JP3427176B2 - Cutting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for circumferentially cutting a hollow body having a perfect circle and other cross-sectionally irregular shapes.

Further, the present invention relates to a device for easily cutting in a circumferential direction a closed container having a cross section other than a perfect circle, such as a compressor shell used in a refrigerator or an air conditioner.

[0003]

2. Description of the Related Art Conventionally, a lathe or a pipe cutter has generally been used to cut a hollow object in the circumferential direction. However, all of them are devices that are supposed to cut only those having a perfect circular shape in the circumferential direction, and it is difficult to cut in the circumferential direction an object having an irregular shape in the circumferential direction, for example, an object having an elliptical cross section in the conventional device. . In other words, in the case of a deformed section in the circumferential direction, the diameter of the cross section is not constant, so that the position of the blade or the position of the cutting target is moved according to the diameter of the cross section regardless of whether the lathe is used or the pipe cutter is used. It was necessary, and it was difficult to cut a hollow body having an irregular cross section in the circumferential direction. Further, when a lathe is used, chips are produced during cutting, which hinders the work.

[0004] Recently, when discarding electrical products,
It is necessary to cut the compressor shell, which is a component of the electric product, and disassemble the inside thereof. Many compressor shells used in refrigerators and air conditioners have irregular cross-sections in the circumferential direction.Therefore, if a conventional device that envisions cutting a perfect circle is used, it will take a very long time to disassemble for the same reason as above. It took effort. Therefore, it has been desired to develop a device for facilitating the circumferential cutting and the dismantling work of these products having the irregular sectional shape in the circumferential direction.

Cutting synthetic resin pipes with irregular cross-section in the circumferential direction
As a chamfering device, there is an invention disclosed in Japanese Patent Publication No. 58-35838. However, since the invention uses a link mechanism to transmit the force of the fluid cylinder to the cutter blade, as the distance from the center of rotation to the cutting contact surface changes, the reaction force received from the cutter blade causes the link mechanism to move. And the fluid cylinder had to violently reciprocate. Also, the combined force received by the multiple cutting blades on the object to be cut does not have the function of holding the object to be cut, so the torque is transmitted to the object to be cut, and at the same time the object to be cut is held firmly in the center of rotation A mechanism for doing so was required separately from the cutter blade. Further, the cutter blade needs to rotate the blade itself at a high speed by a belt or a chain and transmit the cutting force for cutting while cutting.

[0006]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a cutting device for easily cutting in a circumferential direction a hollow object having a perfect circle and other cross-sectionally irregular shapes.

Another object of the present invention is to provide a cutting device that easily cuts a closed container having a cross section other than a perfect circle, such as a compressor shell used in a refrigerator or an air conditioner, in the circumferential direction.

Another object of the present invention is to provide a cutting device that does not generate chips during cutting.

Still another object of the present invention is to provide a cutting device provided with a mechanism for easily aligning the center of rotation of an object to be cut with the cutting centers of a plurality of cutters.

[0010]

According to the present invention, there is provided a device for cutting a rotating object to be cut, wherein two heads are provided at positions symmetrical with respect to a rotation center point of the object to be cut. There is provided a device rotatably provided with respect to the device around a rotation center point. Each of the two heads is provided with two cutters. The two cutters are rotatable with respect to the head. The rotation center point of the head and the rotation center points of the two cutters provided on the head are arranged so as to draw a substantially isosceles triangle. The rotating planes of the four cutters are coplanar. While keeping the distance between one head and the center of rotation of the object to be cut equal to the distance between the other head and the center of rotation of the object to be cut, the distance is cut by some method to reduce the distance. Press the object.

The peripheral cut surface of the object to be cut can be cut even if it has an irregular shape (including an ellipse).

When the object to be cut is rotated, the object to be cut is
It is obtained by mounting on a rotary table provided in the cutting device.

One head is rotatably attached to one movable arm, another head is rotatably attached to another movable arm, and one movable arm and another movable arm are slidable means and a cylinder. Are slidably engaged with each other via the, and the pressing of the object to be cut is realized by the cooperation of the sliding means and the cylinder.

The cutter unit formed by the engagement of one movable arm and the other movable arm can be lifted from the apparatus while rotating around a shaft provided in the sliding mechanism.

[0015]

[Embodiment 1] FIG. 1 to FIG. 4 show an apparatus in which a circumferential cut surface of an object to be cut is elliptical. 1 to 4 show the operation of the device as the object to be cut rotates in the direction of arrow A, with reference to time.

As shown in FIG. 1, the object 1 to be cut is cut.
0 is sandwiched between the cutter body 1 and the cutter body 11. The cutter body 1 includes a head 2 and two cutters 3 and 5, and the cutter 3 is rotatably attached to the head 2 at a cutter rotation shaft 4 and the cutter 5 at a cutter rotation shaft 6. Similarly, the cutter body 11 comprises a head 12 and two cutters 13 and 15,
The cutter 13 is rotatably attached to the head 12 at the cutter rotation shaft 14, and the cutter 15 is rotatably attached to the head 12 at the cutter rotation shaft 16.

The cutter body 1 is rotatably attached to a head receiver 9 on a head rotation shaft 7. Similarly, the cutter body 11 is rotatably attached to the head receiver 19 on the head rotation shaft 17.

The cutter bodies 1 and 11 have arrows D and D & a.
The object to be cut 10 is appropriately pressed in the direction indicated by cute ;. As described below, the cutting of the object 10 is performed by rotating the object 10 while pressing the cutter body 1 in the arrow D direction and the cutter body 11 in the arrow D ´ direction respectively. Therefore, arrows D, D & acut
The force of pressing in the e; direction is adjusted depending on the strength of the cutting target and the cross-sectional shape of the cutting target.

Due to the presence of the guide 8 and the guide 18,
The direction in which the head receiver 9 presses the object to be cut 10 (arrow D) and the direction in which the head receiver 19 presses the object to be cut 10 (arrow D ´) are kept constant.

The object 10 to be cut is rotated in the direction of arrow A from the state shown in FIG. 1 by means such as placing it on a rotary table. At this time, the cutter body 1 follows the rotation of the object to be cut 10 and rotates about the head rotation shaft 7 in the arrow B direction. Similarly, the cutter body 11 follows the rotation of the object to be cut 10 and rotates about the head rotation shaft 17 in the direction of arrow C. At this time, the center of rotation of the object to be cut is the head rotation shaft 7
And the head rotation shaft 17 are on a straight line. Further, the cutter body 1 and the cutter body 11 are on the same plane in the horizontal direction.

When the object 10 to be cut has rotated 45 degrees from the state shown in FIG. 1, the cutter body 1 rotates in the direction of arrow B.
And the rotation direction of the cutter body 11 is the opposite direction of the arrow C. That is, from the state shown in FIG. 2, as the object 10 is further rotated in the direction of arrow A, the cutter body 1 is rotated in the arrow B ´ direction, and the cutter body 11 is similarly rotated. Rotate by changing the direction of rotation to C ´.

As shown in FIG. 3, when the object 10 to be cut is rotated 90 degrees from the state shown in FIG.
Returns to the position shown in FIG. When the object to be cut 10 further rotates in the direction of arrow A, the cutter body 1 further rotates in the direction of arrow B ´ and the cutter body 11 further rotates in the direction of arrow C & acute.

From the state shown in FIG.
When the cutter body 1 is rotated once, the rotation direction of the cutter body 1 is opposite to the arrow B ´ and the rotation direction of the cutter body 11 is opposite to the arrow C ´. That is, FIG.
From the state shown in (1), as the cutting object 10 further rotates in the direction of arrow A, the cutter body 1 rotates by changing the direction of rotation in the direction of arrow B, and the cutter body 11 similarly rotates in the direction of arrow C. Turn to rotate. Although not shown, when the object 10 is rotated 180 degrees from the state shown in FIG. 1, the cutter body 1 and the cutter body 11 return to the positions shown in FIG.

That is, by rotating the object 10 to be cut and pressing the cutter bodies 1 and 11 in the D, D ´ directions, the four cutters 3, 5, 13 and 15 are rotated about the center of rotation of the object 10 to be cut. It presses and rotates on a line of the side surface of the object to be cut 10 which intersects with a plane perpendicular to the rotation axis of 62 without always separating. As a result, four cutters 3, 5, 1
The object 10 to be cut is plastically deformed by the pressing of 3, 15,
The object to be cut 10 is cut in the circumferential direction.

Since the object 10 to be cut is plastically deformed, chips are not generated by the cutting. Further, as shown in FIG. 2, the forces of the four cutters 3, 5, 13, 15 that press the workpiece 10 cancel each other out, and the strokes associated with rotation and cutting are synchronized. Furthermore, the head receiver 2,
By making the head 12 rotatable about the head rotation shafts 7 and 17, the four cutters follow the rotation of the cutting object 10 even if the cutting surface of the cutting object 10 is elliptical. It is possible to keep the side surface always pressed with substantially constant force, and the four cutters continue to press the object 10 with substantially equal forces. As a result, the rotational load of the cut object does not change,
Even when the cut surface of the object to be cut is elliptical, the rotational torque is about the same as when the cut surface of the object to be cut is a perfect circle. Further, since a bending moment is unlikely to be generated on the rotary shaft, the object 10 to be cut can be easily held.

[0026]

[Embodiment 2] FIG. 5 shows a case where the cross section of the object to be cut 21 in the circumferential direction is a rounded quadrangle. Even when the object to be cut 21 has a rounded rectangular shape, the object to be cut 21 is easily cut in the circumferential direction by the same operation as shown in FIGS. 1 to 4.

[0027]

[Embodiment 3] FIGS. 6 to 9 show an apparatus in which a movable arm A30 having one cutter body attached and a movable arm B40 having one cutter body attached are attached.

As shown in FIG. 6, the movable arm A30 and the movable arm B40 are integrated through a sliding mechanism 48 and a cylinder 34 to form a cutter unit 44.

The movable arm A30 comprises a head receiver 32, a cylinder receiver 33, and a pair of long arms 31. A cutter body 35 is rotatably attached to the head receiver 32 on a rotary shaft 39. The cutter body 35 includes a head 36 and two cutters 37 and 38, and the two cutters 37 and 38 are rotatable with respect to the head 36.

The movable arm B40 comprises a head receiver 41, a cylinder receiver 43 and a pair of rack shafts 42.
A movable cutter body 50 is rotatably attached to the head receiver 41 about a rotary shaft 52. Movable cutter body 50
Is composed of a head 51 and two cutters 53 and 54, and the two cutters 53 and 54 are rotatable with respect to the head 51.

The sliding mechanism 48 comprises a pinion receiver 45, a pinion 46, a pair of rack shafts 42 of the movable arm B40, and a rack portion 47 provided on the pair of long arms 31 of the movable arm A30. The rack shaft 42, and the rack (rac
The k) portion 47 has teeth of the same shape at equal intervals. A pair of rack shafts 42 and a pair of rack portions 47 are respectively engaged with the pinions 46. The cutter unit 44 and a rotary table 60, which will be described later, are attached to a common frame 59 (FIGS. 8 and 9) via a unit rotary shaft 57 and a rotary shaft centered on a rotation center 62, respectively. The cylinder receiver 43 of the movable arm B40 is slidably coupled to the cylinder 34 fixed to the cylinder receiver 33 of the movable arm A30. By the cooperation of the cylinder 34 and the pair of sliding mechanisms 48, the movable arm A30 and the movable arm B40 can slide on each other via the pinion 46.

In the initial state, the rotary shaft 39 and the rotary shaft 52
The center of rotation 62 of the rotary table 60 is arranged on the straight line connecting the two so that the rotary shaft 39 and the rotary shaft 52 are equidistant from each other.
Therefore, sliding of the movable arm A30 and the movable arm B40 is performed by the distance between the cutters 37 and 38 of the movable arm A30 and the rotation center 62 and the cutters 53 and 5 of the movable arm B40.
4 and the center of rotation 62 are always equal.

In FIG. 6, the rotary table 60 is used for cutting the workpiece 5.
5 is not mounted, and the movable arm A30 and the movable arm B40 are at positions separated from each other. Figure 7
In the rotary table 60, the object 55 to be cut is mounted, and the distance between the movable arm A30 and the movable arm B40 is narrowed by the sliding of the movable arm A30 and the movable arm B40.
And the cutters 53 and 54 show a state in which the object 55 to be cut is caught.

FIG. 8 is a side view of the cutting device 56 having the structure shown in FIGS. 6 and 7. On the frame 59,
The pinion receiver 45 is attached via a rotary shaft 57, and the rotary table 60 is attached via a rotary shaft (not shown) centered on a rotation center 62. Turntable 6
0 is provided with a mount 61, and the rotary table 60 is rotated by a motor 58 provided at a proper position of the cutting device 56. The cutter unit 44 in which the movable arm A30 and the movable arm B40 are integrally configured is rotated about 90 degrees upward about a unit rotation shaft 57 provided in the pinion receiver 45 that constitutes the sliding mechanism 48.

The operation is as follows. In the operation, first, the cutter unit 44 of the cutting device 56 is lifted while rotating about the unit rotation shaft 57, the height of the mount 61 is adjusted, and then the object to be cut 55 is mounted on the mount 61 (FIG. 8, (Figure 9). Next, the cutter unit 44 is lowered. At this time, the head receiver 32 and the head receiver 41 are separated from each other (FIG. 6). Next, the movable arm A30 and the movable arm B40 are brought closer to each other by the cooperation of the cylinder 34 and the sliding mechanism 48. At this time, the movable arm A30 and the movable arm B40 approach each other toward the rotation center 62 so as to be equidistant from each other. Further, the rotation center of the object to be cut 55 and the rotation center 62 of the rotary table 60 are matched in advance. As a result,
The four cutters 37, 38, 53, 54 contact the outer periphery of the object 55 to be cut almost at the same time. Cutter 3 as it is
When the rotary table 60 is rotated while pressing 7, 38, 53, 54 against the object 55 to be cut, the four cutters 3
7, 38, 53, 54 start to bite along the outer periphery of the object 55 to be cut, and the object 55 to be cut is eventually cut in the circumferential direction.

[0036]

[0037]

According to the present invention, there is provided a cutting device capable of easily cutting not only a perfect circle but also a hollow object having various cross-sectional shapes such as an elliptical shape, a square with rounded corners and the like in the circumferential direction. Can be provided.

Further, according to the present invention, not only a perfect circle but also a closed container whose circumferential cross section is elliptical, such as a compressor shell used in a refrigerator or an air conditioner, can be easily cut in the circumferential direction. A cutting device can be provided.

Further, it is possible to provide a cutting device in which chips are not generated during cutting.

Furthermore, it is possible to provide a cutting device provided with a mechanism for easily aligning the rotation center of the object to be cut with the cutting centers of the plurality of cutters.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of an apparatus according to the present invention.

FIG. 2 is an explanatory diagram of Embodiment 1 of the apparatus according to the present invention.

FIG. 3 is an explanatory diagram of Embodiment 1 of the apparatus according to the present invention.

FIG. 4 is an explanatory diagram of Embodiment 1 of the apparatus according to the present invention.

FIG. 5 is an explanatory diagram of Embodiment 2 of the device according to the present invention.

FIG. 6 is an explanatory diagram of Embodiment 3 of the apparatus according to the present invention.

FIG. 7 is an explanatory diagram of Embodiment 3 of the apparatus according to the present invention.

FIG. 8 is an explanatory diagram of a third embodiment of the apparatus according to the present invention.

FIG. 9 is an explanatory diagram of Embodiment 3 of the apparatus according to the present invention.

[Explanation of symbols]

1 ... Cutter body 2 head 3 ... Cutter 4 ... Cutter rotation axis 5 ... Cutter 6 ... Cutter rotation axis 7-Head rotation axis 8 ... Guide 9: Head receiver 10 ... Cut object 11 ... Cutter body 12 ... Head 13 ... Cutter 14 ... Cutter rotation axis 15 ... Cutter 16 ... Cutter rotation axis 17 ... Head rotation axis 18 ... Guide 19: Head receiver 20 ... Cut object 21 ... Cut object 22 ... Head receiver 23 ... Cutter 24 ... Cutter rotation axis 30 ... Movable arm A 31 ... Long arm 32: Head receiver 33: Cylinder receiver 34 ... Cylinder 35 ... Cutter body 36 ... Head 37 ... Cutter 38 ... Cutter 39 ... Rotary axis 40 ... Movable arm B 41: Head receiver 42 ... Rack shaft 43 ... Cylinder receiver 44 ... Cutter unit 45 ・ ・ ・ Pinion receiver 46 ... Pinion 47 ... Rack section 48 ... Sliding mechanism 50: Movable cutter body 51 ... Head 52 ... Rotary axis 53 ... Cutter 54 ... Cutter 55 ... Cut object 56 ... Cutting device 57 ... Unit rotation axis 58: Motor 59 ... Frame 60 ... Rotary table 61 ... Mount 62 ... Center of rotation

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) B23D 21/00 B23D 21/00 520 B26D 3/16

Claims (4)

(57) [Claims] 1. A device for cutting a rotating object to be cut, comprising two movable members connected to a cylinder and cooperating by a sliding mechanism.
Before around the rotation center point of the two heads head arm
Serial provided rotatably against the movable arms, on each of the two heads, the two cutter is provided rotatably with respect to each of the head, the center of rotation and the head of the head The rotation center point of each of the two cutters provided is arranged so as to draw a substantially isosceles triangle, the rotating planes of the four cutters are the same plane, and the rotation of the object to be cut is the The object to be cut is obtained by mounting it on a rotary table provided in the cutting device, and the distance between one head and the rotation center point of the object to be cut, the other head and the object to be cut. while maintaining equal properly and the distance between the rotational center point, the object to be cut by the cylinder
By applying a pressing force to the object, the object to be cut whose circumferential cutting surface is elliptical or irregular
A cutting device that is capable of cutting. 2. The cutting device according to claim 1 , wherein:
Of the two movable arms, one movable arm has a plurality of long arms having a rack portion , the other movable arm has a plurality of rack shafts, and the rack portion and the rack shaft are respectively engaged by pinions. By combining them, the distance between the one head and the center of rotation of the object to be cut and the distance between the other head and the center of rotation of the object to be cut are kept equal. Cutting device. 3. The cutting device according to claim 2 , wherein the one movable arm has one head receiver to which the one head is rotatably mounted, and a pair of long arms. And one cylinder receiver, and the one head receiver, one of the long arms, the one cylinder receiver and the other one of the long arms are each one side, and each side is in the order of the preceding row. The other movable arm is composed of another head receiver to which the other head is rotatably attached, another cylinder receiver, and a pair of rack shafts. One and one of the rack shafts are positioned parallel to each other and one pinion is engaged between them, and the other one of the long arms and the other one of the rack shafts are parallel to each other. The other pinion is engaged between And which, the sliding means, a pair of the long arm, a pair of the rack shaft, the cutting apparatus characterized by comprising a receiving said one pinion and said other pinion and the pinion. 4. A cutting device according to any one of claims 1 to 3, the cutter unit formed by the engagement of one movable arm and other moving arm of the two movable arms The cutting device can be lifted while being rotated around a unit rotation shaft provided in the sliding mechanism with respect to the cutting device.