CN109531903B

CN109531903B - Punching structure for forming felt forming die

Info

Publication number: CN109531903B
Application number: CN201811645186.0A
Authority: CN
Inventors: 徐利强
Original assignee: Shanghai Huate Enterprise Group Co ltd
Current assignee: Shanghai Huate Enterprise Group Co ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2024-02-20
Anticipated expiration: 2038-12-29
Also published as: CN109531903A

Abstract

The invention relates to a punching structure for a forming die of a forming felt, which is arranged on the forming die and comprises an outer punching block for propping against the outer side surface of a part to be punched of the forming felt product, an inner punching block matched with the outer punching block to prop against the inner side surface of the part to be punched of the forming felt product, an outer cylinder and an inner cylinder which respectively drive the outer punching block and the inner punching block to move in opposite directions, and a punching knife is further arranged on the outer punching block. Compared with the prior art, the die-cutting machine has the advantages that the die-cutting position is changed into a structure that two cylinders mutually force, the die-cutting force is structurally enhanced, the condition that the original unidirectional force is possibly insufficient is changed, in addition, after die-cutting is finished, the die-cutting position can be withdrawn, so that a product is easier to die-cut, and the phenomenon that the product is difficult to take out and buckle in the original process is avoided.

Description

Punching structure for forming felt forming die

Technical Field

The invention belongs to the technical field of die manufacturing, and relates to a punching structure for a forming felt forming die.

Background

With the continuous development of the automobile industry, the application of the formed felt parts is more and more widespread, even in some structures which can be formed by injection molding parts, and as is well known, the forming process of the formed felt is an up-down compression molding process, the structural design of the part needs to have enough demolding angle design, and if a certain interference exists between one edge or angle and the up-down compression molding direction due to the design of the product, the reverse auxiliary punching structure is needed to be added in the design process of the die, the conventional auxiliary punching structure generally adopts a single-cylinder structure to punch the formed felt product, and the single-cylinder punching structure is directly taken out from the die after the part is formed due to unilateral stress in the punching process, and the part is forcedly taken out due to the fact that the part has no avoidance structure, so that a certain amount of deformation is generated on the die, the load of the structural knife edge of the die is very high, the knife edge is easy to be damaged, and the service life of the die is greatly reduced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a punching structure for a forming felt forming die.

The aim of the invention can be achieved by the following technical scheme:

the punching structure comprises an outer punching block for propping against the outer side surface of a part to be punched of the formed felt product, an inner punching block matched with the outer punching block to prop against the inner side surface of the part to be punched of the formed felt product, and an outer cylinder and an inner cylinder which respectively drive the outer punching block and the inner punching block to move in opposite directions, wherein a punching cutter is further arranged on the outer punching block.

Further, a limiting block capable of ascending and descending is further arranged below the moving direction of the inner punching block, and when the inner punching block moves in place and abuts against the formed felt product, the limiting block is lifted upwards and clamps the inner punching block so as to prevent the inner punching block from retreating in the punching process.

Furthermore, a limiting cylinder for driving the limiting block to lift up and down is fixedly arranged at the lower end of the limiting block.

Still more preferably, the output end of the limiting cylinder is connected with the limiting block through a transmission rod, and a guide seat for the transmission rod to pass through is further arranged on the forming die.

Further, the front end surfaces of the inner punching block and the outer punching block are respectively provided with punching molded surfaces matched with the inner surface and the outer surface of the part to be punched of the formed felt product.

Further, the outer punching block is provided with the punching blade below the punching processing profile thereof.

Compared with the prior art, the die-cutting process is finished by changing the original single oil cylinder die-cutting structure into two oil cylinders, and the two structures have certain adjustment space, so that the die is easier to adjust to adapt to the product process in the use process, meanwhile, the structure of mutually forcing the two cylinders is changed at the die-cutting position, the die-cutting force is structurally enhanced, the original unidirectional possibly insufficient force is changed, in addition, the die-cutting position can be withdrawn after the die-cutting is finished, the product is easier to die-cut, and the phenomenon that the product is difficult to take and buckle in the original process is avoided. Meanwhile, due to the fact that the two punching sections of the formed felt product are subjected to acting force in the punching process, stress uniformity of the formed felt product can be improved, and the problems that edges of the product processing parts are curled and the like due to single stress are effectively prevented.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is an enlarged schematic view of the encircled portion of FIG. 1;

the figure indicates:

the device comprises a 1-external oil cylinder, a 2-internal oil cylinder, a 3-external punching block, a 4-internal punching block, a 5-limiting block, a 6-limiting oil cylinder, a 7-guide seat, an 8-forming die and a 9-forming felt product.

Detailed Description

The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.

Example 1

The punching structure for the forming felt forming die is arranged on the forming die 8, referring to fig. 1, and comprises an outer punching block 3 for propping against the outer side surface of a part to be punched of a forming felt product 9, an inner punching block 4 matched with the outer punching block 3 to prop against the inner side surface of the part to be punched of the forming felt product 9, and an outer cylinder 1 and an inner cylinder 2 which respectively drive the outer punching block 3 and the inner punching block 4 to move in opposite directions, wherein a punching knife is further arranged on the outer punching block 3.

Referring to fig. 1 again, in order to avoid the problem that the internal cylinder 2 is retracted due to the excessive punching force of the external cylinder 1, a vertically movable limiting block 5 is further disposed below the moving direction of the internal punching block 4, and when the internal punching block 4 moves in place and abuts against the formed felt product 9, the limiting block 5 is lifted upwards and clamps the internal punching block 4, so as to prevent the internal punching block 4 from retracting during punching (a clamping interface corresponding to the limiting block 5 can be disposed on the internal punching block 4 or a rod member in transmission connection with the internal punching block 4), and a limiting cylinder 6 for driving the internal punching block 4 to vertically lift is fixed at the lower end of the limiting block 5.

In order to protect the limiting cylinder 6, the output end of the limiting cylinder 6 is connected with the limiting block 5 through a transmission rod, and a guide seat 7 for the transmission rod to pass through is further arranged on the forming die 8.

Referring to fig. 1 again, the opposite front end surfaces of the inner punching block 4 and the outer punching block 3 are respectively provided with punching profiles matched with the inner and outer surfaces of the part to be punched of the formed felt product 9, and the outer punching block 3 is provided with the punching knife below the punching profiles.

The die cutting process of this example is as follows:

referring to fig. 1, after the forming die 8 is opened, the outer cylinder 1 drives the outer punching block 3 to move to the leftmost end, the inner cylinder 2 drives the inner punching block 4 to move to the rightmost end, and then, a forming felt is placed and clamped. Then, the internal punching block 4 of the internal cylinder 2 moves to the leftmost end and is positioned against the formed felt product 9, the limiting cylinder 6 drives the limiting block 5 to lift and clamp the internal punching block 4, the internal punching block 4 is prevented from retracting to improve the limiting effect, and the external cylinder 1 drives the external punching block 3 to the rightmost end to complete punching and pressure maintaining. After the pressure maintaining punching is completed, the punching cutter on the outer punching block 3 is matched with the inner punching block 4 to punch the formed felt product 9 at the punching edge position 10, so that the formed felt product 9 in the cavity of the forming die 8 is effectively separated from the formed felt product 9, as shown in fig. 2, and then the limiting cylinder 6 is retracted, the inner cylinder 2 and the outer cylinder 1 are also retracted respectively, and the die is opened and the punched formed felt product 9 is taken out.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.

Claims

1. The punching structure for the forming die of the forming felt is arranged on the forming die (8) and is characterized by comprising an outer punching block (3) for propping against the outer side surface of a part to be punched of a forming felt product (9), an inner punching block (4) matched with the outer punching block (3) to prop against the inner side surface of the part to be punched of the forming felt product (9), an outer cylinder (1) and an inner cylinder (2) for respectively driving the outer punching block and the inner punching block (4) to move towards each other, and a punching knife is further arranged on the outer punching block (3);

a limiting block (5) capable of ascending and descending is further arranged below the inner punching block (4) in the moving direction, and when the inner punching block (4) moves in place and abuts against the formed felt product (9), the limiting block (5) is lifted upwards and clamps the inner punching block (4) so as to prevent the inner punching block (4) from retreating in the punching process;

a limiting cylinder (6) for driving the limiting block (5) to lift up and down is fixedly arranged at the lower end of the limiting block;

the output end of the limiting cylinder (6) is connected with the limiting block (5) through a transmission rod, and a guide seat (7) for the transmission rod to pass through is also arranged on the forming die;

the front end surfaces of the inner punching block (4) and the outer punching block (3) which are opposite are respectively provided with punching molded surfaces matched with the inner surface and the outer surface of the part to be punched of the formed felt product (9);

the outer punching block (3) is provided with the punching knife below the punching molded surface.