CN113377068A - Online measurement method and device for radius compensation value of cutter for numerical control milling of precise minor arc - Google Patents
Online measurement method and device for radius compensation value of cutter for numerical control milling of precise minor arc Download PDFInfo
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- CN113377068A CN113377068A CN202110669597.9A CN202110669597A CN113377068A CN 113377068 A CN113377068 A CN 113377068A CN 202110669597 A CN202110669597 A CN 202110669597A CN 113377068 A CN113377068 A CN 113377068A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/404—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
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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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
Abstract
The invention discloses a method and a device for online measuring a tool radius compensation value of a precise minor arc of a numerical control milling machine, wherein the measuring method comprises the steps of placing a standard block with a groove on a workbench, determining an auxiliary circle by using a measuring needle in a lever dial indicator, and tangency the auxiliary circle with the midpoint of the minor arc; determining corresponding X value and Y value according to the coordinate value of the origin of the minor arc and the coordinate value of the circle center of the auxiliary circle; moving the machine tool workbench to enable the main shaft of the machine tool to reach the circle center position of the auxiliary circle; then moving a main shaft of the machine tool, enabling a measuring needle in a lever dial indicator to be in contact with the minor arc, recording the number of grids of the dial deviating from the zero position, and calculating the actual radius of the minor arc according to the recorded number of grids; and finally, calculating the corresponding compensation value according to the actual radius and the theoretical radius of the minor arc and the machining precision of the minor arc. The online measuring method and the device have the advantages of simple structure, convenient operation and use, high processing efficiency and precision, strong practicability and suitability for popularization and application.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a method and a device for online measuring a radius compensation value of a cutter for numerically-controlled milling of a precise minor arc.
Background
In the field of machining, parts with different structural types can be involved, in the field of aviation, a plurality of special-shaped pieces with complex structures can be involved, and a lock hook part shown in fig. 1 is a typical special-shaped piece, and because the shape of the lock hook part is formed by a curved surface, the lock hook part cannot be measured by a conventional measuring tool, and can only be measured by projection and three-coordinate measurement. According to design requirements, A, B, C places of the part are all minor arcs, and the machining precision of the minor arcs at the places has higher requirements, and the minor arcs refer to arcs smaller than semi-circles.
For such a special-shaped piece, when the numerical control machining center is used for machining, the outer dimension is not known and cannot be measured on a machine tool when the outer program is finished, the outer dimension can only be measured in a projection mode, and when the outer dimension is unqualified, secondary machining is required. And during secondary processing, the workpiece needs to be clamped and aligned again, and if the state of the workpiece is inconsistent with that during primary clamping, the inconsistency between the compensation value and the measured value can be found through numerical control secondary processing, so that the workpiece is scrapped. For the special-shaped piece, in order to ensure that the product meets the standard requirement and meets the use requirement of a user, the alignment device is designed, automatic alignment and online measurement are realized by utilizing the lever principle through a lever dial indicator, secondary processing is avoided, the processing efficiency can be improved, the lead cycle of the product is finished in advance, and the manufacturing cost of an enterprise can be reduced.
Disclosure of Invention
The invention aims to solve the technical problems in the background art, realizes automatic alignment and online measurement by utilizing a lever dial indicator, avoids secondary processing, realizes primary clamping, and realizes precision processing of a minor arc through a tool compensation instruction of a machine tool, in particular to a method and a device for online measurement of a radius compensation value of a cutter for numerical control milling precision minor arc.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a numerical control milling precision minor arc cutter radius compensation value online measurement method comprises the following steps:
(1) the method comprises the steps that a standard block with a groove is placed on a workbench of a numerical control machine tool, a lever dial indicator is rotated through a machine tool spindle, a measuring needle in the lever dial indicator is in contact with the inner walls of the two sides of the groove in the standard block, an auxiliary circle is determined through the width of the groove, the coordinate value of the circle center of the auxiliary circle is determined through CAD drawing software, the determined auxiliary circle is tangent to the midpoint of a minor arc to be numerically controlled and milled in a workpiece on the workbench, and meanwhile, a pointer in the lever dial indicator (1) is adjusted to point to a zero position;
(2) determining the theoretical radius of a minor arc to be subjected to numerical control milling by utilizing a processing coordinate system during workpiece processing, namely a coordinate value of a processing reference, and calculating the distance corresponding to the center of the auxiliary circle from the origin of the minor arc according to the coordinate value of the origin of the minor arc and the coordinate value of the center of the auxiliary circle, thereby determining the corresponding X value and the corresponding Y value;
(3) according to the determined X value and Y value, inputting codes corresponding to the X value and the Y value in a manual input program control mode in the numerical control machine tool, and moving a machine tool workbench to enable a machine tool spindle to be accurate to a circle center coordinate value corresponding to the circle center position of the auxiliary circle to obtain an auxiliary measuring point; then moving a machine tool spindle, enabling a measuring needle in a lever dial indicator to be in contact with a minor arc midpoint to be numerically controlled and milled in a workpiece, recording the number of lattice degrees of a dial plate in the lever dial indicator deviating from a zero position, and calculating the actual radius of the minor arc according to the recorded lattice degrees;
(4) and comparing the calculated actual radius with the theoretical radius of the minor arc, calculating a corresponding compensation value according to the machining precision of the minor arc, wherein the compensation value is a tool radius compensation value required to be determined during tool compensation, and finally inputting the compensation value in a numerical control machine tool to complete the precise minor arc machining through a tool compensation instruction of the machine tool.
Further, the tool radius compensation value online measurement method for the numerical control milling precision minor arc is characterized in that the standard block is of a cylindrical structure, the width of a groove in the standard block is smaller than the radius of the minor arc in a workpiece, the lever dial indicator is arranged right above the standard block through a machine tool spindle, and a measurement needle in the lever dial indicator is located at the center of the standard block.
Further, in the step (3), in the process of moving the spindle of the machine tool, when a measuring pin in a lever dial indicator is in contact with a midpoint of an inferior arc to be numerically controlled and milled in a workpiece, if the degree of a zero position of a dial in the lever dial indicator is a deviation generated by compression, the actual radius of the inferior arc is equal to the theoretical radius plus 0.01-fold degree; if the number of the grids of the dial in the lever dial indicator at the zero position is the deviation generated by stretching, the actual radius of the minor arc is equal to the theoretical radius minus 0.01 multiplied number of the grids.
Further, in the step (4), if the actual radius of the minor arc is smaller than the theoretical radius, the compensation value is the difference between the minor arc tolerance band and the theoretical radius, and if the actual radius of the minor arc is larger than the theoretical radius, the compensation value is the difference between the actual radius and the minor arc tolerance band.
The invention also provides a device for the online measurement method of the cutter radius compensation value of the numerical control milling precision minor arc, which comprises a standard block, a lever dial indicator, a dovetail seat and a universal mechanism, wherein the standard block is of a cylindrical structure, a groove is arranged at the center of the standard block along the axial direction of the standard block, the lever dial indicator is of a front surface type structure with the division value of 0.01mm, a freely rotatable measuring needle is arranged in the lever dial indicator, the measuring needle is in contact with the groove in the standard block, the dovetail seat is arranged at the top of the lever dial indicator, and the universal mechanism is fixedly connected with the dovetail seat. The universal mechanism comprises a universal connecting rod, an adjusting block, a lower adjusting screw, an upper connecting rod universal head and an upper connecting rod, wherein the universal connecting rod is provided with a universal ball head, the lower end of the universal connecting rod is fixed in the dovetail seat, the upper end of the universal ball head is rotatably connected with the adjusting block through the lower adjusting screw, the lower end of the upper connecting rod universal head is rotatably connected with the adjusting block through the upper adjusting screw, and the upper end of the upper connecting rod universal head is fixedly connected with the upper connecting rod; the adjusting block comprises a left clamping plate, a fixed screw, a right clamping plate and a limiting shaft, the limiting shaft is arranged between the left clamping plate and the right clamping plate, the two end faces of the limiting shaft are provided with threaded holes matched with the fixed screw, and the fixed screw is fixedly connected with the left clamping plate and the right clamping plate through the threaded holes in the limiting shaft respectively.
Compared with the prior art, the numerical control milling precision minor arc cutter radius compensation value online measurement method and device have the beneficial effects that: according to the method, an auxiliary circle is drawn by using a lever dial indicator through a set standard block, the auxiliary circle is tangent to the midpoint of the minor arc in a workpiece, a measuring needle in the lever dial indicator is contacted with the minor arc, the dial in the lever dial indicator deviates from the zero position, the actual radius of the minor arc can be determined, meanwhile, according to the machining precision of the minor arc, a compensation value is determined through a minor arc tolerance zone, the compensation value is input into a numerical control machine tool, and the precise minor arc machining is completed through a machine tool compensation instruction, so that one-time clamping is realized, and the precise machining of the minor arc is completed. And by using a lever dial indicator, the radius of the tangent point of the two tangent circles is measured to determine the radius of the arc surface of the other workpiece to be machined tangent to the two tangent circles, so that compensation machining is controlled and completed. The measuring method can be applied to the tangent circle determined by the positions of two circle centers, and can determine the radius of another circular arc by the radius size of a tangent point, or can determine the radius of another processed circular arc surface tangent to the tangent circle by the radius size of the tangent point of the measurable tangent circle. Therefore, by adopting the online measurement method and the device, the lever dial indicator is used for contact measurement, the measurement result has high precision, the operation is convenient, meanwhile, after the workpiece is processed, the working efficiency can be improved through online measurement, the problem of positioning error caused by secondary clamping is avoided, the online measurement method and the device have the advantages of simple structure, convenience in operation and use, improvement of the processing efficiency and the processing precision of the workpiece, realization of high-efficiency accurate forming of an accurate minor arc, realization of the processing precision, satisfaction of the use requirements of users, strong practicability and suitability for popularization and application.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a shackle component;
FIG. 2 is a schematic diagram of the construction of the apparatus of the present invention;
FIG. 3 is a schematic structural diagram of a hook component to be measured;
FIG. 4 is a schematic diagram of an on-line measurement scheme using the apparatus of the present invention;
FIG. 5 is a schematic view of the auxiliary circle tangent to the minor arc of FIG. 4;
FIG. 6 is a schematic diagram of the lever dial indicator of the present invention drawing an auxiliary circle using a standard block.
Shown in the figure: 1-standard block, 2-lever dial indicator, 3-dovetail seat, 4-universal connecting rod, 5-left clamping plate, 6-lower adjusting screw, 7-fixing screw, 8-upper adjusting screw, 9-upper connecting rod universal head, 10-upper connecting rod, 11-right clamping plate, 12-limiting shaft and 13-measuring needle.
Detailed Description
To further illustrate the concepts of the present invention, embodiments of the present invention will be described in further detail below with reference to the following drawings:
because the machining precision requirements related to A, B, C minor arcs in fig. 1 are high, when a numerical control machining center performs machining, when a contour program is finished, the contour size is not known, and no method is available for measurement on a machine tool, so that the machining precision requirements cannot be met. Therefore, design a standard block to open a recess at the standard block, the width of recess can be according to the minor arc condition of difference, can design different specifications, in order to satisfy convenient to use, this application the recess width design three kinds of specifications, be 20mm, 12mm and 8mm respectively. The specification that this application adopted is that the recess width is 20 mm. The working principle of the numerical control milling machine is that a lever dial indicator 2 is utilized, the lever dial indicator 2 is firstly installed on a main shaft of the machine tool, the lever dial indicator 2 is rotated, a circle with the diameter of 20mm is firstly determined through the width of a groove, then a pointer of the lever dial indicator 2 points to a zero position, and the lever dial indicator 2 is rotated through the main shaft, so that a measuring needle 13 of the lever dial indicator 2 rotates around an outer circle with the diameter of phi 20 and is tangent to a minor arc to be precisely numerically controlled and milled.
The lever dial gauge 2, also called lever gauge or a look-up table, is a measuring instrument for measuring geometrical errors and mutual position correctness of workpieces and measuring the length by a comparison method, which utilizes a lever-gear transmission mechanism or a lever-screw transmission mechanism to change the size into angular displacement of a pointer and indicate the length size value. The lever dial indicator 2 adopted by the invention is a commonly used lever dial indicator 2 in the prior art, and a front surface type structure with a division value of 0.01mm is selected, so that the numerical value can be conveniently and directly read.
As shown in fig. 2 to 6, the device for the online measurement of the radius compensation value of the tool for the numerical control milling of the precise minor arc comprises a standard block 1, a lever dial indicator 2, a dovetail seat 3 and a universal mechanism, wherein the standard block 1 is of a cylindrical structure, a groove is formed in the center of the standard block 1 along the axial direction of the standard block, the lever dial indicator 2 is of a front structure with a division value of 0.01mm, a freely rotatable measurement needle 13 is arranged in the lever dial indicator 2, the measurement needle 13 is in contact with the groove in the standard block 1, the dovetail seat 3 is arranged at the top of the lever dial indicator 2, and the universal mechanism is fixedly connected with the dovetail seat 3. The universal mechanism comprises a universal connecting rod 4, an adjusting block, a lower adjusting screw 6, an upper adjusting screw 8, an upper connecting rod universal head 9 and an upper connecting rod 10, wherein the universal connecting rod 4 is provided with a universal ball head, the lower end of the universal connecting rod 4 is fixed in the dovetail seat 3, the upper end with the universal ball head is rotatably connected with the adjusting block through the lower adjusting screw 6, the lower end of the upper connecting rod universal head 9 is rotatably connected with the adjusting block through the upper adjusting screw 8, and the upper end of the upper connecting rod universal head is fixedly connected with the upper connecting rod 10; wherein the regulating block is including left grip block 5, fixed screw 7, right grip block 11 and spacing axle 12, spacing axle 12 sets up between left grip block 5 and right grip block 11, and the both ends face of spacing axle 12 be equipped with fixed screw 7 assorted screw hole, fixed screw 7 through the screw hole in the spacing axle 12 respectively with left grip block 5 and right grip block 11 fixed connection.
The device is used for the numerical control milling precision minor arc cutter radius compensation value on-line measurement method, and comprises the following steps:
(1) the method comprises the steps that a standard block 1 with a groove is placed on a workbench of a numerical control machine tool, a lever dial indicator 2 is rotated through a machine tool spindle, a measuring needle 13 in the lever dial indicator 2 is in contact with the inner walls of the two sides of the groove in the standard block 1, an auxiliary circle is determined through the width of the groove, the coordinate value of the circle center of the auxiliary circle is determined through CAD drawing software, the determined auxiliary circle is tangent to the midpoint of a minor arc to be numerically controlled and milled in a workpiece on the workbench, and meanwhile, a pointer in the lever dial indicator 1 is adjusted to point to a zero position;
(2) determining the theoretical radius of a minor arc to be subjected to numerical control milling by utilizing a processing coordinate system during workpiece processing, namely a coordinate value of a processing reference, and calculating the distance corresponding to the center of the auxiliary circle from the origin of the minor arc according to the coordinate value of the origin of the minor arc and the coordinate value of the center of the auxiliary circle, thereby determining the corresponding X value and the corresponding Y value;
(3) according to the determined X value and Y value, inputting codes corresponding to the X value and the Y value in a manual input program control mode in the numerical control machine tool, and moving a machine tool workbench to enable a machine tool spindle to be accurate to a circle center coordinate value corresponding to the circle center position of the auxiliary circle to obtain an auxiliary measuring point; then moving a machine tool main shaft, enabling a measuring needle 13 in the lever dial indicator 2 to be in contact with the midpoint of the minor arc to be numerically controlled and milled in the workpiece, recording the number of grids of the dial plate in the lever dial indicator 2 deviating from the zero position, and calculating the actual radius of the minor arc according to the recorded number of grids;
(4) and comparing the calculated actual radius with the theoretical radius of the minor arc, calculating a corresponding compensation value according to the machining precision of the minor arc, wherein the compensation value is a tool radius compensation value required to be determined during tool compensation, and finally inputting the compensation value in a numerical control machine tool to complete the precise minor arc machining through a tool compensation instruction of the machine tool.
Further, the tool radius compensation value online measurement method for the numerical control milling precision minor arc is characterized in that the standard block 1 is of a cylindrical structure, the width of a groove in the standard block 1 is smaller than the radius of the minor arc in a workpiece, the lever dial indicator 2 is arranged right above the standard block 1 through a machine tool spindle, and the measuring needle 13 in the lever dial indicator 2 is located at the center of the standard block 1.
Further, in the step (3), in the process of moving the spindle of the machine tool, when the measuring pin 13 in the lever dial indicator 2 is in contact with the midpoint of the minor arc to be numerically controlled and milled in the workpiece, if the number of the grids of the dial plate in the lever dial indicator 2 at the zero position is a deviation generated by compression, the actual radius of the minor arc is equal to the theoretical radius plus 0.01-grid number; if the number of the grids of the dial in the lever dial indicator 2 at the zero position is the deviation generated by stretching, the actual radius of the minor arc is equal to the theoretical radius minus 0.01 multiplied number of the grids.
Further, in the step (4), if the actual radius of the minor arc is smaller than the theoretical radius, the compensation value is the difference between the minor arc tolerance band and the theoretical radius, and if the actual radius of the minor arc is larger than the theoretical radius, the compensation value is the difference between the actual radius and the minor arc tolerance band.
In a specific application process, the device is applied to an online measuring method of the tool radius compensation value of the minor arc, the minor arc at the position A is measured as an example, the dimension of the minor arc at the position A is R30h9, and the specific measuring steps are as follows:
firstly, a standard block with the groove width of 20mm is made, a lever dial indicator 2 is installed on a main shaft of a machine tool through an upper connecting rod 10, the lever dial indicator 2 is rotated so as to determine an auxiliary circle with the size of 20mm, then a pointer of the lever dial indicator 2 points to a zero position, and the main shaft rotates the lever dial indicator 2 so that a measuring needle 13 of the lever dial indicator 2 rotates around an outer circle with the diameter of phi 20 and is tangent to a minor arc to be precisely numerically controlled and milled.
The coordinate value of the workpiece machining reference is used to specify the origin of machining, which is also the machine tool G54 point. The accuracy of the machine tool has three decimal places, so that the measurement requirement can be met, and the compensation value of R30 at the point A is indirectly measured through the auxiliary circle. Inputting G0G 90G 54X-30.29Y-26.13 in an MDI mode, moving a machine tool to the center of an auxiliary circle outside an original point, namely X-30.29 and Y-26.13, which is the central point of the auxiliary circle phi 20, moving a main shaft to enable a measuring needle 13 of a lever dial indicator 2 to contact a workpiece, rotating the main shaft at the moment, wherein the main shaft is equivalent to the point of tangency of a tool phi 20 and R30, and looking at the number of grids of the dial plate in the lever dial indicator 2 deviating from a zero position, if the number of the grids of the dial plate in the lever dial indicator 2 at the zero position is the deviation generated by compression, the actual radius of a minor arc is equal to the theoretical radius plus 0.01 multiplied grid number; if the number of the grids of the dial in the lever dial indicator 2 at the zero position is the deviation generated by stretching, the actual radius of the minor arc is equal to the theoretical radius minus 0.01 multiplied number of the grids. And then comparing the calculated actual radius with the theoretical radius of the minor arc, calculating a corresponding compensation value according to the machining precision of the minor arc, wherein the compensation value is a tool radius compensation value required to be determined during tool compensation, and finally inputting the compensation value in a numerical control machine tool to complete the precise minor arc machining through a tool compensation instruction of the machine tool. If the difference value between the actual radius and the theoretical radius is 0.1, the difference is 0.1 when the minor arc radius to be processed reaches R30, and meanwhile, according to the precision requirement, namely the precision required by the minor arc radius is R30.07-R30.0, the radius compensation value of the cutter required to be determined during cutter compensation is 0.03-0.1.
And for the inferior arc R52 of B and the inferior arc R42 at C, the measuring method is the same as that of the inferior arc R30 at A.
The measuring method can be applied to the tangent circle determined by the positions of two circle centers, and can determine the radius of another circular arc by the radius size of a tangent point, or can determine the radius of another processed circular arc surface tangent to the tangent circle by the radius size of the tangent point of the measurable tangent circle.
Therefore, by adopting the online measurement method and the device, the lever dial indicator 2 is used for contact measurement, the measurement result has high precision, the operation is convenient, meanwhile, after the workpiece is processed, the working efficiency can be improved through online measurement, the problem of positioning error caused by secondary clamping is avoided, the online measurement method and the device have the advantages of simple structure and convenience in operation and use, the processing efficiency and the processing precision of the workpiece are improved, the high-efficiency accurate forming of accurate minor arcs can be realized, the processing precision is achieved, the use requirement of a user is met, the practicability is high, and the device is suitable for popularization and application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A numerical control milling precision minor arc cutter radius compensation value online measurement method is characterized by comprising the following steps:
(1) the method comprises the steps that a standard block (1) with a groove is placed on a workbench of a numerical control machine tool, a lever dial indicator (2) is rotated through a machine tool spindle, a measuring needle (13) in the lever dial indicator (2) is in contact with the inner walls of two sides of the groove in the standard block (1), an auxiliary circle is determined through the width of the groove, the coordinate value of the center of the auxiliary circle is determined through CAD drawing software, the determined auxiliary circle is tangent to the midpoint of a minor arc to be numerically controlled and milled in a workpiece on the workbench, and meanwhile, a pointer in the lever dial indicator (1) is adjusted to point to a zero position;
(2) determining the theoretical radius of a minor arc to be subjected to numerical control milling by utilizing a processing coordinate system during workpiece processing, namely a coordinate value of a processing reference, and calculating the distance corresponding to the center of the auxiliary circle from the origin of the minor arc according to the coordinate value of the origin of the minor arc and the coordinate value of the center of the auxiliary circle, thereby determining the corresponding X value and the corresponding Y value;
(3) according to the determined X value and Y value, inputting codes corresponding to the X value and the Y value in a manual input program control mode in the numerical control machine tool, and moving a machine tool workbench to enable a machine tool spindle to be accurate to a circle center coordinate value corresponding to the circle center position of the auxiliary circle to obtain an auxiliary measuring point; then moving a main shaft of the machine tool, enabling a measuring needle (13) in the lever dial indicator (2) to be in contact with the midpoint of the minor arc to be numerically controlled and milled in the workpiece, recording the number of grids of a dial plate in the lever dial indicator (2) deviating from a zero position, and calculating the actual radius of the minor arc according to the recorded grids;
(4) and comparing the calculated actual radius with the theoretical radius of the minor arc, calculating a corresponding compensation value according to the machining precision of the minor arc, wherein the compensation value is a tool radius compensation value required to be determined during tool compensation, and finally inputting the compensation value in a numerical control machine tool to complete the precise minor arc machining through a tool compensation instruction of the machine tool.
2. The numerical control milling precision minor arc cutter radius compensation value on-line measuring method according to claim 1, characterized in that: the standard block (1) is of a cylindrical structure, the width of a groove in the standard block (1) is smaller than the radius of a minor arc in a workpiece, the lever dial indicator (2) is arranged right above the standard block (1) through a machine tool spindle, and a measuring needle (13) in the lever dial indicator (2) is located at the center of the standard block (1).
3. The numerical control milling precision minor arc cutter radius compensation value on-line measuring method according to claim 1, characterized in that: in the step (3), in the process of moving the spindle of the machine tool, when a measuring needle (13) in the lever dial indicator (2) is in contact with the midpoint of a minor arc to be numerically controlled and milled in a workpiece, if the number of grids of a dial plate in the lever dial indicator (2) at a zero position is a deviation generated by compression, the actual radius of the minor arc is equal to the theoretical radius plus 0.01-multiplication number of grids; if the number of the grids of the dial in the lever dial indicator (2) at the zero position is the deviation generated by stretching, the actual radius of the minor arc is equal to the theoretical radius minus 0.01 multiplied number of the grids.
4. The numerical control milling precision minor arc cutter radius compensation value on-line measuring method according to claim 1, characterized in that: in the step (4), if the actual radius of the minor arc is smaller than the theoretical radius, the compensation value is a difference between a minor arc tolerance band and the theoretical radius, and if the actual radius of the minor arc is larger than the theoretical radius, the compensation value is a difference between the actual radius and the minor arc tolerance band.
5. The device for the online measurement of the radius compensation value of the cutter for the numerical control milling of the precise minor arc according to claim 1 is characterized in that: including standard block (1), lever percentage table (2), swallow tail seat (3) and universal mechanism, standard block (1) is cylindrical structure, and the center of standard block (1) is equipped with a recess along its axial, lever percentage table (2) select for use the graduation value to be 0.01 mm's front surface formula structure be provided with free rotation's measuring needle (13) in lever percentage table (2), measuring needle (13) contact with the recess in standard block (1), swallow tail seat (3) set up in the top of lever percentage table (2), universal mechanism and swallow tail seat (3) fixed connection.
6. The apparatus of claim 1, wherein: universal mechanism is including universal connecting rod (4), regulating block, lower part adjusting screw (6), upper portion adjusting screw (8), go up connecting rod universal head (9) and last connecting rod (10), universal connecting rod (4) have a universal bulb, in the lower extreme of universal connecting rod (4) was fixed in dovetail seat (3), the upper end that has universal bulb was rotated through lower part adjusting screw (6) and regulating block and is connected, the lower extreme of going up connecting rod universal head (9) is passed through upper portion adjusting screw (8) and is rotated with the regulating block and be connected, its upper end and last connecting rod (10) fixed connection.
7. The apparatus of claim 6, wherein: the regulating block is including left grip block (5), fixed screw (7), right grip block (11) and spacing axle (12), spacing axle (12) set up between left grip block (5) and right grip block (11), and the both ends face of spacing axle (12) be equipped with fixed screw (7) assorted screw hole, fixed screw (7) through the screw hole in spacing axle (12) respectively with left grip block (5) and right grip block (11) fixed connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110669597.9A CN113377068A (en) | 2021-06-17 | 2021-06-17 | Online measurement method and device for radius compensation value of cutter for numerical control milling of precise minor arc |
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| CN202110669597.9A CN113377068A (en) | 2021-06-17 | 2021-06-17 | Online measurement method and device for radius compensation value of cutter for numerical control milling of precise minor arc |
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| CN113377068A true CN113377068A (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905331A (en) * | 2022-04-06 | 2022-08-16 | 中国第一汽车股份有限公司 | Device and method for measuring angle |
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2021
- 2021-06-17 CN CN202110669597.9A patent/CN113377068A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114905331A (en) * | 2022-04-06 | 2022-08-16 | 中国第一汽车股份有限公司 | Device and method for measuring angle |
| CN114905331B (en) * | 2022-04-06 | 2024-01-30 | 中国第一汽车股份有限公司 | Device and method for measuring angle |
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Application publication date: 20210910 |