A segmented punch press and a method of punching

Abstract

The application relates to the technical field of mechanical manufacturing, in particular to a sectional type punching machine and a punching method. The punching machine comprises a base assembly, a sliding assembly, a driving assembly, a manual operation assembly and a safety control assembly. A handle rod in the manual operation assembly is linked with a sliding plate in the sliding assembly. A punch is installed on the sliding plate. During punching, the handle rod is first manually pulled to drive the punch to accurately align with a riveting position, and then a button switch is started to output pressure of a cylinder to complete riveting. The punching stroke is divided into two stages of manual alignment and pneumatic pressure application. In the safety control assembly, a step is arranged on the upper part of a switch frame. After the handle rod is lifted to a preset height, the handle rod is automatically dropped into the step under the action of a tension spring and is limited, and a micro switch is triggered to be turned off at the same time. The power supply circuit of an electromagnetic valve is cut off, so that the cylinder cannot be actuated. After the handle rod leaves the step, the micro switch is restored to be closed, and the electromagnetic valve circuit is on standby.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing technology, and more specifically, to a segmented stamping press and a stamping method. Background Technology

[0002] In the machinery manufacturing industry, stamping machines are widely used for riveting, punching, bending and other processes of parts. Traditional stamping machines usually complete one process in one stamping stroke, that is, the power mechanism drives the punch to complete the downward and return stroke in one go. This one-stroke stamping method can meet the requirements when processing parts of conventional size. However, when riveting parts with very small dimensions or parts with small gaps, due to the manufacturing error of the parts themselves and the existence of installation and positioning errors, the punch often has difficulty in accurately aligning with the riveting part of the parts, resulting in unqualified riveting results.

[0003] To address these issues, some existing technologies attempt to improve alignment accuracy using vision guidance or precision positioning fixtures. However, vision guidance systems are costly and complex to maintain, while precision positioning fixtures have poor versatility across different parts. Other solutions employ manual stamping machines, where operators apply pressure entirely manually. While this facilitates alignment, the manual pressure is low and unstable, making it difficult to ensure consistent riveting deformation. Furthermore, in equipment combining manual operation and power drive, there is a safety risk of accidental activation of the power mechanism when the operator's hand is positioned below the punch.

[0004] Therefore, there is an urgent need for a stamping equipment that can achieve flexible and precise alignment of the punch, provide sufficient and stable riveting force, and have reliable safety protection. Summary of the Invention

[0005] In view of this, in order to solve the above-mentioned problems in the prior art, this application provides a segmented stamping press and a stamping method.

[0006] The embodiments of this application are implemented as follows: In a first aspect, this application provides a segmented stamping press, including a base assembly, a sliding assembly, a drive assembly, a manual operation assembly, and a safety control assembly: The base assembly includes a base plate and two columns fixed to the base plate; The sliding assembly includes linear sliding bearings respectively sleeved on the two columns, a sliding plate fixedly connected to the two linear sliding bearings, a punch seat fixed on the sliding plate, and a punch installed on the punch seat. The sliding plate can move up and down along the columns. The drive assembly includes a top plate fixed to the top of the column and a cylinder mounted on the top plate. The manual operation component includes a pivot seat mounted on the base plate, a pivot mounted on the pivot seat that can rotate left and right, a handle rod mounted on the pivot, a spring pull plate fixed on the pivot, and a tension spring connected to the spring pull plate at one end and to the base plate at the other end. The handle rod is linked to the sliding plate, and the handle rod can swing up and down relative to the pivot. The safety control component includes a switch frame mounted on a base plate, a micro switch mounted on the switch frame, a push-button switch mounted on the base plate, and a solenoid valve. The upper part of the switch frame is provided with a step. The air passage interface of the solenoid valve is connected to the cylinder. The control end of the solenoid valve is connected in series with the micro switch, the push-button switch, and an external power supply. The handle has a safety locking position. When the handle is in the safety locking position, it engages with the step of the switch frame and is limited. The handle triggers the micro switch to be in the open state, cutting off the power supply circuit of the solenoid valve. When the handle leaves the safety locking position, the micro switch returns to the closed state, and the power supply circuit of the solenoid valve is in the ready-to-connect state. Furthermore, when the handle moves out of the safety locking position and swings downward, it drives the sliding plate and the punch to move downward.

[0007] In one possible implementation, the handle rod has a strip-shaped hole, a connecting seat is fixed on the sliding plate, a second pin is mounted on the connecting seat, and the strip-shaped hole is fitted onto the second pin.

[0008] In one possible implementation, the steps of the switchgear are inclined step surfaces.

[0009] In one possible implementation, a pressure head is fixed to the end of the telescopic rod of the cylinder. When the cylinder is working, the telescopic rod extends and the pressure head presses against the upper surface of the punch seat.

[0010] In one possible implementation, there are two linear sliding bearings, and the sliding plate is fixedly connected to the two linear sliding bearings by screws.

[0011] In one possible implementation, the push-button switch is mounted on the front left side of the base plate, the switch holder is mounted on the front right side of the base plate, and the pivot seat is mounted on the rear side of the base plate.

[0012] In one possible implementation, the solenoid valve is a two-position five-way solenoid valve, which is provided with a compressed gas input port and two output ports, respectively connected to the upper chamber and lower chamber of the cylinder.

[0013] In one possible implementation, four foot pads are installed on the bottom of the base plate.

[0014] In one possible implementation, the handle lever is hinged to the top of the pivot via a first pin.

[0015] Secondly, this application provides a stamping method for a segmented stamping press, comprising: Safety Lock: When the handle is placed in the safety lock position, the handle engages with the step of the switch frame, the micro switch is in the off state, the solenoid valve is de-energized, and the cylinder is locked and cannot operate. Assembly: Install the part to be riveted below the punch; Unlocking and manual alignment: Move the handle rod out of the safety lock position, the micro switch returns to the closed state, and the power supply circuit of the solenoid valve is ready; then push the handle rod downward, so that the handle rod drives the sliding plate and the punch to move downward until the punch aligns with and presses against the riveting part of the part to be riveted; Pneumatic pressure application: Keep the handle rod in position, press the button switch, the solenoid valve is energized, the telescopic rod of the cylinder extends, driving the pressure head to move downward and press against the punch seat, the pressure generated by the cylinder is transmitted to the punch through the punch seat, and the punch completes the riveting deformation of the part to be riveted, and the riveted part is obtained; Reset: Release the button switch, the cylinder extension rod retracts, lift the handle rod upwards to return the handle rod to the safety lock position, and remove the riveted part.

[0016] The technical solution provided in this application can achieve at least the following beneficial effects: This application provides a segmented stamping press and stamping method, which divides the stamping stroke into a manual alignment stage and a pneumatic pressure application stage, and integrates mechanical... The electrical composite safety interlock mechanism effectively solves the problem of punch alignment difficulties caused by manufacturing and positioning errors when riveting small parts and narrow gaps. It also significantly improves operational safety. Specifically, the base assembly provides stable support, and the sliding assembly achieves low-friction vertical guidance of the punch through a precise fit between the linear sliding bearing and the column. The handle in the manual operation assembly is linked to the sliding plate, allowing the operator to flexibly and precisely control the punch's downward distance and position during manual alignment until the punch is precisely aligned with the riveting part, overcoming the limitation of fully automatic stamping machines that cannot adjust for minor errors in real time. The cylinder in the drive assembly is triggered by a button switch after manual alignment, outputting stable and sufficiently high pressure. This pressure is transmitted to the punch through the pressure head and punch seat, causing a preset plastic deformation at the riveting part. This ensures consistent riveting quality and avoids the inconsistencies in manual pressure. To address any issues of instability or shortness of foot, the safety control components, through the coordinated action of the steps on the switch frame, microswitches, tension springs, and handle rods, ensure that the handle rod automatically falls into the steps after being raised to a preset height, triggering the microswitch to disconnect the solenoid valve circuit. This ensures that the cylinder cannot move during loading and unloading, forming a dual safety protection of mechanical limit and electrical cut-off. When the handle rod leaves the steps, the microswitch returns to its closed position, and the solenoid valve circuit is ready. Further, a push-button switch enables dual activation, effectively preventing personal injury caused by misoperation. In addition, the slotted hole on the handle rod and the second pin on the connecting seat ensure that the up-and-down swing and left-and-right rotation of the handle rod do not interfere with each other, ensuring reliable transmission. The inclined step surface design facilitates the automatic sliding and stable limiting of the handle rod. The solenoid valve adopts a two-position five-way or two-position three-way valve, combined with the upper and lower chamber control of the cylinder, to achieve rapid response and precise reset of the telescopic rod.

[0017] The segmented stamping method described in this application is executed sequentially in five steps: safety locking, part loading, unlocking and manual alignment, pneumatic pressure application, and reset. The logic is clear, and the correspondence between the preceding and following states is well-defined, which further standardizes the operation process and reduces the difficulty of operation and the probability of errors.

[0018] This application improves production efficiency and product quality while ensuring the riveting alignment accuracy of small-sized parts. It also provides effective protection for operators through a low-cost, high-reliability safety interlocking mechanism, demonstrating significant practical value and promising prospects for widespread application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a segmented stamping press according to an exemplary embodiment of this application; Figure 2 This is a schematic front view of a segmented stamping press according to an exemplary embodiment of this application; Figure 3 This is a schematic diagram of the left side of a segmented stamping press according to an exemplary embodiment of this application; Figure 4 This is a top view schematic diagram of a segmented stamping press shown in an exemplary embodiment of this application; Figure 5 This is a schematic diagram of the switch frame structure shown in an exemplary embodiment of this application; Figure 6 This is a schematic diagram of the handle lever structure shown in an exemplary embodiment of this application; Figure 7 This is a schematic diagram of the structure of the connector shown in an exemplary embodiment of this application; Figure 8 This is a schematic flowchart illustrating a stamping method of a segmented stamping press according to an exemplary embodiment of this application.

[0021] Figure label: 1. Cylinder; 2. Top plate; 3. Telescopic rod; 4. Pressure head; 5. Sliding plate; 6. Punch seat; 7. Punch; 8. Column; 9. Push button switch; 10. Foot pad; 11. Base plate; 12. Micro switch; 13. Solenoid valve; 14. Tension spring; 15. Linear sliding bearing; 16. Switch frame; 17. Spring fixing plate; 18. Rotary shaft seat; 19. Spring pull plate; 20. Rotary shaft; 21. First pin; 22. Handle rod; 23. Connecting seat; 24. Second pin. Detailed Implementation

[0022] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0023] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0024] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0025] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0026] Next, the technical solutions of this application and how they solve the aforementioned technical problems will be described in detail through embodiments and in conjunction with the accompanying drawings. The embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application.

[0027] In one exemplary embodiment, such as Figure 1 As shown, a segmented stamping press is provided. In this embodiment, the segmented stamping press may include a base assembly, a sliding assembly, a drive assembly, a manual operation assembly, and a safety control assembly. The base assembly includes a base plate 11 and two columns 8 fixed on the base plate 11; The sliding assembly includes linear sliding bearings 15 respectively sleeved on the two columns 8, a sliding plate 5 fixedly connected to the two linear sliding bearings 15, a punch seat 6 fixed on the sliding plate 5, and a punch 7 installed on the punch seat 6. The sliding plate 5 can move up and down along the column 8. The drive assembly includes a top plate 2 fixed to the top of the column 8 and a cylinder 1 mounted on the top plate 2; The manual operation component includes a pivot 20 seat 18 mounted on the base plate 11, a pivot 20 mounted on the pivot 20 seat 18 that can rotate left and right, a handle 22 mounted on the pivot 20, a spring pull plate 19 fixed on the pivot 20, and a tension spring 14 connected at one end to the spring pull plate 19 and at the other end to the base plate 11. The handle 22 is linked to the sliding plate 5, and the handle 22 can swing up and down relative to the pivot 20. The safety control component includes a switch frame 16 mounted on a base plate 11, a micro switch 12 mounted on the switch frame 16, a push-button switch 9 mounted on the base plate 11, and a solenoid valve 13. The upper part of the switch frame 16 is provided with a step. The air passage interface of the solenoid valve 13 is connected to the cylinder 1. The control end of the solenoid valve 13 is connected in series with the micro switch 12, the push-button switch 9, and an external power supply. The handle 22 has a safety locking position. When the handle 22 is in the safety locking position, it engages with the step of the switch frame 16 and is limited. The handle 22 triggers the micro switch 12 to be in the open state, cutting off the power supply circuit of the solenoid valve 13. When the handle 22 leaves the safety locking position, the micro switch 12 returns to the closed state, and the power supply circuit of the solenoid valve 13 is in the ready-to-connect state. Furthermore, when the handle 22 moves downward after being removed from the safety locking position, it drives the sliding plate 5 and the punch 7 to move downward.

[0028] In one embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, the specific implementation of this segmented stamping press includes a base assembly, a sliding assembly, a drive assembly, a manual operation assembly, and a safety control assembly.

[0029] The base assembly includes a base plate 11 and two columns 8 fixedly installed on the base plate 11. The base plate 11 is made of cast iron or steel plate and has sufficient rigidity and stability. The two columns 8 are vertically fixed to the upper surface of the base plate 11 by screws and are arranged symmetrically from left to right. Foot pads 10 are installed at the four corners of the bottom of the base plate 11 for cushioning and leveling.

[0030] The sliding assembly includes linear sliding bearings 15 respectively sleeved on two columns 8, a sliding plate 5 fixedly connected to the two linear sliding bearings 15, a punch seat 6 fixed on the sliding plate 5, and a punch 7 mounted on the punch seat 6. The linear sliding bearings 15 are oil-free lubricated bearings or ball linear bearings, and their inner holes are precisely fitted with the outer circles of the columns 8 to achieve low-friction up-and-down movement. The sliding plate 5 is a flat plate structure and is fixedly connected to the end faces or flanges of the two linear sliding bearings 15 by screws. Therefore, the sliding plate 5 can move up and down along the columns 8 together with the linear sliding bearings 15. The punch seat 6 is fixed to the center of the lower surface of the sliding plate 5 by screws. The punch 7 is installed on the punch seat 6 in a replaceable manner, for example, by locking with a lateral set screw or by fixing with a quick-change chuck, to adapt to the size of different riveting parts.

[0031] The drive assembly includes a top plate 2 fixed to the top of the column 8 and a cylinder 1 mounted on the top plate 2. The top plate 2 is fixed to the top of the two columns 8 by screws to form a gantry structure. The cylinder 1 is a single-rod double-acting cylinder 1, and its cylinder body is vertically mounted in the center of the top plate 2 by screws. The piston rod, i.e. the telescopic rod 3, extends downward.

[0032] The manual operation components include a pivot 20 seat 18 mounted on the rear of the base plate 11, a pivot 20 mounted on the pivot 20 seat 18 and rotatable left and right, a handle 22 mounted on the pivot 20, a spring pull plate 19 fixed on the pivot 20, and a tension spring 14 connected at one end to the spring pull plate 19 and at the other end to the base plate 11. The pivot 20 seat 18 is a pair of supports with shaft holes, which are fixed to the rear edge of the base plate 11 by screws. The two ends of the rotating shaft 20 are mounted in the rotating shaft 20 seat 18 via rolling bearings or sliding bearings, allowing it to rotate left and right around its own axis. The lower end of the handle 22 is fixedly connected to the rotating shaft 20 or hinged via the first pin 21. The upper end of the handle 22 is the operating end for the operator to hold. The spring pull plate 19 is a metal plate, fastened to the shaft body of the rotating shaft 20 by screws. One end of the tension spring 14 is hooked in the hole of the spring pull plate 19, and the other end is hooked in the hole of the spring fixing plate 17 fixed on the base plate 11. The preload of the tension spring 14 ensures that the rotating shaft 20 is always subjected to a rightward rotational torque. The handle 22 is connected to the sliding plate 5 via a linkage mechanism. Through this linkage, the up-and-down swing of the handle 22 can drive the sliding plate 5 and the punch 7 to move up and down.

[0033] The safety control components include a switch frame 16 mounted on the base plate 11, a micro switch 12 mounted on the switch frame 16, a push-button switch 9 mounted on the base plate 11, and a solenoid valve 13. The switch frame 16 is fixed to the front right part of the base plate 11 by screws, and a step is provided on its upper part. The micro switch 12 is a micro switch 12 with normally closed contacts. Its body is fixed on the switch frame 16, and its pressure rod faces the inside of the switch frame 16. When the handle rod 22 falls into the step, the rod body of the handle rod 22 just presses down the pressure rod. The push-button switch 9 is a normally open self-resetting button, installed on the front left side of the base plate 11 for easy pressing with the operator's left hand. The solenoid valve 13 is installed at the rear of the base plate 11 and is either a two-position five-way solenoid valve 13 or a two-position three-way solenoid valve 13. Its air inlet P is connected to an external compressed air source, and its two working ports A and B are connected to the upper and lower chambers of cylinder 1, respectively. The two exhaust ports are equipped with mufflers. One end of the solenoid coil of the solenoid valve 13 is connected to the positive terminal of an external power supply, and the other end is connected in series with the push-button switch 9 and the micro switch 12 and then connected to the negative terminal of the power supply to form a series control circuit. That is, the solenoid valve 13 is energized only when the micro switch 12 is closed and the push-button switch 9 is pressed; otherwise, the solenoid valve 13 is de-energized.

[0034] Safety Locking and Interlocking Relationship: The handle lever 22 has a safety locking position. In this position, after the handle lever 22 is raised to a certain height, it automatically rotates to the right under the action of the tension spring 14, causing the handle lever 22 to fall into the step of the switch frame 16. At this time, the handle lever 22 cooperates with the step, and the step supports the handle lever 22 from below, preventing it from moving downwards, thus achieving mechanical limiting. At the same time, the handle lever 22 presses down the lever of the micro switch 12, causing the normally closed contact of the micro switch 12 to open, thereby cutting off the power supply circuit of the solenoid valve 13, preventing the cylinder 1 from operating, and achieving electrical safety interlocking. When the operator pulls the handle lever 22 to the left, causing it to leave the step, the lever of the micro switch 12 is released, and its normally closed contact returns to the closed state. The power supply circuit of the solenoid valve 13 is in a ready-to-connect state. In addition, when the handle lever 22 moves downwards after moving out of the safety locking position, it drives the sliding plate 5 and the punch 7 to move downwards through the linkage mechanism, achieving manual alignment.

[0035] In one embodiment, such as Figure 7 As shown, the linkage between the handle rod 22 and the sliding plate 5 adopts the following structure: A strip-shaped hole is provided in the middle of the handle rod 22. The strip-shaped hole is an oblong through groove, and its length direction is consistent with the direction of the handle rod 22. A connecting seat 23 is fixed in the center of the upper surface of the sliding plate 5. The connecting seat 23 is in the shape of an inverted U or a plate. A second pin 24 in the horizontal direction is installed at its upper end. The strip-shaped hole in the middle of the handle rod 22 is fitted onto the second pin 24. The second pin 24 can slide in the strip-shaped hole. When the handle rod 22 swings up and down, the upper or lower edge of the strip-shaped hole pushes the second pin 24, thereby driving the connecting seat 23 and the sliding plate 5 to move up and down. When the handle rod 22 rotates left and right, due to the length margin of the strip-shaped hole, the second pin 24 can slide horizontally relative to the strip-shaped hole without interference. This structure is simple and reliable, realizing the two-degree-of-freedom motion transmission between the handle rod 22 and the sliding plate 5.

[0036] In one embodiment, such as Figure 5 As shown, the switch frame 16 is an L-shaped or trapezoidal support with a step on top. This step has an inclined surface, meaning the supporting surface of the step is tilted at a certain angle relative to the horizontal plane, and the entrance side of the step has a chamfer or rounded corner. When the handle 22 rotates to the right under the action of the tension spring 14, its body can automatically slide into the bottom of the step along the inclined surface and be reliably limited. The design of the inclined surface facilitates the smooth entry of the handle 22 and prevents it from coming out on its own due to vibration or accident.

[0037] In one embodiment, the lower end of the telescopic rod 3 of the cylinder 1 is fixed with a pressure head 4 by a threaded connection or flange connection. The pressure head 4 is made of wear-resistant steel, and its lower end face is a flat surface or a slightly convex spherical surface. When the cylinder 1 works, the telescopic rod 3 extends downward, and the pressure head 4 moves downward and presses against the upper surface of the punch seat 6. The upper surface of the punch seat 6 can be provided with a recess or a gasket to ensure good contact with the end face of the pressure head 4. The pressure generated by the cylinder 1 is transmitted to the punch 7 through the pressure head 4 and the punch seat 6, and finally acts on the part to be riveted to complete the riveting deformation. It should be noted that during the manual alignment stage, the punch 7 may have already made slight contact with the part, but at this time the pressure head 4 has not yet contacted the punch seat 6. Only after the button switch 9 is pressed will the telescopic rod 3 extend, and the pressure head 4 will hit or press against the punch seat 6, thereby achieving segmented pressure application and avoiding damage to the part by applying excessive pressure during manual alignment.

[0038] In one embodiment, there are two linear sliding bearings 15, which respectively cooperate with two columns 8. Each linear sliding bearing 15 has a threaded hole or flange on its outer sleeve. The sliding plate 5 is fixedly connected to the two linear sliding bearings 15 by screws. Specifically, the sliding plate 5 has countersunk screw holes on both sides. Hex socket screws are screwed through the sliding plate 5 into the flange threaded holes of the linear sliding bearing 15 to fasten the two together. This connection method ensures the synchronous movement of the sliding plate 5 and the two linear sliding bearings 15 and facilitates disassembly and maintenance.

[0039] In one embodiment, to achieve ergonomic operation, the installation positions of each component are optimized. The push-button switch 9 is installed on the front left side of the base plate 11, making it easy for the operator's left thumb to press. The switch bracket 16 is installed on the front right side of the base plate 11, symmetrically distributed with the push-button switch 9. The pivot 20 seat 18 is installed in the center or slightly to the right of the rear of the base plate 11. This layout allows the operator to hold and operate the handle lever 22 with their right hand and press the push-button switch 9 with their left hand when facing the equipment. The division of labor between the two hands is clear, which conforms to general operating habits and avoids cross-interference between the left and right hands.

[0040] In one embodiment, the solenoid valve 13 is preferably a two-position five-way solenoid valve 13. The solenoid valve 13 has an air inlet P, two working ports A and B, and two exhaust ports EA and EB. The air inlet P is connected to the filtered and depressurized compressed air. The working port A is connected to the upper chamber of the cylinder 1, and the working port B is connected to the lower chamber of the cylinder 1. When the coil of the solenoid valve 13 is energized, P and A are connected, and B and EB are connected. Compressed air enters the upper chamber of the cylinder 1, and exhaust is discharged from the lower chamber, and the telescopic rod 3 extends. When the coil is de-energized, under the action of the return spring, P and B are connected, and A and EA are connected. Compressed air enters the lower chamber, and exhaust is discharged from the upper chamber, and the telescopic rod 3 retracts. If a two-position three-way solenoid valve 13 is used, it needs to be used in conjunction with a single-acting cylinder 1. In this embodiment, a two-position five-way valve is selected in conjunction with a double-acting cylinder 1 to obtain a faster response speed and control flexibility.

[0041] In one embodiment, a foot pad 10 is installed at each of the four corners of the bottom of the base plate 11. The foot pad 10 is made of rubber or polyurethane material and has anti-slip, shock absorption and leveling functions. The height of each foot pad 10 can be adjusted by threads to keep the equipment level on uneven work surfaces.

[0042] In one embodiment, such as Figure 6 As shown, the lower end of the handle 22 is hinged to the top end of the rotating shaft 20 via the first pin 21. Specifically, the top end of the rotating shaft 20 is provided with a U-shaped fork or flat groove, into which the lower end of the handle 22 is inserted. The first pin 21 passes through the holes on the rotating shaft 20 and the handle 22 and is axially fixed with a cotter pin or snap ring. This hinge structure allows the handle 22 to swing up and down in the vertical plane around the first pin 21. At the same time, the handle 22 can also rotate left and right around the axis of the rotating shaft 20 together with the rotating shaft 20. The two degrees of freedom of movement are converted into the up and down movement of the sliding plate 5 and the left and right swing of the handle 22 itself through the cooperation of the strip hole and the first pin 21, without interfering with each other.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] Corresponding to the aforementioned embodiment of a segmented stamping press, and employing the same technical concept, this application also provides an embodiment of a stamping method for a segmented stamping press.

[0045] In one exemplary embodiment, such as Figure 8 As shown, the stamping method of this segmented stamping press may include the following steps: Step 100: Safety Lock. Place the handle rod in the safety lock position. At this time, the handle rod engages with the step of the switch frame, the micro switch is in the off state, the solenoid valve is de-energized, and the cylinder is locked and cannot operate. Step 200: Assembly, installing the part to be riveted below the punch; Step 300: Unlock and manually align. Move the handle rod out of the safety lock position, the micro switch returns to the closed state, and the power supply circuit of the solenoid valve is ready. Then push the handle rod downward, so that the handle rod drives the sliding plate and the punch to move downward until the punch aligns with and presses against the riveting part of the part to be riveted. Step 400: Apply pneumatic pressure, keep the handle rod in position, press the button switch, the solenoid valve is energized, the telescopic rod of the cylinder extends, driving the pressure head to move downward and press against the punch seat, the pressure generated by the cylinder is transmitted to the punch through the punch seat, and the punch completes the riveting deformation of the part to be riveted, and the riveted part is obtained; Step 500: Reset, release the button switch, the cylinder extension rod retracts, lift the handle rod upwards to return the handle rod to the safety locking position, and remove the riveted part.

[0046] In one embodiment, the specific implementation process of the stamping method of the segmented stamping press is as follows: Safety locking procedure: The operator lifts the handle upwards until it reaches the preset height. At this point, under the tension of the spring, the handle automatically rotates to the right, and its body slides along the inclined step surface of the switch frame into the bottom of the step. The handle is supported from below by the step and cannot fall, thus placing the handle in the safety locked position. Simultaneously, the handle presses down the lever of the microswitch, causing the normally closed contact of the microswitch to open, de-energizing the solenoid coil of the solenoid valve, and preventing the cylinder from operating. At this point, even if the operator accidentally touches the button switch, the cylinder will not extend, thus ensuring the absolute safety of the operator's hands when installing parts.

[0047] Assembly steps: With the safety locked, the operator's hands can safely enter the area below the punch, place the part to be riveted on the base plate directly below the punch or in a special fixture, and perform preliminary positioning of the part.

[0048] Unlocking and Manual Alignment Steps: After the parts are installed, the operator uses their right hand to pull the handle lever to the left, disengaging it from the step of the switch frame. Once the handle lever is out of the safety lock position, the micro switch lever is released, its normally closed contact returns to the closed state, and the power supply circuit of the solenoid valve becomes standby. Next, the operator pushes the handle lever downward, causing it to swing downward around the first pin shaft. This pushes the first pin shaft through the upper edge of the slot, causing the connecting seat, sliding plate, punch seat, and punch to move downward together. Since this stage is manual, the operator can precisely control the downward distance and position of the punch based on visual observation or tactile feedback until the end face of the punch is precisely aligned with and slightly presses against the riveting part of the part to be riveted. During this process, the operator can repeatedly fine-tune the position of the punch until the alignment is satisfactory. This is an advantage that fully automatic stamping cannot achieve.

[0049] Pneumatic pressure application procedure: Keep the handle in the down position, and press the button switch with the operator's left hand. Since the micro switch is closed at this time, the circuit is connected, the solenoid coil of the solenoid valve is energized, the solenoid valve reverses, and compressed air enters the upper chamber of the cylinder, pushing the telescopic rod to extend downward quickly. The pressure head at the end of the telescopic rod moves downward and first contacts and presses against the upper surface of the punch seat. The pressure generated by the cylinder is transmitted to the punch through the punch seat. The punch concentrates the pressure on the riveting part of the part to be riveted, causing it to produce a preset plastic deformation, thereby completing a reliable riveting connection. Because the cylinder output pressure is large and stable, the riveting deformation is consistent and the product quality is stable.

[0050] Reset Procedure: After riveting is completed, the operator releases the button switch, the solenoid valve is de-energized, and the solenoid valve returns to its initial state under the action of the reset spring. Compressed air enters the lower chamber of the cylinder, pushing the telescopic rod upward to retract. The pressure head leaves the punch seat and moves upward. The operator lifts the handle rod upward, and the handle rod drives the sliding plate and the punch to move upward through the linkage mechanism. At the same time, the handle rod automatically rotates to the right again under the action of the tension spring and falls into the step of the switch frame, returning to the safe locking position. At this time, the operator can safely remove the riveted parts, completing one work cycle.

[0051] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially as indicated, these steps are not necessarily executed in the indicated order. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps.

[0052] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A segmented stamping press, characterized in that, Includes base assembly, sliding assembly, drive assembly, manual operation assembly, and safety control assembly: The base assembly includes a base plate and two columns fixed to the base plate; The sliding assembly includes linear sliding bearings respectively sleeved on the two columns, a sliding plate fixedly connected to the two linear sliding bearings, a punch seat fixed on the sliding plate, and a punch installed on the punch seat. The sliding plate can move up and down along the columns. The drive assembly includes a top plate fixed to the top of the column and a cylinder mounted on the top plate. The manual operation component includes a pivot seat mounted on the base plate, a pivot mounted on the pivot seat that can rotate left and right, a handle rod mounted on the pivot, a spring pull plate fixed on the pivot, and a tension spring connected to the spring pull plate at one end and to the base plate at the other end. The handle rod is linked to the sliding plate, and the handle rod can swing up and down relative to the pivot. The safety control component includes a switch frame mounted on a base plate, a micro switch mounted on the switch frame, a push-button switch mounted on the base plate, and a solenoid valve. The upper part of the switch frame is provided with a step. The air passage interface of the solenoid valve is connected to the cylinder. The control end of the solenoid valve is connected in series with the micro switch, the push-button switch, and an external power supply. The handle has a safety locking position. When the handle is in the safety locking position, it engages with the step of the switch frame and is limited. The handle triggers the micro switch to be in the open state, cutting off the power supply circuit of the solenoid valve. When the handle leaves the safety locking position, the micro switch returns to the closed state, and the power supply circuit of the solenoid valve is in the ready-to-connect state. Furthermore, when the handle moves out of the safety locking position and swings downward, it drives the sliding plate and the punch to move downward.

2. The segmented stamping press as described in claim 1, characterized in that, The handle rod has a strip-shaped hole, the sliding plate has a connecting seat, the connecting seat has a second pin, and the strip-shaped hole is fitted onto the second pin.

3. The segmented stamping press as described in claim 1, characterized in that, The steps of the switchgear are sloping steps.

4. The segmented stamping press as described in claim 1, characterized in that, A pressure head is fixed to the end of the telescopic rod of the cylinder. When the cylinder is working, the telescopic rod extends and the pressure head presses against the upper surface of the punch seat.

5. The segmented stamping press as described in claim 1, characterized in that, There are two linear sliding bearings, and the sliding plate is fixedly connected to the two linear sliding bearings by screws.

6. The segmented stamping press as described in claim 1, characterized in that, The push-button switch is installed on the front left side of the base plate, the switch bracket is installed on the front right side of the base plate, and the pivot seat is installed on the rear side of the base plate.

7. The segmented stamping press as described in claim 1, characterized in that, The solenoid valve is a two-position five-way solenoid valve, which is provided with a compressed gas input port and two output ports. The two output ports are respectively connected to the upper chamber and the lower chamber of the cylinder.

8. The segmented stamping press as described in claim 1, characterized in that, The bottom of the base plate is equipped with four foot pads.

9. The segmented stamping press as described in claim 1, characterized in that, The handle rod is hinged to the top of the rotating shaft via a first pin.

10. A stamping method using a segmented stamping press, characterized in that, include: Safety Lock: When the handle is placed in the safety lock position, the handle engages with the step of the switch frame, the micro switch is in the off state, the solenoid valve is de-energized, and the cylinder is locked and cannot operate. Assembly: Install the part to be riveted below the punch; Unlocking and manual alignment: Move the handle rod out of the safety lock position, the micro switch returns to the closed state, and the power supply circuit of the solenoid valve is ready; then push the handle rod downward, so that the handle rod drives the sliding plate and the punch to move downward until the punch aligns with and presses against the riveting part of the part to be riveted; Pneumatic pressure application: Keep the handle rod in position, press the button switch, the solenoid valve is energized, the telescopic rod of the cylinder extends, driving the pressure head to move downward and press against the punch seat, the pressure generated by the cylinder is transmitted to the punch through the punch seat, and the punch completes the riveting deformation of the part to be riveted, and the riveted part is obtained; Reset: Release the button switch, the cylinder extension rod retracts, lift the handle rod upwards to return the handle rod to the safety lock position, and remove the riveted part.

Images