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CN-224222458-U - Horizontal trimming die for small-diameter parts

CN224222458UCN 224222458 UCN224222458 UCN 224222458UCN-224222458-U

Abstract

The utility model discloses a small-diameter part horizontal trimming die which comprises an upper die holder and a lower die holder, wherein an intermediate positioning column is arranged on the lower die holder and is used for supporting a part, a sliding seat is arranged on the outer side of the intermediate positioning column, a sliding block is in sliding fit with the sliding seat, a side punching punch is arranged at one end of the sliding block, which is close to the intermediate positioning column, and is matched with the bottom surface of the part, a driving punch is arranged on the upper die holder and is in sliding fit with the sliding block, so that when the die is closed, the upper die holder drives the driving punch to move towards the sliding block and drives the sliding block to horizontally slide on the sliding seat and drive the side punching punch to horizontally move from a position close to the intermediate positioning column to a position far away from the intermediate positioning column to trim the part.

Inventors

  • YANG HONGSHENG
  • PANG HAOWEI
  • PENG GENWANG
  • CAO BING

Assignees

  • 易纳纬(上海)智能科技有限公司

Dates

Publication Date
20260512
Application Date
20250516

Claims (8)

  1. 1. The small-diameter part horizontal trimming die is characterized by comprising an upper die holder (1) and a lower die holder (2), wherein an intermediate positioning column (3) is arranged on the lower die holder (2), the intermediate positioning column (3) is used for supporting the position of a part (8), a sliding seat (4) is arranged on the outer side of the intermediate positioning column (3), a sliding block (5) is slidingly matched on the sliding seat (4), a side punching head (6) is arranged at one end, close to the intermediate positioning column (3), of the sliding block (5), the side punching head (6) is matched with the bottom surface of the part (8), a driving punch (11) is arranged on the upper die holder (1), and the driving punch (11) is slidingly matched with the sliding block (5), so that the upper die holder (1) drives the driving punch (11) to move towards the sliding block (5) and horizontally slide on the sliding seat (4) through the driving punch (11) to horizontally move from the position, close to the intermediate positioning column (3), away from the position of the intermediate positioning column (3), and trimming the part (8).
  2. 2. The small-diameter part horizontal trimming die as set forth in claim 1, wherein the die holder (2) is provided with a die (7), the die (7) is arranged on the outer side of the middle positioning column (3), the die (7) is provided with a concave surface (71) around the outer edge of the part (8), and the concave surface (71) provides lateral supporting strength for the part (8).
  3. 3. A small diameter part horizontal trimming die as set forth in claim 2, wherein the middle positioning column (3) is provided with a punch groove (31), and one end of the side punch (6) close to the middle positioning column (3) is positioned in the punch groove (31) when the die is opened, so that trimming of the bottom surface of the part (8) is facilitated when die assembly is performed.
  4. 4. A small-diameter part horizontal trimming die as claimed in claim 3 is characterized in that a fixing plate (21) is arranged on the lower die holder (2), a return spring (22) is arranged between the fixing plate (21) and the sliding block (5), and the return spring (22) provides pressure for the sliding block (5) when the die is opened so as to ensure that one end of a side punching head (6) is positioned in a punching head groove (31) of the middle positioning column (3) when the sliding block (5) is not subjected to external force.
  5. 5. The small-diameter part horizontal trimming die set of claim 1 is characterized in that an upper fixing sleeve (12) is arranged on the upper die holder (1), a yielding hole is formed in the upper fixing sleeve (12), and the upper fixing sleeve (12) penetrates through the top end of the part (8) through the yielding hole and abuts against the part (8) on the middle positioning column (3) when the die is assembled, so that the position of the part (8) on the positioning column is stabilized.
  6. 6. The small-diameter part horizontal trimming die as set forth in claim 1, wherein the side punch (6) is provided with a discharging slope (621), and the slide block (5) is provided with a discharging hole (52) matched with the discharging slope (621).
  7. 7. The small-diameter part horizontal trimming die as set forth in claim 1, wherein the sliding block (5) is provided with a first inclined plane (51), one end of the driving punch (11) close to the first inclined plane (51) is provided with a second inclined plane (111) matched with the first inclined plane (51), and when the die is closed, the second inclined plane (111) of the driving punch (11) is gradually attached to the first inclined plane (51) of the sliding block (5) and gradually forces the sliding block (5) to be far away from the middle positioning column (3).
  8. 8. The small-diameter part horizontal trimming die as set forth in claim 1, wherein a limit groove (32) is formed in the side face of the middle positioning column (3), and the limit groove (32) is matched with a protrusion of the part (8) to limit the circumferential position of the part (8) on the middle positioning column (3).

Description

Horizontal trimming die for small-diameter parts Technical Field The utility model relates to the field of metal trimming dies, in particular to a horizontal trimming die for small-diameter parts. Background In the field of machining, the horizontal trimming of small diameter parts (such as cold-forged workpieces having an internal diameter of 33.4mm, such as buttons) presents significant technical challenges. Such parts typically have high strength characteristics (tensile strength approaching 400 MPa) and a relatively large cut edge thickness (up to 3.4mm thick), making it difficult to directly apply conventional stamping dies. Because the part size is small, the trimming position is very close to the top (minimum only 2.2 mm), if the traditional inward punching die design is adopted, the damage to the middle positioning column is very easy to be caused by stress concentration due to insufficient strength of the middle positioning column, and the service life and the processing stability of the die are seriously influenced. Therefore, the prior art generally relies on CNC milling or electro-discharge machining (EDM) to finish the trimming process. However, the machining method has the obvious defects that firstly CNC milling and EDM machining efficiency is low, a single machining period is long, mass production requirements are difficult to meet, and secondly, the investment and operation cost of the process equipment are high, so that the comprehensive manufacturing cost of parts is greatly increased, and the market competitiveness of products is severely restricted. In addition, the manual operation has high dependency, and the capacity improvement and cost optimization space is further limited. Although attempts have been made in the industry to improve efficiency by optimizing tool paths or improving EDM machining accuracy, the problem of high strength small diameter part trimming has not been fundamentally addressed. There is a need for a mold design that can replace traditional machining and that combines high efficiency and economy to meet the mass production requirements of high strength, small size parts. Disclosure of utility model The utility model mainly solves the technical problem of providing the horizontal trimming die for the small-diameter part, which can avoid damage to the middle positioning column caused by stress concentration when the part on the middle positioning column is punched due to insufficient strength of the middle positioning column caused by small internal space of the die. In order to solve the technical problems, the technical scheme includes that the horizontal trimming die for the small-diameter parts comprises an upper die holder and a lower die holder, wherein a middle positioning column is arranged on the lower die holder, the middle positioning column is used for supporting the parts, a sliding seat is arranged on the outer side of the middle positioning column, a sliding block is in sliding fit with the sliding seat, a side punching head is arranged at one end, close to the middle positioning column, of the sliding block, the side punching head is matched with the bottom surface of the parts, a driving punch is arranged on the upper die holder and is in sliding fit with the sliding block, and accordingly when the dies are matched, the upper die holder drives the driving punch to move towards the sliding block and drives the sliding block to horizontally slide on the sliding seat through the driving punch and to horizontally move from a position, close to the middle positioning column, to a position, far away from the middle positioning column, for trimming the parts. Preferably, the lower die holder is provided with a female die, the female die is arranged on the outer side of the middle positioning column, the female die surrounds the outer edge of the part, and a concave surface is formed on the outer edge of the part, and provides lateral supporting strength for the part. Preferably, the middle positioning column is provided with a punch groove, and one end of the side punch close to the middle positioning column is positioned in the punch groove when the die is opened, so that trimming of the bottom surface of the part is conveniently punched when the die is closed. Preferably, a fixed plate is arranged on the lower die holder, a reset spring is arranged between the fixed plate and the sliding block, and when the die is opened, the reset spring provides pressure for the sliding block to ensure that one end of the side punching head is positioned in a punching head groove of the middle positioning column when the sliding block is not subjected to external force. Preferably, the upper die holder is provided with an upper fixing sleeve, the upper fixing sleeve is provided with a yielding hole, and the upper fixing sleeve passes through the top end of the part and abuts against the part on the middle positioning column through the yielding hole when the die is a