CN101982749B - Method and device for measuring dynamic characteristics of indexing motion of tool holder - Google Patents

Method and device for measuring dynamic characteristics of indexing motion of tool holder Download PDF

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Publication number
CN101982749B
CN101982749B CN2010105020145A CN201010502014A CN101982749B CN 101982749 B CN101982749 B CN 101982749B CN 2010105020145 A CN2010105020145 A CN 2010105020145A CN 201010502014 A CN201010502014 A CN 201010502014A CN 101982749 B CN101982749 B CN 101982749B
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China
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knife rest
cutterhead
scrambler
industrial computer
angular velocity
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CN2010105020145A
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CN101982749A (en
Inventor
苏达智
卢晓红
王福吉
张智聪
牟日波
于小艳
徐立伟
律志强
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DALIAN GAOJIN NUMERICAL CONTROL GROUP CORP Ltd
Dalian University of Technology
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DALIAN GAOJIN NUMERICAL CONTROL GROUP CORP Ltd
Dalian University of Technology
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Abstract

The invention relates to a method and device for measuring dynamic characteristics of indexing motion of a tool holder, belonging to the field of measurement of dynamic characteristics of indexing motion of the tool holder. The invention in particular relates to a method and device for measuring dynamic characteristics of indexing motion of the tool holder, with a coder as the sensing element. In the method, such devices as the coder, a universal PC counting card, an industrial personal computer (IPC) and the like are utilized, wherein the coder is used for acquiring the magnitude of angular velocity of a disk at each moment in the process of tool changing of the tool holder and converting the magnitude of angular velocity to the electric signal; the counting card is used for sending the electric signal to the IPC; and the IPC is used for drawing the data into angular velocity change curves of the disk by utilizing measuring software. Vibration, twisting motion, acceleration and deceleration and inconsistency of each indexing cycle in indexing motion of the tool holder can be judged by analyzing the curves. The qualified range of the tool holder is defined by two curves. The invention has large measurement range and long service life, and the device has high response speed and simple structure and is secure and reliable.

Description

Measure knife rest dividing movement method of dynamic and device
Technical field
The invention belongs to knife rest dividing movement dynamic characteristic measuring field, particularly a kind of is the knife rest dividing movement dynamic characteristic measuring method and apparatus of sensing element with the scrambler.
Background technology
In recent years, along with equipment manufacture overall technology level improves constantly, to the key feature of numerically controlled lathe and turnning and milling Compositions of metal-working machines---the performance requirement of knife rest is also increasingly high.High speed property is the main direction of knife rest future development, but performance index such as its bearing accuracy, vibration and twisting also can receive influence to some extent high speed the time, and these performance parameters are directly connected to the product quality of knife rest.At present, the disappearance of knife rest dividing movement dynamic characteristic test method and imperfection have seriously restricted the development of numerically controlled lathe and turnning and milling Compositions of metal-working machines industry, and it is very necessary therefore analyzing and study knife rest integration test technology.
In actual process, the dividing movement dynamic perfromance of knife rest all has very big influence to the whole machining process process.Higher tool-changing speed can effectively reduce tool change time, and then improves working (machining) efficiency; Cutterhead bearing accuracy when tool changing finishes directly influences the dimensional accuracy and the positional precision of processing work, if the location out of true not only increases rejection rate, also need spend the extra time to carry out the position adjustment, has increased the time of tool changing, and then has influenced working (machining) efficiency; Be equipped with many on each cutterhead cutter; The weight of these cutters generally is inequality, therefore, under situation about running up, just might produce eccentric moment; And then cause knife rest in operation process, to vibrate, when serious even cause the knife rest can't operate as normal.Can tremble owing to the influence of various factors cutterhead in the exchanging knives process; When tool changing finishes because location out of true, cutterhead possibly not arrive or surpass desirable position, causes cutterhead in locking, to take place forward or play backward, just so-called twisting; Vibration and twisting all can have a strong impact on the life-span of cutterhead and the repeatable accuracy of knife rest tool changing, so the stationarity of exchanging knives process acceleration and deceleration also is a very important kinetic characteristic.In sum, knife rest dividing movement dynamic perfromance mainly comprises: tool-changing speed, tool changing bearing accuracy, exchanging knives process (vibration, twisting) etc. stably.At present; Knife rest detent mechanism commonly used on the numerically-controlled machine is two-piece type fluted disc and three-chip type fluted disc structure, and wherein, two-piece type fluted disc mechanism is in tool changing; The drive unit inner by knife rest drives; The action of the fluted disc mechanism on the knife rest is for unclamping, take off tooth, and cutterhead carries out axially-movable then, and the axially-movable during this tool changing is so-called cutter lifting in the engineering just.System is different with the two-piece type fluted disc, and the three-chip type fluted disc does not have axial motion in tool changing.
People such as Deng Le means through theoretical analysis in " hydraulic copying attachment dynamic analysis " have been carried out stability analysis to hydraulic copying attachment, utilize same analytical approach to carry out the specificity analysis of servo-valve input displacement and load force disturbance; People such as Wang Shiyi have gone research to protruding variable ellipse piston profile processing copying tool post dynamic perfromance note in " piston machine tool copying tool post Research on Dynamic Characteristic "; Found the relation between frequency of operation and the knife rest natural frequency, and the relation between copying system frequency characteristic and frequency of operation, the dynamic error.But above-mentioned this art document does not all relate to the measurement of knife rest dividing movement dynamic perfromance.
Accurate detection means and perfect test platform are further to study properties of product and guarantee product quality premise; And at present; The experiment of knife rest both at home and abroad can only be carried out the detection of tool-changing speed, bearing accuracy etc., and above-mentioned detection index is only passed through the experience subjective determination to the influence of knife rest overall dynamics characteristic.Do not have as yet can be in the knife rest course of work report of the measurement mechanism of detection of dynamic knife rest dividing movement dynamic perfromance.
Summary of the invention
The technical matters that the present invention will solve is a problem of measuring knife rest dividing movement dynamic perfromance technical deficiency to existing, and design a kind of is sensing element with scrambler 7, the data after the conversion of numbered card 14 received code devices, and data are sent to industrial computer 15.Industrial computer 15 is depicted as curve map with the data that scrambler records, and can draw the pick-up unit of knife rest dividing movement dynamic perfromance to curve map analysis, solves the difficult problem that knife rest dividing movement dynamic perfromance is difficult to measure.
The technical scheme that the present invention adopts is: adopt scrambler 7, universal PC numbered card 14 and industrial computer 15 to measure; Obtain each magnitude of angular velocity constantly of cutterhead in the knife rest exchanging knives process by scrambler 7; And magnitude of angular velocity is converted into electric signal; Send to industrial computer 15 by numbered card 14; Industrial computer 15 is depicted as the angular velocity varies curve of cutterhead through Survey Software with these data, and industrial computer 15 goes out cutterhead each angular velocity constantly in the course of the work according to these calculated signals, through analyzing vibration and the twisting situation that angular velocity varies draws cutterhead.And the indexing accuracy of knife rest can obtain from the variation in angular displacement amount that scrambler 7 records intuitively;
The concrete steps of method are following:
(1) measurement mechanism is in the installation of experiment porch
The knife rest casing 11 that will have drive unit, speed change gear earlier is installed on the experiment porch, on cutterhead 10, loads onto rotating shaft 9, and the inner ring with scrambler 7 is contained in the rotating shaft 9 again; Be contained in magnetic force gauge stand 1 on the knife rest casing 11, montant 13 is contained on the magnetic force gauge stand 1, cross bar 12 is clamped on the montant 13; On the cross bar 12 of magnetic force gauge stand 1, load onto L bracket plate 5; Be fixed together the outer ring of the scrambler that installs 7 and L bracket plate 5 usefulness screws 6 through arcuate bombing leaf 8, the outer ring of scrambler 7 can not be rotated with cutterhead 10, the cross bar 12 of regulating magnetic force gauge stand 1 on montant 13 height and with the angle on cutterhead 10 surfaces; Make it and cutterhead 10 Surface Vertical; Link to each other numbered card 14 with scrambler 7, couple together industrial computer 15 and numbered card 14 at last, be connected printer 16 on the industrial computer 15.
(2) setting of testing software
Set the resolution of testing software, resolution is meant that numbered card reads interlude between two data, and interlude is short, and measuring accuracy is just high, and interval time is long, and precision is just low.
(3) measure
At first define the knife rest acceptability limit; Define with two curves; Article one, during the curve representation tool changing allow the top speed that reaches, the minimum speed that allows during another curve representation tool changing, the zone between these two curves is exactly qualified district; When rate curve is that each item dynamic perfromance of knife rest dividing movement is in optimal state when revising sinusoidal curve.
This measurement knife rest dividing movement method of dynamic; The characteristic of its device that adopts is, cutterhead 10 is contained on the central shaft of knife rest casing 11, and rotating shaft 9 is contained on the center pit of tested cutterhead 10; Be contained in the inner ring of scrambler 7 in the rotating shaft 9; The outer ring of scrambler 7 is fixed on the L bracket plate 5 through arcuate bombing leaf 8 with two screws 6, and the shape of cross section of L bracket plate 5 is a flute profile, and two apertures 3 are arranged on plane on the L bracket plate 5; Little axle 2 is housed respectively in two apertures 3, on two little axles 2, is separately installed with bearing 4; Magnetic force gauge stand 1 is installed in knife rest casing 11 upper ends; The cross bar 12 of magnetic force gauge stand 1 is clipped in two bearings 4 on plane on the L bracket plate 5; The rotation that rotation through restriction L bracket plate 5 comes limited scrambler 7 outer rings; Scrambler 7 is linked to each other with numbered card 14, and numbered card 14 is connected on the industrial computer 15.
Remarkable result of the present invention is to be sensing element with scrambler 7; Scrambler 7 is converted into electric signal with the angular displacement that records; Electric signal after numbered card 14 is changed scrambler 7 sends to industrial computer 15; Industrial computer 15 is depicted as curve map with these electric signal through testing software; Print the relation curve between time and the cutterhead rotational angular velocity by printer 16, can judge vibration, twisting, acceleration and deceleration process and each calibration round-robin inconsistency in this knife rest dividing movement through analyzing these curves.It is big that scrambler has measurement range, characteristics such as long service life, and the response speed of this device is fast, and simple in structure, solid and reliable.
Description of drawings
Fig. 1-measuring system synoptic diagram, Fig. 2 are the partial enlarged drawing of I among Fig. 1, and Fig. 3 is the partial enlarged drawing of J among Fig. 1, and Fig. 4 is the axonometric drawing of measurement mechanism wiring layout.Wherein: 1-magnetic force gauge stand, the little axle of 2-, 3-aperture, 4-bearing, 5-L shape supporting plate; The 6-screw, 7-scrambler, 8-arcuate bombing leaf, 9-rotating shaft, 10-cutterhead; 11-knife rest casing, 12-cross bar, 13-montant, 14 numbered cards; The 15-industrial computer, the 16-printer, A-moves axially direction, the forward and reverse revolution of B-.
Fig. 5 changes the experimental result of a cutter spacing for knife rest; Wherein, the horizontal ordinate t-time, ordinate ω-cutterhead is at each rotational angular velocity constantly; The angular velocity velocity perturbation maximum magnitude that a-allows; The angular velocity velocity perturbation minimum zone that b-allows, c1-changes the actual knife rest dividing movement dynamic characteristic that records of first cutter spacing, and c2-changes second actual knife rest dividing movement dynamic characteristic that records of cutter spacing.
Embodiment
Specify embodiment of the present invention in conjunction with accompanying drawing and technical scheme: angular encoder selects for use German HEIDENHAIN RON785 not have the built-in bearing scrambler in the present embodiment, cooperates complete IK220 universal PC numbered card, can realize high measuring accuracy.Scrambler is of a size of Ф 48 * 27mm, and it is that the DTS-63. cutterhead key dimension of Dalian high golden number control group is that cutterhead is selected model for use: Ф 312 * 51mm, have 8 cutter spacing, and 8 cutters can be installed.The industrial computer that adopts is for grinding magnificent industrial computer IPC-610CPU2.4G, internal memory 512M, hard disk 80G 17 ' liquid crystal (4: 3) 2 * RS232,2 * USB, 1 * EPP, 1 * RJ45.
Knife rest dividing movement dynamic characteristic measuring device is a sensing element with scrambler 7, gathers the variation in angular displacement amount of cutterhead, and the variation in angular displacement amount is converted into electric signal output.The ultimate principle of this measurement mechanism foundation is: scrambler 7 is converted into electric signal with the variation in angular displacement amount that records; Numbered card 14 receives these electric signal; And send to industrial computer 15; Industrial computer 15 goes out cutterhead each angular velocity constantly in the course of the work according to these calculated signals, through analyzing vibration and the twisting situation that angular velocity varies draws knife rest.And the indexing accuracy of knife rest can obtain from the variation in angular displacement amount that scrambler records intuitively.Testing procedure is following:
(1) installation of proving installation
Can adopt two types knife rest casing: a kind of is the knife rest casing that oil motor, speed change gear, hydraulic jack are housed, and another kind is the knife rest casing that servomotor, speed change gear are housed.
The installation process of measuring table: what present embodiment adopted is that the knife rest casing 11 that oil motor, speed change gear, hydraulic jack are housed is installed on the measuring table; Tested cutterhead 10 is contained on the central shaft of knife rest casing 11, and rotating shaft 9 is contained in the center pit of tested cutterhead 10, is contained in the inner ring of scrambler 7 in the rotating shaft 9; The outer ring of scrambler 7 is fixed on the L bracket plate 5 through arcuate bombing leaf 8 with two screws 6; The shape of cross section of L bracket plate 5 is a flute profile, and two apertures 3 are arranged on plane on the L bracket plate 5, and little axle 2 is housed respectively in two apertures 3; On two little axles 2, be separately installed with bearing 4; These two bearings can make the axially motion flexibly at cutterhead of L bracket plate 5 and scrambler 7, and magnetic force gauge stand 1 is installed in knife rest casing 11 upper ends, and the cross bar 12 of magnetic force gauge stand 1 is clipped in two bearings 4 on plane on the L bracket plate 5; Limit the outer ring rotation of scrambler 7 through the rotation of restriction L bracket plate 5; The cross bar 12 of regulating magnetic force gauge stand 1 on montant 13 height and with the angle on cutterhead 10 surfaces, make it and cutterhead 10 Surface Vertical, link to each other numbered card 14 with scrambler 7; Couple together industrial computer 15 and numbered card 14 at last, be connected printer 16 on the industrial computer 15.
(2) setting of Survey Software
Because this method of testing can be measured the knife rest of various models, its required precision of different knife rests is different, therefore before the knife rest test to a certain model; Will set the Measurement Resolution of testing software earlier, resolution is meant that numbered card reads interlude between two data, and interlude is short; Measuring accuracy is just high; Interval time is long, and precision is just low, can set different resolution according to condition of different like this; What this measurement was selected is hydraulically powered tool holder system, and the various precision of hydraulically powered tool holder system are all than higher, and therefore the resolution when carrying out data acquisition is high, and the resolution that this measurement is adopted is 1ms.
(3) measurement and result's evaluation
In the time of operate as normal, drive the cutter rotation in order to prevent cutterhead, cutterhead is locked on the knife rest through two-piece type fluted disc mechanism.The two-piece type fluted disc mechanism that present embodiment adopts is installed in the knife rest casing 11; Two-piece type fluted disc mechanism is in tool changing, and the drive unit inner by knife rest drives, and tooth is unclamped, taken off in fluted disc mechanism; Open locking state and carry out tool changing, cutterhead 10 just can move axially moving of direction A.Because moving axially of cutterhead 10 also axially moves the scrambler 7 and the L bracket plate 5 that are installed on the cutterhead 10.Move axially sensitivity in order to make; Being connected of the cross bar 12 of L bracket plate 5 and magnetic force gauge stand 1 must be movable; L bracket plate 5 is connected with the cross bar 12 of magnetic force gauge stand 1 through two little bearings 4 on last plane; These two bearings can make the axially motion flexibly at cutterhead 10 of supporting plate 5 and scrambler 7, and move the outer ring that drives scrambler 7 simultaneously.
Fig. 4 is the axonometric drawing of measurement mechanism, during measurement, is contained in the magnetic force gauge stand 1 of measurement mechanism on the knife rest casing 11; Cutterhead 10 carries out forward and reverse revolution B by the drive device drives in the knife rest casing.The inner ring of scrambler 7 is through rotating shaft 9 driven rotary, and the outer ring of scrambler 7 then is fixed on the L bracket plate 5 motionless through arcuate bombing leaf 8, and perforate on L bracket plate 5 is to alleviate the weight of L bracket plate 5.The shape of cross section of L bracket plate 5 is a flute profile, can improve the rigidity of supporting plate like this.Relative motion between the inside and outside circle is exactly the angular displacement of cutterhead; Scrambler 7 is converted into electric signal with angular displacement, transforms the electric signal of coming out by numbered card 14 received code devices 7, and sends to industrial computer 15; Analyze through industrial computer 15; Printer 16 prints the relation curve of time and cutterhead rotational angular velocity, measures first cutter spacing on the cutterhead 10 earlier, and scrambler (7) sends to industrial computer (15) to the data that record through numbered card (14); Industrial computer (15) is drawn out the relation curve between time and the cutterhead rotational angular velocity, is printed by printer (16); Carry out tool changing then, measure second cutter spacing again, send to industrial computer (15) to the data that record through numbered card (14), industrial computer (15) is drawn out the relation curve between time and the cutterhead rotational angular velocity, is printed by printer (16), and is as shown in Figure 5.In actual measurement, during the knife rest tool changing,, make exchanging knives process speed inhomogeneous because various mismachining tolerances and rigging error can cause the vibration of knife rest and the twisting of cutterhead.Whether a knife rest is qualified, and whether that will see it has exceeded the scope that allows in each speed constantly.The present invention's tool fixing frame acceptability limit of getting the bid is a zone that has two curves to define, and in these two a, the b curve, allows the highest speed that reaches, the minimum tool-changing speed that the b curve representation allows during the tool changing of a curve representation.Zone between these two curves is exactly the qualified district of product.Tool-changing speed is low can to have a strong impact on work efficiency; Speed is too high, and inertia is just big, and the vibrations of knife rest in exchanging knives process, vibration etc. will be more violent, and top speed will be activated the restriction of motor-driven ability.Comprehensive experimental result repeatedly adds master worker's working experience, finds to be in optimal state when each item dynamic perfromance of rate curve knife rest dividing movement during for the correction sinusoidal curve.
(4) analyze experimental result
Have 8 cutters on the cutterhead of using in the present embodiment, whenever change a cutter, cutterhead will rotate 45 °, and Fig. 5 has write down the curve of double exchanging knives process intermediate slide dividing movement dynamic perfromance.The actual knife rest dividing movement dynamic characteristic that records when the c1 curve is first cutter spacing tool changing, the actual knife rest dividing movement dynamic characteristic that records when the c2 curve is second cutter spacing tool changing.For the first time 0.3 second tool changing time spent, the second time, tool changing was 0.4 second sometimes, and there is 0.1 second pause the centre.Twice tool change time is inconsistent; Main cause is because tool weight differs; Generation is laid particular stress on and is made the affected result of tool-changing speed, and speed can be a little hurry up when cutterhead drive cutter down moves, and processing and rigging error also are to cause inconsistent reason of the time of changing to.From whole figure, the whole piece curve is very near the correction sinusoidal curve, but decline rate is than left side piece on the right of the curve, and the angular velocity of cutterhead descends fast, and this is because the braking time of the raising speed time ratio clamping device of drive unit will be grown.In the curve map; When cutterhead did not also rotate at the beginning, front end had a little fluctuation because of the vibrations generation, and it is will to throw off from locking state earlier because of cutterhead cutterhead before tool changing that this point fluctuates; Just can carry out the action of back then, cutterhead has slight vibrations when throwing off.At the top of curve, the cutterhead rotational speed is the fastest, and this time, the fluctuation of curve was the most violent.After tool changing finishes; Because positioning error, cutterhead have perhaps surpassed the position that requires, perhaps not to the position that requires; Will be backward in locking or violent forward play, it is exactly the decline of curve c1, c2 that the twisting of cutterhead when locking is reflected on the curve map.
Cutterhead dividing movement dynamic characteristic measuring device of the present invention has simple in structure, highly sensitive, and visual result is measured characteristics such as accurate, has actual application value.

Claims (2)

1. measurement knife rest dividing movement method of dynamic; It is characterized in that; Adopt scrambler (7), universal PC numbered card (14) and industrial computer (15) to measure in the method, obtain each magnitude of angular velocity constantly in the knife rest exchanging knives process, and magnitude of angular velocity is converted into electric signal by scrambler (7); Send to industrial computer (15) by numbered card (14); Industrial computer (15) is depicted as the angular velocity varies curve of cutterhead through Survey Software with these data, and industrial computer (15) goes out cutterhead each angular velocity constantly in the course of the work according to these calculated signals, through analyzing vibration and the twisting situation that angular velocity varies draws knife rest; And the indexing accuracy of knife rest can obtain from the variation in angular displacement amount that scrambler records intuitively; The concrete steps of method are following:
(1) on measuring table, installs and measures device
The knife rest casing (11) that will have drive unit, speed change gear earlier is installed on the measuring table, is contained in magnetic force gauge stand (1) on the knife rest casing; On cutterhead (10), load onto rotating shaft (9); Inner ring with scrambler (7) is contained in the rotating shaft (9) again, on the cross bar of magnetic force gauge stand (1), loads onto L bracket plate (5), is fixed together with screw (6) outer ring of the scrambler that installs (7) and L bracket plate (5) through arcuate bombing leaf (8); The outer ring of scrambler 7 can not be rotated with cutterhead (10); Regulate magnetic force gauge stand (1) cross bar (12) height and with the angle on cutterhead (10) surface, make it and cutterhead (10) Surface Vertical, link to each other numbered card (14) with scrambler (7); Couple together industrial computer (15) and numbered card (14) at last, be connected (15) on the industrial computer to printer (16);
(2) resolution of setting testing software, resolution is meant that numbered card reads interlude between two data, and interlude is short, and measuring accuracy is just high, and interval time is long, and precision is just low;
(3) measure
Define the knife rest acceptability limit earlier; Define with two curves; Article one, in curve (a) expression tool changing time, allow the highest speed that reaches, the minimum tool-changing speed of another curve (b) expression permission, and the zone between these two curves is exactly the qualified district of product; When rate curve is that each item dynamic perfromance of knife rest dividing movement is in optimal state when revising sinusoidal curve; Measure first cutter spacing on the cutterhead 10 earlier, scrambler (7) sends to industrial computer (15) to the data that record through numbered card (14), and industrial computer (15) is drawn out the relation curve between time and the cutterhead rotational angular velocity, is printed by printer (16); Carry out tool changing then, measure second cutter spacing again, send to industrial computer (15) to the data that record through numbered card (14), industrial computer (15) is drawn out the relation curve between time and the cutterhead rotational angular velocity, is printed by printer (16); Cutterhead 10 moves axially the mobile of direction A just can carry out tool changing, and cutterhead is locked on the knife rest through detent mechanism before tool changing, and the cutterhead detent mechanism is to adopt the two-piece type fluted disc mechanism that is contained in the knife rest casing; Two-piece type fluted disc mechanism is in tool changing, and the drive unit inner by knife rest drives, and tooth is unclamped, taken off in two-piece type fluted disc mechanism, opens locking state and carry out tool changing.
2. a kind of device that knife rest dividing movement dynamic perfromance method is adopted of measuring as claimed in claim 1; It is characterized in that; Employing has the knife rest casing of drive unit, speed change gear; The knife rest casing has two types: a kind of is the knife rest casing that oil motor, speed change gear, hydraulic jack are housed, and another kind is the knife rest casing that servomotor, speed change gear are housed; The cutterhead detent mechanism is to adopt the two-piece type fluted disc structure that is contained in the knife rest casing, and cutterhead is locked on the knife rest through two-piece type fluted disc mechanism; Tested cutterhead (10) is contained on the central shaft of the knife rest casing (11) that has drive unit, speed change gear; On cutterhead (10), load onto the inner ring of scrambler (7); Rotating shaft 9 is contained on the center pit of cutterhead 10, and the inner ring of scrambler (7) is contained in the rotating shaft (9), and the outer ring of scrambler (7) is fixed on the L bracket plate (5) through arcuate bombing leaf (8) with two screws (6); The shape of cross section of L bracket plate (5) is a flute profile; Two apertures (3) are arranged on the last plane of L bracket plate (5), little axle (2) is housed respectively in two apertures (3), on two little axles (2), be separately installed with bearing (4); Magnetic force gauge stand (1) is installed in knife rest casing (11) upper end; Montant (13) is contained on the magnetic force gauge stand (1), and cross bar (12) is clamped on the montant (13), and L bracket plate (5) is clamped on the cross bar (12) of magnetic force gauge stand 1 through the bearing (4) on last plane; The rotation of restriction scrambler (7) outer ring; Scrambler (7) links to each other with numbered card (14), and numbered card (14) is connected with industrial computer (15), and printer (16) is connected on the industrial computer (15).
CN2010105020145A 2010-09-29 2010-09-29 Method and device for measuring dynamic characteristics of indexing motion of tool holder Expired - Fee Related CN101982749B (en)

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CN107931635A (en) * 2017-11-02 2018-04-20 中核(天津)机械有限公司 A kind of apparatus and method for the main shaft tail top concentricity for being used to detect double tool rest lathe
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