CN100446913C - Bent machining method for metal plate - Google Patents
Bent machining method for metal plate Download PDFInfo
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- CN100446913C CN100446913C CNB2005100588673A CN200510058867A CN100446913C CN 100446913 C CN100446913 C CN 100446913C CN B2005100588673 A CNB2005100588673 A CN B2005100588673A CN 200510058867 A CN200510058867 A CN 200510058867A CN 100446913 C CN100446913 C CN 100446913C
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Abstract
The present invention relates to a bending making method of a metal plate. The integrated process of cold extrusion for two times and metal cutting processing is used to achieve that the shape of a punching component has no arc chord angle, and thus, the bending external surface of the component is a right angle. The metal plate, the thickness of which is not bigger than three mm, is low carbon steel, copper, copper alloy, aluminum, aluminum alloy, or other non-ferrous metal, the hardness of which is low. The 'sequelae' that the outer surface of the metal plate after bending processing has an arc chord angle for years is better solved by the present invention, and the design requirement that the bending shape of the punching component has no arc chord angle can be achieved. The present invention provides a process technical method which has the advantages of simplicity, easy operation and low cost for industries, such as, IT products, household appliance, etc., with higher appearance requirements, such as cell phones, palm computers, MP3, etc. The design of the appearance moulding or structural components of the products is more delicate and beautiful.
Description
Technical field
The present invention relates to a kind of crooked manufacture method of metallic plate, exactly, the crooked outer surface that relates to the metallic plate after a kind of bending machining is the crooked manufacture method at right angle, belongs to the rolling technical field of metal.
Background technology
As everyone knows, the processing of the bending ram of metallic plate is a kind of traditional mechanical technology of extensive employing, and it is to utilize the mechanical property of metal material plastic deformation and the processing performance of drawing-down distortion, the bending machining of on pressing equipment and mould metallic plate being carried out.Because plastic deformation of metal material is, after bending ram processing, metallic plate can leave an arc chord angle inevitably on the outer surface of its bending ram deformation place.Fig. 1 (A), (B) have showed two kinds of conventional bending machining process schematic representations that do not adopt pressing plate (its concave, convex mould 1,2 is V-structure) and adopt the sheet metal of pressing plate 3 (this pressing plate 3 is positioned at die 1 middle cavity downside) respectively.Under the pressure effect of convex concave mould 2,1 up and down, after metallic plate 10 (use hatching among the figure) the generation flexural deformation under two kinds of situations, all can leave arc chord angle R (referring to Fig. 2) on the outer surface of its deformation place.And the size at the least radius place of this arc chord angle R is 0.5 times of material thickness usually, becomes the weakest part of intensity of this hardware.Because this cylindrical arc angle of standard machinery product is for the performance and the use of hardware, usually there is not any too big harmful effect, therefore, metallic plate leaves arc chord angle after bending machining punching press " sequelae " follows so far always, does not cause special concern.
But, progress and development of science and technology along with society, many new products with dynamo-electric field of high-tech content, especially some novel electron products propose the new demand of many appearance designs or Mechanical Builds aspect to the bending ram member of metallic plate, in many occasions, metallic plate leaves arc chord angle R after bending machining architectural feature is unallowed.For example use the dog of commonplace clamping member at present, just can not leave fillet, otherwise just can not realize that the sealing of chimeric clip connects effect.Therefore, how this conventional fabrication processes is improved, just become the new problem of insider's research.
Summary of the invention
In view of this, the crooked manufacture method that the purpose of this invention is to provide a kind of metallic plate, use this method, can solve the defective of existing Sheet Metal Forming Technology, the outer surface of realization metal stamping member does not have the designing requirement of arc chord angle, can satisfy some modern electronic products to the appearance design of metallic plate punching press bending member or the specific (special) requirements on the Mechanical Builds.
In order to achieve the above object, the invention provides a kind of crooked manufacture method of metallic plate, its technical scheme is: after adopting twice cold extrusion, carry out the composite technology of metal cutting processing again, realize that the profile of punching press member does not have arc chord angle, promptly the crooked outer surface of this member is the right angle; Comprise following process:
(1) adopt punch press and cold-extrusion technology that metallic plate is carried out the bending machining first time: the metallic plate extruding to be bent into 45 ± 5 degree, and to squeeze out a small stair at its crooked position;
(2) adopt punch press and cold-extrusion technology that metallic plate is carried out bending machining for the second time: the metallic plate that will be bent into 45 ± 5 degree continues extrusion molding, is about to the metallic plate extruding and is bent into 90 ± 3 degree;
(3) adopt Metal Cutting Machine Tool that the curved end face of metallic plate is carried out machining: after utilizing anchor clamps fixing, the metallic plate outer surface of bending forming is carried out machining, make the curved end face of this metallic plate smooth, smooth, corner angle are clearly demarcated, the cylindrical arc angle be visually 0 the degree.
The height of the small stair that squeezes out at the metallic plate crooked position in the described step (1) is 0.15 to 0.20 times of this plate thickness, and at this moment, the horizontal clearance of the small stair moulding section of concave, convex two moulds of mould is less than the thickness of this metallic plate.
Gap between two moulds of the concave, convex that pushes in the described step (2) is identical with the thickness of this metallic plate, so that the plastic deformation that this metallic plate carries out between two extrusion dies has sufficient room, avoids producing the cylindrical arc angle.
In the described step (3) cutting output of the machining of the curved end face of metallic plate is greater than 0.05 millimeter of the height of described small stair.
Described metallic plate is mild steel, copper, copper alloy, aluminium, aluminium alloy or the lower non-ferrous metal of other hardness.
When described metallic plate is middle and high carbon steel, when this metallic plate being carried out twice cold extrusion bending machining of preceding two process, preheat metallic plate earlier, heating-up temperature is 300～500 degree Celsius.
The thickness of described metallic plate is not more than 3 millimeters.
In order to achieve the above object, the present invention also provides a kind of crooked manufacture method of metallic plate, it is characterized in that: after adopting twice cold extrusion, carry out the composite technology of metal cutting processing again, the profile of realization punching press member does not have arc chord angle, and promptly the angle on target of the crooked outer surface of this member is 45～90 degree; Comprise following process:
(1) adopt punch press and cold-extrusion technology that metallic plate is carried out bending machining for the first time: metallic plate to be pushed half that bends to angle on target, and squeeze out a small stair at its crooked position;
(2) adopt punch press and cold-extrusion technology that metallic plate is carried out bending machining for the second time: half the metallic plate that will be bent into angle on target continues extrusion molding, and the metallic plate extruding is bent into angle on target ± 3 degree;
(3) adopt Metal Cutting Machine Tool that the curved end face of metallic plate is carried out machining: after utilizing anchor clamps fixing, the metallic plate outer surface of bending forming is carried out machining, make the curved end face of this metallic plate smooth, smooth, corner angle are clearly demarcated, the cylindrical arc angle be visually 0 the degree.
Manufacture method of the present invention has solved " sequelae " that metallic plate outer surface after the bending machining for many years leaves arc chord angle preferably, can realize that punching press member curved profile do not have the designing requirement of arc chord angle, for such as higher industries of appearance requirement such as IT products such as mobile phone, palm PC, MP3 and household appliances, a kind of technology means simple, with low cost are provided, have made that the design of the appearance and modeling of product or constitutional detail is exquisite, attractive in appearance more.
Description of drawings
Fig. 1 (A), (B) are respectively two kinds of bending machining (no pressing plate and have pressing plate) method schematic diagrames of existing metallic plate.
Fig. 2 is the schematic diagram that its crooked outer surface leaves arc chord angle after the existing metallic plate bending machining.
To be respectively sheet-metal work successively adopt change of shape schematic diagram in three process of twice extruding and metal cutting in the present invention for Fig. 3 (A), (B), (C), (D).
Fig. 4 is that the present invention carries out pushing for the first time the technological operation schematic diagram of bending machining.
Fig. 5 (A), (B) are the technological operation schematic diagrames that the present invention carries out pushing for the second time the bending machining front and back.
Fig. 6 (A), (B) are respectively vertical view and the cutaway views that utilizes the embodiment workpiece that the present invention processes.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 3～Fig. 5, introduce the crooked manufacture method of metallic plate of the present invention, it is the composite technology that successively adopts twice cold extrusion and metal cutting processing, realizes that the profile of punching press member does not have arc chord angle, promptly the crooked outer surface of this member is the right angle; This method comprises following process:
(1) adopt punch press and cold-extrusion technology that metallic plate 10 is carried out the bending machining first time: metallic plate 10 extruding are bent into 45 ± 5 degree, and the metallic plate flexural deformation position that marks with circle in the drawings to squeeze out a small stair 11; The height of this small stair 11 is 0.15 to 0.20 times of these metallic plate 10 thickness t, this moment extrusion die concave, convex two moulds 1,2 small stair moulding sections horizontal clearance p less than the thickness t of this metallic plate 10 (and Fig. 4) referring to Fig. 3 (A).
(2) adopt punch press and cold-extrusion technology that metallic plate 10 is carried out bending machining for the second time: the metallic plate 10 that will be bent into 45 ± 5 degree continues extrusion molding, is about to the metallic plate extruding and is bent into 90 ± 3 degree; Gap between two male and female molds 1,2 of this moment extruding is identical with the thickness t of this metallic plate 10, makes this metallic plate can carry out sufficient plastic deformation between two extrusion dies, can not produce the cylindrical arc angle (referring to Fig. 3 (B) and Fig. 5).Cylinder 4 is the punch press parts that are used to support and push male and female mold 1,2 among the figure.
(3) adopt Metal Cutting Machine Tool (as milling machine) that the curved end face of metallic plate is carried out machining: after utilizing the anchor clamps fixed metal plate, outer surface to its bending forming carries out machining, cutting output is larger than the height δ (for example δ+0.05 millimeter) of small stair, make the curved end face of this metallic plate smooth, smooth, corner angle are clearly demarcated, the cylindrical arc angle is visually 0 degree (referring to schematic diagram (C), (D) before and after metallic plate among Fig. 3 10 cutting).
Need to prove that method of the present invention only is applicable to that thickness is not more than 3 millimeters sheet metal, for example mild steel, copper and copper alloy, aluminium and aluminium alloy or the lower non-ferrous metal of other hardness.If during metallic plate to be hardness higher middle and high carbon steel, then when carrying out preceding two bending machining process operations, need preheat (heating-up temperature is 300～500 degree Celsius) to metallic plate earlier, promptly adopt the forge hot bent distortion of bending.When if the angle of metallic plate bending has only 45～90 to spend, when step (1), earlier metallic plate is bent to half of angle on target, when step (2), again metallic plate is bent to angle on target, other technological parameter is constant.
Referring to Fig. 6, introduce experimental example of the present invention, diagram is the battery bonnet (material is an aluminium alloy 5052) of the palm PC produced of applicant, finds out that from vertical view there are four claws on its limit, left and right sides and base, is used for and the chimeric fixing of housing.Adopt the outer surface of this claw of processes manufacturing of the present invention not have fillet (referring to cutaway view), realized the requirement of product structure design fully.
Claims (8)
1, a kind of crooked manufacture method of metallic plate is characterized in that: after adopting twice cold extrusion, carry out the composite technology of metal cutting processing again, realize that the profile of punching press member does not have arc chord angle, promptly the crooked outer surface of this member is the right angle; Comprise following process:
(1) adopt punch press and cold-extrusion technology that metallic plate is carried out the bending machining first time: the metallic plate extruding to be bent into 45 ± 5 degree, and to squeeze out a small stair at its crooked position;
(2) adopt punch press and cold-extrusion technology that metallic plate is carried out bending machining for the second time: the metallic plate that will be bent into 45 ± 5 degree continues extrusion molding, is about to the metallic plate extruding and is bent into 90 ± 3 degree;
(3) adopt Metal Cutting Machine Tool that the curved end face of metallic plate is carried out machining: after utilizing anchor clamps fixing, the metallic plate outer surface of bending forming is carried out machining, make the curved end face of this metallic plate smooth, smooth, corner angle are clearly demarcated, the cylindrical arc angle be visually 0 the degree.
2, the crooked manufacture method of metallic plate according to claim 1, it is characterized in that: the height of the small stair that squeezes out at the metallic plate crooked position in the described step (1) is 0.15 to 0.20 times of this plate thickness, at this moment, the horizontal clearance of the small stair moulding section of concave, convex two moulds of mould is less than the thickness of this metallic plate.
3, the crooked manufacture method of metallic plate according to claim 1, it is characterized in that: the gap between two moulds of the concave, convex that pushes in the described step (2) is identical with the thickness of this metallic plate, so that the plastic deformation that this metallic plate carries out has sufficient room, avoid producing the cylindrical arc angle between two extrusion dies.
4, the crooked manufacture method of metallic plate according to claim 1 and 2 is characterized in that: 0.05 millimeter of the height that in the described step (3) cutting output of the machining of the curved end face of metallic plate is greater than described small stair.
5, the crooked manufacture method of metallic plate according to claim 1 is characterized in that: described metallic plate is mild steel, copper, copper alloy, aluminium, aluminium alloy or the lower non-ferrous metal of other hardness.
6, the crooked manufacture method of metallic plate according to claim 1, it is characterized in that: when described metallic plate is middle and high carbon steel, when this metallic plate being carried out twice cold extrusion bending machining of preceding two process, want earlier metallic plate to be preheated, heating-up temperature is 300～500 degree Celsius.
7, according to the crooked manufacture method of claim 1 or 5 or 6 described metallic plates, it is characterized in that: the thickness of described metallic plate is not more than 3 millimeters.
8, a kind of crooked manufacture method of metallic plate is characterized in that: after adopting twice cold extrusion, carry out the composite technology of metal cutting processing again, realize that the profile of punching press member does not have arc chord angle, promptly the angle on target of the crooked outer surface of this member is 45～90 degree; Comprise following process:
(1) adopt punch press and cold-extrusion technology that metallic plate is carried out bending machining for the first time: metallic plate to be pushed half that bends to angle on target, and squeeze out a small stair at its crooked position;
(2) adopt punch press and cold-extrusion technology that metallic plate is carried out bending machining for the second time: half the metallic plate that will be bent into angle on target continues extrusion molding, and the metallic plate extruding is bent into angle on target ± 3 degree;
(3) adopt Metal Cutting Machine Tool that the curved end face of metallic plate is carried out machining: after utilizing anchor clamps fixing, the metallic plate outer surface of bending forming is carried out machining, make the curved end face of this metallic plate smooth, smooth, corner angle are clearly demarcated, the cylindrical arc angle be visually 0 the degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100588673A CN100446913C (en) | 2005-03-30 | 2005-03-30 | Bent machining method for metal plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100588673A CN100446913C (en) | 2005-03-30 | 2005-03-30 | Bent machining method for metal plate |
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| Publication Number | Publication Date |
|---|---|
| CN1840285A CN1840285A (en) | 2006-10-04 |
| CN100446913C true CN100446913C (en) | 2008-12-31 |
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| CNB2005100588673A Expired - Fee Related CN100446913C (en) | 2005-03-30 | 2005-03-30 | Bent machining method for metal plate |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478119C (en) * | 2007-03-22 | 2009-04-15 | 南京赛彤铁路电气化有限公司 | Making process of stainless steel belt for composite aluminium-steel contact rail |
| CN103350131B (en) * | 2013-07-12 | 2015-10-28 | 四川电力建设三公司 | The method of veneer reeling machine pressed-steel ladder rung |
| CN104999275B (en) * | 2015-06-25 | 2017-12-08 | 江苏易实精密科技股份有限公司 | A kind of system of processing and its processing method for rolling bushing |
| CN109967976A (en) * | 2019-03-25 | 2019-07-05 | 联想(北京)有限公司 | Processing method and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2249506A (en) * | 1990-11-07 | 1992-05-13 | Charles Edward Harris | Method of bending L or channel sections |
| CN2287061Y (en) * | 1996-08-23 | 1998-08-05 | 朱德江 | Hand plate bender with chain comission |
| CN1259889A (en) * | 1997-06-20 | 2000-07-12 | 卢恰诺·加斯帕里尼 | Machine for press-bending metal sheet |
| CN1476944A (en) * | 2002-08-22 | 2004-02-25 | 王朝峰 | Method for bending angle of sheet metal |
| CN1597237A (en) * | 2004-08-06 | 2005-03-23 | 胡忠明 | Manufacturing technology of metal frame section bar |
-
2005
- 2005-03-30 CN CNB2005100588673A patent/CN100446913C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2249506A (en) * | 1990-11-07 | 1992-05-13 | Charles Edward Harris | Method of bending L or channel sections |
| CN2287061Y (en) * | 1996-08-23 | 1998-08-05 | 朱德江 | Hand plate bender with chain comission |
| CN1259889A (en) * | 1997-06-20 | 2000-07-12 | 卢恰诺·加斯帕里尼 | Machine for press-bending metal sheet |
| CN1476944A (en) * | 2002-08-22 | 2004-02-25 | 王朝峰 | Method for bending angle of sheet metal |
| CN1597237A (en) * | 2004-08-06 | 2005-03-23 | 胡忠明 | Manufacturing technology of metal frame section bar |
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| CN1840285A (en) | 2006-10-04 |
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Granted publication date: 20081231 Termination date: 20100330 |