CN112504653A - Reliability test method for multi-working-condition simulation loading servo power tool rest - Google Patents
Reliability test method for multi-working-condition simulation loading servo power tool rest Download PDFInfo
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- CN112504653A CN112504653A CN202011404611.4A CN202011404611A CN112504653A CN 112504653 A CN112504653 A CN 112504653A CN 202011404611 A CN202011404611 A CN 202011404611A CN 112504653 A CN112504653 A CN 112504653A
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Abstract
The invention discloses a method for testing reliability of a multi-working-condition simulation loading servo power tool rest, which comprises the following steps: the method comprises the following steps of performing servo power tool rest transposition test, servo power tool rest multi-working-condition multi-stage parallel loading test and servo power tool rest power head loading test; adopt the servo power knife rest reliability test platform of multiplex condition simulation loading, it includes: the device comprises a control console, a tool rest seat, a testing machine, a dynamometer device seat, a loading device frame and a hydraulic system; the rotary base of the loading device can realize various machining and cutting loading loads, and full working condition tests, monitoring of loading force and closed-loop control are realized; the dynamometer loads the tool rest, monitoring and closed-loop control of cutting torque and rotating speed are achieved, control accuracy of the loading device is improved, and meanwhile load applying conditions of four dynamometers are compared.
Description
Technical Field
The invention belongs to the technical field of numerical control mechanical test equipment and methods, and particularly relates to a reliability test method for a multi-working-condition simulation loading servo power tool rest.
Background
The numerical control tool rest is used as a key functional component of the numerical control lathe, and the machining precision and the working efficiency of the lathe are directly influenced by the fault of the numerical control tool rest. The reliability test bed for the current domestic and foreign numerical control tool rests is mainly capable of only carrying out single working condition reliability tests on a single numerical control tool rest, although some test beds can carry out multi-working condition tests, the limitation on the working condition simulation conditions which can be carried out is large, the load simulation effect is poor, and the test bed is high in cost and low in space utilization rate due to various loading devices and accessories. For loading of a power head of a power servo tool rest, most test beds use a single dynamometer of the same kind to load torque on the power head, and the simulation condition of the load working condition of the power head of the tool rest is single.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, reliability tests cannot be simultaneously carried out on four tool rests, the loading mode of a common cutting load simulation working condition is single, the simulation condition of a load working condition is poor, the simulation of a load working condition applied to a power tool bit is single, and multi-working-condition loads in the working process of the tool rests cannot be better simulated, and provides a multi-working-condition simulation loading servo power tool rest reliability test platform and a method;
the utility model provides a servo power knife rest reliability test platform of multiplex condition simulation loading, it includes: the device comprises a control console 1, a tool rest seat 4, a testing machine, a dynamometer device seat 6, a loading device frame and a hydraulic system 8;
four tool rests and four measuring machines are arranged, and each tool rest is fixed on a ground flat iron 9 through a tool rest seat 4;
the loading device frame comprises: the loading device comprises a loading device lower base 71, a rotary driving unit and a loading device upper rotary base 73, wherein the loading device upper rotary base 73 is connected with the loading device lower base 71 through the rotary driving unit; four groups of analog loading units are arranged on the upper rotating base 73 of the loading device;
the four groups of analog loading units and the measuring machine are in loading connection with the tool rest;
the hydraulic system 8 provides oil pressure required by the hydraulic cylinder for the whole test platform;
and the signal input and output end arranged on the control console 1 is electrically connected with each tool rest, the testing machine, the loading device frame and the hydraulic system 8.
The tool rest is provided with a tool rest disc 3, and the tool rest disc comprises a tool rest power head 31 and a plurality of tool rest common tool bits 32;
the tool rest seat 4 comprises: a knife rest lower base 41, an arc-shaped connecting rod 42, a knife rest upper base 43, a knife rest lower base lug 44 and a connecting polished rod 45; the arc connecting rod 42 is arranged on the lower base 41 of the tool rest; the upper base 43 of the tool rest is arranged on the lower base 41 of the tool rest; the knife rest mounting device is connected with the polished rod 45 through the arc-shaped connecting rod 42, the knife rest upper base 43 and the knife rest lower base lug 44 to realize the locking position of the knife rest with the inclination angle of 0-45 degrees.
The testing machine 5 is divided into: an eddy current dynamometer 51, a hydraulic dynamometer 52, an electric dynamometer 53, and a hysteresis dynamometer 54; the eddy current dynamometer 51, the hydraulic dynamometer 52, the electric dynamometer 53 and the hysteresis dynamometer 54 are respectively provided with sensors, and the sensors respectively arranged on the dynamometers are connected with the signal input and output ends on the console 1.
The dynamometer device seat 6 includes: a lifting drive unit, a translation drive unit, a dynamometer moving table 63; the dynamometer is arranged on the dynamometer moving table 63; the lifting driving unit and the translation driving unit realize free change, horizontal translation and locking of the dynamometer in height; the dynamometer moving stage 63 is fixed to the ground block 9 by a lifting drive unit.
The loading device frame comprises: a loading device lower base 71, a rotary driving unit, a loading device upper rotary base 73 and an analog loading unit; a swing driving motor 721 provided in the swing driving unit drives the upper swing base 73 of the loading device to swing freely on the lower base 71 of the loading device.
The analog loading unit comprises: the device comprises a static force loading 741, an electro-hydraulic servo loading 742, a linear motor loading 743, a piezoelectric ceramic loading 744 and a hydraulic loading part, wherein the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are respectively arranged at the upper end of the upper rotating base 73 of the loading device through the hydraulic loading part.
The static force loading 741 provides static force simulation load for the tool rest;
the electro-hydraulic servo loading 742 comprises: the second force sensor 7421 and the electro-hydraulic servo controller 7422, the electro-hydraulic servo controller 7422 controls the hydraulic cylinder connected with the electro-hydraulic servo controller to provide dynamic load, and the electro-hydraulic servo load 742 provides low-frequency large-load dynamic simulation load effect for the tool rest;
the linear motor loading 743 is provided with a linear loading motor to provide a medium-high frequency dynamic simulation load effect for the tool rest;
the piezoelectric ceramic loading 744 is provided with a fourth force sensor 7441, a piezoelectric ceramic loading rod 7442, a force sensor 7443 and a piezoelectric ceramic loading seat 7444, a hydraulic cylinder provides static base force for piezoelectric ceramic loading before loading to meet the loading requirement of the piezoelectric ceramic loading rod 7442, the piezoelectric ceramic loading rod 7442 provides high-frequency dynamic load, the force sensor 7443 feeds back the high-frequency dynamic load applied by the piezoelectric ceramic loading rod 7442 to the control console 1, the piezoelectric ceramic loading seat 7444 provides stability for the piezoelectric ceramic loading rod 7442, and the piezoelectric ceramic loading provides high-frequency dynamic simulation load effect for the knife rest;
the first force sensor 7411, the second force sensor 7421, the linear loading motor and the fourth force sensor 7441 transmit the load applied by each loading device to the console 1 in time, thereby realizing the real-time control of the simulation load.
A reliability test method for a multi-working-condition simulation loading servo power tool rest is carried out by adopting a multi-working-condition simulation loading servo power tool rest reliability test platform, and comprises the following steps:
the first step is as follows: servo power tool rest transposition test
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that the eddy current dynamometer 51, the hydraulic dynamometer 52, the electric dynamometer 53, the hysteresis dynamometer 54 and the tool rest power head are in a separated state;
3) ensuring that the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are separated from the common head of the tool rest;
4) ensuring that the hydraulic system 10 is in a normal operating state;
5) selecting a servo power tool rest transposition test on the control console 1;
the console 1 is provided with an indexing program: setting forward or backward direction, transposition frequency, transposition step number, each transposition speed and total transposition time by the program according to the transposition test spectrum;
6) the control console starts a transposition test program and starts timing, and the four tool rests execute the same transposition program;
7) after the test is finished, automatically recording the transposition time, the transposition frequency, the transposition test spectrum and the fault data on a data analysis platform in the control console 1 for reliability analysis;
the second step is that: multi-working-condition multi-stage parallel loading test for servo power tool rest
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that the eddy current dynamometer 51, the hydraulic dynamometer 52, the electric dynamometer 53, the hysteresis dynamometer 54 and the tool rest power head are in a separated state;
3) ensuring that the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are separated from the common head of the tool rest;
4) the hydraulic system 10 belongs to a normal operating state;
5) adjusting the angle of a base of the loading device to ensure that 4 loading parts are all positioned at the test positions of 4 tool rests and common tool bits;
6) the four tool rests are ensured to be respectively installed in parallel, and are installed at an angle of 15 degrees, 30 degrees and 45 degrees, and the fixing conditions are good;
7) multi-working-condition multi-stage parallel loading test for selecting servo power tool rest on control console 1
8) The loading angle of the loading device is adjusted by the loading rotary seat 7412;
9) the console 1 is provided with an indexing program: the program comprises a static force loading 741, an electro-hydraulic servo loading 742, a linear motor loading 743, a loading head positioning program of a piezoelectric ceramic loading 744, a loading waveform program, a loading head retracting program, loading time and a 90-degree transposition program of a rotary seat 73 on a loading device after each tool rest finishes loading, wherein the program is circulated for four times to be a complete loading test, and the complete working condition tests of static force loading, low-frequency large load loading, medium-high frequency load loading and high-frequency load loading of each tool rest are finished under four different servo power tool rest installation working conditions of 15-degree angle installation, 30-degree installation and 45-degree installation;
10) the control console 1 starts a multi-working-condition multi-stage parallel loading test program of the servo power tool rest and starts timing, and four loading devices on the loading device 6 simultaneously perform a common tool bit loading test of the servo power tool rest;
11) after the test is finished, automatically feeding back the loading waveform, loading time and fault data of the common cutter head corresponding to each cutter frame to a data analysis platform of the console 1 for reliability analysis, wherein the loading waveform comprises a linear wave, a trapezoidal wave, a sine wave, a triangular wave, a square wave and a random wave;
the third step: servo power tool rest power head loading test
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are separated from the common head of the tool rest;
3) ensuring that the hydraulic system 10 is in a normal operating state;
4) selecting a servo power tool rest power head loading test on the control console 1;
5) the height of each hydraulic cylinder of static force loading 741, electro-hydraulic servo loading 742, linear motor loading 743 and piezoelectric ceramic loading 744 is respectively controlled to reach the working height by sending instructions through the console 1;
6) sending instructions to a mobile platform translation motor 621 in each translation driving unit through the console 1 to drive the horizontal movement of the four dynamometers; the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are respectively connected with a tool rest power head through a coupler 55;
7) the console 1 is provided with a loader: the loading program is a stepping loading spectrum, and each stage of loading comprises the rotating speed, the torque and the loading time of each dynamometer;
8) the control console 1 starts a servo power tool rest power head loading test and starts timing;
9) after the test is finished, the stepping loading spectrum and the fault data applied by the test of the power head of each tool rest are automatically fed back to the data analysis platform of the control console 1 for reliability analysis.
The invention provides a multi-working-condition simulation loading servo power tool rest reliability test platform and a method, wherein the test platform comprises the following steps: the device comprises a control console 1, a tool rest seat 4, a testing machine, a dynamometer device seat 6, a loading device frame and a hydraulic system 8; four tool rests and four measuring machines are arranged, and each tool rest is fixed on a ground flat iron 9 through a tool rest seat 4; the loading device frame includes: the loading device comprises a loading device lower base 71, a rotary driving unit and a loading device upper rotary base 73, wherein the loading device upper rotary base 73 is connected with the loading device lower base 71 through the rotary driving unit; the simulation loading unit and the measuring machine arranged on the upper rotating base 73 of the loading device are in loading connection with the tool rest; the control console 1 is electrically connected with the tool rest, the tool testing machine, the loading device frame and the hydraulic system 8; the rotary base of the loading device can realize various machining and cutting loading loads, and full working condition tests, monitoring of loading force and closed-loop control are realized; the dynamometer loads the tool rest, monitoring and closed-loop control of cutting torque and rotating speed are achieved, control accuracy of the loading device is improved, and meanwhile load applying conditions of four dynamometers are compared.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a multi-stage parallel servo power tool rest reliability test platform and a method capable of simultaneously carrying out multi-working-condition simulation loading on four numerically-controlled tool rests. The multi-working-condition simulation loading test can be simultaneously carried out on 4 tool rests, so that the efficiency of the reliability test of the tool rests is improved, and the test space and the equipment cost of the test device are saved.
2. The invention provides a loading device capable of simultaneously carrying out working condition simulation loading on 4 tool rests, which comprises four different loading devices, can respectively realize static loading, low-frequency large-load loading, medium-high frequency loading and high-frequency loading, and simultaneously realizes multi-working condition loading of each of the four tool rests by the four different loading devices through a rotating base, thereby not only saving the test space and the equipment cost of a test device, but also greatly reducing the operation cost of the test.
3. The four different loading devices on the loading device provided by the invention realize flexible conversion of the loading angle of the load through the adjustable rotating base, and greatly increase the flexibility of the test bed and the simulation test effect of the test bed through the adjustability of the angle of the tool rest base.
4. In the power head load simulation loading provided by the invention, the four tool rests are subjected to simulation load loading by adopting 4 different dynamometer machines, so that the multi-working-condition simulation load loading of the power head of the tool rest is realized, and the simulation effects of the four dynamometer machines can be compared.
5. According to the dynamometer mounting device, the height of the dynamometer is freely adjusted, controlled and locked through the hydraulic cylinder with the electro-hydraulic servo valve in height, the dynamometer is quickly loaded and evacuated through the movable platform controlled by the motor in the loading direction, and the loading test efficiency of the tool rest power head and the flexibility of the test platform are greatly improved.
Drawings
FIG. 1 is an overall structure diagram of a four-tool-holder simultaneous loading reliability testing device according to the present invention;
FIG. 2 is an isometric view of a tool holder mounting arrangement according to the present invention;
FIG. 3 is an isometric view of an electric dynamometer assembly according to the present disclosure;
FIG. 4 is an isometric view of a loading device according to the present invention;
FIG. 5 is a partial isometric view A of the loading device of the present invention;
FIG. 6 is a partial isometric view B of a loading device of the present invention;
FIG. 7 is an exploded view of the loading device of the present invention;
FIG. 8 is a flow chart of the indexing test of the multi-condition simulation loading servo power tool rest reliability test platform of the present invention;
FIG. 9 is a flow chart of a multi-condition simulation loading servo power tool rest reliability test platform and a common tool bit loading test method of the invention;
FIG. 10 is a flow chart of a test of reliability of a multi-condition simulation loading servo power tool rest and a test of loading of a power tool bit by the method of the invention;
the device comprises a control console 1, a tool rest base 4, a dynamometer device base 6, a loading device frame, a hydraulic system 8, a tool rest I21, a tool rest II 22, a tool rest III 23, a tool rest IV 24, a tool rest disc 3, a tool rest power head 31, a plurality of tool rest ordinary tool bits 32, a tool rest lower base 41, an arc-shaped connecting rod 42, a tool rest upper base 43, a tool rest lower base lug 44, a connecting polished rod 45, an eddy current dynamometer 51, a hydraulic dynamometer 52, an electric dynamometer 53, a hysteresis dynamometer 54, a coupler 55, a dynamometer machine base lower base 611, a lifting hydraulic cylinder 612, an electro-hydraulic servo valve 613, a guide post 614, a dynamometer machine base upper base 615, a moving table translation motor 621, a guide rail 622, a dynamometer moving table 63, a loading device lower base 71, a rotary driving motor 721, a worm 722, a bearing I723, a loading device swivel 73, a turbine 724, a bearing II 725, a loading device swivel 73, a static force loading 741, electro-hydraulic servo loading 742, linear motor loading 743, piezoelectric ceramic loading 744, loading support seat 751, loading rotating seat 752, hydraulic cylinder 753, first force sensor 7411, second force sensor 7421, electro-hydraulic servo controller 7422, fourth force sensor 7441, piezoelectric ceramic loading rod 7442, force sensor 7443 and piezoelectric ceramic loading seat 7444.
Detailed Description
The reliability test platform for the multi-working-condition simulation loading servo power tool rest is a test platform for reliability test of the multi-working-condition simulation loading servo power tool rest; the simulation test device can simultaneously complete the simulation of actual working load on four different installation working conditions, realize transposition on the servo power tool rest, static loading, low-frequency large-load loading, medium-high-frequency loading and high-frequency loading of a tool rest common tool bit and torque loading of a tool rest power head, and simultaneously provides a reliability test method for the multi-working-condition simulation loading servo power tool rest;
embodiment 1 reliability test platform for multi-working-condition simulation loading servo power tool rest
Referring to fig. 1 to 7, a platform for testing reliability of a multi-condition simulation loading servo power tool rest includes: the device comprises a control console 1, a tool rest seat 4, a testing machine, a dynamometer device seat 6, a loading device frame and a hydraulic system 8;
four tool rests and four measuring machines are arranged, and each tool rest and each measuring machine are respectively arranged on a ground flat iron 9 through a tool rest seat 4 and a dynamometer device seat 6;
the loading device frame comprises: the loading device comprises a loading device lower base 71, a rotary driving unit and a loading device upper rotary base 73, wherein the loading device upper rotary base 73 is connected with the loading device lower base 71 through the rotary driving unit; four groups of analog loading units are connected to the upper rotating base 73 of the loading device, and are respectively connected with the tool rest;
the hydraulic system 8 provides oil pressure required by the hydraulic cylinder for the whole test platform;
the signal input and output end arranged on the control console 1 is electrically connected with each tool rest, the testing machine, the loading device frame and the hydraulic system 8; the loading control and the load signal feedback of the whole test platform are realized.
The knife rest is provided with 4 tables which are divided into: the tool rest I21, the tool rest II 22, the tool rest III 23 and the tool rest IV 24; the tool rest I21, the tool rest II 22, the tool rest III 23 and the tool rest IV 24 are respectively fixed on the ground flat iron 9 through the tool rest seat 4 and are connected with the signal input and output ends on the control console 1 through cables; the angle adjustment of each tool rest seat 4 realizes the installation conditions of tool rests with various different angles;
the tool rest is provided with a tool rest disc 3, and the tool rest disc comprises a tool rest power head 31 and a plurality of tool rest common tool bits 32;
the tool rest seat 4 comprises: a knife rest lower base 41, an arc-shaped connecting rod 42, a knife rest upper base 43, a knife rest lower base lug 44 and a connecting polished rod 45;
the arc connecting rod 42 is arranged on the lower base 41 of the tool rest; the upper base 43 of the tool rest is arranged on the lower base 41 of the tool rest; the knife rest mounting device is connected with the polished rod 45 through the arc connecting rod 42, the knife rest upper base 43 and the knife rest lower base lug 44 to realize the locking position of the knife rest with the inclination angles of 0 degree, 15 degrees, 30 degrees and 45 degrees;
the measuring machine 5 comprises: an eddy current dynamometer 51, a hydraulic dynamometer 52, an electric dynamometer 53, and a hysteresis dynamometer 54; sensors are respectively arranged on the eddy current dynamometer 51, the hydraulic dynamometer 52, the electric dynamometer 53 and the hysteresis dynamometer 54, and the sensors respectively arranged on the dynamometers are connected with the signal input and output ends on the console 1;
the dynamometer device seat 6 includes: a lifting drive unit, a translation drive unit, a dynamometer moving table 63; the dynamometer is arranged on the dynamometer moving table 63; the dynamometer moving table 63 is fixed on the ground flat iron 9 through a lifting driving unit;
the lifting driving unit and the translation driving unit realize free change, horizontal translation and locking of the dynamometer in height;
the elevating driving unit includes: the dynamometer base lower base 611, the lifting hydraulic cylinder 612, the electro-hydraulic servo valve 613, the guide posts 614 and the dynamometer base upper base 615, and the guide posts 614 and the lifting hydraulic cylinder 612 are fixed on the dynamometer base lower base 611; dynamometer base upper seat 615 is slidably connected with guide posts 614; the lifting hydraulic cylinder 612 and the electro-hydraulic servo valve 613 realize the lifting adjustment of the dynamometer base upper seat 615;
the translation driving unit includes: a mobile platform translation motor 621, a guide rail 622 and a lead screw structure;
the dynamometer moving stage 63 is mounted on the guide rail 622; the lower end of the dynamometer moving table 63 is provided with a nut; the screw is sleeved on the lead screw, and the lead screw is driven to rotate by the translation motor 621 of the mobile platform; the moving platform translation motor 621 drives the dynamometer moving platform 63 to travel on the guide rail 622 through a screw rod structure;
the loading device frame comprises: a loading device lower base 71, a rotary driving unit, a loading device upper rotary base 73 and an analog loading unit;
the swing drive unit includes: the loading device comprises a rotary driving motor 721, a worm 722, a bearing I723, a turbine 724 and a bearing II 725, wherein the worm 722 is in meshing transmission with the turbine 724, and the turbine 724 is coupled to the lower base 71 of the loading device through the bearing I723; the upper rotating base 73 of the loading device is connected with the turbine 724 through a bearing II 725; the rotary driving motor 721 drives the worm wheel 724 to rotate through the worm 722;
the analog loading unit comprises: the device comprises a static force loading 741, an electro-hydraulic servo loading 742, a linear motor loading 743, a piezoelectric ceramic loading 744 and a hydraulic loading part, wherein the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are respectively arranged at the upper end of a rotary seat 73 on a loading device through the hydraulic loading part;
the hydraulic loading portion be equipped with four groups, every hydraulic loading portion includes: the loading support seat 751, the loading rotating seat 752 and the hydraulic cylinder 753, wherein the loading support seat 751 is Z-shaped, 4 of the loading support seat are symmetrically arranged at the upper end of the loading device upper rotating seat 73, the bottom end of the loading support seat 751 is connected with the loading device upper rotating seat 73 through 4 rectangular through holes through bolts, the upper end of the loading support seat is provided with two semicircular bulges which are symmetrically distributed, the semicircular bulges comprise two annular through grooves which are concentric with the semicircle and are used for being connected with the loading rotating seat 752 through bolts, the middle part of the Z shape comprises symmetrical reinforcing ribs for increasing the strength of the loading support seat 751, and the loading support seat 751;
the loading rotating seat 752 is in a hub shape, 4 loading rotating seats are respectively installed on 4 loading supporting seats 751, 4 through holes which are concentric and uniformly distributed with the discs are respectively distributed on the discs at two ends, the loading rotating seat 752 is connected with the loading supporting seats 751 through bolts, the middle part of the loading rotating seat 752 is a rectangular plate, and 4 through holes which are distributed in a rectangular shape are distributed on the rectangular plate and are used for being connected with the hydraulic cylinder 753 through bolts;
a first force sensor 7411 is arranged on the static force loading 741; static force loading 741 provides static force simulation load for the tool holder;
the electro-hydraulic servo loading 742 comprises: the second force sensor 7421 and the electro-hydraulic servo controller 7422, the electro-hydraulic servo controller 7422 controls the hydraulic cylinder connected with the electro-hydraulic servo controller to provide dynamic load, and the electro-hydraulic servo load 742 provides low-frequency large-load dynamic simulation load effect for the tool rest;
the linear motor loading 743 is provided with a linear loading motor to provide a medium-high frequency dynamic simulation load effect for the tool rest;
the piezoelectric ceramic loading 744 is provided with a fourth force sensor 7441, a piezoelectric ceramic loading rod 7442, a force sensor 7443 and a piezoelectric ceramic loading seat 7444, a hydraulic cylinder provides static base force for piezoelectric ceramic loading before loading to meet the loading requirement of the piezoelectric ceramic loading rod 7442, the piezoelectric ceramic loading rod 7442 provides high-frequency dynamic load, the force sensor 7443 feeds back the high-frequency dynamic load applied by the piezoelectric ceramic loading rod 7442 to the control console 1, the piezoelectric ceramic loading seat 7444 provides stability for the piezoelectric ceramic loading rod 7442, and the piezoelectric ceramic loading provides high-frequency dynamic simulation load effect for the knife rest;
the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 realize four different types of loading, and simulate the loading requirements and most working conditions in the actual working process of the tool rest; the rotary driving unit is used for rotary switching, four different loads are freely switched on the same tool rest, and the multi-working-condition simulation loading requirement of the same tool rest is met;
the first force sensor 7411, the second force sensor 7421, the linear loading motor and the fourth force sensor 7441 transmit the load applied by each loading device to the console 1 in time, thereby realizing the real-time control of the simulation load.
The invention relates to a reliability test method for a multi-working-condition simulation loading servo power tool rest, which is a reliability test method provided by the multi-working-condition simulation loading servo power tool rest reliability test platform in embodiment 1 and aiming at 4 tested servo power tool rests;
referring to fig. 1 to 10, the platform and the method for testing the reliability of the multi-condition simulated loading servo power tool rest provided by the invention specifically comprise the following steps:
1. servo power tool rest transposition test
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that the eddy current dynamometer 51, the hydraulic dynamometer 52, the electric dynamometer 53, the hysteresis dynamometer 54 and the tool rest power head are in a separated state;
3) ensuring that the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are separated from the common head of the tool rest;
4) ensuring that the hydraulic system 10 is in a normal operating state;
5) selecting a servo power tool rest transposition test on the control console 1;
the console 1 is provided with an indexing program: setting forward or backward direction, transposition frequency, transposition step number, each transposition speed and total transposition time by the program according to the transposition test spectrum;
6) the control console starts a transposition test program and starts timing, and the four tool rests execute the same transposition program;
7) after the test is finished, automatically recording the transposition time, the transposition frequency, the transposition test spectrum and the fault data on a data analysis platform in the control console 1 for reliability analysis;
2. multi-working-condition multi-stage parallel loading test for servo power tool rest
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that the eddy current dynamometer 51, the hydraulic dynamometer 52, the electric dynamometer 53, the hysteresis dynamometer 54 and the tool rest power head are in a separated state;
3) ensuring that the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are separated from the common head of the tool rest;
4) the hydraulic system 10 belongs to a normal operating state;
5) adjusting the angle of a base of the loading device to ensure that 4 loading parts are all positioned at the test positions of 4 tool rests and common tool bits;
6) the four tool rests are ensured to be respectively installed in parallel, and are installed at an angle of 15 degrees, 30 degrees and 45 degrees, and the fixing conditions are good;
7) multi-working-condition multi-stage parallel loading test for selecting servo power tool rest on control console 1
8) The loading angle of the loading device is adjusted by the loading rotary seat 7412;
9) the console 1 is provided with an indexing program: the program comprises a static force loading 741, an electro-hydraulic servo loading 742, a linear motor loading 743, a loading head positioning program of a piezoelectric ceramic loading 744, a loading waveform program, a loading head retracting program, loading time and a 90-degree transposition program of a rotary seat 73 on a loading device after each tool rest finishes loading, wherein the program is circulated for four times to be a complete loading test, and the complete working condition tests of static force loading, low-frequency large load loading, medium-high frequency load loading and high-frequency load loading of each tool rest are finished under four different servo power tool rest installation working conditions of 15-degree angle installation, 30-degree installation and 45-degree installation;
10) the control console 1 starts a multi-working-condition multi-stage parallel loading test program of the servo power tool rest and starts timing, and four loading devices on the loading device 6 simultaneously perform a common tool bit loading test of the servo power tool rest;
11) after the test is finished, automatically feeding back the loading waveform, loading time and fault data of the common cutter head corresponding to each cutter frame to a data analysis platform of the console 1 for reliability analysis, wherein the loading waveform comprises a linear wave, a trapezoidal wave, a sine wave, a triangular wave, a square wave and a random wave;
3. servo power tool rest power head loading test
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are separated from the common head of the tool rest;
3) ensuring that the hydraulic system 10 is in a normal operating state;
4) selecting a servo power tool rest power head loading test on the control console 1;
5) the height of each hydraulic cylinder of static force loading 741, electro-hydraulic servo loading 742, linear motor loading 743 and piezoelectric ceramic loading 744 is respectively controlled to reach the working height by sending instructions through the console 1;
6) sending instructions to a mobile platform translation motor 621 in each translation driving unit through the console 1 to drive the horizontal movement of the four dynamometers; the static force loading 741, the electro-hydraulic servo loading 742, the linear motor loading 743 and the piezoelectric ceramic loading 744 are respectively connected with a tool rest power head through a coupler 55;
7) the console 1 is provided with a loader: the loading program is a stepping loading spectrum, and each stage of loading comprises the rotating speed, the torque and the loading time of each dynamometer;
8) the control console 1 starts a servo power tool rest power head loading test and starts timing;
9) after the test is finished, automatically feeding the stepping loading spectrum and fault data applied by the test of each tool rest power head back to the data analysis platform of the control console 1 for reliability analysis;
the examples described herein are presented to enable those skilled in the art to understand and practice the invention, and are intended to be merely illustrative of the best mode or preferred embodiments of the invention. Equivalent structural changes or various modifications which do not require inventive work are within the scope of the present invention if those skilled in the art insist on the basic technical solution of the present invention.
Claims (8)
1. A multi-working-condition simulation loading servo power tool rest reliability testing method comprises the following steps:
the first step is as follows: servo power tool rest transposition test
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) the eddy current dynamometer (51), the hydraulic dynamometer (52), the electric dynamometer (53), the hysteresis dynamometer (54) and the tool rest power head are ensured to be in a separated state;
3) ensuring that static force loading (741), electro-hydraulic servo loading (742), linear motor loading (743), piezoelectric ceramic loading (744) and a tool rest are in a separation state when the tool rest is normally moved to the head;
4) ensuring that the hydraulic system (10) is in a normal working state;
5) selecting a servo power tool rest indexing test on a control console (1);
a control table (1) is provided with an indexing program: setting forward or backward direction, transposition frequency, transposition step number, each transposition speed and total transposition time by the program according to the transposition test spectrum;
6) the control console starts a transposition test program and starts timing, and the four tool rests execute the same transposition program;
7) after the test is finished, automatically recording the transposition time, the transposition frequency, the transposition test spectrum and the fault data on a data analysis platform in the console (1) for reliability analysis;
the second step is that: multi-working-condition multi-stage parallel loading test for servo power tool rest
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) the eddy current dynamometer (51), the hydraulic dynamometer (52), the electric dynamometer (53), the hysteresis dynamometer (54) and the tool rest power head are ensured to be in a separated state;
3) ensuring that static force loading (741), electro-hydraulic servo loading (742), linear motor loading (743), piezoelectric ceramic loading (744) and a tool rest are in a separation state when the tool rest is normally moved to the head;
4) the hydraulic system 10 belongs to a normal operating state;
5) adjusting the angle of a base of the loading device to ensure that 4 loading parts are all positioned at the test positions of 4 tool rests and common tool bits;
6) the four tool rests are ensured to be respectively installed in parallel, and are installed at an angle of 15 degrees, 30 degrees and 45 degrees, and the fixing conditions are good;
7) multi-working-condition multi-stage parallel type loading test for selecting servo power tool rest on control console (1)
8) The loading angle of the loading device is adjusted by a loading rotary seat (7412);
9) a control console (1) is provided with an indexing program: the program comprises a static force loading (741), an electro-hydraulic servo loading (742), a linear motor loading (743), a loading head positioning program of a piezoelectric ceramic loading (744), a loading waveform program, a loading head retracting program, a loading time and a 90-degree transposition program of a rotary seat (73) on a loading device after each tool rest finishes loading, wherein the program is circulated for four times to be a complete loading test, so that the parallel installation is realized, and each tool rest finishes the full working condition tests of static force loading, low-frequency large load loading, medium-high frequency load loading and high-frequency load loading under four different servo power tool rest installation working conditions of 15-degree angle installation, 30-degree installation and 45-degree installation;
10) the control console (1) starts a multi-working-condition multi-stage parallel loading test program of the servo power tool rest and starts timing, and four loading devices on the loading device (6) simultaneously perform a common tool bit loading test of the servo power tool rest;
11) after the test is finished, automatically feeding back the loading waveform, loading time and fault data of the common cutter head corresponding to each cutter frame to a data analysis platform of the console (1) for reliability analysis, wherein the loading waveform comprises a linear wave, a trapezoidal wave, a sine wave, a triangular wave, a square wave and a random wave;
the third step: servo power tool rest power head loading test
1) Keeping the test temperature constant at 23 ℃, and placing the test bed in the test environment for more than 8 hours;
2) ensuring that static force loading (741), electro-hydraulic servo loading (742), linear motor loading (743), piezoelectric ceramic loading (744) and a tool rest are in a separation state when the tool rest is normally moved to the head;
3) ensuring that the hydraulic system (10) is in a normal working state;
4) selecting a servo power tool rest power head loading test on the control console (1);
5) the height of each hydraulic cylinder of static force loading (741), electro-hydraulic servo loading (742), linear motor loading (743) and piezoelectric ceramic loading (744) is respectively controlled to reach the working height by sending instructions through a control console (1);
6) sending instructions to a mobile platform translation motor (621) in each translation driving unit through a control platform (1) to drive the four dynamometers to horizontally move; the static force loading (741), the electro-hydraulic servo loading (742), the linear motor loading (743) and the piezoelectric ceramic loading (744) are respectively connected with a tool rest power head through a coupler (55);
7) a loading program is set in a console (1): the loading program is a stepping loading spectrum, and each stage of loading comprises the rotating speed, the torque and the loading time of each dynamometer;
8) the control console (1) starts a servo power tool rest power head loading test and starts timing;
9) after the test is finished, the stepping loading spectrum and the fault data applied by the test of the power head of each tool rest are automatically fed back to the data analysis platform of the control console (1) for reliability analysis.
2. The method for testing the reliability of the multi-condition simulation loading servo power tool rest according to claim 1, wherein the test bed is a multi-condition simulation loading servo power tool rest reliability test platform, which comprises: the device comprises a control console (1), a tool rest seat (4), a work measuring machine, a dynamometer device seat (6), a loading device frame and a hydraulic system (8);
four tool rests and four measuring machines are arranged, and each tool rest is fixed on a ground flat iron (9) through a tool rest seat (4);
the loading device frame comprises: the device comprises a loading device lower base (71), a rotary driving unit and a loading device upper rotary base (73), wherein the loading device upper rotary base (73) is connected with the loading device lower base (71) through the rotary driving unit; four groups of analog loading units are arranged on the upper rotary base (73) of the loading device;
the four groups of analog loading units and the measuring machine are in loading connection with the tool rest;
the hydraulic system (8) provides oil pressure required by the hydraulic cylinder for the whole test platform;
and the signal input and output end arranged on the control console (1) is electrically connected with each tool rest, the testing machine, the loading device frame and the hydraulic system (8).
3. The method for testing the reliability of the multi-working-condition simulation loading servo power tool rest according to claim 2, characterized in that: the tool rest is provided with a tool rest disc (3) which comprises a tool rest power head (31) and a plurality of tool rest common tool bits (32);
the tool rest seat (4) comprises: a lower knife rest base (41), an arc-shaped connecting rod (42), an upper knife rest base (43), a lower knife rest base lug block (44) and a connecting polished rod (45); the arc connecting rod (42) is arranged on the lower base (41) of the tool rest; the upper base (43) of the tool rest is arranged on the lower base (41) of the tool rest; the knife rest mounting device is connected with a polished rod (45) through an arc-shaped connecting rod (42), a knife rest upper base (43) and a knife rest lower base lug block (44) to realize the locking position of the knife rest with an inclination angle of 0-45 degrees.
4. The method for testing the reliability of the multi-working-condition simulation loading servo power tool rest according to claim 3, wherein the method comprises the following steps: the testing machine 5 is divided into: an eddy current dynamometer (51), a hydraulic dynamometer (52), an electric dynamometer (53), and a hysteresis dynamometer (54); the eddy current dynamometer (51), the hydraulic dynamometer (52), the electric dynamometer (53) and the hysteresis dynamometer (54) are respectively provided with sensors, and the sensors respectively arranged on the dynamometers are connected with the signal input and output ends on the console (1).
5. The method for testing the reliability of the multi-working-condition simulation loading servo power tool rest according to the claims 1, 2, 3 or 4, is characterized in that: the dynamometer device seat (6) comprises: the device comprises a lifting driving unit, a translation driving unit and a dynamometer moving table (63); the dynamometer is arranged on a dynamometer mobile station (63); the lifting driving unit and the translation driving unit realize free change, horizontal translation and locking of the dynamometer in height; the dynamometer moving table (63) is fixed on a ground flat iron (9) through a lifting driving unit.
6. The method for testing the reliability of the multi-working-condition simulation loading servo power tool rest according to claim 5, wherein the method comprises the following steps: the loading device frame comprises: the device comprises a loading device lower base (71), a rotary driving unit, a loading device upper rotary base (73) and an analog loading unit; a rotary driving motor (721) arranged in the rotary driving unit drives a rotary seat (73) on the loading device to freely rotate on a lower base (71) of the loading device.
7. The method for testing the reliability of the multi-working-condition simulation loading servo power tool rest according to claim 6, wherein the method comprises the following steps: the analog loading unit comprises: the device comprises a static force loading part (741), an electro-hydraulic servo loading part (742), a linear motor loading part (743), a piezoelectric ceramic loading part (744) and a hydraulic loading part, wherein the static force loading part (741), the electro-hydraulic servo loading part (742), the linear motor loading part (743) and the piezoelectric ceramic loading part (744) are respectively arranged at the upper end of a rotary seat (73) on a loading device through the hydraulic loading part.
8. The method for testing the reliability of the multi-working-condition simulation loading servo power tool rest according to claim 7, wherein the method comprises the following steps:
the static force loading (741) provides static force simulation load for the tool rest;
the electro-hydraulic servo loading (742) comprises: the second force sensor (7421), the electro-hydraulic servo controller (7422) controls the hydraulic cylinder connected with the electro-hydraulic servo controller to provide dynamic load, and the electro-hydraulic servo load (742) provides low-frequency large-load dynamic simulation load action for the tool rest;
the linear motor loading (743) is provided with a linear loading motor to provide a medium-high frequency dynamic simulation load effect for the tool rest;
the piezoelectric ceramic loading device is characterized in that a fourth force sensor (7441), a piezoelectric ceramic loading rod (7442), a force sensor (7443) and a piezoelectric ceramic loading seat (7444) are arranged on the piezoelectric ceramic loading device (744), a hydraulic cylinder provides static base force for piezoelectric ceramic loading before loading to meet the loading requirement of the piezoelectric ceramic loading rod (7442), the piezoelectric ceramic loading rod (7442) provides high-frequency dynamic load, the force sensor (7443) feeds back high-frequency dynamic load applied by the piezoelectric ceramic loading rod (7442) to the control console (1), the piezoelectric ceramic loading seat (7444) provides stability for the piezoelectric ceramic loading rod (7442), and the piezoelectric ceramic loading provides high-frequency dynamic simulation loading effect for a tool rest;
the first force sensor (7411), the second force sensor (7421), the linear loading motor and the fourth force sensor (7441) transmit the load applied by each loading device to the console (1) in time, thereby realizing the real-time control of the simulation load.
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