CN101633114B - Processing method for trimming edge of blanking die - Google Patents
Processing method for trimming edge of blanking die Download PDFInfo
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- CN101633114B CN101633114B CN2009100178075A CN200910017807A CN101633114B CN 101633114 B CN101633114 B CN 101633114B CN 2009100178075 A CN2009100178075 A CN 2009100178075A CN 200910017807 A CN200910017807 A CN 200910017807A CN 101633114 B CN101633114 B CN 101633114B
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Abstract
The invention discloses a processing method for trimming an edge of a blanking die. The processing method is carried out after finish machining on the molded surface of the die is completed, and comprises the following steps: semi finish machining on the edge, edge quenching and super-hard machining on the edge. Long-term discovery research and tracking survey show that trimming clearances are completely controlled by numerical control machining in the method, which compensates for the defect of artificially machining on the edge, reduces interference of human factors and improves the machining efficiency and the machining quality for trimming the edge. Laser scanning detection and subsequent feedback show that by adopting the processing method, the machining quality for trimming the edge is greatly improved, surface roughness and perpendicularity of an edge band are obviously improved and manufacturing precision of the edge is guaranteed to the utmost, thus the method shows development direction and tendency of the processing method for trimming the edge, and is also an effective way to improve the quality of stamping parts and reduce the production cycle of the die.
Description
Technical field
The present invention relates to the processing method of full-sized car covering trimming edge of blanking die.
Background technology
Full-sized car covering blanking die be required precision than higher mould, the clearance control of trimming edge is the manufacturing emphasis of this class mould.Expect desirable stamping parts, need guarantee to realize rational blade clearance, the size of blade clearance and uniformity coefficient not only directly influence die life, blanking pressure size and stamping parts size, also determine the cross section quality of stamping parts.How selecting correct cutting edge processing method to realize rational blade clearance, is the difficult point of making blanking die.
Mostly the trimming line of full-sized car covering blanking die is complicated three-dimensional curve, and the deburring piece is also bigger, and majority can not adopt methods such as line cutting, can only process with Digit Control Machine Tool, detects also relatively difficulty, and traditional cutting edge processing method mainly contains following two kinds:
1. blanking die is after finishing profile processing, and protruding, cutting edge of die is zero to be machined directly into theoretical size by the blade clearance, carries out Quenching Treatment then.Finish assembling by pincers worker again, on forcing press, detect the cutting edge gap.Be benchmark with the punch during detection, guarantee the blade clearance by the method for pincers worker adjustment, advanced study and training cavity splits.
2. blanking die is after finishing profile processing, and the punch cutting edge is machined to theoretical size, carries out Quenching Treatment; Cutting edge of die allowance 0.2-0.3MM does not carry out Quenching Treatment, finishes assembling by pincers worker then, with the punch cutting edge cutting edge of die impression is revised on forcing press, impression back die inwall has material to be cut out, and quenches then, press vestige refine cutting edge of die by pincers worker, till the blade clearance is suitable.
The shortcoming of above-mentioned two kinds of methods is: the back piece distortion of quenching is big, and the trimming line gap is inhomogeneous, is difficult to guarantee to reach that designing requirement, pincers worker repair that to throw workload big, and cutting edge quality is poor.Second kind of situation particularly forms because the cutting edge of die gap is almost all repaiied to throw by pincers worker, so cutting edge fineness, perpendicularity all are difficult to guarantee.Sometimes pincers worker is in order to drive plan or horizontal problem, and the land that repairs is narrow partially, and cutting edge strength is low, and after the punching press several batches, the phenomenons such as sword or crackle and gap are big that jump can appear in cutting edge, needs repair welding again, repaiies throwing.As seen with the cutting edge gap precision of traditional ways and means processing and the needs of the modern mould production of difficult quality guarantee.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly controls the deburring gap by digital control processing fully, reduces interference from human factor, thereby improves the processing method of the trimming edge of blanking die of the working (machining) efficiency of trimming edge and quality.
For solving the problems of the technologies described above, technical scheme of the present invention is: the processing method of trimming edge of blanking die, and after finishing, die face fine finishining carries out, may further comprise the steps:
Cutting edge semifinishing step: cutting edge is carried out semifinishing, and patrix cutting edge margin width is not more than 25mm, and the outer cutting edge margin width of counterdie is not more than 20mm, and counterdie inner cutter hole margin width is not more than 15mm; Reservation allowance after the cutting edge semifinishing is 0.2-0.3mm;
Cutting edge quenching step: cutting edge is quenched, and the hardness after cutting edge quenches is HRC 55-HRC 65;
The superhard procedure of processing of cutting edge: the workpiece after will quenching uses Digit Control Machine Tool to carry out the cutting edge Milling Process, and the cutter of Digit Control Machine Tool uses superhard milling cutter.
As optimized technical scheme, the reservation allowance after the described cutting edge semifinishing requires evenly.
As optimized technical scheme, the hardness after described cutting edge quenches requires consistent.
As optimized technical scheme, in the superhard procedure of processing of described cutting edge, adopt the compressed air cooling and blow away iron filings.
As optimized technical scheme, in the superhard procedure of processing of described cutting edge, Milling Process adopts the climb cutting processing method.
Owing to adopted technique scheme, the present invention is directed to the problem and shortage that cutting edge processing conventional method exists, processing improves to cutting edge on processing method, and promptly cutting edge carries out superhard processing after quenching again.Through long-term exploratory development and follow-up investigation, adopted rational technological process, and standard lathe, cutter and main cutting parameter, full sequencing processing, control the deburring gap by digital control processing fully, remedy the deficiency of artificial cutting edge, reduced the interference of human factor, thereby improved the working (machining) efficiency and the crudy of trimming edge.Through laser scanning detection and postorder feedback, the crudy of trimming edge is greatly improved, and surface roughness and land perpendicularity all have clear improvement; Wherein, straight line edge gap qualification rate is 97%, and curve and cutting edge gap, R angle qualification rate are that 83%, matched moulds success rate reaches 75%, and pincers worker advanced study and training workload only is former about 20%.Application of the present invention has guaranteed the accuracy of manufacture of cutting edge to greatest extent, is the developing direction and the trend of trimming edge processing, also is to improve the stamping parts quality, reduce one of effective way of mould production cycle.
The specific embodiment
The processing method of trimming edge of blanking die is carried out after die face fine finishining is finished, and may further comprise the steps:
Cutting edge semifinishing step: cutting edge is carried out semifinishing, and patrix cutting edge margin width is not more than 25mm, and the outer cutting edge margin width of counterdie is not more than 20mm, and counterdie inner cutter hole margin width is not more than 15mm; Reservation allowance after the cutting edge semifinishing is 0.2-0.3mm; Allowance is crossed conference influences machining accuracy and aggravation tool wear, and allowance is too small then may to lack material when quenching distortion is big.
Cutting edge quenching step: cutting edge is quenched, and the hardness after cutting edge quenches is HRC 55-HRC 65;
The superhard procedure of processing of cutting edge: the workpiece after will quenching uses Digit Control Machine Tool to carry out the cutting edge Milling Process, and the cutter of Digit Control Machine Tool uses superhard milling cutter.
Milling cutter is selected: select the total principle of cutter be suitable for, safety, economy.Satisfying under the prerequisite of processing request, the outstanding profound degree of cutter is short as far as possible, and tool diameter is big as far as possible, helps reducing the roughness of finished surface, with rigidity, heat radiation and the cutter life of raising tooling system, but should notice that the tool radius at last clear angle should be less than the profile minimum profile curvature radius.Through overtesting relatively, the superhard processability price ratio that two brand cutters carry out cutting edge below is higher: the superhard six sword slotting cutters (CEPR-TH) of Hitachi's whole hard alloy; The superhard six sword slotting cutters (DZH-SEFS) of the outstanding whole hard alloy of black pigment used by women in ancient times to paint their eyebrows.
Lathe is selected: select machine tool system good rigidly, the Digit Control Machine Tool that has closed loop servo system that precision is high for use.
Parameter is selected: cutting data changes because of each lathe, workpiece material, cutting way, looks concrete condition and selects different parameters.Major parameter has: speed of mainshaft S=1000V/ π D (r/min), and in the formula: V-cutting speed, D-tool diameter.
Feed speed F=f s z (mm/min) is in the formula: f-feed engagement, s-speed of mainshaft, z-cutter tooth number.
Major parameter such as following table: (be applicable to level and smooth profile processing, the turning reaches with the circular arc place and will suitably reduce according to surplus and hardness S, F.)
Points for attention:
1. directly cutting edge is worked into ideal dimensions owing to superhard processing, so surplus must be even after requiring semifinishing, the cutting edge margin width also will meet the requirements.
2. because cutting edge is to work under the guiding of pilot hole, so the processing of the superhard processing of cutting edge and pilot hole will be finished with in a clamping.
The rigidity of the Digit Control Machine Tool that superhard processing is required and precision will reach corresponding requirement, the precision that can reach by the VDI3441 standard, otherwise superhard processing will lose meaning.
3. the Quenching Treatment of cutting edge will guarantee each piece hardness near consistent, otherwise the cutting edge precision that processes has difference, is unfavorable for the assurance in cutting edge gap, also influences cutter life.
4. to adopt compressed air cooling in the process and blow away iron filings, prevent that iron filings from bringing the damage blade into.
5. the superhard processing of cutting edge must be after profile fine finishining be finished, if process the cutting edge reprocessing profile cutting edge sword that easily jumps.
6. because the durability of climb cutting process tool and surface quality and productivity ratio all than upmilling height, and are not easy to produce over-cutting, therefore to adopt climb cutting processing.
7. owing to reasons such as tool wear and cutter relievinves, actual value processing and theoretical value have certain error, and machining the back operating personnel in the superhard process neutralization of cutting edge will constantly measure, and guarantees to realize the design accuracy and the gap of cutting edge.The gap also needs to realize by adding cutter compensation in case of necessity.
Because the cutting edge material of full-sized car covering blanking die adopts superior alloy steel more, back, back hardness height (HRC55-HRC65) quenches, therefore also very serious to the wearing and tearing of superhard process tool, after the cutting edge length of superhard process tool processing surpasses 25mm, this cutter just can not be used further to fine finishining, semifinishing after can be used for quenching reduces accurately machined surplus.If surplus is uniform 0.1mm, be equipped with the suitable type of cooling again, prolongation cutter life that can be suitable.
Claims (4)
1. the processing method of trimming edge of blanking die is carried out after die face fine finishining is finished, and it is characterized in that, may further comprise the steps:
Cutting edge semifinishing step: cutting edge is carried out semifinishing, and patrix cutting edge margin width is not more than 25mm, and the outer cutting edge margin width of counterdie is not more than 20mm, and counterdie inner cutter hole margin width is not more than 15mm; Reservation allowance after the cutting edge semifinishing is 0.2-0.3mm; Reservation allowance after the described cutting edge semifinishing requires evenly;
Cutting edge quenching step: cutting edge is quenched, and the hardness after cutting edge quenches is HRC 55-HRC 65;
The superhard procedure of processing of cutting edge: the workpiece after will quenching uses Digit Control Machine Tool to carry out the cutting edge Milling Process, and the cutter of Digit Control Machine Tool uses superhard milling cutter.
2. the processing method of trimming edge of blanking die as claimed in claim 1 is characterized in that: the hardness requirement unanimity after described cutting edge quenches.
3. the processing method of trimming edge of blanking die as claimed in claim 1 is characterized in that: in the superhard procedure of processing of described cutting edge, adopt the compressed air cooling and blow away iron filings.
4. the processing method of trimming edge of blanking die as claimed in claim 1 is characterized in that: in the superhard procedure of processing of described cutting edge, Milling Process adopts the climb cutting processing method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100178075A CN101633114B (en) | 2009-08-04 | 2009-08-04 | Processing method for trimming edge of blanking die |
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| CN2009100178075A CN101633114B (en) | 2009-08-04 | 2009-08-04 | Processing method for trimming edge of blanking die |
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| CN101633114B true CN101633114B (en) | 2011-03-30 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521592B (en) * | 2013-02-27 | 2015-10-28 | 上海汇众汽车制造有限公司 | Improve the method for quality of fracture of blank of high-strength steel |
| CN105312847A (en) * | 2014-07-28 | 2016-02-10 | 陕西柴油机重工有限公司 | Machining method of diesel engine spherical pair parts |
| CN106239071B (en) * | 2016-08-25 | 2018-08-07 | 北汽福田汽车股份有限公司 | A kind of die processing method |
| CN107160120A (en) * | 2017-05-13 | 2017-09-15 | 合肥鼎鑫模具有限公司 | A kind of processing method of car panel die trimming edge |
| CN109277786B (en) * | 2017-07-19 | 2021-01-05 | 富鼎电子科技(嘉善)有限公司 | Cutting die machining method |
| CN107390642B (en) * | 2017-07-24 | 2019-05-03 | 东莞市中泰模具股份有限公司 | The deburring cutter block of computer readable storage medium and the application medium produces lathes |
| CN109128731A (en) * | 2018-09-25 | 2019-01-04 | 山东普信模具有限公司 | A kind of Press Tools for Automobiles trimming edge processing method |
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