Automatic measurement method for key parameters of grinding wheel on worm grinding wheel grinding machine

Abstract

This invention discloses an automatic measurement method for key parameters of a grinding wheel on a worm gear grinding machine, relating to the field of grinding machine technology. The method includes: moving the axis of the roller and the axis of the worm gear grinding wheel to the same horizontal plane, making them parallel; moving the worm gear grinding wheel until it contacts the roller; and recording the coordinate P of the worm gear grinding wheel at this point. x0 According to the coordinate P of the worm grinding wheel x0 Calculate the diameter d of the worm grinding wheel as According to the diameter d of the worm grinding wheel as Grinding wheel normal module M n Number of grinding wheel heads Z, grinding wheel tooth tip height h as The invention involves calculating the helix angle γ of the worm grinding wheel; aligning the extension direction of the tooth grooves on the worm grinding wheel with the radial direction of the roller; moving the worm grinding wheel until the roller is positioned within the tooth groove; and measuring the current center position of the tooth groove. Finally, the invention moves the worm grinding wheel back to the current center position of the tooth groove and measures the depth of the tooth groove. This invention reduces the workload of workers during measurement.

Description

Technical Field

[0001] This invention relates to the field of gear grinding machine technology, and in particular to an automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine. Background Technology

[0002] Worm wheel gear grinding machines are commonly used gear grinding equipment in industrial production. They process gears and other workpieces by grinding with a worm-shaped grinding wheel, and are used for the mass production of shaft and disc-shaped hardened cylindrical gears. They can grind gears with modified tooth profiles such as drum-shaped and tapered teeth, and can also use modified diamond rollers to grind modified gears. After changing the grinding wheel, the worm wheel gear grinding machine requires inputting parameters such as the grinding wheel diameter and the grinding wheel tooth groove phase angle to achieve automatic and precise tool setting. Current gear grinding machines cannot automatically measure the effective diameter of the grinding wheel, the tooth groove depth, the grinding wheel phase angle, and the corresponding tooth groove position. The grinding wheel diameter needs to be measured manually and then input. The grinding wheel tooth groove phase angle is determined by manually moving the machine tool to find the dressing angle and lateral coordinate position between the roller and the grinding wheel. The operation process is relatively complex and labor-intensive. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine, which can reduce the labor intensity of workers during measurement.

[0004] An automatic measurement method for key parameters of a grinding wheel on a worm gear grinding machine according to a first aspect of the present invention includes the following steps: Move the axes of the roller and the worm wheel to the same horizontal plane, making them parallel. Move the worm wheel until it contacts the roller, and record the coordinates of the worm wheel at this point. ; According to the coordinates of the worm grinding wheel The diameter of the roller The coordinates of the roller Calculate the diameter of the worm grinding wheel. ; According to the diameter of the worm grinding wheel Grinding wheel normal module Number of grinding wheel heads Grinding wheel tooth tip height Calculate the helix angle of the worm gear grinding wheel. ; The worm gear grinding wheel axis is deflected to an angle with the axis of the roller. The extension direction of the tooth groove on the worm grinding wheel is parallel to the radial direction of the roller. The worm grinding wheel is moved so that the roller is located in the tooth groove, and the current center position of the tooth groove of the worm grinding wheel is measured. Move the worm wheel so that the roller is positioned at the current center position of the tooth groove, and measure the depth of the tooth groove of the worm wheel.

[0005] According to some embodiments of the present invention, moving the worm wheel until it contacts the roller includes: The roller and the worm wheel are rotated, and the worm wheel is moved closer to the roller while an AE acoustic emission sensor is used to detect whether the roller is in contact with the worm wheel.

[0006] According to some embodiments of the present invention, the diameter of the worm grinding wheel The calculation method is as follows .

[0007] According to some embodiments of the present invention, the helix angle of the worm grinding wheel The calculation method is as follows .

[0008] According to some embodiments of the present invention, moving the worm wheel to position the roller in the tooth groove includes: Stop the worm gear grinding wheel from rotating and drive the roller to rotate; Move the worm gear grinding wheel to the coordinate. Place, As a preset value, if the worm wheel moves to the coordinate... During the process, if the AE acoustic emission sensor detects a contact sound signal, it will move the worm wheel away from the roller, then drive the worm wheel to rotate by a specified angle, and then drive the worm wheel to the coordinate axis. Move at the coordinate until the worm gear grinding wheel moves to the coordinate. At the location, and the AE acoustic emission sensor did not detect any contact sound signal; Then record the rotation angle of the worm gear grinding wheel.

[0009] According to some embodiments of the present invention, measuring the current center position of the tooth groove of the worm grinding wheel includes: moving the worm grinding wheel axially, using an AE acoustic emission sensor to detect whether the roller is in contact with the current sidewall of the tooth groove of the worm grinding wheel, and recording the coordinates of the worm grinding wheel when the two sidewalls of the current tooth groove of the worm grinding wheel are in contact with the roller. and Calculate the current tooth groove center position of the worm gear grinding wheel. P y.

[0010] According to some embodiments of the present invention, measuring the depth of the tooth grooves on the worm grinding wheel includes: Move the worm grinding wheel closer to the roller, and record the coordinates of the worm grinding wheel when the AE acoustic emission sensor detects a contact sound signal. Calculate the depth of the tooth groove.

[0011] According to some embodiments of the present invention, the dimension of the roller edge is smaller than the dimension of the bottom of the tooth groove on the worm wheel.

[0012] According to some embodiments of the present invention, the thickness of the edge of the roller is less than the thickness of the center of the roller.

[0013] According to some embodiments of the present invention, both the roller and the worm wheel are driven to rotate by an electric motor.

[0014] An automatic measurement method for key parameters of a grinding wheel on a worm gear grinding machine according to an embodiment of the present invention has at least the following beneficial effects: (1) Using an AE acoustic emission sensor to detect whether the roller is in contact with the worm grinding wheel, the worm grinding wheel gear grinding machine is controlled to run along a specific movement trajectory. The automation level is high and it can effectively improve the efficiency of measuring various parameters of the worm grinding wheel. (2) First measure the diameter of the worm grinding wheel, then calculate the helix angle of the worm grinding wheel. To allow the worm wheel to tilt This allows the roller to fit into the tooth groove; (3) The measurement results are not affected by human factors and are highly accurate.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a cross-sectional schematic diagram of an embodiment of the present invention.

[0017] Icon labels: Roller 100; 200 worm gear grinding wheel; Gear groove 300. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1 As shown, an embodiment of the present invention provides an automatic measurement method for key parameters of a grinding wheel on a worm gear grinding machine, comprising: mounting a worm gear grinding wheel 200 onto the worm gear grinding machine, wherein the outer wall of the worm gear grinding wheel 200 has helical tooth grooves 300. The specific structure of the worm gear grinding machine is prior art and will not be described in detail. The axis of the worm gear grinding wheel 200 and the rotation axis of the roller 100 are moved to the same horizontal plane. The axis of the roller 100 is defined as the y-axis direction, and the direction perpendicular to the y-axis in the horizontal plane including the y-axis direction is defined as the x-axis direction. The worm gear grinding machine is controlled to make the rotation axis of the roller 100 and the rotation axis of the worm gear grinding wheel 200 parallel, and the worm gear grinding wheel 200 is moved along the x-axis direction until it contacts the roller 100. The coordinates of the worm gear grinding wheel 200 on the x-axis at this time are measured and recorded. The coordinates of the worm grinding wheel 200 on the x-axis This is the distance from the rotation axis of the worm grinding wheel 200 to the zero point of the x-axis.

[0023] Obtain the coordinates of the worm grinding wheel 200 on the x-axis. Then, based on the coordinates of the worm grinding wheel 200 on the x-axis... 100mm diameter roller Coordinates of roller 100 Calculate the diameter of a worm grinding wheel (200mm). ; Coordinates of roller 100 This represents the distance from the rotation axis of roller 100 to the zero point of the x-axis. The coordinates of the worm grinding wheel 200 on the x-axis are... The coordinates of roller 100 on the x-axis Measurements can be taken manually using tools such as vernier calipers, or automatically by arranging position sensors on a worm gear grinding machine.

[0024] Then, based on the worm grinding wheel diameter of 200... Grinding wheel normal module Number of grinding wheel heads Grinding wheel tooth tip height Calculate the helix angle of the worm grinding wheel 200. ; Grinding wheel normal module Number of grinding wheel heads Grinding wheel tooth tip height All parameters are directly available for the worm grinding wheel 200 and can be obtained by consulting the manufacturer's parameter manual for the worm grinding wheel 200.

[0025] Then the axis of the worm grinding wheel 200 is deflected to an angle with the axis of the roller 100. The worm gear grinding machine itself has the function of precisely controlling the deflection angle of the worm gear 200. Using the helix angle of the worm gear 200 calculated in the previous step... The angle of rotation of the worm grinding wheel 200 axis is controlled to allow the roller 100 to extend into the tooth groove 300, thereby improving measurement efficiency and automation. The extension direction of the tooth groove 300 on the worm grinding wheel 200 is made parallel to the radial direction of the roller 100. The worm grinding wheel 200 is moved along the x-axis until the roller 100 is positioned within the tooth groove 300, and then the roller 100 is moved relative to the tooth groove 300 along the y-axis. The current center position of the tooth groove 300 on the worm grinding wheel 200 is measured.

[0026] The worm grinding wheel 200 is moved so that the roller 100 is positioned at the center of the current tooth groove 300, and the depth of the tooth groove 300 is measured. The helix angle of the worm grinding wheel 200 is calculated by measuring its diameter. Then, based on the helix angle, the worm grinding wheel 200 is deflected so that the roller 100 can enter the tooth groove 300 to measure its center position and depth. This method is highly automated and effectively improves the efficiency of measuring various parameters of the worm grinding wheel 200.

[0027] Reference Figure 1As shown, it can be understood that moving the worm grinding wheel 200 until it contacts the roller 100 includes: the worm grinding machine driving the roller 100 and the worm grinding wheel 200 to rotate; simultaneously moving the worm grinding wheel 200 closer to the roller 100 in the x-axis direction; and using an AE acoustic emission sensor to detect whether the roller 100 is in contact with the worm grinding wheel 200. Since both the roller 100 and the worm grinding wheel 200 are rotating, a specific frequency of frictional sound will be generated at the moment of contact. The AE acoustic emission sensor detects the specific frequency sound characteristics or sound intensity to determine whether the roller 100 and the worm grinding wheel 200 are in contact. Because both the worm grinding wheel 200 and the roller 100 are rotating, when the worm grinding wheel 200 and the roller 100 approach each other, the roller 100 cannot enter the tooth groove 300 on the worm grinding wheel 200; it can only contact the outer wall of the worm grinding wheel 200 first. The AE acoustic emission sensor detects whether the outer peripheral wall of the roller 100 is in contact with the outer peripheral wall of the worm grinding wheel 200. When the AE acoustic emission sensor detects the sound of the roller 100 and the worm grinding wheel 200 rubbing against each other, the worm grinding wheel 200 and the roller 100 stop approaching each other. Then, the coordinates of the worm grinding wheel 200 and the roller 100 at this time are recorded. Since the diameter of the roller 100 is known, the diameter of the worm grinding wheel 200 can be calculated.

[0028] Reference Figure 1 As shown, it can be understood that the worm grinding wheel has a diameter of 200. The calculation method is as follows Due to the diameter of roller 100 The coordinates of roller 100 on the x-axis All values ​​are fixed and can be reused. Therefore, during measurement, only the coordinates of the worm wheel 200 on the x-axis when the worm wheel 200 contacts the roller 100 need to be measured. The diameter of the worm grinding wheel 200 can then be calculated. .

[0029] Reference Figure 1 As shown, it can be understood that the helix angle of the worm grinding wheel 200 is... The calculation method is as follows Due to the normal module of the grinding wheel Number of grinding wheel heads Grinding wheel tooth tip height These are all inherent parameters of the worm grinding wheel 200, and can be reused after one measurement. Therefore, only the diameter of the worm grinding wheel 200 needs to be calculated during measurement. The helix angle of the worm grinding wheel 200 can then be calculated. .

[0030] Reference Figure 1As shown, it can be understood that moving the worm grinding wheel 200 to position the roller 100 within the tooth groove 300 includes: stopping the rotation of the worm grinding wheel 200 and locking the worm grinding wheel 200 to prevent it from rotating, and driving the roller 100 to rotate; the worm grinding wheel 200 can be driven to rotate by a motor with a self-locking function. Then, the worm grinding wheel 200 is moved along the x-axis to the coordinate... Place, These are preset values, typically selected from empirical values ​​within a certain range. It is foreseeable that... The smallest measurable depth not exceeding 300mm of the tooth groove. An excessively large size will prevent the worm wheel 200 from moving to the coordinate under any circumstances. Place. If the depth is too small, the roller 100 will not penetrate the tooth groove 300 deeply enough. Since the worm wheel 200 may become asymmetrical after use, insufficient depth of roller 100 penetration into the tooth groove 300 will prevent it from contacting the sides of the tooth groove 300 in subsequent steps. The roller 100 should be moved into the tooth groove 300 of the worm wheel 200 without contacting the bottom wall of the tooth groove 300. If the worm wheel 200 moves to the coordinate... During the process, the AE acoustic emission sensor detected a contact sound signal, indicating that the tooth groove 300 of the worm grinding wheel 200 and the roller 100 did not coincide in the x-axis direction, and the roller 100 made contact with the outer peripheral wall of the worm grinding wheel 200. At this time, it is necessary to move the worm grinding wheel 200 away from the roller 100 to separate the worm grinding wheel 200 from the roller 100. Then, drive the worm grinding wheel 200 to rotate by a specified angle to change the phase of the tooth groove 300. Then drive the worm grinding wheel 200 to the coordinate... The device moves to the specified location. If the AE acoustic emission sensor detects a contact acoustic signal trigger again during the movement, the above steps are repeated until the worm wheel 200 moves to the coordinate. At the location, and the AE acoustic emission sensor did not detect a contact sound signal; since the tooth grooves 300 on the worm grinding wheel 200 are helical, after the worm grinding wheel 200 rotates around its own axis by a certain angle, the tooth grooves 300 and the roller 100 can be aligned in the x-axis direction. The tooth grooves 300 and the roller 100 are aligned in the x-axis direction by repeatedly trying to rotate the worm grinding wheel 200. It is foreseeable that the motor driving the worm grinding wheel 200 to rotate around its own axis is a servo motor, so that the worm grinding wheel 200 can be rotated by the same angle each time. If the angle of rotation of the worm grinding wheel 200 is too large or too small each time, more attempts will be needed to align the tooth grooves 300 and the roller 100 in the x-axis direction. Therefore, the angle of rotation of the worm grinding wheel 200 each time is selected empirically between 10 degrees and 60 degrees. Measure and record the distance when the worm grinding wheel 200 moves to the coordinate... The rotation angle of the worm grinding wheel 200 around its own axis when the AE acoustic emission sensor does not detect a contact acoustic signal. The rotation angle of the worm grinding wheel 200 around its own axis can be measured by the angle measuring device built into the servo motor, or by using other angle sensors.

[0031] Reference Figure 1 As shown, it can be understood that measuring the current center position of the tooth groove 300 of the worm grinding wheel 200 includes: maintaining the coordinates of the worm grinding wheel 200 in the x-axis direction as follows: The worm grinding wheel 200 is moved reciprocally along its axial direction. An AE acoustic emission sensor is used to detect whether the roller 100 is in contact with the side wall of the current tooth groove 300 of the worm grinding wheel 200. The coordinates of the worm grinding wheel 200 on the y-axis are measured and recorded when both side walls of the current tooth groove 300 of the worm grinding wheel 200 are in contact with the roller 100. and Since the worm grinding wheel 200 moves along its axial direction, the midpoint of the contact point between the two side walls of the current tooth groove 300 of the worm grinding wheel 200 and the roller 100 is the center position of the current tooth groove 300 of the grinding wheel. Calculate the center position of the current tooth groove 300 of the worm grinding wheel 200. P y The calculation method for the center position of the current tooth groove 300 of the worm grinding wheel 200 is as follows: P y =( P y1 + P y2 ) / 2.

[0032] Reference Figure 1 As shown, it can be understood that measuring the tooth groove depth 300 of the worm grinding wheel 200 includes: First move the worm gear grinding wheel 200 to the x-axis coordinate. The y-axis coordinate is P y1 + P y2 At position / 2. Move the worm wheel 200 towards the roller 100, and measure and record the coordinates of the worm wheel 200 when the AE acoustic emission sensor detects contact. Since the roller 100 is located at the center of the grinding wheel groove 300, the sound detected by the AE acoustic emission sensor is the sound generated by the friction between the roller 100 and the bottom wall of the grinding wheel groove 300. Therefore, the depth of the grinding wheel groove 300 is: .

[0033] Reference Figure 1As shown, it can be understood that the thickness of the edge of the roller 100 in the y-axis direction is less than the thickness of the bottom of the tooth groove 300 on the worm wheel 200 in the y-axis direction. This allows the roller 100 to move to contact the bottom wall of the tooth groove 300 at the center of the tooth groove 300, thereby improving the accuracy of the detection.

[0034] Reference Figure 1 As shown, it can be understood that the thickness of the edge of the roller 100 is less than the thickness of the center of the roller 100. This is beneficial to improving the mechanical strength of the roller 100 and increasing its service life.

[0035] Reference Figure 1 As shown, it can be understood that both the roller 100 and the worm wheel 200 are driven to rotate by an electric motor. The roller 100 can be driven to rotate by a regular electric motor, while the worm wheel 200 is driven to rotate by a servo motor to control the angle of rotation of the worm wheel 200 around itself.

[0036] It is foreseeable that the worm gear grinding machine will have the ability to control and measure the coordinates of the worm gear 200 on the x-axis and y-axis, as well as the ability to control and measure the angle between the worm gear 200 and the horizontal plane, so as to automate the measurement of various parameters and improve work efficiency.

[0037] The working principle of this invention is as follows: An AE acoustic emission sensor detects whether the roller 100 is in contact with the worm wheel 200. When the AE acoustic emission sensor detects the sound of friction between the roller 100 and the worm wheel 200, the worm wheel 200 and the roller 100 stop approaching each other. The coordinates of the worm wheel 200 and the roller 100 at this time are then recorded. Through a series of movements of the worm wheel 200, the roller 100 contacts the worm wheel 200 at different positions, thereby obtaining various parameters of the worm wheel 200. This invention features a high degree of automation and high detection accuracy.

[0038] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An automatic measurement method for key parameters of a grinding wheel on a worm gear grinding machine, characterized in that, include: Move the axis of the roller (100) and the axis of the worm wheel (200) to the same horizontal plane, and make the axis of the roller (100) and the axis of the worm wheel (200) parallel. Move the worm wheel (200) until it contacts the roller (100), and record the coordinate value of the worm wheel (200) on the x-axis at this time. ; Based on the coordinate values ​​on the x-axis of the worm grinding wheel (200) The diameter of the roller (100) The coordinate values ​​on the x-axis of the roller (100) Calculate the diameter of the worm wheel (200). The diameter of the worm grinding wheel (200) The calculation method is as follows ; According to the diameter of the worm grinding wheel (200) Grinding wheel normal module Number of grinding wheel heads Grinding wheel tooth tip height Calculate the helix angle of the worm wheel (200). The helix angle of the worm grinding wheel (200) The calculation method is as follows ; The axis of the worm gear grinding wheel (200) is deflected to an angle with the axis of the roller (100) of . The worm wheel (200) is moved so that the extension direction of the tooth groove (300) on the worm wheel (200) is parallel to the radial direction of the roller (100). The worm wheel (200) is moved so that the roller (100) is located in the tooth groove (300). The current center position of the tooth groove (300) of the worm wheel (200) is measured. Move the worm wheel (200) so that the roller (100) is located at the current center position of the tooth groove (300), and measure the depth of the tooth groove (300) of the worm wheel (200).

2. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 1, characterized in that: Moving the worm wheel (200) until it contacts the roller (100) includes: Rotate the roller (100) and the worm wheel (200), and move the worm wheel (200) closer to the roller (100) while using an AE acoustic emission sensor to detect whether the roller (100) is in contact with the worm wheel (200).

3. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 1, characterized in that: Moving the worm wheel (200) to position the roller (100) within the tooth groove (300) includes: Stop the worm wheel (200) from rotating and drive the roller (100) to rotate; Move the worm wheel (200) to the coordinate value on the x-axis. Place, As a preset value, if the worm wheel (200) moves to the x-axis coordinate value During the process, the AE acoustic emission sensor detects a contact sound signal, then moves the worm wheel (200) away from the roller (100), then drives the worm wheel (200) to rotate by a specified angle, and then drives the worm wheel (200) to move along the x-axis coordinate value. The worm wheel (200) moves until it reaches the coordinate value on the x-axis. At the location, and the AE acoustic emission sensor did not detect any contact sound signal; Then record the rotation angle of the worm wheel (200) at that time.

4. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 1, characterized in that: Measuring the current center position of the tooth groove (300) of the worm grinding wheel (200) includes: moving the worm grinding wheel (200) axially, using an AE acoustic emission sensor to detect whether the roller (100) is in contact with the current side wall of the tooth groove (300) of the worm grinding wheel (200), and recording the coordinate values ​​on the y-axis of the worm grinding wheel (200) when the two side walls of the current tooth groove (300) of the worm grinding wheel (200) are in contact with the roller (100). and Calculate the current center position of the tooth groove (300) of the worm grinding wheel (200). P y .

5. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 1, characterized in that: Measuring the depth of the tooth groove (300) on the worm grinding wheel (200) includes: Move the worm wheel (200) toward the roller (100) and record the coordinate value on the x-axis of the worm wheel (200) when the AE acoustic emission sensor detects the contact sound signal. Calculate the depth of the tooth groove (300).

6. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 5, characterized in that: The edge dimension of the roller (100) is smaller than the dimension of the bottom of the tooth groove (300) on the worm wheel (200).

7. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 6, characterized in that: The thickness of the edge of the roller (100) is less than the thickness of the center of the roller (100).

8. The automatic measurement method for key parameters of the grinding wheel on a worm gear grinding machine according to claim 7, characterized in that: Both the roller (100) and the worm wheel (200) are driven to rotate by an electric motor.

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