CN111774483A

CN111774483A - Mechanical time delay mechanism of drawing die

Info

Publication number: CN111774483A
Application number: CN202010649957.4A
Authority: CN
Inventors: 王超; 王东雨; 赵晓峰; 潘四平; 穆俊向; 蒋金池
Original assignee: Gz Tooling Group Automobile Technology Co ltd
Current assignee: Gz Tooling Group Automobile Technology Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2020-10-16

Abstract

The invention provides a mechanical time delay mechanism of a drawing die, which belongs to the field of dies and comprises a first nitrogen spring, a first ejector rod, a second nitrogen spring, a fixed seat, a second ejector rod, a swinging block, a shaft rod, a mounting seat and a cushion block, wherein the first nitrogen spring, the first ejector rod, the second nitrogen spring, the second ejector rod, the swinging block, the shaft rod and the cushion block are cooperatively operated to prevent a plate from deforming.

Description

Mechanical time delay mechanism of drawing die

Technical Field

The invention belongs to the field of dies, and particularly relates to a mechanical time delay mechanism of a drawing die.

Background

In the stamping production of the drawing die, the die structure is mainly characterized in that a lower die holder part is provided with a lower pressing plate for pressing materials, a machine tool slide block drives a female die to move upwards when moving upwards, a pressing ring uses a nitrogen spring as a pressure source, when the die is opened, the pressing ring can move upwards at first, at the moment, a part does not break away from the lower die under the action of the pressing plate inside the female die, and the plate can deform at the position of the pressing ring, so that the upper die needs to break away from the lower die, the pressing ring moves upwards, and the plate can be guaranteed not to deform. The traditional die structure has the advantages that a cylinder or a time-delay nitrogen spring is used as an elastic element of a lower material pressing plate, the whole die is used for stamping an electric signal and pneumatic connection signal control, the frequency of matching various signals with a machine tool needs to be adjusted, the traditional die needs to use two signals of a gas circuit and a circuit for simultaneous matching control when pneumatic work is carried out, the gas circuit signal and the frequency of the machine tool are manually matched, a gas circuit force source is related to a factory and equipment, and the production smoothness cannot be guaranteed when the gas pressure fluctuates; if the time delay nitrogen spring is used and is connected with an electric circuit, not only regular maintenance and repair are needed, but also the purchase, repair and maintenance cost is extremely high.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a mechanical delay mechanism of a drawing die, which can effectively solve the problem of deformation of a plate at a blank holder and reduce the production cost.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a drawing die mechanical type time delay mechanism, its installs on drawing die, drawing die includes upper die base, top board, blank holder and die holder, its characterized in that: the mechanical drawing die delay mechanism comprises a first nitrogen spring, a first ejector rod, a second nitrogen spring, a fixed seat, a second ejector rod, a swinging block, a shaft rod, an installation seat and a cushion block, wherein the first nitrogen spring is installed in the upper die seat and is propped against one end of the first ejector rod; one end of the first ejector rod, which is far away from the first nitrogen spring, is of a round head structure, and the end penetrates through the upper pressure plate and abuts against one end of the upper end face of the swing block; the shaft lever penetrates through the interior of the swinging block, and the swinging block can swing around the shaft lever by taking the shaft lever as an axis; the second nitrogen spring is arranged in the upper pressing plate and is propped against one end of the second ejector rod, and the pressure value of the second nitrogen spring is smaller than that of the first nitrogen spring; one end of the second ejector rod, which is far away from the second gas spring, is of a round head structure and props against the other end of the upper end face of the swinging block; the fixed seat and the mounting seat are fixed together through bolts and locked on the upper pressure plate together; the cushion block is arranged on the blank holder.

In a preferred embodiment of the present invention, the shaft is composed of a shaft body, and a small end and a large end at both ends of the shaft body, and the small end is a threaded rod engaged with a nut.

Through the design scheme, the invention can bring the following beneficial effects: compared with a delay nitrogen spring, the mechanical delay mechanism of the drawing die can effectively solve the problem of plate deformation, realizes automation in the process of stamping parts, does not need manual matching and debugging, reduces installation time, increases the working stability of the die, increases stamping frequency, saves cost and improves working efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limitation and are not intended to limit the invention in any way, and in which:

fig. 1 is a schematic view of a mechanical delay mechanism of a drawing die in a closed state.

Fig. 2 is a schematic view of the drawing die mechanical delay mechanism in the die opening state.

Fig. 3 is a partially enlarged view of the mechanical delay mechanism of the drawing die.

Fig. 4 is a sectional view taken along line a-a of fig. 3.

Fig. 5 is a schematic structural view of a conventional drawing die.

The respective symbols in the figure are as follows: 1-a first nitrogen spring; 2-a first ejector rod; 3-a second gas spring; 4-fixing the base; 5-a second ejector rod; 6-swinging the block; 7-shaft lever; 8-a mounting seat; 9-cushion block; 10-an upper die holder; 11-an upper platen; 12-a blank holder; 13-lower die holder.

Detailed Description

The present invention will be described in further detail with reference to examples and embodiments. It should be understood that the scope of the present subject matter is not limited to the following examples, and that any techniques implemented based on the teachings of the present invention are within the scope of the present invention. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention. In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only, and the features defined as "first" and "second" do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

For convenience of description, the description of the relative positional relationship of the respective members in the present invention is described based on the layout pattern of the drawings, and the positional relationship of the upper, lower, left, right, etc. is determined based on the layout direction of the drawings.

A mechanical time delay mechanism of a drawing die is arranged on the drawing die, as shown in figure 5, the drawing die comprises an upper die holder 10, an upper pressure plate 11, a blank holder 12 and a lower die holder 13, as shown in figures 1, 2, 3 and 4, the mechanical time delay mechanism of the drawing die comprises a first nitrogen spring 1, a first ejector rod 2, a second nitrogen spring 3, a fixed seat 4, a second ejector rod 5, a swing block 6, a shaft rod 7, a mounting seat 8 and a cushion block 9.

The first nitrogen spring 1 is arranged in the upper die holder 10, and the first nitrogen spring 1 is propped against one end of the first ejector rod 2; one end of the first ejector rod 2, which is far away from the first nitrogen spring 1, is of a round head structure, and the end penetrates through the upper pressure plate 11 and is abutted against one end of the upper end face of the swing block 6; the shaft lever 7 penetrates through the swing block 6, and the swing block 6 can swing around the shaft lever 7 by taking the shaft lever 7 as an axis; as shown in fig. 3 and 4, the shaft rod 7 is composed of a rod body, a small end and a large end, wherein the small end and the large end are arranged at two ends of the rod body, the small end is a threaded rod, when the shaft rod 7 and the swing block 6 are assembled, the shaft rod 7 is inserted into the swing block 6 from the small end and extends out of the swing block 6, the rod body of the shaft rod 7 is arranged inside the swing block 6, the large end of the shaft rod 7 is arranged outside the swing block 6, and then a nut is screwed into the threaded rod to achieve the purpose of preventing the shaft rod from falling off. The second nitrogen spring 3 is arranged in the upper pressing plate 11, the second nitrogen spring 3 is pressed against one end of the second ejector rod 5, and the pressure value of the second nitrogen spring 3 is smaller than that of the first nitrogen spring 1; one end of the second ejector rod 5, which is far away from the second gas spring 3, is of a round head structure and is propped against the other end of the upper end face of the swinging block 6; the fixed seat 4 and the mounting seat 8 are fixed together through bolts and locked on the upper pressure plate 11 together, and the fixed seat 4 and the mounting seat 8 are detachably connected so as to be convenient for dismounting the first nitrogen spring 1 and the second nitrogen spring 3; the said spacer 9 is mounted on the blank holder 12.

The mechanical time delay mechanism of the drawing die is divided into a closed state and an open state in the specific motion process.

1) A closed state: when the drawing die is bottomed, the pressure value of the first nitrogen spring 1 of the standard component is selected to be larger than that of the second nitrogen spring 3, so that the force of the first nitrogen spring 1 is larger than that of the second nitrogen spring 3, and the lower part of the pendulum block 6 swings rightwards. When the drawing die is lifted, the swing block 6 is pressed against the cushion block 9, namely against the blank holder 12, so that the blank holder 12 is kept in a static state before the swing block 6 swings to the left side.

2) Opening the mold: when the drawing die is opened, the first nitrogen spring 1 and the first ejector rod 2 are arranged on the upper die base 10 and are separated from the swinging block 6, the lower part of the swinging block 6 swings to the left side under the pressure action of the second nitrogen spring 3 and is staggered with the cushion block 9, and the blank holder 12 can move freely.

When the machine tool slide block moves downwards, when the upper die holder 10 and the upper pressure plate 11 are pressed at the position of the swing block 6, the lower part of the swing block 6 swings to the right side, when the drawing die is closed to the bottom, the closed state shown in figure 1, and no acting force exists between the blank holder 12 and the swing block 6 in the process. When the machine tool slide block starts to move upwards, the blank holder 12 and the swing block 6 start to contact to obtain acting force, and the upper die base 10 and the upper pressing plate 11 prop against the blank holder 12 through the swing block 6 to enable the blank holder 12 to keep a static state. With the increase of the ascending height of the upper sliding block of the machine tool, after the upper die base 10 and the upper pressing plate 11 integrally form a certain distance with the part, the swinging block 6 loses the jacking force of the upper die base 10, so that the swinging block 6 swings to the left side, the blank holder 12 loses the acting force of the swinging block 6, and the blank holder 12 starts to release. When the upper sliding block of the machine tool moves upwards to the upper dead point, the blank holder 12 supports the part, and the mechanism is completely reset to the initial state. And taking out the stamped part, completing one working cycle, and entering the next working cycle.

Compared with the existing time-delay nitrogen spring, the invention realizes automation in the process of stamping parts, does not need manual matching and debugging, reduces the installation time, increases the working stability of the die, increases the stamping frequency, saves the cost and improves the working efficiency.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that various changes and modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious changes and modifications may be made within the scope of the present invention.

Claims

1. The utility model provides a drawing die mechanical type time delay mechanism, its installs on drawing die, drawing die includes upper die base (10), top board (11), blank holder (12) and die holder (13), its characterized in that: the mechanical time delay mechanism of the drawing die comprises a first nitrogen spring (1), a first ejector rod (2), a second nitrogen spring (3), a fixed seat (4), a second ejector rod (5), a swinging block (6), a shaft rod (7), an installation seat (8) and a cushion block (9), wherein the first nitrogen spring (1) is installed in an upper die seat (10), and the first nitrogen spring (1) is abutted to one end of the first ejector rod (2); one end of the first ejector rod (2), which is far away from the first nitrogen spring (1), is of a round head structure, and the end penetrates through the upper pressure plate (11) and is abutted against one end of the upper end face of the swing block (6); the shaft lever (7) penetrates through the inner part of the swinging block (6), and the swinging block (6) can swing around the shaft lever (7) as an axis; the second nitrogen spring (3) is arranged in the upper pressing plate (11), the second nitrogen spring (3) is pressed against one end of the second ejector rod (5), and the pressure value of the second nitrogen spring (3) is smaller than that of the first nitrogen spring (1); one end of the second ejector rod (5) far away from the second gas spring (3) is of a round head structure and is propped against the other end of the upper end face of the swing block (6); the fixed seat (4) and the mounting seat (8) are fixed together through bolts and locked on the upper pressure plate (11) together; the cushion block (9) is arranged on the blank holder (12).

2. The mechanical delay mechanism of the drawing die of claim 1, wherein: the shaft lever (7) is composed of a lever body, a small head end and a large head end, wherein the small head end and the large head end are arranged at two ends of the lever body, and the small head end is a threaded rod matched with a nut.