JPH07195227A - Pipe working device - Google Patents

Abstract

PURPOSE:To provide a structure of a device of a very simple constitution in which a pipe can be penetrated, to enble the drawing and cutting work of the pipe to be performed in an arbitrary position other than the pipe end, and also to enable the drawing work to pipes of miscellaneous noncircular sectional shapes and to curved pipes. CONSTITUTION:At the time of working, the outside hollow body 7 that has been fitted to an inside hollow body, 2 is rotated slightly faster than the inside hollow body 2, and also at the time of the completion of working, it is rotated at the same rotating speed. On the end surface of the two hollow bodies 2 and 7, both ends of a link mechanism E are pivoted in the respective positions divided into three equal parts on a circumference, and a pipe working means 16 is pivotally fitted to each lever 11 on the side of the inside hollow body 2 of the link mechanism E, and also it is energized to the outside hollow body 7 side by means of a spring 18, and further a pipe-retaining member is provided to the front of the link mechanism E.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe processing apparatus,
It is mainly used for forming a local drawing, a pattern, etc. on a pipe for various machine structures, piping, and architectural decoration, and for cutting the pipe.

[0002]

2. Description of the Related Art As a conventional device of this type, for example, one disclosed in Japanese Patent Laid-Open No. 4-339527 is known. In the disclosed device, a plurality of profile rolls that are orbiting radially inward are pressed against the outer periphery of the tip end portion of the pipe to be processed fixed by the pipe holding device, and the pipe is plastically processed with an arbitrary profile. Has been applied. In this case, the profile roll is supported by the shaft at the tip of the rocking body whose base end is pivotally supported by the fixed shaft with respect to the rotating body that is driven to rotate. By applying a cam force from the side to the cam follower of the shaft of each rocking body, the profile roll for rotating the rocking body is displaced radially inward.

[0003]

However, the conventional configuration has the following problems. a. The structure is extremely complicated due to the large number of parts that make up the device. b. Since the pipe is configured so that it cannot be inserted in the axial direction within the device, the processing portion for the pipe is limited to the pipe end. For this reason, it becomes impossible to perform processing such as drawing and cutting at arbitrary positions of the pipe, and it is impossible to perform a plurality of processing in the length direction of the long pipe. c. Due to the structure of the pipe holding portion and the processing portion main body, it is not possible to perform drawing on a deformed pipe having a non-circular cross section or a curved pipe.

The present invention has been made in view of these circumstances, and has an extremely simple structure of the apparatus that allows a pipe to be inserted therethrough, and is capable of squeezing or cutting at any position other than the pipe end. Another object of the present invention is to provide a pipe processing apparatus capable of drawing a deformed pipe having a non-circular cross section or a curved pipe.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, in which an inner hollow body is rotatably held in a casing of a support and a gear is provided at one end of a protruding portion from the casing. Is fixed, the outer hollow body is rotatably held on the outer peripheral portion of the other end of the inner hollow body protruding from the casing, and a gear is fixed to one end on the casing side, and each gear of the outer and inner hollow bodies is The outer hollow body is connected to each gear series with an electromagnetic clutch that rotates at a higher rotational speed than the inner hollow body, and there are three sets of link mechanisms consisting of a lever and a crank. Of the link mechanism is pivotally attached to each set position divided into three parts on the circumference in the end face, and each lever of the link mechanism is pivotally attached to a pipe processing means such as a profile roller or a circular blade at an intermediate portion. Both ends are connected to a spring held by an outer hollow body, and a pipe holding member for preventing rotation of the pipe is provided in front of the end faces of the two hollow bodies to which the link mechanism is attached, and the outer hollow body is an inner side. The invention relates to a pipe processing apparatus, wherein each pipe processing means of the link mechanism is pressed by the pipe held by the pipe holding member when rotated faster than the hollow body.

When it is desired to easily position the processing position of a long pipe, the gear side of the inner hollow body having the above-mentioned structure is provided.
The pipe feeding device driven by the pulse motor may be provided.

[0007]

When the motor is driven while the electromagnetic clutch is connected and the outer hollow body is rotated at a rotation speed higher than that of the inner hollow body, the gap between both ends of the link mechanism becomes longer and the opening angle of the link mechanism becomes larger. Along with this movement, the pipe processing means held by the lever of the link mechanism is pressed against the surface of the pipe to form a drawing or a pattern on the pipe or cut the pipe. When the connection by the electromagnetic clutch is released after processing, the two hollow bodies are rotated at the same speed,
The pipe processing means is stopped from being pushed. Next, the opening angle of the link mechanism is reduced by the centrifugal force acting on the link mechanism and the biasing force of the spring to return to the initial state before processing, and the pipe processing means is separated from the pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. 1 and 2 are a side view and a plan view of the entire pipe processing apparatus according to the present invention. The pipe processing apparatus is roughly divided into a pipe processing unit A, a rotation drive unit B, and a pipe holding unit C or a pipe holding unit C and a pipe feeding unit D.

In the pipe processing portion A on the support base 1, the inner hollow body 2 is held horizontally in the casing 3 by the bearings 4 and 4, and the screw 6 is attached to one of the tips protruding from the casing 3. , 6 fixes the gear 5 (see FIG. 3). Reference numeral 7 denotes an outer hollow body having an inner diameter larger than the outer diameter of the inner hollow body 2, and the outer hollow body 7 is rotatably held by bearings 8 on the other end outer peripheral portion of the inner hollow body 2 protruding from the casing 3. The gear 9 is fixed to one end of the casing 3 by screws 10 and 10.

The inner hollow body 2 has a slightly larger outer diameter at a portion supporting the outer hollow body 7 than a portion inside the casing 3, and the outer hollow body 7 has an outer diameter on the side where the gear 9 is not attached. It is formed larger than the outer diameter of the side.

Three sets of link mechanisms E including a lever 11 and a crank 12 are attached to the end faces of the two hollow bodies 2 and 7 on the side where the outer diameter is large (lever 1).
1 may be replaced by a dogleg-shaped lever 11A shown in FIG. 7). Each link mechanism E is formed by pivotally connecting a pair of parallel levers 11, 11 spaced apart and a crank 12 sandwiched between the levers 11, 11 with a pin 13. One end of is attached rotatably by a lever attachment shaft 14 to each of three equally divided positions on one circumference in the end face of the inner hollow body 2 (see FIGS. 5 and 6).

On the other hand, one end of each crank 12 is set at each of the three equally divided positions on one circumference in the end face of the outer hollow body 7 and at each of the three equally divided positions of the inner hollow body 2. The link mounting shaft 15 is rotatably mounted so as to form a central angle.

A pipe processing means 16 such as a profile roller or a circular blade is rotatably held by an intermediate shaft 17 at an intermediate portion of each lever 11 of the link mechanism E. Reference numeral 18 denotes a spring, one end of which is locked to the end surface of the outer hollow body 7, and the other end of the spring 18 has the pipe processing means 1
The levers 11 and 11 are located closer to the crank 12 than 6 to apply an urging force to the link mechanism.

Reference numeral 32 denotes an adjustable stopper which regulates the pushing amount of the pipe processing means 16. When the movement of the lever 11 is stopped by the stopper 32, the electromagnetic clutch 25 described later is turned off to process the pipe 29. Stop.

FIG. 4 shows a drive mechanism of the rotary drive unit B. The gear 9 of the outer hollow body 7 meshes with the gear 21 of the gear shaft 20 via the intermediate gear 19. Further, the gear 5 of the inner hollow body 2 is connected to another gear shaft 2 via the intermediate gear 22.
3 meshes with the gear 24. In this case, the rotation speed of the outer hollow body 7 by the gear series 9, 19, 21 is set to be higher than the rotation speed of the inner hollow body 2 by the other gear series 5, 22, 24 by the set rotation speed. It

The gear shafts 20 and 23 are independent, and both gear shafts 20 and 23 are connected by an electromagnetic clutch 25.
Disconnected. The rotation of the motor 26 is transmitted to the pulley 28 attached to the gear shaft 23 via the V belt 27. Reference numeral 36 is a meter relay connected to the electromagnetic clutch 25 and the motor 26, and when the motor 26 is overloaded, issues an off command to the electromagnetic clutch 25 to disconnect the gear shafts 20 and 23.

Therefore, when the motor 26 is driven with the electromagnetic clutch 25 turned on and the gear shafts 20 and 23 are connected, the outer hollow body 7 is rotated faster than the inner hollow body 2 by the set rotational speed. It On the contrary, when the motor 26 is driven with the electromagnetic clutch 25 turned off and the connection between the gear shafts 20 and 23 is released, the outer hollow body 7 in which the rotation of the motor 26 is not transmitted has three sets. It is rotated in the same direction as the inner hollow bodies 2 connected by the link mechanism E at the same rotation speed.

A pipe holding member 30 for blocking the rotation of the pipe 29 for positioning is provided in front of the end face side where the link mechanism E is mounted. Pipe holding member 30
The clamp part has the same shape as the cross section of the pipe 29 to be processed, and in the case of a deformed pipe having a non-circular cross section, the clamp part is replaced with the clamp part having the cross section. Reference numeral 31 is a moving means connected to the pipe holding member 30, and is a pipe holding member 3
Positioning of 0 and movement of the pipe 29 in the lateral direction with respect to the longitudinal direction are performed by the moving means 31.

In front of the gear 5 side of the inner hollow body 2, a pipe feeding device 33 driven by a pulse motor 35 is provided. The pipe feeding device 33 is the pulse motor 3
5 regulates the feed amount of the pipe 29. The feed roller 34 of the pipe feeding device 33 is replaceable, and is replaced with a roller having a shape matching the sectional shape of the pipe 29 to be processed.

In FIGS. 1 and 2, 37 is an operation panel,
38 is a control panel and 39 is an inverter.

Next, the operation of the apparatus will be described. When processing a relatively long straight pipe 29, the pipe 29 is set by holding the pipe 29 in which the inner hollow body 2 is inserted by the pipe feeding device 33 by the pipe holding member 30.

The pipe 29 is processed by driving the motor 26 with the electromagnetic clutch 25 turned on. In the state where the electromagnetic clutch 25 is turned on, the gear shaft 20 on the outer hollow body 7 side is connected to the gear shaft 23 on the inner hollow body 2 side, and the outer hollow body 7 rotates at a speed set by the inner hollow body 2. It is rotated in the arrow direction as fast as possible.

When the outer hollow body 7 is rotated ahead of the inner hollow body 2, the crank 12 whose one end is connected to the outer hollow body 7 has the other end of the lever 11 which is connected to the inner hollow body 2 at one end. Pull the end and pull the lever 11 to the spring 18
It rotates around the lever mounting shaft 14 against the biasing force of.

With the rotation of the lever 11, the pipe processing means 16 held by the lever 11 is moved to the pipe 29 while revolving around the pipe 29, and after coming into contact with the surface of the pipe 29, 29 pushing the pipe 29
Is pressed inward from the outer diameter of the pipe to process the pipe 29. In this case, when a profile roller is used for the pipe processing means 16, a pipe drawing or pattern is formed according to the width dimension and edge shape of the profile roller, and when a circular blade is used for the pipe processing means 16, the pipe is processed. It functions as a cutter and cuts the pipe 29.

When the lever 11 comes into contact with the stopper 32 provided on the end surface of the inner hollow body 2 and the pushing into the pipe 29 is stopped, the load of the motor 26 increases and the motor 2
Since the current flowing through 6 becomes excessively large, an off signal is output from the meter relay 36 that detects this to the electromagnetic clutch 25, and the processing on the pipe 29 is completed.

When the electromagnetic clutch 25 is turned off, the rotation of the motor 26 is not transmitted to the gear shaft 20 on the outer hollow body 7 side. Therefore, the outer hollow body 7 connected to the inner hollow body 2 by the three sets of link mechanisms E. Are rotated integrally with the inner hollow body 2. During this rotation, the centrifugal force and the urging force of the spring 18 act on the lever 11 and the crank 12, so that the link mechanism E is automatically returned to the state before pipe processing. Along with this, the pipe processing means 16 held by the lever 11
From the position where it was pushed into the pipe 29
It is moved to the outside and ready for the next processing.

Next, when processing a relatively short pipe, the use of the pipe feeding device 33 is omitted, the pipe is held by the pipe holding member 30, and the tip side of the pipe is positioned at the processing position in that state. The same processing as described above can be performed by operating the device.

The apparatus of the above embodiment can also be used for drawing a so-called deformed tube whose cross section is not circular. In this case, the feed roller 34 of the pipe feeding device 33 and the clamp portion of the pipe holding member 30 may be replaced with those having the same shape as the cross section of the pipe to be processed.

Further, the apparatus of the above embodiment is not limited to the processing of the straight pipe 29, but the inner hollow body 2
It can also be used for processing a curved tube 29a (see FIG. 2) that can be inserted into the inside. In this case, the pipe feeding device 33 and the pipe holding member 30 are moved to a position suitable for holding the curved pipe 29a.

In the apparatus of the above embodiment, the inner hollow body 2 and the outer hollow body 7 are driven by the electromagnetic clutch 25 and the motor 26, and the gear shafts 23, 20 of the inner hollow body 2 and the outer hollow body 7 are driven. Even if each of the servo motors is connected to and the speed of each servo motor is controlled in the same manner as when the electromagnetic clutch 25 and the motor 26 are used, the same machining as in the above embodiment can be performed.

Further, as shown in FIG. 8, the pipe processing means 16 has a profile roller 1 inclined with respect to the intermediate shaft 17.
When 6A is used, since the pipe 29 can be processed while applying a thrust, it is possible to give the pipe 29 a throttle having a constant diameter or a tapered throttle.

[0032]

Since the present invention is configured as described above, it has the following effects.

(1) In the pipe processing apparatus according to the first aspect, when the outer hollow body is rotated faster than the inner hollow body by a set rotational speed, the link mechanisms mounted on the end faces of these hollow bodies are rotated. Since each pipe processing means is gradually pressed by the pipe held by the pipe holding member, not only the pipe processing device can be made extremely simple in structure, but also a precise drawing or pattern can be formed on the pipe, It can be cut. (2) If the clamp portion of the pipe holding member is replaced with a suitable one for holding a deformed pipe, not only the pipe having a non-circular cross section can be processed in the same manner, but also a part of the deformed pipe is partially cut. It is also possible to create a special tube with a circular section.

In the pipe processing apparatus according to the second aspect, since the pipe feeding apparatus driven by the pulse motor is provided on the gear side of the inner hollow body of the apparatus having the configuration according to the first aspect, By moving the pipe inserted in the hollow body in the length direction, it is possible to form a diaphragm or a pattern at an arbitrary position of the long pipe or cut the pipe. Also, since the pipe is processed while holding both sides of the processed part, not only the processing accuracy improves, but also
Even a flexible pipe can be processed without damaging the pipe.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a vertical cross-sectional view showing a combined state of an inner hollow body and an outer hollow body.

FIG. 4 is a perspective view showing a transmission relationship between an inner hollow body and an outer hollow body.

FIG. 5 is a front view showing an attached state of the link mechanism.

FIG. 6 is a cross-sectional view showing a configuration of a link mechanism.

FIG. 7 is a front view showing another embodiment of the link mechanism.

FIG. 8 is a sectional view showing another embodiment of the pipe processing means.

[Explanation of symbols]

 1 Support 2 Inner Hollow Body 3 Casing 5,9 Gear 7 Outer Hollow Body 11 Lever 12 Crank 16 Pipe Processing Means 18 Spring 25 Electromagnetic Clutch 29 Pipe 30 Pipe Holding Member 31 Moving Means 33 Pipe Feeder 35 Pulse Motor E Link Mechanism

Claims (2)

[Claims] 1. The inner hollow body is rotatably held in a casing of a support base, and a gear is fixed to one end of a protruding portion from the casing, and the outer hollow body is the other end of the inner hollow body protruding from the casing. It is rotatably held on the outer periphery, and a gear is fixed to one end on the casing side.Each gear of the outer and inner hollow bodies has an electromagnetic clutch that rotates the outer hollow body at a higher rotational speed than the inner hollow body. The three sets of link mechanisms, which are connected to each gear series and consist of a lever and a crank, are arranged so that both ends of the lever and the crank are respectively pivoted to three set positions on the circumference within the end face of the inner and outer hollow bodies. Each lever of the link mechanism is pivotally mounted with a pipe processing means such as a profile roller or a circular blade at an intermediate portion, and one end of the lever is connected to a spring held in an outer hollow body. The pipe holding member that prevents the rotation of the pipe is provided in front of the end faces of the two hollow bodies to which the link mechanism is attached, and when the outer hollow body is rotated faster than the inner hollow body, each pipe processing of the link mechanism is performed. A pipe processing apparatus characterized in that the means is pressed against the pipe held by the pipe holding member. 2. The inner hollow body is rotatably held in a casing of a support base, and a gear is fixed to one end of a projecting portion from the casing, and the outer hollow body is the other end of the inner hollow body projecting from the casing. It is rotatably held on the outer periphery, and a gear is fixed to one end on the casing side.Each gear of the outer and inner hollow bodies has an electromagnetic clutch that rotates the outer hollow body at a higher rotational speed than the inner hollow body. The three sets of link mechanisms, which are connected to each gear series and consist of a lever and a crank, are arranged so that both ends of the lever and the crank are respectively pivoted to three set positions on the circumference within the end face of the inner and outer hollow bodies. Each lever of the link mechanism is pivotally mounted with a pipe processing means such as a profile roller or a circular blade at an intermediate portion, and one end of the lever is connected to a spring held in an outer hollow body. The pipe holding member for blocking the rotation of the pipe is provided in front of the end faces of the two hollow bodies to which the link mechanism is attached, and the pipe feeding device driven by the pulse motor is provided on the gear side of the inner hollow body. A pipe processing apparatus, wherein each pipe processing means of a link mechanism is pressed against a pipe held by a pipe holding member when the outer hollow body is rotated faster than the inner hollow body.