Visual capture numerical control machine tool coordinate positioning method

Abstract

The invention relates to a machining technology and method of a numerical control electric spark forming machine tool, in particular to a method for recognizing the contour of a workpiece through a visual capture system, and then obtaining the coordinates of the center point of the surface of the workpiece placed irregularly through data analysis of a system control cabinet, and the method comprises a machine tool body mechanism, the system control cabinet and the visual capture system. The machine tool main body mechanism comprises a machine tool stand column, a machine tool main shaft, a machine tool workbench and a working liquid tank, the visual capturing system comprises a visual capturing device and a visual capturing data analysis device, the visual capturing system is used for rapidly recognizing surface profiles of a plurality of workpieces which are irregularly placed and obtaining surface center point coordinates, and according to the obtained coordinate positions, the surface center point coordinates of the workpieces are obtained. The machine tool runs a program, the reference ball is used for confirming and compensating the actual coordinate position of the center point of the surface of each workpiece one by one so as to ensure the machining precision of the workpieces, and the method has a remarkable progressive effect on improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the field of machining technology and method of CNC electric spark forming machine tools and wire cutting machine tools, and in particular to a method for visually capturing coordinate positioning of CNC machine tools. Background Art

[0002] In actual processing, we often face the situation where multiple quantities of the same workpiece are required. Due to the particularity of CNC EDM forming machines, if only one workpiece is placed on the workbench, the production efficiency will become very low. Therefore, when users need to place multiple identical workpieces on the CNC EDM forming machine, they can only place them manually in the approximate position of the workbench, and the position distance between the workpieces cannot be accurately obtained. The product size requirements are very high, so the accurate establishment of the coordinate system of each workpiece plays a decisive role.

[0003] The current method is to place the reference ball on the spindle and place multiple workpieces in sequence. By visual inspection, move the reference ball above a single workpiece, run the machine tool program, and the machine tool will automatically run to find the center point of the workpiece surface. After the coordinate position is determined, the machine tool will automatically record the coordinates of the center point of the current workpiece surface. This process is repeated until the origin of the coordinate system of all workpieces on the workbench is found.

[0004] This conventional method can only visually estimate the center point when manually moving the reference ball to the workpiece surface. When the reference ball and the workpiece surface center point are far apart, the machine tool may give an alarm and fail to find the workpiece surface center point. Therefore, relying solely on visual inspection has a relatively large disadvantage in actual operation, and cannot guarantee the stability of each operation, and the production efficiency is also low. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of the existing operation method, a method for visually capturing the coordinate positioning of a CNC machine tool is provided.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a method for visual capture of CNC machine tool coordinate positioning, including a machine tool main body structure, a system control cabinet, and a visual capture system. The visual capture system includes a visual capturer, visual capture data analysis, and a data analysis and processing system module that is compatible with the system control cabinet.

[0007] The main structure of the machine tool includes a machine tool column, a machine tool spindle, a working fluid tank and a worktable. The machine tool spindle and the worktable are the machine tool hardware. The machine tool spindle is assembled on the machine tool column, the visual capture device is installed on one side of the column, and the working fluid tank is assembled on the worktable, providing environmental support for processing.

[0008] The system control cabinet includes a machine tool motion control module, an electrical discharge machining module, and a visual capture system module. The machine tool motion control module includes a servo system, a ball screw, a guide rail, a bearing, and a casting, and supports translation of the X, Y, and Z axes. The electrical discharge machining module includes a process database, a circuit board, and a discharge circuit.

[0009] The reference ball is mounted on the main spindle of the machine tool and is used to touch the surface of the workpiece to obtain the coordinate position of the actual surface center point.

[0010] The operation panel is installed on the system control cabinet and is used for the operator to select the next operation.

[0011] Preferably, in order to improve the accuracy of the workpiece coordinate data, the reference ball is made of tungsten steel ball.

[0012] Preferably, in order to improve the visual capture accuracy, a high-pixel visual capture device is selected.

[0013] Preferably, in order to improve operation accuracy, the operation panel adopts an infrared touch screen.

[0014] The beneficial effect of the present invention is that the outline of irregularly placed workpieces is captured by a visual capture device, and the coordinates of the center point of each workpiece surface are obtained by data analysis. The results are displayed on the operation panel. The user can follow the order of automatic arrangement of the system or define the order of the workpieces independently. The system control cabinet automatically executes the program according to the order of the workpieces, touches each workpiece surface, confirms and corrects the actual coordinate position of each workpiece surface. Compared with the existing processes and methods, the skill requirements for users are reduced, and the operation time for determining the approximate surface center point position of each workpiece is shortened, which has a significant progressive effect on improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a schematic diagram of the overall structure of the front side of the present invention;

[0017] Figure 2 Schematic diagram of the three-dimensional overall structure of the present invention

[0018] In the figure: 1. Machine tool column; 2. Machine tool spindle; 3. System control cabinet; 4. Operation panel; 5. Working fluid tank; 6. Workbench; 7. Vision capturer; 8. Reference ball; 9. Workpiece. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the use environment and operation method of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0020] like Figure 1 As shown, the mechanical part is placed on the left and the system control cabinet is placed on the right. The hardware and software are combined into a machine tool. The mechanical part includes a machine tool column 1, a machine tool spindle 2, a working fluid tank 5, a workbench 6, a visual capture device 7, a reference ball 8, and a workpiece 9. The operation panel 4 is included in the system control cabinet 3.

[0021] like Figure 2 As shown, a method for visually capturing the coordinate positioning of a CNC machine tool is shown, wherein the machine tool spindle 2 is installed on the machine tool column 1, and a Z-axis moving body is formed by a combination of ball screw, guide rail, bearing, and servo motor components. The workbench 6 forms X-axis and Y-axis moving bodies through a casting matrix, a ball screw, a guide rail, a bearing, and a servo motor. The visual capture device 7 is installed on one side of the machine tool column 1 to identify the contours of multiple workpieces 9 irregularly placed on the workbench 6. The data is analyzed and processed by the system control cabinet 3 to obtain the approximate coordinate position of the center point of the surface of the workpiece 9, and the data results are displayed on the operation panel 4. The operator can specify the order of execution of the next program according to the actual situation. The system control cabinet issues program instructions, and the reference ball 8 touches each workpiece 9 in sequence. The actual coordinate data of the center point of the surface of each workpiece 9 is obtained through data processing by the system control cabinet 3, which provides a strong guarantee for the processing accuracy of each workpiece 9.

[0022] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and method of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for visually capturing coordinate positioning of a CNC machine tool, characterized in that: The machine tool spindle (2) is mounted on the machine tool column (1), and a Z-axis moving body is formed by a combination of ball screw, guide rail, bearing, and servo motor components. The workbench (6) is formed by a casting base, a ball screw, a guide rail, a bearing, and a servo motor to form an X-axis and a Y-axis moving body. The visual capture device (7) is mounted on one side of the machine tool column (1) to identify the contours of a plurality of workpieces (9) irregularly placed on the workbench (6). The data is analyzed and processed by a system control cabinet (3) to obtain the approximate coordinate position of the center point of the surface of the workpiece (9), and the data result is displayed on an operation panel (4). The operator can specify the sequence of the next program execution according to the actual situation. The system control cabinet (3) issues program instructions, and the reference ball (8) touches each workpiece (9) in sequence. The actual coordinate data of the center point of the surface of each workpiece (9) is obtained through data processing by the system control cabinet (3).

2. The method for visually capturing the coordinate positioning of a CNC machine tool according to claim 1, characterized in that: The system control cabinet (2) is responsible for the motion function of the machine tool and the data analysis and processing of the visual capture device (7), and the operation panel (4) is used to specify the selection of operation steps.

3. The method for visually capturing coordinate positioning of a CNC machine tool according to claim 1, characterized in that: The method is applicable to the field of electrical discharge machining machine tools, and is not limited to CNC electrical discharge forming machine tools and wire cutting machine tools. Wire cutting machine tools.

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