A measuring device for detecting the diameter of a workpiece being machined in real time in a two-axis numerical control machine tool

Abstract

The present application relates to a kind of measuring devices for detecting diameter of machined part of two-axis numerical control machine tool at any time, magnetic base is connected with ball screw guide rail by connecting plate, ball screw guide rail is installed with table seat, for installing general table frame, at the same time, magnetic base upper portion is installed with level, for determining whether guide rail is horizontal in use, ensure that the measured value is accurate, ball screw is connected with rocker hand wheel, by rotating rocker hand wheel, drive screw guide rail rotates while making table seat linearly move along guide rail line.The device of the present application can realize high-precision diameter size in two-axis numerical control lathe in-machine rapid measurement.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical manufacturing, and particularly relates to a measuring device for detecting the diameter of a machined part in real time in a two-axis numerical control machine tool. BACKGROUND

[0002] With the rapid development of the aviation field in China, the demand for difficult-to-machine and easily-deformed parts is also increasing. The typical feature of the machine gate type part is thin wall and easy deformation. Some ring structure parts need to be machined using a two-axis numerical control lathe. Due to the complex structure of the part, the thin wall and easy deformation, and high precision, the size precision of some parts is within 0.05 mm in diameter. During the turning process, the part needs to be measured on the lathe while being machined to ensure the machining precision of the part. Due to the limitation of the structure of the part, especially in the typical thin-walled rotary part of the aero-engine, the diameter size cannot be detected using a general inside and outside diameter micrometer, and a special measuring tool needs to be used to realize the in-machine measurement during part machining. However, the special measuring tool has a long manufacturing cycle and high cost. SUMMARY

[0003] To solve the above technical problems, the present application aims to provide a measuring device for detecting the diameter of a machined part in real time in a two-axis numerical control machine tool. The specific technical solution is as follows:

[0004] A measuring device for detecting the diameter of a machined part in real time in a two-axis numerical control machine tool, comprising a magnetic base, a connecting plate, a ball screw guide rail, a rocker hand wheel, a table seat, a level, a universal table stand and a lever dial gauge; the magnetic base is arranged on the upper end of the connecting plate through bolts; the connecting plate is arranged on the upper end of the ball screw guide rail through bolts; the magnetic base is connected to the ball screw guide rail through the connecting plate; the ball screw guide rail is provided with a rocker hand wheel on one side, and the table seat is arranged at the front end of the ball screw guide rail. The rocker hand wheel is rotated to drive the ball screw to rotate and drive the table seat to move linearly along the ball screw guide rail, so as to determine the highest cutting point of the measured diameter.

[0005] The level is connected to the upper end of the base through screws; the universal table stand is used for fixing the dial gauge or the dial gauge, and is used for measuring the highest point of the measured surface and determining the displacement distance of the X-axis of the machine tool, so as to calculate the actual value of the measured diameter. The universal table stand is connected to the table seat. The relative position of the dial needle and the measured part surface is adjusted.

[0006] Preferably, the magnetic base is a non-standard lengthened magnetic suction base, which is used for connecting the guide rail through the connecting plate, preventing the level and the whole device from being adsorbed on the lathe tool holder.

[0007] Preferably, the connecting plate is made of aluminum alloy.

[0008] Preferably, the rocker hand wheel is made of 45# steel.

[0009] Preferably, the table base is made of aluminum alloy.

[0010] Preferably, the level is arranged in parallel with the ball screw guide rail, which is used to determine whether the guide rail is horizontal during use of the device.

[0011] During use, the magnetic base is adsorbed to the side of the lathe tool holder, so that the guide rail of the device is perpendicular to the X and Z surfaces of the lathe. By moving the X and Z axes of the lathe, the dial head driven by the device can move linearly perpendicular to the X and Z surfaces, so that the dial hand can touch the highest point of the measured diameter surface along the X axis direction. In combination with the fixed size ring gauge coaxial with the lathe workbench and the relative displacement distance of the X axis displayed by the lathe, the actual distance of the measurement point and the tangent point of the ring gauge can be calculated, and thus the diameter of the measured surface can be calculated.

[0012] Advantages of the present application:

[0013] 1. The device of the present application has simple design structure, and the manufacturing requirements of each mechanism are not high. Some are general standard parts, which are low in cost and easy to realize.

[0014] 2. Since it is a relative measurement scheme, the measurement data has high reliability.

[0015] 3. Considering that the movement direction of the guide rail may not be horizontal after adsorption, which affects the measurement accuracy, a level for horizontal calibration of the guide rail is specially designed, which can effectively improve the measurement accuracy of the device.

[0016] 4. The present application solves the problem that the diameter size cannot be measured by using common measuring tools such as internal and external diameter micrometers. The technical scheme can be used as a universal measuring tool for detecting the diameter of a two-axis numerical control lathe. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the measuring device;

[0018] Figure 2 It is a schematic diagram of the magnetic base of the measuring device;

[0019] Figure 3 It is a schematic diagram of the connecting plate of the measuring device;

[0020] Figure 4 It is a schematic diagram of the ball screw guide rail of the measuring device;

[0021] Figure 5 It is a schematic diagram of the swing arm hand wheel of the measuring device;

[0022] Figure 6 It is a schematic diagram of the table base of the measuring device;

[0023] Figure 7 It is a schematic diagram of the level of the measuring device;

[0024] Figure 8 The general table frame schematic diagram of the measuring device;

[0025] Figure 9 The lever micrometer gauge schematic diagram of the measuring device;

[0026] Figure 10 The size position structure schematic diagram of the measured part.

[0027] In the figure, 1 is a magnetic base, 2 is a connecting plate, 3 is a ball screw guide rail, 4 is a rocker hand wheel, 5 is a table seat, 6 is a level, 7 is a general table frame, and 8 is a lever micrometer gauge. DETAILED DESCRIPTION

[0028] The drawings are attached Figures 1-9 The device is described in detail.

[0029] A measuring device for detecting the diameter of a machined part at any time in a two-axis numerical control machine tool, comprising a magnetic base 1, a connecting plate 2, a ball screw guide rail 3, a rocker hand wheel 4, a table seat 5, a level 6, a general table frame 7 and a lever micrometer gauge 8; the magnetic base 1 is arranged on the upper end of the connecting plate 2 through bolts; the connecting plate 2 is arranged on the upper end of the ball screw guide rail 3 through bolts; the magnetic base 1 is connected to the ball screw guide rail 3 through the connecting plate 2; the rocker hand wheel 4 is arranged on one side of the ball screw guide rail 3, and the table seat 5 is arranged at the front end of the ball screw guide rail 3; the table seat is driven to move linearly along the ball screw guide rail 3 by rotating the rocker hand wheel to drive the ball screw to rotate; the level 6 is connected to the upper end of the base through screws; the lever micrometer gauge 8 is fixed on the general table frame 7, and the general table frame 7 is connected to the table seat 5.

[0030] The magnetic base 1 is a non-standard lengthened magnetic suction base.

[0031] The connecting plate 2 is made of aluminum alloy.

[0032] The rocker hand wheel 4 is made of 45# steel.

[0033] The table seat 5 is made of aluminum alloy.

[0034] The level 6 is arranged in parallel with the ball screw guide rail 3.

[0035] As Figure 10 As shown in the figure, the part cannot be measured in diameter size Φ815.045±0.025mm by using the internal and external diameter micrometer gauge.

[0036] In use, the device is adsorbed to one side of the lathe tool holder through the magnetic base 1, the device ball screw guide is adjusted to be horizontal through the level, the ball screw guide is perpendicular to the XZ plane of the machine tool, a fixed size ring gauge is placed in the center of the machine tool workbench, the device is aligned with the machine tool workbench through the dial, the dial needle is pressed on the measured diameter surface through moving the X and Z axes of the machine tool, the device is manually rotated through the rocker arm hand wheel 4, the lever dial gauge 8 is driven to move along the vertical XZ plane, the cutting point of the measured surface along the guide rail is found, the lever dial gauge 8 reading and the X axis coordinate of the machine tool are recorded, the dial needle of the lever dial gauge 8 is pressed on the fixed size ring gauge to detect the diameter surface through moving the X and Z axes of the machine tool, the lever dial gauge 8 reading is adjusted to be the same as the measured surface reading, the X axis coordinate of the machine tool at this time is recorded, the difference between the two times when the X axis readings are the same is calculated, and then the difference is added to the radius of the ring gauge, so the radius of the measured circle can be obtained, and the diameter of the measured surface can be indirectly calculated. This method is a relative measurement, the precision is only related to the single positioning precision of the machine tool, and the diameter detection with an error of 0.05mm can be effectively satisfied.

Claims

1. A measuring device for continuously detecting the diameter of a workpiece being machined on a two-axis CNC machine tool, characterized in that: Includes a magnetic base (1), a connecting plate (2), a ball screw guide rail (3), a rocker arm handwheel (4), a dial indicator base (5), a level (6), a universal dial indicator stand (7), and a lever micrometer (8); The magnetic base (1) is bolted to the upper end of the connecting plate (2); The connecting plate (2) is bolted to the upper end of the ball screw guide rail (3); The magnetic base (1) is connected to the ball screw guide rail (3) via the connecting plate (2); The ball screw guide rail (3) has a rocker arm handwheel (4) on one side via a side top screw, and the dial indicator (5) is located at the front end of the ball screw guide rail (3). By rotating the rocker arm handwheel, the ball screw is rotated, which in turn causes the dial indicator to move linearly along the ball screw guide rail (3). The level (6) is connected to the upper end of the base by screws; The universal meter holder (7) is used to fix a dial indicator or micrometer, and the universal meter holder (7) is connected to the meter base (5); During use, the ball screw guide rail (3) is attached to one side of the lathe tool holder via the magnetic base (1). Using a level, the ball screw guide rail (3) is adjusted to be horizontal and perpendicular to the XZ plane of the machine tool. A fixed-size ring gauge is placed at the center of the machine tool table. The dial indicator is aligned with the machine tool table. By moving the X and Z axes of the machine tool, the dial indicator needle is pressed against the diameter surface of the part being measured. Simultaneously, in conjunction with the measuring device, the rocker arm handwheel (4) is manually rotated to drive the lever dial indicator (8) to move along the perpendicular XZ plane, finding the tangent point of the measured surface along the guide rail direction, and recording the result. Using the reading of the lever micrometer (8) and the X-axis coordinate of the machine tool, move the X and Z axes of the machine tool and press the pointer of the lever micrometer (8) onto the specified diameter surface of the fixed-size ring. Adjust the lever micrometer (8) reading to be the same as the reading of the measuring surface. Record the X-axis coordinate of the machine tool at this time. Calculate the difference when the readings of the X-axis pressure gauges are the same twice. Add the difference to the radius of the ring gauge to obtain the radius of the measured circle. The diameter of the measured surface can be indirectly calculated. This method is a relative measurement, and the accuracy is only related to the unidirectional positioning accuracy of the machine tool. It effectively meets the diameter detection requirement of 0.05mm.

2. The measuring device for continuously detecting the diameter of a workpiece on a two-axis CNC machine tool according to claim 1, characterized in that, The magnetic base (1) is a non-standard extended magnetic suction base.

3. The measuring device for continuously detecting the diameter of a workpiece on a two-axis CNC machine tool according to claim 1, characterized in that, The connecting plate (2) is made of aluminum alloy.

4. A measuring device for continuously detecting the diameter of a workpiece on a two-axis CNC machine tool according to claim 1, characterized in that, The rocker arm handwheel (4) is made of 45# steel.

5. A measuring device for continuously detecting the diameter of a workpiece on a two-axis CNC machine tool according to claim 1, characterized in that, The base (5) is made of aluminum alloy.

6. A measuring device for continuously detecting the diameter of a workpiece on a two-axis CNC machine tool according to claim 1, characterized in that, The level (6) is set parallel to the ball screw guide rail (3).

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