Automatic measuring instrument for front and back angles and cutting edge inclination of turning tools

Abstract

An automatic measuring instrument for the front and back angles and the inclination angles of a turning tool, including a measuring instrument base and a display part. The invention breaks the shortcomings of existing experimental instruments, applies advanced testing and sensing technology to the development and research of the experimental platform, realizes the automatic measurement of the front and back angles and the inclination angles of the turning tool, and uses a display screen to directly read the measurement data, thereby improving the measurement accuracy. The analog quantity output by the wire drawing sensor is converted into an analog quantity through an analog-to-digital conversion module in a control box, and the converted digital quantity is input into a single-chip microcomputer, and then the single-chip microcomputer inputs the measured result into a display screen for display. The process of the measurer estimating the reading is omitted.

Description

Technical Field

[0001] The invention relates to the technical field of measuring instruments, in particular to an automatic measuring instrument for the front and back angles and the inclination angle of a turning tool. Background Art

[0002] The course "Basics of Mechanical Manufacturing Technology" is a required course for engineering students. The course covers highly professional and theoretical content, laying a theoretical foundation for engineering students to work or continue their studies in the future. The tool angle part involved is currently a popular technology in the factory. The quality of workpieces processed by tools at different angles is different and varies greatly. Therefore, the tool angle seriously affects the processing quality, so the factory pays more attention to this technology. At the same time, in the professional course, the experimental class for this part of the content not only provides students with hands-on operation skills, but also deepens students' understanding of textbook knowledge, and realizes zero-distance contact between students and engineering practice.

[0003] The turning tool is the most typical tool among machining tools. It has a strong spatial three-dimensionality and is not easy for students to understand at first. The "Turning Tool Geometric Angle Measurement" experiment course for this part provides students with space to understand this part of theoretical knowledge and opportunities for hands-on operation. In view of the current experimental bench, due to years of use, there are defects such as corrosion, scratches, and unclear engraving lines. At the same time, the operation of the old experimental bench is still completed manually by the measurer, and automatic measurement is not achieved. At the same time, the experimental bench can only meet the previous teaching purposes and cannot be promoted and applied in enterprises. In view of this, an original development and research of the automatic measurement device for the front angle, back angle and blade inclination angle of the turning tool has been developed, so that it can be used in undergraduate teaching and factories. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic measuring instrument for the front and back angles and the cutting edge inclination angle of a turning tool in view of the problems and shortcomings described in the background technology.

[0005] The automatic measuring instrument for the front and back angles and the inclination angle of a turning tool comprises a measuring instrument base; stepped holes for installing the bottom support are provided at the four corners of the measuring instrument base, the fixed housing is installed on the measuring instrument base, a turning tool clamping seat for placing the turning tool is installed on the measuring instrument base, the turning tool clamping seat is a rectangular parallelepiped member, and the position of the turning tool after being placed is not adjustable, a first L-shaped plate is also installed on the measuring instrument base, a first cylinder is fixed to the upper protruding part of the first L-shaped plate, a pressing plate for fixing and pressing the turning tool is installed on the push plate of the first cylinder, a second L-shaped plate is also installed on the measuring instrument base, a second cylinder and a third cylinder are installed on the second L-shaped plate, a right-angle plate is fixedly connected to the working end of the second cylinder, the main cutting edge of the turning tool contacts the side of the forward protruding part of the right-angle plate, and the tip of the turning tool contacts the right angle line of the right-angle plate;

[0006] The working end of the third cylinder is connected to the measuring assembly of the rake angle and the cutting edge inclination angle, and the measuring assembly of the rake angle and the cutting edge inclination angle is slidably connected to the second L-shaped plate. The measuring assembly of the rake angle and the cutting edge inclination angle is driven by the third cylinder to move up and down along the guide rail. The measuring assembly of the rake angle and the cutting edge inclination angle is driven by the third cylinder to move up and down along the guide rail, so that two moving contacts and one static contact at the front end of the wire sensor are in contact with the front cutting edge surface, thereby completing the measurement of the rake angle and the cutting edge inclination angle.

[0007] A short L-shaped plate is also installed on the base of the measuring instrument, and a fourth cylinder is fixedly connected to the short L-shaped plate. The working end of the fourth cylinder is connected to a back angle measuring assembly, and the back angle measuring assembly is slidably connected to the short L-shaped plate. The fourth cylinder drives the back angle measuring assembly to slide back and forth along the short L-shaped plate, so that the front end moving contact and the static contact of the wire sensor are in contact with the main back tool surface, and the back angle measurement is completed.

[0008] The display part includes a display screen, a single-chip microcomputer and an analog-to-digital conversion module, the wire pull sensor is connected to the analog-to-digital conversion module, the digital-to-analog switch and the solenoid valve on the first cylinder, the solenoid valve on the second cylinder, the solenoid valve on the third cylinder and the solenoid valve on the fourth cylinder are all connected to the single-chip microcomputer, and the single-chip microcomputer is connected to the display screen in communication;

[0009] The display screen is installed on a fixed housing, and the display screen can also be connected to a computer via a data cable, and then the measurement data can be displayed through the computer. At the same time, the measurement results can also be stored in the computer and the measured data can be compared.

[0010] Beneficial effects of the present invention:

[0011] 1. This invention breaks through the shortcomings of existing experimental instruments, applies advanced testing and sensing technology to the development and manufacture of the experimental bench, and realizes the automatic measurement of the front angle, back angle and cutting edge inclination angle of the turning tool. The measurement result is more accurate than the original experimental bench.

[0012] 2. The present invention adopts a wire sensor for measurement and realizes the positioning and tightening of the tool through a cylinder.

[0013] 3. The cylinder drives the moving contact and the stationary contact to make the moving contact and the stationary contact contact with the various measuring surfaces and measuring lines of the tool. This process is completed through automatic control, including the movement and tightening of the parts.

[0014] 4. The present invention finds out the "base plane", "cutting plane" and "orthogonal plane" needed for measurement in terms of structural design. There is no need to find these planes during measurement. The tool can be directly placed on the measuring instrument for measurement, which greatly saves measurement time.

[0015] 5. The present invention uses a display screen to directly read the measured data, thereby improving the measurement accuracy. The analog quantity output by the wire sensor is converted into an analog quantity through the analog-to-digital conversion module in the control box, and the converted digital quantity is input into the single-chip microcomputer, which then inputs the measured result into the display screen for display. This eliminates the process of the measurer estimating the reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the internal structure of the present invention.

[0020] Figure 5 yes Figure 3 A partial enlarged schematic diagram in the middle. DETAILED DESCRIPTION

[0021] See also Figures 1 to 5 As shown, an automatic measuring instrument for the front and back angles and the inclination angle of a turning tool comprises a measuring instrument base 1; stepped holes for installing a bottom support 2 are provided at the four corners of the measuring instrument base 1, and a fixed shell is installed on the measuring instrument base 1; a turning tool clamping seat 3 for placing a turning tool 4 is installed on the measuring instrument base 1, and the turning tool clamping seat 3 is a rectangular parallelepiped member, and the position of the turning tool 4 after being placed is not adjustable; a first L-shaped plate 5 is also installed on the measuring instrument base 1, and a first cylinder 6 is fixed to the upper protruding part of the first L-shaped plate 5, and a pressing plate for fixing and pressing the turning tool 4 is installed on the push plate of the first cylinder 6; a second L-shaped plate 7 is also installed on the measuring instrument base 1, and a second cylinder 8 and a third cylinder 9 are installed on the second L-shaped plate 7, and a right-angle plate 10 is fixedly connected to the working end of the second cylinder 8, and the main cutting edge of the turning tool 4 contacts the side of the forward protruding part of the right-angle plate 10, and the tip of the turning tool 4 contacts the right angle line of the right-angle plate 10;

[0022] The working end of the third cylinder 9 is connected to the rake angle and cutting edge inclination angle measuring component 11, and the rake angle and cutting edge inclination angle measuring component 11 is slidably connected to the second L-shaped plate 7. The rake angle and cutting edge inclination angle measuring component 11 is driven by the third cylinder 9 to move up and down along the guide rail. The third cylinder 9 drives the rake angle and cutting edge inclination angle measuring component 11 to move up and down along the guide rail, so that the two moving contacts 110 and one stationary contact 111 at the front end of the wire sensor 112 are in contact with the front cutting edge surface, thereby completing the measurement of the rake angle and cutting edge inclination angle.

[0023] A short L-shaped plate 12 is also installed on the measuring instrument base 1, and a fourth cylinder 14 is fixedly connected to the short L-shaped plate 12. The working end of the fourth cylinder 14 is connected to a back angle measuring assembly 13, and the back angle measuring assembly 13 is slidably connected to the short L-shaped plate 12. The back angle measuring assembly 13 is driven by the fourth cylinder 14 to slide back and forth along the short L-shaped plate 12, so that the front end moving contact 110 and the static contact 111 of the wire sensor 112 are in contact with the main back tool surface, and the back angle measurement is completed;

[0024] The display part includes a display screen, a single-chip microcomputer and an analog-to-digital conversion module, the wire sensor 112 is connected to the analog-to-digital conversion module, the digital-to-analog switch and the solenoid valve on the first cylinder 6, the solenoid valve on the second cylinder 8, the solenoid valve on the third cylinder 9 and the solenoid valve on the fourth cylinder 14 are all connected to the single-chip microcomputer, and the single-chip microcomputer is connected to the display screen in communication;

[0025] The display screen is installed on a fixed housing, and the display screen can also be connected to a computer via a data cable, and then the measurement data can be displayed through the computer. At the same time, the measurement results can also be stored in the computer and the measured data can be compared.

[0026] Furthermore, the front angle and blade inclination angle measuring component 11 includes two moving contacts 110, a stationary contact 111, a pull-wire sensor 112 and a sliding plate 113. The sliding plate 113 is slidably connected to the second L-shaped plate 7. A fixed seat 114 is installed at the lower end of the sliding plate 113. The pull-wire sensor 112 is fixedly connected to the upper end of the sliding plate 113 and the pull-wire end of the pull-wire sensor 112 is fixedly connected to the two moving contacts 110 slidably connected to the fixed seat 114. The stationary contact 111 is fixedly connected to the lower end of the fixed seat 114. The rear angle measuring component 13 has the same structure as the front angle and blade inclination angle measuring component 11.

[0027] The entire measuring process is controlled by four cylinders, wherein the first cylinder 6 is used to press the turning tool 4 to prevent the turning tool 4 from swinging, the second cylinder 8 is used to install the right-angle plate 10, the third cylinder 9 controls the movement of the rake angle and blade inclination angle measuring component 11, so that the moving contact 110 and the static contact 111 are in contact with the rake angle and blade inclination angle of the turning tool to achieve the measurement task, and the fourth cylinder 14 is used to move the back angle measuring component 13.

[0028] How to measure: The measurement of the main and secondary deflection angles is completed at the same time. The specific measurement principle is as follows:

[0029] (1) Measurement of rake angle and cutting edge inclination angle

[0030] The turning tool 4 is placed on the turning tool clamping seat 3, and the turning tool 4 must be aligned with the positioned right-angle plate 10. Press the start button, the first cylinder 5 presses the turning tool 4, and the two moving contacts 110 and the static contact 111 of the rake angle and blade inclination angle measuring component 11 are driven by the second cylinder 8 to move downward and contact the front cutting edge, thus completing the measurement of the rake angle and the blade inclination angle at the same time. The measurement result is displayed on the display screen, and the specific value is displayed on the display screen. The principle is that the two moving contacts 110 extend and retract until they are in close contact with the front cutting edge of the turning tool 4, and a straight line is determined between the two points. The straight-line distance is measured by the wire sensor 112, one of the moving contacts 110 is against the main cutting edge; the other static contact 111 directly presses a certain point on the main cutting edge of the turning tool 4, forming a straight-line distance with the previous moving contact 110 along the main cutting edge, and the displacement is also measured by the wire sensor 112. The distance between the two moving contacts 110 and between the moving contact 110 and the stationary contact 111 are known, and the wire sensor 112 can measure the distance moved by the moving contact 110. In this way, the two moving contacts 110 and the distance they move constitute a right triangle, and the moving contact 110 and the stationary contact 111 that fall on the main cutting edge and the distance moved by the moving contact 110 constitute another right triangle. The size of the front angle and the blade inclination angle are measured by the Pythagorean theorem of the right triangle. One right-angled side of the turning tool 4 is known, and the other right-angled side of the turning tool 4 is measured by the cooperation of the moving contact 110 and the wire sensor 112. Using the Pythagorean theorem, the principle of calculating the acute angle by the length of two right-angled sides can be used to obtain the front angle and the blade inclination angle. Similarly, the angle of the back angle is also obtained by this method.

[0031] (2) Back angle measurement

[0032] The turning tool 4 is placed on the turning tool clamping seat 3, and the turning tool 4 should be aligned with the positioned right angle plate 10. The first cylinder 5 presses the turning tool 4, and a moving contact 110 and a static contact 111 of the back angle measurement assembly 13 move forward and backward under the drive of the fourth cylinder 14. The measurement principle is that the static contact 110 is in close contact with a certain point of the main cutting edge and does not move, and the moving contact 110 extends until it contacts a certain point of the main back tool surface. The extension of the moving contact 110 is measured by the wire sensor 112. At this time, the linear displacement of the moving contact 110 and the static contact 111 is measured by the wire sensor 112. The parallel spacing between the moving contact 110 and the static contact 111 is known. In this way, a right triangle is formed by the linear displacement of the two contacts, the spatial parallel distance between the moving and static contacts, and the extension of the moving contact 110. The size of the back angle can be calculated by the Pythagorean theorem of the right triangle. When it contacts the main back tool surface, the measurement of the back angle is completed, and the result is displayed on the display screen.

[0033] The measured results can be stored on the computer, and the data measured by ordinary instruments can be combined with the automatic measurement data.

[0034] The obtained data is compared on the computer, and the measurement results are analyzed. The measurement angle diagram is drawn.

[0035] The present invention is mainly aimed at the specific structure of the measurement research of the front angle, the inclination angle and the back angle of the turning tool. If other angles need to be measured, the existing designed structure can be adjusted. Therefore, the present invention is simple, flexible, and has strong versatility, and is suitable for undergraduate teaching and practical application in factories and enterprises.

Claims

1. Automatic measuring instrument for front and back angles and cutting edge inclination angles of turning tools, characterized by: The measuring instrument comprises a measuring instrument base (1); stepped holes for mounting a bottom support (2) are provided at four corners of the measuring instrument base (1); a fixed housing is mounted on the measuring instrument base (1); a tool holder (3) for placing a tool (4) is mounted on the measuring instrument base (1); the tool holder (3) is a rectangular parallelepiped member; the position of the tool (4) cannot be adjusted after being placed; a first L-shaped plate (5) is also mounted on the measuring instrument base (1); a first protruding portion of the upper portion of the first L-shaped plate (5) is fixed with a first A cylinder (6), a pressing plate for fixing and pressing a turning tool (4) is installed on a push plate of the first cylinder (6), a second L-shaped plate (7) is also installed on the measuring instrument base (1), a second cylinder (8) and a third cylinder (9) are installed on the second L-shaped plate (7), a right-angle plate (10) is fixedly connected to the working end of the second cylinder (8), a main cutting edge of the turning tool (4) contacts the side surface of the forward extension of the right-angle plate (10), and a tip of the turning tool (4) contacts the right angle line of the right-angle plate (10); The working end of the third cylinder (9) is connected to the rake angle and cutting edge inclination angle measuring component (11), and the rake angle and cutting edge inclination angle measuring component (11) is slidably connected to the second L-shaped plate (7). The rake angle and cutting edge inclination angle measuring component (11) is driven by the third cylinder (9) to move up and down along the guide rail. The third cylinder (9) drives the rake angle and cutting edge inclination angle measuring component (111) to move up and down along the guide rail, so that two moving contacts (110) and one stationary contact (111) at the front end of the wire sensor (112) are in contact with the front cutting edge surface, thereby completing the measurement of the rake angle and cutting edge inclination angle. A short L-shaped plate (12) is also installed on the measuring instrument base (1), a fourth cylinder (14) is fixedly connected to the short L-shaped plate (12), a back angle measuring assembly (13) is connected to the working end of the fourth cylinder (14), and the back angle measuring assembly (13) is slidably connected to the short L-shaped plate (12), and the back angle measuring assembly (13) is driven by the fourth cylinder (14) to slide back and forth along the short L-shaped plate (12), so that the front end moving contact (110) and the stationary contact (111) of the wire drawing sensor (112) are in contact with the main back tool surface, thereby completing the measurement of the back angle; The display part comprises a display screen, a single chip microcomputer and an analog-to-digital conversion module, the wire pull sensor (112) is connected to the analog-to-digital conversion module, the digital-to-analog switch and the solenoid valve on the first cylinder (6), the solenoid valve on the second cylinder (8), the solenoid valve on the third cylinder (9) and the solenoid valve on the fourth cylinder (14) are all connected to the single chip microcomputer, and the single chip microcomputer is connected to the display screen for communication; The rake angle and blade inclination angle measuring component (11) comprises two moving contacts (110), a stationary contact (111), a wire sensor (112) and a sliding plate (113); the sliding plate (113) is slidably connected to the second L-shaped plate (7); a fixing seat (114) is installed at the lower end of the sliding plate (113); the wire sensor (112) is fixedly connected to the upper end of the sliding plate (113); and the wire end of the wire sensor (112) is fixedly connected to two moving contacts (110) slidably connected to the fixing seat (114); the stationary contact (111) is fixedly connected to the lower end of the fixing seat (114); the rake angle measuring component (13) has the same structure as the rake angle and blade inclination angle measuring component (11); The display screen is installed on a fixed housing, and the display screen can also be connected to a computer via a data cable, and then the measurement data can be displayed through the computer. At the same time, the measurement results can also be stored in the computer and the measured data can be compared.

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