Multi-station continuous punch forming equipment for special-shaped copper strip

Abstract

The invention belongs to the technical field of copper bar processing, and discloses multi-station continuous punch forming equipment for special-shaped copper strips, which comprises a main frame and a workbench mounted at the bottom end of the main frame, a main cylinder is mounted at the top of the main frame, and the output end of the main cylinder is connected with a top lifting frame. According to the invention, the passive guide die holder is forcibly driven to clamp inwards through physical extrusion, the structure directly converts the power of'die descending 'into the power of'lateral clamping', and ensures that the clamping force reaches the maximum value only at the moment that a punching head is about to contact with a workpiece, so that an independent clamping power source is omitted, the equipment structure is simplified, and the production cost is reduced. And the sequential logic of first clamping and second punching is guaranteed from the mechanical principle, the problem of copper strip movement caused by desynchrony is thoroughly solved, and therefore the position precision of special-shaped copper strip punching is effectively guaranteed, and the special-shaped copper strip punching device is particularly suitable for the flexible production requirements of multiple varieties and small batches.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of copper bar processing, and particularly relates to a multi-station continuous stamping forming equipment for special-shaped copper strips. BACKGROUND

[0002] As a large-current conductive product, copper strips (copper bars) are widely used in high and low voltage electrical appliances, switch contacts, power distribution equipment, bus ducts and other electrical engineering. With the development of electrical equipment towards compactness and special shape, the application of special-shaped copper strips (such as special-shaped copper strips with non-rectangular cross-section) is increasing. In the production and processing of copper strips, stamping forming is an essential process for machining mounting holes or cutting specific shapes on the copper strips. The current stamping equipment usually uses continuous dies for automatic production, and a series of actions are completed through the cooperation of the feeding mechanism and the stamping host.

[0003] However, the existing copper strip stamping equipment has significant limitations in actual use. First, the traditional stamping guide and positioning device is usually designed for standard rectangular copper strips of a specific width, and has poor universality. When processing copper strips of different widths or special-shaped cross-sections, it is often necessary to stop and replace the entire guide die or perform tedious manual adjustment. This adjustment method not only consumes time and effort, but also seriously reduces production efficiency, and the accuracy of manual adjustment is difficult to guarantee. If the guide gap is too large, the copper strip is prone to deviation during high-speed feeding, resulting in punching position deviation; if the gap is too small, it will increase the feeding resistance and even scratch the surface of the copper strip. In addition, the clamping and fixing process before stamping of the existing equipment is usually independent of the stamping action, and a separate power source is needed to drive the clamp, which not only increases the manufacturing cost of the equipment and the complexity of the control system, but also makes it difficult to ensure the absolute synchronization of the clamping action and the stamping action, and the workpiece displacement may occur during stamping due to loose clamping, resulting in an increase in scrap rate.

[0004] Secondly, when punching the copper strip, the waste material (punching scrap) usually needs to be discharged through the scrap hole of the lower die seat. Because copper has a certain ductility and viscosity, especially when lubricating oil is used during stamping, the waste material is prone to adhere to the surface of the punch and rise with the punch (commonly known as "chip jumping"), or be stuck in the scrap hole. Once chip jumping or clogging occurs, the subsequent stamping action will press the accumulated waste material into the workpiece or damage the die edge, causing serious equipment failure and product quality accidents. Although the existing technology adds a material ejecting pin or a blowing device to assist in discharging, for irregularly shaped waste material produced by special-shaped copper strip stamping, these passive discharge methods are not ideal, and cannot fundamentally solve the problem of waste material adhesion and clogging, resulting in high equipment maintenance frequency and difficulty in achieving long-term continuous and stable operation. SUMMARY

[0005] The present application aims to provide a multi-station continuous punching forming equipment for special-shaped copper strips to solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a multi-station continuous punching forming equipment for special-shaped copper strips, comprising a main frame and a workbench installed at the bottom end of the main frame, a main cylinder is installed at the top of the main frame, a top lifting frame is connected to the output end of the main cylinder, a width adaptive adjusting assembly is connected to the bottom end of the top lifting frame, an adjustable-spacing driving guide die seat is installed at the bottom end of the width adaptive adjusting assembly, an auxiliary punching assembly is installed at the bottom end of the workbench, the auxiliary punching assembly comprises a passive guide die seat slidingly installed below the workbench, a guide slope is formed on the inner side surface of the driving guide die seat and the outer side surface of the passive guide die seat, and the driving guide die seat is driven by the main cylinder to push the passive guide die seat to slide horizontally inward to clamp the copper strip when the driving guide die seat descends, and the passive guide die seat is also synchronously connected with a cutting knife located inside the waste discharge box, and the passive guide die seat drives the cutting knife to move outward synchronously to tear the punching waste when the passive guide die seat resets horizontally outward.

[0007] As a further technical scheme of the present application, the width adaptive adjusting assembly comprises a locking frame, the top end of the locking frame is connected with the top lifting frame, limit guide rails are installed on both sides of the locking frame, a slidable limit clamping frame is clamped in the limit guide rails, the driving guide die seat is fixedly installed at the bottom end of the limit clamping frame, an activity plate is arranged above the locking frame, the activity plate and the limit clamping frame are hinged through a connecting rod, a threaded sleeve is installed on the activity plate and is connected with an adjusting screw, the activity plate is driven to ascend and descend by rotating the adjusting screw, and the driving guide die seat on both sides is adjusted in spacing through the connecting rod.

[0008] As a further technical scheme of the present application, first fixing seats are installed on both sides of the bottom end of the activity plate, second fixing seats are installed on the top end of the limit clamping frame, the connecting rod is hinged on the first fixing seat and the second fixing seat at both ends, respectively, a punching assembly is movably connected to the bottom end of the adjusting screw, and the mounting plate of the punching assembly is fixedly sleeved on the middle part of the locking frame.

[0009] As a further technical scheme of the present application, the auxiliary punching assembly comprises elongated guide rails symmetrically installed at the bottom of the workbench, a guide frame is slidingly clamped in the elongated guide rails, the passive guide die seat is fixedly installed at the top end of the guide frame, limit springs are connected between the outer side of the guide frame and the elongated guide rails, and the limit springs are used to provide the elastic force for the outward resetting of the passive guide die seat.

[0010] As a further technical scheme of the present application, the inner side of the passive guide die holder is fixed with an extension frame, the extension frame penetrates into the interior of the workbench and the terminal end is provided with a limiting wheel, the limiting wheel is used for directly contacting and clamping the side wall of the special-shaped copper strip.

[0011] As a further technical scheme of the present application, the opposite sides of the two guide frames are fixed with synchronous rods, one end of the synchronous rod extends into the interior of the waste discharge box and is connected with a pressure bearing seat, the pressure bearing seat is provided with an elastic telescopic rod, the cutting knife is installed at the top end of the elastic telescopic rod, and the cutting knife is located directly below the punching hole.

[0012] As a further technical scheme of the present application, the punching assembly comprises a mounting plate, the bottom center of the mounting plate is provided with a punching air cylinder, the output end of the punching air cylinder is connected with a punching head, and the punching head is matched with the punching hole on the workbench.

[0013] As a further technical scheme of the present application, the bottom of the mounting plate is fixed with positioning frames on both sides, the top of the punching head is fixed with positioning rods on both sides, and the positioning rods are slidingly inserted into the interior of the positioning frames to limit the punching direction of the punching head.

[0014] As a further technical scheme of the present application, the front and rear sides of the bottom end of the main frame are provided with extension ear plates, a workpiece guide wheel is rotatably installed between the extension ear plates, and a double-shaft servo motor for driving the workpiece guide wheel to rotate is further installed on the main frame.

[0015] As a further technical scheme of the present application, the output end of the main cylinder is connected with a transversely arranged linkage plate, and the two ends of the linkage plate are respectively connected with two top hoisting frames to drive two independent stations on both sides of the main frame to synchronously ascend and descend.

[0016] The present application has the following advantages: 1. The present application utilizes the geometric deflection principle of the connecting rod to convert the vertical adjustment into the horizontal opening and closing movement of the two active guide die holders by rotating the adjusting screw rod, so that the operator only needs to adjust a single point to realize the synchronous and equidistance adjustment of the two die holders, and the central reference line is always unchanged. Meanwhile, the component and the auxiliary punching assembly below form a “inclined wedge type” transmission relationship. When the inclined surface of the active guide die holder descends, the passive guide die holder is forced to clamp inward by physical extrusion, which directly converts the power of “die descending” into the power of “lateral clamping”, so that the clamping force reaches the maximum value only when the punching head is about to contact the workpiece. This design not only saves the independent clamping power source and simplifies the equipment structure, but also ensures the time sequence logic of “clamping first and then punching” from the mechanical principle, completely eliminates the copper strip movement problem caused by asynchronization, effectively guarantees the position accuracy of the special-shaped copper strip punching, and is particularly suitable for flexible production requirements of multiple varieties and small batches.

[0017] 2、The application sets a double cutting knife assembly with elastic buffering function inside the waste box, and binds its movement track with the lateral reset action of the auxiliary stamping assembly. In the stamping downward phase, the stamping head presses the waste material to the cutting knife, and uses the blanking surplus force to make the cutting knife tip pierce into the bottom of the waste material. At this time, the elastic expansion rod can provide buffering protection to prevent hard collision damage to the blade. In the mold return phase, the auxiliary stamping assembly resets to the two sides under the action of the spring, and drives the two cutting knives to synchronously separate outward. This process exerts strong tearing force on the waste material that has been pierced and hung, forcibly tears the complete waste material or destroys its integrity. The torn waste material can no longer maintain the original shape and adsorption force, and will inevitably fall off the knife tip and be smoothly discharged. This "active destruction type" waste discharge method is more reliable than the traditional blowing or gravity natural falling method, completely eliminates the possibility of upward waste carrying or downward waste blocking, effectively protects the precision stamping die, and reduces the downtime caused by cleaning waste.

[0018] 3、The main cylinder is responsible for driving the whole upper die seat, including the top lifting frame, the width adaptation assembly, etc., to perform large-range lifting movement, complete the triggering of the rapid closing and clamping action of the mold, and reset the waste material tearing action. The stamping cylinder installed inside only needs to be responsible for the punching action in the last stage of short stroke. The main cylinder provides the background force required for the main structure displacement and clamping, ensures the system rigidity, and the stamping cylinder is used for high-frequency and short-distance blanking force output. In addition, cooperating with the workpiece guide wheel driven by the double-shaft servo motor, the precise control of the feeding step distance is realized. This cooperative working mode enables the equipment to maintain the continuity of action and the high quality of forming when processing thick and high-hardness special-shaped copper strips. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the cooperation of the main rack, the linkage plate and the extension ear plate of the application; Figure 3 It is an exploded schematic diagram of the structure of the auxiliary stamping assembly and the width adaptation adjustment assembly of the application; Figure 4 It is a schematic diagram of the cooperation of the workbench and the auxiliary stamping assembly structure of the application; Figure 5 It is a partial sectional view schematic diagram of the workbench and the auxiliary stamping assembly structure of the application; Figure 6 It is an exploded schematic diagram of the width adaptation adjustment assembly and the stamping assembly structure of the application; Figure 7 It is a separate schematic diagram of the stamping assembly structure of the application; Figure 8 A separate exploded view of the width adjustment assembly structure of the present application.

[0020] In the figure: 1, main rack; 2, main cylinder; 3, linkage plate; 4, extension ear plate; 5, double-shaft servo motor; 6, workpiece guide wheel; 7, workbench; 8, waste tank; 9, punching hole; 10, auxiliary punching assembly; 101, extension guide rail; 102, guide frame; 103, passive guide die holder; 104, limit spring; 105, synchronization rod; 106, pressure bearing seat; 107, elastic telescopic rod; 108, cutting knife; 109, extension frame; 1010, limit wheel; 11, top hoisting frame; 12, width adjustment assembly; 121, locking frame; 122, limit guide rail; 123, movable plate; 124, first fixed seat; 125, second fixed seat; 126, connecting rod; 127, limit clamping frame; 128, threaded sleeve; 129, adjusting screw; 1210, active guide die holder; 13, punching assembly; 131, mounting plate; 132, positioning frame; 133, positioning rod; 134, punching cylinder; 135, punching head. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0022] As Figures 1 to 8 shown, the embodiment of the present application provides a multi-station continuous punching forming equipment for special-shaped copper strips, which comprises a main rack 1, two independent stations arranged on both sides of the main rack 1, a main cylinder 2 installed at the middle part of the inner top wall of the main rack 1, a linkage plate 3 installed at the output end of the main cylinder 2, and two independent stations connected with both sides of the linkage plate 3. The main cylinder 2 is used as the main power source for the two independent stations, and the bottom ends of both sides of the main rack 1 are also connected with the two independent stations. Double-shaft servo motors 5 are installed at the front and rear positions of the bottom end of the main rack 1, and the double-shaft servo motors 5 are connected with the main rack 1 through motor seats (not shown in the figure). Workpiece guide wheels 6 are installed at both ends of the output shaft of the double-shaft servo motor 5, and the workpiece guide wheels 6 are used for guiding the special-shaped copper strips. In order to increase the guiding stability, extension ear plates 4 are installed on both sides of the main rack 1 close to the bottom end, and the workpiece guide wheels 6 are movably sleeved between the extension ear plates 4, so as to keep the stability of the workpiece guide wheels 6 during rotation.

[0023] The independent workstation is mainly divided into an upper mold base and a lower mold base. The upper mold base is mainly composed of a top lifting frame 11, a width adaptation adjustment component 12, and a stamping component 13. The top lifting frame 11 is connected to the linkage plate 3. When the main cylinder 2 extends, it can drive the entire upper mold base to move towards the lower mold base. The lower die base mainly includes a worktable 7 and an auxiliary stamping assembly 10. The worktable 7 is connected to the main frame 1 and the worktable 7 and the main frame 1 are in a static relationship. The outer side of the workpiece guide wheel 6 is in a horizontal relationship with the inner bottom surface of the worktable 7 to ensure that the irregular copper strip can move correctly on the worktable 7. A stamping hole 9 adapted to the stamping assembly 13 is opened in the middle of the inner bottom surface of the worktable 7. At the same time, a waste discharge box 8 located on the outer side of the stamping hole 9 is installed at the bottom of the worktable 7.

[0024] Specifically, before stamping the irregular copper busbar, the free end of the irregular copper busbar needs to be placed directly above the worktable 7, and its bottom end needs to contact the outer side of the front and rear workpiece guide wheels 6. The workpiece guide wheels 6 are driven to rotate by turning on the dual-axis servo motor 5, and the irregular copper busbar is driven to move towards the rear end of the device by the friction of the workpiece guide wheels 6. The distance of each displacement is the same as the spacing of each punching.

[0025] The width adjustment assembly 12 includes a locking frame 121. Limiting guide rails 122 are installed on the left and right sides of the locking frame 121. The middle part of the locking frame 121 is fixedly sleeved with the stamping assembly 13, while the two sides of the top of the locking frame 121 are connected to the bottom of the top lifting frame 11. Limiting brackets 127 are engaged inside both the left and right limiting guide rails 122, and the limiting brackets 127 move along the direction of the limiting guide rails 122. A second fixing seat 125 is installed at the top of the limiting bracket 127. A movable plate 123 is provided above the locking frame 121, and first fixing seats 125 are symmetrically installed on both sides of the bottom of the movable plate 123. 24. A connecting rod 126 is hinged between the movable plate 123 and the second fixed seat 125. The connecting rod 126 rotates relative to the first fixed seat 124 and the second fixed seat 125. A threaded sleeve 128 is installed in the middle of the movable plate 123, and an adjusting screw 129 is threadedly connected inside the threaded sleeve 128. The bottom end of the adjusting screw 129 is movably connected to the top end of the stamping assembly 13. The adjusting screw 129 rotates relative to the stamping assembly 13. An active guide mold base 1210 is installed at the bottom end of the limiting bracket 127. The inner side of the active guide mold base 1210 is provided with a guide slope that is adapted to the stamping assembly 13.

[0026] Specifically, this device can adaptively adjust the width adaptation component 12 according to the width of the irregular copper busbar. When the width of the irregular copper busbar is wide, the movable plate 123 is moved downward by rotating the adjusting screw 129. At this time, the two connecting rods 126 deflect in a direction away from each other, thereby applying a thrust to the bottom limit bracket 127. The two limit brackets 127 move away from each other and eventually drive the bottom active guide mold base 1210 away from each other. Conversely, when the movable plate 123 moves upward, the two connecting rods 126 deflect in the direction of moving closer to each other, applying a pulling force to the bottom limit bracket 127, which in turn drives the bottom active guide mold base 1210 to move closer to each other. By changing the distance between the two active guide mold bases 1210, the contact position between them and the bottom auxiliary stamping assembly 10 is changed, thereby changing the displacement distance of the auxiliary stamping assembly 10 to adapt to the fixing requirements of copper strips of different widths.

[0027] The auxiliary stamping assembly 10 includes two extended guide rails 101, which are symmetrically installed on both sides of the bottom of the worktable 7. Inside the extended guide rails 101, a guide frame 102 is movably engaged. A passive guide mold base 103 is installed at the top of the guide frame 102. The outer side of the passive guide mold base 103 is provided with a guide slope that is compatible with the active guide mold base 1210. A limiting spring 104 located inside the extended guide rail 101 is installed on one side of the guide frame 102. The limiting spring 104 provides elastic force to the guide frame 102. In the initial state, that is, when the limiting spring 104 is not compressed, the distance between the two guide frames 102 is at its maximum value. At the same time, an extension frame 109 is installed on the inner side of the passive guide mold base 103. The extension frame 109 passes through the side of the worktable 7 and is equipped with a limiting wheel 1010 located inside the worktable 7. Meanwhile, a synchronizing rod 105 is installed on the side of the two guide frames 102 that is close to the bottom and close to each other. The side of the synchronizing rod 105 that is away from the guide frame 102 passes through the side of the waste discharge box 8 and is equipped with a pressure seat 106 located inside the waste discharge box 8. An elastic telescopic rod 107 located inside the waste discharge box 8 is installed at the top of the pressure seat 106. A cutting blade 108 located inside the waste discharge box 8 is installed at the top of the elastic telescopic rod 107. The elastic telescopic rod 107 is used to buffer the cutting blade 108, so as to prevent the cutting blade 108 from bearing excessive pressure when it is pressed, which would damage the blade surface. It also automatically resets when the cutting blade 108 is not pressed, ensuring that the cutting blade 108 is at the specified height.

[0028] Example: When the width of the irregular copper busbar is adaptively adjusted by the width adaptation adjustment component 12, and the stamping position of the irregular copper busbar is between the stamping component 13 and the stamping hole 9, the main cylinder 2 is activated to control its extension. At this time, the linkage plate 3 moves down as a whole, driving the two top lifting frames 11 on the left and right to move down as a whole. The bottom width adaptation adjustment component 12 and the stamping component 13 also move down as a whole until the inner side of the active guide mold base 1210 contacts the outer side of the passive guide mold base 103. As the active guide mold base 1210 continues to move down, and the passive guide mold base 1210 guides the outer side of the passive guide mold base 103, the width adaptation adjustment component 1210 moves down as a whole. Under the action of the inclined plane, an inward pressure can be applied to the passive guide mold base 103. At this time, the two passive guide mold bases 103 can move closer to each other under the guidance of the extension guide rail 101 and the guide frame 102. At the same time, the two extension frames 109 and the two synchronous rods 105 are driven to move closer to each other. At this time, the limit spring 104 can be compressed until the two limit wheels 1010 are driven to contact the side of the irregular copper busbar. The inner side of the copper busbar is clamped by the two limit wheels 1010 to complete the auxiliary clamping process. At this time, the stamping assembly 13 is lowered to the pre-stamping position to complete the pre-stamping positioning process.

[0029] By utilizing the cooperation between the width adaptation adjustment component 12, the auxiliary stamping component 10, and the stamping component 13, the device can first adaptively adjust to different widths of irregularly shaped copper busbars through the width adaptation adjustment component 12. During stamping positioning, the auxiliary stamping component 10 is squeezed by the downward movement of the upper die, so that it automatically completes the clamping process of the copper busbar. The entire process can be completed before stamping, and the specified height before stamping is reached at this time. After stamping is completed, that is, when the upper die moves up and resets, the limiting process of the copper busbar can be automatically released without manual limiting. This effectively improves the stamping stability of the copper busbar, simplifies the operation steps, and improves the stamping efficiency.

[0030] The stamping assembly 13 includes a mounting plate 131. The outer side of the mounting plate 131 is fixedly sleeved with the locking frame 121. The top of the mounting plate 131 is movably connected to the bottom end of the adjusting screw 129. The adjusting screw 129 rotates relative to the mounting plate 131. A stamping cylinder 134 is installed in the middle of the bottom end of the mounting plate 131. A stamping head 135 is installed at the output end of the stamping cylinder 134. The stamping head 135 is adapted to the stamping hole 9. To improve stamping stability, positioning frames 132 are installed on both sides of the bottom end of the mounting plate 131, and positioning rods 133 are installed on both sides of the top end of the stamping head 135. The positioning rods 133 pass through the positioning frames 132 and are sleeved with each other. During stamping, the positioning rods 133 and the positioning frames 132 provide linear guidance to ensure that the stamping head 135 does not deviate during stamping.

[0031] The vertical height of the bottom inclined surface of the active guide die holder 1210 is lower than the bottom surface height of the stamping head 135, ensuring that when the main cylinder 2 drives downward, the active guide die holder 1210 first contacts and drives the auxiliary stamping assembly 10 to close and clamp, and then the stamping head 135 contacts the workpiece surface.

[0032] The downward stroke of the stamping head 135 is set as follows: after the copper strip is broken, it continues to move downward for a certain distance. The bottom surface of the stamping head 135 forces the cut-off waste material to the tip of the cutting blade 108. The remaining pressure of the stamping cylinder 134 forces the cutting blade 108 to penetrate into the waste material. At this time, the elastic telescopic rod 107 is compressed and buffered.

[0033] Because the cutting blade 108 penetrates the waste to a certain depth and the waste gets stuck on the blade tip, when the two blades are forcibly separated outward, the resulting tensile force exceeds the tensile strength of the waste, causing the waste to be torn and destroyed along the piercing hole.

[0034] Example: After the shaped copper busbar is fixed in place, the stamping cylinder 134 is activated to drive the stamping head 135 to move downward. At this time, the stamping head 135 can contact the copper busbar below and stamp it. The waste generated by stamping enters the interior of the workpiece guide wheel 6 through the stamping hole 9 and is located above the cutting blade 108. As the stamping head 135 presses down, it can generate a certain pressure on the stamping waste. At this time, the bottom end of the stamping waste contacts the top of the two cutting blades 108. As the pressure increases, the tip of the cutting blade 108 pierces the two sides of the bottom end of the tip waste until the stamping is completed. Then, the stamping head 135 moves upward and the upper die seat moves upward and resets. The width adaptation adjustment component 12 no longer applies pressure to the auxiliary stamping component 10. The limit spring 104 automatically resets and drives the two passive guide die seats 103 to move away from each other, releasing the limit fixation on the copper busbar. At this time, the dual-axis servo motor 5 starts and drives the copper busbar to move towards the rear end of the device. When the two guide frames 102 are relatively far apart, they can simultaneously drive the two cutting blades 108 to move relatively far apart. Since the tip of the cutting blade 108 has already pierced the stamping waste, when the two are far apart, the stamping waste can be torn apart from both ends. At this time, the stamping waste can be broken and discharged from the bottom end of the workpiece guide wheel 6, avoiding the stamping waste being carried out by the stamping head 135 due to the stamping action, which would affect the subsequent stamping process.

[0035] By continuing to utilize the cooperation between the auxiliary stamping assembly 10, the width adaptation adjustment assembly 12, and the stamping assembly 13, that is, by utilizing the stamping process of the stamping assembly 13, the cutting blade 108 pierces the stamping waste, and at the same time, the upper die seat is used to move upward and reset to tear the stamping waste. The stamping waste in the pierced state will not be automatically carried out as the stamping head 135 rises, while the stamping waste in the broken state can be quickly discharged from the bottom end of the workpiece guide wheel 6 without causing blockage, which significantly improves the waste discharge efficiency of the device and improves the overall stamping quality.

[0036] To ensure that the waste material can be reliably torn rather than detached after elastic deformation, the stiffness coefficient and preload of the limiting spring 104 are quantitatively designed in this embodiment. The critical tearing condition after the waste material is pierced by the cutting blade 108 is set to satisfy the following mechanical model: Let the tensile strength of the irregularly shaped copper strip material (such as T2 copper) be σb, the effective cross-sectional thickness at the tear point of the scrap be t, and the tear path length from the penetration point to the edge of the scrap be L. Then, the minimum destructive force F required to tear the scrap is... tear It can be represented as: F tear = σb×t×L; Simultaneously, during the reset phase of the passive guide mold base 103, the lateral reset force F provided by the limit spring 104... spring The frictional resistance f of the sliding guide frame 102 and the destructive force of the scrap must be overcome. According to Hooke's Law, let the spring constant be k and the maximum compression be Δx. Considering simultaneous tearing on both sides, one side must satisfy: F spring = k×Δx>F tear +f; In the specific parameter settings of this embodiment, a semi-hard shaped copper strip with a thickness of t=2mm is selected, with a tensile strength σb≈250Mpa. The cutting blade tip is designed to penetrate to a depth such that the remaining tear path L≤1.5mm. The required tearing force Ftear≈750N is calculated. The limiting spring 104 selected in this device is a heavy-duty mold spring with a stiffness coefficient k set to 50N / mm. The lateral compression Δx driven by the stamping stroke is 20mm (i.e., the maximum instantaneous elastic force generated by the spring energy storage is 1000N). At this time, the condition is satisfied: 1000N>750N+f.

[0037] (Note: The guide frame uses ball bearing guides, and the frictional resistance f is extremely small and negligible.) It can be seen that the potential energy stored in the limit spring 104 is sufficient to generate an instantaneous burst force at the moment of reset to forcibly tear the waste material, thus ensuring the reliability of waste discharge from a physical principle perspective.

[0038] Working principle and usage process of this invention: Step 1: Equipment Initialization and Width Preset: The operator places the irregularly shaped copper strip to be processed on the workbench at the bottom of the main frame, and places the bottom surface of the copper strip on the front and rear sets of workpiece guide wheels. According to the actual width of the copper strip, the operator rotates the adjusting screw in the width adaptation adjustment component. When the adjusting screw rotates, it drives the threaded sleeve to move the movable plate up and down. When the movable plate moves, it drives the limit brackets on both sides to slide horizontally in the limit guide rail through the linkage mechanism. If the copper strip is wide, the operator controls the limit brackets to move the active guide mold bases below away from each other. If the copper strip is narrow, the operator controls the active guide mold bases to move closer to each other, thereby completing the initial adaptation adjustment for different width specifications. Step 2: Feeding and positioning: Start the dual-axis servo motor, which drives the workpiece guide wheel to rotate. Utilize the friction between the guide wheel and the copper strip to accurately feed the irregular copper strip along the length direction at the set step distance, so that the area to be punched is located directly below the punching assembly, that is, the punching head is aligned with the punching hole on the worktable. Step 3: Stamping cycle start and synchronous clamping: After feeding is completed, the main cylinder starts to extend, pushing the linkage plate and the top lifting frame at the top to move down as a whole. At this time, the upper die base (including the width adaptation adjustment component and the stamping component) also descends. When the active guide die base descends to contact the auxiliary stamping component below, the inclined surface on the inner side of the active guide die base and the inclined surface on the outer side of the passive guide die base are squeezed together. As the main cylinder continues to press down, the active guide die base forces the two passive guide die bases to overcome the resistance of the limit spring and move towards the center in the extension guide rail. The passive guide die base drives the extension frame and the limit wheel at the end to move inward until the limit wheel tightly abuts the side of the irregular copper strip, realizing automatic centering and clamping before stamping. Step 4: Stamping and Scrap Puncture: While the copper strip is clamped, the stamping assembly has descended to the working position. The stamping cylinder at the bottom of the mounting plate is activated, driving the stamping head to descend further, pass through the guide hole of the positioning frame, and punch the copper strip. The scrap generated by stamping is pressed into the stamping hole by the stamping head and falls into the waste discharge box. At this time, the bottom surface of the scrap contacts the tips of the two cutting blades located in the waste discharge box. Under the action of the stamping force, the elastic telescopic rod is compressed and buffered, while the tips of the cutting blades pierce and puncture the bottom sides of the scrap. Step 5: Reset and Waste Discharge: After stamping, the stamping cylinder retracts, and at the same time, the main cylinder drives the upper die seat to move upward and reset. As the active guide die seat moves upward, its lateral squeezing force on the passive guide die seat disappears. Under the restoring force of the limit spring, the two passive guide dies drive the guide frame to spring back and reset outward. The limit wheel releases the copper strip. During the process of the guide frame resetting outward, the pressure seat and cutting blade connected by the synchronous rod also separate synchronously to both sides. Since the waste has been pierced and caught by the two cutting blades, the lateral separation action of the cutting blades will directly tear or loosen the waste from the middle. The broken waste completely loses its original structural rigidity and adhesion, and falls smoothly from the waste discharge space under the workpiece guide wheel to be discharged, completing one work cycle.

Claims

1. A multi-station continuous stamping forming equipment for irregularly shaped copper strips, comprising a main frame (1) and a worktable (7) installed at the bottom end of the main frame (1), characterized in that: A main cylinder (2) is mounted on the top of the main frame (1). The output end of the main cylinder (2) is connected to a top lifting frame (11). A width adaptation adjustment component (12) is connected to the bottom end of the top lifting frame (11). An adjustable-spacing active guide mold base (1210) is mounted on the bottom end of the width adaptation adjustment component (12). An auxiliary stamping component (10) is mounted on the bottom end of the worktable (7). The auxiliary stamping component (10) includes a passive guide mold base (103) that is slidably mounted below the worktable (7). Both the inner side of the active guide mold base (1210) and the outer side of the passive guide mold base (103) are provided with mutually cooperating guide slopes. When the main cylinder (2) drives the active guide mold base (1210) to descend, it pushes the passive guide mold base (103) to slide horizontally inward through the guide slope to clamp the copper strip. The passive guide mold base (103) is also synchronously connected to a cutting blade (108) located inside the waste discharge box (8). When the passive guide mold base (103) is horizontally reset outward, it drives the cutting blade (108) to move outward synchronously to tear the stamping waste.

2. The multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 1, characterized in that: The width adaptation adjustment component (12) includes a locking frame (121), the top of which is connected to the top hoisting frame (11). Limiting guide rails (122) are installed on both sides of the locking frame (121). A slidable limiting bracket (127) is snapped into the limiting guide rail (122). The active guide mold base (1210) is fixedly installed at the bottom of the limiting bracket (127). A movable plate (123) is provided above the locking frame (121). The movable plate (123) and the limiting bracket (127) are hinged together by a connecting rod (126). A threaded sleeve (128) is installed on the movable plate (123) and an adjusting screw (129) is connected to it. By rotating the adjusting screw (129), the movable plate (123) is driven to rise and fall, and then the active guide mold bases (1210) on both sides are adjusted through the connecting rod (126).

3. The multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 2, characterized in that: The bottom of the movable plate (123) is equipped with a first fixed seat (124) on both sides, and the top of the limiting bracket (127) is equipped with a second fixed seat (125). The two ends of the connecting rod (126) are respectively hinged to the first fixed seat (124) and the second fixed seat (125). The bottom end of the adjusting screw (129) is movably connected to the stamping assembly (13), and the mounting plate (131) of the stamping assembly (13) is fixedly sleeved in the middle of the locking frame (121).

4. The multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 1, characterized in that: The auxiliary stamping assembly (10) includes an extension guide rail (101) symmetrically installed at the bottom of the worktable (7). A guide frame (102) is slidably engaged in the extension guide rail (101). The passive guide die base (103) is fixedly installed at the top of the guide frame (102). A limit spring (104) is connected between the outer side of the guide frame (102) and the extension guide rail (101). The limit spring (104) is used to provide the spring force for the passive guide die base (103) to reset outward.

5. A multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 4, characterized in that: An extension frame (109) is fixed to the inner side of the passive guide mold base (103). The extension frame (109) extends into the interior of the workbench (7) and a limit wheel (1010) is installed at its end. The limit wheel (1010) is used to directly contact and clamp the side wall of the irregular copper strip.

6. A multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 4, characterized in that: Synchronous rods (105) are fixed on opposite sides of the two guide frames (102). One end of the synchronous rod (105) extends into the interior of the waste discharge box (8) and is connected to a pressure seat (106). An elastic telescopic rod (107) is installed on the pressure seat (106). The cutting blade (108) is installed at the top of the elastic telescopic rod (107) and is located directly below the punching hole (9).

7. A multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 3, characterized in that: The stamping assembly (13) includes a mounting plate (131), on which a stamping cylinder (134) is mounted at the bottom center. The output end of the stamping cylinder (134) is connected to a stamping head (135), which is adapted to the stamping hole (9) on the worktable (7).

8. A multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 7, characterized in that: Positioning frames (132) are fixed on both sides of the bottom of the mounting plate (131), and positioning rods (133) are fixed on both sides of the top of the punch head (135). The positioning rods (133) slide inside the positioning frames (132) to limit the punching direction of the punch head (135).

9. A multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 1, characterized in that: The main frame (1) has extension ear plates (4) on the front and rear sides at the bottom. Workpiece guide wheels (6) are rotatably installed between the extension ear plates (4). A dual-axis servo motor (5) for driving the workpiece guide wheels (6) to rotate is also installed on the main frame (1).

10. A multi-station continuous stamping forming equipment for irregularly shaped copper strips according to claim 1, characterized in that: The output end of the main cylinder (2) is connected to a horizontally arranged linkage plate (3), and the two ends of the linkage plate (3) are respectively connected to two top hoisting frames (11) to drive the two independent workstations on both sides of the main frame (1) to lift synchronously.

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