Attune of numerical control reinforcing steel bar cuts off machine length to detect continuously reach cut off control

5% , overcame original equipment to cannot be used at attune of small diameter reinforcing steel bar to reach the issue that cut off continuously. This device has automatic length to detect, stage of the knife below automatic and synchronous shift, cut off number of root of reinforcing steel bar to write down the function such as number automatically. Attune of 1 reinforcing steel bar works with what cut continuously the principle pursues 1 cut off the graph of mechanical drive principle of machine continuously for attune of reinforcing steel bar. By the reinforcing steel bar with straight attune 1 in feeding roller 2 with drawing roller the drives next is in to rotate tone straight canister of 4 3 in tone is straight. On the by of reinforcing steel bar after tone is straight, the port of stage leaving a sword moves ahead. The front of reinforcing steel bar after tone is straight did not move to block iron when 7 positions, peen 8 although be in flying wheel of 9 drive dirty fluctuation reciprocate, but as a result of not stage of the knife on bring into contact with 10, so reinforcing steel bar was not cut. The front of reinforcing steel bar after tone is straight supports to block iron 7 when, through pull rod 6 make go up knife stage 10, stage leaving a sword 5 forward shift. Right now, the peen of reciprocate 8 will pass fluctuation knife stage to be cut to reinforcing steel bar (length of cut reinforcing steel bar is L) , the shift that finishs a reinforcing steel bar is mixed continuously cut. Move continuously, can finish attune of successive reinforcing steel bar to be mixed continuously cut. Of length of 2 reinforcing steel bar detect attune of reinforcing steel bar cuts off mechanic to make an environment continuously abominable, the vibration when the machine works is bigger. Detecting when dimension of reinforcing steel bar, besides making sure precision asks, still must satisfy interference rejection ability strong, job reliable, service life is long wait for a requirement. Attune of existing reinforcing steel bar cuts off the dimension of machine to detect continuously use contact to measure, it is namely when reinforcing steel bar is mobile, drive stretch friction pulley to turn. Friction pulley joins with pulse generator again, calculate length of reinforcing steel bar by the estimation noting number of pulse generator. Itself of the machine when because cut off mechanic continuously in tone,be being made and vibration of reinforcing steel bar are very intense, of friction pulley wear away extremely serious, if nonsked change detect friction pulley, detect the influence precision, cause cut off an error. Be based on above reason, length of reinforcing steel bar detects the method that must use blame contact to detect. Compare through the experiment, use alternant on reinforcing steel bar ground to bring to bear on the plan of magnetism signal is more feasible, achieved design requirement. Graph 2 for reinforcing steel bar length detects and reinforcing steel bar cuts off graph of principle of job of pilot electric equipment. Control parameter inputs sheet by clavier piece machine, parameter of digital canal indication setting and machine run state (contain cut reinforcing steel bar to count) . To realize blame contact length of reinforcing steel bar detects, found a place for in the exit of knife stage excitation magnetic head is mixed read signal extraction magnetism to realize blame contact to detect. The job in the begining, odd a machine in P1.

0 port output tall n, drive excitation amplifier, the electricity that excitation amplifier exports produces magnetic field on excitation magnetic head. The reinforcing steel bar after this magnetic field makes tone straight is to contain the magnetism signal of S polarity by magnetization, when the reinforcing steel bar that contains magnetism number motion arrives when position of the magnetic head that read magnetism, inductive pulse tension produces on the magnetic head that read magnetism, sheet is inputted after amplifier of classics of pulse voltage signal magnifies piece the P3 of machine.

0 port. When sheet piece machine detect P3.

After 0 port are tall n, p1.

0 port output low n. Namely the voltaic direction of magnetic head of excitation amplifier change, make reinforcing steel bar is to contain polarity to be signal of N pole magnetism by magnetization. Such, the reinforcing steel bar that the magnetic head that read magnetism detects magnetizes direction to change, the polarity of excitation magnetic head also is changed accordingly, and tally is added automatically one, move ahead as reinforcing steel bar, the continuous magnetization signal that contains magnetic pole sex to be changed alternately on reinforcing steel bar, a kind of polarity magnetizes the length of area to be excitation magnetic head and the distance between the magnetic head that read magnetism. Can calculate by the graph length is a reinforcing steel bar that cut off: L= (N+1) B-A (1) the N in type -- B of tally numerical value -- excitation magnetic head and the distance A of the magnetic head that read magnetism -- the distance A of the distance knife head of knife head and excitation magnetic head and excitation magnetic head is fixed, the distance B basis of the magnetic head that read magnetism and excitation magnetic head of reinforcing steel bar cut length to undertake adjustment. Speed of 3 knives stage dogs reach reinforcing steel bar to cut control principle to become odd an aircraft through type (1) when the reinforcing steel bar after computational attune is straight arrives at formulary length, need to make pull rod is pulled move on, stage leaving a sword moves. Existing numerical control reinforcing steel bar moves straight machine to use the suction of electro-magnet to add up to a movement to make pull rod moves. Use this kind of method to put in two characteristics: (1) move when reinforcing steel bar rate is higher, and when the reinforcing steel bar that need cuts is shorter, electro-magnet needs to be sucked often close, coil gives out heat extremely easily and burn down electro-magnet. (2) peen position is not firm, cause cut off out of tolerance of length of reinforcing steel bar. Accordingly, the motion that cannot introduce electro-magnet controls knife stage shift. The pace has fixed position precision into electric machinery tall, rotate speed is controlled easily wait for an advantage. If use the pace of successive roll to enter the flexibility on electric machinery take-off to unplug lever drives speed to keep identical, the length that can assure to need accurately by place cuts reinforcing steel bar. Graph 3 pursue for transmission principle. Peen drives fluctuation to move by flying wheel. When reinforcing steel bar mobile distance is achieved when cutting size, peen is not leaving ultimate position certainly; If make speed of knife stage shift and rate of shift of reinforcing steel bar same (be equivalent to knife stage holding reinforcing steel bar in arms to move) , cut reinforcing steel bar again when peen is in next ultimate positions, can assure to cut reinforcing steel bar accurately. Set inside a cycle that peen moves, the S of the largest space of pull rod is contented: CNC Milling