CN101224470A - Plate producing thickness controlling method - Google Patents
Plate producing thickness controlling method Download PDFInfo
- Publication number
- CN101224470A CN101224470A CNA2008100692825A CN200810069282A CN101224470A CN 101224470 A CN101224470 A CN 101224470A CN A2008100692825 A CNA2008100692825 A CN A2008100692825A CN 200810069282 A CN200810069282 A CN 200810069282A CN 101224470 A CN101224470 A CN 101224470A
- Authority
- CN
- China
- Prior art keywords
- thickness
- calibrator
- micrometer
- calibration
- offline inspection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
- Control Of Metal Rolling (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a thickness control method which is used when a plate is produced, comprising a thickness offline detection operation program and a re-calibration marking process to a thickness gauge according to the offline detection result. The offline detection of the invention is that a manual offline detection is achieved by a micrometer; one end of the micrometer is a plane and the other end thereof is a spherical measurement anvil. The invention is used for the production of an aluminium alloy thin plate, can successfully control the misalignment of the thickness within minus 0.003mm to plus 0.003mm, and completely achieves the requirement of thickness and precision. Except for being used for the production of a 3104 pop can material, the invention can also be applied to the thickness control to production of other alloy thin plates.
Description
Technical field
The present invention relates to a kind of sheet metal thickness control method.
Background technology
With full-aluminium can body material is the jar material materials processing technology of representative and the technical equipment and the level of processing of a processing enterprise of the direct reflection of quality control level, and countries in the world are all with the approach of development tank body materials as raising aluminium process technology level.In the cold rolling process of can body material, the control difficult point is accurate THICKNESS CONTROL and detection, because the fluctuation of thickness 0.001mm all can make system jar stability and the continuity of material when ironing be a greater impact, on production line, produce card jar and the disconnected jar of broken cup, the continuity that influence is produced and become a jar rate, therefore the control of the thick difference of can body material finished product becomes and weighs can body material product quality important evidence as one of topmost technical indicator of cold rolling process.An important development trend of can body material is thickness attenuate day by day at present, the thickness of domestic can body material also is thinned to 0.270mm by 0.430mm, the user has been not content with original ± 0.005mm to the requirement of system jar material finished product thickness tolerance, requires further to improve the product precision.
Before this, the THICKNESS CONTROL and the detection mode that adopt when producing the can body material are: rely on the rolling thickness of milling train self thickness control system according to thickness targets setting value control product on the production line, utilize the thickness measurement online instrument to detect thickness in real time, its measured value is passed to screwdown gear as the feedback signal of thickness control system regulate roll gap, thereby form the THICKNESS CONTROL closed loop.Calibrator is generally gamma thickness gage, though itself certainty of measurement is very high, but because temperature can reduce in the final products process to forming behind the plate hot rolling, because the reason of expanding with heat and contract with cold, or the influence of factor such as the null offset of instrument in use and rolling environment, all there are certain deviation in thickness that calibrator records and the target thickness of thickness control system setting value with the actual (real) thickness of final products, this has just caused the thickness fluctuation of product, so must carry out offline inspection to product.Offline inspection is the two ends of being used by the inspection personnel micrometer manual measurement sheet material transverse and longitudinal thickness as the plane.Surpass when requiring when deviation appears in off-line measurement value and finished product target thickness, promptly calibrator is carried out verification again and demarcate, simultaneously, the exit thickness setting value of milling train final pass is revised, the size of its correction value is decided according to the size of deviate.The advantage of this detection mode is, can observe band in the longitudinal thickness situation of change of a roll in the cycle, thereby can grasp the thickness fluctuation situation of whole coiled material more exactly, its shortcoming is that metering system is more single, Artificial Control micrometer randomness is bigger, and be subjected to the interference of factors such as the plate shape of sample and surface quality easily, measurement result is accurate inadequately, and human error is bigger.The certainty of measurement of this kind metering system is about ± 0.003～0.006mm, so can not satisfy the requirement of user to thickness and precision.
Therefore, require to provide a kind of precision higher, practical thickness production control method.
Summary of the invention
Purpose of the present invention just is to provide a kind of thin plate to produce method for controlling thickness, thereby by the thickness control accuracy in the certainty of measurement raising process of producing product that improves finished product thickness, reduces deviation, and this method is simple and practical.
The present invention adopts following technical scheme: a kind of plate producing thickness controlling method, comprise thickness offline inspection operation sequence and according to the offline inspection result calibrator is carried out the verification calibration process again, it is characterized in that: described offline inspection is meant and adopts one to carry out artificial offline inspection for one on plane for the micrometer of spherical gage button.
For reducing measure error, as further improvement, described offline inspection process is fixed on described micrometer on the anchor clamps that are provided with on the operating desk carries out, each turning knob below corresponding micrometer vernier knob on the anchor clamps, also is provided with baffle plate, so that can not surpass a circle in the adjustment process.
In order to guarantee the accuracy of offline inspection, further comprise the reinspection process, be meant and after offline inspection, adopt the mode of sampling observation to carry out, product is made the sample of certain area, and weigh up its quality, calculate product thickness according to following formula, substandard product is reviewed and the micrometer offline inspection is carried out verification:
d＝m/(S×γ)
In the formula: d is the thickness of measure and monitor the growth of standing timber material, and m is the quality of sample, and S is the surface area of sample, and γ is the density of material.
For guaranteeing the accurate of calibrator, can also improve its calibration process, described demarcation to calibrator comprises static demarcating and dynamic calibration, scaling method is as follows:
(1) static demarcating: under the milling train stopped status, calibrator is return original position, timing signal is gone in the calibrated bolck shelf thickness calibration is packaged, shelf is placed under the calibrator operation window, demarcate three times continuously with same thickness calibration piece after affirmation is in place, require the deviation≤1 μ m between each calibration value and calibrated bolck actual value, the deviation between simultaneously each calibration value is μ m also≤1, can judge that demarcation is qualified, calibrator can drop into normal operating conditions;
(2) dynamic calibration: under the stopped status in the mill milling process, calibrator is in normal operation position, and calibrated bolck is packed in the calibrated bolck shelf, shelf is placed under the calibrator operation window, through confirming that being in place the back carries out the demarcation first time with calibrated bolck.Calibrator is left to original position then and driveed again, adopt same thickness calibration piece to carry out the second time and demarcate to the operating position.Demarcate three times so continuously, require the deviation≤1 μ m between each calibration value and calibrated bolck actual value, the deviation between simultaneously each calibration value is μ m also≤1, can judge that demarcation is qualified; Defective as wherein demarcating for arbitrary time, then must check, handle calibrator, after demarcation is qualified, can produce.
The present invention, for product thickness control provides accurate foundation thereby controls product thickness in the thin plate production process accurately and efficiently by improving the accuracy of detection of product.This method can be controlled at thickness deviation ± 0.003mm in, can reach thickness and required precision, except that being used for 3104 can body material productions, also can be used for the THICKNESS CONTROL that other sheet material is produced.
Description of drawings
Fig. 1 is a micrometer clamp structure schematic diagram.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, to help understanding content of the present invention.
Production process with 3104 can body material is an example, this thin plate production process is: hot rolling blank is rolled according to the target thickness of setting under thickness control system of the rolling mill control, and according to the product thickness in the milling train exit that records with the online calibrator feedback as thickness control system, the automatic adjustment by thickness control system is to obtain stable product thickness.
1, offline inspection: because the detection of thickness measurement online instrument is not the thickness of final products, therefore also product is carried out offline inspection, according to the offline inspection result calibrator being carried out verification demarcates, with the process that the exit thickness setting value of milling train final pass is revised, so that the satisfactory target thickness value of product thickness.
(1) to adopt an end be that one on plane is the micrometer of spherical gage button to offline inspection.Because the plane micrometer is big with measurement plate contact-making surface, when measuring, be subjected to objective factors such as plate of material shape, measurement feel to influence bigger, might cause measurement result inaccurate, so offline inspection is to be that offline inspection is carried out for the digimatic micrometer of spherical gage button 11 in one on plane with an end as shown in Figure 1.After tested, for same model, the plane micrometer, through different Quality Inspectors' measurement, its result differs 0.003～0.008mm, has seriously exceeded technical indicator with same.And with an end be plane one end be the miking of spherical gage button accuracy is higher as a result, the thickness favorable reproducibility.Table 1 has been listed the thickness measurement data of a part can body materials plane micrometer and a flat head shoot shape micrometer, data show under identical metering system, a flat head shoot shape miking result approaches the nominal thickness of can body materials, and the measure error of plane micrometer is bigger, compare with spherical miking value, the highest deviation has reached 0.006mm.
Spherical micrometer of table 1 and tack miking value are relatively
| Sequence number | Nominal thickness | Spherical miking value (mm) | Tack miking value (mm) | Difference (mm) |
| 1 | 0.280 | 0.281 | 0.287 | 0.006 |
| 2 | 0.280 | 0.281 | 0.286 | 0.005 |
| 3 | 0.280 | 0.281 | 0.287 | 0.006 |
| 4 | 0.280 | 0.281 | 0.286 | 0.005 |
| 5 | 0.280 | 0.280 | 0.285 | 0.005 |
| 6 | 0.280 | 0.280 | 0.284 | 0.004 |
| 7 | 0.280 | 0.278 | 0.284 | 0.006 |
| 8 | 0.280 | 0.280 | 0.285 | 0.005 |
| 9 | 0.280 | 0.280 | 0.285 | 0.005 |
| 10 | 0.275 | 0.275 | 0.278 | 0.003 |
| 11 | 0.275 | 0.274 | 0.280 | 0.006 |
| 12 | 0.275 | 0.274 | 0.279 | 0.005 |
| 13 | 0.275 | 0.274 | 0.278 | 0.004 |
| 14 | 0.275 | 0.275 | 0.279 | 0.004 |
| 15 | 0.275 | 0.273 | 0.278 | 0.005 |
(2) utilize the micrometer anchor clamps to reduce measure error
Survey tool is to guarantee that the thick difference of system jar material satisfies the precondition of required precision reliably.Yet the measure error in the measuring process also can influence the accuracy of thickness measure.When measuring with micrometer, the operator will take sample to be tested on the other hand, and another hand is taken micrometer and turn knob, and such one is operation inconvenience, and sample is difficult for being in correct clip position, because the accuracy that the improper meeting influence of clamping is measured; The 2nd, the different operating person is because custom is different, during adjusting knob rotation too fast or cross and all can cause micrometer too tight or too loose slowly to sample holder, two kinds of situations cause that measure error reaches 0.003mm～0.008mm.
In order to reduce the artificial measure error that micrometer produces owing to method of operating is nonstandard, adopt anchor clamps to fix micrometer during measurement, be used for the criterion mode, be further raising certainty of measurement on the basis of spherical micrometer adopting one flat one.Can adopt anchor clamps as shown in Figure 1, comprise a base 1, on base 1, be mounted with a clamp head 2, clamp head is provided with a folder mouth that can insert micrometer, also be provided with on the clamp head and can will insert the folder mouthful hold down gag that interior micrometer compresses, the screw rod among the figure for example, can micrometer be fixedly clamped by clamp head, make when using micrometer, the operator need not to arrest micrometer with hand, not only easy to use but also help sample is carried out correct clamping, eliminate or reduced micrometer the improper measure error that causes of sample holder.Simultaneously, generation for fear of human error, standard Quality Inspector correctly uses micrometer, guarantee the certainty of measurement of micrometer, prepared a metab, be fixed and can stably place and check on the platform, and one flat plate 4 formation adjustment baffle plates have been welded at the 5mm place below micrometer fine setting knob 13 and coarse adjustment knob 12, utilize the baffle plate barrier effect, can only the rotary fine adjustment knob when making thickness measure, and each rotation can not prevent that effectively the inertia that causes too soon because of velocity of rotation when the Quality Inspector measures from causing measurement result generation deviation above a circle.
Table 2 has been listed employing anchor clamps clamping miking data, as can be seen, adopts the measurement result and the nominal thickness of anchor clamps to differ＜0.002mm, and certainty of measurement is quite high, satisfies the requirement of can body materials thickness and precision fully.This is easy to operate, time saving and energy saving, measure error is little, is desirable can body materials tool for measuring thickness.
Table 2 utilizes the anchor clamps measurement result
| Sequence number | Lot number | Nominal thickness mm | Utilize anchor clamps clamping measurement result mm | |
||
| 1 | 736/3 | 0.275 | 0.276 | 0.277 | 0.275 | 0.2760 |
| 2 | 736/3 | 0.275 | 0.275 | 0.275 | 0.275 | 0.2750 |
| 3 | 736/3 | 0.275 | 0.273 | 0.274 | 0.275 | 0.2740 |
| 4 | 736/3 | 0.275 | 0.275 | 0.275 | 0.275 | 0.2750 |
| 5 | 705/1 | 0.280 | 0.280 | 0.281 | 0.281 | 0.2807 |
| 6 | 705/1 | 0.280 | 0.281 | 0.283 | 0.283 | 0.2823 |
| 7 | 705/1 | 0.280 | 0.279 | 0.279 | 0.280 | 0.2793 |
| 8 | 706/2 | 0.280 | 0.279 | 0.281 | 0.282 | 0.2807 |
| 9 | 736/2 | 0.275 | 0.278 | 0.278 | 0.278 | 0.2780 |
| 10 | 736/2 | 0.275 | 0.278 | 0.279 | 0.278 | 0.2783 |
| 11 | 687/4 | 0.285 | 0.288 | 0.288 | 0.289 | 0.2883 |
| 12 | 687/4 | 0.285 | 0.288 | 0.289 | 0.290 | 0.2890 |
| 13 | 687/4 | 0.285 | 0.288 | 0.289 | 0.290 | 0.2890 |
| 14 | 712/3 | 0.285 | 0.287 | 0.288 | 0.290 | 0.2883 |
| 15 | 740/2 | 0.285 | 0.285 | 0.284 | 0.285 | 0.2847 |
| 16 | 740/2 | 0.285 | 0.285 | 0.286 | 0.285 | 0.2853 |
| 17 | 740/2 | 0.285 | 0.286 | 0.285 | 0.285 | 0.2853 |
| 18 | 740/2 | 0.285 | 0.285 | 0.285 | 0.285 | 0.2850 |
| 19 | 740/2 | 0.285 | 0.284 | 0.286 | 0.285 | 0.2850 |
| 20 | 740/2 | 0.285 | 0.284 | 0.285 | 0.285 | 0.2847 |
| 21 | 742/1 | 0.285 | 0.286 | 0.287 | 0.287 | 0.2867 |
| 22 | 742/1 | 0.285 | 0.286 | 0.287 | 0.287 | 0.2867 |
| 23 | 742/1 | 0.285 | 0.286 | 0.286 | 0.286 | 0.2860 |
| 24 | 757/1 | 0.275 | 0.277 | 0.277 | 0.279 | 0.2777 |
2, the reinspection thickness of weighing
For further guaranteeing the accuracy that micrometer detects, can also review or inspect by random samples with the product of micrometer thickness measuring process, reviewing main application one is the measurement of checking that emphasis is used for a small amount of substandard product, the 2nd, the thickness measuring precision of desk-top thickness measurement equipment is spot-check verification.
According to the basic principle of the thickness measuring method of weighing, can obtain the computing formula of thickness:
d＝m/(S×γ)
Wherein: the thickness that d-measures and monitor the growth of standing timber and expects, mm
The quality of m-sample, g
The surface area of S-sample, mm
2, S=π D
2/ 4, D-disk diameter, mm
γ 3104 alloy densities, g/mm
3
According to extensive 3104 alloy densities 2.715 * 10 that adopt of the same industry
-3G/mm
3And 3104 aluminium alloy density 2.72 * 10 of the international standard announcement of IAI's in August, 2006 revision
-3G/mm
3, determine that 3104 systems jar material density is γ=2.71 * 10
-3G/mm
3Sampling equipment be ERICHSEN towards the cup test machine, model is the disk of diameter 64mm.In order to guarantee the accuracy of calculated thickness, must guarantee density of material, towards the isoparametric accuracy of the diameter of disk, will through Chinese Academy of Sciences's Chengdu standard accurately detected thickness on-gauge plate destroy sampling, the gained result is as shown in table 3, difference≤0.001mm between weight method thickness measuring value and the calibrated bolck actual (real) thickness can satisfy the measurement requirement of tank body materials.
The thickness measuring value of weighing of table 3 calibrated bolck
| Thickness of reference block, mm | Example weight, g | The disk diameter, mm | Density, 10 -3g/mm 3 | Calculated thickness, mm |
| 0.2766 | 2.403 | 64 | 2.71 | 0.2756 |
| 0.2766 | 2.404 | 64 | 2.71 | 0.2757 |
3, calibrator is demarcated
Calibrator is the control centre of core in the thickness control system, and calibrator is demarcated will directly have influence on the thickness and precision of product.Be the accuracy that guarantees to demarcate, present embodiment also improves the calibrator scaling method, and calibration process is divided into static demarcating and two kinds of methods of dynamic calibration.
(1) static demarcating:
(1) static demarcating: under the milling train stopped status; calibrator is return original position; timing signal is gone in the calibrated bolck shelf thickness calibration is packaged; shelf is placed under the calibrator operation window; demarcate three times continuously with same thickness calibration piece after affirmation is in place, require the deviation≤1 μ m between each calibration value and calibrated bolck actual value, the deviation between simultaneously each calibration value is μ m also≤1; can judge that demarcation is qualified, calibrator can drop into normal operating conditions.
(2) dynamic calibration
Under the stopped status in the mill milling process, calibrator is in normal operation position, and calibrating procedure is with static identical.Once demarcate defectively as wherein any, then must notify relevant departments to check, handle immediately, can produce after qualified until demarcating.In addition, can dynamically set calibrator target value according to the demarcation situation, promptly around settings that fluctuate of can body materials nominal thickness, be final purpose in control range with the guarantee actual (real) thickness.
Adopt this thin plate to produce method for controlling thickness,, be used for check and demarcate calibrator, control foundation accurately for thickness control system provides by improving the accuracy of measuring, can make the thick difference fluctuation of can body material be controlled at ± 0.003mm in.By using, measure thickness and only exceed inner quality standard 0.001～0.002mm, 0.1% of the not enough output of proportion at southwestern Aluminum group 3104 can body material production lines.
Claims (4)
1. plate producing thickness controlling method, comprise thickness offline inspection operation sequence and according to the offline inspection result calibrator is carried out the verification calibration process again, it is characterized in that: described offline inspection is meant and adopts one to carry out artificial offline inspection for one on plane for the micrometer of spherical gage button.
2. plate producing thickness controlling method as claimed in claim 1, it is characterized in that: described offline inspection operation sequence is described micrometer to be fixed on the anchor clamps carry out, micrometer each turning knob in measuring process below corresponding micrometer vernier knob on the anchor clamps, is provided with baffle plate, so that can not surpass a circle.
3. plate producing thickness controlling method as claimed in claim 1 or 2 is characterized in that, also comprises the reinspection process, be meant after offline inspection and inspect by random samples, method is that product is made the sample with certain area, and weighs up its quality, calculates product thickness according to following formula:
d＝m/(S×γ)
In the formula: d is the thickness of measure and monitor the growth of standing timber material, and m is the quality of sample, and S is the surface area of sample, and γ is the density of material.
4. plate producing thickness controlling method as claimed in claim 1 or 2 is characterized in that, described demarcation to calibrator comprises static demarcating and dynamic calibration, and scaling method is as follows:
(1) static demarcating: under the milling train stopped status, calibrator is return original position, timing signal is gone in the calibrated bolck shelf thickness calibration is packaged, shelf is placed under the calibrator operation window, demarcate three times continuously with same thickness calibration piece after affirmation is in place, require the deviation≤1 μ m between each calibration value and calibrated bolck actual value, the deviation between simultaneously each calibration value is μ m also≤1, can judge that demarcation is qualified, calibrator can drop into normal operating conditions;
(2) dynamic calibration: under the stopped status in the mill milling process, calibrator is in normal operation position, and calibrated bolck is packed in the calibrated bolck shelf, shelf is placed under the calibrator operation window, through confirming that being in place the back carries out the demarcation first time with calibrated bolck; Calibrator is left to original position then and driveed again, adopt same thickness calibration piece to carry out the second time and demarcate to the operating position; Demarcate three times so continuously, require the deviation≤1 μ m between each calibration value and calibrated bolck actual value, the deviation between simultaneously each calibration value is μ m also≤1, can judge that demarcation is qualified; Defective as wherein demarcating for arbitrary time, then must check, handle calibrator, after demarcation is qualified, can produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100692825A CN101224470B (en) | 2008-01-18 | 2008-01-18 | Plate producing thickness controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100692825A CN101224470B (en) | 2008-01-18 | 2008-01-18 | Plate producing thickness controlling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101224470A true CN101224470A (en) | 2008-07-23 |
| CN101224470B CN101224470B (en) | 2010-06-23 |
Family
ID=39856794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100692825A Expired - Fee Related CN101224470B (en) | 2008-01-18 | 2008-01-18 | Plate producing thickness controlling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101224470B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141698A (en) * | 2011-03-04 | 2011-08-03 | 深圳市华星光电技术有限公司 | Film thickness measuring device and correction method thereof |
| CN102200423A (en) * | 2011-02-21 | 2011-09-28 | 刘汉平 | 8sigma standard steel sheet used for production of steel sheets with improved thickness evenness and production method thereof |
| CN111906151A (en) * | 2020-08-14 | 2020-11-10 | 中铝瑞闽股份有限公司 | Method for controlling thickness stability of cold-rolled 3104 alloy pop can aluminum strip |
| CN117102239A (en) * | 2023-08-01 | 2023-11-24 | 杭州富阳立利冷轧有限公司 | Cold rolling mill capable of automatically compensating cold rolling thickness |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471756A (en) * | 1977-11-21 | 1979-06-08 | Kawasaki Steel Corp | Feed-forward type automatic controlling method for sheet gauge |
| CN1775394A (en) * | 2005-11-29 | 2006-05-24 | 苏州有色金属加工研究院 | Thickness adaptive fuzzy control method for aluminium plate band rolling mill |
-
2008
- 2008-01-18 CN CN2008100692825A patent/CN101224470B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200423A (en) * | 2011-02-21 | 2011-09-28 | 刘汉平 | 8sigma standard steel sheet used for production of steel sheets with improved thickness evenness and production method thereof |
| CN102200423B (en) * | 2011-02-21 | 2012-10-03 | 刘汉平 | 8sigma standard steel sheet used for production of steel sheets with improved thickness evenness and production method thereof |
| CN102141698A (en) * | 2011-03-04 | 2011-08-03 | 深圳市华星光电技术有限公司 | Film thickness measuring device and correction method thereof |
| CN102141698B (en) * | 2011-03-04 | 2012-07-11 | 深圳市华星光电技术有限公司 | Film thickness measuring device and correction method thereof |
| WO2012119328A1 (en) * | 2011-03-04 | 2012-09-13 | 深圳市华星光电技术有限公司 | Film thickness measurement device and correction method thereof |
| CN111906151A (en) * | 2020-08-14 | 2020-11-10 | 中铝瑞闽股份有限公司 | Method for controlling thickness stability of cold-rolled 3104 alloy pop can aluminum strip |
| CN117102239A (en) * | 2023-08-01 | 2023-11-24 | 杭州富阳立利冷轧有限公司 | Cold rolling mill capable of automatically compensating cold rolling thickness |
| CN117102239B (en) * | 2023-08-01 | 2024-02-13 | 杭州富阳立利冷轧有限公司 | Cold rolling mill capable of automatically compensating cold rolling thickness |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101224470B (en) | 2010-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101224470B (en) | Plate producing thickness controlling method | |
| CN201688812U (en) | Tooling for measuring depth of groove in hole | |
| CN105094052B (en) | Digit Control Machine Tool and precision methods are corrected automatically | |
| CN202747979U (en) | Part center hole size testing tool | |
| CN115371525A (en) | Measuring gauge and rapid measuring method in production process of large-diameter inner taper hole product | |
| CN107727036A (en) | A kind of demarcation support of displacement transducer | |
| CN115127486A (en) | Calibration method and device for alloy compensation coefficient of X-ray thickness gauge and storage medium | |
| CN213021371U (en) | Measuring tool for rapidly detecting inner diameter size | |
| CN102003931A (en) | Comprehensive detection method and device of tool tapered handle (7:24) | |
| CN101502850B (en) | Method for controlling aluminium strip material periodic thickness difference | |
| CN104697712A (en) | Inspection method for mass center of revolving workpiece | |
| CN108413855B (en) | Calibration and evaluation method of electronic caliper | |
| CN111811377A (en) | Measuring rod special for aviation free forging piece and measuring method thereof | |
| CN101769705B (en) | Gauge block upright isothermal measuring method for calibrating or correcting digital-display height indicator indication error | |
| CN102519412A (en) | Preparation method of galvanized plate zinc layer quality standard plate | |
| CN204535919U (en) | A kind of calibrating installation of novel detecting device for determining torque of spanner | |
| CN201555539U (en) | Air valve check tool | |
| CN210718962U (en) | Groove depth measuring device | |
| CN210773848U (en) | Crankshaft journal taper angle detection device | |
| CN210773865U (en) | Charpy impact specimen side expansion value measuring device | |
| CN203274635U (en) | Calibration device for clamping and accurately positioning on-gauge plate on length measuring instrument | |
| CN216558599U (en) | A cardboard for measuring hot rolling round steel red steel size | |
| CN211651463U (en) | High-precision detection device for measuring outer diameter | |
| CN106052529B (en) | The detection method of PCB counterbore | |
| CN218884867U (en) | Be used for braking pincers top surface excircle axiality to detect measuring tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20160118 |
|
| EXPY | Termination of patent right or utility model |