CN-224208934-U - Progressive die structure for upward punching

CN224208934UCN 224208934 UCN224208934 UCN 224208934UCN-224208934-U

Abstract

The utility model discloses a progressive die structure for punching upwards, which belongs to the technical field of machining and comprises a lower die, an upper die holder, a stripper plate and a punch assembly, and is characterized in that: the punch assembly is arranged on the lower die, the punch assembly is provided with a punch which is used for punching a conical groove of a workpiece from bottom to top, the stripper plate is provided with a vertical unloading hole corresponding to the punch and a horizontal discharging hole communicated with the vertical unloading hole, and the horizontal discharging hole penetrates through the stripper plate and one end part of the horizontal discharging hole is connected with the air blowing device. The structure remarkably improves the structural strength of the female die by adopting a mode of punching holes from bottom to top in the progressive die, avoids the problem of thin wall failure caused by fitting of the special-shaped surface, simplifies the die processing technology, combines an effective waste discharging design, and ensures the stability and durability of the die in high-speed continuous stamping.

Inventors

ZHU ZHIQIANG
ZHENG CHUNYUAN
BAI GUANGJIANG
ZHANG ZHANPENG
Shang Ruilong

Assignees

天津市津兆机电开发有限公司

Dates

Publication Date: 20260508
Application Date: 20250423

Claims (4)

1. The progressive die structure for punching upwards comprises a lower die, an upper die base, a stripper plate and a punch head assembly, and is characterized in that the punch head assembly is arranged on the lower die and is provided with a punch head for punching a conical groove of a workpiece from bottom to top, the stripper plate is provided with a vertical unloading hole corresponding to the punch head and a transverse discharging hole communicated with the vertical unloading hole, and the transverse discharging hole penetrates through the stripper plate and one end part of the transverse discharging hole is connected with a blast device.
2. The progressive die structure for upward punching of claim 1, wherein the lower die and the upper die form a progressive die set, the progressive die set has a punching station and a punching station located behind the punching station, the upper die forms a workpiece by moving from top to bottom at the punching station, and the lower die of the punching station is provided with a lower forming part for forming the conical groove below the workpiece.
3. The progressive die structure for upward punching of claim 2, wherein the side portion of the stripper plate is detachably provided with a pipe joint seat, the pipe joint seat is provided with an air inlet pipe, the inner side of the air inlet pipe is communicated with the discharge transverse hole, and the outer side of the air inlet pipe is provided with a pipe joint for connecting a blower device.
4. The progressive die structure for upward punching of claim 3, wherein the diameter of the vertical discharge hole is larger than the diameter of the punch, and the upper end of the punch protrudes into the vertical discharge hole to a greater height than the upper end of the vertical discharge hole in a state in which the punch is clamped and ejected.

Description

Progressive die structure for upward punching Technical Field The utility model belongs to the technical field of machining, and particularly relates to a progressive die structure for upward punching. Background Punching is a common process in a stamping die, and can be an indispensable important procedure in a progressive die, the punching direction is required to be consistent with the punching direction of a punch press under the normal condition, waste materials are discharged from the lower part of the die after punching, in the progressive die production process, the timely discharge of the waste materials is particularly important because the punch press is required to be continuously and efficiently produced, but the requirement of part strength can not be met in a single punching direction sometimes because the shape characteristics and the using functions of different products are different, and the separate punching die is required to be added to realize the punching in different directions. Taking fig. 1, 2 and 3 as an example, the product 1 is required to be fixed in the stamping direction from top to bottom on the whole structure so as to ensure the molding size and the precision requirement of the subsequent process. Under the constraint of the structure, the lower area of a certain punching position is a conical inclined plane, and if a traditional punching mode from top to bottom consistent with the whole punching direction is adopted, the corresponding lower die insert 2 needs to be attached to the conical surface for forming. Because the local inclination angle of the conical surface is larger, the side wall of the lower die concave die insert at the punching position can be cut very thin in a local area, so that the structural strength of the lower die concave die insert is obviously insufficient, cracking, deformation or early failure can be easily generated in the punching process, and the requirements of the service life of a die and the mass production of products can not be met. In addition, as the profile of the female die is required to be attached to the conical surface for forming, the processing and manufacturing difficulties are high, the control difficulty of the fit clearance is increased, and the problem of vulnerability of the female die insert is further aggravated. Disclosure of utility model Aiming at the problems that the side wall of a female die insert is too thin and the structural strength is insufficient due to the fact that a conical surface is arranged below a punching position of a product in the existing downward punching forming progressive die, the service life of the die is influenced, and continuous and stable punching is realized, the utility model provides an upward punching progressive die structure. The utility model discloses an upward punching progressive die structure, which comprises a lower die, an upper die holder, a stripper plate and a punch assembly, and is characterized in that the punch assembly is arranged on the lower die and is provided with a punch which moves from bottom to top to punch a conical groove of a workpiece, the stripper plate is provided with a vertical discharging hole corresponding to the punch and a horizontal discharging hole communicated with the vertical discharging hole, and the horizontal discharging hole penetrates through the stripper plate and one end part of the horizontal discharging hole is connected with a blast device. In the above technical scheme, preferably, the lower die and the upper die form a progressive die set, the progressive die set has a punching station and a punching station located behind the punching station, the upper die is used for punching and forming the workpiece by moving from top to bottom at the punching station, and the lower die of the punching station is provided with a lower forming part for forming the conical groove below the workpiece. In the above technical scheme, preferably, the lateral part of the stripper plate is detachably provided with a pipe joint seat, the pipe joint seat is provided with an air inlet pipeline, the inner side of the air inlet pipeline is communicated with the discharge transverse hole, and the outer side of the air inlet pipeline is provided with a pipe joint for connecting a blower device. In the above technical solution, preferably, the diameter of the unloading vertical hole is larger than the diameter of the punch, and in a state of die assembly and ejection of the punch, the upper end of the punch extends into a height larger than the upper end of the unloading vertical hole. The mode that punches a hole from bottom to top in progressive die is adopted to this design, and the direction of punching a hole is opposite with the punching direction promptly. The punch is arranged in the lower die and the punching operation is finished from bottom to top, so that the die part corresponding to the punching position can adopt a planar structure or a loc