CN112453207A

CN112453207A - Flanging die

Info

Publication number: CN112453207A
Application number: CN201910844542.XA
Authority: CN
Inventors: 王艳敏; 孙洪宾; 常霞; 张寅喆; 魏文勇; 穆林; 冯航; 杨会杰
Original assignee: Henan Senyuan Electric Co Ltd
Current assignee: Henan Senyuan Electric Co Ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2021-03-09

Abstract

The invention relates to a flanging die. The turn-ups mould includes: the device comprises an upper die and a lower die, wherein one of the upper die and the lower die is a male die, and the other one of the upper die and the lower die is a female die; the female die is provided with a female die hole extending up and down, the front end of the female die is provided with a flanging supporting edge positioned at the female die hole, and the flanging supporting edge is used for supporting materials in the direction of the male die to be flanged; the outer ring of the front end of the male die is sleeved with a blank pressing structure, the blank pressing structure is provided with a blank pressing surface used for pressing materials on a blank pressing supporting edge, and the male die and the blank pressing structure can move relatively in the vertical direction; the outer side of the front end of the male die is provided with an annular outer cutting edge, the inner wall of the female die is provided with an annular cutter which protrudes inwards, the inner side of the front end of the annular cutter is provided with an annular inner cutting edge, the annular inner cutting edge is positioned behind the flanging supporting edge, and a distance which is equal to the height of the flanging is arranged between the annular inner cutting edge and the flanging supporting edge; the outer diameter of the annular outer cutting edge is smaller than the inner diameter of the female die and is matched with the inner diameter of the annular inner cutting edge so as to cut off the flanging of the material at a fixed length.

Description

Flanging die

Technical Field

The invention relates to the technical field of product forming devices, in particular to a flanging die.

Background

At present, the requirement on the product quality is gradually improved, and for products needing flanging, such as a conductive bar and the like, the aperture of an inner hole of the flanging is ensured, and the height size of the flanging is also ensured. At present, a common processing mode is to turn up by using a common flanging die, which generally comprises a male die, a female die and a pressure plate, when in use, a material (such as a conducting bar) which is pre-punched is placed on a groove, so that the male die, the pre-punched hole and the female die correspond to each other, the material is pressed on the female die by the pressure plate, the male die is aligned to the pre-punched hole for punching, and the material is turned up.

However, the flanging die in the prior art cannot control the height and size of the formed flanging, when the height of the flanging is greater than a design value, secondary processing such as cutting, grinding and the like needs to be performed on the flanging, the defects of the secondary processing are greater than that, the processing procedures are increased, the labor amount is increased, the processing time is prolonged, and the secondary processing can bring product defects such as burrs and the like, so that the quality of the product cannot be guaranteed.

Disclosure of Invention

The invention aims to provide a flanging die, which aims to solve the technical problems of high labor intensity and low processing efficiency caused by the fact that materials need to be processed for the second time to ensure the height and the size of a flanging when the flanging die is used for processing in the prior art.

In order to achieve the purpose, the technical scheme of the flanging die is as follows: a flanging die comprises:

the device comprises an upper die and a lower die, wherein one of the upper die and the lower die is a male die, the other one of the upper die and the lower die is a female die, and the male die and the female die both take one end which is mutually inserted as the front end;

the female die is provided with a female die hole extending up and down, the front end of the female die is provided with a flanging supporting edge positioned at the female die hole, and the flanging supporting edge is used for supporting materials in the direction of the male die to be flanged;

the outer ring of the front end of the male die is sleeved with a blank pressing structure, the blank pressing structure is provided with a blank pressing surface used for pressing materials on a blank pressing supporting edge, and the male die and the blank pressing structure can move relatively in the vertical direction;

the outer side of the front end of the male die is provided with an annular outer cutting edge, the inner wall of the female die is provided with an annular cutter which protrudes inwards, the inner side of the front end of the annular cutter is provided with an annular inner cutting edge, the annular inner cutting edge is positioned behind the flanging supporting edge, and a distance which is equal to the height of the flanging is arranged between the annular inner cutting edge and the flanging supporting edge;

the outer diameter of the annular outer cutting edge is smaller than the inner diameter of the female die and is matched with the inner diameter of the annular inner cutting edge so as to cut off the flanging of the material at a fixed length.

The invention has the beneficial effects that: when the flanging die is used, when the male die enters the female die to be flanged, the flanging support edge supports materials, the male die and the flanging support edge are matched to flange the materials, when the male die moves to the position where the annular outer cutting edge is matched with the annular inner cutting edge, the annular outer cutting edge is matched with the annular inner cutting edge to cut off the part, higher than the designed height, of the flanging, and the height of the reserved flanging is equal to the designed height. The flanging die disclosed by the invention can complete flanging by one-time stamping without secondary processing, can ensure the height size and the bore diameter of the flanging, has high processing efficiency, reduces the labor intensity, avoids product defects such as burrs and the like possibly generated in secondary processing due to no secondary processing, and improves the product quality.

Furthermore, the annular cutter is a cylindrical concave mold core arranged in the concave mold hole, and the concave mold core and the concave mold are assembled together in an interference fit mode. The mode of adopting interference fit installs the concave mould core in the die, and the mounting means is simple, is convenient for change.

Further, the die is the lower mould, the hole that the upper and lower extension of female die core includes the straight hole section of top and the taper hole section of below, and the aperture of taper hole section from top to bottom grow gradually to be convenient for the discharge of waste material. The conical section of the concave die core ensures that the cut waste material smoothly falls off, and the waste material is prevented from being accumulated in the concave die core to cause the concave die core to break.

Furthermore, the male die comprises a positioning section located in front of the annular outer cutting edge, the positioning section is used for being inserted into a pre-punching hole of the material in a matching mode, the outer diameter of the positioning section is smaller than the outer diameters of the annular outer cutting edge and the annular inner cutting edge, and the positioning section protrudes forwards from the edge pressing face. The positioning section can be matched with the pre-punched hole in the material, so that the initial positioning of the male die and the material is realized, the accuracy of the position between the male die and the material is ensured, and the flanging precision is improved.

Further, the front end of the positioning section is provided with a tapered guide section with a small front part and a large rear part. When the male die has slight deviation, the positioning section of the male die can be smoothly guided into the pre-punching hole through the conical guide section.

Further, the blank pressing structure is a stripper plate which is assembled in a floating mode relative to the male die and can be pushed forwards by the elastic piece, and the blank pressing surface is formed by the end face, facing the female die, of the stripper plate. The blank pressing structure is a stripper plate, which not only has the function of jacking and pressing materials, but also has the function of jacking the materials on the male die after the punching is finished.

Furthermore, the front end of the female die is protrudingly provided with a positioning pin, the positioning pin is used for being matched with the material horizontal stop to position the material, and the blank pressing structure is provided with an avoiding hole or an avoiding groove for avoiding the positioning pin. After the positioning pin is arranged, the horizontal position of the material can be positioned, and the accuracy of the position between the pre-punching hole and the male die and the female die is ensured.

Further, the flanging supporting edge is an arc-shaped edge in arc transition. The arc edge is convenient for the material to be turned over.

Drawings

FIG. 1 is a sectional schematic view of a front view of a product to be formed in an embodiment of a flanging die of the present invention;

FIG. 2 is a top view of a product to be formed in an embodiment of the flanging die of the present invention;

FIG. 3 is a schematic view of a flanging die of an embodiment of the present invention;

FIG. 4 is a schematic view of the male mold of FIG. 3;

FIG. 5 is a schematic view of the female mold core of FIG. 3;

description of reference numerals: 1-a conductive bar; 2-flanging; 3, mounting a template; 4-a die shank; 5, arranging a base plate; 6-a male die fixing plate; 7-equal-height sleeve; 8-a stripper plate; 9-a female die; 10-lower backing plate; 11-a lower template; 12-a concave mould core; 13-guide post clearance holes; 14-a locating pin; 15-a male die; 16-a guide post; 17-a rubber block; 121-annular inner cutting edge; 151-flanging stamping section; 152-a positioning section; 153-a conical guide section; 154-annular cutting edge.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

The flanging die disclosed by the invention can realize flanging of the inner hole of the product, can ensure that the height of the flanging is the same as the designed height, does not need secondary processing such as cutting, grinding and the like, reduces the processing procedures, improves the processing efficiency, reduces the labor intensity and can ensure the quality of the product. One embodiment of the flanging die is shown in fig. 1 to 5.

In this embodiment, the product shown in fig. 1 and 2 is taken as an example for explanation, as shown in fig. 1 and 2, the product in this embodiment is a conductive bar 1, an inner hole is formed on the conductive bar 1, a flange 2 is arranged at the inner hole, the flange 2 is in arc transition connection with the conductive bar 1, and when the conductive bar 1 is formed, the size to be ensured is the inner hole aperture of the flange 2 and the overall height H of the flange 2.

The structure of the flanging die is shown in fig. 3 to 5, core components of the flanging die are a male die 15, a female die 9 and a female die core 12, and the rest structures are components adapted to realize relative movement of the male die 15, the female die 9 and the female die core 12, in this embodiment, ends of the male die 15 and the female die 9, which are mutually inserted and matched, are defined as respective front ends (the front-back direction in this embodiment is the up-down direction shown in fig. 3). The structure of the male die 15 is as shown in fig. 4, the male die 15 includes a flanging stamping section 151, a positioning section 152 and a tapered guide section 153, which are sequentially arranged from back to front, wherein the flanging stamping section 151 and the positioning section 152 are equal-diameter straight sections, the outer diameter of the flanging stamping section 151 is greater than that of the positioning section 152, and the tapered guide section 153 is a tapered section whose outer diameter gradually decreases from back to front. The front end annular outer edge of the flanging stamping section 151 is an annular outer cutting edge 154.

The female die 9 is a conventional female die, a female die hole extending forwards and backwards is formed in the female die 9, the female die core 12 is fixed in the female die hole, the structure of the female die core 12 is shown in fig. 5, the female die core 12 is a cylinder body with two through ends, the outer diameter of the female die core 12 is matched with the inner diameter of the female die hole of the female die 9 in size, the female die core 12 can be arranged in the female die 9 in a forced interference mode, the inner diameter of the female die core 12 is slightly larger than the outer diameter of a flanging stamping section 151 in the male die 15, an annular inner cutting edge 121 is formed in the front end of the female die core 12, and the annular.

As shown in fig. 3, the burring die integrally includes an upper die portion in which the male die 15 is disposed and a lower die portion in which the female die 9 and the female die core 12 are disposed. In this embodiment, the upper die part comprises a die shank 4, an upper die plate 3, an upper backing plate 5 and a punch retainer 6 which are sequentially fixed and connected from top to bottom, wherein the punch 15 is installed in the punch retainer 6, the specific mode is the prior art, and the punch 15 is fixed by the aid of the top of the punch retainer 6 and the downward pressing of the upper backing plate 5. Arrange stripper 8 in punch plate 6's below interval, be fixed with block rubber 17 between stripper 8 and punch plate 6, realize the floating of stripper 8 and arrange, block rubber 17 has formed the elastic component, can adopt spring isotructure in other embodiments. A fixing hole is processed on the punch retainer 6, the rubber block 17 is installed in the fixing hole, and the rubber block 17 has a certain pre-compression amount when being installed and is elastically pressed between the discharging plate 8 and the punch retainer 6. The rubber block 17 is actually a material returning device and pushes the stripper plate 8 to push away the workpiece sleeved on the male die. In this embodiment, in order to ensure that the discharging plate 8 integrally maintains a horizontal state, a plurality of equal-height sleeves 7 are fixed on the discharging plate 8, the equal-height sleeves 7 are actually equal-height screws, lower end rod parts of the equal-height screws sequentially penetrate through the upper template 3, the upper padding plate 5 and the male die fixing plate 6 from top to bottom and are fixed on the discharging plate 8 in a threaded manner, the levelness of the discharging plate 8 can be adjusted by adjusting the heights of the equal-height screws, and the discharging plate 8 can be ensured to be pressed on the conductive bar in a fitting manner. The equal-height screws are movably arranged in the parts in a penetrating way and can move up and down along with the stripper plate 8. The equal-height sleeves 7 and the discharging plate 8 form a discharging device together, and the discharging device in the embodiment plays a role in pressing materials and pushing away a workpiece sleeved on the male die.

After the upper die part is assembled, the male die 15 is movably penetrated out of the stripper plate 8, and the front end of the male die 15 is arranged to protrude forward from the stripper plate 8.

The structure of the lower die part is shown in fig. 3, the lower die part comprises a lower die plate 11, a lower backing plate 10 and a female die 9 which are fixedly connected from bottom to top in sequence, wherein a female die core 12 is forcibly installed in the female die 9, the front end of the female die core 12 is positioned behind the front end of the female die 9, and the distance between the front end surface of the female die 9 and the front end surface of the female die core 12 is H.

In this embodiment, the hole edge at the front end of the cavity hole in the cavity 9 is a flanging supporting edge, and the flanging supporting edge is chamfered to form an arc edge, so that the conducting bar can be conveniently flanged. Of course, in other embodiments, the curved edge may be eliminated, and a right angle transition may be used.

In this embodiment, in order to ensure the accuracy of the relative movement of the upper and lower mold portions, guide posts 16 are provided in the upper mold portion and guide holes are provided in the lower mold portion, while in order to prevent the ends of the guide posts 16 from colliding with the guide posts 16, guide post clearance holes 13 are provided in the lower bolster plate 10. In this embodiment, as shown in fig. 3, in order to position the conductive bar conveniently, a positioning pin 14 is fixed at the front end of the female die 9, the front end of the positioning pin 14 protrudes forward from the female die 9, and the positioning pin 14 can be in blocking fit with the conductive bar in the horizontal direction to realize positioning. In order to avoid the influence of the positioning pin 14 on the discharging plate 8, an avoiding hole is formed in the discharging plate 8, and of course, in other embodiments, an avoiding groove may be formed in the discharging plate.

In this embodiment, the wall thickness of the female mold core 12 is the same as the thickness of the conductive bar 1, so that the vertical extension of the flange can be ensured by the matching of the inner wall of the female mold and the outer wall of the male mold.

The use process of the invention is as follows: in the initial state, the upper mold part and the lower mold part are separated, the electric conduction is arranged on the female mold, and the two sides and one end of the electric conduction bar are blocked and positioned with the corresponding positioning pin 14. Then, the upper die part descends, in the descending process, the conical guide section 153 and the positioning section 152 sequentially enter the pre-punched hole of the conductive bar, then the flanging stamping section 151 moves downwards against the inner edge of the pre-punched hole and is matched with the flanging supporting edge of the female die to realize flanging, the male die continues to move, and when the annular outer cutting edge 154 and the annular inner cutting edge 121 are matched with each other, the redundant part in the flanging is cut off. During the descent of the upper mould part, the rubber block 17 is compressed and the punch moves downwards relative to the stripper plate 8. After the flanging is finished, the upper die part moves upwards, and the stripper plate 8 pushes the workpiece on the male die downwards.

In this embodiment, the stripper has played the effect that compresses tightly electrically conductive row, and has formed the blank holder structure, and the preceding terminal surface of stripper has constituted the blank holder face, and the stripper has played the effect of unloading simultaneously. In other embodiments, the edge pressing structure may be a material pressing plate or a material pressing block, and when performing the punching and flanging, the material pressing plate or the material pressing block is firstly pressed against the material, and then the male die penetrates through the material pressing plate or the material pressing block. And regarding the unloading part, the mode can be adopted, the male die still penetrates out of the edge pressing structure, when the stamping and flanging of the male die are completed and goes upwards, the male die is hit by the upper striking rod before the workpiece on the male die is not contacted with the edge pressing structure, and thus the unloading is completed.

In this embodiment, the hole of concave mold core actually includes two sections, including the straight hole section of top and the taper hole section of below, and the aperture of taper hole section from top to bottom grow gradually, makes things convenient for the waste material to whereabouts, prevents that the waste material from piling up in concave mold core and leading to concave mold core to break.

In this embodiment, can fix a position the horizontal position of terrace die through setting up location section and toper guide segment, in other embodiments, can remove the toper guide segment, perhaps can remove location section and toper guide segment all.

In the embodiment, the concave mold core forms the annular cutter, the annular cutter is detachably arranged in the concave mold, in other embodiments, the annular cutter can be integrally formed in the concave mold, and the vertical extension length of the annular cutter can be reduced.

In this embodiment the male mould is located in the upper mould part and is the upper mould and the female mould is located in the lower mould part and is the lower mould, in other embodiments the positions of the male and female moulds may be interchanged.

In the above embodiments, the conductive bar is taken as an example for explanation, and the number of the die holes in the male die and the female die is determined according to the number of the required flanging.

In this embodiment, the male die and the female die are assembled by using a standard die module, which aims to ensure that the relative positions and movements of the male die and the female die are accurate.

Claims

1. A flanging die comprises:

the die is characterized in that an annular outer cutting edge is arranged on the outer side of the front end of the male die, an annular cutter is arranged on the inner wall of the female die in a manner of protruding inwards, an annular inner cutting edge is arranged on the inner side of the front end of the annular cutter and is positioned behind the flanging supporting edge, and a distance equal to the height of the flanging is formed between the annular inner cutting edge and the flanging supporting edge;

2. The flanging die of claim 1, wherein the annular cutter is a cylindrical female die core arranged in the female die hole, and the female die core and the female die are in interference fit together.

3. The flanging die of claim 2, wherein the female die is a lower die, the vertically extending inner hole of the female die core comprises an upper straight hole section and a lower conical hole section, and the aperture of the conical hole section is gradually increased from top to bottom so as to facilitate the discharge of waste materials.

4. The flanging die of claim 1, 2 or 3, wherein the male die comprises a positioning section located in front of the annular outer cutting edge, the positioning section is used for being inserted into the pre-punched hole of the material in a matching mode, the outer diameter of the positioning section is smaller than that of the annular outer cutting edge and that of the annular inner cutting edge, and the positioning section is arranged to protrude forwards from the edge pressing face.

5. The flanging die of claim 4, wherein the front end of the positioning section is provided with a tapered guide section with a small front end and a large rear end.

6. The flanging die of claim 1, 2 or 3, wherein the edge pressing structure is a stripper plate which is assembled in a floating manner relative to the male die and can be pushed forward by the elastic member, and an end face of the stripper plate facing the female die forms the edge pressing face.

7. The flanging die of claim 1, 2 or 3, wherein a positioning pin is protrusively arranged at the front end of the female die and used for being matched with the material horizontal stop to position the material, and an avoiding hole or an avoiding groove for avoiding the positioning pin is formed in the edge pressing structure.

8. The flanging die of claim 1, 2 or 3, wherein the flanging supporting edge is an arc-shaped edge in arc transition.