Method for continuous manufacture of knees pipes and device for its implementation

 

(57) Abstract:

Usage: the invention relates to the field of engineering, and more specifically to a method and apparatus for the production of the tribes of pipes by pulling through the curved section of the mandrel. The inventive feature of the invention lies in the fact that fixing the working position of the mandrel is on the curved portion of the mandrel, and that the power lock device clamp and hold the mandrel by means of smooth V-clamps. The return of the mandrel into position provide axial motion of the power circuit. Positive effect: this invention improves device performance and the quality of the products, to simplify its design compared to the closest analogue and to reduce the energy intensity of the process. 2 S. and 2 C.p. f-crystals, 4 Il.

The invention relates to the field of engineering, and more specifically to a method and apparatus for the production of the tribes of pipes by pulling through the curved section of the mandrel.

There is a method of continuous manufacture of pipe knees, which consists in the fact that the tubular blank is placed on the mandrel with the end of Sogn the bent section, front curved section, it is heated and, pushing through it, bend, expanding the diameter, and cut off at a set length. The mandrel is in a fixed position [1]

The obstacles to achieve the desired technical result when using the known method is that in the known method does not take into account the elongation of the mandrel against the action of tensile force and heat in the process. When heated billet during its transport through the mandrel last gradually heated over its entire length. As the mandrel is of considerable length, and it extends proportional to this length. This leads to the offset bent section and, consequently, to a loss of precision and quality of the pipe lap. No less effect on the elongation of the mandrel exerts a tensile force arising at the push of billets through curved section of the mandrel, because keeping it is for the other end of the power lock mechanism.

A device in the form of a press for the continuous production of tubular knees, containing a mandrel with a curved section at the end, power and fixes the position of the mandrel mechanism is repetitious to achieve the desired technical result when using this known device is that what it does not resolved the issue of compensation elongation of the mandrel against the action of tensile forces and heating, as well as fixing the position and power retaining frame with curved segment is made by two depressions on its surface, located at the beginning of the mandrel and at some distance from it equal to or greater length billets, when the elongation of the mandrel fails in the press. Locking device does not coincide with the hollow mandrel. Increasing the length of the depressions on the mandrel causes a large variation in dimensions of the pipe knees to the decline of their quality.

The known method and device for continuous production of knees pipes, which produce compensating elongation of the mandrel by moving, stopping the clamp and fixing.

The device for continuous production of knees pipe includes a mandrel having a curved section at the output end with the extension diameter, front and rear locking mechanisms for retaining and fixing the position of the mandrel with the control devices of their position relative to the mandrel, a feed source and another procurement mechanisms, heating and cutting device.

This postulate when using the known method and device, taken as a prototype, is that in this method and device for continuous production of pipe knees compensating elongation of the mandrel from heat and acting axial loads in the process is a special tracking mechanism for the return of the mandrel. This return mechanism monitors the position of the locking depression (groove) on the mandrel for power circuit. In the event of displacement of the groove from the nominal position locking the retaining and locking mechanisms are switched off, off specifies the source tube in the zone of the feed mechanism, i.e., the process of manufacturing hollow of the knees is interrupted. Enables the tracking of the return of the mandrel, which brings it back to its original position for the power circuit. After that, the process of manufacturing the knees resumes.

Thus, a method and apparatus for continuous production of pipe tribes adopted for the prototype, have the following disadvantages:

disrupted the continuity of production and operation units;

the system compensate for elongation of the mandrel complicates the design of the device, since it requires a special tracking device and return the mandrel designed solely to provide a power circuit upravljavca in the working position is provided through special grooves and depressions, running on the mandrel, which weakens the frame and requires an increase in its cross-section, and with it the masses; it requires more energy to push through the original pipe blanks on the mandrel as the mandrel is in a suspended position between the pipe and the supporting rollers;

great is the sheer size of the resulting product of the knee due to the fact that fixing the position of a frame is input, the opposite forming portion of the mandrel end, and the elongation of the mandrel when it is not compensated.

The aim of the present invention is to eliminate the above disadvantages of the known method and device adopted for the prototype [3]

The objective is achieved by fixing the working position of the mandrel is not in the troughs of the input end of the mandrel, and curved her site. Clamp and hold the mandrel in position while pushing the billet through its curved section with expanding diameter is not by entering ledge force the locking mechanism into the hollow mandrel, and through its V-clamp. The mandrel in this section of the clamp and hold is smooth without depressions and grooves form. Fixing the working position opria and position of the mandrel and holding the mandrel are separated and performed by two different mechanisms.

Mechanisms for clamping and holding the mandrel is equipped with devices for adjusting the position of the mandrel for locking signals curved plot device.

This can be obtained a single technical result:

improved performance;

increased quality and reduced material consumption of the products obtained;

simplified design of the device;

reduced its energy intensity.

This technical result in the implementation of these inventions on the object the method is achieved in that in the known method of continuous production of tubular knees, at which the mandrel having a curved section with increasing diameter at the output end, enter the original pipe billet, and move on the mandrel, Flex and expand its diameter, alternately clamp and hold the input section of the mandrel in the front and rear parts, carry out the moving source and the filing of the subsequent billets, regardless of the size of the hood and extend the dimensions of the mandrel in the process, fixed working position relative to stationary coordinates machines produced by the curved part of the frame.

Thus, in comparison with the known method of solespace.

According to the invention is fixed relative to the fixed coordinate position forming part of the mandrel, and not auxiliary power lock closure, as in the prototype.

Specified single technical result in the implementation of the method and device object of the device is achieved by the fact that in the proposed device for continuous production of pipe knees, containing a mandrel with a curved section at the output end, working alternately front and rear locking power mechanisms hold the mandrel in the process of working with the regulatory mechanisms of their position relative to the mandrel, gripping and feeding tube-harvesting mechanisms, the locking position of the mandrel mechanism is in the form of sensors, limiting the output of the curved part of the mandrel beyond the working area; the mandrel on the length of the deduction is made smooth without grooves and lugs, and power lock mechanisms in the form of covering the mandrel clamps locked on the body-frame.

The device, in which each one covering a mandrel of the power clamps are made in the form of a wedge clamp sets, with a gap covering the mandrel at some length and consisting of elastic movably mating between what Uta on the body-frame, and lateral spacer faceplates, compression ring and nut-collet embedded in these faceplate of the cylinders.

The device, in which the sleeve-Tsang made on its axis detachable, at least two parts, with each part kinematically connected with its drive cylinder mounted in the body-frame.

In Fig.1 shows a General diagram of the device of Fig.2 section a-a in Fig.1 a view of the rear of the power locking mechanism; Fig.3 section b-b of Fig.2; Fig.4 section G-G in Fig.2.

The device for continuous production of pipe bends. The device comprises a frame 1 with smooth without grooves and lugs inlet pipe 2 and a curved section 3; supporting roller mechanism 4, which simultaneously performs the functions of a feed pipe blanks on the mandrel 1; power lock mechanism: front 5A and 5B rear, and lock mechanism 5 is shorted to the chassis-frame and holds the mandrel 1 in the working position; mechanisms 6 adjusting the position of the mandrel 1 in the work area, through the mechanism 6 will return the mandrel 1 in the working area at the exit; fixing the position of the mandrel 1 in the working area of the mechanism 7; pick up and delivery pipe billet to as position sensors, controlling the position of the curved section 3 in the working position. Each of the power locking mechanism 5 is arranged as follows. Consists of a clamping kit, made of mating movably along a conical surface with a cone angle large angle locking elements: a rigid housing 12 supported by columns 13 frame 14; a thin-walled sleeve of the collet 15, covering the pipe 8 with a gap; lateral spacer platters 16, tightening rods 17 of the cylinders 18, the spring 19 help to release the faceplate 16; plungers 20 are rigidly attached to the rod 17.

Nut-collet 15 is a split of two halves 21 and 22, with each half of the hinge by means of the rod 23 and the axis 24 is connected with its cylinder 25. Disclosure halves 21, 22 and the liberation of the billets produced by the piston 26, and the closure halves of the sleeve by the spring 27.

The mechanism 6 for controlling position of a curved section in the working area is conventionally shown in the form of carvings on the columns 13 and two nuts, the moving body 12 in the desired direction.

The principle of operation of the device.

Original position. All mechanisms and devices lines are included. Power lock 5B are turned on and clamps the mandrel 1. PE and cylinder 25, poluchulki 22 and 21 will cover the frame 1 under the action of springs 27.

2. Apply pressure in the working cavity of the cylinder 18. This faceplate 16, moving towards each other, are affected by the conical surface of the housing 12 on the sleeve-the collet 15 through its halves 21 and 22 and clamp the mandrel 1.

To release the frame 1 remove the pressure switch valve not shown) in the working cavity of the cylinder 18 and allow the pressure in the cavity idling of the same cylinder. Springs 19 help to release the mandrel 1. Then give the pressure in the rod end of the cylinder 25.

When open lock 5A and closed castle 5B roller 4, the mandrel 1 is the next billet-pipe 8. After that, the castle 5A include and clamp them to the frame 1, and the castle 5B off.

Pipe-blank 8 is fed by a conveyor 4 later in the unit 9 capture and supply of pipe-blank for the curved section. Unit 9 takes the tube to the curved section 3 of the mandrel 1 with the necessary bending and pipe expansion effort. Before section 3 of the mandrel tube-blank is heated by the device 10 to a predetermined temperature. The process feed pipe 8 in section 3 of the mandrel is effected continuously. As gathering pipe 8 with teaching the tx2">

As soon as the end of the previous pipe 8 passes castle 5B, the sensor activates and outputs a signal to load the next billet. Billets are in line butt each other.

In the process, the mandrel 1 is extended from the action of tensile forces from the side of the unit 9 capture and feed pipes in the area of bending and pulling, as well as under the influence of the transmission of the temperature from the heating device. Specified elongation of the mandrel to lock the position sensors 7 and produces a signal on the return of the mandrel 1 in the working area. The return of the mandrel 1 can be produced at the time of interception of the clip and open locks 5A and 5B, i.e., without interruption of the process of manufacturing hollow of the knees.

Method for continuous manufacture of pipe tribes is as follows.

A mandrel having a smooth inlet section, alternately pinched front and rear power lock mechanism, and a curved section, performed with increasing size of the cross section at the output, enter the original pipe billet. The input section of the mandrel 1 locking mechanisms 5A and 5B closes on a frame 14 of the machine. The curved section of the mandrel 2 freely supported through the tubular workpiece 8 roll the deposits 5B, after another workpiece 8 is entered, the mandrel 1, the lock 5A is closed and holds the mandrel 1 in the working area, and the castle 5B disclosed and skips the next billet butt of the previous one. Next, the workpiece 8 is captured continuously feed her unit 9. Unit 9 supplies the workpiece to the curved section 2 of the mandrel 1 with the necessary force. At the entrance to the curved section of the pipe workpiece 8 is heated. Next, the workpiece 8 is bent and expanded, acquiring the shape of the curved section 2 of the mandrel. On the frame 1, the received pipe elbow 28 is cut off upon reaching a given size. The process is continuous. While fixing the working position of the frame 1 is made on the curved section.

1. Method for continuous manufacture of pipe tribes, including the introduction and move the original pipes and blanks at the entrance of the mandrel during rotation of the front and rear of the power circuit of the input section of the mandrel to the body-frame, then move the blanks on the freely supported output curved section of the mandrel is made with an increasing diameter, fixing the working position of the mandrel relative to the body-frame and its return to its working position, is great for izvodyat axial motion of the power circuit.

2. Device for the continuous production of tubular knees, containing the body-frame, a mandrel having an input section with front and rear power lock mechanisms of its closure on the body-frame, freely supported on support rollers output curved section, performed with the increase of its diameter, the mechanism of fixing the working position of the mandrel communicating with the return mechanism of the mandrel to the position of the gripper and feed the workpiece into a curved section, wherein the mechanism for fixing the working position of the mandrel in the form of position sensors mounted on the curved section of the mandrel, thus, the mechanism of the return made in the form of means of adjustment of the axial position of the power locking mechanisms.

3. The device according to p. 2, characterized in that the inlet section of the mandrel is made of a smooth, with power locking mechanisms made in the form of covering the mandrel clamps.

4. The device according to p. 2 or C, characterized in that the power locking mechanisms made in the form of covering the mandrel conical wedge clamps.

 

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