CN210305350U

CN210305350U - Negative angle bending die

Info

Publication number: CN210305350U
Application number: CN201920907018.8U
Authority: CN
Inventors: 周亚峰; 王计省; 佘龙飞; 李继针
Original assignee: Wuxi Baozhong Technology Co Ltd
Current assignee: Wuxi Baozhong Technology Co Ltd
Priority date: 2019-06-15
Filing date: 2019-06-15
Publication date: 2020-04-14
Anticipated expiration: 2029-06-15

Abstract

The utility model discloses a negative angle bending die, it includes first piece and the second piece of bending, the work piece is arranged in on the first piece of bending, be formed with the angle of bending on the first piece of bending, the portion of waiting to bend of work piece stretches out the angle of bending, the angle of mending of the angle of bending equals the target angle of bending and adds the resilience angle, the second piece of bending is located the angle of bending directly over, the second piece of bending can be rotatory around its axle core, and set up the mouth of bending with the angle complex of bending on it, during the bending, the second piece of bending lasts to push down, the angle of bending is aimed at to the mouth of bending, the second is bent and is rotated and drive the work piece and carve with the angle of bending behind the piece contact work piece. Above-mentioned negative angle mould of bending simple structure adds the one shot forming in the action of bending with the compensation of kick-backing, and it is specially to the angle operating mode of bending to non-acute angle, need not the secondary plastic, has saved human cost and mould cost, and the practicality is strong, and machining efficiency is high.

Description

Negative angle bending die

Technical Field

The utility model relates to a five metals stamping die especially relates to a negative angle mould of bending.

Background

Bending is the process in which a force between an upper die and a lower die is applied to a material to cause the material to plastically deform. After stamping and bending, a certain phenomenon, namely springback, exists, the springback amount of a workpiece after bending is different for different stamping materials, and the springback amount is larger for the material with higher tensile strength.

Taking a workpiece bent at an angle of 90 degrees as an example, as shown in fig. 3, the conventional bending structure includes a bending block 1 'and a bending punch 2' at an angle of 90 degrees, a workpiece 5 'is placed on the bending block 1' and is pressed and fixed by a pressing plate 3 ', a 90-degree die cavity is arranged on the bending punch 2' in a matching manner with the bending block 1 ', and the bending punch 2' is pressed downwards to complete the bending action. However, the workpiece actually obtained by this die is not 90 degrees but 89 degrees or 88 degrees, etc., and the workpiece is not qualified. In order to make a qualified workpiece, a process of shaping is required, as shown in fig. 4, a shaping die structure is provided, and two shaping sliders 4' are additionally arranged to compensate the workpiece in the opposite direction, so that the punched workpiece is just at an angle of 90 degrees after rebounding.

Through the mode of eliminating the springback value, a target qualified workpiece can be obtained only by two procedures and two dies, the processing is complex, the efficiency is low, the die cost is high, and the labor cost of personnel is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a negative angle mould of bending through optimizing bending structure, will bend shaping and resilience compensation and once accomplish, reduces the process, reduces mould and human cost.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a negative angle mould of bending, it includes first piece and the second piece of bending, the work piece is arranged in on the first piece of bending, be formed with the angle of bending on the first piece of bending, the portion of waiting to bend of work piece stretches out the angle of bending, the angle of supplementing of the angle of bending equals the target angle of bending and resilience angle, the second piece of bending is located the angle of bending directly over, the second piece of bending can be rotatory around its axle core, and set up on it with the angle complex mouth of bending, during bending, the second piece of bending lasts to push down, the angle of bending is aimed at to the mouth of bending, the second piece of bending is rotatory and drive the work piece after contacting the work piece and carves with the angle of bending and close.

Specifically, still include the holding down backing plate, the holding down backing plate is located the top of first piece of bending, is provided with the fixing base on the holding down backing plate, and the second piece of bending is rotatory to be articulated on the fixing base, still has the pressure flitch through spring coupling on the holding down backing plate, presses the non-portion of bending of flitch and work piece to sticis the contact.

To sum up, the beneficial effects of the utility model are that, compared with the prior art, the negative angle mould simple structure of bending adds the springback compensation and bends in the action one shot forming, and the special angle operating mode of bending to non-acute angle that is to need not the secondary plastic, has saved human cost and mould cost, and the practicality is strong, and machining efficiency is high.

Drawings

Fig. 1 is a schematic structural view of a negative angle bending die provided in an embodiment of the present invention;

fig. 2 is a schematic view of a closed die of a negative angle bending die provided in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a conventional bending die in the prior art;

fig. 4 is a schematic view of a subsequent shaping die of the die of fig. 3.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present embodiment provides a negative angle bending mold, which is suitable for working conditions with a bending angle of 0 to 180 degrees, and particularly has a significant advantage for non-acute angles, and the present embodiment takes 90-degree bending as an example for detailed description.

The die mainly comprises a first bending block 1, a second bending block 2, a pressure plate 3 and a lower pressure base plate 4.

The first bending block 1 is provided with a bending angle 5, the angle supplementing angle of the bending angle 5 is equal to a target bending angle theta (namely 90 degrees) and a rebound angle α, a workpiece 9 is arranged on the first bending block 1, a part to be bent of the workpiece 9 extends out of the bending angle 5, a pressing backing plate 4 is located above the first bending block 1, and a pressing plate 3 is connected to the lower surface of the pressing backing plate 4 through a spring 8 and is just opposite to the non-bending part of the workpiece 9.

The lower pressing base plate 4 is provided with a fixing seat 6, the second bending block 2 is rotatably hinged to the fixing seat 6, the second bending block 2 is located right above the bending angle 5, the second bending block 2 can freely rotate, and a bending opening 7 matched with the bending angle 5 is formed in the second bending block.

During bending, the pressing base plate 4 is continuously pressed downwards to drive the pressing plate 3 and the second bending block 2 to move downwards, the pressing plate 3 is in pressing contact with the non-bending part of the workpiece 9, the second bending block 2 is in contact with the part to be bent and then rotates to drive the workpiece 9 to be wedged with the bending angle 5, and therefore bending is completed.

After completion, the lower platen 4 is reset, and the workpiece 9 rebounds α degrees, so that the target bending angle theta is just obtained.

To sum up, foretell negative angle mould of bending simple structure adds the springback compensation and once only forms in the action of bending, and it is specially to the angle operating mode of bending to non-acute angle, need not secondary plastic, has saved human cost and mould cost, and the practicality is strong, and machining efficiency is high.

The above embodiments have been merely illustrative of the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and does not depart from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a negative angle mould of bending, its characterized in that, includes first piece and the second piece of bending, and the work piece is arranged in on the first piece of bending, be formed with the angle of bending on the first piece of bending, the portion of waiting to bend of work piece stretches out the angle of bending, the angle of mending of the angle of bending equals the target angle of bending and adds the resilience angle, the second piece of bending is located directly over the angle of bending, the second piece of bending can be rotatory around its axle core, and seted up on it with the mouth of bending of angle complex, during bending, the second piece of bending lasts to be pushed down, and the mouth of bending aims at the angle of bending, and the second piece of bending is rotatory and drive the work piece and carve with the angle of bending behind the contact work piece and closes.

2. The negative angle bending die of claim 1, wherein: the bending device is characterized by further comprising a pressing backing plate, the pressing backing plate is located above the first bending block, a fixing seat is arranged on the pressing backing plate, the second bending block is hinged to the fixing seat in a rotating mode, a material pressing plate is further connected to the pressing backing plate through a spring, and the material pressing plate is in pressing contact with a non-bending portion of a workpiece.