CN103286337A - Method for processing stepped hole in precise molded surface of titanium alloy casing - Google Patents
Method for processing stepped hole in precise molded surface of titanium alloy casing Download PDFInfo
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- CN103286337A CN103286337A CN2012100486434A CN201210048643A CN103286337A CN 103286337 A CN103286337 A CN 103286337A CN 2012100486434 A CN2012100486434 A CN 2012100486434A CN 201210048643 A CN201210048643 A CN 201210048643A CN 103286337 A CN103286337 A CN 103286337A
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Abstract
The invention relates to a method for processing a stepped hole in a precise molded surface of a titanium alloy casing. A processed part is made of cast titanium alloy and has a mark number of ZTC4. The method is characterized by comprising steps as follows: the stepped hole in the precise molded surface of the titanium alloy casing is processed in a reverse hole boring manner; a corresponding specification of an integral boring cutter is selected according to the diameter of a bottom hole; and when the hole is actually processed, the boring cutter firstly eccentrically enters the bottom of the hole, and after the boring cutter completely penetrates through a hole depth, the rotary center of a cutter rod is returned to the center position of the bottom hole, then reverse hole boring is performed from inside to outside until the depth and the radial dimension of the hole are bored to be qualified. According to the hole processing method, the technical requirements are all met, the hole processing quality is stable, and the hole processing efficiency is improved; and the method is a feasible method for processing stepped holes of materials which are difficult to process and have complicated structures.
Description
Technical field:
The present invention relates to the Machining Technology field of the accurate profile stepped hole of difficult processing metal, the processing method of the accurate profile stepped hole of a kind of titanium alloy casing is provided especially.
Background technology:
In the prior art, traditional stepped hole (the big outer hole of endoporus is little) adopted split type cutter head and knife bar processing at radial drilling machine mostly in the past, all need knife bar is stretched into back cutter head of clamping on knife bar in the hole during every processing one place stepped hole, unload cutter head after the hole machines again and withdraw from knife bar.The method institute processing step hole efficient is low, quality is unstable.Can't process with traditional diamond-making technique for profile stepped hole radially.
The normal employing in the titanium alloy material stepped hole prior art milled processing mode.Existing problems and shortcoming: the processing of milling of stepped hole is subjected to the bottom outlet size restrictions, the bottom outlet size is less, milling cutter knife bar diameter is corresponding little, inevitable correspondence makes the cutter rigidity die down, add and need the feed several times of little cutting-in man-hour, the existence of processing rear end face connects tool marks, and working (machining) efficiency is extremely low, and crudy can't guarantee.
Therefore, people expect to obtain the processing method of the accurate profile stepped hole of the good titanium alloy casing of a kind of technique effect.
Summary of the invention:
The processing method that the purpose of this invention is to provide the accurate profile stepped hole of the good titanium alloy casing of a kind of technique effect.
The invention provides the processing method of the accurate profile stepped hole of a kind of titanium alloy casing, the work piece material is cast titanium alloy, and the trade mark is ZTC4, belongs to (alpha+beta) titanium alloy; This titanium alloy has higher intensity and hardness, poor thermal conductivity; Cutter easily produced bonding abrasion and diffusive wear when cutting was the titanium alloy of representative with this kind titanium alloy, caused the point of a knife cracky, so machinability is poor, was difficult-to-machine material, and the traditional diamond-making technique technique effect is demanded urgently improving; It is characterized in that: the processing method of the accurate profile stepped hole of described titanium alloy casing specifically is to adopt the accurate profile stepped hole of mode machining titanium alloy casing of anti-bore hole, select the whole boring cutter of corresponding specification for use according to the bottom diameter size, in earlier boring cutter off-centre being entered at the bottom of the hole during actual boring machining hole, fully by after the hole depth, the knife bar centre of gyration is got back to the bottom outlet center, carry out the processing of anti-bore hole more from inside to outside, until the degree of depth in hole and radial dimension boring be machined to qualified till.
In the processing method of the accurate profile stepped hole of titanium alloy casing of the present invention, employed whole boring cutter is the whole boring cutter of single-blade in the processing method of the accurate profile stepped hole of described titanium alloy casing, it is made of knife bar 1, cutter head 2, blade 3, wherein: knife bar 1 and cutter head 2 are shaft parts that coaxial fixed order connects as one, and blade 3 fixed and arranged are in the end of cutter head 2 away from that end of knife bar 1; It is characterized in that: the whole boring cutter total length of described single-blade 100mm, the axis farthest that cutter head 2 is departed from blade 3 installation sites is 6-7mm apart from axis, is 5-8mm along blade 3 length of the axis direction of cutter head 2;
Blade 3 is block structure, is straight line along blade 3 vertical sections of the axis direction of cutter head 2 and blade 3 away from the lateral surface intersection of cutter head 2 axis directions; Blade 3 begins to increase gradually near knife bar 1 one sides to blade 3 away from knife bar 1 one sides from blade 3 away from the distance between the axis of the lateral surface of cutter head 2 axis and cutter head 2; Blade 3 is the conical surface away from the lateral surface of cutter head 2 axis, and the angle of the axis direction of itself and cutter head 2 is 10 °.The whole boring cutter of described single-blade is simple in structure, the reliability height, and good rigidity, technique effect is good.
The accurate profile stepped hole of described titanium alloy casing is specially titanium alloy intermediary casing stator installing hole, and it specifically satisfies following requirement: the aperture of the installing hole in the shoulder hole and requirement are Φ 15+0.1mm, and outer hole and the requirement of interior stepped hole are
Two sector hole axialities require to be Φ 0.1; Surface roughness requires to be Ra1.60 μ m;
Carry out that employed technological parameter satisfies following requirement in the process of hole: revolution n=300r/min, amount of feeding f=0.05mm/r, cutting depth: ap=1.5mm.
The common hardware device of the present invention basis is the accurate digital control machining center.
Accordingly, if material changes free machining materials such as aluminium alloy into, bore hole can adopt the cutting way that strengthens the amount of feeding, i.e. f=0.1～0.15mm/r
Should use the W-Co kind carbide alloy little with the titanizing compatibility, that thermal conductivity good, intensity is higher during cutting.Now use Tool in Cutting part material YD15, tool specification and physical dimension are seen Fig. 2.For increasing the cutter rigidity, the knife bar partial design becomes ellipticity, and minor axis radius is stretched out Gao's branch length sum with point of a knife and equated that with major diameter be designed to 10mm, the workpiece bottom diameter is 12mm, and the workpiece that satisfies that like this can be best is processed and the requirement of cutter rigidity.
Because of the Workpiece structure complexity, and be the titanium alloy difficult-to-machine material, the stepped hole diameter is little, and locus, inside and outside radial hole place is narrow, and other scheme holes all can't process, and can only adopt the anti-bore hole of numerical control at the accurate digital control machining center; Satisfied the processing request in hole.
Adopt the hole of anti-boring processing method processing, specification requirement is all qualified, and the stable processing quality in hole has improved the hole working (machining) efficiency.
Adopt anti-boring processing technology technology and manufacture method at stepped hole (outer hole is 121 ° of Φ) processing in the Φ 15+0.1 of casing stator installing hole place of titanium alloy intermediary, adopt anti-boring process technology to finish the processing of two component parts for assembly of a machine intermediary casing stator installing holes, for the processing of the stepped hole of other similar casing difficult-to-machine material provides a kind of feasible method.
Adopt the hole of anti-boring process technology processing to meet the demands, namely Jia Gong installing hole and the 01 axiality specification requirement of the Φ between the bottom outlet are all qualified.
In terms of existing technologies, the present invention adopts anti-boring process technology to the processing of titanium alloy ZTC4 intermediary casing stator installing hole, for the processing of the stepped hole of other similar casing difficult-to-machine material provides a kind of feasible method.
Description of drawings:
Fig. 1 is provided with intermediary's casing simplified schematic diagram of the titanium alloy ZTC4 material of stator installing hole for embodiment 1 described its;
Fig. 2 is the whole boring cutter structural representation of single-blade sketch;
Fig. 3 is the A-A cutaway view of Fig. 2.
Concrete real mode:
Embodiment 1
The processing method of the accurate profile stepped hole of a kind of titanium alloy casing, work piece (structure is referring to Fig. 1) material is cast titanium alloy, the trade mark is ZTC4, belongs to (alpha+beta) titanium alloy; This titanium alloy has higher intensity and hardness, poor thermal conductivity; Cutter easily produced bonding abrasion and diffusive wear when cutting was the titanium alloy of representative with this kind titanium alloy, caused the point of a knife cracky, so machinability is poor, was difficult-to-machine material, and the traditional diamond-making technique technique effect is demanded urgently improving; The processing method of the accurate profile stepped hole of described titanium alloy casing specifically is to adopt the accurate profile stepped hole of mode machining titanium alloy casing of anti-bore hole, select the whole boring cutter of corresponding specification for use according to the bottom diameter size, in earlier boring cutter off-centre being entered at the bottom of the hole during actual boring machining hole, fully by after the hole depth, the knife bar centre of gyration is got back to the bottom outlet center, carry out the processing of anti-bore hole more from inside to outside, until the degree of depth in hole and radial dimension boring be machined to qualified till.
In the processing method of the accurate profile stepped hole of described titanium alloy casing, employed whole boring cutter is the whole boring cutter of single-blade in the processing method of the accurate profile stepped hole of described titanium alloy casing, referring to Fig. 2, Fig. 3, the whole boring cutter of single-blade is made of knife bar 1, cutter head 2, blade 3, wherein: knife bar 1 and cutter head 2 are shaft parts that coaxial fixed order connects as one, and blade 3 fixed and arranged are in the end of cutter head 2 away from that end of knife bar 1;
The whole boring cutter total length of described single-blade 100mm, the axis farthest that cutter head 2 is departed from blade 3 installation sites is 6-7mm apart from axis, is 5-8mm along blade 3 length of the axis direction of cutter head 2;
Blade 3 is block structure, is straight line along blade 3 vertical sections of the axis direction of cutter head 2 and blade 3 away from the lateral surface intersection of cutter head 2 axis directions; Blade 3 begins to increase gradually near knife bar 1 one sides to blade 3 away from knife bar 1 one sides from blade 3 away from the distance between the axis of the lateral surface of cutter head 2 axis and cutter head 2; Blade 3 is the conical surface away from the lateral surface of cutter head 2 axis, and the angle of the axis direction of itself and cutter head 2 is 10 °.The whole boring cutter of described single-blade is simple in structure, the reliability height, and good rigidity, technique effect is good.
The accurate profile stepped hole of described titanium alloy casing is specially titanium alloy intermediary casing stator installing hole, and it specifically satisfies following requirement: the aperture of the installing hole in the shoulder hole and requirement are Φ 15+0.1mm, and outer hole and the requirement of interior stepped hole are
Two sector hole axialities require to be Φ 0.1; Surface roughness requires to be Ra1.60 μ m;
Carry out that employed technological parameter satisfies following requirement in the process of hole: revolution n=300r/min, amount of feeding f=0.05mm/r, cutting depth: ap=1.5mm.
The hardware device basis of present embodiment is the accurate digital control machining center.
Accordingly, if material changes free machining materials such as aluminium alloy into, bore hole can adopt the cutting way that strengthens the amount of feeding, i.e. f=0.1～0.15mm/r.
Should use the W-Co kind carbide alloy little with the titanizing compatibility, that thermal conductivity good, intensity is higher during cutting.Institute uses the cutting tip material of cutter to be YD15, and tool specification and physical dimension are seen Fig. 2, Fig. 3.For increasing the cutter rigidity, the knife bar partial design becomes ellipticity, and minor axis radius is stretched out Gao's branch length sum with point of a knife and equated that with major diameter be designed to 10mm, the workpiece bottom diameter is 12mm, and the workpiece that satisfies that like this can be best is processed and the requirement of cutter rigidity.
Because of the Workpiece structure complexity, and be the titanium alloy difficult-to-machine material, the stepped hole diameter is little, and locus, inside and outside radial hole place is narrow, and other scheme holes all can't process, and can only adopt the anti-bore hole of numerical control at the accurate digital control machining center; Satisfied the processing request in hole.
Adopt the hole of anti-boring processing method processing, specification requirement is all qualified, and the stable processing quality in hole has improved the hole working (machining) efficiency.
Adopt anti-boring processing technology technology and manufacture method at stepped hole (outer hole is 121 ° of Φ) processing in the Φ 15+0.1 of casing stator installing hole place of titanium alloy intermediary, adopt anti-boring process technology to finish the processing of two component parts for assembly of a machine intermediary casing stator installing holes, for the processing of the stepped hole of other similar casing difficult-to-machine material provides a kind of feasible method.
Adopt the hole of anti-boring process technology processing to meet the demands, namely Jia Gong installing hole and the 01 axiality specification requirement of the Φ between the bottom outlet are all qualified.
In terms of existing technologies, present embodiment adopts anti-boring process technology to the processing of titanium alloy ZTC4 intermediary casing stator installing hole, for the processing of the stepped hole of other similar casing difficult-to-machine material provides a kind of feasible method.
Embodiment 2
(the work piece material is cast titanium alloy ZTC4 to the processing method of the accurate profile stepped hole of a kind of titanium alloy casing, the concrete structure of work piece is different from Fig. 1): the accurate profile stepped hole of mode machining titanium alloy casing that adopts anti-bore hole, select the whole boring cutter of corresponding specification for use according to the bottom diameter size, in earlier boring cutter off-centre being entered at the bottom of the hole during actual boring machining hole, fully by after the hole depth, the knife bar centre of gyration is got back to the bottom outlet center, carry out the processing of anti-bore hole more from inside to outside, until the degree of depth in hole and radial dimension boring be machined to qualified till.
In the processing method of the accurate profile stepped hole of described titanium alloy casing, employed whole boring cutter is the whole boring cutter of single-blade in the processing method of the accurate profile stepped hole of described titanium alloy casing, referring to Fig. 2, Fig. 3, the whole boring cutter of single-blade is made of knife bar 1, cutter head 2, blade 3, wherein: knife bar 1 and cutter head 2 are shaft parts that coaxial fixed order connects as one, and blade 3 fixed and arranged are in the end of cutter head 2 away from that end of knife bar 1;
The whole boring cutter total length of described single-blade 100mm, the axis farthest that cutter head 2 is departed from blade 3 installation sites is 6-7mm apart from axis, is 5-8mm along blade 3 length of the axis direction of cutter head 2;
Blade 3 is block structure, is straight line along blade 3 vertical sections of the axis direction of cutter head 2 and blade 3 away from the lateral surface intersection of cutter head 2 axis directions; Blade 3 begins to increase gradually near knife bar 1 one sides to blade 3 away from knife bar 1 one sides from blade 3 away from the distance between the axis of the lateral surface of cutter head 2 axis and cutter head 2; Blade 3 is the conical surface away from the lateral surface of cutter head 2 axis, and the angle of the axis direction of itself and cutter head 2 is 10 °.The whole boring cutter of described single-blade is simple in structure, the reliability height, and good rigidity, technique effect is good.
Carry out that employed technological parameter satisfies following requirement in the process of hole: revolution n=300r/min, amount of feeding f=0.05mm/r, cutting depth: ap=1.5mm.
The hardware device basis of present embodiment is the accurate digital control machining center.
Should use the W-Co kind carbide alloy little with the titanizing compatibility, that thermal conductivity good, intensity is higher during cutting.Institute uses the cutting tip material of cutter to be YD15.For increasing the cutter rigidity, the knife bar partial design becomes ellipticity, and minor axis radius is stretched out Gao's branch length sum with point of a knife and equated with major diameter, and the workpiece that satisfies that like this can be best is processed and the requirement of cutter rigidity.
Present embodiment adopts the hole of anti-boring processing method processing, and specification requirement is all qualified, and the stable processing quality in hole has improved the hole working (machining) efficiency.
Claims (3)
1. the processing method of the accurate profile stepped hole of a titanium alloy casing, the work piece material is cast titanium alloy, the trade mark is ZTC4; It is characterized in that: the processing method of the accurate profile stepped hole of described titanium alloy casing specifically is to adopt the accurate profile stepped hole of mode machining titanium alloy casing of anti-bore hole, select the whole boring cutter of corresponding specification for use according to the bottom diameter size, in earlier boring cutter off-centre being entered at the bottom of the hole during actual boring machining hole, fully by after the hole depth, the knife bar centre of gyration is got back to the bottom outlet center, carry out the processing of anti-bore hole more from inside to outside, until the degree of depth in hole and radial dimension boring be machined to qualified till.
2. according to the processing method of the accurate profile stepped hole of the described titanium alloy casing of claim 1, it is characterized in that: employed whole boring cutter is the whole boring cutter of single-blade in the processing method of the accurate profile stepped hole of described titanium alloy casing, it is made of knife bar (1), cutter head (2), blade (3), wherein: knife bar (1) and cutter head (2) are the shaft parts that coaxial fixed order connects as one, and blade (3) fixed and arranged is in the end of cutter head (2) away from that end of knife bar (1); It is characterized in that: the whole boring cutter total length of described single-blade 100mm, the axis farthest that cutter head (2) is departed from blade (3) installation site is 6-7mm apart from axis, is 5-8mm along blade (3) length of the axis direction of cutter head (2);
Blade (3) is block structure, is straight line along blade (3) vertical section of the axis direction of cutter head (2) and blade (3) away from the lateral surface intersection of cutter head (2) axis direction; Blade (3) begins to increase gradually near knife bar (1) one side to blade (3) away from knife bar (1) one side from blade (3) away from lateral surface and the distance between cutter head (2) axis of cutter head (2) axis; Blade (3) is the conical surface away from the lateral surface of cutter head (2) axis, and the angle of the axis direction of itself and cutter head (2) is 10 °.
3. according to the processing method of the accurate profile stepped hole of the described titanium alloy casing of claim 2, it is characterized in that: the accurate profile stepped hole of described titanium alloy casing is specially titanium alloy intermediary casing stator installing hole, it specifically satisfies following requirement: the aperture of the installing hole in the shoulder hole and requirement are Φ 15+0.1mm, and outer hole and the requirement of interior stepped hole are
Two sector hole axialities require to be Φ 0.1; Surface roughness requires to be Ra1.60 μ m;
Carry out that employed technological parameter satisfies following requirement in the process of hole: revolution n=300r/min, amount of feeding f=0.05mm/r, cutting depth: ap=1.5mm.
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| CN2012100486434A CN103286337A (en) | 2012-02-29 | 2012-02-29 | Method for processing stepped hole in precise molded surface of titanium alloy casing |
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| CN2012100486434A CN103286337A (en) | 2012-02-29 | 2012-02-29 | Method for processing stepped hole in precise molded surface of titanium alloy casing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104227062A (en) * | 2014-09-17 | 2014-12-24 | 东方电气(广州)重型机器有限公司 | Method for machining plurality of reverse stepped holes in plane |
| CN108405893A (en) * | 2018-03-01 | 2018-08-17 | 重庆建设汽车***股份有限公司 | A kind of cutter and its processing method for processing shoulder hole |
| CN108453271A (en) * | 2018-05-21 | 2018-08-28 | 成都爱乐达航空制造股份有限公司 | A kind of depth lumen pore process tool |
| CN109604942A (en) * | 2018-11-22 | 2019-04-12 | 成都飞机工业（集团）有限责任公司 | A kind of numerical-control processing method of aluminium alloy high-precision flat bottom hanging hole |
| CN117020283A (en) * | 2023-07-20 | 2023-11-10 | 珩星电子（连云港）股份有限公司 | PCD internal cooling reverse boring milling cutter and preparation process thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104227062A (en) * | 2014-09-17 | 2014-12-24 | 东方电气(广州)重型机器有限公司 | Method for machining plurality of reverse stepped holes in plane |
| CN108405893A (en) * | 2018-03-01 | 2018-08-17 | 重庆建设汽车***股份有限公司 | A kind of cutter and its processing method for processing shoulder hole |
| CN108453271A (en) * | 2018-05-21 | 2018-08-28 | 成都爱乐达航空制造股份有限公司 | A kind of depth lumen pore process tool |
| CN109604942A (en) * | 2018-11-22 | 2019-04-12 | 成都飞机工业（集团）有限责任公司 | A kind of numerical-control processing method of aluminium alloy high-precision flat bottom hanging hole |
| CN117020283A (en) * | 2023-07-20 | 2023-11-10 | 珩星电子（连云港）股份有限公司 | PCD internal cooling reverse boring milling cutter and preparation process thereof |
| CN117020283B (en) * | 2023-07-20 | 2024-03-08 | 珩星电子（连云港）股份有限公司 | PCD internal cooling reverse boring milling cutter and preparation process thereof |
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