CN108151989B - Rigidity detection device for numerical control horizontal servo tool rest and use method - Google Patents
Rigidity detection device for numerical control horizontal servo tool rest and use method Download PDFInfo
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- CN108151989B CN108151989B CN201810234691.XA CN201810234691A CN108151989B CN 108151989 B CN108151989 B CN 108151989B CN 201810234691 A CN201810234691 A CN 201810234691A CN 108151989 B CN108151989 B CN 108151989B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention belongs to the field of precision testing of functional parts of machine tools, and relates to a rigidity detection device of a numerical control horizontal servo tool rest and a use method thereof, wherein the rigidity detection device comprises a tool rest test stand, a detection stand, a tool rest rigidity detection stand, a tool rest deformation detection stand and a horizontal iron; the tool rest test bed is fixed on the ground level iron, the tool rest rigidity detection frame is arranged on the detection table, the detection table is arranged on two right-angle sides of the tool rest test bed, and the tool rest deformation detection frame is adsorbed on the tool rest test bed; the using method comprises the following steps: the tool rest rigidity detection device comprises a tool rest to be detected, a detection table, a special detection tool, a tool rest rigidity detection frame and a tool rest deformation detection frame, wherein the tool rest rigidity detection frame and the tool rest deformation detection frame are arranged on a tool rest of a working position. The invention can detect the rigidity of different types of numerical control horizontal servo tool rest in axial, tangential and radial directions, can quantify the magnitude of loading force, has high resolution of applied load, can not generate loading overload condition, leads the tool rest to deform within the elastic deformation range, protects the tool rest, has small integral volume and is convenient to move.
Description
Technical Field
The invention belongs to the field of precision testing of functional parts of machine tools, relates to a precision detection device of a numerical control servo tool rest, and particularly relates to a detection device capable of comprehensively detecting rigidity of different types of numerical control servo tool rests and a use method of the detection device.
Background
The numerical control servo tool rest is one of core functional components of the numerical control machine tool, and the precision of the numerical control servo tool rest influences the machining precision. Before factory delivery, factories can detect the cutter frame precision according to the factory standard and the national standard. National standard GB/T20960-2007 specifies a series of geometric accuracy test items, including tool post stiffness test items. The rigidity of the tool rest is used as a main reference index of the performance of the tool rest, and domestic mainstream manufacturers are provided with tool rest rigidity detection devices with uneven functions.
For the tool rest rigidity detection method, the maximum displacement deformation of the tool rest under axial static load and tangential static load and corresponding loads is specified in national standard GB/T20960-2007, but the maximum displacement deformation of the tool rest under radial force load and corresponding loads is not given when the actual machining of the tool rest is ignored. The specific detection device and the use method of the device for the tool rest rigidity detection project are not specified in national standard GB/T20960-2007, and the specific detection device and the use method of the device are still far from actual detection application popularization.
The prior art patent or document also only mentions axial and tangential static load applying means and does not relate to radial static load applying means. In addition, the existing axial and tangential static load applying device has the defects of large structure, poor flexibility, difficult installation, low operability and the like.
Based on the angle of the tool rest users and the reliability test of the tool rest, the invention provides a detection device capable of rapidly detecting the rigidity of different types of numerical control horizontal servo tool rests in the axial direction, the tangential direction and the radial direction, and provides a more detailed use method of the detection device for guiding the rigidity detection of an actual tool rest.
Disclosure of Invention
The technical problem to be solved by the invention is that the existing numerical control horizontal servo tool rest rigidity detection device is large in structure, poor in flexibility, not suitable for installation, low in operability, not comprehensive in function, and not capable of carrying out comprehensive rigidity detection on the tool rest.
The invention provides the detection device capable of detecting the rigidity of different types of numerical control horizontal servo tool rests in the axial direction, the tangential direction and the radial direction, and simultaneously, the device is digitalized with loading force, so that the device is convenient to move, and a user is helped to develop a tool rest rigidity detection test quickly and conveniently.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme, and the technical scheme is as follows in combination with the accompanying drawings:
a digital control horizontal servo tool rest rigidity detection device consists of a tool rest test bed, a detection bed, a tool rest rigidity detection frame, a tool rest deformation detection frame and a horizontal iron 34;
the tool rest test bed is fixed on the ground flat iron 34, the tool rest rigidity detection frame is arranged on the detection bed, the detection bed is arranged on two right-angle sides of the tool rest test bed and is fixed on the ground flat iron 34, and the tool rest deformation detection frame is adsorbed on the tool rest test bed and is positioned on a load applying direction line of the tool rest rigidity detection frame.
The tool rest test bed comprises a tool rest 40 to be tested, a tool rest backing plate 41, a tool rest support table 42, a tool rest 43, a tool pan 44 and a special gauge 16; the cutter head 44 of the measured cutter frame 40 is provided with a cutter seat 43 at each station, the special gauge 16 is arranged on the cutter seat 43 at the working position according to the actual cutter clamping mode, the measured cutter frame 40 is fixed on a cutter frame backing plate 41, the cutter frame backing plate 41 is fixed on a cutter frame supporting table 42, and the cutter frame supporting table 42 is fixed on the ground flat iron 34.
The detection platform comprises a detection platform I1, a detection platform base plate I19, a detection platform base I18, a detection platform II 11, a detection platform base plate II 12 and a detection platform base II 13;
the detection platform I1 and the detection platform II 11 are provided with T-shaped grooves; the detection platform I1 is connected with the detection platform base plate I19 through bolts, the detection platform base plate I19 is connected with the detection platform base I18 through bolts, the detection platform base I18 is fixed on the ground iron 34 and is arranged right in front of the detected tool rest 40;
the detection platform II 11 is connected with the detection platform base plate II 12 through bolts, the detection platform base plate II 12 is connected with the detection platform base II 13 through bolts, the detection platform base II 13 is fixed on the ground flat iron 34 and is arranged on the side face of the tool apron 43 of the working position of the tool rest 40 to be detected.
The tool rest rigidity detection frame part comprises a rotating handle 15, a clamping seat 2, a conical table 30, a loading block 7, a pressure sensor 6, a loading head 20, a clamping ring 21, a spring 22, a guide post 26, a rotating handle bearing 27, a rigid support I10, a rigid support II 17 and a bolt 14;
the rigid support I10 is fixed on the detection platform II 11, and the rigid support II 17 is fixed on the detection platform I;
the rigid support I10 is provided with a bolt through groove 23, a loading square groove 25 and a spring buckling groove 38; a guide post 26 is vertically welded in the middle of the rigid support I10, and a rotating handle bearing 27 is embedded at the contact side of the guide post 26 and the rigid support I10; the clamping seat 2 is provided with a bolt square hole 28, a U-shaped groove 31 and a spring through hole 45;
the bolt 14 is inserted into the bolt through groove 23 through the bolt square hole 28 to connect the clamping seat 2 and the rigid support I10; the four loading blocks 7 are respectively inserted into the loading square grooves 25, the loading blocks 7 in the up-down direction are directly connected with the spring buckling grooves 38 on the rigid support I10 through springs 22, and the loading blocks in the left-right direction are connected with the spring buckling grooves 38 on the rigid support I10 through springs 22 penetrating through spring through holes 45; the loading head 20 is connected with the pressure sensor 6 through threads, and the pressure sensor 6 is connected with the loading block 7 through a connecting shaft 37; the upper part of the rotating handle 15 is clamped into the U-shaped groove 31 through the rotating handle clamping table 32, the middle part of the rotating handle 15 passes through the conical table 30 and the guide post 26 through the threaded shaft 35, and the lower part of the rotating handle 15 is matched with the rotating handle bearing 27;
the right end of the conical table 30 is matched with a threaded shaft 35 on the rotary handle 15 through threads, the through hole at the left end of the conical table 30 is in clearance fit with the guide post 26, and four wedge faces of the conical table 30 are respectively contacted with the wedge faces of the four loading blocks 7 at corresponding positions.
When the rotating handle 15 rotates clockwise, the conical table 30 moves linearly inwards, and the loading block 7 is extruded by the wedge surface to move outwards, so that the force direction is transferred; when the rotating handle 15 rotates anticlockwise, the conical table 30 moves outwards linearly, the spring 22 contracts, and the loading block 7 moves towards the center, so that the force is unloaded. Meanwhile, the wedge-shaped surface contact structure of the conical table 30 and the loading block 7 can play a role in amplifying force, so that the input force is reduced, and the labor is saved.
In the technical scheme, the rigid support I10 and the rigid support II 17 are identical in structure.
The tool rest deformation detection frame comprises a tangential dial indicator, an axial dial indicator 8, a radial dial indicator 4, an axial dial indicator bracket 9 and a radial dial indicator bracket 3; the axial dial indicator 8 is fixed on the axial dial indicator bracket 9 according to a magnetic seat clamping mode, and the radial dial indicator 4 is fixed on the radial dial indicator bracket 3 according to a magnetic seat clamping mode; the vertical cutterhead of the axial dial indicator 8 and the axial loading force are positioned on the same horizontal line, the vertical cutterhead of the radial dial indicator 4 and the radial loading force are positioned on the same horizontal line, and the vertical working position tool apron 43 of the tangential dial indicator and the tangential loading force are positioned on the same horizontal line.
The application method of the rigidity detection device of the numerical control horizontal servo knife rest comprises the following steps:
step one: mounting the measured tool rest 40 on a tool rest base plate 41;
step two: according to the center height of the detected tool rest 40, the heights of the detection platform base plate I19 and the detection platform base plate II 12 are adjusted, and a detection table is installed;
step three: and (5) detecting the rigidity of the tool rest.
And step three, detecting the rigidity of the tool rest, which specifically comprises the following steps:
3.1 mounting a special gauge 16 on the working position tool apron 43;
3.2, a tool rest rigidity detection frame is arranged, and comprises a rigidity support I10, a loading block 7, a pressure sensor 6, a loading head 20, a bolt 14 and a spring 22;
3.3, adjusting the positions of the detection platform base plate I19, the detection platform base plate II 12, the rigid support I10 and the rigid support II 17, so as to align the working position of the loading block 7, enable the loading head 20 to be in the stressing direction, and enable the loading head 20 to realize tangential, axial or radial loading;
3.4, adjusting the positions of the tangential dial indicator, the axial dial indicator and the radial dial indicator according to the force application direction, so that the dial indicator is arranged on the same horizontal line in the opposite direction of force application;
3.5, starting the test, rotating the rotating handle 15, observing the static load application reading of the pressure sensor 6 and the displacement deformation reading of the dial indicator cutterhead at the corresponding position, and paying attention to slowly rotating the rotating handle 15 so as to avoid damaging the tested tool rest 40 due to overload;
3.6 recording data and analyzing the relation between the tool holder reliability and the tool holder rigidity precision retention.
Compared with the prior art, the invention has the beneficial effects that:
1. the rigidity detection device of the numerical control horizontal servo tool rest can detect rigidity of different types of numerical control horizontal servo tool rests in axial, tangential and radial directions.
2. The rigidity detection device of the numerical control horizontal servo tool rest can quantify the loading force, has high loading resolution, can not generate loading overload condition, enables the tool rest to deform within the elastic deformation range, and can protect the tool rest.
3. The rigidity detection device for the numerical control horizontal servo knife rest has the advantages of small whole size, convenience in moving and convenience in quick operation of a user.
4. The invention relates to a rigidity detection device for a numerical control horizontal servo tool rest, which is not limited by the type, the number of tool bits, the center height and the installation size of a tool rest to be detected, and belongs to a detection device for universal rigidity detection.
5. The numerical control horizontal servo tool rest rigidity detection device provided by the invention provides a use method of the detection device, standardizes the use flow of the detection device, solves the defect that the use method in the prior art is not clear, and enables the tool rest rigidity detection application to be practical.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is an overall axial view of a rigidity detection device of a numerical control horizontal servo knife rest;
FIG. 2 is an exploded view of a part of a tangential and radial loading device of the rigidity detection device of the numerical control horizontal servo knife rest;
FIG. 3 is a front view of the tangential and radial loading device of the rigidity detection device of the numerical control horizontal servo knife rest;
FIG. 4 is an assembly axial view of a rigid support I and a guide post 26 of the rigidity detection device of the numerical control horizontal servo knife rest, and a rotating handle 27;
FIG. 5 is a view of the stem of the stiffness detection device for the numerical control servo horizontal clothes knife rest of the invention;
FIG. 6 is a cross pin axial view of the rigidity detection device of the numerical control servo horizontal clothes rack of the invention;
FIG. 7 (a) is a front cross-sectional view of a radial loading device of the rigidity detection device of the numerical control horizontal servo knife rest of the invention;
FIG. 7 (b) is a right side view of the radial loading device of the rigidity detection device of the numerical control horizontal servo knife rest of the invention;
FIG. 7 (c) is a top cross-sectional view of a radial loading device of the stiffness detection device of the numerical control horizontal servo knife rest of the invention;
FIG. 8 is a flow chart of a method for using the rigidity detection device of the numerical control horizontal servo knife rest;
the tool comprises a 1-detection platform I, a 2-clamping seat, a 3-radial dial indicator bracket, a 4-radial dial indicator, a 5-cutter head, a 6-pressure sensor, a 7-loading block, an 8-axial dial indicator, a 9-axial dial indicator bracket, a 10-rigid support I, a 11-detection platform II, a 12-detection platform base II, a 13-detection platform base II, a 14-bolt, a 15-rotating handle, a 16-special gauge, a 17-rigid support II, a 18-detection platform base I, a 19-detection platform base I, a 20-loading head, a 21-clamping ring, a 22-spring, a 23-bolt through groove, a 24-conical groove, a 25-loading square groove, a 26-guide pillar, a 27-rotating handle bearing, a 28-bolt square hole, a 29-loading block square hole, a 30-conical table, a 31-U-shaped groove, a 32-rotating handle clamping table, a 33-handle, a 34-ground flat iron, a 35-threaded shaft, a 36-optical axis, a 37-connecting shaft, a 38-spring groove, a 39-base plate, a 40-tested tool rest, a 41-tool rest, a 42-supporting tool rest, a 43-44, and a through hole.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
1. geometric accuracy detection device for numerical control horizontal servo tool rest
Referring to fig. 1, the numerical control horizontal servo tool rest rigidity detection device of the invention comprises a tool rest test stand, a detection stand, a tool rest rigidity detection stand, a tool rest deformation detection stand and a horizontal iron 34. The tool rest test bed is fixed on the ground flat iron 34, the tool rest rigidity detection frame is arranged on the detection bed, the detection bed is arranged on two right-angle sides of the tool rest test bed, the tool rest deformation detection frame is fixed on the ground flat iron 34, and the tool rest deformation detection frame is adsorbed on the tool rest test bed and is positioned on a load applying direction line of the tool rest rigidity detection frame.
1. Knife rest test stand
Referring to fig. 1, the tool rest test stand includes a measured tool rest 40, a tool rest pad 41, a tool rest support 42, a tool rest 43, a tool pan 44 and a dedicated test tool 16.
The cutter head 44 of the measured cutter frame 40 is provided with a cutter seat 43 at each station, the special gauge 16 is arranged on the cutter seat 43 at the working position according to the actual cutter clamping mode, the measured cutter frame 40 is fixed on the cutter frame backing plate 41 through bolts, the cutter frame backing plate 41 is fixed on the cutter frame supporting table 42 through bolts, and the cutter frame supporting table 42 is fixed on the ground flat iron 34 through bolts.
2. Detection table
Referring to fig. 1, the detection platform comprises a detection platform i 1, a detection platform base plate i 19, a detection platform base plate i 18, a detection platform ii 11, a detection platform base plate ii 12 and a detection platform base plate ii 13.
T-shaped grooves are formed in the detection platform I1 and the detection platform II 11, and counter sunk holes are formed in the periphery of the detection platform I and the detection platform II; through holes are formed in the corresponding positions around the detection platform base plate I19 and the detection platform base plate II 12; screw blind holes are formed in the corresponding positions around the detection platform base I18 and the detection platform base II 13; the detection platform I1, the detection platform base plate I19 and the detection platform base I18 are connected through bolts, and are integrally arranged right in front of the detected tool rest 40; the detection platform II 11, the detection platform base plate II 12 and the detection platform base II 13 are connected through bolts, and are integrally arranged on the side face of the tool apron 43 of the working position of the tool rest 40 to be detected.
The invention does not limit the model, the number of tool bits, the center height and the installation size of the measured tool rest 40, the installation sizes of different tool rests are adjusted according to the tool rest base plate 41, and the matching of different center height tool rests and the geometric accuracy detection device is adjusted by changing the heights of the detection platform base plate I19 and the detection platform base plate II 12.
3. Tool rest rigidity detection frame
Referring to fig. 2, 3, 4, 5, 6 and 7, the tool rest rigidity detection frame part comprises a rotating handle 15, a clamping seat 2, a conical table 30, a loading block 7, a connecting shaft 37, a pressure sensor 6, a loading head 20, a clamping ring 21, a spring 22, a guide post 26, a rotating handle bearing 27, a rigid support I10, a rigid support II 17 and a bolt 14.
The rigid support I10 is fixed on the detection platform II 11 through bolts, the rigid support II 17 is fixed on the detection platform I through bolts, the rigid support I10 and the rigid support II 17 are different in types only, and are suitable for loading of knife rests in different directions, but the structural principle is consistent, and the rigid support I10 is taken as an example for description;
referring to fig. 2, 4 and 7 (a), the rigid support i 10 is shaped like a letter "convex" as a whole, a bottom plate 39 is provided at the lower end, and through holes are provided around the bottom plate 39 for connection with the detection platform ii 11; the middle part of the rigid support I10 is provided with an upper latch through groove 23 and a lower latch through groove which are used for fixing the clamping seat 2; the periphery of the front end of the rigid support I10 is provided with a loading square groove 25 which is used for being matched with the loading block 7; spring buckling grooves 38 are formed on two sides of the loading square groove 25, and one end of the spring 22 is fixed; the front end center of the rigid support I10 is provided with a conical groove 24, so that the loading square groove 25 is in a right-angle trapezoidal groove structure; the bottom of the conical groove 24 is welded with a cylindrical guide post 26, and the guide post 26 is embedded with a rotating handle bearing 27 which is matched with the conical table 30.
Referring to fig. 2, the card seat 2 is U-shaped, a U-shaped groove 31 is formed in the middle of the right side, bolt square holes 28 are formed in the positions corresponding to the upper and lower sides of the card seat, loading block square holes 29 are formed in the middle of the two sides, and spring through holes 45 are formed in the upper and lower ends of the loading block square holes 29;
referring to fig. 5, a set of handles 33 is provided at the right end of the stem 15, a stem clamping table 32 is provided on the left side of the handles 33, a threaded shaft 35 is provided on the left side of the stem clamping table 32, and an optical axis 36 is provided on the left side of the stem 15.
Referring to fig. 7, a threaded hole is formed in the left front section of the center of the conical table 30 and is in threaded engagement with the threaded shaft 35; the right rear end is a through hole which is in clearance fit with the guide post 26.
The right end of the loading block 7 is in a conical table shape, the leftmost end of the loading block 7 is an inclined plane, and the inclination is consistent with the conical surface of the conical table 30; two symmetrically placed clamping rings 21 are welded on the side surface of the middle part of the loading block 7. The loading head 20 is connected to the pressure sensor 6 by a screw thread, and the pressure sensor 6 is connected to the loading block 7 by a connecting shaft 37.
Referring to fig. 2, 3, 6 and 7, the upper part of the stem 15 is clamped into the U-shaped groove 31 by the stem clamping table 32, the threaded shaft 35 is meshed with the threaded section of the conical table 30, and the optical axis 36 passes through the through hole of the rear half section of the conical table 30, enters the guide post 26 and is matched with the stem bearing 27. The guide post 26 penetrates into the taper table 30, and constrains the degree of freedom of the taper table 30. The loading block 7 in the tangential direction is directly inserted into the loading square groove 25, and the loading block 7 in the radial direction is inserted into the loading square groove 25 through the loading block square hole 29. The two ends of the spring 22 are respectively fixed on the snap ring 21 and the spring fastening groove 38, and in the initial unstretched state, the four loading blocks 7 are closed toward the center. Four wedge faces of the conical table 30 are in lateral contact with the loading block 7. The bolt 14 passes through the bolt square hole 28 and is inserted into the bolt through groove 23 to connect the clamping seat 2 and the rigid support I10;
when the rotating handle 15 rotates clockwise, the conical table 30 moves linearly inwards, and the loading block 7 is extruded by the wedge surface to move outwards, so that the force direction is transferred; when the rotating handle 15 rotates anticlockwise, the conical table 30 moves outwards linearly, the spring 22 contracts, and the loading block 7 moves towards the center, so that the force is unloaded. Meanwhile, the wedge-shaped surface contact structure of the conical table 30 and the loading block 7 can play a role in amplifying force, so that the input force is reduced, and the labor is saved.
When the mounting of the rigid detection frame of the tool rest has extreme conditions, such as that force can only be applied from a specific angle or the placing position of the rigid detection frame of the tool rest is limited by space, the right end of the loading block 7 is in a conical table shape, the outline of the loading block is consistent with that of the conical table 30, the loading block can be inserted into the rigid support I10 to realize the connection with a plurality of sets of rigid supports I10, namely, the loading block 7 can be used for directly loading force or can be equivalent to one conical table 30, the force is generated, the loading block 7 is matched with the plurality of sets of rigid supports I10 to realize the transfer of the force, and meanwhile, the force can be amplified more through the cooperation of wedge faces for a plurality of times. The invention does not limit the actual installation number of the rigid support I10 and the rigid support II 17, and the rigid support I10 and the rigid support II 17 can be arranged according to the requirements of the rigid installation position of the actual tool rest.
The invention does not limit the actual number of loading blocks 7 to be placed on the rigid support I10, and the loading blocks 7 can be placed according to the application requirement of force.
4. Tool rest deformation detection frame
Referring to fig. 1, the tool rest deformation detection frame comprises an axial dial indicator 8, a radial dial indicator 4, an axial dial indicator bracket 9 and a radial dial indicator bracket 3.
The radial dial indicator 4 is fixed on the detected tool rest 40 through the radial dial indicator bracket 3, and the detection position of the radial dial indicator 4 is that the force applied on the cutter head 44 of the detected tool rest 40 and the tangential load on the special detection tool 16 for the working tool position are on the same horizontal line; similarly, the axial dial indicator 8 is fixed on the measured tool rest 40 through the axial dial indicator bracket 9, and the detection position of the axial dial indicator 8 is that the force applied by the cutter head 44 of the measured tool rest 40 and the axial load on the special tool 16 for the working tool position are in the same horizontal line. Similarly, a schematic illustration of the placement position of the tangential dial indicator is not given, but the vertical working position tool apron 43 of the tangential dial indicator is on the same horizontal line as the tangential loading force.
The working principle of the tool rest rigidity detection part is as follows: the tool holder rigidity means that when the tool holder is subjected to static load in a certain direction in the working position, the deformation of the tool holder measured in the direction opposite to the force application is in the rated range. The tool rest rigidity detection device can realize tangential, axial and radial loading only by changing the rigid support. The working position of the loading block 7 is adjusted, the loading block 7 moves along the designated direction by rotating the rotating handle 15, the load size is read by the pressure sensor 6, and the deformation displacement size of the cutterhead is read by the dial indicator.
2. Application method of geometric precision detection device of numerical control horizontal servo tool rest
The national standard GB/T20960-2007 shows that the numerical control horizontal servo knife rest has high requirement on rigidity precision, which generates great requirement on the operation quality of a detection operator, and particularly for non-contacted knife rest manufacturers such as user side and reliability personnel practitioners, the detection result is more interfered by operation errors. The principle and the test method of the rigidity detection of the tool rest are specified in national standards, factories and prior literature patents, but the content of the detection device and the using method of the detection device are not discussed, and the practical application of the rigidity detection of the tool rest is still a challenge. The invention relates to a detection device for detecting rigidity in axial, tangential and radial directions aiming at different types of numerical control horizontal servo knife rest, which jointly forms the rigidity precision of the knife rest. Meanwhile, the loading force is digitalized, the size of the device is reduced, the device is convenient to move, and a user is helped to develop the tool rest rigidity detection test quickly and conveniently.
Referring to fig. 8, the specific test procedure is as follows:
1) Mounting the measured tool rest 40 on a tool rest base plate 41;
2) According to the center height of the detected tool rest 40, the heights of the detection platform base plate I19 and the detection platform base plate II 12 are adjusted, and a detection table is installed;
2 tool post rigidity detection
2.1 mounting a special gauge 16 on the working position tool apron 43;
2.2, a tool rest rigidity detection frame is arranged, and comprises a rigidity support I10, a loading block 7, a pressure sensor 6, a loading head 20, a bolt 14, a spring 22 and the like;
2.3, adjusting the positions of the detection platform base plate I19, the detection platform base plate II 12, the rigid support I10 and the rigid support II 17, so as to align the working position of the loading block 7, enable the loading head 20 to be in the stressing direction, and realize tangential, axial or radial loading;
2.4, adjusting the positions of the tangential dial indicator, the axial dial indicator and the radial dial indicator according to the force application direction, so that the dial indicator is arranged on the same horizontal line in the opposite direction of force application;
2.5, starting the test, rotating the rotating handle 15, observing the static load application reading of the pressure sensor 6 and the displacement deformation reading of the dial indicator cutterhead at the corresponding position, and paying attention to slowly rotating the rotating handle 15 so as to avoid damaging the tested tool rest 40 due to overload;
2.6 recording data and analyzing the relationship of tool holder reliability to tool holder rigid precision retention.
Claims (7)
1. A rigidity detection device of a numerical control horizontal servo tool rest is characterized in that: the device consists of a tool rest test bed, a detection bed, a tool rest rigidity detection frame, a tool rest deformation detection frame and a horizontal iron (34);
the tool rest test bed is fixed on the ground flat iron (34), the tool rest rigidity detection frame is arranged on the detection bed, the detection bed is arranged on two right-angle sides of the tool rest test bed and is fixed on the ground flat iron (34), the tool rest rigidity detection frame can apply static load in tangential, radial and axial directions, and the tool rest deformation detection frame is adsorbed on the tool rest test bed and is positioned on a load applying direction line of the tool rest rigidity detection frame;
the tool rest rigidity detection frame part comprises a rotating handle (15), a clamping seat (2), a conical table (30), a loading block (7), a pressure sensor (6), a loading head (20), a spring (22), a guide post (26), a rotating handle bearing (27), a rigid support I (10), a rigid support II (17) and a bolt (14);
the rigid support I (10) is fixed on the detection platform II (11), and the rigid support II (17) is fixed on the detection platform I;
the rigid support I (10) is provided with a bolt through groove (23), a loading square groove (25) and a spring buckling groove (38); a guide post (26) is vertically welded in the middle of the rigid support I (10), and a rotating handle bearing (27) is embedded at the contact side of the guide post (26) and the rigid support I (10); the clamping seat (2) is provided with a bolt square hole (28), a U-shaped groove (31) and a spring through hole (45);
the bolt (14) passes through the bolt square hole (28) and is inserted into the bolt through groove (23) so as to connect the clamping seat (2) and the rigid support I (10); the four loading blocks (7) are respectively inserted into the loading square grooves (25), the loading blocks (7) in the up-down direction are directly connected with the spring buckling grooves (38) on the rigid support I (10) through springs (22), and the loading blocks in the left-right direction are connected with the spring buckling grooves (38) on the rigid support I (10) through springs (22) penetrating through the spring through holes (45); the loading head (20) is connected with the pressure sensor (6) through threads, and the pressure sensor (6) is connected with the loading block (7) through a connecting shaft (37); the upper part of the rotating handle (15) is clamped into the U-shaped groove (31) through the rotating handle clamping table (32), the middle part of the rotating handle (15) passes through the conical table (30) and the guide post (26) through the threaded shaft (35), and the lower part of the rotating handle (15) is matched with the rotating handle bearing (27);
the right end of the conical table (30) is matched with a threaded shaft (35) on the rotary handle (15) through threads, the through hole at the left end of the conical table (30) is in clearance fit with the guide post (26), and four wedge faces of the conical table (30) are respectively contacted with the wedge faces of four loading blocks (7) at corresponding positions;
the right end of the loading block (7) is in a conical table shape, the outline is consistent with the conical table (30), the loading block is inserted into the rigid support I (10), the loading block is connected with a plurality of sets of rigid supports I (10), the loading block (7) is matched with the rigid supports I (10), and the force transfer is realized.
2. The numerical control horizontal servo knife rest rigidity detection device according to claim 1, wherein:
the tool rest test bed comprises a tool rest (40) to be tested, a tool rest base plate (41), a tool rest support table (42), a tool rest (43), a cutter head (44) and a special detection tool (16); each station of a cutterhead (44) of the detected tool rest (40) is provided with a tool holder (43), the special detection tool (16) is arranged on the tool holder (43) of the working position according to an actual tool clamping mode, the detected tool rest (40) is fixed on a tool rest base plate (41), the tool rest base plate (41) is fixed on a tool rest supporting table (42), and the tool rest supporting table (42) is fixed on a ground level iron (34).
3. The numerical control horizontal servo knife rest rigidity detection device according to claim 2, wherein:
the detection platform comprises a detection platform I (1), a detection platform base plate I (19), a detection platform base I (18), a detection platform II (11), a detection platform base plate II (12) and a detection platform base II (13);
t-shaped grooves are formed in the detection platform I (1) and the detection platform II (11); the detection platform I (1) is connected with the detection platform base plate I (19) through bolts, the detection platform base plate I (19) is connected with the detection platform base plate I (18) through bolts, the detection platform base plate I (18) is fixed on the ground iron (34) and is arranged right in front of the detected tool rest (40);
the detection platform II (11) is connected with the detection platform base plate II (12) through bolts, the detection platform base plate II (12) is connected with the detection platform base plate II (13) through bolts, the detection platform base plate II (13) is fixed on the ground flat iron (34) and is arranged on the side face of a tool apron (43) of a working position of the tool rest (40) to be detected.
4. A numerical control horizontal servo knife rest rigidity detection device according to claim 3, wherein:
the rigid support I (10) is structurally consistent with the rigid support II (17).
5. The numerical control horizontal servo knife rest rigidity detection device according to claim 4, wherein:
the tool rest deformation detection frame comprises a tangential dial indicator, an axial dial indicator (8), a radial dial indicator (4), an axial dial indicator bracket (9) and a radial dial indicator bracket (3); the axial dial indicator (8) is fixed on the axial dial indicator bracket (9) according to a magnetic seat clamping mode, and the radial dial indicator (4) is fixed on the radial dial indicator bracket (3) according to a magnetic seat clamping mode; the vertical cutterhead of the axial dial indicator (8) and the axial loading force are positioned on the same horizontal line, the vertical cutterhead of the radial dial indicator (4) and the radial loading force are positioned on the same horizontal line, and the vertical working position tool apron (43) of the tangential dial indicator and the tangential loading force are positioned on the same horizontal line.
6. The method for using the numerical control horizontal servo tool rest rigidity detection device according to claim 5, comprising the following steps:
step one: mounting a measured tool rest (40) on a tool rest base plate (41);
step two: according to the center height of a detected tool rest (40), the heights of a detection platform base plate I (19) and a detection platform base plate II (12) are adjusted, and a detection table is installed;
step three: and (5) detecting the rigidity of the tool rest.
7. The method for using the rigidity detection device of the numerical control horizontal servo knife rest according to claim 6, wherein,
and step three, detecting the rigidity of the tool rest, which specifically comprises the following steps:
3.1, installing a special gauge (16) on the working position tool apron (43);
3.2, a tool rest rigidity detection frame is installed, and comprises a rigidity support I (10), a loading block (7), a pressure sensor (6), a loading head (20), a bolt (14) and a spring (22);
3.3 adjusting the positions of the detection platform base plate I (19), the detection platform base plate II (12), the rigid support I (10) and the rigid support II (17), so as to adjust the working position of the loading block (7), enable the loading head (20) to be in the stressing direction, and enable the loading head (20) to realize tangential, axial or radial loading;
3.4, adjusting the positions of the tangential dial indicator, the axial dial indicator and the radial dial indicator according to the force application direction, so that the dial indicator is arranged on the same horizontal line in the opposite direction of force application;
3.5, starting a test, rotating the rotary handle (15), observing a static load application reading of the pressure sensor (6) and a displacement deformation reading of a dial indicator cutter at a corresponding position, and paying attention to slowly rotating the rotary handle (15) so as to avoid damaging a tested cutter frame (40) due to overload;
3.6 recording data and analyzing the relation between the tool holder reliability and the tool holder rigidity precision retention.
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| CN110860949B (en) * | 2019-12-19 | 2024-07-02 | 吉林大学 | Detection device and detection method for positioning precision and repeated positioning precision of numerical control tool rest |
| CN114199599B (en) * | 2021-11-19 | 2023-08-22 | 北京工研精机股份有限公司 | Test bench for testing numerical control turntable |
| CN114593884A (en) * | 2022-03-14 | 2022-06-07 | 南京理工大学 | Numerical control tool rest static rigidity testing device and method |
| CN116698610A (en) * | 2023-08-07 | 2023-09-05 | 通用技术集团机床工程研究院有限公司 | Automatic detection mechanism and method for precision and rigidity of horizontal servo tool rest |
| CN117309286B (en) * | 2023-11-28 | 2024-02-09 | 潍坊盛世汽车系统有限公司 | Rigidity detection device for numerical control horizontal servo tool rest |
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