JPS582007B2 - band saw polishing device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a band saw polishing device.

Band saws have a part called a clam, which has a wide cutting edge to prevent the saw blade from rubbing against the sawn material, but if the shape and width of this clam are not the same, the sawn material Differences in resistance cause vibration, which worsens the grinding surface.
This results in inferior durability.

Clams are finished by polishing after swaging and shaving, but conventional side polishing involves installing grindstones that can move back and forth on both sides of a band saw that is moved intermittently on a horizontal guide. This is done by synchronizing the advance and retreat of the whetstone with movement, and the sharpness tends to be polished according to the uneven shape of the clam, which has an uneven degree of protrusion from side to side. When using a band saw that can be hung in a state,
The set widths in the vertical direction are not uniform, and the above-mentioned drawbacks still remain unresolved.

The present invention has been made with attention to the above-mentioned points, and its purpose is to hang a band saw against the upper and lower saw wheels in a tensioned state similar to when sawing wood, rotate it, and to rotate the band saw in this state. A band saw polishing device that enables consistent polishing of each set so that the width of each set forms the same movement trajectory during tension sawing by continuously operating the grindstone on both sides of the blade. It is on offer.

Another object of the present invention is to provide a grindstone so as to be movable back and forth with respect to the bandsaw, and also to provide a celery that comes into contact with the rear end of the band saw while it is rotating, so that the celery is able to move back and forth when the band saw is rotating. To provide a polishing device for a band saw, which moves a grindstone back and forth by following the movement of the band saw, thereby preventing excessive polishing or non-polishing from occurring when the band saw moves back and forth.

An embodiment of the present invention will be described below with reference to the drawings.
A is a band saw machine, and band saw B is connected to the upper and lower saw wheels 1 and 1'.
is applied and tensioned by a tensioning device in a known manner.

C is a polishing device, which has movable plates 3 on the left and right with respect to the base 2,
3 is provided so as to be slidable in the left-right direction via its guide portion 2a, and grinding wheels 4, 4 and their drive motors 5, 5 are provided to the movable plates 3, 3.

The pair of grindstones 4, 4 are set to expand forward along the clearance angle of the clam, and by changing the mounting position of the bearings 6, 6 with respect to the movable plates 3, 3, the grindstones can be adjusted. The expansion angle is adjusted.

Drive bolts with opposite thread groove directions are threaded in the center of the left and right movable plates 3, 3, and their mutual contact and separation can be adjusted by rotating the handle 7.

When the grindstones 4, 4 are in an expanded state, their outer peripheral portions are in contact with the oblique side portions of the clams B1.

A support arm 8 is attached to the base 2, and the support arm 8 is provided with a celery 9 that comes into contact with the rear end of the saw blade B2 of the band saw B at the rear of the grindstone 4. Support arms 10, 10 are erected, and the support arms 10,
10 is provided with lateral deflection prevention series 11, 11 that are in contact with the side surface of the saw blade portion B2 in a portion close to the blade portion.

The base 2 is provided so as to be slidable in the front and rear directions relative to a displacement base 12 at the bottom thereof, and a drive bolt is screwed into the base 2, and by rotating the handle 13, the base 2 can be moved forward on the base 2. Or retreat.

At the center of the lower part of the displacement base 12, there is a bearing part 1 extending in the left-right direction.
2a is provided in the upper part of the base plate 14.
The supporting shaft 15 is located between the bearing portions 12a and 14a.
is provided.

Therefore, the displacement base 12, ie, the polishing device C, tilts back and forth about the shaft 15.

Support bolts 16, 16 that move forward and backward with respect to the base plate 14 are provided at the front and rear of the displacement base 12.

The base plate 14 is fixed on the material transport vehicle 17, but may be directly fixed on the surface plate.

In the above configuration, during use, the support bolts 16,
16 is advanced and brought into contact with the bed plate 14, the displacement base 12 is held in a horizontal state, and the handle 13 is rotated to bring the celery 9 into contact with the rear end of the band saw B under tension, and the handle 7 is held in a horizontal state. Rotate the whetstones 4, 4 and celery 11,
11 is brought into contact with the sides of the blade part and the saw blade part, and then the support bolts 16, 16 are retreated from the base plate 14.

In this state, the center of gravity of the polishing device C is tilted in front of the shaft 15, and the polishing device C tries to tilt forward, but since the celery 9 is in contact with the band saw B, the tilting is prevented. is being prevented.

Next, with the motors 5, 5 driven and the grindstones 4, 4 in operation, the saw wheels 1, 1' are manually rotated, and the band saw B is rotated two or three times to carry out break-in polishing.

By this operation, it is possible to prevent the abnormally protruding portion of the clam B1 from being chipped due to rapid high-speed polishing work.

Next, the motor of the band saw machine A is rotated to move the band saw B at a rate of 8,000 to 15,000 feet/minute, similar to the sawing operation, and this time can be achieved in an extremely short time of several seconds.

At this time, the grindstones 4, 4 rotate in the same direction as the moving direction of the band saw B at a high speed higher than the transfer speed of the band saw B.

Figure 5A shows the normal rotating state of the band saw B. When the band saw B is displaced forward from this state, the polishing device C is rotated by the shaft 1.
The grinding wheel 4 tilts forward due to the center of gravity using the fulcrum 5, and the grinding wheel 4 also moves forward (FIG. 5 b).

Next, when the band saw B moves backward, the polishing device C tilts backward against the center of gravity via the celery 9, and the grindstone 4 also moves backward (FIG. 5C).

Since the present invention is constructed as described above, it is possible to significantly reduce sawing resistance, improve the sawn texture, and greatly improve the durability of the band saw. .

In particular, since the grinding wheel can be moved back and forth as the band saw moves back and forth during rotation, uneven polishing can be avoided.
This is effective in forming a protruding shape of the clam that is aligned in the axial direction of the band saw.

[Brief explanation of the drawing]

Fig. 1 is an overall view of the device used to carry out the present invention, Fig. 2 is a front view of the main parts of the same, Fig. 3 is a side view of the main parts, and Fig. 4 is a plan view showing the cutting state of the band saw. , FIG. 5 is an explanatory diagram of the back and forth movement of the polishing device. A... Band saw machine, B... Band saw, B1...
...Blade part, B2...Saw blade part, C...Grinding device, 1,1'...Saw wheel, 4,4...
・Whetstone, 9...Cerry.

Claims (1)

[Claims] 1 Consists of a device that is installed between the upper and lower saw wheels and performs polishing work on both sides of the blade of the band saw, and a celery that is installed in the polisher and comes into contact with the rear end of the saw blade, and the polisher is attached to the base plate. Grinding of a band saw characterized in that the center of gravity is set so as to be pivotally supported on the blade of the band saw and tilted forward of the blade of the band saw, and the celery comes into contact with the rear end of the saw blade of the band saw to prevent its tilting. Device.