A processing and stamping device and method for angle steel of power transmission towers

Abstract

This invention belongs to the field of power transmission tower component processing technology, and discloses a stamping device and method for processing angle steel for power transmission towers. The stamping device includes a base platform, a lower stamping die installed at the top of the base platform, a hydraulic stamping assembly installed at the top of the base platform above the lower stamping die, a plate feeding assembly installed on one side of the base platform, and at least two support platforms installed along the length direction at the bottom of the base platform. Each support platform has two symmetrically arranged elastic self-retracting feeding assemblies above it. The elastic self-retracting feeding assemblies are arranged on the front and rear sides of the lower stamping die. A pin-groove sliding counter-pull assembly is installed at the top of the support platform to drive the two elastic self-retracting feeding assemblies in the same width direction to move towards each other. A linear push drive assembly is installed at the bottom of the base platform to drive multiple pin-groove sliding counter-pull assemblies to work synchronously. This invention can perform feeding, centering, stamping, and ejection processes on long metal plates to produce long angle steel.

Description

Technical Field

[0001] This invention belongs to the field of power transmission tower parts processing technology, specifically, it relates to a processing and stamping device and method for angle steel of power transmission towers. Background Technology

[0002] The L-shaped angle steel stamping device for long transmission towers is a core piece of equipment in tower manufacturing. Its core function is to precisely and efficiently punch, bend, and form long L-shaped angle steel to meet the stringent requirements of the tower structure for connection holes and specific shapes. The stamping die is the core component of the stamping device, designed with precision and durability to meet complex processing needs. The control system is responsible for coordinating and automating the entire stamping process, ensuring precise control of feeding speed and stamping pressure, thereby improving production efficiency and processing accuracy. When this type of device is working, the feeding mechanism first accurately feeds the long metal plate into the processing station and positions it. Then, the control system controls the stamping head to move downwards, cooperating with the die to complete the punching or bending deformation. After the stamping head returns to its original position, the processed angle steel is removed, and a new angle steel is immediately introduced, and the cycle repeats.

[0003] Chinese invention patent application number CN202510694034.3 discloses a processing and stamping device and method for angle steel of power transmission towers. The device includes a stamping machine, a steel walking frame on one side of the stamping machine, and a vertically parallel lifting pressure roller assembly and a lower active roller assembly installed on the steel walking frame. A U-shaped frame is fixedly installed on the side of the steel walking frame away from the stamping machine. Multiple support rollers are rotatably installed on the top of the U-shaped frame. Elastic force-adding swing arm assemblies are installed at the front and rear edges of the top of the U-shaped frame. A sanding belt grinding assembly is installed on the side of the elastic force-adding swing arm assembly near the vertical center reference plane of the U-shaped frame. The U-shaped frame is used to stamp the L-shaped angle steel. The stamped L-shaped angle steel is transported to the multiple support rollers by the cooperation of the lifting pressure roller assembly and the lower active roller assembly, and the outer wall surface of the L-shaped angle steel is deburred and ground by the sanding belt grinding assembly.

[0004] The above-mentioned technical solution mainly utilizes a lifting pressure roller assembly, a lower active roller assembly, and multiple support rollers with side guards to complete the feeding and feeding of long workpieces when stamping long metal sheets into angle steel. However, for long metal sheets, their position shifts during the conveying process due to their own toughness and conveying vibrations. That is, under continuous conveying vibrations, especially the inertial impacts during start-up and stop, the sheet will produce slight lateral swaying or axial movement. Although the side guards can block large lateral movements, their restraining force is insufficient for small, cumulative shifts. This leads to inaccurate bending line positions during bending and forming, resulting in out-of-tolerance dimensions such as leg length and angle of the angle steel, affecting the final product quality. Summary of the Invention

[0005] The purpose of this invention is to provide a processing and stamping device and method for angle steel of power transmission towers. A long metal sheet to be stamped into angle steel is conveyed along its length to a lower stamping die by a sheet feeding assembly. During this process, a control panel and a linear push drive assembly drive a pin-groove sliding counter-pull assembly. The pin-groove sliding counter-pull assembly causes two elastic self-retracting feeding assemblies in the front-rear direction of the lower stamping die to approach each other until the two elastic self-retracting feeding assemblies contact the long sheet. After the long sheet is aligned, a hydraulic stamping assembly stamps the workpiece into angle steel. After the angle steel is formed, the hydraulic stamping assembly resets, and the elastic self-retracting feeding assemblies continue to contact the angle steel, feeding it out of the lower stamping die along its length. This solves the problems mentioned in the background art.

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

[0007] A stamping device for processing angle steel for power transmission towers includes a base platform, a lower stamping die fixedly installed at the top of the base platform, a hydraulic stamping assembly installed above the lower stamping die at the top of the base platform, a plate feeding assembly for feeding long metal plates between the hydraulic stamping assembly and the lower stamping die installed on one side of the base platform, at least two support platforms installed along the length direction at the bottom of the base platform, and two mirror-symmetrical elastic self-retracting feeding assemblies above each support platform, the elastic self-retracting feeding assemblies being located in the width direction below the lower stamping die. On the front and rear sides of the die, the top of the support platform is equipped with a pin-slot sliding counter-pull assembly for driving two elastic self-retracting feeding assemblies in the same width direction to move in opposite directions. The bottom of the base is equipped with a linear push drive assembly for driving multiple pin-slot sliding counter-pull assemblies in the length direction to work synchronously. A control panel is installed on one side of the base. The control output of the control panel is electrically connected to the control input of the hydraulic stamping assembly, the sheet feeding assembly, the elastic self-retracting feeding assembly, and the linear push drive assembly.

[0008] The following are further optimizations of the above technical solution by the present invention:

[0009] The hydraulic stamping assembly includes an F-shaped double-layer steel frame fixed at the top left and right positions of the base platform. A shelf is fixedly installed between the two F-shaped double-layer steel frames. A hydraulic cylinder is fixedly installed at the top center of the shelf. A stamping seat is fixed at the lower end of the piston rod of the hydraulic cylinder.

[0010] Further optimization: Guide rods are slidably installed at the corner positions at the top of the shelf along the Z-axis, and the lower end of the guide rods is fixed to the upper beam frame, which is fixedly connected to the stamping seat.

[0011] Further optimization: The linear push drive assembly includes upright plates fixed at the bottom left and right positions of the base platform, long beam plates fixedly installed at the top of the two upright plates, and a single set of sliding tables slidably installed on the lower surface of the long beam plates, with a straight groove opened on one side of the surface of the single set of sliding tables.

[0012] Further optimization: A servo motor is installed at one end of the back of the long beam plate. The drive shaft of the servo motor extends through to the outside of the long beam plate and is equipped with a cantilever. A second pin is rotatably installed on the other end of the cantilever, and the second pin extends through to the outside of the straight groove.

[0013] The control input terminal of the servo motor is electrically connected to the control output terminal of the control panel.

[0014] Further optimization: The pin-slot sliding tie assembly includes a lower slide plate that is slidably installed on the top of the support platform along the length of the long beam plate. Two double-sleeve slides are symmetrically slidably installed on the top of the support platform along the width of the lower stamping die. Inclined grooves are provided at the front and rear positions of the bottom end of the lower slide plate. A first pin is rotatably installed on the bottom end of the double-sleeve slide. The lower end of the first pin extends into the interior of the corresponding inclined groove. The bottom end of one of the lower slide plates is fixedly connected to the top end of the single-sleeve slide.

[0015] Further optimization: A connecting beam is fixedly connected between the bottom ends of two adjacent lower slide plates. The connecting beam is arranged parallel to the long beam plate, and the back of the connecting beam and the long beam plate slide together.

[0016] Further optimization: The elastic self-retracting feeding assembly includes a square hollow seat fixed on the outer wall of the pin slot sliding tie assembly near the lower stamping die. A double-layer wheel frame is elastically and slidably installed inside the square hollow seat. A rubber wheel is rotatably installed on the outer wall of the double-layer wheel frame away from the square hollow seat. A motor for driving the rubber wheel to rotate is installed on the other outer wall of the double-layer wheel frame.

[0017] The motor's control input terminal is electrically connected to the control output terminal of the control panel.

[0018] Further optimization: At least one spring is installed on one inner wall of the square hollow seat, and the other end of the spring is fixedly connected to the double-layer wheel frame.

[0019] The present invention also provides a method for processing and stamping angle steel for power transmission towers, based on the above-mentioned processing and stamping device for angle steel for power transmission towers, comprising the following steps:

[0020] S101: Place the long metal sheet to be processed smoothly on the conveying position of the sheet feeding assembly, and ensure that the initial position of the long metal sheet is roughly aligned with the direction of the lower stamping die. The sheet feeding assembly continuously feeds the long metal sheet to the lower stamping die.

[0021] S102: During the feeding process, the linear push drive assembly is controlled by the control panel. The linear push drive assembly provides power to multiple pin-slot sliding counter-pull assemblies synchronously. The pin-slot sliding counter-pull assemblies convert the linear driving force into precise lateral movement through their own designed pin and slot cooperation. This synchronously drives the elastic self-retracting feeding assemblies located on the front and rear sides of the lower stamping die to approach each other. The two elastic self-retracting feeding assemblies 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 firmly abuts against the two long edges of the plate with a preset contact force, thereby performing the workpiece centering operation.

[0022] S103: After the centering is stable, the hydraulic stamping assembly receives the control command from the control panel. Its punch carries huge pressure and moves down from above, pressing the precisely positioned long metal sheet into an L-shaped angle steel with a preset angle in the cavity of the lower stamping die.

[0023] S104: After the stamping action is completed, the elastic self-retracting feeding assembly is adjusted to keep its roller part in contact with the long edge of the angle steel. Then, under the control of the control panel, the elastic self-retracting feeding assembly starts to work in coordination with the ejection mechanism to smoothly push the formed angle steel out from the working surface of the hydraulic stamping assembly along the length direction.

[0024] The present invention, by adopting the above technical solution, has at least the following beneficial effects:

[0025] 1. This invention enables long metal sheets to be fed along their length onto a lower stamping die via a sheet feeding assembly. During this process, the control panel and linear push drive assembly drive the pin-slot sliding counter-pull assembly. The pin-slot sliding counter-pull assembly causes two elastic self-retracting feeding assemblies in the front-rear direction of the lower stamping die to move closer to each other until the two elastic self-retracting feeding assemblies contact the long sheet. After the long sheet is aligned, the hydraulic stamping assembly stamps the workpiece into an angle steel. After the angle steel is formed, the hydraulic stamping assembly resets, and the elastic self-retracting feeding assembly, after position adjustment, allows its rollers to continue contacting the angle steel, feeding the angle steel along its length from the lower stamping die. This achieves precise alignment and stable clamping of long metal sheets. Combined with the linear push drive and hydraulic stamping system, it completes high-quality stamping and continuous conveying tasks, ensuring strict control over key dimensional and positional tolerances such as bending angle and straightness of the long angle steel, significantly improving product consistency and quality.

[0026] 2. In this invention, the linear push drive assembly drives multiple pin-slot sliding counter-pull assemblies to work synchronously along the length direction. At this time, the pin-slot sliding counter-pull assemblies drive two pairs of elastic self-retracting feeding assemblies to actively approach and contact the plate from the width direction, realizing a precise "centering" operation. This ensures that the center line of the long plate can be precisely aligned with the center line of the lower stamping die before entering the final stamping position, thereby eliminating the cumulative error caused by inaccurate initial placement or serpentine offset during transportation. Compared with static guidance, it can effectively compensate for the slight bending or width tolerance of the plate itself, laying a crucial foundation for subsequent high-precision stamping and ensuring the accuracy of the angle steel forming dimensions from the source.

[0027] 3. In this invention, after the plate alignment operation is completed and the stamping action is finished, the two pairs of elastic self-retracting feeding assemblies contact the workpiece again, allowing them to continue to act as an ejection mechanism, smoothly feeding the finished angle steel out of the lower stamping die along the length direction. This eliminates the need for the previously independent pick-up or ejection device, simplifies the mechanical structure, and provides sufficient contact force to reliably clamp and transport the plates while completing the feeding task. This effectively reduces human intervention, improves production efficiency, and reduces the risk of quality fluctuations caused by improper manual operation. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention. Figure 1 ;

[0029] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention. Figure 2 ;

[0030] Figure 3 This is a three-dimensional structural diagram of an embodiment of the present invention. Figure 3 ;

[0031] Figure 4 This is a front sectional view of the overall structure in an embodiment of the present invention;

[0032] Figure 5 This is a three-dimensional sectional view of the overall structure in an embodiment of the present invention;

[0033] Figure 6 This is a perspective sectional view of the hydraulic stamping assembly in an embodiment of the present invention;

[0034] Figure 7 This is a side sectional view of the overall structure in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the linear push drive assembly in an embodiment of the present invention;

[0036] Figure 9This is a schematic diagram of the structure of the elastic self-retracting feeding assembly in an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the pin-slot sliding tie assembly in an embodiment of the present invention.

[0038] 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

[0039] 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.

[0040] 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.

[0041] 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.

[0042] A control panel 9 is installed on one side of the base platform 1. The control output terminal of the control panel 9 is electrically connected to the control input terminal of the hydraulic stamping assembly 2, the sheet metal feeding assembly 4, the flexible self-retracting feeding assembly 7, and the linear push drive assembly 8. The control panel 9 outputs control signals to independently control the corresponding hydraulic stamping assembly 2, sheet metal feeding assembly 4, flexible self-retracting feeding assembly 7, and linear push drive assembly 8 to work.

[0043] 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 platform 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 center of the top of the shelf 202. The piston rod of the hydraulic cylinder 203 is arranged vertically downward, and its lower end passes through the shelf 202 and is fixedly connected to a stamping seat 206. The piston rod of the hydraulic cylinder 203 is slidably connected to the shelf 202.

[0044] The control input terminal of the hydraulic cylinder 203 is electrically connected to the control output terminal of the control panel 9. The control panel 9 outputs control signals to control the hydraulic cylinder 203 to perform extension and retraction.

[0045] After the long metal sheet is conveyed and centered on the lower stamping die 3, the operator activates the hydraulic cylinder 203 via the control panel 9. The hydraulic cylinder 203 drives the stamping seat 206 to move down until the metal sheet undergoes sufficient plastic deformation under continuous and uniform pressure, filling the cavity of the lower stamping die 3 and forming a qualified angle steel in one go.

[0046] Guide rods 204 are slidably installed along the Z-axis at the corner of the top of the shelf 202. The lower end of the guide rods 204 is fixed with an upper beam frame 205, which is fixedly connected to the stamping seat 206.

[0047] In this embodiment, four guide rods 204 are provided at the left and right positions of the shelf 202. The multiple guide rods 204 work together to effectively ensure the stability of the upper beam frame 205 and the stamping seat 206 when they move in the Z-axis direction.

[0048] Depend on Figure 6 , Figure 7 , Figure 8 and Figure 10As shown, the linear push drive assembly 8 includes two upright plates 101 fixedly installed at the bottom left and right positions of the base platform 1. Long beam plates 801 are fixedly installed on the top of the two upright plates 101. A single set of sliding tables 803 is slidably installed on the lower surface of the long beam plates 801. A straight groove 804 is opened on one side of the surface of the single set of sliding tables 803. The straight groove 804 is arranged vertically.

[0049] In this embodiment, the single sliding table 803 is slidably connected to the long beam plate 801, which allows the single sliding table 803 to slide on the long beam plate 801, adjust its position, and facilitate use.

[0050] 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 the outside of the long beam plate 801 and is mounted on a cantilever 805. The drive shaft of the servo motor 802 is rotatably connected to the long beam plate 801. A second pin 806 is rotatably mounted on the other end of the cantilever 805. The second pin 806 extends through the outside of the straight slot 804 and slides with the straight slot 804.

[0051] The control input terminal of the servo motor 802 is electrically connected to the control output terminal of the control panel 9; the control panel 9 outputs control signals to control the servo motor 802 to work in the set direction, speed, angle, and start / stop time.

[0052] With this design, when the long metal plate is controlled by the linear push drive assembly 8, the pin slot sliding pull assembly 6, and the elastic self-retracting feeding assembly 7 to complete the centering operation, the drive shaft of the servo motor 802 drives the cantilever 805 to rotate around the axis. Since the second pin 806 is located in the straight slot 804 of the single sliding table 803, 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 of the long beam plate 801. At this time, each pin slot sliding pull assembly 6 in the length direction can obtain linear sliding force, so that the subsequent clamping action can be completed flexibly and reliably.

[0053] 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 end of the lower slide plate 602. A first pin 603 is rotatably installed at the bottom end of the double-sleeve slide 601. The lower end of the first pin 603 extends into the interior of the corresponding inclined groove 604.

[0054] In this embodiment, the bottom end of one of the sliding plates 602 is fixedly connected to the top end of the single sliding platform 803; when the single sliding platform 803 slides on the long beam plate 801, the single sliding platform 803 synchronously drives the sliding plate 602 to move.

[0055] 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 are in sliding fit.

[0056] In this embodiment, the connecting beam 605 can fix two adjacent sliding plates 602 together. When one sliding plate 602 moves, it drives the other sliding plate 602 to move synchronously, so that multiple sliding plates 602 can move synchronously, which is convenient to use. In addition, the connecting beam 605 and the long beam plate 801 are slidably connected, which can improve the stability of the connecting beam 605 when it moves.

[0057] With this design, the working principle of the pin-slot sliding tie assembly 6 is as follows: When a single sliding table 803 slides on the long beam plate 801, it will drive the lower slide plate 602 in one of the pin-slot sliding tie assemblies 6 to move along the length direction, while the lower slide plate 602 in the other pin-slot sliding tie assembly 6 will follow the movement under the drive of the connecting beam 605. That is, each lower slide plate 602 slides synchronously and in the same direction. Since the first pin 603 at the lower end of the double-set slide table 601 is located in the inclined groove 604 on the lower slide plate 602, when the lower slide plate 602 slides to the right, the lower slide plate 602 will force the two double-set slide tables 601 to move closer to each other through the inclined groove 604 and the first pin 603, so as to realize that the elastic self-retracting feeding assembly 7 approaches the long metal plate at a constant speed from both sides of the workpiece width direction, and clamps the edge of the plate with a constant and gentle force to achieve reliable positioning without hard impact, thereby ensuring the accurate positioning of the workpiece in the width direction.

[0058] Depend on Figure 9 As shown, the elastic self-retracting feeding assembly 7 includes a square hollow seat 701 fixed on a double-sleeved slide table 601 of the pin-groove sliding counter-pull assembly 6. 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 outer wall of the other side of the double-layer wheel frame 702.

[0059] In this embodiment, the power output end of the motor 703 is connected to the drive shaft of the rubber wheel 704 through a gear set. When the motor 703 starts, it drives the rubber wheel 704 to rotate through the transmission action of the gear set, which is convenient to use.

[0060] In this embodiment, the control input terminal of the motor 703 is electrically connected to the control output terminal of the control panel 9. The control panel 9 outputs control signals to control the motor 703 to work in a set direction, speed, angle, and start / stop time.

[0061] At least one spring 705 is installed on one inner wall of the square hollow seat 701. The other end of the spring 705 is fixedly connected to the double-layer wheel frame 702. The spring 705 outputs elastic force to the double-layer wheel frame 702, so that the double-layer wheel frame 702 always has elastic force, which is convenient to use.

[0062] With this design, the working principle of the elastic self-retracting feeding assembly 7 is as follows: the rubber wheel 704 in the elastic self-retracting feeding assembly 7 contacts the long edge of the long metal plate. After the long metal plate is stamped into an angle steel, the spring 705 returns to its original state from the compression state caused by centering. This causes the spring 705 to push the double-layer wheel frame 702, the rubber wheel 704, and the motor 703 close to the outer wall of the angle steel until the rubber wheel 704 contacts the angle steel. At this time, the operator can perform the feeding action, that is, turn on the motor 703 through the control panel 9. The motor 703 drives the rubber wheel 704 to rotate until the rubber wheel 704 sends the stamped angle steel out of the working surface of the lower stamping die 3, achieving the effect of one machine serving two purposes.

[0063] The present invention also provides a method for processing and stamping angle steel for power transmission towers, based on the above-mentioned processing and stamping device for angle steel for power transmission towers, comprising the following steps:

[0064] 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 onto the lower stamping die 3.

[0065] 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 tie assemblies 6 synchronously. The pin-slot sliding tie assemblies 6 convert the linear driving force into precise lateral movement through the pin and slot cooperation of their own design. This synchronously drives 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 elastic self-retracting feeding assemblies 7, in pairs, 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 edges of the plate with a preset contact force, thereby performing the workpiece centering operation.

[0066] In step S102, the working principle of the linear push drive assembly 8 is as follows: the servo motor 802 is started under the control of the control panel 9, so that its drive shaft drives the cantilever 805 to rotate around the axis. Since the second pin 806 is located in the straight slot 804 of the single sliding table 803, 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 tie assembly 6 in the length direction can obtain linear sliding force.

[0067] In step S102, the working principle of the pin-slot sliding tie assembly 6 is as follows: the connecting beam 605 is used to connect multiple sliding plates 602 into one unit. When a single sliding table 803 slides on the long beam plate 801, the connecting beam 605 drives each sliding plate 602 to slide synchronously and in the same direction. Since the first pin 603 at the lower end of the double-slot sliding table 601 is located in the inclined groove 604 on the sliding plate 602, when the sliding plate 602 slides to the right, the sliding plate 602 will force the two double-slot sliding tables 601 to move closer to each other through the inclined groove 604 and the first pin 603, so as to realize that the elastic self-retracting feeding assembly 7 approaches the long metal plate at a constant speed from both sides of the workpiece width direction, and clamps the edge of the plate with a constant and gentle force to achieve reliable positioning without hard impact, thereby ensuring the accurate positioning of the workpiece in the width direction.

[0068] S103: After the centering is stable, the hydraulic stamping assembly 2 receives the control command from the control panel 9. Its punch, carrying huge pressure, moves down from above and presses the precisely positioned long metal sheet into an L-shaped angle steel with a preset angle in the cavity of the lower stamping die 3.

[0069] S104: After the stamping action is completed, the hydraulic stamping assembly 2 automatically resets and rises. At this time, the linear push drive assembly 8 works again to drive the pin slot sliding pull assembly 6 to drive the elastic self-retracting feeding assembly 7 to continue moving. Adjust its position so that the roller part of the elastic self-retracting feeding assembly 7 is still in contact with the long edge of the angle steel. Then, the elastic self-retracting feeding assembly 7 is started under the control of the control panel 9, so that the elastic self-retracting feeding assembly 7 acts as an ejection mechanism to push the formed angle steel smoothly out from the working surface of the hydraulic stamping assembly 2 along the length direction.

[0070] In step S104, the working principle of the elastic self-retracting feeding assembly 7 is as follows: the rubber wheel 704 contacts the long edge of the angle steel, and the control panel 9 outputs a control signal to control the motor 703 to work in the set direction, speed, angle, and start / stop time; the motor 703 starts and drives the rubber wheel 704 to rotate, at which time the rubber wheel 704 can send the stamped angle steel out of the working surface of the lower stamping die 3.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which 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: The bottom of the base table (1) is provided with at least two support tables (5) in the length direction, and each support table (5) is provided with two mirror-symmetrical elastic self-retreating feeding assemblies (7) above, which are located on the front and back sides of the lower stamping die (3) in the width direction, and the top end of the support table (5) is provided with a pin slot sliding type pulling assembly (6) for driving the two elastic self-retreating feeding assemblies (7) in the same width direction to move towards each other, the bottom of the base table (1) is provided with a linear pushing driving assembly (8) for driving the multiple pin slot sliding type pulling assemblies (6) in the length direction to work synchronously, one side of the base table (1) is provided with a control panel (9), 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 linear pushing driving assembly (8) comprises vertical plates (101) fixed at the left and right positions of the bottom of the base table (1), and long beam plates (801) are fixedly installed at the top ends of the two vertical plates (101), and single sliding tables (803) are slidably installed on the lower surfaces of the long beam plates (801), and straight slots (804) are formed in one side of the surface of the single sliding table (803). The pin slot sliding type pulling assembly (6) comprises lower sliding plates (602) slidably installed at the lower top of the support table (5) in the length direction of the long beam plate (801), and two double sliding tables (601) are symmetrically slidably installed at the top end of the support table (5) in the width direction of the lower stamping die (3), and inclined slots (604) are formed at the front and back positions of the bottom end of the lower sliding plate (602), and a first pin rod (603) is rotatably installed at the bottom end of the double sliding table (601), and the lower end of the first pin rod (603) extends into the corresponding inclined slot (604), and the bottom end of one of the lower sliding plates (602) is fixedly connected with the top end of the single sliding table (803).

2. The processing and punching device for the power transmission tower angle steel according to claim 1, characterized in that: The hydraulic stamping assembly (2) comprises F-shaped double-layer steel frames (201) fixed at the left and right positions of 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), and a hydraulic cylinder (203) is fixedly installed at the top end center position of the layer plate (202), and a stamping seat (206) is fixedly installed at the lower end of the piston rod of the hydraulic cylinder (203).

3. The processing and punching device for the power transmission tower angle steel according to claim 2, characterized in that: A guide rod (204) is slidably installed at the corner position of the top end of the layer plate (202) in the Z-axis direction, and an upper beam frame (205) is fixedly installed at the lower end of the guide rod (204), and the upper beam frame (205) is fixedly connected with the stamping seat (206).

4. The processing and punching device for the power transmission tower angle steel according to claim 3, characterized in that: A servo motor (802) is installed at one end of the back surface of the long beam plate (801), the driving shaft end of the servo motor (802) penetrates through the outside of the long beam plate (801) and is provided with a cantilever (805), the other end of the cantilever (805) is rotatably installed with a second pin rod (806), and the second pin rod (806) penetrates through the outside of the straight slot (804). The control input end of the servo motor (802) is electrically connected with the control output end of the control panel (9).

5. The processing and punching device for the power transmission tower angle steel according to claim 4, characterized in that: The bottom ends of two adjacent lower sliding plates (602) are fixedly connected with a connecting beam (605), the connecting beam (605) is arranged in parallel with the long beam plate (801), and the back surfaces of the connecting beam (605) and the long beam plate (801) are slidingly matched.

6. The processing and punching device for the power transmission tower angle steel according to claim 5, characterized in that: The elastic self-retreating feeding assembly (7) comprises a square hollow seat (701) fixed on the outer wall of the pin slot sliding type pull assembly (6) close to the lower stamping die (3), a double-layer wheel frame (702) is elastically and slidingly arranged in the square hollow seat (701), a rubber wheel (704) is rotatably arranged on the outer wall of the double-layer wheel frame (702) away from the square hollow seat (701), and a motor (703) for driving the rubber wheel (704) to rotate is arranged on the other outer wall of the double-layer wheel frame (702). The control input end of the motor (703) is electrically connected with the control output end of the control panel (9).

7. The processing and punching device for the power transmission tower angle steel according to claim 6, characterized in that: At least one spring (705) is arranged on one inner wall of the square hollow seat (701), and the other end of the spring (705) is fixedly connected with the double-layer wheel frame (702).

8. A method for processing and stamping a power transmission tower angle steel based on the processing and stamping device for the power transmission tower angle steel according to any one of claims 1-7, characterized in that: The method comprises the following steps: S101: The long-gauge metal sheet to be processed is placed stably on the conveying position of the sheet feeding assembly (4), and the initial position of the long-gauge metal sheet is ensured to be approximately aligned with the direction of the lower stamping die (3), so that the long-gauge metal sheet is continuously fed to the lower stamping die (3) by the sheet feeding assembly (4); S102: During the feeding process, the linear movement driving assembly (8) is controlled to work by the control panel (9), the linear movement driving assembly (8) synchronously provides power for a plurality of pin slot sliding type pull assemblies (6), the pin slot sliding type pull assembly (6) converts the linear driving force into accurate transverse movement through the cooperation of the pin and the slot, thereby synchronously driving the elastic self-retreating feeding assemblies (7) located on the front and rear two side edges of the lower stamping die (3) to move close to each other, the two elastic self-retreating feeding assemblies (7) in each group uniformly approach the long-gauge metal sheet from the two sides in the width direction of the workpiece, and the roller part of the elastic self-retreating feeding assembly (7) stably abuts against the two long edge edges of the sheet with a preset contact force, so that the workpiece centering operation is performed; S103: After the centering is stable, the hydraulic stamping assembly (2) receives the control instruction of the control panel (9), the punch carrying a large pressure moves downward from above, and the long-gauge metal sheet that has been accurately positioned is pressed into the mold cavity of the lower stamping die (3) to form an L-shaped angle steel with a preset angle; S104: After the stamping action is completed, the roller part of the elastic self-retreating feeding assembly (7) still contacts the long edge edge of the angle steel after position adjustment, and then the elastic self-retreating feeding assembly (7) starts to act as a pushing mechanism under the control of the control panel (9) to stably push the formed angle steel along the length direction out of the working surface of the hydraulic stamping assembly (2).

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