DRILLING AND NOTCHING MACHINE TOOL Russian patent published in 1995 - IPC

FIELD: timber working. SUBSTANCE: machine tool has vertical drilling heads 4, connected in pairs by jumpers 5. The heads 4 of each pair are kinematically joined one with another, and they have the same electric motor 10 for driving them to rotation. Each pair of heads 4 is jointly connected with the slide 3, mounted with possibility of motion on horizontal guides 2. The connected pairs of the heads 4 are mutually joined with a movable articulation-joint parallelogram, formed by the tie rods 11, the carrier 14 and the guides 2. That parallelogram is jointly connected with the crank drive mechanism 22, allowing to these heads to perform pendulum oscillations relative to blanks, being worked and secured to the carriage 16, being moved along the vertical guides 15 also with the aid of the crank drive mechanism 17. Both crank drive mechanisms 17, 22 are kinematically joined with the same electric motor 18. A clamping device of each blank is in the form of two parallel strips 24,25. The strip 24 is fixed to one side of the carriage 16; the strip 25 is movable one due to use of springs 26 and roller pushers 27, engaging the formers 28, arranged in parallel with the vertical guides 15 of the carriage 16. EFFECT: enhanced efficiency. 5 cl, 1 dwg