CN104259539A - Method for processing large-diameter segmental-arc feature by adopting small working table - Google Patents
Method for processing large-diameter segmental-arc feature by adopting small working table Download PDFInfo
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- CN104259539A CN104259539A CN201410487886.7A CN201410487886A CN104259539A CN 104259539 A CN104259539 A CN 104259539A CN 201410487886 A CN201410487886 A CN 201410487886A CN 104259539 A CN104259539 A CN 104259539A
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- coordinate system
- processing
- segmental arc
- subtable
- floating
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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
- B23C3/28—Grooving workpieces
- B23C3/34—Milling grooves of other forms, e.g. circumferential
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- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a method for processing large-diameter segmental-arc feature by adopting a small working table. The method comprises the steps of initializing, building a workpiece coordinate system, building a floating coordinate system, establishing the transformational relation of two coordinate systems, entering the floating coordinate system to call a tooth groove processing subroutine, leaving the floating coordinate system to judge weather all tooth grooves are processed completely, if not, repeating the indexing until the tooth grooves are processed completely. According to the method, machine tool resources can be reasonably distributed, the utilization rate of the machine tool is improved, the processing quality and the processing efficiency are high, the promotion property is strong, and the processing requirements of the product can be well met.
Description
Technical field
The present invention relates to mechanical arc machining, specifically a kind of method of subtable processing major diameter segmental arc type feature.
Background technology
Along with steam turbine set steam sealing device is constantly updated, existing a kind of special steam seal ring, this steam seal ring structure is special, on conventional steam seal ring basis, add near end endoporus body helical teeth structural element circumferentially, this helical teeth number of teeth is more, feature is uniform along the centre of gyration, processing capacity is large, and steam seal ring diameter is larger, but each segmental arc length dimension is less than normal, existing processing scheme, all need to select the rotary table being greater than this diameter of part, by worktable rotary center, carry out calibration processing, cause part to process like this and select machine tool not mate, cost of goods manufactured is directly caused significantly to rise.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, providing a kind of subtable to process the method for major diameter segmental arc type feature, the method can process Large diameter rotary workpiece with small turning diameter workbench.
Realizing technical scheme of the present invention is: a kind of method of subtable processing major diameter segmental arc type feature, comprises the steps:
1) segmental arc part to be processed is placed on subtable; Call main program and subtable is returned back to original position and centering, determine the workpiece coordinate system of calibration location;
2) after rotating with subtable, the floating coordinate system being used for single teeth groove milling is set up in the mathematical computations position of each processing stand;
3) determine that segmental arc part is placed in the position of subtable and the calibration conversion relation between workpiece coordinate system and floating coordinate system, and determine the reduction formula between Two coordinate system;
4) floating coordinate system is converted to by workpiece coordinate system;
5) call teeth groove processing subprogram, carry out teeth groove processing;
6), after a teeth groove machines, by floating coordinate, system converts workpiece coordinate system to;
7) determine segmental arc part position, judge whether the processing of each teeth groove completes, and then enters the 2nd as unfinished) step, continues the processing of next calibration, if completed, enters next step;
8) end program is entered.
In step 1) centering time, be that workpiece is positioned in the symmetrical centre of mold, make OAO ' point-blank, and this straight line parallel be in Z axis;
Described step 3) utilize the mathematical computations position of each processing stand after rotating compared with subtable to set up floating coordinate system, coordinate position computing formula is:
ΔX＝(R+D)*SINα；
ΔZ＝-(R+D)*(1-COSα)；
Wherein: Δ X be processing stand at X axis offset distance, Δ Z be processing stand at Z-axis direction offset distance, R is machined surface segmental arc radius, and D is that the centre of gyration arrives segmental arc machined surface distance, and α is rotary table corner.
The invention has the beneficial effects as follows: use above-mentioned processing method, can reasonably distribute lathe resource, improve machine tool utilization rate, product processing quality and efficiency comparison high, replicability is strong, meets the processing request of product well.
Accompanying drawing explanation
Fig. 1 is clamping workpiece schematic diagram of the present invention;
Fig. 2 is initial position schematic diagram of the present invention;
Fig. 3 is position view after worktable rotary of the present invention;
Fig. 4 is routine call flow chart.
Number in the figure: 1-fixture, 2-segmental arc part, 3-segmental arc locating surface, 4-alignment pin, 5-subtable, O-work table rotation center, O '-segmental arc centre of gyration, A-machined surface segmental arc central point, P-processing on real-time position, R-machined surface segmental arc radius, D-centre of gyration is to segmental arc machined surface distance, α-rotary table corner, Δ X-processing stand is at X axis offset distance, and Δ Z-processing stand is at Z-axis direction offset distance.
Detailed description of the invention
As shown in Figure 1, Figure 2 and Figure 3, segmental arc part 2 is positioned over positioning fixture 1 top on subtable 5, two ends alignment pin 4 is fixed, and segmental arc locating surface 3 is towards work table rotation center O.Note segmental arc part 2 to be positioned in the symmetrical centre of fixture 1, make work table rotation center O, machined surface segmental arc central point A, segmental arc centre of gyration O ' draw a straight line, namely OAO ' point-blank, and this straight line parallel is in Z axis; Measure dimension D and size R, floating coordinate system is set up in the mathematical computations position then utilizing rotary table 5 to rotate rear each processing stand, and coordinate position computing formula is: Δ X=(R+D) * SIN α; Δ Z=-(R+D) * (1-COS α), wherein: Δ X be processing stand at X axis offset distance, Δ Z be processing stand at Z-axis direction offset distance, R is machined surface segmental arc radius, D is that the centre of gyration arrives segmental arc machined surface distance, and α is rotary table corner.Workpiece coordinate system like this for calibration location is just set up with the floating coordinate system relation for single teeth groove milling.
As shown in Figure 4, processing is carried out as follows: from step 100, enter step 110 rotary table to start angle, set up workpiece coordinate system after at this moment obtaining initialization data, set up floating coordinate system, workpiece Two coordinate system conversion formula, sets up Two coordinate system transformational relation.Step 120 by coordinate setting in subprogram starting point, after workpiece coordinate system is converted to floating coordinate system by step 130, transfer a teeth groove processing of teeth groove processing subprogram completing steps 140, process rear floating coordinate system and be converted to workpiece coordinate system and step 150, step 160 is determining steps, judges whether teeth groove machines, and completes if each bar teeth groove is undressed, enter step 110 to have again, process another teeth groove; Each teeth groove machines just to enter and terminates program step 170.
Claims (3)
1. a method for subtable processing major diameter segmental arc type feature, is characterized in that, comprise the steps:
1) segmental arc part to be processed is placed on subtable; Call main program and subtable is returned back to original position and centering, determine the workpiece coordinate system of calibration location;
2) after rotating with subtable, the floating coordinate system being used for single teeth groove milling is set up in the mathematical computations position of each processing stand;
3) determine that segmental arc part is placed in the position of subtable and the calibration conversion relation between workpiece coordinate system and floating coordinate system, and determine the reduction formula between Two coordinate system;
4) floating coordinate system is converted to by workpiece coordinate system;
5) call teeth groove processing subprogram, carry out teeth groove processing;
6), after a teeth groove machines, by floating coordinate, system converts workpiece coordinate system to;
7) determine segmental arc part position, judge whether the processing of each teeth groove completes, and then enters the 2nd as unfinished) step, continues the processing of next calibration, if completed, enters next step;
8) end program is entered.
2. the method for subtable processing major diameter segmental arc type feature according to claim 1, is characterized in that: in step 1) centering time, be that workpiece is positioned in the symmetrical centre of mold, make OAO ' point-blank, and this straight line parallel be in Z axis.
3. subtable processes the method for major diameter segmental arc type feature according to claim 1, it is characterized in that: described step 3) utilize the mathematical computations position of each processing stand after rotating compared with subtable to set up floating coordinate system, coordinate position computing formula is:
ΔX＝(R+D)*SINα；
ΔZ＝-(R+D)*(1-COSα)；
Wherein: Δ X be processing stand at X axis offset distance, Δ Z be processing stand at Z-axis direction offset distance, R is machined surface segmental arc radius, and D is that the centre of gyration arrives segmental arc machined surface distance, and α is rotary table corner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487886.7A CN104259539A (en) | 2014-09-22 | 2014-09-22 | Method for processing large-diameter segmental-arc feature by adopting small working table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487886.7A CN104259539A (en) | 2014-09-22 | 2014-09-22 | Method for processing large-diameter segmental-arc feature by adopting small working table |
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| CN104259539A true CN104259539A (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410487886.7A Pending CN104259539A (en) | 2014-09-22 | 2014-09-22 | Method for processing large-diameter segmental-arc feature by adopting small working table |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735484A (en) * | 2016-12-20 | 2017-05-31 | 哈尔滨电气动力装备有限公司 | Shield electric machine stator core tooth support end milling groove processing technology |
| CN108415370A (en) * | 2018-02-07 | 2018-08-17 | 东方电气集团东方锅炉股份有限公司 | The relative position acquisition methods of arc section class workpiece on rotary table |
| CN108971587A (en) * | 2018-09-17 | 2018-12-11 | 江苏透平电力技术有限公司 | A kind of packing segmental arc grooving apparatus |
| CN112620817A (en) * | 2020-12-17 | 2021-04-09 | 重庆齿轮箱有限责任公司 | Sectional type gear machining method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091908A (en) * | 2010-12-31 | 2011-06-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Numerical control machining method for sector section and annular section parts |
| CN102430764A (en) * | 2011-10-21 | 2012-05-02 | 陕西科技大学 | Method and auxiliary fixture for processing large-diameter thin-wall arc plate part |
| CN103949854A (en) * | 2014-04-23 | 2014-07-30 | 马鞍山马钢表面工程技术有限公司 | Subsection machining method for large-diameter arc toothed plate |
-
2014
- 2014-09-22 CN CN201410487886.7A patent/CN104259539A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102091908A (en) * | 2010-12-31 | 2011-06-15 | 沈阳黎明航空发动机(集团)有限责任公司 | Numerical control machining method for sector section and annular section parts |
| CN102430764A (en) * | 2011-10-21 | 2012-05-02 | 陕西科技大学 | Method and auxiliary fixture for processing large-diameter thin-wall arc plate part |
| CN103949854A (en) * | 2014-04-23 | 2014-07-30 | 马鞍山马钢表面工程技术有限公司 | Subsection machining method for large-diameter arc toothed plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735484A (en) * | 2016-12-20 | 2017-05-31 | 哈尔滨电气动力装备有限公司 | Shield electric machine stator core tooth support end milling groove processing technology |
| CN108415370A (en) * | 2018-02-07 | 2018-08-17 | 东方电气集团东方锅炉股份有限公司 | The relative position acquisition methods of arc section class workpiece on rotary table |
| CN108971587A (en) * | 2018-09-17 | 2018-12-11 | 江苏透平电力技术有限公司 | A kind of packing segmental arc grooving apparatus |
| CN108971587B (en) * | 2018-09-17 | 2024-03-08 | 江苏透平电力技术有限公司 | Steam seal arc section grooving device |
| CN112620817A (en) * | 2020-12-17 | 2021-04-09 | 重庆齿轮箱有限责任公司 | Sectional type gear machining method |
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Application publication date: 20150107 |