JP2681746B2 - Electric pipe tip processing machine and pipe clamp device used for this - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pipe tip processing which facilitates swaging and flat processing including flare processing of a pipe end necessary for connecting various pipes including an air conditioner. The present invention relates to a machine and a pipe clamp device used for the machine.

[0002]

2. Description of the Related Art Conventionally, as a means for connecting a valve and a pipe in an air conditioner and various other pipes, the tip of the pipe is formed into a flare, and the flare portion is formed in a tapered shape. Including the method of applying pressure to the flow port with a flare nut,
A swage (expansion) process is applied to the pipe tip, and another pipe is inserted into this swage part and fixed and connected. A flat (flange) process is applied to the tip of the bellows-shaped flexible pipe. Various connecting means such as a method of connecting and fixing to another pipe by using a flat portion are adopted.

In flare molding among the various shapes of the pipe tip, a cone holder having a cone eccentrically provided at the tip, as shown in Japanese Utility Model Publication No. 52-53, is used with a screw. Then, a manual flare forming tool has been widely used, which is manually rotated and a clutch works when the flare forming of the pipe tip is completed. However, with the above-mentioned manual flare forming tool, a great burden is imposed especially on the hand during flare processing, and it has been impossible to perform flare forming processing on a large number of pipes.

Therefore, a gun grip type electric flare tool disclosed in Japanese Patent Laid-Open No. 3-268827 has been developed as a method for electrically flaring the tip of the pipe. This electric flare tool uses a battery-powered small motor to reduce the rotation of the motor with a plurality of gears to drive a rotary drive shaft with an eccentric cone fixedly mounted on the drive shaft. The screw shaft member can be moved back and forth by screwing with the female screw portion of the main body via, and an elastic member is interposed between the screw shaft member and the rotation drive shaft. It is driven by a seesaw type push button switch that can rotate the motor forward and backward, and when flare processing is completed, the clutch is operated to control flare processing.So to speak, rotation of conventional manual flare processing machine Is only electrically driven by using a motor and a gear reducer. Also, the clamp means for the pipe to be processed is of a separate screw tightening type, and the pipe is positioned by bringing the tip of the pipe into contact with a positioning plate whose one end is swingably fixed. After sandwiching it, it is fixed to the tip of the flare processing machine.

Further, in swaging the tip of the pipe, as shown in US Pat. No. 2,493,127, a shaft working tool for swaging is pressed into the end of the pipe by a screw mechanism. is there.

Further, when flattening the end of the bellows-shaped flexible pipe, as shown in Japanese Utility Model Publication No. 61-38735, a pair of rollers having inclined surfaces for flattening are screwed together. With a form of turning,
Before that, there is a form in which a short-axis processing tool having a collar is advanced by a screw shaft.

[0007]

However, the conventional electric flare processing machine has various problems as described below. (1) It is necessary to keep pressing the push button switch during the work, which is very tiring when working in an unreasonable posture. (2) If the push button switch is released midway, it will stop, so if it stops during flare processing, the flare portion will have an uneven shape even if it is re-rotated, and this may cause leakage. (3) Since the cone feed is of the screw type, only constant torque can be produced at a constant speed not only during flare processing but also during retreat.
Since it requires a motor with a large torque, it consumes a large amount of power and is wasteful. (4) Since the screw is driven electrically, it is necessary to apply a clutch to protect the screw both when the cone moves forward and backward.
The life of this type of clutch is about 5000 times, which is problematic in durability. (5) Further, for fixing the pipe to the flare processing machine, the tip of the pipe is previously fixed by a separate screw tightening type clamp device, and then this clamp device is fitted with the end part of the flare processing machine. Since it is a form of locking, it is inconvenient to screw and fix the pipe to the clamp device. (6) Furthermore, since the positioning of the pipe tip is performed by the positioning plate with one end fixed, this positioning plate also greatly projects to the opposite side, and if this plate portion is not always positioned above during the work. did not become.

The configurations shown in the above-mentioned US Pat. No. 2,493,127 and JP-B-61-38735 are all based on a manual screw propulsion mechanism.
The work efficiency was poor.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and an eccentric cam is arranged rearward on the axis of a cone holder so that the cone can be moved efficiently. Therefore, for example, the idle transfer before machining is fast, the pipe tip is slowed down to obtain a large torque, and the backward movement after machining is accelerated.
It is characterized in that the cycle process is performed by operating one push button. Regarding the means for fixing the pipe tip to the pipe tip processing machine,
The present invention is characterized in that a separate clamp device capable of easily fixing the pipe tip end portion by a clamp lever is configured to be locked easily and surely on the sleeve tip end portion of the case body by the spigot fitting.

That is, the electric pipe tip processing machine according to the present invention includes a first driven shaft 6 having a gear 7 to which the rotation of the motor shaft 1 is decelerated and transmitted by a planetary gear device 5 arranged in front, Wide gear 8 meshing with the gear 7 of the first driven shaft
Second driven shaft 10 having a front part and a worm 9 at the rear part
A worm gear 11 arranged in parallel with the first driven shaft 6 and meshing with the worm 9, and a worm gear shaft 12 provided in a direction orthogonal to the second driven shaft 10 having an eccentric cam 13 on its side portion, A compression coil spring 17 is provided in the holder booth 16 in front of the eccentric cam 13 so that the eccentric cam 13 can be constantly operated.
A follower holder 14 having a cam follower 15 that is pressed against and slidably mounted on the follower holder, and a rear end portion of a processing tool holder having various processing tools at its tip end is rotatably held by the follower holder 14 and a front end portion thereof. The case body 3
5, a sliding gear 25, which is held so as to be rotatable and slidable in the front-back direction through a sleeve 23 provided on the workpiece 5, and which engages with the wide gear 8 in the central portion of the processing tool holder 18, is eccentric by the rotation of the motor 3. The electric pipe tip processing machine is characterized in that the processing tool is rotated back and forth by one rotation of the cam 13.

Further, the pipe clamp device processed by the electric pipe tip processing machine according to the present invention is provided with semi-circular clamping surfaces 41 and 42 for clamping the pipe 39 which is the workpiece at the center upper part, and one end thereof. Is a pair of openable and closable clamp devices which are rotatably supported by a shaft 45 and fixed at the other end by a clamp lever 47 via an arm 46. One side edge of the circular clamping surface is formed in a tapered shape 52, and a ring hole 53 having a diameter larger than the diameter of the pipe 39 is formed on the outer side surface thereof, and the ring hole 53 has an inner diameter equal to the outer diameter of the pipe. A free ring 56 having a larger diameter and an outer diameter smaller than the inner diameter of the ring hole 53 is movably loaded so as to block a part of the circular holding hole formed by the two holding surfaces 41 and 42 having a semicircular shape. , Flange 54 on the outside A pipe clamp device mounted to the flaring machine, characterized in that a spigot portion 55 through.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a flare processing machine among the pipe tip processing machines according to the present invention will be described in detail below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a motor shaft of a motor 3 which is rotated by a battery 2, and the motor shaft 1 is connected to a first driven shaft 6 having a gear 7 via a planetary gear device 5 arranged in a gear case 4. Slowed down and transmitted.

Above the first driven shaft 6, a wide gear 8 is provided on the front side, and a second driven shaft 10 is provided with a worm 9 on the rear side.
Are provided in parallel in a rearward extension shape, and mesh with the gear 7 in front of the first driven shaft 6 and the gear 8 of the second driven shaft 10.

Further, the worm 9 behind the second driven shaft 10
The gear is engaged with a worm gear 11 arranged above it, and the rotation is transmitted to the worm gear shaft 12 provided in the direction orthogonal to the second driven shaft 10 at a reduced speed.

An eccentric cam 13 is attached to the worm gear shaft 12.
Is fixed, and a cam follower 15 by a bearing, which is slidably held in a holder booth 16 by a follower holder 14, is urged rearward by a compression coil spring 17.

Reference numeral 18 denotes a large diameter portion 1 at the tip of the follower holder 14, which is provided in front of the follower holder 14 so as to be rotatable and slidable in the front-rear direction.
In the processing tool holder having 9, a cone 20 is provided on the front surface of the large diameter portion 19 at the tip of the processing tool holder so as to be rotatable by a needle bearing 21 while being inclined at a constant angle like the conventional product. Is held on the case body 35 via another needle bearing 22 and a sleeve 23, and the rear end of the processing tool holder 18 is rotatably held on the follower holder 14 via a bearing 24.

At the center of the processing tool holder 18, a sliding gear 25 that meshes with the wide gear 8 of the second driven shaft 10 is provided between the rear surface of the large diameter portion 19 and a strong compression coil spring 26. The sliding gear 25 is slidably mounted on the inner surface of the bearing 24 and the rear surface of the sliding gear 25.
A cylindrical spacer 27 is provided between the cam follower 15 and the rear part of the inner 28, which is fixed by a stopper 29 screwed to the rear surface of the tool holder 18.
The processing tool holder 18 also moves back and forth according to the movement of the tool.

Reference numeral 30 denotes a switch restricting plate provided on the side surface of the eccentric cam 13. As shown in FIG. 6, an operating plate 32 of a micro switch 31 provided at the rear of the switch restricting plate 30 is provided on the outer surface thereof. It is arranged so that it touches,
Due to the presence of the switch regulation plate 30, the rotation of the motor 3 necessary for flare processing cannot be obtained only by momentarily pressing the drive switch 33 of the motor 3.

When the drive switch 33 is continuously pressed for 2 to 3 seconds, the operating plate 32 is disengaged from the switch restricting plate 30 and the actuator 34 of the micro switch 31 projects as shown in FIG. The cam 13 is rotated once to automatically stop.

As shown in FIGS. 4 and 5, the eccentric cam 13 has a T from the starting point S at the start to the first rotation angle of 45 °.
In the section (blank feed), slowly move the cone holder 18 only 3
mm forward, and in the U section of 45 ° to 225 ° (flare processing section of pipe), further slowly move 3.5 mm forward and 2
The V section of 25 ° to 285 ° (when flare processing is completed) idles at that position for a while, and the W section of 285 ° to 330 ° (return) makes a quick return, and the last 330
In the X section from ° to 360 °, the motion of idling a little at the start position is defined as one cycle, and this motion is performed by the eccentric cam 1.
It is done in one rotation of 3.

The rotation of the eccentric cam 13 is a few seconds (2 to 3) at the initial start due to the action of the switch regulating plate 30 described above.
The motor 3 does not automatically operate unless the drive switch 33 is continuously pressed for 2 seconds). A spigot portion 36 is formed at the tip of the sleeve 23 that holds the processing tool holder 18, and a spigot portion 55 formed in a clamp device for a flare-processed pipe, which will be described later, is fitted therein. There is.

[0022]

[Operation of flare processing machine] When the drive switch 33 of the motor 3 is continuously pushed for 2 to 3 seconds, the rotation of the motor shaft 1 is transmitted to the first driven shaft 6 via the planetary gear unit 5, and this rotation is transmitted to the gear 7. Is transmitted to the worm gear shaft 12 via the wide gear 8, the second driven shaft 10, the worm 9, the worm gear 11, etc., and the eccentric cam 13 is rotated by the rotation of the worm gear shaft 12. At the same time, the rotation of the wide-width gear 8 of the second driven shaft is transmitted through the sliding gear 25 to the processing tool holder 1
Rotate 8.

As shown in FIG. 6, the rotation of the eccentric cam 13 rotates while the operating plate 32 of the micro switch 31 is away from the operator 34, and the eccentric cam 13 makes one rotation and the operating plate 3 rotates.
2 automatically stops by pushing the actuator 34 as shown in FIG.

When the processing tool holder 18 is moved forward, since the eccentric cam 13 disposed behind the central axis of the processing tool holder is driven, the processing tool holder is not twisted and flare processing is accurately performed. I can do it.

Therefore, the eccentric rotation and reciprocating motion of the cone 20 by one rotation of the eccentric cam 13 can flare the tip of the pipe fixed to the front of the case body 35 via the pipe clamp device 40.

[0026]

[Structure of Pipe Clamping Device] FIGS.
FIG. 7 is a clamp device for fixing a pipe, which is fitted on the tip of the sleeve 23 provided on the front surface of the main body case 35, FIG. 7 is a front perspective view when the clamp is opened, and FIG. 8 is a rear perspective view of the same.

As shown in FIGS. 7 to 9, the pipe clamp device 40 includes a pair of upper and lower holders 43 and 44 having semicircular clamping surfaces 41 and 42 for clamping the flared pipe 39 at the upper and lower portions of the central portion. Axial support 4 with one end rotatable about 120 °
The open portion at the other end is clamped and fixed by an L-shaped clamp lever 47 via an arm 46 provided at the tip of the upper holder 43.

That is, a clamp jaw 58 is provided at the lower open end of the lower holder 44 so that the height thereof can be adjusted, and a locking pin is provided at the open end of the other upper holder 43 at the tips of two parallel arms 46. 48, the rear end of the arm 46 is rotatably supported by the corner of the L-shaped clamp lever 47, and the tip of the short side of the clamp lever is in front of the center of the open end of the upper holder 43. A shaft support plate 50 provided on the shaft support 51 is rotatably supported.

A tapered portion 52 is formed at the rear edge of the circular clamping surface formed by the semicircular clamping surfaces 41, 42 of the pipe clamp device, and is integrated with the lower holder 44 behind it. A ring hole 53 having a diameter larger than the outer diameter of the pipe 39 is formed between the ring hole 53 and the flange 54 provided on the
On the rear surface of the flange 54, there is provided an inlay portion 55 which can be fitted to the inlay portion 36 of the sleeve 23 on the case body side.

Reference numeral 56 in FIGS. 7, 9 and 10 denotes a free ring loaded in the ring hole 53. The free ring 56 has an inner diameter of the pipe 3 as shown in FIGS.
9 is a plate-shaped ring having a larger diameter than the outer diameter of 9 and an outer diameter smaller than the inner diameter of the ring hole 53, and when the pair of upper and lower holders 43, 44 are inserted into the ring hole 53 and the upper and lower holders 43, 44 are closed,
A part of the inner circumference is closed except for the central portion of the circle formed by.

The free ring 56 is not limited to the plate shape as described above, and depending on the size of the pipe, a cylindrical ring is formed on one surface of the plate-shaped outer peripheral portion as shown at 56a in FIG. In some cases, it may be integrally provided.

In the figure, reference numeral 57 is a pin for preventing the free ring 56 from coming off, which holds the free ring 56 by inserting it after inserting it into the ring hole 53 of the lower holder 44 so that the free ring does not come off from the ring hole. Is.

[0033]

[Operation procedure of pipe clamp device]

(1) With the upper holder 43 open upward as shown in FIG. 7, the tip of the pipe 39 as the workpiece is brought into contact with the free ring 56 as shown in FIG.
3 is closed as shown in FIG. (2) Next, the pin 48 at the tip of the arm 46 is turned below the clamp jaw 58 on the lower surface of the lower holder, and the rear end of the crank lever 47 is moved from the state of the chain double-dashed line in FIG. By pushing the pipe 39 until it hits the upper surface of the pipe 39, the toggle mechanism of the clamp lever 47 and the arm 48 securely fixes the pipe 39 in a state where the tip end is accurately positioned. (3) Next, a pipe clamp device 40 holding the pipe
1 to 3, the driving switch 33 is pushed for 2 to 3 seconds in a state where the spigot portion 55 is fitted and fixed to the spigot 36 formed on the sleeve 23 on the main body of the flare processing machine. As cone 20
Since it moves back and forth while rotating, the tip of the pipe can be flared into a predetermined shape.

When the cone 20 is rotated and moved back and forth,
The cone 20 is in contact with the free ring 56. Since the free ring 56 is formed with a diameter smaller than the ring hole 53, the free ring 56 freely rotates so as to be swung by the swinging rotation of the cone 20. It does not hinder the flare processing.

12 and 13 show a processing tool holder 60 and a pipe clamp device 67 for swaging the tip of the pipe. The basic shape of the processing tool holder 60 is the flare except for the tip. It is the same as the processing tool holder 18 for a processing machine, and instead of the cone 20 provided in an inclined shape at the tip of the processing tool holder 18, a processing member 66 for swaging through a ball 63 at the center of the tip.
Is rotatably provided.

That is, a hemispherical recess 61 is provided at the center of the tip of the processing tool holder 60, and a ring-shaped groove 62 is provided at the outer periphery of the tool holder 60. The hemispherical recess 61 is provided with a ball 63 at the center of the rear end. The ring-shaped leg portion 65 of the swaging member 66 having the ball receiving hole 64 and the ring-shaped leg portion 65 on the outer periphery thereof is rotatably provided in the ring-shaped groove 62.

On the other hand, the pipe clamp device 67 has the same form as the pipe clamp device 40 for the flare processing machine as the clamp mechanism, but the free ring 56 is fitted by widening the width of the pair of upper and lower holders. A ring-shaped recess 68 required for swaging is formed between the ring hole 53 and the ring hole 53.

Therefore, when the processing tool holder 60 is moved to the left, the tip of the processing member 66 for swaging advances so as to spread the tip opening of the pipe 39, as shown in FIG. Expand the department. At this time, since the processing member 66 and the processing tool holder 60 are rotatably provided even when the processing tool holder 60 moves forward while rotating, the tip of the processing member 66 is press-fitted into the tip opening of the pipe 39. Due to the resistance at the time, the processing member 66 does not rotate and advances in that state.

FIG. 14 and FIG. 15 show a tool holder 7 for flattening the tip of the bellows-shaped flexible pipe 69.
0 and the pipe clamp device 72. The basic shape of the processing tool holder 70 is the same as that of the processing tool holder 60 for swaging, and the ball 6 is provided at the center of the tip.
The processing member 71 for flat processing is rotatably provided with the same structure as that of the processing member 66 for swaging processing through the above-mentioned structure.

Regarding the pipe clamping device 72 for flattening, the bellows-like flexible pipe 6 which is the workpiece is used.
9 is provided, that is, a ring-shaped inner collar 74 that fits into the ring-shaped recess 73 of the bellows portion is provided on the rear surfaces of the pair of upper and lower holders as shown in the figure, and the inner collar 74 can be bellows-shaped. The flexible pipe 69 is sandwiched.

Therefore, when the processing tool holder 70 is moved to the left, the tip of the processing member 71 for flat machining causes the tip of the bellows-like flexible pipe 69 to move to the rear surface of the pipe clamp device 72 as shown in FIG. It is pressed against and crushed to form a flat brim.

[0042]

According to the present invention, the center of rotation of the eccentric cam for sliding the work tool holder is arranged rearward on the axis line of the work tool holder, so that the work tool holder is not twisted, and a small horsepower motor is used. The pipe tip can be efficiently processed. In addition, the pipe tip can be processed into various shapes by exchanging the processing tool holder and the pipe clamp device according to the processing form of the tip of the pipe.

Further, since the operation switch is one push switch and the processing tool makes one reciprocating motion and automatically stops by one rotation of the eccentric cam, it is not necessary to continue pressing the switch during processing, and processing is performed in a stable state. Is possible.
When driving the motor, it is safe because the switch regulation plate prevents the motor from continuously rotating due to a momentary push due to mischief or carelessness.

Further, by pressing against the rear part of the work tool holder through a strong compression coil spring, a stable pressing force is applied to the work tool, and when an excessive load is applied, the absorbing force of the spring is exerted. This also has the effect of avoiding damage to the device, and since it does not have a clutch, it has excellent durability and a long service life.

When tightening and fixing the pipe to the pipe clamp device, a free ring is used and
Easy and reliable tightening is obtained by using the clamp lever that can be operated with one hand, and it is easy to install on the pipe tip processing machine body. Become.

[Brief description of the drawings]

FIG. 1 is a side view of a vertical section of a flare processing machine according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a front view of the present invention.

FIG. 4 is a side view of the eccentric cam of the present invention.

FIG. 5 is a cam curve of the eccentric cam of the present invention.

FIG. 6 is an enlarged side view of the rotation restricting plate and the micro switch unit of the present invention.

FIG. 7 is a front perspective view of the pipe clamping device for flare processing of the present invention when opened.

FIG. 8 is a perspective view of the rear surface of the pipe clamping device for flare processing of the present invention when opened.

FIG. 9 is a front view of the flare processing pipe clamping device of the present invention during pipe clamping.

FIG. 10 is a vertical cross-sectional side view during pipe clamping in the flare processing pipe clamping device of the present invention.

FIG. 11 is a vertical cross-sectional side view during pipe clamping in another example of the flare pipe clamping device of the present invention.

FIG. 12 is a vertical sectional side view of the processing tool holder and the pipe clamp device for swaging according to the present invention before processing.

FIG. 13 is a vertical cross-sectional side view of the swaging tool holder and pipe clamp device of the present invention during processing.

FIG. 14 is a vertical sectional side view of the processing tool holder for flat processing and the pipe clamp device of the present invention before processing.

FIG. 15 is a vertical cross-sectional side view of a flat processing tool holder and a pipe clamp device of the present invention during processing.

[Explanation of symbols]

1 Motor shaft 5 Planetary gear unit 6
1st driven shaft 7 gear 8 wide gear 9
Worm 10 Second driven shaft 11 Worm gear 1
2 Worm gear shaft 13 Eccentric cam 15 Cam follower 18, 60, 70 Processing tool holder 2
0 cone 25 sliding gear 30 switch regulation plate 3
1 Micro switch 33 Drive switch 36,55 Inlay part 40,67,72 Pipe clamp device 4
7 Clamp lever 52 Tapered part 53 Ring hole 5
5 Inlay part 56 Free ring 66 Processing member for swage processing 71 Processing member for flat processing

Claims (8)

(57) [Claims] 1. A first driven shaft 6 provided with a gear 7 that is decelerated and transmitted by a planetary gear device 5 arranged in front of the motor shaft 1, and a wide-width gear meshing with the gear 7 of the first driven shaft. A second driven shaft 10 having a worm 9 at the front and a worm 9 at the rear is disposed in parallel with the first driven shaft 6, and the worm 9
Worm gear 11 that meshes with eccentric cam 13 on its side
And a worm gear shaft 12 provided in a direction orthogonal to the second driven shaft 10 and a holder booth 16 in front of the eccentric cam 13 can be slid by being pressed against the eccentric cam 13 by a compression coil spring 17 at all times. A follower holder 14 having a cam follower 15 provided on the rear side, and a rear end portion of a processing tool holder 18 provided with a cone 20 at the tip end in an inclined shape, rotatably held on the follower holder 14 and a front end portion of the case body 35. Is held so as to be rotatable and slidable in the front-back direction via a sleeve 23 provided on the processing tool holder 18
An electric pipe tip processing machine in which a sliding gear 25 meshing with the wide-width gear 8 is provided in the central part of the motor, and the cone 20 is rotated back and forth by one rotation of the eccentric cam 13 by the rotation of the motor 3. . 2. A first driven shaft 6 having a gear 7 that is decelerated and transmitted by a planetary gear device 5 arranged in front of the rotation of the motor shaft 1, and a wide gear that meshes with the gear 7 of the first driven shaft. A second driven shaft 10 having a worm 9 at the front and a worm 9 at the rear is disposed in parallel with the first driven shaft 6, and the worm 9
Worm gear 11 that meshes with eccentric cam 13 on its side
And a worm gear shaft 12 provided in a direction orthogonal to the second driven shaft 10 and a holder coil 16 in front of the eccentric cam 13 are pressed against the eccentric cam 13 by a compression coil spring 17 so as to slide. Cam follower 15 that can be installed
And a follower holder 14 having a large diameter portion 19 at the tip and a cone 2 on the front surface of the tip of the tool holder 18.
The rear end of the processing tool holder 18 having an inclined 0 is rotatably held on the follower holder 14, and the front end of the processing tool holder 18 is rotatable and slidable in the front-rear direction via a sleeve 23 provided on the case body 35. , And a sliding gear 2 that meshes with the wide gear 8 at the center of the processing tool holder 18.
5 is provided via a strong compression coil spring 26 between the rear surface of the large diameter portion 19 of the processing tool holder and a cylindrical spacer 27 is interposed between the rear surface of the sliding gear 25 and the follower holder 14. An electric pipe tip processing machine in which the cone 20 is moved back and forth by rotating the eccentric cam 13 once by the rotation of the motor 3. 3. The electric pipe tip processing machine according to claim 1, wherein instead of the cone 20 provided at the tip of the tool holder, a processing member 66 for swaging at the center of the tip of the tool holder. Electric pipe tip processing machine with rotatably installed. 4. The electric pipe tip processing machine according to claim 1 or 2, wherein instead of the cone 20 provided at the tip of the tool holder, a processing member 71 for flat machining is provided at the center of the tip of the tool holder. Electric pipe tip processing machine with rotatably installed. 5. The electric pipe tip processing machine according to claim 1, wherein a tip portion of the sleeve 23 is formed so as to be locked by a spigot fitting with a pipe clamp device. 6. The electric pipe tip processing machine according to claim 1, wherein the rotation of the motor 3 is not continuously rotated by the momentary push of the drive switch 33. 7. The electric pipe tip processing machine according to any one of claims 1 to 6, wherein the eccentric cam 13 is automatically stopped after rotating once by pushing the drive switch 33. 8. A semicircular clamping surface 41, 42 for clamping a pipe 39 as a workpiece is provided in the upper center part, one end of which is pivotally supported 45 and the other end of which is provided with an arm 46. A pair of openable and closable clamp devices that are clamped and fixed by a clamp lever 47, wherein one side edge of a clamping surface on both sides of the clamp device is tapered 5
2, and a ring hole 53 having a diameter larger than the diameter of the pipe 39 is formed on the outer side surface thereof, and the inner diameter of the ring hole 53 is larger than the outer diameter of the pipe and the outer diameter is larger than the inner diameter of the ring hole 53. The free ring 56 having a small diameter is attached to the semicircular clamping surfaces 41,
A pipe clamp used for an electric pipe tip processing machine in which a circular nipping hole formed by 42 is movably loaded so as to close a part of the circular nipping hole, and a spigot portion 55 is provided on the outside thereof through a flange 54. apparatus.