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CN-121988662-A - Automobile lower guard board screw hole stamping device

CN121988662ACN 121988662 ACN121988662 ACN 121988662ACN-121988662-A

Abstract

The invention discloses a screw hole stamping device for an automobile lower guard plate, which comprises a sleeve rotationally connected to the inside of the bottom end of a column body, wherein a male die is in sliding connection with the sleeve, a plurality of brush plates are arranged on the inner wall of the sleeve, and the brush plates are abutted against the cylindrical surface of the male die. In the invention, a telescopic multi-stage copper pipe is integrated in the male die. One end of the multistage copper pipe is contacted with cooling liquid, heat generated during punching operation of the male die can be transferred to the cooling liquid, annealing softening caused by accumulation of heat in the male die is avoided, meanwhile, the male die retracts to drive the brush plate to rotate, lubricant is automatically and uniformly coated on the working surface of the brush plate, a heat dissipation mode which is coordinated with the inside and the outside of the multistage copper pipe is formed, lubrication preparation can be made for the next punching process in advance, and the problem that the cutting edge part is annealed and softened due to large abrasion, short service life and excessive accumulated heat during punching of the traditional male die is solved.

Inventors

  • Wei Lingjian

Assignees

  • 合肥召远汽车零部件有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (9)

  1. 1. The automobile lower guard plate screw hole stamping device comprises stamping equipment (1), an upper die (20) and a lower die (30), wherein a guard plate (8) is movably arranged on the lower die (30), and is characterized in that the upper die (20) is fixedly arranged at the output end of a hydraulic system of the stamping equipment (1), a lug corresponding to one surface shape of the guard plate (8) is fixedly arranged on the bottom surface of the upper die (20), the lower die (30) is fixedly arranged on an operation platform of the stamping equipment (1), and a groove corresponding to the other surface shape of the guard plate (8) is formed in the top surface of the lower die (30); The punching unit comprises a plurality of columns (21) and a plurality of convex dies (25), wherein the columns (21) are uniformly fixed in the bottom surface of the upper die (20), the convex dies (25) are connected in the columns (21) in a sliding manner, and the number of the convex dies (25) corresponds to that of the columns (21) one by one; The heat conduction unit comprises a multi-stage copper pipe (51) arranged in the male die (25), and the multi-stage copper pipe (51) can freely stretch out and draw back so as to realize stable heat conduction and heat dissipation effects of the male die (25) in the moving process; The oiling unit comprises a sleeve (60) rotationally connected to the inside of the bottom end of the column body (21), the male die (25) is in sliding connection with the sleeve (60), a plurality of brush plates (63) are rotationally connected to the inner wall of the sleeve (60), and the brush plates (63) are abutted against the cylindrical surface of the male die (25).
  2. 2. The automobile lower guard plate screw hole punching device according to claim 1, wherein the punching unit further comprises an inner cavity (22) formed in the cylinder (21), an air inlet channel (23) is connected to the top of the inner cavity (22), a sliding disc (24) is fixed to the top of the male die (25), the sliding disc (24) and the male die (25) are both slidably connected to the inner cavity (22), a first spring (26) is mounted at the bottom of the inner cavity (22), and the first spring (26) is sleeved outside the male die (25).
  3. 3. The automobile lower guard plate screw hole punching device according to claim 2, wherein the punching unit further comprises a lever (27) swinging inside the sliding disc (24), a first rotating shaft (28) is installed on the side face of the lever (27) in a penetrating mode, a first torsion spring (29) is sleeved on the first rotating shaft (28), the lever (27) is elastically connected inside the sliding disc (24) through the first torsion spring (29), a pressing block (291) is slidably connected inside the sliding disc (24) at the top end of the lever (27), the pressing block (291) protrudes out of the top surface of the sliding disc (24), and the bottom surface of the pressing block (291) abuts against the top end of the lever (27).
  4. 4. The device for stamping the screw holes of the lower guard plate of the automobile according to claim 3, wherein the top surface of the lower die (30) is uniformly provided with a plurality of through grooves (31), the top of each through groove (31) is a round opening with the diameter slightly larger than that of the male die (25), the inside of each through groove is a cylindrical channel with the larger diameter, the joint of each round opening and each cylindrical channel is of a conical structure, and a firing pin (32) is fixed in each through groove (31).
  5. 5. The automobile lower guard plate screw hole stamping device according to claim 2, wherein two exhaust channels (40) are symmetrically formed in the side portion of the cylinder (21), two ends of each exhaust channel (40) are respectively communicated with the inner cavity (22) and the outer portion of the upper die (20), a valve (42) is arranged in each exhaust channel (40), two oil supply pumps (43) are symmetrically arranged in the side portion of the cylinder (21), an oil cavity (44) is formed in the bottom of the cylinder (21), the sleeve (60) is located in the oil cavity (44), the oil supply pumps (43) are communicated with the oil cavity (44), two switches (41) are symmetrically arranged in the cylinder (21), and each switch (41) is respectively electrically connected with the corresponding valve (42) and the oil supply pump (43).
  6. 6. The device for stamping the screw hole of the lower guard plate of the automobile as claimed in claim 5, wherein the heat conducting unit further comprises a cooling cavity (50) formed in the top of the column body (21), a heat conducting disc (52) is fixed to the top of the multi-stage copper tube (51), and the heat conducting disc (52) is installed inside the cooling cavity (50).
  7. 7. The device for stamping the screw hole of the lower guard plate of the automobile according to claim 3, wherein the oiling unit further comprises a toothed ring (61) arranged at the top of the outer side of the sleeve (60) and a spring (62) arranged at the bottom of the outer side, the top of the brush plate (63) is rotatably connected with the inner side of the sleeve (60) through a second rotating shaft (64) which is rotatably arranged, a second torsion spring (65) is sleeved on the second rotating shaft (64), and the brush plate (63) is elastically connected with the sleeve (60) through the second torsion spring (65).
  8. 8. The automobile lower guard plate screw hole punching device according to claim 7, wherein two groups of transmission gears (66) and bevel gears (67) are arranged in the cylinder (21), the transmission gears (66) and the bevel gears (67) of each group are fixedly connected, the two groups of gear sets are meshed with each other through the bevel gears (67), one transmission gear (66) is meshed with the toothed ring (61), a rack (68) is further connected to the bottom of the cylinder (21) in a sliding mode, the rack (68) is meshed with the other transmission gear (66), the top of the rack (68) is inserted into the sliding disc (24), a hook groove (69) is formed in the top of the rack (68), and the bottom end of the lever (27) in the sliding disc (24) is clamped and connected with the hook groove (69).
  9. 9. The automobile lower guard plate screw hole stamping device according to claim 2, wherein a top block (70) and a second spring (71) are installed in the male die (25), the top block (70) is elastically connected to the interior of the male die (25) through the second spring (71), the top block (70) penetrates through the bottom of the male die (25), two push rods (72) are symmetrically fixed to two sides of the top block (70), the tops of the push rods (72) are in a wedge-shaped structure, two groups of telescopic rods (73) and third springs (74) are symmetrically installed in the sliding disc (24), the telescopic rods (73) are elastically connected to the interior of the sliding disc (24) through the third springs (74), and each push rod (72) is respectively abutted against one end of each telescopic rod (73).

Description

Automobile lower guard board screw hole stamping device Technical Field The invention relates to the technical field of automobile manufacturing, in particular to a screw hole punching device for an automobile lower guard plate. Background Along with the vigorous development of the automobile industry, the dual requirements of the weight reduction and the safety of the automobile body are increasingly remarkable, under the trend, a high-strength steel plate is a key material for manufacturing a structural part and a covering part of the automobile body due to the excellent specific strength, an automobile lower guard plate is taken as an important part for protecting a chassis key part, the high-strength steel plate is integrally formed through a stamping process, a plurality of screw holes for assembly and fixation are required to be precisely punched on the lower guard plate in the stamping process, and the process is usually completed by matching a special male die and a special female die in a progressive die synchronous with the forming of the lower guard plate body, so that the automobile lower guard plate has the characteristics of high efficiency, high precision and suitability for mass production. However, when the male die punches the high-strength steel plate, the severe technical challenge is faced, because the material strength is extremely high, the male die cutting edge needs to bear huge impact force and shearing stress at the moment of punching, and meanwhile, intense friction is generated with the section of the plate, a large amount of heat is instantaneously generated in the process, and the heat is highly concentrated in a tiny cutting edge working area, under the high-speed continuous production beat, the heat is continuously accumulated, the local temperature of the male die cutting edge is extremely easy to exceed the tempering temperature of the material of the male die cutting edge, so that the cutting edge is annealed and softened, once the hardness is reduced, the cutting edge can rapidly generate plastic deformation, the abrasion aggravation and even collapse, the size of a punched screw hole is ultra-poor, the burr is increased, the product is scrapped, the mold clamping stagnation and damage are further caused, the production line is forced to stop in an unplanned mode, the male die is frequently replaced, the maintenance cost of the mold is greatly increased, and the production efficiency and the stability are seriously influenced. Disclosure of Invention The invention aims to provide a device for punching screw holes of an automobile lower guard plate, which aims to solve the problems in the background art. The invention provides a screw hole stamping device for an automobile lower guard plate, which comprises stamping equipment 1, an upper die 20 and a lower die 30, wherein a guard plate 8 is movably arranged on the lower die 30, and is characterized in that the upper die 20 is fixedly arranged at the output end of a hydraulic system of the stamping equipment 1, a lug corresponding to one surface shape of the guard plate 8 is fixedly arranged on the bottom surface of the upper die 20, the lower die 30 is fixedly arranged on an operation platform of the stamping equipment 1, and a groove corresponding to the other surface shape of the guard plate 8 is formed in the top surface of the lower die 30; The punching unit comprises a plurality of cylinders 21 and a plurality of convex dies 25, wherein the cylinders 21 are uniformly fixed in the bottom surface of the upper die 20, the convex dies 25 are slidably connected in the cylinders 21, and the number of the convex dies 25 corresponds to that of the cylinders 21 one by one; The heat conduction unit comprises a multi-stage copper pipe 51 arranged in the male die 25, and the multi-stage copper pipe 51 can freely stretch out and draw back so as to realize stable heat conduction and heat dissipation effects of the male die 25 in the moving process; The oiling unit comprises a sleeve 60 rotatably connected to the inside of the bottom end of the cylinder 21, the male die 25 is slidably connected with the sleeve 60, a plurality of brush plates 63 are rotatably connected to the inner wall of the sleeve 60, and the brush plates 63 abut against the cylindrical surface of the male die 25. Preferably, the punching unit further comprises an inner cavity formed in the cylinder, an air inlet channel is connected to the top of the inner cavity, a sliding disc is fixed to the top of the male die, the sliding disc and the male die are both slidably connected to the inner cavity, a first spring is mounted at the bottom of the inner cavity, and the first spring is sleeved outside the male die. Preferably, the punching unit further comprises a lever swinging inside the sliding disc, a first rotating shaft is installed on the side face of the lever in a penetrating mode, a first torsion spring is sleeved on the first rotating shaft, the lever is el