CN103900778A - Device and method for dynamic characteristic testing experiment of double-drive sliding block type rolling and sliding composite guide rail - Google Patents
Device and method for dynamic characteristic testing experiment of double-drive sliding block type rolling and sliding composite guide rail Download PDFInfo
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- CN103900778A CN103900778A CN201410153756.XA CN201410153756A CN103900778A CN 103900778 A CN103900778 A CN 103900778A CN 201410153756 A CN201410153756 A CN 201410153756A CN 103900778 A CN103900778 A CN 103900778A
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Abstract
The invention discloses a device and method for a dynamic characteristic testing experiment of a double-drive sliding block type rolling and sliding composite guide rail. The device comprises a testing experiment platform and a data acquisition and analysis system. Compared with the prior art, the blank of tests of a feeding system of the rolling and sliding composite guide rail in the field of machine tool dynamic characteristic testing is filled up; by the adoption of the method for the dynamic characteristic testing experiment of the double-drive sliding block type rolling and sliding composite guide rail, through design of the positions and the number of distribution points, the dynamic characteristics of the experiment platform can be accurately reflected; according to the device and method for the dynamic characteristic testing experiment of the double-drive sliding block type rolling and sliding composite guide rail, for different test precision requirements, through adjustment of the number and the density of the distribution points, the work load can be adjusted, and efficiency can be improved.
Description
Technical field
The invention belongs to the technical field of complete machine tool dynamic analysis, particularly a kind of two drive slide block type skid composite guide rails dynamic characteristic test experimental provision and method.
Background technology
Machine tool guideway is as core component crucial in Modern NC Machine Tool feed system, and the dynamic perfromance of its feed system affects rigidity, precision and the precision stability of numerically-controlled machine to a great extent.And skid composite guide rails is little as a kind of frictional resistance simultaneously with rolling guide, exercise performance is good, there is again the guide rail that rail plate load-bearing capacity is strong, resistance to shock is good, in its structure owing to having rolling faying face and the face that is slidably connected simultaneously, contact condition complexity, and the dynamics of its feed system is also often the weak link in Machine Tool Feeding System, therefore need to invent a kind of test philosophy correct, skid composite guide rails feed system dynamic characteristic parameter simple in structure and that measuring accuracy is high is tested proving installation and method of testing.
What traditional machine tool horizontal carrying adopted with skid composite guide rails is separate type, on horizontal bearing face, be furnished with three to four line slideways, wherein rolling member is conventional standard four row circular arc type spherical guide or roller guides, and slide unit is single-row or double-row type is laminating or edge steel rail plate.But, in complete machine tool production run, due to the existence of mismachining tolerance and rigging error, make rolling loading end in separate type skid composite guide rail structure and the unbalance stress of slip loading end, need a large amount of manpower and materials to allocate smoothing to it, assembly technology complexity, is not therefore generalizable.Therefore Dual Drive slide block type skid composite guide rails dynamic characteristic experiment device and method of the present invention has innovation and practical value.In the prior art, there is following related invention:
Document 1: Chinese patent: rail plate faying face dynamic characteristic parameter proving installation and method of testing thereof, application number: 201010622646.5 and document 2: Chinese patent: face dynamic characteristic test device and method of testing are slidably connected, application number: CN201010617228.7 is all dynamic characteristic test devices of independent rail plate.
Document 3: Chinese patent: joint surface dynamic characteristic parameter testing device of rolling guide rail and method of testing thereof, application number: 2010560911.1 and document 4: Chinese patent: dynamic characteristic parameter recognition system of joint surfaces of rolling guide rails and recognition methods, application number: 201010298969.3, are all dynamic characteristic test devices of independent rolling guide.
As from the foregoing, in (1) prior art, lack dynamic characteristic test device and the method for testing of driving slide block type skid composite guide rails feed system for two; (2) effectively experiment is not combined with finite element analysis; (3) can not be generalized to the existing face that is slidably connected, have again in the complicated feed system of rolling faying face; (4) can not be applied to the face of being slidably connected and rolling faying face concentrates in a feed system on guide rail.
Summary of the invention
The object of the present invention is to provide a kind of two drive slide block type skid composite guide rails dynamic characteristic test experimental provision and method.
The technical solution that realizes the object of the invention is: a kind of two slide block type skid composite guide rails dynamic characteristic test test units that drive, comprise test platform and data collection and analysis system, described testing experiment platform comprises base, leading screw, skid composite guide rails, web joint;
The leading screw, the skid composite guide rails that are parallel to each other are connected on base, the quantity of described leading screw, skid composite guide rails is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, and rolling joint portion can be combined on a guide rail with the portion of being slidably connected thus.Web joint is arranged on the top of leading screw, skid composite guide rails, connects together;
Described data collection and analysis system comprises acceleration transducer, power hammer, charge amplifier, data acquisition unit and computing machine; Wherein acceleration transducer is arranged on test platform, for the dynamic characteristic parameter of collecting test platform, power hammer is arranged near the turning of plane on web joint, and described acceleration transducer is all connected with charge amplifier with power hammer, and charge amplifier is connected with computing machine by data acquisition unit.
A method of testing for double lead-screw slide block type skid composite guide rails feeding dynamic characteristic test test unit based on above-mentioned, comprises the following steps:
Step 1, installation testing platform: the leading screw, the skid composite guide rails that on base, are connected and are parallel to each other, the quantity of described leading screw, skid composite guide rails is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, rolling faying face is positioned at the oblique side place adjacent with the face that is slidably connected, and rolling joint portion can be combined on a guide rail with the portion of being slidably connected thus.Web joint is arranged on the top of leading screw, skid composite guide rails, connects together.
Step 2, installation data collection and analytic system: first degree of will speed up sensor setting one layout on, described acceleration transducer all layout meet 2 requirement: A, layouting to show the profile of test platform model; B, layouting is positioned at each contact site dynamic characteristic test point; Then by data line, 4 acceleration transducer output terminals are connected with the input end of charge amplifier, charge amplifier output terminal is connected with data acquisition unit input end, again data acquisition unit is crossed to data line with computer expert and be connected, the output terminal of power hammer is connected with the input end of power amplifier; Near the turning of power hammer beating position plane on web joint, described power hammer can knock test platform by three of a cartesian coordinate system direction, obtains the three-dimensional dynamic Characteristic Data of test platform;
Step 3, test parameter is set, is specially: determine frequency sweeping scope, the improvement factor of the enlargement factor of charge amplifier, the electric current of charge amplifier and voltage, power hammer power sensor and acceleration transducer;
Step 4, start test, along direction percussion power hammer of cartesian coordinate system, obtain experimental data, return to afterwards step 2, and sensor is placed into the next one layouts above, layout and all tested until all; Change power hammer knocks direction, repeats all tests of layouting, and so circulation, until complete the data test of three directions; After having tested, save data, obtains natural frequency and the vibration shape of experimental system.
The present invention compared with prior art, its remarkable advantage is: (1) the present invention has made up the blank of machine dynamic characteristics field tests aspect double lead-screw slide block type skid composite guide rails feed system, first rolling joint portion and the portion of being slidably connected are concentrated on a guide rail, and combine and carry out dynamic analysis with two feed systems of driving; (2) method of the present invention can be generalized in the complicated feed system dynamic characteristic experiment of various lathes; (3) testing table of the present invention is separated institute's research object from integrated machine bed structure, set up independently feed system experiment porch, simple in structure, only drive for rolling joint portion, the portion pair that is slidably connected the dynamic analysis that feed system combines, be not subject to other positions disturb and affect; (4) test method of the present invention is by the position of layouting and the design of quantity, the dynamic perfromance of the platform of reaction test accurately; (5) the present invention can be for different measuring accuracy requirements, and the quantity of layouting by adjusting and density size are adjusted workload, raise the efficiency.
Brief description of the drawings
Fig. 1 is two drive slide block type skid composite guide rails feeding system structure and dynamic characteristic experiment equipments overall structure figure of the present invention.
Fig. 2 is the acceleration transducer cloth point diagram of dynamic characteristic experiment test of the present invention.
Fig. 3 is the skeleton diagram that dynamic characteristic test software MaCras of the present invention sets up.
The implication of number in the figure representative is:
1-base, 2-leading screw, 3-skid composite guide rails, 4-acceleration transducer, 5-power hammer, 6-web joint, 7-charge amplifier, 8-data acquisition unit, 9-computing machine.
Embodiment
In conjunction with Fig. 1 to Fig. 3, the two slide block type skid composite guide rails feeding dynamic characteristic test test units that drive of one of the present invention, comprise test platform and data collection and analysis system, described testing experiment platform comprises base 1, leading screw 2, skid composite guide rails 3, web joint 6;
The leading screw 2, the skid composite guide rails 3 that are parallel to each other are connected on base 1, the quantity of described leading screw 2, skid composite guide rails 3 is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, web joint 6 is arranged on the top of leading screw 2, skid composite guide rails 3, connects together;
Described data collection and analysis system comprises acceleration transducer 4, power hammer 5, charge amplifier 7, data acquisition unit 8 and computing machine 9; Wherein acceleration transducer 4 is arranged on test platform, for the dynamic characteristic parameter of collecting test platform, power hammer 5 is arranged near the turning of plane on web joint 6, described acceleration transducer 4 is all connected with charge amplifier 7 with power hammer 5, and charge amplifier 7 is connected with computing machine 9 by data acquisition unit 8.
Based on above-mentioned two method of testings of driving slide block type skid composite guide rails dynamic characteristic test test unit, comprise the following steps:
Step 1, installation testing platform: the leading screw 2, the skid composite guide rails 3 that on base 1, are connected and are parallel to each other, the quantity of described leading screw 2, skid composite guide rails 3 is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, web joint 6 is arranged on the top of leading screw 2, skid composite guide rails 3, connects together;
Step 2, installation data collection and analytic system: first degree of will speed up sensor 4 be arranged on one layout upper, described acceleration transducer 4 all layout meet 2 requirement: A, layouting to show the profile of test platform model; B, layouting is positioned at each contact site dynamic characteristic test point; Then be connected with the input end of charge amplifier 7 by data line degree of will speed up sensor 4 output terminals, charge amplifier 7 output terminals are connected with data acquisition unit 8 input ends, data acquisition unit 8 is connected with computer 9, the output terminal of power hammer 5 is connected with the input end of power amplifier 7 again; Power is hammered into shape near the turning of 5 beating positions plane on web joint 6, and described power hammer 5 can knock test platform by three of a cartesian coordinate system direction, obtains the three-dimensional dynamic Characteristic Data of test platform;
Step 3, test parameter is set, is specially: determine frequency sweeping scope, the enlargement factor of charge amplifier 7, the electric current of charge amplifier 7 and voltage, power are hammered the improvement factor of 5 power sensors and acceleration transducer 4 into shape;
Step 4, start test, along direction percussion power hammer of cartesian coordinate system, obtain experimental data, return to afterwards step 2, and sensor is placed into the next one layouts above, layout and all tested until all; Change power hammer knocks direction, repeats all tests of layouting, and so circulation, until complete the data test of three directions; After having tested, save data, obtains natural frequency and the vibration shape of experimental system.
Below in conjunction with embodiment, the present invention is done to further detailed description:
A kind of pair is driven slide block type skid composite guide rails dynamic characteristic test test unit, comprises test platform and data collection and analysis system, and described testing experiment platform comprises base 1, leading screw 2, skid composite guide rails 3, web joint 6;
The leading screw 2, the skid composite guide rails 3 that are parallel to each other are connected on base 1, the quantity of described leading screw 2, skid composite guide rails 3 is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, web joint 6 is arranged on the top of leading screw 2, skid composite guide rails 3, connects together;
Described data collection and analysis system comprises acceleration transducer 4, power hammer 5, charge amplifier 7, data acquisition unit 8 and computing machine 9; Wherein acceleration transducer 4 is arranged on test platform, for the dynamic characteristic parameter of collecting test platform, power hammer 5 is arranged near the turning of plane on web joint 6, described acceleration transducer 4 is all connected with charge amplifier 7 with power hammer 5, and charge amplifier 7 is connected with computing machine 9 by data acquisition unit 8.
Based on above-mentioned two method of testings of driving slide block type skid composite guide rails dynamic characteristic test test unit, comprise the following steps:
Step 1, installation testing platform: the leading screw 2, the skid composite guide rails 3 that on base 1, are connected and are parallel to each other, the quantity of described leading screw 2, skid composite guide rails 3 is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, and rolling joint portion can be combined on a guide rail with the portion of being slidably connected thus.Web joint 6 is arranged on the top of leading screw 2, skid composite guide rails 3, connects together;
Step 2, installation data collection and analytic system: first degree of will speed up sensor 4 be arranged on one layout upper, described acceleration transducer 4 all layout meet 2 requirement: A, layouting to show the profile of test platform model; B, layouting is positioned at each contact site dynamic characteristic test point; Then by data line, 4 acceleration transducer 4 output terminals are connected with the input end of charge amplifier 7, charge amplifier 7 output terminals are connected with data acquisition unit 8 input ends, data acquisition unit 8 is connected by data line with computer 9, the output terminal of power hammer 5 is connected with the input end of power amplifier 7 again; Power is hammered into shape near the turning of 5 beating positions plane on web joint 6, and described power hammer 5 can knock test platform by three of a cartesian coordinate system direction, obtains the three-dimensional dynamic Characteristic Data of test platform;
Machinery and Constructional Modal Analysis MaCras module in the vibration of installing in step 3, startup computer and dynamic signal acquisition analytic system V7.1, carry out modeling and measurement parameter setting, be specially: determine frequency sweeping scope, the enlargement factor of charge amplifier 7, the electric current of power amplifier 8 and voltage, power are hammered the improvement factor of 5 power sensors and three-dimensional acceleration transducer 4 into shape; Set up experiment porch skeleton diagram by interconnecting between layouting, as shown in Figure 3.
Step 4, start test, hammer and knock Fig. 1 power hammer point by power, draw output frequency response function, choose and to obtain good experimental data.Sensor is placed into next position of layouting, repeats above-mentioned steps, until all the layouting of Fig. 2 all tests.Change power hammer knocks direction, repeats above-mentioned all tests of layouting.Until knocking all, three-dimensional completes.Test completes, and save data obtains natural frequency and the vibration shape of experimental system;
Result and the test bed testing result out of step 6, contrast finite element analysis, thereby the accuracy of demonstration test platform and method of testing.Comparative result is as shown in table 1:
The comparison of table 1 simulation and experiment result
| Order | Test frequency (Hz) | Stimulation frequency (Hz) | Error % |
| 5 | 93.2 | 106.5 | 14.3 |
| 6 | 170.3 | 189.2 | 11.1 |
| 7 | 213.2 | 227.3 | 6.6 |
| 8 | 216.4 | 248.4 | 14.8 |
| 9 | 277.5 | 308.7 | 11.2 |
| 10 | 448.7 | 492.6 | 9.8 |
As shown in Table 1, experimental result and simulation analysis error are little,, in 15%, in tolerance interval, are all the method for testings that a kind of degree of accuracy is higher, can promote the use of.
Claims (2)
1. two drive a slide block type skid composite guide rails dynamic characteristic test test unit, it is characterized in that, comprise test platform and data collection and analysis system, described testing experiment platform comprises base [1], leading screw [2], skid composite guide rails [3], web joint [6];
The leading screw [2], the skid composite guide rails [3] that are parallel to each other are connected on base [1], the quantity of described leading screw [2], skid composite guide rails [3] is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, web joint [6] is arranged on the top of leading screw [2], skid composite guide rails [3], connects together;
Described data collection and analysis system comprises acceleration transducer [4], power hammer [5], charge amplifier [7], data acquisition unit [8] and computing machine [9]; Wherein acceleration transducer [4] is arranged on test platform, for the dynamic characteristic parameter of collecting test platform, power hammer [5] is arranged near the turning of the upper plane of web joint [6], described acceleration transducer [4] is all connected with charge amplifier [7] with power hammer [5], and charge amplifier [7] is connected with computing machine [9] by data acquisition unit [8].
2. based on two method of testings of driving slide block type skid composite guide rails dynamic characteristic test test unit claimed in claim 1, it is characterized in that, comprise the following steps:
Step 1, installation testing platform: the leading screw [2], the skid composite guide rails [3] that on base [1], are connected and are parallel to each other, the quantity of described leading screw [2], skid composite guide rails [3] is two, the arranged outside two rhizoid thick sticks of two skid composite guide rails, the face of being slidably connected of skid composite guide rails is positioned at the perpendicular direction of method, the rolling faying face of skid composite guide rails is positioned at the oblique side place adjacent with the face that is slidably connected, web joint [6] is arranged on the top of leading screw [2], skid composite guide rails [3], connects together;
Step 2, installation data collection and analytic system: first degree of will speed up sensor [4] be arranged on one layout upper, described acceleration transducer [4] all layout meet 2 requirement: A, layouting to show the profile of test platform model; B, layouting is positioned at each contact site dynamic characteristic test point; Then be connected with the input end of charge amplifier [7] by data line degree of will speed up sensor [4] output terminal, charge amplifier [7] output terminal is connected with data acquisition unit [8] input end, data acquisition unit [8] is connected with computer [9], the output terminal of power hammer [5] is connected with the input end of power amplifier [7] again; Power hammer [5] beating position is near the turning of the upper plane of web joint [6], and described power hammer [5] can knock test platform by three of a cartesian coordinate system direction, obtains the three-dimensional dynamic Characteristic Data of test platform;
Step 3, test parameter is set, is specially: determine frequency sweeping scope, the improvement factor of the enlargement factor of charge amplifier [7], the electric current of charge amplifier [7] and voltage, power hammer [5] power sensor and acceleration transducer [4];
Step 4, start test, along direction percussion power hammer of cartesian coordinate system, obtain experimental data, return to afterwards step 2, and sensor is placed into the next one layouts above, layout and all tested until all; Change power hammer knocks direction, repeats all tests of layouting, and so circulation, until complete the data test of three directions; After having tested, save data, obtains natural frequency and the vibration shape of experimental system.
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| CN111189371A (en) * | 2020-01-15 | 2020-05-22 | 中国建材国际工程集团有限公司 | Linear guide rail installation precision detection device and detection method thereof |
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| CN111941023A (en) * | 2020-07-27 | 2020-11-17 | 天津大学 | Measuring device and method for guiding low-stress assembly of linear feeding guide rail |
| CN112014054A (en) * | 2020-08-26 | 2020-12-01 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for testing dynamic stiffness of vehicle door lock catch and storage medium |
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| CN111577760A (en) * | 2020-06-17 | 2020-08-25 | 李金� | Dual-mode linear guide rail |
| CN111941023A (en) * | 2020-07-27 | 2020-11-17 | 天津大学 | Measuring device and method for guiding low-stress assembly of linear feeding guide rail |
| CN112014054A (en) * | 2020-08-26 | 2020-12-01 | 安徽江淮汽车集团股份有限公司 | Method, device and equipment for testing dynamic stiffness of vehicle door lock catch and storage medium |
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Application publication date: 20140702 |