JPH07115244B2 - Ring body cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to, for example, tire rims of automobiles, outer rings of rolling bearings, high pressure tower tanks, gears, flanges, etc. The present invention relates to a ring body cutting device suitable for cutting a work having a small area.

[Conventional technology]

Conventionally, in manufacturing ring bodies such as automobile tire rims, outer rings of rolling bearings, high pressure tower tanks, gears with internal or external teeth, flanges, etc., a base material (work) made of annular steel is cut by a cutting method such as race processing. I had to make it.

In this case, the work is supported and fixed using a chuck and then the tool is rotated with respect to the work to cut the wall thickness, or the ring body is gradually cut by forming a step or a curved surface. Was.

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional cutting device, when the steel material as the work has a smaller wall thickness than the size of the diameter or the cross-sectional area is small, the rigidity of the work becomes low, and therefore the chuck holding force Since the work is deformed during processing, it may not be possible to perform high-precision processing.

For this reason, conventionally, there has been a demand from the manufacturing side that the cutting amount into the work by the tool and the feed amount of the tool have to be conservative as much as possible, and the cutting work has been inefficient.

[Means for Solving the Problems]

The present invention has been made in view of the above points, and a chucking mechanism portion that supports a ring body as a work, and an inner ring body and an outer ring body that are rotatably provided in opposite directions to the ring body. , A tool provided movably in the radial direction of the inner ring body and the outer ring body, and the tools offset each other by applying rotational torques in opposite directions to the workpiece, and the resultant force of the cutting torque is offset. The means of reducing

[Work]

The work is supported and fixed on the front surfaces of the inner ring body and the outer ring body by the chucking mechanism portion, so that the workpiece is positioned substantially at the center position.

Thus, by rotating the inner ring body and the outer ring body having the tool movable in the radial direction in the directions opposite to each other with respect to the work, the work has an inner peripheral surface and an outer peripheral surface sequentially by the tool,
It will be cut.

At this time, the rotating torques in the opposite directions are imparted to the tool by rotating the inner ring body and the outer ring body in opposite directions, so that they cancel each other and the resultant force of the cutting torque is reduced.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 is a cutting device portion for cutting a steel ring body 2 as a work, and 3 is a chucking mechanism portion for positioning, supporting and fixing the ring body 2 with respect to the cutting device portion 1.

The cutting device section 1 has several sets of tools 4.5 that are movable in opposition to each other in the radial direction and are rotatable in opposite directions (clockwise and counterclockwise) with respect to the ring body 2. In addition, the inner ring body 6 and the outer ring body 7 which can be moved forward and backward in the front-back direction (axial length direction) in FIG. 1 with respect to the ring body 2, and the chuck for supporting and fixing the ring body 2 as a work. It is formed from the king mechanism unit 3.

As means for making the inner ring body 6 rotatable, a motor as a drive source provided on a moving base 9 which is movable in the front-rear direction on guide rails 8 installed on a horizontal floor surface. M ₁ , a drive gear 10 mounted on the motor shaft m ₁ of the motor M ₁ , a passive gear 11 rotatably supported by the drive gear 10 on the moving base 9, and a passive gear 11
It is formed of a cylindrical portion 13a attached to the center hole of the cylinder 12 by the key 12, and an external gear body 13b formed on the front surface of the cylindrical portion 13a and rotatable, for example, in the counterclockwise direction.

Reference numeral 14 is a planetary gear as a power transmission component for passively transmitting the rotation from the outer gear body 13b of the inner ring body 6 and transmitting the rotation to the outer ring body 7. The planetary gear 14 is the movement base 9
A plurality of bearing support parts 16 are installed on the support plate 15 erected on the inner ring body 6 at an appropriate angle so that they can be meshed with the outer gear body 13b of the inner ring body 6. The surroundings can be freely rotated while meshing with the external gear body 13b.

Reference numeral 17 denotes a mounting support plate which is mounted on the front surface of the bearing supporting component 16 by using a bolt 18 in order to rotatably mount the planetary gear 14 on the bearing supporting component 16. Reference numeral 19 is a moving means for moving the tool 5 in the radial direction.
Is a motor M ₂ as a drive source, and the cylindrical portion connected to the motor shaft m ₂ of the motor M ₂ by a coupling 20.
A connecting shaft 22 rotatably inserted into 13a via several bearings 21, 21 and a connecting shaft 22 having a bevel gear portion 22a at its tip, and a bevel gear arranged so as to substantially intersect so as to mesh with the bevel gear portion 22a. A portion 23a is provided at the tip (upper end), is rotatably accommodated in a mounting accommodating portion 24 provided on the front surface of the external gear body 13b via several bearings 25, and a screw portion 23b is provided on the inner periphery. The substantially cylindrical relay gear 23, and the elevating rod 26 having the tool 5 attached to the tip thereof and a screw portion 26a screwed to the screw portion 23b of the relay gear 23 formed in the lower half portion thereof. It is formed.

Reference numeral 27 is a support plate for supporting the lifting rod 26 so that it can be lifted and lowered on the front surface of the inner ring body 6.

28 is a moving means provided on the front surface of the outer ring body 7 in order to move the tool 4 in the radial direction in which the tool 4 substantially coincides with and opposes the tool 5, and the moving means 28 is, for example, a hydraulic cylinder 29. And the cylinder with the tool 4 attached to the tip
It is formed from 29 cylinder rods 30.

As means for movably moving the moving base 9 back and forth, a motor M ₃ as a drive source and a motor shaft m ₃ of the motor M ₃ are rotatable via a coupling 31 on the outer periphery. A connecting shaft 32 having a screw portion 32a in the
A screw portion 33a screwed to the screw portion 32a of the connecting shaft 32.
Nut material fixed to the moving base 9 by providing the
Formed with 33.

Further, the chucking mechanism 3 supports the lower surface of the ring body 2 as a work on the front surfaces of the inner ring body 6 and the outer ring body 7 so as to support the lower surface of the ring body 2 in the circumferential direction. And a tool on the inner ring body 6 and the outer ring body 7 in FIG. 1 so as to be sandwiched between the front and rear surfaces of the ring body 2.
A front part disposed substantially opposite to the front surface of the chuck main body 3A that is erected at an installation angle α of about 10 ° with respect to a horizontal plane H on which the cutting device section 1 having 4 and 5 is movable in the front-rear direction. It is formed of a holding component 35 and a rear holding component 36.

Of these, the front part pressing part 35 has several step parts 37a for supporting the front surface and the inner peripheral surface of the ring body 2 at several places,
Moreover, several chuck claws 37 concentrically provided on the front surface of the chuck body 3A at an appropriate angle so as to be movable in the radial direction according to the size of the ring body 2 and the chuck claws 37 can be moved in the radial direction. A motor M ₄ as a drive source
A bevel gear 38 for driving which is mounted on the motor shaft m ₄ of the motor M _4, meshes with the bevel gear 38 provided at the lower end a bevel gear 39a for rotatable passive and, in the outer peripheral screw portion 39b And a rotation rod 39 arranged at an equal angle as appropriate, and the screw portion 39b.
A cylindrical screw tube 40 having a screw portion 40a that is screwed into the inner periphery and the chuck claw 37 provided on the front surface, and a projection 37b protruding outside the chuck claw 37 for slidable insertion. It is formed of a support plate 41 having a guide groove 41a.

The chuck body 3A is erected at an installation angle α of about 10 ° with respect to the horizontal plane H because the ring body 2 is supported by the chucking mechanism portion 3 and the cutting device is tilted when the ring body 2 is tilted. In order to prevent the rolling of a person in the circumferential direction by tilting to the side of the section 1 and to ensure safety, cutting scraps generated by cutting the inner and outer tools 4 and 5 with respect to the ring body 2 To improve the machining accuracy by facilitating the elimination of the slag and reducing the influence during the cutting, and to maintain the accuracy during the movement of the moving base 9 with respect to the chucking mechanism section 3 due to the generation of cutting chips. The space K for exclusion, which is wider than the upper part, is provided below the direction. Further, the rear pressing member 36 is rotatably attached to the front surface of the chuck body 3A so as to sandwich the front and rear surfaces of the ring body 2 in cooperation with the chuck claw 37 so as to freely rotate the shaft 42a.
A plurality of substantially L-shaped pressing arms 42 whose base ends are locked by using a cylinder, a cylinder 43 as a drive source, a cylinder rod 44 of the cylinder 43 having a rack portion 44a, and the rack portion 44a. It is formed of a passive small gear 45 coaxially attached to the shaft 42a so as to mesh with each other.

One embodiment of the present invention is configured as described above, and a case where the ring body 2 is cut and processed will be described below.

First, the lower surface of the ring body 2 as a work is supported on the front surfaces of the inner ring body 6 and the outer ring body 7 and on the support parts 34 arranged below.

Moreover, according to the diameter of the ring body 2, a motor as a drive source
The bevel gear 38 is rotated by driving M ₄ , the rotational force is transmitted to the bevel gear 39a, and the rotating rod 39 is rotated. The number of chuck claws 37 on the front surface and the inner peripheral surface of the ring body 2 is changed according to the diameter of the ring body 2 by moving the screw cylinder 40 having the screw portion 40a meshing with the screw portion 39b of the rotating rod 39. One of the steps 37a of the step is brought into contact with the ring body 2 to support the ring body 2 at several radial positions.

Next, when the cylinder 43 as a drive source is driven to extend the cylinder rod 44, the small gear 45 meshing with the rack portion 44a is rotated clockwise in FIG. 1, so that it has a substantially L shape. The pressing arm 42 is rotationally driven to come into contact with the rear surface of the ring body 2, and cooperates with the chuck claw 37 to clamp the ring body 2 from the front and rear.

In this way, the ring body 2 as a work is clamped from the front and the rear, and the lower surface is supported by the support component 34, so that the cutting device portion 1 is centered and positioned.

After that, the cylinder 43 is driven, the cylinder rod 44 is contracted, and the pinion gear 45 meshing with the rack portion 44a rotates counterclockwise, so that the holding arm 42 returns to the old position and the ring body 2 is held. Although released, the ring body 2 will be supported by several chuck claws 37 and support parts 34 until it is cut and processed.

That is, the lower surface of the ring body 2 is supported by the support component 34, and the chuck claws 37 are arranged at an appropriate angle.
Since it is supported from the inner circumference by the supporting force of the chuck claw 37 in the expanding direction, as will be described later,
It can be supported and fixed with high processing accuracy without deformation or dimensional deviation even when cutting or processing with tools 4 and 5.

When the motor M ₁ is rotated and driven, the rotational force is passively passed to the passive gear 11 via the drive gear 10, and the inner race 6 rotates, for example, in the counterclockwise direction.

Moreover, the outer ring body 7 rotates clockwise, contrary to the inner ring body 6, via the several planetary gears 14 meshing with the outer gear body 13b of the inner ring body 6.

After that, the motor M ₂ rotates and the connecting shaft
Since 22 rotates, a relay gear 23 having a bevel gear portion 23a that meshes with a bevel gear portion 22a provided at the tip of the connecting shaft 22.
Since it rotates, the screw part provided on the inner circumference of this relay gear 23
Elevating rod having a screw portion 26a meshing with 23b on its outer circumference
26 is moved in the radial direction according to the diameter of the ring body 2 set by the chucking mechanism portion 3, and the inner periphery of the ring body 2 is cut by the tool 5.

Further, since the cylinder 29 as a drive source is driven to move the cylinder rod 29a forward, the outer periphery of the ring body 2 is cut by the tool 4 attached to the tip thereof.

At this time, the tools 4 and 5, which are respectively attached to the inner ring body 6 and the outer ring body 7 which rotate in opposite directions so as to substantially face each other, apply rotational torque in opposite directions to the ring body 2 as a work. Therefore, the resultant force of the cutting torque is offset and greatly reduced.

Therefore, as described above, even if the holding force of the chucking mechanism unit 3 with respect to the ring body 2 is weak, efficient cutting can be performed by increasing the feed degree of the tools 4 and 5 and increasing the depth of cut. I can do it. At this time, tool 4,
The feed degree of 5 is such that the continuous cutting chips generated from the ring body 2 are entangled with each other and do not hinder the cutting of the ring body 2 so as to prevent the cutting chips from being continuously cut. The moving base 9 of the cutting device unit 1 is determined on the lower side of the front surface of the cutting device unit 1 in the vertical direction.
The main body portion 3A of the chucking mechanism portion 3 is arranged at an installation angle α of about 10 ° with respect to a horizontal plane H provided with a guide rail 8 that is movable in the front-rear direction. Is formed, and when the ring body 2 tilts when the ring body 2 is set on the chucking mechanism portion 3, the ring body 2 is tilted toward the cutting device portion 1 side to the front side (the side where the person is) in the circumferential direction. The tilting of the ring body 2 is prevented, safety is ensured, and cutting waste generated in the subsequent process is easily eliminated.

Further, if the tools 4 and 5 are provided so as to face each other as in this embodiment, even if a centrifugal force is applied, a well-balanced cutting and machining can be performed from the inner circumference and the outer circumference to the ring body 2 as a work. You can do it (see Figure 4).

In this case, by increasing the number of installed sets of tools 4 and 5 located on the inner circumference and the outer circumference, for example, cutting of the ring body 2 as a work is performed in accordance with differences in material characteristics, shape, thickness and the like. It can be performed more efficiently.

Further, FIG. 5 shows a motor M ₅ as a drive source as a feeding mechanism for the tools 4 and a worm 50 having the tools 4 and 5 attached to the tips thereof.
And a worm wheel 51 mounted on a motor shaft m ₅ meshed with the worm 50, showing another embodiment of the present invention. In this embodiment, the ring body 2 is cut. Even if the surface is one surface of the inner circumference or the outer circumference, by rotating the tools 4 and 5 in opposite directions with a time difference s and performing cutting, the rotational torque of the tool during cutting in the cutting of the same machining surface It is also possible to cancel each other and reduce the resultant force of the cutting torque.

After cutting and processing, the rotation of the motor M ₁ is stopped to stop the rotation of the inner ring body 6 and the outer ring body 7. After that, the motor M ₂ is rotated in the reverse direction and the cylinder 29 is driven in the reverse direction to move the tools 4 and 5 in opposite directions.

After that, the motor M ₄ is rotated in the reverse direction to rotate the bevel gear 38 in the reverse direction, and the bevel gear 39a meshing with the motor M ₄ is also rotated in the reverse direction, so that the rotating rod 39 is rotated in the reverse direction, and the screw cylinder 40 and several chuck claws 37 are centered. And move it to the ring body 2
Release support and fixation by 37.

After that, by reversing the motor M ₃ , the connecting shaft
32 is rotated in the opposite direction, the moving base 9 is retracted via the nut member 33 screwed to the screw portion 32a of the connecting shaft 32, and then cutting and processing are completed by using a hoisting and carrying device not shown. The ring body 2 is lifted and transported to a predetermined place to obtain a desired product.

In the above embodiment, the inner ring body 6 to which the tools 4 and 5 are attached and the outer ring body 7 are provided with a gear portion, and several planetary gears 14 meshing with the gear portion are used to form the inner ring body 6 and the outer ring body. Although the body 7 is rotated in opposite directions, the inner ring body 6 and the outer ring body 7 are rotationally driven in opposite directions. The power transmission components may be used to rotate and drive the motors in the opposite directions by the dedicated motors. Further, the mounting positions and the number of the tools 4 and 5 are not limited to those in the above embodiment.

〔The invention's effect〕

As described above, according to the present invention, by rotating the respective tools attached to the inner ring body and the outer ring body in opposite directions,
Rotating torques in opposite directions are applied to the tools to cancel each other,
Since the total force of the cutting torque can be reduced, it is possible to achieve high accuracy without deforming the workpiece with low rigidity such as thin wall thickness or small cross-sectional area compared to the diameter size by strengthening the holding force of the chuck. Can be cut and processed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the cutting device of the present invention, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG. 3 is a sectional view taken along the circle in FIG. FIG. 4 is an explanatory front view showing a use state, and FIG. 5 is an explanatory front view showing a use state in another embodiment. 1 ... Cutting device section, 2 ... Ring body, 3 ... Chucking mechanism section, 4, 5 ... Tool, 6 ... Inner ring body, 7 ... Outer ring body.

Claims (6)

[Claims] 1. A chucking mechanism portion for supporting a ring body as a work, an inner ring body and an outer ring body rotatably provided in opposite directions to the ring body, and an inner ring body and an outer ring body. A ring which is provided so as to be movable in the radial direction, and the tools cancel each other by applying a rotational torque in the opposite direction to the work to reduce the resultant force of the cutting torque. Body cutting device. 2. The inner ring body and the outer ring body are formed by an outer gear and an inner gear, and the outer gear and the inner gear are rotatably arranged in opposite directions via a planetary gear. The cutting device for a ring body according to claim 1, wherein 3. The chucking mechanism portion is disposed on the front surface of the inner ring body and the outer ring body in the circumferential direction and downward, and supports the inner periphery of the ring body and a support component that supports the lower surface of the ring body. The cutting device for a ring body according to claim 1, comprising a chuck claw provided at an appropriate angle. 4. The chuck claws of the chucking mechanism section are
A plurality of stepped portions which are provided so as to be movable in the radial direction by a driving force of a motor in accordance with the size of the diameter of the ring body and which can come into contact with the front surface and the inner peripheral surface of the ring body. A cutting device for a ring body according to claim 1. 5. The chucking mechanism part is a substantially L-shaped pressing arm rotatably supported so as to support the ring body from the front and rear surfaces in cooperation with a chuck claw, and the pressing arm is powered. The cutting device for a ring body according to claim 1, comprising a cylinder as a drive source for rotating and driving through a transmission component. 6. The cutting is performed by arranging the chuck main body of the chucking mechanism section at a predetermined angle with respect to a horizontal plane on which a cutting device section having a tool for the inner ring body and the outer ring body is provided so as to be movable in the front-rear direction. The cutting device for a ring body according to claim 1, wherein a space for removing cutting chips is formed vertically below the device part.