CN103286389A - Device and method for machining high-speed turning multi-head large-lead deep-groove-type external threads - Google Patents

Device and method for machining high-speed turning multi-head large-lead deep-groove-type external threads Download PDF

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CN103286389A
CN103286389A CN2013102247555A CN201310224755A CN103286389A CN 103286389 A CN103286389 A CN 103286389A CN 2013102247555 A CN2013102247555 A CN 2013102247555A CN 201310224755 A CN201310224755 A CN 201310224755A CN 103286389 A CN103286389 A CN 103286389A
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cutter
turning
thread
speed
cutting
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CN103286389B (en
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徐楠
姚连波
王钟起
吴艳青
张世军
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CNNC Tianjin Technology Development Co Ltd
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CNNC Tianjin Technology Development Co Ltd
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Abstract

The invention discloses a device and method for machining high-speed turning multi-head large-lead deep-groove-type external threads. The device comprises a hollow cutter body. The cutter body is composed of a cutter installation part and a clamping part. A square hole and a screw hole communicated with each other are formed in the clamping part, wherein the square hole is used for clamping a cutter and the screw hole is used for fixing the cutter. The device further comprises a tip with end teeth. The tip with the end teeth comprises a hollow tip body. A fixing screw hole is formed in one end of the tip body. A positioning circular protrusion is formed at the other end of the tip body, wherein the diameter of the positioning circular protrusion is smaller than that of the tip body. The end teeth which are evenly distributed at the circumference are formed at the portion, arranged on the periphery of the positioning circular protrusion, of the tip body. The method comprises the following steps: (i) beginning, (ii) roughly turning an external circle, (iii) roughly turning the threads, (iv) half-finely turning the threads, (v) finely turning the threads, (vi) finely turning the external circle and (vii) finishing. According to the device and method for machining the high-speed turning multi-head large-lead deep-groove-type external threads, machining efficiency and the spiral surface quality of the multi-head deep-groove-type threads are greatly improved.

Description

The high-speed turning bull externally threaded processing unit (plant) of big helical pitch shallow/deep groove type and processing method
Technical field
The invention belongs to the externally threaded processing unit (plant) of a kind of part and processing method, be specifically related to a kind of high-speed turning bull externally threaded processing unit (plant) of big helical pitch shallow/deep groove type and processing method.
Background technology
In industrial production, the big externally threaded working (machining) efficiency of helical pitch (greater than 30mm) deep trouth (greater than 3mm) type of bull (more than three) is the difficult point in the processing, because the spiral fluted helical pitch is bigger, the feed speed of screw cutting was big when the speed of mainshaft was higher, and the maximum feed speed of general numerically controlled lathe can not satisfy the requirement of its roughing feed speed.General helicla flute turning process is to utilize a thread forming cutter multitool to cut separately by the lower speed of mainshaft on numerically controlled lathe to form.So working (machining) efficiency is very low.At present, the more advanced high-efficiency method of threading is that whirlwind mills, but mainly is the cyclone milling head that is used on the engine lathe, and the numerical control whirlwind mills equipment seldom, and technology is immature.
Summary of the invention
The present invention proposes in order to overcome the shortcoming that exists in the prior art, and its objective is provides a kind of high-speed turning bull externally threaded processing unit (plant) of big helical pitch shallow/deep groove type and processing method.
Technical scheme of the present invention is: the externally threaded processing unit (plant) of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull, the cutter hub that comprises intermediate hollow, cutter hub is made up of cutter installation portion and clamping portion, form the square hole of the clamping cutter that interconnects and the screw of fixed cutting tool in clamping portion, the lead angle that the center line of square hole and vertical line form is the α angle.
Also comprise the band edge peak, the band edge peak comprises the top body of hollow, end at top body forms fixing threaded hole, the other end at top body forms diameter less than the setting circle projection of the diameter of top body, form the end tooth of a circumference uniform distribution at the top body of the outside of setting circle projection, form taper hole in the reducing junction of top intracoelomic cavity.
The angle of described lead angle α is calculated according to following formula:
Tan α=
Figure 399131DEST_PATH_IMAGE001
Wherein α is lead angle, and P is helical pitch, and d is the pitch diameter of thread;
The coning angle of described taper hole is 60 degree.
The externally threaded processing method of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull may further comprise the steps:
(i) beginning
The mode clamping that the blank workpiece is held out against with two ends is to numerically controlled lathe, and it is top that machine tool three-jaw chuck clamps plum blossom, and band edge peak and lathe are top to be connected and fixed, (S1);
(ⅱ) rough turn cylindrical
Outer scale (S2) with regular turning tool car unhairing base workpiece;
(ⅲ) rough threading
Utilize the rough turn multiple thread of carbide alloy thread forming knife up speed turning, cutting speed is 200r/min, cutting depth is: the every cutter of the first seven time cutting is 0.3mm deeply, the back is cut every cutter for six times and is 0.2mm deeply, improve working (machining) efficiency, and leave certain finish turning allowance (S3) for the diamond thread shaving tool;
(ⅳ) half finish turning screw thread
Utilize diamond thread moulding cutter half finish turning multiple thread, cutting speed is 200r/min, and cutting depth is: four times are cut every cutter is 0.15mm deeply, improves helicla flute surface quality (S4);
(ⅴ finish turning screw thread
Utilize diamond thread moulding cutter finish turning multiple thread, cutting speed 200r/min, cutting depth is: the every cutter of preceding cutting at one time is 0.10mm deeply, and the every cutter of back secondary cutting is 0.05mm deeply, further improves helicla flute surface quality (S5);
(ⅵ) finish turning cylindrical
With regular turning tool finish turning excircle of workpiece, meet the requirements of dimensional accuracy (S6);
(ⅶ) finish
After work is finished, unload the workpiece (S7) that processes.
Described carbide alloy thread forming cutter and diamond thread moulding cutter profile and measure-alike only are the material differences of cutter head, and the tool tip material of carbide alloy thread forming cutter is carbide alloy, and the tool tip material of diamond thread moulding cutter is diamond.
The present invention puies forward processing unit (plant) and the method that adopts thick, smart two continuous turning multiple threads of the tool changing of threading tool in high-speed turning disorderly not detain, and increases substantially the working (machining) efficiency of bull shallow/deep groove type screw thread, has improved the surface quality of spiral.
Description of drawings
Fig. 1 is the front view of helicla flute cutter hub of the present invention;
Fig. 2 is along the profile of A-A line among Fig. 1;
Fig. 3 is along the profile of B-B line among Fig. 2;
Fig. 4 is installation way schematic diagram of the present invention;
Fig. 5 is band edge peak structure chart of the present invention;
Fig. 6 is the programme diagram of processing method of the present invention.
Wherein:
1 cutter hub, 2 cutter installation portions
3 clamping portions, 4 square holes
5 screws, 6 band edge peaks
7 plum blossoms top 8 top bodies
9 fixing threaded holes, 10 setting circle projectioies
11 end teeth, 12 taper holes
13 blank workpiece.
The specific embodiment
Below, in conjunction with the accompanying drawings and embodiments the high-speed turning bull of the present invention externally threaded processing unit (plant) of big helical pitch shallow/deep groove type and processing method are elaborated:
Shown in Fig. 1~5, the externally threaded processing unit (plant) of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull, the cutter hub 1 that comprises intermediate hollow, cutter hub 1 is made up of cutter installation portion 2 and clamping portion 3, process the square hole 4 of the clamping cutter that interconnects and the screw 5 of fixed cutting tool in clamping portion 3, the lead angle that the center line of square hole 4 and vertical line form is the α angle, and the number of degrees at α angle can calculate according to following formula:
Tan α=
Figure 178869DEST_PATH_IMAGE001
Wherein α is lead angle, and P is helical pitch, and d is the pitch diameter of thread;
Device of the present invention also comprises band edge peak 6, band edge peak 6 comprises the top body 8 of hollow, end at top body 8 forms fixing threaded hole 9, form diameter less than the setting circle projection 10 of the diameter of top body 8 at the other end of top body 8, the top body 8 in the outside of setting circle projection 10 forms a circle end tooth 11.Form the taper hole 12 of 60 degree in the reducing junction of top body 8 inner chambers.
As shown in Figure 6, the externally threaded processing method of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull may further comprise the steps:
(i) beginning
Blank workpiece 13 is pressed the mode clamping of Fig. 4, and it is top 7 that namely machine tool three-jaw chuck clamps plum blossom, and band edge peak 6 is connected and fixed with lathe is top, the mode clamping (S1) to numerically controlled lathe that blank is held out against with two ends;
(ⅱ) rough turn cylindrical
At first, use the outer scale (S2) of regular turning tool car unhairing base workpiece 13;
(ⅲ) rough threading
Then, utilize the rough turn multiple thread of carbide alloy thread forming cutter, high-speed turning such as turning speed are S=200r/min, cutting depth is: the every cutter of the first seven cutter is 0.3mm deeply, six cuttves every cutter in back is 0.2mm deeply, improve working (machining) efficiency, and leave certain finish turning allowance (S3) for the diamond thread shaving tool;
(ⅳ) half finish turning screw thread
Then, utilize diamond thread moulding cutter half finish turning screw thread, the speed of cutting is S=200r/min, and cutting depth is: the every cutter of four blade is 0.15mm deeply, improves helicla flute surface quality (S4);
(ⅴ) finish turning screw thread
Then, utilize diamond thread moulding cutter finish turning screw thread, the speed of cutting is S=200r/min, and cutting depth is: the every cutter of last cutter is 0.10mm deeply, and two cuttves every cutter in back is 0.05mm deeply, further improves helicla flute surface quality (S5);
(ⅵ) finish turning cylindrical
Then, remove excircle of workpiece with the regular turning tool finish turning, meet the requirements of dimensional accuracy (S6);
(ⅶ) finish
After work is finished, unload the workpiece (S7) that processes.
The present invention puies forward processing unit (plant) and the method that adopts thick, smart two continuous turning multiple threads of the tool changing of threading tool in high-speed turning disorderly not detain, and increases substantially the working (machining) efficiency of bull shallow/deep groove type screw thread, has improved the surface quality of spiral.

Claims (5)

1. externally threaded processing unit (plant) of the big helical pitch shallow/deep groove type of high-speed turning bull, the cutter hub (1) that comprises intermediate hollow, it is characterized in that: described cutter hub (1) is made up of cutter installation portion (2) and clamping portion (3), form the square hole (4) of the clamping cutter that interconnects and the screw (5) of fixed cutting tool in clamping portion (3), the lead angle that the center line of square hole (4) and vertical line form is the α angle, also comprise band edge peak (6), band edge peak (6) comprises the top body (8) of hollow, end at top body (8) forms fixing threaded hole (9), the other end at top body (8) forms diameter less than the setting circle projection (10) of the diameter of top body (8), form the end tooth (11) of a circumference uniform distribution at the top body (8) of the outside of setting circle projection (10), form taper hole (12) in the reducing junction of top body (8) inner chamber.
2. the externally threaded processing unit (plant) of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull according to claim 1, it is characterized in that: the angle of described lead angle α is calculated according to following formula:
Tan α=
Figure 2013102247555100001DEST_PATH_IMAGE001
Wherein α is lead angle, and P is helical pitch, and d is the pitch diameter of thread.
3. the externally threaded processing unit (plant) of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull according to claim 1 is characterized in that: the coning angle of described taper hole (12) is 60 degree.
4. according to the processing method of the big helical pitch shallow/deep groove type of the described a kind of high-speed turning bull of claim 1 external screw thread processing unit (plant), it is characterized in that: may further comprise the steps:
(i) beginning
The mode clamping that blank workpiece (13) is held out against with two ends is to numerically controlled lathe, and machine tool three-jaw chuck clamps plum blossom top (7), and band edge peak (6) is connected and fixed with lathe is top, (S1);
(ⅱ) rough turn cylindrical
At first, use the outer scale (S2) of regular turning tool car unhairing base workpiece (13);
(ⅲ) rough threading
Then, utilize the rough turn multiple thread of carbide alloy thread forming knife up speed turning, cutting speed is 200r/min, cutting depth is: the every cutter of the first seven time cutting is 0.3mm deeply, the back is cut every cutter for six times and is 0.2mm deeply, improve working (machining) efficiency, and leave certain finish turning allowance (S3) for the diamond thread shaving tool;
(ⅳ) half finish turning screw thread
Then, utilize diamond thread moulding cutter half finish turning multiple thread, cutting speed is 200r/min, and cutting depth is: four times are cut every cutter is 0.15mm deeply, improves helicla flute surface quality (S4);
(ⅴ finish turning screw thread
Then, utilize diamond thread moulding cutter finish turning multiple thread, cutting speed 200r/min, cutting depth is: the every cutter of preceding cutting at one time is 0.10mm deeply, and the every cutter of back secondary cutting is 0.05mm deeply, further improves helicla flute surface quality (S5);
(ⅵ) finish turning cylindrical
At last, with regular turning tool finish turning excircle of workpiece, meet the requirements of dimensional accuracy (S6);
(ⅶ) finish
After work is finished, unload the workpiece (S7) that processes.
5. the externally threaded processing method of the big helical pitch shallow/deep groove type of a kind of high-speed turning bull according to claim 4, it is characterized in that: described carbide alloy thread forming cutter and diamond thread moulding cutter profile and measure-alike, it only is the material difference of cutter head, the tool tip material of carbide alloy thread forming cutter is carbide alloy, and the tool tip material of diamond thread moulding cutter is diamond.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104690605A (en) * 2013-12-04 2015-06-10 铜陵市永生机电制造有限责任公司 Tool setting method for turning multiple threads
CN109719462A (en) * 2018-11-16 2019-05-07 湖北江山重工有限责任公司 A kind of nonmetallic large pitch trapezoidal thread rough mills smart car combined machining method
CN109732103A (en) * 2018-11-16 2019-05-10 湖北江山重工有限责任公司 The method for processing zero lead helix Variable Pitch Screw Bar based on centre numerically controlled lathe
CN111299964A (en) * 2020-03-30 2020-06-19 共享智能装备有限公司 Large-diameter thread machining method
CN113245792A (en) * 2021-05-24 2021-08-13 大庆市龙兴石油机械有限公司 Production process of oil pipe product

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CN102581391A (en) * 2012-02-29 2012-07-18 中国铁道科学研究院机车车辆研究所 Machining method for multi-step threads of disc brake caliper for rail transit vehicle

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104690605A (en) * 2013-12-04 2015-06-10 铜陵市永生机电制造有限责任公司 Tool setting method for turning multiple threads
CN109719462A (en) * 2018-11-16 2019-05-07 湖北江山重工有限责任公司 A kind of nonmetallic large pitch trapezoidal thread rough mills smart car combined machining method
CN109732103A (en) * 2018-11-16 2019-05-10 湖北江山重工有限责任公司 The method for processing zero lead helix Variable Pitch Screw Bar based on centre numerically controlled lathe
CN111299964A (en) * 2020-03-30 2020-06-19 共享智能装备有限公司 Large-diameter thread machining method
CN111299964B (en) * 2020-03-30 2022-02-18 共享装备股份有限公司 Large-diameter thread machining method
CN113245792A (en) * 2021-05-24 2021-08-13 大庆市龙兴石油机械有限公司 Production process of oil pipe product

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