Frame forming structure for use with frame and sash of aluminium-wood combined door/window

A frame and sash forming structure of an aluminium-wood combined door and window, comprising at least a frame for door and window or a sash frame for door and window, wherein the frame for door and window or the sash frame for door and window is formed by two connecting adjacent profile frame strips by means of an angle forming device and a round tenon rod on adjacent connecting end surfaces of the connecting adjacent profile frame strips;

• the connecting end surfaces of two adjacent profile frame strips are processed to have a section at an angle of 0-60° with respect to an end plane of a normal profile frame strip respectively, and are interconnected to form a perpendicular frame edge;
• symmetric U-shaped notches for positioning the angle forming device and symmetric round tenon rod holes are processed on the connecting end surfaces of the two adjacent profile frame strips, respectively;
• the round tenon rod, which is used for positioning, is inserted into the symmetric round tenon rod holes;
• when the two adjacent profile frame strips are mutually spliced, a space which accommodates the angle forming device is formed at a splicing location;
• the angle forming device is formed by combining two halves of the angle forming device, and each half of the two halves of the angle forming device is fixed in each of the corresponding U-shaped notches of the adjacent profile frame strips with a bolt;
• and the two halves of the angle forming device are mechanically tightened by means of a mechanism comprising a pair of meshed bevel gear, to fix and connect the two adjacent profile frame strips.