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Adjustable outer cone measuring tool
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Micrometric, Inc. Is located at 1943 Barber Rd in Sarasota and has been in the business of Computer Software Systems Analysis And Design, Custom since 1988.

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  • The current study evaluated prosthetic dental crowns obtained by optical scanning and a computer-aided designing/computer-aided manufacturing system using micro-computed tomography to compare the marginal fit. The virtual models were obtained with four different scanning surfaces: typodont (T), regular impressions (RI), master casts (MC), and powdered master casts (PMC). Five virtual models.
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Publication number
CN201193943Y
CN201193943YCNU2008200209286UCN200820020928UCN201193943YCN 201193943 YCN201193943 YCN 201193943YCN U2008200209286 UCNU2008200209286 UCN U2008200209286UCN 200820020928 UCN200820020928 UCN 200820020928UCN 201193943 YCN201193943 YCN 201193943Y
Authority
CN
China
Prior art keywords
contact terminals
adjustable
Micrometric Laptops For Sale
程钢
井庆合
Original Assignee
Application filed by 程钢filedPriority to CNU2008200209286UpriorityApplication grantedgrantedPublication of CN201193943Ypublication238000009434installationMethods0.000abstract241000013987ColletesSpecies0.000description7
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  • Abstract

    The utility model discloses an adjustable outer cone measuring tool which comprises a bracket, a frame, bearing contact terminals, elastic collets, clock gauges, guiding contact terminals, a micrometer and an L-shaped armed lever. Two edge-shaped bearing contact terminals and two guiding contact terminals with the same structures as the bearing contact terminals are arranged on the frame in the bracket, the guiding contact terminals are installed on the side surface which forms an angle of 90 degrees with the bearing contact terminals, and the installation distance and the height difference ratio of the guiding contact terminals are equal to that of the bearing contact terminals. The clock gauges are fixed on the frame through the elastic collets. In measurement, three clock gauges are all set to the zero positions according to a standard cone sample, and the reading of the micrometer is taken as a fiducial reading. Next, a micrometric screw is loosed downwards, the cone sample is taken out, and a cone workpiece to be measured is put into the tool. The ellipticity of the cone workpiece, the saddle shaped curvature and the drum shaped curvature in the longitudinal section and the flatness error of the generatrix are obtained according to the readings of the three clock gauges. The tool has simple structure, can measure all main parameters of the outer cone surface, and has higher measuring accuracy.

    Description

    A kind of adjustable outer cone survey instrument

    Technical field

    The utility model relates to a kind of survey instrument, specifically a kind of adjustable outer cone survey instrument.

    Background technology

    In machining, often need to measure the intended diameter D of processing parts outer conical surface and the actual error value of d, cone angle and shape of generatrix etc.Want to process qualified circular conical surface, a kind of convenient bevel protractor or gauge of accurately measuring the circular conical surface tapering that can be used at first will be arranged.But, because going up near the structure of circular conical surface, axle limits, existing bevel protractor or Mohs awl gauge are difficult to even can not accurately measure the taper value of circular conical surface on the shaft.General method commonly used is diameter and the length of element of cone or the length of circular cone with milscale or vernier caliper measurement circular conical surface two ends, calculate the tapering of circular conical surface again according to these data, the taper value error of calculating like this is bigger, and reason is end diameter indeterminacy really (because cylindrical is the inclined-plane herein).Because the circular conical surface indeterminacy of grinding is true, so be difficult to guarantee the precision of the processed conical surface.Influence the workpiece processing quality.For this reason, design a kind of specific purpose tool, satisfied the needs that cone shape is measured.

    Micrometric

    The utility model content

    Technical problem to be solved in the utility model provide at the existing in prior technology defective a kind of simple to operate, cost is low is used for the cone shape survey instrument.

    The technical scheme that its technical matters that solves the utility model adopts is: a kind of adjustable outer cone survey instrument, and its structure comprises support, framework, supporting contact, collet, clock gauge, guidance contacts, micrometer, L shaped armed lever; Two knife edge contacts and two guidance contacts with spline structure are arranged on the framework in support, and guidance contacts is installed in and supports contact and become 90 ° side, and the ratio of two guidance contacts mounting distances and difference in height and the installation of supporting contact are consistent; Clock gauge is fixed on the framework by collet.

    Described framework two ends are connected with the micrometric screw parts, and micrometric screw acts on the both ends of the surface of tested circular cone by the spherical contact of its front end, can do axially displaced on guiding device.

    The described whole micrometric screw parts of spline pin and micrometer that comprise are installed on the L shaped armed lever together, and L shaped armed lever is fixed on the framework by means of screw and conical dowel pin.

    A kind of cone shape survey instrument of the present utility model before the measuring workpieces, all is transferred to zero-bit by standard circular cone exemplar with three clock gauges earlier.When in measurement mechanism, laying the circular cone exemplar, must unclamp screw and take out conical dowel pin.Like this, L shaped armed lever just can change 90 ° of pendulum around screw axis, and tested circular cone exemplar is put in the device from right to left gradually, makes the pointer of three clock gauges all be aligned to zero-bit under the situation that turns over a circle.Mobile from left to right then circular cone 0.05~0.10mm, and make it turn back to initial zero-bit state again by means of micrometric screw again, this moment, the reading of micrometer promptly was confirmed as datum readings, and write down measurement result on register.Then, loosen the micrometric screw parts downwards, take out the circular cone exemplar, the tested conical workpiece of packing into.At the reading of writing down on the minute book on all the other two clock gauges and the micrometer, twice difference of reading on the micrometer when adjusting the circular cone exemplar and measuring conical workpiece can be evaluated the error of designing and calculating diameter d.If reading is big for the first time for the second time, just show that tested circular cone d ' is just big than circular cone exemplar d ', vice versa.Difference of reading when the actual numerical value of tested circular cone diameter error can be by measuring workpieces and circular cone exemplar on the micrometer calculates.The difference of reading of first and the 3rd clock gauge can be evaluated the linear value error at circular cone oblique angle.On datum length (promptly by demarcated length) l, the actual size of tested circular cone oblique angle linear value error can calculate according to the difference of reading of the 3rd and first clock gauge.The reading of a middle clock gauge, the shape error of the tested element of cone of decidable, if its read-around ratio zero is big, the bus convexity is cydariform; If its read-around ratio zero is little, the recessed shape of a saddle that is of bus.Can measure the shape of three lateral cross section and two longitudinal cross-sections on the conical workpiece in case of necessity, on two longitudinal cross-sections, measure at least.After each the measurement, measured circle awl half-twist be made, the four measuring result can be obtained like this.Just can determine the flatness error of ovality, the saddle shaped curvature in the longitudinal cross-section, cydariform degree and the bus of conical workpiece in view of the above.By adjusting micrometric screw length, change the supporting contact and the guidance contacts of different length, can measure the cone of different-diameter and length.This measurement mechanism is simple in structure, can measure the error of the whole major parameters of outer conical surface, and has higher measuring accuracy.

    A kind of adjustable outer cone survey instrument of the present utility model is compared with prior art has following beneficial effect:

    A kind of adjustable outer cone survey instrument of the present utility model during measurement, all is transferred to zero-bit by standard circular cone exemplar with three clock gauges earlier, and this moment, the reading of micrometer promptly was confirmed as datum readings.Then, loosen the micrometric screw parts downwards, take out the circular cone exemplar, the tested conical workpiece of packing into.Determine the flatness error of ovality, the saddle shaped curvature in the longitudinal cross-section, cydariform degree and the bus of conical workpiece according to the difference of reading of 3 clock gauges.This measurement mechanism is simple in structure, can measure the error of the whole major parameters of outer conical surface, and has higher measuring accuracy.

    Description of drawings

    Below in conjunction with the drawings and specific embodiments the utility model is further specified.

    Fig. 1 is the structural representation of a kind of adjustable outer cone survey instrument of the utility model.

    Among the figure: support 1, supporting contact 2, framework 3, collet 5, clock gauge 6, micrometric screw 7, spline pin 8, micrometer 9, L shaped armed lever 10, screw 11, conical dowel pin 12.

    Embodiment

    According to shown in Figure 1, according to shown in Figure 1, this adjustable outer cone survey instrument is made up of support 1, supporting contact 2, framework 3, collet 5, clock gauge 6, micrometric screw 7, spline pin 8, micrometer 9, L shaped armed lever 10, screw 11, conical dowel pin 12.Two knife edge contacts and two guidance contacts with spline structure are arranged on the framework in support, and guidance contacts is installed in and supports contact and become 90 ° side, and the ratio of two guidance contacts mounting distances and difference in height and the installation of supporting contact are consistent; Clock gauge is fixed on the framework by collet.Described framework two ends are connected with the micrometric screw parts, and micrometric screw acts on the both ends of the surface of tested circular cone by the spherical contact of its front end, can do axially displaced on guiding device.The described whole micrometric screw parts of spline pin and micrometer that comprise are installed on the L shaped armed lever together, and L shaped armed lever is fixed on the framework by means of screw and conical dowel pin.

    A kind of adjustable cone shape measure instrument of the present utility model before the measuring workpieces, all is transferred to zero-bit by standard circular cone exemplar with three clock gauges 6 earlier.When in measurement mechanism, laying the circular cone exemplar, must unclamp screw 11 and take out conical dowel pin 12.Like this, L shaped armed lever 10 just can change 90 ° of pendulum around screw 11 axis, and tested circular cone exemplar is put in the device from right to left gradually, makes the pointer of three clock gauges 6 all be aligned to zero-bit under the situation that turns over a circle.Mobile from left to right then circular cone 0.05~0.10mm, and make it turn back to initial zero-bit state again by means of micrometric screw 7 again, this moment, the reading of micrometer 9 promptly was confirmed as datum readings, and write down measurement result on register.Then, loosen the micrometric screw parts downwards, take out the circular cone exemplar, the tested conical workpiece of packing into.At the reading of writing down on the minute book on all the other two clock gauges 6 and the micrometer 9, twice difference of reading on the micrometer 9 when adjusting the circular cone exemplar and measuring conical workpiece 4 can be evaluated the error of designing and calculating diameter d.If reading is big for the first time for the second time, just show that the d ' of tested circular cone 4 is just big than circular cone exemplar d ', vice versa.Difference of reading when the actual numerical value of tested circular cone 4 diameter error can be by measuring workpieces and circular cone exemplar on the micrometer 9 calculates.The difference of reading of first and the 3rd clock gauge 6 can be evaluated the linear value error at circular cone oblique angle.On datum length (promptly by demarcated length) l, the actual size of tested circular cone oblique angle linear value error can calculate according to the difference of reading of the 3rd and first clock gauge 6.The reading of a middle clock gauge 6, the shape error of tested circular cone 4 buses of decidable, if its read-around ratio zero is big, the bus convexity is cydariform; If its read-around ratio zero is little, the recessed shape of a saddle that is of bus.Can measure the shape of three lateral cross section and two longitudinal cross-sections on the conical workpiece 4 in case of necessity, on two longitudinal cross-sections, measure at least.After each the measurement, measured circle awl half-twist be made, the four measuring result can be obtained like this.Just can determine the flatness error of ovality, the saddle shaped curvature in the longitudinal cross-section, cydariform degree and the bus of conical workpiece 4 in view of the above.By adjusting micrometric screw 7 length, change the supporting contact 2 and the guidance contacts of different length, can measure the cone 4 of different-diameter and length.This measurement mechanism is simple in structure, can measure the error of the whole major parameters of outer conical surface, and has higher measuring accuracy.

    Claims (3)

    1. adjustable outer cone survey instrument, it is characterized in that: its structure comprises support, framework, supporting contact, collet, clock gauge, guidance contacts, micrometer, L shaped armed lever; Two knife edge contacts and two guidance contacts with spline structure are arranged on the framework in support, and guidance contacts is installed in and supports contact and become 90 ° side, and the ratio of two guidance contacts mounting distances and difference in height and the installation of supporting contact are consistent; Clock gauge is fixed on the framework by collet.
    2. a kind of adjustable outer cone survey instrument according to claim 1, it is characterized in that: described framework two ends are connected with the micrometric screw parts, micrometric screw acts on the both ends of the surface of tested circular cone by the spherical contact of its front end, can do axially displaced on guiding device.
    Citizens
    3. a kind of adjustable outer cone survey instrument according to claim 2, it is characterized in that: the described whole micrometric screw parts of spline pin and micrometer that comprise are installed on the L shaped armed lever together, and L shaped armed lever is fixed on the framework by means of screw and conical dowel pin.
    CNU2008200209286U2008-04-172008-04-17Adjustable outer cone measuring tool CN201193943Y (en)

    Priority Applications (1)

    Application NumberPriority DateFiling DateTitle
    CNU2008200209286UCN201193943Y (en) 2008-04-172008-04-17Adjustable outer cone measuring tool

    Publications (1)

    Publication NumberPublication Date
    CNU2008200209286UCN201193943Y (en) 2008-04-172008-04-17Adjustable outer cone measuring tool

    Country Status (1)

    Micrometric Laptops For Video Editing
    • 2008-04-17CNCNU2008200209286Upatent/CN201193943Y/ennot_activeIP Right Cessation

    Cited By (10)

    CountryLink
    CN101672618B (en) *2009-09-212011-03-30江阴江顺精密机械零部件有限公司Test device for conical surface of outer cone
    CN102645148A (en) *2012-04-242012-08-22郑州市钻石精密制造有限公司Special measuring tool for 10-degree conical surface of HFS-10 handle
    CN103063183A (en) *2013-01-112013-04-24洛阳轴研科技股份有限公司Method of measuring outer diameter tolerance and ovality of thin-walled loop
    CN109556497A (en) *2018-11-282019-04-02武汉武船重型装备工程有限责任公司A kind of detection device and method for stage reel
    * Cited by examiner, † Cited by third party
    Publication numberPriority datePublication dateAssigneeTitle
    CN102538633A (en) *2011-12-142012-07-04莱芜钢铁集团有限公司Method for measuring precision cone
    CN102967207A (en) *2012-11-142013-03-13无锡麦铁精密机械制造有限公司Measuring tool for outer circle jumping
    CN103063183A (en) *2013-01-112013-04-24洛阳轴研科技股份有限公司Method of measuring outer diameter tolerance and ovality of thin-walled loop
    CN106338230A (en) *2016-08-292017-01-18骆驼集团华南蓄电池有限公司Lead-acid storage battery terminal taper detection method
    CN110145999A (en) *2019-06-172019-08-20郑州机械研究所有限公司A kind of method of the taper of circular conical surface on inspection center axis

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    Granted publication date: 20090211

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    C14Grant of patent or utility model
    C17Cessation of patent right

    Micrometric precision of prosthetic dental crowns obtained by optical scanning and computer-aided designing/computer-aided manufacturing system

    Abstract

    The current study evaluated prosthetic dental crowns obtained by optical scanning and a computer-aided designing/computer-aided manufacturing system using micro-computed tomography to compare the marginal fit. The virtual models were obtained with four different scanning surfaces: typodont (T), regular impressions (RI), master casts (MC), and powdered master casts (PMC). Five virtual models were obtained for each group. For each model, a crown was designed on the software and milled from feldspathic ceramic blocks. Micro-CT images were obtained for marginal gap measurements and the data were statistically analyzed by one-way analysis of variance followed by Tukey's test. The mean vertical misfit was T=62.6±65.2 μm; MC=60.4±38.4 μm; PMC=58.1±38.0 μm, and RI=89.8±62.8 μm. Considering a percentage of vertical marginal gap of up to 75 μm, the results were T=71.5%, RI=49.2%, MC=69.6%, and PMC=71.2%. The percentages of horizontal overextension were T=8.5%, RI=0%, MC=0.8%, and PMC=3.8%. Based on the results, virtual model acquisition by scanning the typodont (simulated mouth) or MC, with or without powder, showed acceptable values for the marginal gap. The higher result of marginal gap of the RI group suggests that it is preferable to scan this directly from the mouth or from MC.


    Micrometric Laptops & Desktops Driver Download

    Publication:
    Pub Date:
    August 2014
    DOI:
    10.1117/1.JBO.19.8.088003
    Bibcode:
    2014JBO....19h8003D