SU108564A1 - Way to cut lumber - Google Patents

Description

A known method of cutting lumber along the length with preliminary marking consists in the fact that the braker, after the dissolution of the log, finely marks the trimming boards. In this case, the trimmer manually moves the board along the roller table, combining the mark of the braker with the plane of the miter saw, and then produces a cut /

The described method solves the task of automating the cutting by pre-marking the cut-out lumber with a special pencil or paint containing ferromagnetic powder acting on an inductive sensor controlling the actuators of the saw machine. For this, an inductive sensor is installed above the moving board to be removed. When the board moves, the mark, closing the air gap of the inductive sensor, causes the appearance of a signal on its output, while the voltage at the amplifier input increases, causing the relay and windings to operate, affecting the corresponding board movement mechanisms, as well as the lifting and lowering mechanisms saws.

A device for carrying out the proposed method serves to automatically control a miter machine with pneumatic or hydraulic movement of the saw, pneumatic pressing of the facing material and a roller with pneumatically controlled heads.

These mechanisms are controlled by means of solenoid valves, whereby the coordination of the operation of the pneumatic mechanisms and their interlocking are carried out according to the constructed electric circuit.

The drawing shows a schematic diagram of the device.

The facing 1 board moves in the direction of its axis along the rollerN "Ш8564-2 -

with the help of a roller - “- in-line 2, controlled by a pneumatic cylinder. The device includes a board clamping cylinder 3, a face saw lifting cylinder 4, solenoid valves 5, 6 and 7, an output relay 8 with two normally open contacts, a tube amplifier 9, a bridge with resistances Z |, Z2 and Z, a sensor 10 and limit switches // and 12.

When receiving a pulse from the sensor 10 (approach of the label of the material being cut / under the sensor gap), the relay 8 is activated and self-blocked through its blocking contact and the limit switch contacts //.

The main contact of relay 8 closes the winding circuit of the solenoid valves 5 and b. At the same time, the runner roller 2 rises and at the same time the pressure cylinder 3 is activated, which, after pressing the dock, closes the normally open contact of the limit switch 12, thereby closing the winding circuit of the saw lift solenoid valve 7.

After the endgamer (in the upper position of the saw), the contact of the limit switch 11 is opened, due to which the relay 8 is delocated and the circuit returns to its initial position.

To enable arbitrary sawing of the saw, use the K button, by pressing which, by the sensor, the device can also be activated.

Subject invention

Claims (3)

1. A method of cutting lumber along the length with preliminary marking, characterized in that, for the purpose of automation of cutting, the marking is applied with a composition containing a ferromagnetic powder acting on an inductive sensor controlling the actuators of the saw machine. 2. A device for carrying out the method according to claim 1, characterized in that, in order to control the actuating mechanisms of the saw machine, an inductive sensor that receives a pulse from the marking of ferromagnetic material is included through an amplifier into a relay controlling the electromagnetic valves of the pneumatic cylinders of pressing the board, roller feed board, as well as raising and lowering the saw. 3. In the device according to claim 2 application, limit switches.