CN1429672A

CN1429672A - Method of locating reference point in mould process complementary surface designing

Info

Publication number: CN1429672A
Application number: CN 01139299
Authority: CN
Inventors: 张树乾; 张凯元
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-30
Filing date: 2001-12-30
Publication date: 2003-07-16
Anticipated expiration: 2021-12-30
Also published as: CN1262369C

Abstract

A method for locating the reference point in the technological supplementing surface design of dies for the covering part of car includes such steps as according to the 3-D curved surface numeral model, determining the parameters (the peripheral length and the width of female die, the thickness of closed lower and upper die holders, the thickness of male die, the central distance between guide posts, the guide post holes and the guide sleeve holes), choosing the standard die frame, determining the coordinate origin of reference point on symmetrical central axis, and using it as new locating coordinate value, which is the optimal locating point.

Description

The method of reference point in mould process complementary surface designing location

Technical field

The present invention relates to the mould manufacturing.

Background technology

The mould design is the source of entire die manufacture process, is the link of most critical in the entire die manufacture process.Wherein, process complementary surface design basis point location is crucial key.

Before 1979, the benchmark of mould design, manufacturing processing, assembling check etc. mainly adopts a vapour Jiefang brand automobile Stamping Die Design method of the former Soviet Union, be benchmark promptly with the center of die line, its shortcoming is unreliable, do not consider mould reference for installation in press, and Japan, Germany, the U.S. are that design basis is more advanced with the part three-dimensional surface model, and it is the benchmark system of our present mould design.With the part three-dimensional surface model is that the benchmark system of benchmark still has some deficits, and does not also consider the reference for installation of mould in press, need further develop.

Summary of the invention

The method that the purpose of this invention is to provide a kind of reference point in mould process complementary surface designing location, mould reference for installation, Sheet Metal Forming Technology benchmark, die face benchmark, mould structure design basis, mold production process benchmark, reference for assembling, calibration reference and their dimension conversion or the like are united, and definite process complementary surface design basis point.

For achieving the above object, solution of the present invention is: the method for a kind of reference point in mould process complementary surface designing location is characterized in that adopting following steps:

(1) determines that according to part product figure three-dimension curved surface mathematical model the die circumference is long and wide, shut height die shoe and upper bolster thickness, convex mould base thickness, guide pillar centre-to-centre spacing S and guide pillar hole, parameter choice criteria mould bases such as dowel hole, for example guide pillar bearing quality steel in the middle of 1208 cold punchings;

(2) be punch and die processing technology benchmark and labeled standards mould bases upper bolster and die shoe symmetrical centre O with standard die set guide pillar hole and dowel hole ₃And O ₁, also be punch center of circle B and die center of circle O ₁The former point value of axial line position coordinates;

Because it is fixed that the center of standard die set is come by the punching press center, this symmetrical centre O ₁O ₃With make a concerted effort center and the press ram center line of blanking pressure be unified, overlap i.e. symmetrical centre O ₁O ₃With Sheet Metal Forming Technology benchmark and die punch manufacturing process benchmark be that complete unity overlaps;

(3) reference for assembling of blanking die, perforating die, compound die is selected in punch center line BO ₂On, promptly with symmetrical centre O ₁O ₃Also be unified the coincidence;

(4) determine that according to three-dimension curved surface mathematical model parameter and standard die set parameter B datum mark origin of coordinates value is the new elements of a fix value of design basis on the symmetrical centre axis, thereby determine that the B datum mark is a process complementary surface design basis anchor point.

Because having adopted such scheme, B datum mark is the center of the unified datum mark of each road technology, with the mode dimensioning of coordinate dimension.After the B datum mark was selected, because unifying datum adopts standard die set again, the coordinate dimension of any one point can both be calculated exactly on the mould product.This designs and calculates and make to mould and brings great convenience.With the processing content of each operation, dimensional requirement, working position, pressing direction, Center of Pressure and correlation etc. are expressed with (three-dimensional) figure, and this figure is called the processing instruction drawing.The processing instruction drawing comes into plain view the relation of each procedure, and this is very favourable to mould design, manufacturing processing, assembling check and die trial adjustment.

Description of drawings

Fig. 1 is the schematic diagram of an embodiment of the present invention.

The specific embodiment

Seeing also Fig. 1, is the embodiment that uses the process complementary surface design basis best orientation point of the mould that the present invention determines a kind of revolving parts.The parts that show among the figure comprise: straight pin 1, die shoe 2, insulation board 3, die 4, clamping ring 5, guide pillar 6, punch 7, convex mould base 8, discharge ring 9, guide pin bushing 10, B datum mark 11, interior angle screw 12, dead ring 13, hex screw 14, screw rod 15 and upper bolster 16.

Determine that according to part product figure three-dimension curved surface mathematical model die 4 circumferences are long and wide, shut height die shoe 2 and upper bolster 16 thickness, convex mould base 8 thickness, guide pillar centre-to-centre spacing S and guide pillar hole 6, parameters such as dowel hole 10 are chosen the middle guide pillar bearing quality steel of 1208 cold punchings Standard Module;

With standard die set guide pillar hole 6 and dowel hole 10 is punch and die processing technology benchmark and labeled standards mould bases upper bolster 16 and die shoe 2 symmetrical centre O ₃And O ₁, also be punch center of circle B and die center of circle O ₁The former point value of axial line position coordinates;

Because it is fixed that the center of standard die set is come by the punching press center, this symmetrical centre O ₁O ₃With make a concerted effort center and the pressure utmost point slide block center line of blanking pressure be unified coincidence, i.e. symmetrical centre O ₁O ₃With Sheet Metal Forming Technology benchmark and die punch manufacturing process benchmark be that complete unity overlaps;

The reference for assembling of blanking die, perforating die, compound die is selected in punch 7 center lines or symmetrical centre axis BO substantially ₂On, i.e. symmetrical centre O ₁O ₃Also be unified the coincidence;

According to B datum mark 11 origin of coordinates values on three-dimension curved surface mathematical model parameter and the standard die set parameter mark symmetrical centre axis is the new elements of a fix value of design basis, thereby determines that B datum mark 11 is process complementary surface design basis best orientation points.

The B benchmark is that standard die set is a carrier, guide pillar dowel hole technological datum is a tie, its technological process is that mould reference for installation, Sheet Metal Forming Technology benchmark, process complementary surface design basis, mould structure design basis, mold production process benchmark, equipment benchmark, check benchmark and their dimension conversion or the like are united, the new benchmark system of the science of setting up, and to try to achieve the B datum mark be process complementary surface design basis best orientation point.

The B benchmark is a process complementary surface design basis best orientation point, and it is the center of setting up the unified design basis point of new each procedure of benchmark system of science.Get B datum mark origin of coordinates value, draw the processing instruction drawing according to the dimension conversion of three-dimension curved surface mathematical model parameter and standard die set parameter and each procedure and just can set up the new benchmark system of producing corresponding mould, the new benchmark system of specialized craft science is distributed in resource-sharing rationally as car panel die.

After the B datum mark is selected,,, draw mould general assembly processing instruction drawing in view of the above so the coordinate dimension of any one point can both be calculated exactly on the mould because unifying datum adopts standard die set again; Carry out the mould structure design with new benchmark system and determine production technical standard, pressing equipment, mold materials, mould standard spare or the like; Die face design (CAE is analyzed in the punch forming simulation) CAD is the process complementary surface design basis with the B datum mark, carries out the three dimensional design of mould and the three dimensional design of process complementary surface in computer; Concavo-convex mould parts blank is prepared: 70% international procurement commercialized supplies such as mold materials blank section bar such as the honest part of die punch foundry goods gold, mould machining CAM, punch and die separate machined, but be that technological datum is processed all with standard die set guide pillar dowel hole, adopting standard die set to set up new benchmark system makes the technological datum design basis unified and guaranteed that CAD/CAM and CNC High-speed Computer number control mill processing and the directly fine finishining of networking of three-coordinates measuring machine, it makes die punch development and Design make one-time success rate 90% or more (get the B benchmark is a stretching die process complementary surface design basis on the punch, die face is that benchmark carries out virtual manufacturing to the master cast that CAD/CAM processes); Assembling is adjusted CAE and is finally generated mould numeral mould product; Be assemblied in and carry out virtual manufacturing CAE on the forcing press earlier as long as guide pillar is inserted close in the guide pin bushing punch and die during the die trial of mold arrangement assembling matched moulds, the unification that makes design basis, technological datum, reference for assembling, mould reference for installation, Sheet Metal Forming Technology benchmark etc. owing to the foundation and the new location of design basis point of new benchmark system, its die trial success rate is more than 90%, the final generation and actual mould product function, performance, mould product that structure is identical.

Automobile wing outer covering piece stretching die is complex-shaped and the assembly relation requirement is relatively stricter, its general part adopts standard die set, punch and die separate machined, but be benchmark processing with standard die set guide pillar dowel hole all, make the A benchmark, datum mark is unified on B benchmark and the punch.

Punch process complementary surface design basis location, punch are to be the manufacturing process benchmark with four guide pillar holes of standard die set, and this technological datum and Sheet Metal Forming Technology benchmark are that the Center of Pressure is unified.Utilize AutoCAD contour loop center solving method can try to achieve Pressure Center of Blanking Die rapidly and accurately, promptly try to achieve both and unify benchmark and claim A benchmark, try to achieve the B benchmark, the B benchmark is a punch process complementary surface design basis best orientation point.

Punch three-dimensional CAD/CAM design and fine finishining: with the B benchmark is punch process complementary surface design basis, realize CAD/CAM and the CNC numerical control multi-shaft mills and three-coordinates measuring machine is directly networked fine finishining, unification because of design basis, technological datum, measuring basis, its machining accuracy height, cycle is short, makes the car panel die exploitation make one-time success rate and reaches 90%.

Concave die cavity three-dimensional CAD/CAM design and fine finishining: the B benchmark also is a die process complementary surface design basis best orientation point, make A benchmark B unifying datum, getting datum mark B benchmark is stretching die die process complementary surface design basis, the die profile is a benchmark with the master cast chamber of CAD/CAM processing, its precision height, cycle is short, and one-time success rate reaches more than 90%.

Punch and die close, be assemblied on the forcing press, make the Sheet Metal Forming Technology benchmark, the manufacturing process benchmark, design basis, reference for assembling is unified, makes A benchmark B unifying datum, the high-intensity resin molding concave die of casting Ciba, clearance between punch and die adopts the special-purpose wax disk(-sc) of import accurately to control the concavo-convex mould of breakdown, during the die trial of mould assembling matched moulds, as long as guide pillar is inserted in the guide pin bushing, its punch and die gap die trial success rate of uniform and stable this new technology path new technology reaches more than 90%.

Claims

1. the method for reference point in mould process complementary surface designing location is characterized in that adopting following steps:

(1) determines that according to part product figure three-dimension curved surface mathematical model the die circumference is long and wide, shut height die shoe and upper bolster thickness, convex mould base thickness, guide pillar centre-to-centre spacing S and guide pillar hole, parameter choice criteria mould bases such as dowel hole;