CN101059337A - Digital type rotary support raceway diameter detection device - Google Patents

Abstract

The invention provides a digital slewing bearing raceway diameter detection device, which belongs to the technical field of industrial measurement. The detection device consists of a machine base, a torque motor, a screw nut pair, a limit block, a grating, a probe, a guide rail, a display, a controller and a connection line. The probe is composed of a steel ball (1), a steel ball (2 ), steel balls (3), connected to the fixed end formed by two steel balls (1), (2), connected to the moving end of a steel ball (3), and the two moving pairs driven by a torque motor The ends are respectively connected to the fixed end where the steel balls (1) and (2) are located and the moving end where the steel ball (3) is located. This detection device reduces the influence of traditional detection and comparison on the results of the accumulation of two measurement errors, and uses a torque motor to drive the moving pair to increase the stability of the measurement force, and the display is accurate and reliable, avoiding possible errors in manual reading of tools such as calipers . The operation is simple and the detection result is accurate.

Description

Digital slewing bearing raceway diameter detection device

technical field

The invention belongs to the technical field of industrial measurement, and in particular relates to a digital slewing support raceway diameter detection device, which is used for detecting the diameters of the inner raceway of the outer ring of a large slewing support and the outer raceway of the inner ring.

Background technique

The measurement of the raceway diameter of large slewing bearings has always been a major problem in the industry. Since the demand for products of the same specification is often small, and the matching gap between the inner and outer rings and the rollers is strictly required, the requirements for testing are particularly high.

Most of the current implementation schemes use measuring rods to detect the diameter of the inner and outer raceways of the slewing ring. One end of the measuring rod is fixed, and the other end is movable. The moving part is connected with a dial gauge, reset by a spring, and both ends are in contact with the raceway through steel balls. Before the measurement, compare the measuring rod with the vernier caliper to determine the fixed size of the measuring rod, then use the measuring rod to detect the raceway, and measure the algebraic difference between the raceway size and the fixed size by the dial indicator, and the sum of the algebraic difference and the fixed size is is the measured raceway size.

From the above detection method, it can be known that the current scheme has the following disadvantages, resulting in large measurement errors:

1. Due to the low accuracy of the vernier caliper for measuring the shape of the measuring rod, it directly affects the detection accuracy of the raceway diameter;

2. The measuring force is obtained by spring compression. Due to the inconsistency of the size, the measuring force is also different, resulting in measurement errors caused by different measuring forces;

3. Since the measured size is the diameter of the inner and outer raceways, after the measuring rod is compared on the vernier caliper, it is often necessary to remove the dial indicator to avoid damage to the dial indicator due to insufficient travel of the dial indicator. After the measuring rod enters the detection position of the workpiece to be measured, reinstall the dial indicator for detection. Installing the dial indicator twice will also cause measurement errors.

Contents of the invention

In view of the above problems in the prior art, the present invention provides a digital slewing bearing raceway diameter detection device. The technical solution adopted by the detection device is to use a three-point contact measurement method and use a grating detection method to directly display the detected diameter through the display. data.

The structure of the digital slewing bearing raceway diameter detection device provided by the present invention is composed of a machine base, a torque motor, a screw nut pair, a limit block, a grating, a measuring head (steel ball), a guide rail, a display, a controller and a connecting line. . The schematic diagram of the detection device mechanism is shown in Figure 1. The mechanism is composed as follows: connect the fixed ends of two steel balls 1 and 2, and the distance between the centers A and B of steel balls 1 and 2 is a; connect a steel ball 3 At the mobile end, the vertical distance b from the center C of the steel ball 3 to the line AB is obtained by grating detection; a mobile pair driven by a torque motor, and the two ends of the mobile pair are respectively connected to the fixed end where the steel balls 1 and 2 are located and the steel ball 3 The steel balls 1, 2 and 3 at the moving end, the fixed end and the moving end can all be replaced to adapt to different raceway arc diameters. The moving pair is driven by a torque motor to directly change the distance between the fixed end and the moving end to meet the requirements of measuring different slewing bearing raceway diameters. At the same time, the torque motor is adjusted to a given torque to obtain a suitable measurement force. The three-point contact measurement scheme can realize the automatic positioning of the testing equipment.

When testing the inner raceway of the outer ring of the slewing ring, the outer side of the steel ball is in contact with the raceway; the diameter of the raceway of the slewing ring can be obtained through calculation, and the result is directly displayed on the display.

When detecting the outer raceway of the inner ring of the slewing ring, the inner side of the steel ball is in contact with the raceway; the diameter of the raceway of the slewing ring can be obtained through calculation, and the result is directly displayed on the monitor.

The detection device reduces the influence of traditional detection and comparison on the results of the accumulation of two measurement errors, and uses a torque motor drive for the moving pair to increase the stability of the measurement force. The display is accurate and reliable, avoiding possible errors in manual reading of tools such as calipers. The operation is simple and the detection result is accurate.

Description of drawings

Figure 1: Schematic diagram of the digital slewing bearing inner raceway diameter detection device

Figure 2: Measuring principle diagram of digital slewing bearing inner raceway diameter detection device

Figure 3: Structural schematic diagram of digital slewing bearing outer raceway diameter detection device

Figure 4: Measuring principle diagram of digital slewing bearing outer raceway diameter detection device

In the figure: 1: steel ball, 2: steel ball, 3: steel ball

Detailed ways

Embodiment 1: The digital slewing bearing raceway diameter detection device is composed of a fixed end, a moving end, a grating, a torque motor, a motion controller, and a display. The fixed end is connected with two replaceable steel balls to adapt to different raceway arc diameters. The distance between the centers A and B of the steel balls is a, which is obtained through calibration. The mobile end is connected with a replaceable steel ball, which also adapts to the requirements of different raceway arc diameters. The vertical distance b from the steel ball center C to the line AB is obtained from the grating detection data. The moving pair is driven by a torque motor.

When detecting the outer raceway of the inner ring of the slewing ring, the inner side of the steel ball is in contact with the raceway (as shown in Figures 1 and 2); the diameter of the raceway of the slewing ring can be obtained by calculation.

When testing, first select the appropriate steel ball according to the size of the object to be measured. Place the fixed end first, and adjust the mobile end with the motor drive. The torque motor on the moving pair drives the moving end to move in a straight line to ensure that the moving end moves along the direction perpendicular to the line connecting the steel ball center A and B (fixed end) to realize the automatic positioning of the testing device. Measure the b value directly with the detection device. The system performs data processing on the values of a and b and outputs the actual measured size of the slewing bearing raceway through the display.

As shown in Figure 2, the center of the raceway diameter is 0, and it can be seen from the figure:

$\mathrm{<span\; class="notranslate">\; tg\&alpha;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; b</span>}}$

$\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arctg</span>}\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; b</span>}}$

β=2α

$\mathrm{<span\; class="notranslate">\; OB</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; sin</span>}\mathrm{<span\; class="notranslate">\; \&beta;</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="sin"\; filenames="A20071002302600062.png"\; state="\{\{state\}\}">sin</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}$

Radius of outer raceway of inner ring of slewing ring:

$\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; OB</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="sin"\; filenames="A20071002302600062.png"\; state="\{\{state\}\}">sin</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="tg"\; filenames="A20071002302600062.png"\; state="\{\{state\}\}">tg</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; 4</span>}\mathrm{<span\; class="notranslate">\; tg\&alpha;</span>}}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; b</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; r</span>}$

r: radius of steel ball 1, 2, 3

Note: These calculations are automatically completed by the system and realize the direct output of the R value.

Embodiment 2: The digital slewing bearing raceway diameter detection device is composed of a fixed end, a moving end, a grating, a torque motor, a motion controller, a display, and the like. The fixed end is connected with two replaceable steel balls to adapt to different raceway arc diameters. The distance between the centers A and B of the steel balls is a, which is obtained through calibration. The mobile end is connected with a replaceable steel ball, which also adapts to the requirements of different raceway arc diameters. The vertical distance b from the steel ball center C to the line AB is obtained from the grating detection data. The moving pair is driven by a torque motor.

When detecting the inner raceway of the outer ring of the slewing ring, the outer side of the steel ball is in contact with the raceway (as shown in Figures 3 and 4). The diameter of the slewing bearing raceway can be obtained by calculation.

When testing, first select the appropriate steel ball according to the size of the object to be measured. Place the fixed end first, and adjust the mobile end with the motor drive. The torque motor on the moving pair drives the ball screw nut pair (moving pair) to make a linear motion to ensure that the moving end moves along the direction perpendicular to the line connecting A and B (fixed end) of the steel ball center to realize the automatic positioning of the testing instrument. Use a grating detection device to detect the b value. The system performs data processing on the values of a and b and outputs the requested data through the display.

Calculation of inner raceway diameter of slewing bearing outer ring

As shown in Figure 4, the center of the raceway diameter is 0, and it can be seen from the figure:

$\mathrm{<span\; class="notranslate">\; tg\&alpha;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; b</span>}}$

$\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; arctg</span>}\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; b</span>}}$

β=2α

$\mathrm{<span\; class="notranslate">\; OB</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; sin</span>}\mathrm{<span\; class="notranslate">\; \&beta;</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="sin"\; filenames="A20071002302600062.png"\; state="\{\{state\}\}">sin</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}$

Radius of inner raceway of slewing bearing outer ring:

$\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; OB</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="sin"\; filenames="A20071002302600062.png"\; state="\{\{state\}\}">sin</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="tg"\; filenames="A20071002302600062.png"\; state="\{\{state\}\}">tg</figure-callout></span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}\mathrm{<span\; class="notranslate">\; \&alpha;</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; 4</span>}\mathrm{<span\; class="notranslate">\; tg\&alpha;</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; r</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; b</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; a</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ]</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; r</span>}$

r: radius of steel ball 1, 2, 3

Claims (5)

1. The digital slewing bearing raceway diameter detection device is characterized in that the detection device is composed of a machine base, a torque motor, a screw nut pair, a limit block, a grating, a measuring head, a guide rail, a display, a controller and a connection line. The measuring head is a contact measuring head composed of steel ball (1), steel ball (2) and steel ball (3), connected to the fixed end formed by two steel balls (1) and steel ball (2), The moving end of the steel ball (3) is connected to the fixed end where the steel ball (1), the fixed end where the steel ball (2) is located, and the moving end where the steel ball (3) is located are respectively connected with the two ends of the moving pair driven by a torque motor. 2. The digital slewing bearing raceway diameter detection device according to claim 1, characterized in that two replaceable steel balls (1) and steel balls (2) are connected to the fixed end to adapt to different raceway arc diameters , the distance between the centers A and B of the steel ball is a obtained through calibration and is a fixed value. 3. The digital slewing bearing raceway diameter detection device according to claim 1, characterized in that a replaceable steel ball (3) is connected to the moving end, which is also suitable for different raceway arc diameter requirements, and the steel ball center C to The vertical distance b of the line AB is obtained by grating detection. 4. The digital slewing bearing raceway diameter detection device according to claim 1, characterized in that the moving pair is driven by a torque motor, and the moving pair directly changes the distance between the fixed end and the moving end to meet the requirements of measuring different rotations. At the same time, adjust the torque motor to a given torque to obtain a suitable measurement force. 5. The digital slewing bearing raceway diameter detection device according to claim 1, characterized in that the three points consisting of the fixed end steel ball (1), the steel ball (2) and the moving end steel ball (3) In the contact measurement scheme, the controller drives the torque motor to drive the steel ball at the mobile end to make a linear motion to realize the automatic positioning of the detection device.

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