CN102866664A

CN102866664A - Numerical-control machining method for parts with rotation center structures

Info

Publication number: CN102866664A
Application number: CN201210356211XA
Authority: CN
Inventors: 车国栋
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2012-09-21
Filing date: 2012-09-21
Publication date: 2013-01-09

Abstract

The invention discloses a numerical-control machining method for parts with rotation center structures by the aid of a horizontal rotary platform which is a fourth shaft. A machining coordinate system consists of a reference plane of a part, the rotation center of the part and an abutted surface of the part with the horizontal rotary platform which is the fourth shaft, and the part is machined in a numerical-control programmed manner according to a machined position of the part. The numerical-control machining method has the obvious advantages in the aspects of improving machining quality and machining efficiency and reducing machining cost.

Description

To having the numerical-control processing method of rotation center constitutional detail

Technical field

The present invention relates to the CNC processing technology field, particularly use the 4th axle horizontal revolving platform Numeric Control Technology about the airplane parts with rotation center structure.

Background technology

Part with rotation center structure is a kind of typical design of part in the aircaft configuration, especially is common in all kinds of joint parts, and material is the unmanageable titanium alloy material of many employings also.Part with rotation center structure is generally multistation seal groove cavity configuration, and the complex structure dimensional accuracy is high.Generally by titanium alloy forging is formed through digital control processing, present job operation generally all adopts vertical five number of coordinates control milling machines to process to this type of part, and this is determined by its design feature and process complexity.But there is at present such problem, on the one hand, adopt vertical five number of coordinates control milling machines to add and often in the part process, need multiple clamping man-hour, produce the multiple clamping error, cause unstable product quality, on the other hand, because spindle head of lathe need to be put certain angle, the length-diameter ratio of cutter is generally larger, and the part working (machining) efficiency is lower.Simultaneously, if beam-like part only is limited to vertical five number of coordinates control milling machines, also greatly restrict the range of work of such part, caused the waste of resource.Therefore adopt for the part with rotation center structure that traditional five-shaft numerical control manufacturing procedure is long, processing stations is many, auxiliary time of production is more, the part working (machining) efficiency is lower, and the waste of resource is serious.

Summary of the invention

The object of the invention is to disclose a kind of numerical-control processing method that adopts the 4th axle horizontal revolving platform to having the rotation center constitutional detail.The method provides new approaches for the processing that has the rotation center constitutional detail on the aircraft, realizes the high-efficiency and precision processing on Technique of Three Axis CNC Machines.

A kind of to having the numerical-control processing method of rotation center constitutional detail, take the 4th axle of Technique of Three Axis CNC Machines as processing platform, it is characterized in that: 1) determine the rotation center of part, choose the part rotation center as the initial point of machining coordinate system; 2) plane choosing part as with the binding face of four axle horizontal revolving platforms; 3) choose on the part another plane as reference plane; 4) determine the different processing stations state of part; The spatial direction of part reference plane calculates the spatial direction of the reference plane under other different processing stations states and the anglec of rotation of the four axis platform zero degree position of having set as the zero degree position of four axle horizontal revolving platforms when 5) setting the first processing stations; 6) with the machining coordinate system of the binding face constituent part of the rotation center of the reference plane of part, part and part and four axle horizontal revolving platforms, according to the processing stations of part, carry out the numerical control journey and compile processing parts.

Beneficial effect of the present invention is, five coordinate numerical control processing modes of the routine with rotation center constitutional detail have been overcome, and the digital control processing mode of selection three-dimensional lathe the 4th axle horizontal revolving platform is improving crudy, working (machining) efficiency, and the aspect that cuts down finished cost has positive effect.

Below in conjunction with the embodiment accompanying drawing this application is described in further detail.

Description of drawings

Fig. 1 design of part schematic diagram

Fig. 2 part uses the 4th axle horizontal revolving platform the first processing stations schematic diagram

Fig. 3 part uses the 4th axle horizontal revolving platform the second processing stations schematic diagram

Fig. 4 part uses the 4th axle horizontal revolving platform the 3rd processing stations schematic diagram

Number description: 1 part, center, 2 Φ 50H7 hole, 3 register pins, 4 four axle horizontal revolving platforms, 5 binding faces, 6 reference planes, 7 pressing plates, 8 mark grooves, 9 cutters

Embodiment

The present embodiment is for the processing that has typical rotation center constitutional detail 1 on certain aircraft, the part noumenon material is the TC21 difficult-to-machine material, there is U-shaped groove on the structure, if use five axle equipment processing parts 1, crudy is poor, efficient is low, cost is large, and the 4th axle of employing Technique of Three Axis CNC Machines is the processing platform processing parts, can avoid above problem fully.The method is specific as follows:

1) center, Φ 50H7 hole 2 of determining on the part 1 is the design of part rotation center, by analysis center, Φ 50H7 hole 2 can be placed as with the center of four axle horizontal revolving platforms 4 concentric, so the initial point that with center, Φ 50H7 hole as machining coordinate is; Use register pin 3, part is positioned on the four axle horizontal revolving platforms 4;

2) choose the bottom sides conduct of part and the binding face 5 of four axis platform;

3) choose part screech owl sheet side as the reference field 6 of part processing;

4) determine three processing stations for the U-shaped seal groove structure of part, the first station is used for the bottom of the U-shaped groove of processing parts, as shown in Figure 2; The second station is processed the left part of U-shaped groove, as shown in Figure 3; The 3rd station is processed the right side part of U-shaped groove, as shown in Figure 4.

The spatial direction of reference field 6 is as the zero degree position of four axle horizontal revolving platforms when 5) setting part the first station, (mark groove 8 is used to indicate the spatial direction of reference field under each processing stations state of part, as shown in Figure 2, the position of this tense marker groove 8 is the zero degree position of four axle horizontal revolving platforms of setting); The anglec of rotation that calculates the four axis platform zero degree position of the spatial direction of reference plane of part the second station and setting is the A degree, (the as shown in Figure 3 angle of the zero degree position of the position of mark groove 8 this moment and four axle horizontal revolving platforms), the anglec of rotation of the four axis platform zero degree position of the spatial direction of the reference plane of part the 3rd station and setting is the B degree.(the as shown in Figure 4 angle of the zero degree position of the position of mark groove 8 this moment and four axle horizontal revolving platforms)

6) set out the clamped position of pressing plate 7, avoid interfering process, and guarantee enough clamping forces;

7) machining coordinate with the above-mentioned part reference field 6 of choosing, center 2, Φ 50H7 hole and binding face 5 common constituent parts is, according to three different stations determining, carrying out the numerical control journey compiles, part in process cutter 9 axially remain the three-axis machining form, process thus the U-shaped groove of part.

The present invention is in whole NC Machining Process, part 1 is in process under the clamped one time location all the time, do not need to interrupt NC Machining Process and switch the compression position, only need to rotate the 4th axle horizontal revolving platform 4, three processing stations of conversion, avoid the secondary clamping error, realized the high-efficiency and precision processing of this type of part on Technique of Three Axis CNC Machines.

Claims

1. one kind to having the numerical-control processing method of rotation center constitutional detail, take the 4th axle of Technique of Three Axis CNC Machines as processing platform, it is characterized in that: 1) determine the rotation center of part, choose the part rotation center as the initial point of machining coordinate system; 2) plane choosing part as with the binding face of four axle horizontal revolving platforms; 3) choose on the part another plane as reference plane; 4) determine the different processing stations state of part; The spatial direction of part reference plane calculates the spatial direction of the reference plane under other different processing stations states and the anglec of rotation of the four axis platform zero degree position of having set as the zero degree position of four axle horizontal revolving platforms when 5) setting the first processing stations; 6) with the machining coordinate system of the binding face constituent part of the rotation center of the reference plane of part, part and part and four axle horizontal revolving platforms, according to the processing stations of part, carry out the numerical control journey and compile processing parts.