CN104923663A - One-time negative angle forming mold - Google Patents

Abstract

The invention discloses a one-time negative angle forming die which comprises an upper die, a lower die forming block, an upper die forming block and a negative angle forming mechanism. The lower die forming block is arranged on the lower die and comprises a fixed block and movable blocks positioned on two sides of the fixed block; the whole lower die forming block is in an inverted shape, the fixed block is in a regular trapezoid shape, the movable block is in an inverted trapezoid shape, and the fixed block and the movable block are connected and matched through guide rails on adjacent surfaces; the bottom surfaces of the two movable blocks are respectively matched with an ejector rod which is arranged on the lower die through a spring; the negative angle forming mechanism is arranged on the upper die and is positioned on one side of the upper die forming block; the negative angle forming mechanism comprises a base, a rotatable negative angle forming block, a spring and a push rod. The invention has simple structure and reasonable design, realizes one-time negative angle forming processing of parts by utilizing the rotatable negative angle forming block, has high processing efficiency, can realize the angle forming angle by replacing the rotatable negative angle forming block with different negative angle forming ports, and has good universality.

Description

One-time negative angle forming mold

technical field

The invention relates to a mold, in particular to a mold for negative angle bending.

Background technique

In order to meet the needs of use or design, many parts need to be bent to a negative angle, and negative angle bending is very common in machining. At present, limited by the structure of the mold, in order to achieve negative angle bending, a three-step processing method is generally used. The specific processing steps are as follows: 1. First bend the product upwards as a whole, as shown in Figure 1; 2. Then Negative angle bending, as shown in Figure 2; 3. After the above processing is completed, the product is bent and leveled in step 1 to reset the product, as shown in Figure 3. This method requires three-step processing, and during processing, three different molds are required to cooperate, and the parts also need to be shifted after one-step processing and sent to the next step of processing, making the negative angle forming process extremely time-consuming, laborious, and expensive. The efficiency is low and the processing cost is high.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the existing negative angle forming process and provide a mold capable of one-time negative angle forming.

To achieve the above object, the technical solution adopted in the present invention is:

A mold for one-time negative angle forming includes an upper mold, a lower mold, a lower mold forming block, an upper mold forming block, and a negative angle forming mechanism.

The molding block of the lower mold is installed on the lower mold, including the fixed block and the movable blocks on both sides of the fixed block;

The forming block of the lower mold is in an inverted shape as a whole, the fixed block is in a positive trapezoidal shape, and the movable block is in an inverted trapezoidal shape, and the fixed block and the movable block are connected and matched through guide rails on adjacent surfaces;

The bottom surfaces of the two movable blocks each cooperate with a push rod installed on the lower mold through a spring;

The forming block of the upper mold is installed on the upper mold;

The negative angle forming mechanism is installed on the upper mold and is located on one side of the forming block of the upper mold;

The negative angle forming mechanism includes a base, a rotatable negative angle forming block, a spring, and a push rod;

There is an arc-shaped installation opening on the base;

The rotatable negative-angle forming block is spherical, and is embedded in the arc-shaped installation opening of the base;

The rotatable negative-angle forming block is provided with a negative-angle forming port for negative-angle forming;

The rotatable negative-angle forming block is also provided with a guide groove, which cooperates with the ejector rod installed in the base through a spring;

The rotatable negative angle forming block is aligned with the movable block.

When the present invention works, the upper mold goes down, driving the upper mold forming block and the negative angle forming mechanism to go down synchronously. The negative-angle forming port of the negative-angle forming cavity cooperates with the movable block to form a negative-angle forming cavity, and the negative-angle forming process is performed on the parts. Separation, and at the same time, the movable block is pressed upward by the ejector rod, driving the whole part upward, and separated from the negative-angle forming surface of the part, which is convenient for the part to be taken out.

The invention has a simple structure and a reasonable design. The one-time negative angle forming process of the parts is realized by using the rotatable negative angle forming block, and the processing efficiency is high. Forming blocks can be realized, and the versatility is good.

Description of drawings

Fig. 1 is a structural schematic diagram of the first step of forming during conventional negative angle forming processing.

Fig. 2 is a structural schematic diagram of the second step of forming during conventional negative angle forming processing.

Fig. 3 is a structural schematic diagram of the third step of forming during conventional negative angle forming processing.

Fig. 4 is a structural schematic view of the present invention when the mold is opened.

Fig. 5 is a structural schematic view of the present invention when the mold is closed.

Fig. 6 is a structural schematic diagram of the negative angle forming mechanism in the present invention.

Detailed ways

In order to facilitate a further understanding of the present invention, an embodiment is given in conjunction with the accompanying drawings to further describe the present invention.

Example:

As shown in FIGS. 4-6 , the present invention includes an upper mold 1 , a lower mold 2 , a lower mold forming block 3 , an upper mold forming block 4 , and a negative angle forming mechanism 5 .

The lower mold forming block 3 is installed on the lower mold 2, including a fixed block 6 and movable blocks 7 located on both sides of the fixed block 6;

The lower molding block 3 is in an inverted shape as a whole, the fixed block 6 is in a positive trapezoidal shape, and the movable block 7 is in an inverted trapezoidal shape, and the fixed block 6 and the movable block 7 are connected and matched by guide rails on adjacent surfaces;

The bottom surfaces of the two movable blocks 7 each cooperate with a push rod installed on the lower die 2 through a spring;

The upper mold forming block 4 is installed on the upper mold;

The negative angle forming mechanism 5 is installed on the upper mold 1 and is located on one side of the upper mold forming block 4;

The negative angle forming mechanism 5 includes a base 8, a rotatable negative angle forming block 9, a spring 10, and a push rod 11;

There is an arc-shaped installation opening on the base 8;

The rotatable negative-angle forming block 9 is spherical, and is embedded in the arc-shaped installation opening of the base 8;

The rotatable negative angle forming block 9 is provided with a negative angle forming opening 12 for negative angle forming;

The rotatable negative angle molding block 9 is also provided with a guide groove, which cooperates with the push rod 11 installed in the base through the spring 10;

The rotatable negative angle forming block 9 is aligned with the movable block 7 .

The above embodiments are optimized embodiments of the present invention, and are not intended to limit the present invention in any form. Any skilled person who is familiar with the profession may use the technical content disclosed above to change or modify the equivalent embodiments of equivalent changes. Any modifications, equivalent changes and amendments made to the above embodiments according to the technical essence of the present invention without departing from the principle and content of the technical method of the present invention still belong to the scope of the technical method of the present invention.

Claims (1)

1. A mold for one-time negative angle molding, characterized in that: it includes an upper mold, a lower mold, a lower mold forming block, an upper mold forming block, and a negative angle forming mechanism, and the lower mold forming block is installed on the lower mold, including a fixed Blocks and movable blocks located on both sides of the fixed block; the lower mold forming block is in an inverted shape as a whole, the fixed block is in a positive trapezoidal shape, and the movable block is in an inverted trapezoidal shape. The fixed block and the movable block are connected and matched through guide rails on the adjacent surfaces The bottom surfaces of the two movable blocks are respectively matched with a push rod installed on the lower mold through a spring; the forming block of the upper mold is installed on the upper mold; the negative angle forming mechanism is installed on the upper mold and is located in the upper mold One side of the block; the negative-angle forming mechanism includes a base, a rotatable negative-angle forming block, a spring, and a push rod; an arc-shaped installation port is provided on the base; the rotatable negative-angle forming block is spherical and inlaid Installed in the arc-shaped installation port of the base; the rotatable negative-angle forming block is provided with a negative-angle forming opening for negative-angle forming; the rotatable negative-angle forming block is also provided with a guide groove, and the guide groove and The ejector rod installed in the base is matched by a spring; the rotatable negative-angle forming block is aligned with the movable block.