JPH0432170Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device that cools a template used when cutting a band saw for sawing lumber to prevent harmful effects caused by overheating.

BACKGROUND TECHNOLOGY Conventionally, in a band saw blade device, prior to welding stellite, the band saw is held under pressure from both sides so as to maintain a predetermined build-up space between the teeth of the band saw, and A device equipped with a clamping pressure holding member that releases the clamping pressure after Stellite welding is disclosed in JP-A-59-
It is known from the publication No. 191571.

Problems to be Solved by the Invention The conventional cutting device described above does not have cooling means for the mold plate, so if the cutting operation continues,
The template absorbs the heat of the heating means and the cutting edge material and gradually becomes high temperature, reaching a state of overheating that exceeds the optimum temperature of the cutting blade, which not only tends to cause pinholes in the cutting blade, but also causes burnout due to overheating of the saw blade. The area where the saw blade is expanded increases the area of annealing, and when the overheating reaches the bottom of the tooth, the effect of heat tension may occur and cause the saw blade to go out of order.Moreover, the copper template
There was a problem that if it became overheated, it would be damaged in a short period of time.

The present invention was made to solve the above-mentioned problems. By forcing the mold plate holder to cool down, the mold plate is always kept at the appropriate temperature for the blade, and no defects occur due to overheating. The object of the present invention is to provide a device in which cutting is performed.

Means for Solving the Problems The mold cooling device in the blade device for a band saw according to the present invention, as shown in the embodiments shown in FIGS. a pair of templates 14 that are opened by the operating means 21, 21 and closed after the saw has finished feeding, sandwiching the band saw 3 and forming a molding recess of a desired blade shape in the blade section a' of the band saw 3;
14, a holder that supports these mold plates 14, 14 and has refrigerant chambers 18, 18 therein, and cools the mold plates 14, 14 by circulating a refrigerant through the refrigerant chambers 18, 18. Piping 19, 20 and 1 to be done
9 and 20.

Function When using the device configured as described above to cut the band saw 3, a refrigerant such as water is supplied to the refrigerant chambers 18, 18 of the holders 17, 17 through the pipes 19, 20 and 19, 20. is passed through the holding bodies 17, 17.
When the band saw 3 is cut by the templates 14, 14 supported by the templates 14, 14, the heating means 48 and the templates 14,
The refrigerant passing through the refrigerant chambers 18, 18 in the holders 17, 17 absorbs the heat transferred to the holders 17, 17 and carries it away, and the mold plates 14, 14 do not rise above the temperature suitable for the blade. , 14 is carried out at an appropriate temperature, and there is no occurrence of pinholes due to overheating or poor fusion of the mixed materials due to insufficient temperature, and the blade is attached under the best conditions. The heating range is limited to the area necessary for the attached blade, so there is no increase in the annealing range due to expansion of the range, and there is no possibility of the saw blade becoming distorted due to the heat tension effect due to heating up to the tooth bottom. It is.

Embodiment An example of implementation of a mold cooling device in a band saw blade device according to the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4 of the drawings, reference numeral 1 denotes a frame, in the center of which a sawing path 2 is vertically arranged as shown in FIG. A band saw 3 having a blade part a' formed on the tooth throat side is supported so that the tooth throat side faces upward, and is vertically fed from above to below.

4 is a feeder for the band saw 3 described above, and as shown in FIGS. 4 and 5, a push pin 5 that engages with the saw teeth a is provided at the tip, and the base is attached to the frame 1 with a shaft 6 so that it can freely swing up and down. This feeder 4 is connected by a rod 9 to the middle of a lever 8 whose base is fixed to a lever shaft 7 disposed below it as shown in FIG.
The tip of the lever 8 is engaged with a cam 11 fixed to a camshaft 10, and the rotation of the cam 11 is transmitted to the feeder 4 by the lever 8 and the rod 9, and each rotation of the cam 11 moves the band saw 3 to the saw tooth 1. This feeder is fed intermittently one by one, and this feeder 4 is attached to the blade part.
In order to press the blade material welded to a′, which will be described later, into the molding recess of the mold plate, as shown in FIG. The above-mentioned cam 11 is provided with an operating section 13 for pressurizing the feeder 4, which has been returned part way after sending the saw, so that the presser piece 12 is pressed against a melting blade material to be described later.

Reference numerals 14 and 14 denote a pair of templates for regulating the blade shape of the attached blade, and as shown in FIG.
The levers 16, 16 are attached to the upper ends of the blades 6, 16 by holders 17, 17, and when the levers 16, 16 are rotated inward, the part of the band saw 3 to be cut is clamped from both sides as shown in FIG. 16, 16 separate from the band saw 3 when they rotate outward, and in the portion of the band saw 3 corresponding to the attached blade part a' of the saw tooth a, there are recesses b, b for aligning the position and shape of the attached blade. It has been formed.

Reference numerals 18 and 18 are refrigerant chambers provided in the above-mentioned holders 17 and 17, and pipes 19, 20 and 1 are installed inside the refrigerant chambers.
9 and 20 circulate a coolant such as water to cool the mold plates 14 and 14.

Note that the piping 19, 20 described above will be omitted in subsequent drawings.

Reference numerals 21 and 21 denote operating levers for the mold plates 14 and 14, respectively, which extend outward from the lower portions of the levers 16 and 16 as shown in FIG. 7, the levers 22, 22 are connected at their intermediate ends by rods 23, 23, and the other ends of the levers 22, 22 are engaged with cams 24, 24, which are fixed to the camshaft 10.
The rotation of the cams 24, 24 is transmitted to the operating levers 21, 21 by the levers 22, 22 and rods 23, 23, and the mold plates 14, 1 are rotated every rotation of the cams 24, 24.
4 opening and closing.

Reference numerals 25 and 25 indicate groove wheels for supplying a bladed material 26 such as stellite, and as shown in FIG. , the rotation of the pulse motor 29 attached to the groove wheels 25, 25 on the back side of the base plate 27 as shown in FIGS. The signal is transmitted to the groove wheels 25, 25 through the band saw 3, and these are rotated in the opposite direction at a constant speed to feed out the cutting edge material 26 by the cutting amount at one time.The cutting amount changes depending on the gauge thickness of the band saw 3, etc. The rotation angle of the pulse motor 29 is adjusted to cope with the increase or decrease in the number.

32 is a groove wheel 25 for supplying the above-mentioned bladed material 26;
25 is a reciprocating table that alternately positions the band saw 3 in a blade attachment position and a standby position on the side thereof, and is attached to a pair of horizontal guides 33, 33 attached to the frame 1 described above as shown in FIG. movably engaged,
The board 27 is rotatably mounted on a shaft 34, and the frame 1 is attached to the carriage 32 and its lower part.
One end of a bell crank 36 attached to a shaft 35 is connected by a rod 37, and the intermediate portion is fixed to the other end of the bell crank 36 and the lever shaft 7 passing below it as shown in FIG. 8 of the drawings. 38 is connected to one end of the lever 38 by a rod 39.
The other end is engaged with the cam 40 fixed to the camshaft 10 described above, and the rotation of the cam 40 is controlled by the lever 38.
is transmitted to the bell crank 36 by the rod 39, and one revolution of the cam 40 causes the carriage 32 to reciprocate once.

Reference numeral 41 denotes a lever for pressing and releasing the blade member 26 from the blade part a' of the sawtooth a, and is fixed to a shaft 34 attached to the carriage 32 described above, and this lever 41 is shown in FIG. A long hole 42 is formed as shown in the figure, and a rod 43 is inserted into the long hole 42 as shown in the figure.
A pin 44 attached to the upper end is engaged, and the lower end of the rod 43 is connected to the middle of a lever 45 whose base is fixed to the lever shaft 7 passing under the rod 43 as shown in FIG. Camshaft 1 described above
0, the rotation of the cam 46 is transmitted to the lever 41 by the lever 45 and the rod 43, and one rotation of the cam 46 tilts the board 27 at the blade position toward the blade part a' side. After the blade is attached, the rod 43 is tilted in the opposite direction to return to the standby position.The upper end of the rod 43 is pulled forward of the lever 41 by a spring 47 as shown in FIG.
It is designed to work reliably.

48 is the blade member 26 at the blade position described above.
This is a discharger that heats the sawtooth a and the sawtooth a to a melting temperature.The discharger is supported by a holder 49 as shown in Fig. 1, and is alternately positioned in the blade position and a standby position on the side thereof by a reciprocating means to be described later. be done.

Reference numeral 50 denotes a carriage for reciprocating the discharger 48 between the blade attachment position and the standby position on the side, and is mounted on the frame 1 so as to face the horizontal guides 33, 33, as shown in FIG. A bell crank is movably engaged with the horizontal guides 51, 51 and rotatably supports a spindle 52 of the torch holder 49, and a bell crank is supported on the frame 1 by a shaft 53 at the lower portion of the carriage 50. 54 is connected to one end of the bell crank 5 by a rod 55.
4, and a lever 56 whose intermediate portion is fixed to the lever shaft 7 passing below it as shown in FIG. 10 of the drawing.
One end of the lever 56 is connected to the bell crank 54 by a rod 57, and the other end of the lever 56 is engaged with a cam 58 fixed to the camshaft 10. The rotation of the cam 58 causes the carriage 50 to reciprocate.

Reference numeral 59 denotes a lever for rotating the discharger 48, which is fixed to a support shaft 52 on which the holder 49 is attached to a carriage 50, and a long hole 60 is formed in this lever 59 as shown in FIG. 11 of the drawings. The long hole 60
As shown in the figure, a pin 62 attached to the upper end of the rod 61 is engaged, and the lower end of the rod 61 is connected to the first
As shown in Figure 1, the lever 63 is connected to the lever 63 whose base is fixed to the lever shaft 7 passing below the
3 is engaged with the cam 64 fixed to the camshaft 10 described above, and the rotation of the cam 64 is controlled by the lever 63.
is transmitted to the lever 59 by the rod 61, and the cam 6
With one rotation of 4, the holder 49 of the discharger 48 is swung downward before it leaves the blade position, returns to the standby position, and then returns to face the blade position. .

Reference numeral 65 denotes a motor that drives the camshaft 10 described above, which is connected to the camshaft 10 through a belt hook 66 as shown in FIG.
46, 58, and 64 are rotated in synchronization.

67 is a groove wheel 2 that supplies the above-mentioned blade material 26.
5, 25, which corresponds to the operating cam 68 attached to the camshaft 10 as shown in FIG. 4, and when operated by the operating cam 68, starts the pulse motor 2.
9 is rotated, and the blade member 2 is attached by the groove wheels 25, 25.
This is combined with a controller (not shown) that stops the rotation of the pulse motor 29 when the pulse motor 6 is fed out.

In the apparatus shown in the above embodiment, the mold plate 1
Refrigerant chamber 1 provided in holders 17, 17 of 4, 14
Send tap water to 8, 18 through piping 19, 19,
This water was discharged into the sewer or the like through the pipes 20, 20, and the band saw 3 was cut using the mold plates 14, 14. As a result, the water passing through the coolant chambers 18, 18 carries away the heat transferred from the discharger 48 and the welded blades to the mold plates 14, 14, so that the mold plates 14, 14 are in an overheated state. The temperature is maintained at a temperature suitable for welding stellite as a cutting edge material, and there are no defects such as pinholes or poor fusion of mixed materials on the cutting edge part a' of the band saw 3, and the mold plate 14, By applying the blades within 14, it was possible to create blades that were well aligned in amount, position, and shape.

Effects of the invention The device related to the present invention cools the mold plate by circulating a refrigerant through the holder of the mold plate, and maintains the mold plate at the appropriate temperature for the blade, making it possible to apply the blade under optimal conditions.
It was possible to stably attach the blade without defects such as pinholes or poor material fusion.

Since the heating range of the sawtooth is kept within the required range by cooling, the annealing range is narrowed and the heating does not reach the tooth bottom, so annealing is easily performed and the tension effect works. It doesn't make the blade go crazy.

Cooling keeps the mold plate at a low temperature and does not cause thermal damage, making it durable.

It has the following unique effects.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of implementation of a device related to the present invention. Figure 2 is a side view of one of the above as seen from the inside. FIG. 3 is a front view of a band saw blade device employing the same device. Figure 4 is a side view of the same as above. FIG. 5 is a side view showing the saw feeding means and its drive system in the same as above. FIG. 6 is a side view showing the opening/closing means of the mold plate and its drive system. FIG. 7 is a side view showing the feeding means for the bladed material. FIG. 8 is a side view showing the means for reciprocating the bladed material supply means and its drive system. FIG. 9 is a side view showing the means for rotating the bladed material supply means and its drive system. FIG. 10 is a side view showing means for reciprocating the heating means and its drive system. FIG. 11 is a side view showing means for rotating the heating means and its drive system. FIG. 12 is a plan view of the mold plate. 13th
The figure is a side view of the bladed material being held down by the holding piece. In the figure, 3 is a band saw, 4 is a saw feeding means, 14, 14 is a molding plate with a blade, 17, 17 is a holder, 18, 1
8 is the refrigerant chamber, 19, 20 and 19, 20 are the pipes, 2
1 and 21 are operating means.

Claims (1)

[Scope of utility model registration request] It is attached to a pair of holders, and when the saw is being fed, it is opened by the operating means and separated from the band saw, and when the saw has finished feeding, it is closed by the operating means to sandwich the band saw, and blade forming recesses are formed on both sides of the attached blade part. A band saw blade comprising: a pair of templates; and a refrigerant chamber provided in the holding body close to the templates and through which a refrigerant flows through piping to cool the templates. Mold cooling device in equipment.