CN101274380A - Inner screw thread milling technique - Google Patents
Inner screw thread milling technique Download PDFInfo
- Publication number
- CN101274380A CN101274380A CNA2007100866555A CN200710086655A CN101274380A CN 101274380 A CN101274380 A CN 101274380A CN A2007100866555 A CNA2007100866555 A CN A2007100866555A CN 200710086655 A CN200710086655 A CN 200710086655A CN 101274380 A CN101274380 A CN 101274380A
- Authority
- CN
- China
- Prior art keywords
- milling cutter
- screw thread
- thread
- bottom outlet
- internal thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003801 milling Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011295 pitch Substances 0.000 claims abstract description 42
- 238000003754 machining Methods 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
Landscapes
- Numerical Control (AREA)
Abstract
The invention relates to an internal thread milling technique which comprises the steps as follows: a drill bit is installed on a numerical control miller for processing an underport and then the drill bit is withdrawn to be replaced by an internal thread milling cutter provided with a plurality of teeth, the milling cutter is rotated and pushed into the L position of a cutting point at the bottom of the underport and then rotated by 360 degrees by surrounding the core of the port in a spiral line track in the underport to mill thread that is provided with a plurality of thread pitches on a side wall, then the milling cutter is drawn back to the core of the port along a radial direction and withdrawn for a height H to a direction leaving the underport along the radial direction of the underport so as to lead the point of the milling cutter to be completely tallied with the track points of the prior guide distance thread, thereby correctly connecting the prior and the post guide distances; the steps are repeated to mill the internal thread that meets the requirements for the depth of the thread according to the requirements, then the milling cutter is withdrawn and the processing is finished. The milling technique of the invention can complete a plurality of moving guide distances, process the internal threads with different depth at will according to the design requirement, guarantee correct connection between every two adjacent moving guide distances according to a precise calculation formula and improve processing precision and production efficiency.
Description
Technical field
The present invention relates to a kind of inner screw thread milling technique, specifically, relate to a kind of technology of utilizing CNC milling machine milling internal thread, belong to the Machining Technology field.
Background technology
Traditional female thread machining method is a method of utilizing common driller or lathe tapping, but under the restricted situation of product structure, just can not adopt this traditional processing method, but utilizes CNC milling machine and screw cutter machining internal thread.
Utilize the CNC milling machine milling thread to compare with the conventional threads processing mode, has very big advantage aspect machining accuracy, the working (machining) efficiency, and add the restriction that be not subjected to helicitic texture and thread rotary orientation man-hour, in addition, the durability of screw cutter is more than ten times even tens of times of regular tap, in the numerical control milling threaded process, the adjustment of double thread diameter dimension is very accurately convenient.
Present more employing be multiple tooth screw cutter, promptly during milling thread, the distance of a pitch of milling cutter operation just can process the screw thread with a plurality of pitch, the durability of production efficiency and cutter all has raising than single-point cutter.But the technology of utilizing the CNC milling machine machining internal thread at present is only limited in the superficial internal thread of working depth, promptly helical pitch just can be finished the processing of internal thread, for the darker internal thread of the degree of depth, a tool motion helical pitch can't be finished processing, just need a plurality of helical pitches of motion, and will exist the problem that how cutter is connected between two motion helical pitches this moment, and the solution of connection problem directly influences the machining accuracy of internal thread, yield rate and production efficiency.
Summary of the invention
Main purpose of the present invention is to address the above problem and is not enough, and a kind of inner screw thread milling technique that can finish a plurality of motion helical pitches is provided, and finishes the processing of deep thread.
Another object of the present invention is, the inner screw thread milling technique that can accurately be connected between a kind of every adjacent two motion helical pitches is provided, and realizes high manufacturing accuracy, high finished product rate and high efficiency.
For achieving the above object, described inner screw thread milling technique may further comprise the steps:
1) drill bit is installed on CNC milling machine, is being needed on the workpiece of machining internal thread, according to the dimensioned bottom outlet of internal thread to be processed;
2) from bottom outlet, withdraw from drill bit, change multiple tooth internal thread milling cutter;
3) milling cutter is rotated the roll setting point L that is advanced to described bottom outlet bottom, roll setting point L is positioned at the position that axially is deeper than internal thread starting point B along bottom outlet;
4) described milling cutter revolves three-sixth turn around the hole heart by spiral trajectory in bottom outlet, once mills out the screw thread with a plurality of pitch on the sidewall of bottom outlet;
5) described milling cutter is radially returned to the Kong Xinchu of described bottom outlet;
6) with described milling cutter along bottom outlet axially withdraw from a height H to the direction of leaving bottom outlet, the tracing point of the screw thread of the point of a knife of milling cutter and last helical pitch is fitted like a glove, thereby former and later two helical pitches accurately is connected;
7) described milling cutter revolves three-sixth turn around the hole heart by spiral trajectory in bottom outlet, mills out the screw thread with a plurality of pitch on the sidewall of bottom outlet once more;
8) described milling cutter is radially returned to the Kong Xinchu of described bottom outlet;
9) repeat above-mentioned the 6th, 7,8 steps, mill out as required and satisfy the internal thread that the depth of thread requires;
10) withdraw from milling cutter from the screwed hole that processes, internal thread machining is finished.
In above-mentioned steps 6, the height H that milling cutter withdraws from meets following expression formula, H=NP-P/4, wherein,
N is meant the number of screw thread, should be less than or equal to the number of the screw thread of a helical pitch, and P is meant the pitch of screw thread.
The degree of depth of the internal thread definite and to be processed of N value and the pitch quantity of milling cutter are relevant, just elder generation is according to the degree of depth of internal thread, calculate the number of the screw thread that need mill out, again according to the pitch quantity of milling cutter calculate to finish screw thread processing at least needs move several helical pitches, the numerical value of N when determining at every turn to withdraw from milling cutter at last.
The height H that the process said method calculates, the point of a knife of cutter is accurately cut when entering next helical pitch, the screw thread between two whenever adjacent motion helical pitches accurately is connected, guarantee the integrality of screw thread, realize high manufacturing accuracy, high finished product rate and high efficiency.
In above-mentioned steps 3, the roll setting point L of milling cutter meets following expression formula apart from the axial distance J of internal thread starting point B, J=P/8, wherein, P is meant the pitch of screw thread, cutter can be guaranteed like this after rotatablely moving, the position of internal thread starting point B to be processed can be accurately dropped on by spiral trajectory.
In above-mentioned steps 3, the position of the roll setting point L of milling cutter can determine arbitrarily, but have only radial coordinate as roll setting point L (X, when Y) meeting following expression formula,
X=(D
0-D)/4, Y=(D
0-D)/4, and wherein, D
0Be meant the diameter of thread, D is meant tool diameter.
The movement locus of milling cutter is the most reasonable, and the distance of tool motion is short, the working (machining) efficiency height.
Content to sum up, inner screw thread milling technique of the present invention advantage compared with prior art is:
(1) can finish the inner screw thread milling technique of a plurality of motion helical pitches, by the different internal thread of any working depth of designing requirement.
(2) by exact calculating formula, guarantee can accurately be connected between every two adjacent motion helical pitches, realize high manufacturing accuracy, high finished product rate and high efficiency.
Description of drawings
Fig. 1 milling cutter radial motion of the present invention trajectory diagram;
Fig. 2 cutter spindle of the present invention is to movement locus figure.
The specific embodiment
As depicted in figs. 1 and 2, with specific embodiment processing step of the present invention is described:
With machining screw is that the M30 internal thread of 50mm is an example deeply,
1) drill bit is installed on CNC milling machine, is being needed on the workpiece of machining internal thread, according to the dimensioned bottom outlet of internal thread to be processed.
According to manual of standards, the M30 bottom diameter is ￠ 26.631～￠ 26.211mm, selects the drill bit machined bottom of ￠ 26.30mm for use, and the rotating speed of milling machine is selected in 200r/min.General when adopting common drill bit, the processing rotating speed is selected in 200-300r/min, and when adopting the U-shaped drill bit, the processing rotating speed then is selected in 600-700r/min.
When machined bottom, guarantee the circularity in hole and the perpendicularity of axis and end face, could satisfy the middle positivity of screw thread like this during thread milling, do not produce the deflection of thread crest.
2) from bottom outlet, withdraw from drill bit, change multiple tooth internal thread milling cutter, multiple tooth internal thread milling cutter selection standard blade, the pitch quantity of milling cutter is 5, and the diameter D of cutter is 20.6mm, and pitch P is 3.5mm.
3) because the roll setting point L of milling cutter meets following expression formula apart from the axial distance J of internal thread starting point, J=P/8, the numerical value that draws J as calculated is 0.4375mm.
Again because the radial coordinate of the roll setting point L of milling cutter (X Y) meets following expression formula,
X=(D
0-D)/4, Y=(D
0-D)/4, drawing as calculated, the numerical value of X is 2.35mm, the numerical value of Y also is 2.35mm.
Milling cutter rotation is advanced to the position of the roll setting point L that aforementioned calculation draws.
4) described milling cutter revolves three-sixth turn around the hole heart by spiral trajectory in bottom outlet, once mills out the screw thread with 5 pitch on the sidewall of bottom outlet.
5) described milling cutter is radially returned to the Kong Xinchu of described bottom outlet.
6) with described milling cutter along bottom outlet axially withdraw from a height H to the direction of leaving bottom outlet, the tracing point of the screw thread of the point of a knife of milling cutter and last helical pitch is fitted like a glove, thereby former and later two helical pitches accurately is connected.
Processing need be processed the screw thread of 14 pitch for the internal thread of 50mm deeply, the number of threads that each helical pitch mills out is 5, so cutter need move the processing that two helical pitches are finished screw thread, like this, N is with regard to peek value 4, just milling cutter is withdrawed from the distance of about 4 pitch, according to expression formula H=NP-P/4, the numerical value that calculates the height H that milling cutter need be mentioned between two helical pitches is 13.125mm.
7) described milling cutter revolves three-sixth turn around the hole heart by spiral trajectory in bottom outlet, mills out the screw thread with 5 pitch on the sidewall of bottom outlet once more, so just mills out the screw thread of 14 pitch altogether.
8) described milling cutter is radially returned to the Kong Xinchu of described bottom outlet.
10) withdraw from milling cutter from the screwed hole that processes, internal thread machining is finished.
As mentioned above, given in conjunction with the accompanying drawings and embodiments scheme content can derive the similar techniques scheme.In every case be the content that does not break away from technical solution of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical solution of the present invention according to technical spirit of the present invention.
Claims (4)
1. inner screw thread milling technique, it is characterized in that: this technology may further comprise the steps,
1) drill bit is installed on CNC milling machine, is being needed on the workpiece of machining internal thread, according to the dimensioned bottom outlet of internal thread to be processed;
2) from bottom outlet, withdraw from drill bit, change multiple tooth internal thread milling cutter;
3) milling cutter is rotated the roll setting point (L) that is advanced to described bottom outlet bottom, roll setting point (L) is positioned at the position that axially is deeper than internal thread starting point (B) along bottom outlet;
4) described milling cutter revolves three-sixth turn around the hole heart by spiral trajectory in bottom outlet, once mills out the screw thread with a plurality of pitch on the sidewall of bottom outlet;
5) described milling cutter is radially returned to the Kong Xinchu of described bottom outlet;
6) with described milling cutter along bottom outlet axially withdraw from a height (H) to the direction of leaving bottom outlet, the tracing point of the screw thread of the point of a knife of milling cutter and last helical pitch is fitted like a glove, thereby former and later two helical pitches accurately is connected;
7) described milling cutter revolves three-sixth turn around the hole heart by spiral trajectory in bottom outlet, mills out the screw thread with a plurality of pitch on the sidewall of bottom outlet once more;
8) described milling cutter is radially returned to the Kong Xinchu of described bottom outlet;
9) repeat above-mentioned the 6th, 7,8 steps, mill out as required and satisfy the internal thread that the depth of thread requires;
10) withdraw from milling cutter from the screwed hole that processes, internal thread machining is finished.
2. inner screw thread milling technique according to claim 1 is characterized in that: in above-mentioned steps 6, the height that milling cutter withdraws from (H) meets following expression formula,
H=NP-P/4, wherein,
N is meant the number of screw thread, should be less than or equal to the number of the screw thread of a helical pitch;
P is meant the pitch of screw thread.
3. inner screw thread milling technique according to claim 1 and 2 is characterized in that: in above-mentioned steps 3, the roll setting of milling cutter point (L) meets following expression formula apart from the axial distance (J) of internal thread starting point (B),
J=P/8, wherein, P is meant the pitch of screw thread.
4. inner screw thread milling technique according to claim 3 is characterized in that: in above-mentioned steps 3, the radial coordinate of the roll setting of milling cutter point (L) (X Y) meets following expression formula,
X=(D
0-D)/4, Y=(D
0-D)/4, wherein,
D
0Be meant the diameter of thread, D is meant tool diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100866555A CN101274380A (en) | 2007-03-28 | 2007-03-28 | Inner screw thread milling technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100866555A CN101274380A (en) | 2007-03-28 | 2007-03-28 | Inner screw thread milling technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101274380A true CN101274380A (en) | 2008-10-01 |
Family
ID=39994466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100866555A Pending CN101274380A (en) | 2007-03-28 | 2007-03-28 | Inner screw thread milling technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101274380A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372689A (en) * | 2013-07-09 | 2013-10-30 | 缙云县汽缸体厂 | Duplex head internal thread miller |
| CN104475879A (en) * | 2014-10-30 | 2015-04-01 | 康徐红 | Processing technology adopting special starting point for processing internal thread |
| CN104668671A (en) * | 2013-12-02 | 2015-06-03 | 江西昌河航空工业有限公司 | Operational method for fully and automatically processing M8*1 inner threads through numerical milling machine tool |
| CN106808032A (en) * | 2017-03-01 | 2017-06-09 | 湘潭大学 | A Method of Reducing Interference in Thread Milling |
| CN108098277A (en) * | 2017-12-29 | 2018-06-01 | 德阳天和机械制造有限责任公司 | A kind of method using cold screw cutter processing screw thread in diamond |
| CN108747203A (en) * | 2018-06-06 | 2018-11-06 | 宁波江丰电子材料股份有限公司 | A kind of powdered metallurgical material processing method and numerical control machining center |
| CN108817563A (en) * | 2018-09-07 | 2018-11-16 | 湘潭大学 | A kind of cylindrical external thread helical milling incision track optimizing method |
| CN108817562A (en) * | 2018-07-05 | 2018-11-16 | 湘潭大学 | Threaded hole spiral cuts track optimizing method and device and hole processing equipment |
| CN108890048A (en) * | 2018-07-23 | 2018-11-27 | 湘潭大学 | Spiral milling of screw-thread processing method and device |
| CN108971669A (en) * | 2018-07-26 | 2018-12-11 | 湘潭大学 | Track optimizing method is cut in a kind of helical milling of tapered tread hole |
| CN109551064A (en) * | 2018-12-24 | 2019-04-02 | 内蒙古北方重工业集团有限公司 | The broach-milling processing method of the nonstandard dextrorotation internal screw thread of major diameter |
| CN109926665A (en) * | 2017-12-18 | 2019-06-25 | Pcm维伦公司 | Rotary milling device |
| CN111347108A (en) * | 2018-12-24 | 2020-06-30 | 沈阳理工大学 | Large-diameter non-standard right-handed internal thread broaching and milling cutter system |
-
2007
- 2007-03-28 CN CNA2007100866555A patent/CN101274380A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372689A (en) * | 2013-07-09 | 2013-10-30 | 缙云县汽缸体厂 | Duplex head internal thread miller |
| CN103372689B (en) * | 2013-07-09 | 2015-11-25 | 缙云县汽缸体厂 | Duplex head internal thread miller |
| CN104668671A (en) * | 2013-12-02 | 2015-06-03 | 江西昌河航空工业有限公司 | Operational method for fully and automatically processing M8*1 inner threads through numerical milling machine tool |
| CN104475879A (en) * | 2014-10-30 | 2015-04-01 | 康徐红 | Processing technology adopting special starting point for processing internal thread |
| CN106808032A (en) * | 2017-03-01 | 2017-06-09 | 湘潭大学 | A Method of Reducing Interference in Thread Milling |
| CN109926665B (en) * | 2017-12-18 | 2023-05-23 | Pcm精密仪器公司 | Rotary milling device |
| CN109926665A (en) * | 2017-12-18 | 2019-06-25 | Pcm维伦公司 | Rotary milling device |
| CN108098277B (en) * | 2017-12-29 | 2019-05-31 | 德阳天和机械制造有限责任公司 | A method of screw thread is processed using screw cutter cold in diamond |
| CN108098277A (en) * | 2017-12-29 | 2018-06-01 | 德阳天和机械制造有限责任公司 | A kind of method using cold screw cutter processing screw thread in diamond |
| CN108747203A (en) * | 2018-06-06 | 2018-11-06 | 宁波江丰电子材料股份有限公司 | A kind of powdered metallurgical material processing method and numerical control machining center |
| CN108817562A (en) * | 2018-07-05 | 2018-11-16 | 湘潭大学 | Threaded hole spiral cuts track optimizing method and device and hole processing equipment |
| CN108817562B (en) * | 2018-07-05 | 2020-10-16 | 湘潭大学 | Threaded hole spiral cut-in track optimization method and device and threaded hole machining equipment |
| CN108890048A (en) * | 2018-07-23 | 2018-11-27 | 湘潭大学 | Spiral milling of screw-thread processing method and device |
| CN108971669A (en) * | 2018-07-26 | 2018-12-11 | 湘潭大学 | Track optimizing method is cut in a kind of helical milling of tapered tread hole |
| CN108971669B (en) * | 2018-07-26 | 2020-05-08 | 湘潭大学 | A method for optimizing the entry path of helical milling of tapered threaded holes |
| CN108817563A (en) * | 2018-09-07 | 2018-11-16 | 湘潭大学 | A kind of cylindrical external thread helical milling incision track optimizing method |
| CN108817563B (en) * | 2018-09-07 | 2020-05-15 | 湘潭大学 | Optimization method for helical milling cut-in trajectory of cylindrical external thread |
| CN109551064A (en) * | 2018-12-24 | 2019-04-02 | 内蒙古北方重工业集团有限公司 | The broach-milling processing method of the nonstandard dextrorotation internal screw thread of major diameter |
| CN111347108A (en) * | 2018-12-24 | 2020-06-30 | 沈阳理工大学 | Large-diameter non-standard right-handed internal thread broaching and milling cutter system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101274380A (en) | Inner screw thread milling technique | |
| CN102825315B (en) | In-groove type helical milling method | |
| CN101879636B (en) | Method for machining a fence drum rope groove by using numerical control machine | |
| CN104475843B (en) | A kind of processing method of annular class casing radially narrow slot | |
| CN207013995U (en) | New and effective piston pin hole process equipment | |
| CN203171033U (en) | Multi-stage composite chamfering forming drill | |
| CN115847011A (en) | Method for processing deep and narrow groove on aluminum-magnesium casing | |
| CN102756185A (en) | Thread chaser for cutting double-line pipe threads | |
| CN112008125A (en) | Automatic milling method for high-precision blind hole | |
| CN102303219B (en) | Machining method for worm tooth profile of cutter shaft of large gear shaping machine | |
| CN104267669B (en) | The casing cannelure milling roughing track automatic generation method of feature based | |
| CN103203491A (en) | Method for processing external spiral slot with large screw pitch by numerically controlled lathe and process device | |
| CN112091292B (en) | Allowance hole reaming method | |
| CN203418124U (en) | Cross oil groove machining tool | |
| CN103624653B (en) | Processing method for forming helical groove of twist drill | |
| US20220331894A1 (en) | Method and tool for creating a through-thread | |
| CN105642918B (en) | A kind of large scale ship spiral rope groove processing method | |
| RU2351441C2 (en) | Method of detail treatment | |
| CN104199385B (en) | Milling Machining track automatic generation method is inserted in the runner of blisk roughing of feature based | |
| CN208357955U (en) | A kind of cut tap | |
| CN111659908A (en) | Turning-based cylindrical surface reticulate pattern machining method and system | |
| CN102500845A (en) | Cutter and method for machining inside tapered thread | |
| CN108971669B (en) | A method for optimizing the entry path of helical milling of tapered threaded holes | |
| CN106735398B (en) | For milling endoporus and the numerically-controlled machine tool and processing method of outer circle | |
| CN108890048B (en) | Screw thread spiral milling method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20081001 |