CN103884251A - Focal length measuring device for irregular workpiece in process of laser machining - Google Patents

Focal length measuring device for irregular workpiece in process of laser machining Download PDF

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Publication number
CN103884251A
CN103884251A CN201410112370.4A CN201410112370A CN103884251A CN 103884251 A CN103884251 A CN 103884251A CN 201410112370 A CN201410112370 A CN 201410112370A CN 103884251 A CN103884251 A CN 103884251A
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height gauge
gauge
angle square
measuring
contact
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CN201410112370.4A
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CN103884251B (en
Inventor
曹宇
魏鑫磊
李峰平
余德格
余婷婷
冯爱新
朱德华
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Wenzhou University
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Wenzhou University
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Abstract

The invention provides a focal length measuring device for an irregular workpiece in the process of laser machining. The focal length measuring device comprises a base, a height gauge, a height gauge rotating assembly, a lifting and sliding block and a telescopic angle ruler measuring head assembly. The height gauge is vertically and fixedly installed on the height gauge rotating assembly and can be driven by the height gauge rotating assembly to rotate. The lifting and sliding block is installed on the height gauge in a sleeved mode and can slide up and down along the height gauge. The telescopic angle ruler measuring head assembly comprises a fixed arm and a measuring arm. The fixed arm is fixedly installed on the height gauge and is parallel to the height gauge. The measuring arm comprises an angle gauge clamping piece, a first-level angle gauge rod, a second-level angle gauge rod and a contact pressure head. The focal length measuring device for the irregular workpiece in the process of laser machining is a spatial, all-dimensional and duplex-measurement combination measuring tool and is combined with the measurement principle of a traditional height gauge and angle gauge, and the functions of the focal length measuring device break through the limitations of the traditional height gauge and angle gauge in measuring orientation, measuring range and measuring material. Besides, the focal length measuring device is compact in structure, convenient to disassemble and assemble, simple in use and high in measuring accuracy.

Description

The Laser Processing focal length measuring equipment of irregular workpiece
Technical field
The invention belongs to field of laser processing, be specifically related to a kind of Laser Processing focal length measuring equipment of irregular workpiece.
Background technology
Laser processing technology be the characteristic of utilizing laser beam and matter interaction to material (comprising metal and nonmetal) cut, a special kind of skill of welding, surface treatment, punching, micro-processing etc.Laser Processing has been widely used in the national economy important departments such as automobile, electronics, electrical equipment, aviation, metallurgy, machine-building as advanced manufacturing technology, to improving the quality of products, labour productivity, robotization, pollution-free, reduce material consumption etc. and play more and more important effect.
In laser processing procedure, before carrying out laser beam flying, generally all requires measurement in advance to know the focal length of the everywhere on laser scanning manufacturing path, focus on all the time surface of the work when making laser beam flying campaign.For regular shape workpiece, as rectangular parallelepiped, spheroid, cylinder etc., the traditional measurement method of focal length is all mainly to measure based on height gauge and bevel protractor principle, as long as the focal length numerical value of some unique point of measuring workpieces surface, all the other positions to be measured can be calculated according to the regular geometric shapes of workpiece.
But, for the irregular workpiece of some special shape, special size, especially without special-shaped free curve surface work pieces or the amalgamation workpiece of Accurate Curve-fitting equation, must start first being processed intensive measurement machining path focal length everywhere in advance.For this abnormal workpieces, adopt common survey instrument measurement operation very inconvenient, even cannot realize accurately and measuring.Such as, for large-scale erose processing work, itself be difficult for maybe can not moving, in the time adopting laser to process (as welding, cladding, quenching etc.) to it, because measurer installation site is limited, and cause conventional gauges cannot measure owing to measuring the restriction of orientation and measurement range; For low situation after high before processing work, the height gauge of conventional gauges is all horizontal measuring head structure, can cause it can occur to measure interference, and gauge head does not detect position below; If workpiece to be machined is flexible material (due to the machinery-free contact force characteristic of Laser Processing, very general in technical field of laser processing), the pressure contact metering system of conventional gauges, can make workpiece deformation, measures thereby also cannot realize accurately.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, a kind of Laser Processing focal length measuring equipment of irregular workpiece is provided; This Laser Processing focal length measuring equipment can be realized the Measurement accuracy of the Laser Processing focal length to irregularly shaped workpiece, hard or flexible material workpiece.
The present invention is achieved through the following technical solutions:
A Laser Processing focal length measuring equipment for irregular workpiece, comprises base, height gauge, height gauge rotary components, lifting slipping block and the bevel protractor gauge head assembly that stretches;
Described base is to have the platform structure as level reference take bottom surface; Described height gauge rotary components is arranged on the top of base, the rotation center axis of height gauge rotary components and bottom surface normal parallel;
Described height gauge is vertically fixedly mounted on height gauge rotary components, with bottom surface normal parallel, can drive the rotation of doing 0~360 degree by height gauge rotary components;
Described lifting slipping block is sleeved on height gauge, can be along the upper and lower slippage of height gauge, and glide direction and bottom surface normal parallel;
On described lifting slipping block, be provided with the position locking mechanism for fixing lifting slipping block and height gauge relative position;
The flexible gauge head assembly of described bevel protractor comprises fixed arm and gage beam;
Described fixed arm is fixedly mounted on lifting slipping block, and parallel with height gauge, makes the flexible gauge head assembly entirety of bevel protractor to be driven and to be done upper and lower sliding motion by lifting slipping block;
Described gage beam comprises angle square fastener, angle square one-level bar, angle square secondary bar and contacts pressure head;
Described angle square fastener is connected with fixed arm by articulated manner, and gage beam entirety can be rotated around fixed arm within the scope of 0~180 degree, and its center of rotation axis is perpendicular to bottom surface normal;
On described angle square fastener, angular sensor and display are also installed, described angular sensor and display are respectively used to measure the angle between display measurement arm and the positive dirction of height gauge;
One end of described angle square one-level bar is fixed on angle square fastener, and the other end is connected with angle square secondary bar, and described angle square secondary bar can be realized along the inner chamber slippage of angle square one-level bar the telescopic variation of gage beam length; Described angle square one-level bar, angle square secondary bar are marked with graduated scale;
Described contact pressure head is fixed on the end of angle square secondary bar, and described contact pressure head comprises semicircle pressure arm and optoelectronic switch, and is connected to the contact of semicircle pressure arm end portion;
On described contact, be set with spring, contact end is provided with contact-making switch, and when contact testee surface, while making spring compressed, contact-making switch sends switching value signal;
The light emitting source of described optoelectronic switch and the light-receiving device relative inside surface bottom that is arranged on semicircle pressure arm and the medial surface of contact respectively, in the time that the light between light emitting source and light-receiving device is blocked by testee, optoelectronic switch sends switching value signal.
Preferably, described height gauge rotary components comprises rotating disc, turbine and worm gear train and driving-disc, on described driving-disc, hand cranking handle is installed; Described driving-disc is connected with rotating disc by turbine and worm gear train; Described rotating disc extends the upper surface of base, and described driving-disc extends the side of base; Described height gauge is vertically fixedly mounted on rotating disc.
The present invention has following beneficial effect:
1, the present invention is a kind of space omnidirectional, duplex measurement combination measurer, combine the measuring principle of traditional height gauge and bevel protractor, its function has broken through traditional height gauge and bevel protractor in multiple limitations of measuring on orientation, measurement range, measurement material, and compact conformation, easy accessibility, use is simple and easy, measuring accuracy is high.
2, traditional height gauge is in the time measuring different azimuth, need mobile or rotating base again to lay measurer, can bring like this floor installation space requirement large, lay the base fiducial error (base riding position in fact all can have roughness and flatness error) that inconvenience and multiple exchanging position cause; The present invention has increased rotary display stand structure on base, by driven by shaking dish, make height gauge and the bevel protractor gauge head assembly integral-rotation that stretches, need not again lay base, changed the deficiency of traditional height gauge firm banking, without transposition cause fiducial error, adjust more convenient.
3, sounding rod of the present invention is the flexible gauge head modular construction of bevel protractor, one fixed arm is fixedly mounted on lifting slipping block, and with bottom surface normal parallel, another arm is gage beam, gage beam entirety can be rotated around fixed arm within the scope of 0~180 degree, like this gage beam can with on set angle tiltedly, level or lower tilted direction stretch out, this structure has solved traditional height gauge sounding rod fixing horizontal and has stretched out, and causes abnormal workpieces to measure the problem of interfering; And the flexible gauge head assembly of bevel protractor adopts digital display mode, facilitates reading, accurately reliable; Lifting slipping block carries locking mechanism, thereby the relative position of the flexible gauge head assembly of bevel protractor and height gauge can lock, and is convenient for measuring.
4, in the present invention, the gage beam of the flexible gauge head assembly of bevel protractor has adopted the scalable rod-type with rule, makes like this measurement range greatly increase.
5, the gauge head position of gage beam front end of the present invention, has adopted contact pressure head structure, in the time measuring hard material, guarantees that contact contacts with surface of the work well, measures accurately reliable; The simultaneously design of semicircle pressure arm, can also make to contact pressure head and can walk around near the microspike obstacle (practical especially while measuring shallow trench) point to be measured, measures local zonule and have the workpiece of low shape facility after front height.
6, in the present invention, the inner end of semicircle pressure arm has adopted the design of optoelectronic switch, in the time that measured workpiece is thin slice or flexible material, once contact contacts with surface of the work, the slight curves of workpiece triggers optoelectronic switch at once, obtain when pre-test numerical value, the workpiece deformation of workpiece under gauge head External Force Acting has been considered in its measurement, and result is more accurate.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure diagram of the Laser Processing focal length measuring equipment of irregular workpiece of the present invention;
Fig. 2 is the structural drawing of height gauge rotary components;
Fig. 3 is the structural drawing of the flexible gauge head assembly of bevel protractor;
Fig. 4 is the structural drawing of contact pressure head;
Fig. 5 is the measuring principle figure of Laser Processing focal length measuring equipment;
Fig. 6 is the instrumentation plan of high rear low situation before workpiece;
In figure, the implication of each label is as follows:
Base 1, height gauge 2, height gauge rotary components 3, lifting slipping block 4, fixed arm 5, gage beam 6, rotating disc 31, turbine and worm gear train 32, driving-disc 33, hand cranking handle 34, lock-screw 41, angle square fastener 61, angle square one-level bar 62, angle square secondary bar 63, contact pressure head 64, semicircle pressure arm 65, optoelectronic switch 66, contact 67, spring 68.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
As Figure 1-4, the invention provides a kind of Laser Processing focal length measuring equipment of irregular workpiece, comprise base 1, height gauge 2, height gauge rotary components 3, lifting slipping block 4 and the bevel protractor gauge head assembly that stretches;
Described base 1 is for to have the platform structure as level reference take bottom surface, and surfaceness is less than Ra12.5, below by the level reference of base 1 referred to as bottom surface.
Described height gauge 2 is vertically fixedly mounted on height gauge rotary components 3, with bottom surface normal parallel, can drive the rotation of doing 0~360 degree by height gauge rotary components 3.Described height gauge rotary components 3 is arranged on the top of base 1, and it is the rotation center axis of height gauge rotary components 3 and the normal parallel of bottom surface 1 that the relative installation position of the two requires;
A kind of preferred structure of described height gauge rotary components 3 is: comprise rotating disc 31, turbine and worm gear train 32 and driving-disc 33, on described driving-disc 33, hand cranking handle 34 is installed; Described driving-disc 33 is connected with rotating disc 31 by turbine and worm gear train 32.Described rotating disc 31 extends the upper surface of base 1, and height gauge 2 is vertically fixedly mounted on rotating disc 31; Described driving-disc 33 extends the side of base 1.When operation, rotate hand cranking handle 34 by hand, can drive rotating disc 31 to rotate, and then drive height gauge 2 to rotate.Certainly, height gauge rotary components 3 can also adopt other structures, such as gear set transmission etc., as long as it can drive height gauge 2 to do the rotation of 0~360 degree.
Described lifting slipping block 4 is sleeved on height gauge 2, can be along height gauge slippage Shang Xia 2, and its glide direction and bottom surface normal parallel; On described lifting slipping block 4, be provided with the position locking mechanism with height gauge 2 relative positions for fixing lifting slipping block 4, this position locking mechanism can be realized by two lock-screws 41 that screw in lifting slipping block 4, can certainly adopt other latch mechanisms, the present invention does not limit this.
The flexible gauge head assembly of described bevel protractor comprises fixed arm 5 and gage beam 6, described fixed arm 5 is fixedly mounted on lifting slipping block 4, and parallel with height gauge 2, that is with bottom surface normal parallel, make the flexible gauge head assembly entirety of bevel protractor to drive and do upper and lower sliding motion by lifting slipping block 4.
Described gage beam 6 comprises angle square fastener 61, angle square one-level bar 62, angle square secondary bar 63 and contacts pressure head 64.
Described angle square fastener 61 is connected with fixed arm 5 by articulated manner, and gage beam 6 entirety can be rotated around fixed arm 5 within the scope of 0~180 degree, and its center of rotation axis is perpendicular to bottom surface normal.
On described angle square fastener 61, angular sensor and display are installed, described angular sensor and display are respectively used to measure the angle between display measurement arm 6 and the positive dirction of height gauge 2.
One end of described angle square one-level bar 62 is fixed on angle square fastener 61, and the other end is connected with angle square secondary bar 63, and described angle square secondary bar 63 can be realized along the inner chamber slippage of angle square one-level bar 62 telescopic variation of gage beam 6 length; Described angle square one-level bar 62, angle square secondary bar 63 are marked with graduated scale, can obtain telescopic variation amount; Add telescopic variation amount according to angle square fastener 61, angle square one-level bar 62, angle square secondary bar 63 and the length sum that contacts pressure head 64, can computation and measurement put the length of angle square fastener 61 and the pin joint of fixed arm 5.
Described contact pressure head 64 is fixed on the end of angle square secondary bar 63, described contact pressure head 64 comprises semicircle pressure arm 65 and optoelectronic switch 66, and be connected to the contact 67 of semicircle pressure arm 65 last portions, on described contact 67, be set with spring 68, be provided with contact-making switch, when contact testee surface, while making spring 68 compressed, contact-making switch sends switching value signal; The light emitting source of described optoelectronic switch 66 and the light-receiving device relative inside surface bottom that is arranged on semicircle pressure arm 65 and the medial surface of contact 67 respectively, it can be 0.1mm~10mm that distance between light emitting source and light-receiving device requires according to measuring accuracy, in the time that the light between light emitting source and light-receiving device is blocked by testee, optoelectronic switch sends switching value signal.
The process that adopts above-mentioned Laser Processing focal length measuring equipment to carry out focometry is:
First, rotate by hand cranking handle 34, driven rotary dish 31 and height gauge 2 rotate to correct position; Regulate afterwards height gauge 2 near the height of tested point, the gage beam 6 of the flexible gauge head assembly of last adjusting angle chi, contact 67 on its contact pressure head 64 is contacted with tested point, now read the height value H of height gauge 2, the angle value α of the flexible gauge head assembly of bevel protractor; Calculate by height value H and angle value α, can obtain the height of tested point on workpiece, and then realize the measurement to processing focal length.
As shown in Figure 5, by height value H and angle value α, the concrete grammar that calculates tested point height Z on workpiece is: Z=H+Lcos α, and wherein L is the length of gage beam 6, angle value α is the angle between gage beam 6 and the positive dirction of height gauge 2.
As shown in Figure 6, in figure, two measurement point T1, T2 are low situation after front height, adopt traditional survey instrument to interfere, and cannot measure; Measure easily the wherein height Z1=H1+L1cos α of measurement point T1 and adopt Laser Processing focal length measuring equipment of the present invention to realize 1, the height Z2=H2+L2cos α of measurement point T2 2, between 2, difference in height is Z1-Z2.The situation of Fig. 6 is also applicable to not exist the situation of datum mark, such as when workpiece reference plane and Laser Processing focal length measuring equipment of the present invention lay reference plane not at same surface level in the situation that, as long as any on selection workpiece is as altitude datum point arbitrarily, might as well be made as Z1, then the height value Z2 that follow-up measurement point records, by calculating Z1-Z2, can obtain on workpiece other positions with respect to the difference in height of altitude datum point.
It is apparent to one skilled in the art that the present invention can change into various ways, and such change is not thought and departed from the scope of the present invention.All so apparent modifications of the technician to described field, within being included in the scope of this claim.

Claims (2)

1. a Laser Processing focal length measuring equipment for irregular workpiece, is characterized in that, comprises base, height gauge, height gauge rotary components, lifting slipping block and the bevel protractor gauge head assembly that stretches;
Described base is to have the platform structure as level reference take bottom surface; Described height gauge rotary components is arranged on the top of base, the rotation center axis of height gauge rotary components and bottom surface normal parallel;
Described height gauge is vertically fixedly mounted on height gauge rotary components, with bottom surface normal parallel, can drive the rotation of doing 0~360 degree by height gauge rotary components;
Described lifting slipping block is sleeved on height gauge, can be along the upper and lower slippage of height gauge, and glide direction and bottom surface normal parallel;
On described lifting slipping block, be provided with the position locking mechanism for fixing lifting slipping block and height gauge relative position;
The flexible gauge head assembly of described bevel protractor comprises fixed arm and gage beam;
Described fixed arm is fixedly mounted on lifting slipping block, and parallel with height gauge, makes the flexible gauge head assembly entirety of bevel protractor to be driven and to be done upper and lower sliding motion by lifting slipping block;
Described gage beam comprises angle square fastener, angle square one-level bar, angle square secondary bar and contacts pressure head;
Described angle square fastener is connected with fixed arm by articulated manner, and gage beam entirety can be rotated around fixed arm within the scope of 0~180 degree, and its center of rotation axis is perpendicular to bottom surface normal;
On described angle square fastener, angular sensor and display are also installed, described angular sensor and display are respectively used to measure the angle between display measurement arm and the positive dirction of height gauge;
One end of described angle square one-level bar is fixed on angle square fastener, and the other end is connected with angle square secondary bar, and described angle square secondary bar can be realized along the inner chamber slippage of angle square one-level bar the telescopic variation of gage beam length; Described angle square one-level bar, angle square secondary bar are marked with graduated scale;
Described contact pressure head is fixed on the end of angle square secondary bar, and described contact pressure head comprises semicircle pressure arm and optoelectronic switch, and is connected to the contact of semicircle pressure arm end portion;
On described contact, be set with spring, contact end is provided with contact-making switch, and when contact testee surface, while making spring compressed, contact-making switch sends switching value signal;
The light emitting source of described optoelectronic switch and the light-receiving device relative inside surface bottom that is arranged on semicircle pressure arm and the medial surface of contact respectively, in the time that the light between light emitting source and light-receiving device is blocked by testee, optoelectronic switch sends switching value signal.
2. the Laser Processing focal length measuring equipment of irregular workpiece according to claim 1, is characterized in that, described height gauge rotary components comprises rotating disc, turbine and worm gear train and driving-disc, on described driving-disc, hand cranking handle is installed; Described driving-disc is connected with rotating disc by turbine and worm gear train; Described rotating disc extends the upper surface of base, and described driving-disc extends the side of base; Described height gauge is vertically fixedly mounted on rotating disc.
CN201410112370.4A 2014-03-19 2014-03-19 The Laser Processing focal length measuring equipment of irregular workpiece Active CN103884251B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109211047A (en) * 2018-08-24 2019-01-15 江西洪都航空工业集团有限责任公司 A kind of guided missile horizontal measurement height gauge
CN109835986A (en) * 2019-03-08 2019-06-04 南京市市政设计研究院有限责任公司 A kind of efficient water-purifying ecological floating bed suitable for city flood discharge river
CN110745572A (en) * 2019-10-30 2020-02-04 江苏省如高高压电器有限公司 Isolator assembly production system

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CN103056531A (en) * 2013-01-14 2013-04-24 苏州领创激光科技有限公司 Automatic zooming method and automatic zooming device for laser cutting machine
CN203744878U (en) * 2014-03-19 2014-07-30 温州大学 Irregular workpiece laser processing focal length measuring device

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Publication number Priority date Publication date Assignee Title
JPH0961115A (en) * 1995-08-28 1997-03-07 Sokkia Co Ltd Ball gauge bar and optical length measuring device
KR20040084309A (en) * 2003-03-27 2004-10-06 사단법인 고등기술연구원 연구조합 Position measuring observer device laser head for welding
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109211047A (en) * 2018-08-24 2019-01-15 江西洪都航空工业集团有限责任公司 A kind of guided missile horizontal measurement height gauge
CN109835986A (en) * 2019-03-08 2019-06-04 南京市市政设计研究院有限责任公司 A kind of efficient water-purifying ecological floating bed suitable for city flood discharge river
CN110745572A (en) * 2019-10-30 2020-02-04 江苏省如高高压电器有限公司 Isolator assembly production system

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Application publication date: 20140625

Assignee: INSTITUTE OF LASER AND OPTOELECTRONICS INTELLIGENT MANUFACTURING, WENZHOU University

Assignor: Wenzhou University

Contract record no.: X2020330000103

Denomination of invention: Focal length measuring device for irregular workpiece in laser processing

Granted publication date: 20160330

License type: Common License

Record date: 20201125