CN105487488A - Progressive die complex metal plate member stamping process sequence planning method - Google Patents

Abstract

The invention discloses a progressive die complex metal sheet member stamping process sequence planning method, comprising steps of performing metal plate characteristic identification, bending and expanding, generating a stock layout characteristic, and formulating a stock layout rule, listing all possible layout schemes by adopting a sequencing planning matrix, a synchronization sequence planning matrix, and an idle station planning matrix, listing all possible stock layout schemes, establishing an influence factor set U=[u1,u2,u3... un] and a corresponding weight set A=[w1,w2,w3, ...,wn], wherein w1+w2+w3+...+wn=1 and 0<=w1,w2,w3, ...,wn<=1, and calculating the multi-norm decision total score Ev sigma(j=i)<n>wjuj=w1*u1+w2*u2+w3*u3...wn*un according to the influence factor and the corresponding weight, wherein when the Ev value is the maximum, the scheme is optimal. The invention is simple and can obtain the optimal scheme through the data, can manufacture the correct working station stock layout without the stamping and processing knowledge and experience of the design personnel, gets rid of the designer, realizes the intelligent designing in a real meaning, and realizes the processing of the standardization production.

Description

A kind of progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method

Technical field

The present invention relates to a kind of process sequence planing method, be specifically related to a kind of progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method.

Background technology

From the seventies in last century, the research of area of computer aided punching process planning just starts, Schaffer (1971) and Nakahara etc. (1978) study material strip to plan the problem designed with progressive press tool the earliest, they mainly use CAD/CAM technology to solve the problem of Stamping Die Design robotization, more research was had to be incorporated into by additive method in CAD/CAM environment afterwards successively, study plate Automatic-expanding as (1988) such as Bergstrom and shear and bend institute and must calculate by a stamping press, Choi etc. (1999) use knowledge base rule, obtain certain effect.In commercial software, there are Pro/SHEETMETAL, NXProgressiveDieWizard etc. of Pro/ENGINEER all to provide better User's Interface, but still can not carry out being widely used in that there is characteristic feature stamping parts automated reasoning stock layout, drift segmentation still needs deviser to carry out interactive mode to most of important decision to select, can not realize the Automation Design with configuration.

In order to solve huge search space and reduce computing time, use AI and search technique that material strip project study development is had in recent years to be in progress by a larger margin, Inui etc. (1999) utilize the screening of topology restriction (topologicalconstraints) and recycle the result of calculation previously completed and plan to accelerate bending, Thanapandi etc. (2001) then use genetic algorithm to do similar trial, Tor etc. (2005) are in conjunction with Object-oriented Technique and BlackboardArchitecture, Zhang etc. (2005) are then further combined with Case-BasedReasoning, Ong etc. (1997) use FuzzySetTheory, take a broad view of various research mainly in the feasibility of this Technology application of checking, the application of its validity is only limited to this case (Cheok and Nee, 1998), moreover various AI and search technique are except not relating to drift segmentation subject under discussion, and more excellent solution (Kannan and Shunmugam may be ignored, 2009b).

Taiwan University of Science and Technology woods is pacified clearly and to deepen continuously research to this field for many years, main with 3DCAD software environment, in conjunction with knowledge base with search the robotization of skill energy and produce all feasible material strips and to plan and plate is arranged, interference checking and mould center of gravity calculation function can be performed, automatically to produce required drift and die holder design simultaneously.Lin Bai village is then with design software CATIA, and apply VB program language and carry out customized, secondary development goes out " progressive die the Automation Design system ", this system can input according to user and comprise profile external form, product cut-off rule, drift, curved edge cutter, cam cutting knife and numeral and Word message, namely can automatically perform continuous punch pressing mould structure design according to the information of input and assembly group vertical.

In order to reduce manual operation and accelerate material strip planning and design efficiency, the people such as Li, Tang and Gao is by its feature of Direct Recognition in cad model and by each feature reflection in processing planning procedure, but there are two weak points in this practice, secondly be first often lack machining information in cad model, discernible feature still must have good planning could by each feature proper placement to each station.Up to the present, feature identification aspect has attracted a lot of scholars to study, such as Kannan and Shunmugam adopts plate Interchange Format for input, their system identifiable design known goes out a lot of plate features, as: impression (embossing), flange (flanging), blinds hole (louvering) etc.

Material strip sequential program(me) is exactly hunt out optimum solution in the numerous schemes determined.In order to improve search efficiency and reduce computing time, be in progress by a larger margin by using AI and search technique to make material strip project study development have in recent years, Inui etc. utilize the screening of topology restriction (topologicalconstraints) and recycle the result of calculation previously completed and plan to accelerate bending, Thanapandi etc. then use genetic algorithm to do similar trial, Tor etc. are in conjunction with Object-oriented Technique and BlackboardArchitecture, Zhang etc. are then further combined with Case-BasedReasoning, Ong etc. use fuzzy set theory FuzzySetTheory to screen.At present, the research of various method is mainly the feasibility verifying this Technology application, the validity of its application is only limited to part case (Cheok and Nee), various AI and search technique be not except relating to drift segmentation problem, and existence may neglect globally optimal solution (Kannan and Shunmugam).Lin and Sheu attempts launching various possibility in conjunction with laminated method and the method for exhaustion, recycles various rule general choosing and falls infeasible scheme, find out all feasible solutions, but the calculating of the method is very loaded down with trivial details.

Multi-station progressive die is a kind of high-level efficiency, high precision, long-life diel, at automobile structure, the field application such as five metals household electrical appliances and electronic device widely due to progressive die can pressing machine-secondary stroke in constitution become drawing, be shaped, multiple operations such as bending and stamping-out, therefore, the utilization factor of lathe can be improved very significantly, realize the automated production of product, reduce manual operation and reduce production safety risk but, multi-station progressive die is adopted to carry out the part processed, there is operation many, the features such as technological design is complicated, mould structure general very complicated and, asking of front and back operation is all association, at product, need in the process of billot and Design of Dies to consider very many factors, ignoring wherein any one very little link all likely causes product quality defective, mould is reprocessed and is scrapped even completely, these all greatly increase the difficulty of progressive die technique and Design of Dies, usual needs could be competent at by the engineering technical personnel with Design of progressive die for metal experience for many years.

During the metal parts of progressive die processing sheet material, main Sheet Metal Forming Technology has shearing, punching, bending, shaping, stretching etc.In process of production, after the expansion external form of panel beating finished product is determined, then slip-stick artist draws panel beating product stretch-out view, then according to principle of design and thumb rule, need the part of punch process be evenly distributed on every one station of progressive press tool by product, first think deeply in principle how to carry out cutting edge region, punching areas die-cut after, then do follow-up bending and formed machining arrangement, finally make punch die according to design drawing again.Because part operation is more, make the flow process of punch process become complex, require that designer grasps the principle of punch process, the kind of punch process, and the method etc. of punch process, also need to possess sufficient knowledge and experience, just can make correct station stock layout.

Summary of the invention

The present invention seeks to: a kind of progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method is provided, not only method is simple, and draw optimal case by data, designer is not needed to grasp sufficient punch process knowledge and experience, just can make correct station stock layout, thus break away from dependence deviser experience, achieve intelligent design truly, realize standardized production processing.

Technical scheme of the present invention is: a kind of progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method, comprises the following steps:

Step 1: sheet metal component feature identification, bending launches, generate stock layout feature, formulates stock layout rule;

Step 2: adopt sequencing planning matrix, synchronizing sequence planning matrix, idle station planning matrix, list all feasible layout project;

Step 3: set up factor of influence collection U={u ₁, u ₂, u ₃..., u _nand its respective weights collection A={w ₁, w ₂, w ₃..., w _n, wherein w ₁+ w ₂+ w ₃+ ...+w _n=1, and 0≤w ₁, w ₂, w ₃..., w _n≤ 1, according to factor of influence and its respective weights, calculate the total score E of multiple criteria decision making (MCDM) _v,

$E_v={\mathrm{\&Sigma;}}_{j=1}^n{w}_j{u}_j=w_1\&times;u_1+w_2\&times;u_2+w_3\&times;u_3+...+w_n\&times;u_n,$ Work as E _vwhen getting maximal value, be optimal case.

As preferred technical scheme, step 1) described in sheet metal component feature comprise punching, bending, stretching, flange, convex closure, flattening, otch.

As preferred technical scheme, with reference to shown in Fig. 6, step 1) described in sheet metal component bending to launch concrete grammar as follows: with one of them plane of sheet metal component for reference field, search for its lap, find out all folding surfaces and bending feature corresponding to folding surface, then bending feature is flattened.

As preferred technical scheme, step 2) described in the concrete grammar of sequencing planning matrix as follows:

According to the sequencing planning matrix of technique stock layout generate rule m × n element, and in different stock layout rules, define the weight of different size, before what weight was large come, after what weight was little come, the element value a in priority sequential program(me) matrix _ijbe 1 ,-1 or 0, and there is following relation:

wherein: Σ a _ij=0.

As preferred technical scheme, step 2) described in the concrete grammar of synchronizing sequence planning matrix as follows:

The synchronizing sequence planning matrix generating m × n element according to distance restraint relation represents whether be arranged on same work step between each feature, the element value b in synchronizing sequence planning matrix _ijbe 1 ,-1 or 0, and there is following relation:

As preferred technical scheme, step 2) described in the concrete grammar of idle station planning matrix as follows:

When adjacent two work step distances exist punch-die installation overlap, interference problem, increase empty work step between adjacent two work steps, the element value k in idle station planning matrix _ijbe 1 or 0, and there is following relation:

As preferred technical scheme, step 3) described in factor of influence comprise station number factor u ₁, balancing the load factor u ₂, billot stable factor u ₃, its respective weights is respectively w ₁, w ₂, w ₃, and w ₁=0.5 ~ 0.6, w ₂=0.2 ~ 0.3, w ₃=0.18 ~ 0.23.

As preferred technical scheme, described station number factor u ₁circular as follows:

According to stock layout rule, the minimum value of station number N is 2, maximal value is n;

Setting works as N=2, u ₁get maximal value 100; As N=n, u ₁get minimum value 10; As 2 < N < n, u ₁=100-90 × (N-2)/(n-2), with reference to shown in Fig. 7, consider from the angle manufactured, N is more for station number, and the volume of mould is larger, and cost is higher, and required punch press erection space is larger, and therefore station number is fewer, more has advantage.

As preferred technical scheme, described balancing the load factor u ₂circular as follows:

Progressive die continuous print is harmonious, and require that drift load is even as far as possible, joint force point is as far as possible close to mold shape center, and the balancing the load factor compares equivalent force application point and mold shape center consistance, P _ito mould action point of force application (X _i, Y _i), by equalising torque formulae discovery.

The calculating of blanking pressure and bending force is by following formulae discovery, and wherein l is bending or sheared length, and t is the thickness of material, δ _bfor the strength degree of material, C _s, C _l, C _ube respectively material coefficient, check in from Engineered Materials Handbook.

Blanking pressure: F _s=C _s× l × t × δ _b

U-shaped bending force: F _u=(C _u/ 3) × l × t × δ _b

L shape bending force: F _l=(C _l/ 6) × l × t × δ _b

With reference to shown in Fig. 8, the center origin of setting mould coordinate is O, walks in operation at n, and U-bend number of tracks amount is that to bend quantity be j to i, L shape, and stamping-out quantity is k.Define successively along X-axis position, U-shaped is bent into P _i, position coordinates is (x _i, y _i); L shape is bent into P _j, position coordinates is (x _j, y _j); Stamping-out is P _k, position coordinates is (x _k, y _k).

Total stamping press F can by following formulae discovery:

$F={\&Sigma;}_{i=1}^f{F}_U+{\&Sigma;}_{j=1}^m{F}_L+{\&Sigma;}_{k=1}^s{F}_S={\mathrm{\&sigma;}}_{b}t({\&Sigma;}_{i=1}^f\frac{G_U{L}_i}{3}+{\&Sigma;}_{i=1}^f\frac{C_L{L}_j}{6}+{\&Sigma;}_{i=1}^f{L}_k)$

N-th step stamping press center by following formulae discovery:

$\stackrel{\&OverBar;}{x}=\frac{{\&Sigma;}_{i=1}^f\frac{x_i{C}_U{L}_i}{3}+{\&Sigma;}_{i=1}^f\frac{x_j{C}_L{L}_i}{6}+{\&Sigma;}_{i=1}^f{x}_k{L}_k}{{\&Sigma;}_{i=1}^f\frac{C_U{L}_i}{3}+{\&Sigma;}_{i=1}^f\frac{C_L{L}_j}{6}+{\&Sigma;}_{i=1}^f{L}_k}$

$\stackrel{\&OverBar;}{y}=\frac{{\&Sigma;}_{i=1}^f\frac{y_i{C}_U{L}_i}{3}+{\&Sigma;}_{i=1}^f\frac{y_j{C}_L{L}_i}{6}+{\&Sigma;}_{i=1}^f{y}_k{L}_k}{{\&Sigma;}_{i=1}^f\frac{C_U{L}_i}{3}+{\&Sigma;}_{i=1}^f\frac{C_L{L}_j}{6}+{\&Sigma;}_{i=1}^f{L}_k}$

The distance d of actual punching press centre distance mold center O point is

$d=\sqrt{{\stackrel{\&OverBar;}{x}}^2+{\stackrel{\&OverBar;}{y}}^2}$

Practice shows the maximum offset D that d allows _max,

Work as d=0, u ₂get maximal value 100; Work as d=D _max, u ₂get minimum value 10; As 0 < d < D _maxtime, $u_2=100\&times;(1-\frac{0.9d}{D_{max}}).$

As preferred technical scheme, described billot stable factor u ₃circular as follows:

Billot is being sent in process, and upper for band material waste material cuts by blanking punch, and sheet metal part and billot connection area constantly reduce.When coupling part is very few, billot rocks or swings sending in process easily to produce, and this can have influence on processing precision of products.

Different according to the trend that connecting length reduces, sheet metal part and billot connecting length are divided into straight line L _line, L on curve _up, L under curve _down, wave L _wave, as shown in Figure 9.Corresponding billot stable factor is defined as u respectively _line, u _up, u _down, u _wave, under often kind of curve, under all work steps, the connecting length summation of corresponding sheet metal part and billot is respectively L _line, L _up, L _down, L _wave, length summation is larger, represents billot stability better.By intuitively comparing, u can be drawn _down<u _line<u _up.

With the station number of sheet metal part be X-axis, billot connecting length sets up rectangular coordinate system for Y-axis,

$\begin{array}{cc}{u}_3=90\&times;(1+\frac{\mathrm{\&Delta;}L}{{\mathrm{\&Sigma;L}}_{line}}),& \mathrm{\&Delta;}L={\mathrm{\&Sigma;L}}_i-{\mathrm{\&Sigma;L}}_{line}\end{array};$

Wherein for sheet metal part under all station numbers and billot connecting length summation, sheet metal part during for linearly reducing and billot connecting length summation.

Sequence of operation incidence matrix generates according to geometric properties and constraint rule, and concrete rule, with reference to design manual, Principles of Plastic Molding and corresponding expertise, formulates 17 rules.

First rule 1 (attached rule): if sheet metal component is characterized as bending features, then excise bending waste material around;

Rule 2 (positioning accuracy requests): rush correcting pin-and-hole and be arranged in the incipient first step, guarantee the precision being with material conveying;

Rule 3 (reference characteristic): if a certain stamped feature is according to a certain fixed reference feature, then fixed reference feature is preferential;

The accuracy requirement of rule 4:(outline) if having macropore and aperture by too near, then subpunch macropore backlash aperture, otherwise the aperture first filled can deform when rushing macropore;

Rule 5:(becomes this rule) hole of side surface direction, be arranged in bending, stretching preshoot as far as possible, punching need increase wedge transmission upon bending, increases cost;

Rule 6:(small distance rule) hole wall, limit, hole are less than the thick t of material or less than 2mm, should go out on two stations by substep, to strengthen strength of concave mould and to expand the installation site of punch on its fixed head in stamping;

Rule 7:(strength of concave mould rule) if punching and waste material excision can not be arranged in same step, then before punching is arranged in excision waste material;

Rule 8:(accuracy requirement rule) if the distance between hole is enough, and have accuracy requirement, tolerance value is less than 0.01mm, and this some holes need be arranged on a station and go out;

Rule 9:(rule of detachment) be with material separation circuit to be arranged in final step;

Rule 10:(order bending rule) if a face exists many places bending, then need to carry out bending according to by outer order inward.

Rule 11:(Synchronous Bending rule) on the same axis bending, it is bending that two planes have right alignment to require, and be less than thick Z-shaped of 5 times of material for the bending degree of depth and bend, and should be arranged in Synchronous Bending.

Rule 12:(bending sequence rule) in order to reduce the impact of curved shape, bending away from female plane, it requires high, should bend earlier.

Rule 13:(number of bends gauge is then) bending quantity is more in same step, more to the impact of female plane, larger on overall precision impact.

Rule 14:(angle of bend rule) angle of bend between female plane and each Plane of rotation is when being greater than 90 °, bendingly should be divided into one or more bendingly to carry out.

Rule 15:(hole successively rule) internal holes to be positioned at outside die-cut before carry out.

Rule 16:(synchronous stamping-out area rule) on same work step, the workpiece that unsuitable stamping-out area difference is too large, avoids the damage of mould.

Rule 17:(sends material lift rule to) billot sends in process, and person at the bottom of material lift height is excellent.

Advantage of the present invention is: the present invention adopts sequencing planning matrix, synchronizing sequence planning matrix, idle station planning matrix, list all feasible arrangement, criteria decision-making method is finally used to assess reasonable plan, select optimal case, not only method is simple, and draw optimal case by data, designer is not needed to grasp sufficient punch process knowledge and experience, just can make correct station stock layout, thus break away from dependence deviser experience, achieve intelligent design truly, and then realize standardized production processing.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described:

Fig. 1 is sheet metal part schematic diagram of the present invention;

Fig. 2 is that sheet metal part of the present invention launches schematic diagram;

Fig. 3 is waste material design drawing of the present invention;

Fig. 4 is the optimum layout project schematic diagram of the present invention;

Fig. 5 is the process flow diagram of progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method of the present invention;

Fig. 6 is that sheet metal component bending of the present invention launches process flow diagram;

Fig. 7 is station number Effects of Factors schematic diagram;

Fig. 8 is balancing the load factor drift application point schematic diagram;

Fig. 9 is sheet metal part and billot connecting length relation schematic diagram;

Embodiment

Embodiment:

1, sheet metal part feature is identified:

The typical feature of sheet metal component has punching, shearing, bending, stretching, partial plastic forming etc., and sheet metal part as shown in Figure 1, essential characteristic has: 4 place's bending feature B1, B2, B3, B4,2 place's punching P1, P2,1 place partial plastic forming feature T1.

2, bending launches, generates stock layout feature:

With reference to shown in Fig. 2, sheet metal part is launched, band material carries out layout, carries out waste material design, wherein punching class: punching P1, punching P2, punching P3, punching P4; Blanking class: blanking P5, blanking P6, blanking P7; Bending class: bending B1, bending B2, bending B3, bending B4; Shaping class: F1, the characteristic position of institute as shown in Figure 3.

3, sequencing planning matrix is generated

According to technique stock layout generate rule operator precedence sequential matrix, and in different stock layout rules, define the weight of different size, before what weight was large come, after what weight was little come, as shown in table 1, when eigenwert is 1, before i operates in j operation; When eigenwert is-1, after i operates in j operation; When eigenwert is 0, i operates in j and operates onrelevant.

Table 1 is sequence of operation planning matrix table successively:

4, synchronizing sequence planning matrix is generated

Operation sequencing planning matrix defines sequencing according to constraint between manufacture and solid, and determine synchronous operation sequential program(me) matrix, as shown in table 2, when eigenwert is 1, two operations can be arranged on same work step; When eigenwert is 0, two operations can not be arranged on same work step.

Table 2 synchronous operation sequential program(me) matrix table:

Synchronous operation can be drawn: punching homochronousness: (P1, P2), (P3, P4) from table 2; Bending homochronousness: (B1, B2).

5, idle station planning matrix is generated

Operation sequencing planning matrix defines sequencing according to constraint between manufacture and solid, according to idle station generate rule idle station sequence of operation planning matrix, as shown in table 3.When eigenwert is 1, need to insert room, then do not need when eigenwert is 0, the alphabetical I of idle station represents.

Table 3 idle station sequence of operation planning matrix table

6, layout project generates

According to order incidence matrix, sequence synchronization matrix, idle station connecting matrix, list all possible arrangement situation, as shown in table 4.Wherein 8 work steps 4 kinds: G _8-1, G _8-2, G _8-3, G _8-4, 9 work steps 12 kinds: G _9-1, G _9-2, G _9-3, G _9-4, G _9-5, G _9-6, G _9-7, G _9-8, G _9-9, G _9-10, G _9-11, G _9-12; 10 work steps 4 kinds: G10-1, G10-2, G10-3, G10-4, altogether 21 kinds of arrangement modes.

The all arrangement schemes of table 4

Noun	Step number	Arrangement mode
			G 8-1	8	(P 3,P 4)→(P 1,P 2)→P 7L→P 5L→B 4→(B 1,B 2,B 3)→F 1→P 6
G 8-2	8	(P 3,P 4)→(P 1,P 2)→P 7L→P 5L→(B 1,B 2,B 4)→B 3→F 1→P 6
			G 8-3	8	(P 3,P 4)→(P 1,P 2)→P 7L→B 4→I→P 5L→(B 1,B 2,B 3)→F 1→P 6
G 8-4	8	(P 3,P 4)→(P 1,P 2)→P 7L→B 4→B 3→I→(F 1,P 5L)→(B 1,B 2)→P 6
			G 9-1	9	(P 3,P 4)→(P 1,P 2)→I→P 5L→P 7L→B 4→(B 1,B 2,B 3)→F 1→P 6
G 9-2	9	(P 3,P 4)→(P 1,P 2)→I→P 5L→P 7L→(B 1,B 2,B 4)→B 3→F 1→P 6
			G 9-3	9	(P 3,P 4)→(P 1,P 2)→P 7L→P 5L→B 4→B 3→F 1→(B 1,B 2)→P 6
G 9-4	9	(P 3,P 4)→(P 1,P 2)→P 7L→P 5L→B 4→(B 1,B 2)→B 3→F 1→P 6
			G 9-5	9	(P 3,P 4)→(P 1,P 2)→P 7L→P 5L→B 4→B 3→(B 1,B 2)→F 1→P 6
G 9-6	9	(P 3,P 4)→(P 1,P 2)→P 7L→P 5L→(B 1,B 2)→B 4→B 3→F 1→P 6
			G 9-7	9	(P 3,P 4)→(P 1,P 2)→P 7→B 4→P 5→(B 1,B 2)→B 3→F 1→P 6
G 9-8	9	(P 3,P 4)→(P 1,P 2)→P 7→B 4→P 5→B 3→(B 1,B 2)→F 1→P 6
			G 9-9	9	(P 3,P 4)→(P 1,P 2)→P 7→B 4→P 5→B 3→F 1→(B 1,B 2)→P 6
G 9-10	9	(P 3,P 4)→(P 1,P 2)→P 7L→B 4→B 3→P 5L→(B 1,B 2)→F 1→P 6
			G 9-11	9	(P 3,P 4)→(P 1,P 2)→P 7L→B 4→B 3→P 5L→F 1→(B 1,B 2)→P 6
G 9-12	9	(P 3,P 4)→(P 1,P 2)→P 7L→B 4→B 3→F 1→P 5L→(B 1,B 2)→P 6
			G 10-1	10	(P 3,P 4)→(P 1,P 2)→I→P 5L→P 7L→(B 1,B 2)→B 4→B 3→F 1→P 6
G 10-2	10	(P 3,P 4)→(P 1,P 2)→I→P 5L→P 7L→B 4→B 3→F 1→(B 1,B 2)→P 6
			G 10-3	10	(P 3,P 4)→(P 1,P 2)→I→P 5L→P 7L→B 4→B 3→(B 1,B 2)→F 1→P 6
G 10-4	10	(P 3,P 4)→(P 1,P 2)→I→P 5L→P 7L→B 4→(B 1,B 2)→B 3→F 1→P 6

7, Calculation Estimation factor of influence

According to design criteria, these schemes are passed judgment on, select optimal result.

According to evaluation mould result performance quality index, set up factor of influence collection: U={u ₁, u ₂, u ₃, wherein: u ₁: the station number factor; u ₂: the balancing the load factor; u ₃: billot stable factor;

(1) the station number factor (u ₁)

(2) the balancing the load factor (u ₂)

According to size and the position of action point of load, calculate the technique power of often kind of scheme, pressure-pad-force, Center of Pressure coordinate and load balancing factors, as shown in table 5.

Table 5 balancing the load factor reckoner

(3) billot stable factor (u ₃)

The size and the billot stable factor that calculate part and billot connecting length are listed in table 6.

Table 7 billot connecting length and stable factor

8, weight sets is set up

Each factor gives certain weighted value, and present case is got: w ₁=0.5, w ₂=0.3, w ₃=0.2, wherein w ₁+ w ₂+ w ₃=1.

9, calculate PTS and select optimal case

According to $E_v={\mathrm{\&Sigma;}}_{j=1}^n{w}_j{u}_j=w_1\&times;u_1+w_2\&times;u_2+w_3\&times;u_3+...+w_n\&times;u_n$ Calculate the score of often kind of scheme.

Table 9 scheme overall score

G is drawn from table _8-463.74 be best result, be optimal case, as shown in Figure 4.

Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.

Claims (10)

1. a progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method, is characterized in that, comprise the following steps:

Step 1: sheet metal component feature identification, bending launches, generate stock layout feature, formulates stock layout rule;

Step 2: adopt sequencing planning matrix, synchronizing sequence planning matrix, idle station planning matrix, list all feasible layout project;

Step 3: set up factor of influence collection U={u ₁, u ₂, u ₃..., u _nand its respective weights collection A={w ₁, w ₂, w ₃..., w _n, wherein w ₁+ w ₂+ w ₃+ ...+w _n=1, and 0≤w ₁, w ₂, w ₃..., w _n≤ 1, according to factor of influence and its respective weights, calculate the total score E of multiple criteria decision making (MCDM) _v,

$E_v={\&Sigma;}_{j=1}^n{w}_j{u}_j=w_1\&times;u_1+w_2\&times;u_2+w_3\&times;u_3+...+w_n\&times;u_n,$ Work as E _vwhen getting maximal value, be optimal case.

2. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 1, is characterized in that, step 1) described in sheet metal component feature comprise punching, bending, stretching, flange, convex closure, flattening, otch.

3. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 1, it is characterized in that, step 1) described in sheet metal component bending launch concrete grammar as follows: with one of them plane of sheet metal component for reference field, search for its lap, find out all folding surfaces and bending feature corresponding to folding surface, then bending feature is flattened.

4. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 1, is characterized in that, step 2) described in the concrete grammar of sequencing planning matrix as follows:

According to the sequencing planning matrix of technique stock layout generate rule m × n element, and in different stock layout rules, define the weight of different size, before what weight was large come, after what weight was little come, the element value a in priority sequential program(me) matrix _ijbe 1 ,-1 or 0, and there is following relation:

wherein: ∑ a _ij=0.

5. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 1, is characterized in that, step 2) described in the concrete grammar of synchronizing sequence planning matrix as follows:

The synchronizing sequence planning matrix generating m × n element according to distance restraint relation represents whether be arranged on same work step between each feature, the element value b in synchronizing sequence planning matrix _ijbe 1 ,-1 or 0, and there is following relation:

6. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 1, is characterized in that, step 2) described in the concrete grammar of idle station planning matrix as follows:

When adjacent two work step distances exist punch-die installation overlap, interference problem, increase empty work step between adjacent two work steps, the element value k in idle station planning matrix _ijbe 1 or 0, and there is following relation:

7. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 1, is characterized in that, step 3) described in factor of influence comprise station number factor u ₁, balancing the load factor u ₂, billot stable factor u ₃, its respective weights is respectively w ₁, w ₂, w ₃, and w ₁=0.5 ~ 0.6, w ₂=0.2 ~ 0.3, w ₃=0.18 ~ 0.23.

8. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 7, is characterized in that, described station number factor u ₁circular as follows:

According to stock layout rule, the minimum value of station number N is 2, maximal value is n;

Setting works as N=2, u ₁get maximal value 100; As N=n, u ₁get minimum value 10; As 2 < N < n, u ₁=100-90 × (N-2)/(n-2).

9. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 7, is characterized in that, described balancing the load factor u ₂circular as follows:

The distance of the center origin of setting mould coordinate to be O, d be actual punching press centre distance mold center O point, the maximum offset allowed is D _max;

Work as d=0, u ₂get maximal value 100; Work as d=D _max, u ₂get minimum value 10; As 0 < d < D _maxtime,

$u_2=100\&times;(1-\frac{0.9d}{D_{max}}).$

10. progressive die Complex Panels Sheet Metal Forming Technology sequential program(me) method according to claim 7, is characterized in that, described billot stable factor u ₃circular as follows:

With the station number of sheet metal component be X-axis, billot connecting length sets up rectangular coordinate system for Y-axis,

$u_3=90\&times;(1+\frac{\mathrm{\&Delta;}L}{{\mathrm{\&Sigma;L}}_{line}}),$ ΔL＝∑L _i-∑L _line；

Wherein ∑ L _ifor the sheet metal component under all station numbers and billot connecting length summation, ∑ L _linesheet metal component during for linearly reducing and billot connecting length summation.