CN109211091B - Special tool for detecting surface difference of vehicle body glass - Google Patents
Special tool for detecting surface difference of vehicle body glass Download PDFInfo
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- CN109211091B CN109211091B CN201811237935.6A CN201811237935A CN109211091B CN 109211091 B CN109211091 B CN 109211091B CN 201811237935 A CN201811237935 A CN 201811237935A CN 109211091 B CN109211091 B CN 109211091B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/28—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring contours or curvatures
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Abstract
The invention discloses a special tool for detecting the surface difference of vehicle body glass, which solves the problems of poor detection accuracy, low detection efficiency and the like of the traditional vehicle body glass surface difference. The technical scheme includes that the device comprises a checking fixture base and is characterized in that a clamping plate is arranged above the checking fixture base, a plurality of capacitor measuring heads are mounted on the clamping plate, the bottom surface of the clamping plate is provided with an arc surface corresponding to the top surface of a workpiece profile, the end part of the clamping plate is fixed on the checking fixture base through a base plate, and an electrode base plate corresponding to the bottom surface of the workpiece profile is further arranged below the clamping plate; the base of the checking fixture is also provided with a plurality of clamping devices used for tightly attaching the electrode base plates to the molded surface of the workpiece. The invention has the advantages of simple structure, simple and convenient operation, high detection efficiency, quick feedback realization, interference resistance, good repeatability, high accuracy and precision and good adaptability, and is suitable for surface difference detection of the arc-shaped automobile body glass.
Description
Technical Field
The invention relates to a detection tool for a product profile.
Background
In the field of automobile manufacturing, in order to ensure the product quality, the surface difference of the produced automobile body glass needs to be detected, and the method is divided into the following steps according to the measurement mode in the prior art: contact measurement, non-contact measurement, and the like. These measurement methods have problems of complicated operation, large amount of data processing, low measurement accuracy, and the like.
The contact measurement is to use a measuring tool to manually and directly measure the thickness of multiple points on the glass surface of the vehicle body, and then calculate the surface difference. In terms of accuracy and repeatability, the angle or parallelism of the tool usage can have a severe impact on the accuracy and repeatability of the data. Each tool is limited by its category, size, shape.
The non-contact measurement is not easy to damage the surface of the automobile body glass, and large errors caused by the action of the contact generating force of the measuring tool can be avoided. The common use is inductance type measurement and laser measurement, but inductance type measuring tool can not satisfy the detection demand under certain occasions, especially to the automobile body glass that has the arcwall face, the fixed of two electrodes at automobile body glass both sides is difficult, and the gauge head easily receives the interference, leads to when the actual operation to detect the precision not high. The laser measuring tool has low limit on measurement and weak internal clearance measurement capability.
In view of this, how to rapidly design a detection method with a simpler structure and a faster speed has become a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problems and provides a special tool for detecting the surface difference of the glass of the automobile body, which has the advantages of simple structure, simplicity and convenience in operation, high detection efficiency, capability of realizing quick feedback, interference resistance, good repeatability, high accuracy and precision and good adaptability, and is suitable for detecting the surface difference of the glass of the automobile body.
The technical scheme includes that the device comprises a checking fixture base, wherein a clamping plate is arranged above the checking fixture base, a plurality of capacitor measuring heads are arranged on the clamping plate, the bottom surface of the clamping plate is provided with an arc surface corresponding to the top surface of a workpiece profile, the end part of the clamping plate is fixed on the checking fixture base through a base plate, and an electrode base plate corresponding to the bottom surface of the workpiece profile is further arranged below the clamping plate; the base of the checking fixture is also provided with a plurality of clamping devices used for tightly attaching the electrode base plates to the molded surface of the workpiece.
The seat plate and the checking fixture base are fixed through screws.
The clamping device comprises a plurality of end part clamping devices used for enabling the end parts of the electrode backing plate to be clung to the profile of the workpiece and a plurality of middle part clamping devices used for enabling the middle part of the electrode backing plate to be clung to the profile of the workpiece.
The end part clamping device comprises a clamping base, two symmetrical L-shaped clamping pieces and a clamping block, the lower end of the clamping base is fixed on the checking fixture base, the horizontal sections of the two symmetrical L-shaped clamping pieces are fixed at the upper end of the checking fixture base through adjusting screws respectively, the clamping block is arranged between the vertical sections of the two L-shaped clamping pieces, the two vertical sections and the rear end of the clamping block are connected together through adjusting bolts and adjusting nuts, and the front end of the clamping block is provided with a fillet used for placing the end part of the electrode base plate.
The middle clamping device comprises a supporting base, an adjusting seat and a supporting pin, the supporting base is fixed on the checking fixture base, the adjusting seat is fixed on the top surface of the supporting base, a threaded hole is formed in the top surface of the adjusting seat, external threads are engraved on the surface of the supporting pin, and the lower section of the supporting pin is located in the threaded hole of the adjusting seat.
And a support nut is sleeved on the support pin.
The top end of the supporting pin is a smooth cambered surface.
In order to solve the problems in the background art, the inventor considers that a non-contact capacitance distance sensor is adopted to detect the surface difference of the automobile body glass, and the capacitance sensor has the characteristics of good dynamic response characteristic, high sensitivity and precision, static and dynamic measurement and the like. In order to solve the problems of difficult installation and positioning of the capacitor measuring head and poor flexibility of a measuring part during measurement, the inventor designs an arc-shaped clamping plate and an electrode backing plate which are adaptive to the arc-shaped structure of automobile body glass, a plurality of capacitor measuring heads can be installed at different positions on the clamping plate as required, the detecting point is flexible and mobile, a workpiece profile (the automobile body glass to be detected) is fixed between the clamping plate and the electrode backing plate, different part data on the workpiece profile can be conveniently and synchronously measured, the positioning reliability of the capacitor measuring head is good, the measuring part can be flexibly controlled, and the accuracy is high. The distance of the point to be measured is subjected to data acquisition and transmission by the capacitor measuring head to the PC end one by one, the data of the acquired data point (excluding abnormal points) is integrated, the surface difference value can be obtained to form a plurality of curves and the curves are displayed at the PC end, and the automatic measurement, analysis and display are realized.
In order to improve the detection accuracy, the clamping plate and the electrode backing plate are very important to be tightly attached to the profile of the workpiece, and besides the arc design of the clamping plate and the electrode backing plate, the electrode backing plate needs to be upwards clung to the profile of the workpiece in order to overcome the action of gravity, so that the electrode backing plate needs to be positioned and clamped.
The horizontal sections of the two L-shaped clamping pieces in the end part clamping device are respectively fixed at the upper end of the checking fixture base through the adjusting screws, so that the two L-shaped clamping pieces can be adjusted in vertical height, the upward clamping degree can be locally adjusted according to the thickness of the profile of the workpiece, and the electrode base plate, the profile of the workpiece and the clamping plate are ensured to be tightly attached in the vertical direction; the two vertical sections are connected with the rear ends of the clamping blocks through the adjusting bolts and the adjusting nuts, the clamping blocks can rotate on the adjusting bolts to adjust proper angles through adjustment, the adjusting nuts are screwed down to adjust the distance between the two L-shaped clamping pieces, the clamping blocks are fixed on a certain set angle to adapt to the radians of different clamping parts on the profile of the workpiece, positioning and clamping are achieved, and the joint among the electrode base plate, the profile of the workpiece and the clamping plate is further guaranteed; the front end of the clamping block is provided with a fillet used for placing the end part of the electrode backing plate, the end parts of the electrode backing plate and the workpiece profile are just placed on the fillet, and the limiting and the positioning are realized in the horizontal direction.
Considering that the profile of a workpiece is positioned and clamped from the end part, but the problem that the middle part is not tightly attached to the clamping plate and the electrode backing plate possibly under the influence of gravity is solved, the inventor also provides a middle clamping device for supporting and clamping the middle part, adopts the supporting pin to be matched with the screw hole on the adjusting seat, and can conveniently adjust the vertical height of the supporting pin by using the supporting nut of the outer sleeve, thereby realizing the jacking and clamping action on the middle part of the electrode backing plate. The top end of the supporting pin is a smooth cambered surface, so that the supporting pin can be effectively clamped and is also suitable for a local cambered surface, and damage or deformation caused by overlarge local pressure on the molded surface of a workpiece is avoided.
Has the advantages that:
the invention designs a special tool for detecting the surface difference of the glass of the vehicle body based on the non-contact capacitance distance sensing principle, the capacitor measuring head is combined with the clamping plate, the measurement of multi-azimuth and different types of surface differences can be realized, the repeated disassembly and assembly are avoided, the detection point can be flexibly arranged, the electrode backing plate is tightly attached to the surface of the workpiece, the effective clamping and positioning are realized, the anti-interference performance is good, the detection accuracy and the repeatability are good, the detection efficiency is high, the rapid feedback can be realized by matching with a PC (personal computer), the special tool is suitable for the surface difference detection of products which have the arc-shaped curved surfaces and need to be rapidly operated and processed, and the data.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Figure 2 is a schematic view of the mounting of the workpiece profile on the clamping plate.
Fig. 3 is a schematic view of the structure of the end clamp.
Fig. 4 is a schematic structural view of the middle clamping device.
The device comprises a test tool base 1, a test tool base 2, a clamp plate 3, a workpiece profile 4, a capacitor measuring head 5, an electrode backing plate 6, a seat plate 6, an end clamping device 7, a clamping base 7.1, an L-shaped clamping piece 7.2, a vertical section 7.21, a horizontal section 7.22, a clamping block 7.3, a fillet 7.31, an adjusting bolt 7.4, an adjusting nut 7.5, an adjusting screw 7.6, a middle clamping device 8.1, a supporting base 8.2, an adjusting base 8.21, a threaded hole 8.3, a supporting nut 8.4, a supporting pin 8.41, an external thread 8.42 and an arc surface.
Detailed Description
The invention is further explained below with reference to the drawings in which:
referring to fig. 1 and 2, a clamping plate 2 is arranged above a checking fixture base 1, a plurality of capacitor measuring heads 4 are inserted into the clamping plate 2, the bottom surface of the clamping plate 2 is provided with a cambered surface corresponding to the top surface of a workpiece profile 3, the end part of the clamping plate 2 is fixed with a seat plate 6, the seat plate 6 is fixed on the checking fixture base 1 through screws, and the seat plate 6 can be detached from the checking fixture base 1 by detaching the screws; an electrode pad 5 corresponding to the bottom surface of the workpiece profile 3 is arranged below the clamping plate 2; the checking fixture base 1 is further provided with a plurality of clamping devices used for enabling the electrode base plates 5 to be tightly attached to the molded surface of the workpiece.
The clamping devices comprise a plurality of end clamping devices 7 for tightly attaching the ends of the electrode backing plate 5 to the workpiece profile 3 and a plurality of middle clamping devices 8 for tightly attaching the middle of the electrode backing plate 5 to the workpiece profile 3.
Referring to fig. 3, the end clamping device 7 comprises a clamping base 7.1, two symmetrical L-shaped clamping pieces 7.2 and a clamping block 7.3, the lower end of the clamping base 7.1 is fixed on the checking fixture base 1, the horizontal sections 7.22 of the two symmetrical L-shaped clamping pieces 7.2 are respectively fixed on the upper end of the checking fixture base 1 through adjusting screws 7.6, and the vertical height of the two L-shaped clamping pieces 7.2 can be adjusted through the adjusting screws 7.6; establish between the vertical section 7.21 of two L shape clamping pieces 7.2 and press from both sides tight piece 7.3, link together two vertical sections 7.21 and the rear end of pressing from both sides tight piece 7.3 through adjusting bolt 7.4 and adjusting nut 7.5, the front end of pressing from both sides tight piece 7.3 is equipped with the ladder groove 7.31 that is used for placing electrode backing plate 5 tip.
The middle clamping device 8 comprises a supporting base 8.1, an adjusting seat 8.2, a supporting nut 8.3 and a supporting pin 8.4, the supporting base 8.1 is fixed on the checking fixture base 1, the top surface of the supporting base 8.1 is fixed with the adjusting seat 8.2, the top surface of the adjusting seat 8.2 is provided with a threaded hole 8.21, the surface of the supporting pin 8.4 is provided with an external thread 8.41, the lower section of the supporting pin is positioned in the threaded hole 8.21 of the adjusting seat 8.2, the top end of the supporting pin is a smooth cambered surface 8.42, and the supporting pin 8.4 is further sleeved with the supporting nut 8.3.
The using method comprises the following steps:
(1) firstly loosening screws of the seat plate 6 and the gauge base 1, taking down the seat plate 6 and the clamping plate 2, and inserting a plurality of capacitor measuring heads 4 to set positions on the clamping plate 2;
(2) turning over the clamping plate 2 to enable the cambered surface of the clamping plate to face upwards, placing the workpiece profile 3 (car body glass) to be tested on the cambered surface of the clamping plate 2 to enable the workpiece profile to be tightly attached, covering the workpiece profile 3 with an electrode backing plate 5, and keeping the cambered surfaces of the three parts corresponding to each other in a fitting state;
(3) turning the clamping plate 2 again to enable the arc surface of the clamping plate to face downwards and be just arranged above the clamping device, enabling the end part of the electrode backing plate 5 to be just arranged in a stepped groove 7.31 of a clamping block 7.3 of the end part clamping device 7, and screwing down the base plate 6 and a screw hole on the checking fixture base 1 for aligning;
(4) adjusting the end clamp 7: the vertical height of the L-shaped clamping pieces 7.2 is adjusted through the adjusting screws 7.6, then the clamping blocks 7.3 are pulled out at proper angles, the adjusting nuts 7.5 are controlled to clamp the two L-shaped clamping pieces 7.2, and the angle positioning of the clamping blocks 7.3 is kept, so that the end parts of the electrode base plate 5, the workpiece profile 3 and the clamping plates 2 are attached;
(5) adjusting the middle clamping device 7: and the supporting nut 8.3 is rotated to enable the supporting pin 8.4 to vertically move along the threaded hole 8.21 of the adjusting seat 8.2 until the cambered surface 8.41 at the upper end of the supporting pin 8.4 is jacked and pressed on the electrode base plate 5, so that the middle parts of the electrode base plate 5, the workpiece profile 3 and the clamping plate 2 are attached, and the preparation work before detection is completed.
During detection, the electrode pad 5 is used as the other electrode, the capacitor measuring head 4 can rapidly acquire a plurality of distance signals at a time, repeated disassembly and assembly are avoided, the distance signals are converted into direct-current voltage through the change rate of capacitance, the direct-current voltage output is output in a waveform diagram mode and is compared with an ideal waveform diagram, a plurality of data are simultaneously displayed at the PC end and can be further compared with a preset ideal waveform value, the ideal waveform value is exceeded or reduced, a response alarm is given out, feedback is made, the processing process after data acquisition is the prior art, and detailed description is omitted.
After the detection is finished, the base plate 6 and the screw of the detection tool base 1 are loosened again, the clamping plate 2 and the electrode base plate 5 are taken down, the new molded surface 3 of the tool to be detected can be replaced, and the operation process is repeated.
Claims (4)
1. A special tool for detecting the surface difference of vehicle body glass comprises a detection tool base and is characterized in that a clamping plate is arranged above the detection tool base, a plurality of capacitor measuring heads are arranged on the clamping plate, the bottom surface of the clamping plate is provided with a cambered surface corresponding to the top surface of a workpiece profile, the end part of the clamping plate is fixed on the detection tool base through a base plate, and an electrode base plate corresponding to the bottom surface of the workpiece profile is further arranged below the clamping plate; the checking fixture base is also provided with a plurality of clamping devices for tightly attaching the electrode base plate to the molded surface of the workpiece;
the clamping device comprises a plurality of end part clamping devices for clinging the end parts of the electrode backing plate to the profile of the workpiece and a plurality of middle part clamping devices for clinging the middle part of the electrode backing plate to the profile of the workpiece;
the end part clamping device comprises a clamping base, two symmetrical L-shaped clamping pieces and a clamping block, the lower end of the clamping base is fixed on the checking fixture base, the horizontal sections of the two symmetrical L-shaped clamping pieces are respectively fixed at the upper end of the checking fixture base through adjusting screws, the clamping block is arranged between the vertical sections of the two L-shaped clamping pieces, the two vertical sections are connected with the rear end of the clamping block through adjusting bolts and adjusting nuts, and the front end of the clamping block is provided with a fillet for placing the end part of the electrode backing plate;
the middle clamping device comprises a supporting base, an adjusting seat and a supporting pin, the supporting base is fixed on the checking fixture base, the adjusting seat is fixed on the top surface of the supporting base, a threaded hole is formed in the top surface of the adjusting seat, external threads are engraved on the surface of the supporting pin, and the lower section of the supporting pin is located in the threaded hole of the adjusting seat.
2. The special tool for detecting the surface difference of the glass of the car body as claimed in claim 1, wherein the seat plate and the detection tool base are fixed through screws.
3. The special tool for detecting the surface difference of the glass of the car body as claimed in claim 1, wherein a support nut is further sleeved on the support pin.
4. The special tool for detecting the surface difference of the glass of the vehicle body as claimed in claim 1 or 3, wherein the top end of the supporting pin is a smooth arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237935.6A CN109211091B (en) | 2018-10-23 | 2018-10-23 | Special tool for detecting surface difference of vehicle body glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811237935.6A CN109211091B (en) | 2018-10-23 | 2018-10-23 | Special tool for detecting surface difference of vehicle body glass |
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| CN109211091A CN109211091A (en) | 2019-01-15 |
| CN109211091B true CN109211091B (en) | 2021-01-08 |
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| CN201811237935.6A Active CN109211091B (en) | 2018-10-23 | 2018-10-23 | Special tool for detecting surface difference of vehicle body glass |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110220447A (en) * | 2019-07-15 | 2019-09-10 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of automobile skylight glass assembly electronic check tool |
| CN113654781B (en) * | 2021-08-16 | 2023-09-15 | 浙江吉利控股集团有限公司 | Device and system for verifying problem of frameless door window glass |
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| DE19642557A1 (en) * | 1995-10-20 | 1997-05-07 | Dea Spa | Measuring device for measuring components |
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