CN202928528U - Contact measuring head for thickness measurement of SMT web plate - Google Patents
Contact measuring head for thickness measurement of SMT web plate Download PDFInfo
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- CN202928528U CN202928528U CN 201220584286 CN201220584286U CN202928528U CN 202928528 U CN202928528 U CN 202928528U CN 201220584286 CN201220584286 CN 201220584286 CN 201220584286 U CN201220584286 U CN 201220584286U CN 202928528 U CN202928528 U CN 202928528U
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- guide rail
- probe
- air guide
- web plate
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Abstract
The utility model specifically relates to a contact measuring head for thickness measurement of an SMT web plate, which belongs to the field of a measure tool technology. The contact measuring head for thickness measurement of an SMT web plate comprises a housing, an air guide rail, a probe, a connecting piece, a high-resolution laser ruler, a displacement sensor, an air pipe connector and a data cable. The measuring head employs a contact measuring principle, which means the probe ball at the end of the probe vertical to the surface of the SMT web plate is contacted to the surface of the SMT web plate, the probe only possesses the freedom degree of up-and-down movement, which means the probe can only moves up and down, the weight of the probe itself is counteracted by an internal precise spring, the other end of the probe is connected with a high-resolution laser ruler vertical to the probe, and the displacement change of the probe at the vertical direction is detected in real time through an internal miniature laser displacement sensor.
Description
Technical field
The utility model belongs to the survey instrument technical field, is specifically related to a kind of SMT web plate thickness measuring contact measuring head.
Background technology
In SMT procedure for processing technique, measurement becomes the critical process of guaranteeing SMT following process quality for the supplied materials web plate.SMT supplied materials web plate due to thickness generally below 0.3mm, breadth usually more than 300mm * 300mm, the characteristics such as this web plate has all that material is thin, precision is high, breadth is large, high flexibility, material category are many.Along with the requirement of market to SMT web plate working (machining) efficiency and cost improves gradually, the breadth of SMT web plate is increasing, to its supporting professional measuring equipment, requires to guarantee to reduce as far as possible the equipment cost taken by themselves under enough measuring accuracy prerequisites.SMT supplied materials web plate does not generally all carry out follow-up Laser Processing, and the view picture web plate is without any hollow out machining feature, and surfacing is without obvious wrinkling.When carrying out thickness measure, only need to measure on the same plate of throwing the net some somes places thickness with preliminary judge this web plate thickness evenness and actual (real) thickness whether relatively nominal value have the situation such as overproof to get final product.
SMT field web plate thickness measurement device in the past, generally all adopt contactless gauge head to measure, this gauge head inside is equipped with the precise laser displacement transducer, the calibrated bolck that during measurement with thickness is first A is placed on measuring table, the height value that records laser displacement sensor light-emitting window criterion distance piece upper surface is h1, and this value is set as zero point.Calibrated bolck is removed again, the SMT web plate is placed on measuring table, recording the laser displacement sensor light-emitting window is h2 apart from SMT web plate height value, the thickness D=A+h1-h2 of measured SMT web plate.When adopting this measuring method that SMT web plate thickness is measured, no doubt feasible on principle, but there are the following problems:
One, SMT web plate starting material surface is often also unholiness, irregularly has some dusts, and this moment as employing laser displacement sensor are measured it, and these dusts can impact the laser beam transmit direction, thereby affect the stability of measuring accuracy;
Two, measuring equipment environment light of living in can exert an influence to the brightness of measurement point material surface, thus the remote effect measuring accuracy.
Three, SMT web plate raw material types is all many, except modal stainless steel in the past, also has the multiple different kinds materials such as nickel sheet, nickel alloy sheet, electroforming sheet.And in the SMT industry, web plate all needs to carry out the measurement of thickness in different manufacturing procedures, to improve quality monitoring in the web plate process.And the different operations of SMT web plate may produce the web plate of different surfaces characteristic, as electroforming surface, plate surface, polished surface, etched surfaces etc.The variation of material surface characteristic, show as similar " wrinkle " shape surperficial on micromechanism, this microstructure sizes often 10um even more among a small circle in, but be enough to the laser beam reflection angle is affected greatly, directly cause measuring accuracy to descend, be difficult to satisfy SMT web plate thickness high-acruracy survey demand.
Four, laser displacement sensor mostly is precise part, and especially high-precision laser bit shift displacement sensor is almost dependence on import entirely, and is expensive.
Impact due to the problems referred to above, cause being difficult to be controlled in 1um to SMT web plate thickness measure precision, generally only can be stabilized in 5um even larger, otherwise some web plate material surface integral is comparatively bright and clean, possible measuring accuracy can be better, but overall measurement accuracy and stability all can not satisfy the requirement of SMT web plate thickness measure precision 1um.In addition, satisfying reduction gauge head cost taken by themselves under the measuring accuracy prerequisite, be the generally expectation in SMT web plate thickness measure field.
The utility model content
SMT web plate thickness measuring contact measuring head disclosed in the utility model, solved well and adopted the unholiness and micromechanism impact on aspects such as measuring accuracy and Measurement sensibilities because of SMT web plate surface of laser displacement sensor measuring beam in contactless gauge head in the past, and avoid adopting high-accuracy laser displacement sensor, reduced the gauge head cost, for SMT web plate thickness measurement device provides a cost performance higher precision feeler.
To achieve these goals, the technical solution of the utility model is a kind of SMT web plate thickness measuring contact measuring head of design, comprises housing, air guide rail, probe, web member, high resolving power laser ruler, displacement transducer, gas-tpe fitting and data cable;
Wherein, housing is comprised of top cover, mounting cover and bottom, and the top of described mounting cover and bottom be at right angle setting top cover and bottom respectively, all has through hole on described top cover and bottom;
Described air guide rail leads core by air guide rail and the air guide rail guide pin bushing forms, and has mounting hole in described air guide rail guide pin bushing upright position, and it is square structure that described air guide rail is led core;
its annexation is: described air guide rail guide pin bushing is fixedly mounted on described mounting cover, described air guide rail is led the mounting hole that core passes the air guide rail guide pin bushing, described air guide rail is led core and is ventilated by gas-tpe fitting, the lower end that described air guide rail is led core is connected with probe, the end of described probe is passed the through hole of described bottom and is stretched out, the upper end of leading core at described air guide rail is connected with the high resolving power laser ruler by web member, in described top cover lower end, displacement transducer is installed, described data cable is connected with displacement transducer and the through hole that stretches out top cover enters control system with data transmission.
Also comprise being provided with precision spring, adopt precision spring to pass probe and be separately fixed at air guide rail and lead core bottom and bottom top.
Being provided with mount pad in described mounting cover rear end is used for fixing.
advantage of the present utility model and beneficial effect are: the utility model discloses a kind of SMT web plate thickness measuring contact measuring head, this gauge head adopts the contact type measurement principle, i.e. probe tips probe ball and SMT web plate Surface Contact by vertical and SMT web plate surface, probe only has unique degree of freedom that moves up and down, be that it only can move up and down, own wt is offset by inner precision spring, and the other end of probe is connecting the high resolving power laser ruler with the parallel installation of probe vertical direction, by the real-time detector probe of its Internal Small-scale laser displacement sensor change in displacement in vertical direction.In measuring process, the probe ball of probe tips always with SMT web plate Surface Contact, thereby guarantee in measuring process, change in displacement is determined by SMT web plate thickness fully in vertical direction, therefore can reflect very accurately, truly the thickness of SMT web plate self, and not affected by SMT web plate surface dirt.And how no matter ambient light shines if being closed, measured value is all to read in the sensor of gauge head inside, and not closed by ambient light affects.In addition, generally more than 500um, it only can contact the peak of upper micromechanism with SMT web plate Surface Contact due to the probe ball diameter of probe tips, and impact that can hand micromechanism self, truly reflects thickness and the even variation value of SMT web plate., by adopt this gauge head guaranteed high-precision requirement to the thickness measure of supplied materials web plate, duplicate measurements precision reach ± 1um is even less; Guaranteeing under the measuring accuracy prerequisite, avoiding adopting in traditional approach contactless measurement because SMT web plate surface dirt, environment light and surface microstructure cause launching the light beam error, directly having influence on the problems such as measuring accuracy and stability.Fully take into account the SMT industry to the detection demand of supplied materials web plate, namely require to guarantee under the high precision condition, reduce as far as possible equipment cost, equipment operating is convenient etc., is the product that SMT web plate thickness measure field precision feeler used provides simple in structure, cost performance is higher, more can meet the need of market.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is mounting cover of the present utility model and mount pad wiring layout;
Fig. 3 is the utility model fundamental diagram.
Wherein, 1-top cover; The 2-mounting cover; The 3-bottom; 4-air guide rail guide pin bushing; The 5-air guide rail is led core; The 6-probe; The 7-web member; 8-high resolving power laser ruler; The 9-displacement transducer; The 10-gas-tpe fitting; The 11-data cable; The 12-mount pad; The 13-precision spring.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described, following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1 to Figure 3, the concrete technical scheme of implementing of the utility model is: a kind of SMT web plate thickness measuring contact measuring head comprises housing, air guide rail, probe 6, web member 7, high resolving power laser ruler 8, displacement transducer 9, gas-tpe fitting 10 and data cable 11;
Wherein, housing is comprised of top cover 1, mounting cover 2 and bottom 3, and the top of described mounting cover 2 and bottom be at right angle setting top cover 1 and bottom 3 respectively, all has through hole on described top cover 1 and bottom 3;
Described air guide rail leads core 5 by air guide rail and air guide rail guide pin bushing 4 forms, and has mounting hole in described air guide rail guide pin bushing 4 upright positions, and described air guide rail is led core 5 and is square structure;
its annexation is: described air guide rail guide pin bushing 4 is fixedly mounted on described mounting cover 2, described air guide rail is led the mounting hole that core 5 passes air guide rail guide pin bushing 4, described air guide rail is led core 5 by gas-tpe fitting 10 ventilations, the lower end that described air guide rail is led core 5 is connected with probe 6, the end of described probe 6 is passed the through hole of described bottom 3 and is stretched out, the upper end of leading core 5 at described air guide rail is connected with high resolving power laser ruler 8 by web member 7, in described top cover 1 lower end, displacement transducer 9 is installed, described data cable 11 is connected with displacement transducer 9 and the through hole that stretches out top cover 1 enters control system with data transmission.
Also comprise being provided with precision spring 13, adopt precision spring 13 to pass probe 6 and be separately fixed at air guide rail and lead core 5 bottoms and bottom 3 tops.
Being provided with mount pad 12 in described mounting cover 2 rear ends is used for fixing.
Along with air guide rail lead core 5 air guide rail guide pin bushing 4 interior without the friction move up and down, read in real time probe 6 change in displacement in vertical direction by built-in miniature laser displacement transducer 9 simultaneously.Lead between core 5 and bottom 3 at air guide rail, adopting precision spring 13 to pass probe 6 is separately fixed at air guide rail and leads core 5 bottoms and bottom 3 tops, air guide rail is led core 5 when moving downward because of gravity, precision spring 13 can be offset the gravity effect that air guide rail is led core 5, and unnecessary gravity can keep probe 6 end probe balls and SMT web plate to measure Surface Contact.During measurement, on the vertical Z axis that is arranged on measuring equipment of gauge head, allow Z axis move vertically downward, until probe ball and the tested SMT web plate Surface Contact of probe 6 ends of gauge head bottom, record the displacement of Z axis displacement and probe 6 vertical direction this moment, measuring principle as shown in Figure 3, SMT web plate thickness measuring is fixed on Z axis with contact measuring head, measuring process is as follows:
1) first place the calibrated bolck with calibrated altitude under gauge head corresponding to measuring table, its height value is X0.
2) Z axis drive gauge head start bit Z0 in vertical direction begins to move downward, probe 6 is installed in measurement leads core 5 vertical moving downward under Action of Gravity Field with the air guide rail of high resolving power laser ruler 8, in the time of downward motion, compress the precision spring 13 under it, thereby offset a part of Action of Gravity Field, but because its total force is more bigger than spring reaction power, therefore before probe 6 end probe balls do not touch calibrated bolck, it is motionless that probe 6 is in minimum below always, and this moment, the reading value of miniature laser displacement transducer 9 correspondences was H0.
3) after calibrated bolck is encountered in probe 6 ends, the retroaction that makes progress increases, and probe 6 can move upward to H1, and will arrive Z1 position under Z axis this moment.This moment, H1 was set to measure zero point, and corresponding is that thickness of reference block is X0, and control system is write down this numerical value.
4) with Z axis from the Z1 Z0 position of moving back, calibrated bolck is removed, X1 thickness SMT web plate in placement, allow Z axis again move downward from Z0 position drive gauge head, until probe 6 touches the SMT web plate, and when allowing miniature laser displacement transducer 9 readings in gauge head just in time be in the HT1 position, Z axis stop motion immediately, move to Z2 position under Z-axis direction this moment.
5) by above-mentioned data, can calculate the difference in height △ Z=︱ Z2-Z1 ︱ between SMT web plate thickness after thickness of reference block, and measured SMT web plate thickness L=︱ X0-△ Z ︱.
When the SMT web plate is larger than calibrated bolck height X0, Z2＜Z1; When the SMT web plate than calibrated bolck height X0 hour, Z2 Z1;
The above is only preferential embodiment of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a SMT web plate thickness measuring contact measuring head, is characterized in that: comprise housing, air guide rail, probe (6), web member (7), high resolving power laser ruler (8), displacement transducer (9), gas-tpe fitting (10) and data cable (11);
Wherein, housing is comprised of top cover (1), mounting cover (2) and bottom (3), and the top of described mounting cover (2) and bottom be at right angle setting top cover (1) and bottom (3) respectively, all has through hole on described top cover (1) and bottom (3);
Described air guide rail leads core (5) by air guide rail and air guide rail guide pin bushing (4) forms, and has mounting hole in described air guide rail guide pin bushing (4) upright position, and it is square structure that described air guide rail is led core (5);
its annexation is: described air guide rail guide pin bushing (4) is fixedly mounted on described mounting cover (2), described air guide rail is led the mounting hole that core (5) passes air guide rail guide pin bushing (4), described air guide rail is led core (5) by gas-tpe fitting (10) ventilation, the lower end that described air guide rail is led core (5) is connected with probe (6), the end of described probe (6) is passed the through hole of described bottom (3) and is stretched out, the upper end of leading core (5) at described air guide rail is connected with high resolving power laser ruler (8) by web member (7), in described top cover (1) lower end, displacement transducer (9) is installed, described data cable (11) is connected with displacement transducer (9) and the through hole that stretches out top cover (1) enters control system with data transmission.
2. a kind of SMT web plate thickness measuring contact measuring head according to claim 1, it is characterized in that: also comprise being provided with precision spring (13), adopt precision spring (13) to pass probe (6) and be separately fixed at air guide rail and lead core (5) bottom and bottom (3) top.
3. a kind of SMT web plate thickness measuring contact measuring head according to claim 1 and 2 is characterized in that: be provided with mount pad (12) in described mounting cover (2) rear end and be used for fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584286 CN202928528U (en) | 2012-11-08 | 2012-11-08 | Contact measuring head for thickness measurement of SMT web plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584286 CN202928528U (en) | 2012-11-08 | 2012-11-08 | Contact measuring head for thickness measurement of SMT web plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202928528U true CN202928528U (en) | 2013-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220584286 Expired - Fee Related CN202928528U (en) | 2012-11-08 | 2012-11-08 | Contact measuring head for thickness measurement of SMT web plate |
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| Country | Link |
|---|---|
| CN (1) | CN202928528U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901439A (en) * | 2012-11-08 | 2013-01-30 | 昆山允可精密工业技术有限公司 | Contact measuring head for measuring thickness of surface mount technology (SMT) screen plate |
| CN104406527A (en) * | 2014-11-19 | 2015-03-11 | 苏州市欧康诺电子科技有限公司 | Height testing device |
-
2012
- 2012-11-08 CN CN 201220584286 patent/CN202928528U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901439A (en) * | 2012-11-08 | 2013-01-30 | 昆山允可精密工业技术有限公司 | Contact measuring head for measuring thickness of surface mount technology (SMT) screen plate |
| CN104406527A (en) * | 2014-11-19 | 2015-03-11 | 苏州市欧康诺电子科技有限公司 | Height testing device |
| CN104406527B (en) * | 2014-11-19 | 2017-10-20 | 苏州欧康诺电子科技股份有限公司 | A kind of high measure device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20151108 |
|
| EXPY | Termination of patent right or utility model |