JPH06114604A - Set processing machine of rotor driving device - Google Patents

Abstract

PURPOSE:To provide a set processing machine of a rotor driving device, wherein the machine can make a processing so that the frame is positioned parallel with the hub table of the rotor driving device. CONSTITUTION:A set processing machine is provided for a rotor driving device 1 having a hub table 2 on which a rotor is mounted. This includes a main spindle 3 for holding the hub table 2 rigidly and a sub-spindle 4 which is located on the outside of the main spindle 3 and rotates concentrically with the main spindle 3 and which is to hold the frame 5 of the rotor driving device 1. Therewith the mounting surface of the frame 5 is machined while it is rotated by the sub-spindle 4 with they main spindle 3 holding the hub table 2 used as the reference for processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling machine for cutting a device for driving a rotating body such as a magnetic disk after assembling.

[0002]

2. Description of the Related Art For example, in a motor for a hard disk drive (hereinafter referred to as HDD) or the like, required accuracy includes surface runout accuracy and center runout accuracy. These accuracies cannot be ensured simply by assembling the parts. Therefore, after assembling the motor, attach the motor body to the assembly machine and cut while rotating the hub base etc.
It was processed to minimize surface runout and runout. Such an assembling machine is commercially available and is generally widely used.

[0003]

In recent years, the capacity of hard disks has increased, and HDD motors have been required to have parallelism of the frame with respect to the hub base in addition to the above-described two runout accuracies. However, in the conventional assembly machine, when the rotary shaft is inclined with respect to the motor body, the cutting surface becomes a conical surface, and the parallelism of the stator with respect to the hub base cannot be obtained.

The present invention has been made to solve the above problems, and is capable of performing processing such that a frame is parallel to a hub base of a rotary body driving device. It is an object of the present invention to provide a group processing machine.

[0005]

To achieve the above object, the present invention provides a main spindle for integrally holding a hub base, and a main spindle arranged on the outer peripheral side of the main spindle and concentric with the main spindle. It has a sub-spindle that rotates in a circular shape and holds the frame of the rotating body drive device, and uses the main spindle that holds the hub stand as a proof, rotate the frame with the sub-spindle, and cut the mounting surface of the frame I decided to do it.

[0006]

The hub base holding portion of the main spindle is machined before machining the individual rotary body driving devices to prove this. Next, lock the main spindle, chuck the hub base of the rotating body driving device with the main spindle, rotate the frame of the rotating body driving device with the sub spindle, and cut the attachment part of the frame to the substrate. To do.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an assembling machine for a rotary body drive according to the present invention will be described below with reference to the drawings. Figure 1
In the above, the assembling machine of the rotary body driving device has a double structure, and is composed of a main spindle 3 portion on the inner side and a sub spindle 4 portion on the outer side. The main spindle 3 has a structure similar to that of a general-purpose machine tool, is rotatably supported by a machine body 16 via a ball bearing 18, and an air chuck 11 is attached to the tip portion thereof. The air chuck 11 has a claw portion 10,
The claw portion 10 has a structure in which the object to be processed is sandwiched. The part of the main spindle 3 has the same structure as a general-purpose assembling machine, so that the structure can be used as it is.

On the other hand, a sub-spindle 4 is rotatably attached to the outside of the main spindle 3 via a ball bearing 14. Sub spindle 4 is pulley 20
The belt 6 is hung on the pulley 20. The belt 6 is also wound around a pulley 22 of a motor 7, which is a power source different from the power source of the main spindle 3. When the motor 7 is driven to rotate, the power is transmitted to the sub spindle 4 by the belt 6 and the sub spindle 4
Are driven to rotate independently of the main spindle 3. An attachment jig 13 is attached to the tip of the sub spindle 4 so as to cover the air chuck 11 and the claw portion 10 attached to the tip of the main spindle 3. A rotating body drive device 1 in which processing is applied to the tip of the attachment jig 13
A hooking portion 12 for hooking in the hole of the frame 5 is formed. The sub-spindle 4 is of a unit type and can be attached to the main spindle 3 or removed from the main spindle 3 as required.

Next, an example of assembling using the rotating body driving apparatus according to the above embodiment will be described. In FIG. 1, first,
Before processing the rotary drive device 1 as an individual work,
The end surface of the claw portion 10 of the air chuck 11 is precisely machined while the main spindle 3 is rotationally driven by a motor, and this surface is used as a proof. Next, after the main spindle 3 is locked so as not to rotate, the rotary body driving device 1 is arranged on the claw portion 10 of the air chuck 11 formed in front of the main spindle 3, and the hook formed on the mounting jig 13 is hooked. Part 12
Is inserted into a hole formed on the surface of the frame 5 opposite to the mounting surface B, and the claw portion 10 is brought into contact with the peripheral surface of the hub base 2 of the rotary body drive device 1 and the brim-shaped surface A. To fix. The portion of the claw portion 10 that comes into contact with the brim-shaped surface A is formed so as to have a high degree of flatness by performing the cutting process or the like as described above. Further, the brim-shaped surface A also serves as a proof when the frame is cut in a later step, and thus is cut in advance to have high flatness.

When the motor 7 is driven to rotate, the sub spindle 3 rotates. The hook 12 of the attachment jig 13 attached to the tip of the sub-spindle 3 and the rotating body drive device 1
Since the frame 5 of the sub-spindle 1 is connected,
With the rotation of 3, the frame 5 is rotationally driven. The cutting tool 8 is brought into contact with the frame mounting surface B of the rotating body driving device 1 that is being rotationally driven, and cutting is performed so that the frame mounting surface B is parallel to the hub base 2. Byte 8 in this case
May be moved manually, or may be moved using a programmable controller or a numerical controller.

The hub base 2 is fixed to the tip of the main spindle 3, and the frame 5 is processed while the frame 5 is rotated by the sub-spindle 4 while the frame mounting surface B is cut. Therefore, it is possible to perform a process for obtaining parallelism of the frame 5 with respect to the hub base 2 of the rotary body driving device 1, which is impossible with the conventional rotary machining device assembling machine.

Further, since the assembly machine of the rotary body driving apparatus as described above is constructed so that the sub-spindle 4 is attached to the general assembly machine, the existing assembly machine is wasted. You can use it without doing it, and if you remove it, you can use it as an existing assembly machine as before. Since it can be installed and removed, it is possible to quickly respond to model changes.

A machine tool for a rotary body driving device according to the present invention is used as a general machine tool for a rotary body driving device such as a magnetic disk, an optical disk or the like, as well as a drum motor or an encoder for a VTR or the like. can do.

[0014]

According to the present invention, a main spindle for integrally holding a hub base, a main spindle which is disposed on the outer peripheral side of the main spindle and rotates concentrically with the main spindle, and a rotary body drive device It has a sub-spindle for holding the frame, and using the main spindle held on the hub base as a proof, the frame is rotated by the sub-spindle and the frame mounting surface is cut, so the frame of the rotating body drive device is It has become possible to form it so that it is parallel to the hub base.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an assembling machine for a rotary body driving device according to the present invention.

[Explanation of symbols]

 1 Rotating body drive device 2 Hub stand 3 Main spindle 4 Sub spindle 5 Frame

Claims (1)

[Claims] 1. A main assembly spindle of a rotary body driving device having a hub base on which a rotary body is mounted, a main spindle for integrally holding the hub base, and the main spindle arranged on an outer peripheral side of the main spindle. It has a spindle and a sub-spindle that rotates concentrically and that holds the frame of the rotating body driving device, and uses the main spindle that holds the hub base as a certificate to rotate the frame with the sub-spindle. A machine for assembling a rotary body driving device, characterized by cutting the mounting surface of the frame.