CN1532519A - Method and device for measuring inner diameter size of work piece - Google Patents
Method and device for measuring inner diameter size of work piece Download PDFInfo
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- CN1532519A CN1532519A CNA2004100301772A CN200410030177A CN1532519A CN 1532519 A CN1532519 A CN 1532519A CN A2004100301772 A CNA2004100301772 A CN A2004100301772A CN 200410030177 A CN200410030177 A CN 200410030177A CN 1532519 A CN1532519 A CN 1532519A
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Abstract
Provided is a workpiece bore size measuring method and its instrument for rapidly, simply, and accurately measuring the bore size of a workpiece by a simple structure. According to this workpiece bore size measuring method, the bore size of the workpiece is measured by supplying compressed air from an air supply means to an inner circumferential part of the cylindrical workpiece to detect its back pressure. First and second workpieces are severally connected to the supply means. The supply of compressed air to the first workpiece is shut off while compressed air is supplied to the second workpiece. With the supply of compressed air to the first workpiece is shut off, the supply of compressed air to the second workpiece is shut off. A prescribed time period after the supply of compressed air to the second work is shut off with the supply of compressed air to the second workpiece cut off, the supply of compressed air to the first workpiece is started. A prescribed time period after the supply of compressed air to the first workpiece is started, the back pressure of the compressed air is detected. The bore size of the first workpiece is acquired from the detection result.
Description
Technical field
The present invention relates to a kind of inner diameter of workpiece dimension measurement method and device, particularly relate to a kind of inner diameter of workpiece dimension measurement method and device of internal diameter size of suitable measurement ferrule small cylindrical workpieces such as (ferrule).
Background technology
In the prior art, during the internal diameter size of small cylindrical workpieces such as measurement ferrule, the gauger measures the interior perimembranous of the pig gauge insertion workpiece of certain size.In addition, when measuring automatically, workpiece is positioned on V platform etc., the contact pilotage of instrument with contacts is abutted to its inside diameter and makes Workpiece Rotating, try to achieve the inner diameter of workpiece size according to the displacement of contact pilotage at this moment.Perhaps, the end face that is positioned in the workpiece on V platform etc. is made a video recording with CCD camera, try to achieve inner diameter of workpiece by Flame Image Process according to the view data that obtains.(for example, with reference to patent documentation 1～3)
But when using pig gauge to measure, the gauger must measure by handwork piecemeal, and the shortcoming that needs a lot of labours is arranged.In addition, owing to be manual operations, lack the shortcoming of accuracy in addition.And, because be the mode that pig gauge (pin guage) is inserted and measures, measure pig gauge generation wearing and tearing when carrying out, have the shortcoming that can not accurately measure.
Use in the measurement of instrument with contacts, owing to contact pilotage must be inserted inner diameter of workpiece portion, measurable internal diameter has certain limitation, has the shortcoming of the measurement that can not carry out the less workpiece of ferrule uniform internal diameter.On the other hand, in the measurement that the use Flame Image Process is carried out, has the only shortcoming of energy measurement end face internal diameter.
In order to solve these various shortcomings, proposed to supply with pressurized air to the interior perimembranous of cylindrical workpiece from the air feed mechanism, come the method for the internal diameter size of measuring workpieces by detecting its back pressure.
Fig. 7 is the synoptic diagram of the measuring principle of this workpiece diameter size of expression.Enter air governor 106 from air source 102 compressed and supplied air through air strainer 104, be adjusted to after certain air pressure, the pipe arrangement 108,110 that is branched off into 2 systems is fed into the both sides of A/E converter (pneumatic-to-current converter) 120 (A side and B side).And, in the pipeline of each pipe arrangement 108,110, be provided with respectively and measure multiplying power adjusting restriction device 112,114, can regulate the air mass flow in the pipe arrangement 108,110.
The pipe arrangement 122 of the A side of A/E converter 120 is used in the workpiece calibration, and the pipe arrangement 124 of the B side of A/E converter 120 is regulated restriction device 126 through zero crossing and is opened in the atmosphere.Pneumatic-to-current converter 120 is converted to electric signal with the pressure differential of this A wall pressure and B wall pressure.
The pipe arrangement 122 of the A side of A/E converter 120 is connected to workpiece calibration platform 130 through the solenoid valve 128 that is used for open and close control.
As shown in Figure 7, workpiece calibration platform 130 is by constituting by pressure ring 134 etc. of being formed by test desk body 132 and elastic body.Workpiece calibration platform 130 vertically is provided with, and is formed with air feed path 136 in the central.Formation circular depressions on test desk body 132 is utilized on this recess and is pressed pressure ring 134 fixation workpiece W.
The measurement of the internal diameter size of workpiece W is carried out in the following order.At first, workpiece W is fixed on the test desk 130 of as above structure, solenoid valve 128 is switched to closed condition.Then, in pipe arrangement 122, supply with the pressurized air of certain pressure.
Then, solenoid valve is switched to open mode, in air feed path 136, supply with pressurized air.The pressurized air that is fed in the air feed path 136 passes through to spray by the interior perimembranous of the workpiece W of workpiece calibration platform 130 maintenances and to the outside.A/E converter 120 will be converted to electric signal through the compressed-air actuated back pressure behind the certain hour by built-in corrugated tube and differential transformer, and the output electric signal.Then, calculate the internal diameter size of workpiece W based on this electric signal.
Patent documentation 1: Japanese kokai publication hei 8-29642 communique; Patent documentation 2: Japanese kokai publication hei 10-227619 communique; Patent documentation 3: Japanese kokai publication hei 6-174433 communique.
But, in the described prior art, thereby though in workpiece perimembranous supply with pressurized air and detect back pressure and measure the method for internal diameter size and have various advantages,, the long shortcoming of Measuring Time is arranged.Fig. 8 is the curve map of expression by the pressurized air back pressure effluxion variation of A/E converter 120 measurements.The transverse axis of this figure is a time shaft, and the longitudinal axis is compressed-air actuated back pressure.In addition, below curve map, show the effluxion variation of the open and close state of solenoid valve 128.
In Fig. 7 and Fig. 8, solenoid valve 128 is in closed condition during beginning, and the setting that applies air governor 106 on the pneumatic-to-current converter 120 is pressed.Then, when solenoid valve 128 was switched to open mode, air feed path 136 was opened in the atmosphere, and thus, the air pressure that is applied on the A/E converter 120 reduces at first rapidly.Then, reduce gradually after this, drop to roughly certain value through behind the certain hour.Then, calculate the internal diameter size of workpiece W according to the barometer of this state.
After measurement is finished,, thus, be applied to the setting that air pressure on the pneumatic-to-current converter 120 returns to air pressure regulator valve 106 rapidly and press by solenoid valve 128 is switched to closed condition.Then, under this state, carry out the exchange of workpiece W, thus, can carry out the measurement of next workpiece W.
More than in Shuo Ming the existing measuring method, the time of reducing to certain value to air pressure is very long.For example, workpiece W as shown in Figure 9.To being that 2.5mm, internal diameter size d are the internal diameter size d of ferrule of the design size manufacturing of 0.125mm when measuring with the outer diameter D, need about about 17 seconds.Thereby, have the problem of the measurement that is not suitable for carrying out a plurality of workpiece W.
Summary of the invention
In view of this problem, the purpose of this invention is to provide a kind of simple in structure and can be rapid, easy and the internal diameter size measuring method and the device of internal diameter size measuring workpieces exactly.
For reaching above-mentioned purpose, the invention provides a kind of internal diameter size measuring method and be used for the device of this method, utilize the air feed mechanism to supply with pressurized air to the interior perimembranous of cylindrical workpiece, come the internal diameter size of measuring workpieces by detecting its back pressure, it is characterized in that, on the air feed mechanism, connect the 1st workpiece and the 2nd workpiece respectively, cut off to described the 1st Workpiece supply pressurized air, and to described the 2nd Workpiece supply pressurized air; Cutting off under the compressed-air actuated state of described the 1st Workpiece supply, cutting off to described the 2nd Workpiece supply pressurized air; Begin through behind the certain hour from cutting off to described the 2nd Workpiece supply pressurized air, cutting off under the compressed-air actuated state of described the 2nd Workpiece supply, beginning is to described the 1st Workpiece supply pressurized air; , behind described the 1st Workpiece supply pressurized air process certain hour, detect compressed-air actuated back pressure, and obtain described the 1st inner diameter of workpiece size from beginning according to this testing result.
According to the present invention, use 2 workpiece, at first, cut off to the 1st Workpiece supply pressurized air, and to the 2nd Workpiece supply pressurized air.Then, cutting off under the compressed-air actuated state of the 1st Workpiece supply, also cut off to the 2nd Workpiece supply pressurized air.Thus, compressed-air actuated back pressure rises rapidly.Then, after small time delay, cutting off under the compressed-air actuated state of the 2nd Workpiece supply, beginning is to described the 1st Workpiece supply pressurized air.Like this, compare, under this state, reduce to the required time of certain value up to air pressure and become very short with conventional example.Thereby, can detect compressed-air actuated back pressure at short notice, and obtain the inner diameter of workpiece size.
Among the present invention, supply with pressurized air, and change the internal diameter size of measuring workpieces by detecting its back pressure to the interior perimembranous of workpiece.According to the present invention, do not need to make Workpiece Rotating, therefore can measure at short notice.In addition, because can not produce wearing and tearing, even long-time use also can accurately stably be measured all the time.In addition, do not need to make the mechanism of Workpiece Rotating, therefore, can constitute small-sized device.
In addition, the invention provides a kind of inner diameter of workpiece dimension measurement method, utilize the air feed mechanism to supply with pressurized air to the interior perimembranous of cylindrical workpiece, come the internal diameter size of measuring workpieces by detecting its back pressure, it is characterized in that, on the air feed mechanism, connect measuring object workpiece and the internal diameter size simulation workpiece littler respectively, cut off to described measuring object Workpiece supply pressurized air than this measuring object workpiece, and to described simulation Workpiece supply pressurized air; Beginning is to measuring object Workpiece supply pressurized air, and cut-out is to described simulation Workpiece supply pressurized air; Begin to detect compressed-air actuated back pressure, and obtain described measuring object inner diameter of workpiece size from cutting off according to this testing result through behind the certain hour to described simulation Workpiece supply pressurized air.
According to the present invention, use 2 workpiece, at first, cut off to measuring object Workpiece supply pressurized air, and to simulation Workpiece supply pressurized air.Like this, because, under this state, compressed-air actuated back pressure can be maintained low state by simulation workpiece leakage air.But this back pressure is the back pressure height during allocating and measuring object workpiece than replacing simulation workpiece.Under this state, beginning is to measuring object Workpiece supply pressurized air, and cut-out is to simulation Workpiece supply pressurized air.Like this, compare with prior art, under this state, it is very short to reduce to the required time of certain value up to air pressure.Thereby, can detect compressed-air actuated back pressure in the short time at the utmost point, and obtain the inner diameter of workpiece size.
In the present invention, described inner diameter of workpiece size 0.05mm～1mm preferably.Do not measure because do not need equally contact pilotage to be inserted workpiece diameter portion to prior art, very effective when measuring internal diameter size and be the minimum inner diameter of workpiece size of the internal diameter of 0.05mm～1mm, and can bring into play advantageous effects of the present invention.
And in the present invention, so-called workpiece comprises the check gauge of measuring object workpiece and known internal diameter size.
The present invention is effective especially to the measurement of the little workpiece of internal diameter size, still, uses effective too as at present normally used substitute with micrometer of ozzle.That is, in having the micrometer of ozzle, when the minor diameter about high-acruracy survey 0.3mm (not external diameter of pipe or internal diameter) was measured thing, its response performance was poor.To this,, can improve response performance by identical circuit structure according to the present invention.
Description of drawings
Fig. 1 is the integrally-built synoptic diagram of expression internal diameter size measurement mechanism of the present invention;
Fig. 2 is the longitudinal section of the structure of expression test desk;
Fig. 3 is the synoptic diagram of major part structure of the internal diameter size measurement mechanism of expression embodiment;
Fig. 4 is illustrated in the curve map that pressurized air back pressure effluxion changes in the structure of Fig. 3;
Fig. 5 is the synoptic diagram of major part structure of the internal diameter size measurement mechanism of other embodiment of expression;
Fig. 6 is illustrated in the curve map that pressurized air back pressure effluxion changes in the structure of Fig. 5;
Fig. 7 is the synoptic diagram of inner diameter of workpiece dimensional measurement principle in the expression prior art;
Fig. 8 is illustrated in the curve map that pressurized air back pressure effluxion changes in the structure of Fig. 7;
Fig. 9 is the side sectional view of expression Workpiece structure.
Embodiment
Below, describe with reference to the embodiment of accompanying drawing with regard to inner diameter of workpiece dimension measurement method of the present invention and device.
Fig. 1 is the integrally-built synoptic diagram of expression internal diameter size measurement mechanism of the present invention.As shown in the drawing, the internal diameter size measurement mechanism is made of measurement section 10, supply unit 12, recoverer 14, check gauge resettlement section 16, trucking department 18 and control part 70, the internal diameter size of small cylindrical workpieces such as measurement ferrule.
As Fig. 2 (a) and (b), test desk 20 by test desk body 24, press pressure ring 26, supporting ring 28 and pressing mechanism (not shown) formation.
Press pressure ring 26 and form the workpiece patchhole 36 bigger a little than diameter of work along its axis.Should be embedded into and be supported in the recess 32 that the test desk body forms above by pressure ring 26, and be free to slide vertically in recess 32 as guiding face with the inner peripheral surface of this recess 32.In addition, the conical press surface 38 that formation is tilted to central authorities below this presses pressure ring 26, butt supporting ring 28 on it.
Supporting ring 28 is formed by elastic body, and is housed in the recess that forms above 32 of test desk body 24.This supporting ring 28 is set to workpiece receiving hole 34 coaxial, and the press surface 38 of the ring 26 that is pressed is pushed, and thus, thereby be crushed its internal diameter is shunk.And, the internal diameter of employed supporting ring 28 under common state (no load condition) liken to into the external diameter of the workpiece W of measuring object big.Thereby, when workpiece W is inserted through supporting ring 28, be in roughly non-contacting state.
Not shown pressing mechanism for example is made of cylinder, will push to test desk body 24 by pressure ring 26.
The as above test desk 20 of Gou Chenging, shown in Fig. 2 (a), when the workpiece patchhole 36 of pressing pressure ring 26 inserted workpiece W, the fore-end of this workpiece W inserted in the workpiece receiving hole 34 that forms on the test desk body 24.Under this state, shown in Fig. 2 (b), by pressure ring 26 by not shown pressing mechanism when test desk body 24 is pushed, supporting ring 28 is crushed on the press surface 38 by pressure ring 26, its internal diameter dwindles.As a result, the peripheral part of workpiece W is fastening by supporting ring 28, thereby workpiece W is maintained on the test desk 20.In addition, supporting ring 28 clings on the periphery of workpiece W, and is therefore, sealed between workpiece W and the workpiece receiving hole 34.
And, when workpiece W is taken out, remove the pushing that pressing mechanism causes by pressure ring 26.Thus, be returned to original position by the elastic-restoring force of pressure ring 26 by supporting ring 28, and supporting ring 28 itself also reverts back to original diameter by its elastic-restoring force.Thus, the fastening of workpiece W is disengaged, can takes out.
As shown in Figure 1, air micrometer 22 is made of air source 40, pressure regulator valve 42, A/E converter 44 and control portion 46.
Be adjusted to certain pressurized air from air source 40 supplying temperatures, humidity.Pressure regulator valve 42 will be from these air source 40 compressed and supplied artificial atmospheres to certain pressure.Afterwards, the pressurized air that is adjusted to certain pressure by this pressure regulator valve 42 supplies to the air feed path 30 of test desk body 24 with solenoid valve 45 (perhaps 47) by A/E converter 44 and open and close control.
The pressurized air that is fed into air feed path 30 sprays to the outside by the interior perimembranous that is maintained at the workpiece W on the test desk 20.A/E converter 44 is converted to electric signal by built-in corrugated tube and differential transformer with compressed-air actuated back pressure at this moment, and outputs to control portion 46.Then, control portion 46 calculates the internal diameter size of workpiece W based on this electric signal.Be displayed among the display 46A that control portion 46 possesses by the internal diameter size that calculated, and be recorded to the storer (not shown) that control portion 46 possesses as data.
Supply unit 12 carries out the supply of measuring object workpiece W.This supply unit 12 has the supply platform 48 of accommodating a plurality of measuring object workpiece W.Supply with platform 48 and constitute, accommodate a measuring object workpiece W in each hole by the plate that for example forms a plurality of holes in the above at certain intervals.
Recoverer 14 reclaims the workpiece W that finishes measurement.This recoverer 14 has qualified recovery platform 50A that accommodates qualified workpiece (workpiece that meets preassigned) and the defective recovery platform 50B that accommodates defective workpiece (not meeting the workpiece of preassigned).It is identical with supply platform 48 that each reclaims platform 50A, 50B, is made of the plate that for example forms a plurality of holes in the above at certain intervals, accommodates a workpiece W who finishes measurement in each hole.
Accommodate the check gauge M that the zero correction that is used for air micrometer 22 and multiplying power are proofreaied and correct in the check gauge resettlement section 16.This check gauge resettlement section 16 has the check gauge of accommodating check gauge M and accommodates platform 52.Check gauge accommodates platform 52 and to supply with platform 48 identical, is made of the plate that for example forms a plurality of holes in the above at certain intervals, accommodates a check gauge in each hole.
Trucking department 18 is transported to measurement section 10 with measuring object workpiece W from supply unit 12, and, the workpiece W that finishes measurement is transported to recoverer 14 from measurement section 10.In addition, check gauge M is transported to measurement section 10 from check gauge resettlement section 16, and, the check gauge M that finishes correction is transported to check gauge resettlement section 16.This trucking department 18 has transfer robot 54.Transfer robot 54 by the moving body 58 that moves along the guide rail 56 that is arranged on the ceiling frame (not shown), be located on this moving body 58 and the mechanical arm 60 that can freely stretch, be arranged on mechanical arm 62 formations that these mechanical arm 60 front ends also can free switch.Workpiece W is by these mechanical arm 62 clampings and be handled upside down.
Control part 70 constitutes each device of internal diameter size measurement mechanism according to predefined working routine control.Has touch panel (not shown) on this control part 70 as the input mechanism of various information.
Then, detailed structure and the effect with regard to air micrometer 22 grades of present embodiment describes.Fig. 3 is the synoptic diagram of the major part structure of expression internal diameter size measurement mechanism, and Fig. 4 is illustrated in the curve map that pressurized air back pressure effluxion changes in the structure of Fig. 3.The transverse axis of this figure is a time shaft, and the longitudinal axis is represented compressed-air actuated back pressure.In addition, below curve, the effluxion that shows the open and close state of solenoid valve 45 and 47 changes.And, in Fig. 3,, omit its explanation with identical, the similar member mark of conventional example same tag shown in Figure 7.
In Fig. 3, the pipe arrangement 122 of the A side of A/E converter 44 is branched to 2 systems, is connected on the test desk 20 via solenoid valve 45,47 respectively. Solenoid valve 45 and 47 is 2 position transfer valves of 1 port, is switched by the open and close that the control of control part 70 is carried out separately.
In Fig. 3, measuring object workpiece W (the 1st workpiece) is installed on the test desk 20 up, below test desk 20 on check gauge M (the 2nd workpiece) is installed.
At first, close solenoid valve 45 and cut off compressed and supplied air, and open solenoid valve 47, supply with pressurized air (step 1) to check gauge M (the 2nd workpiece) to measuring object workpiece W (the 1st workpiece).Thus, compressed-air actuated back pressure (A side) value becomes the S1 value of forcing down than the setting of air vent valve 42 (with reference to Fig. 4).
Then, cutting off under the compressed-air actuated condition of supplying of the 1st workpiece W, closing solenoid valve 47 and cut off compressed-air actuated supply (step 2) to check gauge M (the 2nd workpiece).Thus, compressed-air actuated back pressure (A side) begins to rise.
By having begun of this step 2, under the compressed-air actuated condition of supplying of check gauge M (the 2nd workpiece), open the compressed-air actuated supply (step 3) of solenoid valve 45 beginnings to measuring object workpiece W (the 1st workpiece) in cut-out through behind the certain hour t.Thus, compressed-air actuated back pressure (A side) begins to descend, and drops to certain value thereafter at short notice.
Thereby, begin to detect compressed-air actuated back pressure from step 3 through after the certain time interval T, obtain the internal diameter size (step 4) of measuring object workpiece W (the 1st workpiece) via control portion 46 by this testing result (electric signal).
Compare with above-mentioned existing example shown in Figure 7, can record identical workpiece W, that is, shown in Figure 9 is that 2.5mm, inner diameter d are the internal diameter size d of 0.125mm as the ferrule of design size manufacturing with the outer diameter D.In this case, when the schedule time t with step 2 was made as 0.5 second, T needed about about 3.5 seconds.Its result shortens to about 1/5 of existing mode.
In Fig. 4, after step 4, cutting off under the compressed-air actuated condition of supplying of check gauge M (the 2nd workpiece), close solenoid valve 45 and cut off to compressed-air actuated supply (step 5) as the workpiece W (the 1st workpiece) of measuring object.Thus, compressed-air actuated back pressure (A side) begins to rise.
Then, begin cutting off under the compressed-air actuated condition of supplying of measuring object workpiece W (the 1st workpiece), open solenoid valve 47 and begin to supply with pressurized air (step 6) to check gauge (the 2nd workpiece) through behind the certain hour u from this step 5.Thus, compressed-air actuated back pressure (A side) begins to descend, and drops to certain value thereafter in short time U.
Then, cutting off under the compressed-air actuated condition of supplying of the 1st workpiece W, closing solenoid valve 47 and cut off compressed-air actuated supply (step 7) to check gauge M (the 2nd workpiece).Thus, compressed-air actuated back pressure (A side) begins to rise.
Between above-mentioned steps 5～step 7, also can measure the internal diameter size d of check gauge M (the 2nd workpiece).That is, in step 5～step 7, under the state of replacing measuring object workpiece W (the 1st workpiece) and check gauge M (the 2nd workpiece), carry out identical operations with step 1～step 4.
Between above-mentioned steps 5～step 7, measuring object workpiece W (the 1st workpiece) is exchanged mutually with the workpiece W that then measures.Like this, after step 7, that is, begin carry out step 1 once more～the measurement operation of step 4 through after the certain hour U from step 7.
And according to Fig. 4, the measurement of measuring object workpiece W and the measurement of check gauge M hocket, and still, are considering under the situation of throughput rate, also can reduce the survey frequency of this check gauge M.
For example, adopt when measuring beginning and carry out the measurement of check gauge M, thereafter, every through measuring the method for check gauge behind the certain hour.Measuring check gauge M when measuring beginning is in order to confirm the precision of air micrometer 22, measure check gauge M behind every process certain hour to be not have because the variation (temperature, humidity etc.) of environment causes the precision of air micrometer 22 to change in order to confirm to have.By this operation mode, than existing, can significantly boost productivity.
Then, detailed structure and the effect to air micrometer 22 grades of other embodiment describes.Fig. 5 is the synoptic diagram of major part structure of the internal diameter size measurement mechanism of other embodiment of expression, Fig. 6 (a) and (b) be the curve map that is illustrated in the effluxion variation of pressurized air back pressure (A side) in the structure of Fig. 5.The transverse axis of this figure is a time shaft, and the longitudinal axis is represented compressed-air actuated back pressure.In addition, below curve map, represented the effluxion variation of the open and close state of solenoid valve 49.And, in Fig. 5, with identical, the similar member of existing example shown in Figure 7 on mark same tag, and omit its explanation.
In Fig. 5, the pipe arrangement 122 of the A side of pneumatic-to-current converter 44 is connected on the solenoid valve 49.Solenoid valve 49 is 1 port of input side, and 2 position transfer valves of 2 ports of outgoing side switch by electromagnetism, and the pressurized air of pipe arrangement 122 is assigned to the test desk 20 of top or the test desk 20 of below.This blocked operation is to be undertaken by the control of control part 70.
In Fig. 5, install and measure object workpiece W on the test desk 20 up, simulation workpiece Z is installed on the test desk of below.Fig. 6 (a) is the example under the roughly the same situation of the internal diameter size of the internal diameter size of simulation workpiece Z and measuring object workpiece W, and Fig. 6 (b) is that the internal diameter size of simulation workpiece Z is than the example (method of the present invention) under the little situation of the internal diameter size of measuring object workpiece W.
At first, cut off, and solenoid valve 49 is set carries out compressed-air actuated supply (step 11) to simulation workpiece Z to compressed-air actuated supply as the workpiece W of measuring object.Thus, compressed-air actuated back pressure (A side) value becomes the S2 (Fig. 6 (a)) that forces down than the setting of air vent valve 42 or the value of S3 (Fig. 6 (b)).
Under the situation of more compressed-air actuated back pressure S2 and S3, among Fig. 6 (a), the internal diameter size of simulation workpiece Z and roughly the same as the internal diameter size of the workpiece W of measuring object, therefore, roughly the same value when back pressure S2 becomes with measuring workpieces W, relative therewith, among Fig. 6 (b), the internal diameter size of simulation workpiece Z is littler than the internal diameter size of measuring object workpiece W, and therefore, back pressure S3 is than back pressure S2 height.
Then, beginning is to the compressed-air actuated supply as the workpiece W of measuring object, and solenoid valve 49 is set cuts off compressed-air actuated supply (step 12) to simulation workpiece Z.Thus, in Fig. 6 (a), compressed-air actuated back pressure (A side) once descended rapidly, then slowly near the S2 value.
As mentioned above, compressed-air actuated back pressure once descended rapidly in Fig. 6 (a), be the pipe arrangement that reaches test desk 20 for the air feed path 30 that makes pressurized air be full of test desk 20, compressed-air actuated back pressure moves closer to the S2 value after this, is because the difference of air back pressure that was once descending and S2 value is little.
On the other hand, in Fig. 6 (b), during switching solenoid valve 49, near compressed-air actuated back pressure more promptly drops to S2 from S3, and reduce to certain value.Like this, in Fig. 6 (b), compressed-air actuated back pressure is reduced to certain value quickly, be because S3 than S2 height, and the air that is equivalent to its pressure reduction is full of the air feed path 30 of test desk 20 and in the pipe arrangement of test desk 20.
Then, begin afterwards from step 12 through certain hour V1 (Fig. 6 (a)) or V2 (Fig. 6 (b)), detect compressed-air actuated back pressure, and obtain the internal diameter size (step 13) of measuring object workpiece W according to this testing result (electric signal) via control portion 46.
Compare with the method for Fig. 6 (a), in the inventive method shown in Fig. 6 (b), shortened Measuring Time V2 significantly.
In Fig. 6, after step 13, cut off to measuring object workpiece W compressed and supplied air, and operation solenoid valve 49 is supplied with pressurized air (step 14) to simulation workpiece Z.Thus, compressed-air actuated back pressure (A side) becomes S2 (Fig. 6 (a)) or S3 (Fig. 6 (the b)) value of forcing down than the setting of air vent valve 42.
During step 14, with measuring object workpiece W and the workpiece W that next will measure exchange.Thus, after step 14, carry out step 11 once more～the measurement operation of step 13.
Then, with reference to Fig. 1 etc., the actual flow process that the internal diameter size that just uses the internal diameter size measurement mechanism of the present embodiment of said structure to carry out is measured describes.And, at this, to being that 2.5mm, internal diameter are that the inner diameter d of the ferrule made of 0.125mm is measured with the external diameter, judge whether that based on its result situation about reclaiming respectively after qualified is that example describes.That is,, then be recovered to qualified recovery platform 50A, under the ungratified situation, be recovered to defective recovery platform 50B as defective workpiece as qualified workpiece if the result who measures satisfies predefined standard.
Before measuring workpieces W, carry out the calibration of air micrometer 22.Calibration is carried out signal by input calibration in control part 70 and is carried out.After the calibration of micrometer 22 is finished, beginning measuring workpieces W.
At first, transfer robot 54 is driven, and takes out measuring object workpiece W from supply unit 12.Then, be transported to measurement section 10 by this transfer robot 54.The workpiece W that is moved to measurement section 10 is handed off on the test desk 20 and is maintained on the test desk 20.
At this, the maintenance of this workpiece W is by workpiece W being inserted in the workpiece patchhole 36 by pressure ring 26, and utilizes not shown pressing mechanism to push to test desk body 24 by pressure ring 26 and carry out.Thus, supporting ring 28 ring 26 that is pressed flattens, workpiece W by this be crushed by pressure ring 26 clampings, be maintained on the test desk 20.In addition, meanwhile, sealed between workpiece W and the workpiece receiving hole 34.
When workpiece W is maintained on the test desk 20, drive air source 40, the pressurized air that is adjusted to certain pressure by pressure regulator valve 42 is situated between by A/E converter 44, and is fed into the air feed path 30 of test desk 20 via solenoid valve 45 (perhaps 47,49).Be fed into pressurized air in this air feed path 30 by workpiece W interior perimembranous and be discharged into the outside.And, detect at this moment compressed-air actuated back pressure by A/E converter 44, and output to control portion 46 as electric signal.
Control portion 46 calculates the internal diameter size d of workpiece W according to the electric signal that obtains from A/E converter 44.That is,, go out the internal diameter size d of workpiece W according to the calculation of backpressure that records based on the back pressure characteristic of obtaining in advance.The internal diameter size d that calculates is illustrated on the display monitor central monitoring system 46A that control portion 46 possessed, and, in the storer (not shown) that is had to control portion as data recording.
By above step, finish the measurement of the internal diameter size of 1 workpiece W.When measurement was finished, the driving of air source 40 was stopped by solenoid valve 45 (perhaps 47,49), and removed the maintenance of 20 couples of workpiece W of test desk.That is, remove pressing mechanism (not shown) to by the pushing of pressure ring 26, and remove the fastening of 28 couples of workpiece W of supporting ring, thereby remove the locking of workpiece W.Then, with this freely workpiece utilize transfer robot 54 to take off from test desk, utilize again transfer robot 54 with it to recoverer 14 carryings.
At this, recoverer 14 has the qualified recovery platform 50A that accommodates the qualified workpiece that meets preassigned, and accommodate the defective recovery platform 50B of non-compliant defective workpiece, therefore, corresponding its measurement result of the workpiece W of recovery is recovered to respectively and respectively reclaims among platform 50A, the 50B.That is, in control part 70, judge whether the inner diameter of workpiece size d that is recovered satisfies predefined standard, and under situation about satisfying, be recovered among the qualified recovery platform 50A, under ungratified situation, be recovered among the defective recovery platform 50B.
Finished the measurement operation of 1 workpiece W by above-mentioned a series of operation.Below, by implementing identical operation repeatedly, implement to be housed in all measurements of workpiece W in the supply platform 48 of supply unit 12.
More than, with regard to the embodiment of inner diameter of workpiece dimension measurement method of the present invention and device carry out explanation, still, the present invention is not limited to the foregoing description, can adopt variety of way.For example, in the above-described embodiments, have 2 test desks 20,20 on the measurement section 10, but also can adopt and possess more test desk 20,20......, carry out metering system when on these a plurality of test desks 20,20......, supplying with workpiece W successively.That is, supply with workpiece W successively, and replenish workpiece W when finishing successively each the measurement to these a plurality of test desks 20,20.......Thus, do not need stand-by period of measuring, can make transfer robot 54 high-efficient operation, can measure efficiently.
In addition, in the present embodiment, in recoverer 14, the workpiece of measuring is divided into qualified workpiece and defective workpiece reclaims, still, also can divide into thinner grade and reclaim.
The invention effect
As above illustrated, according to the present invention, use 2 workpiece, at first, cut off to the 1st Workpiece supply pressurized air, and to the 2nd Workpiece supply pressurized air.Then, cutting off under the compressed-air actuated state of the 1st Workpiece supply, also cut off to the 2nd Workpiece supply pressurized air.Thus, compressed-air actuated back pressure rises rapidly.Then, after small time delay, cutting off under the compressed-air actuated state of the 2nd Workpiece supply, beginning is to described the 1st Workpiece supply pressurized air.Like this, compared with prior art, under this state, it is very short that air pressure is reduced to the required time of certain value.Thereby, can detect compressed-air actuated back pressure at short notice, and obtain the inner diameter of workpiece size.
In addition, in the present invention, supply with pressurized air, change, come the internal diameter size of measuring workpieces by detecting its back pressure to the interior perimembranous of workpiece.According to the present invention, measuring workpieces at short notice.In addition, because can not produce wearing and tearing, even long-time use also can be all the time accurately stably to measure.In addition, do not need to make the mechanism of Workpiece Rotating, therefore, can constitute small-sized device.
According to other embodiments of the invention, use 2 workpiece, at first, cut off to measuring object Workpiece supply pressurized air, and to the little simulation Workpiece supply pressurized air of internal diameter size than measuring object workpiece.Like this, because via the blank gas of simulation workpiece, can under this state, compressed-air actuated back pressure be maintained than low state.But this back pressure is the back pressure height during allocating and measuring object workpiece than replacing simulation workpiece.Under this state, beginning is to measuring object Workpiece supply pressurized air, and cut-out is to simulation Workpiece supply pressurized air.Like this, compare with prior art, under this state, it is very short that air pressure is reduced to the required time of certain value.Thereby, can detect compressed-air actuated back pressure at short notice, and obtain the inner diameter of workpiece size.
Claims (5)
1. an inner diameter of workpiece dimension measurement method utilizes the air feed mechanism to supply with pressurized air to the interior perimembranous of cylindrical workpiece, comes the internal diameter size of measuring workpieces by detecting its back pressure, it is characterized in that,
On the air feed mechanism, connect the 1st workpiece and the 2nd workpiece respectively, cut off to described the 1st Workpiece supply pressurized air, and to described the 2nd Workpiece supply pressurized air;
Cutting off under the compressed-air actuated state of described the 1st Workpiece supply, cutting off to described the 2nd Workpiece supply pressurized air;
Begin through behind the certain hour from cutting off to described the 2nd Workpiece supply pressurized air, cutting off under the compressed-air actuated state of described the 2nd Workpiece supply, beginning is to described the 1st Workpiece supply pressurized air;
, behind described the 1st Workpiece supply pressurized air process certain hour, detect compressed-air actuated back pressure, and obtain described the 1st inner diameter of workpiece size from beginning according to this testing result.
2. an inner diameter of workpiece dimension measurement method utilizes the air feed mechanism to supply with pressurized air to the interior perimembranous of cylindrical workpiece, comes the internal diameter size of measuring workpieces by detecting its back pressure, it is characterized in that,
On the air feed mechanism, connect measuring object workpiece and the internal diameter size simulation workpiece littler respectively, cut off to described measuring object Workpiece supply pressurized air than this measuring object workpiece, and to described simulation Workpiece supply pressurized air;
Beginning is to measuring object Workpiece supply pressurized air, and cut-out is to described simulation Workpiece supply pressurized air;
Begin to detect compressed-air actuated back pressure, and obtain described measuring object inner diameter of workpiece size from cutting off according to this testing result through behind the certain hour to described simulation Workpiece supply pressurized air.
3. inner diameter of workpiece dimension measurement method according to claim 1 and 2 is characterized in that described inner diameter of workpiece is of a size of 0.05mm～1mm.
4. inner diameter of workpiece dimension measuring device is used to measure the internal diameter size of cylindrical workpiece, it is characterized in that possessing:
The workpiece maintaining body that is no less than 2 maintenance workpiece;
The air feed mechanism is supplied with pressurized air to the interior perimembranous of the workpiece that is kept by described each workpiece maintaining body;
Back pressure testing agency is detected with the back pressure of described air feed mechanism to the interior perimembranous compressed and supplied air of described workpiece;
Air is supplied with control gear, is set between described each workpiece maintaining body and the described back pressure testing agency, and, each workpiece maintaining body is carried out supplying with compressed-air actuated ON/OFF control from the air feed mechanism to each workpiece maintaining body;
The internal diameter size arithmetical organ is supplied with the ON/OFF information of control gear and with the detected compressed-air actuated back pressure of described back pressure testing agency, is calculated the inner diameter of workpiece size according to described air.
5. internal diameter size measurement mechanism according to claim 4 is characterized in that described inner diameter of workpiece is of a size of 0.05mm～1mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003077258A JP3981763B2 (en) | 2003-03-20 | 2003-03-20 | Method and apparatus for measuring inner diameter of workpiece |
| JP077258/2003 | 2003-03-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1532519A true CN1532519A (en) | 2004-09-29 |
| CN100354600C CN100354600C (en) | 2007-12-12 |
Family
ID=33292060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100301772A Expired - Fee Related CN100354600C (en) | 2003-03-20 | 2004-03-19 | Method and device for measuring inner diameter size of work piece |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3981763B2 (en) |
| CN (1) | CN100354600C (en) |
| TW (1) | TWI276776B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578870A (en) * | 2020-04-30 | 2020-08-25 | 西北工业大学 | Equivalent drift diameter marking method for pintle circular seam channel |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4861121B2 (en) * | 2006-10-19 | 2012-01-25 | 富士通株式会社 | Hollow needle inspection device, hollow needle inspection method, and microinjection system |
| JP7111479B2 (en) * | 2018-03-02 | 2022-08-02 | 株式会社東京精密 | air micro |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088009A (en) * | 1973-06-09 | 1978-05-09 | Akira Fukuda | Air micrometer |
| JPS56111423A (en) * | 1980-02-06 | 1981-09-03 | Cosmo Keiki:Kk | Measuring device for gas flow rate of nozzle valve or the like |
| JP3516289B2 (en) * | 1997-02-17 | 2004-04-05 | 日本電信電話株式会社 | Method and apparatus for measuring dimensions of cylindrical object |
| TW555956B (en) * | 2001-02-16 | 2003-10-01 | Tokyo Seimitsu Co Ltd | Inner diameter size measuring method of work piece and device therefor |
| JP4840631B2 (en) * | 2001-08-29 | 2011-12-21 | 株式会社東京精密 | Inner diameter measuring method and apparatus |
-
2003
- 2003-03-20 JP JP2003077258A patent/JP3981763B2/en not_active Expired - Fee Related
-
2004
- 2004-03-02 TW TW93105403A patent/TWI276776B/en not_active IP Right Cessation
- 2004-03-19 CN CNB2004100301772A patent/CN100354600C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578870A (en) * | 2020-04-30 | 2020-08-25 | 西北工业大学 | Equivalent drift diameter marking method for pintle circular seam channel |
| CN111578870B (en) * | 2020-04-30 | 2021-09-21 | 西北工业大学 | Equivalent drift diameter marking method for pintle circular seam channel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004286510A (en) | 2004-10-14 |
| CN100354600C (en) | 2007-12-12 |
| TWI276776B (en) | 2007-03-21 |
| TW200422584A (en) | 2004-11-01 |
| JP3981763B2 (en) | 2007-09-26 |
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