CN105252058A - Five-shaft milling processing method of turbine impeller - Google Patents

Abstract

A five-shaft milling processing method of a turbine impeller comprises the following steps of impeller rough machining, blade point machining, blade root fillet machining, fine machining for runners among blades, and the like. The five-shaft milling processing method is high in processing efficiency and low in cutter losses.

Description

A kind of five-axis milling processing method of turbo wheel

Technical field

The present invention relates to a kind of processing method of turbo wheel, especially a kind of five-axis milling processing method of turbo wheel.

Background technology

Turbo wheel generally has two kinds of manufacture methods: casting or milling.For the manufacturer that few kind is produced in enormous quantities, because the cost per unit of casting is lower than milling cost, be thus suitable in such cases adopting casting technique.But adopting casting technique to be also with and to serve defect, the physical characteristic of such as founding materials is uneven, discontinuous, and the geometry between two foundry goods is inconsistent etc.Therefore, the way processing of increasing turbomachinery manufacturer conversion digital control processing.There is the turbo wheel of complicated shape, need to process with five axle milling machines, when the interlobate runner of roughing, use five-axle linkage, cutter needs with ball head knife, and cutter again can not be too large by impeller root fillet restriction diameter, so efficiency is low especially, cutter loss is serious.

Summary of the invention

The object of the invention is to overcome the problem that the impeller roughing inefficiency, the cutter loss that exist in the five-axis milling processing method of turbo wheel in prior art are serious, the five-axis milling processing method of the turbo wheel that a kind of working (machining) efficiency is high, cutter loss is little is provided.

For realizing above object, technical solution of the present invention is: a kind of five-axis milling processing method of turbo wheel, comprise the steps such as impeller roughing, the processing of blade point, the processing of root of blade fillet, interlobate runner fine finishining, it is characterized in that: described impeller roughing comprises the following steps:

1), X, Y, Z three-shaft linkage, rotating shaft AB diaxon does not link, and uses round nose tool sharpening to go out interlobate runner;

2), be used alone rotating shaft A axle, utilize it repeatedly to swing impeller angle, continue to use round nose cutter to carry out roughing to interlobate runner;

3), be used alone rotating shaft B axle, utilize it repeatedly to swing impeller angle, continue to use round nose cutter to carry out roughing to interlobate runner, until preliminary by Impeller Machining to the molded line meeting design;

4) X, Y, Z, A, B five-axle linkage, the impeller using ball-end mill to obtain step 3) is for further processing, completes the rough machined step of impeller.

Beneficial effect of the present invention is:

Time in the present invention to same Impeller Machining, the round nose cutter that diameter is larger can be selected as required, utilize A, B axle of the spinfunction of software and lathe repeatedly to swing impeller angle, the molded line meeting impeller can be machined to successively.The program of such works post processing is first X, Y, Z three-shaft linkage, two rotating shafts A, B do not participate in interlock, after be used alone rotating shaft A, B and carry out again dead axle and carry out roughing, thick way is opened owing to adopting repeatedly dead axle, and use the better round nose cutter of high-speed cutting performance, working (machining) efficiency increases substantially, and tool wear is less.

Detailed description of the invention

Below in conjunction with detailed description of the invention, this practicality invention is described in further detail:

A five-axis milling processing method for turbo wheel, comprises the steps such as impeller roughing, the processing of blade point, the processing of root of blade fillet, interlobate runner fine finishining, it is characterized in that: described impeller roughing comprises the following steps:

1), X, Y, Z three-shaft linkage, rotating shaft AB diaxon does not link, and uses round nose tool sharpening to go out interlobate runner;

2), be used alone rotating shaft A axle, utilize it repeatedly to swing impeller angle, continue to use round nose cutter to carry out roughing to interlobate runner;

3), be used alone rotating shaft B axle, utilize it repeatedly to swing impeller angle, continue to use round nose cutter to carry out roughing to interlobate runner, until preliminary by Impeller Machining to the molded line meeting design;

4) X, Y, Z, A, B five-axle linkage, the impeller using ball-end mill to obtain step 3) is for further processing, completes the rough machined step of impeller.

Ball cutter, is generally monolithic construction, and the size of new cutter is accurate, can process the sunk area that some are narrow and small, but no matter how high rotating speed is, the central point of ball cutter is always static, be not milling when this part and absorption surface, but in grinding, this is also the reason that ball cutter easily weares and teares.Round nose cutter is generally embedded structure, and more allowing blade replacement all can make tool dimension generation slight change at every turn, there is not static cutting edge, and the wearing and tearing of blade are also less, and cutter spacing also can strengthen.But because cutter front end exists blind area, can process not in place at some sunk areas.The really current High-speed machining of ball cutter uses upper suitable frequent, but it is also inapplicable in some viewpoint, when you use ball cutter, cutting linear velocity can have because of the difference of contact point to be changed always, the life-span of relative cutter also can have a greatly reduced quality, and ball cutter is useful in clout processing.Round nose cutter itself is be best suited in High-speed machining, because it has the stability of characteristic and the cutting linear velocity not easily burst apart in corner.

Time in the present invention to same Impeller Machining, the round nose cutter that diameter is larger can be selected as required, utilize A, B axle of the spinfunction of software and lathe repeatedly to swing impeller angle, the molded line meeting impeller can be machined to successively.The program of such works post processing is first X, Y, Z three-shaft linkage, two rotating shafts A, B do not participate in interlock, after be used alone rotating shaft A, B and carry out again dead axle and carry out roughing, thick way is opened owing to adopting repeatedly dead axle, and use the better round nose cutter of high-speed cutting performance, working (machining) efficiency increases substantially, and tool wear is less.

Through test, produce general impeller, use traditional handicraft processing, cutter uses ball head knife (8mm), and roughing all completes 22H*13=186H consuming time; Blade loss 44.

Use processing method of the present invention, in step one two or three, cutter all uses round nose cutter (24mm) to carry out roughing to interlobate runner, during step 4 five-axle linkage, ball head knife (8mm) is then used to process, utilize A, B axle of lathe repeatedly to swing impeller angle, the molded line meeting impeller can be machined to successively.A groove roughing completes and only needs 3H, blade abrasion 1/3; Roughing all completes and consuming timely only needs 3H*13=39H, and blade consumes 4.Impeller roughing is compared with traditional handicraft after tool selection optimization through the optimization of processing works, and whole roughing process time decreases 79%, and processing cost decreases 65%, achieves obviously effect of optimization.Working (machining) efficiency of the present invention is high, cutter loss is little.

Claims (1)

1. a five-axis milling processing method for turbo wheel, comprises the steps such as impeller roughing, the processing of blade point, the processing of root of blade fillet, interlobate runner fine finishining, it is characterized in that: described impeller roughing comprises the following steps:

1), X, Y, Z three-shaft linkage, rotating shaft AB diaxon does not link, and uses round nose tool sharpening to go out interlobate runner;

2), be used alone rotating shaft A axle, utilize it repeatedly to swing impeller angle, continue to use round nose cutter to carry out roughing to interlobate runner;

3), be used alone rotating shaft B axle, utilize it repeatedly to swing impeller angle, continue to use round nose cutter to carry out roughing to interlobate runner, until preliminary by Impeller Machining to the molded line meeting design;

4) X, Y, Z, A, B five-axle linkage, the impeller using ball-end mill to obtain step 3) is for further processing, completes the rough machined step of impeller.