CN2212470Y

CN2212470Y - Gas cutter for circular blank of steel pipe

Info

Publication number: CN2212470Y
Application number: CN 94243590
Authority: CN
Inventors: 丁爱平; 王惠雪
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-01
Filing date: 1994-11-01
Publication date: 1995-11-15
Anticipated expiration: 2004-11-01

Abstract

The utility model relates to a gas cutter for circular blank of a steel pipe, which comprises a frame, a motor and a reducer, wherein, an output shaft of the reducer is provided with a gear, and the gear is provided with four gears which are engaged with the gear making the gear as a center; the in-phase positions of the four gears are respectively provided with positioning pins; bottom boards which are provided with gas cutting torches are fixed on the four pins; the lower sides of the gas cutting torches are provided with circular pipe centring devices; wheels are arranged below the frame; a combustion-supporting wire feeding mechanism is arranged on the frame or beside the frame. The utility model has the advantages of stable running and high efficiency.

Description

Gas cutter for circular blank of steel pipe

The utility model relates to a kind of steel tube blank gas cutting machine that is used for the cutting of rail seamless steel pipe streamline circle stock scale.

At present, existing introduction blank gas cutting machine, its gas torch takes the air line or the camber line opposite with steel tube blank, and cutting nozzle and blank circular surfaces distance change big in cutting process, and energy consumption is big.When cutting, adopts the beginning preheating of spray iron powder, the hot spot location is difficult to control and iron powder price height, cost is expensive, be difficult for promoting, domestic existing a kind of four linkages that utilize make cutting nozzle make the burning torch running gear that the cutting circular steel of arc-operation is used along the semicircle of round steel, be contained in reducer output shaft by a connecting rod and make driving lever, for avoiding the four connecting rod connecting pin diameters of axle its traveling comfort of accumulation gap affects to each link, on the drive connecting rod axle sleeve He on the casing extension spring is being housed, to remedy these gap widths, because the accumulation gap width has a tolerance range scope by other part error amount decision, is very difficult so select suitable spring rate value for use, cutting torch is contained on the four connecting rod cutting ferrules, referring to the patent No. 91109534.9 declaratives, owing to be that a point connects in theory, the flatness stability of four connecting rods is difficult for guaranteeing.

The purpose of this utility model is to provide a kind of plane stability and perpendicularity that can guarantee gas torch for the cutting of the scale of steel tube blank in the rolling seamless steel pipe flowing water, cutting torch and institute cyclotomy rod surface can keep equidistant in cutting process, operate steadily the steel pipe circle blank gas cutting machine that preheating time is short.

The purpose of this utility model is achieved in that

The utility model comprises frame, motor, decelerator, it is characterized in that: a gear is housed on reducer output shaft, with this gear is that the center is provided with four gears and its engagement, same-phase place at these four gears respectively is provided with shop bolt, the base plate of installing gas torch is fixed on these four pins, be provided with the pipe centring means below the gas torch, frame is provided with wheel, and on the frame or frame side is provided with combustion-supporting wire feeder.

The utility model is after steel tube blank arrives the scale position, at first compressed with cylinder operated V-type foundary weight, play blank centering simultaneously and act as assurance v block centering, complete machine is made transverse horizontal displacement with wheel on guide rail, its centering process is to locate automatically like this, this moment, the cutting torch adjusted was positioned at the starting point of cutting well, feed in preheat flame combustion-supporting by wire feeder iron wire at this some place, thereby can obviously shorten preheating time, gas torch is fastened in two movable cutting ferrules, by gear, the tooth bar transmission can be adjusted gas torch, two fixedly in the cutting ferrule on, move down, thereby adjustment upright position, whole gas torch device is by means of fixing cutting ferrule, be fixed on the slide plate that to do to move both vertically, and this slide plate is contained on the base plate that can do circular motion, so not only finished the upright position of circular motion but also adjustment cutting torch that can be random at any time, circular motion is achieved in that the decelerator of motor drives that has the variable frequency power source power supply of stepless speed regulation by, one gear is housed on the output shaft of decelerator, with this gear is four gears around the center drives, same-phase place at these four gears respectively is provided with shop bolt, and the base plate of gas torch just is fixed on these four pins.For finishing automatic control, the spacing point in the two ends of the circular motion of base plate is established near switch, and cutting back backlash journey adopts fast return, turns back to original position behind the fast lifting cutting torch, the operation of the next circulation of beginning.

The utility model is pre-heated work pieces because the employing iron wire is ignited, fixed point easily, cheap, and can drop to preheating time about 10 seconds by about 45 seconds (need not any fire-lighter), make locking phase to engagement in level or vertical direction respectively each other owing to drive four gears of gas torch, no matter there is which kind of gap of adding up can not make the gas torch phenomenon that occurs pitching suddenly, thereby guaranteed the stationarity of motion.The plane stability and the resistance to overturning of the base plate that gear and its drove are good, are again 4 transmissions, have guaranteed the perpendicularity of gas torch cutting ferrule, and this function becomes a whole piece rolling seamless steel pipe streamline unit of control automatically.

Below in conjunction with drawings and Examples the utility model is further described:

Fig. 1 is a front view of the present utility model,

Fig. 2 is a side view of the present utility model.

See accompanying drawing: be provided with motor in the frame 18, decelerator (not drawing among the prior art figure), be fixed with gear 3 on the output shaft 4 of decelerator, with this gear 3 is that the center is provided with four gears 6 and gear 3 engagements, same-phase at four gears 6 respectively is provided with shop bolt 5, this shop bolt is approximately done 120 ° circular arc reciprocating motion, (by the control of base plate two ends limit switch), be impulse stroke counterclockwise, about about 30 seconds, clockwise direction is about about 15 seconds of quick backlash stroke, about 14 seconds of the preheating time of staying; Base plate 1 is fixed on these four pins 5.

Base plate 1 upper end is fixed with and promotes cylinder 2, the lower end is fixed with guide rail 10, slide plate 14 is in guide rail 10, can slide along guide rail 10, its upper end is fixed together with the piston rod outer end that promotes cylinder 2, (moving both vertically fast when the backhaul by promoting cylinder 2) has two fixedly cutting ferrules 15 on the slide plate 14, gas torch 12 is set on fixedly in the cutting ferrule 15.

Also binding round on the gas torch 12 has two movable cutting ferrules 7, the two ends of tooth bar 8 to be separately fixed on two movable cutting ferrules 7, constitutes integral body with gas torch, and the other end that is fixed on the handwheel 9 on the frame is a gear, and itself and tooth bar 8 mesh.Rotate handwheel 9, the gear of its other end rotates, and moves thereby drive tooth bar 8, because tooth bar 8 is fixed on the movable cutting ferrule 7, drive activity cutting ferrule 7 and gas torch 12 are vertical mobile again, thereby has played the perpendicular positioning regulating action to gas torch 12.

Be provided with the circular pipe blank centring means below the gas torch 12, this circular pipe blank centring means constitutes by promoting cylinder 11 and v block 13, promotes cylinder 11 and is fixed on the frame 18, and the upper end of v block 13 is fixed on the piston rod outer end that promotes cylinder 11.Promote cylinder 11 and can adjust the position of v block 13 in vertical direction.

The lower end of frame 18 also is provided with wheel, and complete machine can be moved along guide rail (not drawing among the figure), thereby adjusts the horizontal level of v block 13 and gas torch 12.

Combustion-supporting wire feeder can be installed on the frame 18, also can be contained in any position on frame 18 sides, combustion-supporting wire feeder comprises: iron wire props up roller 19, servo 16(prior art) and wire-feeding pipe 20, iron wire is through in the wire-feeding pipe 20, and the front end of wire-feeding pipe 20 is positioned at the cutting starting point place of pipe.Servo 16 drives iron wire walking automatically forward, and reaching the cutting starting point place of pipe along wire-feeding pipe 20, iron wire is heating rapidly under the powerful flame of gas torch, burns red, and make the circular pipe blank cut point preheating of its position, improve cutting efficiency thereby shorten preheating time.

Claims

1, a kind of steel pipe circle blank gas cutting machine, comprise frame, motor, decelerator, it is characterized in that: a gear is housed on reducer output shaft, with this gear is that the center is provided with four gears and its engagement, same-phase place at these four gears respectively is provided with shop bolt, and the base plate of installing gas torch is fixed on these four pins, is provided with the pipe centring means below the gas torch, frame is provided with wheel, and on the frame or frame side is provided with combustion-supporting wire feeder.

2, steel pipe circle blank gas cutting machine according to claim 1, it is characterized in that: the upper end of described base plate is fixed with the lifting cylinder, the lower end is fixed with guide rail, slide plate is in guide rail, its upper end is fixed together with the piston rod outer end that promotes cylinder, two fixedly cutting ferrules are arranged on the slide plate, and gas torch is set on fixedly in the cutting ferrule.

3, steel pipe circle blank gas cutting machine according to claim 1, it is characterized in that: also binding round on the gas torch has two movable cutting ferrules, and the two ends of tooth bar are separately fixed at two active card and put, and constitutes whole with gas torch, the other end that is fixed on the handwheel on the frame is a gear, and itself and tooth bar mesh.

4, steel pipe circle blank gas cutting machine according to claim 1, it is characterized in that: the pipe centring means constitutes by promoting cylinder and v block, promotes cylinder and is fixed on the frame, and the v block upper end is fixed on the piston rod outer end of lift cylinder.

5, steel pipe circle blank gas cutting machine according to claim 1, it is characterized in that: combustion-supporting wire feeder comprises: iron wire props up rod, and servo and wire-feeding pipe, iron wire are through in the wire-feeding pipe, and the front end of wire-feeding pipe is positioned at the cutting starting point place of pipe.