WO2015125165A1 - Modular positioning device - Google Patents

Modular positioning device Download PDF

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Publication number
WO2015125165A1
WO2015125165A1 PCT/IT2014/000051 IT2014000051W WO2015125165A1 WO 2015125165 A1 WO2015125165 A1 WO 2015125165A1 IT 2014000051 W IT2014000051 W IT 2014000051W WO 2015125165 A1 WO2015125165 A1 WO 2015125165A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning device
rotatable joint
modular positioning
articulated arm
cylinder
Prior art date
Application number
PCT/IT2014/000051
Other languages
French (fr)
Inventor
Luigi MANCUSO
Rodolfo BONASSO
Original Assignee
Pro - Design S.N.C.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pro - Design S.N.C. filed Critical Pro - Design S.N.C.
Priority to PCT/IT2014/000051 priority Critical patent/WO2015125165A1/en
Publication of WO2015125165A1 publication Critical patent/WO2015125165A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured

Definitions

  • the present invention refers to a modular positioning device.
  • an overturning and positioning device for positioning mechanical abutment components which can be, for example:
  • a modular positioning device is composed of a set of arms comprising different dedicated accessories arranged along an axis orthogonal to a surface, next to such calipers or control points.
  • US8174684 dealing with a modular system comprising a measuring head and composed of a central module equipped with interface elements connected to a recess obtained inside such central module and adapted to support a lighting module, a lens module, a mirror module, a camera module.
  • a central module equipped with interface elements connected to a recess obtained inside such central module and adapted to support a lighting module, a lens module, a mirror module, a camera module.
  • Such central module further comprises a mechanical assembling device adapted to support such measuring head.
  • Such modular system does not allow any rotation of such measuring head, rotation instead necessary to be able to reach a desired space configuration and does not allow an accurate repositioning of such measuring head, instead necessary to be able to pass from a standby configuration to a measuring configuration.
  • object of the present invention is solving the above prior art problems, by providing a modular positioning device capable of operating in a repetitive and accurate way, allowing to form configurations with wide movement of the arms.
  • a further object is providing a modular positioning device capable of being spatially repositioned, assuming different configurations and quickly passing from a passive to an active configuration and vice versa.
  • Figure 1 shows an axonometric view of a measuring bench dealing with an example of use and an embodiment of the modular positioning device according to the present invention
  • Figure 2 shows an exploded axonometric view dealing with an embodiment of the modular positioning device according to the present invention
  • Figure 3 shows an axonometric view of a fixed support dealing with the embodiment of Figure 2;
  • Figure 4 shows an axonometric view of a prismatic holed rod of a articulated arm dealing with the embodiment of Figure 2;
  • Figure 5 shows an axonometric view of a non- holed prismatic rod dealing with the embodiment of Figure 2;
  • Figure 6 shows an axonometric view of a rotatable joint dealing with the embodiment of Figure 2;
  • Figure 7 shows a plan view of the rotatable joint dealing with the embodiment of the previous Figure ;
  • Figure 8 shows a sectional view along line VIII-VIII of the previous Figure
  • Figure 9 shows an axonometric view of a supporting element dealing with the embodiment of Figure 2;
  • Figure 10 shows a plan view of the supporting element dealing with the embodiment of the previous Figure
  • Figure 11 shows a sectional view along line XI-XI of the previous Figure.
  • the modular positioning device 1 of the invention is adapted to position at least one supporting element 13 for positioning mechanical abutment components on control calipers or on means for statistically detecting control points.
  • the modular positioning device 1 is substantially composed of a fixed support 2 hingedly connected (in 102) to a rotatable joint 4 adapted to assume a plurality of angular positions with respect to the fixed support 2; moreover, the rotatable joint 4 is equipped with at least one articulated arm 3 on which the supporting elements 13 are fastened, and the articulated arm 3 is adapted to rotate around its own axis in any angular position related to the rotatable joint 4.
  • such fixed support 2 is a prismatic riser comprising a face 21 crossed by fastening holes 22 and a face 23.
  • the face 23 is crossed by a cylindrical hole 24 and by a radial slit 25 adapted to guarantee a certain structural elasticity to the side wall of such cylindrical hole 24.
  • the articulated arm 3 is composed of a series of prismatic rods 7, 8, preferably shaped as an elongated parallelepiped, adapted to perform the function of positioning elongation, and, as such, shown in Figure 2 in a series of variations, both as regards their length, and as regards their type, and namely a series of rods 7 equipped with terminals to fasten therein the supporting elements 13, and a series of rods 8 adapted to be worked.
  • Each of the rods 7 is composed of a cylinder
  • 71 and comprises a face 72.
  • face 72 is crossed by a cylindrical hole 73 and by a radial slit 74 adapted to guarantee a certain structural elasticity to the side wall of the cylindrical hole 73.
  • Each of the prismatic rods 8 is composed of a cylinder 81, equal to the cylinder 71 of the prismatic rod 7.
  • the cylindrical hole 73 of a first prismatic rod 7 can be coupled with the cylinder 71, 81, of a second prismatic rod 7, 8, through a screw-type tightening adapted to create a terminal-type engagement.
  • the second prismatic rod 7, 8 can therefore assume any angular position related to the first prismatic rod 7, by means of a relative rotation of the cylinder 71 with respect to the cylindrical hole 73.
  • the articulated arm 3 can therefore be arranged according to any shape and size of a spatial broken line.
  • the rotatable joint 4 is composed of a flanged pin 9 and of a small block 10.
  • the flanged pin 9 comprises a cylinder 91 surmounted by a flange 92 comprising a face 93 crossed by a threaded hole 94, and a face 95 crossed by a cylindrical hole 96.
  • This flanged pin 9 is then adapted to rotate around its own axis, taking the whole device 1 to rotate, which can thereby assume in the space all possible operating positions through:
  • the device 1 of the invention is fastened, in a known way, blocking the three possible movement above, in order to be able to bear the supporting element 13 in its desired operating orientation.
  • the small block 10 is composed of a prismatic projection 101 supporting a cylindrical pin 102.
  • Such small block 10 comprises a face 103 crossed by a cylindrical through-hole 105 and by a threaded hole 106, and a face 104 crossed by a cylindrical hole 107 and by a radial slit 108 adapted to guarantee a certain structural elasticity to the side wall of the cylindrical hole 107.
  • a pin with threaded seat 11 is screwed into the threaded hole 106.
  • a knob with threaded stem 12 is inserted into the cylindrical through-hole 105.
  • the cylindrical pin 102 is forcedly keyed-in into the cylindrical hole 96 through bushes (not shown) keyed-in onto the wall of the hole 96 in order to remove any type of inaccuracy of mechanical workings and of dimensional tolerances.
  • locking of the rotatable joint 4 occurs through the pin with threaded seat 11 adapted to be an abutment with respect to the face 93 and through the knob with threaded stem 12 screwed into the threaded hole 94.
  • the fixed support 2 is connected to the rotatable joint 4 by means of a coupling between cylinder 91 and cylindrical hole 24 through a screw-type tightening adapted to create a terminal-type engagement.
  • the articulated arm 3 is connected to the rotatable joint 4 by means of a coupling between cylinder 71, 81, and cylindrical hole 107 through screw-type tightening adapted to create a terminal-type engagement.
  • the articulated arm 3 can assume any angular position related to the rotatable joint 4, by means of a relative rotation of the cylinder 71, 81 with respect to the cylindrical hole 107.
  • the modular positioning device 1 is capable of being spatially repositioned, assuming an active configuration adapted to perform every type of dimensional measure and check.
  • the supporting element 13 is preferably a prismatic rod 13 adapted to support measuring instruments and metric laboratory tools, such as a digital comparator, a lens, a camera, etc. (not shown); such rod 13 is equipped with a cylinder 131 and comprises a face 132 crossed by a threaded cylindrical hole 133.
  • Such prismatic rod 13 comprises a threaded adjustment bush 14 for a digital comparator inserted into the cylindrical threaded hole 133 and blocked with a threaded ring nut 134.
  • the threaded adjustment bush 14 allows recovering possible geometric errors due to workings .
  • the cylinder 131 is coupled through a threaded ring nut 135 to the cylindrical hole 73 or to the cylindrical hole 107.
  • the components of the modular positioning device 1 of the invention are preferably obtained from aluminium drawn material.
  • the modular positioning device 1 is capable of repetitively and accurately operate, allowing to create configurations with ample movements of the articulated arm 3.
  • the modular positioning device 1 is capable of modifying its own configuration, allowing the overturning of the articulated arm 3 with respect to the fixed support 2 in an accurate and repetitive way, by means of the overturning joint

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

A modular positioning device (1) is described, adapted to position at least one supporting element (13) for mechanical abutment components on control calipers or on means for statistically detecting control points, composed of a fixed support (2) hingedly connected (in 102) to a rotatable joint (4) adapted to assume a plurality of angular positions with respect to said fixed support (2), wherein the rotatable joint (4) is equipped with at least one articulated arm (3) on which the supporting elements (13) are fastened, said articulated arm (3) being adapted to rotate around its own axis in any angular position related to the rotatable joint (4).

Description

MODULAR POSITIONING DEVICE
The present invention refers to a modular positioning device.
In particular the present invention refers to an overturning and positioning device for positioning mechanical abutment components, which can be, for example:
1) guiding bushes for digital comparators
2) plates with mechanical components suitable for referring or checking
3) small blocks whose volume, milled at numeric control, is suitable for ckecing by interposing pads made with use tolerances
4) blades which show sections of the element to check, performed with probe values which allow checking with pads.
This in order to compare measures on control calipers, through digital comparators, or on means for statistically detecting control points.
A modular positioning device is composed of a set of arms comprising different dedicated accessories arranged along an axis orthogonal to a surface, next to such calipers or control points.
The prior art is represented by US8174684, dealing with a modular system comprising a measuring head and composed of a central module equipped with interface elements connected to a recess obtained inside such central module and adapted to support a lighting module, a lens module, a mirror module, a camera module. Such central module further comprises a mechanical assembling device adapted to support such measuring head.
Such modular system however does not allow any rotation of such measuring head, rotation instead necessary to be able to reach a desired space configuration and does not allow an accurate repositioning of such measuring head, instead necessary to be able to pass from a standby configuration to a measuring configuration.
The prior art is also represented by
International Patent Application WO2013190031 dealing with a modular articulated arm CMM (Coordinate-Measuring Machine) composed of an articulated arm configured for supporting a tool and comprising at least two section mutually connected by articulated joints equipped with integrated angular encoders and connected to electronic cards configured for transmitting signals, from each encoder, towards a circuit adapted to obtain a relative position between the sections of such arm.
Also such articulated arm however does not allow an accurate re-positioning since such articulated joints depend on construction tolerances of such angular encoders.
Therefore, object of the present invention is solving the above prior art problems, by providing a modular positioning device capable of operating in a repetitive and accurate way, allowing to form configurations with wide movement of the arms.
A further object is providing a modular positioning device capable of being spatially repositioned, assuming different configurations and quickly passing from a passive to an active configuration and vice versa.
The above and other objects ad advantages of the invention, as will appear from the following description, are obtained with a modular positioning device as claimed in Claim 1. Preferred embodiments and non trivial variations of the present invention are the subject matter of the dependent claims.
It is intended that all enclosed claims are an integral part of the present description.
It will be immediately obvious that numerous variations and modifications (for example related to shape, sizes, arrangements and parts with equivalent functionality) can be made to what is described, without departing from the scope of the invention, as appears from the enclosed claims.
The present invention will be better described by some preferred embodiments thereof, provided as a non-limiting example, with reference to the enclosed drawings, in which:
Figure 1 shows an axonometric view of a measuring bench dealing with an example of use and an embodiment of the modular positioning device according to the present invention;
Figure 2 shows an exploded axonometric view dealing with an embodiment of the modular positioning device according to the present invention;
Figure 3 shows an axonometric view of a fixed support dealing with the embodiment of Figure 2;
Figure 4 shows an axonometric view of a prismatic holed rod of a articulated arm dealing with the embodiment of Figure 2;
Figure 5 shows an axonometric view of a non- holed prismatic rod dealing with the embodiment of Figure 2;
Figure 6 shows an axonometric view of a rotatable joint dealing with the embodiment of Figure 2;
Figure 7 shows a plan view of the rotatable joint dealing with the embodiment of the previous Figure ;
Figure 8 shows a sectional view along line VIII-VIII of the previous Figure;
Figure 9 shows an axonometric view of a supporting element dealing with the embodiment of Figure 2;
Figure 10 shows a plan view of the supporting element dealing with the embodiment of the previous Figure;
Figure 11 shows a sectional view along line XI-XI of the previous Figure.
With reference to Figures 1 and 2, the modular positioning device 1 of the invention is adapted to position at least one supporting element 13 for positioning mechanical abutment components on control calipers or on means for statistically detecting control points.
The modular positioning device 1 is substantially composed of a fixed support 2 hingedly connected (in 102) to a rotatable joint 4 adapted to assume a plurality of angular positions with respect to the fixed support 2; moreover, the rotatable joint 4 is equipped with at least one articulated arm 3 on which the supporting elements 13 are fastened, and the articulated arm 3 is adapted to rotate around its own axis in any angular position related to the rotatable joint 4.
With reference to Figure 3, such fixed support 2 is a prismatic riser comprising a face 21 crossed by fastening holes 22 and a face 23. The face 23 is crossed by a cylindrical hole 24 and by a radial slit 25 adapted to guarantee a certain structural elasticity to the side wall of such cylindrical hole 24.
With reference to Figures 4, 5, the articulated arm 3 is composed of a series of prismatic rods 7, 8, preferably shaped as an elongated parallelepiped, adapted to perform the function of positioning elongation, and, as such, shown in Figure 2 in a series of variations, both as regards their length, and as regards their type, and namely a series of rods 7 equipped with terminals to fasten therein the supporting elements 13, and a series of rods 8 adapted to be worked.
Each of the rods 7 is composed of a cylinder
71 and comprises a face 72. Such face 72 is crossed by a cylindrical hole 73 and by a radial slit 74 adapted to guarantee a certain structural elasticity to the side wall of the cylindrical hole 73.
Each of the prismatic rods 8 is composed of a cylinder 81, equal to the cylinder 71 of the prismatic rod 7.
The major peculiarity of the present invention is that such cylinders 71, 81 allow their respective prismatic rods 7, 8 to rotate around their own axis, and therefore to rotate with respect to the rotatable joint 4 to which they are connected, thereby assuming a further series of support positions of the supporting element 13 in space .
With reference to Figure 2, in order to provide a further degree of freedom to the device 1 of the invention, in order to possibly mutually connect several prismatic rods 7, 8, the cylindrical hole 73 of a first prismatic rod 7 can be coupled with the cylinder 71, 81, of a second prismatic rod 7, 8, through a screw-type tightening adapted to create a terminal-type engagement.
The second prismatic rod 7, 8 can therefore assume any angular position related to the first prismatic rod 7, by means of a relative rotation of the cylinder 71 with respect to the cylindrical hole 73.
The articulated arm 3 can therefore be arranged according to any shape and size of a spatial broken line.
With reference to Figures 6, 7, 8, the rotatable joint 4 is composed of a flanged pin 9 and of a small block 10.
The flanged pin 9 comprises a cylinder 91 surmounted by a flange 92 comprising a face 93 crossed by a threaded hole 94, and a face 95 crossed by a cylindrical hole 96.
This flanged pin 9 is then adapted to rotate around its own axis, taking the whole device 1 to rotate, which can thereby assume in the space all possible operating positions through:
1) rotation around the axis of the flanged pin 2) angular overturning around the pin 102; and
3) rotation around the axis of the prismatic rods 7, 8.
Therefore, after having performed any one or all above mentioned movements, and after having established the desired operating position, the device 1 of the invention is fastened, in a known way, blocking the three possible movement above, in order to be able to bear the supporting element 13 in its desired operating orientation.
In the practical and non limiting solution as shown, moreover, the small block 10 is composed of a prismatic projection 101 supporting a cylindrical pin 102.
Such small block 10 comprises a face 103 crossed by a cylindrical through-hole 105 and by a threaded hole 106, and a face 104 crossed by a cylindrical hole 107 and by a radial slit 108 adapted to guarantee a certain structural elasticity to the side wall of the cylindrical hole 107.
A pin with threaded seat 11 is screwed into the threaded hole 106.
A knob with threaded stem 12 is inserted into the cylindrical through-hole 105. The cylindrical pin 102 is forcedly keyed-in into the cylindrical hole 96 through bushes (not shown) keyed-in onto the wall of the hole 96 in order to remove any type of inaccuracy of mechanical workings and of dimensional tolerances.
Due to such coupling, any rotation of such small block 10 with respect to the flanged pin 9 is accurately performed.
In particular, locking of the rotatable joint 4 occurs through the pin with threaded seat 11 adapted to be an abutment with respect to the face 93 and through the knob with threaded stem 12 screwed into the threaded hole 94.
With reference to Figure 2, the fixed support 2 is connected to the rotatable joint 4 by means of a coupling between cylinder 91 and cylindrical hole 24 through a screw-type tightening adapted to create a terminal-type engagement.
Moreover, as already stated, the articulated arm 3 is connected to the rotatable joint 4 by means of a coupling between cylinder 71, 81, and cylindrical hole 107 through screw-type tightening adapted to create a terminal-type engagement.
The articulated arm 3 can assume any angular position related to the rotatable joint 4, by means of a relative rotation of the cylinder 71, 81 with respect to the cylindrical hole 107.
With the locking of the rotatable joint 4, the modular positioning device 1 is capable of being spatially repositioned, assuming an active configuration adapted to perform every type of dimensional measure and check.
With reference to Figures 9, 10, 11, the supporting element 13 is preferably a prismatic rod 13 adapted to support measuring instruments and metric laboratory tools, such as a digital comparator, a lens, a camera, etc. (not shown); such rod 13 is equipped with a cylinder 131 and comprises a face 132 crossed by a threaded cylindrical hole 133.
Such prismatic rod 13 comprises a threaded adjustment bush 14 for a digital comparator inserted into the cylindrical threaded hole 133 and blocked with a threaded ring nut 134. The threaded adjustment bush 14 allows recovering possible geometric errors due to workings .
With reference to Figure 2, to be able to connect the supporting element 13 to the prismatic rod 7 or directly to the overturning joint 4, the cylinder 131 is coupled through a threaded ring nut 135 to the cylindrical hole 73 or to the cylindrical hole 107.
The components of the modular positioning device 1 of the invention are preferably obtained from aluminium drawn material.
The modular positioning device 1 is capable of repetitively and accurately operate, allowing to create configurations with ample movements of the articulated arm 3.
The modular positioning device 1 is capable of modifying its own configuration, allowing the overturning of the articulated arm 3 with respect to the fixed support 2 in an accurate and repetitive way, by means of the overturning joint

Claims

Modular positioning device (1), adapted to position at least one supporting element (13) for mechanical abutment components on control calipers or on means for statistically detecting control points, composed of a fixed support (2) hingedly connected (in 102) to a rotatable joint (4) adapted to assume a plurality of angular positions with respect to said fixed support (2), characterized in that said rotatable joint (4) is equipped with at least one articulated arm (3) on which said supporting elements (13) are fastened, said articulated arm (3) being adapted to rotate around its own axis in any angular position related to said rotatable joint (4) .
Modular positioning device (1) according to claim 1, characterized in that said articulated arm (3) is composed of at least one prismatic rod (7, 8), preferably shaped as an elongated parallelepiped, equipped at an end with a cylinder (71, 81) adapted to be coupled with a cylindrical hole (107) of which said rotatable joint (4) is equipped, and equipped at the opposite end with a cylindrical hole (73, 83) adapted to be operatively coupled with a respective cylinder (131) of which said supporting element (13) is equipped.
Modular positioning device (1) according to claim 1 or 2, characterized in that said rotatable joint (4) is composed of a flanged pin
(9) and of a small block (10) hinged (in 102) onto said flanged pin (9), said flanged pin (9) being adapted to rotate around its own axis and to thereby rotate the whole positioning device (1) .
Modular positioning device (1) according to claim 2, characterized in that said flanged pin
(9) comprises a cylinder (91) surmounted by a flange (92) comprising a face (93) crossed by a threaded hole (94), and a face (95) crossed by a cylindrical hole (96) inside which a cylindrical pin (102) is connected, said small block (10) being composed of a prismatic projection (101) supporting said cylindrical pin (102) forcedly keyed-in into said cylindrical hole (96) .
Modular positioning device (1) according to any one of the previous claims, characterized in that said supporting element (13) comprises at least one threaded adjustment bush (14) with digital comparator and said cylinder (131) further adapted to be inserted into said hole (107) of said rotatable joint (4).
6. Modular positioning device (1) according to any one of the previous claims, characterized in that it is made of aluminium drawn material.
PCT/IT2014/000051 2014-02-24 2014-02-24 Modular positioning device WO2015125165A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2014/000051 WO2015125165A1 (en) 2014-02-24 2014-02-24 Modular positioning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2014/000051 WO2015125165A1 (en) 2014-02-24 2014-02-24 Modular positioning device

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107388921A (en) * 2017-07-31 2017-11-24 安徽江淮汽车集团股份有限公司 A kind of turnover detection pin bearing
IT202100015401A1 (en) * 2021-06-11 2022-12-11 Spagnolo S R L Modular control equipment for metrology room

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251922A (en) * 1979-05-31 1981-02-24 Premier Engineering Co., Inc. Universal preset tooling gage
US5433013A (en) * 1993-09-24 1995-07-18 Micron Custom Manufacturing Services, Inc. Fixture for alignment of vacuum nozzles on semiconductor manufacturing equipment
US20060101660A1 (en) * 2004-11-18 2006-05-18 Tokyo Seimitsu Co., Ltd. Detector supporting mechanism
US20130132026A1 (en) * 2010-03-26 2013-05-23 Leica Geosystems Ag Measurement method for a surface-measuring measuring machine
US20130187022A1 (en) * 2012-01-20 2013-07-25 Hexagon Metrology, Inc. Locking counterbalance for a cmm
WO2013190031A1 (en) * 2012-06-22 2013-12-27 Hexagon Technology Center Gmbh Articulated arm cmm

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251922A (en) * 1979-05-31 1981-02-24 Premier Engineering Co., Inc. Universal preset tooling gage
US5433013A (en) * 1993-09-24 1995-07-18 Micron Custom Manufacturing Services, Inc. Fixture for alignment of vacuum nozzles on semiconductor manufacturing equipment
US20060101660A1 (en) * 2004-11-18 2006-05-18 Tokyo Seimitsu Co., Ltd. Detector supporting mechanism
US20130132026A1 (en) * 2010-03-26 2013-05-23 Leica Geosystems Ag Measurement method for a surface-measuring measuring machine
US20130187022A1 (en) * 2012-01-20 2013-07-25 Hexagon Metrology, Inc. Locking counterbalance for a cmm
WO2013190031A1 (en) * 2012-06-22 2013-12-27 Hexagon Technology Center Gmbh Articulated arm cmm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107388921A (en) * 2017-07-31 2017-11-24 安徽江淮汽车集团股份有限公司 A kind of turnover detection pin bearing
IT202100015401A1 (en) * 2021-06-11 2022-12-11 Spagnolo S R L Modular control equipment for metrology room

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