CN111229921A - Sheet metal punching process and cutter thereof - Google Patents

Sheet metal punching process and cutter thereof Download PDF

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Publication number
CN111229921A
CN111229921A CN202010055007.9A CN202010055007A CN111229921A CN 111229921 A CN111229921 A CN 111229921A CN 202010055007 A CN202010055007 A CN 202010055007A CN 111229921 A CN111229921 A CN 111229921A
Authority
CN
China
Prior art keywords
cutter
blanking
sheet metal
core
hole
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.)
Withdrawn
Application number
CN202010055007.9A
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Chinese (zh)
Inventor
俞佩华
张爱云
陆海斌
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.)
Shanghai Kaisidadao Precision Electronics Manufacturing Co ltd
Original Assignee
Shanghai Kaisidadao Precision Electronics Manufacturing 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 Shanghai Kaisidadao Precision Electronics Manufacturing Co ltd filed Critical Shanghai Kaisidadao Precision Electronics Manufacturing Co ltd
Priority to CN202010055007.9A priority Critical patent/CN111229921A/en
Publication of CN111229921A publication Critical patent/CN111229921A/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/24Perforating, i.e. punching holes
    • B21D28/34Perforating tools; Die holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/24Perforating, i.e. punching holes
    • B21D28/26Perforating, i.e. punching holes in sheets or flat parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02Ejecting devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention discloses a sheet metal punching process and a cutter thereof, and relates to the technical field of sheet metal precision machining. Aiming at the problem of unsmooth blanking in the prior art, the blanking device is provided with the protruding parts, three non-collinear protruding parts are formed on the edges of the blanking after the cutter punches the blanking hole, and the protruding parts are tightly abutted against the inner wall of the blanking hole, so that the blanking is ensured to be stably clamped in the blanking hole and not easy to pop up, and the blanking device is more favorable for separating and discharging the punched blanking.

Description

Sheet metal punching process and cutter thereof
Technical Field
The invention relates to the technical field of sheet metal precision machining, in particular to a sheet metal punching process and a cutter thereof.
Background
The punching is to apply external force to plates, strips, pipes, profiles and the like by a press and a die to separate the materials, so that holes with required shapes and sizes are obtained on the sheet metal. There are also a large number of stamped parts in products such as instruments, household appliances, bicycles, office machines, and household utensils.
For current tool bit that punches a hole, chinese patent that patent publication is CN204208973U discloses a square hole tool bit that punches a hole, and the tool bit is cuboid structure, and the one end of tool bit is for being provided with the punching end of inclined plane, and the punching end is provided with the circular arc groove along the incline direction on inclined plane, and the circular arc groove is provided with and is no less than two, and the inclined plane of punching end is arranged by the circular arc groove and is constituteed, and circular arc groove two by two meets and forms the bead on the inclined plane, and the bead is higher than the side edge on punching end left and right sides.
Referring to fig. 1, the square end face tool in the above patent and the tool commonly used in daily production generally have a processing problem in the process of stamping: the cutter can not be totally perpendicular to the sheet metal component surface punching operation, to dashe the round hole for example, after the relative sheet metal component surface slope of cutter, the blanking surface after punching a hole is oval, and the blanking hole still is the round hole with cutter radius matched with, so the both ends of blanking can support the downthehole wall of blanking, and the blanking is bending state and is located the blanking downthehole, combine the elasticity of repeated punching operation environment and metal self, the blanking plays to take place when the condition on workstation sheet metal component surface, thereby influence the punching operation of follow-up sheet metal component.
Disclosure of Invention
Aiming at the problem of unsmooth blanking in the prior art, the invention aims to provide a sheet metal punching process and a cutter thereof, which have the advantage of improving the smoothness of punching and blanking.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a panel beating punching process, includes that the adoption cutter punches a hole and processes, the cutting end edge of cutter is provided with three bulge at least, and is a plurality of the position of bulge adopts the setting of collineation not.
Through above-mentioned technical scheme, during the use, utilize the cutting end sheet metal component that punches a hole of cutter, then blanking edge forms the bulge position that corresponds with a plurality of bulge shape, and a plurality of bulge positions are changeed and are expected downthehole wall butt with the blanking, again because a plane is decided to three points, and support stability is strong, adopts a plurality of bulges of non-collinear setting, more is favorable to the blanking card to go into to the blanking downthehole, prevents that the blanking from popping out from the blanking downthehole.
The present invention in a preferred example may be further configured to: the cutter comprises a cutter handle block and a cutter core detachably arranged in the cutter handle block, and one end of the cutter core extends out of the cutter handle block and is provided with the protruding part.
Through the technical scheme, the cutter core and the cutter handle block can be detachably connected, so that the cutter core is replaced to complete maintenance of the cutter, and the replacement and maintenance cost of the cutter is reduced.
The present invention in a preferred example may be further configured to: the center of a graph formed by sequentially connecting the plurality of convex parts is coincided with the center of the end face of the cutter core.
Through above-mentioned technical scheme, the position that corresponds the bulge on the blanking is the strong point of blanking, and the center of the holding surface that a plurality of strong points formed coincides with sword core terminal surface center, is favorable to the strong point to act on the focus department of blanking like this more, improves the chucking stability of blanking in the blanking hole.
The present invention in a preferred example may be further configured to: the size setting of bulge satisfies the dimensional error of punching process.
Through above-mentioned technical scheme, ensure that the size precision of punching a hole processing satisfies the demand.
The present invention in a preferred example may be further configured to: the cutting tool comprises a punching die and a lower template, wherein the cutting tool is fixed on the punching die, and the lower template is provided with a blanking hole;
when the cutter is inserted into the blanking hole, high-pressure airflow is blown into the blanking hole;
and stopping blowing high-pressure air flow into the blanking hole when the cutter leaves the blanking hole.
Through above-mentioned technical scheme, the knife core inserts to the downthehole back of blanking, and the one end in blanking hole is stopped up, blows in high-pressure air current in to the blanking, utilizes the backward flow of air, is favorable to the blanking to be discharged more.
A sheet metal punching tool comprises a tool shank block, wherein an insertion hole penetrates through the tool shank block, a tool core is inserted and connected into the insertion hole, and a locking piece used for locking the tool core into the tool shank block is arranged on the tool shank block;
one end of the cutter core extends out of the cutter handle block to form a cutting end, three protruding parts are integrally arranged at the edge of the cutting end at least, and the positions of the three protruding parts are arranged in a non-collinear manner.
According to the technical scheme, when the blanking device is used, the cutting end of the cutter is used for punching the sheet metal part, then the protruding parts corresponding to the shapes of the plurality of protruding parts are formed at the blanking edge, the plurality of protruding parts are more easily abutted against the inner wall of the blanking hole, a plane is determined by three points, the supporting stability is high, the plurality of protruding parts are arranged in a non-collinear mode, the blanking is more favorably clamped into the blanking hole, and the blanking is prevented from popping out of the blanking hole; the cutter core and the cutter handle block can be detachably connected, so that the cutter core is convenient to replace to complete maintenance of the cutter, and the cost of replacement and maintenance of the cutter is reduced.
The present invention in a preferred example may be further configured to: the cross section of the convex part is semicircular.
Through above-mentioned technical scheme, the bulge cross section adopts semi-circular, alleviates the scraping between blanking and the blanking hole inner wall to a certain extent.
The present invention in a preferred example may be further configured to: the protruding part is along the length of the knife core is integrally arranged on the knife core.
Through the technical scheme, the punching tool core is beneficial to ensuring the size precision of punching and is convenient to process and manufacture.
The present invention in a preferred example may be further configured to: the end part of the cutting end is detachably connected with an elastic ejector rod.
Through the technical scheme, the elastic ejector rod is used for pushing away the blanking, so that the blanking is conveniently discharged from the blanking hole.
The present invention in a preferred example may be further configured to: the cutting end is internally threaded with a sliding sleeve, an elastic ejector rod is connected in the sliding sleeve in a sliding mode, and an elastic piece is clamped between the bottom of the sliding sleeve and the elastic ejector rod.
Through above-mentioned technical scheme, sliding sleeve threaded connection is convenient for dismantle and change elastic construction in cutting the end.
In summary, the invention includes at least one of the following beneficial technical effects:
(1) the plurality of the convex parts are arranged at the cutting end, so that the convex parts corresponding to the shapes of the plurality of the convex parts are formed at the blanking edge in the punching process, the plurality of the convex parts are more easily abutted against the inner wall of the blanking hole, and the plurality of the convex parts are arranged in a non-collinear manner due to the fact that a plane is determined by the three points and the supporting stability is strong, so that the blanking is more favorably clamped into the blanking hole, and the blanking is prevented from popping out of the blanking hole;
(2) furthermore, the high-pressure air pipe generates a swirling air flow in the blanking hole, so that the blanking is more favorably discharged from the blanking hole;
(3) furthermore, the elastic ejector rod is arranged at the cutting end, so that the cut blanking is conveniently ejected, the blanking is separated from the cutting end, and the blanking hole is discharged.
Drawings
FIG. 1 is a schematic flow diagram of a prior art punching process;
FIG. 2 is a schematic view of the structure of the processing apparatus of the present invention;
FIG. 3 is a schematic view of the overall structure of a cutter in the first embodiment;
FIG. 4 is a sectional view of the cutter in the second embodiment.
Reference numerals: 1. processing a frame; 2. a base plate; 3. a lower template; 4. punching a die; 5. a cutter; 6. a blanking hole; 7. a tool shank block; 8. a cutter core; 9. a displacement sensor; 10. a projection; 11. a locking member; 12. a high-pressure air pipe; 13. an electromagnetic switch; 14. a sliding sleeve; 15. an elastic ejector rod; 16. an elastic member.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
a sheet metal punching process comprises the steps of punching by a cutter 5, wherein a backing plate 2 is fixed on a processing frame 1, a lower template 3 is fixed on the backing plate 2, a punching die 4 is arranged on the lower template 3 in a lifting mode, the cutter 5 is fixed on the punching die 4, and a blanking hole 6 matched with the cutter 5 is formed in the lower template 3;
the cutter 5 comprises a cutter handle block 7 detachably mounted on the punching die 4 and a cutter core 8 detachably mounted in the cutter handle block 7, a jack penetrates through the cutter handle block 7, the cross section of the jack is completely matched with the cross section of the cutter core 8 so as to realize seamless insertion of the cutter core 8 in the jack, a locking part 11 used for locking the cutter core 8 into the cutter handle block 7 is arranged on the cutter handle block 7, the locking part 11 is an anti-falling screw pin and is in threaded connection with the cutter handle block 7, and the cutter core 8 is locked into the cutter handle block 7; one end of the knife core 8 extends out of the knife handle block 7 to form a cutting end, the edge of the cutting end of the knife 5 is at least integrally provided with three protruding parts 10, the three protruding parts 10 are taken as examples in the embodiment, the positions of the three protruding parts 10 are arranged in a non-collinear mode, the cross section shape of the knife core 8 is matched with the shape of a punched hole, the knife core can be special-shaped, the embodiment takes a round shape as examples, the circumferential arrays of the three protruding parts 10 are respectively arranged on the circumferential side of the cutting end, and the cross section of the protruding part 10 is semicircular.
The size setting of bulge 10 satisfies the dimensional error of punching process, and the machining precision of punching a hole for example is that diameter error is less than 0.2mm, then bulge 10 is not more than 0.1mm in the radial ascending distance of sword core 8 can, the requirement of the size of punching a hole can be satisfied in the aperture of processing like this, can also satisfy the existence of bulge 10.
During the use, punch 4 drives the punching press of cutter 5, treat that the panel beating of punching a hole is tiled on lower bolster 3, 8 cutting cores behind the panel beating, the area blanking gets into to blanking hole 6 in, because the setting of bulge 10, the actual shape of blanking has a plurality of semicircular lugs for circular edge, the blanking gets into blanking hole 6 back, the position that the blanking edge corresponds bulge 10 supports tightly with blanking hole 6 inner wall, and because the quantity of bulge 10 is greater than three but not be located same straight line, the blanking that the event got into in blanking hole 6 is difficult to pop out again to lower bolster 3 from blanking hole 6 in, cause the obstacle to follow-up processing.
The center of the graph formed by sequentially connecting the plurality of convex parts 10 is coincided with the center of the end face of the cutter core 8, taking the embodiment as an example, the three convex parts 10 distributed in the circumferential array are connected to form an equilateral triangle, and the centers of the three convex parts are just coincided with the circle center of the cutter core 8, so that the arrangement is realized, and the position of the corresponding convex part 10 of the blanking is utilized to provide more stable support for the blanking in the blanking hole 6.
The convex part 10 is integrally fixed on the cutter core 8 along the length of the cutter core 8, and has the function of increasing the cross section of the cutter core 8 and enhancing the strength of the cutter core 8; secondly, increase the area of contact between core 8 and the handle of a knife piece 7, the location of core 8 in handle of a knife piece 7 can be assisted to the bulge 10 that sets up, avoids core 8 to rock relative to handle of a knife piece 7.
A high-pressure air pipe 12 is installed in the blanking hole 6, an electromagnetic switch 13 is installed on the high-pressure air pipe 12, a displacement sensor 9 is installed on the stamping die 4, the displacement sensor 9 adopts a contact switch, and the displacement sensor 9 controls the electromagnetic switch 13 to work through signals. When the cutter 5 is inserted into the blanking hole 6, the upper end of the blanking hole 6 is blocked by the cutter core 8, the displacement sensor 9 starts the electromagnetic switch 13 to be opened, the high-pressure air pipe 12 is conducted, high-pressure air flow is blown into the blanking hole 6, and the high-pressure air flow forms backflow in the blanking hole 6, so that blanking is more favorably discharged from the lower end of the blanking hole 6;
under the state that cutter 5 left blanking hole 6, stop blowing in high-pressure draught to blanking hole 6 in, the essence of punching a hole is the cutting, and the cutting of metal panel beating is like the paper, and the in-process of paper cutting can produce the wastepaper, and the metal panel beating is also so, and through stopping blowing in high-pressure draught in time, the metallic debris that avoids the cutting to produce flies upward in the workshop, ensures the clean health of operational environment.
Example two:
as shown in fig. 4, the sheet metal punching process is different from the first embodiment in that a sliding sleeve 14 is connected to a cutting end through an internal thread, an elastic ejector rod 15 is connected to the sliding sleeve 14 in a sliding manner, an elastic member 16 is clamped between the bottom of the sliding sleeve 14 and the elastic ejector rod 15, and the elastic member 16 is a spring. In order to ensure that the cutter 5 is rustproof and can control a plurality of angles such as cutting powder, in the daily machining process, the cutter core 8 of the cutter 5 is ensured to be provided with oil, the prior art is provided with the oil, the oil exists between the blanking and the cutter core 8 after the cutter core 8 cuts the metal plate, the oil has tension, then the cutter core 8 is easy to carry the blanking out of the blanking hole 6, and the elastic ejector rod 15 is arranged to separate the blanking from the cutter core 8, so that the blanking is smoothly discharged from the blanking hole 6.
In summary, the following steps:
when the blanking device is used, the plurality of the convex parts 10 are arranged at the cutting end, in the punching process, the convex parts 10 corresponding to the shapes of the plurality of the convex parts 10 are formed at the blanking edge, the plurality of the convex parts 10 are more easily abutted against the inner wall of the blanking hole 6, and a plane is determined by three points, and the support stability is strong, the plurality of the convex parts 10 are arranged in a non-collinear manner, so that the blanking can be clamped into the blanking hole 6, and the blanking can be prevented from popping out of the blanking hole 6; the high-pressure air pipe 12 generates a swirling air flow in the blanking hole 6, so that blanking is more favorably discharged from the blanking hole; through set up elasticity ejector pin 15 at the cutting end, be convenient for push open the blanking that cuts down, the blanking separates with the cutting end to blanking hole 6 discharges.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. The utility model provides a panel beating process of punching a hole, includes that adopt cutter (5) to punch a hole the processing, its characterized in that, the cutting end edge of cutter (5) is provided with three bulge (10) at least, and is a plurality of the position of bulge (10) is the setting of collineation not.
2. The sheet metal punching process according to claim 1, wherein the cutter (5) comprises a handle block (7) and a cutter core (8) detachably arranged in the handle block (7), and one end of the cutter core (8) extends out of the handle block (7) to be provided with the protruding portion (10).
3. A sheet metal punching process according to claim 2, wherein the centre of the pattern formed by the successive projections (10) coincides with the centre of the end face of the core (8).
4. A sheet metal punching process according to claim 3, wherein the dimensions of the projections (10) are set to meet the dimensional tolerances of the punching process.
5. The sheet metal punching process according to claim 1, which is characterized by comprising a punching die (4) and a lower template (3), wherein the cutter (5) is fixed on the punching die (4), and the lower template (3) is provided with blanking holes (6);
when the cutter (5) is inserted into the blanking hole (6), blowing high-pressure airflow into the blanking hole (6);
and stopping blowing high-pressure air flow into the blanking hole (6) when the cutter (5) is away from the blanking hole (6).
6. The sheet metal punching cutter (5) is characterized by comprising a cutter handle block (7), wherein an insertion hole is formed in the cutter handle block (7) in a penetrating manner, a cutter core (8) is inserted and connected in the insertion hole, and a locking piece (11) used for locking the cutter core (8) into the cutter handle block (7) is arranged on the cutter handle block (7);
one end of the cutter core (8) extends out of the cutter handle block (7) to form a cutting end, at least three protruding parts (10) are integrally arranged on the edge of the cutting end, and the positions of the three protruding parts (10) are arranged in a non-collinear manner.
7. A sheet metal punching tool (5) according to claim 6, characterized in that the cross-section of the bulge (10) is semi-circular.
8. A sheet metal punching tool (5) according to claim 6, wherein the protrusion (10) is integrally provided on the core (8) along the length of the core (8).
9. A sheet metal punching tool (5) according to claim 8, wherein the end of the cutting end is detachably connected with an elastic ejector pin (15).
10. The sheet metal punching tool (5) according to claim 9, wherein a sliding sleeve (14) is connected to the cutting end in a threaded manner, an elastic ejector rod (15) is connected to the sliding sleeve (14) in a sliding manner, and an elastic element (16) is clamped between the bottom of the sliding sleeve (14) and the elastic ejector rod (15).
CN202010055007.9A 2020-01-17 2020-01-17 Sheet metal punching process and cutter thereof Withdrawn CN111229921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010055007.9A CN111229921A (en) 2020-01-17 2020-01-17 Sheet metal punching process and cutter thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010055007.9A CN111229921A (en) 2020-01-17 2020-01-17 Sheet metal punching process and cutter thereof

Publications (1)

Publication Number Publication Date
CN111229921A true CN111229921A (en) 2020-06-05

Family

ID=70874651

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010055007.9A Withdrawn CN111229921A (en) 2020-01-17 2020-01-17 Sheet metal punching process and cutter thereof

Country Status (1)

Country Link
CN (1) CN111229921A (en)

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Application publication date: 20200605

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