CN215431145U

CN215431145U - Blanking and punching composite die for flange plate

Info

Publication number: CN215431145U
Application number: CN202121592317.0U
Authority: CN
Inventors: 寇允; 胡志栋; 张新弛
Original assignee: Northeast Forestry University
Current assignee: Northeast Forestry University
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-01-07
Anticipated expiration: 2031-07-13

Abstract

The utility model provides a blanking and punching compound die for a flange plate, and belongs to the field of die design. The problem of current blanking and punching compound mould can't reach the processing requirement is solved. The upper backing plate and the female die are fixedly connected through a first cylindrical pin and a first screw, the die shank is fixed on the frame through the upper die frame, the shouldered push rod is arranged in the die shank, the knockout rod is connected with the punch fixing plate and the upper backing plate in a matched mode, the ejector is arranged in a matched mode with the female die, the punch is pressed into the punch fixing plate, the plate is positioned through the male die and the material blocking pin, the stripper, the rubber, the fixing plate, the lower backing plate and the lower die frame are fixedly connected through a third cylindrical pin and the unloading screw, and the lower portion of the guide column is connected with the outer diameter of a guide column hole of the lower die frame and the outer diameter of a guide column hole of the upper die frame in an interference fit mode. The blanking and punching device is mainly used for blanking and punching of the flange plate.

Description

Blanking and punching composite die for flange plate

Technical Field

The utility model belongs to the field of die design, and particularly relates to a blanking and punching compound die for a flange plate.

Background

The punching process is a metal processing method, which is based on the plastic deformation of metal, and applies pressure to the plate by using a die and punching equipment to make the plate generate plastic deformation or separation, thereby obtaining a part with certain shape, size and performance. The existing blanking-punching compound die is mainly used for processing and producing three small holes, namely blanking, punching a prefabricated hole and punching, the method is easy to cause processing failure due to the fact that the distance between the edges of the small holes and the edges of the appearance is insufficient, and the wall thickness of a concave-convex die cannot meet the requirement.

SUMMERY OF THE UTILITY MODEL

The utility model provides a blanking and punching compound die for a flange plate, aiming at solving the problems in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme: a blanking and punching compound die for a flange plate comprises a first cylindrical pin, a shouldered push rod, a die shank, a male die, an upper die frame, a knockout rod, a first screw, a stop pin, a female die, rubber, a lower backing plate, a guide pillar, a third cylindrical pin, a lower die frame, a discharge screw, a male-female die, a fixing plate, a discharge plate, a guide sleeve, a plate material, a workpiece pushing device, a hollow backing plate, a male die fixing plate and a female die, wherein the upper die frame, the hollow backing plate, the male die fixing plate, the upper backing plate and the female die are fixedly connected through the first cylindrical pin and the first screw, the die shank is fixed on a frame through the upper die frame, the shouldered push rod is arranged in the die shank, the knockout rod is connected with the male die fixing plate and the upper backing plate in a matched mode, the male die is arranged in a matched mode, the male die is pressed into the male die fixing plate, the plate is positioned through the male die and the stop pin, the discharge plate is positioned through the male die and the stop pin, The rubber, the fixing plate, the lower backing plate and the lower die frame are fixedly connected through a third cylindrical pin and a discharging screw, and the lower part of the guide pillar is connected with the guide pillar hole of the lower die frame, the outer diameter of the guide sleeve and the guide sleeve hole of the upper die frame in an interference fit mode.

Furthermore, the die handle is connected with the upper die frame through an anti-rotation pin.

Furthermore, the knockout pin is in interference fit with the punch retainer and the upper backing plate.

Furthermore, the height of the material beating rod corresponds to that of the piece pushing device.

Furthermore, the upper die frame and the lower die frame are pressed tightly through a second cylindrical pin and a second screw.

Compared with the prior art, the utility model has the beneficial effects that: the blanking and punching composite die solves the problem that the existing blanking and punching composite die cannot meet the processing requirements. The utility model can ensure the precision and quality of parts and is suitable for medium-batch production.

Drawings

Fig. 1 is a schematic structural view of a blanking and punching compound die for a flange plate according to the present invention.

1-a first cylindrical pin, 2-an anti-rotation pin, 3-a shouldered push rod, 4-a die handle, 5-a male die, 6-an upper die frame, 7-a second cylindrical pin, 8-a knockout pin, 9-a first screw, 10-a striker pin, 11-a female die, 12-rubber, 13-a second screw, 14-a lower backing plate, 15-a guide pillar, 16-a third cylindrical pin, 17-a lower die frame, 18-a discharge screw, 19-a male-female die, 20-a fixed plate, 21-a discharge plate, 22-a guide sleeve, 23-a plate material, 24-a part pusher, 25-a hollow backing plate, 26-a male die fixed plate and 27-an upper backing plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1 to illustrate the embodiment, a blanking and punching compound die for a flange plate comprises a first cylindrical pin 1, a shouldered push rod 3, a die shank 4, a male die 5, an upper die frame 6, a knockout rod 8, a first screw 9, a striker pin 10, a female die 11, rubber 12, a lower backing plate 14, a guide post 15, a third cylindrical pin 16, a lower die frame 17, a discharge screw 18, a male-female die 19, a fixing plate 20, a discharge plate 21, a guide sleeve 22, a plate material 23, a pusher 24, a hollow backing plate 25, a male die fixing plate 26 and an upper backing plate 27, wherein the upper die frame 6, the hollow backing plate 25, the male die fixing plate 26, the upper backing plate 27 and the female die 11 are fixedly connected through the first cylindrical pin 1 and the first screw 9, the die shank 4 is fixed on a machine frame through the upper die frame 6, the shouldered push rod 3 is arranged in the die shank 4, the knockout rod 8 is connected with the male die fixing plate 26 and the upper backing plate 27 in a matching manner, the part pushing device 24 is matched with the female die 11, the male die 5 is pressed into the male die fixing plate 26, the plate 23 is positioned through the male die 19 and the female die 10, the discharging plate 21, the rubber 12, the fixing plate 20, the lower backing plate 14 and the lower die frame 17 are fixedly connected through the third cylindrical pin 16 and the discharging screw 18, and the lower portion of the guide post 15 is connected with the guide post hole of the lower die frame and the outer diameter of the guide sleeve 22 in an interference fit mode with the guide sleeve hole of the upper die frame.

In the embodiment, the die shank 4 is connected with the upper die frame 6 through the anti-rotation pin 2, the material beating rod 8 is in interference fit with the punch fixing plate 26 and the upper backing plate 27, the height of the material beating rod 8 corresponds to the part pushing device 24, and the upper die frame 6 and the lower die frame 17 are compressed through the second cylindrical pin 7 and the second screw 13.

The size precision of the blanking part is mainly determined by the size precision of the cutting edge of the die, and the reasonable clearance value of the die is ensured by the size and the manufacturing precision of the cutting edge of the die. There is a need to accurately determine the dimensions of the die edge and its manufacturing tolerances. Because a gap exists between the male die 5 and the female die 11, the fallen material or the punched hole has taper, the size of the large end of the blanking piece is equal to that of the female die 11, and the size of the small end of the punching piece is equal to that of the male die 11. In measurement and use, the blanking piece is based on the size of the large end, and the hole diameter of the punching hole is based on the size of the small end. During punching, the male die 5 and the female die 11 need to rub against a punched part or waste, and the smaller the wear of the male die 5 is, the larger the wear of the female die 11 is, and as a result, the larger and larger the gap is.

The following principles are therefore considered in determining the dimensions of the die edge and its manufacturing tolerances:

1) the size of the blanking part is determined by the size of the female die 11, and the size of the hole in punching is determined by the size of the male die 5. Therefore, when the blanking die is designed, the female die 11 is taken as a reference, and the gap is taken on the male die 5; when designing the punching die, the male die 5 is taken as a reference, and the punching die is intermittently taken on the female die 11.

2) Considering the abrasion of the male die 5 and the female die 11 in blanking, when a blanking die is designed, the basic size of the female die 11 is a smaller size within a size tolerance range; when designing the punching die, the basic size of the male die 5 is a larger size within the tolerance range of the size of the workpiece hole. Thus, under the condition that the male die 5 and the female die 11 are abraded to a certain degree, qualified products can still be punched out. The minimum reasonable clearance value is adopted for the clearance between the male die 5 and the female die 11.

3) When determining the manufacturing tolerance of the cutting edge of the die, the tolerance requirement of the product is considered. If the requirement on the accuracy of the cutting edge is too high (namely the manufacturing tolerance is too small), the die is difficult to manufacture, the cost is increased, and the production period is prolonged; if the cutting edge accuracy requirement is too low (i.e., manufacturing tolerances are too great), the resulting part may be defective, which may reduce the life of the mold. If the manufactured piece has no tolerance, the non-circular piece is processed according to the national standard 'tolerance value of non-fit size' IT14 level, and the punching die can be manufactured according to IT11 level; for round pieces, molds are typically made at levels IT 7-IT 6. The dimensional tolerance of the stamping part is marked according to the 'body-entering' principle, the upper deviation of the blanking part is zero, and the lower deviation is negative; the lower deviation of the punching part is zero, and the upper deviation is positive.

As shown in fig. 1, the male and female dies 19 are mounted on the lower die, and the blanking female die 11 is mounted on the upper die. The sheet is placed between the female die 11 and the stripper 21, when the die works, the upper die and the lower die are closed, the male die and the female die are pressed upwards to perform blanking, and the male die 5 is pressed downwards to perform punching. After the machining is finished, the upper die and the lower die are separated, the die handle 4 is pressed downwards to drive the knockout rod 8 to press the part pushing device 24 to the outer side of the female die 11, a workpiece is discharged onto the discharging plate 21, and meanwhile, punching waste is discharged from the inner side of the concave-convex die hole. And finishing the processing.

The blanking and punching compound die for the flange plate provided by the utility model is described in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a blanking and punching compound mould for ring flange which characterized in that: the die comprises a first cylindrical pin (1), a push rod (3) with a shoulder, a die shank (4), a male die (5), an upper die frame (6), a knockout rod (8), a first screw (9), a material blocking pin (10), a female die (11), rubber (12), a lower backing plate (14), a guide post (15), a third cylindrical pin (16), a lower die frame (17), a discharge screw (18), a male and female die (19), a fixing plate (20), a discharge plate (21), a guide sleeve (22), a plate (23), a piece pushing device (24), a hollow backing plate (25), a male die fixing plate (26) and an upper backing plate (27), wherein the upper die frame (6), the hollow backing plate (25), the male die fixing plate (26), the upper backing plate (27) and the female die (11) are fixedly connected through the first cylindrical pin (1) and the first screw (9), the die shank (4) is fixed on the machine frame through the upper die frame (6), the push rod (3) with the shoulder is arranged in the die shank (4), the knockout rod (8) is connected with a punch fixing plate (26) and an upper backing plate (27) in a matched mode, the ejector (24) is arranged in a matched mode with the female die (11), the male die (5) is pressed into the punch fixing plate (26), the plate (23) is positioned through the male and female die (19) and the material blocking pin (10), the discharging plate (21), the rubber (12), the fixing plate (20), the lower backing plate (14) and the lower die frame (17) are fixedly connected with the discharging screw (18) through the third cylindrical pin (16), and the lower portion of the guide pillar (15) is connected with the outer diameter of a guide pillar hole and a guide sleeve (22) of the lower die frame in an interference fit mode.

2. The blanking and punching compound die for the flange plate as claimed in claim 1, wherein: the die handle (4) is connected with the upper die frame (6) through an anti-rotation pin (2).

3. The blanking and punching compound die for the flange plate as claimed in claim 1, wherein: the knockout pin (8) is in interference fit with the punch retainer (26) and the upper backing plate (27).

4. The blanking and punching compound die for the flange plate as claimed in claim 1, wherein: the height of the knockout rod (8) corresponds to that of the piece pushing device (24).

5. The blanking and punching compound die for the flange plate as claimed in claim 1, wherein: the upper die frame (6) and the lower die frame (17) are pressed tightly through a second cylindrical pin (7) and a second screw (13).