: The operator places the U-shaped foot pedal into the area restricted by each positioning stop in the mobile platform assembly 200, with the rear end of the foot pedal pressed against the pusher drive component 220. The piston rod of the moving stop drive component 213 is in a fully extended state, and the piston rod of the pusher drive component 220 is in a fully retracted state. This is the initial state, as shown below. Figure 3 As shown, the heating element heats the pedal body portion it covers.

[0077] The feeding and clamping process is as follows: Figure 4 As shown, after the pedal body is heated to a suitable temperature, the platform assembly 200 moves along direction A, close to the torsion shaft assembly 400, under the push of the platform drive component 700. Simultaneously, the piston rod of the pusher drive component 220 extends, pushing the pedal body along direction B, away from the torsion shaft assembly 400, until it stops at the front stop 201. The piston rod of the shift drive component 213 fully retracts along direction D, away from the torsion shaft assembly 400. At this point, the platform assembly 200 stops moving, and the torsion shaft 420 fixing device moves along direction C to lock the pedal body in place. After locking, as... Figure 5 As shown, the torsion shaft 420 is rotated by the drive mechanism 500, thereby torsioning the workpiece.

[0078] The reset and unloading process is as follows: After the torsion forming is completed, platform assembly 200 first resets, that is, all actions in the above feeding and clamping process are executed along the original component. Figure 4 As shown in the diagram, the operator removes the workpiece, while the drive mechanism 500 resets, preparing for the next torsional forming process. Except for loading and unloading, all processing actions can be completed automatically by the device, significantly reducing labor costs.

[0079] In one embodiment, the heating device 100 includes an electromagnetic induction coil. The electromagnetic induction coil is mounted on the platform assembly 200 and locally heats the workpiece before it enters the torsion shaft assembly 400. The electromagnetic induction coil has high heating efficiency and good local heating effect. Specifically, the electromagnetic induction coil can be mounted on a plastic plate 202. In other embodiments, the heating device 100 can also use an electric heating tube, which can also achieve the effect of local heating.

[0080] In one embodiment, see Figure 4The torsion fixing device 300 comprises a clamping seat 310, a clamping plate 320, and a clamping drive component 330. The clamping plate 320 is slidably disposed on the clamping seat 310, and a clamping groove 301 is formed in the clamping seat 310. The output end of the clamping drive component 330 is connected to the clamping plate 320 to drive the clamping plate 320 to clamp outside or away from the workpiece. The clamping drive component 330 drives the clamping plate 320 to descend, clamping it outside the workpiece, thus determining the starting point of the torsion forming. After torsion is completed, the clamping drive component 330 drives the clamping plate 320 to rise, facilitating workpiece unloading. The clamping drive component 330 can be a telescopic cylinder such as a pneumatic cylinder or hydraulic cylinder, or a motor, and converts the torque output by the motor into linear motion through a transmission screw or other transmission component, thereby driving the clamping plate 320 to move.

[0081] In one embodiment, the card holder 310 is provided with a clamping guide sleeve 340, and the card plate 320 is provided with a clamping guide rod 350. The clamping guide rod 350 is inserted into the clamping guide sleeve 340 and moves along the clamping guide sleeve 340. The cooperation between the clamping guide sleeve 340 and the clamping guide rod 350 limits and guides the movement of the card plate 320.

[0082] In one embodiment, see Figure 6 The drive mechanism 500 includes a mounting base 510, a rack 520, a gear 530, and a loading drive component 540. The rack 520 is slidably mounted on the mounting base 510; the gear 530 meshes with the rack 520 and is fixedly connected to the torsion shaft 420; the output end of the loading drive component 540 is connected to the rack 520 to drive the rack 520 to slide and rotate the gear 530. During operation, the rack 520 meshes with the gear 530. After the thermoforming device completes the feeding and clamping process, the front end of the workpiece has entered the positioning part 421 of the torsion shaft 420. At this time, the loading drive component 540 drives the rack 520 to move, specifically upwards. The rack 520 drives the gear 530 to rotate, and the gear 530 drives the torsion shaft 420 to rotate, performing torsion forming on the workpiece. The forming angle is controlled by the stroke of the rack 520. The drive mechanism 500, with the above configuration, has a simple structure and reliable operation. The loading drive component 540 can be a telescopic cylinder such as a pneumatic cylinder or a hydraulic cylinder, or it can be a motor. The torque output by the motor is converted into linear motion through a transmission component such as a lead screw, thereby driving the mounting base 510 and the rack 520 provided on the mounting base 510 to move. In other embodiments, the drive mechanism 500 can also use a motor or the like to drive the torsion shaft 420 to rotate.

[0083] In one embodiment, the drive mechanism 500 further includes a rack guide sleeve 550 and a rack guide rod 560. The rack guide sleeve 550 is disposed on the mounting base 510; the rack guide rod 560 passes through the rack guide sleeve 550, and the rack guide sleeve 550 is fixedly connected to the rack 520. The cooperation between the rack guide sleeve 550 and the rack guide rod 560 guides and limits the movement of the rack 520, making its movement smoother and ensuring the accuracy of torsional loading.

[0084] In one embodiment, the drive mechanism 500 further includes an upper fixed plate 570, a rack fixing seat 580, and a lower fixed plate 590, with the upper fixed plate 570 and lower fixed plate 590 respectively connected to the upper and lower ends of the rack fixing seat 580. A rack 520 is mounted on the rack fixing seat 580. The two ends of the guide rod can be fixedly connected to the upper fixed plate 570 and the lower fixed plate 590 respectively.

[0085] In one embodiment, the drive mechanism 500 includes two racks 520 and two corresponding gears 530, and two torsion shafts 420 corresponding to the two gears 530 respectively. The loading drive component 540 can drive the two racks 520 to move synchronously, thereby causing the two gears 530 to rotate synchronously, thus simultaneously torsion the workpiece. When the workpiece is a foot pedal, it can simultaneously torsion the two arms of the foot pedal.

[0086] In one embodiment, the thermoforming apparatus further includes a limiting beam assembly 800 disposed at one end of the rack 520 in the loading direction, used to abut against the rack 520 to limit the sliding limit position of the rack 520, wherein the loading direction is the direction in which the rack 520 drives the torsion shaft 420 to rotate and torsion the workpiece. By setting the limiting beam, the loading limit of the rack 520 can be limited, that is, when the rack 520 moves to abut against the limiting beam under the drive of the loading drive component 540, its further displacement is limited. The displacement of the rack 520 can be controlled by setting the height of the limiting beam, thereby achieving precise control of the workpiece torsion angle. In other embodiments, the workpiece torsion angle can also be controlled by the output of the loading drive component 540.

[0087] In one embodiment, the limiting beam assembly 800 includes a support beam 810 and a slider 820. The slider 820 is slidably disposed on the support beam 810 and can be locked at different positions of its sliding stroke to adjust the distance to the end of the rack 520. Thus, the slider 820 facilitates the torsion of the workpiece at different angles. Specifically, the slider 820 can be a screw; by adjusting the screw's insertion depth, the displacement of the rack 520 is controlled.

[0088] In one embodiment, see Figure 7The torsion shaft assembly 400 includes two fixed seats 410 arranged opposite to each other. The torsion shaft 420 is rotatably connected to the two fixed seats 410. The positioning part 421 of the torsion shaft 420 is a positioning groove provided at one end. A bushing 430 can be fitted over the torsion shaft 420 to improve the reliability of the torsion shaft 420.

[0089] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0090] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A thermoforming apparatus, characterized in that, include: The heating device (100) uses local heating to heat the part of the workpiece to be twisted; The platform assembly (200) is used to place the workpiece and / or the heating device (100) and to move the heating device (100) or the workpiece so that the heating device (100) corresponds to or moves away from the part to be twisted. The torsion fixing device consists of (300) having a slot (301) for locking onto the workpiece to position the torsion start position; The torsion shaft assembly (400) includes a fixed base (410) and a torsion shaft (420) rotatably connected to the fixed base (410). One end of the torsion shaft (420) is provided with a positioning part (421) for positioning the workpiece. A drive mechanism (500) is provided, the output end of which is connected to the torsion shaft (420) to drive the torsion shaft (420) to rotate. The frame assembly (600) includes a platform assembly (200) slidably disposed on the frame assembly (600), and the torsion fixing device assembly (300), the torsion shaft assembly (400), and the drive mechanism (500) are all disposed on the frame assembly (600). A platform drive component (700) is provided on the frame assembly (600), and the output end of the platform drive component (700) is connected to the platform assembly (200) to drive the platform assembly (200) to move closer to or away from the torsion shaft assembly (400); The heating device (100), the torsion fixing device (300), and the torsion shaft (400) are arranged in sequence. The platform components (200) include: A support assembly (210) is provided for supporting the workpiece, and the support assembly (210) is provided with a front stop (201) for limiting the movement limit of the workpiece towards one end of the torsion shaft assembly (400). A pusher drive component (220) is provided on the support assembly (210), and the output end of the pusher drive component (220) is used to push the workpiece toward one end near the torsion shaft assembly (400); The support component (210) includes: A movable stop (211) is used to support one end of the workpiece; A support panel (212) is disposed opposite to the moving stop (211) and located at one end of the moving stop (211) away from the torsion shaft assembly (400), for supporting the other end of the workpiece. The front stop (201), the pusher drive component (220) and the heating device (100) are all disposed on the support panel (212). A shift drive component (213) is provided on the support panel (212), and the output end of the shift drive component (213) is connected to the shift (211) to drive the shift (211) to move closer to or away from the torsion shaft assembly (400).

2. The thermoforming apparatus according to claim 1, characterized in that, The distance between the front stop (201) and the torsion shaft assembly (400) is adjustable, and / or the distance between the pusher drive component (220) and the torsion shaft assembly (400) is adjustable.

3. The thermoforming apparatus according to claim 1, characterized in that, The movable stop (211) includes a support base plate (211-1) and a movable side stop (211-2) provided on the support base plate (211-1). The movable side stop (211-2) is used to limit the end of the workpiece.

4. The thermoforming apparatus according to any one of claims 1-3, characterized in that, The heating device (100) includes an electromagnetic induction coil.

5. The thermoforming apparatus according to any one of claims 1-3, characterized in that, The torsion fixing device (300) comprises: Booth (310); A card plate (320) is slidably disposed on the card holder (310), and a card slot (301) is formed in the card holder (310). A clamping drive component (330) is provided, the output end of which is connected to the clamping plate (320) to drive the clamping plate (320) to clamp outside or away from the workpiece.

6. The thermoforming apparatus according to any one of claims 1-3, characterized in that, The drive mechanism (500) includes: Mounting bracket (510); A rack (520) is slidably disposed on the mounting base (510); A gear (530) meshes with a rack (520), and the gear (530) is fixedly connected to the torsion shaft (420); A loading drive component (540) is provided, the output end of which is connected to the rack (520) to drive the rack (520) to slide and drive the gear (530) to rotate.

7. The thermoforming apparatus according to claim 6, characterized in that, The drive mechanism (500) further includes: A rack guide sleeve (550) is provided on the mounting base (510); A rack guide rod (560) is inserted through the rack guide sleeve (550), and the rack guide sleeve (550) is fixedly connected to the rack (520).

8. The thermoforming apparatus according to claim 6, characterized in that, The drive mechanism (500) includes two racks (520) and two corresponding gears (530), and includes two torsion shafts (420) corresponding to the two gears (530) respectively.

9. The thermoforming apparatus according to claim 6, characterized in that, Also includes: A limiting beam (800) is provided at one end of the rack (520) in the loading direction, and is used to abut against the rack (520) to limit the sliding limit position of the rack (520), wherein the loading direction is the direction in which the rack (520) drives the torsion shaft (420) to rotate to torsion the workpiece.

10. The thermoforming apparatus according to claim 9, characterized in that, The limiting beam assembly (800) includes: Support beam (810); A sliding member (820) is slidably disposed on the support beam (810) and can be locked at different positions of the sliding stroke to adjust the distance to the end of the rack (520).

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