CN101807066B

CN101807066B - Trimming die entrance modulus machining method of covering piece

Info

Publication number: CN101807066B
Application number: CN2010101297214A
Authority: CN
Inventors: 李树新; 王存第; 刘会平; 魏颖; 周继胜; 李冬兰; 马国永
Original assignee: Shandong Weifang Foton Mould Co Ltd
Current assignee: Shandong Weifang Foton Mould Co Ltd
Priority date: 2010-03-23
Filing date: 2010-03-23
Publication date: 2012-02-01
Anticipated expiration: 2030-03-23
Also published as: CN101807066A

Abstract

The invention discloses a trimming die entrance modulus machining method of a covering piece, comprising the following steps of: a CAM (Computer Aided Manufacturing) programming step: programming by using a moulding surface in the shape of a workpiece, and moving a cutting edge moulding surface at a distance relative to a machining coordinate system, wherein the length of the distance is the sum of entrance modulus and material thickness; a surface contour machining step: carrying out surface contour machining on the cutting edge moulding surface by using a ball cutter, wherein the size of the dimension of a programming cutter is equal to the sum of the diameter dimension of an actual machining cutter and two times of the entrance modulus when the programming cutter is specified; a program post-processing step: outputting an NC (Numerical Control) machining program through cutter point data; a program list filling step: marking a machining cutter according to the actual machining cutter; and an NC machining step: selecting a cutter specified by the program list to carry out machining during the machining of a production department. The invention has easy operation without rebuilding a three-dimensional model for the moulding surface of the working part of a mould, convenience, fastness, time saving and labor conservation.

Description

Trimming die entrance modulus machining method of covering piece

Technical field

The present invention relates to the trimming die entrance modulus machining method in a kind of car panel die field.

Background technology

Over past ten years; Car panel die obtains develop rapidly in China, is that the mould manufacture level of representative greatly improves with the full-sized car cladding member mold, and the car mould leans on the situation of import just to be broken entirely; Homemade mould substitutes the import mould has become trend, even the outlet that has.But make the automobile die manufacture level of China really arrive international most advanced level, also have very long road, need constantly bring forth new ideas, set up oneself core technology and knowledge base.

In repairing the manufacturing of punch die tool, since automobile panel shape more complicated, the common big rise and fall of trimming edge profile, mostly the trimming line of full-sized car covering blanking die is complicated three-dimensional curve, patrix cutting edge profile needs digital control processing.But because the profile of digital control processing is the profile of molding procedure part, as shown in Figure 1, the upper die and lower die matched moulds is during to bottom dead centre; Will exist into the not enough problem of modulus (λ) at oblique facade place; Along with the continuous increase of oblique facade and horizontal sextant angle, actual on oblique facade of processing back goes into modulus (λ) and will reduce gradually, when tiltedly facade rises steeply; As shown in Figure 2, herein go into modulus (λ) near " zero ".

In order to guarantee that traditional processing technology mainly contains following method into modulus (λ):

1, the mathematical model that goes up preface operation part is used in programming and digital control processing; Do not add and transform directly programming and processing; After profile processes; Counter blade shape of the mouth as one speaks face does not arrive design and welds with the position of mold work requirement in the modulus (λ) of going into of oblique facade, and shadow region as shown in Figure 3 is that repair welding is regional, is repaiied by pincers worker then and grinds cutting edge and profile.

Technological process: carry out CAM programming → NC processing → welding → pincers worker by operation part profile and repair and grind.

The method has directly been used the operation number of packages and has been learned model and programme and process; But shortcoming is very outstanding, and the modulus (λ) of going at cutting edge profile place adopts the method for afterwards remedying, and solves through repair welding; Of poor quality; And the cutting edge that processes damaged, need to increase pincers worker and repair and grind, influence intensity and attractive in appearance simultaneously.

2, along with CAD, the technological development of CAM; The particularly raising of cad technique level and applying in order to change the drawback that the welding cutting edge brings, is gone into the method that modulus (λ) adopts the modeling cutter spacing; Through CAD software the processing profile is rebulid three-dimensional model, this problem of solution.

Technological process: the operation part on the oblique facade is carried out three-dimensional modeling → carry out CAM programming → NC processing by operation part profile.

Though the method can solve and go into the modulus problem after the processing of oblique facade, shortcoming is to guarantee to lean on secondary modeling moulding to going into modulus, problem is solved become complicated; Personnel's technical ability is required to increase; Relatively waste time and energy, increase the workload of CAD moulding, when the profile more complicated; The CAD modeling will be wasted great effort and time, the mould development time lengthening mould development time.

Summary of the invention

Technical matters to be solved by this invention provides when a kind of ability is fine to satisfy oblique facade deburring going into the requirement of modulus, and operation easily, convenient and swift, time saving and energy saving trimming die entrance modulus machining method of covering piece.

For solving the problems of the technologies described above; Technical scheme of the present invention is: trimming die entrance modulus machining method of covering piece; May further comprise the steps: the CAM programming step; Use the programming of operation part shape profile, the cutting edge profile moved a segment distance relative to machining coordinate system, the size of distance be into modulus and material thick add and; Along face copying step, use ball cutter counter blade shape of the mouth as one speaks face to carry out along the face copying, when specifying the programming cutter, the size of the size of programming cutter equal actual process tool diameter dimension and twice go into adding of modulus and, carry out the design of job sequence then; The rearmounted treatment step of program is with the data output NC job sequence of point of a knife point; Fill in the procedures sheet step, the sign of process tool is pressed actual process tool sign; NC procedure of processing, workshop add selects for use the cutter of procedures sheet appointment to process man-hour.

Owing to adopted technique scheme; Trimming die entrance modulus machining method of covering piece may further comprise the steps: the CAM programming step, use the programming of operation part shape profile; The cutting edge profile is moved a segment distance relative to machining coordinate system, the size of distance be into modulus and material thick add and; Along face copying step, use ball cutter counter blade shape of the mouth as one speaks face to carry out along the face copying, when specifying the programming cutter, the size of the size of programming cutter equal actual process tool diameter dimension and twice go into adding of modulus and; The rearmounted treatment step of program is with the data output NC job sequence of point of a knife point; Fill in the procedures sheet step, the sign of process tool is pressed actual process tool sign; NC procedure of processing, workshop add selects for use the cutter of procedures sheet appointment to process man-hour; Need not rebulid three-dimensional model to the working portion of die profile, operation is convenient and swift, time saving and energy saving easily.

Description of drawings

Fig. 1 is a upper and lower mould matched moulds state reference map in the background technology;

Fig. 2 is upper and lower mould matched moulds state reference map when tiltedly facade rises steeply in the background technology;

Fig. 3 is that traditional handicraft solves going into modulus and can't arriving design and the schematic diagram that requires of mold work of oblique facade in the background technology;

Fig. 4 is the schematic diagram of the embodiment of the invention.

Embodiment

As shown in Figure 4, trimming die entrance modulus machining method of covering piece may further comprise the steps: the CAM programming step, the programming profile is an operation part profile, and the cutting edge profile is moved a segment distance relative to machining coordinate system, the size of distance be into modulus and material thick add and; Along face copying step; Use ball cutter counter blade shape of the mouth as one speaks face to carry out along the face copying; When specifying the programming cutter, the size of the size of programming cutter equal actual process tool diameter dimension and twice go into adding of modulus (λ) and, carry out the design of job sequence then; For example; If be designed into modulus λ=3mm; Tool diameter=process tool diameter+2 * 3 of then programming; If with Φ 50 ball cutter roughing, with Φ 30 ball cutter semi-finishings, with Φ 30 or Φ 20 ball cutter finishing, then corresponding programming tool diameter size should be: Φ 56, Φ 36, Φ 36 or Φ 26, as shown in the table:

The rearmounted treatment step of program is with the data output NC job sequence of point of a knife point, cutter follow procedure point of a knife cutter location track action during machine work; Fill in the procedures sheet step, the sign of process tool is pressed actual process tool sign; NC procedure of processing, workshop add selects for use the cutter of procedures sheet appointment to process man-hour, accomplishes actual profile processing.

Points for attention:

(1), the processing of profile need be adopted ball cutter processing mode;

(2), NC job sequence when design, programming tool diameter size equals the modulus of going into that actual process tool diameter dimension adds 2 times.

(3), procedures sheet indication process tool size must be the tool dimension of actual processing usefulness, the workshop adds the cutter of selecting the procedures sheet appointment man-hour for use.

(4), the output of NC routine data the time presses the output of point of a knife point data, digital control processing is carried out tool setting by point of a knife.

Claims

1. trimming die entrance modulus machining method of covering piece is characterized in that, may further comprise the steps:

The CAM programming step uses the programming of operation part shape profile, and the cutting edge profile is moved a segment distance relative to machining coordinate system, the size of distance be into modulus and material thick add and;

Along face copying step; Utilize CAM software, use ball cutter counter blade shape of the mouth as one speaks face to carry out, when specifying the programming cutter along the face copying; The size of diameter dimension of programming cutter equal actual process tool diameter dimension and twice go into adding of modulus and, carry out the design of job sequence then;

The rearmounted treatment step of program is with the data output NC job sequence of point of a knife point;

Fill in the procedures sheet step, the sign of process tool is pressed actual process tool sign;

NC procedure of processing, workshop add selects for use the cutter of procedures sheet appointment to process man-hour.