CN210892969U

CN210892969U - Roundness measuring device based on three-point method

Info

Publication number: CN210892969U
Application number: CN201921533441.2U
Authority: CN
Inventors: 李岩
Original assignee: Shibida Zhaoqing Precision Manufacturing Co ltd
Current assignee: Shibida Zhaoqing Precision Manufacturing Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-06-30
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a roundness measuring device based on a three-point method, which comprises a base, an inclined plate, a micrometer, a first guide rail, a second guide rail, a guide rail connecting piece, a first motor, a screw rod assembly, a fixing piece, a second motor and a three-jaw chuck; an inclined plate, a first guide rail which is vertically arranged and a second guide rail which is horizontally arranged are arranged above the base, and the micrometer is fixedly connected with the second guide rail; the base is further provided with a first motor, the first motor is in threaded connection with the screw rod assembly, the screw rod assembly is fixedly connected with the fixing piece, a second motor is arranged in the fixing piece, and a rotating shaft of the second motor is fixedly connected with the three-jaw chuck. Through first guide rail, second guide rail and guide rail connecting piece, make micrometer can adjust its position in a flexible way, measure the circularity of not unidimensional axle class product. The shaft products are clamped by the three-jaw chuck and rotate at a constant speed along with the second motor, so that the precision reduction possibly caused by manual rotation of the shaft products is avoided, and the roundness measurement precision of the shaft products is ensured.

Description

Roundness measuring device based on three-point method

Technical Field

The utility model relates to a roundness measurement technical field, concretely relates to roundness measurement device based on three-point method.

Background

In actual production, after a batch of shaft products are produced in a manufacturing shop, workers need to measure the roundness of the shaft products so as to check whether the products meet production requirements. Common roundness measurement methods are: the roundness measuring instrument manufactured by the method has high environmental requirements, is generally used in a laboratory, and is not suitable for measuring shaft products in a manufacturing workshop. The two-point method is to measure two ends of a shaft product by a micrometer or a comparator, but the method needs to measure the same circular section of the shaft product for multiple times, and has low measurement precision and complicated use. The three-point method is a measurement method that is relatively suitable for measuring roundness in a manufacturing shop. The roundness measuring device manufactured based on the three-point method is characterized in that a measured workpiece is placed in a V-shaped block, the measured workpiece rotates for a circle in the V-shaped block during measurement, a maximum indicating value and a minimum indicating value are read out from a micrometer, and half of the difference between the two indicating values is the roundness error of the excircle of the measured workpiece. In the measurement process, the precondition for ensuring the measurement precision is to keep the micrometer stable and the workpiece to be measured stably rotating in the V-shaped block. However, in the traditional three-point method, the measured workpiece is manually rotated, so that a user cannot keep a faster uniform rotating speed in the measuring process, and certain influence is exerted on the measuring speed and the measuring precision. In addition, the micrometer needs a stable structural support to ensure the measurement accuracy of the device.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to provide a roundness measuring apparatus based on a three-point method with a fast measuring speed and a high accuracy, so as to solve the above-mentioned technical problem.

In order to overcome the technical problem, the utility model provides a technical scheme. A roundness measuring device based on a three-point method comprises a base, an inclined plate and a micrometer, wherein the micrometer comprises a dial plate, a measuring rod and a measuring head, a pointer is arranged in the dial plate, and the roundness measuring device further comprises a first guide rail, a second guide rail, a guide rail connecting piece, a first motor, a screw rod assembly, a fixing piece, a second motor and a three-jaw chuck; the two inclined plates and the vertically arranged first guide rail are arranged above the base, the first guide rail is connected with the guide rail connecting piece in a sliding manner, and the guide rail connecting piece is connected with the horizontally arranged second guide rail in a sliding manner; one end of the second guide rail, which is close to the inclined plate, is provided with a micrometer, and the micrometer is fixedly connected with the second guide rail;

the base still is equipped with first motor, first motor with lead screw subassembly threaded connection, the lead screw subassembly with mounting fixed connection, be equipped with in the mounting the second motor, the second motor with mounting fixed connection, the pivot of second motor with three-jaw chuck fixed connection.

Furthermore, the inclined plate is hinged with a rotating shaft, and the rotating shaft is fixedly connected with the base; an electric push rod is arranged below the inclined plate, and a push rod head of the electric push rod is in contact with the inclined plate to support the inclined plate. The electric push rod can be stretched to adjust the inclination angle of the inclined plate at will, so that the inclined plate can adapt to shaft products with different sizes.

Furthermore, the push rod head of the electric push rod is provided with a rubber cushion block, and the rubber cushion block is fixedly connected with the push rod head of the electric push rod. The rubber cushion block can slow down the pressure of the inclined plate and the shaft products on the electric push rod, is favorable for prolonging the service life of the electric push rod, and can ensure that the inclined plate is more stable in rotation.

Furthermore, a first limiting block and a second limiting block are respectively arranged at one end of the first guide rail, which is far away from the base, and one end of the second guide rail, which is far away from the inclined plate; the first limiting block and the second limiting block are fixedly connected with the first guide rail and the second guide rail respectively. The first limiting block and the second limiting block can limit the guide rail connecting piece to move on the first guide rail and the second guide rail without falling.

Furthermore, be equipped with the dead knob of lock on the guide rail connecting piece, the dead knob of lock is including locking bolt and knob lid. The locking knob is used for fixing the guide rail connecting piece on the second guide rail through the locking bolt when the micrometer is adjusted to be in the rear position, so that the measuring precision of the roundness measuring device is guaranteed.

Further, a rubber gasket is arranged below the base. The rubber gasket can reduce the vibration effect of the workbench on the roundness measuring device, and has an anti-skidding function, so that the roundness measuring device is not easy to displace on the workbench.

The utility model discloses the beneficial effect who produces is: the utility model discloses a first guide rail, second guide rail and guide rail connecting piece make micrometer adjust its position in a flexible way under the circumstances that remains stable, can measure the circularity of not unidimensional axle class product. The combination of the first motor, the screw rod assembly, the fixing part, the second motor and the three-jaw chuck enables the shaft products to rotate at a constant speed along with the second motor under the clamping of the three-jaw chuck, so that the accuracy reduction possibly caused by manual rotation of the shaft products is avoided, and the roundness measurement accuracy of the shaft products is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic side view of a roundness measuring apparatus;

FIG. 2 is a front view of the roundness measuring apparatus;

FIG. 3 is a schematic view of a three-dimensional structure of a micrometer lifting device;

wherein, 1, a base; 11. a rubber gasket; 2. shaft products; 3. a sloping plate; 31. a rotating shaft; 4. an electric push rod; 41. a rubber cushion block; 5. a micrometer; 51. a dial plate; 511. a pointer; 52. a measuring rod; 53. A measuring head; 61. a first guide rail; 62. a second guide rail; 63. a first stopper; 64. a second limiting block; 65. a guide rail connector; 71. a first motor; 72. a screw assembly; 73. a fixing member; 74. a second motor; 75. a three-jaw chuck.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Example (b): a roundness measuring device based on a three-point method comprises a base 1, an inclined plate 3, a micrometer 5, a first guide rail 61, a second guide rail 62, a guide rail connecting piece 65, a first motor 71, a screw rod assembly 72, a fixing piece 73, a second motor 74 and a three-jaw chuck 75; the two inclined plates 3 and the vertically arranged first guide rail 61 are arranged above the base 1, and the first guide rail 61 is in sliding connection with the horizontally arranged second guide rail 62 through a guide rail connecting piece 65; a micrometer 5 is arranged at one end of the second guide rail 62 close to the inclined plate 3, and the micrometer 5 is fixedly connected with the second guide rail 62;

the base 1 is further provided with a first motor 71, the first motor 71 is in threaded connection with the screw rod assembly 72, the screw rod assembly 72 is fixedly connected with the fixing piece 73, the second motor 74 is arranged in the fixing piece 73, the second motor 74 is fixedly connected with the fixing piece 73, and a rotating shaft of the second motor 74 is fixedly connected with the three-jaw chuck 75.

Further, the inclined plate 3 is hinged with a rotating shaft 31, and the rotating shaft 31 is fixedly connected with the base 1; an electric push rod 4 is arranged below the inclined plate 1, and a push rod head of the electric push rod 4 is in contact with the inclined plate 3 to support the inclined plate 3. The electric push rod 4 can be extended and retracted to adjust the inclination angle of the inclined plate 3 at will, so that the inclined plate 3 can adapt to shaft products 2 of different sizes.

Further, the push rod head of the electric push rod 4 is provided with a rubber cushion block 41, and the rubber cushion block 41 is fixedly connected with the push rod head of the electric push rod 4. The rubber cushion block 41 can slow down the pressure of the inclined plate 3 and the shaft products 2 on the electric push rod 4, is beneficial to prolonging the service life of the electric push rod 4, and can enable the inclined plate 3 to be more stable in rotation.

Further, a first limiting block 63 and a second limiting block 64 are respectively arranged at one end of the first guide rail 61 far away from the base 1 and one end of the second guide rail 62 far away from the inclined plate 3; the first limiting block 63 and the second limiting block 64 are fixedly connected with the first guide rail 61 and the second guide rail 62 respectively. The first stopper 63 and the second stopper 64 can restrict the rail connector 65 from moving on the first rail 61 and the second rail 62 without falling off.

Further, a dead lock knob 651 is arranged on the guide rail connecting piece 65, and the dead lock knob 651 comprises a dead lock bolt and a knob cover. The locking knob 651 is used for fixing the guide rail connecting piece on the second guide rail through a locking bolt when the micrometer is adjusted to the rear position, so that the measuring precision of the roundness measuring device is ensured.

Further, a rubber gasket 11 is arranged below the base 1. The rubber gasket 11 can reduce the vibration effect of the workbench on the roundness measuring device, and has an anti-slip function, so that the roundness measuring device is not easy to displace on the workbench.

The working principle is as follows: when the roundness of the shaft product 2 is measured, the telescopic degree of the electric push rod 4 is adjusted to make the included angle between the two inclined plates 3 be a preset angle. The shaft product 2 is placed between the two inclined plates 3, the first motor 71 is started to enable the three-jaw chuck 75 to be adjusted by the screw rod assembly 72, and the jaw of the three-jaw chuck 75 and the shaft product 2 are on the same horizontal line. The shaft products 2 are pushed into the jaw openings of the three-jaw chuck 75, so that the shaft products 2 are tightly clamped by the jaw openings. The micrometer is then adjusted vertically by means of the first guide rail 61 to a height higher than the height of the three-jaw chuck 75 and then adjusted horizontally by means of the second guide rail 62 to be positioned on the shaft product 2. The vertical height of the micrometer is then lowered and the movement is stopped when the measuring head 53 on the measuring rod 52 has just contacted the shaft product 2. And then, starting the second motor 74 to make the shaft product 2 clamped by the three-jaw chuck 75 rotate for a circle at a constant speed, observing the swing amplitude of the pointer 511 in the dial 51, and reading out the maximum indication value and the minimum indication value, so that the roundness of the shaft product 2 is known.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "above," "inside," "side," and the like are used herein for illustrative purposes only.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A roundness measuring device based on a three-point method comprises a base, an inclined plate and a micrometer, wherein the micrometer comprises a dial plate, a measuring rod and a measuring head, and a pointer is arranged in the dial plate; the two inclined plates and the vertically arranged first guide rail are arranged above the base, the first guide rail is connected with the guide rail connecting piece in a sliding manner, and the guide rail connecting piece is connected with the horizontally arranged second guide rail in a sliding manner; one end of the second guide rail, which is close to the inclined plate, is provided with a micrometer, and the micrometer is fixedly connected with the second guide rail;

2. The roundness measuring apparatus according to claim 1, wherein the swash plate is hinged to a rotary shaft, and the rotary shaft is fixedly connected to the base; an electric push rod is arranged below the inclined plate, and a push rod head of the electric push rod is in contact with the inclined plate to support the inclined plate.

3. The roundness measuring apparatus according to claim 2, wherein the pusher head of the electric putter is provided with a rubber pad, and the rubber pad is fixedly connected with the pusher head of the electric putter.

4. The roundness measuring device according to claim 1, wherein a first stopper and a second stopper are provided at an end of the first guide rail away from the base and an end of the second guide rail away from the swash plate, respectively; the first limiting block and the second limiting block are fixedly connected with the first guide rail and the second guide rail respectively.

5. The roundness measuring apparatus according to claim 1, wherein the rail connecting member is provided with a deadlocking knob, and the deadlocking knob is provided with a deadlocking bolt.

6. The roundness measuring apparatus according to claim 1, wherein a rubber gasket is provided below the base.