JPH07115241B2 - 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.

[Prior Art] Conventionally, for 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., race processing of a base material (work) made of annular steel It was sometimes produced by a cutting method such as.

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 it to reduce the wall thickness, or the ring body is gradually cut by forming steps or curved surfaces. 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 is contradictory to the first and second chucking mechanism portions that selectively support the front and rear of the outer peripheral surface of the ring-shaped work, and the work. An inner ring body and an outer ring body rotatably provided in a direction, and a tool movably provided in the inner ring body and the outer ring body in a radial direction and for cutting the inner and outer peripheral surfaces and side surfaces of the work. By applying a rotational torque in the opposite direction to the work, the two are offset by each other to reduce the resultant force of the cutting torque.

[Work]

The front of the outer peripheral surface of the work is supported and fixed by the first chucking mechanism portion so that the work is positioned substantially at the center position.

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 its inner peripheral surface and outer peripheral surface cut. After that, the rear of the outer peripheral surface of the work is supported and fixed by the second chucking mechanism portion, so that the work is sequentially cut from the opposite side of the outer peripheral surface.

At this time, since the inner ring and the outer ring rotate in opposite directions to each other, rotational torques in opposite directions are applied, so that the tools for cutting the outer peripheral side and the inner peripheral side of the workpiece cancel each other out. The resultant torque is reduced.

〔Example〕

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

1,1 'is a steel ring-shaped ring body 2 as a workpiece
The cutting device parts 1 and 1 ′ are for cutting the first and second chucks that selectively support the front and rear of the outer peripheral surface of the ring body 2 as the cutting process progresses. It is installed so as to face the front and rear surfaces of the king mechanism parts 3 and 4.

The cutting device section 1, 1'is provided with a tool 5A for cutting the inner peripheral surface of the work, which is movable so as to be substantially opposed in the radial direction.
5'A; 5B, 5'B, a tool 6 for cutting the outer peripheral surface of the work, and several sets of tools 7, 7'for cutting the front and rear side surfaces of the work are provided, and the ring body is provided. The inner ring body 8 and the outer ring body, which are rotatable in opposite directions (clockwise and counterclockwise) with respect to 2, and are further movable in the front-rear direction (axial length direction) in FIG. 1 with respect to the ring body 2. Body 9
And the chucking mechanism portions 3 and 4 for supporting and fixing the ring body 2 as a work.

As means for making the inner ring body 8 rotatable, a motor provided as a drive source provided on a moving base 11 which is movable in the front-rear direction on guide rails 10 installed on a horizontal floor surface. M ₁ , a drive gear 12 mounted on the motor shaft m ₁ of the motor M ₁ , a passive gear 13 rotatably supported on the moving base 11 by the drive gear 12, and the passive gear
A cylindrical portion 15a attached to the center hole of 13 by the key 14,
The external gear body 15b is formed on the front surface of the cylindrical portion 15a and is rotatable in the counterclockwise direction, for example.

Reference numeral 16 is a planetary gear as a power transmission component for passively transmitting the rotation from the outer gear body 15b of the inner ring body 8 and transmitting the rotation to the outer ring body 9, and the planetary gear 16 is the moving base 11
A plurality of bearing support parts 18 are installed on the support plate 17 which is erected on the inner ring body 8 at an appropriate angle so as to be meshed with the outer gear body 15b of the inner ring body 8. The surroundings can be freely rotated while meshing with the external gear body 15b.

Reference numeral 19 denotes a mounting support plate which is mounted on the front surface of the bearing supporting component 18 by using a bolt 20 in order to rotatably mount the planetary gear 16 on the bearing supporting component 18.

21,21 'is a number provided in the inner ring bodies 8,8 of the cutting device section 1,1' at a proper angle so as to cut the inner peripheral surface of the workpiece from the front and the back in accordance with the cutting process. A tool unit for making the above-mentioned tools 5A, 5'A freely movable in the radial direction. The tool units 21, 21 'are cylinders 22, 23 as drive sources and cylinders of the cylinders 22, 23. Swing arms 24, 25 in which substantially central vertex portions 24a, 25a are swingably pivotally attached to rods 22a, 23a by a shaft 26, and swing arms 24, 25
Is biased by the push rollers 27, 27 mounted on the front arm portions 24b, 25b of the tool via tension springs 28, and the tips of the tools 5A, 5'A are
And the tool mounting rods 29 and 30 to which the above are mounted. The rear ends of the tool mounting rods 29 and 30 are pivotally attached to the mounting portions 31 projecting from the front surfaces of the inner ring bodies 8 and 8 by means of shafts 32.

33 is also the above-mentioned tool 5 for cutting the inner peripheral surface of the workpiece.
B, 5'B is a tool unit that can be moved in the radial direction. This tool unit 33 includes a motor M ₂ as a drive source and a coupling 34 on a motor shaft m ₂ of the motor M _2. The shaft is connected and rotatably inserted into the tubular portion 15a through several bearings 35, 35, and a connecting shaft 36 having a bevel gear portion 36a at its tip and a meshing engagement with the bevel gear portion 36a. The bevel gear portion 37a arranged at the tip (upper end) is rotatably accommodated in the mounting accommodating portion 38 provided at the front surface of the external gear body 15b through several bearings 39, Has a substantially cylindrical relay gear 37 provided with a screw portion 37b, and the tools 5B and 5B 'are attached to the tip of the relay gear 37, and a screw portion which is screwed to the screw portion 37b of the relay gear 37 in the lower half portion. Four
It is formed from the elevating rod 40 on which 0a is formed.

Reference numeral 41 is a support plate for supporting the lifting rod 40 so as to be lifted and lowered on the front surface of the inner ring body 6.

Reference numeral 42 denotes a tool unit provided on the front surface of the outer ring body 9 for allowing the tool 6 to move in a radial direction substantially corresponding to and opposed to the tool 5'A, and the tool unit 42 is the tool unit. Similarly to 21 ', for example, a hydraulic cylinder 43 as a drive source, and a cylinder rod 43 of the cylinder 43
The apex portion 44a at the center of a is swingably attached to the swing arm 44 by a shaft 44b, and a tension spring 45 biases the swing arm 44 toward the front arm portion 44c of the swing arm 44, and The tool 6 is formed of a tool mounting rod 46 to which the tool 6 is detachably mounted. The rear end portion of the tool mounting rod 46 is used for a shaft 47, and is attached to a mounting portion 48 projecting from the front surface of the outer ring body 9 so that the tool mounting rod 46 can be raised and lowered against the biasing force of the tension spring 45. It is pivotally supported. In FIG. 1, the tool unit 42 is shown only on the cutting device section 1 side, but the tool unit 42 is also provided on the cutting device section 1 ′ side with the linder body 2 as a work sandwiched therebetween.

A plurality of 50 are movably provided on the front surface of the inner ring bodies 8 and 8 in order to allow the tools 7 and 7'to move in the radial direction so as to cut the front and rear side surfaces of the ring body 2 as a work. This is a tool unit for side cutting.
50 and 50 are, for example, a cylinder 51 as a drive source, a rail member 52 provided on the front surface of the inner ring body 8 so as to have rail groove portions 52a on the left and right side surfaces, and the rail groove portion of the rail member 52.
52a, 52a slidably fitted to the holding blades 53a, 53a provided on the left and right sides, driven by the cylinder 51, and formed at the tip with a carrier 53 to which the tools 7, 7'are attached. It

As means for movably moving the movable base 11 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 C, and the outer circumference is A connecting shaft 54 having a screw portion 54a in
A screw portion 55a that is screwed into the screw portion 54a of the connecting shaft 54.
Is provided on the inner circumference of the movable base 11, and is formed of a nut material 55 fixed to the movable base 11.

Further, the chucking mechanism portions 3 and 4 cut the front outer peripheral surface or the rear outer peripheral surface of the ring body 2 as a work on the front outer periphery of the inner ring body 8 and the outer ring body 9 as the cutting process by the tool 6 progresses. A motor M ₄ as a drive source mounted by a frame (not shown) in the centripetal direction so as to selectively support at several points by changing the support position,
A screw portion 56 formed on the outer periphery of the motor shaft m ₄ of the motor M ₄ and a female screw portion 57a screwed to the screw portion 56 are provided on the inner periphery, and the left and right outer sides are workpieces to be processed. And a chuck claw 57 having a plurality of step portions 57b for supporting the ring body 2 according to the difference in diameter.

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

Cutting device parts arranged facing each other as shown in the previous figure and FIG.
When several motors M _{4 of} the first chucking mechanism unit 3 arranged in the outer peripheral direction of the approximately middle portion of 1,1 ′ are driven, the screw portion 56 provided on the outer periphery of the motor shaft m ₄ is driven. Female thread 57a
The chuck claws 57 screwed together move in the radial direction toward the center and support the front of the outer peripheral surface of the ring body 2 as a work at several points.

In this way, the ring body 2 as a work is supported by the first chucking mechanism portion 3 at several points in front of the outer peripheral surface thereof, and is centered with respect to the left and right cutting device portions 1 and 1 '. Is positioned.

When the motor M ₁ is rotated and driven, the rotational force is passively passed to the passive gear 13 via the drive gear 12, and the cutting device section 1,
The inner ring 8 of 1'rotates, for example, in the counterclockwise direction. Moreover, the outer ring body 9 rotates in the clockwise direction, contrary to the inner ring body 8, through several planetary gears 16 meshing with the outer gear body 15b of the inner ring body 8.

After that, as one method, since the connecting shaft 36 is rotated by rotating the work M ₂ of any of the cutting device parts 1 and 1 ′, it is meshed with the bevel gear part 36 a provided at the tip of the connecting shaft 36. When the relay gear 37 having the bevel gear portion 37a rotates, the screw portion provided on the inner circumference of the relay gear 37
A lifting rod having a screw portion 40a engaging with 37b on its outer circumference
40 is moved in the radial direction according to the difference in the diameter of the ring body 2 whose outer periphery and front are supported by the first chucking mechanism portion 3. Moreover, the connecting shaft 54 of this motor M ₃
When the moving base 11 screwed into the screw portion 54a is moved forward by the rotation of, the inner circumference of the ring body 2 is cut by the tool 5B or the tool 5'B from the front to the rear or from the rear to the front. .

Another method for cutting the inner peripheral surface of the work is to drive the cylinders 22 and 23 of one of the tool units 21 and 21 'of the cutting device section 1 and 1'to drive the cylinder rod 2
When 2a and 23a extend, the respective cylinder rods 22a and 23a
The swing arm 2 in which the apex angles 24a and 25a are pivotally attached to each other by a shaft 26
4, 25 of the front arm portion 24b, and the move is pressed radially to the distal end side of the tool mounting rod 29, 30 by pressing rollers 27 against the tensile force of the 25b side tension spring 28, the rotation of the motor M ₃ Since the connecting shaft 54 is rotated by this to advance the moving base 11 having the nut material 55 screwed to the screw portion 54a, the inner peripheral surface of the ring body 2 is either the tool 5A or 5'A. Be cut by.

Further, when cutting the outer peripheral surface of the work, the cylinder rod 43 of the cylinder 43 of the tool unit 42 of the cutting device section 1
A swing arm 44 in which the apex angle portion 44a is pivotally attached to a by a shaft 44b.
Of the tool mounting rod 46 is moved counterclockwise (radially) toward the center by the pressing roller against the tensile force of the tension spring 45, and is moved by the drive of the motor M _3. Since the base 11 is moved forward, as described above, the ring body 2 whose outer peripheral surface and front surface are supported by the first chucking mechanism portion 3 has the outer peripheral surface of FIG. 1 cut from the rear to the front. To be done.

Further, since the cylinder 51 as a drive source is driven to move the cylinder rod forward, the tool 7'attached to the tip thereof causes the first chucking mechanism portion 3 to move the front outer peripheral surface as shown in FIG. The outer surface on the rear side of the ring body 2 on which is supported is cut and chamfered.

At this time, tools 5A and 5'A for different uses for cutting the inner and outer peripheral surfaces, which are attached so as to face the inner ring body 8 and the outer ring body 9 which rotate in opposite directions of clockwise and counterclockwise, respectively.
5B, 5'B; 6 or the side cutting tool 7'will give rotational torques in mutually opposite directions to the ring body 2 as a workpiece, so the resultant cutting torque is canceled out and greatly reduced. To be done.

Therefore, as described above, even if the chuck claw 57 of the chucking mechanism section 3 has a weak holding force for the ring body 2, the feed degree of the tools 5A, 5'A; 5B, 5'B;6; 764 By increasing the cutting depth to increase the cutting depth, efficient cutting can be performed.

Further, if the tools 5A, 5'A; 5B, 5'B;6;7'are provided so as to face each other as in this embodiment, the ring body 2 as a workpiece can be treated even if centrifugal force acts. From the inner and outer circumference,
Can perform well-balanced cutting and machining (see Fig. 1 and Fig. 2).

In this case, tools 5A, 5'A; 5B, located on the inner and outer circumferences
By increasing the number of installed groups of 5'B;6; 7 ', it is possible to more efficiently perform the cutting process of the ring body 2 as a work, for example, in accordance with the difference in the characteristics, shape, thickness, etc. of the material. You can

In this way, after the inner peripheral surface and the outer peripheral surface of the ring body 2 are cut and processed by leaving the supporting portion of the outer peripheral surface by the first chucking mechanism portion 3, the inner ring body 8 is stopped by stopping the rotation of the motor M _1. And the rotation of the outer ring body 9 is stopped. Then rotate the motor M ₂ in the opposite direction and
Cylinders 22,23; 43 of 21,21 '; 42 are driven in reverse and the tool 5
Move A, 5'A; 5B, 5'B;6,; 7 'in a direction away from the work.

Thereafter, the motor M ₄ is rotated in the reverse direction, and the motor shaft m ₄ is rotated in the reverse direction to move the first chuck claw 57 having the female screw portion 57a screwed to the screw portion 56 formed on the outer periphery thereof in the radial direction. The support of the chuck claw 57 for the work is released.

Then, this time by rotating and driving the motor shaft m ₄ of the motor M _4, the female screw portion to which the screw portion 56 is screwed
By moving the chuck claw 57 of the second chucking mechanism part 4 having the same structure as the first chucking mechanism part 3 having 57a in the radial direction toward the center, the chuck claw of the second chucking mechanism part 4 is formed. 57, the outer circumference of the ring body 2 as a workpiece that has been cut by the tool 6 of the tool unit 42,
Support the rear part in several places. Similarly, although not shown in the drawing, by driving the cylinder rod 43a of the cylinder 43 of the tool unit 42 in the cutting device part 1'provided on the opposite side of the ring body 2 as the work as in the cutting device part 1. By rotating the tip end side of the swing arm 44 against the tensile force of the tension spring 45 in the counterclockwise direction in FIG. The remaining portion (a portion having a width corresponding to a supporting portion by the chuck claw 57 of the first chucking mechanism portion 3) is cut.

At the same time, by driving the cylinder 51, the tool 7 attached to the tip of the cylinder rod is driven in the radial direction to cut the front side surface of the ring body 21 as a workpiece to perform chamfering.

After that, the connecting shaft 54 is rotated in the reverse direction by reversing the motor M ₃ of the cutting device section 1, 1 ′.
The movable base 11 is retracted via a nut material 55 having a screw portion 55a screwed to the screw portion 54a of 54, and the work is tightened by the chuck claws 57 of the second chucking mechanism portion 4 and then shown in the figure. The ring body 2 that has been cut and processed is hoisted by using a hoisting and carrying device, and is carried to a predetermined place to obtain a desired product.

In the above embodiment, the tools 5A, 5'A; 5B, 5'B; 7,
A gear portion is provided on the inner ring body 8 to which 7'is attached and an outer ring body 9 to which the tool 6 is attached, and several planetary gears 16 meshing with the gear portion are used to form the inner ring body 8 and the outer ring body 9. Are rotated in opposite directions. As means for rotationally driving the inner ring body 8 and the outer ring body 9 in opposite directions,
It is not always necessary to use the planetary gear 16 and other power transmission components such as a belt may be used to rotate and drive the motors in the opposite directions by dedicated motors. Further, the mounting positions and the number of the tools 5A, 5'A; 5B, 5'B; 7, 7'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 cross-sectional view showing an embodiment of the cutting device of the present invention, and FIG. 2 is a front view of a cutting device part constituting the present embodiment. 1,1 '... Cutting device part, 2 ... Ring body, 3 ... First chucking mechanism part, 4 ... Second chucking mechanism part, 5A, 5'A; 5B, 5'B;6; 7,7 '... Tool, 8 ... Inner ring, 9 ... Outer ring.

Claims (3)

[Claims] 1. A first and a second chucking mechanism portions for selectively supporting the front and rear of the outer peripheral surface of a ring-shaped work, and an inner ring rotatably provided in opposite directions to the work. A body and an outer ring body, and a plurality of tools movably provided in the inner ring body and the outer ring body in the radial direction and for cutting the inner and outer peripheral surfaces and the side surfaces of the work respectively, and the tool with respect to the work A cutting device for a ring body, which is characterized by reducing the resultant force of the cutting torques by canceling each other by applying rotational torques in opposite directions. 2. The inner ring body and the outer ring body are rotatably opposed to each other before and after the first and second chucking mechanism parts, and the inner ring body and the outer ring body have inner and outer peripheral surfaces of a work and 2. The ring body cutting device according to claim 1, wherein the plurality of tools for cutting the side surfaces are provided movably in the radial direction. 3. A tool for cutting the inner and outer circumferences of a work, comprising: a cylinder as a drive source; and a swing arm having a substantially central apex portion swingably mounted on a cylinder rod of the cylinder. 2. The ring according to claim 1, wherein the ring is detachably attached to the tool attachment rod of a tool unit including a tool attachment rod urged by a tension spring on the forearm side of the swing arm. Body cutting device.