CN115178660B

CN115178660B - Forming method of sheet with lateral bulge and inclined surface

Info

Publication number: CN115178660B
Application number: CN202211094532.7A
Authority: CN
Inventors: 顾大明
Original assignee: Suzhou Mingfeng Precision Machinery Co ltd
Current assignee: Suzhou Mingfeng Precision Machinery Co ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-01-03
Anticipated expiration: 2042-09-08
Also published as: CN115178660A

Abstract

The invention belongs to the technical field of blanking processing, and relates to a method for forming a sheet with a lateral bulge and an inclined plane, which comprises the following steps: the method comprises the following steps of punching a positioning hole, beveling, trimming and blanking, wherein in the beveling step, a notch with an inclined plane is formed in a lateral cutting area, and then the lateral cutting area is completely cut from a material belt to form a section with a lateral bulge, and the inclined plane of the notch becomes a part of the lateral bulge. The steps of the method are completed in a set of continuous dies, the precision of the formed sheet with the side bulge and the inclined surface is high, no burr is generated, the production efficiency is high, and the product quality is guaranteed.

Description

Forming method of sheet with lateral bulge and inclined surface

Technical Field

The invention relates to the technical field of blanking processing, in particular to a forming method of a sheet with a lateral bulge and an inclined plane.

Background

Fig. 1 shows a thicker sheet 1 having a thickness of approximately 1mm and having two lateral projections 17 on one side thereof, the end faces of the lateral projections 17 being bevelled 171 and the rest being straight. In the punching process, a general method is to cut the structure in accordance with the contour of the product, leave a machining allowance on the end surface of the side projection 17, and then finish the end surface of the side projection 17 to form the inclined surface 171. The following problems exist with this approach:

(1) the end surface of the lateral bulge 17 is processed into an inclined surface 171 from a straight surface, burrs are easily generated on the edge, the quality is not easy to control, and the post-treatment is complicated;

(2) the product is cut into small blocks firstly and then is subjected to finish machining, the continuity is poor, and the improvement of the production efficiency is restricted.

It is therefore necessary to devise a new molding method for continuously manufacturing such a side lobe beveled sheet.

Disclosure of Invention

The main object of the present invention is to provide a method for molding a sheet with a slope having a side projection, which can continuously manufacture the sheet with a slope having a side projection.

The invention realizes the purpose through the following technical scheme: a method for forming a sheet with a lateral bulge and a bevel comprises the following steps:

(1) punching a positioning hole: the method comprises the following steps that a first positioning hole and a second positioning hole are cut in the range of a processing unit by taking the bottom surface and a first side edge of a material belt as references, the opposite side edge of the first side edge is a second side edge, the range of the processing unit comprises a product retaining area close to the first side edge, a lateral cutting area close to the second side edge and a connecting area located between adjacent product retaining areas in design, the first positioning hole is located in the lateral cutting area, and the second positioning hole is located in the connecting area;

(2) beveling: a notch is obliquely cut on the second side edge by taking the bottom surface, the first side edge and the first positioning hole of the material belt as references, the surface opposite to the first side edge in the notch is an inclined surface forming an acute angle with the bottom surface of the material belt, and the notch is positioned in the range of the lateral cutting area and is not overlapped with the first positioning hole;

(3) trimming: completely cutting the lateral cutting area from the material belt by taking the bottom surface, the first side edge and the second positioning hole of the material belt as references to form a cross section with a lateral bulge, wherein the inclined plane of the notch becomes a part of the lateral bulge;

(4) blanking: and cutting off the connecting area by taking the bottom surface, the first side edge and the cross section of the material belt as references, and allowing the sheet material to fall.

Specifically, both the positioning hole punching step and the beveling step are performed with both sides of a pair of floating limiting columns, the limiting columns are provided with side grooves, and the first side edge or the second side edge is limited in the side grooves.

Specifically, the positioning hole punching step to the trimming step all use a reference block close to the first side edge as a reference of the first side edge, and the other side of the reference block abuts against the second side edge through a wedge mechanism so that the first side edge abuts against the reference block.

Specifically, in the beveling step, a support block with a notch groove and a pressing block positioned above the support block are used for height positioning, and an inclined punch penetrating through the pressing block is used for punching the material of the notch and falling into the notch groove.

Specifically, a punching step is further provided between the beveling step and the trimming step, and in the punching step, a plurality of through holes are cut at the boundary between the product retention area and the connecting area by using a through hole punch based on the bottom surface, the first side edge and the notch of the material belt.

The technical scheme of the invention has the beneficial effects that:

the method has the advantages that the steps are completed in a set of continuous dies, the precision of the formed sheet with the lateral bulge and the inclined plane is high, no burr is generated, the production efficiency is high, and the product quality is guaranteed.

Drawings

FIG. 1 is a structural view of a sheet;

FIG. 2 is a sequence chart of the change of the tape (the cut part of the tape in the step is shown in black);

fig. 3 is a diagram of the relationship between the main components of the mold and the tape.

Labeled in the figure as:

1-sheet, 10-tape, 11-first side, 12-second side, 13-product retention area, 14-lateral cut-out area, 141-first positioning hole, 142-notch, 15-connection area, 151-second positioning hole, 16-through hole, 17-lateral protrusion, 171-inclined plane, 18-section;

2-a limit column;

31-reference block, 32-wedge mechanism;

41-a first punch, 42-a second punch;

51-support block, 52-pressing block and 53-inclined punch;

6, trimming a punch;

7-blanking punch;

81-notch positioning punch and 82-through hole punch.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example (b):

the invention discloses a method for forming a sheet with a lateral bulge and an inclined plane, which comprises the following steps:

(1) punching a positioning hole: as shown in fig. 2 and 3, with the bottom surface and the first side edge 11 of the tape 10 as references, a first positioning hole 141 and a second positioning hole 151 are cut out within the processing unit range, the opposite side edge of the first side edge 11 is the second side edge 12, the processing unit range includes a product retention area 13 near the first side edge 11, a lateral cut-out area 14 near the second side edge 12, and a connecting area 15 located between adjacent product retention areas 13 in the design, the first positioning hole 141 is located in the lateral cut-out area 14, and the second positioning hole 151 is located in the connecting area 15.

The material of the product retention area 13 is used to form the sheet 1. This step cuts out the first positioning hole 141 with the first punch 41. The lateral cut-out 14 in which the first positioning hole 141 is located outside the upper side projection 17 of the sheet material 1, and therefore is mainly used as a reference for lateral blanking. This step cuts the second positioning hole 151 with the second punch 42. The second positioning hole 151 is mainly used for positioning the length direction of the material tape 10.

(2) Beveling: as shown in fig. 2 and 3, a notch 142 is obliquely cut in the second side edge 12 based on the bottom surface of the tape 10, the first side edge 11 and the first positioning hole 141, a surface of the notch 142 opposite to the first side edge 11 is an inclined surface 171 forming an acute angle with the bottom surface of the tape 10, and the notch 142 is located in the lateral cut-out region 14 and does not overlap with the first positioning hole 141.

Although the inclined surface 171 is located on the lateral protrusion 17 on the sheet 1, the inclined surface 171 is located at the concave notch 142 during the processing, and burrs are not easily formed when the notch 142 is punched. The straight profile of the side projections 17 is set back.

The chamfering step is performed using a bracket 51 having a notch groove and a pressing block 52 located above the bracket 51 for height positioning, and the material of the notch 142 is punched out and dropped into the notch groove using an inclined punch 53 passing through the pressing block 52. This bevel arrangement allows the scrap to be discharged into the lower projection area of the strip 10 so that scrap build-up does not interfere with the die cutting operation. In this embodiment, two sets of beveling structures are used because the sheeting 1 has two lateral projections 17 and each lateral projection 17 has a bevel 171. If the number of side projections 17 and ramps 171 varies, the mold will vary accordingly.

(3) Punching: as shown in fig. 2 and 3, two through holes 16 are cut with a through hole punch at the boundary of the product retention area 13 and the connecting area 15, with reference to the bottom surface of the strip of material 10, the first side edge 11 and the notch 142.

In the punching step, the limiting column 2 is used for propping against the first side 11 on one side, the notch positioning punch 81 is used for positioning the notch 142 on the other side, then the through hole 16 is cut by the through hole punch 82, and the notch 142 is a laterally concave structure, so that the notch 142 can be used as a positioning reference for the relative position of the first side 11 in the step because the notch 142 has higher precision. The local contour of the through hole 16 is a part of the contour of the sheet material 1, but the direct blanking formation is easy to generate burrs, the through hole 16 structure is formed firstly, and then the cutting edge is cleaner. This step can also be omitted if the contour of the sheet 1 does not have such a location on which burrs easily occur.

(4) Trimming: as shown in fig. 2 and 3, the side cut-out region 14 is completely cut out from the tape 10 based on the bottom surface of the tape 10, the first side edge 11 and the second positioning hole 151, so as to form a cross section 18 having the side protrusion 17, and the slope of the notch 142 is a part of the side protrusion 17.

The trimming step is a process of vertically cutting off the material strip 10 by using the trimming punch 6, the formed section 18 is a straight surface, and redundant burrs cannot be generated after redundant parts on two sides of the notch 142 are punched.

(5) Blanking: as shown in fig. 2 and 3, the attachment area 15 is cut away, with reference to the bottom surface, first side edge 11 and cross-section 18 of the strip 10, to allow the sheet 1 to fall.

After the completion of the above processing, the connecting area 15 completes its function, so the sheet 1 is dropped by cutting the connecting area 15 with the blanking punch 7.

In conclusion, the steps can be completed in a set of continuous dies, the sheet 1 with the inclined surface 171 of the side protrusion 17 is formed with high precision and no burr, the production efficiency is high, and the product quality is guaranteed.

As shown in fig. 3, the positioning hole punching step and the beveling step both perform two-side limitation by using a pair of floating limiting posts 2, the limiting posts 2 have side grooves (not exposed), and the first side 11 or the second side 12 is limited in the side grooves. The limiting columns 2 are floating parts arranged on the lower die, all side grooves are in equal height states, the two limiting columns 2 form a group and are respectively positioned outside the first side edge 11 and the second side edge 12 of the material belt 10, and therefore the material belt 10 is limited in a relatively determined range by the limiting columns 2 during conveying. When the die is closed, all the limiting columns 2 are pressed down by the upper die together, and the material belt 10 is also driven to descend until the bottom surface of the material belt 10 finds a bottom datum.

As shown in fig. 3, the positioning hole punching step through the trimming step use a datum block 31 adjacent to the first side edge 11 as a datum for the first side edge 11, and the other side of the datum block 31 abuts against the second side edge 12 through a wedge mechanism 32 so that the first side edge 11 abuts against the datum block 31. The position of the reference block 31 is unchanged, the inclined wedge mechanism 32 is a mechanism which pushes the material belt 10 to the direction of the reference block 31 from the side by utilizing the cooperation of an inclined punch and a lateral pushing block, and after die assembly is carried out, the reference block 31 and the lateral pushing block clamp the material belt 10 together, so that the material belt 10 cannot move randomly during punching.

What has been described above are merely some of the embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.

Claims

1. A forming method of a sheet with a lateral bulge and an inclined plane is characterized in that: the method comprises the following steps:

(1) punching a positioning hole: with the bottom surface and a first side edge (11) of a material belt (10) as references, cutting a first positioning hole (141) and a second positioning hole (151) in a processing unit range, wherein the opposite side edge of the first side edge (11) is a second side edge (12), the processing unit range comprises a product retaining area (13) close to the first side edge (11), a lateral cutting area (14) close to the second side edge (12) and a connecting area (15) located between the adjacent product retaining areas (13) in design, the first positioning hole (141) is located in the lateral cutting area (14), and the second positioning hole (151) is located in the connecting area (15);

(2) beveling: with the bottom surface, the first side edge (11) and the first positioning hole (141) of the material belt (10) as references, a notch (142) is obliquely cut on the second side edge (12), the surface, opposite to the first side edge (11), in the notch (142) is an inclined surface (171) forming an acute angle with the bottom surface of the material belt, and the notch (142) is located in the range of the lateral cut-off area (14) and does not overlap with the first positioning hole (141);

(3) trimming: completely cutting the lateral cut-out area (14) from the tape (10) by taking the bottom surface, the first side edge (11) and the second positioning hole (151) of the tape (10) as references to form a cross section (18) with a lateral protrusion (17), wherein the inclined surface (171) of the notch (142) becomes a part of the lateral protrusion (17);

(4) blanking: the connecting region (15) is cut off, based on the bottom, the first side (11) and the cross-section (18) of the strip (10), and the sheet (1) is dropped.

2. The method of forming a side raised beveled sheet of claim 1, wherein: the positioning hole punching step and the beveling step are both limited at two sides by pairs of floating limiting columns (2), the limiting columns (2) are provided with side grooves, and the first side edge (11) or the second side edge (12) is limited in the side grooves.

3. The method of forming a side raised beveled sheet of claim 1, wherein: the positioning hole punching step and the trimming step both use a reference block (31) close to the first side edge (11) as a reference of the first side edge (11), and the other side of the reference block (31) abuts against the second side edge (12) through a wedge mechanism (32) so that the first side edge (11) abuts against the reference block (31).

4. The method of forming a side raised beveled sheet of claim 1, wherein: the beveling step adopts a support block (51) with a notch groove and a pressing block (52) positioned above the support block (51) for height positioning, and adopts an inclined punch head (53) penetrating through the pressing block (52) to break the material of the notch (142) and fall into the notch groove.

5. The method of forming a side raised beveled sheet of claim 1, wherein: and a punching step is also arranged between the beveling step and the trimming step, and a plurality of through holes (16) are cut at the boundary of the product retaining area (13) and the connecting area (15) by a through hole punch (82) by taking the bottom surface, the first side edge (11) and the notch (142) of the material belt (10) as reference.