JPS6051645B2 - Mass centering machine with gimbal mechanism with built-in servo mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mass centering machine for machining a center hole on the main axis of inertia of a rotating body.

Conventional mass centering machine means for rotating bodies include:
There is something like the one shown in Figures 1 and 2, in which a rotating body a is mounted inside a rotating frame via a crank pin (not shown), and these three parts rotate together, and the rotating body a etc. By rotating the rotating body, the amount of unbalance of the rotating body is measured, and according to this amount of unbalance, the rotating body a is actuated by operating a servo mechanism e consisting of a servo motor c attached to the roller and a spring d attached to the roller. After making the unbalance amount zero by making both ends eccentric, a center hole is drilled with a center drill f. However, with such conventional mass centering means, if the type of rotating body a changes, a rotating frame suitable for that type is required. However, there is a problem in that many types of rotary frames b are required, resulting in a significant increase in cost. Furthermore, in such conventional mass centering means, the servo mechanism e is
As shown in Fig. 2, the rotating body a is composed of a servo motor c connected to the roller via a speed reduction mechanism g, and a spring d that presses the end of the rotating body through the roller.
X at the end. There is a problem that eccentric movement in the Y direction cannot be performed quickly and response followability is poor.

The present invention aims to solve these problems.
Instead of using an expensive and large-scale rotating frame, a gimbal mechanism is attached to the rotating body to reduce costs, and a fluid pressure servo mechanism with good response tracking improves frequency response. An object of the present invention is to provide a mass centering machine having a gimbal mechanism with a built-in servo mechanism. Therefore, the mass centering machine having a gimbal mechanism with a built-in servo mechanism of the present invention grips both ends of a rotating body with a pair of rotating members and rotates the rotating members to rotate the rotating body. The amount of unbalance of the body is detected, and the rotating body is moved by X, . In a mass centering machine for drilling a center hole on the main axis of inertia of the rotating body by moving it in the Y direction to make the unbalance amount zero, between both ends of the rotating body and the rotating member, A gimbal mechanism is interposed, and each gimbal mechanism includes a first member having an engagement portion with an end of the rotary body, and is connected to the first member to adjust the first member to the unbalance. a second member with a built-in hydraulic servo mechanism capable of moving in the X or Y direction depending on the amount of unbalance; and a second member connected to the second member to move the second member in the Y or X direction depending on the amount of unbalance. The third rotary member is connected to the rotating member and has a built-in hydraulic servo mechanism that can move the rotary member to the rotary member.
It is characterized by being composed of the following members.

Hereinafter, a mass centering machine having a gimbal mechanism with a built-in servo mechanism as an embodiment of the present invention will be explained with reference to the drawings. FIG. 3 shows the gimbal mechanism part in a cross section taken along the line Overall explanatory diagram, No. 4
The figure is a front view showing the three gimbal mechanisms, and FIG. 5 is an enlarged sectional view for explaining the structure of the gimbal mechanism.

As shown in FIG. 3, transition bases 2, 2 are slidably disposed on the main body frame 1, and each transition base 2
Bearings 4 are provided through springs 3, and each bearing 4 rotatably supports a rotating member 5. Each rotating member 5 has a cylindrical shape so that a drill blade 6 can pass through it,
Furthermore, flange portions 5a are provided on mutually opposing sides of the rotating member 5.
is formed.

Further, a gimbal mechanism F with a built-in servo mechanism as shown in FIG. 4 is attached to the flange portion 5a of the rotating member 5.
, 9. To explain this gimbal mechanism F with built-in servo mechanism in more detail, as shown in Fig. 5,
The first member 7 is a crankshaft material 1 as a rotating body.
The first member 7 has an engaging portion 7a that engages with the end of the second member 8, and this first member 7 is configured to rotate around the X axis in a hydraulic actuator 11 as a fluid pressure servo mechanism built in the second member 8. The piston rod 11a is connected to a piston rod 11a that can reciprocate in the X direction while allowing the As a result, the oil chamber 11 of the actuator 11 is
When pressure oil is supplied to b and 11c, the first member 7 can be moved in the X direction while being allowed to rotate around the X axis.

Note that the engaging portion 7a of the first member 7 actually has a chuck structure as shown in FIG. Further, since the first member 7 is provided with an auxiliary rod 7b that is slidably inserted into the second member 8, the X of the first member 7 due to the operation of the hydraulic actuator 11 is This allows for smooth directional movement.

In this way, the second member 8 incorporates the fluid pressure type servo mechanism 11 that is connected to the first member 7 and can move the first member 7 in the X direction. Reference numeral 8 denotes a piston rod 12a that can reciprocate in the Y direction while allowing rotation around the Y axis in a hydraulic actuator 12 as a fluid pressure servo mechanism built in the third member 9.
is connected to.

As a result, when pressure oil is supplied to the oil chambers 12b and 12c of the actuator 12 via a servo valve (not shown), the second member 8 can be moved in the Y direction while being allowed to rotate around the Y axis. There is.

Further, since the second member 8 is also provided with an auxiliary rod 8a that is slidably inserted into the third member 9, the Y of the second member 8 due to the operation of the hydraulic actuator 12 is This allows for smooth directional movement.

The third member 9 is connected to the flange portion 5a of the rotating member 5.

As described above, the third member 9 has a built-in fluid pressure servo mechanism 12 that is connected to the second member 8 and can move the second member 8 in the Y direction. are also connected.

Therefore, these integrated gimbal mechanisms F have X, . Y
Since it can rotate around the axis, even if the main axis of inertia of the crankshaft material 10 is inclined with respect to the rotation axis, it is possible to reliably grip both ends of the crankshaft material 1, respectively. , both ends of the crankshaft material 10 are X-shaped so that the amount of unbalance of the crankshaft material 10 is zero. Y
It is possible to move the required amount in the direction.

In FIG. 5, reference numeral 13 indicates an X-direction differential transformer for detecting the amount of movement of the rods 11a and 7b, and 14 indicates a rod 12.
A Y-direction differential transformer is shown that detects the amount of movement of the crankshaft materials 10 and 8a. , an unbalance compensating means for generating a signal to compensate for errors caused by external masses, so-called parasitic masses, is connected.

Then, the signal from this unbalance compensation means is transmitted to the bearing 4.
The above-mentioned error is compensated for by subtracting the signal from the vibration detection pickup attached to the vibration detection pickup.

The mass centering machine having a gimbal mechanism with a built-in servo mechanism according to the present invention is configured as described above, so in order to machine a center hole on the main axis of inertia of the crankshaft blank 10, first, the crankshaft blank 10 is gimbaled. The rotary member 4 is attached to and gripped by the rotating member 4 via the mechanism F, and then the rotating member 4 is rotated together with the crankshaft material 10 by operating a drive motor (not shown).

By rotating the crankshaft material 10 in this way, the amount of unbalance of the crankshaft material 10 is detected and measured, and the hydraulic actuators 11 and 12 are operated so that the amount of unbalance becomes zero.

At this time, the servo mechanism is activated by the hydraulic actuators 11, 1.
2, the required large power can be obtained even with the small actuators 11 and 12 disposed in such a limited small space. X. , the eccentric movement in the Y direction can be performed quickly, and as a result, the frequency response, that is, the response followability of the servo mechanism is greatly improved.

After aligning the main axis of inertia of the crankshaft material 10 with the rotation axis in this way, use the drill bit 6 of the center drill to
Center hole is machined.

In addition, in order to perform center hole machining on materials 10 with different axial lengths, the transition base 2 is slid along the main body frame 1,
The above-described operation may be performed after appropriately adjusting the interval between the gimbal mechanisms F.

In the above embodiment, the hydraulic actuator 11 with the second member 8 is used for movement in the X direction, and the hydraulic actuator 12 with the third member 9 is used for movement in the Y direction. It is also possible to use the actuator 11 for movement in the Y direction and the actuator 12 for movement in the X direction.

As described in detail above, according to the mass centering machine having a gimbal mechanism with a built-in servo mechanism of the present invention, both ends of a rotating body are gripped by a pair of rotating members, and the rotating members are rotated to rotate the rotating body. By doing so, the amount of unbalance of the rotating body is detected, and the rotating body is adjusted to X according to the amount of unbalance. ．． In a mass centering machine for drilling a center hole on the main axis of inertia of the rotating body by moving in the Y direction to make the unbalance amount zero, between both ends of the rotating body and the rotating member, A gimbal mechanism is interposed, and each gimbal mechanism includes a first member having an engaging portion for engaging with the end of the rotary body, and a first member connected to the first member to connect the first member to the non-rotating body. A second member has a built-in fluid pressure servo mechanism that can move in the X or Y direction depending on the amount of balance, and a second member that is connected to the second member and moves the second member in the Y or 7 directions depending on the amount of unbalance. has a built-in hydraulic servo mechanism capable of moving in the X direction, and is composed of a third member connected to the rotating member, so it has a compact and simple structure compared to the conventional means shown in FIG. This has the advantage of achieving a servo mechanism with quick follow-up performance.

[Brief explanation of drawings]

Figures 1 and 2 show a conventional mass centering machine. Figure 1 is a schematic diagram of the entire machine, and Figure 2 is the one in Figure 1.
It is an enlarged front view seen from the arrow line, and FIGS. 3 to 5 show a mass centering machine having a gimbal mechanism with a built-in servo mechanism according to the present invention, and FIG. 3 shows the gimbal mechanism part in FIG. 4 is a front view showing the gimbal mechanism, and FIG. 5 is an enlarged sectional view illustrating the structure of the gimbal mechanism. 1...Body frame, 2...Transition base, 3...Spring, 4...Bearing, 5...
...Rotating member, 5a... Flange portion of rotating member 5, 6... Drill blade, 7... First member constituting gimbal mechanism F, 7a... ...engaging part,
7b...Rod, 8...Gimbal mechanism F
Second member 8a...rod, 9.
...Third member constituting the gimbal mechanism F, 10.
... Crankshaft material as a rotating body, 11, 12.
...Hydraulic actuator as a fluid pressure servo mechanism, 11a, 12a...Zeston rod, 11
b, 11c, 12b, 12c... oil chamber, 13,
14... Differential transformer, F... Gimbal mechanism.

Claims (1)

[Claims] 1. By gripping both ends of the rotating body with a pair of rotating members and rotating the rotating members to rotate the rotating body, the amount of unbalance of the rotating body is detected, and the amount of unbalance of the rotating body is adjusted to the amount of unbalance. In a mass centering machine for drilling a center hole on the main axis of inertia of the rotating body by moving in the X and Y directions according to A gimbal mechanism is interposed between them, and each gimbal mechanism includes a first member having an engaging portion with the end of the rotating body, and a first member connected to the first member. a second member having a built-in hydraulic servo mechanism capable of moving the servo mechanism in the X or Y direction according to the amount of unbalance; and a second member connected to the second member to move the second member in the Alternatively, a mass centering machine having a gimbal mechanism with a built-in servo mechanism, comprising a built-in hydraulic servo mechanism capable of moving in the X direction and a third member connected to the rotating member.