JPH069369U - Processing dust scattering prevention tool - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the processing dust such as chips from scattering in clean rooms. A driving device 1 for contacting and detachably contacting a work W held by a holder 3 to rotate the work W around an axis A, has a cylindrical shape surrounding the work W. Cover member 20
Attach. A window (32) for inserting a cutting tool is formed on the peripheral wall of the cover member (20), and a vacuum hose (33) for sucking dust is connected to the cover member (20) so as to communicate therewith.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a processed dust scattering prevention tool.

[0002]

[Prior art]

 When cutting an object to be cut in a clean atmosphere such as in a clean room, for example, in the motor manufacturing process, in order to improve runout accuracy during rotation of the hub, when final finishing cutting of the hub is performed after the motor is assembled, the conventional , The motor was clamped to a chuck, etc., the hub of the motor was rotated for cutting, the suction port of the vacuum hose was brought close to the cutting site, and the generated processing dust was sucked.

[0003]

[Problems to be solved by the device]

 However, the vacuum hose alone cannot capture and suck all the processed dust, and the processed dust scatters in the clean room, contaminating the clean atmosphere.

Therefore, an object of the present invention is to provide a processed dust scattering prevention tool that solves the above-mentioned conventional problems.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a drive device for contacting and detachably contacting an object to be cut held by a holder to rotate the object to be cut around an axis, the object to be cut. A cylindrical cover member surrounding the above is provided, a window portion for inserting a cutting tool is formed in the peripheral wall of the cover member, and a vacuum hose for sucking dust is connected to the cover member.

[0006]

[Action]

 In a clean room, etc., the object to be cut held by the holder is surrounded by the cover member, the object to be cut is rotated around the axis by the drive unit, and the cutting tool is inserted from the window of the cover member to cut the object to be cut. Can cut things. The processed dust generated at this time can be sucked by the vacuum hose while being blocked by the cover member, and can be reliably prevented from scattering into a clean room or the like.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 1 shows a processed dust scattering preventive tool according to the present invention. This preventive tool is attached to a drive unit 1, and cuts a motor hub 2 which is a work W in a clean room or the like. Used when finishing.

Reference numeral 3 denotes a holder such as a chuck for holding the workpiece W. The holder 3 has a plurality of gripping pieces 4 ... Which can be opened and closed in the radial direction at one end (upper side of the drawing). The other end (lower side in the figure) is fixed so that the holder 3 does not rotate.

Here, the workpiece W is composed of a shallow plate-shaped bracket 5 which is a stationary member, and a bowl-shaped hub 2 which is rotatably supported with respect to the bracket 5. In the illustrated example, the bottom outer peripheral surface of the bracket 5 of the motor is gripped by the gripping pieces 4 ..., By which the hub 2 is held by the holder 3 so as to be rotatable about the axis A.

A ring-shaped cover 6 is formed on the upper end surface of the gripping pieces 4 ... In the drawing by a bolt or the like. For example, a through hole and a spot facing are formed in the cover 6, and the through hole and the seat are formed. The bolt is inserted into the grill and mounted, and the stepped inner peripheral edge 7 of the cover 6 and the outer peripheral edge 8 of the flange portion of the hub 2 face each other with a minute gap.

In this manner, the stepped inner peripheral edge 7 of the cover 6 covers the outer peripheral edge 8 of the flange portion of the hub 2, and during cutting, machining dust such as cutting chips is generated between the hub 2 and the bracket 5. Prevents intrusion into the motor from the gap.

The drive device 1 includes a motor (not shown) that rotates the rotary shaft 9 around the axis A, and is configured to be movable back and forth in the direction of the axis A.

A rotation addition member 10 is attached to the tip of the rotation shaft 9 (lower end in the drawing), and the rotation addition member 10 comes into contact with and separates from the workpiece W as the drive device 1 advances and retracts. , Workpiece W is rotated about axis A.

The rotation adding member 10 includes a holding cylinder portion 11 fixed to a tip end of the rotating shaft 9, a bearing 12 provided inside the holding cylinder portion 11, a bearing 12 which is rotatable about an axis A and is rotatable. A centering center pin 13 that is slidably fitted in the direction of the center A, an elastic member 14 such as a compression coil spring that elastically urges the center pin 13 toward its tip, and a centering pin 11 fixed to the end surface of the pressing cylinder 11. Consisting of a rubber flat ring 15

The tip of the center pin 13 is formed in a sharp shape at a predetermined taper angle, and is fitted into the center hole 17 (see FIG. 2) of the shaft 16 of the motor held by the holder 3. Further, a stopper 18 is fixed to the base end of the center pin 13, and the elastic member 14 is interposed between the holding piece 19 fixed to the center pin 13 and the bearing 12.

Further, the drive device 1 is provided with a cylindrical cover member 20 surrounding the workpiece W.

The cover member 20 is composed of inner and outer tubular bodies 21 and 22 made of plastic or the like and having high permeability, and a plurality of connecting tools 23 that connect the inner and outer tubular bodies 21 and 22, and the inner tubular body 21 is It is attached to the spindle end portion 42 of the drive unit 1 via a fixing ring 24 made of aluminum alloy or the like.

An annular support member 25 made of an aluminum alloy or the like is fixed to the outer peripheral surface of the inner cylindrical body 21, and the support member 25 is provided with a plurality of guide bushes 26 at a predetermined circumferential pitch. Be done.

The connecting tool 23 includes a shaft member 29 having male screws 27 and 28 formed at both ends, a nut member 30 screwed to the one male screw 27, a compression coil spring fitted on the shaft member 29, and the like. And the elastic member 31 of.

One end of each shaft member 29 is slidably inserted into the hole of each guide bush 26, and a nut member 30 is screwed onto the male screw 27 of each shaft member 29. Further, the male screw 28 of each shaft member 29 is screwed into each screw hole 43 formed in one end surface of the outer cylindrical body 22 so as to correspond to the guide bush 26.

The elastic member 31 is interposed between the support member 25 and the outer cylindrical body 22, and the outer cylindrical body 22 slidably fitted on the inner cylindrical body 21 in the direction of the axis A is constantly held. Repulsive force in 3 directions (arrow B direction).

The nut member 30 of the connecting tool 23 is screwed back and forth to adjust the length of the cover member 20 to cover the workpiece W corresponding to the workpiece W of various sizes and shapes. It can be surrounded by the member 20 and rotated.

Thus, a window portion 32 into which the cutting tool F (see FIG. 2) such as a cutting tool is inserted is formed at a predetermined portion of the peripheral wall of the outer cylindrical body 22.

Further, one end of a vacuum hose 33 for sucking dust is connected to a predetermined portion of the peripheral wall of the outer cylindrical body 22 at a position different from the window 32, so that the vacuum hose 33 has a vacuum hose 33. A dust collector (not shown) connected to the other end communicates with the cover member 20.

Further, a ring-shaped angle member 34 is fixed to the inner peripheral edge of the outer tubular body 22 on the opening side. This angle member 34 has an inclined surface 35, and its inclination angle θ is set to 45 ° to 60 °.

Reference numeral 36 denotes a thin-walled seal ring made of rubber or the like fixed to the end surface of the outer tube body 22 on the opening side, and seals the end surface of the cover 6 with the end surface of the cover member 20 (outer tube body 22) on the opening side. The elasticity of the ring 36 is used to bring them into close contact with each other to improve the degree of sealing.

Next, a method of using the processed dust scattering prevention tool configured as described above will be described.

As shown in FIG. 1, when the motor, which is the workpiece W, is clamped by the holder 3 and the cover member 20 is moved forward in the direction of arrow B, the outer cylindrical body 22 is sealed by the seal ring as shown in FIG. The end face of the center pin 13 is fitted into the center hole 17 of the shaft 16 by abutting on the end face of the cover 6 via the groove 36.

As a result, the opening of the cover member 20 (outer cylinder 22) is closed to surround the work W, and the rotation axes of the rotation shaft 9 and the shaft 16 are aligned with each other.

Further, the cover member 20 is moved forward through the flat ring 15 until the pressing member 11 comes into contact with the end surface of the hub 2. At this time, until the flat ring 15 contacts the hub 2, the outer cylindrical body 22 and the center pin 13 are retracted in the direction of arrow C against the elastic force of the elastic members 31, 14 by the cover 6 and the shaft 16. To do.

As a result, the rotational torque of the rotating shaft 9 can be transmitted to the hub 2 via the additional rotation member 10.

Next, the rotary shaft 9 is rotated in a predetermined direction, the hub 2 is rotated around the axis A via the rotation adding member 10, and further, a dust collector (not shown) connected to the vacuum hose 33. Drive.

Then, the cutting tool F is inserted through the window portion 32, and the outer surface of the hub 2 is cut into a predetermined shape and size. Then, the processed dust generated by cutting is sucked from the inside of the cover member 20 into the vacuum hose 33, and is collected by the dust collector.

Since the airflow at this time is in the direction from the outside of the window portion 32 to the inside, the processed dust is not scattered from the window portion 32 to the outside.

Further, since the angle member 34 is provided at the corner formed by the contact between the opening side end surface of the cover member 20 (outer cylinder body 22) and the cover 6 end surface, the angle member 34 is provided at the corner portion. The stagnation does not occur in the air flow inside the cover member 20, and the angle formed by the peripheral wall of the outer tubular portion 22 and the inclined surface 35 and the angle formed by the end surface of the cover 6 and the inclined surface 35 are obtuse angles, and the dust No accumulation occurs.

The processed dust scattering prevention tool of the present invention can be used for both shaft fixed type and shaft rotating type motors.

That is, in the shaft fixed type motor, the bracket 5 and the shaft 16 are integrally fixed and fixed. Therefore, when the rotary shaft 9 of the drive device 1 rotates, the pressing member 11 of the rotation adding member 10 rotates relative to the center pin 13 in a stationary state via the bearing 12.

On the other hand, in the shaft rotation type motor, the pressing member 11 also rotates as the rotation shaft 9 rotates. At that time, the center pin 13 is in a free state via the bearing 12, and rotates together with the holding member 11.

Next, referring to FIG. 3, the shaft 37 of the motor is fixed by the holder 3, and the hub 38 of the motor, which is the workpiece W, is held by the holder 3 so as to be rotatable around the axis A. , Shows the case of cutting.

In this case, an annular non-magnetic cover plate 40 having a thin magnetic ring 39 embedded therein is attracted to the back surface 44 of the hub 38 by the magnetic force of a sensor magnet 41 provided on the hub 38. .

Since the magnetic ring 39 is provided substantially in the same size as the outer diameter of the center magnet 41, the magnetic ring 39 and the sensor magnet 41 are attracted and held concentrically. Therefore, the non-magnetic cover plate 40 is constantly sucked and held at a predetermined position of the motor.

As a result, the back surface 44 is covered to prevent machining dust such as chips from adhering to the sensor magnet 41 during the cutting of the hub 38 by the cutting tool F.

[0044]

[Effect of device]

 Since the present invention is constructed as described above, it has a great effect as described below.

In a clean room or the like, the processing dust generated when cutting the workpiece W is blocked by the cover member 20 and is sucked by the vacuum hose 33 to the outside of the cover member 20 (clean room or the like). It is possible to reliably prevent scattering. Therefore, it does not contaminate a clean atmosphere such as a clean room.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a usage state.

FIG. 3 is a cross-sectional view of an essential part showing a cutting state of an object to be cut.

[Explanation of symbols]

 1 Drive device 3 Holder 20 Cover member 32 Window 33 Vacuum hose W Workpiece A A axis F Cutting tool

Claims (1)

[Scope of utility model registration request] 1. An object to be cut W is surrounded by a drive device 1 which comes into contact with and separates from an object W held by a holder 3 to rotate the object W around an axis A. A cylindrical cover member 20 is attached, and the cutting tool F is attached to the peripheral wall of the cover member 20.
A processed dust scattering prevention tool, characterized in that a window portion (32) for inserting is formed and a vacuum hose (33) for sucking dust is communicated and connected to the cover member (20).