CN113983906A - Hole roundness measuring device - Google Patents
Hole roundness measuring device Download PDFInfo
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- CN113983906A CN113983906A CN202110441329.1A CN202110441329A CN113983906A CN 113983906 A CN113983906 A CN 113983906A CN 202110441329 A CN202110441329 A CN 202110441329A CN 113983906 A CN113983906 A CN 113983906A
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- measuring
- rod
- guide rod
- hole
- channel
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- 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
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
- G01B5/201—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures for measuring roundness
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- 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
- G01B5/003—Measuring of motor parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a measuring device for roundness of a hole, which comprises: the lower end of the measuring main rod is provided with a first right-angle channel and a second right-angle channel, each right-angle channel comprises a vertical channel and a horizontal channel which are mutually connected, and the port of each horizontal channel is positioned on the outer circumferential wall of the measuring main rod; the dial indicator bracket is provided with a dial indicator, and a measuring head of the dial indicator is contacted with the measuring block; the first measuring guide rod is vertically arranged below the measuring block and connected with the measuring block, and the lower end of the first measuring guide rod is inserted into the vertical channel of the first right-angle channel; the second measurement guide rod is vertically arranged below the dial indicator bracket and connected with the dial indicator bracket, and the lower end of the second measurement guide rod is inserted into the vertical channel of the second right-angle channel; the at least two measuring heads are respectively arranged at the end openings of the two channels and are attached to the inner wall of the hole to be measured; and the ball beads are arranged between each measuring head and the tail ends of the first measuring guide rod and the second measuring guide rod so as to transfer the horizontal position of the measuring head to the tail ends of the first measuring guide rod and the second measuring guide rod and convert the horizontal position of the measuring head into the vertical displacement of the first measuring guide rod and the second measuring guide rod.
Description
Technical Field
The invention relates to an auxiliary measuring device, in particular to a hole roundness measuring device.
Background
As is well known, an engine block is one of the core components of an engine, which plays a very important role in the engine. The cylinder hole in the engine cylinder body can play a role in pushing the piston connecting rod to do work after gasoline and air are mixed and exploded.
In order to ensure the airtightness between the cylinder bore and the piston in the engine block, the cylinder bore needs to have high accuracy. In the prior art, the manufacturing process for the cylinder bore generally employs: the process route of rough boring, fine boring and honing.
It should be noted that, after the fine boring operation is performed, the roundness dimension is mainly ensured by the rotation precision of the main shaft of the machine tool, and the roundness dimension has an important influence on the roundness of the subsequent honing. If the roundness error after finish boring is large, honing allowance is not uniform, partial cylinder hole honing allowance is insufficient and cannot be output easily, partial cylinder hole honing allowance is overlarge, honing oilstones are damaged, and particles fall off. Therefore, in order to ensure the roundness dimension of the hole after the finish boring operation, the roundness dimension of the cylinder hole after the finish boring needs to be measured quickly and accurately after machining.
Therefore, in order to solve the above problems in the prior art, some researchers have performed related optimization designs, and have obtained the following improvements:
1. as shown in fig. 1, the inside diameter dial indicator is measured in the longitudinal direction and the transverse direction respectively according to the operation of fig. 1, and the difference between the longitudinal and transverse measurements of the inside diameter dial indicator is taken as the roundness error.
2. The cylinder bore was measured with a three-coordinate measuring machine.
3. The cylinder bore was measured with a roundness meter.
However, the three improved schemes still have certain defects, when the inner diameter dial indicator is measured in the vertical direction and the horizontal direction respectively by adopting the scheme 1, the measuring process is complicated, the inner diameter dial indicator needs to swing left and right to find the diameter size, the inner diameter dial indicator needs to be repeatedly placed into a cylinder hole for many times, the operation is complicated, the two times of measurement are possibly not the same section, and the measurement error exists. When the scheme 2 and the scheme 3 are adopted, the cylinder holes are measured by using the three-coordinate measuring instrument and the roundness measuring instrument, the cylinder holes need to be sent to the measuring chamber, the measuring period is long, and the production efficiency is influenced.
Therefore, in order to solve the above problems in the prior art, the present invention is directed to a device for measuring roundness of a hole, which is different from the improvement in the prior art, and which can rapidly and accurately measure the error of roundness of a cylinder hole at a time through a reasonable structural design. The measuring device has the advantages of simple structure, convenience in maintenance, high measuring precision and convenience in use, and has very good popularization prospect and application value.
Disclosure of Invention
One of the objectives of the present invention is to provide a device for measuring roundness of a cylinder hole, which can rapidly and accurately measure the error of the roundness of the cylinder hole at a time through a reasonable structural design. The measuring device has the advantages of simple structure, convenience in maintenance, high measuring precision and convenience in use, and has very good popularization prospect and application value.
In order to achieve the above object, the present invention provides a device for measuring roundness of a hole, including:
the lower end of the measuring main rod is provided with a first right-angle channel and a second right-angle channel, each right-angle channel comprises a vertical channel and a horizontal channel which are mutually connected, and the port of each horizontal channel is positioned on the outer circumferential wall of the measuring main rod;
a dial indicator bracket;
the dial indicator is arranged on the dial indicator bracket;
the measuring block is contacted with a measuring head of the dial indicator;
the first measuring guide rod is vertically arranged below the measuring block and connected with the measuring block, and the lower end of the first measuring guide rod is inserted into the vertical channel of the first right-angle channel;
the second measuring guide rod is vertically arranged below the dial indicator bracket and is connected with the dial indicator bracket, and the lower end of the second measuring guide rod is inserted into the vertical channel of the second right-angle channel;
the at least two measuring heads are respectively arranged at the ports of the horizontal channels of the first right-angle channel and the second right-angle channel and are used for being attached to the inner wall of the hole to be measured;
the plurality of balls are correspondingly arranged between each measuring head and the tail end of the corresponding first measuring guide rod or the second measuring guide rod, so that the horizontal positions of the measuring heads are transmitted to the first measuring guide rod and the second measuring guide rod and converted into the vertical displacements of the first measuring guide rod and the second measuring guide rod.
Further, in the hole circularity measuring apparatus according to the present invention, the apparatus further includes at least three planar four-bar linkages each connected to the measuring main rod, wherein each of the planar four-bar linkages includes:
a pull rod arranged vertically;
the middle part of the first short rod is hinged with the lower end of the pull rod, and one end of the first short rod is hinged with the measuring main rod;
the upper end of the long rod is hinged with the other end of the first short rod;
and one end of the second short rod is hinged with the lower end of the long rod, and the other end of the second short rod is hinged with the measuring main rod.
Wherein, the pull rod pulls in the vertical direction to change the radial distance between the measuring main rod and the long rod.
Furthermore, in the device for measuring the roundness of the hole, provided by the invention, the long rod is provided with a support nail.
Furthermore, in the device for measuring the hole roundness, at least two support nails are arranged on each long rod.
Further, in the hole roundness measuring device of the present invention, the pull rod is provided with a step surface, a pull rod spring is sleeved outside each pull rod, and the pull rod spring is arranged between the step surface of the pull rod and the measuring main rod in a manner of abutting against the pull rod spring so as to apply an elastic force in the vertical direction.
Further, the apparatus for measuring hole circularity according to the present invention further includes:
the pressure plate is sleeved on the measuring main rod and arranged above the pull rod;
and the pressure plate spring is sleeved on the measuring main rod and is arranged between the pressure plate and the radial extending arm of the measuring main rod in a leaning manner.
Further, in the hole roundness measuring device of the present invention, the first measuring guide rod is provided with a step surface; the first measuring guide rod spring is sleeved on the periphery of the first measuring guide rod and is arranged between the step surface of the first measuring guide rod and the pressure plate in a propping mode.
Further, in the hole roundness measuring device of the present invention, the second measuring guide rod is provided with a step surface; the second measuring guide rod spring is sleeved on the periphery of the second measuring guide rod and is arranged between the step surface of the second measuring guide rod and the pressure plate in a propping mode.
Further, in the device for measuring the roundness of the hole, provided by the invention, a pressure plate handle is arranged on the pressure plate.
Further, in the hole roundness measuring apparatus according to the present invention, the top of the tie rod is hemispherical.
Compared with the prior art, the device for measuring the roundness of the hole has the following advantages and beneficial effects:
the measuring device provided by the invention can rapidly and accurately measure the roundness error of the cylinder hole at one time through reasonable structural design. The measuring device is simple in structure, convenient to maintain, high in measuring precision and convenient to use, can directly read the error of the hole roundness on the dial indicator, and has very good popularization prospect and application value.
In some preferred embodiments, the measuring device of the present invention may be provided with a parallelogram linkage structure to achieve fast and accurate positioning of the measuring device. Radial contraction can be controlled by adopting the parallelogram connecting rod structure of the pressure plate and the pull rod, so that the parallelogram connecting rod structure is contracted before the cylinder hole to be detected is placed in the cylinder hole, and the parallelogram connecting rod structure is automatically expanded radially under the action of the elastic element after the cylinder hole is placed in the cylinder hole.
Drawings
FIG. 1 shows a prior art schematic diagram of an internal diameter dial gauge operating to measure cylinder bore roundness in both the longitudinal and transverse directions, respectively.
Fig. 2 is a schematic structural diagram of a measuring apparatus for measuring the roundness of a hole according to an embodiment of the present invention at a viewing angle.
Fig. 3 is a schematic structural diagram of a device for measuring the roundness of a hole according to an embodiment of the present invention from another view angle.
Fig. 4 is a schematic structural diagram of a device for measuring the roundness of a hole according to an embodiment of the present invention from another viewing angle.
Fig. 5 is a partially enlarged view of the structure shown in fig. 4 at a.
Fig. 6 is a structural front profile of the device for measuring the roundness of the hole according to the present invention in one embodiment.
Fig. 7 is a cross-sectional view B-B of the structure shown in fig. 6.
Fig. 8 is a C-C sectional view of the structure shown in fig. 6.
Fig. 9 is a partially enlarged view of the structure shown in fig. 8 at D.
Detailed Description
The device for measuring the roundness of a hole according to the present invention will be further explained and illustrated with reference to the drawings and the specific examples, which, however, should not be construed to unduly limit the technical solution of the present invention.
Fig. 2 is a schematic structural diagram of a measuring apparatus for measuring the roundness of a hole according to an embodiment of the present invention at a viewing angle.
Fig. 3 is a schematic structural diagram of a device for measuring the roundness of a hole according to an embodiment of the present invention from another view angle.
Fig. 4 is a schematic structural diagram of a device for measuring the roundness of a hole according to an embodiment of the present invention from another viewing angle.
As can be seen from fig. 2, 3 and 4, in this embodiment, the measuring apparatus of the present invention may include: the device comprises a measuring main rod 1, a dial indicator bracket 3, a dial indicator 4, a measuring block 5, a first measuring guide rod 6 and a second measuring guide rod 7.
Correspondingly, as can be seen by further referring to fig. 2 and 3, in the present embodiment, the measuring apparatus of the present invention further includes three sets of planar four-bar linkages 2, and the three sets of planar four-bar linkages 2 are independent from each other and spaced apart by 120 degrees, and are all connected to the measuring main rod 1.
In the invention, the three groups of plane four-bar mechanisms 2 connected with the measuring main rod 1 can ensure that the axial lead of the measuring main rod 1 in the measuring device is parallel to the wall of the hole to be measured, realize the auxiliary positioning of the measuring device and ensure that the axial lead of the measuring device is parallel to the axial lead of the hole to be measured.
In the present embodiment, the parallelogram linkage 2 may include: a pull rod 201, a first short rod 202, a long rod 203 and a second short rod 204. Wherein, the pull rod 201 and the long rod 203 are vertically arranged, and the first short rod 202 and the second short rod 204 are transversely arranged. In the invention, the middle part of the first short rod 202 is hinged with the lower end of the pull rod 201, one end of the first short rod 202 is hinged with the measuring main rod 1, the upper end of the long rod 203 is hinged with the other end of the first short rod 204, one end of the second short rod 204 is hinged with the lower end of the long rod 203, the other end of the second short rod 204 is hinged with the measuring main rod 1, and the radial distance between the measuring main rod 1 and the long rod 203 is changed by pulling the pull rod 201 in the vertical direction.
In addition, in the present embodiment, each long rod 203 of the planar four-bar linkage 2 according to the present invention is provided with two support nails 2031 with equal height, which can be correspondingly installed in the hole of the long rod 203, and the two support nails 2031 can change the line contact between the long rod 203 and the hole wall to be measured into two-point contact, thereby eliminating the influence of the straightness of the hole to be measured on the auxiliary positioning of the measuring device.
In addition, as further shown in fig. 3, in the present embodiment, a step surface 205 is further disposed on the pull rod 201 in the planar four-bar linkage 2, and a pull rod spring 206 is sleeved outside each pull rod 201. Wherein, a pull rod spring 206 can be abuttingly provided between the step surface 205 of the pull rod 201 and the measuring main rod 1 to apply an elastic force in the vertical direction.
Correspondingly, in the embodiment, the measuring main rod 1 of the measuring device of the invention is further sleeved with a pressure plate 8 and a pressure plate spring 9, the pressure plate 8 is arranged above the pull rod 201 and can move up and down along the length direction of the measuring main rod 1; accordingly, the pressure plate spring 9 is disposed against the pressure plate 8 and the radially projecting arm 101 of the measuring boom 1.
In order to facilitate the operation of pressing down the pressure plate 8 by the operator, a pressure plate handle 801 is further provided on the pressure plate 8 according to the present invention.
As further shown in fig. 4, and also as shown in fig. 3, in the present embodiment, the first measurement guide rod 6 and the second measurement guide rod 7 of the present invention are further provided with a step surface 10. In the invention, a first measuring guide rod spring 11 is sleeved on the periphery of the first measuring guide rod 6 and is arranged between the step surface 10 of the first measuring guide rod 6 and the pressure plate 8 in an abutting mode; the second measuring guide rod spring 12 can also be sleeved on the periphery of the second measuring guide rod 7 and is arranged between the step surface 10 of the second measuring guide rod 7 and the pressure plate 8 in an abutting mode.
Fig. 5 is a partially enlarged view of the structure shown in fig. 4 at a.
As shown in fig. 5, in the present embodiment, the dial indicator 4 is provided on the dial indicator holder 3, and the measurement block 5 can be brought into contact with the gauge head 401 of the dial indicator 4.
Fig. 6 is a structural front profile of the device for measuring the roundness of the hole according to the present invention in one embodiment.
Fig. 7 is a cross-sectional view B-B of the structure shown in fig. 6.
Fig. 8 is a C-C sectional view of the structure shown in fig. 6.
As shown in fig. 6, 7 and 8, in the present embodiment, the lower end of the main measuring rod 1 is provided with a first right-angle channel and a second right-angle channel (not shown in the figure), wherein each right-angle channel includes a vertical channel 102 and a horizontal channel 103, which are connected to each other, and a port of the horizontal channel 103 is located on the outer circumferential wall of the main measuring rod 1.
As further shown in fig. 8, in the present embodiment, the top of the pull rod 201 in the planar four-bar linkage 2 of the measuring device of the present invention may be hemispherical.
It should be noted that, as can be seen by referring to fig. 6 and 8 in combination, in the measuring device of the present invention, the first measuring guide rod 6 may be vertically disposed below the measuring block 5 and connected to the measuring block 5, and the lower end of the first measuring guide rod 6 can be inserted into the vertical channel 102 of the first right-angle channel in the measuring main rod 1. In the measuring device according to the present invention, a second measuring guide 7 may also be vertically disposed below the dial indicator support 3 and connected to the dial indicator support 3, and a lower end of the second measuring guide 7 may be inserted into the vertical channel 102 of the second right-angle channel.
Fig. 9 is a partially enlarged view of the structure shown in fig. 8 at D.
As shown in fig. 9 and can be seen from fig. 4, in this embodiment, the measuring apparatus of the present invention further includes: a measuring head 13 and a ball 14.
In this embodiment, the measuring apparatus according to the present invention is provided with two measuring heads 13, and the two measuring heads 13 are respectively disposed at the ports of the horizontal channels 103 of the first right-angle channel and the second right-angle channel, and can be used for being attached to the inner wall of the hole to be measured.
It should be noted that, in the present invention, a plurality of balls 14 are provided, which are correspondingly provided between each measuring head 13 and the tail end of the corresponding first measuring guide rod 6 or second measuring guide rod 7, so as to transfer the horizontal position of the measuring head 13 to the first measuring guide rod 6 and second measuring guide rod 7 and convert the horizontal position into the vertical displacement of the first measuring guide rod 6 and second measuring guide rod 7.
When the measuring device is used for measuring the roundness of the hole, an operator can hold the measuring main rod 1 to press down the pressure plate 8, the pressure plate 8 presses down the three groups of plane four-bar mechanisms 2 to overcome the spring force of the pull rod spring 206 and press down the three groups of plane four-bar mechanisms 2, so that the three groups of plane four-bar mechanisms 2 deform and reduce the radial size to be placed in the hole to be measured, then the pressing force on the pressure plate 8 is released, the three groups of plane four-bar mechanisms 2 lift up the pull rod 201 under the spring force of the pull rod spring 206, the three groups of plane four-bar mechanisms 2 deform and expand the radial size, and the supporting nails 2031 arranged on each long rod 203 are supported on the inner wall of the hole to be measured, so that the auxiliary positioning of the measuring main rod 1 is completed.
At this moment, the measuring head 13 is attached to the inner wall of the hole to be measured, the measuring head 13 displaces in the horizontal position, and then the ball 14 is extruded, so that the ball 14 moves in the first right-angle channel and the second right-angle channel, the first measuring guide rod 6 and the second measuring guide rod 7 are driven to move in the vertical direction, the numerical value displayed by the dial indicator 4 is just the difference value of the diameters of the transverse and longitudinal holes to be measured, and the error of the roundness of the holes is directly read.
In conclusion, the measuring device provided by the invention can rapidly and accurately measure the error of the roundness of the cylinder hole at one time through reasonable structural design. The measuring device has the advantages of simple structure, convenience in maintenance, high measuring precision and convenience in use, and has very good popularization prospect and application value.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradicted by each other.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention.
Claims (10)
1. A device for measuring the roundness of a hole, comprising:
the lower end of the measuring main rod is provided with a first right-angle channel and a second right-angle channel, each right-angle channel comprises a vertical channel and a horizontal channel which are mutually connected, and the port of each horizontal channel is positioned on the outer circumferential wall of the measuring main rod;
a dial indicator bracket;
the dial indicator is arranged on the dial indicator bracket;
the measuring block is contacted with a measuring head of the dial indicator;
the first measuring guide rod is vertically arranged below the measuring block and connected with the measuring block, and the lower end of the first measuring guide rod is inserted into the vertical channel of the first right-angle channel;
the second measuring guide rod is vertically arranged below the dial indicator bracket and is connected with the dial indicator bracket, and the lower end of the second measuring guide rod is inserted into the vertical channel of the second right-angle channel;
the at least two measuring heads are respectively arranged at the ports of the horizontal channels of the first right-angle channel and the second right-angle channel and are used for being attached to the inner wall of the hole to be measured;
the plurality of balls are correspondingly arranged between each measuring head and the tail end of the corresponding first measuring guide rod or the second measuring guide rod, so that the horizontal positions of the measuring heads are transmitted to the first measuring guide rod and the second measuring guide rod and converted into the vertical displacements of the first measuring guide rod and the second measuring guide rod.
2. The hole circularity measuring apparatus of claim 1, further comprising at least three planar four-bar linkages each connected to said measuring main rod, wherein each of said planar four-bar linkages comprises:
a pull rod arranged vertically;
the middle part of the first short rod is hinged with the lower end of the pull rod, and one end of the first short rod is hinged with the measuring main rod;
the upper end of the long rod is hinged with the other end of the first short rod;
and one end of the second short rod is hinged with the lower end of the long rod, and the other end of the second short rod is hinged with the measuring main rod.
Wherein, the pull rod pulls in the vertical direction to change the radial distance between the measuring main rod and the long rod.
3. The hole roundness measuring apparatus of claim 2 wherein the elongate bar is provided with support pins.
4. The apparatus for measuring the roundness of holes according to claim 3, wherein each of said long rods is provided with at least two support pins.
5. The hole roundness measuring apparatus according to claim 2, wherein the pull rod is provided with a step surface, and each pull rod is externally fitted with a pull rod spring which is abuttingly provided between the step surface of the pull rod and the measuring main rod to apply an elastic force in a vertical direction.
6. The apparatus for measuring the roundness of a hole according to claim 5, further comprising:
the pressure plate is sleeved on the measuring main rod and arranged above the pull rod;
and the pressure plate spring is sleeved on the measuring main rod and is arranged between the pressure plate and the radial extending arm of the measuring main rod in a leaning manner.
7. The hole roundness measuring apparatus of claim 6 wherein the first measuring guide is provided with a stepped surface; the first measuring guide rod spring is sleeved on the periphery of the first measuring guide rod and is arranged between the step surface of the first measuring guide rod and the pressure plate in a propping mode.
8. The hole roundness measuring apparatus of claim 6 wherein the second measurement guide bar is provided with a stepped surface; the second measuring guide rod spring is sleeved on the periphery of the second measuring guide rod and is arranged between the step surface of the second measuring guide rod and the pressure plate in a propping mode.
9. The apparatus for measuring bore circularity of claim 6, wherein said pressure plate is provided with a pressure plate handle.
10. The hole roundness measurement apparatus of claim 2 wherein the top of the tie rod is hemispherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441329.1A CN113983906B (en) | 2021-04-23 | 2021-04-23 | Hole roundness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441329.1A CN113983906B (en) | 2021-04-23 | 2021-04-23 | Hole roundness measuring device |
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| Publication Number | Publication Date |
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| CN113983906A true CN113983906A (en) | 2022-01-28 |
| CN113983906B CN113983906B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110441329.1A Active CN113983906B (en) | 2021-04-23 | 2021-04-23 | Hole roundness measuring device |
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| Country | Link |
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| CN (1) | CN113983906B (en) |
Citations (10)
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|---|---|---|---|---|
| GB1038117A (en) * | 1964-08-24 | 1966-08-03 | Eisele Andrew | Internal-and external surface concentricity gauge |
| JPS57124201A (en) * | 1981-01-27 | 1982-08-03 | Nippon Kokan Kk <Nkk> | Measuring device for out of roundness of tube |
| WO1988008511A1 (en) * | 1987-04-27 | 1988-11-03 | Gordon Richard T | Method of and an apparatus for checking out-of-roundness |
| US5117081A (en) * | 1991-04-01 | 1992-05-26 | Armco Inc. | Roll roundness measuring and machining apparatus and method |
| US20010029677A1 (en) * | 2000-04-12 | 2001-10-18 | Bidwell Steven T. | Gage set for measuring inside and outside diameters of ring shaped parts |
| CN208171128U (en) * | 2018-05-24 | 2018-11-30 | 上汽大众汽车有限公司 | Measurement matching sample rack is covered outside white body |
| JP2019132772A (en) * | 2018-02-01 | 2019-08-08 | 株式会社東京精密 | Detector and roundness measuring machine |
| CN111121600A (en) * | 2019-12-31 | 2020-05-08 | 广德锦汭轴承有限公司 | Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile |
| CN111412821A (en) * | 2020-04-13 | 2020-07-14 | 宁波真格液压科技有限公司 | New energy automobile brake drum processing device |
| CN112161542A (en) * | 2020-09-22 | 2021-01-01 | 刘先凤 | Auxiliary detection device for shaft sleeve |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1038117A (en) * | 1964-08-24 | 1966-08-03 | Eisele Andrew | Internal-and external surface concentricity gauge |
| JPS57124201A (en) * | 1981-01-27 | 1982-08-03 | Nippon Kokan Kk <Nkk> | Measuring device for out of roundness of tube |
| WO1988008511A1 (en) * | 1987-04-27 | 1988-11-03 | Gordon Richard T | Method of and an apparatus for checking out-of-roundness |
| US5117081A (en) * | 1991-04-01 | 1992-05-26 | Armco Inc. | Roll roundness measuring and machining apparatus and method |
| US20010029677A1 (en) * | 2000-04-12 | 2001-10-18 | Bidwell Steven T. | Gage set for measuring inside and outside diameters of ring shaped parts |
| JP2019132772A (en) * | 2018-02-01 | 2019-08-08 | 株式会社東京精密 | Detector and roundness measuring machine |
| CN208171128U (en) * | 2018-05-24 | 2018-11-30 | 上汽大众汽车有限公司 | Measurement matching sample rack is covered outside white body |
| CN111121600A (en) * | 2019-12-31 | 2020-05-08 | 广德锦汭轴承有限公司 | Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile |
| CN111412821A (en) * | 2020-04-13 | 2020-07-14 | 宁波真格液压科技有限公司 | New energy automobile brake drum processing device |
| CN112161542A (en) * | 2020-09-22 | 2021-01-01 | 刘先凤 | Auxiliary detection device for shaft sleeve |
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| 张集胜: "齿圈圆度自动检测线", 《科技成果》 * |
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|---|---|
| CN113983906B (en) | 2023-09-22 |
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