CN110977618B - Method for acquiring bus data in inner wall partition area of titanium alloy spray pipe - Google Patents
Method for acquiring bus data in inner wall partition area of titanium alloy spray pipe Download PDFInfo
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- CN110977618B CN110977618B CN201911215291.5A CN201911215291A CN110977618B CN 110977618 B CN110977618 B CN 110977618B CN 201911215291 A CN201911215291 A CN 201911215291A CN 110977618 B CN110977618 B CN 110977618B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
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Abstract
The invention relates to a method for acquiring bus data in a partitioned area of the inner wall of a titanium alloy spray pipe, belonging to the field of pretreatment of the inner wall data of the spray pipe; the method comprises the following steps: step one, establishing a bus data acquisition system; scanning the outer wall of the spray pipe inner wall blank by adopting a single-point laser scanning sensor to obtain a bus with deviation between an actual bus and a theoretical bus of the spray pipe inner wall blank; measuring the deviation value of the deviation bus and the theoretical bus by adopting a dial indicator; dividing adjacent 2 buses with deviation into regions; scanning by adopting a single-point laser scanning sensor to obtain a data point set of the middle bus; fifthly, milling the inner wall blank of the spray pipe according to the data of the actual bus at the midpoint; the invention can effectively generate a processing program when the local attaching state of the spray pipe inner wall blank and the mould is poor, thereby expanding the application range of processing, ensuring the consistency of the size of the milling groove, shortening the sampling time and improving the processing efficiency.
Description
Technical Field
The invention belongs to the field of pretreatment of data on the inner wall of a spray pipe, and relates to a method for acquiring bus data in a partitioned area on the inner wall of a titanium alloy spray pipe.
Background
Chinese patent publication No. CN 101412122a, published as 22/4/2009, entitled "vertical machining method for nozzle cooling channel of liquid rocket engine", discloses a method for vertically machining nozzle cooling channel of liquid rocket engine, which is based on drawing bus data, and uses a single-point laser sensor to scan actual buses of a blank on the inner wall of a nozzle one by one, and calculates a milling tool path trajectory after processing the data, and is suitable for machining a nozzle milling groove in a good fitting state with a mold. The disadvantages are as follows: when the blank of the inner wall of the spray pipe is in a poor local joint state with the mould and the local actual bus of the product deviates from the theoretical bus by more than 0.5mm, the deviation exceeds the range of data processed by software and a milling program cannot be generated.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method for acquiring the bus data in the inner wall partition area of the titanium alloy spray pipe overcomes the defects of the prior art, can effectively generate a processing program when the local attaching state of a spray pipe inner wall blank and a clamping fixture is poor, enlarges the application range of processing, ensures the consistency of the size of a milling groove, shortens the sampling time and improves the processing efficiency.
The technical scheme of the invention is as follows:
the method for acquiring the bus data in the inner wall partition area of the titanium alloy spray pipe comprises the following steps:
step one, establishing a bus data acquisition system; the device comprises a machine tool rotary table, a switching tool, a spray pipe inner wall blank, a mould, a single-point laser scanning sensor and a dial indicator; the transfer tool is fixedly arranged on a machine tool rotary table, and the spray pipe inner wall blank is fixedly arranged on the upper surface of the transfer tool; the mould is pressed on the top of the spray pipe inner wall blank; the inner wall blank of the spray pipe is driven by the switching tool to rotate along with the rotary table of the lathe; the single-point laser scanning sensor and the dial indicator are arranged on the outer side of the spray pipe inner wall blank;
scanning the outer wall of the spray pipe inner wall blank by adopting a single-point laser scanning sensor to obtain a bus with deviation between an actual bus and a theoretical bus of the spray pipe inner wall blank;
thirdly, measuring the bus with the deviation by adopting a dial indicator; measuring the deviation value of the deviation bus and the theoretical bus; dividing adjacent 2 buses with deviation into regions;
scanning the middle bus of the divided area by adopting a single-point laser scanning sensor; obtaining a data point set of the middle bus;
and fifthly, milling the spray pipe inner wall blank according to the data of the actual bus at the midpoint.
In the second step, the specific method for scanning the outer wall of the spray pipe inner wall blank by the single-point laser scanning sensor is as follows:
the single-point laser scanning sensor scans the bus of the outer wall of the spray pipe inner wall blank from top to bottom along the bus direction; after one bus is scanned; the spray pipe inner wall blank rotates along with the machine tool rotary table; and the single-point laser scanning sensor performs next bus scanning.
In the third step, the specific method for dividing adjacent 2 buses with deviation into regions is as follows:
and dividing the outer wall of the spray pipe inner wall blank into arc sections by taking 2 adjacent buses with deviation as boundaries.
In the fourth step, the method for determining the middle bus comprises the following steps: taking the middle point of the circumferential arc segment of the divided region; the bus where the midpoint is located is the middle bus.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the profile bus acquired actually is used as a theoretical bus, and a processing program can be generated when the local attaching state of the spray pipe inner wall blank and the clamping fixture is poor, so that the application range of processing is expanded;
(2) the invention adopts the actual bus for regional sampling as the theoretical bus, and can ensure the consistency of the size of the milling groove when the deviation of the blueprint bus of the blank on the inner wall of the spray pipe is 0.5-3 mm;
(3) the method for sampling by dividing the area reduces the number of sampling buses, shortens the sampling time and improves the processing efficiency.
Drawings
FIG. 1 is a flow chart of bus data acquisition according to the present invention;
FIG. 2 is a schematic view of a bus data acquisition system of the present invention.
Detailed Description
The invention is further illustrated by the following examples.
The invention provides a method for acquiring bus data in a partitioned area of an inner wall of a titanium alloy spray pipe, which divides a deviation part of a local actual bus and a theoretical bus of the inner wall of the titanium alloy spray pipe into a plurality of areas according to a circumferential jumping amount, controls the data deviation of the whole area by taking the bus at the arc length midpoint of each area as the theoretical bus for data processing, can generate a processing program through data optimization, and solves the problem that a milling cutter path cannot be generated due to overlarge deviation of the actual bus and the theoretical bus.
As shown in fig. 1, the method for acquiring bus data in the inner wall partition area of the titanium alloy nozzle mainly comprises the following steps:
step one, establishing a bus data acquisition system as shown in figure 2; the device comprises a machine tool rotary table 4, a switching tool 3, a spray pipe inner wall blank 2, a mould 1, a single-point laser scanning sensor 5 and a dial indicator 6; the transfer tool 3 is fixedly arranged on a machine tool rotary table 4, and the spray pipe inner wall blank 2 is fixedly arranged on the upper surface of the transfer tool 3; the mould 1 is pressed on the top of the spray pipe inner wall blank 2; the inner wall blank 2 of the spray pipe is driven by the switching tool 3 to rotate along with the rotary table 4 of the lathe; the single-point laser scanning sensor 5 and the dial indicator 6 are arranged on the outer side of the spray pipe inner wall blank 2;
scanning the outer wall of the spray pipe inner wall blank 2 by using a single-point laser scanning sensor 5 to obtain a bus of the spray pipe inner wall blank 2 with deviation between an actual bus and a theoretical bus; the specific method for scanning the outer wall of the spray pipe inner wall blank 2 by the single-point laser scanning sensor 5 comprises the following steps:
the single-point laser scanning sensor 5 scans the bus of the outer wall of the spray pipe inner wall blank 2 from top to bottom along the bus direction; after one bus is scanned; the spray pipe inner wall blank 2 rotates along with the lathe turntable 4; the single-point laser scanning sensor 5 performs the next bus scanning.
Thirdly, measuring the bus with the deviation by adopting a dial indicator 6; measuring the deviation value of the deviation bus and the theoretical bus; dividing adjacent 2 buses with deviation into regions; the specific method for dividing adjacent 2 buses with deviation into areas comprises the following steps:
and (3) dividing the outer wall of the spray pipe inner wall blank 2 into arc sections by taking 2 adjacent buses with deviation as boundaries.
Scanning the middle bus of the divided area by adopting a single-point laser scanning sensor 5; obtaining a data point set of the middle bus; the method for determining the middle bus comprises the following steps: taking the middle point of the circumferential arc segment of the divided region; the bus where the midpoint is located is the middle bus.
And fifthly, according to the data of the actual bus at the midpoint, taking the data point set as a theoretical bus for processing, optimizing the data and generating a milling program. And milling the spray pipe inner wall blank 2.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (3)
1. The method for acquiring the bus data in the inner wall partition area of the titanium alloy spray pipe is characterized by comprising the following steps of: the method comprises the following steps:
step one, establishing a bus data acquisition system; the device comprises a machine tool rotary table (4), a switching tool (3), a spray pipe inner wall blank (2), a mould (1), a single-point laser scanning sensor (5) and a dial indicator (6); the transfer tool (3) is fixedly arranged on a machine tool rotary table (4), and the spray pipe inner wall blank (2) is fixedly arranged on the upper surface of the transfer tool (3); the mould (1) is pressed on the top of the spray pipe inner wall blank (2); the spray pipe inner wall blank (2) is driven by the transfer tool (3) to rotate along with the rotary table (4); the single-point laser scanning sensor (5) and the dial indicator (6) are arranged on the outer side of the spray pipe inner wall blank (2);
scanning the outer wall of the spray pipe inner wall blank (2) by using a single-point laser scanning sensor (5) to obtain a bus with deviation between an actual bus and a theoretical bus of the spray pipe inner wall blank (2);
thirdly, measuring the bus with the deviation by adopting a dial indicator (6); measuring the deviation value of the deviation bus and the theoretical bus; dividing adjacent 2 buses with deviation into regions;
scanning the middle bus of the divided area by adopting a single-point laser scanning sensor (5); obtaining a data point set of the middle bus; the method for determining the middle bus comprises the following steps: taking the middle point of the circumferential arc segment of the divided region; the bus where the midpoint is located is the middle bus;
and step five, milling the spray pipe inner wall blank (2) according to the data of the actual bus at the midpoint.
2. The method for acquiring bus data in the partitioned area on the inner wall of the titanium alloy nozzle as claimed in claim 1, wherein the method comprises the following steps: in the second step, the specific method for scanning the outer wall of the spray pipe inner wall blank (2) by the single-point laser scanning sensor (5) comprises the following steps:
the single-point laser scanning sensor (5) scans the bus of the outer wall of the spray pipe inner wall blank (2) from top to bottom along the bus direction; after one bus is scanned; the spray pipe inner wall blank (2) rotates along with the machine table (4); and the single-point laser scanning sensor (5) performs next bus scanning.
3. The method for acquiring bus data in the partitioned area on the inner wall of the titanium alloy nozzle as claimed in claim 2, wherein the method comprises the following steps: in the third step, a specific method for dividing adjacent 2 buses with deviation into regions is as follows:
and (3) dividing the outer wall of the spray pipe inner wall blank (2) into arc sections by taking 2 adjacent buses with deviation as boundaries.
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| CN201911215291.5A CN110977618B (en) | 2019-12-02 | 2019-12-02 | Method for acquiring bus data in inner wall partition area of titanium alloy spray pipe |
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| CN110977618B true CN110977618B (en) | 2021-01-12 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0880645A1 (en) * | 1996-02-12 | 1998-12-02 | Volvo Aero Corporation | Rocket engine nozzle |
| CN101412122A (en) * | 2008-11-26 | 2009-04-22 | 大连理工大学 | Vertical type method for processing nozzle cooling channel of liquid-propel land rocket engine |
| CN102156441A (en) * | 2010-12-23 | 2011-08-17 | 大连理工大学 | Method for machining outer surface of bent pipe by three-shaft numerically controlled milling |
| CN104897080A (en) * | 2015-06-08 | 2015-09-09 | 哈尔滨工程大学 | Solid-of-revolution bus contour measuring instrument |
| CN208109068U (en) * | 2018-04-12 | 2018-11-16 | 西安理工大学 | The linearity measurer of bus in tubular workpiece pipe |
| CN109794805A (en) * | 2019-01-22 | 2019-05-24 | 西安精雕软件科技有限公司 | A kind of cone hole machine bus deviation automatic detection device and its detection method |
| CN110455246A (en) * | 2019-08-27 | 2019-11-15 | 浙江大学 | A kind of surface shape measurement device and method for conformal optical element |
-
2019
- 2019-12-02 CN CN201911215291.5A patent/CN110977618B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0880645A1 (en) * | 1996-02-12 | 1998-12-02 | Volvo Aero Corporation | Rocket engine nozzle |
| CN101412122A (en) * | 2008-11-26 | 2009-04-22 | 大连理工大学 | Vertical type method for processing nozzle cooling channel of liquid-propel land rocket engine |
| CN102156441A (en) * | 2010-12-23 | 2011-08-17 | 大连理工大学 | Method for machining outer surface of bent pipe by three-shaft numerically controlled milling |
| CN104897080A (en) * | 2015-06-08 | 2015-09-09 | 哈尔滨工程大学 | Solid-of-revolution bus contour measuring instrument |
| CN208109068U (en) * | 2018-04-12 | 2018-11-16 | 西安理工大学 | The linearity measurer of bus in tubular workpiece pipe |
| CN109794805A (en) * | 2019-01-22 | 2019-05-24 | 西安精雕软件科技有限公司 | A kind of cone hole machine bus deviation automatic detection device and its detection method |
| CN110455246A (en) * | 2019-08-27 | 2019-11-15 | 浙江大学 | A kind of surface shape measurement device and method for conformal optical element |
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