Double station round bar forging furnace   Working principle and structure

Two -station design, a total of 2 sets, the power supply is 2 × 1250KW , 2 × 1000KW two sets of furnaces are used for staggered loading, staggered discharge, for φ100 × 450 and φ115 × 510 , the loading interval is 30 seconds each , The same discharge is also 30 seconds per turn and adjustable. The cranking and front axle loading intervals are each 1.5-2 minutes, and the beat is adjustable.

The feeding machine is designed as a chain feeding machine with an angle of 62 degrees to the ground . The frame is welded with 200 channels of steel. The chain is a paver chain with a pitch of 101.6mm , the roller is straight φ38.1 , and the ultimate load is 290KN . The material of φ100 and φ115 is set to be one turn per minute and fed twice. For the crankshaft and the front axle , it is set to 2 minutes, and it is also feeding twice. In order to realize the adjustable beat, the motor of the loading machine is controlled by the inverter. The operation is set to manual or automatic.

When the loading machine lifts the material to the top, the material automatically rolls down the 2° swash plate into the V -shaped groove. Due to the slow speed of the hoist, there is almost no impact when the material rolls off, and theproximity switch is provided at the bottom of the V -shaped groove. At this point, the switch detects the material, after 1 second delay , the push cylinder works, (the piston diameter of the push cylinder is φ125 and φ100 , the cylinder stroke is 550mm ), after the material is pushed onto the conveyor roller, the cylinder returns, after 30 seconds, The feeding machine lifts the second material to the top end, the material rolls into the V -shaped groove, the horizontal cylinder works, and the V -shaped material frame and the material are pulled to the second station, and the bottom proximity switch of the V -shaped groove detects the material. The push cylinder pushes the material onto the V -shaped transfer roller. After the cylinder returns, the magnetic switch gives a signal, and the lateral cylinder returns the V -shaped rack to the original position. The structure is as follows: V -shaped material rack: Two linear guide rails for the supporting and sliding matching of the V -shaped material frame, and the movement of the V -shaped frame is performed by the cylinder of φ125 with a stroke of 1600 .

Transmission roller structure, including frame, sprocket, chain (pitch 15.875 ), bearing block, roller and cycloid reducer, etc. The length of the transfer roller is determined by the length of the material and the production cycle, φ100and For the material of φ115 , the length of the conveying roller is equal to about twice the length of the longest material, which is 1032 , while the length of the front axle cranking roller is 2250 , which is about 1.5 times of the longest material. The transmission speed per minute of the conveying roller is slightly. Faster than the set production cycle of about 40mm , the transmission raceway is designed to be V -shaped, with an angle of 120 degrees, an outer diameter of φ140 , and a center distance between the two rollers of 206.4 .

The pressure roller feeding mechanism and the pressure roller feeding mechanism adopt the double pressure wheel form, thereby ensuring that no material is slipped and no hysteresis occurs during the heating and conveying process, so that the temperature of the heating material is more uniform. The structural components are: steel bracket, bearing, shaft, pressure roller (combined) sprocket, chain, gear, cycloidal pinwheel reducer, cylinder pressing mechanism, etc.The motor is controlled by a frequency converter to achieve the set production cycle. When the material enters the first pressure roller through the transfer roller, the opposite-type photoelectric switch set here detects the material and the cylinder compression mechanism works. The cylinder piston diameter is φ125 , and the strokes are: small material is 100 , and large material is 125 . In the squeeze type, the material is propelled into the heating furnace at a set production tact, and the working pressure of the cylinder is 0.4 MPa , and the working pressure is 490 KG/cm 2 .

Heating furnace: The total length of the heating furnace (including holding furnace) is 7750 , φ100 and φ115 material holding furnace, length 1600mm , front axle, crankshaft holding furnace length 2600mm , sensor waterway adopts stainless steel quick-change joint, copper row connection adopts squeeze type There is no bolt connection, and the connection between the copper row and the copper row is simpler, convenient and reliable.

There is a 250mm transition zone between the heating furnace and the holding furnace . The purpose is to remove the scale. The water-cooled rail can be divided into two sections for easy processing and maintenance. In order to make the heating material smoothly transition from the heating furnace to the holding furnace, at 250mm. There is a power transfer roller to prevent heat radiation and burn out the bearing. The roller shaft has a water cooling system.

Capacitor cabinet: all welded by profile steel, fully enclosed length 8000 , width 900 , height 1150 , for easy transportation, when design and manufacture, it is divided into 2 pieces, the whole set of capacitor cabinets, also equipped with anti-shock device, shock absorber spring height 150 , diameter Φ100 , the spring wire is φ10 , a total of 130 .

Quick discharge and discharge pressure roller mechanism, the structural components are: discharge pneumatic automatic pressure roller mechanism, over temperature, under temperature sorting mechanism, qualified material blocking mechanism, qualified material cylinder pushing mechanism, etc., transmission part has sprocket The chain and power adopt the cycloidal pinwheel reducer, and the transmission speed is 435mm per second .

The pressure roller mechanism, when the heating material enters the first conveying roller path of the quick discharging through the heating furnace, the material outcrop is set here to detect the photoelectric switch, the cylinder of the pressure roller mechanism works immediately, and the upper pressing wheel is pushed The heating material is pressed and the material is quickly pulled out by the transmission of power without being slipped. The diameter of the cylinder piston is φ125 , the stroke of the small material is 100 , and the stroke of the large material is 125. Because the heating temperature of the heating material is too high ( 1250 °C ), in order to prevent the material from sticking, the lower pressing wheel in front of the furnace mouth is designed as a V -shaped hexagonal wheel. In this way, the material has a jump forward in the fast transmission, and the adhesive will automatically get rid of the opening.

Unqualified materials (over-temperature, under-temperature), when the material exits through the furnace mouth, it is measured by the infrared thermometer. If the test is over-temperature or under-temperature, the cylinder stop mechanism is provided at 1400 . At this time, the cylinder rises (cylinder block mechanism is provided with the cylinder radial axial guiding device), blocks the material, the magnetic switch gives a signal, and the cylinder pushing mechanism rises between the raceways, and the unqualified material is ejected, such as The over-temperature material will roll out along the swash plate (at this time the cylinder is lifted out). If the temperature is low, the sorting mechanism cylinder shrinks, and the under-temperature material rolls out along the opening of the slide. If the qualified material is measured by the infrared thermometer, all the institutions at the unqualified material sorting mechanism will not operate. When the qualified material quickly reaches the top of the discharge mechanism, it is blocked by the fixed material blocking mechanism here, and hits the travel switch installed here, the signal is sent, the cylinder ejection mechanism between the quick discharge machine raceway and the intermediate raceway cylinder The ejector mechanism is raised at the same time, and the material is lifted up. When the cylinder is raised to the position, the magnetic switch gives a signal, the qualified push cylinder works, and the qualified material is pushed from the center of the quick discharge to the center of the middle roller through the transition plate. Starting from the centerof the cylinder V -shaped frame, the push cylinder returns, the magnetic switch gives a signal, and the quick discharge ejector mechanism and the intermediate raceway cylinder ejector mechanism return to the original position at the same time, and the intermediate raceway quickly transfers the material to the production line.

All of the above actions are performed in staggered execution.