JP2005022025A - Polishing device of hole inner peripheral surface of sheet glass or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve working quality and stabilize the working quality by equalizing pressure contact force of a polishing body to a workpiece, and to prevent occurrence or the like of a crack by preventing rapid movement of the workpiece caused by an external impact or the like acting on the workpiece. <P>SOLUTION: This polishing device 1 of a hole inner peripheral surface of a sheet glass or the like polishes the inner peripheral surface of a hole H formed in the workpiece W such as the sheet glass and performs chamfering. The polishing device comprises: a loading table 15 for loading the workpiece W; a fixing clamp 17 for fixing the workpiece W onto the loading table 15; a rotary motor 53 for rotating the loading table 15; a sliding mechanism for making the loading table 15 slide horizontally; a polishing body 21 that directly abuts on the inner peripheral surface of the hole H and performs polishing, a driving motor 33 as a driving means of a polishing object 21; and a pressurizing means for keeping constant the pressure contact force of the polishing body 21 to the inner peripheral surface of the hole H. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to, for example, a hole inner peripheral surface polishing apparatus such as a glass plate suitable for polishing an inner peripheral surface of a hole for a stove formed in a top plate for a gas range made of heat-resistant glass.
[0002]
[Prior art]
A conventional top plate for a gas range has been processed by press forming an iron plate, a stainless steel plate or the like to form a desired shape, and appropriately performing a surface treatment such as painting or plating. Recently, an embedded gas range called a built-in type in which the upper surface of the sink or cooking table is flat has appeared in addition to the mounting type gas range that is placed on a sink or cooking table.
[0003]
Under such a background, recently, a thing using heat-resistant glass has appeared as a top plate for a gas range. In order to process such a top plate, polishing is performed in order to pierce the hole for the stove and remove burrs and the like on the inner peripheral surface, and to perform chamfering and the like.
However, as is well known, heat-resistant glass is resistant to heat, but has a characteristic that it is weak against impact and easily broken. Therefore, when the workpiece is suddenly moved due to an external impact or the like during the polishing process, there is a possibility that a crack called a crack may be generated or damaged. Therefore, conventionally, polishing is performed manually, and fine adjustment of the pressure contact force of the polishing body and countermeasures against sudden movement of the work are performed by the delicate intervals of the hands that have been cultivated by skilled workers.
[0004]
[Problems to be solved by the invention]
However, in order to further improve the processing quality, stabilize the processing quality or increase the productivity, it has been extremely difficult to achieve this by relying on manual polishing that requires skill so far. There was an indispensable and urgent issue.
Accordingly, the present invention has been made in view of such a need, and improves the processing quality by stabilizing the pressure contact force of the polishing body against the workpiece, and stabilizes the processing quality. Further, it prevents a sudden movement of the work caused by an external impact or the like on which the work acts, thereby preventing the occurrence of cracks. And it aims at providing the hole inner peripheral surface grinding | polishing apparatus, such as a glass plate, which show | plays such an effect.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a mounting table for mounting a workpiece in a polishing apparatus that polishes an inner peripheral surface of a hole formed in a workpiece such as a glass plate and performs chamfering or the like. And a fixed clamp for fixing the work on the mounting table, a rotation motor for rotating the mounting table, a slide mechanism for sliding the mounting table in the horizontal direction, and abutting directly on the inner peripheral surface of the hole portion for polishing. A glass plate comprising: a polishing body for performing polishing; a drive motor which is a driving means for the polishing body; and a pressurizing means for keeping the pressure contact force of the polishing body against the inner peripheral surface of the hole portion constant It is a hole part inner peripheral surface grinding | polishing apparatus, such as.
[0006]
According to a second aspect of the present invention, in the hole inner peripheral surface polishing apparatus for a glass plate or the like according to the first aspect, the slide mechanism is a guide rod and a slider that are guide means for sliding the mounting table in one horizontal direction, An apparatus for polishing an inner peripheral surface of a hole, such as a glass plate, comprising a shifter as a driving means.
[0007]
According to a third aspect of the present invention, in the inner peripheral surface polishing apparatus for a hole portion such as a glass plate according to the second aspect, the shifter is constituted by an air cylinder, and as a shock absorber for preventing a sudden movement of the workpiece during polishing processing. It is a hole inner peripheral surface polishing apparatus such as a glass plate characterized by functioning.
[0008]
According to a fourth aspect of the present invention, in the apparatus for polishing an inner peripheral surface of a hole portion such as a glass plate according to any one of the first to third aspects, the pressurizing means connects the pressurizing weight, the pressurizing weight, and the mounting table. It is comprised by the wire to carry out, The hole inner peripheral surface grinding | polishing apparatus, such as a glass plate characterized by the above-mentioned.
[0009]
According to a fifth aspect of the present invention, in the hole inner peripheral surface polishing apparatus for a glass plate or the like according to the fourth aspect, the pressurizing weight is provided in a suspended state, and the workpiece material, the plate thickness, or the shape of the hole portion. An apparatus for polishing an inner peripheral surface of a hole portion of a glass plate or the like, comprising a combination of a plurality of small weights having a predetermined unit weight so that the weight can be appropriately adjusted according to the size and the like.
[0010]
In order to avoid contact with the polishing body on the center upper surface of the mounting table in the inner peripheral surface polishing apparatus for holes such as the glass plate according to any one of claims 1 to 5, An apparatus for polishing an inner peripheral surface of a hole, such as a glass plate, characterized in that a relief portion formed in a concave shape is formed.
[0011]
According to a seventh aspect of the present invention, in the hole inner peripheral surface polishing apparatus for a glass plate or the like according to any one of the first to sixth aspects, the rotation of the output shaft of the rotary motor is mounted via a chain drive type drive transmission mechanism. The inner periphery of a hole of a glass plate or the like, which is transmitted to a rotating shaft extending downward from the center of the mounting table, and is set so as to correspond to the swinging motion of the chain when the mounting table slides This is a surface polishing apparatus.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
In the following description, as an example, the work W is made of a heat-resistant glass top plate for a gas range, and the inner peripheral surface of the stove hole H formed on the work W is polished. The structure of the hole inner peripheral surface polishing apparatus 1 of the present invention and its operating state will be described in this order.
[0013]
The hole inner peripheral surface polishing apparatus 1 includes a support frame 3 having a rectangular frame shape. Four bearing members 5 such as pillow blocks are provided on the upper surface of the support frame 3, and one guide rod 7 using the two bearing members 5 is used as the other two bearing members. 5 is used to provide another guide rod 7.
[0014]
The two guide rods 7 are horizontally supported with a certain interval, and each of the guide rods 7 is provided with two sliders 9 slidably. The guide rod 7 and the slider 9 constitute a part of a slider mechanism as guide means for sliding the mounting table 15 in one horizontal direction.
A rectangular flat plate-like slide base 11 is attached to the upper surface of the slider 9. A bearing portion 13 is provided at the center of the slide base 11 and receives a rotating shaft 16 extending downward from the center of the mounting table 15 and rotatably supports the rotating shaft 16.
The mounting table 15 is a disk-like member that is somewhat thicker than the slide base 11, and a toggle type manual clamp 17 is provided on the upper surface thereof as a fixing clamp for fixing the workpiece W on the mounting table 15. Base is provided.
[0015]
The member shown by the code | symbol 18 is a ruler, and three sets are provided as an example. The position of the workpiece W is determined using these rulers 18, and the adjustment of the mounting position of the workpiece W is facilitated.
On the central upper surface of the mounting table 15, a relief portion 19 is formed that is hollowed out in a cylindrical recess shape in order to avoid contact with a polishing body 21 described later. On one side surface of the support frame 3, a support frame 23 having a U-shaped cross section and an inverted L shape in front view is provided in a fixed state.
At the front end of the horizontal portion 25 of the support frame 23, a polishing body 21 that directly contacts the inner peripheral surface of the hole H via an elevating mechanism 29 and a drive motor 33 that is a driving means thereof are provided.
[0016]
As the elevating mechanism 29, a mechanism using a link mechanism can be applied as an example. In the present embodiment, a manual operation lever 31 is also provided that enables the polishing body 21 and the drive motor 33 to move up and down when not operating. . The vertical portion 27 of the support frame 23 is a portion fixed to the support frame 3, and a wire L having one end fixed to the slide base 11 is disposed slightly above the center of the vertical portion 27. An opening (not shown) is provided for pulling out in the direction.
A pulley 37 is provided in the opening, and the wire L drawn outward from the opening is wound around the pulley 37, changes downward by 90 ° and hangs downward, and is attached to the end of the pressurizing means. The pressure weight 39 which is an example is suspended.
[0017]
The pressurization weight 39 connects a plurality of small weights 41 having a predetermined unit weight in series so that the weight can be appropriately adjusted according to the material and thickness of the workpiece W or the shape and size of the hole H. Is made up of. Further, by providing the pressure weight 39, the pressure contact force of the polishing body 21 with respect to the inner peripheral surface of the hole H in the workpiece W becomes uniform, and a stable polishing process is realized.
As shown in the figure, the polishing body 21 is a relatively thick disk-shaped member, and a U-shaped groove portion 43 that is a substantial polishing action portion is formed near the center of the peripheral body portion.
[0018]
In addition to the slide base 11, a main body portion 47 of an air cylinder 45, which is an example of a shifter that constitutes a part of a slide mechanism as a driving means for sliding the slide base 11, is rotatable up and down via a bracket 49. It is attached in the state.
A male screw is cut at the end of the sliding portion 50 of the air cylinder 45 and is fixed to the vertical portion 27 of the support frame 23 using a nut. The air cylinder 45 also functions as a shock absorber that reduces external impacts applied to the workpiece W during polishing and prevents the workpiece W from moving suddenly.
[0019]
A driven sprocket 51 is attached to the rotary shaft 16 that extends downward from the center of the mounting table 15. In addition, a rotation motor 53 for rotating the mounting table 15 is provided on the front surface of the support frame 3, and a drive sprocket 55 is attached to the output shaft of the speed reducer 54 connected via a belt drive mechanism. It has been.
Further, a chain 57 is wound between the driven sprocket 51 and the drive sprocket 55, and a chain drive type drive transmission mechanism is constituted by these.
[0020]
The distance between the driven sprocket 51 and the drive sprocket 55 can vary somewhat within the moving range of the slide base 11 on the assumption that the winding state of the chain 57 is ensured. Although illustration is omitted, it is also possible to employ a configuration in which a tension sprocket or the like is provided as necessary to make the winding state of the chain 57 more reliable.
In addition, a square box container-like liquid tank 59 having an open upper surface is provided inside the support frame 3. In this liquid tank 59, a polishing liquid G made of water or the like supplied to the polishing surface in order to increase the polishing efficiency of the polishing body 21 is stored together with the polishing powder.
[0021]
A control box 61 that controls the hole inner peripheral surface polishing apparatus 1 is provided near the base of the horizontal portion 25 of the support frame 23. A timer 62 is provided in the control box 61, and the rotational speed of the mounting table 15 can be adjusted by operating the timer 62. As with the timer 62, an adjustment handle 64 that is manually operated is provided on the front side of the support frame 3 as a member that can adjust the rotation speed of the mounting table 15. In addition, a scattering prevention curtain 63 for preventing the polishing powder and the polishing liquid G from scattering around the polishing body 21 is provided.
[0022]
In the horizontal portion 25 of the support frame 23, two safetys for stopping the operation by shutting off the power supply to the rotary motor 53 when the mounting table 15 is accidentally rotated without the manual clamp 17 being clamped. A limit switch 65 is provided.
One of the safety limit switches 65 is provided on the assumption that it abuts on the manual clamp 17 located on the inner peripheral side, and the other safety limit switch 65 is located inside the rotation flap 67. Therefore, although not shown in the figure, the manual clamp 17 located on the outer peripheral side is operated by coming into contact with the rotating flap 67.
[0023]
Next, a procedure for polishing the inner peripheral surface of the hole H formed in the workpiece W will be described together with the operation state of the hole inner peripheral surface polishing apparatus 1.
The operator places the workpiece W to be processed on the placement table 15, positions it using the ruler 18, aligns the hole H near the center of the escape portion 19, and places the placement table by the manual clamp 17. 15 is fixed on. Also, the polishing body 21 having a size and shape suitable for processing is selected and mounted in accordance with the plate pressure of the workpiece W, the size of the hole H, and the like.
[0024]
Next, the air cylinder 45 is extended so that the inner peripheral surface of the hole H in the workpiece W comes into contact with the groove 43 in the polishing body 21. In this state, the start switch is pushed to rotate the drive motor 33 and the rotary motor 53, and supply of the polishing liquid G is started. Further, the lifting mechanism 29 is lowered. The drive motor 33 rotates at high speed, and rotates the polishing body 21 attached to the output shaft at high speed.
On the other hand, the rotary motor 53 rotates at a low speed, and rotates the mounting table 15 through the speed reducer 54 and the chain 57 by about one to three rounds by one polishing process. The rotation speed of the mounting table 15 is related to the processing quality, and the timer 62 or the adjustment handle 64 is operated to adjust the rotation speed to an optimum value so that the desired processing quality can be obtained.
[0025]
The amount scraped off by the polishing process in one stroke is about 1 mm, and this increases the inner diameter of the hole H by about 2 mm. Further, due to the shape of the groove 43 in the polishing body 21, the edge portion of the inner peripheral surface of the hole H is chamfered into a round shape.
Even if the mounting table 15 is accidentally rotated in a state where the clamping of the manual clamp 17 is not completed, a part of the manual clamp 17 directly contacts the detection bar of the safety limit switch 65 or a rotating flap. Since the safety limit switch 65 located inside thereof is pressed to stop the rotation of the mounting table 15 by coming into contact with 67, safety is also taken into consideration.
[0026]
Further, since the mounting table 15 constantly receives a tensile force from the pressure weight 39, the inner peripheral surface of the hole H in the workpiece W fixed on the mounting table 15 is always polished by a constant pressure force. It is in a state where it is pressed against.
In addition, since the air cylinder 45 in the extended state tries to maintain the position as it is, it functions as a shock absorber even if the workpiece W moves suddenly, and the sudden movement of the workpiece W is prevented. Occurrence of cracks and the like of the workpiece W due to this is also prevented.
By the above action by the pressure weight 39 and the air cylinder 45, stable polishing of the hole H is automatically and continuously performed.
[0027]
When the predetermined polishing process is completed, the drive motor 33 and the rotation motor 53 are stopped automatically or manually. At the same time, the air cylinder 45 is contracted to release the contact state between the polishing body 21 and the inner peripheral surface of the hole H in the workpiece W.
Further, the lifting mechanism 29 operates to move the polishing body 21 upward. Then, after confirming that the mounting table 15 is completely stopped, the clamping by the manual clamp 17 is released, the mounting position of the workpiece W is shifted, and the other holes H are polished in the same procedure as described above. Alternatively, the hole H is polished by exchanging with another workpiece W.
[0028]
The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to this embodiment, and the present invention can be changed even if there is a design change without departing from the gist of the present invention. include.
For example, the shape of the mounting table 15 is not limited to a disk shape, but may be a rectangular plate shape or a polygonal plate shape, or may be formed by an elliptical or oval plate-like member. In addition to the structure in which the mounting table 15 is continuously rotated at a constant rotational speed, it is possible to adopt a structure in which rotation and sliding are repeated to rotate intermittently. FIG. 6 shows an embodiment thereof, and shows a case where the inner peripheral surface of a rectangular hole H having rounded portions 69 at the four corners is polished. Specifically, as shown in the figure, when the rounded portion 69 of the hole H is being processed, the mounting table 15 is rotated, and when the straight portion 71 of the hole H is being processed, the rotation is stopped. And slide in a predetermined direction.
[0029]
Further, by attaching the polishing body 21 to a milling machine or the like that is a machine tool, it is possible to polish the inner peripheral surface of the hole H having a more complicated shape. However, in that case, the mounting table 15 can move in any direction on the horizontal plane, and more precise and multi-directional movement is required so as to cope with a sudden movement in any direction on the horizontal plane. Therefore, in order to make this possible, a plurality of air cylinders 45 and pressure weights 39 are provided, or they are combined with other mechanisms such as an automatic alignment mechanism using an XY table or a magnet.
Moreover, the workpiece | work W which is the process target of this invention is not restricted to heat-resistant glass, All other glass, such as crystallized glass, is also contained.
Furthermore, not only glass but other materials such as ceramics can be selected. Further, by using a plurality of polishing bodies 21 or using a polishing body 21 having a plurality of groove portions 43, it is possible to perform polishing at once in a state where a plurality of workpieces W are overlapped.
[0030]
【The invention's effect】
According to the present invention, since the pressure contact force of the polishing body against the workpiece can be made uniform, the processing quality of the inner peripheral surface of the hole H is improved, and the processing quality is also stabilized. Further, since the workpiece is prevented from suddenly moving due to an external impact or the like, there is no problem of occurrence of cracks or breakage, which becomes a problem when a brittle and fragile material such as a glass plate is used.
[Brief description of the drawings]
FIG. 1 is a front view showing a hole inner peripheral surface polishing apparatus for a glass plate or the like according to an embodiment of the present invention.
FIG. 2 is a side view of the hole inner peripheral surface polishing apparatus of FIG. 1;
3 is a side view showing an operating state of a mounting table in the hole inner peripheral surface polishing apparatus of FIG. 1; FIG.
4 is a plan view showing an operating state of a mounting table in the hole inner peripheral surface polishing apparatus of FIG. 1; FIG.
5 is a perspective view from obliquely rearward showing the vicinity of a safety limit switch in the hole inner peripheral surface polishing apparatus of FIG. 1. FIG.
FIG. 6 is a plan view showing a movement trajectory of a workpiece in a hole inner peripheral surface polishing apparatus according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hole inner peripheral surface grinding | polishing apparatus 3 Support stand 5 Bearing member 7 Guide rod 9 Slider 11 Slide base 13 Bearing part 15 Mounting table 16 Rotating shaft 17 Manual clamp (fixed clamp)
18 Ruler 19 Escape Part 21 Polishing Body 23 Support Frame 25 Horizontal Part 27 Vertical Part 29 Elevating Mechanism 31 Operation Lever 33 Drive Motor 37 Pulley 39 Pressurizing Weight 41 Small Weight 43 Groove Part 45 Air Cylinder 47 Body Part 49 Bracket 50 Sliding Part 51 Follower sprocket 53 Rotating motor 54 Reduction gear 55 Drive sprocket 57 Chain 59 Liquid tank 61 Control box 62 Timer 63 Splash prevention curtain 64 Adjustment handle 65 Safety limit switch 67 Rotating flap 69 Round part 71 Linear part W Work H Hole part L Wire G Polishing liquid

Claims (7)

In a polishing apparatus that polishes the inner peripheral surface of a hole formed in a workpiece such as a glass plate and performs chamfering processing, etc., a mounting table for mounting the workpiece, a fixed clamp for fixing the workpiece on the mounting table, Rotating motor that rotates the mounting table, slide mechanism that slides the mounting table in the horizontal direction, a polishing body that directly contacts the inner peripheral surface of the hole to perform polishing, and a driving motor that is a driving means for the polishing body And an inner peripheral surface polishing apparatus for a hole portion such as a glass plate, characterized by comprising: a pressing means for keeping the pressure contact force of the polishing body against the inner peripheral surface of the hole portion constant. 2. The apparatus for polishing an inner peripheral surface of a hole portion such as a glass plate according to claim 1, wherein the slide mechanism is constituted by a guide rod and a slider which are guide means for sliding the mounting table in one horizontal direction, and a shifter which is a drive means thereof. An apparatus for polishing an inner peripheral surface of a hole such as a glass plate. The hole inner peripheral surface polishing apparatus for a glass plate or the like according to claim 2, wherein the shifter is constituted by an air cylinder, and functions as a shock absorber for preventing a sudden movement of the workpiece during polishing processing. An inner peripheral surface polishing apparatus for holes such as glass plates. The hole inner peripheral surface polishing apparatus for a glass plate or the like according to any one of claims 1 to 3, wherein the pressurizing means includes a pressurizing weight and a wire connecting the pressurizing weight and the mounting table. A hole inner peripheral surface polishing apparatus for a glass plate or the like. 5. The apparatus for polishing an inner peripheral surface of a hole portion such as a glass plate according to claim 4, wherein the pressure weight is provided in a suspended state, and is appropriately determined according to the material and thickness of the workpiece, the shape and size of the hole portion, and the like. An apparatus for polishing an inner peripheral surface of a hole, such as a glass plate, comprising a plurality of small weights each having a predetermined unit weight so that the weight can be adjusted. 6. A hole inner peripheral surface polishing apparatus for a glass plate or the like according to any one of claims 1 to 5, wherein the center upper surface of the mounting table has a relief portion that is grooved in order to avoid contact with the polishing body. An apparatus for polishing an inner peripheral surface of a hole portion such as a glass plate. The hole inner peripheral surface polishing apparatus for a glass plate or the like according to any one of claims 1 to 6, wherein the rotation of the output shaft of the rotary motor extends below the center of the mounting table via a chain drive type drive transmission mechanism. An apparatus for polishing an inner peripheral surface of a hole, such as a glass plate, which is transmitted to a shaft and set so as to respond to a sliding motion of a mounting table by a swinging motion of a chain.

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