Stamping die with die head capable of being rapidly replaced

Abstract

The invention relates to the technical field of metal dies, in particular to a stamping die with a die head capable of being quickly replaced, which comprises a lower die holder and an upper die holder, a female die is fixed on the lower die holder, a male die is mounted on the upper die holder, a guide post is fixed on the lower die holder, and the bottom of the upper die holder is slidably connected with the upper end of the guide post; the top of the upper die base is connected with a fixing plate through a fixing column. A feeding assembly is further arranged on one side of the lower die base and electrically connected with a controller. The male die comprises an upper male die body and a lower male die body, and a die changing assembly is connected between the upper male die body and the lower male die body. Through the arrangement of the mold changing assembly, the mold head can be replaced only by adjusting the position of the transfer column, the effect that one set of mold is used for preparing two products is achieved, meanwhile, the height consistency of the products can be guaranteed, and the problems that in the prior art, multiple sets of molds need to be manufactured for replacement and can only be replaced through disassembly are solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal molds, in particular to a stamping mold with a mold head that can be quickly replaced. Background Art

[0002] With the continuous development of industrial production, metal stamping technology is widely used in industries such as automobiles, home appliances, and electronic products. In the metal stamping process, molds, as key tools, play a vital role. However, in actual production, due to different needs and diverse product types, molds of different shapes and specifications are often required to produce different products. Therefore, mold replacement and adjustment become particularly important.

[0003] At present, the replacement of metal stamping dies usually requires manual operation, and the replacement process is cumbersome, time-consuming and inefficient. Since the molds are usually heavy and bulky, mold replacement requires a lot of manpower and material resources, which directly affects the efficiency and cost of production. In addition, the manufacturing cost of the mold is high. In order to meet the needs of different products, companies usually need to manufacture multiple molds of different specifications, which further increases the production cost.

[0004] The existing mold head replacement methods are mainly divided into two categories: one is the traditional manual disassembly and replacement, which is cumbersome and takes a long time; the other is the use of mechanical devices to replace the mold. Although it is more efficient, such devices are often complex in structure and have high maintenance costs.

[0005] Chinese patent CN221169484U discloses a stamping die with a replaceable die head, comprising a fixed seat, a fixed lower die and a movable lower die arranged on the top of the fixed seat, an upper die arranged above the fixed lower die and the movable lower die, a vertical guide rod arranged between the upper die and the fixed seat, and an adjustment component arranged inside the upper die, wherein the adjustment component comprises a through hole arranged on the top of the upper die, an assembly groove arranged inside the through hole, an assembly semi-ring arranged inside the assembly groove, and assembly accessories arranged at both ends of the assembly semi-ring. The stamping die with a replaceable die head is provided with a plurality of stamping head assemblies. When in use, a corresponding number of stamping head assemblies are installed according to processing requirements. In this way, during the processing, the switching of different stamping head assemblies can be realized by rotating the disk. Such a switching method is fast and convenient, can save a lot of time, is conducive to improving work efficiency, and enhances the safety of equipment operation.

[0006] The above patent realizes the switching of molds by setting a turntable to rotate without disassembly, but its structure is relatively complex, and it is difficult to position and prepare for rotation, and multiple mold heads need to be made, which has a very high cost. Therefore, a stamping mold with a mold head that can be replaced without disassembly or rotation is developed. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to propose a stamping die with a quickly replaceable die head. Through the setting of the variable die assembly, when replacing, only the position of the adapter column needs to be adjusted to realize the replacement of the die head, so that one set of molds can be used to prepare two products. At the same time, the height consistency of the products can be ensured. Furthermore, the feed size can be adjusted through the pressure change of the airbag, thereby achieving the effect of reducing the generation of waste, and solving the problem in the prior art that multiple sets of molds need to be made for replacement and the molds need to be disassembled for replacement.

[0008] In order to achieve the above object, the present invention provides the following technical solutions: The present invention claims protection for a stamping die capable of quickly replacing a die head, comprising a lower die base and an upper die base, wherein a concave die is fixed on the lower die base, a convex die is mounted on the upper die base, a guide column is fixed on the lower die base, and the bottom of the upper die base is slidably connected to the upper end of the guide column; a fixed plate is connected to the top of the upper die base through a fixed column; a feeding assembly is also provided on one side of the lower die base, and the feeding assembly is electrically connected to a controller; The punch comprises an upper punch and a lower punch, and a die-changing assembly is connected between the upper punch and the lower punch; A first stepped through hole is provided on the upper die seat, and the upper punch and the lower punch are both slidably connected in the first stepped through hole, and the upper punch and the lower punch are slidably connected with each other; the upper punch is an inverted stepped type, and a first spring is provided between the upper punch and the stepped opening of the upper die seat; the top of the first spring abuts against the stepped opening of the upper punch, and the bottom of the first spring abuts against the stepped opening of the upper die seat.

[0009] Preferably, a cavity is provided in the lower punch, a plurality of first vertical through holes are further provided at the bottom of the lower punch, the cavity is communicated with the plurality of first vertical through holes, U-shaped grooves are provided on the lower punches at both sides of the cavity, the two U-shaped grooves are communicated with the cavity, a second vertical through hole is further provided on the lower punch at the upper end of the U-shaped groove, the second vertical through hole is communicated with the cavity; a groove is further provided at the top of the lower punch; The upper punch is provided with an M-shaped groove, and the M-shaped groove is connected to the bottom of the upper punch.

[0010] Preferably, the variable mold assembly includes a horizontal plate, which is located in the cavity, and a plurality of columns are connected to the bottom of the horizontal plate, and the columns are all slidably inserted in the first vertical through hole; an adapter column is rotatably connected to the horizontal plate, and a positioning shaft is inserted and fixed on the adapter column, and both ends of the positioning shaft extend out of the lower punch through a U-shaped groove; two cables are fixedly connected to the top of the adapter column, and the other ends of the two cables are inserted into the M-shaped groove, and are respectively passed through the two ends of the M-shaped groove and fixedly connected to the bottom wall of the groove of the lower punch; an electric telescopic cylinder is fixed to the bottom of the upper punch, and the lower end of the electric telescopic cylinder abuts against the groove of the lower punch.

[0011] Preferably, an airbag is fixedly installed in the groove, and the top of the airbag contacts the bottom of the upper punch; a pressure sensor is installed on the airbag; and the pressure sensor is electrically connected to a controller.

[0012] Preferably, the feeding assembly includes a mounting plate fixed to one end of the lower die base, the mounting plate is arranged on both sides of the lower die base, a feeding roller is rotatably connected between the two mounting plates, the two feeding rollers are arranged in a vertical direction, the feeding roller located on the lower side is located under the lower die base, and the feeding roller located on the upper side is located on the lower die base, one end of the two feeding rollers are fixed with gears, and the two gears are meshed with each other; a motor is fixedly installed on the outer side of one side mounting plate, the output shaft of the motor is fixedly connected to one end of a feeding roller, and the motor is electrically connected to the controller.

[0013] Preferably, a sliding bar is provided on the side wall of the lower end of the upper punch, and a sliding groove is provided on the inner wall of the lower punch located at the groove, and the upper punch and the lower punch are connected in a limited sliding manner through the sliding bar and the sliding groove.

[0014] Preferably, threaded holes are formed around the lower die base, screws are threadedly connected to the threaded holes, and positioning blocks are fixed on the screw heads; and grooves matching the screws and the positioning blocks are provided on the upper die base.

[0015] Preferably, a hole is opened at the bottom of the upper die seat, and the top of the guide column is slidably connected to the hole of the upper die seat; a second spring is sleeved on the guide column, the bottom of the second spring abuts against the upper surface of the punch and die, and the top of the second spring abuts against the lower surface of the upper die seat.

[0016] Preferably, a second stepped through hole is provided on the fixing plate, a power output rod is installed in the second stepped through hole, a mounting ring is provided on the power output rod, a third spring is provided between the bottom of the mounting ring and the step of the second stepped through hole, the top of the third spring abuts against the bottom of the mounting ring, and the bottom of the third spring abuts against the step of the second stepped through hole.

[0017] The present invention also claims a method for using a stamping die capable of quickly replacing a die head, comprising the following steps: S1: Move the positioning shaft to the top of the cavity and use the upper end of the U-shaped groove to position and fix it, then drive the electric telescopic cylinder to extend, the bottom of the electric telescopic cylinder abuts against the bottom wall of the groove of the lower punch, at this time the column is located inside the first vertical through hole, then pass the raw material through the two feeding rollers to the die, and by adjusting the tightness of the screw, press the raw material on the upper surface of the die in the thickness direction through the positioning block; S2: Start the equipment and control the motor to feed accurately intermittently. After the motor starts, the two feeding rollers feed intermittently according to the meshing of the gears, and the punch press performs punching intermittently. After the feeding roller feeds once, the punch press drives the die head to punch once, and the cycle continues. During punching, the power output rod of the equipment moves down, driving the fixed plate and the upper die seat to move down together. After the upper die seat moves down and compresses the second spring into place, the power output rod continues to move down, pressing the third spring, driving the punch to extend along the first spring to the punching groove of the die, completing the processing of the workpiece. Subsequently, the punch, the upper die seat and the fixed plate are reset to complete a punching, and the product is punched according to the original die head. When the die head needs to be replaced, stop the motor to continue feeding, and stop the die head from punching; S3: First, drive the electric telescopic cylinder to retract, and drive the adapter column to rotate by rotating the positioning shaft. The positioning shaft rotates from the top of the U-shaped groove and moves downward to the bottom of the U-shaped groove. It is clamped at the bottom of the U-shaped groove by horizontal rotation. At this time, the horizontal plate drives the column to move downward, and the bottom of the column extends out of the bottom of the first vertical through hole. The bottom shape of the mold head is changed by the setting of multiple columns. At the same time, in the process of the horizontal plate moving downward, the cable connected to the top of the adapter column moves downward, and one end of the cable moves downward, and the other ends of the two cables move upward, so that the cable drives the lower punch to move upward, and the mold head is replaced. After replacement, drive the electric telescopic cylinder to extend, and the bottom of the electric telescopic cylinder abuts against the bottom wall of the groove of the lower punch, so that the height of the product stamped by the mold is consistent with the original formation; S4: Further, in the process of the cable driving the lower punch to move upward, the airbag is compressed, and the pressure sensor on the airbag transmits the detected data to the controller through the pressure change of the airbag compression, and the controller controls the motor to perform the next feeding mode to complete the replacement; S5: Start the motor and the machine tool to continue running, punching and changing the product behind the die head.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The mold-changing assembly provided in the present invention, when being replaced, by adjusting the transfer column, when the transfer column is moved from the upper end to the lower end of the U-shaped groove, the electric telescopic rod is first retracted, and then the transfer shaft is rotated to move the transfer shaft from the upper end to the lower end of the U-shaped groove, and is engaged. During the process of the transfer shaft moving downward, the horizontal plate moves downward to drive the column downward, and the bottom of the column extends out of the bottom of the lower punch. At this time, the bottom of the lower punch changes from the original shape to a shape formed by multiple columns; at the same time, while moving downward the horizontal plate, the cable at one end of the top of the transfer column also moves downward, driving the other end of the cable to slide in the M-shaped groove and move upward. At this time, the lower punch moves along the matching groove and the sliding bar. The upper and lower punches are fixed by sliding together and moving upward, so that the length of the bottom column of the punch is consistent with the length of the upper soil mold, so that the height of the products produced by the two mold heads is consistent. After the change is completed, the electric telescopic rod is driven to extend, and the bottom of the electric telescopic cylinder is abutted against the bottom of the groove to achieve the length fixation between the upper punch and the lower punch. The mold change assembly of the present invention only needs to adjust the position of the adapter column to realize the replacement of the mold head, so that one set of molds can be used to prepare two products. While the change is simple, the height consistency of the products can be guaranteed, which solves the problem of needing to make two sets of molds and disassembling them for replacement in the prior art, saving resources.

[0019] (2) In addition to replacing the mold, the mold-changing assembly of the present invention further has an airbag installed in the groove. The pressure of the airbag changes with the change in the length of the groove matched between the upper punch and the lower punch. When the original mold is used, the airbag is not subjected to pressure, and the motor feeds at a normal feeding speed. After the mold head is changed, the upper punch moves up, and the area of ​​the bottom of the mold head becomes smaller, thereby reducing the amount of material used. After the upper punch moves up, the airbag is pressurized and the internal pressure increases. At this time, the pressure sensor installed on the airbag drives the motor to slow down the rotation according to the detected pressure change, thereby reducing the feeding size and achieving the effect of reducing the generation of waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a stamping die capable of quickly replacing a die head according to the present invention; Figure 2 It is a schematic diagram of the overall structure of a stamping die capable of quickly replacing a die head according to the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of a punch of a stamping die capable of quickly replacing a die head according to the present invention; Figure 4 It is a schematic cross-sectional structure diagram of a die-changing assembly of a stamping die capable of quickly replacing a die head according to the present invention; Figure 5 It is a schematic diagram of the front view of the convex die cross-section structure of a stamping die capable of quickly replacing the die head of the present invention; Figure 6 It is a schematic diagram of a side view of a punch section structure of a stamping die capable of quickly replacing a die head according to the present invention; Figure 7 It is a schematic structural diagram of a die-changing assembly of a stamping die capable of quickly replacing a die head according to the present invention; Figure 8 It is a schematic structural diagram of a punch of a stamping die capable of quickly replacing a die head according to the present invention; Fig. 9 It is a schematic cross-sectional structure diagram of a power output shaft of a stamping die capable of quickly replacing a die head according to the present invention; Fig.10 The present invention is a schematic diagram of the cross-sectional structure of a feeding assembly of a stamping die capable of quickly replacing a die head.

[0021] In the figure: 100, lower die base; 200, concave die; 300, guide column; 400, upper die base; 500, punch; 600, fixing plate; 700, variable die assembly; 800, feeding assembly; 110, screw; 120, positioning block; 310, second spring; 410, first stepped through hole; 510, upper punch; 520, lower punch; 530, first spring; 511, M-shaped groove; 512, sliding bar; 521, cavity; 522, first vertical through hole; 5 23. U-shaped groove; 524. second vertical through hole; 525. groove; 526. sliding groove; 610. second stepped through hole; 620. power output rod; 630. mounting ring; 640. third spring; 710. cross plate; 720. column; 730. adapter column; 740. positioning shaft; 750. cable; 760. electric telescopic cylinder; 770. airbag; 771. pressure sensor; 810. mounting plate; 820. feed roller; 830. gear; 840. motor. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In addition, the embodiments of the present invention and the features in the embodiments may be combined with each other if there is no conflict.

[0023] Example 1

[0024] like Figure 1 to Figure 10As shown, a stamping die capable of quickly replacing a die head comprises a lower die base 100 and an upper die base 400, wherein a concave die 200 is fixed on the lower die base 100, a convex die 500 is installed on the upper die base 400, a guide column 300 is fixed on the lower die base 100, and the bottom of the upper die base 400 is slidably connected to the upper end of the guide column 300; a fixing plate 600 is connected to the top of the upper die base 400 through a fixing column; a feeding assembly 800 is also provided on one side of the lower die base 100, and the feeding assembly 800 is electrically connected to a controller; The punch 500 includes an upper punch 510 and a lower punch 520, and a mold changing assembly 700 is connected between the upper punch 510 and the lower punch 520; A first stepped through hole 410 is provided on the upper die base 400, and the upper punch 510 and the lower punch 520 are both slidably connected in the first stepped through hole 410, and the upper punch 510 and the lower punch 520 are slidably connected with each other; the upper punch 510 is an inverted stepped type, and a first spring 530 is provided between the upper punch 510 and the stepped mouth of the upper die base 400; the top of the first spring 530 abuts against the stepped mouth of the upper punch 510, and the bottom of the first spring 530 abuts against the stepped mouth of the upper die base 400.

[0025] During installation, the lower die base 100 is installed on the machine table, and the feeding assembly 800 is used to transfer the raw materials to the die 200. The die 200 and the punch 500 cooperate to complete the forming of the workpiece; it should be noted that the groove hole in the middle of the die 200 corresponds to the position of the punch 500.

[0026] In this embodiment, a cavity 521 is provided in the lower punch 520, and a plurality of first vertical through holes 522 are further provided at the bottom of the lower punch 520, and the cavity 521 is communicated with the plurality of first vertical through holes 522. The lower punch 520 located on both sides of the cavity 521 is provided with U-shaped grooves 523, and the two U-shaped grooves 523 are both communicated with the cavity 521. The lower punch 520 located at the upper end of the U-shaped groove 523 is further provided with a second vertical through hole 524, and the second vertical through hole 524 is communicated with the cavity 521; the top of the lower punch 520 is further provided with a groove 525; The upper punch 510 is provided with an M-shaped groove 511 , and the M-shaped groove 511 is connected to the bottom of the upper punch 510 .

[0027] In this embodiment, the variable mold assembly 700 includes a transverse plate 710, which is located in the cavity 521. A plurality of columns 720 are connected to the bottom of the transverse plate 710, and the columns 720 are all slidably inserted in the first vertical through hole 522; an adapter column 730 is rotatably connected to the transverse plate 710, and a positioning shaft 740 is inserted and fixed on the adapter column 730, and both ends of the positioning shaft 740 extend out of the lower punch 520 through the U-shaped groove 523; two cables 750 are fixedly connected to the top of the adapter column 730, and the other ends of the two cables 750 penetrate into the M-shaped groove 511, and are respectively passed through the two ends of the M-shaped groove 511 and fixedly connected to the bottom wall of the groove 525 of the lower punch 520; an electric telescopic cylinder 760 is fixed to the bottom of the upper punch 510, and the lower end of the electric telescopic cylinder 760 abuts against the groove 525 of the lower punch 520.

[0028] The U-shaped groove 523 is used to place the positioning shaft 740. When the positioning shaft 740 is at the upper part of the U-shaped groove 523, the column 720 does not extend. When the positioning shaft 740 is at the lower part of the U-shaped groove 523, the column 720 extends. It should be noted that there are multiple columns 720, and different shapes can be set as needed. At the same time, the number and position of the corresponding first vertical through holes 522 are set according to the position of the column 720; When the positioning shaft 740 is at the upper part of the U-shaped groove 523, the column 720 does not extend, and the cable 750 pulls the lower punch 520 to extend the electric telescopic cylinder 760, so that the lower end of the electric telescopic cylinder 760 abuts against the groove 525 of the lower punch 520, and the airbag 770 is not compressed, so that the original die head setting is installed and the first workpiece can be punched; The mold is changed to drive the electric telescopic cylinder 760 to shrink, and the positioning shaft 740 is rotated at the upper part of the U-shaped groove 523. After the positioning shaft 740 drives the transfer column 730 to rotate, the positioning shaft 740 moves down to the lower part of the U-shaped groove 523, and then rotates horizontally for positioning. At this time, the column 720 extends, and the cable 750 drives the other end to be pulled up along the M-shaped groove 511 as the cross plate 710 is pulled down, and the lower punch 520 moves up at the same time. At this time, the length of the column 720 extending is equal to the length of the lower punch 520 moving up. While changing the mold, the height of the two workpieces is consistent, which solves the problem that the mold needs to be disassembled for replacement or two sets of molds are set to achieve the stamping of the two workpieces in the prior art, and further ensures the height consistency of the two workpieces; when the change is completed, the electric telescopic cylinder 760 is extended, so that the lower end of the electric telescopic cylinder 760 abuts against the groove 525 of the lower punch 520, and the air bag 770 is not pressed, so that the second mold head setting of the installation change is realized, and the second workpiece can be stamped; In this embodiment, an airbag 770 is fixedly installed in the groove 525, and the top of the airbag 770 contacts the bottom of the upper punch 510; a pressure sensor 771 is installed on the airbag 770; and the pressure sensor 771 is electrically connected to a controller.

[0029] In this embodiment, the feeding assembly 800 includes a mounting plate 810 fixed to one end of the lower mold base 100, and the mounting plate 810 is arranged on both sides of the lower mold base 100. A feeding roller 820 is rotatably connected between the two mounting plates 810, and the two feeding rollers 820 are arranged in a vertical direction. The feeding roller 820 located on the lower side is located under the lower mold base 100, and the feeding roller 820 located on the upper side is located on the lower mold base 100. One end of the two feeding rollers 820 is fixed with a gear 830, and the two gears 830 are meshed with each other; a motor 840 is fixedly installed on the outer side of the mounting plate 810 on one side, and the output shaft of the motor 840 is fixedly connected to one end of a feeding roller 820, and the motor 840 is electrically connected to the controller.

[0030] Furthermore, when the cable 750 pulls the lower punch 520 upward, the airbag 770 is squeezed, and the pressure inside the airbag 770 increases. When the pressure increases, the pressure sensor 771 monitors the changes in pressure data and controls the motor 840 to run slowly through the controller. Because the material required to make the second workpiece is less than that of the original workpiece, the slow rotation of the motor 840 can shorten the feeding length of the feed roller 820, thereby reducing the generation of waste.

[0031] It should be noted that the controller is a PLC controller, in which the motor speed required for the length of the workpiece produced by the original mold and the deformed mold is set, and the corresponding mold motor rotation speed is selected according to the detection value of the pressure sensor to achieve the required length of the mold; motor 840 is a servo motor.

[0032] In this embodiment, a sliding bar 512 is provided on the lower end side wall of the upper punch 510, and a sliding groove 526 is provided on the inner wall of the lower punch 520 located at the groove 525. The upper punch 510 and the lower punch 520 are connected in a limited sliding manner through the sliding bar 512 and the sliding groove 526.

[0033] The arrangement of the sliding bar 512 and the sliding groove 526 limits the lateral rotation between the upper punch 510 and the lower punch 520 .

[0034] In this embodiment, the lower die base 100 is provided with threaded holes around it, screws 110 are threadedly connected to the threaded holes, and a positioning block 120 is fixed to the head of the screw 110 ; the upper die base 400 is provided with grooves adapted to the screw 110 and the positioning block 120 .

[0035] The arrangement of the screw 110 and the positioning block 120 facilitates pressing the raw material and has a guiding function for feeding the raw material, thereby improving the use stability of the mold and reducing the generation of defective products.

[0036] In this embodiment, a hole is opened at the bottom of the upper mold base 400, and the top of the guide column 300 is slidably connected to the hole of the upper mold base 400; a second spring 310 is sleeved on the guide column 300, and the bottom of the second spring 310 abuts against the upper surface of the die 200, and the top of the second spring 310 abuts against the lower surface of the upper mold base 400.

[0037] The second spring 310 can limit the distance between the upper die base 400 and the die 200, making it convenient to set the stamping stroke.

[0038] In this embodiment, a second stepped through hole 610 is provided on the fixing plate 600, a power output rod 620 is installed in the second stepped through hole 610, a mounting ring 630 is provided on the power output rod 620, a third spring 640 is provided between the bottom of the mounting ring 630 and the step of the second stepped through hole 610, the top of the third spring 640 abuts against the bottom of the mounting ring 630, and the bottom of the third spring 640 abuts against the step of the second stepped through hole 610.

[0039] It should be noted that the supporting force of the third spring 640 is greater than that of the second spring 310, so that when the power output shaft 620 is pressed down, the fixed plate 600 and the upper mold base 400 can be pressed down first, and then the punch 500 can be pressed down. After the punch 500 is pressed down, it fits into the concave hole of the die 200, thereby achieving a good mold stamping effect.

[0040] Example 2

[0041] A method for using a stamping die capable of quickly replacing a die head comprises the following steps: S1: Move the positioning shaft 740 to the top of the cavity, and use the upper end of the U-shaped groove 523 to position and fix it, then drive the electric telescopic cylinder 760 to extend, and the bottom of the electric telescopic cylinder 760 abuts against the bottom wall of the groove 525 of the lower punch 520. At this time, the column 720 is located inside the first vertical through hole 522, and then the raw material is passed through the two feeding rollers 820 to the die 200, and the raw material is pressed on the surface of the die 200 in the thickness direction through the positioning block 120 by adjusting the tightness of the screw 110; S2: Start the equipment and control the motor 840 to perform intermittent precise feeding. After the motor is started, the two feeding rollers 820 perform intermittent feeding according to the meshing of the gear 830, and the punching machine performs intermittent punching. After the feeding roller 820 feeds once, the punching machine drives the die head to perform a punching, and the cycle is repeated in sequence. During punching, the power output rod 620 of the equipment moves downward, driving the fixed plate 600 and the upper die seat 400 to move downward together. After the power output rod 620 moves downward and compresses the second spring 310 in place after the upper die seat 400 moves in place, the power output rod 620 continues to move downward, pressing the third spring 640, driving the punch 500 to extend downward along the first spring 530 into the punching groove of the die 200, completing the processing of the workpiece. Subsequently, the punch 500, the upper die seat 400 and the fixed plate 600 are reset to complete a punching, and the product is punched according to the original die head. When the die head needs to be replaced, stop the motor 840 to continue feeding, and stop the die head from punching; After the cam 750 is in the state of being moved upward, the bottom of the cam 750 is in the state of being moved upward, and the bottom of the cam 750 is in the state of being moved upward. S4: Further, in the process of the cable 750 driving the lower punch 520 to move upward, the airbag 770 is compressed, and the pressure sensor 771 on the airbag 770 transmits the detected data to the controller through the pressure change of the airbag 770 compression, and the controller controls the motor 840 to perform the next feeding mode to complete the replacement; S5: Start the motor and the machine tool to continue running, punching and changing the product behind the die head.

[0042] Although the present invention has been disclosed as above by embodiments, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A stamping die capable of quickly replacing a die head, comprising a lower die base (100) and an upper die base (400), characterized in that: A concave die (200) is fixed on the lower die base (100), a convex die (500) is installed on the upper die base (400), a guide column (300) is fixed on the lower die base (100), and the bottom of the upper die base (400) is slidably connected to the upper end of the guide column (300); the top of the upper die base (400) is connected to a fixed plate (600) via a fixed column; a feeding assembly (800) is also provided on one side of the lower die base (100), and the feeding assembly (800) is electrically connected to a controller; The punch (500) comprises an upper punch (510) and a lower punch (520), and a mold change assembly (700) is connected between the upper punch (510) and the lower punch (520); A first stepped through hole (410) is provided on the upper die seat (400); the upper punch (510) and the lower punch (520) are both slidably connected in the first stepped through hole (410); the upper punch (510) and the lower punch (520) are slidably connected; the upper punch (510) is inverted stepped shape; a first spring (530) is provided between the upper punch (510) and the stepped opening of the upper die seat (400); the top of the first spring (530) abuts against the stepped opening of the upper punch (510), and the bottom of the first spring (530) abuts against the stepped opening of the upper die seat (400).

2. A stamping die with a quickly replaceable die head according to claim 1, characterized in that: The lower punch (520) is provided with a cavity (521) therein, and a plurality of first vertical through holes (522) are also provided at the bottom of the lower punch (520), the cavity (521) is communicated with the plurality of first vertical through holes (522), the lower punch (520) located on both sides of the cavity (521) is provided with U-shaped grooves (523), both of the two U-shaped grooves (523) are communicated with the cavity (521), the lower punch (520) located at the upper end of the U-shaped groove (523) is also provided with a second vertical through hole (524), the second vertical through hole (524) is communicated with the cavity (521); the top of the lower punch (520) is also provided with a groove (525); The upper punch (510) is provided with an M-shaped groove (511), and the M-shaped groove (511) is connected to the bottom of the upper punch (510).

3. A stamping die with a quickly replaceable die head according to claim 2, characterized in that: The variable mold assembly (700) comprises a horizontal plate (710), the horizontal plate (710) is located in the cavity (521), a plurality of vertical columns (720) are connected to the bottom of the horizontal plate (710), and the vertical columns (720) are all slidably inserted in the first vertical through holes (522); a transfer column (730) is rotatably connected to the horizontal plate (710), and a positioning shaft (740) is inserted and fixed on the transfer column (730), and both ends of the positioning shaft (740) extend out through the U-shaped groove (523). The top of the adapter column (730) is fixedly connected to two cables (750), and the other ends of the two cables (750) are inserted into the M-shaped groove (511) and respectively pass out from both ends of the M-shaped groove (511) and are fixedly connected to the bottom wall of the groove (525) of the lower punch (520); the bottom of the upper punch (510) is fixedly provided with an electric telescopic cylinder (760), and the lower end of the electric telescopic cylinder (760) is abutted against the groove (525) of the lower punch (520).

4. A stamping die with a rapidly replaceable die head according to claim 2, characterized in that: An airbag (770) is fixedly installed in the groove (525), and the top of the airbag (770) contacts the bottom of the upper punch (510); a pressure sensor (771) is installed on the airbag (770); and the pressure sensor (771) is electrically connected to a controller.

5. A stamping die with a quickly replaceable die head according to claim 2, characterized in that: The feeding assembly (800) comprises a mounting plate (810) fixed to one end of the lower die base (100), the mounting plate (810) being arranged on both sides of the lower die base (100), a feeding roller (820) being rotatably connected between the two mounting plates (810), the two feeding rollers (820) being arranged in a vertical direction, the feeding roller (820) located on the lower side being located under the lower die base (100), the feeding roller (820) located on the upper side being located on the lower die base (100), one end of the two feeding rollers (820) being fixed with a gear (830), the two gears (830) being meshed with each other; a motor (840) being fixedly mounted on the outer side of the mounting plate (810) on one side, the output shaft of the motor (840) being fixedly connected to one end of a feeding roller (820), and the motor (840) being electrically connected to a controller.

6. A stamping die with a rapidly replaceable die head according to claim 2, characterized in that: A sliding bar (512) is provided on the side wall at the lower end of the upper punch (510), and a sliding groove (526) is provided on the inner wall of the lower punch (520) located at the groove (525). The upper punch (510) and the lower punch (520) are connected in a limited sliding manner via the sliding bar (512) and the sliding groove (526).

7. A stamping die with a rapidly replaceable die head according to claim 2, characterized in that: The lower die base (100) is provided with threaded holes around its periphery, screws (110) are threadedly connected to the threaded holes, and a positioning block (120) is fixed to the head of the screw (110); the upper die base (400) is provided with grooves adapted to the screws (110) and the positioning block (120).

8. The stamping die with a quick-change die head according to claim 1, characterized in that: A hole is formed at the bottom of the upper die seat (400), and the top of the guide column (300) is slidably connected to the hole of the upper die seat (400); a second spring (310) is sleeved on the guide column (300), the bottom of the second spring (310) abuts against the upper surface of the die (200), and the top of the second spring (310) abuts against the lower surface of the upper die seat (400).

9. A stamping die with a quickly replaceable die head according to claim 1, characterized in that: The fixing plate (600) is provided with a second stepped through hole (610), a power output rod (620) is installed in the second stepped through hole (610), a mounting ring (630) is provided on the power output rod (620), a third spring (640) is provided between the bottom of the mounting ring (630) and the step of the second stepped through hole (610), the top of the third spring (640) abuts against the bottom of the mounting ring (630), and the bottom of the third spring (640) abuts against the step of the second stepped through hole (610).

10. A method for using a stamping die capable of quickly replacing a die head according to any one of claims 1 to 9, characterized in that: The steps include: S1: Move the positioning shaft (740) to the top of the cavity and use the upper end of the U-shaped groove (523) to position and fix it. Then, drive the electric telescopic cylinder (760) to extend. The bottom of the electric telescopic cylinder (760) abuts against the bottom wall of the groove (525) of the lower punch (520). At this time, the column (720) is located inside the first vertical through hole (522). Then, the raw material is passed between the two feeding rollers (820) and inserted into the die (200). By adjusting the tightness of the screw (110), the raw material is pressed against the upper surface of the die (200) along the thickness direction through the positioning block (120); S2: Start the equipment and control the motor (840) to perform intermittent precise feeding. After the motor is started, the two feeding rollers (820) perform intermittent feeding according to the meshing of the gears (830), and the punching machine performs intermittent punching. After the feeding rollers (820) feed the material once, the punching machine drives the die head to perform a punching, and the cycle is repeated. During punching, the power output rod (620) of the equipment moves downward, driving the fixed plate (600) and the upper die seat (400) to move downward together. The power output rod (620) moves downward and compresses the upper die seat (400). After the second spring (310) is in place, the power output rod (620) continues to move downward, pressing the third spring (640), driving the punch (500) to extend downward along the first spring (530) into the stamping groove of the die (200), completing the processing of the workpiece. Subsequently, the punch (500), the upper die seat (400) and the fixing plate (600) are reset to complete a stamping, and the product is stamped according to the original die head. When the die head needs to be replaced, the motor (840) is stopped to continue feeding, and the die head is stopped for stamping. S3: First, the electric telescopic cylinder (760) is driven to retract, and the transfer column (730) is driven to rotate by rotating the positioning shaft (740). The positioning shaft (740) rotates from the top of the U-shaped groove (523) and moves downward to the bottom of the U-shaped groove (523). By horizontal rotation, it is clamped at the bottom of the U-shaped groove (523). At this time, the horizontal plate (710) drives the column (720) to move downward, and the bottom of the column (720) extends out of the bottom of the first vertical through hole (522). The bottom shape of the mold head is changed by the setting of multiple columns (720). At the same time, when the horizontal plate (710) moves downward, the cable (750) connected to the top of the transfer column (730) moves downward, and one end of the cable (750) moves downward, and the other ends of the two cables (750) move upward, so that the cable (750) drives the lower punch (520) to move upward, and the mold head is replaced. After the replacement, the electric telescopic cylinder (760) is driven to extend, and the bottom of the electric telescopic cylinder (760) abuts against the bottom wall of the groove (525) of the lower punch (520), so that the height of the product stamped by the mold is consistent with the original shape; S4: Further, in the process of the cable (750) driving the lower punch (520) to move upward, the airbag (770) is compressed, and the pressure sensor (771) on the airbag (770) transmits the detected data to the controller through the pressure change of the airbag (770) compression, and the controller controls the motor (840) to perform the next feeding mode, thereby completing the replacement; S5: Start the motor and the machine tool to continue running, punching and changing the product behind the die head.

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