JPH085015Y2 - Grinding / polishing tool for irregular surfaces - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt grinding apparatus in which a polishing member is pressed against a deformed surface such as a concave portion or a curved portion of a material to be machined, so that the deformed surface is ground and polished.

[0002]

2. Description of the Prior Art When side-grinding a rectangular frame-shaped workpiece having inner and outer curved surfaces having irregularities such as curved surfaces, a grinding head provided with an abrasive is arbitrarily moved in the XY directions. Japanese Patent Laid-Open No. 64-45554 proposes a means for bringing an abrasive material into contact with an irregular surface so as to be movable so as to perform the grinding process. By the way, this means requires frequent replacement of the grinding and forming roll, which needs to be shaped on the peripheral surface in accordance with the irregular surface, in response to the wear, and is suitable for workpieces with different irregular surfaces. However, there is a drawback in that it is necessary to change the grinding molding roll, maintenance is troublesome, and running costs are high.

Therefore, a sanding frame is provided with a belt grinding unit which supports a forming roll which is driven and rotated in association with a drive source and a guide roll, and which is provided with a grinding belt around the roll group. A belt grinding device has been proposed which includes a grinding / polishing tool that is pressed against a deformed surface via a grinding belt.

[0004]

On the other hand, in the structure using the above-mentioned grinding / polishing tool, a processed material having a modified surface having a deep recess cannot be ground / polished. Therefore,
As shown in FIG. 6, a paper having an abrasive grain surface formed on one surface,
Using a polishing part a formed by stacking a plurality of square-shaped flexible polishing plates b made of polishing cloth paper or the like, a driven shaft c that is driven and rotated in association with a drive source is fixed to a sanding frame at the center thereof. Then, a grinding / polishing tool having a structure in which the polishing member is rotated is proposed. With this configuration, by inserting each corner of the polishing plate into the concave portion of the irregular surface of the processed material, it becomes possible to grind and polish the irregular surface having a deep concave portion.

By the way, in such a construction, the corners of the polishing plate become stiff and curved due to its use, so that the tips thereof cannot enter the recesses of the irregular surface. For this reason, the polishing plate must be replaced frequently, the work efficiency is low, and since only the corners of the polishing plate actually contribute to the grinding and polishing process, use a large-area polishing plate. However, only part of it contributed. Furthermore, since a large-area flexible polishing plate b is used as a point support at the center, it is easily bent excessively and warps to prevent it from entering the recesses, requiring replacement in a short time. Becomes For this reason, it was used frequently and was uneconomical. An object of the present invention is to eliminate the above-mentioned problems in a grinding / polishing tool that grinds and polishes a polishing surface having such a recess.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a mounting wheel centered and fixed to a driven shaft supported in association with a driving source has a polygonal surface having an abrasive grain surface formed along its outer peripheral edge. A plurality of shaped flexible polishing plates are stacked with a spacer interposed therebetween to form a plurality of polishing parts such that the corner edges of the flexible polishing plates project outward from the outer peripheral edge of the mounting wheel. It is a grinding and polishing tool for irregular surfaces, which is fixed.

[0007]

The plurality of polishing parts arranged along the outer peripheral edge of the mounting wheel sequentially come into contact with the processed material by the rotation of the drive shaft, and the square edges of the flexible polishing plate are It penetrates into the concave portion and is ground and polished. This polishing member is smaller than the conventional structure in which a single polishing member is pivotally supported. And
The flexibility of the flexible polishing plate of each polishing body lowers and bends,
Alternatively, when the polishing surface is worn, only each polishing body needs to be replaced. Alternatively, simply changing the support position of the flexible polishing plate and projecting unused corners from the outer peripheral edge of the mounting wheel can easily cope with the problem, resulting in high work efficiency and use of the flexible polishing plate. Large effective area possible.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the accompanying drawings. A belt grinding device to which the present invention is applied will be described below. 1 to 3, reference numeral 1 denotes a machine frame, a holding table 2 is provided on a table surface 1a thereof, and a holding portion 3 having a suction function by air suction is provided at each corner of the holding table 2. Then, the workpiece w consisting of a rectangular frame or the like is mounted on the holding portion 3 and sucked and held.

On the other hand, on the side wall portions 1b, 1b rising from both sides of the machine frame 1, screw guides 5a, 5b arranged in the front-rear direction are supported by bearings 6, 6, and one screw guide 5
A driven vehicle projecting from a gear box 7a provided at the end of a is linked to a front-rear traveling motor (not shown) by a chain, and a gear box 7b arranged at the end of the other screw guide 5b, and The driving force of the front-rear traveling motor 8 is transmitted to the other screw guide 5b by the connecting shaft 9 that is provided between the gear box 7a and the left-right screw guides 5a and 5b. The rotation is controlled in the same direction.

The screw guides 5a and 5b are provided on the traveling body 1.
0 are screwed together, and supported by guide strips 4, 4 formed on the side walls 1b, 1b in parallel with the screw guides 5a, 5b to drive the traveling body 10 in the left-right direction by driving the longitudinal motor 8. The movement is controlled. On the front surface of the running body 10, running guide strips 11 in the left-right direction are provided in parallel, and a running frame 12 is fitted to the running guide strips 11, 11. Then, the traveling frame 1 is inserted into the screw guides 13 extending left and right in the traveling body 10.
2 female screw 14 and screw guide 13 is connected to running body 1
The traveling frame 12 can be controlled to move in the left and right directions by the guide action of the traveling guide strips 11 by being rotated by the traveling motor 17 attached to the upper surface of one end of the zero.

An elevating frame 20 is disposed on the front surface of the traveling frame 12, and is engaged with an elevating screw 18 vertically inserted in the traveling frame 12 to be mounted on the traveling frame 12. The elevating screw 18 is rotated by driving 22 to guide the elevating frame 20 by the upper and lower elevating guide grooves 23 formed on the front surface of the traveling frame 12 so that the elevating control can be performed. Bearing cases 25a and 25b are attached to the lifting frame 20,
A horizontal rotation control motor 27 is disposed on the bearing case 25b via a pedestal 26, and the bearing case 2
The gate-shaped suspension frame 24 arranged in the lower part of 5 is rotated by the rotation control motor 27.

On both inner sides of the hanging portion of the suspension frame 24,
The arcuate guides 28, 28 are fixed, respectively. Then, the circular arc grooves 32 of the fan-shaped sliding plates 31 attached to both sides of the driving body 30 are fitted onto the circular arc guide 28 after the fixed circular arc pieces 33 are brought into contact with the circular arc guide 28 from below. This sliding plate 3
An arc gear 34 is formed on the upper edge of the gear 1.
The drive body 30 can be tilted along the arc-shaped guide 28 by rotating the tool with a tool.

Connection frame 3 for fixing the sliding plate 31 to the left and right
A rotary motor 37 is arranged on the motor 6, and the continuous rotary body 41 is driven by the motor 37. A connecting plate 40 made of a magnet having a smooth lower surface is disposed directly below the rotary motor 37 on the lower surface of the connecting frame 36 of the driving body 30.

A grinding / polishing tool 50 according to the present invention is disposed below the driving body 30. The structure of the grinding / polishing tool 50 will be described. Reference numeral 51 denotes a plate-shaped sanding frame, and a contacted plate 52 fixed to the upper surface of the sanding frame is joined to and held by the connecting plate 40. At the end of the sanding frame 51, a driven shaft 54 having a continuous driven body 53 at its upper part is rotatably inserted, and a mounting wheel 55 is supported by the driven shaft 54. Then, with the sanding frame 51 joined and held to the connecting plate 40, the continuous rotating body 41 and the continuous driven body 53 are connected, and the driving force of the rotary motor 37 is attached by the driven shaft 54. It will be conducted to the wheel 55.

The mounting wheel 55 has a disc shape as shown in FIG. 4, and has a constant angle interval (in the figure) along its outer peripheral edge.
At 30 °), the plurality of polishing parts 57 are fixed so as not to rotate. An abrasive grain surface is formed on one surface of the polishing part 57, and a plurality of square flexible polishing plates 58a and 58b, each having a pair of abrasive grain surfaces opposed to each other, are disposed via a spacer 59 and a pressure plate 60. Overlap and fix this with bolts 61,
The mounting wheels 55 are attached to the corner edges of the flexible polishing plates 58a and 58b.
It is designed to project outward from the outer peripheral edge of.

Here, each of the flexible polishing plates 58a and 58b is
As shown in FIG. 4, the angle is different for each pair. That is, in the polishing of the processed material w, what actually contributes is the corner edge protruding from the outer peripheral edge of the mounting wheel 55 as described above. Therefore, the flexible polishing plates 58a and 58b are shifted in pairs so that a plurality of corner edges are projected to increase the effective polishing portion. In FIG. 4, the overlay misalignment angle is 30.
Although the angle is set to °, this angle can be made smaller if necessary.

Each pair of flexible polishing plates 58a, 58b
The support angles are matched so that they overlap in a uniform manner, but this may be shifted. In this case, each flexible polishing plate 5
8a and 58b are warped to the outside where the abrasive grain surface is not formed by continuous use and are less likely to enter the concave portion of the irregular surface f,
By shifting this position, it is expected that the warp position will be dispersed and will easily enter the recess.

Next, the structure of the polishing body 57 is shown in FIGS. 5a to 5e.
Follow the instructions below. 5a (FIG. 4) shows the mounting wheel 5
5, a connecting collar 56 is provided around the edge, and the polishing body 57 is fixed to the connecting collar 56 with bolts 61 at regular intervals. The flexible polishing plates 58a and 58b are parallel to each other in the plane direction. I support you. FIG. 5 b shows the mounting wheel 55 with a bifurcated support edge 6
2, 62 are formed, the flexible polishing plates 58a, 58b are supported by the bolts 61 between the support edges 62, 62, and the corner edges thereof are projected outward from the outer peripheral edge of the mounting wheel 55. .

FIGS. 5c to 5e show a construction provided with a polishing part body 57 having a sharp tip for optimum grinding and polishing of a workpiece w having a modified surface f having a deep recess. In each case, the inclined seat surface 6 is provided along the outer peripheral edge of the mounting wheel 55.
3 and 63 are formed, and flexible polishing plates 58a and 58b are laminated on the inclined seat surfaces 63 and 63, respectively. Here, FIG. 5c shows a flexible polishing plate 5 in which screw holes 64 are formed in the inclined seat surfaces 63, 63 and are laminated on the inclined seat surfaces 63, 63, respectively.
Bolts 61, 61 are inserted into 8a, 58b and screwed into the screw holes 64 to hold the polishing body 57 such that its corner edges project from the outer peripheral edge of the mounting wheel 55. With this configuration, the flexible polishing plates 58a, 5a
8b are evenly laminated with respect to the inclined seat surfaces 63, 63, and as a result, the end portion of the polishing portion 57 has a dogleg shape.

5d and 5e, the flexible polishing plates 58a and 5b are slanted corresponding to the slanting angles of the slanted seating surfaces 63 and 63, respectively.
8b are laminated so that the edge of the polishing part 57 is perpendicular to the main surface of the mounting wheel 55. In this case, the deformed surface f having a flat groove recess is formed.
It is effective when grinding. Here, FIG. 5d shows flexible polishing plates 58a and 58b arranged on the inclined seat surfaces 63 and 63, respectively.
Are fixed with different bolts 61, 61, respectively,
In FIG. 5e, a single bolt 61 is passed through the end edge of the mounting wheel 55, and a pressing plate 60 having a supporting surface along the inclined seat surfaces 63, 63 is arranged on the outermost surface of the flexible polishing plates 58a, 58b. In addition, the tip of the bolt 61 is projected from one of the inclined seat surfaces 63, 63 and tightened with a nut 65.

In the above structure, the rotation control motor 27
Is driven to rotate the driving body 30 and the connecting plate 40, and the mounting wheel 55 is positioned to face the required deformed surface f of the workpiece w. Then, the forward / backward traveling motor 8 is controlled to move, the traveling body 10 is moved in the X direction in FIG. 1, the traveling motor 17 is controlled to move, the traveling frame 12 is moved in the Y direction, and the lifting motor 22 is drive-controlled. The elevating frame 20 is moved up and down with respect to the traveling frame 12. Then, if necessary, the gear 35 is rotated to tilt the mounting wheel 55. This enables grinding even if the irregular surface is on the upper surface.

Thus, the front-rear traveling motor 8 and the traveling motor 1
By the control of 7, the grinding / polishing tool 50 runs along the irregular surface, and the corner edges of the flexible polishing plates 58a, 58b of the respective polishing parts 57 arranged on the mounting wheel 55 are rotated by the mounting wheel 55. As a result, the deformed surface f of the processed material is sequentially pressure-contacted, enters deeply into the concave portion, and travels while rubbing against the deformed surface f, whereby grinding and polishing of the deformed surface f of the material to be processed w can be performed without trouble. Becomes

Here, due to the continuous polishing, the corner edges of the flexible polishing plates 58a and 58b are respectively warped outward or worn. In this case, the bolts 61 can be loosened to rotate the flexible polishing plates 58a and 58b, and unused corners can be projected from the outer peripheral edge of the mounting wheel 55.

Further, each polishing body 57 is composed of a plurality of polishing portions which are finely used as compared with the conventional structure in which conventional flexible polishing plates are laminated to form a polishing body and the center of the polishing body is supported. Body 5
7 is supported by a mounting wheel 55, and a flexible polishing plate 58
Since the corner edges of a and 58b are projected outward from the outer peripheral edge of the mounting wheel 55, the flexible polishing plate 58
The usable area ratio of a and 58b is high, and it can be effectively used and is economical.

In the above embodiment, the flexible polishing plate 58 is used.
I used a square shape for a and 58b.
Other polygonal shapes such as a pentagon may be used.

[0026]

According to the present invention, the polishing body 5 is formed by laminating the flexible polishing plates 58a and 58b on the periphery of the mounting wheel 55 which is centrally fixed to the driven shaft 54 which is supported in association with the drive source.
7 is provided so that the corners of the flexible polishing plates 58a and 58b project from the outer peripheral edge of the mounting wheel 55, and
0, a flexible polishing plate is laminated to form a polishing member, and a plurality of polishing members are used by finely using the flexible polishing plate, as compared with the conventional structure in which the center is supported. Since 57 is supported by the mounting wheel 55, when the flexible polishing plates 58a, 58b are warped outward or worn due to the continuous polishing, the flexible polishing plates 58a, 58b
By simply changing the support position of 58b and projecting unused corners from the outer peripheral edge of the mounting wheel 55, the work efficiency can be improved and the flexible polishing plates 58a, 58 can be used.
The usable effective area of b is wide. Also, the mounting wheel 5
Since the warp of the flexible polishing plates 58a and 58b is limited to the projecting portion from the peripheral edge of the mounting wheel 55, the flexible polishing plates 58a and 58b are stiff, the warp is small, and the life is long. Therefore, the flexible polishing plates 58a and 58b can be effectively used, which is advantageous in that it is economical.

[Brief description of drawings]

FIG. 1 is a front view of a belt grinding device to which the present invention is applied.

FIG. 2 is a plan view of the same.

FIG. 3 is a partially cutaway side view of a main part.

FIG. 4 is a plan view of a mounting wheel 55.

FIG. 5a is a vertical sectional side view showing an embodiment of a polishing body 57.

FIG. 5b is a vertical cross-sectional side view showing an embodiment of a polishing body 57.

FIG. 5c is a vertical cross-sectional side view showing an embodiment of a polishing part body 57.

FIG. 5d is a vertical cross-sectional side view showing an embodiment of a polishing body 57.

FIG. 5e is a vertical cross-sectional side view showing an embodiment of a polishing body 57.

FIG. 6 is a front view showing an outline of a conventional grinding / polishing apparatus.

[Explanation of symbols]

 50 Grinding / polishing tool 54 Driven shaft 55 Mounting wheel 57 Polishing parts 58a, 58b Flexible polishing plate w Worked material f Deformed surface

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A mounting wheel centered on a driven shaft supported in cooperation with a drive source, and having a surface along an outer peripheral edge thereof.
Place a polygonal flexible polishing plate with an abrasive grain surface on the
The polishing part made by stacking multiple
Edge of the abrasive polishing plate protrudes outward from the outer peripheral edge of the mounting wheel
In this manner, a plurality of irregular surface grinding and polishing tools are fixed.