CN107677226A - Axial workpiece Endoporus measuring device - Google Patents

Abstract

The invention discloses a device for measuring inner holes of shaft parts, which belongs to the technical field of precision testing and measurement. It includes a workbench, on which there are measuring base, guide rail base plate, guide rail, slide plate, probe base plate, probe top plate, etc. The measuring base is equipped with anti-snag block and travel switch, and the probe base plate and probe top plate pass through Reed connection, the pneumatic probe is installed in the probe fixing block, and the probe fixing block is connected to the measuring top plate through the reed. The inventive device adopts the measurement method of the pneumatic measuring instrument, and by connecting the servo motor with the coupling and the ball screw, and driving the pneumatic measuring head into the inner hole of the workpiece, the inner hole of the shaft parts can be measured with high precision, speed and safety. Measurement effectively improves product measurement efficiency and processing quality, and meets industrial mass measurement requirements.

Description

Measuring device for inner hole of shaft parts

technical field

The invention relates to an inner hole measuring device, in particular to an inner hole measuring device for shaft parts, which belongs to the technical field of precision testing and measurement.

Background technique

With the rapid development of modern science and technology, automobiles, aerospace, ships and military and other fields, higher and higher requirements are put forward for the processing and measurement of hole parts. In the process of measuring hole parts, especially for the measurement of small hole diameter, the range of movement of the measuring tool is limited, the operation is inconvenient, the measurement speed is slow, and the roughness of the inner surface is required to be high. The sensor will also cause errors due to the existence of the measurement force, so it is difficult to achieve high-precision measurement of the small hole diameter.

In the prior art, there are many methods for measuring the inner hole, such as using a vernier caliper, an inner micrometer or a no-go gauge. Although these mechanical measuring instruments have the advantages of simple structure, low cost, stable performance, and portability, the readings are troublesome and the measurement accuracy is not high, which is greatly affected by subjective factors such as the operator's technical proficiency level and work attitude, which has seriously affected to the measurement accuracy. Especially in the harsh industrial environment or high-speed assembly line mass measurement, the above-mentioned measurement method cannot be realized.

Therefore, it is very necessary to provide a measuring device for the inner hole of shaft parts to solve the above problems.

Contents of the invention

The present invention aims to provide a measuring device for the inner hole of shaft parts, so as to solve the problems of low measurement accuracy, high difficulty, troublesome operation and difficulty in large-scale measurement of small holes of shaft parts in the prior art.

To achieve the above object, the technical scheme of the present invention is as follows:

A device for measuring inner holes of shaft parts, including a workbench 1, which is used to place measurement components; a measurement base 6 is installed on the workbench 1, and the measurement base 6 is a centrally symmetrical structure, and a guide rail bottom plate is installed on the measurement base 6 3. There are ball linear guides 4 on both sides of the guide rail bottom plate 3, and the ball linear guides 4 are used to support and guide the slide plate 2, so that the slide plate 2 can reciprocate linearly in a predetermined direction;

The bottom plate 13 of the probe of the device is installed on the slide plate 2; one end of the reed 11 is connected to the top plate 12 of the probe, and the other end is fixed on the bottom plate 13 of the probe, and has good elasticity. The reed 11 is used to adjust the pneumatic probe 15 The range of up and down and left and right activities; the pneumatic probe 15 is installed in the probe fixing block 14 through a transition fit, and the pneumatic probe 15 is used to extend into the inner hole of the workpiece to be measured for measurement.

An anti-channeling block 19 is installed on the measuring base 6, and the anti-channeling block 19 is used to ensure the safety of the measurement of the workpiece to be measured, preventing the pneumatic probe 15 from taking the workpiece to be measured out of the clamping sleeve 18; There is also a travel switch 5 at the end, which is used to limit the moving range of the pneumatic measuring head 15.

One end of the measurement base 6 is provided with a servo motor 7, the servo motor 7 is fixed on the measurement base 6 through the motor base 9, the servo motor 7 is the power source of the entire measurement device, and the servo motor 7 is used to drive the pneumatic probe 15 on the slide plate 2 Carry out linear motion; the high-precision digital pneumatic measuring instrument 16 is installed on the workbench 1, and is used for modifying parameters and displaying measurement data.

The inner hole measuring device also includes a feeding mechanism. The feeding mechanism is composed of a turntable 17, a clamping sleeve 18 and a control system. The turntable 17 is installed on the clamping sleeve 18, and the clamping sleeve 18 and the turntable 17 are controlled by the control system; The sleeve 18 is installed on the anti-running block 19, and the feeding mechanism is used to realize automatic feeding of the workpiece to be measured, and provide basic conditions for continuous mass measurement.

Before the measurement, the digital pneumatic measuring instrument 16 should be calibrated first, and the standard ring gauge should be inserted into the pneumatic measuring head 15 according to the corresponding operation; Under the control of 7, enter the inner hole of the workpiece to be measured to start measurement, return immediately after collecting the data, the operator records the data on the display screen of the pneumatic measuring instrument 16, and the next workpiece to be measured enters the station to be tested again, and repeats the operation. In this way, the rapid measurement of shaft parts can be realized, and the errors caused by human factors can be reduced.

The present invention can obtain following beneficial effect:

1) In the inner hole measuring device of the present invention, by adopting the measuring method of a digital pneumatic measuring instrument, high-precision measurement of the small hole diameter of shaft parts can be realized.

2) In the inner hole measuring device of the present invention, the anti-running block can effectively ensure the safety of workpiece measurement and prevent the pneumatic probe from taking the workpiece out of the clamping sleeve.

3) In the inner hole measuring device of the present invention, the pneumatic measuring head is connected by a reed, which can automatically adjust the coaxiality between the pneumatic measuring head and the inner hole of the workpiece, and reduce the degree of damage to the measuring head.

4) The inventive device can effectively improve the measurement efficiency, reduce the labor intensity of operators, and complete the task of mass measurement.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the drawings that need to be used in the description of the embodiments. In the attached picture:

Figure 1 is a general diagram of the mechanical structure of the inner hole measuring device of shaft parts

Figure 2 is the working flow chart of the inner hole measuring device of shaft parts

1. Worktable, 2. Skateboard, 3. Guide rail bottom plate, 4. Guide rail, 5. Limit switch, 6. Measuring base, 7. Servo motor, 8. Coupling, 9. Motor seat, 10. Ball screw, 11. Reed, 12. Probe top plate, 13. Probe bottom plate, 14. Probe fixing block, 15. Pneumatic probe, 16. High-precision digital pneumatic measuring instrument, 17. Turntable, 18. Clamping sleeve, 19. Anti-channeling block

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, the device for measuring the inner hole of shaft parts in this embodiment includes a workbench 1 for placing measurement components. A measurement base 6 is installed on the workbench 1. The measurement base 6 has a centrally symmetrical structure. Through a set of screws It is fixed on the workbench 1; the guide rail bottom plate 3 is installed on the measurement base 6, and ball linear guide rails 4 are arranged on both sides, which are used to support and guide the slide plate 2, and make reciprocating linear motion in a given direction; the inner hole measuring device is also It includes the probe bottom plate 13, the probe top plate 12 and the reed 11, wherein the probe bottom plate 13 is fixed on the slide plate 2 by a set of screws, one end of the reed 11 is connected with the probe top plate 12, and the other end is fixed on the probe bottom plate 13 ; The right end of the measuring head fixing block 14 is also connected to the measuring head top plate 12 through the reed 11. Because the reed 11 has good elasticity, it can adjust the space for the pneumatic measuring head 15 to move up and down and left and right; The fixed block 14 is used to extend into the inner hole of the workpiece for precise measurement. When the measuring head is inserted into the inner hole, the damage degree of the pneumatic measuring head 15 can be reduced.

Figure 1 shows that the inner hole measuring device in the embodiment also includes an anti-channeling stopper 19, which is fixed on the measurement base 6. The anti-channeling stopper 19 is mainly composed of two semicircular baffles slightly smaller than the outer diameter of the workpiece. The distance between them is greater than the length of the workpiece, and the semicircular hole on the anti-channeling block 19 needs to be kept coaxial with the pneumatic probe 15; The workpiece is taken out of the clamping sleeve 18, which improves the safety and accuracy of measurement.

Figure 1 shows that in the embodiment, two travel switches 5 are installed at the front and rear ends of the measuring base 6. The distance between the two travel switches 5 is determined according to the depth of the pneumatic measuring head 15 extending into the inner hole of the workpiece, which is used to limit the pneumatic measuring head. The range of movement of the head 15; the right end of the measurement base 6 is provided with a servo motor 7, and the servo motor 7 is fixed on the measurement base 6 through the motor base 9, which is used as a power element of the whole measuring device; the servo motor 7 is connected with a shaft coupling 8, The coupling 8 is connected with the ball screw 10, and drives the ball screw 10 to rotate together, and the screw nut converts the rotational motion into a linear motion, and drives the pneumatic measuring head 15 to perform reciprocating motion.

Preferably, in this embodiment, a high-precision digital pneumatic measuring instrument 16 is used, installed on the workbench 1, for modifying measurement parameters and displaying data, and has the advantages of high measurement accuracy, self-cleaning function, simple structure, and convenient operation and maintenance. , especially suitable for measuring the diameter of small holes; through the movement of the pneumatic measuring head 15 into the inner hole of the workpiece to collect data, the operator can directly read the data on the display screen of the pneumatic measuring instrument 16, which effectively improves the measurement efficiency of the inner hole , to reduce the labor intensity of the staff.

The inner hole measuring device of this embodiment also includes a feeding mechanism (partially drawn), which is composed of a turntable 17, a clamping sleeve 18 and a control system; Between the partitions, it has a high coaxiality with the pneumatic probe 15, and ensures that the pneumatic probe 15 enters the inner hole of the workpiece without friction or pushing the workpiece to move. This position is called the station to be tested, and the symbol No. The loading of a workpiece is completed; when the pneumatic probe 15 extends into the inner hole of the workpiece to collect data and returns to the origin, the turntable 17 continues to rotate under the action of the control system, and the workpiece in the clamping sleeve 18 enters the station to be tested again. The second workpiece is loaded, and this is repeated continuously, so as to realize the automatic loading of the workpiece and provide basic conditions for continuous large-scale measurement.

As shown in Figure 2, it is the working process of the measuring device for the inner hole of shaft parts in this embodiment. Before the measurement, the digital pneumatic measuring instrument 16 should be calibrated, and the standard ring gauge should be inserted into the pneumatic measuring head 15 according to the corresponding The operation is carried out; the feeding mechanism sends the workpiece to the station to be tested, and the pneumatic measuring head 15 enters the inner hole under the control of the servo motor 7 to start measurement, and returns immediately after collecting the data, and the operator records the pneumatic measuring instrument 16 on the display screen. The data, the next workpiece to be tested enters the station to be tested, and the above operations are repeated, so as to realize the rapid measurement of shaft parts and greatly reduce the error caused by human factors.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. The device for measuring the inner hole of shaft parts is characterized in that: it includes a workbench (1), and the workbench (1) is used to place the measuring parts; the workbench (1) is equipped with a measuring base (6), and the measuring base (6 ) is a centrally symmetrical structure, and a guide rail bottom plate (3) is installed on the measurement base (6), and ball linear guide rails (4) are arranged on both sides of the guide rail bottom plate (3), and the ball linear guide rails (4) are used to support and guide the slide plate (2) , so that the slide plate (2) performs reciprocating linear motion in a predetermined direction; The probe bottom plate (13) of the device is installed on the slide plate (2); one end of the reed (11) is connected with the probe top plate (12), and the other end is fixed on the probe bottom plate (13), and has good elasticity, The reed (11) is used to adjust the up and down and left and right movement range of the pneumatic probe (15); the pneumatic probe (15) is installed in the probe fixing block (14) through transition fit, and the pneumatic probe (15) is used into the inner hole of the workpiece to be measured for measurement; An anti-channeling block (19) is installed on the measuring base (6), and the anti-channeling block (19) is used to ensure the safety of the measurement of the workpiece to be measured and prevent the pneumatic probe (15) from taking the workpiece to be measured out of the clamping sleeve (18); At the same time, travel switches (5) are also arranged at both ends of the measuring base (6), for limiting the range of movement of the pneumatic probe (15); One end of the measuring base (6) is provided with a servo motor (7), the servo motor (7) is fixed on the measuring base (6) through a motor base (9), the servo motor (7) is the power source of the whole measuring device, the servo motor (7) is used to drive the pneumatic measuring head (15) on the slide plate (2) to perform linear motion; the high-precision digital pneumatic measuring instrument (16) is installed on the workbench (1) for modifying parameters and displaying measurement data. 2. The inner hole measuring device of shaft parts according to claim 1, characterized in that: the inner hole measuring device also includes a feeding mechanism, which is composed of a turntable (17), a clamping sleeve (18) and a control system , the turntable (17) is installed on the clamping sleeve (18), and the clamping sleeve (18) and the turntable (17) are controlled by the control system; the clamping sleeve (18) is installed on the anti-channel block (19), and the feeding The mechanism is used to realize the automatic loading of workpieces to be measured, and provide basic conditions for continuous mass measurement. 3. The device for measuring the inner hole of shaft parts according to claim 1, characterized in that: before the measurement, the digital pneumatic measuring instrument (16) should be calibrated, and a standard ring gauge should be inserted into the pneumatic measuring head (15) According to the corresponding operation; the feeding mechanism sends the workpiece to the station to be tested, and the pneumatic probe (15) enters the inner hole of the workpiece to be tested under the control of the servo motor (7) to start measurement, and returns immediately after the data is collected. , the operator records the data on the display screen of the pneumatic measuring instrument (16), and the next workpiece to be tested enters the station to be tested, and the operation is repeated, so as to realize rapid measurement of shaft parts and reduce errors caused by human factors.