JP4213087B2 - Automatic flare tool - Google Patents

Description

  The present invention relates to an automatic flare tool for expanding a pipe end of a pipe disposed in an air conditioner or the like, and in particular, can be used by connecting a rotary tool such as an impact driver driven at a low torque and high speed. It relates to an automatic flare tool.

  Conventionally, a flare tool for expanding the diameter of a pipe end of a metal pipe is often used manually with a handle (see, for example, Patent Document 1). In this case, the tube end is flared by transmitting the rotational force to the cone shaft via the handle operated by the operator, and eccentrically rotating the eccentric cone attached to the tip of the cone shaft against the tube end of the metal tube. Configured to work.

  Such a manual flare tool requires a lot of labor to rotate the cone shaft directly with the handle, the worker is likely to get tired, and because there are variations in human power, the work efficiency is not stable, Furthermore, since how to apply force differs depending on the operator, there is a problem that the finished state of the processed surface tends to be uneven.

  In view of this, a manual flare tool has been proposed that reduces the labor of the worker, improves the work efficiency, and allows the machined surface to be machined uniformly (see, for example, Patent Document 2). In this example, a manual rotation handle is provided with a speed reduction device so that the labor required for handle operation can be reduced.

  In addition, an electric flare tool has also been proposed in order to further reduce the labor of the worker and improve the work efficiency (see, for example, Patent Document 3). In this example, a motor driven by a battery and a gear reduction device are provided in the tool body, and the output of the motor is transmitted to the main shaft supporting the eccentric cone via the gear reduction device.

Furthermore, a flare tool has also been proposed in which a drive device such as an electric motor can be connected to the tool body (see, for example, Patent Document 4). In this example, a clutch that meshes with a reduction gear device is provided in the tool body, and the rotational force of the drive device connected to the tool body is reduced and transmitted to the head portion (eccentric cone).
JP 2003-260519 A JP-A-11-226675 JP 2003-126931 A JP-A-11-151534

  However, each of the above-described conventional examples (Patent Documents 2, 3, and 4) is provided with a speed reduction device in the tool body, and the speed reduction device is a complicated structure in which a plurality of revolution gears are arranged around a central gear. Due to the configuration, there is a problem that the configuration of the entire apparatus is complicated, the number of parts is increased, the volume is increased, and the cost is increased. There is also concern about the occurrence of troubles due to the complicated configuration.

  In the conventional example described in Patent Document 4, torque is transmitted by a meshing clutch in which the locking claws are engaged and disengaged. Therefore, stepless continuous torque cannot be transmitted, and the operator is engaged during the engaging and disengaging operation of the locking claws. However, there is a drawback that a large reaction force acts shockfully. In addition, when such a meshing clutch is combined with a reduction gear, in order to use a low torque drive source, the reduction ratio must be set larger, and the configuration of the reduction gear becomes more complicated and more expensive. In addition, since the entire tool becomes large, it is actually impossible to cope with low torque.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an automatic flare tool having a simple configuration in which a tool that is rotationally driven with low torque can be used as a drive source.

(1) The automatic flare tool of the present invention includes a driven rotary member 1 that receives a rotational driving force from a power rotary tool, and a cone shaft 2 that is connected to the driven rotary member 1 so as not to rotate relative to the driven rotary member 1. The thrust shaft 3 is inserted into the cone shaft 2 so as to be rotatable relative to the driven rotating member 1 and is connected to the driven rotating member 1 so as not to be rotatable relative to the driven rotating member 1, and the cone shaft 2 is relatively rotatable. A thrust sleeve 4 to be inserted into the friction sleeve, a friction sliding clutch 7 formed between the thrust clutch 3 and the thrust sleeve 4 and capable of continuously transmitting torque, and the thrust sleeve 4 to the cone. An outer cylinder frame 6 that is supported so as to be capable of screwing back and forth in the axial direction of the shaft 2 and that supports and supports the workpiece 5 at a machining position
While rotating the cone shaft 2 and transmitting torque continuously to the thrust sleeve 4, the eccentric cone 8 attached to the tip of the cone shaft 2 is eccentrically rotated while being pushed into the workpiece 5. The work 5 is flared.

  According to such a configuration, when the rotational force is transmitted to the driven rotating member 1, the eccentric cone 8 rotates and torque is continuously and continuously applied to the thrust sleeve 4 by the frictional sliding clutch 7. Therefore, the rotating eccentric cone 8 can be pushed into the workpiece 5 while flexibly following the torque fluctuation that slightly changes according to the progress of the machining state. Therefore, the workpiece 5 can be smoothly and efficiently flared without an impact, and a uniform processed surface can be obtained. In addition, for example, if an impact driver is used for the power rotary tool, it can be flare processed with high workability and high efficiency only in the low torque high speed rotation region (without using the impact operation region). Other electric tools, pneumatic tools, hydraulic tools, and the like can also be used.

(2) The friction sliding clutch 7 may be configured such that the input portion and the output portion are urged against each other by point contact to transmit a driving force while sliding frictionally. In this way, the configuration of the frictional sliding clutch 7 that transmits the torque continuously and continuously is simplified by configuring the point contact state in which they are urged against each other.

(3) The power rotary tool may be capable of being driven with low torque and high speed rotation. For example, if a cordless impact driver capable of selecting torque of 10 N · m or less and a rotational speed of 0 to 3000 rpm is used as a driving source, an impact is involved in a low torque high speed rotation region (for example, 10 N · m or less, 500 to 3000 rpm). Flare processing can be performed smoothly with good workability and high efficiency. Although a rotary tool with high torque and low speed rotation (for example, 10 N · m or more and 350 rpm or less) can be used, the above-described friction sliding clutch 7 capable of continuously transmitting torque can be used. If a rotating tool with high versatility such as low torque and high speed rotation is used, flaring can be performed more efficiently.

(4) A gauge 9 having a plurality of workpiece receiving holes 9a to 9e is supported in a fixed state at the lower part of the outer cylinder frame 6, and the workpiece 5 is fitted into the workpiece receiving holes 9a to 9e corresponding to the machining positions. And may be flared. In this way, it is possible to deal with multiple types of workpieces 5 having different diameters with a single gauge 9.

(5) The gauge 10 having a single workpiece receiving hole 10a corresponding to the machining position is supported in a fixed state at the lower part of the outer cylinder frame 6, and the workpiece 5 is fitted in the workpiece receiving hole 10a. It may be flared. In this way, since the compact gauge 9 is supported at the lower part of the outer cylinder frame 6, handling workability at the time of flare processing is improved.

(6) The gauge 10 provided with the single workpiece receiving hole 10a is composed of a round gauge 101 and a square gauge 102 formed in a half crack shape, and the round gauge 101 is formed in the lower part of the outer cylinder frame 6. The angular gauge 102 is rotatably and detachably supported in the workpiece support 61A, while the angular gauge 102 can be tightened and detachable by a fastening member 21 that is rotatably fitted to the work support 61A. The workpiece 5 fitted in the workpiece receiving hole 10a may be fixed by being supported in the workpiece support 61A and tightening the round gauge 101 and the square gauge 102 by the clamping member 21. In this way, the workpiece 5 can be easily attached to the gauge 10 by fitting the rear gauge 102 into the round gauge 101 previously supported in the workpiece support portion 61A and then tightening with the fastening member 21. Can be fixed.

  In the automatic flare tool of the present invention, torque is transmitted to the thrust sleeve via a frictional sliding clutch capable of continuously transmitting torque, so that it changes slightly according to the progress of the machining state. The rotating eccentric cone can be pushed into the workpiece by flexibly following the fluctuation of the torque to be performed. Therefore, the workpiece can be smoothly and efficiently flared without causing an impact, and a uniform processed surface can be obtained. In addition, for example, rotary tools such as low-torque high-speed impact drivers and other rotary tools such as electric, pneumatic and hydraulic tools can be used as a drive source. improves.

The automatic flare tool according to the preferred embodiment of the present invention will be described in detail below with reference to the drawings.
[Embodiment 1]
This embodiment is shown in FIGS. FIG. 1 is a sectional view of an automatic flare tool. Reference numeral 1 denotes a driven rotating member (bit) that receives a rotational driving force transmitted from a power rotary tool (not shown), and 2 cannot rotate relative to the bit 1. The cone shaft 3 is connected to the thrust clutch 3, which allows the cone shaft 2 to be inserted into the cone shaft 2 so as to be rotatable relative to the bit 1. 3 is an outer cylinder frame that supports the thrust sleeve 4 so that the thrust sleeve 4 can be screwed back and forth in the axial direction of the cone shaft 2. (A) and (b) are fixedly supported at the processing position.

  In such an automatic flare tool, the power rotary tool connected to the above-described bit 1 is, for example, a low torque high speed rotation such as an impact driver that can be selected from a torque of 10 N · m or less and a rotation speed of 0 to 3000 rpm. However, the present invention is not limited to this, and other rotary tools may be used. In particular, low torque and high speed rotation is not a requirement. A friction sliding clutch 7 capable of continuously transmitting torque is formed between the thrust clutch 3 and the thrust sleeve 4, and the cone shaft is interposed via the friction sliding clutch 7. The workpiece 5 is flare-processed by rotating the eccentric cone 8 attached to the tip of the cone shaft 2 to the workpiece 5 while being urged against the workpiece 5 and rotating eccentrically.

  The frictional sliding clutch 7 is configured to transmit a driving force while frictionally sliding, for example, with an input portion and an output portion being urged against each other by point contact, and specifically, a lower portion of the thrust clutch 3. Three steel balls 3 a are embedded and fixed at the periphery in the same phase, and the three steel balls 3 a are attached to the upper peripheral edge of the thrust sleeve 4 by the elastic force of the clutch spring 11 interposed between the thrust clutch 3 and the bit 1. It is comprised so that it may carry out urging pressure-contact to the sliding contact surface formed in this. Such a simple configuration enables stepless continuous torque transmission.

  In the automatic flare tool configured as described above, when the rotational force is transmitted to the bit 1, the eccentric cone 8 is rotated and the friction sleeve clutch 7 is continuously stepped against the thrust sleeve 4. Thus, the rotating eccentric cone 8 can be pushed into the workpiece 5 flexibly following the torque fluctuation that slightly changes according to the progress of the machining state. Therefore, the workpiece 5 can be smoothly flared smoothly without an impact, and a uniform machined surface can be obtained. Especially, in the low torque and high speed rotation region (for example, 500 to 3000 rpm), the impact can be obtained. It is possible to smoothly and efficiently perform flaring processing without accompanying. Although a rotary tool driven at a high torque and low speed rotation (for example, 10 N · m or more and 350 rpm or less) can be used as a drive source, the frictional sliding clutch 7 capable of continuously transmitting torque continuously. By adopting the above, it is possible to perform the flare processing more efficiently by using a rotary tool of the type that is driven by the low-torque high-speed rotation having high versatility as described above.

  More specifically, the upper portion of the cone shaft 2 is fixed to the bit 1 by a pin 13, and the eccentric cone 8 is rotatably supported at the lower portion thereof. The shaft 8a of the eccentric cone 8 is inclined so as to be slightly offset from the axis of the cone shaft 2, and is set so that the center of the head 8b of the eccentric cone 8 is directed to the axis of the cone shaft 2. 8a is rotatably supported by a shaft hole formed in the cone shaft 2 by two upper and lower needle bearings 14 and 14, and is removed by a retaining ring 15 fitted between the needle bearings 14 and 14. Is prevented.

  A pin 16 is fixed downward on the lower peripheral edge of the bit 1, and the pin 16 is movably inserted into a pin hole formed in the upper peripheral edge of the thrust clutch 3. They are connected so that they cannot rotate relative to each other and can move freely. A clutch spring 11 is fitted into a recess formed in the central portion of the thrust clutch 3, and the thrust clutch 3 is biased in a direction away from the bit 1.

  On the other hand, since the lower end of the thrust sleeve 4 is in contact with the upper surface of the circumferential step portion 2a projecting from the lower portion of the cone shaft 2, the sliding contact surface formed on the upper peripheral edge of the thrust sleeve 4 as described above. The three steel balls 3 a embedded in the lower peripheral edge of the thrust clutch 3 that is biased downward by the elastic force of the clutch spring 11 are pressed against each other.

  A screw is formed on the outer periphery of the thrust sleeve 4, and the screw is screwed into a frame screw sleeve 17 fixed by shrink fitting or the like inside the outer cylinder frame 6, and the thrust sleeve 4 is attached to the outer cylinder frame 6. It can be screwed back and forth in the vertical direction (axial direction of the cone shaft 2). Therefore, when the rotational force is transmitted to the thrust sleeve 4 via the frictional sliding clutch 7, the thrust sleeve 4 is screwed up and down in the vertical direction.

  As shown in FIGS. 2 (a) and 2 (b), a lower hole of the outer cylinder frame 6 has a horizontal hole and a receiving part for inserting a gauge 9 having a plurality of work receiving holes having a flare forming surface. A part 6 a is formed, and the work piece receiving holes 9 a to 9 e of the gauge 9 inserted into the holding part 6 a are made to correspond to the machining position, and the gauge 9 can be fixed with the fixing screw 18. Thereby, a plurality of kinds of workpieces 5 having different diameters can be flared by a single gauge 9.

  For example, as shown in FIGS. 3A and 3B, the gauge 9 includes two members 91 and 92 that are openable and closable, each having a work receiving hole (9a to 9e) formed in a half-crack shape. As described above, the work receiving holes 9a to 9e having a plurality of flare forming surfaces are formed in a state where the two members 91 and 92 are closed. Parallel grooves are formed on the inner peripheral surfaces of the workpiece receiving holes 9a to 9e so that the workpiece 5 can be held without dropping off, and a recess e for alignment is formed on the outer surfaces of the members 91 and 92. Has been.

  Next, flare machining of the automatic flare tool will be described with reference to FIGS. 2A is a front view of the initial state of flaring, FIG. 2B is a side view thereof, FIG. 3A is a cross-sectional view taken along line AA in FIG. 2A, and FIG. 2A is a cross-sectional view taken along line B-B in FIG. 2A, FIG. 4A is a front view at the end of flaring, FIG. 5B is a side view thereof, and FIG. 5A is FIG. It is a CC arrow directional cross section.

  First, a gauge 9 is prepared, a workpiece receiving hole 9a having a size suitable for the workpiece 5 to be flared is selected, the workpiece 5 is inserted into the workpiece receiving hole 9a, and the gauge 9 is held by the outer cylinder frame 6. It fixes to the part 6a. At this time, as shown in FIGS. 2 (a), 2 (b) and 3 (a), the thrust sleeve 4 is at the uppermost position with respect to the outer cylinder frame 6, and the eccentric cone 8 corresponds to directly above the workpiece 5. (See FIG. 3 (a)).

  Next, for example, when a rotating tool such as an impact driver (not shown) is connected to the bit 1 and the bit 1 is driven at low torque and high speed rotation, the eccentric cone 8 rotates and the friction sliding clutch 7 is used. Since the torque is transmitted to the thrust sleeve 4, the thrust sleeve 4 is screwed downward, and the head 8b of the eccentric cone 8 is rotated while being pressed against the inner peripheral edge of the upper end of the work 5, and flare processing is started. .

  As the flaring process starts, the thrust sleeve 4 receives resistance in a direction in which the screwing is prevented, but torque is transmitted continuously and continuously via the frictional sliding clutch 7, so that the progress of the machining state is increased. Accordingly, the rotating eccentric cone 8 can be pushed into the workpiece 5 flexibly following the change in torque that slightly changes accordingly, so that the flare processing can be continuously advanced. Meanwhile, rotating tools such as impact drivers continue to rotate at high speed with low torque.

  By continuously transmitting torque to the thrust sleeve 4 in this manner, torque can be transmitted appropriately in accordance with the degree of progress of the machining state while rotating a rotary tool such as an impact driver at high speed with low torque. Continued, the thrust sleeve 4 can be gradually pushed down. Therefore, flare processing can be continued smoothly without causing an impact. When the thrust sleeve 4 reaches the lowest position with respect to the outer cylinder frame 6 as shown in FIGS. 4 (a), 4 (b) and 5, the work 5 is flare in the work receiving hole 9a of the gauge 9. The diameter of the eccentric cone 8 is increased so as to be in close contact with the formation surface, and the eccentric cone 8 is idled while being in sliding contact with the inner surface of the flare formation portion of the gauge 9. At this point, the flare processing is completed, and a uniform processed surface can be obtained.

[Embodiment 2]
This embodiment is shown in FIGS. 6 is a longitudinal sectional view of the automatic flare tool, FIGS. 7A to 7D show an initial state of flare processing, FIG. 7A is a front view of the automatic flare tool, and FIG. 7 (a) is a cross-sectional view taken along line DD, 7 (c) is a cross-sectional view taken along line EE of FIG. 7 (a), and 7 (d) is a bottom view. 8 (a) and 8 (b) show the completed state of flare machining, FIG. 8 (a) is a front view of the automatic flare tool, and FIG. 8 (b) is a sectional view taken along line FF in FIG. 8 (a). FIG. 9 is an exploded perspective view when the work 5 is set.

  As shown in these drawings, in the present embodiment, a compact gauge 10 having a single workpiece receiving hole 10a is supported in a fixed state at the lower portion of the outer cylinder frame 6, and is fitted into the workpiece receiving hole 10a. Since the mounted work 5 is flared, the gauge does not protrude outward as in the conventional case, and handling workability during flaring is improved. Note that the basic configuration of the present embodiment is the same as that of the previous embodiment, and the same members and equivalent members are denoted by the same reference numerals and description thereof is omitted.

  In the present embodiment, the outer cylinder frame 6 has a rubber cover 62 fitted on the outside of a straight frame 61 made of a metal material, and a single workpiece is mounted on a workpiece support portion 61A formed at the lower portion of the straight frame 61. The gauge 10 provided with the receiving hole 10a is supported in a fixed state. The gauge 10 is composed of a round gauge 101 and a square gauge 102 formed in a half-break shape, and the gauges 101 and 102 are combined to form a workpiece receiving hole 10a having a flare forming surface (FIG. 7C). (See (d)).

  The work support portion 61A below the straight frame 61 is composed of a straight portion 63 and a flange portion 64 provided continuously therebelow. As shown in FIG. 9, the straight portion 63 is formed in a cylindrical shape having an opening 63a. Both gauges 101 and 102 are accommodated therein, and the collar portion 64 has a notch 64a continuous under the opening 63a to receive and support both gauges 101 and 102 and to tighten both gauges 101 and 102. Therefore, the fastening member (tightening ring) 21 is prevented from falling off. From the opening 63a and the notch 64a, the workpiece 5 and the gauges 101 and 102 can be fitted into the straight portion 63 in the lateral direction.

  The round gauge 101 described above is rotatably fitted in the straight portion 63, but a sphere 102 a is embedded in the square gauge 102, and the sphere 102 a is formed in the cam groove 21 a formed inside the tightening ring 21. When the tightening ring 21 is rotated to the right or left in the loosely fitted state, the ball 102a is tightened by the cam groove 21a. , 102 and is fixed in the work support portion 61A. Note that the fastening member 21 does not necessarily have a closed loop shape, and may be, for example, a C ring type in which a part thereof is opened.

  The flare processing of the automatic flare tool configured as described above will be described with reference to FIGS. First, as shown in FIG. 9, the tightening ring 21 is moved to a standby position directly below the rubber cover 62 of the straight frame 61 (in this state, only the round gauge 101 is fitted in the straight portion 63). Then, the workpiece 5 and the square gauge 102 are fitted into the straight portion 63 from the opening 63a and the notch 64a, and the tightening ring 21 is lowered as shown in FIGS. The workpiece 5 is fixed by inserting 102a and turning right or left. At this time, the thrust sleeve 4 is at the uppermost position with respect to the outer cylinder frame 6, and the eccentric cone 8 is at the initial position corresponding to directly above the workpiece 5.

  Next, when a rotating tool such as an impact driver (not shown) is connected to the bit 1 and the bit 1 is driven with low torque and high speed rotation, the eccentric cone 8 rotates and the thrust is moved via the friction sliding clutch 7. Since the torque is transmitted to the sleeve 4, the thrust sleeve 4 is screwed downward, and the head 8 b of the eccentric cone 8 is rotated while being pressed against the inner peripheral edge of the upper end of the work 5, and flare processing is started. When driving a rotary tool such as an impact driver, the operator can hold the automatic flare tool with high stability by gripping the rubber cover 62.

  As the flaring process starts, the thrust sleeve 4 receives resistance in a direction in which the screwing is prevented, but torque is transmitted continuously and continuously via the frictional sliding clutch 7, so that the progress of the machining state is increased. Accordingly, the rotating eccentric cone 8 can be pushed into the workpiece 5 flexibly following the change in torque that slightly changes accordingly, so that the flare processing can be continuously advanced. Meanwhile, rotary tools such as impact drivers continue to rotate at high speed with low torque.

  By continuously transmitting torque to the thrust sleeve 4 in this manner, torque can be transmitted appropriately in accordance with the degree of progress of the machining state while rotating a rotary tool such as an impact driver at high speed with low torque. Since the thrust sleeve 4 can be gradually pushed down continuously, flare processing can be continued smoothly and efficiently without causing an impact. When the thrust sleeve 4 reaches the lowest position with respect to the outer cylinder frame 6 as shown in FIGS. 8A and 8B, the work 5 is placed on the flare forming surface of the work receiving hole 10a of the gauge 10. The diameter of the eccentric cone 8 is increased so as to be in close contact with each other, and the eccentric cone 8 is idled while being in sliding contact with the inner surface of the flare forming portion of the gauge 10. At this point, the flare processing is completed, and a uniform processed surface can be obtained. After the processing is completed, by returning the tightening ring 21 to the original position, the tightening of the two gauges 101 and 102 with respect to the work 5 can be released, and the processed work 5 can be taken out together with the square gauge 102.

  The automatic flare tool of the present invention is not limited to the embodiment, and can be freely changed in design and improved according to the use conditions and the like without departing from the gist of the invention. The dynamic clutch 7 may slide between the sliding contact surfaces, or may have a rolling element interposed between the input part and the output part, and continuously transmit torque. Any configuration is possible as long as this is possible.

It is sectional drawing of the automatic flare tool which concerns on Embodiment 1 of this invention. (A) is a front view of the automatic flare tool of the initial state which set the workpiece | work to the gauge, (b) is a side view. (A) is the sectional view on the AA line of FIG. 2 (a), (b) is sectional drawing on the BB line of FIG. 2 (a). (A) is a front view of the automatic flare tool in the state where the flare machining of the workpiece has been completed, and (b) is a side view. It is CC sectional view taken on the line of FIG. It is sectional drawing of the automatic flare tool which concerns on Embodiment 2 of this invention. (A) is a front view of an automatic flare tool in an initial state in which the workpiece is set on a gauge, (b) is a sectional view taken along line DD of (a), and (c) is an EE of (a). A sectional view taken along line arrow, (d) is a bottom view. (A) is a front view of the automatic flare tool in the state where the flare machining of the workpiece has been completed, and (b) is a cross-sectional view taken along line FF in (a). It is explanatory drawing when accommodating the workpiece | work in a workpiece support part with a square gauge.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Driven rotation member, 2 ... Cone shaft, 3 ... Thrust clutch, 4 ... Thrust sleeve, 5 ... Workpiece, 6 ... Outer cylinder frame, 7 ... Friction sliding clutch, 8 ... Eccentric cone, 9 ... Gauge, 9a- 9e ... Work receiving hole, 10 ... Gauge, 10a ... Work receiving hole, 21 ... Tightening ring, 61A ... Work support part, 101 ... Round gauge, 102 ... Square gauge

Claims (5)

A driven rotating member (1) for receiving a rotational driving force from the power rotary tool;
A cone shaft (2) coupled to the driven rotating member (1) so as not to rotate relative to the driven rotating member (1);
A thrust clutch (3) inserted through the cone shaft (2) so as to be relatively rotatable, and connected to the driven rotating member (1) so as not to be rotatable relative to the driven rotating member (1);
A thrust sleeve (4) through which the cone shaft (2) is inserted in a relatively rotatable manner;
A friction sliding clutch (7) formed between the thrust clutch (3) and the thrust sleeve (4) and capable of continuously transmitting torque;
An outer cylinder frame (6) for supporting the thrust sleeve (4) so as to be able to be screwed back and forth in the axial direction of the cone shaft (2), and for fixing and supporting the work (5) at a processing position;
The eccentric cone (8) attached to the tip of the cone shaft (2) is transferred to the thrust sleeve (4) steplessly and continuously while the cone shaft (2) is driven to rotate. An automatic flare tool characterized in that it is eccentrically rotated while being pushed into (5) to flare the workpiece (5).   2. The friction sliding clutch (7) is configured to transmit a driving force while frictionally sliding with an input portion and an output portion being urged against each other by point contact. Automatic flare tool as described. A gauge (9) having a plurality of workpiece receiving holes (9a to 9e) is supported in a fixed state at the lower part of the outer cylinder frame (6), and the workpiece (5) is a workpiece receiving hole ( The automatic flare tool according to claim 1 or 2, wherein the flare tool is fitted to 9a to 9e) and flared. A gauge (10) having a single workpiece receiving hole (10a) corresponding to the machining position is
The workpiece (5) is supported in a fixed state at a lower portion of the cylinder frame (6), and the workpiece (5)
The automatic flare tool according to any one of claims 1 to 3, wherein the flare tool is fitted into (10a) and flared. The gauge (10) provided with the single workpiece receiving hole (10a) is formed in a half crack shape.
Round gauge (101) and square gauge (102), the round gauge (101)
It is rotatable and detachable in the work support part (61A) formed in the lower part of the outer cylinder frame (6).
On the other hand, the square gauge (102) is freely rotatable on the workpiece support (61A).
The workpiece support is detachable and detachable by a fastening member (21) fitted on the outer surface of the workpiece.
Supported in the portion (61A) and the round gauge (101) by the fastening member (21)
And the square gauge (102) are tightened to fit into the workpiece receiving hole (10a).
5. The automatic flare tool according to claim 4 , wherein the workpiece (5) is fixed .

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