CN110860949B - Detection device and detection method for positioning precision and repeated positioning precision of numerical control tool rest - Google Patents
Detection device and detection method for positioning precision and repeated positioning precision of numerical control tool rest Download PDFInfo
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- CN110860949B CN110860949B CN201911313882.6A CN201911313882A CN110860949B CN 110860949 B CN110860949 B CN 110860949B CN 201911313882 A CN201911313882 A CN 201911313882A CN 110860949 B CN110860949 B CN 110860949B
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- 238000001514 detection method Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000009434 installation Methods 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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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
- B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
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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
- B23Q17/006—Arrangements for observing, indicating or measuring on machine tools for indicating the presence of a work or tool in its holder
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Abstract
The invention discloses a detection device and a detection method for the positioning precision and the repeated positioning precision of a numerical control tool rest, wherein the detection device comprises a detection table and a detection frame, the detection table is assembled on a lathe bed of a numerical control machine tool, the detection frame is assembled on a cutter head of a tool rest to be detected, an auto-collimator is assembled on the detection table, and the detection frame is assembled with a twenty-four-sided prism which corresponds to the twenty-four-sided prism. The method comprises the following steps: step one, mounting a preset positioning plate on a cutter head; step two, mounting the clamping rod on the cutterhead; step three, installing a detection frame; step four, the basal plane of the twenty-four sides prism corresponds to the corresponding cutter position number; step five, installing a detection table; step six, enabling the base surface to be opposite to the autocollimator; step seven, radial circle runout is smaller than 15 microns; step eight, detecting corresponding precision; step nine, performing forward and backward rotation on five groups of tests; step ten, calculating corresponding precision; the beneficial effects are that: and the quick on-line detection of corresponding precision is carried out, so that the convenience of use is ensured.
Description
Technical Field
The invention relates to a detection device and a detection method for positioning accuracy and repeated positioning accuracy, in particular to a detection device and a detection method for positioning accuracy and repeated positioning accuracy of a numerical control tool rest.
Background
Currently, a numerical control tool rest is used as one of key functional components of a numerical control machine tool, and an accuracy index directly influences the accuracy of a machined workpiece. A series of precision detection indexes of the numerical control tool rest in national standard GB/T20960-2007 are definitely specified, wherein the positioning precision and the repeated positioning precision are precision indexes very important to a manufacturer of the numerical control tool rest in China, the tool rest needs to be detected before leaving a factory, and the tool rest is an important reference item for a user during the selection of the numerical control tool rest.
For the detection method of the positioning precision and the repeated positioning precision, the requirements of national standard GB/T20960-2007 are that the detection is carried out by using a test rod under the condition of no cutterhead. However, the assembly precision of the cutterhead is difficult to ensure after the detection means is used for measuring, the subsequent use is affected, and the requirements of the numerical control tool rest on the degradation condition of the detection positioning precision and the repeated positioning precision after the numerical control tool rest is used for a period of time are very difficult. In addition, the detection method and the detection device for detecting the positioning precision and the repeated positioning precision in the national standard GB/T20960-2007 are not specified, and the operability is not realized.
The methods proposed in the prior patent and literature all need to detach the numerical control tool rest from the machine tool, put the numerical control tool rest on a ground level iron or a test bed for measurement, and mainly include a method for measuring by matching a laser interferometer with a reflector, a method for measuring by matching an encoder with a synchronous shaft, and a method for measuring by matching a metal regular polygon with a photoelectric auto-collimator. Aiming at the method how to coaxially fix the metal regular polyhedron on the cutter head and adjust the coaxiality, the adjusting method proposed by the patent with the application number ZL201710165016.1 can only be blind adjustment, the blind adjustment precision of products with the tolerance of 4-angle seconds is not high, and three groups of fixing bolts are all loosened and readjusted when the method proposed by the patent with the application number 2018102343095 is adjusted each time, so that the actual operation is too difficult and the speed is very slow. In conclusion, the existing method is difficult to popularize in actual detection.
Disclosure of Invention
The invention aims to solve a plurality of problems existing in the use process of the existing numerical control tool rest detection device and detection method, and provides a detection device and a detection method for the positioning precision and repeated positioning precision of a numerical control tool rest.
The invention provides a detection device for the positioning precision and the repeated positioning precision of a numerical control tool rest, which comprises a detection table and a detection frame, wherein the detection table is assembled on a lathe bed of a numerical control machine tool, the detection frame is assembled on a cutter head of a tool rest to be detected, an auto-collimator is assembled on the detection table, and the detection frame is assembled with a twenty-four-face prism body which corresponds to the auto-collimator.
The machine body of the numerical control machine tool is an inclined plane, and the inclined angle of the inclined plane is 30 degrees, 45 degrees or 60 degrees.
The detection table consists of a magnetic seat, a fixing frame, a lifting screw rod and an autocollimator, wherein the magnetic seat is assembled on a lathe bed of a numerical control machine tool, the fixing frame is arranged on the magnetic seat, the lifting screw rod is pivoted on a base of the fixing frame, the autocollimator is connected on the lifting screw rod through a lifting block in a threaded manner, a driving hand wheel is assembled at the top end of the lifting screw rod, and the lifting block can drive the autocollimator to move up and down along the lifting screw rod through shaking the driving hand wheel.
The model of the autocollimator is STD-3032.
The side of the magnetic seat is provided with a magnetic switch, and the magnetic switch is used for controlling the existence of magnetism of the magnetic seat.
The detection frame comprises a twenty-four-sided prism, a pre-positioning base and a cross sliding table, wherein the twenty-four-sided prism is fixed on a sliding block on the cross sliding table through a prism installation shaft, the cross sliding table is fixed on the pre-positioning base, three pre-positioning plates are arranged at the rear part of the pre-positioning base, pre-positioning grooves are formed in each pre-positioning plate, a hexagonal pre-positioning hole is formed in each pre-positioning groove after the three pre-positioning plates are overlapped, positioning pins at the rear part of the pre-positioning base are inserted into the pre-positioning holes, the positions of the pre-positioning holes correspond to the central position of a cutter disc, a plurality of rows of fixing holes are formed in the end part of each pre-positioning plate, each pre-positioning plate is connected into the cutter groove of the cutter disc through the fixing holes, three clamping rods are fixedly connected at the rear part of the pre-positioning base, and the included angles of the adjacent clamping rods are 90 degrees, and the clamping rods are inserted into the cutter groove of the cutter disc.
The cross sliding table is composed of a bottom plate, a horizontal moving plate and a sliding block, wherein the bottom plate is fixedly connected to a preset base, a vertical screw rod is pivoted to the bottom plate, the horizontal moving plate is in threaded connection with the vertical screw rod, a first adjusting wheel is arranged at the top end of the vertical screw rod, the horizontal moving plate can be driven to move up and down along the vertical screw rod through rotation of the first adjusting wheel, the horizontal moving plate is pivoted with the horizontal screw rod, the sliding block is in threaded connection with the horizontal screw rod, a second adjusting wheel is arranged at one end of the horizontal screw rod, and the sliding block can be driven to move left and right along the horizontal screw rod through rotation of the second adjusting wheel.
The circumference of the twenty-four-face prism is provided with twenty-four metal mirror surfaces, each metal mirror surface can carry out mirror reflection on light rays emitted by an auto-collimator assembled on the detection table, a central hole is formed in the middle of the twenty-four-face prism, the central hole of the twenty-four-face prism penetrates through the prism installation shaft to lean against a shaft shoulder of the prism installation shaft during installation, the prism installation shaft is a stepped shaft, the front end of the prism installation shaft is provided with threads, the position of the threads is in threaded connection with a compression block, a flat key is arranged on the prism installation shaft, a sleeve is sleeved on the front portion of the prism installation shaft, a key groove is formed in the position of the sleeve corresponding to the flat key, the rear end of the prism installation shaft is fixed on a sliding block of the cross sliding table, and the coaxiality of the twenty-four-face prism and a cutter disc is quantitatively adjusted through a first adjusting wheel and a second adjusting wheel on the cross sliding table.
The invention provides a detection method for the positioning precision and repeated positioning precision of a numerical control tool rest, which comprises the following steps:
step one, mounting three preset positioning plates on a cutter head of a cutter frame to be tested;
step two, installing three clamping rods on a pre-positioning base, adjusting the position of the pre-positioning base, enabling a positioning pin at the rear part of the pre-positioning base to be arranged in a pre-positioning hole formed by overlapping three pre-positioning plates, and installing the clamping rods on a cutter head in an actual cutter clamping mode;
step three, installing a cross sliding table, a prism installation shaft, a twenty-four-sided prism, a sleeve and a compression block;
Step four, manually rotating the twenty-four sides prism to enable the basal plane of the twenty-four sides prism to correspond to the corresponding cutter position number, and screwing the compaction block;
step five, installing a detection table, so that an autocollimator on the detection table is opposite to a basal plane of the icosahedron;
step six, adjusting the horizontal position of the measured tool rest by adjusting the numerical value of the Z axis of the numerical control machine tool, and adjusting the height of the autocollimator by adjusting the lifting block, so that the basal plane of the icosahedron is opposite to the autocollimator;
step seven, detecting radial circle runout of the prism mounting shaft by a meter marking method, and changing the position of a sliding block on the cross sliding table by matching with a first adjusting wheel and a second adjusting wheel on the cross sliding table to drive the change position of the twenty-four sides prism so as to finely adjust the coaxiality, so that the radial circle runout of the prism mounting shaft is smaller than 15 microns;
Step eight, adjusting the left-right swing angle and the pitch angle of the autocollimator by utilizing a fine adjustment device provided by the autocollimator, so that after the autocollimator is focused on the corresponding surfaces of the twenty-four sides prism, the detection of positioning precision and repeated positioning precision is started;
step nine, rotating a tested tool rest by taking a station as a starting position, changing the tool rest bit by bit, recording the reading of each station, and performing positive and negative rotation on each test five groups;
And step ten, recording data and calculating the positioning precision and repeated positioning precision of the measured tool rest by using the following calculation formula:
(1) The positioning accuracy evaluation method comprises the following steps:
xc (i, j) represents a j-th test value of the i-th station in units of angular seconds, where j=1, 2,..5 represents a forward rotation test, j=6, 7,..10 represents a reverse rotation test, clockwise is defined as forward rotation, counterclockwise is defined as reverse rotation, and positioning accuracy of the j-th test is in units of angular seconds as follows:
cla(j)cla(j)=max(xc(i,j)-min(xc(i,j)),i=1,2,...,imax
the positioning precision of the measured tool rest is expressed by CLA, the unit is an angle second, and the value is
CLA=max(cla(i)),i=1,2,...,imax
(2) The repeated positioning accuracy evaluation method comprises the following steps:
cc (i, j) represents a jth test value of the ith station in degrees seconds, where j=1, 2, & gt, 5 represents a forward rotation test, j=6, 7, & gt, 10 represents a reverse rotation test, and the repeated positioning accuracy rcla (i) of the ith station is
The working principle of the invention is as follows:
The invention provides a detection device and a detection method for the positioning precision and the repeated positioning precision of a numerical control tool rest, wherein the positioning precision refers to the maximum corner error of different tool positions rotating to the participating cutting position, and the repeated positioning precision refers to the maximum corner error of the same tool position rotating to the participating cutting position for a plurality of times. The method comprises the steps that a twenty-four-face prism in a detection device is used as a base surface, each tool position of a tool rest to be detected is provided with a face of the twenty-four-face prism corresponding to the face, the face is adjusted to be parallel to the side face of the corresponding tool position, light emitted by an auto-collimator irradiates on a prism metal mirror surface of the twenty-four-face prism during measurement, the light is returned to the auto-collimator according to a reflection theorem to be received by the auto-collimator, the auto-collimator can read an actual deflection angle when the twenty-four-face prism rotates to a cutting position, and error compensation of the actual deflection angle plus the edge surface of the twenty-four-face prism is equal to a corner error of the tool position relative to the base surface at the moment, and the positioning precision and the repeated positioning precision of the tool rest to be detected can be calculated according to a definition formula of the positioning precision and the repeated positioning precision.
The invention has the beneficial effects that:
The quick online detection device for the positioning precision and the repeated positioning precision of the numerical control tool rest can be installed in different types of horizontal type inclined lathe bed numerical control machine tools, and can be used for quick, simple and convenient quick online detection of the positioning precision and the repeated positioning precision of universality under the condition that a measured tool rest is not detached from a lathe and a cutterhead is not detached.
The quick online detection device for the positioning precision and the repeated positioning precision of the numerical control tool rest has a pre-positioning function, and is combined with a meter-striking method to carry out fine adjustment, so that the adjustment is quicker and more accurate, and the adjustment time before measurement is effectively shortened. Three clamping rods are arranged and are arranged at intervals of 90 degrees, so that the tool rest can adapt to the measured tool rests with different tool positions. The clamping rods in the detection device are independent from the preset base, and the detected tool rest with different tool slot sizes can be adapted by replacing the clamping rods with different sizes; the pre-positioning plate can be provided with a plurality of groups of holes to adapt to threaded holes of different knife grooves. The height of the autocollimator in the detection device can be quickly and conveniently adjusted through the lifting block, and the autocollimator can be suitable for the detected tool rests with different center heights, and belongs to the detection device with universal geometric precision. Sleeve and flat key that have the keyway have been provided with between twenty tetrahedron and compact heap in detection device, drive in order to adjust the twenty tetrahedron of good position and rotate when preventing that the compact heap from screwing up, better assurance the convenience of use.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the detection device according to the present invention.
Fig. 2 is a schematic structural diagram of the detection table according to the present invention.
Fig. 3 is a schematic structural diagram of the magnetic base according to the present invention.
Fig. 4 is a schematic diagram of a mounting structure of the detection frame and the cutterhead.
Fig. 5 is a schematic diagram of an explosion structure of the detection frame according to the present invention.
Fig. 6 is a schematic diagram of a stacked structure of three pre-positioning plates according to the present invention.
FIG. 7 is a schematic view of a combination structure of a pre-positioning plate and a pre-positioning base according to the present invention.
FIG. 8 is a schematic view of the installation structure of the sleeve and the prism installation shaft according to the present invention.
Fig. 9 is a schematic structural view of the cross sliding table.
The labels in the above figures are as follows:
1. The device comprises a detection table 2, a detection frame 3, a numerical control machine 4, a detected tool rest 5, a cutter disc 6, an autocollimator 7, a twenty-four-sided prism 8, a magnetic seat 9, a fixing frame 10, a lifting screw rod 11, a lifting block 12, a driving hand wheel 13, a magnetic switch 14, a pre-positioning base 15, a cross sliding table 16, a prism mounting shaft 17, a sliding block 18, a pre-positioning plate 19, a pre-positioning groove 20, a pre-positioning hole 21, a positioning pin 22, a fixing hole 23, a clamping rod 24, a bottom plate 25, a horizontal moving plate 27, a vertical screw 28, a first adjusting wheel 29, a horizontal screw 30, a second adjusting wheel 31, a metal mirror 32, a pressing block 33, a flat key 34, a sleeve 35 and a key groove.
Detailed Description
Please refer to fig. 1 to 9:
The invention provides a detection device for the positioning precision and the repeated positioning precision of a numerical control tool rest, which comprises a detection table 1 and a detection frame 2, wherein the detection table 1 is assembled on a lathe bed of a numerical control machine tool 3, the detection frame 2 is assembled on a cutterhead 5 of a tool rest 4 to be detected, an autocollimator 6 is assembled on the detection table 1, a twenty-four-face prism 7 is assembled on the detection frame 2, and the autocollimator 6 corresponds to the twenty-four-face prism 7.
The bed of the numerical control machine tool 3 is an inclined plane, and the inclined angle of the inclined plane is 30 degrees, 45 degrees or 60 degrees.
The detection table 1 is composed of a magnetic seat 8, a fixing frame 9, a lifting screw rod 10 and an autocollimator 6, wherein the magnetic seat 8 is assembled on the bed body of the numerical control machine tool 3, the fixing frame 9 is arranged on the magnetic seat 8, the lifting screw rod 10 is pivoted on the base of the fixing frame 9, the autocollimator 6 is screwed on the lifting screw rod 10 through a lifting block 11, the top end of the lifting screw rod 10 is provided with a driving hand wheel 12, and the lifting block 11 can drive the autocollimator 6 to move up and down along the lifting screw rod 10 by shaking the driving hand wheel 12.
The model of the autocollimator 6 is STD-3032.
A magnetic switch 13 is arranged on the side surface of the magnetic seat 8, and the magnetic existence of the magnetic seat 8 is controlled by the magnetic switch 13.
The detection frame 2 comprises a twenty-four-sided prism 7, a pre-positioning base 14 and a cross sliding table 15, wherein the twenty-four-sided prism 7 is fixed on a sliding block 17 on the cross sliding table 15 through a prism installation shaft 16, the cross sliding table 15 is fixed on the pre-positioning base 14, three pre-positioning plates 18 are arranged at the rear part of the pre-positioning base 14, pre-positioning grooves 19 are formed in each pre-positioning plate 18, six prismatic pre-positioning holes 20 are formed in the positions of the pre-positioning grooves 19 after the three pre-positioning plates 18 are overlapped, positioning pins 21 at the rear part of the pre-positioning base 14 are inserted into the pre-positioning holes 20, the positions of the pre-positioning holes 20 correspond to the central position of the cutter disc 5, a plurality of rows of fixing holes 22 are formed in the end part of each pre-positioning plate 18, each pre-positioning plate 18 is connected in the cutter groove of the cutter disc 5 through the fixing holes 22, three clamping rods 23 are fixedly connected at the rear part of the pre-positioning base 14, the included angles of the adjacent clamping rods 23 are 90 degrees, and the clamping rods 23 are inserted into the cutter grooves of the cutter disc 5.
The cross sliding table 15 is composed of a bottom plate 24, a horizontal moving plate 25 and a sliding block 17, wherein the bottom plate 24 is fixedly connected to the pre-positioning base 14, a vertical screw rod 27 is pivoted on the bottom plate 24, the horizontal moving plate 25 is in threaded connection with the vertical screw rod 27, a first adjusting wheel 28 is arranged at the top end of the vertical screw rod 27, the horizontal moving plate 25 can be driven to move up and down along the vertical screw rod 27 through rotation of the first adjusting wheel 28, a horizontal screw rod 29 is pivoted on the horizontal moving plate 25, the sliding block 17 is in threaded connection with the horizontal screw rod 29, a second adjusting wheel 30 is arranged at one end of the horizontal screw rod 29, and the sliding block 17 can be driven to move left and right along the horizontal screw rod 29 through rotation of the second adjusting wheel 30.
The circumference of the twenty-four-face prism 7 is provided with twenty-four metal mirror faces 31, each metal mirror face 31 can carry out mirror reflection on light rays emitted by the auto-collimator 6 assembled on the detection table 1, a central hole is formed in the middle of the twenty-four-face prism 7, the central hole of the twenty-four-face prism 7 penetrates through the prism installation shaft 16 to lean against a shaft shoulder of the prism installation shaft 16 during installation, the prism installation shaft 16 is a stepped shaft, the front end of the prism installation shaft 16 is provided with threads, a compression block 32 is screwed at the position of the threads, a flat key 33 is arranged on the prism installation shaft 16, a sleeve 34 is sleeved at the front part of the prism installation shaft 16, a key groove 35 is formed at the position of the sleeve 34 corresponding to the flat key 33, the rear end of the prism installation shaft 16 is fixed on a sliding block 17 of the cross sliding table 15, and the coaxiality of the twenty-face prism 7 and the cutter head 5 is quantitatively adjusted through a first adjusting wheel 28 and a second adjusting wheel 30 on the cross sliding table 15.
The invention provides a detection method for the positioning precision and repeated positioning precision of a numerical control tool rest, which comprises the following steps:
step one, three pre-positioning plates 18 are arranged on a cutter head 5 of a cutter frame 4 to be tested;
Step two, installing three clamping rods 23 on the pre-positioning base 14, adjusting the position of the pre-positioning base 14, enabling a positioning pin 21 at the rear part of the pre-positioning base 14 to be placed in a pre-positioning hole 20 formed by overlapping three pre-positioning plates 18, and then installing the clamping rods 23 on the cutter head 5 in a mode of clamping an actual cutter;
Step three, mounting a cross sliding table 15, a prism mounting shaft 16, a twenty-four sided prism 7, a sleeve 34 and a compression block 32;
step four, manually rotating the twenty-four sides of the prism 7 to enable the basal plane of the twenty-four sides of the prism 7 to correspond to the corresponding cutter position number, and screwing the compaction block 32;
Step five, installing the detection table 1, and enabling the autocollimator 6 on the detection table 1 to be opposite to the basal plane of the icosahedron 7;
Step six, adjusting the horizontal position of the measured tool rest 4 by adjusting the value of the Z axis of the numerical control machine tool 3, and adjusting the height of the autocollimator 6 by adjusting the lifting block 11, so that the basal plane of the icosahedron 7 is opposite to the autocollimator 6;
Step seven, detecting radial circle runout of the prism mounting shaft 16 by a meter striking method, and changing the position of a sliding block 17 on the cross sliding table 15 by matching with a first adjusting wheel 28 and a second adjusting wheel 30 on the cross sliding table 15 to drive the change position of the twenty-four-sided prism 7 so as to finely adjust the coaxiality, so that the radial circle runout of the prism mounting shaft 16 is smaller than 15 microns;
step eight, adjusting the left-right swing angle and the pitch angle of the autocollimator by utilizing a fine adjustment device provided by the autocollimator 6, so that after the corresponding surfaces of the autocollimator 6 and the twenty-four sides prism 7 are focused, starting to detect the positioning precision and the repeated positioning precision;
Step nine, rotating a tested tool rest 4 by taking a station as a starting position, changing the tool bit by bit, recording the reading of each station, and performing positive and negative rotation on each test five groups;
And step ten, recording data and calculating the positioning precision and repeated positioning precision of the measured tool rest 4 by using the following calculation formula:
(1) The positioning accuracy evaluation method comprises the following steps:
xc (i, j) represents a j-th test value of the i-th station in units of angular seconds, where j=1, 2,..5 represents a forward rotation test, j=6, 7,..10 represents a reverse rotation test, clockwise is defined as forward rotation, counterclockwise is defined as reverse rotation, and positioning accuracy of the j-th test is in units of angular seconds as follows:
cla9j)cla(j)=max(xc(i,j))-min(xc(i,j)),i=1,2,...,imax
The positioning precision of the measured tool rest is expressed by C L A, the unit is an angle second, and the value is
CLA=max(cla(i)),i=1,2,...,imax
(2) The repeated positioning accuracy evaluation method comprises the following steps:
c c (i, j) represents a jth test value of the ith station in terms of an angular second, where j=1, 2, & gt, 5 represents a forward rotation test, j=6, 7, & gt, 10 represents a reverse rotation test, and the repeated positioning accuracy rcs (i) of the ith station is
The working principle of the invention is as follows:
The invention provides a detection device and a detection method for the positioning precision and the repeated positioning precision of a numerical control tool rest, wherein the positioning precision refers to the maximum corner error of different tool positions rotating to the participating cutting position, and the repeated positioning precision refers to the maximum corner error of the same tool position rotating to the participating cutting position for a plurality of times. The twenty-four-face prism 7 in the detection device is used as a base surface, each tool position of the measured tool rest 4 is provided with a face of the twenty-four-face prism 7 corresponding to the face, the face is adjusted to be parallel to the side surface of the corresponding tool position, during measurement, the autocollimator 6 emits light to irradiate the metal mirror surface 31 of the twenty-four-face prism 7, the light is returned to be received by the autocollimator 6 according to the reflection theorem, the autocollimator 6 can read the actual deflection angle when the twenty-four-face prism 7 rotates to the cutting position, the error compensation of the edge surface of the actual deflection angle plus the twenty-four-face prism 7 is equal to the corner error of the tool position relative to the base surface at the moment, and the positioning precision and the repeated positioning precision of the measured tool rest 4 can be calculated according to the definition formula of the positioning precision and the repeated positioning precision.
Claims (5)
1. The utility model provides a detection device of numerical control knife rest positioning accuracy and repeated positioning accuracy, including detecting platform and detection frame, wherein the detecting platform assembly is on the lathe bed of digit control machine tool, and the detection frame assembly is equipped with the autocollimator on the blade disc of being surveyed the knife rest on the detecting platform, is equipped with the icosahedron on the detection frame, and autocollimator corresponds its characterized in that with the icosahedron, the autocollimator: the detection frame comprises a twenty-four-sided prism, a pre-positioning base and a cross sliding table, wherein the twenty-four-sided prism is fixed on a sliding block on the cross sliding table through a prism installation shaft, the cross sliding table is fixed on the pre-positioning base, three pre-positioning plates are arranged at the rear part of the pre-positioning base, each pre-positioning plate is provided with a pre-positioning groove, a hexagonal pre-positioning hole is formed at the pre-positioning groove after the three pre-positioning plates are overlapped, a positioning pin at the rear part of the pre-positioning base is inserted in the pre-positioning hole, the position of the pre-positioning hole corresponds to the central position of a cutter disc, the end part of each pre-positioning plate is provided with a plurality of rows of fixing holes, each pre-positioning plate is connected in a cutter groove of the cutter disc through the fixing holes, the rear part of the pre-positioning base is fixedly connected with three clamping rods, the included angles of the adjacent clamping rods are 90 DEG, each clamping rod is inserted in the cutter groove of the cutter disc, the cross sliding table is composed of a bottom plate, a horizontal moving plate and the sliding block, the bottom plate is fixedly connected to the pre-positioning base, a vertical screw is pivoted on the bottom plate, the horizontal moving plate is screwed on the vertical screw, the horizontal moving plate is screwed on the vertical screw, the top, the vertical screw is horizontally moves the horizontal adjusting screw, the horizontal adjusting screw and can horizontally move along the first screw, and horizontally and can horizontally move the adjusting screw, and horizontally move the screw; the detection table consists of a magnetic seat, a fixing frame, a lifting screw rod and an autocollimator, wherein the magnetic seat is assembled on a lathe bed of a numerical control machine tool, the fixing frame is arranged on the magnetic seat, the lifting screw rod is pivoted on a base of the fixing frame, the autocollimator is connected on the lifting screw rod through a lifting block in a threaded manner, a driving hand wheel is assembled at the top end of the lifting screw rod, and the lifting block can drive the autocollimator to move up and down along the lifting screw rod through shaking the driving hand wheel.
2. The device for detecting the positioning accuracy and the repeated positioning accuracy of the numerical control tool rest according to claim 1, wherein the device comprises: the lathe bed of digit control machine tool be the inclined plane, the inclination angle of inclined plane is 30 or 45 or 60.
3. The device for detecting the positioning accuracy and the repeated positioning accuracy of the numerical control tool rest according to claim 1, wherein the device comprises: the side of the magnetic seat is provided with a magnetic switch, and the magnetic switch is used for controlling the existence of magnetism of the magnetic seat.
4. The device for detecting the positioning accuracy and the repeated positioning accuracy of the numerical control tool rest according to claim 1, wherein the device comprises: the circumference of the twenty-four-face prism is provided with twenty-four metal mirror surfaces, each metal mirror surface can carry out mirror reflection on light rays emitted by an auto-collimator assembled on the detection table, a central hole is formed in the middle of the twenty-four-face prism, the central hole of the twenty-four-face prism penetrates through the prism installation shaft to lean against the shaft shoulder of the prism installation shaft during installation, the prism installation shaft is a stepped shaft, the front end of the prism installation shaft is provided with threads, the position of the threads is in threaded connection with a compression block, a flat key is arranged on the prism installation shaft, a sleeve is sleeved on the front portion of the prism installation shaft, a key groove is formed in the position of the sleeve corresponding to the flat key, the rear end of the prism installation shaft is fixed on a sliding block of the cross sliding table, and the coaxiality of the twenty-four-face prism and a cutter disc is quantitatively adjusted through a first adjusting wheel and a second adjusting wheel on the cross sliding table.
5. A detection method for the positioning precision and repeated positioning precision of a numerical control tool rest is characterized by comprising the following steps: the method is as follows:
step one, mounting three preset positioning plates on a cutter head of a cutter frame to be tested;
step two, installing three clamping rods on a pre-positioning base, adjusting the position of the pre-positioning base, enabling a positioning pin at the rear part of the pre-positioning base to be arranged in a pre-positioning hole formed by overlapping three pre-positioning plates, and installing the clamping rods on a cutter head in an actual cutter clamping mode;
step three, installing a cross sliding table, a prism installation shaft, a twenty-four-sided prism, a sleeve and a compression block;
Step four, manually rotating the twenty-four sides prism to enable the basal plane of the twenty-four sides prism to correspond to the corresponding cutter position number, and screwing the compaction block;
step five, installing a detection table, so that an autocollimator on the detection table is opposite to a basal plane of the icosahedron;
step six, adjusting the horizontal position of the measured tool rest by adjusting the numerical value of the Z axis of the numerical control machine tool, and adjusting the height of the autocollimator by adjusting the lifting block, so that the basal plane of the icosahedron is opposite to the autocollimator;
step seven, detecting radial circle runout of the prism mounting shaft by a meter marking method, and changing the position of a sliding block on the cross sliding table by matching with a first adjusting wheel and a second adjusting wheel on the cross sliding table to drive the change position of the twenty-four sides prism so as to finely adjust the coaxiality, so that the radial circle runout of the prism mounting shaft is smaller than 15 microns;
Step eight, adjusting the left-right swing angle and the pitch angle of the autocollimator by utilizing a fine adjustment device provided by the autocollimator, so that after the autocollimator is focused on the corresponding surfaces of the twenty-four sides prism, the detection of positioning precision and repeated positioning precision is started;
step nine, rotating a tested tool rest by taking a station as a starting position, changing the tool rest bit by bit, recording the reading of each station, and performing positive and negative rotation on each test five groups;
And step ten, recording data and calculating the positioning precision and repeated positioning precision of the measured tool rest by using the following calculation formula:
(1) The positioning accuracy evaluation method comprises the following steps:
xc (i, j) represents a j-th test value of the i-th station in units of angular seconds, where j=1, 2,..5 represents a forward rotation test, j=6, 7,..10 represents a reverse rotation test, clockwise is defined as forward rotation, counterclockwise is defined as reverse rotation, and positioning accuracy of the j-th test is in units of angular seconds as follows:
cla(j)cla(j)=max(xc(i,j))-min(xc(i,j)),i=1,2,...,imax
the positioning precision of the measured tool rest is expressed by CLA, the unit is an angle second, and the value is
CLA=max(cla(i)),i=1,2,...,imax
(2) The repeated positioning accuracy evaluation method comprises the following steps:
cc (i, j) represents a jth test value of the ith station in degrees seconds, where j=1, 2, & gt, 5 represents a forward rotation test, j=6, 7, & gt, 10 represents a reverse rotation test, and the repeated positioning accuracy rcla (i) of the ith station is
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CN112461071B (en) * | 2020-11-20 | 2023-12-01 | 中国人民解放军63698部队 | Method for measuring repeated installation errors of inertial navigation equipment |
CN114473634B (en) * | 2022-03-10 | 2022-11-11 | 纽威数控装备(苏州)股份有限公司 | Precision detection method and device for numerical control tool rest |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106736860A (en) * | 2017-03-20 | 2017-05-31 | 吉林大学 | A kind of performance parameter on-line measuring device of numerically-controlled slide |
CN208117408U (en) * | 2018-03-21 | 2018-11-20 | 吉林大学 | Knife rest positioning accuracy and repetitive positioning accuracy detection device |
CN211136515U (en) * | 2019-12-19 | 2020-07-31 | 吉林大学 | Detection device for numerical control tool rest positioning accuracy and repeated positioning accuracy |
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CN108177024B (en) * | 2018-03-21 | 2023-10-24 | 吉林大学 | Tool rest positioning precision and repeated positioning precision detection device and use method |
CN208125348U (en) * | 2018-03-21 | 2018-11-20 | 吉林大学 | Numerical control horizontal servo saddle rigidity detection device |
CN108151989B (en) * | 2018-03-21 | 2023-09-19 | 吉林大学 | CNC horizontal servo tool holder rigidity detection device and method of use |
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CN208663297U (en) * | 2018-09-07 | 2019-03-29 | 吉林大学 | Test device for machining accuracy and rotation accuracy retention of CNC tool rest |
-
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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CN208117408U (en) * | 2018-03-21 | 2018-11-20 | 吉林大学 | Knife rest positioning accuracy and repetitive positioning accuracy detection device |
CN211136515U (en) * | 2019-12-19 | 2020-07-31 | 吉林大学 | Detection device for numerical control tool rest positioning accuracy and repeated positioning accuracy |
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