CN1967422A - A method for machining curve surface of workpiece by numerical control machine - Google Patents

Abstract

The invention belongs to the mechanical manufacturing category, to process the workpiece curved face by the numerical control machine. It is mainly using the measurement head to collect each point's coordination data of the workpiece standard model curved face, and according to the collected data, using cutter directly to the workpiece for processing, to obtain the workpiece the same as the standard model curved face, and when the measurement head moving, selecting one axis as the initiative axis, with the rest as driven axis, and with the oriented pallet positioning moving with the initiative axis, cutting the measurement head, the workpiece, and the oriented pallet at the same time, while obtaining each point's coordination data when the workpiece only having one initiative axis. The invention is simple and convenient, the results being satisfactory, effectively reducing the existing curved face machining errors, such as measuring machine error, procedural conversion error and numerical control machine error, and the workpiece curved face having high precision.

Description

A kind of method with the numerically-controlled machine machining curve surface of workpiece

Technical field

The invention belongs to field of mechanical manufacture technology, specifically is a kind of method with the numerically-controlled machine machining curve surface of workpiece.

Background technology

In mechanical processing industry, there is the part that much has complicated irregular curved surface to need processing, the processing of these parts often all has very high accuracy requirement, and material much all is a difficult-to-machine material, as jet blade, turbine blade, marine propeller etc., the curve form of these parts is difficult to describe with mathematical formulae, it makes the general model of determining earlier, on measuring machine, measure its curve form, again measurement result is converted to be programmed on the corresponding numerically-controlled machine and process, because the measuring machine error is arranged, program conversion error and Numerical Control Machine Tool Machining Error exist, the surface machining accuracy of part does not often reach requirement, causes scrapping of product.The application number that I apply for is that a kind of method with the numerically-controlled machine processing curve of 200610154479.X discloses a kind of method with numerically-controlled machine measurement and processed complex curved surface, this method is because of being provided with two motorized shaft, all the other are driven shaft, but in the lathe of interlock control more than 4 and 4, driven shaft will be for more than 2, this just means that measuring head has two above degree of freedom, so just be difficult to control with the movement locus of said method measuring head when specifically measuring.

Summary of the invention

The objective of the invention is deficiency at above-mentioned technology, a kind of method with the numerically-controlled machine machining curve surface of workpiece is disclosed, special in the linkage numerical control machine more than 4 and 4, can effectively overcome measuring machine error, program conversion error, reduce Numerical Control Machine Tool Machining Error, and control workpiece accuracy height satisfactory for result, that process.

Technical scheme of the present invention is as follows:

A kind of method of the present invention with the numerically-controlled machine machining curve surface of workpiece, it is characterized in that: setting an axle is main drive shaft, all the other axles are driven shaft, main drive shaft is by the digital control system controlled motion, driven shaft removes gear train, the moving guide rail of linear axis can be moved freely, and the moving guide rail of turning axle can freely rotate; Adorn a guiding supporting plate on main drive shaft, to be processed of side view and workpiece are identical substantially, and length is greater than Workpiece length, and the supporting plate that leads can move with main drive shaft, and the direction of motion of its plane and main drive shaft is not parallel; The master pattern of the workpiece of need processing is contained on the numerically-controlled machine, and measuring head is loaded onto in the tool position, and it is just the same that the cutting edge of the size of measuring head, shape and cutter rotates formed solid of revolution; When main drive shaft moved on a position, the guiding blade position was fixing thereupon, and the traverse measurement head makes measuring head and workpiece, guiding supporting plate while tangent; Applying an external force makes measuring head move along workpiece, grating of adorning on each driven shaft or scrambler will reflect the relevant position of each driven shaft, each the axial coordinate data when being noted measuring head that main drive shaft is fixed on a certain position and moved by the Survey Software of numerically-controlled machine; Mobile main drive shaft equal to cut the distance of spacing and fixedly the duplicate measurements head in each coordinate data of new position, by under the workpiece moving recording each in the coordinate data of each point and by the Survey Software record, measured fully until whole need processing curve; Pull down master pattern and measuring head, load onto workpiece and cutter respectively, all driven shafts are loaded onto gear train, and the coordinate data of the measuring head each point of being noted by Survey Software by numerically-controlled machine is processed workpiece with cutter, can process the workpiece consistent with master pattern.

The present invention is owing to gather the coordinate data of Workpiece standard model curved surface each point by measuring head, directly workpiece is processed with cutter according to image data again, obtain the workpiece consistent with the master pattern curved surface, in the moving process of measuring head, selected axle is a main drive shaft, all the other are driven shaft, location by the guiding supporting plate that can move with main drive shaft, measuring head and workpiece, guiding supporting plate is simultaneously tangent, thus make workpiece under the condition of having only a main drive shaft, obtain the coordinate data of each point; The present invention is simple and convenient, and is satisfactory for result, effectively reduced measuring machine error, program conversion error and Numerical Control Machine Tool Machining Error in the existing curved surface part processing, the curve surface of workpiece precision height of processing.

Description of drawings

Fig. 1 is workpiece of the present invention, measuring head, guiding blade position graph of a relation.

Fig. 2 is the upward view of Fig. 1.

Embodiment

The concrete job operation of the present invention is: setting an axle is main drive shaft, and all the other axles are driven shaft, and main drive shaft is by the digital control system controlled motion, and driven shaft removes gear train, and the moving guide rail of linear axis can be moved freely, and the moving guide rail of turning axle can freely rotate; Adorn a guiding supporting plate on main drive shaft, to be processed of side view and workpiece are identical substantially, and length is greater than Workpiece length, and the supporting plate that leads can move with main drive shaft, and the direction of motion of its plane and main drive shaft is not parallel; The master pattern of the workpiece of need processing is contained on the numerically-controlled machine, and measuring head is loaded onto in the tool position, and it is just the same that the cutting edge of the size of measuring head, shape and cutter rotates formed solid of revolution; When main drive shaft moved on a position, as shown in Figure 1, 2, guiding supporting plate 1 position was fixing thereupon, and traverse measurement 3 makes measuring head 3 and workpiece 2, guiding supporting plate 1 simultaneously tangent; Applying an external force makes measuring head 3 move along workpiece 2, grating of adorning on each driven shaft or scrambler will reflect the relevant position of each driven shaft, each the axial coordinate data when being noted measuring head that main drive shaft is fixed on a certain position and moved by the Survey Software of numerically-controlled machine; Mobile main drive shaft equal to cut the distance of spacing and fixedly the duplicate measurements head in each coordinate data of new position, by under the workpiece moving recording each in the coordinate data of each point and by the Survey Software record, measured fully until whole need processing curve; Pull down master pattern and measuring head, load onto workpiece and cutter respectively, all driven shafts are loaded onto gear train, and the coordinate data of the measuring head each point of being noted by Survey Software by numerically-controlled machine is processed workpiece with cutter, can process the workpiece consistent with master pattern.

Numerically-controlled machine of the present invention must be the control of full cut-off ring.

In Fig. 1, the diameter of the connecting link 4 of measuring head of the present invention must be greater than the diameter of cutter processing with knife bar, because the measuring head connecting link is when interfering with workpiece, turning axle can be adjusted angle automatically, but measuring head connecting link and workpiece can come in contact, the coordinate data of in reality processing, measuring according to big measuring head connecting link, knife bar and workpiece just can not take place when being changed to less knife bar interfere, must consider the workpiece blank surplus of measured workpiece and measuring head connecting link contact site when determining the difference of connecting link diameter and knife bar diameter.

Claims (2)

1, setting an axle is main drive shaft, and all the other axles are driven shaft, and main drive shaft is by the digital control system controlled motion, and driven shaft removes gear train, and the moving guide rail of linear axis can be moved freely, and the moving guide rail of turning axle can freely rotate; Adorn a guiding supporting plate on main drive shaft, to be processed of side view and workpiece are identical substantially, and length is greater than Workpiece length, and the supporting plate that leads can move with main drive shaft, and the direction of motion of its plane and main drive shaft is not parallel; The master pattern of the workpiece of need processing is contained on the numerically-controlled machine, and measuring head is loaded onto in the tool position, and it is just the same that the cutting edge of the size of measuring head, shape and cutter rotates formed solid of revolution; When main drive shaft moved on a position, the guiding blade position was fixing thereupon, and the traverse measurement head makes measuring head and workpiece, guiding supporting plate while tangent; Applying an external force makes measuring head move along workpiece, grating of adorning on each driven shaft or scrambler will reflect the relevant position of each driven shaft, each the axial coordinate data when being noted measuring head that main drive shaft is fixed on a certain position and moved by the Survey Software of numerically-controlled machine; Mobile main drive shaft equal to cut the distance of spacing and fixedly the duplicate measurements head in each coordinate data of new position, by under the workpiece moving recording each in the coordinate data of each point and by the Survey Software record, measured fully until whole need processing curve; Pull down master pattern and measuring head, load onto workpiece and cutter respectively, all driven shafts are loaded onto gear train, and the coordinate data of the measuring head each point of being noted by Survey Software by numerically-controlled machine is processed workpiece with cutter, can process the workpiece consistent with master pattern.

2, the method with the numerically-controlled machine machining curve surface of workpiece according to claim 1 is characterized in that: numerically-controlled machine must be the control of full cut-off ring.

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