CN115069893A - Stamping die and stamping method for spot welding sample U-shaped piece - Google Patents

Stamping die and stamping method for spot welding sample U-shaped piece Download PDF

Info

Publication number
CN115069893A
CN115069893A CN202210851316.6A CN202210851316A CN115069893A CN 115069893 A CN115069893 A CN 115069893A CN 202210851316 A CN202210851316 A CN 202210851316A CN 115069893 A CN115069893 A CN 115069893A
Authority
CN
China
Prior art keywords
punching
steel plate
mounting plate
plate material
stamping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210851316.6A
Other languages
Chinese (zh)
Inventor
王亚东
周宏伟
焦坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bengang Steel Plates Co Ltd
Original Assignee
Bengang Steel Plates Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bengang Steel Plates Co Ltd filed Critical Bengang Steel Plates Co Ltd
Priority to CN202210851316.6A priority Critical patent/CN115069893A/en
Publication of CN115069893A publication Critical patent/CN115069893A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/001—Shaping combined with punching, e.g. stamping and perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/08—Dies with different parts for several steps in a process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—Positioning devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention relates to a stamping die and a stamping method for a spot welding sample U-shaped piece. The beneficial effects are as follows: the device provided by the invention can be used for bending and punching, so that the problem that the coaxiality precision of hole positions on two side surfaces of a U-shaped piece of a KSII spot welding sample is difficult to control can be solved, the quality of the U-shaped piece is improved, the test precision of the KSII spot welding sample is further improved, the U-shaped piece can be continuously manufactured, and the working efficiency is improved.

Description

Stamping die and stamping method for spot welding sample U-shaped piece
Technical Field
The invention relates to the technical field of punching and shearing dies, in particular to a punching die and a punching method for a spot welding sample U-shaped piece.
Background
In order to be able to accurately measure the shear and tensile strength of a weld spot, KSII spot welding specimens are typically used that provide accurate information on the local weld spot properties. The KSII spot welding sample consists of two U-shaped pieces, the bottom surfaces of the two U-shaped pieces are mutually contacted and connected together by a resistance spot welding method, a welding spot is positioned in the center of the bottom surface where the two U-shaped pieces are contacted, two symmetrically distributed holes are respectively arranged on two side walls of the two U-shaped pieces in the KSII spot welding sample, and the KSII spot welding sample can be smoothly installed on a tensile test device only by ensuring certain coaxiality through round holes corresponding to the two side walls.
At present, there are few reports on continuous stamping dies for making KSII spot weld specimen U-pieces. For a U-shaped part with the side surface needing to be punched, in the prior art, pre-punching is firstly carried out at a corresponding position of a metal plate, and then bending operation is carried out after punching is finished, but the bent metal plate can rebound to a certain degree, and the rebound is more obvious on a high-strength steel metal plate, so that the axis of a hole site which is pre-punched deviates to some extent, and the requirement on the coaxiality of hole sites at two sides is difficult to guarantee.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of providing the stamping die and the stamping method for the spot welding sample U-shaped piece, the stamping die and the stamping method are used for bending and then punching, the problem that the coaxiality precision of hole positions on two side surfaces of the KSII spot welding sample U-shaped piece is difficult to control can be solved, the quality of the U-shaped piece is improved, the test precision of the KSII spot welding sample is further improved, the U-shaped piece can be continuously manufactured, and the working efficiency is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a stamping die for a spot welding sample U-shaped piece comprises an upper mounting plate, a prepressing mechanism, a lower mounting plate and a side stamping mechanism, and is characterized in that the upper mounting plate is of an integrally formed structure, a stamping groove cutter, a first stamping hole cutter, a positioning needle, a mounting seat and a stamping scissors are sequentially arranged on a horizontal central axis at the lower part of the upper mounting plate from left to right, wherein the two stamping groove cutters are symmetrically arranged on two sides of the first stamping hole cutter on the horizontal central axis, and two bending blocks of an incomplete cylindrical structure are rotationally connected in the mounting seat; the lower part of the upper mounting plate is also provided with two first wedge blocks which are symmetrically arranged on two sides of a horizontal central axis between the mounting seat and the punching and shearing knife;
the lower mounting plate is matched with the upper mounting plate for use and is designed in a matching way, a lower notching die, a lower bending die, a side-punching internal die and a lower punching and shearing die are sequentially arranged on a horizontal central axis at the upper part of the lower mounting plate from left to right, wherein a first through hole is formed in the lower notching die and is coaxial with a first punching knife on the upper mounting plate, two through grooves are respectively arranged on two sides of the first through hole of the lower notching die and correspond to the notching knives on the upper mounting plate, and positioning holes matched with positioning needles are formed in the positioning corresponding positions of the lower notching die and the upper mounting plate; the two sides of the side punching inner die are symmetrically provided with check blocks of rectangular sliding holes, and a limit block is arranged inside one end of the side punching inner die of the rectangular sliding holes; four positioning columns are symmetrically arranged on the left side of the notching lower die along the horizontal central axis of the lower mounting plate, and the top ends of the positioning columns are rotatably connected with limiting wheels;
the pre-pressing mechanism consists of a first bolt, a first spring and a pressing plate, wherein the first bolt penetrates through the upper mounting plate and is in threaded connection with the pressing plate, and the first spring is sleeved on the first bolt and is positioned between the upper mounting plate and the pressing plate; the prepressing mechanisms are divided into two groups, one group is positioned above the lower punching groove die on the corresponding lower mounting plate, and the other group is positioned above the side punching inner die and the punching shear lower die on the lower mounting plate;
the side punching mechanism is arranged in a rectangular sliding hole of the stop block on the lower mounting plate and comprises a side punching plate, a second bolt, a third bolt, a second wedge block, a second spring, a second punching cutter and a side punching plate, wherein the side punching plate is connected with the side punching plate through the second bolt sleeved with the second spring, the second punching cutter is arranged between the side punching plate and the side punching plate, a third through hole matched with the second punching cutter is formed in the side punching plate, the second wedge block is arranged on the right side of the side punching plate, and the third bolt is sleeved with a limit block in the rectangular sliding hole of the stop block on the lower mounting plate, and the second spring penetrates through the side punching plate and a notch formed in the side punching plate and is in threaded connection with the limit block in the rectangular sliding hole of the stop block on the lower mounting plate.
The side blow centre form is hollow cuboid structure, is equipped with two second through-holes respectively along the both sides face of lower mounting panel horizontal axis, and is equipped with the silo that link up on the lower mounting panel of the hollow portion in the middle of the side blow centre form.
The end part of the positioning needle is of a conical structure.
The upper mounting plate is fixedly connected with an upper pressing table of the punching machine through a bolt for a first mounting groove arranged on the upper mounting plate, and the lower mounting plate is fixedly connected with a workbench of the punching machine through a bolt for a second mounting groove arranged on the lower mounting plate.
The first mounting groove and the second mounting groove are both strip-shaped slotted holes.
A stamping method for a spot welding sample U-shaped piece comprises the following steps:
1) first stamping: clamping the steel plate material strip in ring grooves of the two groups of positioning column limiting wheels to move rightwards, operating a punching machine to enable an upper pressing table to slowly move downwards until a pressing plate just contacts the upper surface of the steel plate material strip, continuously feeding the steel plate material rightwards until the right end of the steel plate material strip crosses 5-10 mm of a through groove on a punching lower die, stopping feeding the steel plate material, operating the punching machine to enable the upper pressing table to continuously move downwards to complete first punching, and punching a first notch and a first positioning hole in the steel plate material strip by two punching knives and a first punching knife;
2) and (3) second stamping: operating the punching machine to lift the upper pressing table and enable the pressing plate to be just contacted with the upper surface of the steel plate material strip, moving the steel plate material strip to the right to enable the positioning pin to be aligned with the first positioning hole of the steel plate material strip to stop feeding, operating the punching machine to enable the upper pressing table to move downwards continuously, inserting the positioning pin into the first positioning hole to complete secondary punching, and punching a second notch and a second positioning hole in the steel plate material strip by the two notching knives and the first punching knife;
3) third stamping: the punching machine is operated to lift the upper pressing table and enable the pressing plate to be just contacted with the upper surface of the steel plate material strip, the steel plate material strip is moved to the right to enable the positioning pin to be aligned with the second positioning hole of the steel plate material strip and stop feeding, the punching machine is operated to enable the upper pressing table to move downwards, the positioning pin is inserted into the second positioning hole to complete third punching, the two notching knives and the first punching knife punch a third notch and a third positioning hole in the steel plate material strip, and meanwhile, the two bending blocks complete bending work of the steel plate material strip between the first positioning hole and the second positioning hole, namely a first U-shaped piece;
4) fourth stamping: operating the punching machine to lift the upper pressing table and enable the pressing plate to just contact the upper surface of the steel plate material strip, moving the steel plate material strip to the right to enable the positioning pin to be aligned with a third positioning hole of the steel plate material strip to stop feeding, operating the punching machine to enable the upper pressing table to continue to move downwards, inserting the positioning pin into the third positioning hole to complete fourth punching, punching a fourth notch and a fourth positioning hole on the steel plate material strip by two punching knives and a first punching knife, completing bending work of the steel plate material strip between the second positioning hole and the third positioning hole by two bending blocks, namely a second U-shaped piece, wherein the first U-shaped piece is movably sleeved on the side punching inner die, and meanwhile, as the upper pressing table moves downwards, the first wedge block moves downwards to push the second wedge block to move towards the horizontal central axis of the lower mounting plate and further push the side punching plate to move towards the horizontal central axis of the lower mounting plate, so that two sides of the first U-shaped piece are clamped by the side punching pressing plate and the side punching inner die, the upper pressing table continues to descend, so that the second punching cutter moves towards the horizontal central axis of the lower mounting plate along with the movement of the side punching plate, punching on two sides of the first U-shaped part is further completed, and meanwhile, the punching scissors cut off a stub bar on the right side of the first U-shaped part, the first positioning hole and the first notch;
5) and (3) fifth stamping: the punching machine is operated to lift the upper pressing table, the pressing plate is enabled to be just contacted with the upper surface of the steel plate material belt, the steel plate material belt is moved to the right side, the positioning pin is enabled to be aligned with a fourth positioning hole of the steel plate material belt, feeding is stopped, the punching machine is operated to enable the upper pressing table to move downwards, the positioning pin is inserted into the fourth positioning hole, fifth punching is completed, a fifth notch and a fifth positioning hole are punched on the steel plate material belt by the two notching knives and the first punching knife, the two bending blocks complete bending work of the steel plate material belt between the third positioning hole and the fourth positioning hole, namely a third U-shaped piece, the side punching mechanism completes punching of the second U-shaped piece, meanwhile, the first positioning hole and the first notch between the first U-shaped piece and the second U-shaped piece are cut off by the punching scissors, a first U-shaped piece finished product is obtained, and a plurality of U-shaped piece finished products can be obtained by analogy in sequence.
Further, during bending, after the pressing plate presses the steel plate material belt, the upper pressing table continuously descends until the inner side edge line of the bending block contacts with the upper surface of the steel plate material belt, the upper pressing table continuously descends, the inner side edge line of the bending block is rotated by upward force, and along with the rotation of the bending block, the outer side edge line of the bending block bends the two sides of the section of the steel plate material belt downwards until the section is formed into a U shape.
Further, after the first U-shaped piece is punched, the side punching mechanism returns to the original position under the action of the second spring after the punching machine is operated to lift the upper pressing table.
Compared with the prior art, the invention has the beneficial effects that:
1) the device can realize punching operation after bending is finished, and can ensure the form and position precision of the hole site on the side surface of the workpiece;
2) according to the device, multiple stamping forming dies are arranged in sequence, continuous stamping can be realized by using continuous steel plate strip feeding, and the manufacturing efficiency of two U-shaped pieces in a KSII spot welding sample is improved;
3) the upper mounting plate and the lower mounting plate of the device are provided with the strip-shaped mounting grooves, so that the mounting position can be conveniently adjusted, the device can be suitable for various punching machines, and the application range is wide.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the lower mounting plate of the present invention;
FIG. 3 is a schematic perspective view of the upper mounting plate of the present invention;
FIG. 4 is a schematic perspective view of the side punching structure of the present invention;
FIG. 5 is a schematic perspective view of the side-punch inner mold of the present invention;
FIG. 6 is a schematic diagram of a three-dimensional structure of a bending block according to the present invention;
FIG. 7 is a schematic perspective view of a KSII spot welding sample to be processed according to the present invention.
In the figure: 1-upper mounting plate 2-first bolt 3-first spring 4-pressing plate 5-spacing wheel 6-positioning column 7-lower mounting plate 8-first mounting groove 9-bending block 10-second mounting groove 11-notching lower die 12-through groove 13-first through hole 14-bending lower die 15-stop block 16-punching shear lower die 17-stop block 18-side punching inner die 19-second through hole 20-rectangular sliding hole 21-punching notching knife 22-first punching knife 23-side punching mechanism 24-positioning needle 25-mounting seat 26-first wedge 27-punching shear 28-side punching plate 29-second bolt 30-third bolt 31-second wedge 32-second spring 33-second punching knife 34-side punching pressing plate 35-third through hole.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1-7, the stamping die for a spot welding sample U-shaped member according to the present invention includes an upper mounting plate 1, a prepressing mechanism, a lower mounting plate 7 and a side stamping mechanism 23, wherein the upper mounting plate 1 is an integrally formed structure, and a notching knife 21, a first notching knife 22, a positioning pin 24, a mounting seat 25 and a shearing and punching knife 27 are sequentially disposed on a horizontal central axis line of a lower portion of the upper mounting plate 1 from left to right, wherein the notching knives 21 are two and symmetrically disposed on two sides of the first notching knife 22 on the horizontal central axis line, and two bending blocks 9 with an incomplete cylindrical structure are rotatably connected in the mounting seat 25; the lower part of the upper mounting plate 1 is also provided with two first wedge blocks 26 which are symmetrically arranged at two sides of a horizontal central axis between the mounting seat 25 and the punching and shearing knife 27;
the lower mounting plate 7 is matched with the upper mounting plate 1 for use and is designed in a matching way, a notching lower die 11, a bending lower die 14, a side-punching inner die 18 and a punching shear lower die 16 are sequentially arranged on a horizontal central axis at the upper part of the lower mounting plate 7 from left to right, wherein a first through hole 13 is arranged on the notching lower die 11 and is coaxial with a first punching knife 22 on the upper mounting plate 1, two through grooves 12 are respectively arranged on two sides of the first through hole 13 of the notching lower die 11 and correspond to the punching knives 21 on the upper mounting plate 1, and positioning holes matched with the positioning needles 24 are arranged at positions of the notching lower die 11 and the positioning needles 24 on the upper mounting plate 1, wherein conical parts are inserted into the positioning needles 24 to position a steel plate material belt when the positioning needles 24 fall down; the two sides of the side punching inner die 18 are symmetrically provided with the check blocks 15 of the rectangular sliding holes 20, and the inner part of one end of the side punching inner die 18 of the rectangular sliding hole 20 is provided with a limit block 17; four positioning columns 6 are symmetrically arranged on the left side of the notching lower die 11 along the horizontal central axis of the lower mounting plate, and the top ends of the positioning columns 6 are rotatably connected with limiting wheels 5;
the pre-pressing mechanism consists of a first bolt 2, a first spring 3 and a pressing plate 4, wherein the first bolt 2 penetrates through the upper mounting plate 1 to be in threaded connection with the pressing plate 4, and the first spring 3 is sleeved on the first bolt 2 and is positioned between the upper mounting plate 1 and the pressing plate 4; the prepressing mechanisms are divided into two groups, one group is positioned above the lower notching die 11 on the corresponding lower mounting plate 7, and the other group is positioned above the side-punching inner die 18 and the punching shear lower die 16 on the lower mounting plate 7;
the side punching mechanism 23 is arranged in the rectangular sliding hole 20 of the upper stop block 15 of the lower mounting plate 7 and consists of a side punching plate 28, a second bolt 29, a third bolt 30, a second wedge 31, a second spring 32, a second punching knife 33 and a side punching plate 34, wherein the side punching plate 28 is connected with the side punching plate 34 through the second bolt 29 sleeved with the second spring 32, the second punching knife 33 is arranged between the side punching plate 28 and the side punching plate 34, the side punching plate 34 is provided with a third through hole 35 (the second punching knife 33 can slide back and forth along the third through hole 35) matched with the second punching knife 33, the second wedge 31 is arranged on the right side of the side punching plate 28, and the third bolt 30 is sleeved with the second spring 32 and penetrates through the side punching plate 28 and a notch formed in the side punching plate 34 to be in threaded connection with the limit block 17 in the rectangular sliding hole 20 of the upper stop block 15 of the lower mounting plate 7.
The side-punching internal mold 18 is of a hollow cuboid structure, two second through holes 19 are formed in two side faces of the horizontal central axis of the lower mounting plate 7 respectively, and a through blanking groove is formed in the lower mounting plate 7 of the hollow part in the middle of the side-punching internal mold 18, so that blanking generated by punching and shearing can fall down, and subsequent punching and shearing work is prevented from being influenced.
The end of the positioning pin 24 is in a conical structure.
The upper mounting plate 1 is fixedly connected with an upper pressing table of the punching machine through a bolt provided with a first mounting groove 8, and the lower mounting plate 7 is fixedly connected with a workbench of the punching machine through a bolt provided with a second mounting groove 10.
The first mounting groove 8 and the second mounting groove 10 are both elongated slotted holes, so that the mounting position can be conveniently adjusted, the device can be suitable for various punching machines, and the application range is wide.
A stamping method for a spot welding sample U-shaped piece comprises the following steps:
1) first stamping: clamping the steel plate material strip in ring grooves of limiting wheels 5 of two groups of positioning columns 6 and moving the steel plate material strip rightwards, simultaneously operating a punching machine to enable an upper pressing table to slowly move downwards until a pressing plate 4 just contacts the upper surface of the steel plate material strip, continuously feeding the steel plate material strip rightwards until the right end of the steel plate material strip crosses 5-10 mm outside a through groove 12 on a punching lower die 11, stopping feeding the steel plate material strip, operating the punching machine to enable the upper pressing table to continuously move downwards to complete first punching, and punching a first notch and a first positioning hole in the steel plate material strip by two punching knives 21 and a first punching knife 22;
and (3) second stamping: operating the punching machine to lift the upper pressing table and enable the pressing plate 4 to be just contacted with the upper surface of the steel plate material strip, moving the steel plate material strip to the right to enable the positioning pins 24 to be aligned with the first positioning holes of the steel plate material strip to stop feeding, operating the punching machine to enable the upper pressing table to move downwards continuously, inserting the positioning pins 24 into the first positioning holes to fix the steel plate material strip immovably, positioning the size of a first U-shaped part at the same time to complete secondary punching, and punching second notches and second positioning holes on the steel plate material strip by the two punching knives 21 and the first punching knife 22;
third stamping: operating the punching machine to lift the upper pressing table and enable the pressing plate 4 to be just contacted with the upper surface of the steel plate material strip, moving the steel plate material strip to the right to enable the positioning needle 24 to be aligned with a second positioning hole of the steel plate material strip and stop feeding, operating the punching machine to enable the upper pressing table to continue moving downwards, inserting the positioning needle 24 into the second positioning hole to complete third punching, punching a third notch and a third positioning hole on the steel plate material strip by the two punching knives 21 and the first punching knife 22, and simultaneously completing bending work of the steel plate material strip between the first positioning hole and the second positioning hole by the two bending blocks 9 to form a first U-shaped part;
fourth stamping: the punching machine is operated to lift the upper pressing table, the pressing plate 4 is just contacted with the upper surface of the steel plate material strip, the steel plate material strip is moved to the right to enable the positioning needle 24 to be aligned with a third positioning hole of the steel plate material strip to stop feeding, the punching machine is operated to enable the upper pressing table to continue to move downwards, the positioning needle 24 is inserted into the third positioning hole to complete fourth punching, the two notching knives 21 and the first punching knife 22 punch a fourth notch and a fourth positioning hole on the steel plate material strip, the two bending blocks 9 complete the bending work of the steel plate material strip between the second positioning hole and the third positioning hole, namely a second U-shaped piece, at the moment, the first U-shaped piece is moved and sleeved on the side punching inner die 18, meanwhile, as the upper pressing table moves downwards, the first wedge block 26 moves downwards to push the second wedge block 31 to move towards the horizontal central axis of the lower mounting plate 7, further push the side punching plate 28 to move towards the horizontal central axis of the lower mounting plate 1, and enable two sides of the first U-shaped piece to be clamped by the side punching pressing plate 34 and the side punching inner die 18, the upper pressing table continues to descend, so that the second punching knife 33 moves towards the horizontal central axis of the lower mounting plate 7 along with the movement of the side punching plate 28, punching at two sides of the first U-shaped part is further completed, and meanwhile, the punching scissors 27 cut off the stub bar at the right side of the first U-shaped part, the first positioning hole and the first notch;
and (3) fifth stamping: the punching machine is operated to lift the upper pressing table, the pressing plate 4 is enabled to be just contacted with the upper surface of the steel plate material belt, the steel plate material belt is moved to the right, the positioning needle 24 is enabled to be aligned with a fourth positioning hole of the steel plate material belt to stop feeding, the punching machine is operated to enable the upper pressing table to continue to move downwards, the positioning needle 24 is inserted into the fourth positioning hole, fifth punching is completed, a fifth notch and a fifth positioning hole are punched on the steel plate material belt by the two punching cutters 21 and the first punching cutter 22, the two bending blocks 9 complete the bending work of the steel plate material belt between the third positioning hole and the fourth positioning hole, namely, the third U-shaped piece, the side punching mechanism 23 completes the punching of the second U-shaped piece, meanwhile, the first positioning hole and the first notch between the first U-shaped piece and the second U-shaped piece are cut by the punching scissors 27, a first U-shaped piece finished product is obtained, and a plurality of U-shaped piece finished products can be obtained by analogy in sequence.
Further, during bending, after the pressing plate 4 presses the steel plate material belt, the upper pressing table continuously descends until the inner side edge line of the bending block 9 contacts the upper surface of the steel plate material belt, the upper pressing table continuously descends, the inner side edge line of the bending block 9 rotates under the action of upward force, and along with the rotation of the bending block 9, the outer side edge line of the bending block 9 bends the two sides of the section of the steel plate material belt downwards until the section is formed into a U shape.
Further, after the first U-shaped member is punched, the side punching mechanism 23 is returned to its original position by the second spring 32 after the punch is operated to lift the upper press table.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. A stamping die for a spot welding sample U-shaped piece comprises an upper mounting plate, a prepressing mechanism, a lower mounting plate and a side stamping mechanism, and is characterized in that the upper mounting plate is of an integrally formed structure, a stamping groove cutter, a first stamping hole cutter, a positioning needle, a mounting seat and a stamping scissors are sequentially arranged on a horizontal central axis at the lower part of the upper mounting plate from left to right, wherein the two stamping groove cutters are symmetrically arranged on two sides of the first stamping hole cutter on the horizontal central axis, and two bending blocks of an incomplete cylindrical structure are rotationally connected in the mounting seat; the lower part of the upper mounting plate is also provided with two first wedge blocks which are symmetrically arranged on two sides of a horizontal central axis between the mounting seat and the punching and shearing knife;
the lower mounting plate is matched with the upper mounting plate for use and is designed in a matching way, a lower notching die, a lower bending die, a side-punching internal die and a lower punching and shearing die are sequentially arranged on a horizontal central axis at the upper part of the lower mounting plate from left to right, wherein a first through hole is formed in the lower notching die and is coaxial with a first punching knife on the upper mounting plate, two through grooves are respectively arranged on two sides of the first through hole of the lower notching die and correspond to the notching knives on the upper mounting plate, and positioning holes matched with positioning needles are formed in the positioning corresponding positions of the lower notching die and the upper mounting plate; the two sides of the side punching inner die are symmetrically provided with check blocks of rectangular sliding holes, and a limit block is arranged inside one end of the side punching inner die of the rectangular sliding holes; four positioning columns are symmetrically arranged on the left side of the notching lower die along the horizontal central axis of the lower mounting plate, and the top ends of the positioning columns are rotatably connected with limiting wheels;
the pre-pressing mechanism consists of a first bolt, a first spring and a pressing plate, wherein the first bolt penetrates through the upper mounting plate and is in threaded connection with the pressing plate, and the first spring is sleeved on the first bolt and is positioned between the upper mounting plate and the pressing plate; the prepressing mechanisms are divided into two groups, one group is positioned above the lower punching groove die on the corresponding lower mounting plate, and the other group is positioned above the side punching inner die and the punching shear lower die on the lower mounting plate;
the side punching mechanism is arranged in a rectangular sliding hole of the stop block on the lower mounting plate and comprises a side punching plate, a second bolt, a third bolt, a second wedge block, a second spring, a second punching cutter and a side punching plate, wherein the side punching plate is connected with the side punching plate through the second bolt sleeved with the second spring, the second punching cutter is arranged between the side punching plate and the side punching plate, a third through hole matched with the second punching cutter is formed in the side punching plate, the second wedge block is arranged on the right side of the side punching plate, and the third bolt is sleeved with a limit block in the rectangular sliding hole of the stop block on the lower mounting plate, and the second spring penetrates through the side punching plate and a notch formed in the side punching plate and is in threaded connection with the limit block in the rectangular sliding hole of the stop block on the lower mounting plate.
2. The stamping die for the spot welding sample U-shaped piece as claimed in claim 1, wherein the side punching inner die is of a hollow cuboid structure, two second through holes are respectively formed along two side surfaces of a horizontal central axis of the lower mounting plate, and a through blanking groove is formed in the lower mounting plate of the hollow part in the middle of the side punching inner die.
3. The stamping die for a spot welding sample U-shaped piece according to claim 1, wherein the end of the positioning pin is of a conical structure.
4. The stamping die for spot welding sample U-shaped pieces as claimed in claim 1, wherein the upper mounting plate is fixedly connected with the upper pressing table of the stamping machine through a bolt provided with a first mounting groove thereon, and the lower mounting plate is fixedly connected with the working table of the stamping machine through a bolt provided with a second mounting groove thereon.
5. The stamping die for spot welding sample U-shaped pieces as claimed in claim 1, wherein the first mounting groove and the second mounting groove are both elongated slots.
6. The stamping method for realizing the spot welding sample U-shaped piece as claimed in claim 1 is characterized by comprising the following steps:
1) first stamping: clamping the steel plate material strip in ring grooves of the two groups of positioning column limiting wheels to move rightwards, operating a punching machine to enable an upper pressing table to slowly move downwards until a pressing plate just contacts the upper surface of the steel plate material strip, continuously feeding the steel plate material rightwards until the right end of the steel plate material strip crosses 5-10 mm of a through groove on a punching lower die, stopping feeding the steel plate material, operating the punching machine to enable the upper pressing table to continuously move downwards to complete first punching, and punching a first notch and a first positioning hole in the steel plate material strip by two punching knives and a first punching knife;
2) and (3) second stamping: operating the punching machine to lift the upper pressing table and enable the pressing plate to be just contacted with the upper surface of the steel plate material strip, moving the steel plate material strip to the right to enable the positioning pin to be aligned with the first positioning hole of the steel plate material strip to stop feeding, operating the punching machine to enable the upper pressing table to move downwards continuously, inserting the positioning pin into the first positioning hole to complete secondary punching, and punching a second notch and a second positioning hole in the steel plate material strip by the two notching knives and the first punching knife;
3) third stamping: the punching machine is operated to lift the upper pressing table and enable the pressing plate to be just contacted with the upper surface of the steel plate material strip, the steel plate material strip is moved to the right to enable the positioning pin to be aligned with the second positioning hole of the steel plate material strip and stop feeding, the punching machine is operated to enable the upper pressing table to move downwards, the positioning pin is inserted into the second positioning hole to complete third punching, the two notching knives and the first punching knife punch a third notch and a third positioning hole in the steel plate material strip, and meanwhile, the two bending blocks complete bending work of the steel plate material strip between the first positioning hole and the second positioning hole, namely a first U-shaped piece;
4) fourth stamping: the punching machine is operated to lift the upper pressing platform and enable the pressing plate to be just contacted with the upper surface of the steel plate material strip, the steel plate material strip is moved to the right to enable the positioning pin to be aligned with a third positioning hole of the steel plate material strip to stop feeding, the punching machine is operated to enable the upper pressing platform to move downwards, the positioning pin is inserted into the third positioning hole to complete fourth punching, two notching knives and a first punching knife punch a fourth notch and a fourth positioning hole in the steel plate material strip, two bending blocks complete the bending work of the steel plate material strip between the second positioning hole and the third positioning hole, namely a second U-shaped piece, meanwhile, as the upper pressing platform moves downwards, the first wedge block moves downwards to push the second wedge block to move towards the horizontal central axis of the lower mounting plate, so that the side punching plate moves towards the horizontal central axis of the lower mounting plate, two sides of the first U-shaped piece are clamped by the side pressing plate and the side punching inner die, the upper pressing platform continues to descend, so that the second punching knife moves towards the horizontal central axis of the lower mounting plate along with the movement of the side punching plate, punching holes on two sides of the first U-shaped part, and simultaneously cutting off a stub bar on the right side of the first U-shaped part, a first positioning hole and a first notch by using a pair of punching scissors;
5) fifth punching: the punching machine is operated to lift the upper pressing table, the pressing plate is enabled to be just contacted with the upper surface of the steel plate material belt, the steel plate material belt is moved to the right to enable the positioning pin to be aligned with a fourth positioning hole of the steel plate material belt and stop feeding, the punching machine is operated to enable the upper pressing table to move downwards, the positioning pin is inserted into the fourth positioning hole to complete fifth punching, a fifth notch and a fifth positioning hole are punched on the steel plate material belt by the two punching knives and the first punching knife, the two bending blocks complete bending work of the steel plate material belt between the third positioning hole and the fourth positioning hole, namely, a third U-shaped piece, the side punching mechanism completes punching of the second U-shaped piece, meanwhile, the first positioning hole and the first notch between the first U-shaped piece and the second U-shaped piece are cut off by the punching scissors, a first U-shaped piece finished product is obtained, and a plurality of U-shaped piece finished products can be obtained by analogy in sequence.
CN202210851316.6A 2022-07-20 2022-07-20 Stamping die and stamping method for spot welding sample U-shaped piece Pending CN115069893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210851316.6A CN115069893A (en) 2022-07-20 2022-07-20 Stamping die and stamping method for spot welding sample U-shaped piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210851316.6A CN115069893A (en) 2022-07-20 2022-07-20 Stamping die and stamping method for spot welding sample U-shaped piece

Publications (1)

Publication Number Publication Date
CN115069893A true CN115069893A (en) 2022-09-20

Family

ID=83260391

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210851316.6A Pending CN115069893A (en) 2022-07-20 2022-07-20 Stamping die and stamping method for spot welding sample U-shaped piece

Country Status (1)

Country Link
CN (1) CN115069893A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115255136A (en) * 2022-09-27 2022-11-01 徐州双裕电子技术有限公司 Spectrometer mounting punching press forming device that punches
CN116278171A (en) * 2023-03-31 2023-06-23 天耀环保包装(肇庆)有限公司 Die cutting equipment for corrugated board production

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115255136A (en) * 2022-09-27 2022-11-01 徐州双裕电子技术有限公司 Spectrometer mounting punching press forming device that punches
CN116278171A (en) * 2023-03-31 2023-06-23 天耀环保包装(肇庆)有限公司 Die cutting equipment for corrugated board production
CN116278171B (en) * 2023-03-31 2023-10-20 天耀环保包装(肇庆)有限公司 Die cutting equipment for corrugated board production

Similar Documents

Publication Publication Date Title
CN115069893A (en) Stamping die and stamping method for spot welding sample U-shaped piece
CA1055279A (en) Method for forming counter-sunk hole in a base material and an apparatus for carrying out the same
EP2316588B1 (en) Punch press drive
CN109759523B (en) Online cutting method for special-shaped end of automobile frame cross beam
WO2018019504A1 (en) Device for stamping and punching through a workpiece
CN2920493Y (en) Hydraulic angle steel angle cutting machine
CN217748969U (en) Stamping die of spot welding sample U-shaped piece
JPS6272441A (en) Method and apparatus for connecting plate by punch pin
CN111958684A (en) Fixed-number cutting mechanism for continuous stamping die
US3815459A (en) Unitized tooling
CN215677785U (en) Three-point bending sample slotting tool
JPS61154721A (en) Method and device for continuous blanking
CN114346049A (en) Stamping device is used in sheet metal component processing of high-efficient automatic feeding
CN113145731A (en) Side punching die for annular workpiece
CN220805219U (en) Limiting structure of sheet metal part
CN210877059U (en) Link plate assembling die
CN219561089U (en) Rod piece forming device
CN220680680U (en) Workpiece fast-assembling structure
CN219805226U (en) Stamping die for wooden house fittings
CN216524869U (en) Cutting device for online sampling on belt material
CN210023460U (en) Seat reel fixing plate and die thereof
CN220049710U (en) Efficient hinge accessory stamping die
CN216324480U (en) High-precision punching equipment for chain outer chain plate
CN219985960U (en) Stamping device convenient to change drift
CN215199022U (en) Thin-wall tail pipe bending forming device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination