CN101862785B - Burr-free punching process for metal sheet - Google Patents
Burr-free punching process for metal sheet Download PDFInfo
- Publication number
- CN101862785B CN101862785B CN201010215682XA CN201010215682A CN101862785B CN 101862785 B CN101862785 B CN 101862785B CN 201010215682X A CN201010215682X A CN 201010215682XA CN 201010215682 A CN201010215682 A CN 201010215682A CN 101862785 B CN101862785 B CN 101862785B
- Authority
- CN
- China
- Prior art keywords
- stamping
- metal blank
- punching
- end points
- burr
- 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.)
- Active
Links
Images
Landscapes
- Punching Or Piercing (AREA)
Abstract
The invention relates to a burr-free punching process for a metal sheet, consisting of the following two steps: cold extrusion is carried out on the back side of the metal sheet, an auxiliary groove is formed on a punching slot position, and a concave indentation is generated, wherein the concave indentation has a beveled edge, one end of the beveled edge arranged at the concave indentation opening is a first end point, and the included angle alpha of the beveled edge relative to the back side of the metal sheet is 50-65 degrees; using a punching die for punching, wherein the punching gas L3 is 0.04-0.06 times of the thickness of the sheet, the first end point is arranged at the top face of a punching lowerdie edge, and the distance L2 between the first end point and the punching lowerdie edge is 0.2 times of the thickness T of the panel veneer; and a second end point is arranged in an area in which the punching top die edge bottom surface is vertically projected, the distance L1 between the second end point and the vertical projection of the punching top die edge is 0.01-0.15 times of the thickness T of the sheet. The invention has fewer working procedures, simple process and low cost, has small influence on high-precision holes or product appearance, and has low requirements on die edge sharpness.
Description
Technical field
The present invention relates to metal blank stamping-out manufacture field, be specifically related to a kind of no burr punching process of metal blank.
Background technology
As everyone knows, the metal blank stamping-out is prone to produce burr at the notching edge of plate.Fig. 1 (a)～Fig. 1 (d) has provided the schematic diagram of metal blank 11 stamping-out processes; Wherein, Fig. 1 (a) expression beginning stamping-out state, Fig. 1 (b) expression plate 11 cracks 12 states; The plate state is broken in Fig. 1 (c) expression, Fig. 1 (d) expression waste material 13 and product 14 released states.Can find out that from above process metal blank 11 receives the notching edge that acts on waste material 13 and product 14 of tension can produce burr 15, influences the quality of product in stamping-out.See from existing theory; Influence burr 15 and produce following two factors that mainly contain: first factor is the position that crackle 12 produces; As shown in Figure 2; Always there are the blade clearance in patrix 16 and counterdie 17, when crackle 12 is created in the line between patrix 16 tips and counterdie 17 tips, burr 15 can not occur, otherwise all burr 15 can occur; Second factor is the sharpness of blanking die cutting edge 18, and be as shown in Figure 3, when cutting edge 18 wearing and tearing cause sharpness not good enough, is easy to generate burr 15.And in the actual production, people be difficult to guarantee above-mentioned both all reach perfect condition, so to produce burr 15 at notching edge behind metal blank 11 stamping-outs are the common phenomena that occur in the technology.
In order to solve the Burr Problem that occurs in the metal blank stamping-out, mainly adopt following several method at present in the industry:
1. dabbing stings behind the stamping-out
Fig. 4 (a) representes punching, the dabbing thorn 15 after Fig. 4 (b) expression punching.This method is carried out in two steps, and the first step is punching, and this moment, the aperture lower edge produced burr 15; Second step was to utilize mould 19 extruding burrs 15.The problem that the method exists is: in extruding burr 15 processes, hole 20 can deform with plate 11, can have a negative impact to the precision of hole 20 and plate 11 profiles.
2. adopt smart towards technological stamping-out
Fig. 5 is the smart schematic diagram in hole in a state of excitement.As can be seen from the figure, this method is to utilize holding pad 21 that sheet metal 11 is compressed in the periphery, Crop Area, adopts the pure shear stamping-out to reach the effect of no burr 15 then.The problem that the method exists is: (1) needs special-purpose essence towards equipment; (2) mould structure is complicated, and required precision is high, and cost is high; Lubricating condition during (3) to stamping-out workpiece material and punching out has higher requirements; (4) punched scrap and stamping-out workpiece can only adopt the top discharge mode.
3. reciprocal stamping-out
Fig. 6 (a)～Fig. 6 (c) is the schematic diagram of reciprocal stamping-out process.As can be seen from the figure, the stamping-out process of this method is: the first step, do semi-piercing earlier, and promptly stamping-out is seen Fig. 6 (a) to half the position; Second step, oppositely squeeze back, be about to sweep away half the waste material 13 and squeeze back in the plate 11, see Fig. 6 (b); In the 3rd step, punching once more breaks away from waste material 13 and product 14 fully.The problem that the method exists is: mould structure is complicated, and high to the required precision of upper and lower mould, cost is high.
In sum, how solving the problem that exists in the existing no burr punching process, is the problem that the present invention studies.
Summary of the invention
The present invention provides a kind of burr-free punching process for metal sheet, its objective is the deficiency that will overcome above-mentioned prior art, solves the Burr Problem that occurs in the metal blank stamping-out.
For achieving the above object, the technical scheme that the present invention adopts is: a kind of burr-free punching process for metal sheet, form by following two processing steps:
The first step, the auxiliary line ball of processing
Utilize extrusion die that cold extrusion is carried out at the metal blank back side; On the stamping-out incision site, form auxiliary line ball, this auxiliary line ball stays the spill impression at the metal blank back side along the stamping-out otch, under metal blank is in level; Cross section one side of spill impression has hypotenuse; The end that hypotenuse is positioned at spill impression opening is first end points, and it is second end points that hypotenuse is positioned at the inner end of spill impression, and the angle at the relative metal blank of the hypotenuse back side is 50 degree～65 degree;
Second step, stamping-out
Use blanking die that the stamping-out incision site of processing auxiliary line ball on the metal blank is carried out stamping-out; In blanking die; Blade clearance L3 between stamping-out patrix and the stamping-out counterdie is 0.04～0.06 times of metal blank thickness T; The stamping-out counterdie acts on the metal blank back side, and said first end points is positioned at stamping-out counterdie cutting edge end face, and the distance L 2 of first end points and stamping-out counterdie cutting edge is 0.2 times of metal blank thickness T; The stamping-out patrix acts on the metal blank front, and said second end points is positioned at the zone of stamping-out patrix cutting edge bottom surface upright projection, and the distance L 1 of second end points and stamping-out patrix cutting edge upright projection is 0.1～0.15 times of metal blank thickness T.
Operation principle of the present invention is: the auxiliary line ball of processing earlier, carry out stamping-out again.Promptly before stamping-out; Earlier on the stamping-out incision site of plate, utilize extrusion die to do cold extrusion and form auxiliary line ball; Should stay the spill impression at the plate back side along the stamping-out otch by auxiliary line ball, and re-use blanking die the stamping-out incision site of processing auxiliary line ball on the metal blank is carried out stamping-out.
Because the technique scheme utilization, the present invention compared with prior art has advantage and effect:
1. the present invention is applied under the situation that can realize not increasing mould or other deburring operation in the progressive die and makes the incision of product edge not have burr;
2. technology of the present invention is simple, and cost is low;
3. the present invention is less to the influence of high-precision hole or product design;
The present invention to the die point sharpness require low.
Description of drawings
Accompanying drawing 1 (a)～Fig. 1 (d) is the schematic diagram of existing metal blank stamping-out process;
Accompanying drawing 2 is the sketch map that crackle is created in ideal position when having the metal blank stamping-out now;
Accompanying drawing 3 is the die point sketch map of sharp state not during for existing metal blank stamping-out;
Accompanying drawing 4 (a)～Fig. 4 (b) is the principle schematic of first kind of existing no burr blanking method;
Accompanying drawing 5 is the principle schematic of second kind of existing no burr blanking method;
Accompanying drawing 6 (a)～Fig. 6 (c) is the principle schematic of the third existing no burr blanking method;
Accompanying drawing 7 is the principle schematic of punching process of the present invention;
Accompanying drawing 8 (a)～Fig. 8 (d) is the schematic diagram of punching process process of the present invention.
In the above accompanying drawing: 1. metal blank; 2. stamping-out patrix; 3. stamping-out counterdie; 4. spill impression; 5. hypotenuse; 6. first end points; 7. second end points; 8. crackle; 11. metal blank; 12. crackle; 13. waste material; 14. product; 15. burr; 16. patrix; 17. counterdie; 18. cutting edge; 19. mould; 20. hole; 21. holding pad; α. the angle at the relative metal blank of the hypotenuse back side; T. metal blank thickness; L1. the distance of second end points and stamping-out patrix cutting edge upright projection; L2. the distance of first end points and stamping-out counterdie cutting edge; L3. blade clearance.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment: a kind of burr-free punching process for metal sheet, shown in Fig. 7～8, form by following two processing steps:
The first step, the auxiliary line ball of processing
Utilize extrusion die that cold extrusion is carried out at metal blank 1 back side; On the stamping-out incision site, form auxiliary line ball, this auxiliary line ball stays spill impression 4 at metal blank 1 back side along the stamping-out otch, and is as shown in Figure 7; Be under the level at metal blank 1; Cross section one side of said spill impression 4 has hypotenuse 5, and the end that hypotenuse 5 is positioned at spill impression 4 openings is first end points 6, and it is second end points 7 that hypotenuse 5 is positioned at spill impression 4 inner ends; The angle at hypotenuse 5 relative metal blanks 1 back side is 50 degree～65 degree, is good with 55 degree～60 degree wherein;
Second step, stamping-out
Shown in Fig. 8 (a)～Fig. 8 (d); Use blanking die that the stamping-out incision site of processing auxiliary line ball on the metal blank 1 is carried out stamping-out; In blanking die, the blade clearance L3 between stamping-out patrix 2 and the stamping-out counterdie 3 is 0.04～0.06 times of metal blank 1 thickness T, and stamping-out counterdie 3 acts on metal blank 1 back side; Said first end points 6 is positioned at stamping-out counterdie 3 cutting edge end faces, and the distance L 2 of first end points 6 and stamping-out counterdie 3 cutting edges is 0.2 times of metal blank 1 thickness T; Stamping-out patrix 2 acts on metal blank 1 front, and said second end points 7 is positioned at the zone of stamping-out patrix 2 cutting edge bottom surface upright projections, and the distance L 1 of second end points 7 and stamping-out patrix 2 cutting edge upright projections is 0.1～0.15 times of metal blank 1 thickness T.The relation of said parameters and metal blank thickness T is seen table 1.
Table 1
The stamping-out procedure declaration is following: Fig. 8 (a) expression beginning stamping-out state, and Fig. 8 (b) expression plate 1 cracks state, can see that crackle 8 produces along hypotenuse 5 this moment, and plate 1 state is broken in Fig. 8 (c) expression, Fig. 8 (d) expression waste material and product released state.Can find out that from above process because the effect of auxiliary line ball, metal blank 1 receives the effect of tension can't be at the notching edge generation burr of waste material and product in stamping-out, but both cut off directly and come off.
Operation principle of the present invention is: the auxiliary line ball of processing earlier, carry out stamping-out again.Promptly before stamping-out; Earlier on the stamping-out incision site of plate 1, utilize extrusion die to do cold extrusion and form auxiliary line ball; Should stay spill impression 4 at plate 1 back side along the stamping-out otch by auxiliary line ball, and re-use the stamping-out incision site of processing auxiliary line ball on 2,3 pairs of metal blanks 1 of blanking die and carry out stamping-out.
Advantage and effect that the present invention compared with prior art has have:
The present invention is applied under the situation that can realize not increasing mould or other deburring operation in the progressive die and makes the incision of product edge not have burr; Technology is simple, and cost is low; Influence to high-precision hole or product design is less; To the die point sharpness require low.
Sheet metal of the present invention does not have the burr punching process and not only can be used for punching, also can be used for stamping-out profile (connecting material level, cutting sheet material like stamping-out) etc.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (1)
1. burr-free punching process for metal sheet is characterized in that: be made up of following two processing steps:
The first step, the auxiliary line ball of processing
Utilize extrusion die that cold extrusion is carried out at metal blank (1) back side; On the stamping-out incision site, form auxiliary line ball; Should stay spill impression (4) at metal blank (1) back side along the stamping-out otch by auxiliary line ball; Be under the level at metal blank (1), cross section one side of spill impression (4) has hypotenuse (5), and the end that hypotenuse (5) is positioned at spill impression (4) opening is first end points (6); It is second end points (7) that hypotenuse (5) is positioned at the inner end of spill impression (4), and hypotenuse (5) angle (α) at metal blank (1) back side relatively is 55 degree～65 degree;
Second step, stamping-out
Use blanking die that the stamping-out incision site of processing auxiliary line ball on the metal blank (1) is carried out stamping-out; In blanking die; Blade clearance (L3) between stamping-out patrix (2) and the stamping-out counterdie (3) is 0.05 times of metal blank (1) thickness (T); Stamping-out counterdie (3) acts on metal blank (1) back side, and said first end points (6) is positioned at stamping-out counterdie (3) cutting edge end face, and the distance (L2) of first end points (6) and stamping-out counterdie (3) cutting edge is 0.2 times of metal blank (1) thickness (T); Stamping-out patrix (2) acts on metal blank (1) front; Said second end points (7) is positioned at the zone of stamping-out patrix (2) cutting edge bottom surface upright projection, and the distance (L1) of second end points (7) and stamping-out patrix (2) cutting edge upright projection is 0.1～0.15 times of metal blank (1) thickness (T).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010215682XA CN101862785B (en) | 2010-07-02 | 2010-07-02 | Burr-free punching process for metal sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010215682XA CN101862785B (en) | 2010-07-02 | 2010-07-02 | Burr-free punching process for metal sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101862785A CN101862785A (en) | 2010-10-20 |
| CN101862785B true CN101862785B (en) | 2012-01-25 |
Family
ID=42954819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010215682XA Active CN101862785B (en) | 2010-07-02 | 2010-07-02 | Burr-free punching process for metal sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101862785B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172712B (en) * | 2010-12-30 | 2013-04-10 | 东莞精锐电器五金有限公司 | Methods for forming blade double-faced cutting edge and metal plate double-faced straight edge |
| CN102554012A (en) * | 2011-12-31 | 2012-07-11 | 苏州三维精密机械有限公司 | Die blanking process utilizing matching of large clearance and small clearance |
| CN103212620B (en) * | 2012-05-18 | 2015-12-16 | 孙昌清 | Impulse-free robustness blanking method and stamping-out system |
| CN104226807A (en) * | 2014-07-11 | 2014-12-24 | 重庆理工大学 | Scraping and extruding combined fine blanking method and die |
| KR101963065B1 (en) * | 2015-02-04 | 2019-03-27 | 신닛테츠스미킨 카부시키카이샤 | Cutting device and cutting method |
| JP6503199B2 (en) * | 2015-03-06 | 2019-04-17 | Ｊｘ金属株式会社 | Punching method and manufacturing method of press-formed product |
| JP6448482B2 (en) * | 2015-06-25 | 2019-01-09 | 日伸工業株式会社 | Manufacturing method of pressed products |
| DE102016125510B3 (en) | 2016-12-22 | 2018-04-12 | Benteler Automobiltechnik Gmbh | Thermoformed metal sheet metal component and method for producing an opening in such a sheet metal component |
| JP6810265B2 (en) | 2017-06-28 | 2021-01-06 | 貴嗣 飯塚 | Cutting method of metal plate, manufacturing method of metal molded body and metal molded body |
| CN107234164B (en) * | 2017-08-14 | 2018-09-28 | 青岛润众汽车配件有限公司 | A kind of blanking method improving stamping parts cross section quality |
| CN113523091B (en) * | 2021-06-23 | 2022-07-19 | 东风柳州汽车有限公司 | 7-shaped hole machining method |
| CN114523031B (en) * | 2022-01-11 | 2023-12-15 | 上海理光数码设备有限公司 | Processing technology for cutting part without burr and product thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56134026A (en) * | 1980-03-25 | 1981-10-20 | Tsubakimoto Chain Co | Blanking method |
| DE19724657C2 (en) * | 1997-06-11 | 1998-10-15 | Leico Werkzeugmaschb Gmbh & Co | Method and device for producing a rotationally symmetrical body |
| JP3413140B2 (en) * | 1999-09-17 | 2003-06-03 | 日清紡績株式会社 | Overtaking method by press machine |
| CN1962109A (en) * | 2006-11-23 | 2007-05-16 | 李清义 | Method and device for punching hole with micro pore diameter and minimum burr |
-
2010
- 2010-07-02 CN CN201010215682XA patent/CN101862785B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101862785A (en) | 2010-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101862785B (en) | Burr-free punching process for metal sheet | |
| CN205463928U (en) | Prevent mould of high hole flanging fracture | |
| CN205253895U (en) | Little scrap (bridge) blanking shaping essence towards continuous mould of bending | |
| CN103521598B (en) | Deburring waste knife and Trimming Die | |
| CN105537454A (en) | Metal plate forming process of aircraft stepped thin-walled part | |
| CN103522009A (en) | Check ring and processing method thereof | |
| CN202438612U (en) | Flanging and once molding punch without scrap generation | |
| CN106825194A (en) | Crowded formula is cut without gear ring fine device and method | |
| KR20110093706A (en) | Method and device for influencing the sheared and functional edge at fine blanked finished parts | |
| CN107486494A (en) | Repair and turn over cutter block, repair overmolded tool and die assembly | |
| CN102527815A (en) | Fine trimming continuous stamping process | |
| CN103722589B (en) | Louvering die | |
| CN205289421U (en) | Take cut -out press of gas tank | |
| CN105834294A (en) | Progressive die punching process cutter joint burr processing device and process | |
| WO2010100019A3 (en) | Method and device for producing a profile on a sheet metal part, and sheet metal part that can be produced according to the method | |
| CN205971283U (en) | Car leg and air film guide rail of air film guide rail | |
| CN205613900U (en) | Bright and clean fine blanking mould of little scrap (bridge) heavy gauge of optimal design | |
| CN100518982C (en) | Ultra-thin accurate tooth form punch forming method | |
| CN204602985U (en) | For the die cutting die of sheet material | |
| CN204523975U (en) | A kind of drift of super thick mild steel punch die | |
| CN104741681B (en) | A kind of big anterior angle mistake shear mould | |
| CN207914393U (en) | A kind of fine blanking die of punch-die and cavity plate | |
| CN204448974U (en) | A kind of pipe end die cutting die | |
| CN205966954U (en) | Bright and clean blanking mould of precision parts | |
| CN216297721U (en) | Staggered cutting insert for stamping die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |