CN112676433A - Non-overlap edge round corner cutting die - Google Patents

Non-overlap edge round corner cutting die Download PDF

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Publication number
CN112676433A
CN112676433A CN202011435520.7A CN202011435520A CN112676433A CN 112676433 A CN112676433 A CN 112676433A CN 202011435520 A CN202011435520 A CN 202011435520A CN 112676433 A CN112676433 A CN 112676433A
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China
Prior art keywords
die
blank
round
cutting
distance
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CN202011435520.7A
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Chinese (zh)
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CN112676433B (en
Inventor
袁石华
何柏林
王学成
杨立军
沈有仓
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General Casting And Forging Branch Of Dongfeng Auto Parts Group Co ltd
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Dongfeng Motor Co Ltd
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Abstract

The invention discloses a non-overlap edge fillet cutting die which is characterized in that: simultaneously cutting off the round corners at the adjacent side of two adjacent blanks; the device comprises a round corner cutting male die and a round corner cutting female die; the device also comprises a pilot nail which can be inserted into the hole on the blank to separate two adjacent blanks for a certain distance. The problem of punching round corners at two ends is solved by separating the blanks at the station by a certain distance to meet the requirement of punching the round corners.

Description

Non-overlap edge round corner cutting die
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 common product and is widely used, especially in the automobile industry. The precision grade of a general L-shaped support product is T12 grade, and the L-shaped support belongs to a part with low precision requirement, and the size technical requirement of the L-shaped support product is not high. The product is also subjected to plastic coating and painting treatment.
As shown in fig. 3, after the product is rounded in the prior art, because the rounded corner is small, a process sharp corner exists near the cut, and a safety hazard exists.
As shown in fig. 4 and 5, in the conventional sample arrangement, square holes and round holes of adjacent parts are arranged in a staggered manner, and the arrangement distance between the adjacent parts is large, and the process is square hole punching, round hole → groove punching → pre-bending → bending and rib pressing → cutting. Therefore, 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 waste materials due to scrap are generated in the year.
The overlap of each product of the original stock layout needs more than one time of the thickness of the material, and the waste materials of six products can be more than one product and are extremely wasted.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the lap-free continuous die which solves the problems of low material utilization rate and process sharp angle generated by rounding.
In order to achieve the purpose, the invention designs a continuous die without overlap edges, which is characterized in that: the L-shaped bracket with the round corners for punch forming 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 a round hole and two square holes on the blank, and all the punched round holes are in the same straight line.
Preferably, the cutting die comprises a cutting male die and a cutting female die, and a plurality of jacking blocks are arranged on the cutting female die at intervals; and a cutting male die is arranged above each ejection block, and a floating structure for resetting the ejection block is arranged below each ejection block.
Further preferably, the floating mechanism comprises an ejector rod connected with the bottom of the ejector block, and a first spring for jacking and resetting the ejector rod.
Still further preferably, a seam allowance is arranged between the ejector rod and the cutting female die. Can support the echelonment with the ejector beam, so can realize the tang cooperation, can restrict the upward stroke of ejector beam like this, so accurate with the part that cuts reset.
Preferably, the fillet cutting die simultaneously cuts off fillets on adjacent sides of two adjacent blanks; the device comprises a round corner cutting male die and a round corner cutting female die; the device also comprises a pilot nail which can be inserted into the hole on the blank to separate two adjacent blanks for a certain distance.
Further preferably, the distance between two adjacent blanks is less than 2 mm.
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, in the feeding direction, the distance between the holes of the blank into which the adjacent guide pins are inserted is smaller than the distance between the adjacent guide pins inserted into the holes.
Still further preferably, the guiding nail comprises a round guiding nail for guiding and positioning a round hole of the blank and a square guiding nail for guiding and positioning one square hole of the blank.
Preferably, the bending die comprises a bending rib pressing male die and a bending rib pressing female die which directly form the blank; the end face of the bending rib-pressing male die is V-shaped and is provided with a groove for forming a rib; and the bending rib-pressing female die is matched with the bending rib-pressing male die.
In order to prevent the formed part from being pushed out normally due to the fact that the formed part cannot be pushed out normally due to the fact that the product of the formed part is jumped and rotated after bending, a device for controlling the formed part to prevent jumping and rotation is designed. Still further preferably, the anti-jump device comprises fixed 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 mode, and the other end of the swinging rod is fixedly connected with the anti-jumping plate.
Still further preferably, the anti-springing board is fixed at the end of the swing rod through a pressing board.
Still further preferably, the width of the anti-jump board is equal to the product of the width of the single part and the output module.
Between the round corner cutting step and the bending step, the round corner cutting station cannot be completely reset when the step pitch is larger than the normal step pitch and the round corner cutting station enters the bending rib pressing step, so that two sides between the two stations are respectively provided with a reset device. Preferably, 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 of the output part.
Preferably, the elastic reset rod comprises a reset rod abutted at the round corner of the blank and a reset spring abutted on the reset rod.
As a preferred scheme, the punching die, the cutting die and the round corner cutting die are provided with guide plates at two ends of the blank; the material guide plate is provided with a material guide groove for accommodating blanks.
The invention relates to a lap-free continuous stamping method, which comprises the following steps:
s1, punching holes needed by the parts on the blank according to the design requirements of the parts;
s2, cutting the blank according to the design width of the part;
s3, cutting round corners on the blank according to the design requirements of the part;
s4, bending and ribbing the blank according to the design requirements of the part;
and S5, discharging.
Preferably, in S1, the parts are punched in the same direction.
Preferably, in S2, the cut blank is reset after being cut so that the blanks at the same position are on the same plane.
Preferably, in S3, the cut adjacent blanks are separated by a certain distance and then rounded.
Further preferred, the separation distance is less than 2 mm.
Preferably, in S4, the blank is reset, and the bending and beading are performed after the separation distance in S3 is eliminated.
The invention optimizes the parts from stock layout to the die, and the invention is mainly how to feed materials well under the condition of separating from a carrier, and how to cut round corners at two ends and feed materials in place after separation.
The invention has no overlap edge sample arrangement, solves the problem of maximizing the material utilization and improves the efficiency from one mould to two moulds to one mould to discharge four pieces. The problem of punching round corners at two ends is solved by separating the blanks at the station by a certain distance to meet the requirement of punching the round corners.
The invention finishes four products from material utilization rate to a continuous die mechanism through punching, cutting, vacancy, blank fillet cutting, resetting, bending and rib pressing. It has high efficiency and no overlap.
The bending and ribbing station of the invention can reduce the working procedures at one time, and the anti-jumping device can prevent the product pressed in bending and pushing from jumping or jumping, so that the product can be smoothly sent out.
Drawings
Figures 1 and 2 show an L-shaped bracket to be manufactured,
figure 3 is a representation of the sharp corners present in prior art processes,
FIGS. 4 and 5 are schematic diagrams of prior art stock patterns;
figure 6 is a schematic perspective view of a continuous die without a bead according to the invention,
figure 7 is a schematic front view of a continuous die without overlap according to the invention,
FIG. 8 is a schematic top view of a continuous die without a lip of the present invention;
FIG. 9 is a schematic cross-sectional view of the cutting die of the present invention;
FIG. 10 is a perspective view of the radiusing die of the present invention;
FIG. 11 is a schematic perspective view of the bending mold of the present invention;
FIG. 12 is a schematic perspective view of the anti-bounce device of the present invention;
fig. 13 is a schematic perspective view of the resetting device of the invention;
FIGS. 14 and 15 are schematic illustrations of layout for the lap-free continuous stamping process of the present invention;
FIG. 16 is a partial view of the blank at the corner of the cut circle of the present invention.
In the figure: 1. punching a die; 2. cutting off the mold; 2.1, cutting off the male die; 2.2, cutting off the female die; 2.3, ejecting a material block; 2.4, a floating structure; 2.5, a material ejecting rod; 2.6, a first spring; 2.7, stopping the opening; 3. a fillet cutting die; 3.1, cutting a round corner convex die; 3.2, cutting a round angle female die; 3.3, aligning the nail; 3.4, round guide nails; 3.5, square pilot nails; 4. bending the die; 4.1, bending and rib-pressing male dies; 4.2, bending and ribbing the female die; 5. a blank; 6. an anti-bounce device; 6.1, fixing a seat; 6.2, a swing rod; 6.3, an anti-bouncing plate; 6.4, pressing a plate; 7. a resetting 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 material guide groove.
Detailed Description
The technical solutions of the present invention (including the preferred ones) are further described in detail by way of fig. 6 to 15 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 6 to 15, the lap-free progressive die for punch forming an L-shaped bracket with a round corner comprises a punching die 1, a cutting die 2, a round corner cutting die 3 and a bending die 4 which are sequentially arranged along a feeding direction.
Preferably, the punching die 1 punches a round hole and two square holes on the blank 5, and all the punched round holes are in 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 top blocks 2.3 are arranged on the cutting female die 2.2 at intervals; a cutting convex die 2.1 is arranged above each top material block 2.3, and a floating structure 2.4 for resetting the top material block 2.3 is arranged below the top material block.
Further preferably, the floating mechanism comprises an ejector rod 2.5 connected with the bottom of the ejector block 2.3 and a first spring 2.6 for jacking and resetting the ejector rod 2.5.
More preferably, a seam allowance 2.7 is arranged between the ejector rod 2.5 and the cutting female die 2.2. Can support the echelonment with ejector beam 2.5, so can realize the cooperation of tang 2.7, can restrict the upstroke of ejector beam 2.5 like this, so accurate part that will cut resets.
Preferably, the fillet cutting die 3 simultaneously cuts off the fillet on the adjacent side of two adjacent blanks 5; the device comprises a fillet cutting convex die 3.1 and a fillet cutting concave die 3.2; and a pilot pin 3.3 which can be inserted into a hole in the blank 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 2 mm.
It is further preferred that 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 punch to the surface of the blank 5.
It is further preferred that the distance of the holes in the blank 5 into which adjacent guide pins are inserted is smaller than the distance between adjacent guide pins 3.3 inserted into the holes in the feeding direction.
Still more preferably, the guiding nail 3.3 comprises a round guiding nail 3.4 for guiding and positioning a round hole of the blank 5 and a square guiding nail 3.5 for guiding and positioning one square hole of the blank 5.
The blank enters a round corner cutting station, in order to completely trim a round corner, the blank is separated by a certain distance H, H is less than 2mm, see figure 16, and a round pilot pin 3.4 and a square pilot pin 3.5 are designed on a die pressure plate. The upper die of the die moves downwards to guide the blank, so that the purpose of separating the blank is achieved. And the fillet-cutting convex die 3.1 is used for cutting fillets at two ends. To ensure spacing, five round pilot pins 3.4 and five square pilot pins 3.5 are used. The station is larger than the feeding step pitch, can completely cut round corners, and does not have sharp corners, as shown in figure 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 form the blank 5; the end face of the bending rib-pressing convex die 4.1 is V-shaped and is provided with a groove for forming a rib; the bending rib-pressing female die 4.2 is matched with the bending rib-pressing male die 4.1.
In order to prevent the formed part from being pushed out normally due to the fact that the formed part cannot be pushed out normally due to the fact that the product of the formed part is jumped and rotated after bending, a device for controlling the formed part to prevent jumping and rotation is designed. Still further preferably, the anti-jump device 6 is also included, and comprises fixed seats 6.1 positioned at two ends of the blank 5; each fixed seat 6.1 is provided with a swing rod 6.2; one end of the oscillating rod 6.2 is connected with the fixed seat 6.1 in an oscillating way, and the other end is fixedly connected with the anti-springing board 6.3.
It is further preferred that the anti-jump plate 6.3 is fixed to the end of the swing lever 6.2 by a pressure plate 6.4.
It is still further preferred that the width of the anti-jump plate 6.3 is equal to the product of the width of a single part and the modulus of the output.
Therefore, the formed part can be smoothly pushed out of the die under the limit of the anti-jumping plate 6.3 and falls into the discharging chute.
Between the round corner cutting step and the bending step, the round corner cutting station cannot be completely reset when the step pitch is larger than the normal step pitch and the round corner cutting station enters the bending rib pressing step, and therefore, two sides between the two stations are respectively provided with a reset device 7. Preferably, the resetting device 7 comprises an elastic resetting 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 of the output.
Preferably, the elastic return arm 7.1 comprises a return arm 7.3 abutting against a round corner of the blank 5 and a return spring 7.4 abutting against the return arm 7.3.
The elastic reset rod 7.1 extrudes the blank into the bending rib-pressing female die 4.2, and two material blocking plates 7.2 are designed outside the bending rib-pressing female die 4.2 for preventing the blank from being pushed out, so that the blank 5 returns to the normal step pitch for bending and rib pressing.
Preferably, the punching die 1, the cutting die 2 and the round corner cutting die 3 are provided with guide plates 8 at two ends of the blank 5; the material guide plate 8 is provided with a material guide groove 8.1 for accommodating the blank 5.
The invention relates to a lap-free continuous stamping method, which comprises the following steps:
s1, punching holes needed by the parts on the blank 5 according to the design requirements of the parts;
s2, cutting the blank 5 according to the design width of the part;
s3, cutting round corners of the blank 5 according to the design requirements of the parts;
s4, bending and ribbing the blank 5 according to the design requirements of the part;
and S5, discharging.
Preferably, in S1, the parts are punched in the same direction.
Preferably, in S2, the cut blank 5 is reset after the blank 5 is cut so that the blank 5 at the same position is on the same plane.
Preferably, in S3, the cut adjacent blanks 5 are separated by a certain distance and then subjected to corner rounding.
Further preferred, the separation distance is less than 2 mm.
Preferably, in S4, the blank 5 is reset, and the bending and beading are performed after the separation distance in S3 is removed.
The press machine drives the upper die to move downwards, the punching die 1 finishes punching two rows of round holes and square holes, when the upper die moves upwards, the feeder sends the strip materials into the next station, the upper die continues to move downwards to press round positioning pins and square positioning pins on the pressure plate to enter punched holes to guide the blank materials 5, the pressure plate presses the strip materials, and the punching die 1 punches the round holes and the square holes.
When the upper die moves upwards, the feeder feeds the punched blank 5 to a cutting station, and the upper die continues to move downwards to complete the task of cutting four blanks and strips by the two cutting convex dies 2.1. The upper die moves upwards, and the blank in the lower die concave die ejects the cut blank out of the cutting concave die 2.2 under the action of the floating structure 2.4.
The feeder continues to feed and feed the cut blanks through the strip to the next station, which is vacant to ensure the strength of the continuous die.
The feeder continues to feed materials to enter a round corner cutting station, the upper die moves downwards, five groups of pilot nails 3.3 on the pressure plate separate blanks for a certain distance H, the pressure plate presses the blanks, and the upper die continues to move downwards to the round corner cutting convex die 3.1 to cut round corners at two ends of the blanks.
And when the upper die goes up to the feeder to continue feeding, the upper die enters a bending and rib pressing station. In order to ensure that the blanks accurately enter the station, two sides of the material guide plate 8 are respectively provided with a reset rod 7.3, and the four blanks are reset by using fillet thrust under the action of a reset spring 7.4. And the upper die moves downwards to finish the bending and ribbing work. And the upper die moves upwards, the pressed products are well ordered under the action of the anti-bouncing device 6, the manufactured products are pushed out of the die area through the feeding of the feeding machine, and the products slide out of the sliding groove to finish four products.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.

Claims (8)

1. The utility model provides a no overlap edge fillet cutting mould which characterized in that: simultaneously cutting off the round corners at the adjacent side of two adjacent blanks; the device comprises a round corner cutting male die and a round corner cutting female die; the device also comprises a pilot nail which can be inserted into the hole on the blank to separate two adjacent blanks for a certain distance.
2. The non-overlap corner rounding die of claim 1, wherein: the distance between two adjacent blanks is less than 2 mm.
3. The non-overlap corner rounding die of claim 1, wherein: 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.
4. The non-overlap corner rounding die of claim 1, wherein: in the feeding direction, the distance between the holes inserted by the adjacent guide pins on the blank is smaller than the distance between the adjacent guide pins inserted into the holes.
5. The non-overlap corner rounding die according to any one of claims 1 to 4, wherein: the guide nail comprises a round guide nail for guiding and positioning the round hole of the blank and a square guide nail for guiding and positioning one square hole of the blank.
6. The non-overlap corner rounding die of claim 1, wherein: a resetting device is arranged at the discharge part of the lap-free corner cutting die; 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 of the output part.
7. The non-overlap corner rounding die of claim 6, wherein: the elastic reset rod comprises a reset rod and a reset spring, wherein the reset rod is abutted to the round corner of the blank, and the reset spring is abutted to the reset rod.
8. The non-overlap corner rounding die of claim 1, wherein: the round-corner cutting die is provided with material guide plates at two ends of the blank; the material guide plate is provided with a material guide groove for accommodating blanks.
CN202011435520.7A 2020-12-07 2020-12-07 Round angle cutting die without overlapping edge Active CN112676433B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN202011435520.7A CN112676433B (en) 2020-12-07 2020-12-07 Round angle cutting die without overlapping edge

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CN112676433B CN112676433B (en) 2023-04-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113523091A (en) * 2021-06-23 2021-10-22 东风柳州汽车有限公司 7-shaped hole machining method

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Publication number Priority date Publication date Assignee Title
CN103658251A (en) * 2013-12-18 2014-03-26 天津市津荣天宇精密机械有限公司 Floating bridge type bending structure of closed part sequential conveying die
CN103737667A (en) * 2013-05-23 2014-04-23 安吉上墅奥科印花设备制造厂 Mat circular-bead cutting device
JP2015085385A (en) * 2013-09-27 2015-05-07 株式会社ジェイテクト Press molding device and press molding method
CN204700162U (en) * 2015-06-12 2015-10-14 衡阳财经工业职业技术学院 A kind of no waste mine stock layout Die structure progressive die
WO2018056259A1 (en) * 2016-09-20 2018-03-29 株式会社三井ハイテック Processing device for thin plate material and processing method for same
CN109647973A (en) * 2018-12-10 2019-04-19 蚌埠依爱电子科技有限责任公司 A kind of method of vertical punching deburring
CN209716208U (en) * 2019-10-25 2019-12-03 宁波信幸隆密封制品有限公司 A kind of multi-station Die Used in Pressworking of high-accuracy cutting edge cooperation
CN110788199A (en) * 2019-10-24 2020-02-14 王招军 Multi-specification die cutting module and method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103737667A (en) * 2013-05-23 2014-04-23 安吉上墅奥科印花设备制造厂 Mat circular-bead cutting device
JP2015085385A (en) * 2013-09-27 2015-05-07 株式会社ジェイテクト Press molding device and press molding method
CN103658251A (en) * 2013-12-18 2014-03-26 天津市津荣天宇精密机械有限公司 Floating bridge type bending structure of closed part sequential conveying die
CN204700162U (en) * 2015-06-12 2015-10-14 衡阳财经工业职业技术学院 A kind of no waste mine stock layout Die structure progressive die
WO2018056259A1 (en) * 2016-09-20 2018-03-29 株式会社三井ハイテック Processing device for thin plate material and processing method for same
CN109647973A (en) * 2018-12-10 2019-04-19 蚌埠依爱电子科技有限责任公司 A kind of method of vertical punching deburring
CN110788199A (en) * 2019-10-24 2020-02-14 王招军 Multi-specification die cutting module and method
CN209716208U (en) * 2019-10-25 2019-12-03 宁波信幸隆密封制品有限公司 A kind of multi-station Die Used in Pressworking of high-accuracy cutting edge cooperation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113523091A (en) * 2021-06-23 2021-10-22 东风柳州汽车有限公司 7-shaped hole machining method

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