CN201093976Y - Radial deflection measuring device for assembling closed hollow shaft parts - Google Patents
Radial deflection measuring device for assembling closed hollow shaft parts Download PDFInfo
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- CN201093976Y CN201093976Y CNU2007200817111U CN200720081711U CN201093976Y CN 201093976 Y CN201093976 Y CN 201093976Y CN U2007200817111 U CNU2007200817111 U CN U2007200817111U CN 200720081711 U CN200720081711 U CN 200720081711U CN 201093976 Y CN201093976 Y CN 201093976Y
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- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 238000005259 measurement Methods 0.000 claims abstract description 30
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Abstract
A radial deflection measuring device for assembling closed hollow shaft parts comprises a positioning mechanism and a measuring mechanism. The positioning mechanism comprises an elastic chuck, a pull rod, a fastening screw, a limiting pin, a support plate, a tensioning nut and a pressure plate; the measuring mechanism is an internal dial gauge structure and comprises a contact, a contact sleeve, a mandril sleeve, an adjusting screw, a connecting rod, a supporting rod, a spring, a gauge clamp and a gauge clamp nut. The end surface of the tail part of the contact is an inclined surface, and the included angle between the inclined surface and the axis of the contact is 45 degrees; the end face of one end of the ejector rod is an inclined plane, and the included angle between the inclined plane and the axis of the ejector rod is 45 degrees; the push rod is arranged in the push rod sleeve, the end of the inclined plane of the push rod passes through the guide sleeve on the contact sleeve and is attached to the inclined plane of the tail part of the contact, and the other end of the push rod passes through the first connecting section of the connecting rod and is contacted with the support rod. During measurement, the contact 7 rotates the detected radial deflection value 1: 1 to a measuring instrument outside the device through the ejector rod 4.
Description
Technical field
The utility model belongs to the radial beat measurement mechanism of axial workpiece assembling usefulness, particularly a kind of radial beat measurement mechanism of closed hollow axial workpiece assembling usefulness.
Background technology
In some machine or equipment, usually there is the hollow axial workpiece more than two or two to need coaxial cable to install, and wherein one endoporus is sealed by other part, for example, High Pressure Turbine Rotor axle in the aircraft engine and Low Pressure Turbine Rotor axle, need control radial beat when this type of part is installed, therefore, need to use the radial beat measurement mechanism.
About the radial beat measurement mechanism of hollow axial workpiece assembling usefulness, disclosed data seldom.It is reported, when detecting aircraft engine High Pressure Turbine Rotor axle internal diameter to the radial beat of Low Pressure Turbine Rotor rotation, China has enterprise to introduce a kind of radial beat measurement mechanism of lever principle structure from Russia, this device employing tapering and steel ball centering, collet auxiliary positioning realize measuring with the overlength lever of nearly 620mm.Because the lever construction motion is movement in a curve, therefore be difficult in the deep hole of sealing, finding the measuring position accurately, be difficult to satisfy Testing requirement.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and the radial beat measurement mechanism of a kind of closed hollow axial workpiece assembling usefulness is provided, and this kind installs that not only positioning stablity is reliable, is quick on the draw measuring accuracy height, and convenient reading.
The radial beat measurement mechanism of closed hollow axial workpiece assembling usefulness described in the utility model comprises detent mechanism and measuring mechanism.Detent mechanism comprises collet, pull bar, trip bolt, spacer pin, support plate, tightening nut and pressing plate; One end of pull bar is the circular cone stage body, the other end is processed with external thread, its endoporus is a mounting hole, offers stopper slot and two mounting holes that center line is parallel on its shaft, and the distance between the centre distance a of described waist shape endoporus and residing working position of contact head and the off-position is complementary; The assembling mode of each member of detent mechanism: pull bar is installed in the endoporus of collet, and its circular cone stage body end is positioned at the folder head sections of collet, its thread end elasticity of extension chuck afterbody; Support plate is sleeved on the collet afterbody and is connected with the collet afterbody; Tightening nut is installed in the threaded portion section of pull bar; The mounting hole that trip bolt passes on collet and the pull bar shaft inserts the pull bar endoporus, with the locking measuring mechanism; Spacer pin is installed in the stopper slot on the pull bar shaft, with prevent that pull bar from skidding off from collet and in the tension process pull rod screw surpass support plate and cause the tension effect to be lost efficacy; The inner chamber of pressing plate is formed by counter sink, the pilot hole that communicates with counter sink, and the end face of counter sink portion section pastes mutually with the end face of support plate.Measuring mechanism is the inside dial indicator structure, comprises contact, contact cover, push rod, top stem casing, dog screw, extension bar, pole, spring, table folder and table folder nut; The tail end face of contact is the inclined-plane, and the angle of itself and contact axis is 45 degree; Push rod one end end face is the inclined-plane, and the angle of described inclined-plane and push rod axis is 45 degree; Extension bar is a pipe fitting, and two sections connecting portion sections are arranged; Top stem casing is installed in the endoporus of pull bar, the circular cone stage body end that the one end passes pull bar connects with the orienting sleeve that contact cover sidewall passes through mutually, the thread end that its other end passes pull bar is connected with the first connecting portion section of extension bar, and top stem casing can slide in the waist shape endoporus of pull bar; The afterbody of contact is installed in the contact cover and with contact and overlaps endoporus for movingly, and the head of contact is positioned at outside the contact cover, and contact can overlap axis along contact and slide; The second connecting portion section of extension bar is positioned at the pilot hole of pressing plate and is connected with pressing plate; Pole be installed in the second connecting portion section endoporus of extension bar and with the second connecting portion section endoporus for movingly; Spring is installed in the extension bar hole, and touch with pole and table clamping connection respectively at two ends, is used for guaranteeing that in measuring process contact contacts with tested surface is fine; Push rod is installed in the top stem casing, its beveled end is passed the orienting sleeve that contact puts and is pasted mutually with the inclined-plane of contact tail, the first connecting portion section that its other end passes extension bar contacts with pole, the first connecting portion section endoporus of orienting sleeve endoporus that push rod and contact put and extension bar can endwisely slip along it for movingly; Adjust screw and be installed in the position of subsides mutually that contact put and be positioned at contact tail and push rod, keep certain distance with the position of subsides mutually of contact tail and push rod during installation, to adjust the activity of contact; Table folder and table folder nut are installed in the extension bar afterbody.
Radial beat measurement mechanism described in the utility model has following beneficial effect;
1, detent mechanism has centering and spacing function, has guaranteed that tested hollow axial workpiece location centering is reliable and stable.
2, measuring mechanism is found the measuring position accurately and is easier in the space of sealing, and has successfully realized moving of longer distance in less space.
3, measuring mechanism adopts the inside dial indicator structure, helps improving measuring accuracy, and test shows that repeatable accuracy is not more than 0.005.
4, the faying face of contact and push rod is 45 degree inclined-planes in the measuring mechanism, the forwarding to outside the device of the radial beat value that detected 1: 1 can be made convenient reading.
5, High Pressure Turbine Rotor axle and the radial beat between the Low Pressure Turbine Rotor axle that is specially adapted in the aircraft engine measured.
Description of drawings
Fig. 1 is a kind of structural drawing of the radial beat measurement mechanism of hollow axial workpiece assembling usefulness described in the utility model, and the radial beat measurement mechanism among this figure is in off working state;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is the in running order synoptic diagram of radial beat measurement mechanism among Fig. 1;
Fig. 4 is the structural drawing of pull bar;
Fig. 5 is the B-B cut-open view of Fig. 4;
Fig. 6 is the structural drawing of pressing plate;
Fig. 7 is the C-C cut-open view of Fig. 6.
Among the figure, 1-collet, 2-pull bar, 3-top stem casing, 4-push rod, 5-contact cover, 6-adjust screw, 7-contact, 8-trip bolt, 9-spacer pin, 10-support plate, 11-tightening nut, 12-pressing plate, 13-extension bar, 14-pole, 15-table folder, 16-spring, 17-table folder nut, 18-Low Pressure Turbine Rotor axle, 19-High Pressure Turbine Rotor axle, 20-circular cone stage body, 21-stopper slot, 22-mounting hole, 23-external thread, 24-pull bar endoporus, 25-counter sink, 26-pilot hole.
Embodiment
Measure below in conjunction with the High Pressure Turbine Rotor axle in the aircraft engine and the radial beat between the Low Pressure Turbine Rotor axle, the structure and the using method of radial beat measurement mechanism described in the utility model is described further.
In the present embodiment, the structure of radial beat measurement mechanism such as Fig. 1, Fig. 2, shown in Figure 3 are made up of detent mechanism and measuring mechanism.
Detent mechanism comprises collet 1, pull bar 2, trip bolt 8, spacer pin 9, support plate 10, tightening nut 11 and pressing plate 12.The structure of pull bar 2 and shape such as Fig. 4, shown in Figure 5, the circular cone stage body 20 that the one end is and collet 1 mates, the other end is processed with external thread 23, and its endoporus 24 is a mounting hole, its shaft is cylindrical, offers stopper slot 21 and two mounting holes 22 that center line is parallel on the shaft; Distance between the centre distance a of the waist shape endoporus 24 of pull bar and residing working position of contact head in the measuring mechanism and the off-position is complementary.During assembling, pull bar 2 is installed in the endoporus of collet 1, and its circular cone stage body end is positioned at the folder head sections of collet 1, its thread end elasticity of extension chuck 1 afterbody, and the endoporus of its shaft and collet 1 is for movingly; Support plate 10 is sleeved on collet 1 afterbody, is connected by stationary fit realization and collet afterbody; Tightening nut 11 is installed in the threaded portion section of pull bar 2, rotates tightening nut, then can make the axis move left and right of pull bar 2 along collet 1, thereby adjusts the opening width of the folder head sections of collet 1 by the circular cone stage body 20 of pull bar; Trip bolt 8 is four, and each inserts two in two mounting holes 22 on the pull bar shaft; Spacer pin 9 is installed in the stopper slot 21 on the pull bar shaft, to prevent that pull bar from skidding off and surpass support plate in tension process pull rod screw from collet the effect of tightening nut is lost efficacy; The inner chamber of pressing plate 12 is formed by counter sink 25, the pilot hole 26 that communicates with counter sink, and the end face of its counter sink portion section pastes mutually with the end face of support plate 10.
Measuring mechanism comprises contact 7, contact cover 5, push rod 4, top stem casing 3, adjusts screw 6, extension bar 13, pole 14, spring 16, table folder 15 and shows folder nut 17.The profile of top stem casing 3 is cylindrical, and waist shape endoporus 24 apertures of its external diameter and pull bar 2 are complementary, and can slide in the waist shape endoporus of pull bar; The external diameter of push rod 4 is less than the internal orifice dimension of top stem casing, and one end-face is the inclined-plane, and the angle of described inclined-plane and push rod axis is 45 degree; The tail end face of contact 7 is the inclined-plane, and the angle of itself and contact axis is 45 degree; Extension bar 13 is circular pipe fitting, and two sections connecting portion sections are arranged.Top stem casing 3 is installed in the endoporus 24 of pull bar, the circular cone stage body end that the one end passes pull bar and contact overlap the orienting sleeve that 5 sidewalls pass through mutually to be realized being connected by stationary fit, and the thread end that its other end passes pull bar is connected by the stationary fit realization with the first connecting portion section of extension bar 13; The second connecting portion section of extension bar 13 is positioned at the pilot hole of pressing plate 12, is connected by stationary fit realization and pressing plate; Pole 14 be installed in the second connecting portion section endoporus of extension bar 13 and with the second connecting portion section endoporus for movingly; Spring 16 is installed in extension bar 13 holes, and two ends contact with table folder 15 with pole 14 respectively; The afterbody of contact is installed in the contact cover 5 and with contact and overlaps endoporus for movingly, and the head of contact is positioned at outside the contact cover; Push rod 4 is installed in the top stem casing 3, the beveled end of push rod 4 is passed the orienting sleeve that contact puts and is pasted mutually with the inclined-plane of contact tail, the first connecting portion section that its other end passes extension bar 13 contacts with pole 14, and orienting sleeve endoporus that push rod 4 and contact put and the first connecting portion section endoporus of extension bar 13 are for movingly; Adjust the position of subsides mutually that screw 6 is installed on the contact cover 5 and is positioned at contact tail and push rod, keep certain distance with the position of subsides mutually of contact tail and push rod during installation; Table folder 15 and table folder nut are installed in extension bar 13 afterbodys, are used for fixing measurement instrument.
During measurement, the mounting means of High Pressure Turbine Rotor axle, Low Pressure Turbine Rotor axle and radial beat measurement mechanism such as Fig. 1, Fig. 2, shown in Figure 3, as can be seen from the figure, High Pressure Turbine Rotor axle 19 and Low Pressure Turbine Rotor axle 18 suits, the endoporus of High Pressure Turbine Rotor axle 19 is by other sealing that replaces the spare parts mutually, having only has one group of aperture to communicate with the endoporus of High Pressure Turbine Rotor axle 19 on Low Pressure Turbine Rotor axle 18 inner hole walls, the aperture on Low Pressure Turbine Rotor axle 18 inner hole walls is apart from more than 600 millimeter of the positioning end of Low Pressure Turbine Rotor axle 18.The folder head sections of the collet 1 in the radial beat measurement mechanism inserts the endoporus of Low Pressure Turbine Rotor axle 18 and makes the end face of Low Pressure Turbine Rotor axle 18 be close to the locating surface of collet 1, and the opening width of adjusting chucks by rotation tightening nut 11 is realized tensioner centering then.When the radial beat measurement mechanism was in off working state, top stem casing 3 fastened screws 8 were fixed on waist shape endoporus 24 belows of pull bar 2, and under this kind state, the head of contact 7 is arranged in Low Pressure Turbine Rotor axle 18 endoporus, as shown in Figure 1 and Figure 2; When the radial beat measurement mechanism is in running order, top stem casing 3 fastened screws 8 are fixed on waist shape endoporus 24 tops of pull bar 2, under this kind state, the head of contact 7 passes aperture on Low Pressure Turbine Rotor axle 18 walls and enters High Pressure Turbine Rotor axle 19 endoporus and contact with the hole wall of High Pressure Turbine Rotor axle 19, as shown in Figure 3.
During measurement, the radial beat measurement mechanism is adjusted to duty, Low Pressure Turbine Rotor axle 18 drives the rotation of radial beat measurement mechanisms, and the moving radially of contact 7 drives push rod 4 and move axially, the radial beat value that contact 7 is detected by push rod 41: 1 forward measurement instrument outside the device to.
Claims (5)
1. the radial beat measurement mechanism of a closed hollow axial workpiece assembling usefulness comprises detent mechanism and measuring mechanism, it is characterized in that:
Detent mechanism comprises trip bolt (8), spacer pin (9), support plate (10), tightening nut (11) and the pressing plate (12) of collet (1), pull bar (2), locking measuring mechanism; One end of pull bar (2) is circular cone stage body (20), and the other end is processed with external thread (23), and its endoporus (24) is a mounting hole, offers stopper slot (21) and two mounting holes (22) that center line is parallel on its shaft; Pull bar (2) is installed in the endoporus of collet (1), and its circular cone stage body end is positioned at the folder head sections of collet (1), its thread end elasticity of extension chuck (1) afterbody; Support plate (10) is sleeved on collet (1) afterbody and is connected with the collet afterbody; Tightening nut (11) is installed in the threaded portion section of pull bar (2), and the mounting hole (22) that trip bolt (8) passes on collet and the pull bar shaft inserts pull bar endoporus (24), and spacer pin (9) is installed in the stopper slot (21) on the pull bar shaft; The inner chamber of pressing plate (12) is formed by counter sink (25), the pilot hole (26) that communicates with counter sink, and the end face of counter sink portion section pastes mutually with the end face of support plate (10);
Measuring mechanism comprises contact (7), contact cover (5), push rod (4), top stem casing (3), adjusts screw (6), extension bar (13), pole (14), spring (16), table folder (15) and shows folder nut (17); The tail end face of contact (7) is the inclined-plane, and the angle of itself and contact axis is 45 degree; Push rod (4) one end end faces are the inclined-plane, and the angle of described inclined-plane and push rod axis is 45 degree; Extension bar 13 is a pipe fitting, and two sections connecting portion sections are arranged; Top stem casing (3) is installed in the endoporus (24) of pull bar, and the circular cone stage body end that the one end passes pull bar connects with the orienting sleeve that contact cover (5) sidewall passes through mutually, and the thread end that its other end passes pull bar is connected with the first connecting portion section of extension bar (13); The afterbody of contact (7) is installed in the contact cover (5) and with contact and overlaps endoporus for movingly, and the head of contact is positioned at outside the contact cover; The second connecting portion section of extension bar (13) is positioned at the pilot hole of pressing plate (12) and is connected with pressing plate; Pole (14) be installed in the second connecting portion section endoporus of extension bar (13) and with the second connecting portion section endoporus for movingly; Spring (16) is installed in extension bar (13) hole, and two ends contact with table folder (15) with pole (14) respectively; Push rod (4) is installed in the top stem casing (3), its beveled end is passed the orienting sleeve that contact puts and is pasted mutually with the inclined-plane of contact tail, the first connecting portion section that its other end passes extension bar (13) contacts with pole (14), and orienting sleeve endoporus that push rod (4) and contact put and the first connecting portion section endoporus of extension bar (13) are for movingly; Adjust screw (6) and be installed in the position of subsides mutually that contact (7) afterbody and push rod (4) were gone up and be positioned to contact cover (5); Table folder (15) and table folder nut are installed in extension bar (13) afterbody.
2. the radial beat measurement mechanism of closed hollow axial workpiece according to claim 1 assembling usefulness is characterized in that the centre distance a of waist shape endoporus (24) of pull bar (2) and the distance between residing working position of contact (7) head and the off-position are complementary.
3. the radial beat measurement mechanism of closed hollow axial workpiece assembling usefulness according to claim 1 and 2, the profile that it is characterized in that top stem casing (3) is cylindrical, endoporus (24) aperture of its external diameter and pull bar (2) is complementary.
4. the radial beat measurement mechanism of hollow axial workpiece assembling usefulness according to claim 1 and 2 is characterized in that the connected mode of the first connecting portion section of orienting sleeve that top stem casing (3) two ends and contact cover (5) sidewall pass through mutually and extension bar (13) is that stationary fit is connected.
5. the radial beat measurement mechanism of hollow axial workpiece assembling usefulness according to claim 3 is characterized in that the connected mode of the first connecting portion section of orienting sleeve that top stem casing (3) and contact cover (5) sidewall pass through mutually and extension bar (13) is that stationary fit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200817111U CN201093976Y (en) | 2007-11-01 | 2007-11-01 | Radial deflection measuring device for assembling closed hollow shaft parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200817111U CN201093976Y (en) | 2007-11-01 | 2007-11-01 | Radial deflection measuring device for assembling closed hollow shaft parts |
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|---|---|
| CN201093976Y true CN201093976Y (en) | 2008-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200817111U Expired - Lifetime CN201093976Y (en) | 2007-11-01 | 2007-11-01 | Radial deflection measuring device for assembling closed hollow shaft parts |
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| CN (1) | CN201093976Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804600A (en) * | 2010-04-09 | 2010-08-18 | 苏秀章 | Measuring device during machining of cylindrical grinder |
| CN102519414A (en) * | 2011-12-30 | 2012-06-27 | 成都发动机（集团）有限公司 | Inner diameter measurement device for commutator of high-pressure compressor |
| CN102980486A (en) * | 2012-12-11 | 2013-03-20 | 成都发动机（集团）有限公司 | Meshing clearance measuring device for bevel gear pair of central transmission casing of plane under loading |
| CN105277100A (en) * | 2015-11-11 | 2016-01-27 | 成都发动机（集团）有限公司 | Bounce measurement tool of inner hole and external diameter of deep-hole part |
| CN105333845A (en) * | 2015-11-13 | 2016-02-17 | 成都发动机（集团）有限公司 | Deflection measuring clamp for rotor component of high pressure turbine disc of engine |
| CN107263042A (en) * | 2016-04-08 | 2017-10-20 | 贵州黎阳航空动力有限公司 | Aero-engine high-pressure compressor assembles centering and rotating device |
| CN109269455A (en) * | 2018-09-19 | 2019-01-25 | 大连理工大学 | A kind of self-centering in-pipe robot of deep hole |
| CN112705939A (en) * | 2019-10-25 | 2021-04-27 | 中国航发商用航空发动机有限责任公司 | Mounting and dismounting tool and method for assembling aircraft engine assembly |
| CN114877952A (en) * | 2022-07-11 | 2022-08-09 | 山东华颂北理智能科技有限公司 | Main shaft assembly detection device based on numerical control machine tool |
-
2007
- 2007-11-01 CN CNU2007200817111U patent/CN201093976Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804600A (en) * | 2010-04-09 | 2010-08-18 | 苏秀章 | Measuring device during machining of cylindrical grinder |
| CN102519414A (en) * | 2011-12-30 | 2012-06-27 | 成都发动机（集团）有限公司 | Inner diameter measurement device for commutator of high-pressure compressor |
| CN102519414B (en) * | 2011-12-30 | 2014-02-12 | 成都发动机（集团）有限公司 | Inner diameter measurement device for commutator of high-pressure compressor |
| CN102980486A (en) * | 2012-12-11 | 2013-03-20 | 成都发动机（集团）有限公司 | Meshing clearance measuring device for bevel gear pair of central transmission casing of plane under loading |
| CN102980486B (en) * | 2012-12-11 | 2015-03-25 | 成都发动机（集团）有限公司 | Meshing clearance measuring device for bevel gear pair of central transmission casing of plane under loading |
| CN105277100A (en) * | 2015-11-11 | 2016-01-27 | 成都发动机（集团）有限公司 | Bounce measurement tool of inner hole and external diameter of deep-hole part |
| CN105277100B (en) * | 2015-11-11 | 2018-03-02 | 成都发动机（集团）有限公司 | Endoporus and external diameter the bounce measuring tool of deep-hole parts |
| CN105333845B (en) * | 2015-11-13 | 2017-12-12 | 成都发动机（集团）有限公司 | Engine high pressure turbine disk rotor assembly beat measured material |
| CN105333845A (en) * | 2015-11-13 | 2016-02-17 | 成都发动机（集团）有限公司 | Deflection measuring clamp for rotor component of high pressure turbine disc of engine |
| CN107263042A (en) * | 2016-04-08 | 2017-10-20 | 贵州黎阳航空动力有限公司 | Aero-engine high-pressure compressor assembles centering and rotating device |
| CN107263042B (en) * | 2016-04-08 | 2023-11-21 | 中国航发贵州黎阳航空动力有限公司 | Centering rotating device for assembling high-pressure compressor of aero-engine |
| CN109269455A (en) * | 2018-09-19 | 2019-01-25 | 大连理工大学 | A kind of self-centering in-pipe robot of deep hole |
| CN112705939A (en) * | 2019-10-25 | 2021-04-27 | 中国航发商用航空发动机有限责任公司 | Mounting and dismounting tool and method for assembling aircraft engine assembly |
| CN112705939B (en) * | 2019-10-25 | 2022-01-28 | 中国航发商用航空发动机有限责任公司 | Mounting and dismounting tool and method for assembling aircraft engine assembly |
| CN114877952A (en) * | 2022-07-11 | 2022-08-09 | 山东华颂北理智能科技有限公司 | Main shaft assembly detection device based on numerical control machine tool |
| CN114877952B (en) * | 2022-07-11 | 2022-10-04 | 山东华颂北理智能科技有限公司 | Main shaft assembly detection device based on numerical control machine tool |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080730 |