JPH05208311A - Sawing machine - Google Patents

Abstract

PURPOSE:To prevent the increase of a slip caused by catching chips between a belt and a motive wheel and increase the transmission efficiency of a drive torque and reduce an energy loss by arranging a scraper for removing chips adhered on a saw blade belt between a work to be processed and the power wheel. CONSTITUTION:The drive of motors 4, 5 is controlled by setting a value corresponding to the material quality, dimension and the like of a work 9 to be processed which is going to be cut by a drive power and a moving speed. A table 10 is moved in relation to a saw blade formed on the side end of a saw blade belt 1 between the pulleys 2, 3 driven by this motors 4, 5. The work 9 to be processed is cut after contacting the work 9 to be processed on the table 10 to the saw blade. During this cutting, the chips adhered to the saw blade belt 1 between the work 9 to be processed and the pulleys 2, 3 are removed by the scrapers 7, 8 installed on the rotary shafts 21, 31 of the pulleys 2, 3. Thereby, the increase of the slip caused by catching chips between this saw blade belt 11 and the pulleys 2, 3 is prevented.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to improvements in saw machines.

[0002]

2. Description of the Related Art Conventionally, a saw machine using an endless belt-shaped saw blade is constructed such that a saw blade belt is hung between a power train and a pulley, and a motor is driven by a motor under a required tension. Has been done. Since a driving force is normally applied between the belt and the power train while slippage occurs, there is a drawback that the loss is large and the power of the driving source is increased. Also, 1-
There was a drawback that an unpleasant sound such as "keen" was generated by a 2 KHz stick-slip. Such slips increase when cutting chips adhere to the rotating saw blade belt and can even generate heat due to slip friction leading to belt breakage.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks of the prior art and to enable stable and efficient cutting by a stable power transmission rotary drive with less slippage. To do.

[0004]

In a saw machine using an endless belt-shaped saw blade, a saw blade belt between a work piece machined by the saw blade and a motor vehicle removes adhered chips. It is characterized by being provided with a scraper. Further, the motor vehicle is characterized by being formed with unevenness for removing chips.

[0005]

As described above, according to the present invention, since the scraper for removing the chips adhering to the saw blade belt between the work to be processed by the saw blade and the power train as described above is provided, the chips are caught between the belt and the power train. Thus, the disadvantage of increasing slip can be prevented. Also, this is because even if the unevenness is formed on the power vehicle, the chips attached to the belt fall into the recess formed on the power vehicle, and the chips are prevented from intervening in the power transmission surface between the convex portion of the power vehicle and the belt. It is possible to prevent, and also slip can be prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. FIG. 1 is a top view of a saw machine, in which reference numeral 1 is an endless belt-shaped saw blade, which is stretched between two pulleys 2 and 3 to apply a predetermined tension. Reference numerals 4 and 5 denote rotary motors that actuate a driving force using both pulleys 2 and 3 as a power vehicle, and rotate the motors in synchronism with each other, and the rotational drive drives the belt 1 endlessly as indicated by arrows. Numerals 7 and 8 are a pair of scrapers each having a knife-shaped pointed tip in contact with the inner side surface of the belt 1 which rotates and moves, and its base portion is a rotating shaft 2 of a motor vehicle.
It is attached to 1, 31 with slip rings 22, 32. 6
Is a hydraulic cylinder that applies a required tension to the belt 1 between the pulleys 2 and 3, and 9 is a workpiece to be cut,
Cutting metal, wood, synthetic resin, etc. Reference numeral 10 is a processing table for mounting and fixing a workpiece.

In the above, while the required tension is applied to the belt 1 between the pulleys 2 and 3 by the control of the cylinder 6, the rotation driving force is generated by driving the motors 4 and 5 using the pulleys 2 and 3 as a power vehicle. give. The drive power and the moving speed are set to values corresponding to the material and size of the material 9 to be cut, and the drive control of the motors 4 and 5 is performed. The table 10 is moved to the saw blade formed at the side end of the rotary belt to bring the workpiece 9 into contact with it for cutting. By transmitting the rotational driving force from both to the saw blade belt 1 by using the pulleys 2 and 3 as a power vehicle by the synchronously rotating motors 4 and 5,
The transmission drive torque can be remarkably increased as compared with the case of using a single power vehicle, and slip loss and the like are reduced, so that the power of the drive source can also be reduced. For example, when wood is cut with a saw machine in which a saw blade having a blade pitch of 25 mm is stretched between pulleys having a diameter of 1.05 m and a gap of 2.3 m, the cutting depth is 3 mm and the cutting speed is 7 m.
At the time of cutting a log of 2 m at / min, the driving power of the pulley was about 800 W on one side and the total power was 1.6 KW. During the cutting process, the scrapers 7 and 8 were brought into contact with the abdominal surface of the saw blade belt 1 to bring them into contact with the pulleys 2 and 3 while removing the adherence of chips and the like. Power transmission enabled efficient rotation.

The horsepower HP transmitted between the motor vehicle and the belt is Therefore, when a predetermined tension is applied by the cylinder 6 and the rotation speed is set to a predetermined value, the transmission horsepower is controlled in proportion to the friction coefficient. Therefore, the only way to increase the transmission horsepower is to increase the friction coefficient, but normally FC
Coefficient of friction when using a pulley of material μ = 0.1 to 0.
It is about 2, but this is μ <0.0 due to the adhesion of chips.
When it reaches about 5, the transmission horsepower becomes less than 1/2.
The scrapers 7 and 8 have their bases attached to the rotary shafts of the pulleys by slip rings 22 and 23, respectively, so that the rotation of the pulleys 2 and 3 imparts a rotational force due to slip friction to the belt 1 that rotates and moves at its tip. With this, the chips attached to the belt 1 can be eliminated. This makes the pulleys 2, 3
Intervention of chips can be blocked in the meantime, a reduction in the friction coefficient can be prevented, and stable rotational driving force transmission efficiency can be improved. The chips removed by the scraper may be removed by blowing air from the nozzle, for example.

FIG. 2 shows another embodiment of the scraper.
And 12 are rotary brush scrapers, and 13 and 14 are motors for rotating the brushes 11 and 12, respectively.
The rotation direction of 12 is rotated so as to be opposite to the movement direction of the belt 1, and the adhered chips are removed by brush friction.

FIG. 3 shows an embodiment in which unevenness 2a is formed on the contact surface of the surface of the pulley 2 of the motor vehicle with the belt 1. The size of the unevenness needs to form a recess having a size such that the cutting tip with the saw blade does not enter the gap between the belt 1 and the contact portion between the protrusion and the belt 1.

[0011]

As described above, according to the present invention, since the scraper for removing the chips adhering to the saw blade belt between the workpiece machined by the saw blade and the power train is provided, the chips are caught between the belt and the power train. It is possible to prevent the drawback of increasing the slip, increase the transmission efficiency of the driving torque, transmit high torque without energy loss, and perform cutting at high speed and high efficiency. Also, by forming the unevenness on the power vehicle, it is possible to prevent the chips adhering to the belt from falling into the recess formed on the power vehicle and interposing the chips on the power transmission surface between the convex portion of the power vehicle and the belt,
It is possible to prevent slippage and improve power transmission efficiency.

[Brief description of drawings]

FIG. 1 is a structural diagram of an embodiment of the present invention.

FIG. 2 is a structural diagram of another embodiment of the present invention.

FIG. 3 is a partial structural diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Saw blade belt 2,3 Pulley 4,5 Motor 6 Hydraulic cylinder 7,8 Scraper 9 Workpiece 10 Support stand

Claims (2)

[Claims] 1. A saw blade between an endless belt-shaped saw blade extending between a pulley and a power train, or between the power train and driven to rotate. A saw blade between a work to be processed by the saw blade and the power train. A saw machine provided with a scraper for removing chips attached to the belt. 2. A saw machine, in which an endless belt-shaped saw blade is stretched between a pulley and a power train or between power trains for rotational driving, wherein the power train is provided with irregularities for removing chips. ..