CN208281332U - A kind of sunk screw checking impaction state - Google Patents
A kind of sunk screw checking impaction state Download PDFInfo
- Publication number
- CN208281332U CN208281332U CN201820802146.1U CN201820802146U CN208281332U CN 208281332 U CN208281332 U CN 208281332U CN 201820802146 U CN201820802146 U CN 201820802146U CN 208281332 U CN208281332 U CN 208281332U
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- China
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- screw body
- screw
- impaction state
- pin
- elastic washer
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Abstract
The utility model discloses the sunk screws that one kind can check impaction state, include screw body, elastic washer and test pin；Cylindrical hole is provided in screw body；Examining side pin is straight pin, and raised shoulder is examined side and sold in the cylindrical hole for being set to screw body and with cylindrical hole clearance fit, and the shoulder for examining side pin is located at the end of thread of screw body；Elastic washer is set between the shoulder of inspection side pin and the end of thread of screw body.The utility model is suitable for the compression of workpiece and the detection of impaction state during machine adds, and prevents from occurring compressing not firm and leading to work pieces process failure due to screw and tooling threaded hole bottom interference.Whether observation test pin stretches out head of screw inner cavity plane by visual observation, that is, can determine whether impaction state exception, at low cost, high reliablity occurs.
Description
Technical field
The utility model relates to technical fields of mechanical processing, more particularly to the detection to workpiece impaction state.
Background technique
Machining requires to compress workpiece.Compression mode more typical at present is utilized in workpiece auxiliary process
System compresses counter sink on boss, in such a way that standard sunk screw compresses workpiece.This compression mode, which has, to be occupied
Space is small, advantage easy to operate.
But there is also disadvantages for this mode, when screw is torqued-up to fixture bolt hole bottom surface, when workpiece not yet really compresses, by
Operator is only it is observed that the most top surface of screw, whether workpiece impaction state can not normally check, usually due to spiral shell after clamping
It is not firm that nail with the interference of fixture bolt hole bottom surface causes workpiece to compress, and then workpiece work in-process is caused to break down, to large size,
The quality of high value workpiece constitutes larger threat.
It can only be judged indirectly by the way of percussion and by sound in actual processing at present, but this mode reliability
Difference, and it is time-consuming and laborious.Particularly with large-scale workpiece, dozens of housing screw, any of them are often provided on a workpiece
There is exception in the impaction state of one screw, all may cause the failure of workpiece.
Summary of the invention
In view of the above-mentioned problems, the purpose of this utility model is for compression abnormality problem, one kind of invention can be checked
The device of impaction state.
The technical solution of the utility model are as follows:
A kind of sunk screw checking impaction state includes screw body, elastic washer and test pin；In screw body
It is provided with cylindrical hole；Examining side pin is straight pin, and raised shoulder, inspection side, which is sold, to be set in the cylindrical hole of screw body
And with cylindrical hole clearance fit, the shoulder for examining side pin is located at the end of thread of screw body；Elastic washer is set to inspection side pin
Between shoulder and the end of thread of screw body.
Inspection side pin end face is flushed with screw body countersunk head face.
Inspection side pin end face is slightly below screw body countersunk head face.
The screw thread end face of the circular bead surface and screw body of the elastic washer and inspection side pin is by being glued connection.
The elastic washer is rubber washer.
Pressure transition is to deform, and drive test pin along axial by elastic washer by the sunk screw of the utility model
Screw body is stretched out in movement, whether stretches out screw body to determine whether there is the side of abnormal impaction state by observing test pin
Method
When normal impaction state, the bottom of screw does not stress, and test pin and elastic washer are force-free state, test pin
Top surface be lower than sunk screw head inner plane；When there is abnormal impaction state, due to screw bottom and tooling face contact, detection
The bottom of pin is under pressure, and pressure is passed to elastic washer, and washer compression is thinning, drives test pin along screw body
Hole is moved axially upward, and test pin stretches out head of screw inner plane, and it is different to can determine that whether impaction state occurs for observation by visual observation
Often.
The utility model has following good effect compared with the prior art:
1, it can directly, effectively judge workpiece impaction state, high reliablity；
2, discriminant approach is simple, quickly, by visual observation observation you can get it conclusion；
3, at low cost, existing bolt structure can be used after being simply transformed.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples
The structural schematic diagram of Fig. 1 the utility model
Fig. 2 is the normal clamping status diagram of the utility model
Fig. 3 is the utility model exception clamping status diagram
It include: screw body (1), elastic washer (2), test pin (3), workpiece (4), tooling (5) in figure.
Specific embodiment
The utility model is further described with example with reference to the accompanying drawing, but the utility model patent is not limited to
This example.
In Fig. 1, screw body 1, elastic washer 2, test pin 3 are to be connected in series, and test pin 3 is with 1 inner hole of screw body
Clearance fit；Elastic washer 2 and the contact surface of screw body 1 and test pin 3 make three parts be connected as entirety by Nian Jie.
Elastic washer uses rubber washer.
Shown in Fig. 2, embodiment is the signal of normal clamping state, and when normal impaction state, screw, workpiece 4, tooling 5 are
It is sequentially connected in series, the active length of screw body 1 is less than workpiece 4 by the distance between pressure surface and 5 threaded hole baseplane of tooling.
By the screw of screw body 1 and 5 threaded hole of tooling, screw 1,2,3 is set to generate axial movement, when 1 head of screw body
When plane and workpiece 4 are contacted by pressure surface, make workpiece 4 by enough pressing forces.The flank threads of screw body 1 and head at this time
End face stress, test pin 3 and elastic washer 2 are force-free state, and test pin 3 does not generate axial movement, and the top surface of test pin 3 is low
In 1 head cavity plane of screw body, workpiece is positive compressed condition.
Shown in Fig. 3, embodiment is abnormal clamping state signal, and in impaction state, the active length of screw body 1 is greater than
Workpiece 4 is by the distance between pressure surface and 5 threaded hole baseplane of tooling.In screw along the axial movement of 5 threaded hole of tooling, test pin
3 bottom first contacts and is pressurized with 5 threaded hole bottom surface of tooling, and pressure is passed to elastic washer 2 by test pin 3, and washer is caused to become
It is thin, move test pin 3 axially upwardly along 1 inner hole of screw body, test pin 3 stretches out 1 head cavity plane of screw body.Due to
The head end of screw body 1 is with workpiece 4 by pressure surface not in contact with workpiece is not affected by pressure, and workpiece is in abnormal impaction state.
Claims (5)
1. the sunk screw that one kind can check impaction state, which is characterized in that include screw body, elastic washer and test pin；
Cylindrical hole is provided in screw body；Examining side pin is straight pin, and raised shoulder, inspection side, which is sold, is set to screw body
In cylindrical hole and with cylindrical hole clearance fit, the shoulder for examining side pin is located at the end of thread of screw body；Elastic washer setting
Between the shoulder of inspection side pin and the end of thread of screw body.
2. a kind of sunk screw that can check impaction state according to claim 1, which is characterized in that sell end face in the inspection side
It is flushed with screw body countersunk head face.
3. a kind of sunk screw that can check impaction state according to claim 1, which is characterized in that sell end face in the inspection side
Slightly below screw body countersunk head face.
4. a kind of sunk screw that can check impaction state according to claim 1, which is characterized in that the elastic washer with
The circular bead surface of side pin and the screw thread end face of screw body are examined by being glued connection.
5. a kind of sunk screw that can check impaction state according to claim 1, which is characterized in that the elastic washer is
Rubber washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802146.1U CN208281332U (en) | 2018-05-28 | 2018-05-28 | A kind of sunk screw checking impaction state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802146.1U CN208281332U (en) | 2018-05-28 | 2018-05-28 | A kind of sunk screw checking impaction state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208281332U true CN208281332U (en) | 2018-12-25 |
Family
ID=64704992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820802146.1U Active CN208281332U (en) | 2018-05-28 | 2018-05-28 | A kind of sunk screw checking impaction state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208281332U (en) |
-
2018
- 2018-05-28 CN CN201820802146.1U patent/CN208281332U/en active Active
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