CN106403862A - Method and system for rapidly detecting dimensions of part through sensors - Google Patents
Method and system for rapidly detecting dimensions of part through sensors Download PDFInfo
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- CN106403862A CN106403862A CN201610913254.1A CN201610913254A CN106403862A CN 106403862 A CN106403862 A CN 106403862A CN 201610913254 A CN201610913254 A CN 201610913254A CN 106403862 A CN106403862 A CN 106403862A
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- control unit
- sensor
- accessory size
- quick detection
- control
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- General Physics & Mathematics (AREA)
- Automatic Assembly (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a method and system for rapidly detecting dimensions of a part through sensors, for automatically identifying and rejecting unqualified articles in a feeding phase of a part. The technical scheme is as follows: the multiple sensors are installed at control points of a working station, and signals of the multiple sensors are output to a control unit; height dimensions of the multiple sensors are confirmed and fixed through qualified sealing samples; and when an attachment surface of the part on the working station goes beyond a sensing scope, no signals of the sensors are displayed in the control unit as a result, and it is detected that the dimensions of the part are changed.
Description
Technical field
The present invention relates to a kind of detection method of accessory size and system, more particularly, to utilize high-precision sensor to part
The method and system that size is used for quickly detecting.
Background technology
It is frequently found during car load manufactures automobile body welding, punching press single-piece or welding point are spelled (particularly in base plate part
Forward and backward longeron assembly) size is unstable, can dialogue automobile body welding dimensional stability produce a very large impact.Dimensional discrepancy leads to
Consequence a lot, the lighter affects overall dimensions of a car quality of match, and severe one directly affects automatic assembly line and normally runs;Automatically in operation
When fixture inner sensor no signal, show that part clamping is not in place, fault stops line alarm to production line immediately, and subsequent treatment will take for
Much unnecessary maintenance man-hourses.For the serious consequence avoiding this problem to bring, the method generally adopting is to check sample rack
100% measures parts, or three coordinates 100% measure, but high cost, excessive cycle, big in the fast beat of automatic production line
During batch production, substantially can not enable.It can be said that for this technical problem, there is presently no fast simple has
The solution of effect.Meanwhile, this technical problem, is also to realize that industry 4.0 is full-automatic to be produced it is necessary to take the lead in solving is the most real
Border problem.
In existing known production size quality control process, mainly there are following four kinds of common methods, but these methods
All restricted by factors such as cost, place, time, manpower, the scope of applications:
1. three-dimensional coordinates measurement is a kind of off-line measurement method, and testee is placed in three-dimensional coordinates measurement space, can obtain quilt
Survey the coordinate position of each measuring point on object, the spatial value put according to these, be computed obtaining testee physical dimension,
Shape and position, are applicable to single-piece, sub-unit and assembly, but the cycle of this measuring method are longer, and equipment is huge, dimension
Shield high cost is it is impossible to be incorporated to automatic production line;
2.Inline On-line Measuring Method is that the end that laser vision sensor is fixed on high precision machines human arm is entered
Line program automatic detection, by controlling the pose conversion in space for the robot, vision sensor can reach space successively and refer to
Measurement position, the image information of collection space characteristics point, and pass through data processing and coordinate transform, obtain this point and sit in vehicle body
Three-dimensional coordinate data under mark system, is primarily adapted for use in assembly detection.Equipment used in this method costly, maintenance cost
Height, after being incorporated to automatic production line, response speed is slower, as the inspection of rear road it is impossible to stop dimensional defects from occurring it is impossible to reject
Problem part;
3. white light (blue light) measurement is online, off-line measurement method, by optical measuring head, coordinates Opticell automatization to survey
Amount system, accurately provides the full surface of part, border, the measurement data in hole, surface point and section line, is primarily adapted for use in four-door two-lid
Single-piece measures.Costly, maintenance cost is high for the measuring apparatus that this method uses;Automatic production line cannot be incorporated to;
4. sample rack measurement is a kind of off-line measurement method, by being positioned with RPS benchmark, with measurers such as clearance gauge, dial gauges
Record is measured to the gap of housing specified location, flatness, judges whether weldment is qualified, mainly for detection of four two
The gap of lid, Qian Houwei, front and rear windows and taillight, flatness matching status.But the frequency of this metering system is relatively low, error is relatively
Greatly, artificial operation can have a direct impact to measurement result, and operate time-consuming more it is impossible to be incorporated to automatic production line.
Sensor is a kind of detection means, can experience measured information, and by the information experienced, according to a set pattern
Rule is transformed to the information output of the signal of telecommunication or other desired forms, meeting the transmission of information, processs, storage, display, record and
Control etc. requires.It has the characteristics that miniaturization, digitized, intellectuality, multifunction, systematization, networking.
Content of the invention
The brief overview of one or more aspect given below is to provide the basic comprehension to these aspects.This general introduction is not
The extensive overview of all aspects contemplating, and it is also non-to be both not intended to identify the key or decisive key element of all aspects
Attempt to define the scope of any or all aspect.Its unique purpose is intended to provide the one of one or more aspects in simplified form
A little concepts think the sequence of more detailed description given later.
The present invention be solve above-mentioned technical problem, there is provided a kind of method by sensor quick detection accessory size and
System, the part feeding stage just can automatic identification reject defective work, be to control in advance during fully-automatic production
The error correction method of the generation of off-dimension product, can apply to automatization's automobile body welding production line of whole automobile manufacture industry
Upper it is also possible to be applied to have on the automated manufacturing welding production line of similar technique characteristic with auto industry.
The technical scheme is that:Present invention is disclosed a kind of method by sensor quick detection accessory size,
Including:
Multiple sensors are installed on the control point of station, the signal output of multiple sensors is to control unit;
By qualified approved sample part, the height dimension of multiple sensors is confirmed and fixed;
When the binding face of the part on station exceeds sensing scope, sensor can be led to be shown as in a control unit no believing
Number, accessory size is detected and change.
According to an embodiment of the method by sensor quick detection accessory size for the present invention, the precision of sensor and
The control tolerance of main locating element matches.
According to an embodiment of the method by sensor quick detection accessory size for the present invention, the control point bag of station
Include the control point of the maximum control point of part deformation amount or the follow-up size receiving publicity.
According to an embodiment of the method by sensor quick detection accessory size for the present invention, it is informed of a case outside control unit
Alert unit, just points out alarm signal by alarm unit when accessory size is detected and changing.
According to an embodiment of the method by sensor quick detection accessory size for the present invention, control unit is independent
External equipment, or the automatic control unit that production line carries.
Present invention further teaches a kind of system of quick detection accessory size, including:
Multiple sensors, are arranged on the control point of station, and height dimension is confirmed by qualified approved sample part and fixed;
Control unit, the signal output of multiple sensors is to control unit;
Wherein, when the binding face of the part on station exceeds sensing scope, sensor can be led to show in a control unit
For no signal, accessory size is detected and change.
One embodiment of the system of the quick detection accessory size according to the present invention, the precision of sensor and main locating element
Control tolerance match.
One embodiment of the system of the quick detection accessory size according to the present invention, the control point of station includes part deformation
The maximum control point of amount or the control point of the follow-up size receiving publicity.
One embodiment of the system of the quick detection accessory size according to the present invention, the external alarm unit of control unit, when
Accessory size is detected and change and just point out alarm signal by alarm unit.
One embodiment of the system of the quick detection accessory size according to the present invention, control unit is independent external sets
Standby, or the automatic control unit that production line carries.
Present invention contrast prior art has following beneficial effect:The solution of the present invention has two features, and the first is passed through
Choosing the measurement qualified parts approved by standard is object of reference, carries out transducer calibration under the conditions of particular technology on this basis
And approved sample;Its two be in part feeding or single-piece just complete man-hour just can quick detection and judge its whether size qualification (or
There is change of shape), if it is suitable for proceeding follow-up automated production process.During automated production, enter in advance
Row size error correction, thus rejecting defective work in time, reduce it may happen that the equipment that caused due to accessory size deviation therefore
The reprocessing of barrier, its essence is just fast and accurately to be detected before part is further processed, it is to avoid unnecessary fault
With reprocess.
Compared to conventional art, the present invention just quick detection can go out size not using high-precision sensor in part upper part
Certified products or the situation finding part shape change, can reject defective work, after minimizing, road returns in time in automated production
Work and equipment fault, reduce and reprocess cost.
The high-precision sensor that the present invention adopts and control unit are with low cost, purchase channel variation, and maintenance cost is low.
The present invention passes through to adjust the model of high-precision sensor, species, installation site and precision, that is, control accuracy is with zero
The change of the margin of tolerance of part and machining accuracy and be adjusted flexibly, the range of application of the present invention can be made to extend to various automatic weldings
On producing line of delivering a child station, including size quick detection in feeding station, operation etc., simply handy.
Brief description
Fig. 1 shows the flow process of an embodiment of the method by sensor quick detection accessory size of the present invention
Figure.
Fig. 2 and Fig. 3 is of the detection method applying the present invention on the clamping fixture table of the front longitudinal assembly positioning of vehicle
The schematic diagram of example.
Fig. 4 shows the schematic diagram of an embodiment of the system of quick detection accessory size of the present invention.
Specific embodiment
After reading the detailed description of embodiment of the disclosure in conjunction with the following drawings, better understood when the present invention's
Features described above and advantage.In the accompanying drawings, each assembly is not necessarily drawn to scale, and has similar correlation properties or feature
Assembly be likely to be of same or like reference.
Fig. 1 shows the flow process of an embodiment of the method by sensor quick detection accessory size of the present invention.
Refer to Fig. 1, the detailed description of each step of detection method to the present embodiment is presented herein below.
Step S1:Multiple sensors are installed on the control point of station, the signal output of this multiple sensor is to controlling list
Unit.
Precision is important performance indications of sensor, and it is be related to whole measuring system certainty of measurement one
Important step.The precision of sensor is higher, and its price is more expensive, therefore, as long as the precision of sensor meets whole measuring system
Required precision just can be it is not necessary to select too high.In the present embodiment, generally choose the control tolerance phase with main locating element
Join.Preferably, being placed on the maximum control point of part deformation amount, or on the follow-up high control point of size attention rate.
Step S2:By qualified approved sample part, the height dimension of multiple sensors is confirmed and fixed.
Step S3:When the binding face of the part on station exceeds sensing scope, some or certain several sensors can be led to
It is shown as no signal in a control unit, thus accessory size is detected to there occurs change.
Sensor is shown as no signal it is meant that size does not fall within the range of tolerance range, is defective work.Preferably,
Just alarm signal can be pointed out in the external alarm unit of control unit when detecting after accessory size changes by alarm unit
Number.Such as it is lit by alarm lamp, remind and reject defective work.
On common feeding clamping fixture table, independent control unit can be installed, can be in full-automatic production line feeding work
Position or the specific station with detection function, install high-precision sensor, and signal are accessed automatic control in the production line unit,
Effect same can be reached.
The detection side of the present invention is further illustrated as a example the clamping fixture table of front longitudinal assembly positioning shown in by Fig. 2 and Fig. 3
Method.Incorporated by reference to Fig. 2 and Fig. 3, front longitudinal assembly is positioned on clamping fixture table 5, and yielding region 6 size often fluctuates, and works as undulate quantity
Exceed tolerance range 3mm and then later process and quality are produced with impact, the purpose of design is rejecting dimension overproof before automated production
Parts and components.Design 3 control point that the high-precision sensor 1,2,3 installing additional is placed on the maximum zone line of longeron deflection
Above (plane both sides are taken respectively to select 1 point to correspond to sensor 2,3, side selects 1 point to correspond to sensor 1, by this 3 points
Obvious part deformation or torsion can be detected), choosing sensing height is the high-precision sensing of 3mm (consistent with part tolerance band)
Device is being installed, and with qualified approved sample part as standard, contact surface declines 1.5mm install sensor height and (generally highly sets
It is set to the distance that approved sample part declines 1/2 tolerance range).When part sensitive face exceeds 1.5mm, sensor is non-inductive, i.e. display does not have
There is part, signal transmission reports an error to controller 4, to tell operator's part deformation to exceed tolerance with this it is impossible to use
In follow-up automated production.After changing certified products, sensor has sensing, shows part and then continues to produce.Such design,
Efficiently avoid unqualified reaching the standard grade, it is to avoid reach the standard grade due to transporting the deformation part leading to, be automated production efficiently, in order
Operation provides guarantee.
Understand from above-mentioned method, the system that the detection method of the present invention is relied on is as shown in figure 4, include multiple sensings
Device 7, control unit 8, preferably also include alarm unit 9.Multiple sensors 7 are arranged on the control point of station, height dimension
Confirmed by qualified approved sample part and fixed.The signal output of multiple sensors 7 is to control unit 8.When the part on station
Binding face exceed sensing scope, sensor 7 can be led to be shown as no signal in control unit 8, accessory size is detected and send out
Changing.Change just by alarm unit 9 prompting alarm signal when accessory size is detected.
Precision is important performance indications of sensor, and it is be related to whole measuring system certainty of measurement one
Important step.The precision of sensor is higher, and its price is more expensive, therefore, as long as the precision of sensor meets whole measuring system
Required precision just can be it is not necessary to select too high.In the present embodiment, generally choose the control tolerance phase with main locating element
Join.The control point of station includes the control point of the maximum control point of part deformation amount or the follow-up size receiving publicity.
Control unit 8 is independent external equipment, or the automatic control unit that production line carries.
Although said method being illustrated and is described as a series of actions for making explanation simplify, it should be understood that and understand,
These methods are not limited by the order of action, because according to one or more embodiments, some actions can occur in different order
And/or with from depicted and described herein or not shown herein and description but it will be appreciated by those skilled in the art that other
Action concomitantly occurs.
Of this disclosure being previously described is provided to be for so that any person skilled in the art all can make or use this public affairs
Open.Various modification of this disclosure all will be apparent from for a person skilled in the art, and as defined herein general
Suitable principle can be applied to the spirit or scope without departing from the disclosure for other variants.Thus, the disclosure is not intended to be limited
Due to example described herein and design, but should be awarded and principle disclosed herein and novel features phase one
The widest scope causing.
Claims (10)
1. a kind of method by sensor quick detection accessory size is it is characterised in that include:
Multiple sensors are installed on the control point of station, the signal output of multiple sensors is to control unit;
By qualified approved sample part, the height dimension of multiple sensors is confirmed and fixed;
When the binding face of the part on station exceeds sensing scope, sensor can be led to be shown as no signal in a control unit,
Accessory size is detected to change.
2. the method by sensor quick detection accessory size according to claim 1 is it is characterised in that sensor
The control tolerance of precision and main locating element matches.
3. the method by sensor quick detection accessory size according to claim 1 is it is characterised in that the control of station
System point includes the control point of the maximum control point of part deformation amount or the follow-up size receiving publicity.
4. the method by sensor quick detection accessory size according to claim 1 is it is characterised in that control unit
External alarm unit, just points out alarm signal by alarm unit when accessory size is detected and changing.
5. the method by sensor quick detection accessory size according to claim 1 is it is characterised in that control unit
It is independent external equipment, or the automatic control unit that production line carries.
6. a kind of system of quick detection accessory size is it is characterised in that include:
Multiple sensors, are arranged on the control point of station, and height dimension is confirmed by qualified approved sample part and fixed;
Control unit, the signal output of multiple sensors is to control unit;
Wherein, when the binding face of the part on station exceeds sensing scope, sensor can be led to be shown as in a control unit no
Signal, detects accessory size and changes.
7. the system of quick detection accessory size according to claim 6 is it is characterised in that the precision of sensor and master are fixed
The control tolerance of position part matches.
8. the system of quick detection accessory size according to claim 6 is it is characterised in that the control point of station includes zero
The maximum control point of part deflection or the control point of the follow-up size receiving publicity.
9. the system of quick detection accessory size according to claim 6 is it is characterised in that the outer list taking alarm of control unit
Unit, just points out alarm signal by alarm unit when accessory size is detected and changing.
10. the system of quick detection accessory size according to claim 6 is it is characterised in that control unit is independent
External equipment, or the automatic control unit that production line carries.
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Cited By (1)
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CN107623274A (en) * | 2017-09-28 | 2018-01-23 | 福建森达电气股份有限公司 | For assembling the device of switch cubicle |
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Application publication date: 20170215 |