JP3580743B2 - Circular saw - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a circular saw that cuts a plurality of rod-shaped works at the same time, and more particularly to a technique for uniformizing the length of a rod-shaped work after cutting and the length of a processed product.
[0002]
[Prior art]
A circular saw machine is a device that cuts a large amount of rod-shaped work quickly and quickly, and a disk-shaped saw blade that rotates at a high speed, a work stopper that locks the tip of a rod-shaped work, and a rod-shaped work that is transferred to a cutting position by a predetermined amount. It is composed of a feeding device (for example, a work pusher) and the like. In general, a circular saw machine cuts a single bar-shaped work (generally, a metal bar such as an aluminum alloy bar or a steel bar) by a predetermined size. In recent years, in order to improve mass productivity, FIG. As shown in (1), there has been proposed a method of simultaneously cutting a plurality of (two in the illustrated example) rod-shaped works 11a and 11b. Further, since the amount of cutting powder at the time of cutting is proportional to the thickness of the saw blade 1, attempts have been made to reduce the thickness of the saw blade 1 in order to improve the yield of the bar-shaped works 11a and 11b. In the drawing, reference numeral 5 indicates a work stopper, and reference numeral 15 indicates a work pusher.
[0003]
[Problems to be solved by the invention]
When cutting the bar-shaped workpieces 11a and 11b, the cut surfaces of the bar-shaped workpieces 11a and 11b are caused by the bending of the saw blade 1 (elastic deformation in the rotation axis direction due to asymmetry of the cutting edge of the cutting edge or cutting resistance). It was inevitable that they would tilt. In particular, this tendency becomes remarkable when the saw blade is made thinner, and when the two bar-shaped workpieces 11a and 11b are cut at the same time, as shown in FIG. A difference δ occurs between Lb, and a difference in length naturally occurs between the rod-shaped works 11a and 11b.
[0004]
The difference in length between the processed products 61a and 61b due to the bending of the saw blade 1 may cause an increase in the number of man-hours and the like in post-processing. For example, when the processed products 61a and 61b are used as a material of an aluminum alloy forged molded product or the like, if there is a difference in length (that is, a difference in volume) between the processed products 61a and 61b, the shorter processed product 61a or 61b is used. It is necessary to set the position of the work stopper 5 according to 61b. However, in such a case, burrs are formed on the mold part of the molded product using the longer processed product 61b, and a large number of work steps and time are required to remove the molded product, and the yield of the material is also reduced. Naturally drops.
[0005]
On the other hand, the difference between the bar-shaped workpieces 11a and 11b is accumulated each time cutting is repeated, so that the long (several m) bar-shaped workpieces 11a and 11b are processed into shorter (eg, about 10 to 20 mm) processed products 61a and 61b. Finally, the difference in length between the two bar-shaped works 11a and 11b exceeds the allowable limit, and as shown in FIG. 14, the work pusher 15 cannot feed one of the bar-shaped works 11b. Problems sometimes occurred.
The present invention has been made in view of the above circumstances, and has as its object to provide a circular saw machine in which the length of a processed product or a bar-shaped work after cutting is made uniform.
[0006]
[Means for Solving the Problems]
Therefore, in order to solve the above problems, in the first invention,
A rotating disk-shaped saw blade,
A work table for placing a plurality of bar-shaped works,
A work stopper for locking the tip of the rod-shaped work,
A work pusher for pressing the rod-shaped work toward the work stopper, and a circular sawing machine for simultaneously cutting the plurality of rod-shaped works by the saw blade,
The work stopper includes locking position adjusting means for adjusting a locking position for each of the plurality of rod-shaped works, and the locking position adjusting means includes at least one movable locking piece abutting on the rod-shaped work. Accordingly, a circular saw having a wedge-shaped member for moving the movable locking piece back and forth is proposed.
In the present invention, for example, after cutting a plurality of rod-shaped workpieces on a test basis, a difference in length between the respective workpieces is measured, and at least one movable contacting the rod-shaped workpiece is performed so as to eliminate the difference. and the locking piece, the adjustment of the locking position by wedges to move the movable locking pieces before and after performing.
Further, in the present invention, by moving the wedge-shaped member forward and backward with respect to the movable locking piece,
The locking position of the bar-shaped work is finely adjusted.
[0008]
In the second invention,
A rotating disk-shaped saw blade,
A work table for placing a plurality of bar-shaped works,
A work stopper for locking the tip of the rod-shaped work,
A work pusher for pressing the rod-shaped work toward the work stopper, wherein the saw blade cuts two rod-shaped works at the same time,
A pressing member that the Wakupussha has a pair of pressing portions abutting on a rear end of the two rod-shaped workpiece for pressing the two rod-shaped workpiece at substantially the same pressure, the substantially central portion of the pressing member swing A circular saw equipped with a pivot that is movably supported is proposed.
According to the present invention, when a difference in length occurs between the two bar-shaped works, the pressing member swings about the pivot to absorb the difference in length, and each bar-shaped work is pushed to the work stopper side by substantially the same pressing force. It will be pressed by pressure.
[0010]
As a desirable mode of the method for cutting a work using the circular saw machine according to the first invention, a rotating disk-shaped saw blade, a work table provided for mounting a plurality of rod-shaped works, A method of cutting a plurality of rod-shaped works using a circular saw having a work stopper for locking a tip of the work and a work pusher for pressing the rod-shaped work toward the work stopper, wherein the rod-shaped work is After adjusting the locking position for each of the plurality of rod-shaped workpieces by the work stopper having at least one movable locking piece that abuts on the workpiece and a wedge-shaped member that moves the movable locking piece back and forth, A method of cutting the plurality of rod-shaped works by a blade is proposed.
In this aspect , for example, after cutting a plurality of rod-shaped workpieces on a test basis, a difference in length between the respective workpieces is measured, and a movable locking piece abutting on the rod-shaped workpiece so that the difference is eliminated. by adjusting the locking position by wedges for moving the movable locking piece back and forth, uniform length of each workpiece is achieved.
[0011]
Further, as a desirable mode of the method for cutting a work using a circular sawing machine according to the second invention, a rotating disk-shaped saw blade, a work table provided for mounting a plurality of rod-shaped works, a workpiece stopper for locking the tip of the workpiece, using a circular saw machine equipped with a Wakupussha for pressing the rod-like workpiece to the workpiece stopper side, a method for cutting the two rod-like workpiece simultaneously, the two A pressure member having a pair of pressing portions for abutting the two rod-shaped workpieces on the rear ends of the two rod-shaped workpieces, and a work pusher provided with a pivot for swingably supporting a substantially central portion of the pressure member. After pressing with the same pressing force, a method of cutting the two bar-shaped works by the saw blade is proposed.
In this aspect, when a difference in length occurs between the two bar-shaped works, the pressing member swings about the pivot to absorb the difference in length, and each bar-shaped work is pushed to the work stopper side by substantially the same pressing force. It will be pressed by pressure.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a circular saw machine to which the present invention is applied will be described with reference to the drawings.
1 is a front view showing the entire configuration of the circular sawing machine, FIG. 2 is a view as viewed in the direction of the arrow A in FIG. 1 (plan view), and FIG. 3 is a view as viewed in the direction of the arrow B in FIG. 1 (side view). FIG. 4 is an enlarged view of the arrow C in FIG. 1 (side view). As shown in these figures, the circular saw machine of the present embodiment includes a circular saw machine body 7 including an electric motor 3 for driving a disc-shaped saw blade 1, a work stopper 5, and the like, and a large number of bar-shaped works 11. And a work supply device 17 including a work pusher 15 for pressing the bar-like work 11 two by two to the work stopper 5 side.
[0013]
The saw blade 1 is driven by an electric motor 3 to rotate at a high speed, while being driven by a saw blade driving mechanism (not shown) and slides in a horizontal direction in FIG. The work stopper 5 slides back and forth in FIGS. 1 and 2 when the operator operates the handle 19. Further, the work pusher 15 is driven by a work pusher driving mechanism (not shown) and slides back and forth in FIGS. 1 and 2 along a rail 20 at the end of the work holding table 13.
[0014]
FIG. 5 is a side view showing the work stopper 5 in the present embodiment, FIG. 6 is a view as seen from an arrow D in FIG. 5, and FIG. 7 is a view as seen from an arrow E in FIG. As shown in these figures, the work stopper 5 includes a base block 21 fixed to a cutting length adjusting mechanism (not shown) and a pair of left and right L-shaped stopper plates 25 fastened to the base block 21 by bolts 23. , 27, a wedge plate 29 serving as a wedge-shaped member and a left holder plate 31 interposed between the base block 21 and the left stopper plate (movable locking piece) 25, and between the base block 21 and the right stopper plate 27. And the right side holder plate 33 interposed therebetween. The lower ends of the stopper plates 25 and 27 are in contact with the front end surfaces of the left and right bar-shaped works 11a and 11b.
[0015]
The contact surfaces of the wedge plate 29 and the left holder plate 31 are inclined with a predetermined gradient (1/100 in the present embodiment), and when the wedge plate 29 is lowered, the left stopper plate 25 is retracted, and the wedge plate 29 is retracted. When the plate 29 rises, the left stopper plate 25 moves forward. Thus, the locking position adjusting means of the present embodiment is constituted by the left stopper plate 25 and the wedge plate 29. The upper end 35 of the wedge plate 29 extends rearward so as to overlap with the left stopper plate 25, and has a central portion through which a bolt 37 screwed into the upper portion of the left stopper plate 25 passes. 39 are drilled. In the drawing, a member indicated by reference numeral 41 is an adjusting nut.
[0016]
FIG. 8 is a plan view showing a main part of the work pusher 15 in the present embodiment, FIG. 9 is a sectional view taken along line FF in FIG. 8, and FIG. 10 is a view taken in the direction of arrow G in FIG. As shown in these figures, a base block 51 is bolted to the front end of the work pusher 15, and a pusher plate 53 and a pusher plate 53 are rocked on the base block 51 as a pressing force equalizing means. A pivot pin 55 for supporting freely is attached. Further, cylindrical pusher pins 57, 59 are welded to the left and right ends of the pusher plate 53, respectively, and these pusher pins 57, 59 are in contact with the rear end surfaces of the left and right rod-shaped workpieces 11a, 11b.
[0017]
Hereinafter, the operation of the present embodiment will be described.
To start the cutting operation, the operator first inserts a small amount of the two bar-shaped works 11a and 11b into the circular saw machine body 7, and cuts and removes the tips of both bar-shaped works 11a and 11b with the saw blade 1. I do. Next, the operator operates the handle 19 to move the work stopper 5 back and forth to obtain a desired cutting length, and then operates the work pusher 15 to feed the bar-shaped works 11a and 11b to the work stopper 5 side. . When the leading ends of the two bar-shaped workpieces 11a and 11b fed in contact with the rear ends of the stopper plates 25 and 27, the operator cuts the bar-shaped workpieces 11a and 11b with the saw blade 1 and cuts the two workpieces 61a. , 61b.
[0018]
Next, the operator measures the difference between the lengths of both the processed products 61a and 61b, loosens the bolt 23, rotates the adjusting nut 41 to move the wedge plate 29 up and down, and moves the left stopper plate 25 To advance and retreat as appropriate. Then, as shown in FIG. 11, when the difference between the lengths La and Lb of both the processed products 61a and 61b falls within the allowable range, the operator tightens the bolts 23 again and attaches the left stopper plate 25 to the base block. Fix to 21. Thereby, the operator can manufacture the processed products 61a and 61b of substantially the same size by automatically operating the circular sawing machine.
[0019]
On the other hand, if there is a difference in length from the beginning on both rod-shaped workpieces 11a and 11b or if the difference in length is accumulated each time cutting is repeated, the pressing force provided on the work pusher 15 is made uniform. The means is activated. That is, as shown in FIG. 12, the pusher plate 53 swings with the pivot pin 55 as a fulcrum, and the two bar-shaped works 11a, 11b are pressed by the pusher pins 57, 59 with the same pressing force.
[0020]
As described above, in the circular saw machine of the present embodiment, even if the saw blade 1 is bent, processed products 61a and 61b having a substantially constant length can be obtained. Is performed, the occurrence of burrs and the like is suppressed. Even if there is a difference in length between the two bar-shaped works 11a and 11b, the bar-shaped works 11a and 11b are pressed against the work stopper 5 with the same pressing force, so that a smooth cutting operation is realized. You.
[0021]
This concludes the description of specific embodiments, but aspects of the present invention are not limited to the above embodiments. For example, in the above-described embodiment, the present invention is applied to a circular sawing machine that cuts two bar-shaped works at a time, but may be applied to a circular sawing machine that cuts three or more bar-shaped works. Further, two or more locking position adjusting means may be provided on the work stopper side, and the structure of the locking position adjusting means may include a screw other than the above-described movable locking piece and the wedge-shaped member. Or a device using a cam may be employed. Further, in the above embodiment, as the pressing force equalizing means, a pressing member and a pivot are exemplified. However, in a circular sawing machine for cutting three or more rod-shaped workpieces, an accumulator and an oil pressure are used. Etc. may be adopted. In addition, the specific configuration of the circular saw machine, the specific shape of each member, and the like can also be appropriately changed without departing from the gist of the present invention.
[0022]
【The invention's effect】
As described above, according to the circular sawing machine according to the present invention, in the case where the locking position adjusting means is provided, it is possible to obtain a processed product having a substantially constant length even if the saw blade is bent. In the case where the pressing force equalizing means is provided, even if there is a difference in length between a plurality of rod-shaped works, these rod-shaped works can be pressed against the work stopper side with the same pressing force, High precision and smooth cutting work is realized.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a circular saw according to the present invention.
FIG. 2 is a view (plan view) as viewed from an arrow A in FIG.
FIG. 3 is an enlarged view (side view) of an arrow B in FIG. 1;
FIG. 4 is an enlarged view (side view) of an arrow C in FIG. 1;
FIG. 5 is a side view showing a work stopper according to the embodiment.
FIG. 6 is a view as seen from an arrow D in FIG. 5;
FIG. 7 is a view as seen from an arrow E in FIG. 5;
FIG. 8 is a plan view showing a main part of the work pusher in the embodiment.
FIG. 9 is a sectional view taken along line FF in FIG. 8;
FIG. 10 is a view on arrow G in FIG. 8;
FIG. 11 is an explanatory view showing the operation of the locking position adjusting means in the embodiment.
FIG. 12 is an explanatory diagram showing the operation of the pressing force equalizing means in the embodiment.
FIG. 13 is a plan view showing a cutting form of two bar-shaped works in a conventional circular saw machine.
FIG. 14 is a plan view showing the operation of a work pusher in a conventional circular saw machine.
[Explanation of symbols]
1 saw blade 3 electric motor 5 work stopper 7 circular saw machine body 11 (11a, 11b) rod-shaped work 13 work holder 15 work pusher 17 work supply device 21 {Base block 23} Bolts 25, 27} Stopper plate 29> Wedge plates 31, 33} Holder plate 51> Base block 53> Pusher plate 55> Pivot pin 57, 59> Pusher pin 61a 61b processed product

Claims (2)

A rotating disk-shaped saw blade,
A work table for placing a plurality of bar-shaped works,
A work stopper for locking the tip of the rod-shaped work,
A work pusher for pressing the bar-shaped work toward the work stopper, and a circular sawing machine for simultaneously cutting the plurality of bar-shaped works by the saw blade,
The work stopper includes locking position adjusting means for adjusting a locking position for each of the plurality of rod-shaped works, and the locking position adjusting means includes at least one movable locking piece abutting on the rod-shaped work. And a wedge-shaped member for moving the movable locking piece back and forth. A rotating disk-shaped saw blade,
A work table for placing a plurality of bar-shaped works,
A work stopper for locking the tip of the rod-shaped work,
A work pusher for pressing the bar-shaped work toward the work stopper, and a circular sawing machine for simultaneously cutting two bar-shaped works by the saw blade,
The work pusher presses the two rod-shaped works with substantially the same pressing force.
A circular sawing machine comprising: a pressing member having a pair of pressing portions abutting on rear ends of the two bar-shaped works; and a pivot for swingably supporting a substantially central portion of the pressing member .

Images