A low-damage stamping device with a buffer mechanism

Abstract

The present invention provides a low-damage stamping device with a buffer mechanism in the field of stamping equipment. The buffer extrusion frame is arranged between the upper die and the lower die and is buffered by a negative pressure spring, so as to achieve buffering of the upper die moving downward, avoid rigid collision between the upper die and the lower die, and avoid collision damage to the upper die or the lower die; at the same time, before the upper die contacts the steel plate, the buffer extrusion frame extrudes the steel plate step by step to squeeze and fix the steel plate, so that the steel plate is guaranteed to be stable and reduce deviation during stamping, thereby improving the stamping stability and stamping quality; through the driving rack plate arranged on the upper die seat and the ratchet gear meshing therewith, the synchronous rotation mechanism is linked with the stamping cylinder, and after the stamping is completed, the material is loaded and the waste material is rolled up, so that the loading and unloading and stamping are carried out at intervals, and there is no need to set up an additional control mechanism for control, thereby simplifying the control structure.

Description

Technical Field

[0001] The invention relates to the field of stamping equipment, in particular to a low-damage stamping device with a buffer mechanism. Background Art

[0002] A stamping machine is a stamping press. Stamping production is mainly for sheet metal. Through the mold, it can make blanking, punching, forming, drawing, trimming, fine blanking, shaping, riveting and extrusion, etc., and is widely used in various fields; the design principle of the punching machine is to convert circular motion into linear motion. The main motor outputs power to drive the flywheel, and the clutch drives the gears, crankshaft (or eccentric gear), connecting rod, etc. to achieve the linear motion of the slider. The movement from the main motor to the connecting rod is circular motion.

[0003] When a traditional stamping machine is performing stamping, the upper die seat drives the upper die to move downward and cooperate with the fixed lower die to stamp the plate. During the process, the upper die and the lower die are prone to rigid collision, causing the upper die and the lower die to be easily damaged. At the same time, during the stamping process, the steel plate is prone to shift under the action of pressure, causing damage to the stamped product.

[0004] The present application provides a low-damage stamping device with a buffer mechanism, which buffers the upper die through the buffer mechanism and simultaneously squeezes and fixes the steel plate to reduce the deviation of the steel plate. Summary of the invention

[0005] The purpose of the present application is to solve the problem that the traditional stamping machine lacks a buffer mechanism, which easily causes damage to the die and displacement of the steel plate; compared with the prior art, a low-damage stamping device with a buffer mechanism is provided, which can buffer the upper die and extrude and fix the steel plate at the same time.

[0006] A low-damage stamping device with a buffer mechanism comprises a stamping table and a buffer mechanism, wherein a lower die seat is fixedly connected to the stamping table, a lower die is nested in the lower die seat, an upper die is arranged above the lower die, an upper die seat is fixedly connected above the upper die, and a stamping oil cylinder is fixedly connected to the upper die seat; the stamping oil cylinder is fixedly connected to a mounting top plate, guide columns distributed at four corners are fixedly connected below the mounting top plate, and the lower ends of the guide columns are fixedly connected to the stamping table; the buffer mechanism comprises a buffer extrusion frame arranged between the upper die seat and the lower die seat, a through groove for the upper die to pass through is provided on the buffer extrusion frame, a group of symmetrically arranged piston rods are fixedly connected to the upper end of the buffer extrusion frame, the piston rods extend to the top of the upper die seat and are sleeved with a buffer cylinder, a buffer spring abutting against the upper end of the piston rod is nested in the buffer cylinder, a group of symmetrically arranged buffer cylinders are connected through a connecting pipe, and the buffer cylinders are filled with inert gas.

[0007] Furthermore, it also includes a steel plate feeding mechanism, which includes a release drum and a winding drum symmetrically arranged on both sides of the stamping table, one end of the steel plate is wound and connected to the release drum and the other end is wound and connected to the winding drum, and the release drum and the winding drum are connected with a synchronous rotation mechanism; the stamping table is provided with a discharge cover below the lower mold.

[0008] Furthermore, the synchronous rotation mechanism includes a horizontal transmission shaft installed on the rear side of the release drum and the winding drum. The roller shafts of the release drum and the winding drum are connected to the horizontal transmission shaft through a first transmission gear group with the same structure. The horizontal transmission shaft is connected to the vertical transmission shaft through a second transmission gear group. The vertical transmission shaft is connected to the transverse transmission shaft through a third transmission gear group. The end of the transverse transmission shaft is fixedly connected to a ratchet gear, and the ratchet gear is meshed with a driving rack plate fixedly connected to the upper mold base.

[0009] Preferably, the upper die seat is provided with a sliding hole for the guide column to pass through, the inner wall of the sliding hole abuts and slides with the outer wall of the guide column, and the four corners of the buffer extrusion frame are provided with arc grooves abutting and sliding with the guide column.

[0010] Preferably, a limiting ring abutting against the upper end of the buffer spring is provided in the buffer cylinder.

[0011] Preferably, a mounting frame is fixedly connected below the punching table, and the release drum and the winding drum are rotatably connected to the mounting frame via roller shafts. A passing groove for the steel plate to pass through is provided on the punching table, and a guide roller is provided in the passing groove.

[0012] Preferably, the horizontal transmission shaft is rotatably connected to a mounting plate fixedly connected to the mounting frame, and the first transmission gear set includes a first bevel gear and a second bevel gear that are vertically arranged and meshed with each other.

[0013] Preferably, the vertical transmission shaft passes through the stamping table and is rotationally connected to the stamping table, and the second transmission gear set includes a third bevel gear fixedly connected to the lower end of the vertical transmission shaft and a fourth bevel gear sleeved and fixed to the horizontal transmission shaft.

[0014] Preferably, the transverse transmission shaft is rotatably connected to a mounting plate fixedly connected to the stamping table, the third transmission gear group includes a fifth bevel gear fixedly connected to the upper end of the vertical transmission shaft and a sixth bevel gear fixedly connected to the transverse transmission shaft, the driving rack plate is a vertically arranged rack plate, and the outer side of the driving rack plate is slidably connected to a guide groove plate fixedly connected to the stamping table.

[0015] Preferably, the ratchet gear includes a rotating disk fixedly connected to the transverse transmission shaft, a pawl hinged on the rotating disk, and a gear ring sleeved on the outside of the rotating disk and engaged with the pawl, and the inner wall of the gear ring is provided with pawl grooves that cooperate with the pawl and are distributed in a circumference.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The present invention achieves buffering of the upper die moving downward by means of a buffer extrusion frame which is arranged between the upper die and the lower die and is buffered by a negative pressure spring, thereby avoiding a rigid collision between the upper die and the lower die, and avoiding collision damage to the upper die or the lower die; at the same time, before the upper die contacts the steel plate, the buffer extrusion frame extrudes the steel plate step by step to squeeze and fix the steel plate, thereby ensuring stability of the steel plate during stamping and reducing deviation, thereby improving stamping stability and stamping quality.

[0018] (2) The present invention is provided with a group of buffer cylinders symmetrically arranged on the upper die seat and interconnected by a connecting pipe. When the buffer springs are squeezed by the piston rod, the inert gas in the buffer cylinders flows freely in the two groups of buffer cylinders through the connecting pipe, so that the compression amounts of the buffer springs in the two groups of buffer cylinders are the same, so that the pressures of the two groups of piston rods on the buffer extrusion frame are the same, and the extrusion force applied by the buffer extrusion frame to various positions of the steel plate is more balanced, thereby improving the extrusion fixing effect.

[0019] (3) The present invention realizes the loading of new steel plates and the unloading and winding of waste steel plates during the stamping gap by symmetrically arranged release drums and winding drums and a synchronous rotating mechanism, thereby facilitating continuous production and improving the overall stamping production efficiency.

[0020] (4) The present invention uses a driving rack plate disposed on the upper die base and a ratchet gear meshing therewith to enable the synchronous rotation mechanism to be linked with the stamping cylinder. After the stamping is completed, the material is loaded and the waste material is rolled up, thereby realizing the interval between loading and unloading and stamping. There is no need to set up an additional control mechanism for control, thereby simplifying the control structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention from the front side perspective;

[0022] Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0023] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention from a rear side perspective;

[0025] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0026] Figure 6 It is a longitudinal cross-sectional structural schematic diagram of the present invention;

[0027] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 8 It is a schematic diagram of the assembly structure of the upper die base and the buffer extrusion frame in the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of the buffer extrusion frame in the present invention;

[0030] Fig.10 It is a schematic diagram of the assembly structure of the lower die and the lower die base in the present invention.

[0031] Explanation of the numbers in the figure: 1, stamping table; 2, lower die seat; 3, lower die; 4, upper die seat; 401, sliding hole; 5, upper die; 6, stamping cylinder; 7, mounting top plate; 8, guide column; 9, buffer extrusion frame; 901, through groove; 902, arc groove; 10, piston rod; 11, buffer cylinder; 1101, limit ring; 12, buffer spring; 13, connecting pipe; 14, steel plate; 15, release cylinder; 16, collection Reel; 17, guide roller; 18, first transmission gear set; 19, horizontal transmission shaft; 20, second transmission gear set; 21, vertical transmission shaft; 22, third transmission gear set; 23, transverse transmission shaft; 24, ratchet gear; 2401, gear ring; 2402, ratchet; 2403, rotating disk; 25, driving rack plate; 26, guide groove plate; 27, discharge cover; 28, mounting frame; 29, mounting plate. DETAILED DESCRIPTION

[0032] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present application.

[0033] Embodiment 1:

[0034] The present invention provides a low-damage punching device with a buffer mechanism, see Figure 1-3, including a stamping table 1 and a buffer mechanism, the stamping table 1 is fixedly connected with a lower die base 2, a lower die 3 is nested in the lower die base 2, an upper die 5 is arranged above the lower die 3, an upper die base 4 is fixedly connected above the upper die 5, and a stamping cylinder 6 is fixedly connected to the stamping cylinder 6; the stamping cylinder 6 is fixedly connected with a mounting top plate 7, and guide columns 8 distributed in four corners are fixedly connected below the mounting top plate 7, and the lower end of the guide column 8 is fixedly connected to the stamping table 1; the buffer mechanism includes a buffer extrusion frame 9 arranged between the upper die base 4 and the lower die base 2, the buffer extrusion frame 9 is provided with a through groove 901 for the upper die 5 to pass through, a group of symmetrically arranged piston rods 10 are fixedly connected to the upper end of the buffer extrusion frame 9, the piston rod 10 extends to the top of the upper die base 4 and is sleeved with a buffer cylinder 11, a buffer spring 12 abutting against the upper end of the piston rod 10 is nested in the buffer cylinder 11, a group of symmetrically arranged buffer cylinders 11 are connected through a connecting pipe 13, and the buffer cylinder 11 is filled with inert gas.

[0035] Specifically, during the stamping operation, the steel plate 14 to be processed is placed on the lower die 3, and the stamping oil cylinder 6 is started. The stamping oil cylinder 6 drives the upper die seat 4 to move downward, and the upper die seat 4 drives the buffer extrusion frame 9 to move downward. The buffer extrusion frame 9 first contacts the steel plate 14. As the upper die seat 4 continues to move downward, the buffer spring 12 is compressed, and the extrusion force of the buffer extrusion frame 9 on the steel plate 14 gradually increases. Before the upper die 5 contacts the steel plate 14, the buffer extrusion frame 9 squeezes and fixes the steel plate 14 with a gradually increasing extrusion force, so that the steel plate 14 can be kept in a stable state during subsequent stamping. It is stable and will not shift due to force, ensuring the stamping position and stamping quality. At the same time, the buffer spring 12 buffers the upper die seat 4 and the upper die 5 thereon to avoid rigid collision between the upper die 5 and the lower die 3, which may cause damage. In addition, when the piston rod 10 moves in the buffer cylinder 11, the inert gas filled therein is compressed, so that the pressure in the two symmetrically arranged groups of buffer cylinders 11 is equal, so that the pressure applied by the two symmetrically arranged groups of piston rods 10 to the buffer extrusion frame 9 is equal, further ensuring the uniform extrusion and fixing effect on both sides of the steel plate 14 and ensuring the stamping quality.

[0036] See also Figure 1 and Figure 9-10 In this embodiment, the upper die base 4 is provided with a sliding hole 401 for the guide column 8 to pass through, and the inner wall of the sliding hole 401 abuts against the outer wall of the guide column 8 for sliding.

[0037] Specifically, the stability of the upper die base 4 and the upper die 5 thereunder during the lifting and lowering movement is improved, thereby improving the stability during stamping.

[0038] See also Figure 1 and Figure 9-10 In this embodiment, the four corners of the buffer extrusion frame 9 are provided with arc grooves 902 that abut and slide against the guide column 8.

[0039] Specifically, the stability of the buffer extrusion frame 9 when it moves up and down is improved, and the extrusion and fixing effect of the buffer extrusion frame 9 on the steel plate 14 is improved.

[0040] See also Figure 3 In this embodiment, a limiting ring 1101 is provided in the buffer cylinder 11 and abuts against the upper end of the buffer spring 12 .

[0041] Specifically, when the piston rod 10 squeezes the inert gas in the buffer cylinder 11 , the inert gas provides reverse resistance to the piston rod 10 , thereby preventing the piston rod 10 from excessively squeezing the buffer spring 12 and causing it to lose its elasticity.

[0042] Embodiment 2:

[0043] See also Figure 3-10 The difference between this embodiment and embodiment 1 is that the low-damage stamping device with a buffer mechanism also includes a steel plate feeding mechanism, the steel plate feeding mechanism includes a release cylinder 15 and a winding cylinder 16 symmetrically arranged on both sides of the stamping table 1, one end of the steel plate 14 is wound and connected to the release cylinder 15 and the other end is wound and connected to the winding cylinder 16, the release cylinder 15 and the winding cylinder 16 are connected with a synchronous rotation mechanism; the stamping table 1 is provided with a discharge cover 27 below the lower mold 3.

[0044] Specifically, after the stamping is completed, the finished product is discharged from the discharge cover 27, and then the synchronous rotation mechanism is started. The synchronous rotation mechanism drives the steel plate 14 to be wound, and the waste material is wound while the new steel plate 14 is moved to the lower mold 3, so as to realize rapid loading and unloading, facilitate continuous production, and improve overall operation efficiency.

[0045] See also Figure 4-7 In this embodiment, the synchronous rotation mechanism includes a horizontal transmission shaft 19 installed on the rear side of the release cylinder 15 and the winding cylinder 16. The roller shafts of the release cylinder 15 and the winding cylinder 16 are connected to the horizontal transmission shaft 19 through a first transmission gear set 18 with the same structure. The horizontal transmission shaft 19 is connected to a vertical transmission shaft 21 through a second transmission gear set 20. The vertical transmission shaft 21 is connected to a transverse transmission shaft 23 through a third transmission gear set 22. A ratchet gear 24 is fixedly connected to the end of the transverse transmission shaft 23, and the ratchet gear 24 is meshed with a driving rack plate 25 fixedly connected to the upper mold base 4.

[0046] Specifically, after the stamping is completed, when the stamping cylinder 6 drives the buffer extrusion frame 9 to completely separate from the steel plate 14, the stamping cylinder 6 drives the upper die seat 4 to continue to move upward. At this time, the driving rack plate 25 contacts the ratchet gear 24 to drive the ratchet gear 24 to rotate. The ratchet gear 24 drives the release drum 15 and the winding drum 16 to rotate in the same direction through the transverse transmission shaft 23, the vertical transmission shaft 21 and the horizontal transmission shaft 19, thereby realizing feeding and waste collection.

[0047] See also Figure 2 In this embodiment, a mounting frame 28 is fixedly connected below the punching table 1, and the release drum 15 and the winding drum 16 are rotatably connected to the mounting frame 28 through a roller shaft. A passing groove for the steel plate 14 to pass through is opened on the punching table 1, and a guide roller 17 is provided in the passing groove.

[0048] Specifically, it is convenient to fix the release drum 15 and the winding drum 16 .

[0049] See also Figure 4 In this embodiment, the horizontal transmission shaft 19 is rotatably connected to a mounting plate 29 fixedly connected to a mounting frame 28, and the first transmission gear set 18 includes a first bevel gear and a second bevel gear vertically arranged and meshing with each other.

[0050] Specifically, it is convenient to realize the connection transmission between the horizontal transmission shaft 19 and the release drum 15 and the winding drum 16.

[0051] See also Figure 4-7 In this embodiment, the vertical transmission shaft 21 passes through the stamping table 1 and is rotatably connected to the stamping table 1. The second transmission gear set 20 includes a third bevel gear fixedly connected to the lower end of the vertical transmission shaft 21 and a fourth bevel gear fixedly sleeved with the horizontal transmission shaft 19.

[0052] Specifically, the fixing and transmission of the vertical transmission shaft 21 are achieved.

[0053] See also Figure 4-7 In this embodiment, the transverse transmission shaft 23 is rotatably connected to a mounting plate 29 fixedly connected to the stamping table 1 , and the third transmission gear set 22 includes a fifth bevel gear fixedly connected to the upper end of the vertical transmission shaft 21 and a sixth bevel gear fixedly connected to the transverse transmission shaft 23 .

[0054] Specifically, the fixation and transmission of the transverse transmission shaft 23 are achieved.

[0055] See also Figure 7 and Figure 8 In this embodiment, the driving rack plate 25 is a vertically arranged rack plate, and a guide groove plate 26 fixedly connected to the punching table 1 is slidably connected to the outer side of the driving rack plate 25 .

[0056] Specifically, the stability of driving the rack plate 25 to move up and down is improved.

[0057] See also Figure 7 In this embodiment, the ratchet gear 24 includes a rotating disk 2403 fixedly connected to the transverse transmission shaft 23, a pawl 2402 hinged on the rotating disk 2403, and a gear ring 2401 sleeved on the outer side of the rotating disk 2403 and engaged with the pawl 2402. The inner wall of the gear ring 2401 is provided with a pawl groove that cooperates with the pawl 2402 and is distributed in a circle.

[0058] Specifically, the ratchet gear 24 is rotated in one direction, and only when the rack plate 25 is driven to move upward, the ratchet gear 24 is driven to rotate, so as to load the steel plate 14 and wind the waste.

[0059] The above description is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto.

Claims

1. A low-damage stamping device with a buffer mechanism, comprising a stamping table (1) and a buffer mechanism, wherein a lower die seat (2) is fixedly connected to the stamping table (1), a lower die (3) is nested in the lower die seat (2), an upper die (5) is arranged above the lower die (3), an upper die seat (4) is fixedly connected above the upper die (5), and a stamping cylinder (6) is fixedly connected to the upper die seat (4); the stamping cylinder (6) is fixedly connected to a mounting top plate (7), and guide columns (8) distributed at four corners are fixedly connected below the mounting top plate (7), and the lower ends of the guide columns (8) are fixedly connected to the stamping table (1); characterized in that, The buffer mechanism comprises a buffer extrusion frame (9) arranged between an upper die seat (4) and a lower die seat (2); a through groove (901) for the upper die (5) to pass through is provided on the buffer extrusion frame (9); a group of symmetrically arranged piston rods (10) are fixedly connected to the upper end of the buffer extrusion frame (9); the piston rods (10) extend to the upper part of the upper die seat (4) and are sleeved with a buffer cylinder (11); a buffer spring (12) abutting against the upper end of the piston rod (10) is nested in the buffer cylinder (11); the group of symmetrically arranged buffer cylinders (11) are connected to each other through a connecting pipe (13); and the buffer cylinder (11) is filled with inert gas; The machine also includes a steel plate feeding mechanism, which includes a release cylinder (15) and a winding cylinder (16) symmetrically arranged on both sides of the punching platform (1), one end of the steel plate (14) is wound and connected to the release cylinder (15) and the other end is wound and connected to the winding cylinder (16), and the release cylinder (15) and the winding cylinder (16) are connected to a synchronous rotation mechanism; the punching platform (1) is provided with a discharge cover (27) below the lower mold (3); the synchronous rotation mechanism includes a horizontal transmission shaft (19) installed at the rear of the release cylinder (15) and the winding cylinder (16), and the release cylinder (15) and the winding cylinder (16) are connected to the release cylinder (15) and the winding cylinder (16). The roller shafts of the unwinding drum (15) and the winding drum (16) are connected to the horizontal transmission shaft (19) through a first transmission gear set (18) of the same structure, the horizontal transmission shaft (19) is connected to the vertical transmission shaft (21) through a second transmission gear set (20), the vertical transmission shaft (21) is connected to the transverse transmission shaft (23) through a third transmission gear set (22), the end of the transverse transmission shaft (23) is fixedly connected to a ratchet gear (24), and the ratchet gear (24) is meshed with a driving rack plate (25) fixedly connected to the upper die seat (4).

2. A low-damage punching device with a buffer mechanism according to claim 1, characterized in that: The upper die seat (4) is provided with a sliding hole (401) for the guide column (8) to pass through, the inner wall of the sliding hole (401) abuts and slides with the outer wall of the guide column (8), and the four corners of the buffer extrusion frame (9) are provided with arc grooves (902) abutting and sliding with the guide column (8).

3. A low-damage punching device with a buffer mechanism according to claim 1, characterized in that: A limiting ring (1101) is provided in the buffer cylinder (11) and abuts against the upper end of the buffer spring (12).

4. A low-damage punching device with a buffer mechanism according to claim 1, characterized in that: A mounting frame (28) is fixedly connected below the punching platform (1), and the release drum (15) and the winding drum (16) are both rotatably connected to the mounting frame (28) via roller shafts. A passing groove for the steel plate (14) to pass through is provided on the punching platform (1), and a guide roller (17) is provided in the passing groove.

5. A low-damage punching device with a buffer mechanism according to claim 4, characterized in that: The horizontal transmission shaft (19) is rotatably connected to a mounting plate (29) fixedly connected to a mounting frame (28), and the first transmission gear set (18) comprises a first bevel gear and a second bevel gear which are vertically arranged and mesh with each other.

6. A low-damage punching device with a buffer mechanism according to claim 4, characterized in that: The vertical transmission shaft (21) passes through the punching table (1) and is rotationally connected to the punching table (1). The second transmission gear set (20) comprises a third bevel gear fixedly connected to the lower end of the vertical transmission shaft (21) and a fourth bevel gear sleeved and fixed to the horizontal transmission shaft (19).

7. A low-damage punching device with a buffer mechanism according to claim 6, characterized in that: The transverse transmission shaft (23) is rotatably connected to a mounting plate (29) fixedly connected to the punching table (1); the third transmission gear set (22) comprises a fifth bevel gear fixedly connected to the upper end of the vertical transmission shaft (21) and a sixth bevel gear fixedly connected to the transverse transmission shaft (23); the driving rack plate (25) is a vertically arranged rack plate; the outer side of the driving rack plate (25) is slidably connected to a guide groove plate (26) fixedly connected to the punching table (1).

8. A low-damage punching device with a buffer mechanism according to claim 1, characterized in that: The ratchet gear (24) comprises a rotating disk (2403) fixedly connected to the transverse transmission shaft (23), a ratchet pawl (2402) hinged on the rotating disk (2403), and a gear ring (2401) sleeved on the outer side of the rotating disk (2403) and engaged with the ratchet pawl (2402); the inner wall of the gear ring (2401) is provided with ratchet pawl grooves matched with the ratchet pawl (2402) and distributed in a circumference.

Images