CN103419540A - Deformed-curved surface self-adaptive projection processing method based on path unit - Google Patents

Abstract

The invention belongs to the field of numerical control processing, in particular to a deformed-curved surface self-adaptive projection processing method based on a path unit. The method comprises the flowing steps: A, constructing the original curved surface shape of a projection curved surface; B, selecting measurement points on the projection curved surface, and measuring the measurement points one by one; C, according to measuring results, constructing a sampling curved surface; D, projecting processing path points onto the original curved surface and the sampling curved surface according to projection rules, and calculating deviation value of projection points of two curved surfaces; E, compensating the deviation value of each projection point to a projection processing path corresponding to the processing path points. According to the invention, try cutting processing is not required, adjustment to path can be performed, the operation is simple, the cost is low, the efficiency is high, and the processing effect is good.

Description

Deformation surface self adaptation projection processing method based on path unit

Technical field

The invention belongs to the digital control processing field, particularly a kind of deformation surface self adaptation projection processing method based on path unit.

Background technology

Projection processing is that facing tool path or the geometric figure (curve, word, point etc.) will produced projects to processing curve, generate the processing method of curved facet tool path locus, can complete the text engraving of piece surface, the curved surface carved pattern, carve geometrical pattern etc. on curved surface.In traditional technological process; be subject to the impact of the factors such as variations in temperature and Stress Release; can there be moderate finite deformation in some blanks in punching press, depanning or clamping process; for free form surface, these distortion are again that milli is irregular, carry out projection when needs and add man-hour on these curved surfaces; the impact of being out of shape; can there be the quality problems such as deep mixed in the product processed, some thin-wall parts particularly, and problem is just more obvious.

Existing solution is that product is carried out to trial cut processing, then the pathdepth adjustment is carried out in the place that can not meet the working depth requirement.This method is very high to technical staff's requirement on the one hand, must possess abundant processing experience, can judge accurately, fast adjustment amount and the method for adjustment of the machining path depth; On the other hand, the method working (machining) efficiency is low, and production cost is high, and can't guarantee processing effect, and yield rate is low, is difficult to realize batch production.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of deformation surface self adaptation projection processing method based on path unit is provided, does not need to carry out trial cut processing, can carry out route adjust, simple to operate, cost is low, efficiency is high, and processing effect is good.

In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions.

A kind of deformation surface self adaptation projection processing method based on path unit comprises the following steps:

A, according to the fabrication design requirement, build the original curve form of curved projection surfaces;

B, on curved projection surfaces, choose some as measurement point, and one by one to being measured on actual black skin;

C, according to measurement result, build the sampling curved surface of curved projection surfaces;

D, according to projection rule, machining path points is projected to respectively on the sampling curved surface built in the original curved surface that builds in steps A and step C, and the subpoint on the calculating sampling curved surface with respect to subpoint on original curved surface in the deviate of projecting direction;

E, the deviate of each subpoint is compensated to respectively in the projection machining path of corresponding machining path points.

Compared with prior art, beneficial effect of the present invention is: the present invention be take path unit as object, adopts the mode of adjusting the path spot projection degree of depth, has completed the self adaptation projection processing of deformation surface.Effectively solve the problems such as the processing existed in deformation surface projection processing is deep mixed, met the processing request that deformation surface projection processing is produced in enormous quantities, obtained better processing effect simultaneously, can complete the route adjust of moderate finite deformation amount workpiece; And be simple and easy to use, programming efficiency is high, effectively reduced production cost.

The accompanying drawing explanation

Fig. 1 is the flow chart of the inventive method.

Fig. 2 is the original curve form schematic diagram of embodiment of the present invention structure.

Fig. 3 is the schematic diagram of the embodiment of the present invention at the selected measurement point of original curved surface.

Fig. 4 is the position view of the selected measurement point of the part that provides of the embodiment of the present invention and actual spot of measurement.

Fig. 5 is the constructed sampling curved surface of the embodiment of the present invention and original curved surface cross sectional shape schematic diagram.

Fig. 6 is that the embodiment of the present invention is used for explaining that processing stand is to deviate computational methods schematic diagram after two curved surface projections.

Fig. 7 is the projection machining path schematic diagram before and after the compensation that provides of the embodiment of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing and the specific embodiment, the present invention is described in further detail.

In conjunction with shown in Fig. 1 to Fig. 7, the process that the inventive method is carried out Z-direction projection processing on the distortion disk body, comprise the following steps.

Step 101, according to the fabrication design requirement, build the original curve form of curved projection surfaces, as shown in Fig. 2 mean camber S.

Step 102 is chosen measurement point on curved projection surfaces, and actual black skin is measured one by one.

Fig. 3 has shown 81 measurement points selected on original curved surface S, and wherein, bottom surface has been chosen 19, and prism has been chosen 72.Fig. 4 mid point 1 to point 13 means is 13 measurement points on selected radial centre lines, puts 1 ' and means respectively to putting 13 ' true location point that corresponding measurement point is measured on black skin.

Step 103, according to measurement result, build the sampling curved surface of curved projection surfaces, as shown in Fig. 5 mean camber S '.

Step 104, by machining path points respectively Z-direction be projected to original curved surface S and sampling curved surface S ' is upper, and calculate the Z-direction deviate of subpoint on two curved surfaces.

Fig. 6 has explained that machining path points M is to the Z-direction deviate △ ε calculated after two face projections, it is the Z coordinate of the Z coordinate-original face subpoint of deviate △ ε=sampling curved surface projection point, sampling curved surface projection point is above original curved surface projection point the time, △ ε be on the occasion of, sampling curved surface projection point is below original curved surface projection point the time, and △ ε is negative value.

Step 105, compensate to the Z-direction deviate △ ε of each subpoint respectively in the projection machining path of corresponding machining path points, and △ ε moves on timing projection machining path points, and when △ ε is negative, the projection machining path points moves down.

Fig. 7 has shown compensation front and back projection machining path schematic diagram, and path L is the projection machining path that curved surface generates, and L ' is the actual processing projection path after adjusting.

Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention, all should be understood to fall into protection scope of the present invention.

Claims (1)

1. the deformation surface self adaptation projection processing method based on path unit, is characterized in that, comprises the steps:

A, according to the fabrication design requirement, build the original curve form of curved projection surfaces;

B, on curved projection surfaces, choose some as measurement point, and one by one to being measured on actual black skin;

C, according to measurement result, build the sampling curved surface of curved projection surfaces;

D, according to projection rule, machining path points is projected to respectively on the sampling curved surface built in the original curved surface that builds in steps A and step C, and the subpoint on the calculating sampling curved surface with respect to subpoint on original curved surface in the deviate of projecting direction;

E, the deviate of each subpoint is compensated to respectively in the projection machining path of corresponding machining path points.

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