CN111036759B - Machining process capable of ensuring flatness of thin plate after sand punching and broaching - Google Patents
Machining process capable of ensuring flatness of thin plate after sand punching and broaching Download PDFInfo
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- CN111036759B CN111036759B CN201911189984.1A CN201911189984A CN111036759B CN 111036759 B CN111036759 B CN 111036759B CN 201911189984 A CN201911189984 A CN 201911189984A CN 111036759 B CN111036759 B CN 111036759B
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- hole
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- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
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- 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
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Abstract
A processing technology capable of ensuring flatness of a thin plate after sand punching and broaching comprises the following steps: firstly, punching a stress release hole corresponding to a processing position of a salad hole; the pull hole is at least positioned at one side of the strip hole far away from the edge of the plate; each stress release hole is positioned in the processing station of the long holes and is arranged in the same straight line along the length direction of the stress release holes; secondly, blanking the salad hole for the first time; thirdly, blanking a long strip hole, wherein a distance is kept between the long strip hole and each salad hole positioned on the two sides of the long strip hole in the width direction; fourthly, blanking the salad hole for the second time; fifthly, the two ends corresponding to the length direction of the strip hole are respectively pressed with an imprinting line, the imprinting line extends along the width direction of the strip hole, and the imprinting line is located on one side, away from the edge of the plate, of the strip hole. The invention can eliminate the sand-blasting holes and the strip holes of the thin plate, particularly the S-shaped deformation of the long edge of the product caused by the stress concentration after the sand-blasting holes are punched, the process is ingenious and easy to implement, the processed plate has high flatness, and the requirements of customers can be met, thus the invention has higher industrial value.
Description
Technical Field
The invention relates to the technical field of sheet metal machining, in particular to a machining process for ensuring flatness of a thin plate after sand punching.
Background
At present, in plate processing, the processing difficulty of a thin plate is generally higher. The thin plate has a small thickness, so that how to ensure the flatness is a difficult point needing attention in the process of punching a salad hole and a long hole.
As shown in fig. 1, the product is a thin plate, and the requirements are as follows: two long holes are arranged near the edge of the product, and 8PCS CSK holes (salad holes) are arranged on the small face. The traditional processing technology aiming at the product is as follows: punching the front surface, punching the back surface and punching a long hole. Because one edge of the thin plate product is provided with two strip holes, and each salad hole is close to the edge, a large amount of stress is collected in the plate after the salad holes are punched, and the stress is released after the strip holes are punched, so that the product is deformed.
In summary, when the thin plate is processed by the existing processing technology, the deformation and distortion of the plate after the sand-pulling hole punching and the long hole punching are caused by the uneven stress distribution of the thin plate, so that the flatness of the processed thin plate cannot reach the standard.
Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.
Disclosure of Invention
The invention aims to provide a processing technology capable of ensuring flatness of a thin plate after sand-broaching.
In order to achieve the purpose, the invention adopts the technical scheme that:
a processing technology capable of ensuring flatness of a thin plate after sand punching and broaching comprises the following steps:
step one, respectively blanking a stress release hole on a plate corresponding to the processing position of each salad hole;
each salad hole is at least positioned on one side of the processing position of one strip hole, which is far away from the edge of the plate in the width direction; each stress release hole is positioned in the processing station of the long holes and is arranged in the same straight line along the length direction of the long holes;
secondly, performing primary blanking on the salad holes at the processing positions of the salad holes, wherein the primary blanking is performed on the surface of one side of the corresponding plate;
thirdly, blanking the strip holes, wherein the positions of the strip holes cover all the stress release holes, and a distance is kept between the strip holes and each salad hole positioned on two sides of the strip holes in the width direction;
fourthly, performing secondary blanking on each salad hole, wherein the secondary blanking is performed on the surface of the other side of the corresponding plate;
and fifthly, pressing an engraving line respectively corresponding to two ends of the long strip hole in the length direction, wherein the engraving line is arranged along the width direction of the long strip hole and is positioned on one side of the long strip hole, which is far away from the edge of the plate.
The relevant content in the above technical solution is explained as follows:
1. in the above scheme, in the first step, each of the salad holes is located on both sides of the processing position in the width direction of the strip hole, and the distance from the salad hole adjacent to one side of the edge of the plate to the edge is the same as the distance from the salad hole to the corresponding stress release hole.
2. In the above scheme, in the first step, the stress release hole is crescent or curved.
3. In the scheme, the stress release hole is crescent, the arc length of the stress release hole is 1/4 circles, and the hole width is 2T; the distance between the stress release hole and the center of the corresponding salad hole is 8-10T.
4. In the scheme, after the step four, the sheet material is punched to form the outline of the product.
5. In the above scheme, in the fifth step, the length of the imprinting line is 20mm, and the depth is 0.2T; the cross section of the marking line is in an inverted trapezoid shape, the width of the bottom of the marking line is 0.1T, and the included angle between two oblique edges of the marking line is 60 degrees.
The working principle and the advantages of the invention are as follows:
the invention relates to a processing technology capable of ensuring flatness of a thin plate after sand punching and broaching, which comprises the following steps: firstly, punching a stress release hole corresponding to a processing position of a salad hole; the pull hole is at least positioned at one side of the strip hole far away from the edge of the plate; each stress release hole is positioned in the processing station of the long holes and is arranged in the same straight line along the length direction of the stress release holes; secondly, blanking the salad hole for the first time; thirdly, blanking a long strip hole, wherein a distance is kept between the long strip hole and each salad hole positioned on the two sides of the long strip hole in the width direction; fourthly, blanking the salad hole for the second time; fifthly, the two ends corresponding to the length direction of the strip hole are respectively pressed with an imprinting line, the imprinting line extends along the width direction of the strip hole, and the imprinting line is located on one side, away from the edge of the plate, of the strip hole.
Compared with the prior art, the method can eliminate the sand-blasting holes and the long holes of the thin plate, and particularly eliminate S-shaped deformation of the long edge of the product caused by stress concentration after sand-blasting, so that the method is ingenious in process and easy to implement, the processed plate is high in flatness, the requirements of customers can be met, and the method has high industrial value.
Drawings
FIG. 1 is a schematic structural view of a thin sheet product according to the present invention;
FIG. 2 is a schematic diagram of a product of step one in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a product obtained in step two according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of a product obtained in step three according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a product obtained in step four according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a product obtained in step five according to an embodiment of the present invention.
FIG. 7 is a schematic cross-sectional view of line printing at the fifth moment in the embodiment of the present invention.
In the above drawings: 1. a plate material; 2. a salad hole; 3. a stress release hole; 4. a strip hole; 5. an edge; 6. producing a product; 7. marking lines; 8. and a long side.
Detailed Description
The invention is further described with reference to the following figures and examples:
example (b): the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.
The terms "first," "second," and the like, as used herein, do not denote any order or importance, nor do they denote any order or importance, but rather are used to distinguish one element from another element or operation described in such technical terms.
As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.
As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.
Referring to the attached drawings 2-6, a processing technology capable of ensuring flatness of a thin plate after sand punching and broaching, comprises the following steps:
step one, respectively punching a stress release hole 3 on the plate 1 corresponding to the processing position of each salad hole 2, wherein the stress release hole is used for releasing stress when the salad holes 2 are punched.
Wherein, each salad hole 2 is at least positioned at one side of the processing position width direction of a strip hole 4 far away from the edge 5 of the plate 1; each of the stress release holes 3 is located in a processing position of the elongated hole 4, and is aligned in a straight line along a length direction of the elongated hole 4 (i.e., a length direction of the plate material 1).
Preferably, each salad hole 2 is located on two sides of the width direction of the processing position of the strip hole 4, and the distance from the salad hole 2 adjacent to one side of the edge 5 of the plate 1 to the edge 5 is the same as the distance from the salad hole 2 to the corresponding stress release hole 3, so that stress can be offset, and the deformation of the plate 1 is reduced or even avoided.
Wherein, the stress release hole 3 is crescent or curved. But is not limited thereto, and may be other shapes symmetrical around the salad hole 2.
Preferably, the stress release hole 3 is crescent-shaped, the arc length is 1/4 circles, and the hole width is 2T; the distance between the stress release hole 3 and the center of the corresponding salad hole 2 is 8-10T, wherein T represents the thickness of the plate 1.
And step two, performing primary blanking on the salad holes 2 at the processing positions of the salad holes 2, wherein the primary blanking is performed corresponding to one side surface (such as the back surface of the plate 1) of the plate 1. The first blanking is intended to reduce the amount of deformation of the plate material 1 during the second blanking, thereby reducing the occurrence of stress.
Thirdly, blanking the strip hole 4, wherein the position of the strip hole 4 covers all the stress release holes 3, and then removing all the stress release holes 3, and all the strip holes 4 keep a distance from each salad hole 2 positioned at two sides of the strip hole in the width direction; the requirement of the distance is specifically determined by the characteristics of a client product, and a preferable embodiment is that the distance from the salad hole 2 adjacent to one side of the edge 5 of the plate 1 to the strip hole 4 is the same as the distance from the salad hole 2 adjacent to the side to the edge 5, so that the stress is offset, and the deformation of the plate 1 is reduced or even avoided.
Thereafter, the sheet 1 is stamped to its contour so that its contour forms the contour of the product 6.
And fourthly, performing secondary blanking on each salad hole 2, wherein the secondary blanking is performed corresponding to the other side surface (such as the front surface of the plate 1) of the plate 1.
And fifthly, pressing an imprinting line 7 at two ends of the long hole 4 in the length direction respectively, wherein the imprinting line 7 is arranged along the width direction of the long hole 4 and is positioned at one side of the long hole 4 far away from the edge 5 of the plate 1.
Preferably, the length of the imprinting line 7 is 20mm, and the depth is 0.2T; the cross section of the engraving line 7 is in an inverted trapezoid shape, the width of the bottom of the engraving line is 0.1T, and the included angle between two inclined edges of the engraving line is 60 degrees.
Through the design of the imprinting line 7, the imprinting line 7 can extend along the width direction, so that the stress change of the long edge of the plate 1 after the long edge is punched with the long strip hole 4 can be adapted, and the phenomenon that the whole long edge 8 of the final product 6 is bent after the long edge 8 is lengthened is further solved; specifically, the surface of the plate 1 can be opened for a certain distance by printing the marking lines 7, so that the plate 1 is elongated, and the long sides 8 are straightened to overcome deformation.
Compared with the prior art, the method can eliminate the sand-blasting holes and the long holes of the thin plate, and particularly eliminate S-shaped deformation of the long edge of the product caused by stress concentration after sand-blasting, so that the method is ingenious in process and easy to implement, the processed plate is high in flatness, the requirements of customers can be met, and the method has high industrial value.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (7)
1. A processing technology capable of ensuring flatness of a thin plate after sand punching and broaching is characterized by comprising the following steps: the method comprises the following steps:
step one, respectively blanking a stress release hole on a plate corresponding to the processing position of each salad hole;
each salad hole is at least positioned on one side of the processing position of one strip hole, which is far away from the edge of the plate in the width direction; each stress release hole is positioned in the processing station of the long holes and is arranged in the same straight line along the length direction of the long holes;
secondly, performing primary blanking on the salad holes at the processing positions of the salad holes, wherein the primary blanking is performed on the surface of one side of the corresponding plate;
blanking the strip holes, wherein the positions of the strip holes cover all the stress release holes, and a distance is kept between the strip holes and each salad hole;
fourthly, performing secondary blanking on each salad hole, wherein the secondary blanking is performed on the surface of the other side of the corresponding plate;
and fifthly, pressing an engraving line respectively corresponding to two ends of the long strip hole in the length direction, wherein the engraving line is arranged along the width direction of the long strip hole and is positioned on one side of the long strip hole, which is far away from the edge of the plate.
2. The process of claim 1, wherein: in the first step, each salad hole is positioned at two sides of the width direction of the processing position of the strip hole, and the distance from the salad hole adjacent to one side of the edge of the plate to the edge is the same as the distance from the salad hole to the corresponding stress release hole.
3. The process according to claim 1 or 2, characterized in that: in the first step, the shape of the stress release hole is a curve.
4. The process of claim 3, wherein: the stress release hole is crescent.
5. The process of claim 4, wherein: the arc length of the stress release hole is 1/4 circles, the hole width is 2T, and T is the sheet thickness of the plate; the distance between the stress release hole and the center of the corresponding salad hole is 8-10T.
6. The process of claim 1, wherein: and after the fourth step, punching the shape of the plate to enable the shape profile to form the shape profile of the product.
7. The process of claim 1, wherein: in the fifth step, the length of the imprinting line is 20mm, the depth is 0.2T, and T is the sheet thickness of the plate; the cross section of the marking line is in an inverted trapezoid shape, the width of the bottom of the marking line is 0.1T, and the included angle between two oblique edges of the marking line is 60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911189984.1A CN111036759B (en) | 2019-11-28 | 2019-11-28 | Machining process capable of ensuring flatness of thin plate after sand punching and broaching |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911189984.1A CN111036759B (en) | 2019-11-28 | 2019-11-28 | Machining process capable of ensuring flatness of thin plate after sand punching and broaching |
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| Publication Number | Publication Date |
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| CN111036759A CN111036759A (en) | 2020-04-21 |
| CN111036759B true CN111036759B (en) | 2021-08-31 |
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| CN201911189984.1A Active CN111036759B (en) | 2019-11-28 | 2019-11-28 | Machining process capable of ensuring flatness of thin plate after sand punching and broaching |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112588957A (en) * | 2020-12-28 | 2021-04-02 | 天津市津兆机电开发有限公司 | Processing method for non-lap-joint full-circumference chamfer of annular porous stamping part |
| CN112756470A (en) * | 2020-12-28 | 2021-05-07 | 珠海加特精密工业有限公司 | Blanking processing method and device |
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| JPH08288163A (en) * | 1995-04-13 | 1996-11-01 | Mitsui High Tec Inc | Manufacturing method for rotor iron core |
| CN2500406Y (en) * | 2001-07-23 | 2002-07-17 | 联想(北京)有限公司 | Stress releasing hole of metallic stamping pieces |
| CN101322990A (en) * | 2008-07-21 | 2008-12-17 | 北京康迪普瑞模具技术有限公司 | Press forming and processing method for saving motor stator and rotor material as well as device |
| JP5145689B2 (en) * | 2006-10-30 | 2013-02-20 | 新日鐵住金株式会社 | Blank for press molding of hat-shaped metal parts |
| CN105964782A (en) * | 2016-06-08 | 2016-09-28 | 深圳市信维通信股份有限公司 | Shielding cover frame and manufacturing process thereof |
| CN106216489A (en) * | 2016-08-01 | 2016-12-14 | 钜祥精密模具（苏州）有限公司 | A kind of back of the body male counter sink moulding process |
| CN209094329U (en) * | 2018-11-13 | 2019-07-12 | 昆山榕美电子科技有限公司 | Plate stamping part in mobile phone |
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2019
- 2019-11-28 CN CN201911189984.1A patent/CN111036759B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08288163A (en) * | 1995-04-13 | 1996-11-01 | Mitsui High Tec Inc | Manufacturing method for rotor iron core |
| CN2500406Y (en) * | 2001-07-23 | 2002-07-17 | 联想(北京)有限公司 | Stress releasing hole of metallic stamping pieces |
| JP5145689B2 (en) * | 2006-10-30 | 2013-02-20 | 新日鐵住金株式会社 | Blank for press molding of hat-shaped metal parts |
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