CN112676433B - Round angle cutting die without overlapping edge - Google Patents

Abstract

The invention discloses a lapping-free fillet cutting die, which is characterized in that: the round corners on one adjacent side of two adjacent blanks are cut off simultaneously; the die comprises a round angle male die and a round angle female die; the guide nail can be inserted into the hole on the blank to separate two adjacent blanks by a certain distance. The blank of the station is separated by a certain distance to meet the requirement of punching the round corners on solving the problem of round corner punching at two ends.

Description

Round angle cutting die without overlapping edge

Technical Field

The invention relates to the technical field of stamping, in particular to a non-overlap fillet cutting die.

Background

As shown in fig. 1 and 2, the L-shaped bracket product is a commonly used product in a wide range of applications, particularly in the automotive industry. The precision grade of the general L-shaped bracket product is T12, and the L-shaped bracket product belongs to a part with low precision requirements and has low size technical requirements. The product is also subjected to superplastic and paint treatments.

As shown in fig. 3, in the prior art, after the product is rounded, because the rounded corner is smaller, there is a process sharp corner near the cut, and there is a potential safety hazard.

As shown in fig. 4 and 5, the conventional pattern is formed by staggering square holes and round holes of adjacent parts, and the arrangement space between the adjacent parts is large, and the procedures comprise square hole punching, round hole punching, groove punching, pre-bending, rib bending and cutting. Thus, the wider lapping edge is adopted, and the material utilization rate is low. The product yield is large, and the annual output value is over 600 ten thousand. 67.2 tons of scrap due to scrap are produced annually.

The overlap of each product of original stock layout needs more than one time of the thickness of the material, and waste materials of six products can be increased by one product, so that the waste materials are extremely wasted.

Disclosure of Invention

Aiming at the problems existing in the background technology, the invention aims to provide the continuous mould without the lapping edge, which has low material utilization rate and can well solve the problem of sharp corners of the round corner generating process.

In order to achieve the above purpose, the continuous mold without overlapping edge designed by the invention is characterized in that: the device is used for stamping and forming an L-shaped bracket with a round corner, and comprises a punching die, a cutting die, a round corner cutting die and a bending die which are sequentially arranged along the feeding direction.

Preferably, the punching die is used for punching and forming one round hole and two square holes on the blank, and all the punched round holes are on the same straight line.

Preferably, the cutting die comprises a cutting male die and a cutting female die, and a plurality of ejector blocks are arranged on the cutting female die at intervals; the upper part of each ejector block is provided with a cutting male die, and the lower part of each ejector block is provided with a floating structure for resetting the ejector block.

Further preferably, the floating mechanism comprises a material ejection rod connected with the bottom of the material ejection block, and a first spring used for ejecting and resetting the material ejection rod.

Still more preferably, a spigot is arranged between the ejector rod and the cutting die. Can support echelonment with the liftout pole, so can realize tang cooperation, can restrict the ascending stroke of liftout pole like this, so accurate will cut the part and reset.

Preferably, the round corner cutting die cuts round corners on one side adjacent to two adjacent blanks at the same time; the die comprises a round angle male die and a round angle female die; the guide nail can be inserted into the hole on the blank to separate two adjacent blanks by a certain distance.

It is further preferred that the distance between two adjacent blanks is less than 2mm.

Further preferably, the distance from the end face of the pilot pin to the surface of the blank is smaller than the distance from the end face of the male die to the surface of the blank.

Further preferably, the distance between the holes in the blank into which adjacent guide pins are inserted is smaller than the distance between adjacent guide pins inserted into the holes in the feeding direction.

Still further preferably, the guiding nails comprise round guiding nails used for guiding and positioning round holes of the blanks and square guiding nails used for guiding and positioning one square hole of the blanks.

Preferably, the bending die comprises a bending rib pressing male die and a bending rib pressing female die which are used for directly forming the blank; the end face of the bending rib pressing male die is V-shaped, and a groove for opening the rib pressing is formed; the bending rib pressing female die is matched with the bending rib pressing male die.

In order to prevent the molded part from jumping and rotating after being bent, which causes the molded part to be unable to be pushed out normally, a device for controlling the molded part to prevent jumping and rotating is designed. Still further preferably, the device further comprises a jumping prevention device, which comprises fixing seats positioned at two ends of the blank; each fixed seat is provided with a swinging rod; one end of the swinging rod is connected with the fixed seat in a swinging way, and the other end of the swinging rod is fixedly connected with the anti-bouncing board.

Still further preferably, the anti-bouncing plate is fixed to an end portion of the swinging rod by a pressing plate.

Still further preferably, the width of the anti-skip plate is equal to the product of the individual part width and the out-mold number.

Between the round angle cutting step and the bending step, the round angle cutting step distance is larger than the normal step distance, and the round angle cutting step distance cannot be completely reset when entering the bending and rib pressing step, so that two reset devices are respectively arranged at two sides between the two steps. As a preferable scheme, the reset device comprises an elastic reset rod and a striker plate; the distance between the elastic reset rod and the striker plate is the product of the width of a single part and the modulus.

Preferably, the elastic reset rod comprises a reset rod abutting against the round corner of the blank and a reset spring abutting against the reset rod.

As a preferable scheme, the punching die, the cutting die and the round angle cutting die are respectively provided with a material guide plate at two ends of the blank; the stock guide plate is provided with a stock guide groove for accommodating blanks.

The invention relates to a continuous stamping method without overlapping edges, which comprises the following steps:

s1, punching holes required by parts on blanks according to part design requirements;

s2, cutting off the blank according to the design width of the part;

s3, chamfering the blank according to the design requirement of the part;

s4, bending the blank to form a rib according to the design requirement of the part;

s5, discharging.

Preferably, in S1, the parts are punched in the same direction.

Preferably, in S2, after the blank is cut, the cut blank is reset so that the blanks at the same station are on the same plane.

Preferably, in S3, the cut adjacent blanks are separated by a distance, and then rounded.

Further preferably, the separation distance is less than 2mm.

Preferably, in S4, the blank is reset first, and after eliminating the separation distance in S3, the bending and rib pressing are performed.

The invention optimizes the parts from the layout to the mould, and focuses on how to feed materials well under the condition of separating the parts from the carrier, and how to cut round corners at two ends and feed materials in place after the separation.

The invention solves the problems of maximization of material utilization and improvement of efficiency from one die to two parts to one die to four parts. The blank of the station is separated by a certain distance to meet the requirement of punching the round corners on solving the problem of round corner punching at two ends.

The invention completes four products from the material utilization rate to the continuous die mechanism through punching, cutting, vacancy separation, blank rounding, reset bending and rib pressing. The efficiency is high, and no overlapping edge exists.

The bending and rib pressing station provided by the invention can complete the process in one step, and the anti-jumping device is provided for preventing the well pressed products from jumping or jumping during bending and pushing, so that the products can be smoothly sent out.

Drawings

Figures 1 and 2 show the L-shaped stent to be manufactured,

figure 3 is a graphical representation of the sharp corners present in the prior art process,

FIGS. 4 and 5 are schematic diagrams of prior art arrangements;

figure 6 is a schematic perspective view of a no-overlap progressive die of the invention,

figure 7 is a schematic front view of the no-overlap progressive die of the invention,

FIG. 8 is a schematic top view of a no-overlap progressive die of the present invention;

FIG. 9 is a schematic cross-sectional view of a cutoff die of the present invention;

FIG. 10 is a schematic perspective view of a radiused die of the present invention;

FIG. 11 is a schematic perspective view of a bending die of the present invention;

FIG. 12 is a schematic perspective view of the anti-bouncing device of the present invention;

FIG. 13 is a schematic perspective view of a reset device of the present invention;

FIGS. 14 and 15 are schematic illustrations of a continuous stamping process without overlapping edges in accordance with the present invention;

FIG. 16 is a partial schematic view of a blank at a filleted corner in accordance with the present invention.

In the figure: 1. punching a die; 2. cutting off the die; 2.1, cutting off the male die; 2.2, cutting off the female die; 2.3, jacking blocks; 2.4, floating structure; 2.5, jacking rod; 2.6, a first spring; 2.7, a spigot; 3. cutting a fillet die; 3.1, a round angle cutting male die; 3.2, cutting a round angle female die; 3.3, guiding the nail; 3.4, a round guide pin; 3.5, square guide nails; 4. bending a die; 4.1, bending and rib pressing male dies; 4.2, bending the rib pressing female die; 5. blank material; 6. an anti-bouncing device; 6.1, fixing base; 6.2, swinging rod; 6.3, a springboard is prevented; 6.4, pressing plate; 7. a reset device; 7.1, an elastic reset rod; 7.2, a striker plate; 7.3, a reset rod; 7.4, a return spring; 8. a material guide plate; 8.1, a guide chute.

Detailed Description

The following describes the technical solution of the present invention (including the preferred technical solution) in further detail by way of fig. 6 to 15 and by way of illustrating some alternative embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

As shown in fig. 6 to 15, the continuous die without overlapping edges for press forming an L-shaped bracket with rounded corners includes a punching die 1, a cutting die 2, a corner cutting die 3 and a bending die 4 which are sequentially arranged in the feeding direction.

Preferably, the punching die 1 punches one round hole and two square holes on the blank 5, and all the punched round holes are on a straight line.

Preferably, the cutting die 2 comprises a cutting male die 2.1 and a cutting female die 2.2, and a plurality of ejector blocks 2.3 are arranged on the cutting female die 2.2 at intervals; the upper part of each jacking block 2.3 is provided with a cutting male die 2.1, and the lower part is provided with a floating structure 2.4 for resetting the jacking block 2.3.

Further preferably, the floating mechanism comprises a jacking rod 2.5 connected with the bottom of the jacking block 2.3, and a first spring 2.6 for jacking up and resetting the jacking rod 2.5.

Still more preferably, a spigot 2.7 is arranged between the ejector rod 2.5 and the cutting die 2.2. Can support echelonment with liftout pole 2.5, so can realize tang 2.7 cooperation, can restrict the ascending stroke of liftout pole 2.5 like this, so accurate will cut the part and reset.

Preferably, the round angle cutting die 3 cuts round angles on one side adjacent to the two adjacent blanks 5 at the same time; the die comprises a round-corner cutting male die 3.1 and a round-corner cutting female die 3.2; and a pilot pin 3.3 which can be inserted into the holes on the blanks 5 to separate two adjacent blanks 5 by a certain distance.

It is further preferred that the distance between two adjacent blanks 5 is less than 2mm.

Further preferably, the distance from the end face of the pilot pin 3.3 to the surface of the blank 5 is smaller than the distance from the end face of the male die to the surface of the blank 5.

It is further preferred that the distance of the holes in the blank 5, in the feeding direction, into which adjacent guide pins are inserted, is smaller than the distance between adjacent guide pins 3.3 inserted into the holes.

Still further preferably, the guiding nails 3.3 comprise round guiding nails 3.4 used for guiding and positioning round holes of the blank 5 and square guiding nails 3.5 used for guiding and positioning one square hole of the blank 5.

The blank enters a round corner cutting station, and for complete round corner trimming, the station selects to separate the blank by a certain distance H which is less than 2mm, and the round guide nails 3.4 and the square guide nails 3.5 are designed on a die pressing plate as shown in figure 16. The upper die of the die downwards guides the blank, thereby achieving the purpose of separating the blanks. And a round corner cutting male die 3.1 is used for cutting round corners at two ends. In order to ensure the spacing, five round guide nails 3.4 and five square guide nails 3.5 are adopted. The station is larger than the feeding step distance, can completely cut round corners, and cannot generate sharp corners, as shown in fig. 3.

Preferably, the bending die 4 comprises a bending rib pressing male die 4.1 and a bending rib pressing female die 4.2 which directly shape the blank 5; the end face of the bending rib pressing male die 4.1 is V-shaped, and a groove for opening the rib pressing is formed; the bending rib pressing female die 4.2 is matched with the bending rib pressing male die 4.1.

In order to prevent the molded part from jumping and rotating after being bent, which causes the molded part to be unable to be pushed out normally, a device for controlling the molded part to prevent jumping and rotating is designed. Still further preferably, the device further comprises a jumping prevention device 6, which comprises fixing seats 6.1 positioned at two ends of the blank 5; each fixed seat 6.1 is provided with a swinging rod 6.2; one end of the swinging rod 6.2 is connected with the fixed seat 6.1 in a swinging way, and the other end of the swinging rod is fixedly connected with the anti-bouncing board 6.3.

Still further preferably, the anti-jump board 6.3 is fixed to the end of the swing lever 6.2 by a pressing plate 6.4.

Still further preferably, the width of the anti-skip plate 6.3 is equal to the product of the individual part width and the modulus of egress.

Therefore, the formed piece can be smoothly pushed out of the die under the limit of the springboard 6.3 and falls into the discharging chute.

Between the corner cutting step and the bending step, the corner cutting step is not completely reset when entering the bending rib because the step distance is larger than the normal step distance, and therefore, a reset device 7 is respectively arranged at two sides between the two steps. Preferably, the reset device 7 comprises an elastic reset rod 7.1 and a striker plate 7.2; the distance between the elastic reset rod 7.1 and the striker plate 7.2 is the product of the width of a single part and the modulus.

Preferably, the elastic reset rod 7.1 comprises a reset rod 7.3 abutting at the round corner of the blank 5 and a reset spring 7.4 abutting on the reset rod 7.3.

The elastic reset rod 7.1 extrudes the blank into the bending rib pressing die 4.2, and two baffle plates 7.2 are designed for preventing the blank from being pushed out of the bending rib pressing die 4.2, so that the blank 5 returns to a normal step distance for bending rib pressing.

As a preferable scheme, the punching die 1, the cutting die 2 and the corner cutting die 3 are respectively provided with a material guide plate 8 at two ends of the blank 5; the stock guide 8 is provided with a stock guide 8.1 for accommodating the blanks 5.

The invention relates to a continuous stamping method without overlapping edges, which comprises the following steps:

s1, punching holes required by parts on a blank 5 according to part design requirements;

s2, cutting off the blank 5 according to the design width of the part;

s3, rounding the blank 5 according to the design requirement of the part;

s4, bending the blank 5 to form a rib according to the design requirement of the part;

s5, discharging.

Preferably, in S1, the parts are punched in the same direction.

Preferably, in S2, after the blank 5 is cut, the cut blank 5 is reset so that the co-located blanks 5 are on the same plane.

Preferably, in S3, the cut adjacent blanks 5 are separated by a distance, and then rounded.

Further preferably, the separation distance is less than 2mm.

Preferably, in S4, the blank 5 is reset first, and then the bending and the rib pressing are performed after the separation distance in S3 is eliminated.

The press drives the upper die to move downwards, the punching die 1 is used for punching two rows of round holes and square holes, when the upper die moves upwards, the feeder is used for feeding strip materials into the next station, the round positioning needle and the square positioning needle on the upper die continuously move downwards to enter the punched Kong Nadao positive blank 5, the strip materials are pressed by the pressing plate, and the punching die 1 is used for punching the round holes and the square holes.

When the upper die goes up, the feeder feeds the punched blanks 5 to the cutting station, and the upper die continues to go down and the two cutting male dies 2.1 finish the cutting tasks of four blanks and strips. The upper die moves upwards, and the blanks in the female die of the lower die eject the cut blanks out of the cutting female die 2.2 under the action of the floating structure 2.4.

The feeder continues feeding and feeds the cut blanks through the strip to the next station, which is empty in order to ensure the strength of the progressive die.

The feeder continues to feed into the corner cutting station, the upper die descends, five groups of guide nails 3.3 on the pressing plate separate blanks by a certain distance H, the pressing plate presses the blanks, and the upper die continues to descend and the corner cutting male die 3.1 cuts off round corners at two ends of the blanks.

And when the upper die goes up the feeder to continue feeding, the feeding enters a bending and rib pressing station. In order to ensure that the blanks accurately enter the station, reset rods 7.3 are arranged on two sides of the material guide plate 8 respectively, and four blanks are reset by utilizing the thrust of round corners under the action of reset springs 7.4. And the upper die descends to finish the bending and rib pressing work. The upper die is upward, the pressed products are well ordered under the action of the anti-jumping device 6, the manufactured products are pushed out of the die area through the feeding of the feeder, and one out of four products are completed through sliding out of the sliding groove.

It will be readily understood by those skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention and that various modifications, combinations, substitutions, improvements, etc. may be made without departing from the spirit and principles of the invention.

Claims (6)

1. The utility model provides a no overlap fillet mould of cutting which characterized in that: the round corners on one adjacent side of two adjacent blanks are cut off simultaneously; the die comprises a round angle male die and a round angle female die; the blanking machine also comprises guide nails which can be inserted into holes on the blanks to separate two adjacent blanks by a distance H, wherein H is smaller than 2mm, the guide nails are arranged on a die pressing plate, and the blanks are separated by a distance through the downward guide nails on the upper die of the die; the distance from the end face of the pilot pin to the surface of the blank is smaller than the distance from the end face of the male die to the surface of the blank.

2. The no-overlap rounding die of claim 1, wherein: along the feeding direction, the distance between the holes inserted by the adjacent guide nails on the blank is smaller than the distance between the adjacent guide nails inserted into the holes.

3. The no-overlap rounding die of claim 1 or 2, wherein: the guide nail comprises a round guide nail used for guiding and positioning round holes of the blank and a square guide nail used for guiding and positioning one square hole of the blank.

4. The no-overlap rounding die of claim 1, wherein: a reset device is arranged at the discharging position of the non-overlap corner cutting die; the resetting device comprises an elastic resetting rod and a striker plate; the distance between the elastic reset rod and the striker plate is the product of the width of a single part and the modulus.

5. The no-overlap rounding die of claim 4, wherein: the elastic reset rod comprises a reset rod which is abutted to the round corner of the blank and a reset spring which is abutted to the reset rod.

6. The no-overlap rounding die of claim 1, wherein: the round corner cutting die is provided with a material guide plate at two ends of the blank; the stock guide plate is provided with a stock guide groove for accommodating blanks.

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