JPH0673765B2 - Rotary processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention relates to a rotary machining apparatus, and more particularly to a rotary machining apparatus capable of changing a machining diameter with a single cutting tool.

(2) Conventional Technology Conventionally, in order to change the machining diameter, there is a tool that uses a cutting tool suitable for the machining diameter or that changes the X and Y axes by numerical control.

(3) Problems to be Solved by the Invention However, in the case of exchanging the cutting tool, the exchanging work takes time and the work efficiency is inferior, and in the case of numerical control, the device becomes complicated and expensive. Is.

A first object of the present invention is to provide a rotary machining apparatus capable of easily changing a machining diameter by causing a cutting tool to revolve while revolving on a revolution orbit having a variable raceway diameter.

A second object of the present invention is to provide a rotary machining device having a simplified structure of the mechanism for changing the diameter of the track after achieving the first object.

B. Structure of the Invention (1) Means for Solving Problems The first device of the present invention comprises a fixed frame body; an orbital spindle which is basically cylindrical and rotatably supported by the frame body. A cylindrical housing eccentrically arranged in the revolving spindle; a rotation spindle rotatably supported by the housing about the same axis; a blade attached to the tip of the rotation spindle; A swing arm having one end supported by a revolution spindle and an intermediate part connected to a housing so as to be rotatable about an axis parallel to the axis; a first drive wheel fixedly mounted on the revolution spindle; A second drive wheel mounted on the revolving spindle; a link connecting the second drive wheel and the swing arm; a rotation connected to the rotation spindle via a universal joint. A dynamic motor; a revolution drive motor connected to the first drive wheel; a second drive wheel that displaces the second drive wheel relative to the first drive wheel in a relative angular manner and at the same rotation speed as the first drive wheel. And an adjustment drive source that is allowed to rotate and is connected to the second drive wheel.

In addition, in the device of the second aspect of the present invention, in addition to the main components of the first aspect of the invention, the revolution drive motor is provided with the first transmission mechanism through the first transmission mechanism.
The second transmission mechanism, in which the drive wheels are coupled, is coupled in the middle of the first transmission mechanism, and the third transmission mechanism, which is coupled to the second drive wheel, cause relative angular displacement in the first and second drive wheels. To this end, the output side of the differential gear mechanism is connected, and the stepping motor is connected to the input side of the differential gear mechanism.

(2) Operation According to the configuration of the first aspect of the invention, when the adjusting drive source causes relative angular displacement to the second drive wheel and the revolution spindle, the swing arm swings due to the link, and the rotation spindle moves to the revolution spindle. Deviate from the axis. When the rotation drive and revolution drive motors are operated in this state, the rotation spindle, that is, the cutting tool, rotates while revolving on the revolution orbit and operates.

According to the structure of the second invention, in addition to the operation of the first invention, the stepping motor is actuated so as to be relatively opposed to the revolution spindle and the second drive wheel via the differential gear mechanism and the second and third transmission mechanisms. Angular displacement can be generated, the mechanism is simple, and the amount of eccentricity can be arbitrarily adjusted to easily cope with changes in the machining diameter.

(3) Embodiment Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIG. 1, FIG. 2 and FIG. 3, this rotary processing device includes a fixed frame body 1 and an orbiting spindle 2.
A housing 3, a rotation spindle 4, a cutter 5 as a cutting tool, a pair of swing arms 6, a first pulley 7 as a first drive wheel, and a second pulley 8 as a second drive wheel. And a pair of links 9 connecting the second pulley 8 and the swing arm 6, a rotation drive motor 11 connected to the rotation spindle 4 via a universal joint 10, and a first pulley via a first transmission mechanism 12. An orbital drive motor 13 connected to 7,
A second transmission mechanism 14 connected in the middle of the first transmission mechanism 12,
A third transmission mechanism 15 connected to the second pulley 8, a differential gear mechanism 16 connected to the second and third transmission mechanisms 14 and 15,
A stepping motor 17 as an adjustment drive source connected to the differential gear mechanism 16 is provided.

The frame body 1 is fixed on a base plate 18. The frame body 1 has both ends projecting laterally from each other. It is rotatably supported around a horizontal axis.

In the revolution spindle 2, a cylindrical housing 3 is arranged with its axes parallel to each other, and the housing 3 is eccentric in the revolution spindle 2. A rotation spindle 4 is rotatably supported on the housing 3 through a pair of bearings 21, 22 and sealing members 23, 24 so as to be rotatable about the same axis, and a cutter 5 is attached to the tip of the rotation spindle 4 protruding from the housing 3. Is installed. Further, one end of the universal joint 10 is connected to the rear end of the rotation spindle 4 protruding from the housing 3. On the other hand, a rotation drive motor 11 having an output shaft 26 parallel to the rotation spindle 4 is fixed to a support frame 25 fixed on the base 18 at the rear of the frame 1 (on the right side in FIG. 1). A transmission shaft 27 rotatably supported by a support frame 25 below the rotation drive motor 11 and the output shaft 26 are connected via pulleys 28 and 29 and an endless belt 30. Moreover, the transmission shaft 27 is connected to the rotation spindle 4 via the universal joint 10. Therefore, according to the operation of the rotation drive motor 11, the rotation spindle 4 rotates about the axis,
The eccentricity of the housing 3, that is, the rotation spindle 4 in the revolution spindle 2 is also allowed by the universal joint 10.

Both swinging arms 6 are arranged at both ends of the housing 3, and one end of each swinging arm 6 is arranged parallel to the axis of the housing 3 on a swinging shaft 31 planted in the revolution spindle 2 and a bearing 32. Each is supported through. Therefore, each swing arm 6 is rotatable around an axis parallel to the axis of the rotation spindle 4, and one end of the swing arm 6 is supported by the revolution spindle 2.
Fixedly connected to.

The first pulley 7 is concentrically fixed to the rear end of the revolution spindle 2. On the other hand, the second pulley 8 is formed to have the same diameter as the first pulley 7, and the bearings 33 are provided at both ends of the revolution spindle 2.
It is installed via each. Therefore, the first pulley 7 and the pair of second pulleys 8 are relatively rotatable.

Each second pulley 8 is provided with a pin 34 in parallel with its axis, and the other end of each swing arm 6 is provided with a pin 35 in parallel with the pin 34. The link 9 connects the other end of the swing arm 6 and the second pulley 8 via the pins 34 and 35.

With such a configuration of the swing arm 6 and the link 9,
When the revolution spindle 2 and the second pulley 8 are displaced relative to each other, as shown in FIG. 2, from the state in which the axes of the housing 3 and the rotation spindle 4 coincide with the axis of the revolution spindle 2, as shown in FIG. As shown, the axes of the housing 3 and the rotation spindle 4 deviate from the axis of the revolution spindle 2, and the rotation spindle 4 is eccentric in the revolution spindle 2.

At the top of the frame 1, the output shaft 36 parallel to the revolution spindle 2
The orbital drive motor 13 having is fixed. The output shaft 36 of the revolution drive motor 13 and the first pulley 7 form the first transmission mechanism 12
Are connected via.

The first transmission mechanism 12 includes a third pulley 37 that is rotatably supported by the frame 1 around an axis parallel to the first pulley 7, and a revolution drive pulley 38 that is fixed to the output shaft 36. An endless first toothed belt 39 wound around the first pulley 7, the third pulley 37 and the revolution driving pulley 38, and the first toothed belt between the revolution driving pulley 38 and the third pulley 37. 39 is also wound around a tension pulley 40 rotatably supported by the frame body 1.

The third pulley 37 is fixed to one end of a cylindrical first rotating shaft 41, and the rotating shaft 41 allows the third pulley 37 to project outward so that a pair of bearings 42 is provided. It is rotatably supported by the frame body 1 through.

The frame 1 has a second rotary shaft 43 parallel to the first rotary shaft 41.
Is rotatably supported by bearings 44 and 45, and the first gear 46 rotatable about the axis of the second rotating shaft 43.
And is fixed to the inner end of the first rotating shaft 41 and
With the second gear 47 that meshes with the gear 46, the second transmission mechanism 14
Is configured.

A third pulley 51 is fixed to both ends of a third rotary shaft 48 which is supported by the first rotary shaft 41 through a bearing 49 and supported by the frame 1 through a bearing 50. 4th pulley 51, each 4th pulley 51 and each 2nd pulley 8
A pair of endless second toothed belts 52 wound around, a third gear 53 rotatable around the axis of the second rotating shaft 43, and a third gear 53 fixed to an intermediate portion of the third rotating shaft 48. The third transmission mechanism 15 is configured by the fourth gear 54 meshing with the third gear 53.

The pair of fourth pulleys 51 are formed to have the same diameter as the third pulley 37. The fourth gear 54 is formed to have the same diameter as the second gear 47 and the same number of teeth. Furthermore, the third gear 53
Has a slightly larger number of teeth than the first gear 46, for example, the first gear
When the number of teeth of the gear 46 is 100, the number of teeth of the third gear 53 is 101.

The differential gear mechanism 16 is a conventionally known one and has a second rotary shaft.
An elliptical cam 55 fixed to 43, a pair of ball bearings 56 fitted to the outer circumference of the cam 55, and a thin metal elastic member having teeth on the outer circumference and fitted to the outer ring of the ball bearing 56. It comprises a ring 57 and first and second rings 58, 59 having internal teeth which mesh with the external teeth of the elastic ring 57. The metal elastic ring 57 has an elliptical shape when fitted to the ball bearing 56, and the first and second rings 58 and 59 mesh with the metal elastic ring 57 at two points on one diameter line thereof. Moreover, a metal elastic ring
The outer teeth of 57 and the inner teeth of the first ring 58 are the first number of teeth, and the number of the inner teeth of the second ring 59 is slightly larger. For example, when the number of inner teeth of the first ring 58 and the number of outer teeth of the metal elastic ring 57 is 200, the number of inner teeth of the second ring 59 is 202.

The differential gear mechanism 16 decelerates the power of the second rotary shaft 43 when the second rotary shaft 43 is rotationally operated, and reduces the power of the first and second rings 58,5.
9, the rotation speed of the second ring 59 is the first ring 58.
Slightly later than.

A first gear 46 having bearings 60 and 61 interposed between the first ring 58 and the second rotating shaft 43 and the cam 55 is fixedly mounted, and a second ring 59 includes the second rotating shaft 43 and the cam 55. Bearings between 62,6
The third gear 53 with 3 interposed is fixed. Therefore, the rotation of the second rotary shaft 43 causes the differential gear mechanism 16 and the second transmission mechanism 14 to rotate.
While being transmitted to the first pulley 7 via the first transmission mechanism 12 and transmitted to both the second pulleys 8 via the differential gear mechanism 16 and the third transmission mechanism 15, the first pulley 7, that is, the revolution. The angular displacement speed of the spindle 2 is slightly faster than the angular displacement speed of the second pulley 8. That is, in FIG. 2, when the second rotary shaft 43 rotates, the first and third gears 46 and 53 also rotate in the same direction, and the third pulley 37 is angularly displaced around the first rotary shaft 41. At the same time, the fourth pulley 51 is angularly displaced by a smaller angular displacement amount. In response to this, the first pulley 7 and the revolution spindle 2 are angularly displaced by the angular displacement amount α, and the second pulley 8 is angularly displaced by the angular displacement amount β smaller than the angular displacement amount α. Therefore, the revolution spindle 2
A relative angular displacement amount γ is generated between the second pulley 8 and the second pulley 8, and the swing arm 6 is rotated by the link 9 in accordance with the relative angular displacement, and as shown in FIG. It is eccentric from the axis of the revolution spindle 2 by a displacement amount ε.

By the way, when the revolution spindle 2 rotates while the second rotating shaft 43 is stopped, power is transmitted from the second transmission mechanism 14 to the second pulley 8 via the differential gear mechanism 16 and the third transmission mechanism 15. However, the combination of the number of meshing teeth of the transmission mechanisms 14 and 15 and the differential gear mechanism 16 is set so that the revolution speeds of the revolution spindle 2 and the second pulley 8 at this time are the same.

The stepping motor 17 has an output shaft parallel to the second rotation shaft 43.
It has 64 and is fixed to the upper part of the frame 1. Moreover, the output shaft
An adjustment drive pulley 65 is fixedly installed on the frame 64, and the frame 1
The fifth pulley 66 fixed to the end of the second rotary shaft 43 protruding from the second drive shaft 65 and the adjustment drive pulley 65 have an endless third
The toothed belt 67 is wound around.

By the way, when the orbiting spindle 4 is rotated while the orbiting spindle 2 is being rotated in a state of being eccentric in the orbiting spindle 2, the bearings 19 and 20 are unevenly worn, rattling noise is generated, and machining accuracy is increased. An automatic balancing device 70 is arranged between the housing 3 and the revolution spindle 2 as it has a negative effect.

In FIG. 5, an automatic balancer 70 includes an annular balance weight 71 surrounding the revolution spindle 2, a link mechanism 72 connecting the housing 3, the revolution spindle 2 and the balance weight 71, the revolution spindle 2 and the balance weight. 71 and a supporting arm 73 that connects the 71 to each other.

The balance weight 71 is formed in the shape of a thick short cylinder surrounding the revolution spindle 2. Further, the support arm 73 starts from the outer surface on the opposite side of the swing shaft 31 supporting the swing arm 6 when the revolving spindle 2 and the revolving spindle 4 are in the concentric position from the previous revolving spindle 2 and the revolving spindle 4. Of the revolving spindle 2 projecting outward along an imaginary line connecting the axis of the revolving shaft 31 and the oscillating shaft 31, and the outer end of the support arm 73 is provided with a shaft 74 having an axis parallel to the revolving spindle 2. It is connected to the balance weight 7.

The link mechanism 72 includes a support projection 75 provided on the housing 3 so as to project therefrom.
First connecting rod 77, one end of which is connected to the tip of the pin via a pin 76
An intermediate portion pivotally supported by the revolving spindle 2 via a pin 78 and a swing rod 80 having one end connected to the other end of the first connecting rod 77 via a pin 79; The second connecting rod 83 is connected to the other end of the swing rod 80 via the other end and is also connected to the balance weight 71 via the other end or the pin 82.

The pins 76, 78, 79, 81, 82 are parallel to the axis of the rotation spindle 4 and pivotally support the rocking rod 80 on the revolution spindle 2.
Is arranged on the revolution spindle 2 on one diameter line of the revolution spindle 2 orthogonal to the projecting direction of the support arm 73. The swing rod 80 is formed in a substantially V shape, and its bent portion is pivotally supported by the revolution spindle 2 via a pin 78.

The balance weight 71 and the revolution spindle 2 are provided with openings 84 and 85 for allowing the operation of the link mechanism 72. Further, the balance weight 71 allows the support arm 73 to rotate about the balance weight 71. An opening 86 is provided for this purpose.

In such an automatic balancer 70, as shown in FIG. 6, when the housing 3 and the rotation spindle 4 rotate about the swing shaft 31 and become eccentric from the revolution spindle 2, the link weight 71 causes the balance weight 71 to move in the eccentric direction. Is pushed in the opposite direction, and the balance weight 71 rotates about the shaft 74 at the tip of the support arm 73. Therefore, the revolution spindle 2
When the housing 3 and the rotation spindle 4 are eccentric with respect to the balance weight in the direction opposite to the eccentric direction.
71 will be eccentric automatically. As a result, the weight is distributed symmetrically with respect to the axis of the revolution spindle 2.

Next, the operation of this embodiment will be described. When the hole corresponding to the cutter 5 is machined, only the rotation drive motor 11 is operated with the axis of the revolution spindle 2 aligned with the axis of the revolution spindle 2. Then, the rotation spindle 4 supported by the housing 3 rotates while keeping the axis line constant, and the cutter 5 drills holes.

Then, when processing a hole having a diameter larger than that of the cutter 5, the stepping motor 17 is operated for a predetermined time. Then, by the action of the differential gear mechanism 16 and the second and third transmission mechanisms 14 and 15, the revolution spindle 2 and the second pulley 8 are angularly displaced while being relatively angularly displaced,
Due to the functions of the link 9 and the swing arm 6, the housing 3
And the rotation spindle 4 rotates about the swing shaft 31 and deviates from the axis of the revolution spindle 2 to be eccentric.

In this state, with the stepping motor 17 stopped,
The rotation drive motor 11 and the revolution drive motor 13 are operated. Then, via the universal joint 10, the rotation spindle 4
Rotates about its axis, and the revolution spindle 2 is driven to rotate about the axis by the revolution drive motor 13 via the first transmission mechanism 12. Moreover, the third pulley 8 also rotates at the same speed as the revolution spindle 2.

As a result, as shown in FIG. 7, the cutter 5 revolves around the axis thereof while revolving along the revolution orbit 87 determined by the eccentricity ε of the revolution spindle 4 from the revolution spindle 2. Therefore, the hole 88 having a diameter larger than that of the cutter 5 can be processed.

When changing the machining diameter of the hole 88, the eccentricity amount ε, that is, the relative angular displacement amount γ between the revolution spindle 2 and the second pulley 8 may be changed, and the relative angular displacement amount γ and the operation time of the stepping motor 17 may be changed. If they are associated in advance, it is possible to cope with the change in the machining diameter very easily, and it becomes unnecessary to replace the cutter 5.

Even if the rotation spindle 4 is eccentric with respect to the revolution spindle 2, the weight is symmetrically distributed with respect to the axis of the revolution spindle 2 by the function of the automatic balancing device 70, and the bearings 19 and 20 have uneven wear and rattling. Prevents the generation of sound,
The processing accuracy can be improved.

C. Effects of the Invention As described above, the first device of the present invention includes: a fixed frame; an orbital spindle that is basically cylindrical and rotatably supported by the frame; eccentric in the orbital spindle. A cylindrical housing that is arranged so as to be possible; a rotation spindle rotatably supported by the housing about the same axis; a blade attached to the tip of the rotation spindle; and an axis parallel to the axis of the rotation spindle. A swing arm rotatably supported at one end on the revolution spindle and having an intermediate portion connected to the housing; a first drive wheel fixedly mounted on the revolution spindle; A second drive wheel; a link connecting the second drive wheel and the swing arm; a rotation drive motor connected to the rotation spindle via a universal joint; A revolution drive motor connected to the drive wheels; a second drive wheel that relatively displaces the second drive wheel relative to the first drive wheel, and allows rotation of the second drive wheel at the same rotational speed as the first drive wheel. And a drive source for adjustment connected to two drive wheels; the structure is relatively simple, and the rotating spindle is freely eccentric with respect to the revolving spindle to rotate the cutting tool about its axis and to be eccentric. It is possible to revolve on a revolving orbit determined by the amount, and it becomes possible to easily change the hole drilling diameter with a single cutting tool, thus improving work efficiency.

In addition, in the device of the second aspect of the present invention, in addition to the main components of the first aspect of the invention, the revolution drive motor is provided with the first transmission mechanism through the first transmission mechanism.
The second transmission mechanism, in which the drive wheels are coupled, is coupled in the middle of the first transmission mechanism, and the third transmission mechanism, which is coupled to the second drive wheel, cause relative angular displacement in the first and second drive wheels. Since it is connected to the output side of the differential gear mechanism and the stepping motor is connected to the input side of the differential gear mechanism in order to achieve the effect of the first invention, the eccentric amount of the rotation spindle with respect to the revolution spindle is achieved. The mechanism for changing
The amount of eccentricity can be easily changed to cope with the change in the machining diameter.

[Brief description of drawings]

The drawings show one embodiment of the present invention. Fig. 1 is a developed vertical sectional view, Fig. 2 is a sectional view taken along line II-II in Fig. 1, and Fig. 3 is line III-III in Fig. 1. Sectional view, FIG. 4 is a partial view of FIG. 2 showing a state in which the rotation spindle is eccentric, and FIG.
FIG. 6 is a sectional view taken along line VV in FIG. 6, FIG. 6 is a sectional view corresponding to FIG. 5 showing a state in which the rotation spindle is eccentric, and FIG. 7 is an explanatory view showing a locus of the cutter. 1 ... Frame, 2 ... Revolution spindle, 3 ... Housing, 4 ... Rotating spindle, 5 ... Cutter as cutting tool, 6 ... Swing arm, 7 ... First as first driving wheel
Pulley, 8 ... Second pulley as second drive wheel, 9 ...
Link, 10 ... Universal joint, 11 ... Spin drive motor, 12 ...
… 1st transmission mechanism, 13 …… Revolution drive motor, 14 …… 2nd transmission mechanism, 15 …… 3rd transmission mechanism, 16 …… Differential gear mechanism, 17
... Stepping motors as drive sources for adjustment

Claims (2)

[Claims] 1. A fixed frame; a revolution spindle that is basically cylindrical and rotatably supported by the frame; a cylindrical housing that is eccentrically disposed in the revolution spindle; A rotation spindle rotatably supported by the housing about the same axis; a blade attached to the tip of the rotation spindle; one end rotatably supported on the revolution spindle about an axis parallel to the rotation spindle. A swing arm having an intermediate portion connected to the housing; a first drive wheel fixed to the revolution spindle; a second drive wheel mounted on the revolution spindle so as to be rotatable relative to each other; a second drive wheel; A link connecting the swing arms; a rotation drive motor connected to the rotation spindle via a universal joint; a revolution drive motor connected to the first drive wheel. For adjusting the second drive wheel relative to the first drive wheel by angular displacement and allowing the second drive wheel to rotate at the same rotational speed as the first drive wheel and being coupled to the second drive wheel. A rotary processing device, comprising: a drive source. 2. A solid frame; a revolving spindle which is basically cylindrical and rotatably supported by the frame; a cylindrical housing which is eccentrically disposed in the revolving spindle; A rotation spindle rotatably supported by the housing about the same axis; a blade attached to the tip of the rotation spindle; one end rotatably supported on the revolution spindle about an axis parallel to the rotation spindle. A swing arm having an intermediate portion connected to the housing; a first drive wheel fixed to the revolution spindle; a second drive wheel mounted on the revolution spindle so as to be rotatable relative to each other; a second drive wheel; A link connecting the swing arms; a rotation drive motor connected to the rotation spindle via a universal joint; a first drive wheel connected to the rotation drive motor via a first transmission mechanism. An orbital drive motor; a second transmission mechanism connected in the middle of the first transmission mechanism; a third transmission mechanism connected to the second drive wheel; and a relative angular displacement of the first and second drive wheels. Accordingly, a rotary machining apparatus comprising: a differential gear mechanism in which the second and third transmission mechanisms are connected to the output side; and a stepping motor connected to the input side of the differential gear mechanism.