CN110497315B - Device for automatically setting tool and measuring workpiece central point and tool setting method - Google Patents
Device for automatically setting tool and measuring workpiece central point and tool setting method Download PDFInfo
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- CN110497315B CN110497315B CN201910834291.7A CN201910834291A CN110497315B CN 110497315 B CN110497315 B CN 110497315B CN 201910834291 A CN201910834291 A CN 201910834291A CN 110497315 B CN110497315 B CN 110497315B
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- measuring head
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- measuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
Abstract
A device for automatically setting a tool and measuring a workpiece central point and a tool setting method relate to the field of automatic tool setting of machine tools. Comprises a base plate, a guide rail, a sliding table, a fixing plate, a measuring head, a tool setting gauge and a magnetic suction seat; the base plate is fixed on a swing arm of the air bag polishing machine tool, and the guide rail is arranged on the base plate; the sliding table is slidably arranged on the guide rail; the fixed plate is fixedly connected with the sliding table; the measuring head is fixed on the fixing plate; the tool setting gauge is fixed on a magnetic suction seat, and the magnetic suction seat is adsorbed on the workbench. Before the tool setting is carried out for the first time, the relative position of the horizontal plane of the measuring head and the horizontal plane of the spindle of the air bag polishing machine needs to be determined, then a programmed program is operated, the relative height difference between the measuring head and the air bag is automatically calculated, the workpiece setting error and the workpiece center point are measured by using the measuring head, and then the coordinate value of the air bag relative to the workpiece center is converted, so that the high-precision tool setting is realized.
Description
Technical Field
The invention relates to the field of automatic tool setting of machine tools, in particular to a device for automatically setting a tool and measuring a workpiece central point and a tool setting method.
Background
The traditional tool setting mode mostly uses a trial cutting method, namely, a tool is used for trial machining on the surface of a workpiece, the relative position of the tool and the workpiece is measured, a tool head needs to be moved manually and corresponding coordinate values are recorded, time and labor are wasted, and the method for manually judging whether the workpiece is aligned is to measure the jumping difference value of two end points on one side of the workpiece by using a dial indicator, so that the efficiency is low and the accuracy is low.
The existing gauge head tool setting technology is applied to an air bag polishing machine tool in the following form: and (3) mounting the measuring head on the main shaft, measuring the arrangement deviation and the central point of the workpiece, dismounting the measuring head after the measurement is finished, replacing the air bag head, and contacting the workpiece by using the air bag head to finish the tool setting in the height direction. The method needs to frequently disassemble the air bag head, has complicated steps and long time consumption, and is difficult to ensure the precision in the height direction.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a device and a method for automatically setting a tool and measuring the center point of a workpiece.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for automatically setting a tool and measuring the center point of a workpiece comprises a base plate, a guide rail, a sliding table, a fixing plate, a measuring head, a tool setting gauge and a magnetic suction seat; the base plate is fixed on a swing arm of the air bag polishing machine tool, and the guide rail is arranged on the base plate; the sliding table is slidably arranged on the guide rail; the fixed plate is fixedly connected with the sliding table; the measuring head is fixed on the fixing plate; the tool setting gauge is fixed on a magnetic suction seat, and the magnetic suction seat is adsorbed on the workbench.
The measuring head comprises a measuring head base, a measuring head main body and a measuring needle; the measuring head base is arranged on the fixing plate and is connected with a signal wire of the air bag polishing machine tool; the measuring head main body is locked on the measuring head base through threads, a sensor is arranged in the measuring head main body, the sensor is a piezoelectric sensor, and an electric signal is generated during mechanical triggering so as to judge whether the measuring head main body is in contact with a workpiece; the measuring needle is locked on the measuring head main body through threads and is used for contacting with a workpiece and the tool setting gauge.
The sliding table is provided with a locking knob and a driving knob, the locking knob is used for enabling the sliding table to be fixed at a specified position, and the driving knob is used for enabling the sliding table to move up and down.
The fixed plate is L type fixed plate, and the fixed plate side passes through the bolt fastening on the slip table, and the bottom of fixed plate is equipped with a cylinder hole, and this cylinder hole is used for installing the gauge head.
The tool setting method adopting the device for automatically setting the tool and measuring the center point of the workpiece comprises the following steps of:
1) determining the horizontal plane relative position of a measuring head and a main shaft of a gasbag polishing machine tool before the tool is set for the first time;
2) moving the measuring head downwards to the lowest point of the guide rail, and fixing the measuring head;
3) operating a tool setting measurement program to establish a relative height relation of the air bag head relative to the highest point of the upper surface of the workpiece;
4) after the measuring program is finished, the alignment error of the workpiece and the coordinates of the central point of the workpiece are output to a numerical control interface;
5) after tool setting measurement is completed, the sliding table is moved to the highest end of the guide rail to be locked, and finally the measuring head main body is screwed down.
In the invention, the operation method of the step 3) is as follows:
3.1) moving the measuring head to be right above the tool setting gauge, then moving the measuring head downwards to trigger the tool setting gauge, and determining the height value of the measuring head relative to the tool setting gauge;
3.2) using a measuring head to respectively take coordinate values of at least one point on four sides of the rectangular workpiece, respectively adding the coordinate values of opposite sides and dividing the sum by the number of the taken points to obtain the plane center coordinate of the workpiece;
3.3) moving the measuring head to be right above the central point of the workpiece, then moving the measuring head downwards to touch the top surface of the workpiece, and obtaining the height value of the measuring head relative to the highest point of the upper surface of the workpiece, thereby establishing a relative height relation between the highest point of the upper surface of the workpiece and the tool setting gauge;
and 3.4) swinging the air bag head to an inclined working pose, moving the air bag head to a position right above the tool setting gauge, triggering the tool setting gauge downwards, and obtaining the height value of the air bag head relative to the tool setting gauge so as to establish the relative height relation of the air bag head relative to the highest point of the upper surface of the workpiece.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the invention is used for the precise tool setting process of the precise polishing process of the workpiece, ensures that the placement error of the workpiece on the workbench is within an allowable range, and can establish the spatial relationship of the cutter air bag head relative to the central point of the workpiece.
2. The invention can avoid the error generated by the traditional trial cutting method for tool setting, and simultaneously save the frequent disassembly time generated by tool setting measurement when the measuring head is arranged on the main shaft.
3. The accurate coordinate of the center point of the workpiece can be obtained through the invention, so that the accuracy of the subsequent polishing path can be guaranteed, and the whole precision polishing process can reach the standard.
4. The invention can realize one-key tool setting, does not need manual intervention in the tool setting process for workpieces with the same size, avoids manual error and uncertainty, and improves the consistency of tool setting precision.
5. After the tool setting measurement is finished, the tool setting gauge and the measuring head main body can be quickly disassembled, the processing time is not delayed, and meanwhile, the tool setting gauge and the measuring head main body are convenient to install and disassemble.
6. According to the invention, the horizontal coordinate difference value of two points on one side of the rectangle of the workpiece is calculated through the coordinate values of the two points on the side, so that the placing error value of the workpiece is obtained, and the workpiece is placed in a correct position according to the placing error value.
Drawings
FIG. 1 is a schematic view of the overall exploded structure of the present invention;
FIG. 2 is a schematic perspective view of the present invention mounted on an air bag polishing machine;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic view of measuring a center point of a workpiece.
Reference numerals: 2. b, swinging an arm; 3. a substrate; 4. a guide rail; 5. an air bag head; 6. a sliding table; 7. a fixing plate; 8. a probe base; 9. a probe main body; 10. measuring a needle; 11. tool setting gauge; 12. a magnetic suction base; 13. and (5) a workpiece.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1 to 3, the embodiment of the invention includes a substrate 3, a guide rail 4, a sliding table 6, a fixing plate 7, a measuring head, a tool setting gauge 11 and a magnetic suction seat 12;
the base plate 3 is fixed on a B-axis swing arm 2 of the air bag polishing machine tool, and the guide rail 4 is arranged on the base plate 3; the sliding table 6 is slidably arranged on the guide rail 4; the fixed plate 7 is connected with the sliding table 6 through bolts; the measuring head is fixed on the fixing plate 7; the tool setting gauge 11 is fixed on a magnetic suction seat 12, and the magnetic suction seat 12 is adsorbed in a specified area of the workbench.
The measuring head comprises a measuring head base 8, a measuring head main body 9 and a measuring needle 10; the measuring head base 8 is arranged on the fixing plate 7 and is connected with a signal wire of the air bag polishing machine tool; the measuring head main body 9 is locked on the measuring head base 8 through threads, a sensor is arranged in the measuring head main body 9, the sensor is a piezoelectric sensor, and an electric signal is generated when the sensor is mechanically triggered so as to judge whether the sensor contacts the workpiece 13; the measuring probe 10 is locked on the measuring head main body 9 through threads, the measuring probe 10 is used for being in contact with a workpiece 13 and a tool setting gauge 11, and the workpiece is a rectangular glass workpiece.
The cross section of the sliding table 6 is dovetail-shaped and is matched with the guide rail 4; the sliding table 6 is arranged on the guide rail 4 and can slide and lock freely, the knob on the left side of the sliding table 6 is a locking knob, the knob on the right side of the sliding table 6 is a driving knob, the sliding table 6 moves up and down by rotating the knob on the right side, and the sliding table 6 is fixed at a designated position by screwing the knob on the left side. Utilize guide rail 4 and slip table 6 to realize the gauge head and reciprocate, when carrying out the tool setting measurement, move slip table 6 to the guide rail 4 least significant end and lock. When the tool setting measurement is completed, the sliding table 6 is moved to the highest end of the guide rail 4 to be locked, and the main body of the measuring head is screwed down, so that interference generated in the machining process is avoided.
The fixed plate 7 is an L-shaped fixed plate, the side face of the fixed plate 7 is fixed on the sliding table 6 through a bolt, and a cylindrical hole is formed in the bottom of the fixed plate 7 and used for mounting a measuring head.
The installation method of the invention is as follows:
1. firstly, a base plate 3 is arranged on the side wall of a B-axis swing arm 2, and a guide rail 4 is arranged on the side surface of the base plate 3;
2. the sliding table 6 is arranged on the guide rail 4, four mounting holes are formed in the side face of the fixed plate 7, and the fixed plate 7 is fixed on the sliding table 6 through four bolts;
3. a round hole is arranged below the fixing plate 7, and the round hole is matched with the measuring head base 8 through a hole shaft and locked by two set screws;
4. the measuring head main body 9 is in threaded fit with the measuring head base 8, and the measuring needle 10 is in threaded fit with the measuring head main body 9;
5. the tool setting gauge 11 is fixed on a magnetic suction seat 12 through bolts, and the magnetic suction seat 12 is adsorbed on the edge of the workbench.
The operation method of the invention is as follows:
1. determining the horizontal plane relative position of a measuring head and a main shaft of a gasbag polishing machine tool before the tool is set for the first time;
2. rotating the drive knob at the right side of the sliding table 6 to move the measuring head downwards to the lowest point of the guide rail 4, rotating the locking knob at the left side of the sliding table 6 after the measuring head is in place, and fixing the measuring head
3. Inputting the size of the workpiece 13 to be measured in the numerical control interface, the numerical control system will generate the corresponding tool setting and measuring program codes, and clicking the operation program will execute the following steps:
3.1) firstly moving the measuring head to be right above the tool setting gauge 11, then moving the measuring head downwards to trigger the tool setting gauge 11, and determining a height value Z1 of the measuring head relative to the tool setting gauge 11;
3.2) as shown in fig. 4, using the measuring head to take coordinate values of two points on four sides of the rectangular workpiece 13, specifically, taking points from the left side of the workpiece 13, wherein the circle shown in the figure is a safe distance point before each point taking, namely, after the measuring head reaches the safe distance point, the measuring head approaches to the workpiece 13 at a low speed until the measuring head is triggered, the numerical control system records position point coordinates when triggered and in R variables of the numerical control system, eight trigger points correspond to R1-R8, the coordinate of the central point obtained by taking 8 points is more accurate than the coordinate of the central point obtained by taking 4 points, and the algorithm of the plane central point coordinate value (a, b) of the workpiece 13 is as follows:
value of plane center point X axis of workpiece 13: a ═ ((X1+ X6) + (X2+ X5))/4
Value of plane center point Y axis of workpiece 13: b ═ ((Y3+ Y8) + (Y4+ Y7))/4
The deviation value of the placement of the workpiece 13, i.e. the value of X1 in R1 and the value of X2 in R2 are subtracted;
3.3) moving the measuring head to be right above the central point of the workpiece 13, then moving the measuring head downwards to touch the top surface of the workpiece 13, obtaining a height value c of the measuring head relative to the highest point of the upper surface of the workpiece 13, and obtaining coordinate values (a, b and c) of the central point of the workpiece measured by the measuring head, thereby establishing a relative height relationship between the highest point of the upper surface of the workpiece 13 and the tool setting gauge 11;
3.4) rotating the air bag head 5 along the axis of the B-axis swing arm 2 by a certain angle to a working position, moving the air bag head to a position right above the tool setting gauge 11, triggering the tool setting gauge 11 downwards to obtain a height value Z2 of the air bag head 5 relative to the tool setting gauge 11, and thus indirectly obtaining the relative height relation of the air bag head 5 relative to the highest point of the upper surface of the workpiece 13; specifically, the air bag head 5 is moved to trigger the tool setting gauge 11 while the air bag head 5 is rotated at a low speed, so that the lowest point of the spherical air bag is ensured to contact the tool setting gauge 11 and trigger the tool setting gauge 11;
4. after the measurement program is run, the alignment error of the workpiece 13 and the center point coordinate of the workpiece 13 are output to the numerical control interface;
5. after tool setting measurement is completed, a locking knob of the sliding table 6 is loosened, the sliding table 6 is moved to the highest end of the guide rail 4 to be locked, and finally the measuring head main body 9 is screwed down;
6. finally, the obtained origin of the workpiece 13 is substituted into the programmed origin of the program, and the machining can be started.
Claims (3)
1. The utility model provides an automatic tool setting and measure device of work piece central point which characterized in that: comprises a base plate, a guide rail, a sliding table, a fixing plate, a measuring head, a tool setting gauge and a magnetic suction seat; the base plate is fixed on a swing arm of the air bag polishing machine tool, and the guide rail is arranged on the base plate; the sliding table is slidably arranged on the guide rail; the fixed plate is fixedly connected with the sliding table; the measuring head is fixed on the fixing plate; the tool setting gauge is fixed on a magnetic suction seat, and the magnetic suction seat is adsorbed on a workbench: the measuring head comprises a measuring head base, a measuring head main body and a measuring needle; the measuring head base is arranged on the fixing plate and is connected with a signal wire of the air bag polishing machine tool; the measuring head main body is locked on the measuring head base through threads, a sensor is arranged in the measuring head main body, the sensor is a piezoelectric sensor, and an electric signal is generated during mechanical triggering so as to judge whether the measuring head main body is in contact with a workpiece; the measuring needle is locked on the measuring head main body through threads and is used for contacting with a workpiece and the tool setting gauge;
the tool setting method of the device comprises the following steps:
1) determining the horizontal plane relative position of a measuring head and a main shaft of a gasbag polishing machine tool before the tool is set for the first time;
2) moving the measuring head downwards to the lowest point of the guide rail, and fixing the measuring head;
3) operating a tool setting measurement program to establish a relative height relation of the air bag head relative to the highest point of the upper surface of the workpiece;
4) after the measuring program is finished, the alignment error of the workpiece and the coordinates of the central point of the workpiece are output to a numerical control interface;
5) after the tool setting measurement is completed, the sliding table is moved to the highest end of the guide rail and locked, and finally the measuring head main body is screwed down;
the operation method of the step 3) is as follows:
3.1) moving the measuring head to be right above the tool setting gauge, then moving the measuring head downwards to trigger the tool setting gauge, and determining the height value of the measuring head relative to the tool setting gauge;
3.2) using a measuring head to respectively take coordinate values of at least one point on four sides of the rectangular workpiece, respectively adding the coordinate values of opposite sides and dividing the sum by the number of the taken points to obtain the plane center coordinate of the workpiece;
3.3) moving the measuring head to be right above the central point of the workpiece, then moving the measuring head downwards to touch the top surface of the workpiece, and obtaining the height value of the measuring head relative to the highest point of the upper surface of the workpiece, thereby establishing a relative height relation between the highest point of the upper surface of the workpiece and the tool setting gauge;
and 3.4) swinging the air bag head to an inclined working pose, moving the air bag head to a position right above the tool setting gauge, triggering the tool setting gauge downwards, and obtaining the height value of the air bag head relative to the tool setting gauge so as to establish the relative height relation of the air bag head relative to the highest point of the upper surface of the workpiece.
2. The device for automatically setting the tool and measuring the center point of the workpiece according to claim 1, wherein: the sliding table is provided with a locking knob and a driving knob, the locking knob is used for enabling the sliding table to be fixed at a specified position, and the driving knob is used for enabling the sliding table to move up and down.
3. The device for automatically setting the tool and measuring the center point of the workpiece according to claim 1, wherein: the fixed plate is L type fixed plate, and the fixed plate side passes through the bolt fastening on the slip table, and the bottom of fixed plate is equipped with a cylinder hole, and this cylinder hole is used for installing the gauge head.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910834291.7A CN110497315B (en) | 2019-09-04 | 2019-09-04 | Device for automatically setting tool and measuring workpiece central point and tool setting method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910834291.7A CN110497315B (en) | 2019-09-04 | 2019-09-04 | Device for automatically setting tool and measuring workpiece central point and tool setting method |
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| CN110497315A CN110497315A (en) | 2019-11-26 |
| CN110497315B true CN110497315B (en) | 2021-04-27 |
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| CN111975456A (en) * | 2020-07-20 | 2020-11-24 | 湖南中大创远数控装备有限公司 | Online measuring device and machine tool |
| CN112880512B (en) * | 2021-01-13 | 2022-07-29 | 苏州紫金港智能制造装备有限公司 | Device for detecting positioning accuracy in robot plane |
| CN112894031B (en) * | 2021-01-19 | 2022-05-13 | 浙江鑫佳硕科技有限公司 | High-precision workpiece machining system and machining method thereof |
| CN112925264A (en) * | 2021-01-25 | 2021-06-08 | 新代科技(苏州)有限公司 | Method for automatically moving cutter on lathe |
| CN114211328A (en) * | 2021-12-09 | 2022-03-22 | 技感半导体设备(南通)有限公司 | Grinding spindle coordinate measuring method |
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| DE3340311C2 (en) * | 1983-11-08 | 1985-12-12 | Dr. Johannes Heidenhain Gmbh, 8225 Traunreut | Touch and / or measuring device |
| CN102198633B (en) * | 2011-05-11 | 2013-01-23 | 无锡市明鑫数控磨床有限公司 | Post measurement device of vertical grinding machine |
| JP6407812B2 (en) * | 2015-07-14 | 2018-10-17 | ファナック株式会社 | Machine tool control system capable of obtaining workpiece origin and workpiece origin setting method |
| CN205870138U (en) * | 2016-07-08 | 2017-01-11 | 深圳市三维机电设备有限公司 | Automatic accent machine of machining center and on -line measuring system |
| CN209095135U (en) * | 2018-09-14 | 2019-07-12 | 王卫 | A kind of vertical machining centre is with to zero machine of knife school |
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