CN108982094A - A kind of internal screw thread detection structure and detection method - Google Patents
A kind of internal screw thread detection structure and detection method Download PDFInfo
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- CN108982094A CN108982094A CN201811106100.7A CN201811106100A CN108982094A CN 108982094 A CN108982094 A CN 108982094A CN 201811106100 A CN201811106100 A CN 201811106100A CN 108982094 A CN108982094 A CN 108982094A
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- screw thread
- housing
- detection
- internal screw
- inner shaft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The present invention is directed to propose a kind of internal screw thread detection structure, pressure, which is equipped with, in the inner shaft of detection axis and outer inner room surveys inspection portion, for detecting the stress of detector in the detection process, use pressure suffered by the detection axis of thread measurement as judge detect the whether normal judgment basis of operating condition, it is detected with internal threads detection structure global displacement in the prior art to judge that whether qualified screw thread is entirely different, the present invention can be directly, accurately, rapidly detect the working condition of detection axis, and judge the Qualification of internal screw thread, make corresponding judgement, this quick detection and directly detection can it is most effective protection to where gaging hole surface and detector itself.
Description
Technical field
The present invention relates to a kind of thread quality detection field, in particular to a kind of internal screw thread detection structure and detection method.
Background technique
Internal screw thread detection structure is the prior art, and JP Laid-Open 8-178606 discloses such internal screw thread detection
Equipment is substantially a shell and drives main shaft reciprocating mechanism in the axial direction；One sensor is to detect the main shaft institute
The amount of movement stated judges whether screw thread is qualified；If it is predetermined that displacement sensor cannot detect that main shaft has before the deadline
Displacement, illustrate that the detector of main shaft does not enter into detection hole, be then judged as that screw thread is unqualified.
But this technology has very big defect, firstly, its shell has used a large amount of reset spring to keep it in
Scheduled position, multiple springs are used in series, and greatly reduce the reliability of reset, and system is often not returned to because of shell pre-
Positioning is set and is judged by accident；Secondly, those skilled in the art do not have found, and during thread measurement, the feed speed of detector
The precision of meeting internal screw thread is had an impact, if detector feed speed is too fast, the tooth of detector internal threads generates undesirable
Additional power, even can reduce its precision after detection；Third, internal screw thread is much formed in the metallic mirror surface of high smoothness at present
On surface, if internal screw thread detection structure misconnection contacts that detector withstands on hole when metallic mirror surface surface or screw thread mismatch
When mouthful place, detector it is compound under pressure the movement of rotation can scratch metallic mirror surface surface, and above-mentioned patent uses in advance
Fixing time, the below standard screw thread that is just considered as of interior detection main shaft displacement is unqualified, and this control method can be such that detector has scratched
It is unqualified to be just prompted screw thread after product surface.
The reliability of internal screw thread detection structure work how is improved, accuracy in detection and the guarantor to product surface to be measured are improved
Shield is that those skilled in the art wish the technical issues of solving for a long time.
Summary of the invention
In view of this, the present invention is directed to propose a kind of internal screw thread detection structure comprising:
Shell, drive shaft are rotatably installed on shell, and are set at tip of the drive shaft towards the inside of shell
There is driving friction umbrella wheel,
Detection axis, detection axis include housing and inner shaft, and the first friction umbrella wheel 5 and the second friction umbrella wheel are fixed on the coat,
Driving friction umbrella wheel select one with first friction umbrella wheel or second friction umbrella wheel friction-driven cooperation, inner shaft is slideably, coaxially
Ground, which is arranged in housing and can be driven by housing, to be rotated；
Detector, is arranged in the outer end of inner shaft, and detector is equipped with the external screw thread for detection；
Pressure surveys inspection portion, the inner end of inner shaft is arranged in, and between inner shaft and housing, is examining for detecting detector
Stress during survey.
It puts on outside and is arranged with the first spring, the first spring makes the first friction umbrella wheel and drive by being resisted against housing stress step
The engagement of dynamic friction umbrella wheel；
When the first spring is held by stress step pressed towards axle, the first friction umbrella wheel and driving friction umbrella wheel are disengaged, and second rubs
Umbrella wheel is wiped to engage with driving friction umbrella wheel.
It includes frame body that pressure, which surveys inspection portion, and the two sides of frame body are respectively first annular frame and the second toroidal frame, first annular frame
Built-in sensors of large measurement range, the inner shaft inner end of inner shaft are located in first annular frame and abut with sensors of large measurement range, the second annular
Sophisticated sensor built in frame, second spring one end is against on sophisticated sensor and the other end is connected to the bottom wall of housing inner cavity；
The wall of housing is equipped with several through holes, is equipped with latch in hole, the second toroidal frame 7f is limited by several latch
Cylindrical space be oriented to, the wall of housing is additionally provided with limiting slot, and inner shaft is equipped with spacer pin, and spacer pin is at least partially disposed at limit
It is limited in the slot of position and axially slidably slot guiding, torque is transmitted to inner shaft by spacer pin in circumferential housing,
In the first state, inner shaft is offset to the state extended from housing by second spring, and spacer pin is limited at this time
Slot limit；
In the second condition, second spring is inwardly compressed in inner shaft, and frame body is stopped pin limit.
Second toroidal frame and first annular frame are concentric, and the diameter of the second toroidal frame is less than the diameter of first annular frame,
The tip of latch acts against the second toroidal frame lateral wall, and the side of latch can be used for acting against first annular frame back side to stop
The movement of divider body, i.e. frame body are stopped pin limit.
Housing end is equipped with bearing sleeve, connects bearing sleeve and is used for the rotatable positioning of housing in the housing.
It also proposes a kind of internal screw thread detection method, uses aforementioned internal screw thread detection structure, it is characterised in that:
S1: start；
S2: f < f ' is judged whether there is；If it is S5 is executed, S3 is executed if not；
S3: judging whether there is f=fmax, if it is S4 is executed, if not, executing S6；
S4: judging whether there is F < F ', if it is S7 is executed, if not, executing S8；
S5: scheduled internal screw thread detection operation is executed；Return to S2 or end；
S6: the feed speed of fine tuning detector 6a；Return to S2 or end；
S7: the feed speed of coarse adjustment detector 6a；Return to S2 or end；
S8: alarm is shut down；
Wherein, f is the pressure detection value of sophisticated sensor, and f ' is the pressure detecting preset threshold of sophisticated sensor, fmax
Extreme value when failing for the pressure detecting of sophisticated sensor, F are sensors of large measurement range pressure detection value, and F ' is sensors of large measurement range
Pressure detecting preset threshold.
Compared with the existing technology, of the present invention to have the advantage that
(1) proposition of the invention uses pressure suffered by the detection axis of thread measurement to detect operating condition as judgement
Whether normal judgment basis.It was found that the impact force meeting internal threads quality of detection has an impact, proposition of technical problem itself
With regard to creative.Entirely different with the displacement detecting in prior art JP Laid-Open 8-178606 patent, the present invention can be straight
It is connecing, accurate, be quickly detected the working condition of detection axis, and judge the Qualification of internal screw thread, make and sentencing accordingly
It is disconnected, this quick detection and directly detection most effective can protect to where gaging hole surface and detector itself.
(2) pressure of the invention surveys sensor there are two inspection portions, and it is sensors of large measurement range that one, which is sophisticated sensor one,
Different sensors is used under different operating conditions, can take into account the width of precision and range, this corresponds in normal detection
The power that detection axis reversely presses under the impact force of generation and abnormal operating condition is answering for the sensor of two existing middle mature technologies
With solving the expensive sensor for needing to buy and combining precision and range.
(3) in detection method, using the data of two sensor feedbacks, effectively to correspond in actual operating condition,
The detection case of screw thread is detected with simple and effective logic judgment.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is structural schematic diagram described in the embodiment of the present invention；
Fig. 2 is that pressure described in the embodiment of the present invention surveys inspection portion structural schematic diagram；
Fig. 3 is control flow chart described in the embodiment of the present invention.
Description of symbols:
Shell 1, main body 1a, rear cover 1b, side cover 1c, bearing 1d, detection axis 2, bearing sleeve 2a, housing 2b, inner shaft 2c, stop
2d, limiting slot 2e, inner shaft inner end 2f are sold, friction umbrella wheel 3a, driving portion nut 3b, drive shaft 3c, the second friction umbrella wheel 4a are driven,
Second nut 4b, stress step 4c, the first spring 4e, the first friction umbrella wheel 5, detector 6a, inner hole 6b, pressure survey inspection portion 7, frame
Body 7a, sophisticated sensor 7b, sensors of large measurement range 7c, second spring 7d, first annular frame 7e, the second toroidal frame 7f, spacer pin
7g。
Specific embodiment
In order to enable the purposes, technical schemes and advantages of technical solution of the present invention are clearer, below in conjunction with this
The technical solution of the embodiment of the present invention is clearly and completely described in the attached drawing of invention specific embodiment.It is identical in attached drawing
Appended drawing reference represents identical component.It should be noted that described embodiment is a part of the embodiments of the present invention, without
It is whole embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art are being not necessarily to creative work
Under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.It should be noted that not conflicting
In the case of, the feature in embodiment and embodiment in the present invention can be combined with each other.
As shown in Figs. 1-2, the embodiment of the invention provides a kind of internal screw thread detection structures comprising: shell 1, drive shaft
3c is rotatably installed on shell 1, and driving friction umbrella wheel is equipped at tip of the drive shaft towards the inside of shell 1
3a, detection axis 2, detection axis include housing 2b and inner shaft 2c, and the first friction umbrella wheel 5 and the second friction umbrella wheel 4a are fixed on housing
On, driving friction umbrella wheel 3a select one with the first friction umbrella wheel 5 or the second friction umbrella wheel 4a friction-driven cooperation, inner shaft 2c can slide
Dynamic ground is placed coaxially in housing 2b and can drive rotation by housing；The outer end of inner shaft 2c is arranged in detector 6a, inspection
Gauge head 6a is equipped with the external screw thread for detection；Pressure surveys inspection portion 7, the inner end of inner shaft is arranged in, and be located at inner shaft and housing
Between, for detecting the stress of detector in the detection process.
The first spring 4e, the first spring 4e is arranged on housing 2b makes first to rub by being resisted against housing 2b stress step 4c
Umbrella wheel 5 is wiped to engage with driving friction umbrella wheel 3a；
When the first spring 4e presses to bearing by stress step 4c, the first friction umbrella wheel 5 and driving friction umbrella wheel 3a are disengaged,
Second friction umbrella wheel 4a is engaged with driving friction umbrella wheel 3a.
It includes frame body 7a that pressure, which surveys inspection portion 7, and the two sides of frame body 7a are respectively first annular frame 7e and the second toroidal frame 7f, the
The inner shaft inner end 2f of sensors of large measurement range 7c built in one toroidal frame 7e, inner shaft 2c are located in first annular frame 7e and pass with wide range
Sensor 7c is abutted, sophisticated sensor 7b built in the second toroidal frame 7f, and the one end second spring 7d is against on sophisticated sensor 7b and another
One end is connected to the bottom wall of the inner cavity housing 2b；
The wall of housing is equipped with several through holes, is equipped with latch 2d in hole, the second toroidal frame 7f is limited by several latch 2d
The cylindrical space made is oriented to, and the wall of housing is additionally provided with limiting slot 2e, and inner shaft 2c is equipped with spacer pin 7g, and spacer pin 7g is extremely
Small part is located in limiting slot 2e and is axially slidably limited slot 2e guiding, inside by spacer pin 7g in circumferential housing
Axis 2c transmits torque,
In the first state, inner shaft 2c is offset to the state extended from housing by second spring 7d, at this time spacer pin 7g
It is limited slot 2e limit；
In the second condition, second spring 7d is inwardly compressed in inner shaft 2c, and frame body 7a is stopped pin 2d limit.
Second toroidal frame 7f and first annular frame 7e are concentric, and the diameter of the second toroidal frame 7f is less than first annular frame 7e
Diameter, the tip of latch 2d acts against the second toroidal frame 7f lateral wall, and the side of latch 2d can be used for acting against first
Toroidal frame 7e back side carrys out backstop frame body 7a movement, i.e. frame body 7a is stopped pin 2d limit.
The end housing 2b is equipped with bearing sleeve 2a, meets bearing sleeve 2a and is used for the rotatable positioning of housing 2b in the housing.
When in use, drive shaft 3c drives driving friction umbrella wheel 3a rotation to above structure, and the stress step 4c of detection axis 2 exists
It under the action of first spring 4e, is pushed or is biased to rear cover 1b, the first friction umbrella wheel 5 is pressed towards driving friction umbrella wheel at this time
3a, driving friction umbrella wheel 3a drive first friction umbrella wheel 5 to first direction rotate, first friction umbrella wheel 5 successively drive housing 2b,
Inner shaft 2c, detector rotation；
Internal screw thread detection structure is fed to gaging hole, and feed speed and the amount of feeding are controlled by controller.
If screw thread to be measured is qualified screw thread, internal screw thread detection structure is finished by the feeding of scheduled program, detector
Also by the predetermined depth in advances through hole.Later under the action of controller, internal screw thread detection structure is to far from the direction to gaging hole
Movement, since detector is also engaged with the internal screw thread to gaging hole, so detection axis 2 does not occur when internal screw thread detection structure moves
Movement oppresses the first spring 4e, driving friction umbrella wheel 3a and the first friction disengaging of umbrella wheel 5 to stress step 4c, then with second
Friction umbrella wheel 4a is meshed, and at this moment detection axis 2 and detector thereon are rotated to second direction, is detached from to gaging hole.
In the detection process, especially the detector of internal screw thread detection structure with to gaging hole thread contact in a flash,
Detector can give one lateral impact of screw thread to be measured, the usual very little of power of this impact and inevitable, the inner shaft in feeding
2c can survey the reversely compressing second spring 7d of inspection portion 7 by pressure, which can be surveyed the sophisticated sensor 7b in inspection portion 7 according to the by pressure
The force variation record of two spring 7d is uploaded to controller, to determine whether being qualified impact force.
If screw thread to be measured is that bastard thread or detector are not aligned with to gaging hole, the knot of internal screw thread detection at this time
Structure inner shaft 2c in feeding can survey the reversely compressing second spring 7d of inspection portion 7 by pressure, and further pressure surveys the frame body 7a in inspection portion 7
Pin 2d backstop can be stopped, the decrement of second spring becomes definite value and cannot be compressed again at this time, sophisticated sensor 7b also because
This and the variation of inner shaft 2c stress cannot be surveyed again by failing, sensors of large measurement range 7c starts to work, if its pressure value for detecting
Greater than scheduled value, controller can recall internal screw thread detection structure immediately, thus it is guaranteed that detector will not be scratched to where gaging hole
Plane.It in addition is also a kind of protection to detector itself.
As shown in figure 3, proposing a kind of internal screw thread detection method in the present embodiment, internal screw thread above-mentioned detection knot is used
Structure is detected by following steps:
S1: start.
S2: f < f ' is judged whether there is；If it is S5 is executed, S3 is executed if not；That is, if the impact force that detector is subject to
In reasonable range, illustrate that the internal screw thread to gaging hole is qualified, and impact force is also reasonable.But if unreasonable,
It is exactly to enter S3 to judge.
S3: judging whether there is f=fmax, if it is S4 is executed, if not, executing S6；If the pressure of sophisticated sensor
Detected value has reached corresponding maximum value when failure, illustrate that frame body 7a has been stopped pin and has limited, at this moment sophisticated sensor
Pressure detection value will not change again, need to detect pressure with sensors of large measurement range, therefore enter S4.But if f < fmax, explanation
Sophisticated sensor is also working normally, and the speed only fed is improper, and impact force is too big, executes fine tuning feed speed into S6
It can.
S4: judging whether there is F < F ', if it is S7 is executed, if not, executing S8；Judgement at this time is to stop detection also
It is the feed speed that adjust detector on a large scale.
S5: scheduled internal screw thread detection operation is executed；Return to S2 or end.
S6: the feed speed of fine tuning detector 6a；Return to S2 or end.
S7: the feed speed of coarse adjustment detector 6a；Return to S2 or end.
S8: internal screw thread detection structure is shut down or is reversely recalled in alarm.
Wherein, f is the pressure detection value of sophisticated sensor, and f ' is the pressure detecting preset threshold of sophisticated sensor, fmax
Extreme value when failing for the pressure detecting of sophisticated sensor, F are sensors of large measurement range pressure detection value, and F ' is sensors of large measurement range
Pressure detecting preset threshold.
In above-mentioned control method, internal screw thread detection structure measures the impact force of detection using sophisticated sensor, with big
Range sensors to determine whether detection failure so that pressure survey inspection portion be equipped with conventional pressure sensor just can be carried out it is accurate and big
Pressure value under two kinds of operating conditions of range, without being equipped with high-end pressure sensor.Cost is greatly saved.
And the present invention provides a kind of control feed speed to protect the technological means of screw thread to be measured for the first time.By sentencing
Disconnected detector brings the impact force to gaging hole internal screw thread to judge that progress is the further refinement of technological means of the embodiment of the present invention.
Claims (6)
1. a kind of internal screw thread detection structure characterized by comprising
Shell (1), drive shaft (3c) are rotatably installed on shell (1), and in drive shaft towards the inside of shell (1)
Driving friction umbrella wheel (3a) is equipped at tip；
Detection axis (2), detection axis (2) include housing (2b) and inner shaft (2c), and the first friction umbrella wheel (5) and second rubs umbrella wheel
(4a) is fixed on the coat, and driving friction umbrella wheel (3a) selects one and rubs with the first friction umbrella wheel (5) or the second friction umbrella wheel (4a)
Wipe driving cooperation, inner shaft (2c) slideably, be placed coaxially in housing (2b) and rotation can be driven by housing；
Detector (6a), detector (6a) setting are equipped with the outer spiral shell for detection in the outer end of inner shaft (2c), detector (6a)
Line；
Pressure surveys inspection portion (7), and pressure surveys the inner end that inner shaft is arranged in inspection portion (7), and between inner shaft (2c) and housing (2b),
For detecting the stress of detector (6a) in the detection process.
2. internal screw thread detection structure according to claim 1, it is characterised in that:
It is arranged on housing (2b) the first spring (4e), the first spring (4e) is resisted against housing (2b), and stress step (4c) makes
One friction umbrella wheel (5) is engaged with driving friction umbrella wheel (3a)；
When the first spring (4e) presses to bearing by stress step (4c), the first friction umbrella wheel (5) and driving friction umbrella wheel (3a)
It disengages, the second friction umbrella wheel (4a) is engaged with driving friction umbrella wheel (3a).
3. internal screw thread detection structure according to claim 2, it is characterised in that:
It includes frame body (7a) that pressure, which surveys inspection portion (7), and the two sides of frame body (7a) are respectively first annular frame (7e) and the second toroidal frame
The inner shaft inner end (2f) of (7f), sensors of large measurement range (7c) built in first annular frame (7e), inner shaft (2c) are located at first annular frame
It is abutted in (7e) and with sensors of large measurement range (7c), sophisticated sensor (7b) built in the second toroidal frame (7f), second spring (7d)
One end is against on sophisticated sensor (7b) and the other end is connected to the bottom wall of the inner cavity housing (2b)；
The wall of housing is equipped with several through holes, is equipped with latch (2d) in hole, the second toroidal frame (7f) is by several latch (2d)
The cylindrical space limited is oriented to, and the wall of housing is additionally provided with limiting slot (2e), and inner shaft (2c) is equipped with spacer pin (7g), limit
Position pin (7g) is at least partially disposed in limiting slot (2e) and is axially slidably limited slot (2e) guiding, logical in circumferential housing
It crosses spacer pin (7g) and transmits torque to inner shaft (2c)；
In the first state, inner shaft (2c) is offset to the state extended from housing by second spring (7d), at this time spacer pin
(7g) is limited slot (2e) limit；
In the second condition, inner shaft (2c) is inwardly compressed second spring (7d), and frame body (7a) is stopped pin (2d) limit.
4. internal screw thread detection structure according to claim 3, it is characterised in that:
Second toroidal frame (7f) and first annular frame (7e) are concentric, and the diameter of the second toroidal frame (7f) is less than first annular frame
The diameter of (7e), the tip of latch (2d) act against the second toroidal frame (7f) lateral wall, and the side of latch (2d) can be used for
It acts against first annular frame (7e) back side and carrys out backstop frame body (7a) movement, is i.e. frame body (7a) is stopped pin (2d) limit.
5. internal screw thread detection structure according to claim 1, it is characterised in that:
The housing end (2b) is equipped with bearing sleeve (2a), meets bearing sleeve (2a) for being located in shell for housing (2b) is rotatable
(1) in.
6. a kind of internal screw thread detection method uses the internal screw thread detection structure such as any one of claim 3-5, feature
It is:
S1: start；
S2: f < f ' is judged whether there is；If it is S5 is executed, S3 is executed if not；
S3: judging whether there is f=fmax, if it is S4 is executed, if not, executing S6；
S4: judging whether there is F < F ', if it is S7 is executed, if not, executing S8；
S5: scheduled internal screw thread detection operation is executed；Return to S2 or end；
S6: the feed speed of fine tuning detector 6a；Return to S2 or end；
S7: the feed speed of coarse adjustment detector 6a；Return to S2 or end；
S8: alarm is shut down；
Wherein, f is the pressure detection value of sophisticated sensor, and f ' is the pressure detecting preset threshold of sophisticated sensor, and fmax is essence
Extreme value when the pressure detecting failure of close sensor, F are sensors of large measurement range pressure detection value, and F ' is sensors of large measurement range pressure
Detect preset threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811106100.7A CN108982094B (en) | 2018-09-21 | 2018-09-21 | A kind of internal screw thread detection structure and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811106100.7A CN108982094B (en) | 2018-09-21 | 2018-09-21 | A kind of internal screw thread detection structure and detection method |
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| Publication Number | Publication Date |
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| CN108982094A true CN108982094A (en) | 2018-12-11 |
| CN108982094B CN108982094B (en) | 2019-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001264038A (en) * | 2000-03-21 | 2001-09-26 | Mitsubishi Electric Corp | Screw thread chipping detector and screw thread chipping detecting method |
| JP2006343216A (en) * | 2005-06-09 | 2006-12-21 | Osamu Tamura | Screw characteristic testing device and experience learning method, and practical skill educational method using the same |
| CN204758278U (en) * | 2015-06-24 | 2015-11-11 | 张家港市港区电子镀膜有限公司 | Doffer of nut thread inspection machine |
| CN205538172U (en) * | 2016-01-21 | 2016-08-31 | 鲍婉霞 | Interior thread quality detection device of nut |
| CN206609601U (en) * | 2016-12-30 | 2017-11-03 | 东莞市嘉明金属制品有限公司 | Full-automatic internal thread detection device |
| CN207516017U (en) * | 2017-12-08 | 2018-06-19 | 青岛铸辉铜业有限公司 | A kind of screw thread Smart Verify device |
-
2018
- 2018-09-21 CN CN201811106100.7A patent/CN108982094B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001264038A (en) * | 2000-03-21 | 2001-09-26 | Mitsubishi Electric Corp | Screw thread chipping detector and screw thread chipping detecting method |
| JP2006343216A (en) * | 2005-06-09 | 2006-12-21 | Osamu Tamura | Screw characteristic testing device and experience learning method, and practical skill educational method using the same |
| CN204758278U (en) * | 2015-06-24 | 2015-11-11 | 张家港市港区电子镀膜有限公司 | Doffer of nut thread inspection machine |
| CN205538172U (en) * | 2016-01-21 | 2016-08-31 | 鲍婉霞 | Interior thread quality detection device of nut |
| CN206609601U (en) * | 2016-12-30 | 2017-11-03 | 东莞市嘉明金属制品有限公司 | Full-automatic internal thread detection device |
| CN207516017U (en) * | 2017-12-08 | 2018-06-19 | 青岛铸辉铜业有限公司 | A kind of screw thread Smart Verify device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108982094B (en) | 2019-07-16 |
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