A device and method for detecting and measuring the circumferential profile of a precision forged mandrel

Abstract

This invention discloses a device and method for detecting the circumferential contour of a precision-forged mandrel, enabling precise measurement of the circumferential geometric contour of the cross-section of the spiral groove with male and female lines on the surface of the precision-forged mandrel. The device includes a base, a turntable system mounted on the base, a two-dimensional planar unidirectional moving device, a three-dimensional coordinate R-direction swinging device, and a three-jaw single-unit rotary clamping device positioned above the two-dimensional planar unidirectional moving device. The two-dimensional planar unidirectional moving device drives the three-dimensional coordinate R-direction swinging device and the three-jaw single-unit rotary clamping device to move along the Y-axis. The three-dimensional coordinate R-direction swinging device is poweredly connected to the three-jaw single-unit rotary clamping device, and drives the three-jaw single-unit rotary clamping device to swing along the R-direction. A contour measurement system mounted on the base includes a motion device and a contour measurement system. The contour measurement system includes a probe, and the motion device drives the contour measurement system to move along the X-axis and Z-axis.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a device and method for detecting the circumferential contour of a precision forged mandrel. Background Technology

[0002] Precision forging mandrels are key process equipment for radial forging of the inner bore of tubes. They are precision forming dies, and their structural morphology is similar to that of lead screws and splines. They have typical circumferential geometric profile characteristics, high dimensional accuracy requirements, and small spatial structural dimensions. Traditional gauges, block gauges, and even contact measurement systems and image measurement systems such as image measuring instruments, coordinate measuring machines, ordinary profile measuring instruments, and roundness measuring instruments cannot accurately measure the circumferential geometric profile of the mandrel. They cannot accurately and effectively evaluate the manufacturing quality of the mandrel, nor can they accurately guide the production and manufacturing of the mandrel, thus affecting product development and production.

[0003] To address the bottleneck problem in the precise measurement of the circumferential geometric contour of precision forged mandrels, this application provides a device and method for detecting the circumferential contour of precision forged mandrels. Summary of the Invention

[0004] To address the bottleneck problem in the precise measurement of the circumferential geometric profile of precision forged mandrels, this application provides a device and method for detecting the circumferential profile of precision forged mandrels, which enables accurate measurement of the circumferential geometric profile of the cross-section of the spiral groove with male and female lines on the surface of the precision forged mandrel.

[0005] The objective of this invention is achieved as follows:

[0006] A device for detecting the circumferential contour of a precision forged mandrel includes:

[0007] Base;

[0008] A turntable system (1) is set on the base. The turntable system (1) includes a two-dimensional plane unidirectional moving device (1-1). A three-dimensional coordinate R-direction swing device (1-2) and a three-jaw single-unit rotary clamping device (1-3) are set above the two-dimensional plane unidirectional moving device (1-1). The two-dimensional plane unidirectional moving device (1-1) is used to drive the three-dimensional coordinate R-direction swing device (1-2) and the three-jaw single-unit rotary clamping device (1-3) to move along the Y-axis. The three-dimensional coordinate R-direction swing device (1-2) is poweredly connected to the three-jaw single-unit rotary clamping device (1-3). The three-dimensional coordinate R-direction swing device (1-2) is used to drive the three-jaw single-unit rotary clamping device (1-3) to swing along the R direction.

[0009] A contour measurement system (2) is set on the base. The contour measurement system (2) includes a motion device and a contour measurement system. The contour measurement system includes a probe. The motion device drives the contour measurement system to move along the X-axis and the Z-axis.

[0010] Preferably, the two-dimensional planar unidirectional moving device (1-1) includes a base (1-1-1), a servo motor (1-1-2), a housing (1-1-4), and a translation seat. The base (1-1-1) is fixed on the base, the servo motor (1-1-2) is fixed on the base (1-1-1), and the housing (1-1-4) drives the translation seat through a gear and rack structure. The three-dimensional coordinate R-direction swing device (1-2) and the three-jaw single-unit rotation clamping device (1-3) are mounted on the translation seat.

[0011] Preferably, the three-dimensional coordinate R-direction swing device (1-2) includes a hollow cuboid shell (1-2-1) and a swing motor (1-2-2). The swing motor (1-2-2) is mounted on a translation seat. The hollow cuboid shell (1-2-1) is connected to the rotating shaft of the swing motor (1-2-2). The three-jaw single-unit rotating clamping device (1-3) is mounted on the hollow cuboid shell (1-2-1).

[0012] Preferably, the three-jaw single-unit rotary clamping device (1-3) includes a three-jaw clamping device (1-3-1) and a three-jaw rotary motor (1-3-2). The three-jaw rotary motor (1-3-2) is mounted on a hollow cuboid shell (1-2-1), and the three-jaw clamping device (1-3-1) is connected to the rotating shaft of the three-jaw rotary motor (1-3-2).

[0013] Preferably, the two-dimensional planar unidirectional moving device (1-1) is provided with a linear grating (1-1-3), which is used to collect the motion trajectory of moving along the Y-axis; the three-dimensional coordinate R-direction swing device (1-2) is provided with an R-direction circular grating (1-2-3), which is used to collect the motion trajectory of swinging along the R-direction; the three-jaw single-unit rotating clamping device (1-3) is provided with a circular grating (1-3-3), which is used to collect the motion trajectory of the three-jaw rotation; and the contour measurement system has a probe sensor, which is used to collect the contour height coordinate points of the precision forging mandrel.

[0014] Preferably, it also includes a connected control system and an industrial PC. The industrial PC sets the measurement parameters, and the control system transmits the operation commands to the contour measurement system (2), the two-dimensional plane unidirectional moving device (1-1), the three-dimensional coordinate R-direction swing device (1-2), and the three-jaw single-unit rotating clamping device (1-3). Each grating transmits the trajectory status to the grating acquisition circuit for judging the completion of the work, and the grating acquisition circuit and each motor feed back the data to the industrial PC.

[0015] A measurement method for a precision forged mandrel circumferential profile detection device includes the following steps:

[0016] S1. Calibrate the measuring device using a standard mandrel;

[0017] S2. Set the measurement parameters in the control system;

[0018] S3. The precision forging mandrel to be tested is clamped and fixed on the three-jaw single-unit rotary clamping device (1-3);

[0019] S4. The three-dimensional coordinate R-direction swing device (1-2) works, driving the three-jaw single-unit rotating clamping device (1-3) to rotate until the precision forging mandrel to be tested is completely horizontal; a measurement section is selected on the outer surface of the precision forging mandrel to be tested, the motion device works, driving the contour measurement system to move along the X-axis and Z-axis, so that the probe contacts the surface of the precision forging mandrel at the selected measurement section position, the two-dimensional plane unidirectional moving device (1-1) works, the two-dimensional plane unidirectional moving device (1-1) moves back and forth along the Y-axis, so that the probe selects the highest point of the contour of the precision forging mandrel, ensuring that the measurement point of the probe always passes perpendicularly through the center of the precision forging mandrel;

[0020] S5. Start measurement. The three-jaw single-unit rotary clamping device (1-3) drives the precision forging mandrel to rotate at the set speed. The probe contacts the contour surface of the precision forging mandrel and slides. The probe sensor collects and records the contour height coordinates of the precision forging mandrel. The circular grating (1-3-3) in the three-jaw single-unit rotary clamping device (1-3) records the rotation angle data.

[0021] S6. The control system fits the set of angle and height coordinate points collected by scanning into the outline of the precision forged mandrel composed of arcs and straight lines.

[0022] S7 and the industrial PC calculate and measure the shape and position of the fitted precision forged mandrel, and output the measurement results.

[0023] Preferably, in step S1, the dimensions of the standard mandrel are the same as the external dimensions of the precision forging mandrel to be tested.

[0024] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0025] By accurately measuring the dimensions of precision forged mandrels and employing effective transmission and coordination between mechanical devices and computer control systems, this technology fills a gap in the domestic precision forged mandrel testing equipment field, while improving the measurement accuracy and efficiency of precision forged mandrels. It provides testing technology and processing process guarantees and support for the stability of tube parts and the consistency of product quality. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the turntable system of the present invention;

[0027] Figure 2 This is a structural diagram of the contour measurement system of the present invention;

[0028] Figure 3 This is a structural diagram of the control system of the present invention;

[0029] Figure 4 This is a system configuration diagram of the special testing device for precision forged mandrels of the present invention;

[0030] Figure 5 This is a structural diagram of the two-dimensional planar unidirectional moving device of the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional coordinate R-direction swing device of the present invention;

[0032] Figure 7 This is a structural diagram of the three-jaw single-unit rotary clamping device of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the present invention.

[0034] Figure Labels

[0035] In the attached diagram: 1-Turntable system, 2-Contour measurement system, 1-1-Two-dimensional planar unidirectional moving device, 1-1-1-Base, 1-1-2-Servo motor, 1-1-3-Linear grating, 1-2-Three-dimensional coordinate R-direction swing device, 1-2-1-Hollow cuboid shell, 1-2-2-Drive rotary motor, 1-2-3-Circular grating, 1-3-Three-jaw single-unit rotary clamping device, 1-3-1-Three-jaw clamping device, 1-3-2-Drive rotary motor, 1-3-3-Circular grating. Detailed Implementation

[0036] The precision forging mandrel circumferential contour detection device of this application consists of three modules: a turntable system 1 for a precision forging mandrel special detection device, a contour measurement system 2, and a control system. Among them, the turntable system 1 for a precision forging mandrel special detection device is the core and key component of the precision forging mandrel circumferential contour detection device. The contour measurement system is a conventional stylus-type contour measuring instrument.

[0037] The dedicated testing device turntable system 1 consists of three independent rotary moving units in different directions, from bottom to top: a two-dimensional planar unidirectional moving device 1-1, a three-dimensional coordinate R-direction swinging device 1-2, and a three-jaw single-unit rotary clamping device 1-3. Each unit independently completes rotary movement while maintaining the stability of the device. The two-dimensional planar unidirectional moving device 1-1 comprises a base 1-1-1 (with a housing), a servo motor 1-1-2, and a linear grating 1-1-3. The three-dimensional coordinate R-direction swinging device 1-2 comprises a hollow cuboid housing 1-2-1, a drive rotary motor, and an R-direction circular grating 1-2-3. The three-jaw single-unit rotary clamping device 1-3 comprises a three-jaw clamping device 1-3-1, a three-jaw rotary motor 1-3-2, and a circular grating 1-3-3.

[0038] The contour measurement system 2 in this application consists of a motion device and a contour measurement system, comprising a linear grating, a servo motor, a column, a base, guide rails, a probe system, and sensors. The base of the measurement system is made of granite with a low coefficient of thermal expansion, reducing the influence of the environment on the temperature of the measurement system; the base includes four support feet to adjust the level of the base and has good shock absorption measures; all guide rails adopt a closed structure design to achieve dustproof and stable functions, enabling the system to maintain high accuracy even during long-term operation; an isolation strip is used to isolate the measurement system from the surrounding environment, cutting off the vibration influence of the surrounding environment on the measurement system.

[0039] Overall, the control system in this application is the central unit of the circumferential contour detection device, which transmits system operation and command transmission to the contour measurement system 2, the two-dimensional plane unidirectional moving device 1-1, the three-dimensional coordinate R-direction swing device 1-2, and the three-jaw single-unit rotating clamping device 1-3 for command issuance and signal transmission.

[0040] The industrial PC sends commands to the corresponding servo motors (all motors in this invention are servo motors). The servo motors that receive the commands drive the contour measurement system 2, the two-dimensional plane unidirectional moving device 1-1, the three-dimensional coordinate R-direction swing device 1-2, and the three-jaw single-unit rotating clamping device 1-3 to move. At this time, the linear / circular grating is responsible for collecting the motion trajectory and transmitting the trajectory information to the grating acquisition circuit for work completion judgment. The grating acquisition circuit and the servo motor feed the data back to the industrial PC.

[0041] Measurement method:

[0042] This application addresses the characteristics of precision-forged mandrels, such as small diameter and grooved inner walls, by employing a reliable contact measurement method. It utilizes a small, highly sensitive stylus to precisely slide relative to a fixed section on the mandrel surface, thereby measuring, recording, and evaluating the contour and dimensions of any cross-section of the precision-forged mandrel.

[0043] 1. Calibrate the measuring device using a standard mandrel. The calibration method is the same as the precision forging mandrel testing method. The diameter of the cylindrical standard mandrel should be equal to or close to the external dimensions of the precision forging mandrel to ensure the accuracy of the testing process.

[0044] 2. Set the turntable speed and other required measurement conditions in the measurement software;

[0045] 3. Clamp the precision forged mandrel onto a three-jaw single-unit rotary reliable clamping device;

[0046] 4. Swing the three-dimensional coordinate R-direction swing device 1-2 to the measurement position and automatically adjust it to a completely horizontal position. The three-jaw single-unit rotary clamping device 1-3 clamps the precision forging mandrel to be measured, selects the measurement section, and places the probe in contact with the surface of the precision forging mandrel. The two-dimensional plane unidirectional moving device 1-1 moves back and forth along the Y-axis to select the highest point of the precision forging mandrel profile on the measurement system, ensuring that the measurement point always passes perpendicularly through the center of the circle to avoid errors caused by eccentricity.

[0047] The three-dimensional coordinate R-direction oscillation device 1-2 can be adjusted in position according to different measuring parts and different measuring positions to achieve better and more accurate measurements. For example, if there is an inclined part, it needs to be tilted.

[0048] 5. Start measurement. The three-jaw single-unit rotary clamping device 1-3 drives the precision forging mandrel to rotate at the speed set by the system. The probe contacts the contour surface of the precision forging mandrel and slides. The probe moves up and down along the contour surface of the precision forging mandrel. The probe sensor records the height coordinate point of the contour of the precision forging mandrel. The circular grating 1-3-3 in the three-jaw single-unit rotary clamping device 1-3 records the rotation angle data.

[0049] 6. The control system fits the set of angle and height coordinate points collected by scanning into the outline of the precision forged mandrel composed of arcs and straight lines.

[0050] 7. Calculate and measure the shape and position of the fitted precision forged mandrel, and output the measurement results.

[0051] By accurately measuring the dimensions of precision forged mandrels and employing effective transmission and coordination between mechanical devices and computer control systems, this technology fills a gap in the domestic precision forged mandrel testing equipment field, while improving the measurement accuracy and efficiency of precision forged mandrels. It provides testing technology and processing process guarantees and support for the stability of tube parts and the consistency of product quality.

[0052] In this embodiment, a tapered probe with a tip size of 0.001 mm is used for measurement. The forged mandrel is clamped on a turntable, and the mandrel's anterior groove is rotated to the top. The probe contacts the surface of the anterior groove of the forged mandrel. The turntable moves the forged mandrel back and forth in the Y direction, automatically finding the highest point of the mandrel. The probe stops at this position, ensuring that the probe passes perpendicularly through the center of the forged mandrel. During measurement, the probe remains stationary, while the forged mandrel rotates due to the turntable. The tapered probe continuously collects data on the surface of the mandrel, thus forming the geometric contour of the forged mandrel surface. Measurement and analysis software is used to measure and analyze the geometric contour. This device and method achieve precise measurement of the circumferential geometric contour of the cross-section of the spiral groove of the mandrel's anterior and posterior grooves, providing technology and equipment for the precise and efficient manufacturing of forged mandrels and tubes.

[0053] The X and Y axes are perpendicular in the horizontal plane, and the Z axis is vertical.

[0054] The control system 3 precisely controls the contour measurement system 2, the two-dimensional plane unidirectional moving device 1-1, the three-dimensional coordinate R-direction swing device 1-2, and the three-jaw single-unit rotary clamping device 1-3 through the PMAC main control board.

[0055] The contour measurement system 2, the two-dimensional plane unidirectional moving device 1-1, the three-dimensional coordinate R-direction swing device 1-2, and the three-jaw single-unit rotating clamping device 1-3 all use servo motors and linear / circular grating ruler systems to precisely control the movement direction and path of the equipment. Under the command of the control system 3, their movements do not interfere with or affect each other.

[0056] The two-dimensional plane unidirectional moving device 1-1, the three-dimensional coordinate R-direction swinging device 1-2, and the three-jaw single-unit rotating clamping device 1-3 all have automatic correction functions to avoid the measurement error caused by clamping deviation. In addition, the two-dimensional plane unidirectional moving device 1-1, combined with the control system 3, has the function of automatically finding the highest and lowest points to ensure that the measurement point always passes perpendicularly through the center of the circle during measurement, thus avoiding the error caused by eccentricity.

[0057] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A device for detecting the circumferential contour of a precision forged mandrel, characterized in that, include: Base; A turntable system (1) is set on the base. The turntable system (1) includes a two-dimensional plane unidirectional moving device (1-1). A three-dimensional coordinate R-direction swing device (1-2) and a three-jaw single-unit rotary clamping device (1-3) are set above the two-dimensional plane unidirectional moving device (1-1). The two-dimensional plane unidirectional moving device (1-1) is used to drive the three-dimensional coordinate R-direction swing device (1-2) and the three-jaw single-unit rotary clamping device (1-3) to move along the Y-axis. The three-dimensional coordinate R-direction swing device (1-2) is powered to connect with the three-jaw single-unit rotary clamping device (1-3). The three-dimensional coordinate R-direction swing device (1-2) is used to drive the three-jaw single-unit rotary clamping device (1-3) to swing along the R direction. A contour measurement system (2) is set on the base. The contour measurement system (2) includes a motion device and a contour measurement system. The contour measurement system includes a probe. The motion device drives the contour measurement system to move along the X-axis and the Z-axis. The two-dimensional planar unidirectional moving device (1-1) includes a base (1-1-1), a servo motor (1-1-2), a housing (1-1-4), and a translation seat. The base (1-1-1) is fixed on the base, the servo motor (1-1-2) is fixed on the base (1-1-1), and the housing (1-1-4) drives the translation seat through a gear and rack structure. The three-dimensional coordinate R-direction swing device (1-2) and the three-jaw single-unit rotation clamping device (1-3) are installed on the translation seat.

2. The device for detecting the circumferential contour of a precision forged mandrel according to claim 1, characterized in that: The three-dimensional coordinate R-direction swing device (1-2) includes a hollow cuboid shell (1-2-1) and a swing motor (1-2-2). The swing motor (1-2-2) is mounted on a translation seat. The hollow cuboid shell (1-2-1) is connected to the rotating shaft of the swing motor (1-2-2). The three-jaw single-unit rotating clamping device (1-3) is mounted on the hollow cuboid shell (1-2-1).

3. The device for detecting the circumferential contour of a precision forged mandrel according to claim 2, characterized in that: The three-jaw single-unit rotary clamping device (1-3) includes a three-jaw clamping device (1-3-1) and a three-jaw rotary motor (1-3-2). The three-jaw rotary motor (1-3-2) is mounted on a hollow cuboid shell (1-2-1), and the three-jaw clamping device (1-3-1) is connected to the rotating shaft of the three-jaw rotary motor (1-3-2).

4. The device for detecting the circumferential contour of a precision forged mandrel according to claim 3, characterized in that: The two-dimensional planar unidirectional moving device (1-1) is equipped with a linear grating (1-1-3), which is used to collect the motion trajectory of moving along the Y-axis. The three-dimensional coordinate R-direction swing device (1-2) is equipped with an R-direction circular grating (1-2-3), which is used to collect the motion trajectory of swinging along the R-direction. The three-jaw single-unit rotating clamping device (1-3) is equipped with a circular grating (1-3-3), which is used to collect the motion trajectory of the three-jaw rotation. The contour measurement system has a probe sensor, which is used to collect the contour height coordinate points of the precision forging mandrel.

5. The device for detecting the circumferential contour of a precision forged mandrel according to claim 4, characterized in that: It also includes a connected control system and an industrial PC. The industrial PC sets the measurement parameters, and the control system transmits the operation instructions to the contour measurement system (2), the two-dimensional plane unidirectional moving device (1-1), the three-dimensional coordinate R-direction swing device (1-2), and the three-jaw single-unit rotating clamping device (1-3). Each grating transmits the trajectory status to the grating acquisition circuit for work completion judgment, and the grating acquisition circuit and each motor feed back the data to the industrial PC.

6. A measurement method based on the precision forging mandrel circumferential contour detection device according to claim 1, characterized in that, Includes the following steps: S1. Calibrate the measuring device using a standard mandrel; S2. Set the measurement parameters in the control system; S3. The precision forging mandrel to be tested is clamped and fixed on the three-jaw single-unit rotary clamping device (1-3); S4. The three-dimensional coordinate R-direction swing device (1-2) works, driving the three-jaw single-unit rotating clamping device (1-3) to rotate until the precision forging mandrel to be tested is completely horizontal; a measurement section is selected on the outer surface of the precision forging mandrel to be tested, the motion device works, driving the contour measurement system to move along the X-axis and Z-axis, so that the probe contacts the surface of the precision forging mandrel at the selected measurement section position, the two-dimensional plane unidirectional moving device (1-1) works, the two-dimensional plane unidirectional moving device (1-1) moves back and forth along the Y-axis, so that the probe selects the highest point of the contour of the precision forging mandrel, ensuring that the measurement point of the probe always passes perpendicularly through the center of the precision forging mandrel; S5. Start measurement. The three-jaw single-unit rotary clamping device (1-3) drives the precision forging mandrel to rotate at the set speed. The probe contacts the contour surface of the precision forging mandrel and slides. The probe sensor collects and records the contour height coordinates of the precision forging mandrel. The circular grating (1-3-3) in the three-jaw single-unit rotary clamping device (1-3) records the rotation angle data. S6. The control system fits the set of angle and height coordinate points collected by scanning into the outline of the precision forged mandrel composed of arcs and straight lines. S7 and the industrial PC calculate and measure the shape and position of the fitted precision forged mandrel, and output the measurement results.

7. The measurement method based on the circumferential contour detection device of a precision forged mandrel according to claim 6, characterized in that: In step S1, the dimensions of the standard mandrel are the same as the external dimensions of the precision forging mandrel to be tested.

Images