CN114589250A

CN114589250A - Die punching process and die for flanging connecting piece

Info

Publication number: CN114589250A
Application number: CN202210196577.9A
Authority: CN
Inventors: 曹雅琴
Original assignee: Guangzhou Sunnyway Metal Products Co ltd
Current assignee: Guangzhou Sunnyway Metal Products Co ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-06-07
Anticipated expiration: 2042-03-02
Also published as: CN114589250B

Abstract

The invention relates to a die technology of a flanging connecting piece and a die thereof, which adopt the working procedures of flanging firstly and punching secondly, solve the problem that the existing flanging punching can cause the deformation of punching holes, simultaneously, the two ends of a machined piece are positioned at the same horizontal height by bending and inclining the machined piece upwards, solve the problem that the technologies of punching holes and flanging of bent parts need to use side push dies, reduce the working procedures and the processing cost, simultaneously, through die punching firstly at the corner part, the problem of material piling at the corner part can be solved, simultaneously, the tonnage required by flanging is also reduced, the complexity of the die is reduced, the service life of the die is prolonged, and the maintenance cost of the die is reduced.

Description

Die punching process and die for flanging connecting piece

Technical Field

The invention relates to the technical field of die machining, in particular to a die punching process of a flanging connecting piece and a die thereof.

Background

In the current course of working, to the right angle connecting piece, can adopt the design of turn-ups technology usually, strengthen the intensity and the life of product, adopt following two kinds of process thinking in the current course of working usually:

as shown in fig. 1, the plate is trimmed, the trimmed plate is punched, after the punching, both sides of the plate need to be completely flanged, then the flanged connecting member is bent and formed, and finally the bent part is subjected to flash processing. With this process, the problems to be faced are: 1: the processing sequence of firstly punching an inner hole and then flanging is easy to cause larger deformation to the inner hole, if a small hole is firstly pre-punched, and then fine punching is carried out after flanging is finished, the number of process steps is increased, the length of the die is lengthened, the accumulated error is increased, and the manufacturing difficulty of the die is improved; 2: the integral product is firstly flanged and then bent and formed, so that stacking at the flanged corner is very serious, the product is formed unstably, flaws exist in the appearance of the product, and if the stacking problem is solved by digging the material, multiple attempts are needed, and the cost of the die is increased; 3: because the material is buckled fashioned in the in-process again, both sides edge has been turned over the edge and has been handled, consequently need strengthen the die strength and strengthen the internal stress that bordures and bring, still need promote the punching press tonnage simultaneously, cause the promotion of cost, and the bending process after the turn-ups was gone through simultaneously, the deformation of its resilience also can be very big, needs follow-up to carry out many times plastic, has increased the enterprise cost equally.

As shown in fig. 2, in order to solve the above-mentioned problems caused by the flanging-bending process, another process is as follows: the first looks is cut edge on panel, divide into straight part and bending portion with the connecting piece according to the demand at the in-process of cutting edge, at first carries out the turn-ups with the both sides of straight portion, and does not carry out the turn-ups to the kink, and the second step is with the kink shaping of buckling downwards, and the third step is carried out the turn-ups with the kink both sides, and the fourth step punches a hole respectively with the straight portion and the kink of connecting piece, carries out the overlap processing to the part that finishes that punches a hole at last. By adopting the processing steps, the problems that punching deformation is easily caused by flanging after punching and stacking at a bent part is serious in the process steps can be solved. However, the following problems still exist in the process steps: 1: when the first flanging is carried out, only the straight part is flanged, so that the material at the bent part is easily dragged by a forming die, and the deviation occurs in the subsequent bending process, so that the left and right flanging of the second flanging are different in height and unstable in size; 2: meanwhile, the second flanging molding is performed in a side-pushing mode, the molding force is far greater than that of the molding performed by the punch in the up-down direction, the requirements of a side-pushing process on the strength of the die and the strength of the scraper knife are high, the cost of the die is increased, the scraper knife is easy to wear, and the maintenance cost is increased; 3: in order to ensure the position accuracy of the inner hole on the product, the punching on the bent part must be performed in a side punching mode, for example, in an upper side flanging pushing mode (please refer to fig. 3), because the scraper knife needs to be made into a large block to ensure the strength, two positions need to occupy 4 steps, and the length of the die is greatly increased.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a die punching process and a die of a flanging connecting piece, and solves the problems that the bending part is seriously piled and the flanging can cause hole site deformation in the processing process of the existing flanging connecting piece.

The technical purpose of the invention is realized by the following technical scheme: a die stamping process of a flanging connecting piece comprises the following steps:

s1: the method comprises the following steps of performing trimming processing on a metal plate, cutting a profile of a material connecting piece and profiles of a plurality of machined pieces on the metal plate, wherein one ends of the plurality of machined pieces are fixedly connected with the material connecting piece, and the plurality of machined pieces are mutually separated;

s2: bending and forming the other end of the workpiece to form a straight part and a bent part of the workpiece;

s3: bending the bent and formed workpiece upwards along the connection position between the workpiece and the connecting piece, so that one end of the workpiece and the other end of the workpiece are positioned at the same horizontal height;

s4: placing the workpiece bent upwards on a lower die head;

s5: pressing the workpiece on the lower die head by using a material pressing block, and extending the regions to be flanged on two sides of the workpiece to the outer side of the material pressing block;

s6: the clamping plates positioned on the two sides of the material pressing block move downwards so that the flanging areas on the two sides of the workpiece are flanged downwards under the action of the clamping plates;

s7: the clamping plate descends to the lowest point, namely after the height of the inner surface of the clamping plate is 2mm lower than the height of the upper surface of the workpiece, the clamping plate starts to move upwards and returns to the initial position;

s8: after the clamping plate returns to the initial position, the material pressing block moves upwards, and the workpiece falls off from the lower die head.

Optionally, in step S7, in the case that the clamping plate descends to the lowest point and the material pressing block is kept still; and the punching device goes down and penetrates through the through hole in the material pressing block to punch the straight part and the bent part.

The application also provides a die stamping die of the die stamping process of the flanging connecting piece, which comprises the following steps: the device comprises a lower die head for positioning a workpiece, a material pressing block for pressing the workpiece on the lower die head, a first clamping plate for flanging the edge of one side of the workpiece, and a second clamping plate for flanging the edge of the other side of the workpiece; the top of the lower die head is provided with a die holder matched with the shape of a workpiece, and the top of the die holder is provided with a first inclined plane for placing a straight part of the workpiece and a second inclined plane for placing a bent part of the workpiece; the bottom of the material pressing block is provided with a pressing groove corresponding to the die holder in shape; a first limiting groove is formed in one side, facing the material pressing block, of the first clamping plate; the top edge of the first limiting groove is provided with a first abutting surface which can abut against a region to be flanged on one side of the workpiece; a second limiting groove is formed in one side, facing the material pressing block, of the second clamping plate; and a second abutting surface which can abut against the region to be flanged on the other side of the workpiece is arranged at the edge of the top of the second limiting groove.

Optionally, the first abutting surface and the second abutting surface are both arc-shaped.

Optionally, the material pressing block is provided with a plurality of positioning holes for punching the workpiece.

In conclusion, the invention has the following beneficial effects: the application provides a die technology of turn-ups connecting piece and mould thereof, adopt the process of punching a hole after turn-ups earlier, the problem that current turn-ups punching press can lead to punching a hole and warp is solved, and simultaneously, through upwards buckling the slope with the machined part, make the both ends of machined part be located same level, the problem that processes such as the punching a hole to the kink need use the side to push away the mould is solved, the process has been reduced, the processing cost is reduced, simultaneously through the earlier die to turning corner position, can solve the windrow problem of turning position, the required tonnage of turn-ups has also been reduced simultaneously, the complexity of mould is reduced, reinforcing mould life, the maintenance cost of mould is reduced.

Drawings

FIG. 1 is a schematic view of a first prior art processing sequence;

FIG. 2 is a schematic view of a second prior art processing sequence;

FIG. 3 is a schematic diagram of a prior art shock measurement approach;

FIG. 4 is a schematic view of a connector processing sequence of the present invention;

FIG. 5 is a schematic view of the flanging die of the present invention;

FIG. 6 is a first angle exploded view of the die of the flanging die of the present invention;

FIG. 7 is a second angle exploded view of the flanging die of the present invention;

in the figure: 1. a straight portion; 2. a bending section; 3. flanging; 4. punching; 5. a scraper knife; 6. laterally pushing the sliding block; 7. pressing a plate; 8. forming a tool; 9. a lower die head; 91. a first inclined surface; 92. a second inclined surface; 10. pressing blocks; 101. pressing a groove; 102. positioning holes; 11. a first splint; 111. a first limit groove; 112. a first abutting surface; 12. a second splint; 121. a second limit groove; 122. a second abutting surface; 13. connecting the material parts; 14. and (5) processing the workpiece.

Detailed Description

In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for descriptive purposes only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, configuration, and operation, and therefore should not be construed as limiting the present invention.

The invention is described in detail below with reference to the figures and examples.

Referring to fig. 4, the invention provides a die stamping process of a flanging 3 connecting piece, which comprises the following steps:

s1: referring to fig. 4, a metal plate is subjected to an edge cutting process, and a profile of a connecting member 13 and a profile of a plurality of workpieces 14 are cut out from the metal plate, wherein the connecting member 13 is used for keeping a fixed distance between the workpieces 14 so as to facilitate stamping of a die, one ends of the workpieces 14 are fixedly connected to the connecting member 13, and the workpieces 14 are separated from each other, in this embodiment, although the workpieces 14 are fixedly connected to the connecting member 13, the metal plate has ductility, and thus the fixed connection in this step does not conflict with bending in a subsequent step;

s2: the method mainly aims to solve the problem of corner stacking of a right-angle flanging 3 connecting piece, so that the other end of a machined piece 14 is bent and formed to enable the machined piece 14 to form a straight part 1 and a bent part 2, wherein the straight part 1 is in a plane relative to the original metal plate, and the bent part 2 is perpendicular to the plane of the metal plate after being bent;

s3: in current course of working, if carry out turn-ups 3 to being the right angled connecting piece, need fall into two steps, carry out punching press turn-ups 3 to straight portion 1 earlier, then carry out punching press turn-ups 3 to kink 2 again, can increase the step like this and cause mould length process, on the other hand when carrying out the punching press to kink 2, need adopt the mode that the side pushed, need bigger tonnage to push away slider 6 to the side, improve the cost of enterprise. The application provides a processing mode, a bent and formed processing piece 14 is bent upwards along the connection position between the processing piece 14 and a connecting piece 13, so that one end of the processing piece 14 and the other end of the processing piece 14 are positioned at the same horizontal height; the mode that can adopt vertical punching press like this handles straight portion 1 and kink 2 turn-ups 3 simultaneously at the in-process of punching press, two aforementioned technical problem that solve have also simplified the complexity of mould simultaneously, have reduced the maintenance cost of mould.

S4: placing the workpiece 14 bent upwards on the lower die head 9;

s5: pressing the workpiece 14 on the lower die head 9 by using a material pressing block 10, and simultaneously extending the regions to be flanged 3 on two sides of the workpiece 14 to the outer side of the material pressing block 10;

s6: the clamping plates on the two sides of the material pressing block 10 move downwards, so that the flanging 3 areas on the two sides of the workpiece 14 are downwards flanged 3 under the action of the clamping plates;

s7: after the clamp plate descends to the lowest point, namely the height of the inner surface of the clamp plate is 2mm lower than that of the upper surface of the workpiece 14, the clamp plate starts to move upwards and returns to the initial position; in the steps S4-S6, mainly, the clamping plates on the two sides of the swaging block 10 are used to perform the flanging 3 processing on the two side edges of the workpiece 14, and after the workpiece 14 is bent upward, the corner position of the workpiece 14 located at the highest point can be firstly abutted against the inner surface of the clamping plate, and the corners of the two side flanging 3 are seriously stacked, so when the planes on the two sides of the clamping plate are not attached to the material surface, the inner corners of the clamping plate firstly form the material wrap angle, so as to alleviate the stress concentration phenomenon caused by stacking, and prevent the two side flanging 3 from being formed unevenly due to wrap angle.

S8: after the clamping plate returns to the initial position, the swage block 10 moves upward, and the workpiece 14 is released from the lower die 9.

In the conventional process, a machining step of punching 4 and then flanging 3 is adopted, and deformation of the punched hole 4 is easily caused to exceed tolerance in the flanging 3 process, so in order to solve the problem, further, the steps provided in the present application are to firstly machine the flanged edge 3 to the workpiece 14, that is, to punch 4 the straight part 1 and the bent part 2 after the flanged edge 3 is machined, namely, under the condition that the clamping plate descends to the lowest point and the material pressing block 10 keeps motionless, that is, the clamping plate descends the device of the punched hole 4, and penetrates through the positioning hole 102 on the material pressing block 10 to punch 4 the straight part 1 and the bent part 2, so that the position of the workpiece 14 is kept unchanged by utilizing the pressing action of the clamping plate and the material pressing block 10, and then the workpiece 14 is punched 4 through the positioning hole 102, so that the precision of the punched hole 4 is ensured.

Further, referring to fig. 5-7, the present application also provides a mold for the above-mentioned stamping process, including: a lower die head 9 for positioning a workpiece 14, a material pressing block 10 for pressing the workpiece 14 on the lower die head 9, a first clamping plate 11 for flanging 3 one side edge of the workpiece 14, and a second clamping plate 12 for flanging 3 the other side edge of the workpiece 14; the top of the lower die head 9 is provided with a die holder matched with the shape of the workpiece 14, and the top of the die holder is provided with a first inclined surface 91 for placing the straight part 1 of the workpiece 14 and a second inclined surface 92 for placing the bent part 2 of the workpiece 14; the bottom of the material pressing block 10 is provided with a pressing groove 101 corresponding to the die holder in shape; a first limiting groove 111 is formed in one side, facing the material pressing block 10, of the first clamping plate 11; the top edge of the first limiting groove 111 is provided with a first abutting surface 112 which can abut against the region to be flanged 3 on one side of the workpiece 14; a second limiting groove 121 is formed in one side, facing the material pressing block 10, of the second clamping plate 12; the top edge of the second limiting groove 121 is provided with a second abutting surface 122 which can abut against the region to be flanged 3 on the other side of the workpiece 14.

Specifically, the die holder on the lower die head 9 is used for placing the workpiece 14, after the workpiece 14 is bent to 90 °, the workpiece 14 and the connecting member 13 are bent upward, and two end points of the workpiece 14 in a right angle are located on the same horizontal line, so that two partial flanging 3 regions can be flanged 3 in a downward pressing manner, and the need of performing flanging 3 in a side pushing manner is avoided, the die holder on the lower die head 9 is adapted to the angle and shape of the workpiece 14 in an inclined state, and after the workpiece 14 is placed on the die holder, the pressing block 10 moves downward under the control of an upper hydraulic device, so as to press the workpiece 14 on the die holder. After the workpiece 14 is pressed by the pressing block 10, the clamping plates on the two sides move downwards under the control of the driving device, and the flanging 3 is processed on the flanging area.

Further, the first abutting surface 112 and the second abutting surface 122 are both arc-shaped according to the shape of the flange 3. The transition part between the first abutting surface 112 and the second abutting surface 122 is the corner position of the flanging 3 of the workpiece 14, and in the process of pressing the clamping plate, the corner position of the workpiece 14 is firstly abutted against the abutting surface of the clamping plate, so that the problems of uneven corners and easiness in stacking in the traditional process of firstly flanging 3 and then bending are solved.

Furthermore, in order to facilitate the punching 4 of the machined part 14 which is flanged 3 and ensure the precision of the punching 4, the material pressing block 10 is provided with a plurality of positioning holes 102 for punching 4 of the machined part 14, after the machined part 14 is flanged, the material pressing block 10 and the clamping plate can be kept unmoved, the machined part 14 is punched 4, and hole positions on two different surfaces can be machined by one-time punching 4, so that the process steps are saved.

In conclusion, the processing sequence is adjusted, the process of flanging 3 first and then punching 4 is adopted, the problem that the punching 4 is deformed due to the existing flanging 3 punching is solved, meanwhile, the workpiece 14 is bent upwards and inclined, so that the two ends of the workpiece 14 are positioned at the same horizontal height, the problem that the side push dies are needed in the processes of punching 4 and flanging 3 of the bent part 2 is solved, the process is reduced, the processing cost is reduced, meanwhile, the die is firstly punched at the corner part, the problem of material piling at the corner position can be solved, the tonnage needed by the flanging 3 is reduced, the complexity of the die is reduced, the service life of the die is prolonged, and the maintenance cost is reduced.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The die technology of the flanging connecting piece is characterized by comprising the following steps: the method comprises the following steps:

s4: placing the workpiece bent upwards on a lower die head;

2. The die process of the flanging connector in accordance with claim 1, wherein in the step S7, under the condition that the clamping plate descends to the lowest point and the material pressing block is kept still; and the punching device goes down and penetrates through the positioning hole in the material pressing block to punch the straight part and the bent part.

3. A die for the die process of the burring connecting piece according to claim 1, comprising: the device comprises a lower die head for positioning a workpiece, a material pressing block for pressing the workpiece on the lower die head, a first clamping plate for flanging the edge of one side of the workpiece, and a second clamping plate for flanging the edge of the other side of the workpiece;

the top of the lower die head is provided with a die holder matched with the shape of a workpiece, and the top of the die holder is provided with a first inclined plane for placing a straight part of the workpiece and a second inclined plane for placing a bent part of the workpiece;

the bottom of the material pressing block is provided with a pressing groove corresponding to the die holder in shape;

a first limiting groove is formed in one side, facing the material pressing block, of the first clamping plate; the top edge of the first limiting groove is provided with a first abutting surface which can abut against a region to be flanged on one side of the workpiece;

a second limiting groove is formed in one side, facing the material pressing block, of the second clamping plate; and a second abutting surface which can abut against the region to be flanged on the other side of the workpiece is arranged at the edge of the top of the second limiting groove.

4. The die for punching a flange connector according to claim 3, wherein the first abutting surface and the second abutting surface are both arc-shaped.

5. The die for punching the flanging connector according to claim 4, wherein the material pressing block is provided with a plurality of positioning holes for punching a workpiece.