CN112475403A - Method for machining inclined hole of rocker arm of coal mining machine by utilizing spatial rotation of coordinate system - Google Patents
Method for machining inclined hole of rocker arm of coal mining machine by utilizing spatial rotation of coordinate system Download PDFInfo
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- CN112475403A CN112475403A CN202011354038.0A CN202011354038A CN112475403A CN 112475403 A CN112475403 A CN 112475403A CN 202011354038 A CN202011354038 A CN 202011354038A CN 112475403 A CN112475403 A CN 112475403A
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- rocker arm
- axis
- inclined hole
- coal mining
- mining machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
Abstract
The invention discloses a method for processing an inclined hole of a rocker arm of a coal mining machine by utilizing spatial rotation of a coordinate system, which comprises the following steps: clamping a rocker arm of a coal mining machine on a working table of a numerical control boring machine, and ensuring that the end surface of the rocker arm head of the rocker arm of the coal mining machine is parallel to the working table; the main shaft of the numerical control boring machine clamps the right-angle milling head and programs the right-angle milling head to rotate a machining coordinate shaft system, wherein the rotation of the machining coordinate shaft system comprises the following steps: fixing the Y axis, and rotating the X axis plane and the Z axis plane by 90 degrees; fixing the X axis rotated in the first step, and rotating Y axis and Z axis planes according to the angle between the inclined hole and the end face of the rocker arm head; performing inclined hole machining on a rocker arm head of the rocker arm of the coal mining machine by feeding in the Z-axis direction; and (3) rotating the processing table board by taking the circle center of the distribution circle of the rocker arm head of the inclined hole to be processed as an axis, and feeding in sequence at the distribution angle of each inclined hole to be processed to complete the processing of each inclined hole. The invention can obviously improve the processing efficiency and has reliable processing size and safe operation.
Description
Technical Field
The invention relates to an inclined hole machining method, in particular to a method for machining an inclined hole of a rocker arm of a coal mining machine by utilizing spatial rotation of a coordinate system.
Background
In order to improve the service performance of the rocker arm product of the coal mining machine and prolong the service life of parts, a circle of straight holes at the head part of the rocker arm are changed into inclined holes with angles, so that the service performance of the product is improved, but the machining efficiency of the inclined holes is lower. The inclined hole on the rocker arm head usually needs to be machined on the numerical control gantry by adopting a universal angle milling head due to the particularity of the hole, but the numerical control gantry is high in equipment failure rate and low in numerical control degree, and the generated failure needs to be repaired within more than two weeks, so that the machining efficiency is difficult to guarantee. Meanwhile, as the angle milling head is manual, the angle milling head needs to be manually rotated and calibrated every time when changing an angle, so that time and labor are wasted. The method also adopts a boring machine for processing, a crane is used for hoisting the rocker arm to form an angle for processing, a processing angle of the crane is changed when a hole is processed, but the angle is not easy to control by crane hoisting, so that the drawing size cannot be ensured, and the hoisting processing still has a safety problem.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for machining the inclined hole of the rocker arm of the coal mining machine by utilizing the spatial rotation of a coordinate system, solve the problem of low machining efficiency of a numerical control gantry, realize the machining by adopting a non-hoisting machining mode on a boring machine and improve the safety and the dimensional precision.
The technical scheme of the invention is as follows: a method for processing inclined holes of a rocker arm of a coal mining machine by utilizing space rotation of a coordinate system comprises the following steps: clamping a rocker arm of a coal mining machine on a working table of a numerical control boring machine, and ensuring that the end surface of the rocker arm head of the rocker arm of the coal mining machine is parallel to the working table; the main shaft of the numerical control boring machine clamps the right-angle milling head and programs the right-angle milling head to rotate a machining coordinate shaft system, wherein the rotation of the machining coordinate shaft system comprises the following steps: fixing the Y axis, and rotating the X axis plane and the Z axis plane by 90 degrees; fixing the X axis rotated in the first step, and rotating Y axis and Z axis planes according to the angle between the inclined hole and the end face of the rocker arm head; performing inclined hole machining on a rocker arm head of the rocker arm of the coal mining machine by feeding in the Z-axis direction; and (3) rotating the processing table board by taking the circle center of the distribution circle of the rocker arm head of the inclined hole to be processed as an axis, and feeding in sequence at the distribution angle of each inclined hole to be processed to complete the processing of each inclined hole.
And further, after the inclined hole to be machined exceeds the stroke when the distribution circle center of the rocker arm head is taken as the axis to rotate the machining table surface, carrying out mirror image processing on the angle of the right-angle milling head.
Further, the mirror image processing is to fix the Y axis after the rotation of the second step and rotate the X axis and the Z axis plane by 180 degrees.
Further, the mirror image processing is to fix the Y axis after the rotation of the step one, rotate the X axis and the Z axis plane by 180 degrees, and then perform the step two.
Compared with the prior art, the invention has the advantages that:
the rocker arm of the coal mining machine is simply clamped without any angle tool; the universal angle milling head is not needed, the numerical control boring machine can process the workpiece with the right angle milling head, and the operation is simple and safe; after the spatial rotation of the coordinate system is carried out, the cutting shaft still keeps the Z-axis direction all the time, the machining program can be compiled according to the normal coordinate system, and no adaptive obstacle exists for machining operators; the processing time of the inclined hole of the rocker arm of the coal mining machine is shortened from about 360 minutes to about 178.8 minutes per piece, and the efficiency is improved by 50.3 percent.
Drawings
FIG. 1 is a partial schematic view of a rocker arm head.
Fig. 2 is a schematic cross-sectional view of fig. 1.
FIG. 3 is a schematic view of clamping of a rocker arm on a workbench surface of a numerical control boring machine.
Fig. 4 is a schematic diagram of a coordinate system rotation process.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.
The structure positions of the inclined holes of the rocker arm of the coal mining machine are shown in fig. 1 and fig. 2, the inclined holes 11 at the head part of the shell of the rocker arm 1 of the coal mining machine are distributed in a circumferential shape, and the inclined holes 11 and the end surface of the rocker arm head also form a certain angle (45 degrees in the embodiment), which requires that equipment for processing the inclined holes has two rotating shafts, and the processing of the inclined holes is realized by the rotation of a working table and the rotation of a right-angle milling head on a numerical control boring machine. The numerical control boring machine is selected from a common device CK6816 for a rocker arm of a coal mining machine.
Referring to fig. 3, firstly, the rocker arm 1 of the coal mining machine needs to be clamped on a numerical control boring machine. The length direction of the rocker arm 1 of the coal mining machine is longer, and inclined holes 11 to be processed are arranged in a circle, so the rotating angle (B axis) range of the working table surface 2 and the interference between the formation of each axis and the pressing plate in the processing process are noticed during clamping. The working table surface 2 is provided with a cushion block 3 with equal height, so that the end surface of the rocker arm head of the rocker arm 1 of the coal mining machine is parallel to the working table surface 2. In order to ensure that the rocker arm 1 of the coal mining machine does not loose in the machining process, a long pressing plate 4 is additionally arranged in an inner hole at the head of the rocker arm 1 and is fixed by bolts.
And (3) clamping a right-angle milling head by a main shaft of the numerical control boring machine, adjusting the angle to be 45 degrees with the horizontal plane, programming and rotating a machining coordinate shaft system, wherein the rotation of the coordinate shaft system means that each shaft of the numerical control boring machine performs spatial rotation according to the programming, and the rotation is not the actual rotation of the machine tool. The procedure for machining a hole was as follows:
and milling and drilling can be carried out on the cutter according to the program to finish the inclined hole machining. When the hole position is changed, only the B-axis data in the program needs to be changed, and other programs are unchanged. When the B shaft rotates to a certain degree and exceeds the processing range of the angle milling head, the angle of the angle milling head is only required to be mirrored, the ROT Y90 in the program is changed into ROT Y-90, and the rest programs are unchanged, so that the rest inclined holes can be completed. All inclined holes of the head of the whole rocker arm can be completed by the processing scheme. After multiple times of implementation, the inclined holes machined by the numerical control horizontal boring machine are all qualified, and the average machining time of the whole rocker arm inclined hole is 178.8 minutes.
35 minutes are spent with the calibration to original processing scheme rocking arm clamping, 30 minutes are spent with the calibration to rocking arm clamping, 160 minutes are spent with 8 inclined hole processing, 120 minutes are spent with 8 degrees of replacement to the angle milling head, 15 minutes are dismantled to the rocking arm, totals about 360 minutes. By adopting the scheme of the invention, the processing of 36 rocker arm inclined holes is completed within three months, so that the time is saved: 36 × (360-178.8) ═ 6523.2 minutes (about 108.72 hours), which results in a total cost savings: 108.72X 300 (processing cost per hour) 32616 Yuan.
Claims (4)
1. A method for processing inclined holes of a rocker arm of a coal mining machine by utilizing space rotation of a coordinate system is characterized by comprising the following steps: clamping a rocker arm of a coal mining machine on a working table of a numerical control boring machine, and ensuring that the end surface of the rocker arm head of the rocker arm of the coal mining machine is parallel to the working table; the main shaft of the numerical control boring machine clamps the right-angle milling head and programs the right-angle milling head to rotate a machining coordinate shaft system, wherein the rotation of the machining coordinate shaft system comprises the following steps: fixing the Y axis, and rotating the X axis plane and the Z axis plane by 90 degrees; fixing the X axis rotated in the first step, and rotating Y axis and Z axis planes according to the angle between the inclined hole and the end face of the rocker arm head; performing inclined hole machining on a rocker arm head of the rocker arm of the coal mining machine by feeding in the Z-axis direction; and (3) rotating the processing table board by taking the circle center of the distribution circle of the rocker arm head of the inclined hole to be processed as an axis, and feeding in sequence at the distribution angle of each inclined hole to be processed to complete the processing of each inclined hole.
2. The method for machining the inclined hole of the rocker arm of the coal mining machine by utilizing the spatial rotation of the coordinate system as claimed in claim 1, wherein after the inclined hole to be machined exceeds the stroke when the center of a distribution circle of the rocker arm head is used as an axis to rotate a machining table surface, the angle of the right-angle milling head is subjected to mirror image processing.
3. The method for machining the inclined hole of the rocker arm of the coal mining machine by utilizing the spatial rotation of the coordinate system as claimed in claim 2, wherein the mirror image processing is to fix the Y axis after the rotation in the second step and rotate the X axis and the Z axis plane by 180 degrees.
4. The method for machining the inclined hole of the rocker arm of the coal mining machine by utilizing the spatial rotation of the coordinate system as claimed in claim 2, wherein the mirror image processing is to fix the Y axis after the rotation in the first step, rotate the X axis and the Z axis plane by 180 degrees, and then perform the second step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011354038.0A CN112475403A (en) | 2020-11-27 | 2020-11-27 | Method for machining inclined hole of rocker arm of coal mining machine by utilizing spatial rotation of coordinate system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011354038.0A CN112475403A (en) | 2020-11-27 | 2020-11-27 | Method for machining inclined hole of rocker arm of coal mining machine by utilizing spatial rotation of coordinate system |
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| CN112475403A true CN112475403A (en) | 2021-03-12 |
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| CN102091936A (en) * | 2011-01-24 | 2011-06-15 | 青岛淄柴博洋柴油机股份有限公司 | Method for processing crankshaft oil holes |
| CN105127474A (en) * | 2015-09-22 | 2015-12-09 | 北京理工大学 | Method for drilling and processing spray holes suitable for diesel engine nozzle |
| CN106944680A (en) * | 2017-03-28 | 2017-07-14 | 重庆大学 | A kind of disc type gear is molded roll flute adaptive machining method |
| CN107350748A (en) * | 2017-08-16 | 2017-11-17 | 青岛淄柴博洋柴油机股份有限公司 | A kind of V-type machine body inclined-plane and the processing method of beveled aperture system |
| CN110434852A (en) * | 2019-07-16 | 2019-11-12 | 珠海卡佩克机器人科技有限公司 | A kind of method of perforation processing and system |
| CN110851919A (en) * | 2018-07-26 | 2020-02-28 | 中国商用飞机有限责任公司 | Method for processing inclined hole |
| CN111730332A (en) * | 2019-03-25 | 2020-10-02 | 杉野机械股份有限公司 | Drilling method and drilling machine |
-
2020
- 2020-11-27 CN CN202011354038.0A patent/CN112475403A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000237933A (en) * | 1999-02-19 | 2000-09-05 | Honda Motor Co Ltd | Oblique attitude tool control method of machine tool |
| JP2003275941A (en) * | 2002-03-20 | 2003-09-30 | Nakamura Tome Precision Ind Co Ltd | Nc machine tool |
| JP2004030422A (en) * | 2002-06-27 | 2004-01-29 | Nakamura Tome Precision Ind Co Ltd | Control method for machine tool equipped with rotary tool turret |
| CN102091936A (en) * | 2011-01-24 | 2011-06-15 | 青岛淄柴博洋柴油机股份有限公司 | Method for processing crankshaft oil holes |
| CN105127474A (en) * | 2015-09-22 | 2015-12-09 | 北京理工大学 | Method for drilling and processing spray holes suitable for diesel engine nozzle |
| CN106944680A (en) * | 2017-03-28 | 2017-07-14 | 重庆大学 | A kind of disc type gear is molded roll flute adaptive machining method |
| CN107350748A (en) * | 2017-08-16 | 2017-11-17 | 青岛淄柴博洋柴油机股份有限公司 | A kind of V-type machine body inclined-plane and the processing method of beveled aperture system |
| CN110851919A (en) * | 2018-07-26 | 2020-02-28 | 中国商用飞机有限责任公司 | Method for processing inclined hole |
| CN111730332A (en) * | 2019-03-25 | 2020-10-02 | 杉野机械股份有限公司 | Drilling method and drilling machine |
| CN110434852A (en) * | 2019-07-16 | 2019-11-12 | 珠海卡佩克机器人科技有限公司 | A kind of method of perforation processing and system |
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