Machining and stamping device and method for angle steel of power transmission tower

Abstract

The invention belongs to the technical field of transmission tower accessory machining, and discloses a machining stamping device and method for transmission tower angle steel. The stamping device comprises a bottom table, a lower stamping die is installed at the top end of the bottom table, a hydraulic stamping assembly is installed at the position, above the lower stamping die, of the top end of the bottom table, a sheet feeding assembly is installed on one side of the bottom table, and at least two supporting tables are installed at the bottom of the bottom table in the length direction. Two symmetrically-arranged elastic self-retreating type part feeding assemblies are arranged above each supporting table, the elastic self-retreating type part feeding assemblies are arranged on the front side and the rear side of the lower stamping die, and pin groove sliding type opposite-pulling assemblies used for driving the two elastic self-retreating type part feeding assemblies in the same width direction to move oppositely are installed at the top ends of the supporting tables. And a linear pushing driving assembly used for driving the multiple pin groove sliding type opposite-pulling assemblies to synchronously work is installed at the bottom of the bottom table, the long-specification metal sheet can be subjected to the procedures of feeding, centering, stamping and discharging, and long-specification angle steel is prepared.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power transmission tower accessory processing, in particular to a processing and stamping device for power transmission tower angle steel and a method thereof. BACKGROUND

[0002] The long-specification L-shaped angle steel stamping device is the core equipment in the manufacture of iron towers, and its core role is to accurately and efficiently punch, bend and form long-size L-shaped angle steel to meet the strict requirements of iron tower structure on connecting hole positions and specific shapes. The stamping die is the core part of the stamping device, which is designed precisely and durably to meet complex processing requirements. The control system is responsible for the coordination and automation of the entire stamping process, ensuring accurate control of feeding speed and stamping force, thereby improving production efficiency and processing accuracy. When the device is working, the feeding mechanism first accurately feeds the long-specification metal plate into the processing station and positions it. Then the control system controls the downward movement of the stamping head, which cooperates with the die to complete the blanking or bending deformation. After the stamping head resets, the processed angle steel is removed, and a new angle steel is immediately fed in, and the cycle continues.

[0003] A Chinese invention patent with patent application number CN202510694034.3 discloses a processing and stamping device for power transmission tower angle steel and a method thereof, which includes a punch press. A steel running frame is arranged on one side of the punch press. An upper and lower parallel arranged lifting pressure roller assembly and a lower main drive roller assembly are installed on the steel running frame. A return frame is fixedly installed on the side of the steel running frame away from the punch press. A plurality of supporting rollers are rotatably installed at the top of the return frame. Elastic force adding type swing arm assemblies are installed at the front and rear edge positions of the top of the return frame. The elastic force adding type swing arm assemblies are installed with a sand belt grinding assembly on the side close to the vertical center reference surface of the return frame. The sand belt grinding assembly is used for stamping operation on the L-shaped angle steel. The L-shaped angle steel after stamping is conveyed to the supporting rollers by the cooperation of the lifting pressure roller assembly and the lower main drive roller assembly, and the outer wall surface of the L-shaped angle steel is deburred and ground by the sand belt grinding assembly.

[0004] The above technical solution mainly uses the lifting pressure roller assembly, the lower main drive roller assembly and the plurality of supporting rollers with flanges to complete the feeding and discharging of the long-specification workpiece when stamping the long-specification metal sheet into angle steel. However, for long-specification metal sheets, the position may shift during the conveying process due to the toughness of the metal sheet itself and the conveying vibration. That is, under the continuous conveying vibration, especially the inertial impact when starting and stopping, the sheet may produce slight lateral swing or axial movement. Although the flanges can block the large lateral movement, the constraint force is insufficient for the small and cumulative deviation. This leads to inaccurate bending line position of the long-specification sheet during bending forming, resulting in the key dimensions such as leg length and angle of the angle steel being out of tolerance, which affects the quality of the final product. SUMMARY

[0005] The utility model aims at providing a kind of processing stamping device and its method for power transmission tower angle steel, long specification sheet metal piece to be stamped into angle steel is conveyed to the lower stamping die along the length direction by sheet piece loading assembly, in the process, by control panel, linear displacement drive assembly drives pin slot sliding type counter pulling assembly to work, pin slot sliding type counter pulling assembly promotes the two elastic self-retreating type workpiece feeding assemblies in the front-back direction of lower stamping die to be close, until the two elastic self-retreating type workpiece feeding assemblies contact long specification sheet piece, after the centering of long specification sheet piece is completed, hydraulic stamping assembly is stamped into angle steel, after angle steel is formed, hydraulic stamping assembly resets, and elastic self-retreating type workpiece feeding assembly continues to contact angle steel, and angle steel is sent out from lower stamping die along the length direction, to solve the problems raised in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of processing stamping device for power transmission tower angle steel, including base, lower stamping die is fixedly installed at the top of base, hydraulic stamping assembly is installed at the top of base above lower stamping die, sheet piece loading assembly for sending long specification sheet metal piece between hydraulic stamping assembly and lower stamping die is installed on one side of base, at least two support platforms are installed along the length direction at the bottom of base, two elastic self-retreating type workpiece feeding assemblies symmetrically in mirror image structure are arranged above each support platform, elastic self-retreating type workpiece feeding assembly is located at the front and back of lower stamping die in width direction, pin slot sliding type counter pulling assembly for driving two elastic self-retreating type workpiece feeding assemblies in the same width direction to move towards each other is installed at the top of support platform, linear displacement drive assembly for driving multiple pin slot sliding type counter pulling assemblies in length direction to work synchronously is installed at the bottom of base, control panel is installed on one side of base, the control output end of control panel is electrically connected with the control input end of hydraulic stamping assembly, sheet piece loading assembly, elastic self-retreating type workpiece feeding assembly and linear displacement drive assembly.

[0007] The following is further optimization of the technical scheme of the utility model: The hydraulic stamping assembly includes F-shaped double-layer steel frame fixed at the left and right positions at the top of base, layer plate is fixedly installed between the two F-shaped double-layer steel frames, hydraulic cylinder is fixedly installed at the top center position of layer plate, and stamping seat is fixed to the lower end of the piston rod of hydraulic cylinder.

[0008] Further optimization: guide rod is slidably installed at the corner position of the top of layer plate along Z-axis direction, upper beam frame is fixed to the lower end of guide rod, and upper beam frame is fixedly connected with stamping seat.

[0009] Further optimization: the linear movement drive assembly comprises vertical plates fixed at the left and right positions of the bottom of the base table, long beam plates are fixedly installed at the top ends of the two vertical plates, a single sliding table is slidingly installed on the lower surface of the long beam plate, and a straight slot is formed in one side of the surface of the single sliding table.

[0010] Further optimization: one end of the back surface of the long beam plate is provided with a servo motor, the driving shaft end of the servo motor penetrates to the outside of the long beam plate and is provided with a cantilever, the other end of the cantilever is rotatably provided with a No. 2 pin rod, and the No. 2 pin rod penetrates to the outside of the straight slot. The control input end of the servo motor is electrically connected with the control output end of the control panel.

[0011] Further optimization: the pin slot sliding type counter pulling assembly comprises lower sliding plates slidingly installed at the lower top of the support table along the length direction of the long beam plate, two double set type sliding tables are symmetrically slidingly installed at the top end of the support table along the width direction of the lower punch die, oblique grooves are formed at the front and rear positions of the bottom end of the lower sliding plate, a No. 1 pin rod is rotatably installed at the bottom end of the double set type sliding table, and the lower end of the No. 1 pin rod extends to the inside of the corresponding oblique groove.

[0012] Further optimization: the bottom ends of the adjacent two lower sliding plates are fixedly connected with a connecting beam, the connecting beam is arranged in parallel with the long beam plate, and the back surfaces of the connecting beam and the long beam plate are slidingly matched.

[0013] Further optimization: the elastic self-retreating type feeding assembly comprises a square hollow seat fixed on the outer wall of the pin slot sliding type counter pulling assembly close to the lower punch die, a double-layer wheel frame is elastically and slidingly installed in the square hollow seat, a rubber wheel is rotatably installed on the outer wall of the side of the double-layer wheel frame away from the square hollow seat, and a motor for driving the rubber wheel to rotate is installed on the other outer wall of the double-layer wheel frame. The control input end of the motor is electrically connected with the control output end of the control panel.

[0014] Further optimization: at least one spring is installed on the inner wall of the side of the square hollow seat, and the other end of the spring is fixedly connected with the double-layer wheel frame.

[0015] The application also provides a processing and stamping method for a power transmission tower angle steel, based on the processing and stamping device for the power transmission tower angle steel, and comprises the following steps: S101: The long-specification metal sheet to be processed is stably placed on the conveying position of the sheet feeding assembly, and the initial position of the long-specification metal sheet is ensured to be roughly aligned with the direction of the lower punch die, so that the long-specification metal sheet is continuously fed to the lower punch die by the sheet feeding assembly. S102: In the process of feeding, the linear movement driving assembly is controlled to work through the control panel, the linear movement driving assembly synchronously provides power for a plurality of pin and groove sliding pull assemblies, the pin and groove sliding pull assemblies convert the linear driving force into precise transverse movement through the cooperation of the pins and the grooves, thereby synchronously driving the two elastic self-retreating feeding assemblies on the front and rear sides of the lower stamping die to approach each other, the two elastic self-retreating feeding assemblies approach the long-specification metal sheet from both sides of the width direction of the workpiece at a constant speed, until the roller part of the elastic self-retreating feeding assembly stably abuts against the two long side edges of the sheet with a preset contact force, so as to perform the centering operation of the workpiece; S103: After the centering is stable, the hydraulic stamping assembly receives the control instruction of the control panel, the punch carried by the hydraulic stamping assembly moves downward from the upper side with great pressure, and the long-specification metal sheet that has been accurately positioned is pressed into the cavity of the lower stamping die to form an L-shaped angle steel with a preset angle; S104: After the stamping operation is completed, the roller part of the elastic self-retreating feeding assembly still contacts the long side edge of the angle steel after the position adjustment operation, and then the elastic self-retreating feeding assembly starts the push-out mechanism to stably push the formed angle steel along the length direction out of the working surface of the hydraulic stamping assembly under the control of the control panel.

[0016] The present application has at least the following beneficial effects: 1、The present application can feed the long-specification metal sheet to the lower stamping die along the length direction through the sheet feeding assembly, in the process, the pin and groove sliding pull assembly is driven to work through the control panel and the linear movement driving assembly, the pin and groove sliding pull assembly drives the two elastic self-retreating feeding assemblies in the front and rear directions of the lower stamping die to move towards each other until the two elastic self-retreating feeding assemblies contact the long-specification sheet, after the centering of the long-specification sheet is completed, the workpiece is stamped into an angle steel by the hydraulic stamping assembly, after the angle steel is formed, the hydraulic stamping assembly is reset, the roller part of the elastic self-retreating feeding assembly continues to contact the angle steel after the position adjustment, and the angle steel is fed out of the lower stamping die along the length direction, so that the accurate centering and stable clamping operation of the long-specification metal sheet are realized, and the high-quality stamping forming and continuous conveying task are completed by combining the linear movement driving and the hydraulic stamping system, so that the key shape and position tolerances such as the bending angle and the straightness of the long-specification angle steel are strictly controlled, and the consistency and quality of the product are significantly improved.

[0017] 2、The linear push driving assembly in the application drives the multiple pin slot slip type pull assembly in the length direction to work synchronously, at this time, the pin slot slip type pull assembly drives the elastic self-retreating type feeding assembly in each group to actively approach and contact the plate from the width direction, realizes the precise "centering" operation, ensures that the center line of the long specification plate can be accurately overlapped with the center line of the lower stamping die before entering the final stamping position, thereby eliminating the cumulative error caused by the initial inaccurate placement or the snake-shaped deviation in the conveying process, compared with the static guide, can effectively compensate the slight bending or width tolerance of the plate, lays the foundation for the subsequent high-precision stamping forming, and guarantees the accuracy of the angle steel forming size from the source.

[0018] 3、The elastic self-retreating type feeding assembly in each group in the application contacts the workpiece again after the plate centering operation is completed until the stamping action is completed, so that the workpiece continues to be pushed out as the pushing mechanism, and the finished angle steel is smoothly fed out of the lower stamping die along the length direction, thereby omitting the independent taking-out or ejection device in the prior art, simplifying the mechanical structure, so that sufficient contact force can be provided to realize reliable clamping and conveying of the plate, the feeding task can be completed, human intervention is effectively reduced, the production efficiency is improved, and the risk of quality fluctuation caused by improper manual operation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The three-dimensional structure of the embodiment of the application is shown Figure 1 ; Figure 2 The three-dimensional structure of the embodiment of the application is shown Figure 2 ; Figure 3 The three-dimensional structure of the embodiment of the application is shown Figure 3 ; Figure 4 The front view of the overall structure in the embodiment of the application is shown Figure 5 The three-dimensional view of the overall structure in the embodiment of the application is shown Figure 6 The three-dimensional view of the hydraulic stamping assembly in the embodiment of the application is shown Figure 7 The side view of the overall structure in the embodiment of the application is shown Figure 8 The structure diagram of the linear push driving assembly in the embodiment of the application is shown Figure 9 The structure diagram of the elastic self-retreating type feeding assembly in the embodiment of the application is shown Figure 10 The structure diagram of the pin slot slip type pull assembly in the embodiment of the application is shown

[0020] In the diagram: 1-Base platform; 101-Upright plate; 2-Hydraulic stamping assembly; 201-F-type double-layer steel frame; 202-Shelf plate; 203-Hydraulic cylinder; 204-Guide rod; 205-Upper beam frame; 206-Stamping seat; 3-Lower stamping die; 4-Sheet metal feeding assembly; 5-Support platform; 6-Pin slot sliding tie assembly; 601-Double-sleeve slide table; 602-Lower slide plate; 603-No. 1 pin; 60 4- Inclined slot; 605- Connecting beam; 7- Elastic self-retracting feeding assembly; 701- Square hollow seat; 702- Double-layer wheel frame; 703- Motor; 704- Rubber wheel; 705- Spring; 8- Linear push drive assembly; 801- Long beam plate; 802- Servo motor; 803- Single sliding table; 804- Straight slot; 805- Cantilever; 806- No. 2 pin; 9- Control panel. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Depend on Figures 1-5 As shown, a processing and stamping device for angle steel of power transmission towers includes a base platform 1. A lower stamping die 3 is fixedly installed on the top of the base platform 1. A hydraulic stamping assembly 2 is installed on the top of the base platform 1 above the lower stamping die 3. A plate feeding assembly 4 for feeding long metal plates between the hydraulic stamping assembly 2 and the lower stamping die 3 is installed on one side of the base platform 1. At least two support platforms 5 are installed along the length direction at the bottom of the base platform 1. Two elastic self-retracting feeding assemblies 7 with mirror structure are provided above each support platform 5. The elastic self-retracting feeding assemblies 7 are located on the front and rear sides of the lower stamping die 3 in the width direction. A pin-slot sliding counter-pull assembly 6 is installed on the top of the support platform 5 for driving the two elastic self-retracting feeding assemblies 7 in the same width direction to move towards each other. A linear push drive assembly 8 is installed at the bottom of the base platform 1 for driving multiple pin-slot sliding counter-pull assemblies 6 in the length direction to work synchronously.

[0023] In this embodiment, the base platform 1 serves as the basic structure of the entire device, undertaking the task of supporting and fixing all mechanical components. Its structure is robust and stable, effectively absorbing and dispersing the vibration and impact generated during the stamping process, ensuring the overall rigidity and stability of the equipment. The plate feeding assembly 4 is responsible for smoothly feeding long metal plates along the length direction between the lower stamping die 3 and the hydraulic stamping assembly 2.

[0024] The control panel 9 is installed on one side of the base table 1, and the control output end of the control panel 9 is electrically connected with the control input end of the hydraulic stamping assembly 2, the plate feeding assembly 4, the elastic self-retreating feeding assembly 7 and the linear pushing driving assembly 8; the control panel 9 outputs control signals for independently controlling the corresponding hydraulic stamping assembly 2, plate feeding assembly 4, elastic self-retreating feeding assembly 7 and linear pushing driving assembly 8 to work.

[0025] The hydraulic stamping assembly 2 comprises two F-shaped double-layer steel frames 201 fixed at the left and right positions on the top end of the base table 1, and a layer plate 202 is fixedly installed between the interiors of the two F-shaped double-layer steel frames 201; a hydraulic cylinder 203 is fixedly installed at the center position on the top end of the layer plate 202, the piston rod of the hydraulic cylinder 203 is vertically downwardly arranged, and a stamping seat 206 is fixedly connected to the lower end of the piston rod and penetrates through the layer plate 202.

[0026] The control input end of the hydraulic cylinder 203 is electrically connected with the control output end of the control panel 9, and the control panel 9 outputs control signals for controlling the hydraulic cylinder 203 to work.

[0027] When the long-specification metal plate is completed to be conveyed and is completed to be centered on the lower stamping die 3, the staff member opens the hydraulic cylinder 203 to work through the control panel 9, the stamping seat 206 is driven downwardly by the hydraulic cylinder 203, and the metal plate is deformed under the action of continuous and uniform pressure until the metal plate fills the die cavity of the lower stamping die 3 and is once formed into a qualified angle steel.

[0028] A guide rod 204 is slidingly installed at the corner position on the top end of the layer plate 202 along the Z-axis direction, and an upper beam frame 205 is fixed to the lower end of the guide rod 204 and is fixedly connected with the stamping seat 206.

[0029] In this embodiment, four guide rods 204 are arranged at the left and right positions of the layer plate 202, and the stability of the upper beam frame 205 and the stamping seat 206 when moving in the Z-axis direction is effectively ensured by the cooperation of the plurality of guide rods 204.

[0030] As shown in Figure 6 , Figure 7 , Figure 8 and Figure 10 , the linear pushing driving assembly 8 comprises two vertical plates 101 fixedly installed at the left and right positions on the bottom of the base table 1, and a long beam plate 801 is fixedly installed on the top end of the two vertical plates 101; a single sliding table 803 is slidingly installed on the lower surface of the long beam plate 801, and a straight slot 804 is formed on one side of the surface of the single sliding table 803; the straight slot 804 is vertically arranged.

[0031] In the embodiment, the single sliding table 803 is in sliding connection with the long beam plate 801, and can slide on the long beam plate 801 to adjust the position and facilitate use.

[0032] The long beam plate 801 is provided with the servo motor 802 at one end of the back surface, the driving shaft of the servo motor 802 penetrates to the outside of the long beam plate 801 and is provided with the cantilever 805, the driving shaft of the servo motor 802 is in rotary connection with the long beam plate 801, the cantilever 805 is provided with the second pin rod 806 at the other end, the second pin rod 806 penetrates to the outside of the straight slot 804, and the second pin rod 806 is in sliding fit with the straight slot 804.

[0033] The control input end of the servo motor 802 is in electrical connection with the control output end of the control panel 9; the control panel 9 outputs a control signal for controlling the servo motor 802 to work in a set direction, speed, angle and start-stop time.

[0034] In this way, when the long metal sheet is controlled to complete the centering operation by the linear pushing driving assembly 8, the pin-slot sliding type pulling assembly 6 and the elastic self-retreating type feeding assembly 7, the driving shaft of the servo motor 802 drives the cantilever 805 to rotate around the axis, the second pin rod 806 is located in the straight slot 804 of the single sliding table 803, at this time, the rotation of the cantilever 805 around the axis of the servo motor 802 forces the single sliding table 803 to slide along the length direction of the long beam plate 801, at this time, each pin-slot sliding type pulling assembly 6 in the length direction can obtain linear sliding force, so that the subsequent clamping operation can be flexibly and reliably completed.

[0035] The pin-slot sliding type pulling assembly 6 comprises a lower sliding plate 602 slidingly installed at the lower top of the support table 5 along the length direction of the long beam plate 801, two double-set type sliding tables 601 are symmetrically slidingly installed at the top of the support table 5 along the width direction of the lower stamping die 3, the front and back positions of the lower end of the lower sliding plate 602 are provided with inclined slots 604, the bottom end of the double-set type sliding table 601 is provided with a first pin rod 603, and the lower end of the first pin rod 603 extends into the corresponding inclined slot 604.

[0036] In the embodiment, the bottom end of one of the lower sliding plates 602 is fixedly connected with the top end of the single sliding table 803; when the single sliding table 803 slides on the long beam plate 801, the single sliding table 803 synchronously drives the lower sliding plate 602 to move.

[0037] The bottom ends of the adjacent two lower sliding plates 602 are fixedly connected with a connecting beam 605, the connecting beam 605 is parallelly arranged with the long beam plate 801, and the back surfaces of the connecting beam 605 and the long beam plate 801 are in sliding fit.

[0038] In the embodiment, the two adjacent lower sliding plates 602 are fixedly connected through the connecting beam 605. When one lower sliding plate 602 moves, the other lower sliding plate 602 is driven to move synchronously, so that the plurality of lower sliding plates 602 move synchronously, which is convenient to use. The connecting beam 605 and the long beam plate 801 are slidingly connected, so that the stability of the connecting beam 605 during movement is improved.

[0039] In this way, the working principle of the pin-and-groove sliding type pulling assembly 6 is that when the single sliding table 803 slides on the long beam plate 801, one of the lower sliding plates 602 in the pin-and-groove sliding type pulling assembly 6 is driven to move in the length direction, and the other lower sliding plate 602 in the pin-and-groove sliding type pulling assembly 6 is driven to move by the connecting beam 605, that is, each lower sliding plate 602 slides synchronously and in the same direction. Since the first pin rod 603 at the lower end of the double-set sliding table 601 is located in the inclined groove 604 on the lower sliding plate 602, when the lower sliding plate 602 slides to the right, the lower sliding plate 602 forces the two double-set sliding tables 601 to approach each other through the inclined groove 604 and the first pin rod 603, so that the elastic self-retracting feeding assembly 7 uniformly approaches the long-gauge metal sheet from both sides in the width direction of the workpiece at a constant speed, clamps the edge of the sheet with constant and soft force, realizes reliable positioning without hard impact, and further ensures the accurate positioning of the workpiece in the width direction.

[0040] As shown in Figure 9 The elastic self-retracting feeding assembly 7 includes a square hollow seat 701 fixed on the double-set sliding table 601 of the pin-and-groove sliding type pulling assembly 6. The square hollow seat 701 is elastically and slidingly installed with a double-layer wheel frame 702. The double-layer wheel frame 702 is rotatably installed with a rubber wheel 704 on the outer wall away from the square hollow seat 701. The double-layer wheel frame 702 is installed with a motor 703 for driving the rubber wheel 704 to rotate on the other outer wall.

[0041] In the embodiment, the power output end of the motor 703 and the driving shaft of the rubber wheel 704 are connected through a gear set. The motor 703 drives the rubber wheel 704 to rotate through the transmission of the gear set, which is convenient to use.

[0042] In the embodiment, the control input end of the motor 703 is electrically connected with the control output end of the control panel 9. The control panel 9 outputs a control signal for controlling the motor 703 to work in a set direction, speed, angle, and start-stop time.

[0043] At least one spring 705 is installed on the inner wall of one side of the square hollow seat 701. The other end of the spring 705 is fixedly connected with the double-layer wheel frame 702. The spring 705 outputs an elastic force to the double-layer wheel frame 702, so that the double-layer wheel frame 702 always has an elastic force, which is convenient to use.

[0044] In this way, the working principle of the elastic self-retreating feeding assembly 7 is that the rubber wheel 704 in the elastic self-retreating feeding assembly 7 is in contact with the long edge of the long-gauge metal sheet, when the long-gauge metal sheet is punched into an angle steel, the spring 705 is reset from the compressed state caused by the centering, so that the spring 705 pushes the double-layer wheel frame 702, the rubber wheel 704 and the motor 703 close to the outer wall surface of the angle steel, until the rubber wheel 704 is in contact with the angle steel, at this time, the worker can perform the feeding action, that is, the motor 703 is started by the control panel 9, the rubber wheel 704 is rotated by the motor 703, until the rubber wheel 704 feeds the completed angle steel out of the working surface of the lower punching die 3, realizing the effect of one machine with two functions.

[0045] The application also provides a processing and punching method for the angle steel of the power transmission tower, based on the processing and punching device for the angle steel of the power transmission tower, comprising the following steps: S101: The long-gauge metal sheet to be processed is stably placed on the conveying position of the sheet feeding assembly 4, and the initial position of the long-gauge metal sheet is ensured to be roughly aligned with the direction of the lower punching die 3, and the long-gauge metal sheet is continuously fed to the lower punching die 3 by the sheet feeding assembly 4.

[0046] S102: During the feeding process, the linear displacement driving assembly 8 is controlled to work by the control panel 9, the linear displacement driving assembly 8 synchronously provides power for the plurality of pin-and-slot sliding pulling assemblies 6, the pin-and-slot sliding pulling assembly 6 converts the linear driving force into precise transverse motion through the cooperation of the pin and the slot designed by itself, thereby synchronously driving the two elastic self-retreating feeding assemblies 7 located at the front and rear sides of the lower punching die 3 to approach each other, the two elastic self-retreating feeding assemblies 7 approach the long-gauge metal sheet at a uniform speed from both sides of the workpiece width direction, until the rollers of the elastic self-retreating feeding assemblies 7 stably abut against the two long edges of the sheet with a preset contact force, thereby performing the workpiece centering operation.

[0047] In the S102 step, the working principle of the linear displacement driving assembly 8 is that the servo motor 802 is started under the control of the control panel 9, so that the driving shaft of the servo motor 802 drives the cantilever 805 to rotate around the axis, since the No. 2 pin rod 806 is located in the straight slot 804 of the single sliding table 803, at this time, the rotation of the cantilever 805 around the axis of the servo motor 802 forces the single sliding table 803 to slide along the length direction of the long beam plate 801, at this time, each pin-and-slot sliding pulling assembly 6 in the length direction can obtain linear sliding power.

[0048] In step S102, the working principle of the pin-slot sliding type pulling assembly 6 is that the connecting beam 605 is arranged to connect the plurality of lower sliding plates 602 into one body, and when the single sliding table 803 slides on the long beam plate 801, the connecting beam 605 drives the lower sliding plates 602 to slide synchronously and in the same direction. Since the No. 1 pin rod 603 at the lower end of the double-set sliding table 601 is located in the inclined slot 604 on the lower sliding plate 602, when the lower sliding plate 602 slides to the right, the lower sliding plate 602 forces the two double-set sliding tables 601 to approach each other through the inclined slot 604 and the No. 1 pin rod 603, so as to realize that the elastic self-retreating type feeding assembly 7 uniformly approaches the long-gauge metal sheet from both sides in the width direction of the workpiece at a constant speed, clamps the edge of the sheet with constant and soft force, realizes reliable positioning without hard impact, and further guarantees the accurate positioning of the workpiece in the width direction.

[0049] S103: After the centering is stable, the hydraulic punching assembly 2 receives the control instruction of the control panel 9, the punch carries a large pressure to move downward from above, and the long-gauge metal sheet that has been accurately positioned is pressed into the cavity of the lower punching die 3 to form an L-shaped angle steel at a preset angle.

[0050] S104: After the punching action is completed, the hydraulic punching assembly 2 automatically resets and rises, at this time, the linear pushing and driving assembly 8 works again to drive the pin-slot sliding type pulling assembly 6 to drive the elastic self-retreating type feeding assembly 7 to continue to move, adjust the position, so that the roller part of the elastic self-retreating type feeding assembly 7 still contacts the long edge of the angle steel, and then the elastic self-retreating type feeding assembly 7 is started under the control of the control panel 9, so that the elastic self-retreating type feeding assembly 7 acts as a pushing mechanism to smoothly push the formed angle steel along the length direction out of the working surface of the hydraulic punching assembly 2.

[0051] In step S104, the working principle of the elastic self-retreating type feeding assembly 7 is that the rubber wheel 704 contacts the long edge of the angle steel in contact, the control panel 9 outputs a control signal for controlling the motor 703 to work at a set direction, speed, angle, start-stop time, the motor 703 drives the rubber wheel 704 to rotate, and at this time, the rubber wheel 704 can send the completed angle steel out of the working surface of the lower punching die 3.

[0052] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stamping device for processing angle steel for power transmission towers, comprising a base platform (1), a lower stamping die (3) fixedly installed at the top of the base platform (1), a hydraulic stamping assembly (2) installed at the top of the base platform (1) above the lower stamping die (3), and a plate feeding assembly (4) for feeding long metal plates between the hydraulic stamping assembly (2) and the lower stamping die (3) installed on one side of the base platform (1), characterized in that: At least two support platforms (5) are installed at the bottom of the base (1) along the length direction. Each support platform (5) is equipped with two elastic self-retracting feeding assemblies (7) with a mirror structure. The elastic self-retracting feeding assemblies (7) are located on the front and rear sides of the lower stamping die (3) in the width direction. The top of the support platform (5) is equipped with a pin-slot sliding counter-pull assembly (6) for driving the two elastic self-retracting feeding assemblies (7) in the same width direction to move towards each other. The bottom of the base (1) is equipped with a linear push drive assembly (8) for driving multiple pin-slot sliding counter-pull assemblies (6) in the length direction to work synchronously. A control panel (9) is installed on one side of the base (1). The control output end of the control panel (9) is electrically connected to the control input end of the hydraulic stamping assembly (2), the sheet feeding assembly (4), the elastic self-retracting feeding assembly (7) and the linear push drive assembly (8).

2. The processing and stamping device for angle steel of power transmission towers according to claim 1, characterized in that: The hydraulic stamping assembly (2) includes an F-shaped double-layer steel frame (201) fixed at the top left and right positions of the base (1). A shelf (202) is fixedly installed between the two F-shaped double-layer steel frames (201). A hydraulic cylinder (203) is fixedly installed at the top center of the shelf (202). A stamping seat (206) is fixed at the lower end of the piston rod of the hydraulic cylinder (203).

3. The processing and stamping device for angle steel of power transmission towers according to claim 2, characterized in that: Guide rods (204) are slidably installed along the Z-axis at the corner positions at the top of the shelf (202). The lower end of the guide rod (204) is fixed with an upper beam frame (205), and the upper beam frame (205) is fixedly connected to the stamping seat (206).

4. The processing and stamping device for angle steel of power transmission towers according to claim 1, characterized in that: The linear push drive assembly (8) includes upright plates (101) fixed at the bottom left and right positions of the base (1), long beam plates (801) are fixedly installed on the top of the two upright plates (101), and a single set of sliding tables (803) is slidably installed on the lower surface of the long beam plates (801), and a straight groove (804) is opened on one side of the surface of the single set of sliding tables (803).

5. The processing and stamping device for angle steel of power transmission towers according to claim 4, characterized in that: A servo motor (802) is installed at one end of the back of the long beam plate (801). The drive shaft of the servo motor (802) extends through to the outside of the long beam plate (801) and is equipped with a cantilever (805). A second pin (806) is rotatably installed on the other end of the cantilever (805). The second pin (806) extends through to the outside of the straight slot (804). The control input terminal of the servo motor (802) is electrically connected to the control output terminal of the control panel (9).

6. The processing and stamping device for angle steel of power transmission towers according to claim 5, characterized in that: The pin-slot sliding tie assembly (6) includes a lower slide plate (602) that is slidably installed on the top of the support platform (5) along the length of the long beam plate (801). Two double-sleeve slides (601) are symmetrically slidably installed on the top of the support platform (5) along the width of the lower stamping die (3). Inclined grooves (604) are provided at the front and rear positions of the bottom of the lower slide plate (602). A first pin (603) is rotatably installed on the bottom of the double-sleeve slide (601). The lower end of the first pin (603) extends into the interior of the corresponding inclined groove (604). The bottom of one of the lower slide plates (602) is fixedly connected to the top of the single-sleeve slide (803).

7. A processing and stamping device for angle steel of power transmission towers according to claim 6, characterized in that: A connecting beam (605) is fixedly connected between the bottom ends of two adjacent sliding plates (602). The connecting beam (605) is arranged parallel to the long beam plate (801), and the back of the connecting beam (605) and the long beam plate (801) slide together.

8. A processing and stamping device for angle steel of power transmission towers according to claim 7, characterized in that: The elastic self-retracting feeding assembly (7) includes a square hollow seat (701) fixed on the outer wall of the pin slot sliding pull assembly (6) near the lower stamping die (3). A double-layer wheel frame (702) is elastically and slidably installed inside the square hollow seat (701). A rubber wheel (704) is rotatably installed on the outer wall of the double-layer wheel frame (702) away from the square hollow seat (701). A motor (703) for driving the rubber wheel (704) to rotate is installed on the other outer wall of the double-layer wheel frame (702). The control input terminal of the motor (703) is electrically connected to the control output terminal of the control panel (9).

9. A processing and stamping device for angle steel of power transmission towers according to claim 8, characterized in that: At least one spring (705) is installed on one inner wall of the square hollow seat (701), and the other end of the spring (705) is fixedly connected to the double-layer wheel frame (702).

10. A method for processing and stamping angle steel for transmission towers, based on the processing and stamping apparatus for angle steel for transmission towers according to any one of claims 1-9, characterized in that: Includes the following steps: S101: Place the long metal sheet to be processed smoothly on the conveying position of the sheet feeding assembly (4), and ensure that the initial position of the long metal sheet is roughly aligned with the direction of the lower stamping die (3). The sheet feeding assembly (4) continuously feeds the long metal sheet to the lower stamping die (3). S102: During the feeding process, the linear push drive assembly (8) is controlled by the control panel (9). The linear push drive assembly (8) provides power to multiple pin slot sliding pull assemblies (6) synchronously. The pin slot sliding pull assembly (6) converts the linear driving force into precise lateral movement through its own designed pin and slot cooperation, thereby synchronously driving the elastic self-retracting feeding assemblies (7) located on the front and rear sides of the lower stamping die (3) to approach each other. The two elastic self-retracting feeding assemblies (7) approach the long metal plate at a uniform speed from both sides of the workpiece width direction until the roller part of the elastic self-retracting feeding assembly (7) firmly abuts against the two long edge edges of the plate with a preset contact force, thereby performing the workpiece centering operation. S103: After the centering is stable, the hydraulic stamping assembly (2) receives the control command from the control panel (9). Its punch carries huge pressure and moves down from above to press the long metal plate that has been precisely positioned into an L-shaped angle steel with a preset angle in the cavity of the lower stamping die (3). S104: After the stamping action is completed, the elastic self-retracting feeding assembly (7) is adjusted in position so that its roller part is still in contact with the long edge of the angle steel. Then, under the control of the control panel (9), the elastic self-retracting feeding assembly (7) starts to work in coordination with the ejection mechanism to push the formed angle steel smoothly out of the working surface of the hydraulic stamping assembly (2) along the length direction.

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