Stamping die with adjustable bending degree, stamping equipment and application of stamping die and stamping equipment in production of leisure chairs

Abstract

The invention relates to a stamping technology, in particular to a bending-degree-adjustable stamping die, stamping equipment and application of the bending-degree-adjustable stamping die and the stamping equipment in leisure chair production, the bending-degree-adjustable stamping die comprises a stamping machine and further comprises the stamping die, the stamping die is installed on the stamping machine, and an angle adjusting structure connected with the stamping die is installed on the stamping machine. An alternate feeding structure is arranged on the portion, below the stamping die, of the stamping machine, and the alternate feeding structure is connected with the stamping die. By reasonably designing the structure of the punching equipment and the connection relation between all parts of the punching equipment, efficient and convenient operation can be achieved in the punching feeding and discharging process of workpieces, the downtime caused by feeding and discharging actions is remarkably shortened, and therefore the overall machining efficiency is improved; and through cooperation of the driving mechanism and the punching machine, continuous and efficient feeding and discharging are achieved in the punching forming process.

Description

Technical Field

[0001] The invention relates to a stamping technology, in particular to a stamping die with adjustable curvature, a stamping device and application thereof in the production of leisure chairs. Background Art

[0002] Stamping equipment (or punching machine, punch press) is a machine used to stamp metal sheets, strips, pipes and other materials through molds. It is mainly used for metal forming, cutting, bending, stretching, punching and other processes. It is widely used in manufacturing, especially in the automotive, home appliances, electronics, hardware and other industries. Stamping equipment is an efficient and precise manufacturing tool that can meet various production needs, from simple punching to complex metal forming. It is widely used in multiple industrial fields. With the development of technology, modern stamping equipment continues to develop towards high precision, automation and intelligence, greatly improving production efficiency and processing accuracy.

[0003] When the current stamping equipment is in use, during the stamping process, the curvature of the stamped parts is one of the important indicators to measure the forming quality of the workpiece, especially in the production of some parts with high precision requirements. The control of curvature directly affects the quality of the product and the subsequent processing flow. In order to ensure the accuracy of the stamped parts, it is usually necessary to properly adjust the stamping parameters of the stamping equipment to ensure that the curvature of the workpiece is within the design requirements. The adjustment of the curvature of the stamped parts not only affects the qualified rate of each workpiece in the production process, but also affects the overall production rate. Frequent curvature adjustments require additional equipment downtime, reducing the utilization rate of the equipment and the overall production efficiency. At the same time, the coordination between the adjustment of the curvature and the loading and unloading actions also requires more time and energy to balance to ensure the continuity of the production rhythm.

[0004] At the same time, the problem of loading and unloading workpieces is also prominent, usually manual loading and unloading or simple mechanical loading and unloading are used; although manual loading and unloading can be performed directly by the operator, this method will not only lead to a decrease in the stamping production rate, but also bring greater safety hazards. Operators need to frequently contact equipment and workpieces when loading and unloading, which is prone to improper operation or accidents, increasing the risk in the production process. In addition, manual operation is often not efficient enough, especially in large-scale production, the speed of manual loading and unloading cannot keep up with the production rhythm of the stamping equipment, thereby reducing the overall production efficiency.

[0005] On the other hand, when using simple mechanical equipment for loading and unloading, although it can reduce manual operations to a certain extent, the limitations of this method are also very obvious. Generally speaking, the mechanical loading and unloading device can only intervene in the unloading operation of the workpiece after the stamping equipment completes the work stroke such as mold opening and closing. In other words, the working cycle of the mechanical device and the working cycle of the stamping equipment are not completely matched. It is necessary to wait for the stamping equipment to complete a certain action before the mechanical device can start to perform the loading and unloading task; this situation leads to a long waiting time when the equipment is stamping a large number of workpieces; after the stamping equipment completes each round of stamping action, the mechanical device needs to wait before the next loading and unloading operation, resulting in idle and downtime of the equipment; the existence of this waiting time, whether in a high-frequency production cycle or in a large-scale production process, will delay the overall rate of stamping production and affect production efficiency, especially when the production cycle requirements are high, the idle time of the equipment may even occupy a large part of the total production time. Summary of the invention

[0006] The purpose of the present invention is to provide a stamping die with adjustable curvature, a stamping device and the application thereof in the production of leisure chairs, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A stamping die with adjustable curvature comprises a lower die seat and an upper die seat matched with the lower die seat, a notch is provided at the center of one side of the lower die seat, and a rotating seat is symmetrically provided on the lower die seat and the upper die seat;

[0009] A template is rotatably arranged on each rotating seat, and the templates on the lower die seat and the upper die seat are arranged correspondingly. A central axis is fixedly connected to one side of the rotating connection portion between the template and the rotating seat, and a spiral groove is opened on the outer wall of the central axis.

[0010] A stamping device, comprising a stamping machine, and also comprising the stamping die as described above, wherein the stamping die is mounted on the stamping machine, an angle adjustment structure connected to the stamping die is mounted on the stamping machine, and an alternating feeding structure is arranged on the stamping machine below the stamping die, and the alternating feeding structure is connected to the stamping die;

[0011] The alternating feeding structure comprises a frame connected to the punching machine, a driving mechanism arranged on the frame, and a first feeding mechanism and a second feeding mechanism arranged on the frame, wherein the first feeding mechanism and the second feeding mechanism are both connected to the driving mechanism, and a trigger switch is arranged on the punching die, and the trigger switch is electrically connected to the driving mechanism through a host device;

[0012] When the angle adjustment structure is in operation, it is used to adjust the stamping curvature of the workpiece by the stamping die. When the stamping machine is in operation, it drives the stamping die to close or open the die. When the stamping die is in operation, the trigger switch is activated to activate the driving mechanism through the upper device. The driving mechanism is used to drive the first feeding mechanism and the second feeding mechanism to carry the workpiece and alternately run on the frame to the stamping die for stamping processing.

[0013] The stamping equipment as described above: the angle adjustment mechanism includes an adjustment frame, guide posts arranged at the four corners of one side of the adjustment frame, and a cylinder with two piston rods installed at both ends of the adjustment frame;

[0014] The four guide posts are slidably inserted into the corresponding slots on the punching machine, the two cylinders are symmetrically embedded in the punching machine, the inner wall of the adjustment frame has sliding grooves at both ends, the sliding grooves are symmetrically slidably connected with two connecting plates, and each connecting plate is symmetrically fixedly connected with two plug-in tubes;

[0015] A semicircular protrusion is fixedly connected to the inner wall of the plug-in tube, the plug-in tube is slidably plugged with the central shaft, and the semicircular protrusion abuts against a spiral groove formed on the outer wall of the central shaft.

[0016] The stamping equipment as described above: a middle plate is fixedly connected to the bottom center of the frame, a slide groove is provided on the middle plate, and side plates are symmetrically fixedly connected to the frame on both sides of the middle plate; sliding tracks are provided on the tops of both sides of the frame and the tops of the two side plates;

[0017] A first rack is provided at the bottom of one of the side plates away from one end of the stamping die and toward one side of the middle plate, and a second rack is provided at the bottom of the middle plate close to one end of the stamping die and toward one side of the side plate, and the inclination directions of the teeth of the first rack and the second rack are opposite.

[0018] The stamping device as described above: the driving mechanism comprises a motor mounted at one end of the frame and two first screw rods and two second screw rods symmetrically rotatably connected to two sides of the frame;

[0019] One end of one of the first screw rods is coaxially fixed with the output shaft of the motor, and the first screw rod and the second screw rod facing away from one end of the motor are both fixedly connected with gears, and the gears on the first screw rod and the second screw rod located on the same side of the frame are meshed;

[0020] The gears at one end of the two first screw rods are both fixedly connected with a transmission wheel, and the two transmission wheels are connected through belt transmission.

[0021] The stamping equipment as described above: the first feeding mechanism includes a first mounting plate, two first connecting seats symmetrically fixedly connected to the bottom of the first mounting plate, and a first rebound rack assembly fixedly connected to the first mounting plate;

[0022] The two first connecting seats are respectively threadedly connected to the two first screw rods, and the sliding blocks arranged at both ends of the first mounting plate are slidably connected to the sliding rails arranged at both sides of the frame;

[0023] The first rebound frame material component is correspondingly engaged with the slot, and the first rebound frame material component includes a first socket fixedly connected to the first mounting plate and a first lifting block slidably inserted in the first socket, the bottom of the first lifting block abuts against one end of the two first springs, and the other ends of the two first springs abut against the bottom of the cavity of the first socket.

[0024] The stamping equipment as described above: the second feeding mechanism includes a second mounting plate, two second connecting seats symmetrically fixedly connected to both ends of the second mounting plate, a third mounting plate connected to the second mounting plate, a second rebound rack assembly connected to the third mounting plate, and a linkage assembly connected to the second rebound rack assembly;

[0025] Two sliding blocks symmetrically arranged at the bottom of the second mounting plate are slidably connected to the sliding rails arranged at the tops of the two side plates, the two second connecting seats are respectively threadedly connected to the two second screw rods, four sleeves are fixedly connected at the four corners of the second mounting plate, and an L-shaped frame is fixedly connected to the bottom of the second mounting plate;

[0026] Four plug-in columns are fixedly connected at the four corners of the bottom of the third mounting plate, and the four plug-in columns are correspondingly slidably plugged into the four sleeves. A vertical plate is fixedly connected to the bottom of the third mounting plate, and a roller is rotatably connected to the vertical plate, and the roller abuts against the slide groove.

[0027] The stamping equipment as described above: the second rebound frame assembly is correspondingly engaged with the notch, and the second rebound frame assembly includes a second socket slidably connected to the third mounting plate and a second lifting block slidably inserted in the second socket;

[0028] A first threaded hole is opened at the bottom center of the second socket, a second threaded hole is opened at the bottom center of the second lifting block, the bottom of the second lifting block abuts against one end of two second springs, and the other ends of the two second springs abut against the bottom of the cavity of the second socket.

[0029] The stamping equipment as described above: the linkage assembly comprises a first screw rod, a second screw rod slidably connected in the first screw rod, and a transmission shaft connected to the first screw rod, the first screw rod is threadedly connected to the first threaded hole, and the second screw rod is threadedly connected to the second threaded hole;

[0030] The bottom of the first screw is fixedly connected to a first gear, one end of the bottom of the first screw is rotatably connected to the second mounting plate, a prismatic block is slidably connected in the cavity of the first screw, one side of the prismatic block abuts against one end of a third spring, and the other end of the third spring abuts against the bottom of the cavity of the first screw;

[0031] The transmission shaft is rotatably connected to the L-shaped frame, the top of the transmission shaft is fixedly connected with a second gear meshing with the first gear, and the bottom of the transmission shaft is fixedly connected with a third gear meshing with the first rack and the second rack.

[0032] The application of the punching equipment as described above in the production of leisure chairs.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] By rationally designing the structural composition and connection relationship of the stamping die, the curvature of the stamped parts can be effectively controlled during the stamping process of the workpiece. Specifically, this design can match the curvature of the stamping die with the stamping process requirements and can be adjusted according to actual processing needs, thereby avoiding frequent mold replacement. This not only improves production flexibility, but also effectively reduces downtime and costs during the production process.

[0035] By rationally designing the structure of the stamping equipment and the connection relationship between its various components, efficient and convenient operation can be achieved during the loading and unloading process of the workpiece during stamping, significantly reducing the downtime caused by loading and unloading actions, thereby improving the overall processing efficiency. Specifically, the design of the stamping machine can adopt an alternating loading structure, and through the coordinated cooperation of the drive mechanism and the stamping machine, continuous and efficient loading and unloading can be achieved during the stamping process.

[0036] In specific operation, the first feeding mechanism and the second feeding mechanism cooperate with the stamping machine through the driving mechanism, and can alternately run to the stamping die position to stamp the workpiece. When the stamping machine presses down to close the mold, one of the feeding mechanisms sends the workpiece to the mold position for stamping, and the other feeding mechanism is in a standby state at the other end of the equipment frame. After the stamping die completes the stamping of the workpiece, the stamping machine will enter the mold separation state. At this time, through the linkage action of the driving mechanism, the formed workpiece will be transmitted to the other end of the frame by the feeding mechanism, while the other feeding mechanism automatically carries the un-stamped workpiece to the stamping die position to continue stamping. Through the alternating coordination of the feeding mechanism and the linkage design of the driving mechanism, the loading and unloading operations of the workpiece can be smoothly carried out during the closing and parting processes of the stamping die. This design greatly optimizes the loading and unloading process of the workpiece, realizes the seamless connection of the stamping operation, effectively reduces the downtime, and thus improves the overall efficiency of the stamping operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of a stamping die with adjustable curvature;

[0038] Figure 2 It is a schematic diagram of the structure of another aspect of the stamping die with adjustable curvature;

[0039] Figure 3 It is a schematic diagram of the overall structure of the stamping equipment;

[0040] Figure 4 It is a structural schematic diagram of a punching machine in a punching equipment;

[0041] Figure 5 It is a structural schematic diagram of the angle adjustment structure in the stamping equipment;

[0042] Figure 6 It is a structural schematic diagram of an alternating feeding structure in a stamping device;

[0043] Figure 7 It is a structural schematic diagram of the driving mechanism in the stamping equipment;

[0044] Figure 8 It is a schematic diagram of the structure of the middle plate in the stamping equipment;

[0045] Fig. 9 It is a structural schematic diagram of the first feeding mechanism in the stamping equipment;

[0046] Fig.10 It is a structural schematic diagram of the second feeding mechanism in the stamping equipment;

[0047] Fig.11 It is a schematic diagram of the structure of a part of the second feeding mechanism in the stamping equipment;

[0048] Fig.12 It is a structural schematic diagram of the second rebound rack assembly and some linkage assemblies in the stamping equipment;

[0049] Fig.13 It is a schematic diagram of the structure of the first screw and the second screw in the stamping equipment;

[0050] Fig.14 It is a structural schematic diagram of the linkage components in the stamping equipment;

[0051] Fig.15 It is a schematic diagram of the structure of the side plate, rack and middle plate in the stamping equipment.

[0052] In the figure: 1, lower die seat; 2, notch; 3, upper die seat; 4, rotating seat; 5, template; 6, central axis; 7, punch; 8, adjustment frame; 9, cylinder; 10, guide column; 11, sliding groove; 12, connecting plate; 13, plug-in cylinder; 14, frame; 15, side plate; 16, first rack; 17, middle plate; 18, sliding groove; 19, motor; 20, first screw rod; 21, second screw rod; 22, transmission wheel; 23, belt; 24, first mounting plate; 25, first connecting seat; 26, first plug Seat; 27, first lifting block; 28, first spring; 29, second mounting plate; 30, second connecting seat; 31, sleeve; 32, L-shaped frame; 33, plug-in column; 34, third mounting plate; 35, vertical plate; 36, roller; 37, second plug-in seat; 38, second lifting block; 39, second spring; 40, first screw; 41, first gear; 42, prismatic block; 43, third spring; 44, second screw; 45, second gear; 46, transmission shaft; 47, third gear; 48, second rack. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0054] See also Figure 1 , Figure 2 In the embodiment of the present invention, the stamping die with adjustable curvature comprises a lower die base 1 and an upper die base 3 matched with the lower die base 1, a notch 2 is provided at the center of one side of the lower die base 1, and a rotating seat 4 is symmetrically provided on the lower die base 1 and the upper die base 3;

[0055] A template 5 is rotatably arranged on each rotating seat 4, and the templates 5 on the lower die seat 1 and the upper die seat 3 are arranged correspondingly. A central shaft 6 is fixedly connected to one side of the rotational connection portion between the template 5 and the rotating seat 4, and a spiral groove is opened on the outer wall of the central shaft 6.

[0056] In this embodiment, the template 5 at the center axis 6 is rotatably connected to the rotating seat 4, and the two templates 5 respectively arranged on the lower die seat 1 and the upper die seat 3 are arranged in an eight-shaped arrangement. When the workpiece is stamped and formed, the template 5 can be controlled to rotate on the rotating seat 4 by rotating the center axis 6, so that the inclination angle of the template 5 can be adjusted to meet the adjustment of the curvature, reduce the frequency of mold replacement, and improve the use effect.

[0057] See also Figure 3 to Figure 6 In the embodiment of the present invention, the stamping equipment includes a stamping machine 7, and also includes the stamping die as described above, the stamping die is installed on the stamping machine 7, the stamping machine 7 is equipped with an angle adjustment structure connected to the stamping die, and the stamping machine 7 below the stamping die is provided with an alternating feeding structure, and the alternating feeding structure is connected to the stamping die;

[0058] The alternate feeding structure includes a frame 14 connected to the punching machine 7, a driving mechanism arranged on the frame 14, and a first feeding mechanism and a second feeding mechanism arranged on the frame 14, wherein the first feeding mechanism and the second feeding mechanism are both connected to the driving mechanism, and a trigger switch is arranged on the punching die, and the trigger switch is electrically connected to the driving mechanism through a host device;

[0059] When the angle adjustment structure is in operation, it is used to adjust the stamping curvature of the workpiece by the stamping die. When the stamping machine 7 is in operation, it drives the stamping die to close or open the die. When the stamping die is in operation, the trigger switch is activated to activate the driving mechanism through the upper device. The driving mechanism is used to drive the first feeding mechanism and the second feeding mechanism to carry the workpiece and alternately run on the frame 14 to the stamping die for stamping processing.

[0060] In this embodiment, the angle adjustment structure is connected to the stamping die, and the angle adjustment structure can be used to synchronously adjust the inclination angles of the four templates 5 on the stamping die to avoid the situation where the inclination angles of the four templates 5 after adjustment are different when adjusting one template 5 alone, and the precise stamping effect cannot be achieved. Through the design of the driving mechanism on the frame 14 and the electrical connection between the trigger switch provided on the stamping die and the driving mechanism, when the stamping machine 7 controls the closing and parting of the stamping die, the upper equipment can be linked to activate the driving mechanism, and the first feeding mechanism and the second feeding mechanism can alternately carry the workpiece to the stamping die for stamping processing, thereby shortening the downtime due to loading and unloading and improving the stamping efficiency.

[0061] See also Figure 5As a further solution of the present invention, the angle adjustment mechanism includes an adjustment frame 8, guide posts 10 arranged at the four corners of one side of the adjustment frame 8, and a cylinder 9 with two piston rods installed at both ends of the adjustment frame 8;

[0062] The four guide posts 10 are slidably inserted into the corresponding slots on the punch 7, the two cylinders 9 are symmetrically embedded in the punch 7, the inner wall of the adjustment frame 8 is provided with sliding grooves 11 at both ends, the sliding grooves 11 are symmetrically slidably connected with two connecting plates 12, and each connecting plate 12 is symmetrically fixedly connected with two plug-in tubes 13;

[0063] A semicircular protrusion is fixedly connected to the inner wall of the plug-in tube 13 , and the plug-in tube 13 is slidably plugged with the central shaft 6 , and the semicircular protrusion abuts against a spiral groove formed on the outer wall of the central shaft 6 .

[0064] In this embodiment, the plug-in cylinder 13 is sleeved on the central shaft 6, and the semicircular protrusion fixedly arranged on the inner wall of the plug-in cylinder 13 abuts against the spiral groove on the outer wall of the central shaft 6. When the piston rod of the cylinder 9 is telescopically adjusted, the adjustment frame 8 can be adjusted close to or away from the punching machine 7, so that the two connecting plates 12 slidingly connected in the sliding groove 11 opened on the adjustment frame 8 are adjusted synchronously with the adjustment frame 8. The connecting plate 12 is fixedly connected to the plug-in cylinder 13. Therefore, when the connecting plate 12 is adjusted, the plug-in cylinder 13 will move synchronously. The plug-in cylinder 13 is fixed on the connecting plate 12, and the two ends of the connecting plate 12 are slidably connected in the sliding groove 11. Therefore, when the plug-in cylinder 13 moves, the plug-in cylinder 13 The connecting tube 13 ensures that there will be no self-rotation. The semicircular protrusion on the inner wall of the connecting tube 13 abuts against the spiral groove on the outer wall of the central axis 6. Therefore, when the connecting tube 13 moves, the central axis 6 will be forced to rotate, and the central axis 6 is fixedly connected to the template 5. When the central axis 6 is rotated and adjusted, the template 5 will be rotated and adjusted on the rotating seat 4. Through the matching connection, when the cylinder 9 controls the telescopic adjustment of the adjustment frame 8, multiple templates 5 can be rotated and adjusted on the rotating seat 4, and the curvature between the two symmetrically arranged templates 5 can be controlled, so that the workpiece is placed between the two symmetrically arranged groups of templates 5. When the mold is closed and stamped, the workpiece can be stamped and bent to meet the requirements of curvature adjustment.

[0065] See also Figure 7 As a further solution of the present invention, a middle plate 17 is fixedly connected to the bottom center of the frame 14, a slide groove 18 is provided on the middle plate 17, and side plates 15 are symmetrically fixedly connected to the frame 14 on both sides of the middle plate 17; sliding tracks are provided on the tops of both sides of the frame 14 and the tops of the two side plates 15.

[0066] See also Fig.15A first rack 16 is provided at the bottom of one of the side plates 15 away from one end of the stamping die and toward the middle plate 17, and a second rack 48 is provided at the bottom of the middle plate 17 close to one end of the stamping die and toward the side plate 15. The inclination directions of the teeth of the first rack 16 and the second rack 48 are opposite.

[0067] In this embodiment, the frame 14 is used to connect with the punching machine 7 to meet the connection requirements. The design of the middle plate 17 and the side plate 15 meets the installation and use of the second feeding mechanism, ensuring that the workpiece can be carried to achieve the effect of alternating loading and reducing the downtime caused by loading and unloading.

[0068] See also Figure 7 As a further solution of the present invention, the driving mechanism includes a motor 19 installed at one end of the frame 14 and two first screw rods 20 and two second screw rods 21 symmetrically connected to both sides of the frame 14;

[0069] One end of one of the first screw rods 20 is coaxially fixed with the output shaft of the motor 19, and the first screw rod 20 and the second screw rod 21 at one end away from the motor 19 are both fixedly connected with gears, and the gears on the first screw rod 20 and the second screw rod 21 located on the same side of the frame 14 are meshed;

[0070] A transmission wheel 22 is fixedly connected to the gears at one end of the two first screw rods 20 , and the two transmission wheels 22 are connected by a belt 23 .

[0071] In this embodiment, when the motor 19 is operated, it can drive one of the first screw rods 20 to rotate. Since the two first screw rods 20 on both sides of the frame 14 are driven by the transmission wheel 22 and the belt 23, they can be rotated synchronously in one direction, and the two first screw rods 20 can engage the gear at one end of the second screw rod 21 through a gear fixedly connected at one end to rotate, so that the second screw rod 21 can rotate synchronously in the opposite direction to the first screw rod 20, and the first feeding mechanism and the second feeding mechanism can be driven by the driving mechanism to achieve alternating movement, thereby meeting the driving effect of alternating feeding.

[0072] See also Fig. 9 As a further solution of the present invention, the first feeding mechanism includes a first mounting plate 24, two first connecting seats 25 symmetrically fixedly connected to the bottom of the first mounting plate 24, and a first rebound rack assembly fixedly connected to the first mounting plate 24;

[0073] The two first connecting seats 25 are respectively threadedly connected to the two first screw rods 20, and the sliding blocks arranged at both ends of the first mounting plate 24 are slidably connected to the sliding rails arranged at both sides of the frame 14;

[0074] The first rebound frame material component is correspondingly engaged with the slot 2, and the first rebound frame material component includes a first socket 26 fixedly connected to the first mounting plate 24 and a first lifting block 27 slidably inserted in the first socket 26, the bottom of the first lifting block 27 abuts against one end of two first springs 28, and the other ends of the two first springs 28 abut against the bottom of the cavity of the first socket 26.

[0075] In this embodiment, a straight tube workpiece is engaged with the first lifting block 27. Under the rebound force of the first spring 28, the straight tube workpiece on the first lifting block 27 can be higher than the highest point of the template 5 set on the lower die base 1. Since the first rebound frame material component is correspondingly engaged with the slot 2, when the first mounting plate 24 moves to the bottom of the lower die base 1, the first connector 26 will be engaged in the slot 2. At this time, the straight tube workpiece on the first lifting block 27 is between the templates 5 set on the lower die base 1 and the upper die base 3. When the lower die base 1 and the upper die base 3 are closed by the action of the punching machine 7, the straight tube workpiece on the first lifting block 27 can be stamped and formed, and the straight tube workpiece can be bent. When the first lifting block 27 is lifted and lowered, downward pressure will be applied to the first lifting block 27, which will cause the first lifting block 27 to drop and shrink in the first socket 26. The first spring 28 is squeezed and shrunk to maintain the rebound force. After the straight tube workpiece on the first lifting block 27 is stamped and formed, when the lower die seat 1 and the upper die seat 3 are separated under the action of the punching machine 7, the first spring 28 rebounds and causes the first lifting block 27 to rise. At this time, the workpiece bent by stamping on the first lifting block 27 will be higher than the highest point of the two templates 5 on the lower die seat 1. When the driving mechanism is actuated, the first mounting plate 24 can be slid and adjusted, and the first lifting block 27 can carry the stamped workpiece out of the stamping die position to realize the material unloading operation requirements.

[0076] See also Figure 10 to Figure 14 As a further solution of the present invention, the second feeding mechanism includes a second mounting plate 29, two second connecting seats 30 symmetrically fixedly connected to both ends of the second mounting plate 29, a third mounting plate 34 connected to the second mounting plate 29, a second rebound rack assembly connected to the third mounting plate 34, and a linkage assembly connected to the second rebound rack assembly;

[0077] Two sliding blocks symmetrically arranged at the bottom of the second mounting plate 29 are slidably connected to the sliding rails arranged at the tops of the two side plates 15, and the two second connecting seats 30 are respectively threadedly connected to the two second screw rods 21. Four sleeves 31 are fixedly connected at the four corners of the second mounting plate 29, and an L-shaped frame 32 is fixedly connected at the bottom of the second mounting plate 29.

[0078] Four plug-in columns 33 are fixedly connected at the four corners of the bottom of the third mounting plate 34, and the four plug-in columns 33 are correspondingly slidably inserted in the four sleeves 31. A vertical plate 35 is fixedly connected to the bottom of the third mounting plate 34, and a roller 36 is rotatably connected to the vertical plate 35, and the roller 36 abuts against the slide groove 18.

[0079] The second rebound frame assembly is correspondingly engaged with the notch 2, and the second rebound frame assembly includes a second plug-in seat 37 slidably connected to the third mounting plate 34 and a second lifting block 38 slidably plugged into the second plug-in seat 37;

[0080] A first threaded hole is opened at the bottom center of the second socket 37, and a second threaded hole is opened at the bottom center of the second lifting block 38. The bottom of the second lifting block 38 abuts against one end of two second springs 39, and the other ends of the two second springs 39 abut against the bottom of the cavity of the second socket 37.

[0081] The linkage assembly includes a first screw rod 40, a second screw rod 44 slidably connected in the first screw rod 40, and a transmission shaft 46 connected to the first screw rod 40, wherein the first screw rod 40 is threadedly connected to the first threaded hole, and the second screw rod 44 is threadedly connected to the second threaded hole;

[0082] A first gear 41 is fixedly connected to the bottom of the first screw rod 40, one end of the bottom of the first screw rod 40 is rotatably connected to the second mounting plate 29, a prismatic block 42 is slidably connected in the cavity of the first screw rod 40, one side of the prismatic block 42 abuts against one end of a third spring 43, and the other end of the third spring 43 abuts against the bottom of the cavity of the first screw rod 40;

[0083] The transmission shaft 46 is rotatably connected to the L-shaped frame 32 , the top of the transmission shaft 46 is fixedly connected to a second gear 45 meshing with the first gear 41 , and the bottom of the transmission shaft 46 is fixedly connected to a third gear 47 meshing with the first rack 16 and the second rack 48 .

[0084] In this embodiment, when the motor 19 drives the first screw rod 20 to rotate, the second screw rod 21 rotates synchronously. The rotation directions of the first screw rod 20 and the second screw rod 21 are opposite due to the meshing of the gears at both ends. When the first screw rod 20 rotates to make the first feeding mechanism move toward the end away from the stamping die, the second feeding mechanism will move toward the end of the stamping die. When the first feeding mechanism and the second feeding mechanism move, the vertical plate 35 fixedly connected to the bottom of the third mounting plate 34 is rotatably connected with a roller 36, and the roller 36 abuts against the slide groove 18. Since the slide groove 18 is a slot with a high center bottom at both ends and a continuous connection and a smooth transition, when the roller 36 moves to the bottom of the slide groove 18, the third mounting plate 34 will be plugged into the sleeve 31 through the plug-in column 33, so that the distance between the third mounting plate 34 and the second mounting plate 29 is reduced;

[0085] At this time, the height of the third mounting plate 34 is lower than that of the first mounting plate 24. When the second mounting plate 29 moves toward one end of the stamping die, the third gear 47 meshes with the first rack 16 on the side plate 15 and rotates forwardly. When the third gear 47 rotates, the first screw 40 can be linked to rotate. The first screw 40 is threadedly connected with the first threaded hole on the second socket 37. The second screw 44 is slidably inserted into the first screw 40 through the prismatic block 42, and a third spring 43 is provided between the prismatic block 42 and the bottom cavity of the first screw 40. The second screw 44 is threadedly connected with the second threaded hole on the second lifting block 38. When the second mounting plate 29 moves from the end away from the stamping die to the stamping die, the first screw 40 and the second screw 44 rotate synchronously in one direction. At this time, the second lifting block 38 will descend in the second socket 37, and the second socket 37 slides and descends on the third mounting plate 34.

[0086] At this time, the height of the unpunched workpiece engaged on the second lifting block 38 is lower than the height of the first mounting plate 24, and can pass from under the first mounting plate 24. When the third gear 47 disengages from the first rack 16 fixedly arranged on the side plate 15 away from one end of the stamping die, the second plug-in seat 37 and the second lifting block 38 are self-locked by the first screw 40 and the second screw 44. The second plug-in seat 37 and the second lifting block 38 will not rise, meeting the passing requirement under the first mounting plate 24. Since the two first connecting seats 25 on the first mounting plate 24 are threadedly connected to the first screw rod 20, and the second connecting seat 30 on the second mounting plate 29 is threadedly connected to the second screw rod 21 under the first screw rod 20, the positional relationship between the two does not interfere with each other, meeting the effect of alternating operation.

[0087] When the roller 36 is about to move to the top of the slide slot 18, the first feeding mechanism and the second feeding mechanism complete the intersection and give way, and the third mounting plate 34 rises on the second mounting plate 29 under the top contact force of the roller 36 sliding along the slide slot 18. The four plug-in columns 33 are plugged into the four sleeves 31 provided on the corresponding second mounting plate 29 to limit the vertical lifting movement of the third mounting plate 34. At this time, the third gear 47 will mesh with the second rack 48 fixedly provided on the middle plate 17, which will cause the third gear 47 to reverse. When the third gear 47 reverses, the first screw 40 and the second screw 44 rotate synchronously, so that the second lifting block 38 rises in the second plug-in seat 37, and the second plug-in seat 37 rises on the third mounting plate 34. When the second lifting block 38 is about to move to the stamping die position When the second lifting block 38 is in the state of being pressed, the workpiece placed on the second lifting block 38 will be higher than the highest point of the template 5 on the lower die base 1, the second plug-in seat 37 will be engaged in the notch 2, and the workpiece on the second lifting block 38 will be between the lower die base 1 and the template 5 set on the upper die base 3 for stamping. During stamping, the second lifting block 38 will be pressed down and contracted into the second plug-in seat 37, the second spring 39 will be squeezed to maintain a rebound tendency, and the second screw rod 44 will be slidably plugged with the first screw rod 40 through the prismatic block 42, and the second screw rod 44 is not threadedly connected to the inner wall of the first screw rod 40, so the second screw rod 44 can be vertically lifted and lowered in the cavity of the first screw rod 40, and when the second lifting block 38 is pressed down, the second screw rod 44 will be retracted into the first screw rod 40, so that the third spring 43 maintains a rebound force to meet the stamping requirements;

[0088] When the mold is separated, the extruded third spring 43 and the second spring 39 rebound, which can make the second lifting block 38 rise and reset in the second socket 37, so that the workpiece after stamping on the second lifting block 38 is higher than the highest point of the template 5 set on the lower die seat 1, thereby realizing the unloading operation. When the second mounting plate 29 moves away from the stamping die, the third gear 47 engages with the second rack 48 on the middle plate 17 and rotates forward. At this time, the first screw 40 and the second screw 44 will make the second socket 37 and the second lifting block 38 descend, which can meet the passing requirements under the first mounting plate 24 and ensure the use effect of alternating loading.

[0089] The application of the punching equipment as described above in the production of leisure chairs.

[0090] The above embodiments are exemplary rather than restrictive, so the technical solutions of the present invention that can be implemented in other specific forms without departing from the spirit or basic features of the present invention are all included in the present invention.

Claims

1. A stamping die with adjustable curvature, comprising a lower die base (1) and an upper die base (3) matched with the lower die base (1), characterized in that: A notch (2) is provided at the center of one side of the lower die seat (1), and a rotating seat (4) is symmetrically rotatably provided on the lower die seat (1) and the upper die seat (3); A template (5) is rotatably arranged on each rotating seat (4), and the templates (5) on the lower die seat (1) and the upper die seat (3) are arranged correspondingly. A central shaft (6) is fixedly connected to one side of the rotational connection portion between the template (5) and the rotating seat (4), and a spiral groove is provided on the outer wall of the central shaft (6).

2. A stamping device, comprising a stamping machine (7), characterized in that: It also comprises the stamping die according to claim 1, wherein the stamping die is mounted on the stamping machine (7), an angle adjustment structure connected to the stamping die is mounted on the stamping machine (7), and an alternating feeding structure is arranged on the stamping machine (7) below the stamping die, and the alternating feeding structure is connected to the stamping die; The alternating feeding structure comprises a frame (14) connected to the punching machine (7), a driving mechanism arranged on the frame (14), and a first feeding mechanism and a second feeding mechanism arranged on the frame (14), wherein the first feeding mechanism and the second feeding mechanism are both connected to the driving mechanism, and a trigger switch is arranged on the punching die, and the trigger switch is electrically connected to the driving mechanism through a host device; When the angle adjustment structure is in operation, it is used to adjust the stamping curvature of the workpiece by the stamping die. When the stamping machine (7) is in operation, it drives the stamping die to close or open the die. When the stamping die is in operation, the trigger switch is activated to activate the drive mechanism through the upper device. The drive mechanism is used to drive the first feeding mechanism and the second feeding mechanism to carry the workpiece and alternately run on the frame (14) to the stamping die for stamping processing.

3. The stamping equipment according to claim 2, characterized in that The angle adjustment mechanism comprises an adjustment frame (8), guide columns (10) arranged at four corners of one side of the adjustment frame (8), and a cylinder (9) with two piston rods installed at both ends of the adjustment frame (8); The four guide columns (10) are slidably inserted into corresponding slots on the punching machine (7), the two cylinders (9) are symmetrically embedded in the punching machine (7), the inner wall of the adjustment frame (8) is provided with sliding grooves (11) at both ends, the sliding grooves (11) are symmetrically slidably connected with two connecting plates (12), and each connecting plate (12) is symmetrically fixedly connected with two plug-in tubes (13); A semicircular protrusion is fixedly connected to the inner wall of the plug-in tube (13); the plug-in tube (13) is slidably plugged with the central shaft (6); and the semicircular protrusion abuts against a spiral groove formed on the outer wall of the central shaft (6).

4. The stamping equipment according to claim 2, characterized in that A middle plate (17) is fixedly connected to the center of the bottom of the frame (14), a slide groove (18) is provided on the middle plate (17), and side plates (15) are symmetrically fixedly connected to the frame (14) on both sides of the middle plate (17); sliding tracks are provided on the tops of both sides of the frame (14) and the tops of the two side plates (15); A first rack (16) is provided at the bottom of one of the side plates (15) away from one end of the stamping die and facing one side of the middle plate (17), and a second rack (48) is provided at the bottom of the middle plate (17) close to one end of the stamping die and facing one side of the side plate (15), and the inclination directions of the teeth of the first rack (16) and the second rack (48) are opposite.

5. The stamping equipment according to claim 2, characterized in that: The driving mechanism comprises a motor (19) mounted at one end of the frame (14) and two first screw rods (20) and two second screw rods (21) symmetrically rotatably connected to two sides of the frame (14); One end of one of the first screw rods (20) is coaxially fixed to the output shaft of the motor (19), and gears are fixedly connected to the first screw rod (20) and the second screw rod (21) at one end away from the motor (19), and the gears on the first screw rod (20) and the second screw rod (21) located on the same side of the frame (14) are meshed; A transmission wheel (22) is fixedly connected to the gears at one end of the two first screw rods (20), and the two transmission wheels (22) are connected by a belt (23).

6. The punching equipment according to claim 2, characterized in that: The first feeding mechanism comprises a first mounting plate (24), two first connecting seats (25) symmetrically fixedly connected to the bottom of the first mounting plate (24), and a first rebound rack assembly fixedly connected to the first mounting plate (24); The two first connecting seats (25) are respectively threadedly connected to the two first screw rods (20), and the sliding blocks arranged at both ends of the first mounting plate (24) are slidably connected to the sliding rails arranged on both sides of the frame (14); The first rebound frame material component is correspondingly engaged with the notch (2), and the first rebound frame material component includes a first plug-in seat (26) fixedly connected to the first mounting plate (24) and a first lifting block (27) slidably inserted in the first plug-in seat (26), the bottom of the first lifting block (27) abuts against one end of two first springs (28), and the other ends of the two first springs (28) abut against the bottom of the cavity of the first plug-in seat (26).

7. The punching equipment according to claim 2, characterized in that: The second feeding mechanism comprises a second mounting plate (29), two second connecting seats (30) symmetrically fixedly connected to two ends of the second mounting plate (29), a third mounting plate (34) connected to the second mounting plate (29), a second rebound rack assembly connected to the third mounting plate (34), and a linkage assembly connected to the second rebound rack assembly; Two sliding blocks symmetrically arranged at the bottom of the second mounting plate (29) are slidably connected to sliding rails arranged at the tops of the two side plates (15); the two second connecting seats (30) are respectively threadedly connected to the two second screw rods (21); four sleeves (31) are fixedly connected at the four corners of the second mounting plate (29); and an L-shaped frame (32) is fixedly connected to the bottom of the second mounting plate (29); Four plug-in columns (33) are fixedly connected at the four corners of the bottom of the third mounting plate (34), and the four plug-in columns (33) are correspondingly slidably plugged into the four sleeves (31). A vertical plate (35) is fixedly connected to the bottom of the third mounting plate (34), and a roller (36) is rotatably connected to the vertical plate (35), and the roller (36) abuts against the slide groove (18).

8. The punching device according to claim 7, characterized in that: The second rebound frame assembly is correspondingly engaged with the notch (2), and the second rebound frame assembly comprises a second plug-in seat (37) slidably connected to the third mounting plate (34) and a second lifting block (38) slidably plugged into the second plug-in seat (37); A first threaded hole is provided at the center of the bottom of the second socket (37), and a second threaded hole is provided at the center of the bottom of the second lifting block (38). The bottom of the second lifting block (38) abuts against one end of two second springs (39), and the other ends of the two second springs (39) abut against the bottom of the cavity of the second socket (37).

9. The punching equipment according to claim 7, characterized in that: The linkage assembly comprises a first screw rod (40), a second screw rod (44) slidably connected inside the first screw rod (40), and a transmission shaft (46) connected to the first screw rod (40), wherein the first screw rod (40) is threadedly connected to the first threaded hole, and the second screw rod (44) is threadedly connected to the second threaded hole; The bottom of the first screw rod (40) is fixedly connected to a first gear (41), one end of the bottom of the first screw rod (40) is rotatably connected to the second mounting plate (29), a prismatic block (42) is slidably connected in the cavity of the first screw rod (40), one side of the prismatic block (42) abuts against one end of a third spring (43), and the other end of the third spring (43) abuts against the bottom of the cavity of the first screw rod (40); The transmission shaft (46) is rotatably connected to the L-shaped frame (32); the top of the transmission shaft (46) is fixedly connected to a second gear (45) meshing with the first gear (41); and the bottom of the transmission shaft (46) is fixedly connected to a third gear (47) meshing with the first rack (16) and the second rack (48).

10. Use of the punching device according to any one of claims 2 to 9 in the production of leisure chairs.

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