CN104889181A - An automatic three-wire drawing machine - Google Patents

Abstract

The present invention relates to the technical field of drawing equipment, and in particular to an automatic three-wire automatic drawing machine, comprising a main frame, a loading rack is arranged on one side of the main frame, an automatic loading mechanism is arranged on the loading rack, a three-slot pipe loading device is obliquely arranged on the top layer of the main frame, a pushing trolley is arranged at the rear end of the three-slot pipe loading device, a lifting pulley is arranged below the three-slot pipe loading device, a front baffle plate is arranged at the front end of the three-slot pipe loading device, a pipe pressing mechanism is arranged between the three-slot pipe loading device and the front baffle plate, a core sleeve mechanism is arranged on the front side of the three-slot pipe loading device, a drawing mechanism is arranged below the main frame, and an automatic material receiving mechanism is arranged on one side of the drawing mechanism. Compared with the prior art, the three-wire automatic drawing machine of the present invention can draw three pipes at the same time, which is more than three times the production efficiency of the current single-wire drawing machine, has a compact overall structure, occupies a small area, is practical and efficient, and the whole process is automatically carried out, with high production efficiency, effectively reducing the labor intensity of operators, and highly humanized workstations.

Description

An automatic three-wire drawing machine

technical field

The invention relates to the technical field of drawing equipment, in particular to an automatic three-wire automatic drawing machine.

Background technique

The hot rolling method for seamless steel pipes is the main way of producing seamless steel pipes today, but the dimensional accuracy of the steel pipes produced by the hot rolling method is not high, and even concave, straight through, indentation and other defects appear. In order to obtain a smooth surface, the dimensional accuracy is higher , the seamless steel pipe with few defects often adopts the drawing method. The drawing machine is a kind of mechanical equipment used to reduce the diameter and wall or reduce the wall and expand the diameter of the pipe. At present, most of them often use chain transmission. The chain-type bar automatic drawing machine for traction and drawing needs to use manual auxiliary feeding and discharging, which cannot realize automatic production and affects the production effect. Moreover, the current drawing machines are all single-line, that is, only one wire at a time. One pipe can be drawn, the production efficiency is low, and the production energy consumption is huge.

Therefore, it is urgent to provide an automatic three-wire drawing machine to solve the deficiencies in the prior art.

Contents of the invention

The automatic three-wire drawing machine provided by the invention can draw three pipes at the same time, which is more than three times the production efficiency of the current single-wire drawing machine, and the whole process is carried out automatically, which is energy-saving, environment-friendly and high in production efficiency.

To achieve the above object, the present invention adopts the following technical solutions:

A three-wire automatic drawing machine, including a main frame, a feeding rack is provided on one side of the main frame, an automatic feeding mechanism is provided on the feeding rack, and three slots for pipe loading are arranged on the top layer of the main frame obliquely device, the rear end of the three-slot pipe loading device is provided with a pushing trolley, the lower part of the three-slot pipe loading device is provided with a jacking pulley, the front end of the three-slot pipe loading device is provided with a front blocking plate, and the three-slot pipe loading device A pipe pressing mechanism is provided between the pipe loading device and the front baffle plate, a sleeve core pipe threading mechanism is provided on the front side of the three-slot pipe loading device, and a pulling mechanism is provided below the main frame. One side of the pulling mechanism is provided with an automatic material receiving mechanism.

Specifically, the automatic feeding mechanism includes a tumbling material rack, a slanting material rack, a limit mechanism, a material hooking mechanism, and a material distribution mechanism. One side of the frame, the limit mechanism includes a limit frame and a limit block located on the limit frame, and the hooking mechanism includes a hook frame and an L-shaped hook located on the hook frame , the material distributing mechanism includes a material distributing frame, a rack motor and a rack, and the rack is engaged with the rack motor.

Specifically, the core-piercing mechanism includes a core-pulling frame, a core-pulling rod, a core-aligning support frame, a core-pulling frame lifting frame, a core-pulling frame lifting frame positioning frame, a core-pulling slide frame, and a core-pulling rod return frame , the core-pulling rod is arranged on the core-pulling frame, and the core-pulling frame is erected on the rear end of the core-pulling frame for lifting and sliding the core-pulling rod, and the core-pulling frame is lifted and erected It is used to support the core-pulling frame and the core-pulling rod under the core-pulling frame. The core-pulling frame lifting frame is positioned and erected on one side of the core-pulling frame lifting frame. The lower part of the core-pulling rod is used to reduce the resistance when the core-pulling rod passes through the pipe, and the stripping material of the core-pulling rod is erected on the front end of the core-pulling frame.

Specifically, the tail end of the core-pulling rack is provided with a core-pulling tail end fixing frame.

Specifically, the front end of the core-pulling rod ejection frame is provided with a material ejection frame, which is used to push the pipe material into the drawing mold after being cored and drawn.

Specifically, the drawing mechanism includes a limit frame, a mold seat, a drawing mold, a drawing trolley, an air nozzle, a main motor braking system, a double-stroke speed limit switch, and an inclined clamp type clamping mechanism. At the front end of the sleeve core mechanism, the drawing die is set on the mold seat, the drawing die is in a bowl-shaped mode, the drawing trolley is set on the chains on both sides of the main frame, the The air nozzle and the clamping mechanism are used to clamp the head of the pipe, and the drawing trolley is arranged on the lower layer of the main frame for drawing the pipe.

Specifically, the rear end of the drawing trolley is provided with an automatic lifting frame, and the drawing trolley is also provided with chain direct connection frames on both sides.

Specifically, the automatic receiving mechanism includes an intermediate material receiving rack and a finished product receiving rack, and a synchronous chain is provided on the intermediate material receiving rack, flexible plastic is used on the synchronous chain, and an inclined The surface of the cantilever is laid with a flexible film, and the finished product receiving rack is provided with a braided belt.

Specifically, a receiving platform is provided on one side of the intermediate material receiving frame, and the receiving platform adopts a wooden structure.

Specifically, the automatic receiving mechanism also includes a power operation of the finished product receiving rack and a self-adaptive tightness detection and control device for the suspenders.

The invention discloses a three-wire automatic drawing machine, which comprises a main frame, a feeding rack is arranged on one side of the main frame, an automatic feeding mechanism is arranged on the feeding rack, and the top layer of the main frame is arranged obliquely. There is a three-slot pipe loading device, the rear end of the three-slot pipe loading device is provided with a pushing trolley, the lower part of the three-slot pipe loading device is provided with a jacking pulley, and the front end of the three-slot pipe loading device is provided with a front baffle plate, A pipe pressing mechanism is provided between the three-slot pipe loading device and the front baffle plate, a sleeve core mechanism is provided on the front side of the three-slot pipe loading device, and a pulling mechanism is provided below the main frame. One side of the drawing mechanism is provided with an automatic material receiving mechanism. Compared with the prior art, the three-wire automatic drawing machine of the present invention can draw three pipes at the same time, which is more than three times the production efficiency of the current single-wire drawing machine. The overall structure is compact, the floor space is small, practical and efficient, and the whole process is automatic, the production efficiency is high, the labor intensity of the operator is effectively reduced, and the work position is highly humanized.

Description of drawings

Fig. 1 is a front view of a three-wire automatic drawing machine of the present invention.

Fig. 2 is an overall view of a three-wire automatic drawing machine of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the examples, which are preferred embodiments of the present invention.

Example 1

As shown in Figure 1-2, a three-wire automatic drawing machine includes a main frame 1, a feeding rack 11 is provided on one side of the main frame 1, and an automatic feeding mechanism 2 is provided on the feeding rack 11, The top layer of the main frame 1 is obliquely provided with a three-slot pipe loading device 3, the rear end of the three-slot pipe loading device 3 is provided with a pushing trolley 4, and the bottom of the three-slot pipe loading device 3 is provided with a jacking pulley 5, The front end of the three-slot pipe loading device 3 is provided with a front baffle plate 6, and a pipe pressing mechanism 7 is arranged between the three-slot pipe loading device 3 and the front baffle plate 6, and the three-slot pipe loading device 3. A core pipe threading mechanism 8 is provided on the front side, a drawing mechanism 9 is provided below the main frame 1, and an automatic material receiving mechanism 10 is provided on one side of the drawing mechanism 9. The channel of the three-groove tube loading device 3 is preferably a 90° structure, which can be used for large and small tubes, and the center of the tube is always on the same line as the center of the mold; the pushing trolley 4 is used to push the original embryo tube into the mandrel. ; The jacking pulley 5 can make the three original embryo tubes rolled in parallel, and the three tube heads are aligned. At the same time, the resistance when the material return trolley 4 moves can be reduced; the front baffle plate 6 is used to align the three tube heads in parallel; The pressing mechanism 7 is used to press down the three pipe heads, so that the pipes will not move and dislocate when aligning the core.

Specifically, the automatic feeding mechanism 2 includes a tumbling material rack 21, an inclined material rack 22, a limit mechanism 23, a hooking mechanism 24, and a material distribution mechanism 25. The tumbling material rack 21 is driven by a tumbling motor. The material rack 22 is located on one side of the tumbling material rack 21, the limit mechanism 23 includes a limit frame 231 and a limit block 232 arranged on the limit frame 231, and the material hook mechanism 24 includes a material hook. Frame 241 and the L-shaped hook 242 that is located on the hook frame 241, the material distribution mechanism 25 includes a material distribution frame 251, a rack motor 252 and a rack 253, and the rack 253 and the rack The motor 252 is engaged. First, put the bundled original embryo tubes into the tumbling material rack 21, the tumbling motor starts, and the tumbling material rack 21 shakes up and down, so that the cross pipes are automatically sorted, and when they rise to a high position, they are fed to the slanting material rack 22; Increase the inclination so that the curved pipe can be smoothly rolled into the limit frame 23; the limit frame 23 is used to automatically adjust the size of the pipe to ensure that only one original embryo tube is lifted at a time, and the limit block 232 can move forward and backward , choose the appropriate position according to the size of the pipe, and at the same time, roll the original embryo tube into the L-shaped hook 242 of the hook rack 241 and hook it; the material distribution mechanism 25 is used to send the original embryo tube into the three-slot tube loading device 3. One can be sent separately, usually into the middle groove for automatic drawing of a single pipe; two pipes can also be sent separately; usually sent into the left and right grooves for automatic drawing of two pipes; it is also possible Three pipes are sent separately for automatic drawing of the three pipes; the rack motor 252 starts to rotate forward, the rack 253 extends to the first slot, the motor stops, and at the same time the jacking motor rotates forward, the jacking material rises, and the original embryo tube rolls Lower the first tank; then complete the discharge of the second tank and the third tank in turn. The structure of the insertion frame adopts a hollow type, which reduces its own weight and effectively improves the load capacity of the pipe; the power supply mechanism adopts a concentrated and compact arrangement, which effectively reduces the space occupied by the equipment. The insertion and feeding mechanism is inclined to discharge with the main frame, so that the pipe can slide to the chute by its own gravity, effectively reducing the load of each motor.

Specifically, the core-piercing mechanism 8 includes a core-pulling frame 81, a core-pulling rod 82, a core-aligning support frame 83, a core-pulling frame elevating frame 84, a core-pulling frame elevating frame positioning frame 85, and a core-pulling sliding frame 86. And the core-pulling rod return frame 87, the core-pulling rod 82 is set on the core-pulling frame 81, and the core-aligning support frame 83 is set at the rear end of the core-pulling frame 81 for pulling the core-pulling frame 81 The core rod 82 lifts up and slides, and the core-pulling frame elevating frame 84 is arranged under the core-pulling frame 81 for supporting the core-pulling frame 81 and the core-pulling rod 82, and the core-pulling frame elevating frame is positioned The frame 85 is arranged on one side of the lifting frame 84 of the core-pulling frame, and the core-pulling sliding frame 86 is arranged below the core-pulling rod 82 to reduce the resistance when the core-pulling rod 82 passes through the pipe. The core rod stripping rack 87 is arranged at the front end of the core pulling rack 81 . The core supporting frame 83 is used to lift the core pulling rod 82 and slide to reduce resistance, and at the same time, improve the accuracy of the core pulling rod 82 against the pipe when lifting; the core supporting frame 83 can be based on the customer's need to choose an oil cylinder or an air cylinder Drive; the core-pulling frame lifting frame 84 is used to support the core-pulling frame 81 and the core-pulling rod 82, and the core-pulling rod 82 is lowered after passing through the pipe, so that the core-pulling rod is in a parallel position with the mold, reaching the highest When in position, the core-pulling rod is aligned with the pipe and penetrated, and the height of the core-pulling frame can be adjusted to the best position; The best position for the mold, the best position for core penetration at the highest position; the core-pulling slide frame 86 plays a sliding role in reducing the resistance of the return trolley when core-pulling and threading the tube; at the same time, it prevents scratches on the tube; After the tube is pressed simultaneously, the core-pulling rod ejector frame 87 pushes the core-pulling rod into the inside of the pipe, and the back-aligning dolly pushes the pipe into the mandrel to return to the original position after pulling the core.

Specifically, the tail end of the core-pulling rack 81 is provided with a core-pulling tail end fixing frame 88 . The tail end of the core pulling frame 81 is fixed, and the other end can be lifted.

Specifically, the front end of the core-pulling rod ejection frame 87 is provided with a material ejection frame 89, which is used for pushing the pipe material into the drawing die 93 for drawing.

Specifically, the drawing mechanism 9 includes a limit frame 91, a mold seat 92, a drawing mold 93, a drawing trolley 94, an air nozzle 95, a main motor brake system 99, a double-stroke speed limit switch, and an inclined clamp clamp. Mechanism 96, the limit frame 91 is arranged at the front end of the sleeve core pipe-through mechanism 8, the drawing die 93 is arranged on the die seat 92, the drawing die 93 is a bowl-shaped pattern, and the drawing die 93 is in a bowl shape. The pulling trolley 94 is set on the chains 12 on both sides of the main frame 1, the air nozzle 95 and the oblique clamp type clamping mechanism 96 are used to clamp the pipe head, and the pulling trolley 94 is set on the main frame 1 The lower layer of frame 1 is used for drawing pipes. After the limit frame 91 fixes the inner mold to a certain position, pull out the best position inside and outside. The gas nozzle has the buffer effect, and the pipe is directly ventilated to clamp the pipe. The spring buffer is used to suppress the inertial kinetic energy; the bowl-shaped mode can adjust the mold angle to play a role. The function of the straight pipe can be adjusted when drawing, that is, the straightness of the pipe after drawing; the drawing trolley 94 uses chains on both sides, and when pulling, if any one is decoupled, it has no effect on the remaining two and can work normally. And reciprocating transmission, the normal drawing machine uses one side to rotate from front to back, and the chain hook hooks the chain to pull, so that the trolley will not swing from side to side to play a balancing role; Non-standard customized large shaft diameter double-pitch roller gear, with high-pitch transmission and low noise function; chain pre-loading wheel, to prevent the longitudinal jump of the main chain; the use of yuri rubber material, effectively absorb the potential energy of chain vibration, built-in rails, the longitudinal movement of the trolley is straight The combination of high-speed guarantee and pulley track ensures that the trolley runs more smoothly; the main shaft adopts oblique installation, which can effectively prevent the leakage of lubricating oil, reduce the failure rate of equipment, improve production capacity and equipment utilization rate; the oblique pliers clamping mechanism 96 Afterwards, there is no need to ventilate, the pipe can be firmly clamped, and the main motor brake system 99 is used for instant braking of the inertia of the drawing trolley 94; the trolley can be accelerated and decelerated smoothly, and the trolley will not vibrate due to sudden start and stop, ensuring The straightness of the pipe is processed, and the double-stroke speed limit switch is used to limit the speed of the 94-stroke stroke of the pulling trolley. The clamped pipe will not be uncoupled when the trolley is running at idle speed between stroke 1 and stroke 2; it will switch to high-speed operation after traveling to stroke 2 , Improve production efficiency, the distance between stroke 1 and stroke 2 is 500-1000mm, the speed of the trolley can be adjusted without limit.

Specifically, the rear end of the drawing trolley 94 is provided with an automatic lifting frame 97 , and the drawing trolley 97 is also provided with chain direct connection frames 98 on both sides. After the drawing of three pipes is completed, the drawing trolley 97 will move forward due to inertia, and play a buffering effect; the chain direct link frame 98 on both sides is used for the inner trolley during drawing, so as to prevent decoupling from occurring when drawing halfway.

Specifically, the automatic receiving mechanism 10 includes an intermediate material receiving rack 101 and a finished product receiving rack 102, the intermediate material receiving rack 101 is provided with a synchronous chain 103, the synchronous chain 103 is made of flexible plastic, and the synchronous An inclined cantilever 104 is provided below the chain 103 , and a flexible film is laid on the surface of the cantilever 104 , and a braided belt 105 is provided on the finished product receiving rack 102 . The main frame on both sides; play the main role: after drawing, the material can be dropped freely in the middle: the drawing machine adopts the middle chain to drop the material, which can be easily transferred to the rotating chain, and the pipe will be damaged. The material rack reduces damage. The chain is made of flexible plastic, which is wear-resistant and has no damage to the surface of the pipe. The surface of the cantilever is laid with PE to make the pipe slide gently to the material receiving rack. The inverted L-shaped main frame has a durable structure and unlimited pipe falling. The drawn pipes are slid collectively to the braided belt 105 on the finished material receiving rack 102, which has zero wear on the pipes and low noise.

Specifically, a receiving platform frame 106 is provided on one side of the intermediate material receiving frame 101, and the receiving platform frame 106 adopts a wooden structure. When drawing, it rises to support the pipe, so that the pipe will not be bent and deformed; after the drawing is completed, it descends, and the pipe is placed in the middle blanking frame. Using wood accessories, light and wear-resistant, zero wear on the surface of the pipe.

Specifically, the automatic receiving mechanism 10 also includes a control device 107 for the power operation of the finished product receiving rack and the self-adaptive tightness detection and control device for the suspenders.

The invention discloses a three-wire automatic drawing machine, which comprises a main frame, an automatic feeding mechanism is arranged on one side of the main frame, and a three-slot pipe loading device is installed on the top layer of the main frame obliquely, and the three-slot pipe loading device The rear end of the device is equipped with a pushing trolley, the lower part of the three-slot pipe loading device is provided with a jacking pulley, the front end of the three-slot pipe loading device is provided with a front stopper, and the three-slot pipe loading device is connected to the front stop A pipe material pressing mechanism is provided between the material plates, a core sleeve mechanism is provided on the front side of the three-slot pipe loading device, a drawing mechanism is provided below the main frame, and an automatic retracting mechanism is provided on one side of the drawing mechanism. Compared with the existing technology, the three-wire automatic drawing machine of the present invention can draw three pipes at the same time, which is more than three times the production efficiency of the current single-wire drawing machine. The overall structure is compact, the floor space is small, and it is practical and efficient. And the whole process is automatic, the production efficiency is high, the labor intensity of the operators is effectively reduced, and the workstation is highly humanized.

The working steps and principle of a kind of three-wire automatic drawing machine of the present invention are as follows:

1. Put a bundle of original embryo tubes into the tumbling material rack and start the main engine; 2. The drawing cylinder or cylinder is started, the tumbling motor is started, on the tumbling material rack, the tumbling limit cylinder is lowered, and the original embryo tubes are rolled to the feeding position and arranged. Then, when the induction switch senses the material, the tumbling material rack will descend, and when it is in place, the tumbling limit cylinder will rise; 3. Start the pipe diameter motor, and adjust the position of the ejecting material so that the position of the ejecting material just matches the original embryo tube; 4. The rack The motor starts to rotate forward, the rack extends to the first slot, and the motor stops. At the same time, the ejector motor rotates forward, the ejector rises, and the original embryo tube rolls down the first slot; the ejector motor reverses and descends, and the rack motor starts to rotate forward. The rack extends to the second groove, the motor stops, and at the same time, the ejector motor rotates forward, the ejector rises, and the original embryo tube rolls down the second groove; The embryo tube rolls down the third groove; the jacking motor reverses and descends, the rack motor starts to reverse, and the rack retracts to its original position; 5. The cylinder of the front baffle rises, the roller cylinder in the middle of the three grooves rises, and the rollers rise; The front end of the embryo tube slides to the front of the baffle, and the pressing cylinder descends to press the head of the original embryo tube; 6. The cylinder of the core-pulling frame rises, and at the same time, the cylinder of the front baffle descends, the cylinder of the core-pulling rod is ejected, and the core-pulling mold enters the tube 7. The pusher motor starts, rotates forward, the pusher trolley advances, touches the travel switch, the rollers return to their original positions in turn, the core puller retracts, the pusher trolley advances and pushes the material in place, and the motor stops ;8. The pusher trolley returns to the motor to reverse, and the pusher trolley returns to its original position. At the same time, the core-pulling frame is lowered in place, and the cylinder of the core-pulling rod is stretched out, and the original embryo tube head is sent into the tube-drawing mold; 9. In the process of action 7 At this time, the drawing motor reverses, and the drawing trolley stops about one meter in front of the mold seat; the drawing motor stops, and after the completion of action 8, the drawing motor starts to reverse again, the trolley touches the mold, the motor stops, and the gas The valve is ventilated, the air nozzle clamps the head of the original embryo tube, the drawing motor rotates forward, and the drawing starts; 10. The drawing trolley moves forward, and the travel switch is touched once, and the material receiving rack rises. After the drawing is completed, the core-pulling cylinder retreats. The finished product falls on the receiving rack, and the receiving material drops; the transmission chain motor starts to rotate forward, and the finished product is brought out by the chain and enters the receiving rack; 11. In the automatic drawing state, when performing action 9, actions 4 and 5 are performed simultaneously , when action 10 is completed, then continue to action 6, and so on; 12. When the feeding sensor switch senses that there is no original embryo tube, the tumbling motor will automatically work to turn over the material.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand , the technical solution of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. a line automatic drawing machine, comprise mainframe, it is characterized in that: described mainframe side is provided with stock shelf, described stock shelf is provided with automatic feed mechanism, the top layer of described mainframe is provided with three groove tubulature devices obliquely, described three groove tubulature device rear ends are provided with pusher dolly, jack-up pulley is provided with below described three groove tubulature devices, described three groove tubulature device front ends are provided with front retainer plate, tubing feeding pressure mechanism is provided with between described three groove tubulature devices and described front retainer plate, cover core tube body is provided with on front side of described three groove tubulature devices, the below of described mainframe is provided with drawing mechanism, the side of described drawing mechanism is provided with automatic withdrawing mechanism.

2. three line automatic drawing machines according to claim 1, it is characterized in that: described automatic feed mechanism comprises rolling bin, oblique bin, position-limit mechanism, Gou Liao mechanism and feeding distribution mechanism, described rolling bin is driven by the motor that rolls, described oblique bin is located at described rolling bin side, described position-limit mechanism comprises position-limited rack and is located at the limited block on described position-limited rack, described Gou Liao mechanism comprises the L-type hook hooking bin and be located on described hook bin, described feeding distribution mechanism comprises material distributing rest, tooth bar motor and tooth bar, described tooth bar engages with described tooth bar motor.

3. three line automatic drawing machines according to claim 1, it is characterized in that: described cover core tube body comprises frame of loosing core, core_pulling pole, frame is held up to core, to loose core frame crane, to loose core frame crane locating rack, to loose core skid and core_pulling pole material returned frame, described core_pulling pole is loosed core on frame described in being located at, described to core hold up be set up in described in the loose core rear end of frame slide for described core_pulling pole is held up, described frame crane of loosing core is loosed core below frame for loose core described in holding up frame and described core_pulling pole described in being located at, described frame crane locating rack of loosing core to be loosed core frame crane side described in being located at, described skid of loosing core is located at below described core_pulling pole for reducing resistance during described core_pulling pole poling, to loose core described in the described core_pulling pole material returned is set up in the front end of frame.

4. three line automatic drawing machines according to claim 3, is characterized in that: described in the loose core tail end of frame be provided with tail end fixed mount of loosing core.

5. three line automatic drawing machines according to claim 3, is characterized in that: the front end of described core_pulling pole material returned frame is provided with liftout frame, carry out drawing for pushing in drawing mould after tubing is overlapped core.

6. three line automatic drawing machines according to claim 1, it is characterized in that: described drawing mechanism comprises position-limited rack, mold base, drawing mould, draw trolley, valve, mair motor brake system, two-pass speed-limiting switch and tiltedly jaw type clamp system, described position-limited rack is located at described cover core mechanism front end, described drawing mould is located on described mold base, described drawing mould is bowl-type pattern, described draw trolley is located on the both sides chain of described mainframe, described valve and described oblique jaw type clamp system are for clamping tubing head, described draw trolley is located at described mainframe lower floor for drawing pipes, the inertia that described mair motor brake system is used for described draw trolley is braked immediately.

7. three line automatic drawing machines according to claim 6, it is characterized in that: the rear end of described draw trolley is provided with automatic rise-withdraw fram, described draw trolley is also provided with the direct-connected frame of both sides chain.

8. three line automatic drawing machines according to claim 1, it is characterized in that: described automatic withdrawing mechanism comprises middle splicing frame and finished product rewinding frame, described middle splicing frame is provided with synchronization chain, described synchronization chain adopts flexible plastic cement, the below of described synchronization chain is provided with the cantilever of inclination, described cantilever surfaces is equipped with fexible film, and described finished product rewinding frame is provided with braid over braid.

9. three line automatic drawing machines according to claim 8, is characterized in that: described middle splicing frame side is also provided with receiving station framework, and described receiving station framework adopts wooden structures.

10. three line automatic drawing machines according to claim 8, is characterized in that: described automatic withdrawing mechanism also comprises the running of finished product rewinding frame power and suspender belt self adaptation degree of tightness detection control apparatus.