CN212792511U

CN212792511U - Bending die capable of retarding indentation on surface of workpiece

Info

Publication number: CN212792511U
Application number: CN202021300409.2U
Authority: CN
Inventors: 华冠中; 程远; 谷友露; 刘昱君; 袁方文
Original assignee: Nanjing Yingnigema Industrial Automation Technology Co ltd
Current assignee: Nanjing Yingnigema Industrial Automation Technology Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-26
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses a slow down mould of bending of workpiece surface indentation, including being used for decomposing the rotary die of the work piece atress of bending, the work piece atress obtains decomposing when making the work piece of bending through the rotary die to reduce the surface indentation. The device also comprises a lower die base, wherein two vertical guide pillars are arranged on the lower die base, and an upper die base which can lift along the vertical direction is sleeved on each guide pillar; the upper die base and the lower die base are parallel to each other. The upper die base is used for pressing down by the bending machine and is sleeved with the guide pillar to move up and down; the upper die holder is also connected with the upper die. The side dies are cubes, one corners of the cubes are provided with hollow areas with preset circular arc radiuses, and the hollow areas of the two side dies are arranged oppositely; at least two lifters capable of vertically lifting are arranged in the hollow area, and a rotating die is arranged in the hollow area in a clearance fit mode. The rotary die is used for dispersing bending stress and reducing creases on the surface of a workpiece. The rotary die is matched in the side die and is pushed to rotate by utilizing the up-and-down movement of the pushing head.

Description

Bending die capable of retarding indentation on surface of workpiece

Technical Field

The utility model relates to a mould of bending, concretely relates to slow down mould of bending of work piece surface indentation.

Background

The bending machine is important equipment for bending and forming workpieces in the sheet metal industry and is used for pressing steel plates into parts in various shapes according to process requirements. The bending die is an important component of the bending machine.

The existing common bending die usually generates indentation on the surface of a workpiece when the workpiece is bent, and is not suitable for the process requirement with higher requirement on the machined surface.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model provides a slow down mould of bending of work piece surface indentation to solve the above-mentioned problem that prior art exists.

The technical scheme is as follows: the utility model provides a slow down mould of bending of work piece surface indentation, includes at least a pair of side form that sets up in opposite directions and form predetermined hollow area, hollow area intra-area clearance fit is equipped with the rotary die who is used for decomposing the work piece atress of bending, the rotary die is through setting up but the gyration of predetermined angle is realized to the top of vertical lift on the side form.

In a further embodiment, the bending die comprises a lower die base, two vertical guide pillars are mounted on the lower die base, and an upper die base capable of lifting along the vertical direction is sleeved on each guide pillar; the upper die base and the lower die base are parallel to each other. The upper die base is used for pressing down by the bending machine and is sleeved with the guide pillar to move up and down; the upper die holder is also connected with the upper die. The upper die is equivalent to a bending cutter and is used for bending and forming a workpiece. The guide pillar is used for guaranteeing the positioning accuracy of the bending of the upper die in the up-and-down motion.

In a further embodiment, the lower die is fixed at the center of the lower die base, side dies are respectively fixed on two sides of the lower die close to the guide post, guide blocks are fixed on two sides of the upper part of each side die, a movable positioning block is arranged on the upper part of the lower die and between the two side dies, and a workpiece to be processed is clamped between the two guide blocks; an upper die is fixed at the lower part of the upper die holder; when the upper die is pressed down, the upper die is directly contacted with a workpiece and bent and formed. The guide block is used for initial guiding when a workpiece is placed. The movable positioning block consists of a spring and a stripper plate ejector rod and is used for initial positioning of an upper piece. The side die is used for facilitating the installation of the rotary die. The movable positioning block floats and is contracted up and down by a spring.

In a further embodiment, the cross section of the lower die is in an I shape; the movable positioning block comprises a stripper plate ejector rod which is elastically stretched by a spring. The lower die is used for forming the bend, and is provided with a spring and an unloading ejector rod to jack the lower die so as to prevent the machined workpiece from being clamped.

In a further embodiment, the side molds are cubes, one corner of each cube is provided with a hollow area with a preset circular arc radius, and the hollow areas of the two side molds are oppositely arranged; at least two lifters capable of vertically lifting are arranged in the hollow area, and a rotating die is arranged in the hollow area in a clearance fit mode. The rotary die is used for dispersing bending stress and reducing creases on the surface of a workpiece. The rotary die is matched in the side die and is pushed to rotate by utilizing the up-and-down movement of the pushing head.

In a further embodiment, the cross-section of the rotary die comprises a circular arc section and a step section; the circular arc section is matched with the hollow area of the side die; the stage is two planes which are milled and form 90 degrees with each other, and the joint of the arc section and the stage is subjected to fillet treatment; and a groove with a preset length is milled at the arc section, and the width of the groove is in clearance fit with the diameter of the plug. The groove is used for being matched with the ejector, and when the ejector extends out, the rotary die is pushed to rotate.

In a further embodiment, an indentation-free polyurethane pad is placed at the lower die, and the indentation-free polyurethane pad is used for avoiding the lower die from directly contacting with the workpiece, so that the indentation on the surface of the workpiece is further reduced.

Has the advantages that: the utility model discloses a slow down mould of bending of workpiece surface indentation makes the work piece atress of bending obtain decomposing through the rotary die to reduce surface indentation. The rotary die is matched in the side die and is pushed to rotate by utilizing the up-and-down movement of the pushing head. And a polyurethane pad or a protective film without indentation is placed at the lower die of the die and is used for preventing the lower die from directly contacting with a workpiece, so that the indentation on the surface of the workpiece is further slowed down.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of a middle die in the second embodiment.

Fig. 3 is a schematic structural view of a rotary die according to a third embodiment.

Fig. 4 is a schematic structural diagram of the movable positioning block.

Fig. 5 is a schematic structural view of the bending machine according to the fourth embodiment of the present invention.

The figures are numbered: the device comprises a power and connecting assembly 1, a die 2, a gas-liquid pressure cylinder 3, a supporting frame 4, a floating joint 5, a connecting flange 6, an upper die base 7, a guide pillar 8, an upper die 9, a guide block 10, a side die 11, a top 1101, a lower die 12, a workpiece 13, a limiting block 14, a movable positioning block 15, a stripper plate ejector rod 1501, a lower die base 16, a rotating die 17, an arc section 1701, a step section 1702 and a groove 1703.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

The first embodiment is as follows:

the utility model relates to a slow down mould 2 of bending of 13 surperficial indents on work piece, mould 2 include upper die base 7, go up mould 9, guide pillar 8, work piece 13, guide block 10, movable positioning piece 15, side form 11, lower mould 12, rotary die 17, stopper 14, die holder 16. Through holes are formed in the two sides of the upper die holder 7, and linear bearings are arranged in the through holes in an interference fit manner; the linear bearing is sleeved on the guide post 8 in a transition fit manner. The guide post 8 is vertically installed on the lower die base 16, and the upper die base 7 is sleeved on the guide post 8 and can lift along the vertical direction. The upper die holder 7 and the lower die holder 16 are parallel to each other. The cross section of the lower die 12 is in an I shape, the lower die 12 is fixed at the center of the lower die base 16, and the side dies 11 are fixed at two sides of the lower die 12 close to the guide post 8. The guide blocks 10 are fixed on both sides of the upper portion of the side mold 11. The movable positioning block 15 is arranged on the upper part of the lower die 12 and between the two side dies 11. A workpiece 13 to be processed is clamped between the two guide blocks 10, an upper die 9 is fixed at the lower part of the upper die holder 7, and when the upper die 9 is pressed downwards, the upper die directly contacts with the workpiece 13 and is bent and formed. The guide block 10 is used for initial guiding when the workpiece 13 is placed. The movable positioning block 15 consists of a spring and a stripper plate mandril 1501 and is used for initial positioning of an upper piece. The side mold 11 is used to facilitate the installation of the rotary mold 17. The movable positioning block 15 is floating and is retracted up and down by a spring.

Example two:

on the basis of the first embodiment, the side mold 11 is a cube with a hollow area with a preset arc radius formed at one corner, and the hollow areas of the two side molds 11 are arranged oppositely; at least two lifters 1101 capable of vertically lifting are arranged in the hollow area, and a rotating die 17 is arranged in the hollow area in a clearance fit mode. The rotary die 17 is used for dispersing bending stress and reducing creases on the surface of the workpiece 13. The rotary die 17 is fitted to the side die 11, and moved up and down by the ram 1101 to rotate against the rotary die 17.

Example three:

on the basis of the first and second embodiments, the cross section of the rotary die 17 includes a circular arc section 1701 and a step section 1702; the circular arc section 1701 is matched with a hollow area of the side die 11; the step section 1702 is two planes which are milled and form 90 degrees with each other, and the joint of the circular arc section 1701 and the step section 1702 is subjected to rounding treatment; a groove 1703 with a predetermined length is milled at the circular arc section 1701, and the width of the groove 1703 is in clearance fit with the diameter of the plug 1101.

Example four:

on the basis of aforementioned embodiment one, embodiment two, embodiment three, will the utility model relates to a mould 2 uses on the bender, and the bender comprises power and coupling assembling 1 and mould 2. The power and connecting assembly 1 comprises a gas-liquid pressure cylinder 3, a floating joint 5, a connecting flange 6 and a supporting frame 4. The supporting frame 4 is made of 45 steel and is used for supporting the gas-liquid pressure cylinder 3 and the output force of the gas-liquid pressure cylinder. The gas-liquid pressure cylinder 3 is arranged on the supporting frame 4, the output end of the gas-liquid pressure cylinder 3 is provided with a floating joint 5, and one end of the floating joint 5 is provided with a connecting flange 6 connected to one end of the mould 2. The gas-liquid pressure cylinder 3 is used for providing bending force, and the bending force needs to be 0.6-0.8T to meet the requirement. The floating joint 5 and the connecting flange 6 are used for connecting the gas-liquid pressure cylinder 3 and the upper die base 7, and the floating joint 5 is used for preventing the upper die base 7 from being positioned and positioned excessively at the same time of the floating joint 5 and the guide pillar 8. The supporting frame 4 is used for supporting the gas-liquid pressurizing cylinder 3 and the output force thereof.

Based on the above embodiment, the utility model discloses a working process as follows:

step 1, a workpiece 13 is placed in a position shown in the figure and supported by a lower die 12, and a guide block 10 and a movable positioning block 15 are used for positioning the position of the workpiece 13.

And 2, controlling the gas-liquid pressurizing cylinder 3 to drive the upper die base 7 and the upper die 9 to press downwards by the electromagnetic valve, accelerating the pressing downwards at the beginning, reducing the speed when the upper die 9 is in contact with the workpiece 13 quickly, increasing the output force, and obtaining a pressurizing stroke, wherein when the upper die 9 is in contact with the workpiece 13 and continues to press downwards, the lower die 12 moves downwards due to the stressed compression spring, and meanwhile, the inner side of the rotary die 17 also rotates under the stress, and finally, the display position is formed to meet the requirement.

And 3, after forming, returning the upper die 9, enabling the lower die 12 to eject the workpiece 13 due to the reset of the spring, limiting the reset, enabling the lower die to reach a specified position, simultaneously rotating the die 17 to reset the spring and the ejection pin, retracting the gas-liquid pressure cylinder 3, and taking out the workpiece 13.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a slow down mould of bending of work piece surface indentation which characterized in that includes at least a pair of side form that sets up in opposite directions and form predetermined hollow area, hollow area intra-area clearance fit is equipped with the rotary die who is used for decomposing the work piece atress of bending, the rotary die is through setting up but the gyration of predetermined angle is realized to the top of vertical lift on the side form.

2. The bending die for relieving the surface indentation of the workpiece as claimed in claim 1, wherein: the section of the rotary die comprises an arc section and a step section; the circular arc section is matched with the hollow area of the side die; the stage is two planes which are milled and form 90 degrees with each other, and the joint of the arc section and the stage is subjected to fillet treatment; and a groove with a preset length is milled at the arc section, and the width of the groove is in clearance fit with the diameter of the plug.

3. The bending die for relieving the surface indentation of the workpiece as claimed in claim 1, wherein: the bending die also comprises a lower die base, two vertical guide pillars are mounted on the lower die base, and an upper die base capable of lifting along the vertical direction is sleeved on each guide pillar; the upper die holder and the lower die holder are parallel to each other; the lower die is fixed at the center of the lower die base.

4. The bending die for relieving the surface indentation of the workpiece according to claim 3, wherein: the side dies are fixed on two sides of the lower die close to the guide post; guide blocks are fixed on two sides of the upper part of the side die, a movable positioning block is arranged on the upper part of the lower die and between the two side dies, and a workpiece to be machined is clamped between the two guide blocks; an upper die is fixed at the lower part of the upper die holder; when the upper die is pressed down, the upper die is directly contacted with a workpiece and bent and formed.

5. The bending die for relieving the surface indentation of the workpiece according to claim 3, wherein: and a non-indentation polyurethane pad or a protective film is placed at the lower die.

6. The bending die for relieving the surface indentation of the workpiece according to claim 3, wherein: through holes are formed in the two sides of the upper die holder in a penetrating mode, and linear bearings are installed in the through holes in an interference fit mode; the linear bearing is in transition fit and sleeved on the guide pillar.