CN102320158A - Device for monitoring pre-tightening force of upright posts of four-post oil press in real time - Google Patents
Device for monitoring pre-tightening force of upright posts of four-post oil press in real time Download PDFInfo
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- CN102320158A CN102320158A CN201110256822A CN201110256822A CN102320158A CN 102320158 A CN102320158 A CN 102320158A CN 201110256822 A CN201110256822 A CN 201110256822A CN 201110256822 A CN201110256822 A CN 201110256822A CN 102320158 A CN102320158 A CN 102320158A
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- tightening force
- copper foil
- pressure
- pressure film
- real time
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Abstract
The invention relates to a device for monitoring pre-tightening force of the upright posts of a four-post oil press in real time. A piezoelectric strain electrical pressure film made of a polyvinylidene fluoride material is arranged. The upper and lower surfaces of the pressure film are respectively provided with an annular copper foil electrode. The annular copper foil electrodes of the pressure film are sealed in an insulation protective film. The annular copper foil electrodes are connected with a signal input interface of a signal processing device through a conductor wire. By means of pressure, the electric conduction capacity of the pressure film is changed, and the change of current or voltage on the pressure film is measured; the pre-tightening force between an upright post and a locking nut can be indirectly obtained; the pre-tightening force is converted into direct pressure through the signal processing device and displayed in a display; the pre-tightening force between the upright post of the oil press and the locking nut can be detected and displayed in real time; and the disadvantage of low precision of the oil press resulted from the disappearing of the pre-tightening force and possible resulted product quality and safe accidents of equipment can be effectively prevented.
Description
Technical field
The present invention relates to a kind of supervising device of hydraulic press technical field, a kind of specifically four post hydraulic press column pretightning force real time monitoring apparatus.
Background technology
At present, hydraulic press all need make locking nut and column in the process of assembling, keep a certain size pretightning force, so that hydraulic press can keep precision effectively in the process of work in assembling process.The pretightning force of prior oil pressure machine column is generally measured by torque spanner in the process of assembling and is obtained; Though this method can make the column of four post hydraulic presses obtain correct pretightning force in expection; But,, thereby the former pretightning force that keeps is to some extent little by little disappeared along with hydraulic press constantly receives the effect of external force in long-term use; So not only can reduce the precision of hydraulic press, when serious even can cause the quality accident of product or the security incident of equipment.
Summary of the invention
The objective of the invention is to the column pretightning force that has four post hydraulic presses now because no real time monitoring apparatus; After losing, the pretightning force of column can not in time find; Make the precision forfeiture of hydraulic press easily, and the security incident of product quality accident that possibly cause thus or equipment.
The present invention realizes that the technical scheme that above-mentioned purpose adopts is: this four posts hydraulic press column pretension real time monitoring apparatus comprises column, back timber, insulating protective film, pressure film, annular copper foil electrode, locking nut, signal processing apparatus; This invention has a column that crosses back timber; Above the column between back timber and locking nut, be fixed with insulating protective film.Said insulating protective film upwards is provided with a locking nut.This invention is provided with a pressure film that gathers the piezoelectric strain electricity of attaching undue importance to one thing to the neglect of the other the ethene material; Upper and lower surface at pressure film respectively is provided with an annular copper foil electrode; And pressure film annular copper foil electrode is sealed in the inside of insulating protective film, and the annular copper foil electrode links to each other with the signal input interface of signal processing apparatus through lead.
Operation principle: the present invention changes the conductive capability of pressure film through pressure; And the variation of curtage on the gaging pressure film; Obtain the pretightning force between column and the locking nut indirectly, and be converted into direct pressure through signal processing apparatus and in display, show.
Beneficial effect: the present invention can monitor the variation of pretightning force in time, effectively prevents because the defective that the precision of the hydraulic press that disappearance brought of pretightning force reduces, and the security incident of product quality that possibly cause thus and equipment.
Description of drawings
Accompanying drawing 1 is a structural principle sketch map of the present invention.
As shown in the figure: 1. column, 2. back timber, 3. insulating protective film, 4. pressure film, 5. annular copper foil electrode, 6. locking nut, 7. signal processing apparatus.
The specific embodiment
In the drawings; This four posts hydraulic press column pretension real time monitoring apparatus comprises column 1, back timber 2, insulating protective film 3, pressure film 4, annular copper foil electrode 5, locking nut 6, signal processing apparatus 7; This invention has a column 1 that crosses back timber 2; Above the column 1 between back timber 2 and locking nut 6, be fixed with insulating protective film 3, said insulating protective film 3 upwards is provided with a locking nut 6.This invention is provided with a pressure film 4 that gathers the piezoelectric strain electricity of attaching undue importance to one thing to the neglect of the other the ethene material; Upper and lower surface at pressure film 4 respectively is provided with an annular copper foil electrode 5; And pressure film 4 and annular copper foil electrode 5 are sealed in the inside of insulating protective film 3, and annular copper foil electrode 5 links to each other with the signal input interface of signal processing apparatus 7 through lead.Pressure changes the conductive capability of pressure film 4; And the variation of curtage on the gaging pressure film 4; Obtain the pretightning force between column 1 and the locking nut 6 indirectly; And be converted into direct pressure through signal processing apparatus 7 and in display, show; Can detect the pretightning force that shows between hydraulic press column 1 and the locking nut 6 in real time, effectively prevent because the defective of the precision reduction of the hydraulic press that disappearance brought of pretightning force, and the security incident of product quality that possibly cause thus and equipment.
Claims (2)
1. four post hydraulic press column pretightning force real time monitoring apparatus; The present invention includes: column (1), back timber (2), insulating protective film (3), pressure film (4), annular copper foil electrode (5), locking nut (6), signal processing apparatus (7); This invention has a column (1) that crosses back timber (2); Above the column (1) between back timber (2) and locking nut (6); Be fixed with insulating protective film (3), said insulating protective film (3) upwards is provided with a locking nut (6).
2.
Described according to right 1Four post hydraulic press column pretightning force real time monitoring apparatus; This invention is provided with a pressure film (4) that gathers the piezoelectric strain electricity of attaching undue importance to one thing to the neglect of the other the ethene material in addition; Upper and lower surface at pressure film (4) respectively is provided with an annular copper foil electrode (5); And pressure film (4) annular copper foil electrode (5) is sealed in the inside of insulating protective film (3), and annular copper foil electrode (5) links to each other with the signal input interface of signal processing apparatus (7) through lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110256822A CN102320158A (en) | 2011-09-01 | 2011-09-01 | Device for monitoring pre-tightening force of upright posts of four-post oil press in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110256822A CN102320158A (en) | 2011-09-01 | 2011-09-01 | Device for monitoring pre-tightening force of upright posts of four-post oil press in real time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102320158A true CN102320158A (en) | 2012-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110256822A Pending CN102320158A (en) | 2011-09-01 | 2011-09-01 | Device for monitoring pre-tightening force of upright posts of four-post oil press in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102320158A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112570243A (en) * | 2019-09-30 | 2021-03-30 | 重庆西山科技股份有限公司 | Method and system for controlling pretightening force of ultrasonic transducer |
-
2011
- 2011-09-01 CN CN201110256822A patent/CN102320158A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112570243A (en) * | 2019-09-30 | 2021-03-30 | 重庆西山科技股份有限公司 | Method and system for controlling pretightening force of ultrasonic transducer |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120118 |