CN105171083B

CN105171083B - Clip type bacterial type blade root milling cutter

Info

Publication number: CN105171083B
Application number: CN201510540441.5A
Authority: CN
Inventors: 王强; 刘文泽; 谢鸿; 周乐安; 贠庆芳; 张轶
Original assignee: DEC Dongfang Turbine Co Ltd
Current assignee: DEC Dongfang Turbine Co Ltd
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2017-08-04
Anticipated expiration: 2035-08-28
Also published as: CN105171083A

Abstract

The invention discloses a kind of clip type bacterial type blade root milling cutter, including bacterial type cutter hub and eight row's cutter grooves being arranged on cutter hub, wherein：Set that two being distributed on Central Symmetry, rake face crosses the blade that centers and anterior angle are 0 ° since the first row cutter groove end face；Two being distributed on Central Symmetry, that rake face crosses center, No. two blades that anterior angle is 0 ° are set in the secondth, four, six row's cutter grooves；No. three blades and No. four blades being distributed on Central Symmetry are provided with three, the five row's cutter grooves；Two are set in seven, the eight row's cutter grooves on Central Symmetry distribution, rake face mistake center, No. five blades that anterior angle is 0 °.The present invention is meeting complete machining molded line, and special working position can be able to reduce knife number on the premise of considering, the rigid of cutter hub is ensure that as far as possible, so guarantee is rigidly provided for the cutter in process, reduces the chatter mark that cutter is produced due to vibration.

Description

Clip type bacterial type blade root milling cutter

Technical field

The invention belongs to the processing technique field of turbine blade bacterial type blade root, and in particular to a kind of clip type bacterial type blade root Milling cutter.

Background technology

During production turbine blade, in order to install steam turbine blade root, bacterial type groove, the bacterium are formed in the outer ring of rotor Type blade root blade is arranged on the race of outer ring and forms a grade blade, and the bacterial type blade root milling cutter is due to using side loader clip knot Structure, therefore the use cost of cutter substantially reduces, but be due to that blade shapes are matched according to bacterial type molded line, therefore city can not be used Interchangeable blade on field, the manufacturing cost of such blade increased.

The content of the invention

In order to overcome the shortcoming of prior art, the invention provides a kind of clip type bacterial type blade root milling cutter.

The technical solution adopted in the present invention is：A kind of clip type bacterial type blade root milling cutter, including bacterial type cutter hub and be arranged on Eight row's cutter grooves on cutter hub, wherein：Two be distributed on Central Symmetry, preceding knives are set since the first row cutter groove end face Mian Junguo centers and anterior angle are 0 ° of a blade；Two be distributed on Central Symmetry, rake faces are set in second row cutter groove Cross center, anterior angle be 0 ° and with No. two blades that a blade angle is 90 °；It is provided with 3rd row's cutter groove on center It is symmetrical and with staggered No. three blades of second row blade and No. four blades；The arrangement and setting and second of 4th row's cutter groove Arrange cutter groove identical and staggered with the 3rd row's cutter groove；The arrangement and setting of 5th row's cutter groove are identical with the 3rd row's cutter groove, and with Four row's cutter grooves are staggered；The arrangement of 6th row's cutter groove and set identical with the 4th row's cutter groove, and stagger row with the 5th row's cutter groove Row；In 7th row's cutter groove set two on Central Symmetry be distributed, rake face cross center, anterior angle be 0 ° and with the 6th row's knife The blade angle of groove is 20 ° of No. five blades；The arrangement of 8th row's cutter groove and set identical with the 7th row's cutter groove, and with the 7th row Cutter groove is staggered, and two row's blade angles are 20 °.

Compared with prior art, the positive effect of the present invention is：Complete machining molded line is being met, and can be to special processing Position is able to reduce knife number on the premise of considering, the rigid of cutter hub is ensure that as far as possible, so in process Cutter rigidly provide ensure, reduce cutter due to vibration produce chatter mark.The present invention can not only realize turbine blade leaf Effective and stable processing of root, moreover it is possible to greatly reduce the vibration produced in working angles and noise, and workpiece cutting surface is thick Rugosity is improved.Add present invention can apply to the processing of steam turbine bacterial type blade root and similar to other workpiece of the shape Work.

Brief description of the drawings

Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：

Fig. 1 is structural representation of the invention；

Fig. 2 is Fig. 1 cutter end face A direction views；

Fig. 3 is the positional structure schematic diagram of a blade and No. four blades；

Fig. 4 is the positional structure schematic diagram of No. three blades and No. five blades；

Fig. 5 is the positional structure schematic diagram of No. two blades.

Embodiment

A kind of clip type bacterial type blade root milling cutter, as shown in Figures 1 to 5, including：Number blade 1, No. two blades 2, No. three knives Piece 3, No. four blades 4 and No. 5 blades 5 etc., specific set location and angle of the blade in cutter hub are as follows：

Two blades 1 are set in first row insert groove, and on Central Symmetry distribution, blade molded line is derived from bacterial type blade root Theoretical profile molded line, a blade rake face crosses center, and 0 ° of anterior angle, blade is end face blade, for processing end face；

Two No. two blades 2 are set in second row cutter groove, and on Central Symmetry distribution, blade molded line is derived from bacterial type blade root Theoretical profile molded line, with 90 ° of a blade angle, 0 ° of anterior angle, rake face crosses center；

No. three blades 3 and No. four blades 4 are set in the 3rd row's cutter groove, on Central Symmetry distribution, and with second row blade Staggered, the blade molded line of No. three blades and No. four blades is derived from the theoretical profile molded line of bacterial type blade root；

The arrangement and setting of 4th row's cutter groove are identical with second row cutter groove, and staggered with the 3rd row's cutter groove；

The arrangement and setting of 5th row's cutter groove are identical with the 3rd row's cutter groove and staggered with four row's cutter grooves；

The arrangement and setting of 6th row's cutter groove are identical with the 4th row's cutter groove and staggered with the 5th row's cutter groove；

It is arranged on No. two blades 2 of second, four, six row's cutter grooves to be respectively located on first, second and third tooth, is respectively used to processing The end face of first, second and third tooth, cylindrical, pitch face and part inner circle；No. two blades of the second tooth and No. two blades of the first tooth are closed In 40 ° of central rotation；No. two blades of the 3rd tooth and No. two blades of the second tooth are on 15 ° of central rotation；No. two blades are each Individual teeth portion is two panels, it is therefore an objective on the premise of ensureing stock-removing efficiency, improves the machining accuracy in pitch face, the size in each face of pitch Required precision is very high.

It is arranged on No. three blades 3 of the 3rd row and the 5th row's cutter groove to be respectively located on second and third tooth, is respectively used to processing the 2nd, the big inclined-plane of three teeth, part inner circle and cylindrical；No. three blades of the second tooth and 20 ° of No. two blade angles of the first tooth, before it 0 ° of angle, rake face crosses center, No. three blades of the 3rd tooth and 15 ° of No. three blade angles of the second tooth, 0 ° of its anterior angle, rake face mistake Center；

It is arranged on No. four blades 4 of the 3rd row and the 5th row's cutter groove to be respectively located on second and third tooth, is respectively used to processing the 2nd, the big inclined-plane in the part of three teeth and part inner circle；No. four blades are the same with No. three blades, are distributed on second and third tooth, same It is respectively a piece of on tooth, and each with No. three blades on same tooth on Central Symmetry；

3rd, No. four blades can keep vertical dress blade in the case where trying one's best less, ensure that each inner circle bottom has two Piece blade participates in cutting, improves cutting effect and processing efficiency at each interior round bottom footpath.

Two No. five blades 5 are set in the 7th row's cutter groove, and on Central Symmetry distribution, blade is square, for processing leaf The big footpath straight line position of root, each blade hook angle is 0 °, and rake face crosses center, 20 ° of the blade angle with the 6th row's cutter groove；

The blade that 8th row's cutter groove is set is identical with the 7th row's cutter groove, and staggers with the 7th row's cutter groove, two row's blade angles 20°.No. five blades can ensure the processing efficiency at blade root straight line position.

Above-mentioned each blade is mutually overlapped, and final molded line is formed after revolution, and whole blade shapes are in bacterial type, nonstandard blade molded line Designed according to blade root bacterial type shape, complete blade-root molded line is formed after nonstandard blade side set overlap joint.

Each described blade hook angle is 0 °, and 8 ° of relief angle, each cutting tip protrudes 1mm height to cutter hub circumference.

The milling cutter is made up of standard insert and special-shaped molded line blade, and molded line blade is arranged in each molded line portion with single even numbers amount Position forms molded line, and tail end straight line position is arranged with standard side's blade side set, and blade is in spiral distribution as viewed from milling cutter end face.

Rectangle bite film trap is placed in each protruding parts with pitch groove opposite.Rectangle cutting tip and square cutting Blade is placed in stepped portions protruding parts, and is axially distributed with zigzag.Circumferential blade and end blade are placed in protuberance Position and stepped portions.Blade axial direction face angle degree and sagittal plane angle point to afterbody-end towards from the front of cutter main portion Side gradually increases.

Claims

1. a kind of clip type bacterial type blade root milling cutter, it is characterised in that：Including bacterial type cutter hub and eight row's cutter grooves being arranged on cutter hub, Wherein：Two being distributed on Central Symmetry, rake face mistake center and anterior angles are set since the first row cutter groove end face For 0 ° of a blade；In second row cutter groove set two on Central Symmetry be distributed, rake face cross center, anterior angle be 0 ° and with No. two blades that a blade angle is 90 °；It is provided with and is distributed and with second on Central Symmetry in 3rd row's cutter groove Arrange staggered No. three blades of blade and No. four blades；The arrangement and setting of 4th row's cutter groove are identical with second row cutter groove, and with 3rd row's cutter groove is staggered；The arrangement and setting of 5th row's cutter groove are identical with the 3rd row's cutter groove, and stagger with the 4th row's cutter groove Arrangement；The arrangement and setting of 6th row's cutter groove are identical with the 4th row's cutter groove and staggered with the 5th row's cutter groove；7th row's cutter groove It is middle set two on Central Symmetry be distributed, rake face cross center, anterior angle be 0 ° and with the blade angle of the 6th row's cutter groove For 20 ° of No. five blades；The arrangement of 8th row's cutter groove and set identical with the 7th row's cutter groove, and stagger row with the 7th row's cutter groove Row, two row's blade angles are 20 °.

2. clip type bacterial type blade root milling cutter according to claim 1, it is characterised in that：The molded line of one to No. four blade The theoretical profile molded line of bacterial type blade root is derived from, No. five blades are square.

3. clip type bacterial type blade root milling cutter according to claim 1, it is characterised in that：It is arranged on second, four, six row's cutter grooves No. two blades be located at respectively on first, second and third tooth, No. two blades of the second tooth and No. two blades of the first tooth are on center rotation Turn 40 °；No. two blades of the 3rd tooth and No. two blades of the second tooth are on 15 ° of central rotation.

4. clip type bacterial type blade root milling cutter according to claim 1, it is characterised in that：It is arranged on the 3rd row and the 5th row's knife No. three blades of groove are located on second and third tooth respectively；No. three blades of the second tooth and 20 ° of No. two blade angles of the first tooth, its 0 ° of anterior angle, rake face crosses center, No. three blades of the 3rd tooth and 15 ° of No. three blade angles of the second tooth, 0 ° of its anterior angle, rake face Cross center.

5. clip type bacterial type blade root milling cutter according to claim 1, it is characterised in that：It is arranged on the 3rd row and the 5th row's knife No. four blades of groove are located on second and third tooth respectively.

6. clip type bacterial type blade root milling cutter according to claim 1, it is characterised in that：Each described blade hook angle is 0 °, 8 ° of relief angle, each cutting tip protrudes 1mm height to cutter hub circumference.