JP2004098195A - Polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing device which reduces the influence of any external force given by a work upon the transport of a polishing tape, precluding expansion and shrinkage of the tape and unevenness in the polishing workmanship due to a speed change, and performs the polishing with a higher accuracy. <P>SOLUTION: The polishing device is composed of a web transport device equipped with a payoff roller to hold a web of a polishing tape, a feed roller to take out the polishing tape from the payoff roller and a takeup roller to take up the polishing tape, a contact roll to press the tape to a work to be processed, a work transporting device to move the work, and a processing amount adjusting device to keep the processing amount constant and uniform at all times in the neighborhood of the point where the work makes contact with the tape. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a polishing apparatus for polishing a work by pressing a polishing tape against the work, and more particularly to a highly accurate position near a contact point between the polishing tape and the work and adjustment of a polishing pressure.
[0002]
[Prior art]
A polishing apparatus that includes an unwind roller, a feed roller, and a take-up roller, uses a feed roller to feed the polishing tape from the unwind roller to the take-up roller, and polishes the work by pressing the polishing tape against the work during conveyance. I have.
[0003]
In such a polishing apparatus, it is general to control the speed of the winding roller and the torque of the unwinding roller in order to keep the transport tension of the polishing tape constant.
[0004]
[Problems to be solved by the invention]
However, conventionally, there are the following problems. That is, the relative speed between the polishing tape and the work is not constant at the processing point where the polishing is performed, such as when the polishing tape is pulled or slipped due to the frictional force that the polishing tape receives from the work, and polishing unevenness occurs.
[0005]
Further, it is difficult to make the pressing pressure at the contact point between the polishing tape and the work extremely low, and there is also a problem that it is difficult to perform precise polishing.
[0006]
Further, in a generally used ball screw driven work transfer device, since it is difficult to perform high-precision positioning and smooth and straight movement, it is difficult to control a polishing position and to secure a uniform surface. is there.
[0007]
In order to solve such a problem, the present invention reduces the influence of an external force received from a work on the conveyance of a polishing tape, prevents polishing unevenness due to expansion and contraction of the tape and fluctuation in speed, and a polishing apparatus capable of polishing with higher precision. The purpose is to provide.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a first aspect of the present invention is an apparatus for polishing a surface of a work by contacting a polishing tape, comprising: an unwinding roller for holding a web of a polishing tape; A web transport device having a feed roller for unwinding the polishing tape and a take-up roller for winding the polishing tape, a contact roll for pressing the polishing tape against the work, a work transport device for moving the work, the work and the polishing A processing amount adjusting device for constantly and uniformly holding the processing amount near the contact point of the tape is provided.
[0009]
According to a second aspect of the present invention, in the polishing apparatus according to the first aspect, the processing amount adjusting device is provided with a feed roller installed in close proximity to the contact roller and a driving shaft of the unwinding roller. It comprises a torque control device for controlling the force and a speed control device for controlling the speed of the feed roller.
[0010]
According to a third aspect of the present invention, in the polishing apparatus according to the first or second aspect described above, the processing amount adjusting device is configured by a pressure adjusting device that keeps a pressing pressure for pressing the polishing tape against the work constant. It was made.
[0011]
A fourth aspect of the present invention is the polishing apparatus according to the first to third aspects described above, wherein the pressure adjusting device is disposed at both ends of the contact roller, and an air cylinder for adjusting a pressing pressure of the contact roller; And an air supply port for adjusting the balance of the air supplied to each of the push side and the pull side of the air cylinder.
[0012]
According to a fifth aspect of the present invention, in the polishing apparatus according to the first to fourth aspects, the pressure adjusting device is provided at both ends of the contact roller by a wedge-shaped stopper that adjusts a pressing position of the contact roller. It is configured.
[0013]
According to a sixth aspect of the present invention, in the polishing apparatus according to the first to fifth aspects, the contact roller is a hollow contact roller passing through a central axis, and the contact roller is provided between an inner diameter of the contact roller and the central axis. And a bearing-like supporting part.
[0014]
According to a seventh aspect of the present invention, in the polishing apparatus according to the first to sixth aspects described above, the work transfer device is configured by a linear motor and an air slider.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 shows an embodiment of the basic configuration of the polishing apparatus of the present invention.
[0016]
The polishing apparatus includes an unwinding roller 1, a contact roller 2, a feed roller 3, a nip roller 4, a winding roller 5, and a work transfer device 6. Further, a torque control device 7 is provided on the unwinding roller 1, a pressure adjusting device 8 is provided on the contact roller 2, and a speed control device 9 is provided on the feed roller 3.
[0017]
The polishing device sends the polishing tape 10 from the unwinding roller 1 by sandwiching the polishing tape 10 between the feed roller 3 and the nip roller 4, and moves relative to the polishing tape 10 by the contact roller 2 and the work transfer device 6. The polishing tape 10 is pressed against the workpiece 11 to be polished, and the polishing is performed.
[0018]
The polishing apparatus keeps the transport tension of the polishing tape 10 constant by a torque control device 7 for controlling the driving force of the rotating shaft of the unwinding roller 1 and a speed control device 9 for controlling the speed of the feed roller 3.
[0019]
Further, the feed roller 3 and the nip roller 4 are installed near the contact roller 2, and the polishing tape 10 is supported at a position closer to the contact roller 2 than the take-up roller 5. Is reduced, and expansion and contraction and speed fluctuations caused by fluctuations in the tension of the polishing tape 10 are reduced.
[0020]
FIG. 2 is a front view and a side view of the pressure adjusting device 8, and a cross-sectional view of the contact roller 4.
[0021]
The pressure adjusting device 8 includes an air cylinder 12, a pull-side air supply port 13, a push-side air supply port 14, a wedge-shaped stopper 15, and an actuator 16.
[0022]
The air cylinders 12 are installed at both ends of the contact roller 2, supply air pressure to cancel the weight of the contact roller 2 from the pull-side air supply port 13, and press from the push-side air supply port 14 to actually perform polishing. The pressure is supplied, and the pressing pressure can be adjusted with high precision.
[0023]
Further, the wedge-shaped stopper 15 determines the height of the contact roller 2 by adjusting the amount of movement of the wedge-shaped stopper 15 by the actuator 16, and the contact roller generated when air from the air cylinder 12 presses the contact roller 2. The pressing pressure can be adjusted by the deformation amount (δ in FIG. 2) of the surface rubber 17 of FIG.
[0024]
The contact roller 2 has a hollow structure, and has a bearing-like support component 19 between the inner diameter of the contact roller 2 and a central shaft 18 passing through the hollow. By disposing it at the position, it is possible to make the pressure distribution on the surface where the contact roller 2 contacts the work 8 uniform when a load is applied to both ends of the central shaft 18.
[0025]
【The invention's effect】
As described above, according to the polishing apparatus of the present invention, it is possible to reduce the expansion and contraction and speed fluctuation of the tape, to obtain a uniform polished surface, and to prevent uneven polishing by the processing amount adjusting apparatus. It becomes possible.
[0026]
In addition, the provision of the work transfer device including the pressure adjusting device, the linear motor, and the air slider enables the adjustment of the pressing pressure of the contact roller and the highly accurate adjustment of the polishing position.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a polishing apparatus of the present invention.
FIG. 2 is a front view and a side view of the pressure adjusting device of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 unwind roller 2 contact roll 3 feed roller 4 nip roller 5 take-up roller 6 work transfer device 7 torque control device 8 pressure adjustment device 9 speed control device 10 polishing tape 11 work 12 air cylinder 13 air supply port (pull side)
14 Air supply port (push side)
15 Wedge type stopper 16 Actuator 17 Surface rubber 18 Center shaft 19 Supporting parts

Claims (7)

An apparatus for polishing the surface of a work by contacting a polishing tape,
An unwinding roller that holds a web of polishing tape, a feed roller that unwinds the polishing tape from the unwinding roller, and a web transport device that includes a winding roller that winds the polishing tape,
A contact roll for pressing the polishing tape against the work,
A work transfer device for moving the work,
The work, a processing amount adjustment device that constantly and uniformly holds the processing amount near the contact point of the polishing tape,
A polishing apparatus comprising: The polishing apparatus according to claim 1,
The processing amount adjustment device,
A feed roller installed in proximity to the contact roller,
A torque control device for controlling a driving force of a rotating shaft of the unwinding roller,
A speed control device for controlling the speed of the feed roller,
A polishing apparatus, comprising: The polishing apparatus according to claim 1 or 2,
The processing amount adjustment device,
A pressure adjusting device that maintains a constant pressing pressure that presses the polishing tape against the work,
A polishing apparatus, comprising: The polishing apparatus according to any one of claims 1 to 3, wherein
The pressure adjusting device,
An air cylinder arranged at both ends of the contact roller and adjusting a pressing pressure of the contact roller,
An air supply port for adjusting the balance of air supplied to each of the push side and the pull side of the air cylinder,
A polishing apparatus, comprising: The polishing apparatus according to any one of claims 1 to 4, wherein
The pressure adjusting device,
A wedge-shaped stopper which is arranged at both ends of the contact roller and adjusts a pressing position and a pressing pressure of the contact roller;
A polishing apparatus, comprising: The polishing apparatus according to any one of claims 1 to 5, wherein
The contact roller,
It is a hollow contact roller that passes through the center shaft,
A bearing-like support component between the inner diameter of the contact roller and the central axis,
A polishing apparatus comprising: The polishing apparatus according to any one of claims 1 to 6, wherein
The work transfer device,
Linear motors and air sliders,
A polishing apparatus, comprising:

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