CN102095344A - Method for carrying out high-precision three-coordinate measurement on workpieces - Google Patents
Method for carrying out high-precision three-coordinate measurement on workpieces Download PDFInfo
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- CN102095344A CN102095344A CN2009102633281A CN200910263328A CN102095344A CN 102095344 A CN102095344 A CN 102095344A CN 2009102633281 A CN2009102633281 A CN 2009102633281A CN 200910263328 A CN200910263328 A CN 200910263328A CN 102095344 A CN102095344 A CN 102095344A
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- pallet
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- line slideway
- base plate
- delivery platform
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Abstract
The invention discloses a method for carrying out high-precision three-coordinate measurement on workpieces, comprising the following steps of: fixing the workpieces on the upper surface of a follower fixture; positioning the follower fixture on which the workpieces are arranged on a worktable of a machine tool of a machining center; machining the workpieces; clamping the follower fixture by using an overhead hoist; hoisting the follower fixture with the workpieces; positioning the follower fixture on a linear guide rail conveying platform; conveying the linear guide rail conveying platform to a measuring position of a three-coordinate measuring machine along a linear guide rail; and carrying out three-coordinate measurement on the workpieces. In the method disclosed by the invention, that is to say, the method of sequentially positioning the follower fixture together with the workpieces with the worktable of the machine tool and the conveying platform, the accurate positioning of the workpiece is ensured and the favorable accurate positioning effect can be acquired. The method is simple and is free from repurchase of a noble machining center or complex reconstruction; and the high-standard measurement can be met at extremely-low cost.
Description
Technical field
The present invention relates to a kind of method of workpiece being carried out three-dimensional coordinates measurement.
Background technology
Three coordinate measuring machine is a kind of novel surveying instrument.It and traditional measurement instrument relatively can clampings, finish the measurement of a lot of sizes, comprise the measurement that a lot of traditional measurement instruments can't carry out, and more can import cad model, adopt a little on model and measure automatically.Its precision is influenced by each links such as the structure, material, drive system, grating chi of self.Its grating chi resolution is generally at 0.0005mm, and precision is subjected to a lot of such environmental effects such as temperature, humidity, vibrations at that time again during measurement.
To the workpiece that processes, such as diesel-engine body, do not having under the condition of three-dimensional coordinates measurement, only local bulk is carried out manual measurement, can form data deviation and incomplete like this.In order to reach the international high standard of accurate measurement, must all to carry out three-dimensional coordinates measurement to the diesel-engine body after each processing.According to the accuracy requirement of three coordinate measuring machine with in the world to the measurement requirement of diesel-engine body, when diesel-engine body is carried out three-dimensional coordinates measurement, need reach following standard:
(1) diesel-engine body and worktable are not separated to keep its accurate location;
(2) diesel-engine body and the worktable precision that is transferred to resetting on the measuring position of three coordinate measuring machine will reach 0.15mm;
(3) requirement is steadily little with vibrations in the process of transportation.
U.S. GE company is for satisfying above-mentioned requirements, and the two kinds of types of double change-table gantry machining center that adopt double change-table gantry machining center that German KLOB company produces and Italian INNSE BERARDI company to produce respectively are combined into FMC.See Fig. 1, this double change-table can separately use to move up and down and exchange.See Fig. 1, on the double change-table gantry machining center that U.S. GE company adopts two pallet changer A and B are arranged, A worktable and B worktable can separate front and back, also can separate moving up and down with machining center.
But the gantry machining center that the existing factory of China uses generally is the form that the double-workbench connection is hung.Two worktable of the gantry machining center of this form can only work in-process in the heart before and after separately, can not separate with machining center, therefore can't also can not realize the exchange of worktable and leave the handover of machining center.And the gantry machining center price is very expensive, and it is too big to reorganize the equipment purchase investment.But the diesel-engine body after each processing all will carry out the requirement of three-dimensional coordinates measurement and cannot change in order to reach international high standard.Therefore press for and adopting new method and corresponding device thereof to solve contradiction between reality and the requirement on the basis of existing equipment.
Summary of the invention
The purpose of this invention is to provide a kind of gantry machining center of common worktable that adopts also can be to the method for performing high precision three-dimensional coordinates measurement for workpiece.
The technical scheme that realizes the object of the invention is a kind of method to performing high precision three-dimensional coordinates measurement for workpiece, has following steps:
1. workpiece is fixed on the upper surface of pallet;
The pallet that 2. workpiece will be installed is positioned on the platen of machining center;
3. by machining center the workpiece on the platen is processed;
4. clamp pallet with handling apparatus, pallet is sling together with workpiece, pallet is positioned on the line slideway delivery platform then;
The line slideway delivery platform that 5. will be positioned with pallet is carried the measuring position that arrives three coordinate measuring machine along line slideway;
6. the line slideway delivery platform is positioned at the measuring position of three coordinate measuring machine;
7. by three coordinate measuring machine workpiece is carried out three-dimensional coordinates measurement.
The pallet of step in 1. comprises base plate, and the plate body of base plate is provided with two location square cotters and two pilot holes that are positioned on the bottom surface.The table top of the platen of the machining center of step in 2. is provided with two inverted T shape grooves and is fixed on two location pin members at inverted T shape groove place;
On the line slideway delivery platform of step in 4., be provided with and two location square cotters of pallet width and two locating slots matching of the distance between the two thereof separately.Also be provided with two register pins that two two pilot holes on the base plate with pallet match on the line slideway delivery platform.
Step 4. in, the concrete grammar that pallet is positioned on the line slideway delivery platform is: make the left pin of the base plate of pallet fall into left locating slot, make the right-hand pin of base plate fall into right locating slot, make pallet by the prelocalization borehole jack of its base plate on the prelocalization pin, pallet is enclosed within on the register pin of back by the back pilot hole of its base plate.
The leading flank of the line slideway delivery platform of step in 4. is provided with extension forward, and this extension is provided with through hole.Described line slideway is provided with the pilot hole that the through hole with the line slideway delivery platform cooperatively interacts at place, the measuring position of three coordinate measuring machine.By line slideway carry the situation of the measurement position that arrive three coordinate measuring machine under together with workpiece pallet, latch is passed through hole and pilot hole and the line slideway delivery platform is positioned on the line slideway with the mechanical pin device, and be positioned at the place, measuring position of three coordinate measuring machine.
The present invention has positive effect: (1) adopts the inventive method, successively guarantee the accurate location of workpiece with worktable and the pinpoint method of delivery platform with pallet and the indiscrete mode of workpiece, the workpiece and the indiscrete method of worktable that adopt when replacing using the machining center of double crossing over workbench, can obtain well accurate locating effect, method is simple, do not need to purchase again expensive machining center and need not complicated transformation yet, satisfied high-level measurement with extremely low cost.When (2) being positioned at pallet on the platen among the present invention, made full use of the inverted T shape groove on the existing machining center platen, simple, high efficiency operate.(3) among the present invention when workpiece is transferred on the measuring position of three coordinate measuring machine, position with latch again, satisfied the requirement of the precision of resetting.(4) among the present invention, three coordinate measuring machine and line slideway are carried out the construction on integral quakeproof basis.This kind arrangement and method for construction can overcome gene basis distortion, local unbalance loading and cause three coordinate measuring machine measuring error and with many influences.
Description of drawings
Fig. 1 is a U.S. GE company employing method synoptic diagram.
Fig. 2 is the inventive method synoptic diagram.
Fig. 3 is the elevational schematic view of the used pallet of the present invention.
Fig. 4 is the schematic top plan view of platen of the present invention.
Fig. 5 for the inventive method with line slideway and on the line slideway delivery platform workpiece be transported to the three-dimensional coordinates measurement machine room from machining center carry out instrumentation plan.
Fig. 6 is support, line slideway delivery platform and the line slideway plan structure synoptic diagram in the inventive method.
Embodiment
(embodiment 1)
See Fig. 1 to Fig. 6,, have 7 steps the method for performing high precision three-dimensional coordinates measurement for workpiece:
1. step is that workpiece 1 is fixed on the upper surface of pallet 3.Fixed form between workpiece 1 and the pallet 3 has multiple, and the method for Cai Yonging is in the present embodiment: with a plurality of bolts and corresponding pressing plate, nut and rubber blanket etc. workpiece 1 is being fixed on the upper surface of pallet 3.Workpiece 1 does not separate in the process of whole processing, transmission and measurement with pallet 3, with the position that guarantees workpiece any skew does not take place.
In the step subsequently, pallet 3 just arrives the measuring position of three coordinate measuring machine 5 after through three accurate location and installation together with workpiece 1.
2. step is to the first time location and installation of pallet 3 together with workpiece 1, and this step is with on the platen 21 of pallet 3 together with the workpiece 1 location and installation work in-process heart 2.The platen 21 of machining center 2 is provided with position accurate inverted T shape groove 21-1,21-2, and the width of each groove and the error of the distance between the adjacent slot are not more than 0.01mm.If therefore the location square cotter of pallet 3 is positioned in inverted T shape groove 21-1, the 21-2 of platen 21, with the location pin member that is fixed on inverted T shape groove place pallet 3 is positioned again, then owing to the exact position of inverted T shape groove and location pin member, pallet 3 has also just obtained accurate location.
3. this carry out step after locating for the first time and finishing, and on the platen 21 of the work in-process heart 2 workpiece 1 processed.
4. step is to the second time location and installation of pallet 3 together with workpiece 1, this step with pallet 3 together with workpiece 1 location and installation on line slideway delivery platform 5.
Line slideway delivery platform 5 is provided with position accurate localization groove 51-1,51-2, and the width of each groove and the error of the distance between the adjacent slot are not more than 0.01mm.If therefore the location square cotter of pallet 3 is arranged in the locating slot of line slideway delivery platform 5, with the register pin that is fixed on the delivery platform 5 pallet 3 is positioned again, then owing to the exact position of locating slot and register pin, pallet 3 has also just obtained accurate location.
Step 5., after finished aforementioned location, line slideway delivery platform 5 moved along line slideway 4, enter the Air Conditioning Facilities 7 of laying three coordinate measuring machine 6 after, arrive the measuring position of three coordinate measuring machine 6.The position that three pallets 3 and workpiece 1 are arranged among Fig. 5 is illustrated respectively in the position that position, handling that platen 21 places of machining center 2 process navigate to the position on the line slideway delivery platform 5 and carry out three-dimensional coordinates measurement from right to left.
When line slideway delivery platform 5 under the drive of motor 81, when the workpiece 1 of related pallet 3 was carried the place, measuring position that arrives three coordinate measuring machine 6 by line slideway 4, the front side of locating platform was fixed with slide block and touches travel switch and make control circuit control motor 81 stop operating.
Step 6., for the third time the location be when line slideway delivery platform 5 moves to the measuring position, line slideway delivery platform 5 is relocated on support 9, with guarantee the measurement process cathetus guide rail delivery platform 5 can not be offset.
At last, carry out step 7., carry out three-dimensional coordinates measurement by 6 pairs of workpiece of three coordinate measuring machine 1.
Above embodiment understands the method that makes workpiece can carry out three-dimensional coordinates measurement of the present invention specifically.As the qualification to embodiment of the present invention, but the scope of workpiece is not limited to diesel engine frame to above embodiment, and the method that three-dimensional coordinates measurement is carried out in all employing pallets and workpiece retinue location all falls into protection scope of the present invention.
Claims (4)
1. method to performing high precision three-dimensional coordinates measurement for workpiece is characterized in that having following steps:
1. workpiece (1) is fixed on the upper surface of pallet (3);
The pallet (3) that workpiece (1) 2. will be installed is positioned on the platen (21) of machining center (2);
3. by machining center (2) workpiece (1) on the platen (21) is processed;
4. clamp pallet (3) with handling apparatus, pallet (3) is sling together with workpiece (1), then pallet (3) is positioned on the line slideway delivery platform (5);
The line slideway delivery platform (5) that 5. will be positioned with pallet (3) is carried the measuring position that arrives three coordinate measuring machine (6) along the line slideway (41) that is installed on the support (9);
6. line slideway delivery platform (5) is positioned at that support (9) is gone up and the measuring position that is positioned at three coordinate measuring machine (6);
7. by three coordinate measuring machine (6) workpiece (1) is carried out three-dimensional coordinates measurement.
2. the method to performing high precision three-dimensional coordinates measurement for workpiece according to claim 1, it is characterized in that: the pallet (3) of step in 1. comprises base plate (31), the plate body of base plate (31) is provided be positioned on the bottom surface two location square cotters and four pilot holes, and the table top of the platen (21) of the machining center (2) of step in 2. is provided with two inverted T shape grooves and is fixed on two location pin members at inverted T shape groove place;
Step 2. in, the concrete grammar that pallet (3) is positioned on the platen (21) of machining center (2) is: make the left pin (31-1) of the base plate (31) of pallet (3) fall into left side inverted T shape groove (21-1), make the right-hand pin (31-2) of base plate (31) fall into right side inverted T shape groove (21-2), pallet (3) is enclosed within on the register pin (23-3) of right front pin member (23) by the right front pilot hole (32-3) of its base plate (31), pallet (3) is enclosed within on the register pin of left back pin member (22) by the left back pilot hole (32-2) of its base plate (31).
3. the method to performing high precision three-dimensional coordinates measurement for workpiece according to claim 2 is characterized in that: be provided with two locating slots that match with two location square cotter (31-1, the 31-2) width separately and the distance between the two thereof of pallet (3) on the line slideway delivery platform (5) of step in 4.; Also be provided with two register pins that two two pilot holes (32-1,32-4) on the base plate (31) with pallet (3) match on the line slideway delivery platform (5);
Step 4. in, the concrete grammar that pallet (3) is positioned on the line slideway delivery platform (5) is: make the left pin (31-1) of the base plate (31) of pallet (3) fall into left locating slot (51-1), make the right-hand pin (31-2) of base plate (31) fall into right locating slot (51-2), pallet (3) is enclosed within on the left front register pin (52-1) by the left front pilot hole (32-1) of its base plate (31), pallet (3) is enclosed within on the right back register pin (52-2) by the right back pilot hole (32-4) of its base plate (31).
4. according to the described method to performing high precision three-dimensional coordinates measurement for workpiece of one of claim 1 to 3, it is characterized in that: the leading flank of the line slideway delivery platform (5) of step in 4. is provided with mount pad (53), and this mount pad (53) is provided with through hole (54); Support (9) is provided with positioning seat (91), and the through hole (54) of its mount pad (53) was relative when this positioning seat (91) was located with the measuring position of line slideway delivery platform (5) arrival three coordinate measuring machine (6);
Step 6. in, by line slideway (41) carry the situation of the measuring position that arrive three coordinate measuring machine (6) under together with workpiece (1) pallet (3) at line slideway delivery platform (5), the through hole (54) that passes mount pad (53) with keeper inserts in the pilot hole of positioning seat (91) of support (9) again, and line slideway delivery platform (5) is positioned on the support (9), and be positioned at the place, measuring position of three coordinate measuring machine (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102633281A CN102095344A (en) | 2009-12-10 | 2009-12-10 | Method for carrying out high-precision three-coordinate measurement on workpieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102633281A CN102095344A (en) | 2009-12-10 | 2009-12-10 | Method for carrying out high-precision three-coordinate measurement on workpieces |
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| Publication Number | Publication Date |
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| CN102095344A true CN102095344A (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102633281A Pending CN102095344A (en) | 2009-12-10 | 2009-12-10 | Method for carrying out high-precision three-coordinate measurement on workpieces |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059820A (en) * | 2018-08-10 | 2018-12-21 | 江南大学 | Three coordinate multiplexing level auto measurers of one kind and method |
| CN110877222A (en) * | 2019-12-09 | 2020-03-13 | 宝鸡市捷龙商贸有限公司 | Positioning mechanism is used in electromechanical device processing |
-
2009
- 2009-12-10 CN CN2009102633281A patent/CN102095344A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059820A (en) * | 2018-08-10 | 2018-12-21 | 江南大学 | Three coordinate multiplexing level auto measurers of one kind and method |
| CN110877222A (en) * | 2019-12-09 | 2020-03-13 | 宝鸡市捷龙商贸有限公司 | Positioning mechanism is used in electromechanical device processing |
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Application publication date: 20110615 |