CN113770807B - Sensor fixing device for measuring thermal error of numerical control machine tool - Google Patents
Sensor fixing device for measuring thermal error of numerical control machine tool Download PDFInfo
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- CN113770807B CN113770807B CN202111034495.6A CN202111034495A CN113770807B CN 113770807 B CN113770807 B CN 113770807B CN 202111034495 A CN202111034495 A CN 202111034495A CN 113770807 B CN113770807 B CN 113770807B
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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Abstract
The invention discloses a sensor fixing device for measuring thermal errors of a numerical control machine tool. The universality and the thermal error measurement efficiency of the fixing device can be obviously improved, and the problem that the measurement precision of the eddy current sensor is reduced due to the installation precision is avoided.
Description
Technical Field
The invention belongs to the technical field of error measurement of numerical control machines, and particularly relates to a sensor fixing device for measuring thermal errors of a numerical control machine.
Background
The numerical control machine tool error is an important factor for restricting the precision improvement, the processing and manufacturing error ratio caused by thermal deformation can reach 40-70 percent, and the numerical control machine tool error is an important component of the machine tool error. The numerical control machine tool can form an uneven temperature field in the running process, local thermal deformation is generated, and the position of a cutter and a workpiece is deviated, namely thermal error. The machine tool thermal characteristic test is detection and identification of a machine tool temperature field and deformation, is a basic project for compensating thermal errors of the machine tool, and can be divided into a main shaft thermal characteristic test and a feed shaft thermal characteristic test. The spindle is the main heating source of the machine tool, and the ISO230-3 standard recommends the use of a five-point displacement sensor to measure the thermal error of the spindle.
In the process of measuring the thermal error of the main shaft by the five-point method, the measuring device is developed and designed according to the specific structure of the machine tool, the experimental requirement, the specific shape and size of the displacement sensor and the installation requirement due to the diversity of the structure of the machine tool and the high-precision requirement of the installation position of the sensor, so that the waste of manpower and material resources is caused, and the measuring device is difficult to generalize. In addition, because the position accuracy requirement of displacement sensor head terminal surface to examining the stick reaches the micron order to the position accuracy of sensor head terminal surface to the sensor fixed plate needs to reach the millimeter level, when using traditional fixed hole site mounting means, the sensor later stage of same direction is difficult to finely tune, and is higher to measuring device's processing, assembly process requirement. Therefore, the design of a thermal error measuring device with universality, modularization and high precision has great significance for improving the thermal error measuring efficiency, reducing the experiment cost and improving the sensor installation precision.
Disclosure of Invention
The invention aims to solve the technical problem that aiming at the defects in the prior art, the invention provides the sensor fixing device for measuring the thermal error of the numerical control machine tool, and solves the problems that the existing measuring device is difficult to generalize, and the installation precision is difficult to ensure due to the fact that the installation conditions of various types of displacement sensors are inconsistent.
The invention adopts the following technical scheme:
the utility model provides a digit control machine tool thermal error measures and uses sensor fixing device, includes fastening module, and fastening module sets up on standard connecting rod, and can follow standard connecting rod and remove, and one side of fastening module is connected with the fine setting fixed baseplate of sensor fine setting module, is provided with the support that is used for installing eddy current sensor on the fine setting fixed baseplate.
Specifically, the fastening module comprises a fastening cube, a through groove is formed in the middle of the side face of the fastening cube, the standard connecting rod penetrates through the through groove, a threaded hole is formed in the top face of the fastening cube in the radial direction of the through groove, and a hand-screwed screw is arranged in the threaded hole; the fastening cubic block is connected with the fine-tuning fixing base through a connecting screw rod.
Furthermore, the two ends of the through groove are composed of semicircles with the diameter equal to that of the standard connecting rod.
Furthermore, mounting holes are formed in the periphery of the top face of each fastening cubic block, the mounting holes penetrate through the fastening cubic blocks, the connecting screw rods are arranged in the mounting holes, each mounting hole comprises a positioning face and a threaded hole, and the positioning faces and the threaded holes of the two adjacent mounting holes are arranged in opposite directions.
Specifically, two linear guide rails are arranged in parallel on the top of the fine adjustment fixed base, and a fine adjustment movable base is arranged on each linear guide rail; the left side of the fine adjustment fixed base is provided with a bulge, the fine adjustment screw rod penetrates through the bulge and is in threaded fit with the fine adjustment movable base, and the support is arranged on the fine adjustment movable base.
Furthermore, a spring is sleeved on the fine adjustment screw rod between the support and the fine adjustment movable base.
Specifically, the sensor fixing device further comprises a milling spindle handle, one end of the milling spindle handle integrally fixes the measuring device on a milling spindle of the machine tool, the other end of the milling spindle handle is fixedly connected with a standard connecting rod through a spring jacket, and the standard connecting rod is provided with measuring modules in the X direction, the Y direction and the Z direction according to requirements.
The sensor fixing device comprises a turning tool handle mounting block, one end of the turning tool handle mounting block is fixed on a tool turret of a lathe, the other end of the turning tool handle mounting block is mounted in a fastening cubic block through a hand-screwed screw, the fastening cubic block and another fastening cubic block are assembled through a connecting screw rod, a standard connecting rod is fixedly connected to the other fastening cubic block through the hand-screwed screw, and measuring modules in the X direction, the Y direction and the Z direction are configured on the standard connecting rod according to requirements.
Specifically, sensor fixing device still includes the magnetism gauge stand, and one side of magnetism gauge stand utilizes magnetism to adsorb on the lathe, and the opposite side passes through the screw hole to be connected with standard connection pole, disposes the measuring module in X, Y, the Z side according to the demand on the standard connection pole.
Specifically, sensor fixing device still includes car main shaft chuck installation piece, and the one end of car main shaft chuck installation piece is fixed in the three-jaw chuck of lathe, and the other end links firmly with the standard connection pole, wholly is fixed in the lathe car main shaft with sensor fixing device on, disposes the measuring module in X, Y, the Z side according to the demand on the standard connection pole.
Compared with the prior art, the invention at least has the following beneficial effects:
according to the sensor fixing device for measuring the thermal error of the numerical control machine tool, the fastening module and the sensor fine-tuning module form the measuring module, splicing and replacement can be rapidly carried out according to requirements through modular design, the universality of the device is improved, and maintenance and updating are facilitated.
Furthermore, the fastening cubic block is arranged into a cubic structure, and the planes of the fastening cubic block are used for facilitating quick parallel and vertical positioning when the measuring modules are installed. The top surface of the fastening cubic block is provided with four mounting holes close to four right angles, so that the fastening cubic block can be quickly spliced with other components such as the fine-tuning fixing base and other fastening cubic blocks by using the connecting screw rod.
Furthermore, the two ends of the through groove of the fastening cubic block are formed by semicircles with the diameters equal to the diameters of the standard connecting rods, and hand-screwed screws can tightly support one side of the standard connecting rods in the using process, so that accurate positioning is realized. Meanwhile, compared with a through hole structure which directly adopts the same diameter, the structure of the through groove is easier to install the standard connecting rod.
Furthermore, the mounting hole of the fastening cubic block comprises a positioning surface and a threaded hole, the diameter of the positioning surface is the same as that of the positioning part of the connecting screw rod so as to improve the mounting precision, and the threaded hole can not only enable the two fastening cubic blocks to be connected through the connecting screw rod, but also prevent the connecting screw rod from falling from the mounting hole when the sensor fine adjustment module is not connected.
Furthermore, the fine-tuning movable base is connected with the fine-tuning fixed base through the linear guide rail, so that accurate guiding is realized. The rotary fine-tuning screw rod can change rotary motion into linear motion for fine-tuning the movable base, the screw pitch of the rotary fine-tuning screw rod is set to be small, micron-level fine tuning can be achieved, the problem that the detection range and the installation position of the sensor are difficult to meet requirements simultaneously is avoided, and the measurement precision grade of the sensor is further caused. The support design is for dismantling "L" type, installs eddy current sensor on "L type" support, can change the customization according to the eddy current sensor of different brands to conditions such as support iron plate thickness, installation hole site size.
Furthermore, a spring is sleeved on the fine adjustment screw rod between the fine adjustment fixed base and the fine adjustment movable base, and the elastic force of the spring is utilized to eliminate the thread clearance between the fine adjustment movable base and the fine adjustment screw rod, so that the measurement error caused by the thread clearance in the use process is avoided.
Furthermore, the standard connecting rod can be arranged in a milling spindle cutter handle through a phi 15 spring jacket, so that the sensor fixing device is integrally fixed on a milling spindle of a machine tool, and the requirement for measuring the thermal error of the spindle in a turning and milling composite five-axis machining center is met.
Furthermore, the standard connecting rod and the turning tool handle mounting block are connected in a combined mode through the two fastening cubic blocks, so that the sensor fixing device can be integrally fixed on a lathe turret, and the sensor fixing device is suitable for the requirement of measuring the thermal error of a spindle in a lathe.
Furthermore, the standard connecting rod can be in threaded connection with the magnetic gauge stand, and the magnetic gauge stand can be adsorbed at any position of ferromagnetic materials of the machine tool, so that the sensor fixing device can be integrally fixed on the machine tool, and the requirements of different types of machine tools and two types of spindle thermal error measurement are met.
Furthermore, the standard connecting rod is installed at the chuck of the lathe through the turning spindle chuck installation block, so that the sensor fixing device can be integrally fixed on the turning spindle of the lathe, and the requirement for measuring the thermal error of the milling spindle in the turning and milling composite five-axis machining center is met.
In summary, the invention adopts a modular design, has the characteristics of certain universality and high-precision fine adjustment in thermal error measurement, can adopt installation modes of turning tool handle installation, milling spindle tool handle installation, chuck installation and magnetic gauge stand custom installation, is suitable for thermal error measurement of various spindles of machine tool structures such as a vertical machining center, a horizontal machining center, a turning and milling combined machining center and the like, and can obviously improve the universality and the measurement efficiency of the measuring device.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of the overall structure of a thermal error measurement mount;
FIG. 2 is a schematic view of a fastening module;
FIG. 3 is a schematic diagram of a sensor trimming module;
fig. 4 is a schematic view of the auxiliary mounting fitting.
Wherein: 1. a magnetic watch base; 2. a standard connecting rod; z to the thermal elongation measurement module; 4. a first X thermal error measurement module; 5. a first Y-direction thermal error measuring module; 6. a second X thermal error measurement module; 7. a second Y-direction thermal error measurement module; 8. detecting a rod; 9. connecting a screw rod; 10. screwing the screw by hand; 11. fastening the cubic block; 12. fine adjustment of the screw rod; 13. an eddy current sensor; 14. a support; 15. fine-tuning the movable base; 16. finely adjusting the fixed base; 17. a spring; 18. milling a main shaft cutter handle; 19. a spring jacket; 20. turning a cutter handle mounting block; 21. and a vehicle spindle chuck mounting block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of the various regions, layers and their relative sizes, positional relationships are shown in the drawings as examples only, and in practice deviations due to manufacturing tolerances or technical limitations are possible, and a person skilled in the art may additionally design regions/layers with different shapes, sizes, relative positions, according to the actual needs.
The invention provides a sensor fixing device for measuring thermal errors of a numerical control machine tool, which comprises a fastening module, a sensor fine-tuning module and auxiliary installation accessories. The fastening module is arranged on the standard connecting rod 2, the sensor fine-tuning module is arranged on the front side of the fastening module, the fastening module and the sensor fine-tuning module jointly form a measuring module, and the measuring module can be installed on the standard connecting rod 2 in an expanding mode according to measuring requirements. And selecting corresponding auxiliary mounting accessories to be combined with the standard connecting rod 2 according to the measurement requirements and the type of the machine tool, so that the sensor fixing device is integrally fixed on the machine tool.
The fastening module comprises a connecting screw 9, a thumb screw 10 and a fastening cube 11.
Referring to fig. 2, a through groove is formed in the middle of the side face of the fastening cube 11, and two ends of the through groove are formed by semicircles with the diameter equal to that of the standard connecting rod (2).
In the middle of the top side of the fastening cube 11, in the radial direction of the through-slot, there is a threaded hole running through, and the fastening cube 11 is fastened to the standard connecting rod 2 by tightening the hand screw 10.
Four mounting holes are formed in the top surface of the fastening cubic block 11 close to the four right angles, one section of the structure of each mounting hole is a positioning surface, the other section of the structure of each mounting hole is a threaded hole, the whole mounting hole penetrates through the fastening cubic block 11, and the positioning surfaces of the adjacent mounting holes are opposite to the threaded holes in position sequence. Two connecting screw rods 9 respectively penetrate through two mounting holes at diagonal positions of the fastening cubic blocks 11, threads with the same type as the threaded holes are arranged at the top ends of the connecting screw rods 9, and the middle parts of the connecting screw rods 9 are in clearance fit with the positioning surfaces of the mounting holes, so that certain assembling precision is improved.
The sensor fine-tuning module comprises an eddy current sensor 13, an L-shaped bracket 14 for a detachable sensor, a fine-tuning movable base 15, a fine-tuning fixed base 16 and a spring 17.
Referring to fig. 3, the fine-tuning fixing base 16 is arranged at the lower part, four threaded holes are formed at the right angle of the bottom of the fine-tuning fixing base 16, the fine-tuning fixing base is fixed by being in threaded connection with the connecting screw 9 of the fastening module, two linear guide rails are arranged in parallel on the top of the fine-tuning fixing base 16 close to the two side faces, and fine-tuning movable bases 15 are mounted on the linear guide rails; a bulge is arranged on the left side of the fine adjustment fixed base 16, and the fine adjustment screw 12 penetrates through the bulge and is in threaded fit with the fine adjustment movable base 15.
The top of the fine adjustment movable base 15 is fixedly connected with a support 14 through a screw, the support 14 is integrally L-shaped in appearance, a groove with the width larger than the diameter of the eddy current sensor 13 is formed in the side face of the support 14, the eddy current sensor 13 penetrates through the groove and is fixed on the support 14 through nuts on two sides, and the eddy current sensor can move up and down in the groove to adjust the angle.
The fine tuning screw 12 between the support and the fine tuning movable base 15 is sleeved with a spring 17, and the single-side positioning of the fine tuning screw 12 and the fine tuning movable base 15 is realized by the elasticity of the spring, so that the thread clearance is eliminated.
The auxiliary installation accessories comprise a magnetic gauge stand 1, a milling spindle tool shank 18, a turning tool shank installation block 20 and a spindle chuck installation block 21, wherein the four accessories can be combined with the current part to adapt to different machine tool thermal error measurement.
Referring to fig. 4, a milling spindle tool shank 18 is fixedly connected with a standard connecting rod 2 through a spring jacket 19 with a diameter of 15mm, and a measuring module such as a first X thermal error measuring module 5 can be installed on the standard connecting rod 2 for expansion according to measurement requirements, so that the sensor fixing device is integrally fixed on a milling spindle of a five-axis turning and milling composite machining center for measuring a thermal error of the spindle.
The turning shank mounting block 19 is a custom shank with a 20 x 20mm square cross-section, cylindrical at the front end, which can pass through the hole in the middle of the fastening cube 11 and be fastened by a hand screw 10. Fastening cubic piece 11 can be assembled through connecting screw 9 with another fastening cubic piece 11, has linked firmly a standard connecting rod 2 through hand screw 10 on another fastening cubic piece 11, can expand like the measuring module of first X hot error measuring module 5 according to measuring the demand installation on the standard connecting rod 2 to carry out hot error's measurement to the car owner axle on being fixed in the lathe turret with this sensor fixing device whole.
The magnetic gauge stand 1 is connected with one end of the standard connecting rod 2 through a threaded hole M8, and the standard connecting rod 2 can be provided with a measuring module such as a first X thermal error measuring module 5 according to the measuring requirement for expansion. The sensor fixing device can be integrally fixed at the position which can be adsorbed by any magnetic meter base 1 through the magnetic meter base 1 to measure the thermal error of the main shaft.
The vehicle spindle chuck mounting block 21 is a cylinder with the diameter of phi 40mm, the center of the end face of the cylinder is provided with an M8 threaded hole, and one end of the standard connecting rod 2 is connected with the vehicle spindle chuck mounting block 21 through the threaded hole. The standard connecting rod 2 can be provided with a measuring module such as a first X thermal error measuring module 5 for extension according to the measuring requirement. The cylindrical turning spindle chuck mounting block 21 can be clamped by a three-grabbing chuck of a machine tool, so that the sensor fixing device is integrally fixed on a turning spindle of a five-axis turning and milling combined machining center to measure the thermal error of the milling spindle. In addition, the vertical extension of the standard connecting rod 2 can be realized through the matching of the two fastening cubes 11, and the standard connecting rod 2 is turned to be suitable for more application scenes.
Referring to fig. 1, for convenience of explaining a using manner of the measuring device of the present invention, for example, a five-point method is used to measure a thermal error of a spindle of a vertical three-axis machine tool, a model of a tool holder installed on the spindle is HSK, and a detection rod 8 is HSK and can be installed on a milling spindle of the vertical three-axis machine tool.
The magnetic gauge stand 1 is vertically adsorbed on a machine tool workbench, one end of a 200mm standard connecting rod 2 with a 0-200 mm graduated scale is connected with the magnetic gauge stand 1 through a threaded hole of M8, the other end of the standard connecting rod is provided with a threaded hole of M8 along the axis direction, and the length of the standard connecting rods 2 can be spliced according to actual measurement conditions.
The Z-direction thermal elongation measuring module 3, the first X-direction thermal error measuring module 4, the first Y-direction thermal error measuring module 5, the second X-direction thermal error measuring module 6 and the second Y-direction thermal error measuring module 7 are sequentially arranged on the standard connecting rod 2, the HSK-type detection rod 8 is arranged in parallel with the standard connecting rod 2, according to the requirement of a five-point test method, the Z-direction thermal elongation measuring module 3 is arranged at the tip part of the HSK-type detection rod 8 to realize the measurement of the main shaft thermal elongation in the Z direction, and the first X-direction thermal error measuring module 4 and the second X-direction thermal error measuring module 6 are arranged in the X direction of the machine tool to realize the measurement of the thermal deformation and the thermal inclination in the X direction; similarly, the first Y-direction thermal error measuring module 5 and the second Y-direction thermal error measuring module 7 are arranged in the Y-direction of the machine tool.
The working principle of the sensor fixing device for measuring the thermal error of the numerical control machine tool is as follows:
in the actual measurement process, firstly, measurement equipment is prepared, and the combination of auxiliary installation accessories and standard rods is selected according to different machine tool types and measurement requirements. In addition, the thickness requirement and the slotting width of different sensors for the L-shaped bracket are different, and customization is needed.
Mounting a measuring module;
because the measurement accuracy of the sensor is greatly influenced by the distance between the end face of the sensor and the plane of the bracket and is related to the material of the bracket, the eddy current sensor 13 is arranged on the bracket 14 according to the required structural dimension and installation dimension; since the fastening cubes 11 are cubes, with two adjacent faces perpendicular to each other, the faces can be used to achieve a perpendicular and parallel positioning of the different fastening cubes 11. 4 fastening cubic blocks 11 are selected to penetrate into the standard connecting rod 2, the standard connecting rod is placed on a relatively flat desktop to ensure that two groups of fastening cubic blocks 11 in the X and Y measuring directions are vertical and two fastening cubic blocks 11 in the same measuring direction are parallel, and after a reasonable length is selected according to the size of the standard connecting rod 2, a hand screw 10 is screwed to complete fastening; finally, the sensor fine-tuning module structure shown in fig. 3 is in threaded connection with the fine-tuning fixing base 16 through the hand-screwed screw 10, and then the installation of the measuring module can be completed.
And (4) auxiliary mounting accessory selection.
The corresponding auxiliary installation accessories are selected according to the structure of the measuring machine tool and the position of the measuring spindle and comprise four accessories, namely a magnetic gauge stand 1, a milling spindle tool handle 18, a turning tool handle installation block 20 and a main spindle chuck installation block 21, the auxiliary installation accessories can be connected with a standard connecting rod 2 to form four installation modes, and the sensor fixing device is fixed on the machine tool.
And (5) fine adjustment of the sensor.
The fine adjustment screw 12 is rotated to realize the change of the rotary motion into the linear motion, the position between the head end face of the eddy current sensor 13 and the check rod 8 is adjusted to meet the adjustment requirement of the micron level, and the middle position of the measurement range of the eddy current sensor 13 is generally selected for the adjusted target point so as to uniformly divide the positive and negative measurement ranges.
And (4) measuring thermal error.
The eddy current sensors 13 are connected with a power supply and a signal acquisition device, and the distance between the detection rod 8 and the end face of each eddy current sensor 13 can be accurately measured through the law of electromagnetic induction. Referring to the sensor measurement point location arrangement shown in fig. 1, a five-point method is used to measure the thermal error of the spindle, wherein the thermal elongation of the spindle in the Z direction is measured by a Z-direction thermal elongation measurement module 3, the radial direction is divided into the X direction and the Y direction, the X direction is measured by two measurement modules, i.e. a first X-direction thermal error measurement module 4 and a second X-direction thermal error measurement module 6, and the thermal inclination angle θ of the spindle in the XOZ plane can be calculated by using the measurement values of the two sensors x Size and X-direction heat deviation; similarly, the YOZ plane calculates the thermal inclination angle theta by using the values obtained by the first Y-shaped thermal error measuring module 5 and the second Y-shaped thermal error measuring module 7 y And Y to the thermal offset value.
In summary, the sensor fixing device for measuring the thermal error of the numerical control machine tool disclosed by the invention adopts a modular design, the measuring module and the auxiliary mounting accessories can be configured according to actual conditions so as to meet the requirements of different types of numerical control machine tools (lathes, three-axis vertical milling machines, five-axis machining centers, five-axis turning and milling combined machining centers and the like), different types of main shafts (turning main shafts and milling main shafts) and different testing methods (a thermal error five-point testing method, a three-point testing method and the like), the universality and the thermal error measuring efficiency of the fixing device can be obviously improved, and the problem of reduction of the measuring precision of the eddy current sensor caused by the mounting precision can be avoided.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. The sensor fixing device for measuring the thermal error of the numerical control machine tool is characterized by comprising a fastening module, wherein the fastening module is arranged on a standard connecting rod (2) and can move along the standard connecting rod (2), one side of the fastening module is connected with a fine adjustment fixing base (16) of a sensor fine adjustment module, and a support (14) for mounting an eddy current sensor (13) is arranged on the fine adjustment fixing base (16);
the fastening module comprises a fastening cubic block (11), a through groove is formed in the middle of the side face of the fastening cubic block (11), the standard connecting rod (2) penetrates through the through groove, a threaded hole is formed in the top face of the fastening cubic block (11) in the radial direction of the through groove, and a hand-screwed screw (10) is arranged in the threaded hole; the fastening cubic block (11) is connected with the fine tuning fixing base (16) for fine tuning through a connecting screw rod (9);
two linear guide rails are arranged in parallel at the top of the fixed base (16), and a fine adjustment movable base (15) is arranged on the linear guide rails; a bulge is arranged on the left side of the fine adjustment fixed base (16), a fine adjustment screw rod (12) penetrates through the bulge and is in threaded fit with the fine adjustment movable base (15), and a support (14) is arranged on the fine adjustment movable base (15);
sensor fixing device still includes turning handle of a knife installation piece (20), the one end of turning handle of a knife installation piece (20) is fixed in on the tool turret of lathe, the other end passes through hand screw (10) and installs in fastening cubic (11), assemble through connecting screw (9) between fastening cubic (11) and another fastening cubic (11), it has standard connecting rod (2) to link firmly through hand screw (10) on another fastening cubic (11), dispose X according to the demand on standard connecting rod (2), Y, the ascending measuring module in Z direction.
2. The sensor fixing device for measuring the thermal error of the numerical control machine tool according to claim 1, characterized in that both ends of the through groove are composed of semicircles with a diameter equal to that of the standard connecting rod (2).
3. The sensor fixing device for measuring the thermal error of the numerical control machine tool as claimed in claim 1, wherein mounting holes are formed in the periphery of the top surface of the fastening cubic block (11), the mounting holes penetrate through the fastening cubic block (11), the connecting screw rod (9) is arranged in the mounting holes, the mounting holes comprise two parts, namely a positioning surface and a threaded hole, and the positioning surfaces and the threaded holes of two adjacent mounting holes are arranged in opposite directions.
4. The sensor fixing device for measuring the thermal error of the numerical control machine tool according to claim 1, wherein a spring (17) is sleeved on the fine adjustment screw rod (12) between the support and the fine adjustment movable base (15).
5. The sensor fixing device for measuring the thermal error of the numerical control machine tool as claimed in claim 1, wherein the sensor fixing device further comprises a milling spindle handle (18), one end of the milling spindle handle (18) integrally fixes the measuring device on a milling spindle of the machine tool, the other end of the milling spindle handle is fixedly connected with a standard connecting rod (2) through a spring jacket (19), and measuring modules in the X, Y and Z directions are configured on the standard connecting rod (2) according to requirements.
6. The sensor fixing device for measuring the thermal error of the numerical control machine tool according to claim 1, characterized in that the sensor fixing device further comprises a magnetic gauge stand (1), one side of the magnetic gauge stand (1) is adsorbed on the machine tool by utilizing magnetism, the other side of the magnetic gauge stand is connected with a standard connecting rod (2) through a threaded hole, and measuring modules in the X, Y and Z directions are arranged on the standard connecting rod (2) according to requirements.
7. The sensor fixing device for measuring the thermal error of the numerical control machine tool according to claim 1, characterized in that the sensor fixing device further comprises a lathe spindle chuck mounting block (21), one end of the lathe spindle chuck mounting block (21) is fixed to a three-jaw chuck of the lathe, the other end of the lathe spindle chuck mounting block is fixedly connected with a standard connecting rod (2), the sensor fixing device is integrally fixed to a lathe spindle of the lathe, and measuring modules in X, Y and Z directions are arranged on the standard connecting rod (2) according to requirements.
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