Photoelectric feedback type carpentry milling head device with double swing angles

Abstract

The invention provides a photoelectric feedback type carpentry milling head device with double swing angles. The photoelectric feedback type carpentry milling head device with the double swing angles comprises a supporting seat, a main shell, an electric spindle connecting plate, an electric spindle, a shaft C driving mechanism, a shaft A driving mechanism and two rotary photoelectric encoders, wherein the supporting seat is provided with the shaft C driving mechanism which comprises a servo motor and a transmission mechanism, and an output shaft of the shaft C driving mechanism is connected with the main shell; the main shell is provided with the shaft A driving mechanism which comprises a servo motor and a transmission mechanism, and an output shaft of the shaft A driving mechanism is connected with the electric spindle through the electric spindle connecting plate; the shaft C and shaft A driving mechanisms are provided with a travel switch respectively, a positioning block is arranged on a limit belt wheel which is connected to the output shafts of the driving mechanisms, and a corresponding limit switch is arranged on the supporting seat or the main shell; and grating discs in the rotary photoelectric encoders are arranged on the output shafts, and a photoelectric detector and a light source are arranged on the supporting seat or the main shell. The photoelectric feedbacktype carpentry milling head device with the double swing angles can realize polyhedron carving and milling processing during the processing of wood and artificial boards, and is suitable for carpentry high-accuracy and high-speed multi-axle numerically-controlled machine tool.

Description

technical field [0001] The invention belongs to the technical field of deep processing of wood and wood-based panels, and relates to a double-swing angle milling head device that can increase the number of linkage coordinate axes of a woodworking numerical control machine tool and realize polyhedral processing such as engraving, drilling, and sawing in wood processing. technical background [0002] In the modern wood industry, woodworking CNC machine tools are developing in the direction of high speed, high precision, and multi-axis control. At present, woodworking CNC machine tools generally adopt the structural form of three or four coordinate axes linkage. The three-coordinate linkage CNC machine tool can complete the continuous processing of wood workpieces in three coordinate directions. It is impossible to change the angle of the tool rotation axis; the four-coordinate axis linkage CNC machine tool is based on the ordinary three-coordinate axis woodworking CNC machine ...

AI Technical Summary

Problems solved by technology

At present, woodworking CNC machine tools generally adopt the structural form of three or four coordinate axes linkage. The three-coordinate linkage CNC machine tool can complete the continuous processing of wood workpieces in three coordinate directions. It is impossible to change the angle of the tool rotation axis; the four-coordinate axis linkage CNC machine tool is based on the ordinary three-coordinate axis woodworking CNC machine tool. By adding the C-axis functional unit, the electric spindle can rotate around the Z-axis and output the electric spindle. The vertical rotational force is converted into horizontal or other rotational force through the mechanical transmission form of the C-axis functional unit, so as to realize the change of the direction of the coordinate axis

The four-coordinate axis linkage CNC machine tool only adds rotation around one coordinate axis, and the types of processing tools are single, which is difficult to meet the processing requirements of complex curved surfaces of wooden components such as modern furniture, wooden structures and interior decoration.

[0003] At present, the design and manufacture of double-swing angle milling heads for high-precision, high-speed, multi-axis linkage woodworking CNC machine tools in China is still in its infancy. Due to the lack of key technologies, its reliability, quality, and accuracy are difficult to match with foreign products.

In addition, the double-swing angle milling head used for high-precision five-axis linkage machining centers needs to be able to realize the functions of spindle rotation and swing at the same time. At present, the double-swing angle milling head mainly adopts transmission forms such as gear pairs, worm gears, or torque motors. , Worm gear and worm transmission scheme, less electrical connection of the equipment, and lower cost of the whole product, although it can meet a certain motion accuracy requirement, but due to the transmission gap in this type of transmission mode, the positioning accuracy is not high, and it cannot meet more requirements. The requirement of high machining accuracy, if the mechanical facilities to eliminate the transmission gap are added on the basis of it, the transmission structure will be more complicated

In addition, the existing transmission methods have shortcomings such as moment of inertia, elastic deformation, backlash, motion hysteresis, friction, vibration, noise, wear, and high manufacturing and processing requirements; torque motors have high transmission accuracy, but they have low speed, complex control, and production problems. high cost problem

The double-swing angle milling head of the existing five-axis linkage machining center usually adopts an open-loop or semi-open-loop transmission structure, which has disadvantages such as low control accuracy, easy to be disturbed by external impact, and errors cannot be compensated.

[0004] Due to the limitations of the transmission and other aspects of the above-mentioned existing equipment, it cannot adapt to the processing characteristics of fast speed and large vibration and impact in wood processing, resulting in low surface precision of the processed parts, and secondary processing is required to meet the requirements of use. Require

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