| 摘要 |
<p>1,151,929. Severing. B. R. E. SANDBERG. 23 Aug., 1966 [24 Aug., 1965], No. 37755/66. Heading B3D. A machine for cutting rod or pipe material 9 into pieces of required length comprises means for advancing the material after each cutting operation, electrical means which, subsequent to each advancement of the material, actuate operating means 2 for means 3, 12 for retaining the material and, when the material is clamped securely, actuate operating means for means 5 for cutting the material, the electrical means also returning the cutting means and retaining means, in sequence, under the influence of an electric current passing through the material and retaining means, the circuit for which current is broken by the cutting means when a cutting action has been completed, as well as starting the advancing means for advancing the material one step for cutting the next piece from the material. The advancing means comprises a roller feed which feeds the material on to a guide 10 a distance determined by a step 1. The stop incorporates a switch which controls the operation of a pneumatic piston-andcylinder device 2 connected to one end of a pivoted lever 13, the other end of which carries a pair of clamping members 3, 12 electrically insulated from the lever and connected by cables 15, 16 to a low voltage supply. The cutting means 5 consists of a grinding or cutting disc which is advanced and retracted for a cutting operation by a pneumatic piston-and-cylinder device 4, Fig. 3, the disc advancing to sever the material through a slot in the guide 10 and between the clamping members 3, 12 to interrupt the current flowing through the clamping members and material, the guide 10 being electrically insulated from the machine. The stop member 1 is carried by an arm 17, Fig. 4, which is mounted on a pivot 18 and connected to mechanical components of the machine so that when the members 3, 12 clamp the material, the arm is swung upwardly and a spring urged stub end rests on the material and acts, after severing of a piece of the material, to urge the piece on to a discharge shoot. In operation, the rollers feed the material into engagement with the stop 1 which incorporates a switch in an electric circuit controlling the air supply to the device 2. The members 3, 12 thereby engage the material to clamp it on the guide 10 and make a circuit which actuates the device 4, Fig. 3, for advancing the grinding wheel. When the material is severed and the circuit between the clamping members is interrupted, the cutting disc is retracted, the clamping members raised, and the rollers operated to feed the material to the stop 1 which has urged the previously-severed piece into the discharge shoot.</p> |
