CN102607387B

CN102607387B - System for quantitatively measuring detecting hole and detecting surface of welding hole of white automobile body

Info

Publication number: CN102607387B
Application number: CN201110428579.8A
Authority: CN
Inventors: 徐旭明
Original assignee: NANJING 3-DIMENSION WELDING EQUIPMENT Co Ltd
Current assignee: NANJING 3-DIMENSION WELDING EQUIPMENT Co Ltd
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2014-07-09
Anticipated expiration: 2031-12-20
Also published as: CN102607387A

Abstract

The invention provides a system for quantitatively measuring a detecting hole and a detecting surface of a welding hole of a white automobile body. The system is characterized by comprising a quantitative detecting hole measuring device and a quantitative detecting surface measuring device, wherein a detecting bracket in the quantitative detecting face measuring device is mounted on a connection board in the quantitative detecting hole measuring device, so as to form a detecting mechanism in spatial X, Y and Z directions; and an A displacement sensor in the quantitative detecting surface measuring device, as well as a B displacement sensor and a C displacement sensor in the quantitative detecting hole measuring device are displacement sensors with the same type. The system disclosed by the invention has the advantages as follows: the cost is low and the measurement precision is high; and the system can measure a plurality of surfaces and points, is convenient, simple and easy to maintain, can monitor holes and surfaces to be detected of a working piece at any time in an on-line way, can record data and the like.

Description

Detection hole, automobile body-in-white sealing wire hole, detection faces quantitative measurement system

Technical field

What the present invention relates to is detection hole, automobile body-in-white sealing wire hole, detection faces quantitative measurement system, belongs to auto parts and components manufacturing equipment technical field.

Background technology

Some automobile factory, online the detection all of car load realized at the last station of Automobile Welding line, need to have 2 robots to detect vehicle body at present, and left and right is placed respectively one.In cost analysis, the cost accounting of 2 robots and measuring system is about 1,500,000, and cost of investment is excessive.Analyze from the coverage rate of check point, the time beat that robot detects a hole of vehicle body is 10 seconds, the time beat of a face that detects vehicle body is 5 seconds, and the beat that calculates separate unit according to the sealing wire of 150,000 of auto outputs is: day output: 250 days/annual=600/every day of 150,000/year ÷; Split run time output: ÷ 600/every day 2 order of classes or grades at school/every day=300/every order of classes or grades at school; Hourly output: 10 hours/every order of classes or grades at school=30/hour of 300/every order of classes or grades at school ÷; The single-piece output time: 30=120 seconds/part of 3600 seconds ÷ (single-piece beat) total efficiency; Single-piece beat (90% efficiency)=110 seconds; The actual measurement time: 110 seconds-50 seconds (upper and lower pieces time)=60 seconds; Measure the time beat in single-piece hole: 10 seconds/hole=6 of 60 seconds ÷ hole/seconds; Measure the time beat of single-piece face: 5 seconds/face=12 of 60 seconds ÷ face/seconds; Body in white need to be measured more than 100 measurement point according to complete vehicle quality actual requirement, more than 20 measurement point can only be measured within the 60S time by actual Liang Tai robot, the quantity maximum of actual spot of measurement can reach 30% of car load measurement point like this, cannot judge car load qualification rate comprehensively.

Analyze from the precision detecting, the repeatable accuracy of robot is in 0.5mm left and right, the repeatable accuracy of car load is at 0.5mm, detecting sensor precision is 0.05mm, the system-wide measuring accuracy of car load on-line measurement is: the precision of total system precision=robot repeatable accuracy+car load repeatable accuracy+sensor of on-line measurement, S=0.5+0.5+0.05=1.05mm, show that total system precision is 1.05mm, cannot meet the precision that car load is measured.Complete vehicle quality is adopted to offline inspection, measurement point has ensured the amount of measuring like this, but every car load detects and needs 2 ~ 3 days used times, generally to check 3 ~ 5, the Comparision of measuring is heavy, measure inefficiency, and need to there is professional manning, also to configure a three-dimensional coordinates measurement instrument, the principle of three-dimensional coordinates measurement instrument is that workpiece for measurement is placed in the measurement space of its permission, utilize gauge head at X, Y, accurately moves the space geometry size that obtains workpiece for measurement surface point in tri-directions of Z.Between a three-dimensional instrument market price about 8,000,000 ~ 1,000 ten thousand, although can reach the accuracy requirement that vehicle body car load detects, three coordinate machine is bulky, speed is low, and cost is high, environment (temperature, vibration) require the defects such as harsh, cannot meet the full monitoring to quality in automobile batch production.

Summary of the invention

What the present invention proposed is the quantitatively measuring device of detection hole, automobile body-in-white sealing wire hole, detection faces, and its object is intended to overcome the existing above-mentioned defect of prior art.

Technical solution of the present invention: it is characterized in that comprising detection hole quantitatively measuring device and detection faces quantitatively measuring device, wherein the Bracket for Inspection in detection faces quantitative testing device is arranged on the web joint detecting in the quantitative testing device of hole, form a testing agency in space X YZ direction, B displacement transducer in A displacement transducer in detection faces quantitative testing device and detection hole quantitative testing device, C displacement transducer same model displacement transducer used.

Advantage of the present invention: cost is low, measuring accuracy is high, and can measure multiple and point, easy to maintenance simple and easy, can carry out on-line monitoring, data recording etc. to each hole that need to detect of workpiece and face at any time.

Brief description of the drawings

Accompanying drawing 1 is the structural representation of detection faces quantitatively measuring device.

Accompanying drawing 2 is structural representations of displacement transducer.

Accompanying drawing 3 is the structural representations that detect hole quantitatively measuring device.

Accompanying drawing 4 is structural representations of detection hole, automobile body-in-white sealing wire hole, detection faces quantitative measurement system.

In figure 1 is pin, the 2nd, and guide, the 3rd, detect clamp, the 4th, displacement transducer, the 5th, Bracket for Inspection, the 6th, spring, the stroke distances that the distance of A section is displacement transducer, the change in displacement information that receives digital quantity by B point circular cone contact, its precision is 0.001mm, repeatable accuracy is 0.002mm.The 7th, web joint, the 8th, alignment pin, the 9th, XY slide unit fixed support, 10 (a) are B displacement transducers, 10 (b) are C displacement transducers, the 11st, L-type support.

Embodiment

Contrast accompanying drawing 1, detection faces quantitatively measuring device, its structure is to comprise pin 1, guide 2 detects clamp 3, A displacement transducer 4(model NS-WY01), Bracket for Inspection 5, spring 6; Wherein pin 1 is on guide 2, guide 2 is enclosed within and detects on clamp 3, spring 6 is housed in guide 2, play the effect of protection A displacement transducer contact, if do not put spring, the gravity that pin has self is so pressed on displacement transducer contact always, and the time has been grown, can there be certain wearing and tearing to displacement transducer contact, have influence on the precision of measurement.A displacement transducer 4 inserts to be surveyed in clamp 3, detects clamp 3 on Bracket for Inspection 5.

The course of work of detection faces quantitative measurment is that pin circular conical surface is by the contact to workpiece face, be created in displacement in the Z direction of space and change, by the acting force that is inserted in pin base in the guide sensor contact to displacement transducer being received to the numerical information of displacement.Guiding mechanism in the Z direction of space, by pin 1, guide 2, detects clamp 3, and Bracket for Inspection 5 forms, and Main Function is the detection and localization being used in the Z direction of space.The wherein manufacturability of pin, materials have requirement, and material is 40Cr, detects surface and will carry out modulation treatment, chromium plating, the benefit of doing is like this not easy to wear in long-time Detection task process, and durability is good.A displacement transducer 4 is model NS-WY01 type displacement transducers, and this products characteristics is: high precision, and error is little, high resolving power, expected life is long, and gliding smoothing is happy, degree of protection IP40.

Contrast accompanying drawing 2, the distance of A section is the stroke distances of A displacement transducer, receives the change in displacement information of digital quantity by B point circular cone contact, and its precision is 0.001mm, and repeatable accuracy is 0.002mm.The variation of logical superpotential variation generation current, as the numerical value of output signal, maximum displacement speed 10mm/s(max), the response time is 0.5 second/mm.In testing process, the numerical value that opposite is detected can be reacted on host computer clearly, and whether the face of this workpiece reaches in the margin tolerance of the theoretical value in Z direction, thereby carries out comprehensive judgement of the qualification rate to this workpiece by these numerical value.

Contrast accompanying drawing 3, the structure that detects hole quantitatively measuring device comprises

web joint 7, alignment pin 8, XY slide unit fixed support 9, B displacement transducer 10(a), C displacement transducer 10(b) and, L-type support 11, wherein on web joint 7, establish alignment pin 8, XY slide unit fixed support 9 is connected on L-type support 11, B displacement transducer 10(a) be fixed in the circular hole in the Y-direction of XY slide unit fixed support 9, guiding mechanism in composition space Y direction, C displacement transducer 10(b) be fixed in the circular hole on the directions X of XY slide unit fixed support 9, guiding mechanism in composition space X direction, the course of work be in Fig. 1 in the guiding mechanism in Z direction pin move to the position in the hole that will detect, in moving process, B displacement transducer contact on guiding mechanism in XY direction, the numerical information that the variation of the displacement of C displacement transducer contact in space X Y-direction produces, be reacted on host computer.Alignment pin 8 is in align mode, the effect of alignment pin 8 is to allow B displacement transducer in XY direction, the departure of the displacement of C displacement transducer in space X Y-direction is in 0 position, therebetween, alignment pin 8 is generally all lifted down, only, in maintenance process, just can use alignment pin, displacement transducer is carried out to school zero.

Contrast accompanying drawing 4, detection faces quantitatively detects with detecting hole and quantitatively detects relation, and the Bracket for Inspection in detection faces quantitative testing device is arranged on the web joint detecting in the quantitative testing device of hole, forms a testing agency in space X YZ direction.A displacement transducer in detection faces quantitative testing device and the B displacement transducer, the C displacement transducer that detect in the quantitative testing device of hole belong to same model displacement transducer, and principle of work is identical, but the object detecting is different.Work relationship between the two is all to obtain the process of quantitative variation by the movement of position.

The present invention can automatic on-line measurement and welding line become one, mainly formed by detection system part, the face to vehicle body all parts respectively, hole and physical dimension measure designed go out satisfactory fixture.Every sub-folder tool welding post can on-line measurement, on cost analyzes, and cost of investment is calculated every weld jig, and to increase price be 50,000 yuan of left and right, invests moderate.Analyze from the coverage rate of check point, weld jig can detect online to the parts assembly of each car load, more than the point that requirement is measured to parts assembly can reach 20 points, the quantity maximum of actual spot of measurement can reach 100% of car load measurement point like this, to the diurnal variation of complete vehicle quality, monthly variation, and the qualification rate of year variation can judge comprehensively.From accuracy of detection analysis, weld jig is that the parts assembly of car load is detected online, each hole to parts assembly and the precision of surface detection system can reach 0.01mm, the repeatable accuracy of product can reach 0.1mm, sensor accuracy is 0.05mm, and the system-wide measuring accuracy of parts assembly on-line measurement is:

Accuracy of detection+product repeatable accuracy+the sensor accuracy of the total system precision=weld jig of on-line measurement to parts assembly

S=0.01+0.1+0.05=0.16

Car load is finally measured without carrying out that again it is carried out to three-dimensional sampling observation, met the high precision that vehicle body car load requires in measuring process, and efficiency is also very high, can meet the requirement of the streamline production of automobile.Meanwhile, the part data that each station is measured in welding process can arrive host computer by Internet Transmission, understand in time the quality of soldering part, then process according to the data of each station measurement, can monitor timely product parts quality etc.

Claims

1. detection hole, automobile body-in-white sealing wire hole, detection faces quantitative measurement system, it is characterized in that comprising detection hole quantitatively measuring device and detection faces quantitatively measuring device, wherein the Bracket for Inspection in detection faces quantitative testing device is arranged on the web joint detecting in the quantitative testing device of hole, form a testing agency in space X YZ direction, B displacement transducer in A displacement transducer in detection faces quantitative testing device and detection hole quantitative testing device, C displacement transducer same model displacement transducer used, the structure of described detection faces quantitatively measuring device comprises pin, and guide detects clamp, A displacement transducer, Bracket for Inspection, spring, wherein pin is on guide, and guide is enclosed within and detects on clamp, and spring is housed in guide, and A displacement transducer inserts and detects in clamp, detects clamp on Bracket for Inspection, its course of work is that pin circular conical surface is by the contact to workpiece face, the displacement being created in the Z direction of space changes, by the acting force that is inserted in pin base in the guide sensor contact to displacement transducer being received to the numerical information of displacement, the precision of the change in displacement information of described A displacement transducer is 0.001mm, repeatable accuracy is 0.002mm, the variation of logical superpotential variation generation current, as the numerical value of output signal, maximum displacement speed 10mm/s, the response time is 0.5 second/mm, the structure of described detection hole quantitatively measuring device comprises

web joint, alignment pin, XY slide unit fixed support, B displacement transducer, C displacement transducer, L-type support, wherein on web joint, establish alignment pin, XY slide unit fixed support is connected on L-type support, B displacement transducer is fixed in the circular hole in the support bracket fastened Y-direction of XY slide unit, guiding mechanism in composition space Y direction, C displacement transducer is fixed in the circular hole on the support bracket fastened directions X of XY slide unit, guiding mechanism in composition space X direction, its course of work is the position that in the guiding mechanism in Z direction, pin moves to the hole that will detect, in moving process, B displacement transducer contact on guiding mechanism in XY direction, the numerical information that the variation of the displacement of C displacement transducer contact in space X Y-direction produces, be reacted on host computer, alignment pin is in align mode, the effect of alignment pin is to allow B displacement transducer in XY direction, the departure of the displacement of C displacement transducer in space X Y-direction is in 0 position, therebetween, alignment pin is generally all lifted down, only in maintenance process, just can use alignment pin, displacement transducer is carried out to school zero.