A kind of machine for shrinking
The utility model belongs to field of mechanical technique, relates to a kind of machine for shrinking, particularly a kind of machine for shrinking that can realize the processing of the large contracting ratio of pipe.
In metal processing industry, tubing is carried out to expansion-contraction pipe operation normally completes by machine for shrinking, machine for shrinking can be realized tubing reducing and tubing enlarging function, and tubing snap close is the moulding process that pipe end diameter is dwindled, and tubing enlarging is the moulding process that pipe end diameter is expanded.The reducing of tubing and enlarging are mainly used in the docking of pipe fitting, in the docking of the isometrical thin-walled draw of routine part, general is carried out a draw moulding to the pipe of inserting paragraph, just can reach design technology requirement, but in not isometrical or the thicker draw part docking of tube wall, draw ratio has exceeded the once greatest limit of the conventional draw, need to be through twice or the draw repeatedly, and size just can reach the technological requirement of design.
Draw part utilizes pipe-reduction mold on machine for shrinking, to make tubing generation plastic deformation and completes draw processing, and the tube outer diameter after the draw diminishes, but pipe wall thickness, length all can have a little to increase, and hardness also can increase.Through the workpiece of the draw repeatedly, because its size changes larger, Workpiece length, wall thickness and hardness etc. after the draw all can produce variation clearly, the particularly increase of workpiece hardness after the draw, make sometimes the pipe cracking of draw end and produce waste product, therefore need the draw number of times of reasonable arrangement workpiece and distribute the size of each draw and ensure the quality of the draw workpiece interval time.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, has proposed a kind of machine for shrinking, and it can carry out continued operation to pipe, realizes large contracting than processing, and productivity ratio is high.
The purpose of this utility model can realize by following technical proposal: a kind of machine for shrinking, comprise frame, frame is provided with the clamp mechanism for clamping pipe, for draw mechanism that end, pipe one end is processed and the locating piece for the pipe other end is positioned, described locating piece is positioned at a side of clamp mechanism, described draw mechanism is positioned at the opposite side of clamp mechanism, it is characterized in that, described draw mechanism comprises the draw die holder with draw mould, the hydraulic motor that can drive draw mould to rotate around horizontal axis on draw die holder, be connected in the slide unit in frame, be slidably connected at the movable carriage on slide unit, the programmable logic controller (PLC) that can drive movable carriage and draw die holder to press to or depart from the slip hydraulic cylinder of pipe port and move for controlling hydraulic motor and slip hydraulic cylinder, on one end end face of described draw mould, there is the mould mouth that several can tighten up pipe port.
The technical program, the flat horizontally set of the horizontal saliva of each mould mouth of draw mould, and the size of each mould mouth is different, rotate draw mould and can carry out draw processing to pipe successively by descending mould mouth, realize the large contracting of pipe than processing, enhance productivity, and because pipe only carries out one-time positioning clamping in process, the axiality that can ensure repeatedly the draw, yield rate is high.The programmable logic controller (PLC) adopting in this machine for shrinking, i.e. PLC, for the content of prior art, does not repeat herein.
In above-mentioned machine for shrinking, on the sidewall of described draw mould, be provided with several and mould mouth position projection one to one, described projection is horizontally installed on the sidewall of draw mould, and described machine for shrinking also comprises the touch switch suitable with described projection.After draw mould rotate in place, projection contacts with touch switch, and slip Driven by Hydraulic Cylinder movable carriage and draw die holder press to pipe port and carry out draw processing.
In above-mentioned machine for shrinking, the other end of described draw mould has a connecting axle that passes draw die holder, and the rotating shaft of described connecting axle and described hydraulic motor is in transmission connection by gear pair, and described hydraulic motor is fixedly connected on movable carriage.Hydraulic motor is along with movable carriage moves back and forth together,
In above-mentioned machine for shrinking, the inner bottom of described mould mouth has the chamfering one inside contracting.Pipe after the draw, pipe end place can be slightly larger than draw middle part actual size, and there will be some phenomenon of turning up, if directly carry out chivalrous road draw operation, actual draw power can become larger, make draw difficulty, when serious, can pipe pressure turned round, press askew and produce waste product, by the bottom at mould mouth, the little chamfering or the small round corner that slightly inwardly turn over being set can address the above problem effectively.
In above-mentioned machine for shrinking, the die orifice place of each described mould mouth all has chamfering two, and described in each, the angle of inclination size of chamfering two is all identical.This design can ensure that pipe is after the draw repeatedly, and large changeover portion chamfering between small-bore connects steadily.
In above-mentioned machine for shrinking, described mould mouth is the uniform setting of circular array centered by the pivot center of draw mould.
In above-mentioned machine for shrinking, described machine for shrinking also comprises that one is arranged on the discharging structure of frame lower, described discharging structure comprises motor and several and the axial vertically disposed discharging roller of pipe to be processed, and described discharging roller is arranged on the below of clamp mechanism and is driven by motor.After the pipe draw finishes, clamp mechanism is unclamped, and pipe is fallen on discharging roller, and discharging roller rotates and pipe is sent under motor drives, and motor can drive discharging roller to rotate by belt or chain structure.
In above-mentioned machine for shrinking, described clamp mechanism comprises clamping hydraulic cylinder, left clamp and the right clamp that pipe can be clamped, described left clamp is fixedly installed in frame, and described right clamp is slidably connected in frame and can drives reciprocating by clamping hydraulic cylinder.In the technical program, left clamp also can be made as non-fixing mechanism, and it also can drive reciprocating by clamping hydraulic cylinder.
In above-mentioned machine for shrinking, on the sidewall of described left clamp or right clamp, be provided with the gripper shoe of an energy horizontal hunting.Under left clamp and right clamp released state, gripper shoe is rocked to two interstitial sites between clamp, can drop in gripper shoe, to the pipe of dropping material after two clamps clamp pipe or the draw and machine, gripper shoe is arranged, so that pipe is fallen on discharging roller.
In above-mentioned machine for shrinking, described clamp mechanism also comprises that one can respond to the inductor of pipe position.When pipe is fallen in gripper shoe, may have uneven whereabouts phenomenon, detect pipe position by inductor, only have in the time that pipe enters into clamp mechanism and balance, restart clamping hydraulic cylinder clamping work pieces, seat presss from both sides bad workpiece and causes waste product.
Compared with prior art, the utlity model has following advantage: 1, adopted workpiece to fix, the conversion of draw mould order is carried out the draw to workpiece successively, make pipe disposablely continuously to carry out large contracting than processing, avoided repeating carrying, productivity ratio is high; 2, the axiality after the draw is high, and percent defective is low; 3, it adopts clamp mechanism horizontal motion to clamp workpiece, and workpiece is from the top automatic feed of clamp, and the workpiece after machining is from clamp below self-emptying, and Artificial Control is few, and automaticity is high.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A generalized section in Fig. 1.
Fig. 3 is the structural representation of draw mechanism in the utility model.
Fig. 4 is the schematic cross-section of draw mould in the utility model.
In figure, 1, frame; 2, pipe; 3, locating piece; 4, draw die holder; 5, draw mould; 5a, mould mouth; 5a1, chamfering one; 5a2, chamfering two; 5b, connecting axle; 6, hydraulic motor; 7, slide unit; 8, movable carriage; 9, gear pair; 10, slip hydraulic cylinder; 10a, piston rod; 11, projection; 12, touch switch; 13, left clamp; 14, right clamp; 15, discharging roller; 16, belt pulley; 17, motor; 18, belt; 19, gripper shoe; 20, clamping hydraulic cylinder; 21, inductor; 22, fixed head; 23, fixed bar.
Detailed description of the invention
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
See figures.1.and.2, the present embodiment is a kind of machine for shrinking, comprise frame 1, frame 1 is provided with the clamp mechanism for clamping pipe 2, one side of clamp mechanism has the draw mechanism for pipe 2 ends, one end are processed, the opposite side of clamp mechanism has the locating piece 3 for pipe 2 other ends are positioned, the below of clamp mechanism is provided with discharging structure, this discharging structure comprises motor 17 and several and the axial vertically disposed discharging roller 15 of pipe to be processed 2, the sidepiece of discharging roller 15 is connected with a belt pulley 16, motor 17 drives belt pulley 16 and discharging roller 15 to rotate by belt 18, thereby the pipe processing 2 can be sent.
See figures.1.and.2, clamp mechanism comprises clamping hydraulic cylinder 20, left clamp 13 and the right clamp 14 that pipe 2 can be clamped, left clamp 13 is fixedly installed in frame 1, and right clamp 14 is slidably connected in frame 1 and can drives reciprocating by clamping hydraulic cylinder 20.The present embodiment is provided with the gripper shoe 19 of an energy horizontal hunting on the sidewall of right clamp 14, this gripper shoe 19 is rocked to two gap locations between clamp in the time that right clamp 14 and left clamp 13 separate, avoid pipe 2 directly to drop on the discharging roller 15 of clamp mechanism below, after the draw machines and before right clamp 14 separates with left clamp 13, gripper shoe 19 is arranged, and can make pipe 2 can directly drop on discharging roller 15 after clamp mechanism is unclamped.The present embodiment is also provided with the inductor 21 that can respond to pipe 2 positions on left clamp 13, its can ensure pipe 2 fall in gripper shoe 19 and keep balance after just drive right clamp 14 to clamp.In the present embodiment, left clamp 13 has the semicircle loop concave coordinating along horizontal direction setting and with pipe 2, right clamp 14 has the semicircle loop concave coordinating along horizontal direction setting and with pipe 2, right clamp 14 and left clamp 13 can form a circular port that clamps pipe 2 after closure mutually, the size of this circular port is identical with pipe 2 external diameters, can avoid pipe 2 that unnecessary distortion occurs in clamping.The end face of gripper shoe 19 is equal with the bottom of circular port.
With reference to Fig. 3, draw mechanism comprises the draw die holder 4 with draw mould 5, the hydraulic motor 6 that can drive draw mould 5 to rotate around horizontal axis on draw die holder 4, be connected in the slide unit 7 in frame 1, be slidably connected at the movable carriage 8 on slide unit 7, the programmable logic controller (PLC) that can drive movable carriage 8 and draw die holder 4 to press to or depart from the slip hydraulic cylinder 10 of pipe 2 ports and move for controlling hydraulic motor 6 and slip hydraulic cylinder 10. movable carriage 8 is slidably connected at slide unit 7 by dovetail rail structure, the rear end of movable carriage 8 is connected mutually with the piston rod 10a of slip hydraulic cylinder 10.On draw die holder 4, be provided with the draw mould 5 of a horizontally set and the hydraulic motor 6 that can drive draw mould 5 to rotate around horizontal axis, on the front end end face of draw mould 5, there are 3 mould mouth 5a that can tighten up pipe 2 ports, 3 mould mouth 5a uniform settings of circular array centered by the pivot center of draw mould 5, and caliber size reduces successively along pointer.The rear end of draw mould 5 has a connecting axle 5b who passes backward draw die holder 4, hydraulic motor 6 is fixedly connected on movable carriage 8, on movable carriage 8, be vertically provided with a fixed head 22, the rotating shaft of hydraulic motor 6 is passed this fixed head 22 afterwards and connecting axle 5b is in transmission connection by gear pair 9.
With reference to Fig. 3, on the sidewall of draw mould 5, be provided with 3 and mould mouth 5a position strip projection 11 one to one, projection 11 is horizontally installed on the sidewall of draw mould 5.The sidepiece of fixed head 22 has a fixed bar 23 extending forward, and on fixed bar 23, being provided with 12,2 touch switches 12 of 2 touch switches can match with projection 11, and the stroke of movable carriage 8 and draw die holder 4 is controlled.
With reference to Fig. 4, the inner bottom of each mould mouth 5a has chamfering one 5a1 inside contracting, and the die orifice place of each mould mouth 5a all has chamfering two 5a2 that extend out, and the angle of inclination size of 3 chamfering two 5a2 is all identical.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.