Electronic control power spindle for error compensation of regular polygon turning

Abstract

The utility model discloses a regular polygon turning error compensation electric control power spindle which comprises a servo motor support, a servo motor, a power cutter head, a micro-motion cutter device, a power source pipe and a power source pipe support. The power cutterhead and the workpiece spindle rotate in the same direction at a certain rotating speed ratio at the same time to conduct composite turning on a regular polygon, the displacement amount of each linear motor is dynamically set according to an error compensation value, and each linear motor drives a micro-motion cutter device to move by a certain micro displacement in the radial direction of a guide hole of the power cutterhead to conduct turning compensation. The center distance between the tool bit and the axis of a workpiece can be changed in real time when the regular polygon workpiece is machined, so that turning error compensation is completed.

Description

Technical Field

[0001] The utility model relates to a finishing device for turning regular polygonal workpieces, in particular to a power spindle of a linear motor technology for compensating regular polygon turning errors. Background Art

[0002] Regular polygon workpieces are those with regular polygonal cross-sections. Regular polygon workpiece turning primarily involves machining workpieces with square, hexagonal, and octagonal cross-sections. Regular polygon workpieces are widely used in the market. The traditional method for machining regular polygon workpieces is to mill each face of the workpiece using a milling machine. Machining each face requires separate clamping and machining. This milling method is inefficient, and the precision of the multiple face machining steps is low and varies. I have applied for an invention patent for a profile turning and peeling device and method, patent number: ZL201310065947.6. This patented device is functioning normally. This patent primarily relates to equipment and a method for turning regular polygons. This method utilizes the cycloid principle of a planetary gear system, where the tool spindle and workpiece axis are mounted parallel to each other and rotate at a certain speed ratio to form a compound turning motion. The trajectory of the tool tip relative to the workpiece axis is a periodically repeating closed cycloid curve that approximates a straight line. The contour enclosed by the curved trajectory is an approximate regular polygon. Therefore, this method of turning regular polygons is an approximate machining method, and the larger the machining range, the lower the accuracy. To improve the machining accuracy and machining range of regular polygon workpieces, I have applied for a dynamic magnetically controlled spindle and compensation method for regular polygon turning error compensation, patent number: ZL202011645570.8. However, this invention uses two servo motors, which is costly and has complex application conditions, making it difficult to industrialize. In order to reduce development costs and simplify equipment structure, the utility model adopts a linear motor to complete error compensation so that the precision of the regular polygonal workpiece turned meets the requirements. Summary of the Invention

[0003] According to the above problems, the utility model mainly solves the problems of low machining precision, small machining range and high cost in the existing turning of regular polygonal workpieces.

[0004] The utility model provides an electric-controlled power spindle for compensating errors in turning regular polygons, comprising a servo motor bracket, a servo motor, a power cutter disc, a micro-motion tool device, a power tube, and a power tube bracket; the servo motor bracket is bolted to the servo motor; the main shaft of the servo motor is fixedly connected to the power cutter disc; a plurality of guide holes are radially provided on the power cutter disc, which are through holes with square cross-sections, and the guide holes of the power cutter disc are slidably matched with the micro-motion tool device; a plurality of annular electrodes are provided at the front end of the power tube, and the micro-motion tool device is slidably matched with the annular electrodes corresponding to the power tube; the power tube is hollow for passing the power line, and the power tube is fixedly connected to the power tube bracket; a control signal change drives the micro-motion tool device to reciprocate a certain micro-displacement along the radial direction of the guide hole of the power cutter disc, the power cutter disc spindle is installed in parallel with the workpiece spindle, and rotates simultaneously in the same direction at a certain speed ratio to perform error compensation for compound turning;

[0005] The micro-motion tool device includes a positive armature, a negative armature, a signal armature, a fixed frame, a linear motor, a tool body, a guide block, and a tool tip; the positive armature, the negative armature, and the signal armature are respectively connected to the linear motor; each positive armature, the negative armature, and the signal armature are made of elastic wear-resistant materials, and the other ends of the positive armature, the negative armature, and the signal armature are respectively slidably matched with the circular electrodes corresponding to the power tube to ensure continuous power supply and receive control signals, so that each linear motor can be controlled individually, and the displacement of each linear motor changes in real time with the change of the control signal. The linear motor is bolted to the fixed frame, and the other end of the fixed frame is fixedly connected to the power cutter disc. The spindle of the linear motor is fixedly connected to the tool body, and the tool body is fixedly connected to the guide block. The guide block has a square cross-section, and the guide block slides with the guide hole of the power cutter disc. The tool tip is assembled with the guide block. The tool tip is replaced according to the wear condition, and the linear motor drives the tool tip to move radially back and forth a certain micro-displacement according to the control signal.

[0006] Compared with the prior art, the utility model has the following advantages:

[0007] Currently, regular polygon turning methods employ a compound turning motion based on the cycloidal principle of a planetary gear train. The resulting contours approximate regular polygons. Therefore, this machining method is an approximate machining method and can only process regular polygonal workpieces with small cross-sections and low precision. The present utility model provides an electronically controlled power spindle with error compensation for regular polygon turning. This utilizes real-time micro-displacement of a linear motor to improve machining accuracy, reduce machining costs, and simplify the equipment structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a structural diagram of an electrically controlled power spindle for compensating regular polygon turning errors.

[0009] Figure 2 It is a structural schematic diagram of the micro-motion tool device of the present utility model. DETAILED DESCRIPTION

[0010] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following embodiments will be described in detail with reference to the accompanying drawings.

[0011] During the process of studying the technology of turning regular polygons, the technicians of the present invention found that the existing turning of regular polygon workpieces has problems such as low processing accuracy, small processing range, and high cost. In order to solve these problems, the technicians used linear motor real-time micro-displacement technology to perform error compensation to improve processing accuracy.

[0012] Combine Figure 1 、 Figure 2 The utility model provides an electric-controlled power spindle for regular polygon turning error compensation, including a servo motor bracket 1, a servo motor 2, a power cutter disc 3, a micro-tool device 4, a power tube 5, and a power tube bracket 6; the servo motor bracket 1 is bolted to the servo motor 2; the spindle of the servo motor 2 is fixedly connected to the power cutter disc 3; the power cutter disc 3 is radially provided with a plurality of guide holes, which are through holes with a square cross-section, and the guide holes of the power cutter disc 3 are slidably matched with the micro-tool device 4; a plurality of circular electrodes are provided at the front end of the power tube 5, and the micro-tool device 4 is slidably matched with the circular electrodes corresponding to the power tube 5, and the power tube 5 is hollow for passing the power line, and the power tube 5 is fixedly connected to the power tube bracket 6; the control signal change drives the micro-tool device 4 to reciprocate a certain micro-displacement along the radial direction of the guide hole of the power cutter disc 3, and the spindle of the power cutter disc 3 is installed parallel to the spindle of the workpiece, and rotates in the same direction at a certain speed ratio to perform compound turning error compensation.

[0013] The micro-motion tool device 4 includes a positive armature 41, a negative armature 42, a signal armature 43, a fixing frame 44, a linear motor 45, a tool body 46, a guide block 47, and a tool tip 48; the positive armature 41, the negative armature 42, and the signal armature 43 are respectively connected to the linear motor 45; each positive armature 41, the negative armature 42, and the signal armature 43 are made of elastic wear-resistant material, and the other ends of the positive armature 41, the negative armature 42, and the signal armature 43 are respectively slidably matched with the circular electrodes corresponding to the power supply tube 5 to ensure continuous power supply and receive control signals, thereby realizing that each linear motor 45 can Individual control ensures that the displacement of each linear motor 45 changes in real time with the change of the control signal. The linear motor 45 is bolted to the fixed frame 44, and the other end of the fixed frame 44 is fixedly connected to the power cutter disc 3. The main shaft of the linear motor 45 is fixedly connected to the cutter body 46, and the cutter body 46 is fixedly connected to the guide block 47. The guide block 47 has a square cross-section, and the guide block 47 slides with the guide hole of the power cutter disc 3. The tool tip 48 is assembled with the guide block 47. The tool tip 48 is replaced according to the wear condition. The linear motor 45 drives the tool tip 48 to move radially back and forth a certain micro-displacement according to the control signal.

Claims

1. An electronically controlled power spindle for regular polygon turning error compensation, characterized by: Servo motor bracket, servo motor, power cutter disc, micro-tool device, power tube, power tube bracket; the servo motor bracket is bolted to the servo motor; the main shaft of the servo motor is fixedly connected to the power cutter disc; the power cutter disc is radially provided with a plurality of guide holes, which are through holes with a square cross-section, and the power cutter disc guide holes are slidably matched with the micro-tool device; a plurality of annular electrodes are provided at the front end of the power tube, and the micro-tool device is slidably matched with the annular electrodes corresponding to the power tube, the power tube is hollow for passing the power line, and the power tube is fixedly connected to the power tube bracket; the control signal changes to drive the micro-tool device to reciprocate radially along the guide hole of the power cutter disc for a certain micro-displacement, the power cutter disc spindle is installed parallel to the workpiece spindle, and rotates in the same direction at a certain speed ratio to perform error compensation for compound turning; The micro-motion tool device includes a positive armature, a negative armature, a signal armature, a fixed frame, a linear motor, a tool body, a guide block, and a tool tip; the positive armature, the negative armature, and the signal armature are respectively connected to the linear motor, and each positive armature, the negative armature, and the signal armature are made of elastic wear-resistant materials. The other ends of the positive armature, the negative armature, and the signal armature are respectively slidably matched with the circular electrodes corresponding to the power tube to ensure continuous power supply and receive control signals, so that each linear motor can be controlled individually, and the displacement of each linear motor changes in real time with the change of the control signal. The linear motor is bolted to the fixed frame, and the other end of the fixed frame is fixedly connected to the power cutter disc. The main shaft of the linear motor is fixedly connected to the tool body, and the tool body is fixedly connected to the guide block. The guide block has a square cross-section and slides with the guide hole of the power cutter disc. The tool tip is assembled with the guide block. The tool tip is replaced according to the wear condition. The linear motor drives the tool tip to radially reciprocate for a certain micro-displacement according to the control signal.

Images