Labour accuses machine and PLC to make medium application in low Die Casting

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  • source:KOMANG CNC Machining
Introduced low Die Casting to build the construction of system of automation system and principle. Be versed in an organic system is formed in accusing machine and Plc to be built in low Die Casting, accuse control of pressure of face of the machine fluid that finish and casting mould temperature by labour (cooling) the demand that controls Die Casting to build, PLC implementation controls systematic control to its. 1 foreword is cast is the craft of figuration of hot-working of a kind of metal with human the earliest control, already had make an appointment with the history 6000, it is the fundamental technology that contemporary machinery makes industry. Casting a process is decide metallic fusion the liquid of the requirement into accord with syncretic and irrigate into casting mould, the cast that books appearance, dimension and function via getting having after cooling and caky, clear whole processing (spare parts or semifinished product) process. The semifinished product cost that casts production is low, the complex to appearance, part that has complex lumen especially, can show its economy more; Its adaptability is wider at the same time, and the integrated and mechanical performance with be had better. Low Die Casting is built is to make liquid metal fills up below pressure action model antrum, in order to form a kind of method of cast. The pressure that uses as a result of place is inferior, be called low Die Casting to build so. Its process is: In sealed crucible (or electric stove) in, connect dry compression air, metallic fluid falls in the action of aeriform pressure, edge stalk rises, enter smoothly through runner model antrum (metal mold) , maintain crucible (or electric stove) inside the aeriform pressure on fluid face, those who pass period of time protect pressure, until till cast is completely caky. Remove next the aeriform pressure on fluid face, make stalk medium not caky metallic current crucible (electric stove) , leave by air cylinder again model roll out cast. Low Die Casting builds distinctive advantage expression to be in the following respects: Liquid metal is filled model smoother; Cast figuration sex is good, be helpful for forming the cast with clear-cut, bright and clean surface, to large the figuration of thin wall cast is more advantageous; Cast organization is compact, mechanical performance is high. The filling that low Die Casting is built is a kind of low intensity of pressure and low rate cast a method, use compress air to regard as fill model motivation, liquid metal is filled model the requirement is smooth; Protect it is good to press a gender, cast figuration sex is good, surface of clear-cut, cast is bright and clean; Sex of requirement mould refrigeration is good, cast organization is compact, mechanical performance is high. 2 low Die Casting make automation system 2.

1 construction of system is versed in the system in accusing machine and Plc to be built in low Die Casting makes the demand that creates to satisfy low Die Casting, dominate industry machine and Plc form an organic system, if pursue,1 is shown. This system is used classification control means. Accuse control of pressure of face of the machine fluid that finish and casting mould temperature by labour (cooling) the demand that controls Die Casting to build. Graph 1 low Die Casting makes automation system 2.

Low Die Casting of 2 systems principle creates machine pressure / if the graph is shown 2 times,the computer of temperature control system controls systematic principle. Graph Nextpage of 2 systems principle (1) pressure control: The pneumatic principle that low Die Casting builds machine pressure to control a system is shown 3 times like the graph, labour accuses machine and by its island of a powerful person of combination of word of logarithm of pattern plate of I/o of pressure of pilot fluid face is undertaken controlling, realized low Die Casting to make pressure control. Labour accuses engine system to use acute pressure sensor and controller of software type Pid, show the set pressure curve that casts a process and curve of effective control pressure at the same time on computer screen, undertake overlay is compared. Show with 4 kinds of color on computer screen 4 measure curve of bit more lukewarm real time temperature. Indicate condition of face of juice of juice of the aluminium inside holding furnace additionally with the graph, in order to remind an operation personnel notices: When fluid of the metal inside furnace little at lowest in a limited time, the system stops pressurization automatically. Graph Y9 of ～ of Y1 of system of 3 pressure control: Control valve (often shut) ; Y11: Into gas advocate a powerful person (often shut) ; Y13: Furnace slow pressure release (often leave) ; Y14: Furnace is all pressure release (often leave) ; Yk1: Pressure switch, monitor " 0 " the force of furnace internal pressure when Mbar. When leaving factory, adjust to make an appointment with 50mbar; Yk2: Pressure switch, monitor force of internal pressure of the biggest furnace, when leaving factory, adjust to make an appointment with 950mbar; B1: Pressure sensor, 0 ～ 1600mbar, 4 ～ 20ma. Detect pressure of the chamber of a stove or furnace; B2: Pressure sensor, 0 ～ 7000mbar, 4 ～ 20ma. Detect pressure of source of gas of air inlet duct. (2) cooling control: Labour accuses machine and by its pilot refrigeration controlled I/o pattern plate controlled 12 (5 wind 7 wind are cold, cold + water-cooling) cooling passageway, can choose arbitrarily a certain number of the passageway works. Cooling to every passageway all was offerred " On " , " Off " , " Auto " way of 3 kinds of works and control by time, control mode two kinds by temperature control. Man-machine interface has cooling picture, but aleatoric switch adjusts electromagnetism a powerful person connect. 2.

3 hardware configure low pressure to control a system to configure as follows: (1) work of type of Panel870 face plate accuses machine: Interface of soft drive of clavier of indication screen of liquid crystal of memory of hard disk of Piii700 above Cpu, 40g, 128m, 12 〞 , feeling, belt and Dvd CD driver, Usb and Rj45 interface; (2) board card: 813b A/d board, 1751d I/o board, 7216 relay board (include Odc5 or relay of Idc5b solid state) , 785 relay board; (3) S7-300 series Plc: Cpu module: Cpu314, flash Eprom memory gets stuck (64k) , 5a of Ps307 power source, sm321 inputs module (32 bits of 24v Dc) 3, sm322 outputs module (at 16 o'clock 24v Dc) 4, 40 needles terminal 3, 20 needles terminal 4, 480mm slideway 1. 3 projects are evaluated (1) control system implementation moves to the machine, process of movement of hydraulic press instrument, foundry technology, holding furnace heats, casting mould includes pressure, temperature, time, place in cooling process inside craft parameter undertakes be controllinged effectively. The system has data to save a function, can access, adjust and management casts parameter. (2) control precision is tall, fill model, protect press level pressure deviation to be worth ≤ 3mbar, deviation of pressure of phase rising juice is worth ≤ 5mbar, deviation of boost phase pressure is worth ≤ 10mbar. (3) have pressure to compensate ability automatically, the pressure inside holding furnace is OK the curve according to set is accurate, repeat emersion, and do not get atmospheric pressure of pipeline of holding furnace leak, air feed wave motion and metallic fluid fluctuant influence (holding furnace is serious leak except) . (4) the step up curve that can need free set to amount to 8 paragraphs at most according to craft keeps buckling line with a paragraph. The furnace to 800l of ≤ of cubage of the chamber of a stove or furnace, speed of the biggest boost can amount to 100mbar/s. (5) have friendly man-machine interface, can input parameter of of all kinds craft expediently. (6) have number to reach tone to use a function according to saving. Every annulus model after foundry technology parameter can be inputted and affirming save automatically, can call from inside the system directly later. (7) low Die Casting builds control system to have function of breakdown self check, maintenance is convenient. Technology of automation of control of industry of our country of 4 last words develops at full speed, be versed in especially the application that accuses machine and Plc is more mature, through effort of nearly 3 years, we dominate industry successfully machine and Plc apply in hub low Die Casting to build at the same time in machine. CNC Milling CNC Machining