CN207180578U - A kind of cubing for measuring inner hole of workpiece circle bounce - Google Patents
A kind of cubing for measuring inner hole of workpiece circle bounce Download PDFInfo
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- CN207180578U CN207180578U CN201721087700.4U CN201721087700U CN207180578U CN 207180578 U CN207180578 U CN 207180578U CN 201721087700 U CN201721087700 U CN 201721087700U CN 207180578 U CN207180578 U CN 207180578U
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Abstract
The utility model discloses a kind of cubing for measuring inner hole of workpiece circle bounce, solves the problems, such as that existing cubing detection workpiece hole inner circle bounce is inconvenient.Technical scheme is a kind of cubing for measuring inner hole of workpiece circle bounce, including bottom plate, a slide rail is fixed with the bottom plate, sliding block is slidably connected on the slide rail, datum plate is fixedly connected with the sliding block, the middle part upper surface location of the datum plate is fixedly connected with hinged seat, one end upper surface of the datum plate is fixedly connected with fixed seat, detection bar is hinged with the hinged seat, the detection bar and the tie point of the hinged seat are located at the middle position of its own, side is fixed with amesdial in the fixed seat, and the thimble of the amesdial lower end is connected to one end that the detection bar is swung up and down.The utility model is rational in infrastructure, and quickly and easily the circle bounce in workpiece hole can be detected.
Description
Technical field
A kind of workpiece circle bounce gauge is the utility model is related to, more particularly to a kind of inspection for measuring inner hole of workpiece circle bounce
Tool.
Background technology
In the process of workpiece, hole is often opened up on workpiece, sometimes the device to hole in the engagement process of workpiece
The size in hole has strict requirements, now just needs to being detected inside the hole on workpiece to judge the work processed
Whether the hole on part is qualified, and according to the difference of workpiece, the instrument of detection is also had nothing in common with each other.
As shown in fig. 7, it is the sectional view of workpiece in figure, Workpiece length is longer, offers and runs through in the shaft core position of workpiece
Hole 1, now need to measure the circle bounce on workpiece in hole.
Now propose a kind of cubing and beated with conveniently measuring the circle on workpiece in hole.
Utility model content
The purpose of this utility model is to provide a kind of cubing that convenient and swift can detect hole inner circle bounce on workpiece.
Above-mentioned technical purpose of the present utility model technical scheme is that：One kind measurement inner hole of workpiece
Justify the cubing of bounce, including bottom plate, be fixed with a slide rail on the bottom plate, sliding block is slidably connected on the slide rail, it is described
Datum plate is fixedly connected with sliding block, the middle part upper surface location of the datum plate is fixedly connected with hinged seat, the datum plate
One end upper surface be fixedly connected with fixed seat, be hinged with detection bar on the hinged seat, the detection bar and the hinged seat
Tie point be located at the middle position of its own, side is fixed with amesdial, and the amesdial lower end in the fixed seat
Thimble be connected to one end that the detection bar is swung up and down.
By using such scheme, make detection bar be located at pin joint both sides bar length it is isometric, workpiece is fixed, then makes
Sliding block is slided on slide rail, and the one end of detection bar away from amesdial is inserted in the hole of workpiece, then pins inspection with hand
Measuring staff abuts one end of amesdial, passes through leverage so that detection bar is connected to workpiece hole away from one end of amesdial
On inwall, work is now rotated further by, abutting that workpiece hole inner circle is beated by detection bar, one to one shows in amesdial position
Show to come, when the total indicator reading of amesdial changes in prescribed limit, then the circle bounce of workpiece calibration position meets to require, sentences
Determine that workpiece is qualified, when the total indicator reading change of amesdial exceed prescribed limit, judge that workpiece is unqualified, detection is easy to operate soon
It is prompt.
The utility model is further arranged to：It is provided through hole in the fixed seat, one end of the detection bar is from institute
State in through hole and pass through, and vertical compression spring is provided with the through hole, one end of the compression spring, which is fixed, to be connected
The lower surface of the detection bar is connected to, the other end is fixedly connected on the hole wall of the through hole.
It is difficult only to push down detection bar by the elastic force of amesdial thimble in itself, by examining by using such scheme
Compression spring is set below measuring staff, then acted on by the elastic force of compression spring, compression spring can jack up one end of detection bar, then
It is remote by lever so that it is connected to all the time on the inwall of workpiece hole when in the other end insertion workpiece hole of detection bar, from
And the detection for facilitating workpiece hole inner circle to beat.
The utility model is further arranged to：Be fixed with mounting seat and dead head on the bottom plate, in the mounting seat and
It is provided with through hole on the dead head, is respectively arranged with the through hole in the through hole in the mounting seat and on the dead head
Cooperate to fix the vertex of a cone of workpiece and top, and the vertex of a cone and the top axis for being co-axially located at the detection bar
On.
By using such scheme, by the vertex of a cone and it is top workpiece is fixed when, on the top insertion workpiece of the vertex of a cone
The other end in hole on workpiece is inserted at one end in hole, top top, can be to work by the vertex of a cone and top effect
Part is fixed, and cause workpiece hole and it is horizontal when detection bar keep coaxial.
The utility model is further arranged to：The vertex of a cone shaft core position insertion, the detection bar deviate from the amesdial
One end pass through inside the vertex of a cone, and this end is fixed with the wearing piece that lower surface is wear-resisting sphere.
By using such scheme, wearing piece is set away from one end of amesdial in detection bar, the lower surface of wearing piece is
Wear-resisting sphere, then when detection bar is connected on the inwall of workpiece hole by the effect of compression spring, workpiece hole size is not
Together, the degree of deflection that detection bar occurs is different, is directly connected on the inwall of hole and measured using detection bar, one be by
In the deflection of detection bar the test position of detection bar can be changed, another is then that heavy wear can occur for detection bar,
After setting wearing piece, because the lower end of wearing piece is wear-resisting sphere, then when detection bar is detected, wearing piece abuts
Too big change will not occur for the position on hole inwall, while wearing piece is more wear-resisting, can reduce abrasion and circle bounce is surveyed
Measure the influence brought.
The utility model is further arranged to：The slide rail that the both ends of the slide rail are fixed with for abutting the sliding block is kept off
Block.
By using such scheme, by setting slide rail block, when sliding block is in the enterprising line slip of slide rail, sliding block can support
It is connected on slide rail block by spacing, by the position-limiting action of slide rail block, can prevents sliding during sliding slider
Block departs from slide rail.
The utility model is further arranged to：The fixed seat is glued with limition orientation seat backwards to the amesdial side,
The limition orientation seat is fixedly connected on the datum plate, is provided with U-type groove on the guide holder, and the detection bar is from the U
Passed through in type groove, and the groove width size of the U-type groove and the diameter of the detection bar etc. are big.
By using such scheme, detection bar is hinged on hinged seat and swung, be hinged when detection bar and hinged seat
When a certain degree of deviation occurs for point, by the amplification of bar length, it can become much larger in the deviation of detection boom end, be led by spacing
The effect of U-type groove on to seat, it can carry out spacing to swinging for detection bar, pass through the common of hinged seat and limition orientation seat
Effect, can be calibrated to detection bar, avoid detection bar that larger left and right skew occurs in the horizontal direction, so as to avoid examining
There is larger offset error during the test point that measuring staff is connected on workpiece hole inwall.
The utility model is further arranged to：The mounting seat is provided with bumper close to hinged seat one side.
By using such scheme, by set bumper can keep away sliding block when sliding adjustment position on slide rail hinged seat and
Fierce collision occurs between mounting seat and causes both to be impacted after deforming to a certain extent to detection.
The utility model is further arranged to：The mounting seat is fixed with the support of the first V-type away from bumper one side
Block, transition seat is fixed with the bottom plate, the second V-type support block, and the second V-type support block are fixed with the transition seat
Between the mounting seat and the dead head.
By using such scheme, workpiece is carried out by the mating reaction of the first V-type support block and the second V-type support block
Support, the workpiece hole location for making now are slightly less than the vertex of a cone and top, workpiece first are placed on into the first V-type support block and the 2nd V
In type support block, then move top, by top and vertex of a cone collective effect, workpiece is gradually jacked up into fixation, so as to reach
It is easily installed the effect of workpiece.
The utility model is further arranged to：Two the first waist-shaped holes side by side are provided with the first V-type support block,
Bolt is interspersed with first waist-shaped hole, bolt thread is connected to the mounting seat, is provided with the second V-type support block
Two the second waist-shaped holes side by side, bolt are interspersed with second waist-shaped hole, bolt thread is connected to the transition seat.
By using such scheme, by the waist-shaped hole being arranged in the first V-type support block and in the second V-type support block,
The height of the first V-type support block of adjustment and the second V-type support block can be moved up and down after the bolt in waist-shaped hole is unscrewed, so as to
So that both can adjust height to support different size of workpiece.
The utility model is further arranged to：The dead head is fixedly connected with away from the second V-type support block side
Installation set, the installation set are socketed in outside the top bar portion, and the collar, the top are connected with the top bar portion
Returning spring is also socketed with the bar portion of point, the both ends of the returning spring are connected to the collar and the installation set respectively,
Described top one end away from the vertex of a cone is hinged with the articulated elements with ripping bar, and the articulated elements is L-shaped and is connected to the peace
Encapsulation, and the top end for being hinged on the articulated elements.
By using such scheme, ripping bar is held, then moves ripping bar so that the corner of L-type articulated elements is connected to peace
On encapsulation, fulcrum is used as using the corner of articulated elements so that articulated elements can pull it is top so that top disengaging workpiece,
Workpiece can be removed smoothly, after new workpiece is placed in V-type support block, unclamps crowbar, pass through returning spring in installation set
With the effect of the collar, returning spring promote again it is top it is withstood new workpiece so that workpiece replacing fixes simple side
Just.
In summary, the utility model has the advantages that：Quickly and easily the circle in workpiece hole can be jumped
It is dynamic to be detected.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of embodiment；
Fig. 2 is the part-structure schematic diagram of embodiment, to embody the coupling part of the second V-type support block and transition seat；
Fig. 3 is the sectional view of example structure；
Fig. 4 is the enlarged drawing of part A in Fig. 3；
Fig. 5 is the enlarged drawing of part B in Fig. 3；
Fig. 6 is the enlarged drawing of C portion in Fig. 3；
Fig. 7 is the sectional view for the workpiece to be detected.
Reference：1st, bottom plate；2nd, slide rail；3rd, sliding block；4th, datum plate；5th, hinged seat；6th, fixed seat；7th, detection bar；8、
Amesdial；9th, through hole；10th, compression spring；11st, mounting seat；12nd, dead head；13rd, the vertex of a cone；14th, it is top；15th, wearing piece；16、
Slide rail block；17th, limition orientation seat；18th, U-type groove；19th, bumper；20th, the first V-type support block；21st, transition seat；22nd, the 2nd V
Type support block；23rd, the first waist-shaped hole；24th, the second waist-shaped hole；25th, installation set；26th, the collar；27th, returning spring；28th, ripping bar；
29th, articulated elements.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in figure 1, a kind of cubing for measuring inner hole of workpiece circle bounce, including one piece of rectangular bottom plate 1, on bottom plate 1
A slide rail 2 is fixed with, two sliding blocks 3 are slidably connected on slide rail 2, and slide rail gear is fixed with the bottom plate 1 at the both ends of slide rail 2
Block 16 departs to prevent limited slip block 3 from slide rail 2, and two sliding blocks 3 are fixedly connected on the lower surface of one piece of datum plate 4 jointly.
With reference to shown in Fig. 1, Fig. 3 and Fig. 4, in figure, the medium position of the upper surface of datum plate 4 is fixed with vertical hinged seat 5,
The left end of the upper surface of datum plate 4 is fixed with fixed seat 6, and the right side of fixed seat 6 is glued with the limition orientation being fixed on datum plate 4
Seat 17, the upper end of fixed seat 6 left side is outwardly and is fixed with amesdial 8.Detection bar 7, detection bar 7 are hinged with hinged seat 5
Middle part be hinged on hinged seat 5, hole 9 is provided through in fixed seat 6, is provided with the upper end of limition orientation seat 17 U-shaped
Groove 18, the left end of detection bar 7 passes through U-type groove 18 and through hole 9 in figure, and diameter of the groove width of U-type groove 18 and detection bar 7 etc. is big
To limit the horizontal hunting of detection bar 7, the left end of detection bar 7 is fixed with one piece of abutting block, and abuts block and be connected to amesdial 8
On thimble, compression spring 10 is provided with through hole 9, the upper end of compression spring 10 is fixed on the lower surface of detection bar 7, compression
The lower end of spring 10 is fixed on the lower end hole wall of through hole 9, passes through the effect of compression spring 10 so that detection bar 7 in figure
Left end moves up, right-hand member declines.In figure the low order end of detection bar 7 be fixedly connected with lower surface be wear-resisting sphere wearing piece 15 with
Abut workpiece.
With reference to shown in Fig. 1, Fig. 3 and Fig. 5, the right side of hinged seat 5 is provided with the mounting seat being fixed on bottom plate 1 in figure
11, mounting seat 11 is provided with through hole across datum plate 4 in mounting seat 11, and the vertex of a cone 13 is fixed with through hole, the vertex of a cone 13
Shaft core position is penetrated, and detection bar 7 is passed through to enter in the hole of workpiece from the inside of the vertex of a cone 13, and the left side of mounting seat 11 is consolidated in figure
Surely there is bumper 19 to prevent hinged seat 5 from directly hitting mounting seat 11.In figure, the right side of mounting seat 11 is further fixed on the first V-type
Support block 20 is used to support the left end of workpiece, is additionally provided with the first waist-shaped hole 23 arranged side by side in the first V-type support block 20, and first
Worn in waist-shaped hole 23 and penetrated bolt, bolt thread, which is connected in mounting seat 11, to be compressed the first V-type support block 20 and be fixed, up and down
Mobile first V-type support block 20 so that position of the bolt in the first waist-shaped hole 23 can adjust the first V-type branch when changing
The bearing height of bracer 20.
With reference to shown in Fig. 1, Fig. 3 and Fig. 6, the low order end in the upper surface of figure bottom plate 1 is fixed with dead head 12, in dead head
Through hole is again provided with 12, is fixed with top 14 in through hole, the top 14 cooperation vertex of a cone 13 presses closer the both ends of workpiece to carry out
It is fixed, it is fixed with transition seat 21 on the bottom plate 1 between mounting seat 11 and dead head 12, fixed second V-type on transition seat 21
Support block 22 is supported to the right-hand member of workpiece, and the second waist-shaped hole 24 arranged side by side is again provided with the second V-type support block 22（Figure
It is visible in 2）, wear in the second waist-shaped hole 24 and penetrated bolt, bolt thread, which is connected on transition seat 21, compresses the second V-type support block 22
It is fixed, moves up and down the second V-type support block 22 so that position of the bolt in the second waist-shaped hole 24 changes, then may be used
It is adjusted with the height to the second V-type support block 22.
Top 14 bar portion is located at the right side of dead head 12, dead head 12 in figure through the through hole on dead head 12 in figure
Right side be fixed with an installation set 25 for entangling top 14 bar portion, be socketed with one in top 14 bar portion in installation set 25
The collar 26, and top 14 bar portion is socketed with returning spring 27, and the both ends of returning spring 27 are connected to the collar 26 and peace respectively
On the inwall of encapsulation 25.Also, top 14 bar portion right-hand member passes installation set 25 in figure, and is hinged with articulated elements on part herein
29, articulated elements 29 is L-shaped, and ripping bar 28 is fixed with articulated elements 29, and moving ripping bar 28 can be so that hinge bar be connected to
Top 14 are levered up in installation set 25 so that the top 14 overall right sides into figure are mobile.
Operating process：After each several part is installed successively, the first V-type support block 20 and the second V-type support block 22 are adjusted
Bearing height so that when both support workpiece jointly, the both ends of workpiece are slightly less than the vertex of a cone 13 and top 14.Then, control
Into figure, left side is mobile on slide rail 2 for sliding block 3 so that the low order end of detection bar 7 is located in the through hole of the vertex of a cone 13 in figure.Then,
By the left end support of workpiece in the first V-type support block 20, ripping bar 28 is moved so that the top 14 right side movements into figure, then put
Lower workpiece so that the right-hand member of workpiece is supported in the second V-type support block 22, then gradually unclamps ripping bar 28, passes through returning spring 27
Effect so that top 14 move to right, it is top 14 cooperation the vertex of a cone 13 workpiece is jacked up.
In next step, the right side into figure of control slide block 3 is slided so that the right-hand member of detection bar 7 is stretched into the hole of workpiece, according to reality
Border needs to measure the position of sliding block 3 to determine that detection bar 7 stretches into the position detected in workpiece hole.When detection bar 7 stretches into work
After in the hole of part, acted on by the elastic force of compression spring 10 so that the right-hand member of detection bar 7 moves down so that wearing piece 15 abuts
On the inwall of workpiece hole, now the left end of detection bar 7 jacks up the thimble of amesdial 8 so that the total indicator reading hair on amesdial 8
Changing, the long ratio of bar for the pin joint left and right sides being hinged on according to detection bar 7 on hinged seat 5 can calculate 7 liang of detection bar
The displacement ratio at end, if the bar length in pin joint both sides is one to one, the left and right end movement of detection bar 7 is equal.Finally turn
Start building part, then the position that the wearing piece 15 in figure in detection bar 7 is connected on the inwall of workpiece hole changes, and observes amesdial
8 total indicator reading change, if reading change, in allowed band, workpiece is qualified, and reading exceeds allowed band, then workpiece is not
It is qualified.
This specific embodiment is only that it is not to limitation of the present utility model, ability to explanation of the present utility model
Field technique personnel can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but
As long as all protected in right of the present utility model by Patent Law.
Claims (10)
- A kind of 1. cubing for measuring inner hole of workpiece circle bounce, it is characterised in that：Including bottom plate（1）, the bottom plate（1）On be fixed with One slide rail（2）, the slide rail（2）On slidably connect sliding block（3）, the sliding block（3）On be fixedly connected with datum plate（4）, The datum plate（4）Middle part upper surface location be fixedly connected with hinged seat（5）, the datum plate（4）One end upper surface consolidate Surely it is connected with fixed seat（6）, the hinged seat（5）On be hinged with detection bar（7）, the detection bar（7）With the hinged seat（5） Tie point be located at the middle position of its own, the fixed seat（6）Upper side is fixed with amesdial（8）, and described thousand points Table（8）The thimble of lower end is connected to the detection bar（7）The one end swung up and down.
- A kind of 2. cubing for measuring inner hole of workpiece circle bounce according to claim 1, it is characterised in that：The fixed seat （6）On be provided through hole（9）, the detection bar（7）One end from the through hole（9）Inside pass through, and the through hole （9）Inside it is provided with vertical compression spring（10）, the compression spring（10）One end be fixedly connected on the detection bar（7）'s Lower surface, the other end are fixedly connected on the through hole（9）Hole wall on.
- A kind of 3. cubing for measuring inner hole of workpiece circle bounce according to claim 1, it is characterised in that：The bottom plate（1） On be fixed with mounting seat（11）And dead head（12）, the mounting seat（11）The upper and dead head（12）On be provided with it is logical Hole, the mounting seat（11）On through hole in and the dead head（12）On through hole in be respectively arranged with mutual cooperation with fixation The vertex of a cone of workpiece（13）With it is top（14）, and the vertex of a cone（13）With it is described top（14）It is co-axially located at the detection bar（7） Axis on.
- A kind of 4. cubing for measuring inner hole of workpiece circle bounce according to claim 3, it is characterised in that：The vertex of a cone（13） Shaft core position penetrates, the detection bar（7）Away from the amesdial（8）One end from the vertex of a cone（13）Inside passes through, and this End is fixed with the wearing piece that lower surface is wear-resisting sphere（15）.
- A kind of 5. cubing for measuring inner hole of workpiece circle bounce according to claim 1, it is characterised in that：The slide rail（2） Both ends be fixed with for abutting the sliding block（3）Slide rail block（16）.
- A kind of 6. cubing for measuring inner hole of workpiece circle bounce according to claim 1, it is characterised in that：The fixed seat （6）Backwards to the amesdial（8）Side is glued with limition orientation seat（17）, the limition orientation seat（17）It is fixedly connected on described Datum plate（4）, U-type groove is provided with the guide holder（18）, the detection bar（7）From the U-type groove（18）Inside pass through, and institute State U-type groove（18）Groove width size and the detection bar（7）Diameter etc. it is big.
- A kind of 7. cubing for measuring inner hole of workpiece circle bounce according to claim 3, it is characterised in that：The mounting seat （11）Close to the hinged seat（5）Simultaneously it is provided with bumper（19）.
- A kind of 8. cubing for measuring inner hole of workpiece circle bounce according to claim 7, it is characterised in that：The mounting seat （11）Away from the bumper（19）Simultaneously it is fixed with the first V-type support block（20）, the bottom plate（1）On be fixed with transition seat （21）, the transition seat（21）On be fixed with the second V-type support block（22）, and the second V-type support block（22）Positioned at described Mounting seat（11）With the dead head（12）Between.
- A kind of 9. cubing for measuring inner hole of workpiece circle bounce according to claim 8, it is characterised in that：First V-type Support block（20）On be provided with two the first waist-shaped holes side by side（23）, first waist-shaped hole（23）Inside it is interspersed with bolt, spiral shell Bolt is threadedly connected to the mounting seat（11）, the second V-type support block（22）On be provided with two the second waist-shaped holes side by side （24）, second waist-shaped hole（24）Bolt is inside interspersed with, bolt thread is connected to the transition seat（21）.
- A kind of 10. cubing for measuring inner hole of workpiece circle bounce according to claim 8, it is characterised in that：The dead head （12）Away from the second V-type support block（22）Side is fixedly connected with installation set（25）, the installation set（25）It is socketed in institute State top（14）Bar portion outside, it is and described top（14）Bar portion on be connected with the collar（26）, it is described top（14）Bar portion On be also socketed with returning spring（27）, the returning spring（27）Both ends be connected to the collar respectively（26）With the installation Set（25）, it is described top（14）Away from the vertex of a cone（13）One end be hinged with band ripping bar（28）Articulated elements（29）, the hinge Fitting（29）It is L-shaped and be connected to the installation set（25）, and it is described top（14）It is hinged on the articulated elements（29）End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087700.4U CN207180578U (en) | 2017-08-29 | 2017-08-29 | A kind of cubing for measuring inner hole of workpiece circle bounce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721087700.4U CN207180578U (en) | 2017-08-29 | 2017-08-29 | A kind of cubing for measuring inner hole of workpiece circle bounce |
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| CN207180578U true CN207180578U (en) | 2018-04-03 |
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ID=61739279
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|---|---|---|---|
| CN201721087700.4U Active CN207180578U (en) | 2017-08-29 | 2017-08-29 | A kind of cubing for measuring inner hole of workpiece circle bounce |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109015108A (en) * | 2018-09-27 | 2018-12-18 | 四川职业技术学院 | A kind of lathe part alignment device |
| CN109883297A (en) * | 2019-03-29 | 2019-06-14 | 泰州润骐防务科技有限公司 | Internal diameter error meter |
| CN114111495A (en) * | 2021-11-05 | 2022-03-01 | 新乡航空工业(集团)有限公司 | Jumping measurement gauge with external thread as reference |
| CN114295027A (en) * | 2021-11-29 | 2022-04-08 | 辽沈工业集团有限公司 | Instrument for measuring deviation of projectile body wall |
-
2017
- 2017-08-29 CN CN201721087700.4U patent/CN207180578U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109015108A (en) * | 2018-09-27 | 2018-12-18 | 四川职业技术学院 | A kind of lathe part alignment device |
| CN109015108B (en) * | 2018-09-27 | 2023-07-14 | 四川职业技术学院 | Part alignment device for machine tool |
| CN109883297A (en) * | 2019-03-29 | 2019-06-14 | 泰州润骐防务科技有限公司 | Internal diameter error meter |
| CN114111495A (en) * | 2021-11-05 | 2022-03-01 | 新乡航空工业(集团)有限公司 | Jumping measurement gauge with external thread as reference |
| CN114111495B (en) * | 2021-11-05 | 2023-08-04 | 新乡航空工业(集团)有限公司 | Jumping measurement gauge taking external thread as reference |
| CN114295027A (en) * | 2021-11-29 | 2022-04-08 | 辽沈工业集团有限公司 | Instrument for measuring deviation of projectile body wall |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |