CN211503999U - Roundness measuring instrument self-centering device and high-speed roundness measuring instrument - Google Patents
Roundness measuring instrument self-centering device and high-speed roundness measuring instrument Download PDFInfo
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- CN211503999U CN211503999U CN202021596069.2U CN202021596069U CN211503999U CN 211503999 U CN211503999 U CN 211503999U CN 202021596069 U CN202021596069 U CN 202021596069U CN 211503999 U CN211503999 U CN 211503999U
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Abstract
The utility model discloses a roundness measuring instrument self-centering device and a high-speed roundness measuring instrument, which comprises an operation platform, wherein an air-flotation rotating magnetic table for adsorbing a measured workpiece is arranged on the operation platform, and at least three centering components for radially pushing the measured workpiece to move are uniformly distributed on the operation platform along the circumferential direction of the air-flotation rotating magnetic table; the operation platform is provided with a synchronous driving device which drives all the centering components to move inwards or outwards simultaneously; the synchronous driving device comprises a driving bevel gear which is coaxially arranged with the air-floatation rotary magnetic table, the driving bevel gear is rotatably arranged at the bottom of the operating platform, and a driven bevel gear which is in meshing transmission with the driving bevel gear is rotatably arranged on the centering assembly; an automatic driving device is arranged between the operating platform and the driving bevel gear; the utility model has the advantages of simple structure and reasonable design, through the automatic centering of synchronous drive device and centering subassembly quick and accurate completion work piece, no longer need artificial adjustment, consequently adjustment efficiency obviously obtains promoting, and can effectively improve the degree of accuracy of work piece circularity.
Description
Technical Field
The utility model belongs to the technical field of the roundness measuring equipment, especially, relate to a roundness measuring equipment is from centring means.
Background
The roundness measuring instrument is a measuring tool for measuring roundness errors of workpieces by a rotating shaft method. The roundness measuring instrument is divided into a sensor rotary type and a workbench rotary type. During measurement, a measured piece and a precision shaft system are concentrically arranged, and the precision shaft system drives an inductive length sensor or a workbench to do precise circular motion. In order to meet the requirements of bearing production, a bearing roundness measuring instrument, also called a high-speed roundness measuring instrument, is provided in the prior art, and has the advantages of high efficiency, high precision, simple structure, low price, suitability for production field use and the like.
The high-speed roundness measuring instrument is mainly used for measuring the roundness of a bearing, and before measurement, the bearing is fixedly arranged on a rotating magnetic table; during measurement, the magnetic table rotates at a high speed, the sensor (probe) contacts the outer peripheral surface of the bearing, and the outer peripheral surface of the bearing is measured; the rotation speed of the magnetic table is high, and the workpiece to be measured can be measured only by keeping the workpiece to be measured concentric with the magnetic table, namely the workpiece to be measured and the rotating magnetic table have high coaxiality; therefore, before measurement, concentricity adjustment needs to be carried out on a workpiece to be measured, in the prior art, adjustment is mainly carried out through observation and matching of hands and eyes, precision adjustment cannot be carried out, a long time is needed for completing a centering process, and the measurement efficiency of the bearing roundness measuring instrument is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a roundness measuring equipment is from centring means and high-speed roundness measuring equipment of simple structure, reasonable in design, quick and accurate self-centering is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: the roundness meter self-centering device comprises an operation platform, wherein an air-floatation rotating magnetic table for adsorbing a measured workpiece is arranged on the operation platform, and at least three centering assemblies for radially pushing the measured workpiece to move are uniformly distributed on the operation platform along the circumferential direction of the air-floatation rotating magnetic table; and the operating platform is provided with a synchronous driving device which drives the centering assemblies to move inwards or outwards simultaneously.
As a preferred technical scheme, the synchronous driving device comprises a driving bevel gear coaxially arranged with the air-floatation rotary magnetic table, the driving bevel gear is rotatably mounted at the bottom of the operating platform, and a driven bevel gear in meshing transmission with the driving bevel gear is rotatably mounted on the centering assembly; an automatic driving device is arranged between the operating platform and the driving bevel gear.
As a preferable technical scheme, the automatic driving device comprises a centering motor fixedly installed on the operating platform, a driving gear is installed at the output end of the centering motor, and a driven gear ring in meshing transmission with the driving gear is arranged on the periphery of the driving bevel gear.
As a preferable technical scheme, the centering assembly further comprises a centering holder which is slidably mounted on the operating platform, a centering screw is mounted on the centering holder through thread fit, the driven bevel gear is fixedly mounted at one end of the centering screw, and a centering push rod which radially pushes the workpiece to be measured to move is further mounted on the centering holder.
Preferably, a tact switch is arranged at the end part of the centering push rod, which is in contact with the surface of the workpiece to be measured.
Preferably, the driving bevel gear is rotatably mounted on the operating platform through a bearing.
As a preferred technical scheme, a centering sliding groove is formed in the operating platform, and a centering sliding rail matched with the centering sliding groove is arranged on the centering assembly.
As an optimized technical scheme, the high-speed roundness measuring device comprises a roundness measuring device base and a roundness measuring device self-centering device, wherein the roundness measuring device self-centering device is installed on the roundness measuring device base.
By adopting the technical scheme, the roundness measuring device self-centering device comprises an operation platform, wherein an air-floatation rotary magnetic table for adsorbing a measured workpiece is arranged on the operation platform, and at least three centering assemblies for radially pushing the measured workpiece to move are uniformly distributed on the operation platform along the circumferential direction of the air-floatation rotary magnetic table; the operation platform is provided with a synchronous driving device which drives the centering components to move inwards or outwards simultaneously; the utility model has the advantages that: before measurement, firstly, the workpiece to be measured is placed on the upper surface of the air-floatation rotary magnetic table, then the synchronous driving device is adjusted to drive all the centering assemblies to move inwards at the same time, the centering assemblies push the workpiece to be measured to move in the radial direction, when all the centering assemblies are not in full contact with the workpiece to be measured, the centering assemblies in contact with the workpiece to be measured push the workpiece to continue to move until all the centering assemblies are in contact with the workpiece to be measured, at the moment, the axis of the workpiece to be measured corresponds to the axis of the air-floatation rotary magnetic table, and the workpiece is centered; then the synchronous driving device drives each centering assembly to move outwards simultaneously, so that the centering assemblies are far away from the workpiece to be measured; and then starting a roundness measuring instrument, adsorbing the workpiece to be measured by the air-floatation rotating magnetic table through magnetic force, namely fixing the workpiece to be measured, and finally measuring the roundness of the workpiece to be measured. The utility model has the advantages of simple structure and reasonable design, through synchronous drive device and the automatic centering of work piece is accomplished to quick and the accuracy of centering subassembly, no longer needs artificial adjustment, consequently adjustment efficiency obviously obtains promoting, and the accuracy that can effectively improve the work piece circularity of centering accuracy.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural view of another angle of the embodiment of the present invention;
fig. 3 is a front view of an embodiment of the present invention;
fig. 4 is a side view of an embodiment of the invention;
fig. 5 is a schematic view of an embodiment of the invention before centering;
fig. 6 is a schematic view of the embodiment of the present invention after centering;
fig. 7 is a schematic structural diagram of a high-speed roundness measuring instrument according to an embodiment of the present invention;
fig. 8 is a circuit diagram of an embodiment of the present invention for self-centering;
in the figure: 1-an operation platform; 2-air-floating rotary magnetic table; 3-a centering assembly; 31-centering holder; 32-a centering screw; 33-centering the push rod; 4-a synchronous drive; 41-a driving bevel gear; 42-a passive bevel gear; 43-centering motor; 44-a drive gear; 45-passive gear ring; 5-the workpiece to be detected; 6-centering the chute; 7-roundness measuring apparatus base; 8-roundness measuring equipment upright column; 9-a sliding arm; 10-a mounting arm; 11-Probe.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
Referring to fig. 7, the high-speed roundness measuring apparatus comprises a roundness measuring apparatus base 7, a roundness measuring apparatus self-centering device is installed on the roundness measuring apparatus base 7, a roundness measuring apparatus upright post 8 is further installed on the roundness measuring apparatus base 7, the roundness measuring apparatus upright post 8 is vertically arranged on the roundness measuring apparatus base 7, a sliding arm 9 is arranged on the roundness measuring apparatus upright post 8, an installation arm 10 is arranged at the outer end of the sliding arm 9, a probe 11 is arranged on the installation arm 10, the probe 11 is arranged right above the roundness measuring apparatus self-centering device, and the probe 11 is used for carrying out roundness measurement on a workpiece to be measured on an air flotation rotating magnetic table. In the embodiment, a roundness measuring instrument self-centering device is additionally arranged on the basis of a high-speed roundness measuring instrument in the prior art, so that the roundness measuring instrument has the function of automatically centering a workpiece.
As shown in fig. 1 to 7, the roundness measuring apparatus self-centering device includes an operation platform 1, the operation platform 1 is mounted on a roundness measuring apparatus base 7 through a bracket, an air-floating rotary magnetic table 2 for adsorbing a measured workpiece 5 is mounted on the operation platform 1, a bottom end of the air-floating rotary magnetic table 2 is mounted on the roundness measuring apparatus base 7, the air-floating rotary magnetic table 2 is a known component in the prior art, and therefore, a specific structure and a mounting manner thereof are not described herein; at least three centering assemblies 3 which radially push a workpiece 5 to be measured to move are uniformly distributed on the operating platform 1 along the circumferential direction of the air-floatation rotary magnetic table 2; the operation platform 1 is provided with a synchronous driving device 4 which drives each centering component 3 to move inwards or outwards simultaneously. Before measurement, firstly, the workpiece 5 to be measured is placed on the upper surface of the air-floating rotary magnetic table 2, then the synchronous driving device 4 is adjusted to drive each centering assembly 3 to move inwards at the same time, the centering assemblies 3 push the workpiece 5 to be measured to move in the radial direction, when all the centering assemblies 3 are not in full contact with the workpiece 5 to be measured, referring to fig. 5, the centering assemblies 3 in contact with the workpiece 5 to be measured push the workpiece 5 to continue to move until all the centering assemblies 3 are in contact with the workpiece 5 to be measured, referring to fig. 6, at this time, the axis of the workpiece 5 to be measured corresponds to the axis of the air-floating rotary magnetic table 2, and the workpiece is centered; then the synchronous driving device 4 drives each centering assembly 3 to move outwards simultaneously, so that the centering assemblies 3 are far away from the workpiece 5 to be measured; and then starting a roundness measuring instrument, enabling the air-floatation rotary magnetic table 2 to adsorb the workpiece 5 to be measured through magnetic force, namely fixing the workpiece 5 to be measured, and finally measuring the roundness of the workpiece 5 to be measured, wherein the measuring method is the same as that of the roundness measuring instrument in the prior art, the workpiece 5 to be measured is driven by the air-floatation rotary magnetic table 2 to rotate at a high speed, and a probe 11 on the roundness measuring instrument is used for measuring the roundness of the peripheral surface of the workpiece 5 to be measured. The utility model has the advantages of simple structure and reasonable design, through synchronous drive device 4 and the automatic centering of work piece is accomplished to quick and accuracy of centering subassembly 3, no longer needs artificial adjustment, therefore adjustment efficiency obviously obtains promoting, and the accuracy that can effectively improve the work piece circularity of centering accuracy.
In the present embodiment, the workpiece 5 to be measured is a bearing, but may be other rotating parts.
In this embodiment, three centering assemblies 3 are provided, which are arranged at 120 ° with respect to each other, and three centering assemblies 3 are provided, which are uniformly arranged at the periphery of the air-bearing rotary magnetic table 2, and the three centering assemblies 3 enclose a circle, the center of which coincides with the axis of the air-bearing rotary magnetic table 2. Of course, the centering assemblies 3 are not limited to three, and may be four or more.
The synchronous driving device 4 comprises a driving bevel gear 41 coaxially arranged with the air-flotation rotary magnetic table 2, in this embodiment, the driving bevel gear 41 is arranged at the periphery of the air-flotation rotary magnetic table 2, the driving bevel gear 41 is rotatably installed at the bottom of the operating platform 1 through a bearing to ensure the rotation of the driving bevel gear 41, and a driven bevel gear 42 in meshing transmission with the driving bevel gear 41 is rotatably installed on the centering assembly 3. When the size of the workpiece to be measured is small, the driving bevel gear 41 can be manually rotated to realize manual adjustment; however, when the size of the workpiece to be measured is large or in order to ensure the convenience of positioning, the present embodiment adopts an automatic adjustment manner, that is, an automatic driving device is arranged between the operating platform 1 and the driving bevel gear 41. The synchronous driving device 4 is located below the operating platform 1, one part of the centering assembly 3 is located below the operating platform 1, and the other part of the centering assembly extends to above the operating platform 1, and is used for centering the workpiece 5 to be measured. During centering adjustment, the automatic driving device acts to drive the driving bevel gear 41 to rotate, the driving bevel gear 41 is engaged with the driven bevel gear 42 to drive the driven bevel gear 42 to rotate, and the driven bevel gear 42 is arranged on the centering assembly 3, so that the centering assembly 3 moves linearly along the operating platform 1, that is, the workpiece 5 to be measured is pushed radially. The driving bevel gear 41 and the driven bevel gear 42 are vertically arranged, that is, two bevel gears which are matched with each other are adopted, and the transmission mode is well known to those skilled in the art.
The driving bevel gear 41 and the air-floatation rotary magnetic table 2 are coaxially arranged, and the driven bevel gears 42 are uniformly distributed on the periphery of the driving bevel gear 41.
The automatic driving device comprises a centering motor 43 fixedly installed on the operating platform 1, a driving gear 44 is installed at the output end of the centering motor 43, a driven gear ring 45 in meshing transmission with the driving gear 44 is arranged on the periphery of the driving bevel gear 41, and the driven gear ring 45 is fixed on the periphery of the driving bevel gear 41. When the centering motor 43 rotates, the driving gear 44 is driven to rotate, and since the driving gear 44 is meshed with the driven gear ring 45, the driving gear 44 rotates to drive the driven gear ring 45 to rotate, i.e. the driving bevel gear 41 rotates.
Centering subassembly 3 still includes slidable mounting and is in centering holder 31 on the operation platform 1, install centering screw 32 through screw-thread fit on the centering holder 31, centering screw 32 passes through the thread tightening and installs constitute an overall structure on the centering holder 31, passive bevel gear 42 fixed mounting is in centering screw 32's one end, still install the centering push rod 33 that radial promotion was surveyed workpiece 5 and removed on the centering holder 31. The top end of the centering holder 31 is located above the operating platform 1, the centering push rod 33 is installed at the top end of the centering holder 31, and the centering screw 32 is installed at the bottom end of the centering holder 31 and below the operating platform 1, so that the driven bevel gear 42 is matched with the driving bevel gear 41. When the driven bevel gear 42 is driven by the driving bevel gear 41 to rotate, the centering screw 32 is rotated, and because the centering screw 32 is in threaded fit with the centering holder 31, and the centering holder 31 is slidably mounted on the operating platform 1, when the centering screw 32 rotates, the centering holder 31 is pushed to slide inwards or outwards, that is, the centering push rod 33 is driven to slide inwards or outwards, and when the centering push rod 33 moves inwards, that is, the workpiece 5 to be measured is centered.
Be provided with centering spout 6 on the operation platform 1, be provided with on the centering subassembly 3 with centering 6 complex centering slide rail of spout, centering holder 31 passes through centering 6 and centering slide rail's cooperation are installed operation platform 1 is last, guarantees centering subassembly 3 only along operation platform 1 is linear motion.
The roundness measuring equipment self-centering device further comprises an automatic controller, wherein the automatic controller is connected with the centering motor 43 to control the rotation direction, the starting and the stopping of the centering motor 43. The outer end (the end part contacted with the surface of the workpiece 5 to be measured) of each centering push rod 33 is provided with a touch switch which is used as a sensor and is electrically connected with the automatic controller. When the centering push rod 33 moves towards the surface of the workpiece 5 to be measured, the tact switches are turned on after the tact switches contact the surface of the workpiece 5 to be measured, when all three tact switches are turned on, referring to fig. 6, it represents that centering adjustment of the workpiece 5 to be measured is completed, the centering motor 43 is controlled to stop operating, when only one or two tact switches are turned on, referring to fig. 5, it represents that the workpiece 5 to be measured is not centered, at this time, the centering motor 43 continues to operate, and each centering push rod 33 continues to move inwards until all three tact switches are turned on.
Referring to fig. 8, which is a schematic diagram of circuit control, the three tact switches are connected to an and circuit, the three tact switches are respectively S1, S2, and S3, and when a voltage of 5V is applied between the pins 2 and 5, the device can operate, that is, the centering motor 43 is started; 1. the 3 and 4 pins are input pins, and the 4 pins have certain driving capability, so that the on-off of the power supply control circuit can be driven or some small relays can be driven. The power supply control circuit can be an H bridge or a CMOS tube; when all the pins 1, 3, and 4 are at high potential, that is, after all the pins are turned on, the output of the pin 4 is 1, and the centering motor 43 is stopped.
The working principle of the embodiment is as follows:
referring to fig. 7, a workpiece 5 to be measured is placed on the air-floatation rotary magnetic table 2, then the centering motor 43 rotates to drive the driving gear 44 to rotate, and the driving bevel gear 41 is driven to rotate due to the engagement of the driving gear 44 and the driven gear ring 45, so that each driven bevel gear 42 rotates around its own axis, thereby pushing the centering holder 31 to move towards the surface of the workpiece 5 to be measured; all the centering holders 31 move inwards at the same time to drive the centering push rod 33 to move towards the workpiece 5 to be measured, and when all the three tact switches are closed, the centering of the workpiece 5 to be measured is finished, and at the moment, the centering motor 43 stops rotating; then the centering motor 43 rotates reversely to drive each centering push rod 33 to move reversely away from the workpiece 5 to be measured, the automatic centering process of the workpiece 5 to be measured is completed, and then the roundness of the workpiece 5 to be measured is measured.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. Roundness measuring equipment is from centring means, including operation platform, the last rotatory magnetic table of air supporting who is used for adsorbing the work piece of being surveyed of installing of operation platform, its characterized in that: at least three centering assemblies which radially push the workpiece to be measured to move are uniformly distributed on the operating platform along the circumferential direction of the air-floatation rotating magnetic table; and the operating platform is provided with a synchronous driving device which drives the centering assemblies to move inwards or outwards simultaneously.
2. The roundness measuring apparatus self-centering device of claim 1, wherein: the synchronous driving device comprises a driving bevel gear which is coaxial with the air-floatation rotary magnetic table, the driving bevel gear is rotatably arranged at the bottom of the operating platform, and a driven bevel gear which is in meshing transmission with the driving bevel gear is rotatably arranged on the centering assembly.
3. The roundness measuring apparatus self-centering device of claim 2, wherein: an automatic driving device is arranged between the operating platform and the driving bevel gear.
4. The roundness measuring apparatus self-centering device of claim 3, wherein: the automatic driving device comprises a centering motor fixedly installed on the operating platform, a driving gear is installed at the output end of the centering motor, and a driven gear ring in meshing transmission with the driving gear is arranged on the periphery of the driving bevel gear.
5. The roundness measuring apparatus self-centering device of claim 2, wherein: the centering assembly further comprises a centering holder which is slidably mounted on the operating platform, a centering screw is mounted on the centering holder through thread fit, a driven bevel gear is fixedly mounted at one end of the centering screw, and a centering push rod which radially pushes a workpiece to be measured to move is further mounted on the centering holder.
6. The roundness measuring apparatus self-centering device of claim 5, wherein: and a light touch switch is arranged at the end part of the centering push rod, which is in contact with the surface of the workpiece to be detected.
7. The roundness measuring apparatus self-centering device of claim 2, wherein: the driving bevel gear is rotatably arranged on the operating platform through a bearing.
8. The roundness measuring apparatus self-centering device of claim 1, wherein: the operating platform is provided with a centering sliding groove, and the centering assembly is provided with a centering sliding rail matched with the centering sliding groove.
9. High-speed roundness measuring equipment, including roundness measuring equipment pedestal, its characterized in that: the roundness measuring instrument self-centering device of any one of claims 1 to 8, which is mounted on the roundness measuring instrument base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021596069.2U CN211503999U (en) | 2020-08-05 | 2020-08-05 | Roundness measuring instrument self-centering device and high-speed roundness measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021596069.2U CN211503999U (en) | 2020-08-05 | 2020-08-05 | Roundness measuring instrument self-centering device and high-speed roundness measuring instrument |
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| CN211503999U true CN211503999U (en) | 2020-09-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061439A (en) * | 2021-11-17 | 2022-02-18 | 台州学院 | Size-adjustable centering tool |
| CN114378621A (en) * | 2021-12-24 | 2022-04-22 | 宁夏盾源聚芯半导体科技股份有限公司 | Device for quickly finding circle center |
-
2020
- 2020-08-05 CN CN202021596069.2U patent/CN211503999U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061439A (en) * | 2021-11-17 | 2022-02-18 | 台州学院 | Size-adjustable centering tool |
| CN114378621A (en) * | 2021-12-24 | 2022-04-22 | 宁夏盾源聚芯半导体科技股份有限公司 | Device for quickly finding circle center |
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