CN103071853A - Broaching method and special tool for high-accuracy small-sized mortises - Google Patents
Broaching method and special tool for high-accuracy small-sized mortises Download PDFInfo
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- CN103071853A CN103071853A CN2012103638176A CN201210363817A CN103071853A CN 103071853 A CN103071853 A CN 103071853A CN 2012103638176 A CN2012103638176 A CN 2012103638176A CN 201210363817 A CN201210363817 A CN 201210363817A CN 103071853 A CN103071853 A CN 103071853A
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Abstract
The invention discloses a broaching method and a special tool for high-accuracy small-sized mortises. A special broaching tool is used for machining a to-be-machined workpiece. The structure of the special broaching tool meets the requirement that straight chamfers or/and round chamfers capable of participating in broaching are arranged on tooth crests of the broaching tool. The broaching method for the high-accuracy small-sized mortise meets the requirements that a broaching machining allowance elimination mode comprises the step of machining the workpiece by using main blades on the tooth crests of the broaching tools or/and the chamfer parts of the broaching tools, and the chamfer parts of the broaching tool are the straight chamfers or/and the round chamfers on the two sides of blades on the tooth crests; and totally 11 broaching tools are formed into a complete set, and are sequentially used for machining all the contour shapes of the mortises. The method and the special tool are mainly applied to the broaching machining of mortises of core parts of aero-engines and gas turbines such as turbine disks and air compressor disks, can be popularized and used for like parts, and have broad application prospect in a series of new-generation aero-engines and gas turbines, and a technical bottleneck in the broaching of specially-structured high-accuracy small-sized mortises is solved.
Description
Technical field
The present invention relates to the Machining Technology field, emphasis relates to the broaching processing method of disk-like accessory high accuracy, small size tongue-and-groove; A kind of broaching method and dedicated tool thereof of high accuracy small size tongue-and-groove are provided especially.
Background technology
In Machining Technology, particularly in aero-engine, the processing and manufacturing of gas turbine disk-like accessory, tongue-and-groove broaching processing is the key problem in technology of disk-like accessory processing always, and this type of technology receives much concern always.Along with improving constantly of engine thrust-weight ratio and performance, the structure of turbine disk part has also occured greatly to change, tongue-and-groove with the blade connection, not only quantity is many, size is little, and required precision is high, difficulty of processing is large, particularly the tenon groove structure size is special, circular arc basin bottom part position size is wide, and neck notch size is little, to the processing of this type of tongue-and-groove, traditional broaching scheme and broaching tool structural design, cause easily broaching tool to squeeze bits and tipping, forge a knife, have a strong impact on crudy and broaching tool life-span, can't satisfy parts size precision and specification requirement.
A new generation's aero-engine has proposed strict requirement to machining accuracy and manufacturing technology level, high accuracy, new construction, small size tongue-and-groove broaching process technology have become a technical barrier that needs to be resolved hurrily, be badly in need of invention a kind of new technology scheme and dedicated tool for this type of tongue-and-groove broaching, in order to satisfy Aeroengine Design requirement of new generation.People urgently wish to obtain broaching method and the dedicated tool thereof of the good high accuracy small size tongue-and-groove of a kind of technique effect.
Summary of the invention
The broaching method and the dedicated tool thereof that the purpose of this invention is to provide the good high accuracy small size tongue-and-groove of a kind of technique effect.
The invention provides a kind of broaching method of high accuracy small size tongue-and-groove, it is characterized in that: use special-purpose broaching tool that workpiece to be machined is processed; The broaching tool structure of described special use satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner;
The broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
Broaching allowance removing method is: use broaching tool tooth top major cutting edge or/and the chamfered part of broaching tool is processed, the chamfered part of described broaching tool is that the straight chamfering of tooth top blade both sides is or/and rounded corner;
Adopt totally 11 of a whole set of forming broachs, use successively to machine the whole contour shapes of tongue-and-groove; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, participates in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be the broaching of skew back formula; The 11st is broaching tool the smart cutter of tongue-and-groove profile, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement.
In the employed dedicated tool of broaching method of described high accuracy small size tongue-and-groove: the 4-7 all is broaching tool the skew back broaching layout, side edge is main cutting edge, at wedge angle position O and 0 ' (seeing Figure 14, Figure 15) also with relief angle, rise per tooth is 0.015-0.036mm, has guaranteed that physical dimension requirement and the chip removal of broaching tool chip pocket is smooth and easy.
The rise per tooth of each broaching tool satisfies following requirement:
1-3 is thick necking tool 0.024-0.035mm; The 4th is the flute profile necking tool 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
The tooth top chamfering of broaching tool participates in broaching among the present invention.Traditional broaching tool tooth top section mostly is horn structure, just the tooth top position participates in broaching, this broaching layout is because cutting edge is wider, the volume bits are bad during broaching, wear and tear easily in the wedge angle position, very easily produce and strangle cutter, collapse the tooth phenomenon, the present invention improves the broaching tool structure, wedge angle position, both sides, tooth top place increases by 45 ° of chamferings, has namely increased by 45 ° of side cutting edges, participates in simultaneously cutting with the tooth top sword.
During broaching tongue-and-groove bottom land, adopted " eclipsed form " broaching scheme, namely when bottom land is transferred broaching with the smatterer, there is one section to be to repeat broaching, when second cutter carries out the broaching of " overlapping " position, broaching tool circular arc R size guarantees the round and smooth switching of the rear tongue-and-groove profile of broaching than first cutter circular arc R undersized.
The process of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical; Referring to Fig. 7;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905; Referring to Figure 10;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom; Referring to Figure 13;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall; Referring to Figure 16;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle; Referring to Figure 19;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm; Referring to Figure 22;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides; Referring to Figure 25;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding; Referring to Figure 28;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place; Referring to Figure 30;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced (straight mouthful) directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1; Referring to Figure 33;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement; Referring to Figure 36.
The present invention is the dedicated tool of the broaching method of claimed described high accuracy small size tongue-and-groove also, it is characterized in that: described dedicated tool is broaching tool, and its structure satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner.
Totally 11 of a whole set of forming broachs; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, can participate in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be skew back formula broaching structure; The 11st is broaching tool the smart cutter of tongue-and-groove profile, is the broaching structure of full moulding.
The 4-7 all is broaching tool the skew back broaching layout, and side edge is main cutting edge, and also with relief angle, rise per tooth is 0.015-0.036mm at wedge angle position O and 0 ' (seeing Figure 14, Figure 15), the physical dimension that has guaranteed the broaching tool chip pocket require and chip removal smooth and easy.
The rise per tooth of each broaching tool satisfies following requirement:
1-3 is thick necking tool 0.024-0.035mm; The 4th is the flute profile necking tool: 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
The dedicated tool of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical; Referring to Fig. 7;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905; Referring to Figure 10;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom; Referring to Figure 13;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall; Referring to Figure 16;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle; Referring to Figure 19;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm; Referring to Figure 22;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides; Referring to Figure 25;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding; Referring to Figure 28;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place; Referring to Figure 30;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced (straight mouthful) directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1; Referring to Figure 33;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement; Referring to Figure 36.
The invention solves the technical barrier in new construction turbine disk high accuracy, the small size tongue-and-groove broaching process, the tongue-and-groove profile is the dovetail structure, the chamber is young greatly, the tongue-and-groove bottom circular arc wide 8.06mm in chamber, the neck opening part only has 4.30mm, and tongue-and-groove working face profile tolerance is 0.025, and roughness is Ra0.80, so the difficulty of processing of tongue-and-groove profile is very large.Adopt the brand-new process program of tongue-and-groove broaching, the surplus removing method with traditional " along broaching " is adjusted into " skew back broaching " mode, has guaranteed that physical dimension requirement and the chip removal of broaching tool chip pocket is smooth and easy; At the bottom of the broach slot during circular arc, need the smatterer to transfer and finish broaching, conventional switching broaching often causes the trench bottom step, it is not round and smooth to connect cutter, the present invention has improved the broaching tool physical dimension, connecing one section eclipsed form broaching of cutter position design, lap broaching tool circular arc R size is more smaller than the arc size of previous broaching, guarantees to connect the round and smooth switching at cutter position.Traditional tooth top broaching layout forms wedge angle between top and two sides side clearance, very easily causes during broaching and strangles the wearing and tearing of cutter, wedge angle, the volume bits are bad, cause the cutter tooth tipping and forge a knife, change the wedge angle position into 45 ° of chamferings, increased by 45 ° of side cutting edges, efficiently solve the generation of this problem.Improve rise per tooth value in the conventional broaching, guaranteed broaching tool life-span and durability.The optimal design of this project broaching tool structure and broaching scheme, broken through small size, new construction tongue-and-groove broaching efficient is low, the broaching tool durability is low, life-span is short, the tongue-and-groove dimensional accuracy is difficult for the technical bottleneck problem of assurance, has leading domestic level, to guaranteeing the dimensional accuracy of processing parts, uniformity and the stabilized product quality of specification requirement have played important function, can effectively reduce the impact of human factor, the present invention rouses the effect that class part broaching processing and manufacturing technical merit has very large reference to the General Promotion dish, can promote the use of all kinds of dishes, in the broaching processing of drum barrel class part dovetail tongue-and-groove.Have broad application prospects and the conversion prospect in aero-engine of new generation, gas turbine field.
The present invention is mainly used in aero-engine and gas turbine core component such as the turbine disk, compressor disc part tongue-and-groove broaching processing, solved the technical bottleneck of special construction high accuracy small size tongue-and-groove broaching, can in same kind of parts, promote the use of, in aero-engine of new generation, power combustion engine series, have broad application prospects.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 is broaching scheme schematic diagram of the present invention;
Fig. 2 is the broaching tool Pareto diagram;
Fig. 3 is part to be processed structural representation of the present invention;
Fig. 4 is the tenon groove structure size schematic diagram at the processed position of part to be processed of the present invention;
Fig. 5 is the 1st broaching tool structural representation sketch;
Fig. 6 is the broaching tool partial enlarged drawing corresponding with Fig. 5;
Fig. 7 is processed position partial enlarged drawing behind the broaching tool corresponding with Fig. 5 processing part to be processed;
Fig. 8 is the 2nd broaching tool structural representation sketch;
Fig. 9 is the broaching tool partial enlarged drawing corresponding with Fig. 8;
Figure 10 is processed position partial enlarged drawing behind the broaching tool corresponding with Fig. 8 processing part to be processed;
Figure 11 is the 3rd broaching tool structural representation sketch;
Figure 12 is the broaching tool partial enlarged drawing corresponding with Figure 11;
Figure 13 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 11 processing part to be processed;
Figure 14 is the 4th broaching tool structural representation sketch;
Figure 15 is the broaching tool partial enlarged drawing corresponding with Figure 14;
Figure 16 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 14 processing part to be processed;
Figure 17 is the 5th broaching tool structural representation sketch;
Figure 18 is the broaching tool partial enlarged drawing corresponding with Figure 17;
Figure 19 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 17 processing part to be processed;
Figure 20 is the 6th broaching tool structural representation sketch;
Figure 21 is the broaching tool partial enlarged drawing corresponding with Figure 20;
Figure 22 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 20 processing part to be processed;
Figure 23 is the 7th broaching tool structural representation sketch;
Figure 24 is the broaching tool partial enlarged drawing corresponding with Figure 23;
Figure 25 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 23 processing part to be processed;
Figure 26 is the 8th broaching tool structural representation sketch;
Figure 27 is the broaching tool partial enlarged drawing corresponding with Figure 26;
Figure 28 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 26 processing part to be processed;
Figure 29 is the 9th broaching tool structural representation sketch;
Figure 30 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 29 processing part to be processed;
Figure 31 is the 10th broaching tool structural representation sketch;
Figure 32 is the broaching tool partial enlarged drawing corresponding with Figure 31;
Figure 33 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 31 processing part to be processed;
Figure 34 is the 11st broaching tool structural representation sketch;
Figure 35 is the broaching tool partial enlarged drawing corresponding with Figure 34;
Figure 36 is processed position partial enlarged drawing behind the broaching tool corresponding with Figure 34 processing part to be processed.
The specific embodiment
The dedicated tool of the broaching method of high accuracy small size tongue-and-groove, described dedicated tool are broaching tool, and its structure satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner.
Totally 11 of a whole set of forming broachs; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, can participate in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be skew back formula broaching structure; The 11st is broaching tool the smart cutter of tongue-and-groove profile, is the broaching structure of full moulding.
The 4-7 all is broaching tool the skew back broaching layout, and side edge is main cutting edge, and also with relief angle, rise per tooth is 0.015-0.036mm at wedge angle position O and 0 ' (seeing Figure 14, Figure 15), the physical dimension that has guaranteed the broaching tool chip pocket require and chip removal smooth and easy.
The rise per tooth of each broaching tool satisfies following requirement:
1-3 is thick necking tool 0.024-0.035mm; The 4th is the flute profile necking tool: 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
The dedicated tool of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical; Referring to Fig. 7;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905; Referring to Figure 10;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom; Referring to Figure 13;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall; Referring to Figure 16;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle; Referring to Figure 19;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm; Referring to Figure 22;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides; Referring to Figure 25;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding; Referring to Figure 28;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place; Referring to Figure 30;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced (straight mouthful) directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1; Referring to Figure 33;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement; Referring to Figure 36.
The described Special broach of present embodiment has solved the technical barrier in new construction turbine disk high accuracy, the small size tongue-and-groove broaching process, the tongue-and-groove profile is the dovetail structure, the chamber is young greatly, the tongue-and-groove bottom circular arc wide 8.06mm in chamber, the neck opening part only has 4.30mm, and tongue-and-groove working face profile tolerance is 0.025, and roughness is Ra0.80, so the difficulty of processing of tongue-and-groove profile is very large.Adopt the brand-new process program of tongue-and-groove broaching, the surplus removing method with traditional " along broaching " is adjusted into " skew back broaching " mode, has guaranteed that physical dimension requirement and the chip removal of broaching tool chip pocket is smooth and easy; At the bottom of the broach slot during circular arc, need the smatterer to transfer and finish broaching, conventional switching broaching often causes the trench bottom step, it is not round and smooth to connect cutter, present embodiment has improved the broaching tool physical dimension, connecing one section eclipsed form broaching of cutter position design, lap broaching tool circular arc R size is more smaller than the arc size of previous broaching, guarantees to connect the round and smooth switching at cutter position.Traditional tooth top broaching layout forms wedge angle between top and two sides side clearance, very easily causes during broaching and strangles the wearing and tearing of cutter, wedge angle, the volume bits are bad, cause the cutter tooth tipping and forge a knife, change the wedge angle position into 45 ° of chamferings, increased by 45 ° of side cutting edges, efficiently solve the generation of this problem.Improve rise per tooth value in the conventional broaching, guaranteed broaching tool life-span and durability.The optimal design of the described broaching tool structure of present embodiment and broaching scheme, broken through small size, new construction tongue-and-groove broaching efficient is low, the broaching tool durability is low, life-span is short, the tongue-and-groove dimensional accuracy is difficult for the technical bottleneck problem of assurance, has leading domestic level, to guaranteeing the dimensional accuracy of processing parts, uniformity and the stabilized product quality of specification requirement have played important function, can effectively reduce the impact of human factor, present embodiment rouses the effect that class part broaching processing and manufacturing technical merit has very large reference to the General Promotion dish, can promote the use of all kinds of dishes, in the broaching processing of drum barrel class part dovetail tongue-and-groove.Have broad application prospects and the conversion prospect in aero-engine of new generation, gas turbine field.
The described Special broach of present embodiment is mainly used in aero-engine and gas turbine core component such as the turbine disk, compressor disc part tongue-and-groove broaching processing, solved the technical bottleneck of special construction high accuracy small size tongue-and-groove broaching, can in same kind of parts, promote the use of, in aero-engine of new generation, power combustion engine series, have broad application prospects.
A kind of broaching method of high accuracy small size tongue-and-groove: use special-purpose broaching tool that workpiece to be machined is processed; The broaching tool structure of described special use satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner;
The broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
Broaching allowance removing method is: use broaching tool tooth top major cutting edge or/and the chamfered part of broaching tool is processed, the chamfered part of described broaching tool is that the straight chamfering of tooth top blade both sides is or/and rounded corner;
Adopt totally 11 of a whole set of forming broachs, use successively to machine the whole contour shapes of tongue-and-groove; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, participates in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be the broaching of skew back formula; The 11st is broaching tool the smart cutter of tongue-and-groove profile, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement.
In the employed dedicated tool of broaching method of described high accuracy small size tongue-and-groove: the 4-7 all is broaching tool the skew back broaching layout, side edge is main cutting edge, at wedge angle position O and 0 ' (seeing Figure 14, Figure 15) also with relief angle, rise per tooth is 0.015-0.036mm, has guaranteed that physical dimension requirement and the chip removal of broaching tool chip pocket is smooth and easy.
The rise per tooth of each broaching tool satisfies following requirement:
1-3 is thick necking tool 0.024-0.035mm; The 4th is the flute profile necking tool 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
The tooth top chamfering of broaching tool participates in broaching in the present embodiment.Traditional broaching tool tooth top section mostly is horn structure, just the tooth top position participates in broaching, this broaching layout is because cutting edge is wider, the volume bits are bad during broaching, wear and tear easily in the wedge angle position, very easily produce and strangle cutter, collapse the tooth phenomenon, present embodiment improves the broaching tool structure, wedge angle position, both sides, tooth top place increases by 45 ° of chamferings, has namely increased by 45 ° of side cutting edges, participates in simultaneously cutting with the tooth top sword.
During broaching tongue-and-groove bottom land, adopted " eclipsed form " broaching scheme, namely when bottom land is transferred broaching with the smatterer, there is one section to be to repeat broaching, when second cutter carries out the broaching of " overlapping " position, broaching tool circular arc R size guarantees the round and smooth switching of the rear tongue-and-groove profile of broaching than first cutter circular arc R undersized.
The process of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical; Referring to Fig. 7;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905; Referring to Figure 10;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom; Referring to Figure 13;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall; Referring to Figure 16;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle; Referring to Figure 19;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm; Referring to Figure 22;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides; Referring to Figure 25;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding; Referring to Figure 28;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place; Referring to Figure 30;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced (straight mouthful) directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1; Referring to Figure 33;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement; Referring to Figure 36.
Present embodiment is the dedicated tool of the broaching method of claimed described high accuracy small size tongue-and-groove also, it is characterized in that: described dedicated tool is broaching tool, and its structure satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner.
Totally 11 of a whole set of forming broachs; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, can participate in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be skew back formula broaching structure; The 11st is broaching tool the smart cutter of tongue-and-groove profile, is the broaching structure of full moulding.
The 4-7 all is broaching tool the skew back broaching layout, and side edge is main cutting edge, and also with relief angle, rise per tooth is 0.015-0.036mm at wedge angle position O and 0 ' (seeing Figure 14, Figure 15), the physical dimension that has guaranteed the broaching tool chip pocket require and chip removal smooth and easy.
The rise per tooth of each broaching tool satisfies following requirement:
1-3 is thick necking tool 0.024-0.035mm; The 4th is the flute profile necking tool: 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
The dedicated tool of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical; Referring to Fig. 7;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905; Referring to Figure 10;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom; Referring to Figure 13;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall; Referring to Figure 16;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle; Referring to Figure 19;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm; Referring to Figure 22;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides; Referring to Figure 25;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding; Referring to Figure 28;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place; Referring to Figure 30;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced (straight mouthful) directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1; Referring to Figure 33;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement; Referring to Figure 36.
Architectural feature about broaching tool also is described as follows:
1. traditional dovetail tongue-and-groove broaching layout is the surplus removing method of " along broaching ", because described dovetail tongue-and-groove " chamber is large, young ", overall dimensions is little, traditional broaching layout can cause the broaching tool chip pocket too small, broaching tool can't chip removal, cause tipping, forge a knife, present embodiment has adopted brand-new " skew back broaching " mode, has guaranteed that physical dimension requirement and the chip removal of broaching tool chip pocket is smooth and easy.
When 2. broaching the tongue-and-groove bottom land, one can't finish broaching to cutter, needs smatterer's " docking " to finish the broaching of tongue-and-groove bottom circular arc and both sides circular arc, and during actual broaching, it is not round and smooth to connect the bottom land circular arc switching of cutter position like this, and there is projection the part, the impact quality of broaching.Present embodiment has adopted " eclipsed form " broaching scheme, namely when bottom land is broached the broaching tool switching with the 7th handle, the 8th respectively, there is one section to be to repeat broaching, the 8th carries out " overlapping " position when broaching to cutter, broaching tool circular arc R size is more smaller than tongue-and-groove bottom land circular arc R size (namely first cutter circular arc R size), has guaranteed the round and smooth switching of tongue-and-groove profile after the broaching.
3. the tooth top chamfering of each broaching tool participates in broaching.Traditional broaching tool tooth top section mostly is horn structure, and just the tooth top position participates in broaching, and this broaching layout is because cutting edge is wider, and the volume bits are bad during broaching, very easily produce and strangle cutter, collapse the tooth phenomenon, not only caused the broaching tool damage, even can cause part to scrap.Improve the broaching tool structure, wedge angle position, both sides, tooth top place increases by 45 ° of chamferings, has namely increased by 45 ° of side cutting edges, and the rise per tooth of controlling this cutting edge is 0.015-0.024mm, has stopped the generation of this problem.
4. the 4-7,9-10 all be broaching tool the skew back broaching layout, wherein 4-7 is the broaching tool side edge main cutting edge, also with relief angle, rise per tooth is 0.015-0.036mm at wedge angle position O and 0 ' (seeing Fig. 4 .4a).
Present embodiment has solved the technical barrier in new construction turbine disk high accuracy, the small size tongue-and-groove broaching process, the tongue-and-groove profile is the dovetail structure, the chamber is young greatly, the tongue-and-groove bottom circular arc wide 8.06mm in chamber, the neck opening part only has 4.30mm, and tongue-and-groove working face profile tolerance is 0.025, and roughness is Ra0.80, so the difficulty of processing of tongue-and-groove profile is very large.Adopt the brand-new process program of tongue-and-groove broaching, the surplus removing method with traditional " along broaching " is adjusted into " skew back broaching " mode, has guaranteed that physical dimension requirement and the chip removal of broaching tool chip pocket is smooth and easy; At the bottom of the broach slot during circular arc, need the smatterer to transfer and finish broaching, conventional switching broaching often causes the trench bottom step, it is not round and smooth to connect cutter, present embodiment has improved the broaching tool physical dimension, connecing one section eclipsed form broaching of cutter position design, lap broaching tool circular arc R size is more smaller than the arc size of previous broaching, guarantees to connect the round and smooth switching at cutter position.Traditional tooth top broaching layout forms wedge angle between top and two sides side clearance, very easily causes during broaching and strangles the wearing and tearing of cutter, wedge angle, the volume bits are bad, cause the cutter tooth tipping and forge a knife, change the wedge angle position into 45 ° of chamferings, increased by 45 ° of side cutting edges, efficiently solve the generation of this problem.Improve rise per tooth value in the conventional broaching, guaranteed broaching tool life-span and durability.The optimal design of present embodiment broaching tool structure and broaching scheme, broken through small size, new construction tongue-and-groove broaching efficient is low, the broaching tool durability is low, life-span is short, the tongue-and-groove dimensional accuracy is difficult for the technical bottleneck problem of assurance, has leading domestic level, to guaranteeing the dimensional accuracy of processing parts, uniformity and the stabilized product quality of specification requirement have played important function, can effectively reduce the impact of human factor, present embodiment rouses the effect that class part broaching processing and manufacturing technical merit has very large reference to the General Promotion dish, can promote the use of all kinds of dishes, in the broaching processing of drum barrel class part dovetail tongue-and-groove.Have broad application prospects and the conversion prospect in aero-engine of new generation, gas turbine field.
Present embodiment is mainly used in aero-engine and gas turbine core component such as the turbine disk, compressor disc part tongue-and-groove broaching processing, solved the technical bottleneck of special construction high accuracy small size tongue-and-groove broaching, can in same kind of parts, promote the use of, in aero-engine of new generation, power combustion engine series, have broad application prospects.
Present embodiment adopts import numerical control high-speed side broaching machine, main driving power 135KW, 25 tons of specified pulling force, range 7500mm.Be 1.5m/min according to the nc program of working out, employing broaching speed, carry out item by item according to procedure of processing, both pressed Fig. 5-broaching step schematic diagram shown in Figure 36 and described procedure of processing, finish whole process.The moulding of both once having broached has been finished respectively tongue-and-groove quantity and is the broaching of three kinds of turbine disk dovetail tongue-and-grooves of 149,146,136, and promoted the use of in the tongue-and-groove processing of like product.
According to described procedure and contents requirement, carry out dovetail tongue-and-groove broaching processing, tongue-and-groove size after the processing proves after testing, its profile tolerance and dimensional accuracy meet design requirement fully, crudy is stable, the broaching tool durability is high, and broaching efficient improves 30%, has obtained obvious useful technique effect and economic benefit.Embodiment and the application of Broaching Technology scheme, broaching tool structure and dimensional parameters that present embodiment is related, changed traditional Broaching Technology, broken through aero-engine new construction high accuracy small size tongue-and-groove broaching key problem in technology of new generation, guarantee the strict every specification requirements such as profile tolerance, dimensional tolerance and surface roughness of new construction high accuracy tongue-and-groove, reached leading domestic level.
The processing that the broaching method of the described high accuracy small size of present embodiment tongue-and-groove and the correlation technique of dedicated tool thereof can be widely used in coiling bulging class part, on the basis of former cutter structure, dimensional parameters design principle, suitably adjust improvement of cutter parameter size according to reality processing needs, fully applicable on the series of products, enlarge user demand, can create huge economic benefit.
Claims (9)
1. the broaching method of a high accuracy small size tongue-and-groove is characterized in that: use special-purpose broaching tool that workpiece to be machined is processed; The broaching tool structure of described special use satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner;
The broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
Broaching allowance removing method is: use broaching tool tooth top major cutting edge or/and the chamfered part of broaching tool is processed, the chamfered part of described broaching tool is that the straight chamfering of tooth top blade both sides is or/and rounded corner;
Adopt totally 11 of a whole set of forming broachs, use successively to machine the whole contour shapes of tongue-and-groove; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, participates in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be the broaching of skew back formula; The 11st is broaching tool the smart cutter of tongue-and-groove profile, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement.
2. according to the broaching method of the described high accuracy small size of claim 1 tongue-and-groove, it is characterized in that: the 4-7 all is broaching tool the skew back broaching layout, and side edge is main cutting edge, and also with relief angle, rise per tooth is 0.015-0.036mm at wedge angle position O and O '.
3. according to the broaching method of the described high accuracy small size of claim 2 tongue-and-groove, it is characterized in that: it is thick necking tool 0.024-0.035mm that the rise per tooth of each broaching tool satisfies following requirement: 1-3; The 4th is the flute profile necking tool: 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
4. according to the broaching method of one of them described high accuracy small size tongue-and-groove of claim 1-3, it is characterized in that: the process of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement.
5. the dedicated tool of the broaching method of the described high accuracy small size of claim 1 tongue-and-groove, it is characterized in that: described dedicated tool is broaching tool, and its structure satisfies following requirement: the tooth top of broaching tool is provided with the straight chamfering that can participate in broaching or/and rounded corner.
6. according to the dedicated tool of the broaching method of the described high accuracy small size of claim 5 tongue-and-groove, it is characterized in that: totally 11 of a whole set of forming broachs; Wherein: 1-3 is the thick necking tool of broaching tool, and tooth top and two sides have formed 45 ° of side cutting edges all with 45 ° of chamferings, can participate in simultaneously cutting with the tooth top sword; The 4-7 broaching tool flute profile necking tool, all is the skew back broaching layout, and side edge is main cutting edge; The 8th R cutter at the bottom of the broach slot of FIG, and tooth top and both sides switching fillet R1.5 are main cutting, are used for finishing the broaching of bottom land profile; The 9th the thick cutter of broaching tool notch degree face, the 10th broaching tool notch degree face and straight mouthful of smart cutter, be skew back formula broaching structure; The 11st is broaching tool the smart cutter of tongue-and-groove profile, is the broaching structure of full moulding.
7. according to the dedicated tool of the broaching method of the described high accuracy small size of claim 6 tongue-and-groove, it is characterized in that: the 4-7 all is broaching tool the skew back broaching layout, side edge is main cutting edge, and also with relief angle, rise per tooth is 0.015-0.036mm at wedge angle position O and 0 '.
8. according to the dedicated tool of the broaching method of the described high accuracy small size of claim 7 tongue-and-groove, it is characterized in that: it is thick necking tool 0.024-0.035mm that the rise per tooth of each broaching tool satisfies following requirement: 1-3; The 4th is the flute profile necking tool: 0.02-0.023mm; The 5th is the flute profile necking tool: 0.015-0.025mm; The 6th is the flute profile necking tool: 0.019-0.022mm; The 7th is the flute profile necking tool: 0.034-0.036mm; The 8th is R cutter at the bottom of the kerve: 0-0.02mm; The 9th is the thick cutter of notch degree face: 0.021mm; The 10th reaches notch degree face directly, and a mouthful smart cutter is 0-0.02mm; The 11st the smart cutter first paragraph of tongue-and-groove profile 0.02-0.03mm; Second segment 0-0.02mm.
9. according to the dedicated tool of the broaching method of one of them described high accuracy small size tongue-and-groove of claim 5-8, it is characterized in that: the dedicated tool of the broaching method of described high accuracy small size tongue-and-groove satisfies following requirement:
1) the 1st thick necking tool, will leave wide 4.1mm, dark 2.28 groove at wheel disc entity cylindrical;
2) the 2nd thick necking tool, will on the basis of the 1st fluting, continue fluting, groove width 3.9, the groove of groove depth to 4.905;
3) the 3rd thick necking tool, will the 2nd the basis of fluting on, continue fluting, groove width 3.7, groove depth to 7.18, and form the groove of the circular arc R 15 of trench bottom;
4) the 4th the flute profile necking tool, be the 1-3 the basis of thick necking tool on,, form "＜＞" shape to the width expansion, it is 5.593 flute profile that upper lower inclined plane is respectively 50 ° and 45 °, beam overall;
5) the 5th the flute profile necking tool, be the 4th the basis of flute profile necking tool on, continue to spread to 6.957mm by same shape and angle;
6) the 6th the flute profile necking tool, be the 5th the basis of flute profile necking tool on, continue to widen, expand dark, " the skew back sword " of both sides is main cutting edge, width reaches 7.96mm;
7) the 7th the flute profile necking tool, be the 6th the basis of flute profile necking tool on, circular arc R 15 and the R1.5 of both sides at the bottom of the broach slot make the bottom profile pre-profiling of tongue-and-groove both sides;
8) the 8th bottom land R cutter, is exclusively used in broaching tongue-and-groove complete circular arc R 15 and the R1.5 in bottom, makes the bottom land moulding;
9) the 9th the thick cutter of notch degree face, is exclusively used in broaching 10 ° of inclined-planes, both sides, tongue-and-groove neck notch place;
10) the 10th notch degree face and straight mouthful smart cutter, on the basis of the 9th thick cutter broaching notch degree face, broaching tongue-and-groove neck notch is faced directly, form the opening part width 4.35 of tongue-and-groove, continue broaching 10 ° of inclined-planes, both sides, notch place, and make 10 ° of inclined-planes of straight mouth and both sides form the connecting arc of R1+0.1;
11) the 11st being tongue-and-groove profile finishing broach, identical with the tongue-and-groove profile of part, for the broaching layout of full moulding, finishes the final broaching of tongue-and-groove profile, reaches the design drawing requirement.
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| CN106424917A (en) * | 2016-10-11 | 2017-02-22 | 恒锋工具股份有限公司 | Workpiece machining method for wheel groove finishing broach with wheel cut tooth profile |
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| CN107363331A (en) * | 2017-09-13 | 2017-11-21 | 湖南南方通用航空发动机有限公司 | Tongue-and-groove broaching tool |
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| CN111112738A (en) * | 2019-12-25 | 2020-05-08 | 呼和浩特众环工贸股份有限公司 | Broach group and broach machine tool for clamping jaw machining |
| CN111112738B (en) * | 2019-12-25 | 2021-05-04 | 呼和浩特众环工贸股份有限公司 | Broach group and broach machine tool for clamping jaw machining |
| CN111702249B (en) * | 2020-06-30 | 2021-05-25 | 中国航发动力股份有限公司 | Broach group structure for grooving wheel disc tenon and mortise and grooving method |
| CN111702249A (en) * | 2020-06-30 | 2020-09-25 | 中国航发动力股份有限公司 | Broach group structure for grooving wheel disc tenon and mortise and grooving method |
| CN111832129A (en) * | 2020-07-01 | 2020-10-27 | 上海交通大学 | Multi-constraint optimization-based mortise rough broaching allowance optimization method |
| CN114473035A (en) * | 2022-03-31 | 2022-05-13 | 重庆江增船舶重工有限公司 | Method for machining mortise of main shaft of turbocharger |
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