CN106563877B - The connection method of vibratory string in a kind of type vibration wire earth pressure gauge - Google Patents
The connection method of vibratory string in a kind of type vibration wire earth pressure gauge Download PDFInfo
- Publication number
- CN106563877B CN106563877B CN201610969405.5A CN201610969405A CN106563877B CN 106563877 B CN106563877 B CN 106563877B CN 201610969405 A CN201610969405 A CN 201610969405A CN 106563877 B CN106563877 B CN 106563877B
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- support seat
- vibratory string
- clamping plate
- support base
- left support
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/24—Preliminary treatment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/10—Measuring force or stress, in general by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention discloses a kind of connection method of vibratory string in type vibration wire earth pressure gauge, vibratory string and support base are fixed together by the way of ultrasonic bonding, ultrasonic activation is applied to the outer surface of support base clamping plate using ultrasonic brazing unit, to firmly weld together the vibratory string being located in the clamping plate of support base with clamping plate.The connection method of vibratory string has the advantages that in a kind of type vibration wire earth pressure gauge of the present invention：(1) simple for process, easily operated, vibratory string does not loosen after the completion of connection, achievees the purpose that the vibratory string of tensioning and the clamping plate permanent bond of support base；(2) it is not necessarily to the thread mill drilling on the clamping plate of support base, overcomes the problem of vibratory string easily loosens, service life is long, and stability is good so that the measurement data of type vibration wire earth pressure gauge is accurately consistent.
Description
Technical field
The invention belongs to civil engineering field of test instrument, are related to type vibration wire earth pressure gauge field, and in particular to be one
The improvement of the connection method of vibratory string in kind type vibration wire earth pressure gauge.
Background technology
Type vibration wire earth pressure gauge is to measure earth and rockfill dam, breakwater, skyscraper, bridge pier, retaining wall, tunnel, subway, highway
Effective monitoring device of the compression of the building foundations such as structure and the soil body simultaneously can be used for understanding soil pressure inside tested works
The temperature of power variable quantity, embedded point.
Existing type vibration wire earth pressure gauge is usually by backboard 1 ', tablet 2 ', signal-transmitting cable 3 ', vibratory string 4 ', support
Seat 5 ' and electromagnetic coil 6 ' etc. compositions, as shown in Figure 1.Wherein tablet 2 ' is threadably connected with backboard 1 ', tablet 2 '
The rubber washer 7 ' of a diameter of 2mm is lined between backboard 1 ', the operation principle of type vibration wire earth pressure gauge is when tested works
When interior soil stress changes, tablet 2 ' synchronizes the variation for experiencing stress, and tablet 2 ' will be deformed, and displacement transfer is given
Vibratory string 4 ' is transformed into the variation of vibratory string stress, and to change the vibration frequency of vibratory string 4 ', 6 ' exciting vibratory string 4 ' of electromagnetic coil is simultaneously surveyed
Its vibration frequency is measured, frequency signal is transmitted to reading plotter through signal-transmitting cable 3 ', you can the pressure for measuring tested works is answered
Force value, and the temperature value for measuring embedded point can be synchronized.Type vibration wire earth pressure gauge is widely used in Shui profit Shui electricity ﹑ Gong road Tie Lu ﹑ at present
The physical quantity in bridge Sui Dong ﹑ Kuang Shan ﹑ national defence and Construction Safety monitoring field.
The vibratory string of existing type vibration wire earth pressure gauge is using the mechanical connection manner of screw fastening vibratory string, specific connection type
It is as follows：The threaded hole being of moderate size is processed on the clamping plate of the support base 5 ' of clamping vibratory string 4 ' first, then by soket head cap screw
8 ' screw in threaded hole, are pressed from both sides the vibratory string 4 ' of tensioning by screwing soket head cap screw 8 ' and making the clamping plate generation clamping force of support base 5 '
Gu but such clamping mode can not be consolidated permanently.
Type vibration wire earth pressure gauge is chronically in complicated dynamic duty environment, current type vibration wire earth pressure gauge vibratory string
Connection type can lead to problems with occur：(1) due to using screw fastening means, the lengthening with usage time and vibratory string
Situations such as vibration, vibratory string will appear easy loosening, and tension reduces, and amplitude reduces；(2) loosening vibrated can cause sensor to be converted
There is large error in data, cannot reflect actual measured value, cannot be satisfied the demand of measuring instrument high-precision result；(3) exist
Thread mill drilling can reduce its working strength on the clamping plate of the support base of vibratory string.
Ultrasonic bonding is mechanical vibrational energy (more than 16kHz) the connection same metal or xenogenesis gold using supersonic frequency
A kind of specific process belonged to, metal neither convey electric current to workpiece, also do not impose high temperature to workpiece when carrying out ultrasonic bonding
Heat source, only under static pressure, the frictional work, deformation energy and the limited Wen Sheng that vibrational energy are changed between workpiece.Some
Metallurgical binding between metal joint is a kind of solid State Welding realized in the case that base material does not melt.Therefore ultrasonic bonding
Both generated splashing and oxidative phenomena when resistance welding had been effectively overcomed, it is excessively high, molten also to compensate for electric arc welding heat
Fracture of wire string can not form the shortcomings that effective connector.
Invention content
The purpose of the present invention is to provide a kind of connection method of vibratory string in type vibration wire earth pressure gauge, the connection method techniques
Simply, easily operated, vibratory string does not loosen after the completion of connection, is achieved the permanent bond of vibratory string and support base, overcomes and shake
The problem of string easily loosens, service life is long, and stability is good so that the measurement data of type vibration wire earth pressure gauge is accurate.
In order to achieve the above objectives, solution of the invention is：
The connection method of vibratory string in a kind of type vibration wire earth pressure gauge, support base of the connection method based on vibratory string fixation are real
Existing, the support base includes the left support seat and right support seat of aluminum, the upper end of the left support seat and the right support seat
Upper end is respectively provided with the clamping plate that two panels is oppositely arranged, and forms the crack passed through for vibratory string between the clamping blocks, in the left branch
Length direction in support seat along the left support seat opens up a through-hole, or along the right support seat in the right support seat
Length direction opens up a through-hole；
The connection method includes the following steps：
(1) pretreatment of vibratory string：According between the left support seat and the length of the right support seat, two support bases away from
From, obtain the corresponding length that vibratory string is located in the crack, in the crack vibratory string part spray one layer of aluminium film；
(2) fixation of vibratory string：Through-hole of the vibratory string out of described left support seat or the through-hole in the right support seat are worn
Later, then reversely penetrate between the crack of corresponding support base, one end of vibratory string fixes outside through-hole, and the other end of vibratory string passes through
Idler wheel strainer tenses, and keeps vibratory string parallel with horizontal plane；
(3) determination of pad：Pad is located on the outer surface of the clamping plate of the left support seat and the right support
On the outer surface of the clamping plate of seat, the spacing of the center of the pad in the left support seat and the left hand edge of left support seat is 10-
15mm and be 5-10mm, center and the right support seat of the pad on the right support seat with the spacing of the top edge of left support seat
The spacing of right hand edge be 10-15mm and be 5-10mm with the spacing of the top edge of right support seat；
(4) ultrasonic bonding：First the left support seat for offering the through-hole or the right support seat are positioned over
Between two applicators of ultrasonic brazing unit, each applicator is respectively aligned to the pad of corresponding support base, to the left side
Support base or the right support seat apply ultrasonic activation, natural cooling so that are located at the left support seat or right support
Vibratory string and clamping plate between the clamping plate of seat is integrally welded, then welds the vibratory string of another support base, finally cuts off positioned at the branch
Vibratory string extra outside seat is supportted, the connection between vibratory string and the support base is just completed.
The distance between described clamping plate is 0.25mm, a diameter of 0.25mm of the through-hole.
In step (4), welding pressure 14-18Mpa, bonding power 4000-4500W, weld amplitude are 18-20 μm,
Weld interval is 1-1.5s.
In step (4), argon gas or helium are passed through to pad while welding.
The connection method of vibratory string in a kind of type vibration wire earth pressure gauge of the present invention, by the way of ultrasonic bonding by vibratory string with
Support base is fixed together, and is had the advantages that：
(1) simple for process, easily operated, vibratory string does not loosen after the completion of connection, reaches the vibratory string of tensioning and the folder of support base
Plate achievees the purpose that permanent bond；
(2) it is not necessarily to the thread mill drilling on the clamping plate of support base, overcomes the problem of vibratory string easily loosens, service life is long,
Stability is good so that the measurement data of type vibration wire earth pressure gauge is accurate.
Further, the weld amplitude of welding process is determined by the thickness and material of weldment, with material hardness and thickness
It improves, the amplitude of selection accordingly increases, and Application Range is 18~20 μm；Excessive pressure makes frictional force is excessive to cause in order to prevent
Relative motion weakens between weldment, and welding pressure is advisable with 14Mpa, weld interval refer to ultrasonic energy input weldment when
Between, the formation of solder joint there are one minimum weld interval, be not enough to destroy metal oxide film surface less than the weld interval and can not
Welding, is usually no more than 1.5s, therefore weld interval is advisable with 1-1.5s for the weld interval of metal thick plate.
Further, when welding, in order to prevent the surface of the support base of aluminum due to friction generate Wen Sheng cause to aoxidize, can
It is passed through argon gas or helium is protected.
Description of the drawings
Fig. 1 is the connection diagram of vibratory string in existing type vibration wire earth pressure gauge；
Fig. 2 is the positive structure schematic of left support seat in the present invention；
Fig. 3 is the side structure schematic view of left support seat in the present invention；
Fig. 4 is the side structure schematic view of right support seat in the present invention；
Fig. 5 is the pretreated schematic diagram of vibratory string in the present invention；
Fig. 6 is the structural schematic diagram that support base is connect with vibratory string in the present invention；
Fig. 7 is the schematic diagram of left support seat and vibratory string welding in the present invention；
Fig. 8 is the schematic diagram of right support seat and vibratory string welding in the present invention；
Fig. 9 is the schematic diagram for completing welding in the present invention between support base and vibratory string.
In figure：
1 ' tablet 2 ' of backboard
3 ' vibratory string 4 ' of signal-transmitting cable
5 ' electromagnetic coil 6 ' of support base
7 ' soket head cap screw 8 ' of rubber washer
1 clamping plate 11 of left support seat
12 through-hole 13 of crack
2 clamping plate 21 of right support seat
22 vibratory string 3 of crack
4 idler wheel strainer 5 of locating wheel
6 applicator 61 of ultrasonic brazing unit
611 hemispherical end face 612 of applicator ontology
Specific implementation mode
In order to further explain the technical solution of the present invention, being explained in detail the present invention below by specific embodiment
It states.
The connection method of vibratory string in a kind of type vibration wire earth pressure gauge, support base of the connection method based on vibratory string fixation are real
Existing, which includes the following steps：
(1) processing of support base upper clamp plate：As shown in figs 2-4, the material of support base is LY12 aluminium alloys, support base packet
Left support seat 1 and right support seat 2 are included, the upper end of left support seat 1 and the upper end of right support seat 2 are respectively provided with what two panels was oppositely arranged
Clamping plate, between the clamping plate 11 of left support seat 1 processing form the crack 12 that is passed through for vibratory string, right support seat 2 clamping plate 21 it
Between also processing form the crack 22 that is passed through for vibratory string, the width b of crack 12 and 22 is 0.25mm, takes negative common difference -0.1mm (i.e. together
Spacing on one support base between two panels clamping plate is 0.25mm), the length direction along left support seat 1 in left support seat 1 opens up
The diameter D of one through-hole 13, through-hole 13 is 0.25mm.
(2) pretreatment of vibratory string：As shown in Figure 3-Figure 5, according to the length d of left support seat 1 and right support seat 2, two supports
The distance between seat l, obtains the corresponding length that vibratory string 3 is located in crack 12 and 22, to the vibratory string portion in crack 12 and 22
Divide spraying one layer of aluminium film.
(3) fixation of vibratory string：As shown in Fig. 3, Fig. 4 and Fig. 6, by the first end of vibratory string 3 by the right end of left support seat 1 from logical
After hole 13 passes through, then the crack 12 of left support seat 1, the crack 22 of right support seat 2 are reversely penetrated successively from the left end of left support seat 1
Interior, the second end of vibratory string 3 is fixed by locating wheel 4 outside the through-hole 13 of left support seat 1, and the first end of vibratory string 3 passes through idler wheel
Tight mechanism 5 tenses, and keeps vibratory string 3 parallel with horizontal plane.
(4) determination of pad：As shown in fig. 6, pad be located on the outer surface of the two panels clamping plate 11 of left support seat 1 with
And on the outer surface of the two panels clamping plate 21 of right support seat 2, the left side at the center and left support seat 1 of the pad in left support seat 1
The interval S 1 of edge is 10-15mm and is 5-10mm, the pad on right support seat 2 with the interval S of the top edge of left support seat 12
The interval S 3 of right hand edge of center and right support seat 2 be 10-15mm and be 5- with the interval S of the top edge of right support seat 4
10mm。
(5) ultrasonic bonding：As shown in Fig. 3, Fig. 7-Fig. 9, the left support seat 1 for offering through-hole 13 is first positioned over ultrasound
Between two applicators 61 of wave soldering connection device 6, each applicator 61 is respectively aligned to the pad on the clamping plate 11 of left support seat 1,
Apply ultrasonic activation, welding pressure 14Mpa, bonding power 4000W to the clamping plate 11 of left support seat 1, weld amplitude is
18-20 μm, stop ultrasonic activation, natural cooling after welding 1-1.5s so that the vibratory string being located between the clamping plate 11 of left support seat 1
3 is integrally welded with clamping plate 11, then welds the vibratory string 3 in right support seat 2 with same method, finally apart from right support seat 2
Extra vibratory string 3 outside right support seat 2 is cut off at outer 5mm, just completes the connection between vibratory string 3 and support base.
The connection method of vibratory string in a kind of type vibration wire earth pressure gauge of the present invention, by the way of ultrasonic bonding by vibratory string with
Support base is fixed together, and is had the advantages that：
(1) simple for process, easily operated, vibratory string does not loosen after the completion of connection, reaches the vibratory string of tensioning and the folder of support base
Plate achievees the purpose that permanent bond；
(2) it is not necessarily to the thread mill drilling on the clamping plate of support base, overcomes the problem of vibratory string easily loosens, service life is long,
Stability is good so that the measurement data of type vibration wire earth pressure gauge is accurate.
Further, since vibratory string 3 is steel wire string, and support base is made by aluminium alloy, to the vibratory string in crack
Part sprays one layer of aluminium film, it is therefore an objective to since same metal is consistent to the amplitude of ultrasonic sensing, can make after ultrasonic bonding
Obtaining the vibratory string being located in crack can preferably weld together with the clamping plate of support base.
Further, in step (3), vibratory string tension (tensioning degree) is adjusted by idler wheel strainer 5 so that vibratory string 3
Tensioning degree meets the requirement standard of type vibration wire earth pressure gauge.
Further, the weld amplitude of welding process is determined by the thickness and material of weldment, with material hardness and thickness
It improves, the amplitude of selection accordingly increases, and Application Range is 18-20 μm；Excessive pressure makes frictional force is excessive to cause in order to prevent
Relative motion weakens between weldment, and welding pressure is advisable with 14Mpa, weld interval refer to ultrasonic energy input weldment when
Between, the formation of solder joint there are one minimum weld interval, be not enough to destroy metal oxide film surface less than the weld interval and can not
Welding, is usually no more than 1.5s, therefore weld interval is advisable with 1-1.5s for the weld interval of metal thick plate.
Further, as shown in fig. 7, applicator 61 includes applicator ontology 611 and the hemispherical end face with welding point contact
612, applicator ontology 611 is made using high-speed steel, and hemispherical end face 612 is made using beating steel GCr15, hemispherical
The radius of end face 612 is 25mm, and when welding, the center of hemispherical end face 612 and the center of pad align, to ensure to weld
Connect effect.
Further, when welding, in order to prevent the surface of the support base of aluminum due to friction generate Wen Sheng cause to aoxidize, can
It is passed through argon gas at pad or helium is protected.
Idler wheel strainer 5, ultrasonic brazing unit 6 in the present invention are the known device of this field.
The product form and style of above-described embodiment and schema and the non-limiting present invention, any technical field it is common
The appropriate changes or modifications that technical staff does it all should be regarded as the patent category for not departing from the present invention.
Claims (4)
1. the connection method of vibratory string in a kind of type vibration wire earth pressure gauge, support base of the connection method based on vibratory string fixation is real
It is existing, it is characterised in that：The support base includes the left support seat and right support seat of aluminum, the upper end of the left support seat and described
The upper end of right support seat is respectively provided with the clamping plate that two panels is oppositely arranged, and forms the crack passed through for vibratory string between the clamping blocks,
Length direction along the left support seat in the left support seat opens up a through-hole, or along described in the right support seat
The length direction of right support seat opens up a through-hole；
The connection method includes the following steps：
(1) pretreatment of vibratory string：According to the distance between the left support seat and the length of the right support seat, two support bases,
The corresponding length that vibratory string is located in the crack is obtained, one layer of aluminium film is sprayed to the vibratory string part in the crack；
(2) fixation of vibratory string：After through-hole of the vibratory string out of described left support seat or the through-hole in the right support seat are passed through,
It reversely penetrates between the crack of corresponding support base again, one end of vibratory string fixes outside through-hole, and the other end of vibratory string passes through idler wheel
Strainer tenses, and keeps vibratory string parallel with horizontal plane；
(3) determination of pad：Pad is located on the outer surface of the clamping plate of the left support seat and the right support seat
On the outer surface of clamping plate, the spacing of the center of the pad in the left support seat and the left hand edge of left support seat is 10-15mm
And with the spacing of the top edge of left support seat it is 5-10mm, the right side at the center and right support seat of the pad on the right support seat
The spacing at edge is 10-15mm and is 5-10mm with the spacing of the top edge of right support seat；
(4) ultrasonic bonding：The left support seat for offering the through-hole or the right support seat are first positioned over ultrasound
Between two applicators of wave soldering connection device, each applicator is respectively aligned to the pad of corresponding support base, to the left support
Seat or the right support seat apply ultrasonic activation, natural cooling so that are located at the left support seat or right support seat
Vibratory string and clamping plate between clamping plate is integrally welded, then welds the vibratory string of another support base, finally cuts off positioned at the support base
Outer extra vibratory string just completes the connection between vibratory string and the support base.
2. the connection method of vibratory string in a kind of type vibration wire earth pressure gauge according to claim 1, it is characterised in that：The folder
The distance between plate is 0.25mm, a diameter of 0.25mm of the through-hole.
3. the connection method of vibratory string in a kind of type vibration wire earth pressure gauge according to claim 1, it is characterised in that：Step
(4) in, welding pressure 14-18Mpa, bonding power 4000-4500W, weld amplitude are 18-20 μm, weld interval 1-
1.5s。
4. the connection method of vibratory string in a kind of type vibration wire earth pressure gauge according to claim 1, it is characterised in that：Step
(4) in, argon gas or helium are passed through to pad while welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969405.5A CN106563877B (en) | 2016-10-27 | 2016-10-27 | The connection method of vibratory string in a kind of type vibration wire earth pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969405.5A CN106563877B (en) | 2016-10-27 | 2016-10-27 | The connection method of vibratory string in a kind of type vibration wire earth pressure gauge |
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| CN106563877A CN106563877A (en) | 2017-04-19 |
| CN106563877B true CN106563877B (en) | 2018-10-16 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112414603B (en) * | 2020-12-01 | 2022-08-23 | 交通运输部公路科学研究所 | Application method of fixed concrete structure stress test system |
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| US5277356A (en) * | 1992-06-17 | 1994-01-11 | Rohm Co., Ltd. | Wire bonding method |
| US5603445A (en) * | 1994-02-24 | 1997-02-18 | Hill; William H. | Ultrasonic wire bonder and transducer improvements |
| CN202420727U (en) * | 2011-12-26 | 2012-09-05 | 杨波 | Long-acting clamping mechanism of vibrating-string type sensor string wire |
| CN205437480U (en) * | 2016-02-19 | 2016-08-10 | 广州市新栋力超声电子设备有限公司 | Ultrasonic wave pencil welding machine |
| CN205538037U (en) * | 2016-01-27 | 2016-08-31 | 王建美 | Vibrating wire type taseometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3430331A (en) * | 1963-09-30 | 1969-03-04 | Philips Corp | Apparatus and process for ultrasonically welding a wire to the surface of an object |
| CN1038352A (en) * | 1988-06-07 | 1989-12-27 | 三菱化成株式会社 | Zooming and capturing system with lighting light guide device |
| US5277356A (en) * | 1992-06-17 | 1994-01-11 | Rohm Co., Ltd. | Wire bonding method |
| US5603445A (en) * | 1994-02-24 | 1997-02-18 | Hill; William H. | Ultrasonic wire bonder and transducer improvements |
| CN202420727U (en) * | 2011-12-26 | 2012-09-05 | 杨波 | Long-acting clamping mechanism of vibrating-string type sensor string wire |
| CN205538037U (en) * | 2016-01-27 | 2016-08-31 | 王建美 | Vibrating wire type taseometer |
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| CN106563877A (en) | 2017-04-19 |
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