CN102310136B - Novel process for blanking of arc-shaped part of component - Google Patents

Novel process for blanking of arc-shaped part of component Download PDF

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Publication number
CN102310136B
CN102310136B CN 201110298780 CN201110298780A CN102310136B CN 102310136 B CN102310136 B CN 102310136B CN 201110298780 CN201110298780 CN 201110298780 CN 201110298780 A CN201110298780 A CN 201110298780A CN 102310136 B CN102310136 B CN 102310136B
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China
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sheet
extruding
extruded
circular arc
stamping
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CN 201110298780
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CN102310136A (en
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童志刚
胥波
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FINEFORMING PRECISION ENGINEERING Co Ltd
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FINEFORMING PRECISION ENGINEERING Co Ltd
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Abstract

The invention discloses a novel process for blanking of an arc-shaped part of a component, which is characterized by comprising the following steps: (1) first negative gap extrusion: the part of 0.02mm outside the final dimensional line of the product after cutting of a sheet is adopted as an extrusion line, and the bottom of an extrusion punch is extruded to the original thickness of the sheet; (2) second negative gap extrusion: the bottom of an extrusion punch is extruded to the original thickness of the sheet; (3) the part of 0.02mm inside the extrusion line is adopted as a cutting line, the residual thickness part of the sheet is cut downwards along the cutting line by the end of one side of a cutting punch, which is contacted with the sheet, and the extruded part of the sheet is cut. The problems of the prior art that corner collapse, high burrs and secondary cracking can be easily caused during cutting of small arc-shaped parts of the component can be solved. By adopting the novel process for blanking of the arc-shaped part of the component, the sectional quality and dimensional accuracy can be better guaranteed; and the service life of the blade can be prolonged, and the mold maintenance cost can be reduced.

Description

Parts circular arc position stamping-out new technology
Technical field
The present invention relates to a kind of parts circular arc position stamping-out new technology, particularly relate to the negative clearance extruding is carried out in a kind of employing to sheet material parts circular arc position stamping-out new technology.
Background technology
As shown in Figure 1-Figure 3, existing punching press industry technology that employing is sheared at parts roundlet arc position is: cut the--------refine for the third time of refine----for the second time of refine for the first time in advance.Adopt this kind shearing technology, problems such as high burr and secondary breakdown the angle of collapsing appears, in parts roundlet arc position easily.And gear shape is sheared the amplification version difficult problem that exactly little circular arc (in, outer) is sheared, outstanding more when thick more its performance of sheet metal thickness.Shown in Fig. 4-5, though product shear by this technology, gear place collapse angle and secondary breakdown, burr is inevitable.So in order to reach client's outward appearance and dimensional requirement, needing constantly the edge of a knife to be carried out maintenance could produce reluctantly, the very easy damage of the edge of a knife raises the cost greatly and bad hidden danger exists constantly.If adopt the smart impact machine bed of professional equipment also can reach above-mentioned effect in addition, but cost is too high, causes bigger burden to enterprise.
Summary of the invention
In order solving in the prior art parts roundlet arc position to be sheared, to occur the angle of collapsing easily, problems such as high burr and secondary breakdown the invention provides a kind of cross section quality that can better guarantee, dimensional accuracy; And can enough prolong the edge of a knife life-span, reduce the parts circular arc position stamping-out new technology of mould cost of upkeep.
In order to address the above problem, the technical solution used in the present invention is:
A kind of parts circular arc position stamping-out new technology is characterized in that: comprise following following steps:
(1), negative clearance extruding for the first time: being sheared the outer 0.02mm partially of back product final size line with sheet material is extruded threads, the extruding drift contacts a side with sheet material end is extruded part sheet material along extruded threads extruding downwards, 40% to 60% of extruding ram bottom extruding original plate thickness;
(2), negative clearance extruding for the second time: the extruding drift contacts a side with sheet material end continues downwards along the extruded threads of the negative clearance extruding first time that extruding is extruded part sheet material, and the extruding ram bottom is pushed 60% to 80% of original plate thickness;
(3), be shear line with inclined to one side 0.02mm place in the extruded threads, cutting punch contacts a side with sheet material end is along the shear line thickness of extrusion plate that descends, then cutting punch contact a side with sheet material the end again along shear line to down cut residual sheet metal thickness, will be extruded part sheet material and reduce.
Aforesaid a kind of parts circular arc position stamping-out new technology is characterized in that: in step (1), the extruding ram bottom is squeezed to the position of original plate thickness 50%.
Aforesaid a kind of parts circular arc position stamping-out new technology is characterized in that: in step (2), the extruding ram bottom is squeezed to the position of original plate thickness 20%.
Aforesaid a kind of parts circular arc position stamping-out new technology, it is characterized in that: in step (3), cutting punch contacts the end of a side along 80% of shear line decline sheet metal thickness with sheet material, then cutting punch contact a side with sheet material the end again along shear line to down cut 20% sheet metal thickness, will be extruded part sheet material and reduce.
Aforesaid a kind of parts circular arc position stamping-out new technology is characterized in that: in step (1), before extruding, be extruded on the compressive plane of part sheet material and add punching oil.
Aforesaid a kind of parts circular arc position stamping-out new technology is characterized in that: in step (2), before extruding, be extruded on the compressive plane of part sheet material and add punching oil again.
Aforesaid a kind of parts circular arc position stamping-out new technology, it is characterized in that: described cutting punch contacts a side with sheet material end is provided with the fillet that radius is 0.1mm.
The invention has the beneficial effects as follows: it is lower that the present invention can cause shearing collapse angle and size distortion to reduce to, and can better guarantee cross section quality, burr height and dimensional accuracy; Can prolong the edge of a knife life-span in addition, reduce the mould cost of upkeep.
Description of drawings
Fig. 1 is the structural representation of existing parts circular arc position punching process refine for the first time step.
Fig. 2 is the structural representation of existing parts circular arc position punching process refine for the second time step.
Fig. 3 is the structural representation of existing parts circular arc position punching process refine step for the third time.
Fig. 4 is that prior art middle gear parts are sheared the back schematic diagram.
Fig. 5 is the structure for amplifying schematic diagram of A part among Fig. 1.
Fig. 6 is the parts circular arc of the present invention position punching process structural representation of negative clearance pressing steps for the first time.
Fig. 7 is the parts circular arc of the present invention position punching process structural representation of negative clearance pressing steps for the second time.
Fig. 8 is the structural representation that parts circular arc of the present invention position punching process is sheared step.
Fig. 9 is cutting punch of the present invention and sheet material contacting structure schematic diagram.
The structure for amplifying schematic diagram of B part among Figure 10 Fig. 9.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
Shown in Fig. 6-9, introduce the mould structure of lower member circular arc position punching process below in detail: be disposed with from top to bottom: upper bolster 1, upper padding plate 3, drift fixed head 4, discharging backing plate 5, stripper 6, die piece 7, lower bolster 8, die shoe 9, bottom seat pad 10, bottom plate 11.Be provided with spring at discharging push rod 2 tops, described spring is connected with upper bolster 1 madial wall, and described discharging push rod 2 bottoms are passed upper bolster 1, upper padding plate 3, drift fixed head 4, discharging backing plate 5 successively and entered in the stripper 6.
In die version 7, be provided with die plate insert 14, on die plate insert 14, be placed with the sheet material 13 of required processing.Bottom at upper padding plate 3 is fixed with drift 12 by drift fixed head 4, the upper surface that discharging backing plate 5, stripper 6 are come die plate insert 14 is passed in drift 12 bottoms, during design, the drift 12 that is adopted when preceding twice negative clearance pushes is the extruding drift, and the drift 12 that is adopted when shearing in the 3rd step is a cutting punch.
Adding man-hour, extruding upper bolster 1, upper bolster 1 drives drifts 12 extruding downwards or shears sheet materials 13 by upper padding plate 3, and upper bolster 1 is also at its inner spring of extruding simultaneously, and spring will drive discharging push rod 2 and pushes downwards like this.When extruding or shear finish after, spring self-return, discharging push rod 2 also are returned to initial position thereupon.
As Fig. 6-shown in Figure 10, a kind of parts circular arc position stamping-out new technology is characterized in that: comprise following following steps:
(1), negative clearance extruding for the first time: before extruding, be extruded on the compressive plane of part sheet material and add punching oil.Being sheared the outer 0.02mm partially of back product final size line with sheet material then is extruded threads, and the extruding drift contacts a side with sheet material end is extruded part sheet material along extruded threads extruding downwards, and the extruding ram bottom is squeezed to 50% position of sheet metal thickness.
(2), negative clearance extruding for the second time: before extruding, be extruded on the compressive plane of part sheet material and add punching oil again.Push drift contacts a side with sheet material end then and continue downwards along the extruded threads of the negative clearance extruding first time that extruding is extruded part sheet material, the extruding ram bottom is squeezed to the position of sheet metal thickness 20%.
(3), be shear line with inclined to one side 0.02mm place in the extruded threads, cutting punch contacts the end of a side along 80% of shear line decline sheet metal thickness with sheet material, then cutting punch contact a side with sheet material the end again along shear line to down cut 20% sheet metal thickness, will be extruded part sheet material and reduce.For sheet material obtains higher end face, cutting punch contacts a side with sheet material end is provided with the fillet that radius is 0.1mm.
When twice negative clearance extruding, all, can play the quality that lubrication has further improved section like this to adding punching oil on the compressive plane that is extruded part sheet material.
By above-mentioned first negative clearance extruding, the processing technology of carrying out cutting again, it is lower shearing can be caused collapse angle and size distortion to reduce to, and can better guarantee cross section quality, burr height and dimensional accuracy; Can prolong the edge of a knife life-span in addition, reduce the mould cost of upkeep.
More than show and described basic principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (5)

1. parts circular arc position stamping-out new technology is characterized in that: may further comprise the steps:
(1), negative clearance extruding for the first time: being sheared the outer 0.02mm partially of back product final size line with sheet material is extruded threads, the extruding drift contacts a side with sheet material end is extruded part sheet material along extruded threads extruding downwards, and the extruding ram bottom is squeezed to 50% position of original plate thickness;
(2), negative clearance extruding for the second time: the extruding drift contacts a side with sheet material end continues downwards along the extruded threads of the negative clearance extruding first time that extruding is extruded part sheet material, pushes 20% position that ram bottom is squeezed to original plate thickness;
(3), be shear line with inclined to one side 0.02mm place in the extruded threads, the sheet metal thickness that cutting punch contacts a side with sheet material end descends and pushed along shear line, then cutting punch contact a side with sheet material the end again along shear line to down cut residual sheet metal thickness, will be extruded part sheet material and reduce.
2, a kind of parts circular arc according to claim 1 position stamping-out new technology, it is characterized in that: in step (3), cutting punch contacts the end of a side along 80% of shear line decline sheet metal thickness with sheet material, then cutting punch contact a side with sheet material the end again along shear line to down cut 20% sheet metal thickness, will be extruded part sheet material and reduce.
3, a kind of parts circular arc according to claim 2 position stamping-out new technology is characterized in that: in step (1), before extruding, be extruded on the compressive plane of part sheet material and add punching oil.
4, a kind of parts circular arc according to claim 3 position stamping-out new technology is characterized in that: in step (2), before extruding, be extruded on the compressive plane of part sheet material and add punching oil again.
5, a kind of parts circular arc according to claim 4 position stamping-out new technology, it is characterized in that: described cutting punch contacts a side with sheet material end is provided with the fillet that radius is 0.1mm.
CN 201110298780 2011-09-28 2011-09-28 Novel process for blanking of arc-shaped part of component Active CN102310136B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN 201110298780 CN102310136B (en) 2011-09-28 2011-09-28 Novel process for blanking of arc-shaped part of component

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CN102310136A CN102310136A (en) 2012-01-11
CN102310136B true CN102310136B (en) 2013-07-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081116A1 (en) * 2001-04-06 2002-10-17 Adval Tech Holding Ag Method for burrless cutting of sheets
CN101107086A (en) * 2005-01-25 2008-01-16 爱信艾达株式会社 Pressing mechine, pressing method, and punched article
CN101879555A (en) * 2010-06-23 2010-11-10 山东潍坊福田模具有限责任公司 Die processing method for solving unevenness of vehicle door outer plate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3653793B2 (en) * 1995-05-31 2005-06-02 日産自動車株式会社 Press working mold and press working method
FR2751571B1 (en) * 1996-07-25 1999-10-22 Lorraine Laminage Method of cutting a workpiece into a sheet of sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081116A1 (en) * 2001-04-06 2002-10-17 Adval Tech Holding Ag Method for burrless cutting of sheets
CN101107086A (en) * 2005-01-25 2008-01-16 爱信艾达株式会社 Pressing mechine, pressing method, and punched article
CN101879555A (en) * 2010-06-23 2010-11-10 山东潍坊福田模具有限责任公司 Die processing method for solving unevenness of vehicle door outer plate

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