Equipment and methods for correcting wear of centerless grinding wheels

Abstract

This invention relates to a centerless grinding wheel wear correction device, comprising a worktable on which a centerless grinding machine is mounted. The centerless grinding machine includes a grinding wheel and a guide wheel coaxially arranged on the grinding wheel. A support for placing a workpiece is provided between the grinding wheel and the guide wheel. The workpiece can be placed on the support along the axial direction of the grinding wheel. Both the grinding wheel and the guide wheel can reciprocate toward the workpiece. A laser rangefinder, moving synchronously with the grinding wheel, is provided on one side of the grinding wheel. The distance between the measuring head of the laser rangefinder and the axis of the grinding wheel remains constant. This invention features the ability to correct its own position in real time during the grinding process, maintaining close proximity to the workpiece during grinding, ensuring grinding accuracy, and ensuring accurate detection of the grinding wheel position.

Description

Technical Field

[0001] This invention relates to a device and method for correcting wear on a centerless grinding wheel, belonging to the technical field of centerless grinding. Background Technology

[0002] A centerless grinder is a type of grinding machine that does not require the workpiece to be positioned by an axis for grinding. It is a type of grinding wheel and mainly consists of three mechanisms: a grinding wheel, an adjusting wheel, and a workpiece support. The grinding wheel is responsible for the actual grinding work, the adjusting wheel controls the rotation of the workpiece and the feed rate of the workpiece, and the workpiece support supports the workpiece during grinding. Centerless grinders are often used to process the outer diameter of cylindrical workpieces. However, centerless grinders are mostly used for mass production, and long-term production will lead to wear of the grinding wheel.

[0003] Chinese patent application CN112589553A discloses a centerless grinder for automatically correcting grinding wheel wear, including a housing, a working chamber inside the housing, a placement opening for placing a piston through the inner wall of the working chamber, a material discharge chamber with an upward opening on the bottom wall of the working chamber, and a screening mechanism for screening qualified and unqualified products inside the material discharge chamber.

[0004] The aforementioned centerless grinder detects the wear of the grinding wheel by measuring the outer diameter of the workpiece after grinding, and then corrects the grinding wheel feed rate based on the wear. However, the grinding wheel is continuously worn during the grinding process. If the grinding wheel feed rate is corrected based on the outer diameter of the workpiece after grinding, it is impossible to achieve accurate grinding of the workpiece in a timely manner. Grinding errors due to grinding wheel wear are present, which can easily lead to more defective workpieces. Summary of the Invention

[0005] The purpose of this invention is to provide a centerless grinding wheel wear correction device and correction method, which solves the problems of grinding errors on workpieces caused by grinding wheel wear in the prior art.

[0006] The above-mentioned technical objective of this invention is mainly achieved through the following technical solution: a centerless grinding wheel wear correction device, comprising a worktable, on which a centerless grinding machine is provided, the centerless grinding machine including a grinding wheel and a guide wheel coaxially arranged on the grinding wheel, a bracket for placing a workpiece is provided between the grinding wheel and the guide wheel, the workpiece can be placed on the bracket along the axial direction of the grinding wheel, both the grinding wheel and the guide wheel can reciprocate toward the workpiece, a laser rangefinder is provided on one side of the grinding wheel that moves synchronously with the grinding wheel, the measuring head of the laser rangefinder is in contact with the grinding wheel... The distance between the wheel shafts remains constant. Both the grinding wheel and the guide wheel can move towards the workpiece to perform grinding. The laser rangefinder can detect the wear of the grinding wheel in real time, allowing the grinding wheel to correct its position in real time during the grinding process, maintaining close proximity to the workpiece and ensuring grinding accuracy. The distance between the laser rangefinder's measuring head and the grinding wheel shaft remains constant to ensure consistency between the measuring head and the grinding wheel shaft, thus guaranteeing the accuracy of the laser rangefinder's detection even with continuous wear of the grinding wheel.

[0007] Preferably, the measuring head of the laser rangefinder is oriented in the same direction as the radius of the grinding wheel. This orientation allows the laser to directly strike the sidewall and axis of the grinding wheel, enabling more direct detection of grinding wheel wear. This reduces the steps of data conversion and calculation, making the detection of grinding wheel wear more efficient.

[0008] Preferably, the grinding wheel has a housing on its periphery, and a support column is provided on the rear side of the housing. The laser rangefinder is fixed to the top of the support column, and the measuring head of the laser rangefinder is set downward toward the side wall of the grinding wheel. The laser rangefinder is located above the grinding wheel, which can avoid interfering with the grinding operation of the grinding wheel. At the same time, it can move synchronously with the grinding wheel through the connection of the support column to ensure synchronous movement with the grinding wheel.

[0009] Preferably, the top of the support column is provided with a drive cylinder arranged along the moving direction of the grinding wheel, and the output end of the drive cylinder is connected to the laser rangefinder; the arrangement of the drive cylinder allows the laser rangefinder to finely adjust its position, so that the measuring head of the laser rangefinder is aligned with and accurately aligned with the radial direction of the grinding wheel, thereby ensuring measurement accuracy.

[0010] Preferably, the support has a slot located between the grinding wheel and the guide wheel, and the two ends of the slot are respectively provided with a first fixing part and a second fixing part for fixing the two ends of the workpiece. The slot is provided so that the grinding wheel and the guide wheel face the workpiece and contact the workpiece to realize normal grinding work, while the first fixing part and the second fixing part can support the two ends of the workpiece, so that the workpiece is located at the slot and it is convenient to perform grinding.

[0011] Preferably, the worktable is provided with a first transverse drive mechanism for driving the grinding wheel to move toward the workpiece and a second transverse drive mechanism for driving the guide wheel to move toward the workpiece. The arrangement of the first and second transverse drive mechanisms allows the grinding wheel and the guide wheel to move independently toward the workpiece through the drive of the first and second transverse drive mechanisms, thereby realizing the grinding operation. Furthermore, the position of the grinding wheel can be corrected in real time according to the detection of the laser rangefinder by the control of the first transverse drive mechanism, so as to maintain the grinding process on the workpiece.

[0012] As a preferred embodiment, the correction method for the wear correction device of the centerless grinding wheel includes the following steps:

[0013] S1. Place the workpiece to be ground on the support;

[0014] S2. Start the laser rangefinder and adjust the relative position between the laser rangefinder and the grinding wheel;

[0015] S3. Start the grinding wheel and guide wheel;

[0016] S4. Control the grinding wheel and guide wheel to move toward the workpiece to be ground and grind the workpiece;

[0017] S5. The laser rangefinder detects the wear of the grinding wheel, and the grinding wheel corrects its position in real time according to the wear.

[0018] The above-mentioned correction method allows the wear of the grinding wheel to be detected in real time by a laser rangefinder, and the position of the grinding wheel can be corrected in real time according to the wear of the grinding wheel, so as to maintain the grinding state of the grinding wheel on the workpiece to be ground, thereby reducing the detection error of the grinding wheel wear and ensuring the accuracy of the correction of the grinding wheel position.

[0019] Therefore, the present invention has the characteristics of being able to correct its own position in real time during the grinding process of the workpiece, maintaining close proximity to the workpiece during grinding, ensuring the grinding accuracy of the workpiece, and ensuring the detection accuracy of the grinding wheel position. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, a centerless grinding wheel wear correction device includes a worktable 1, on which a centerless grinder a is provided. The centerless grinder a includes a grinding wheel 21 and a guide wheel 22 coaxially arranged on the grinding wheel 21. A bracket 23 for placing workpieces is provided between the grinding wheel 21 and the guide wheel 22. Workpieces can be placed on the bracket 23 along the axial direction of the grinding wheel 21. Both the grinding wheel 21 and the guide wheel 22 can reciprocate toward the workpiece. A laser rangefinder 3 that moves synchronously with the grinding wheel 21 is provided on one side of the grinding wheel 21. The distance between the measuring head of the laser rangefinder 3 and the axis of the grinding wheel 21 remains unchanged. The measuring head of the laser rangefinder 3 is oriented in the same direction as the radius of the grinding wheel 21. A slot 231 is provided on the bracket 23 at the position between the grinding wheel 21 and the guide wheel 22. A first fixing part 232 and a second fixing part 233 for fixing the two ends of the workpiece are respectively provided at both ends of the slot 231.

[0023] The aforementioned support is connected to an external feeding device. The workpiece to be ground can be automatically moved onto the support along the axial direction. When the two ends of the workpiece are respectively located on the first fixed part and the second fixed part, the middle part of the workpiece is located at the slot. At this time, the grinding wheel and the guide wheel are respectively located on both sides of the outer circle of the workpiece. After the grinding wheel and the guide wheel are started, the grinding wheel and the guide wheel move towards the outer circle side wall of the workpiece at the same time. The grinding wheel grinds the outer circle of the workpiece, while the guide wheel drives the workpiece to rotate during the grinding process, so that the workpiece is ground while rotating. During the grinding process, the laser rangefinder detects the wear degree of the side wall of the grinding wheel in real time to correct the position of the grinding wheel in an instant.

[0024] A housing 24 is provided around the periphery of the grinding wheel 21, and a support column 241 is provided on the rear side of the housing 24. A laser rangefinder 3 is fixed to the top of the support column 241, with its measuring head pointing downwards towards the side wall of the grinding wheel 21. A drive cylinder 25 is provided at the top of the support column 241, and the output end of the drive cylinder 25 is connected to the laser rangefinder 3. The aforementioned laser rangefinder and drive cylinder are currently available products on the market and represent existing technology; therefore, they will not be described in detail here. After the laser beam emitted by the laser rangefinder is emitted, it can travel in a straight line... Extending to the axis of the grinding wheel, when the grinding wheel is grinding the workpiece, the laser emitted by the laser rangefinder directly hits the side wall of the grinding wheel and returns to the laser rangefinder. When the grinding wheel wears down, the laser length of the laser rangefinder increases. At this time, the laser rangefinder can convert the laser length change data into the lateral movement data of the grinding wheel, and control the grinding wheel to always be in contact with the workpiece in real time to grind the workpiece. Thus, the relative position of the grinding wheel and the workpiece can be corrected in real time according to the amount of wear of the grinding wheel.

[0025] The worktable 1 is equipped with a first transverse drive mechanism b for driving the grinding wheel 21 to move toward the workpiece and a second transverse drive mechanism c for driving the guide wheel 22 to move toward the workpiece. The first transverse drive mechanism and the second transverse drive mechanism can both adopt a structure of motor and lead screw, or a structure of rodless cylinder, to control the grinding wheel and the guide wheel to move toward the outer side wall of the workpiece respectively. When the first transverse drive mechanism controls the grinding wheel to move, the laser rangefinder moves synchronously with the grinding wheel.

[0026] The correction method for wear correction equipment of centerless grinding wheels includes the following steps:

[0027] S1. Place the workpiece to be ground on the support;

[0028] S2. Start the laser rangefinder and adjust the relative position between the laser rangefinder and the grinding wheel;

[0029] S3. Start the grinding wheel and guide wheel;

[0030] S4. Control the grinding wheel and guide wheel to move toward the workpiece to be ground and grind the workpiece;

[0031] S5. The laser rangefinder detects the wear of the grinding wheel, and the grinding wheel corrects its position in real time based on the wear.

[0032] The workpiece is moved to the slot on the support under the control of an external feeding device. The grinding wheel and guide wheel are located on both sides of the outer circle of the workpiece. The relative position between the laser rangefinder and the grinding wheel is adjusted and the laser rangefinder is activated. Then the grinding wheel and guide wheel are activated, controlling the grinding wheel to move towards one side of the workpiece and the guide wheel to move towards the other side of the workpiece, until the grinding wheel and guide wheel contact both sides of the workpiece, thus starting the grinding process. The laser rangefinder detects the wear of the grinding wheel in real time, so as to transmit signals at any time and control the first transverse drive mechanism to automatically drive the grinding wheel to move in real time, correct the position of the grinding wheel, and keep the grinding wheel in the grinding state of the workpiece at all times.

Claims

1. A correction method for a centerless grinding wheel wear correction device, characterized in that: The centerless grinding wheel wear correction device includes a worktable (1), on which a centerless grinding machine (a) is provided. The centerless grinding machine (a) includes a grinding wheel (21) and a guide wheel (22) arranged coaxially with the grinding wheel (21). A bracket (23) for placing workpieces is provided between the grinding wheel (21) and the guide wheel (22). Workpieces can be placed on the bracket (23) along the axial direction of the grinding wheel (21). Both the grinding wheel (21) and the guide wheel (22) can reciprocate toward the workpiece. A laser rangefinder (3) that moves synchronously with the grinding wheel (21) is provided on one side of the grinding wheel (21). The distance between the measuring head of the laser rangefinder (3) and the axis of the grinding wheel (21) remains unchanged. The measuring head of the laser rangefinder (3) is oriented in the same direction as the radius of the grinding wheel (21); a housing (24) is provided on the periphery of the grinding wheel (21), and a support column (241) is provided on the rear side of the housing (24). The laser rangefinder (3) is fixed on the top of the support column (241), and the measuring head of the laser rangefinder (3) is set downward toward the side wall of the grinding wheel (21); a drive cylinder (25) is provided on the top of the support column (241) along the moving direction of the grinding wheel (21), and the output end of the drive cylinder (25) is connected to the laser rangefinder (3). The method includes the following steps: S1. Place the workpiece to be ground on the support; S2. Start the laser rangefinder and adjust the relative position between the laser rangefinder and the grinding wheel; S3. Start the grinding wheel and guide wheel; S4. Control the grinding wheel and guide wheel to move toward the workpiece to be ground and grind the workpiece; S5. The laser rangefinder detects the wear of the grinding wheel, and the grinding wheel corrects its position in real time based on the wear.

2. The correction method according to claim 1, characterized in that: The bracket (23) has a slot (231) located between the grinding wheel (21) and the guide wheel (22). The two ends of the slot (231) are respectively provided with a first fixing part (232) and a second fixing part (233) for fixing the two ends of the workpiece.

3. The correction method according to claim 1, characterized in that: The worktable (1) is provided with a first transverse drive mechanism (b) for driving the grinding wheel (21) to move toward the workpiece and a second transverse drive mechanism (c) for driving the guide wheel (22) to move toward the workpiece.

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