JP2002052419A - Band sawing machine, and metal material cutting method using band sawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lowering of product quality by preventing cutting oil from entering a product gap (gap between square steel pipes) in the case of cutting bound square steel pipes. SOLUTION: A cutting oil spreader 10 for spreading cutting oil on the band sawing cutting edge 1 is provided on a cut-out position (A part) of a circulating band saw cutting edge 1, and an air sprayer (cutting oil removing device) 21 for removing cutting oil adhering to the band sawing cutting edge 1 is provided in a cut-in position (B part) of the band sawing cutting edge 1. In the case of cutting the bound square steel pipes (cut material) 5 formed by binding plural coated square steel pipes (cut material) 5, the bound square steel pipes 5 are cut by the band sawing cutting edge put in the dry state or little quantity of cutting oil adhesion, so that cutting oil can be prevented from entering the gap between the bound products to prevent a coated fil from being separated or discolored by the cutting oil. Soil of the product due to metal chip can be prevented. Even if metal chips are accumulated in the vicinity of the section of the product in cutting, they can be easily removed by compressed air or the like because of dry state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band sawing machine used for cutting, for example, a bundled square steel pipe obtained by binding a plurality of square steel pipes,
Also, the present invention relates to a metal material cutting method using a band saw machine.

[0002]

2. Description of the Related Art A band saw, which performs cutting by swinging an orbiting circular band saw blade, is widely used for cutting a metal material such as a steel material. In this type of band sawing machine, the object to be cut is cut while the cutting oil is continuously sprayed on the band sawing blade. In a conventional band sawing machine, as shown in FIG. The cutting oil is sprayed on the band saw blade 1 on both the entrance side. That is, in the figure, 2 'is a band sawing machine, 3 is a saw main body portion which holds the annular band saw blade 1 so as to be able to rotate and drives it around, and 4 is a receiving table on which an object 5 is mounted (in the illustrated example, FIG. Conveyor roller), 6 is the workpiece 5
Is a band saw blade guide on the cutting out side, and 8 is a band saw blade guide on the cutting in side.
The cutting oil spraying devices 10 and 1 are provided on both the cutting out side (A section) and the cutting out side (B section) of the band saw blade 1 orbiting in the direction.
1 is provided. The cutting oil spraying device 10 on the cutting-out side and the cutting oil spraying device 11 on the cutting-in side are both provided on the band saw blade guides 7 and 8. The illustrated example is a case where a plurality of square steel pipes are cut while being bound. That is, the illustrated workpiece 5 is a united square steel tube obtained by binding a plurality of square steel tubes.

[0003]

By the way, in the above-mentioned band saw machine 2, the cutting oil sprayed on the band saw blade 1 acts to lubricate and cool the band saw blade 1 and the cut surface of the metal material, and the band saw blade 2 1 to prevent overheating and seizure, increase the life of the band saw blade, improve cutting accuracy, and prevent rust on the band saw blade and metal materials. There is a need to spray the cutting oil on both the entry side.

However, for example, as shown in FIG.
Is a bundled square steel pipe obtained by bundling a plurality of square steel pipes (products), and in particular, when the square steel pipe is a painted square steel pipe, there are the following problems. The cutting oil sprayed on the band saw blade 1 at the position immediately before the cutting enters the bound product gap due to the vibration of the product or the capillary phenomenon at the time of cutting the product, and reaches a considerable depth. There is a problem that the coating oil of the product is softened or chemically reacted due to the cutting oil that has entered the product gap, and the coating film is peeled or discolored, thereby deteriorating the product quality. In addition, metal chips are mixed with the cutting oil sprayed on the band saw blade 1 at the time of cutting, but the cutting oil mixed with the metal chips enters the product gap without causing problems of peeling and discoloration of the coating film. However, the product itself is contaminated, and if the metal chips are rusted, the contaminants are further contaminated and the product quality is impaired. Reference numeral 11 in FIG. 4 indicates dirt due to cutting oil or metal chips that have penetrated deep into the product gap from the cutting portion 12. Further, in the case of a plated product, the metal chips attached to the surface rust, and if this progresses, a rust phenomenon occurs and the product itself rusts, which significantly impairs the quality. Therefore, conventionally, the binding of the product (in the illustrated example, the bundled steel pipe 5) is separated and the cutting oil, metal chips, and dust are wiped off from the surface of the product. The operation of wiping the parts is complicated, requires many man-hours, and increases the product cost.

[0005] In addition, since metal chips accumulate in the vicinity of the cut of the product (square steel pipe) during cutting, the metal chips collected in the cut are usually removed so as not to impair the product quality. Since the metal chips in the mouth are not in a dry state and are wet with the cutting oil sprayed on the band saw blade 1, it is not easy to remove the wet metal chips and the workability of removing the metal chips is poor. . Also in this respect, the number of steps is increased and the product cost is increased. This problem is not limited to cutting tied products,
This also occurs in the case of single item cutting.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and is intended to prevent cutting oil from entering a product gap (metallic material gap) when cutting a bound metal material. Provided is a band sawing machine that can prevent a decrease in quality and can easily remove metal chips accumulated in a cutting opening even when not using a bundled metal material, and a metal material cutting method using the band sawing machine. With the goal.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a band sawing machine for cutting a metal material by swinging a circular band saw blade. A cutting oil spraying device for spraying cutting oil to the band saw blade is provided, and a cutting oil removing device for removing cutting oil adhered to the band saw blade is provided at a cutting entry side of the band saw blade.

A second aspect of the present invention is characterized in that the cutting oil removing device in the band sawing machine of the first aspect is an air blowing device that blows compressed air to the band saw blade to blow off the cutting oil.

According to a third aspect of the present invention, there is provided a metal material cutting method using a band sawing machine for cutting a metal material by oscillating an orbiting circular band saw blade. The cutting oil is sprayed, and the cutting oil attached to the band saw blade is removed at a cutting entry side of the band saw blade.

According to a fourth aspect of the present invention, in the metal material cutting method using the band sawing machine according to the third aspect, the object to be cut is a binding metal material obtained by binding a plurality of elongated metal materials.

According to a fifth aspect of the present invention, in the metal material cutting method using the band saw machine according to the third aspect, compressed air is blown to the band saw blade.
The cutting oil adhering to the band saw blade is removed, and the amount of air blown by the air blowing device provided for removing the cutting oil is adjusted to adjust the amount of cutting oil remaining on the band saw blade. And

[0012]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. In FIG. 1, reference numeral 2 denotes a band saw machine according to an embodiment of the present invention. The band saw machine 2 has an annular band saw blade 1 that rotates. The band saw blade 1 is held by the saw main body 3 so as to be twisted around the straight plane at the cut portion so as to be perpendicular to the circling plane, and is circulated by a driving mechanism. 4 is a receiving table (conveyor roller in the illustrated example) on which the workpiece 5 is placed, 6 is a clamp mechanism for clamping the workpiece 5, 7 is a band saw blade guide on the cutting-out side, 8
Is a band saw blade guide on the cut-in side. This embodiment is for cutting a plurality of square steel pipes while binding them, that is,
This is a case where the workpiece 5 is a bound square steel pipe obtained by binding a plurality of square steel pipes.

In the present invention, a cutting oil spraying device 10 is provided at the cutting-out side position (A portion) of the band saw blade 1 orbiting in the direction of the arrow (a) as in the prior art. No equipment is provided. The cutting oil spraying device 1 on the cutting out side
0 is provided in the portion of the band saw blade guide 7 immediately after the cutting-out side as in the conventional case, but it is preferable to spray the cutting oil more abundantly than in the conventional case. The cutting oil spraying device 10 has a configuration in which cutting oil is sent from a cutting oil tank to a cutting oil supply pipe by a pump, and the end of the pipe is simply made to face the band saw blade 1.

A cutting oil removing device 21 for removing the cutting oil adhering to the band saw blade 1 is provided on the cutting entry side. As shown in detail in FIG. 2, the cutting oil removing device 21 according to the embodiment is an air blowing device that blows compressed air to the band saw blade 1 to blow off cutting oil. ) Is provided with a nozzle 22a at the outlet of the valve 22 supplied. As shown in FIG. 3, when the valve 22 is arranged such that the injection direction of the nozzle 22a coincides with the extension of the width of the band saw blade 1 (the vertical direction in FIG. 3),
The air flow is an effective flow for blowing the cutting oil from the surface of the band saw blade 1. The position and angle of the valve 22 may be adjustable so that the direction of the nozzle 22a can be set as such. The cutting oil 2 blown off as shown in FIG. 3 below the band saw blade 1 in the injection direction of the nozzle 22a.
A hopper 24 is provided to collect the hopper 3 so as not to scatter. By collecting the cutting oil blown off from the band saw blade 1 by the hopper 24, it is possible to prevent the cutting oil from being scattered in all directions and applied to the product (square steel pipe). The cutting oil collected by the hopper 24 is returned to a cutting oil tank (not shown) and circulated for use.

A square steel pipe (object to be cut) with the above band sawing machine 2
The work and operation when cutting 5 will be described. First, the bundled steel tube 5 is placed on the receiving table 4, the cutting position in the longitudinal direction is adjusted to the position of the band saw blade 1 of the band sawing machine 2, and then the clamping mechanism 6 is moved. By operating, the steel tube 5 is clamped so as not to move. Next, by operating the operation panel 9 to drive the band saw blade 1 to circulate, and then to swing downward about the swing center O as indicated by an arrow (b), the band saw blade rotates in the direction of the arrow (a). 1 cuts the united angle steel pipe 5. that time,
Cutting oil is sprayed to the band saw blade 1 by the cutting oil spraying device 10, and compressed air is blown to the band saw blade 1 from the air blowing device 21.

The situation at the time of cutting will be described in detail.
The band saw blade 1 generates heat due to frictional resistance with a metal material (square steel pipe) when the band saw blade 1 rotates and cuts the bundled square steel pipe 5, but is sprayed by the cutting oil spraying device 10 at a position immediately after the cut-out side. Cooled with cutting oil. It is preferable to spray the cutting oil on the cutting-out side more abundantly than before. Band saw blade 1 on cutting side
Is slightly left on the surface of the band saw blade 1 until that part of the band saw blade 1 goes around and comes to the cut-in side. On the cutting entrance side of the band saw blade 1, compressed air is supplied from a nozzle 22 a of an air blowing device (cutting oil removing device) 21 to the band saw blade 1.
As shown in FIG. 3, the cutting oil still remaining on the band saw blade 1 is blown off by the compressed air. In this case, if the blowing of the compressed air is sufficiently strong, the dry state is such that the oil film remains on the surface of the band saw blade 1. When the bundled square steel pipe 5 is cut by the band saw blade 1 in the dry state, there is no flowing cutting oil, so that the cutting oil does not enter the bound product gap (gap between the square steel pipes). Therefore, there is no problem that the coating film is peeled off or discolored due to the cutting oil that has entered the product gap, thereby deteriorating the product quality. In addition, since the metal chips do not mix with the cutting oil and enter the product gap, the metal chips do not stain the product. In addition, the metal chips do not rust and are not further stained. Further, in the case of a plated product, the product itself does not rust due to the rust phenomenon caused by metal chips that have penetrated into the product gap, and the quality is not significantly impaired. Therefore, it is not necessary to perform the complicated work of separating the bundling of the products (the bundling angle steel pipes 5) one by one and wiping the cutting oil, metal chips, and dust as in the related art, thereby reducing man-hours and reducing the product cost. .

Further, when cutting, metal chips are used as products (square steel pipes).
The metal chips in this cut are not wet with the cutting oil and are in a dry state, so they can be easily removed with compressed air, reducing the number of man-hours and reducing product cost. Can be achieved. This effect is effective not only when cutting a united product but also when cutting a single product.

The cutting function is impaired by not spraying the cutting oil on the cut-in side of the band saw blade 1, that is, the cutting oil is not abundantly present as a liquid layer on the surface of the band saw blade 1 during cutting. As to whether or not
From many achievements adopted in actual production sites, it has been found that there is no problem with a metal material having a hardness at least as high as a rolled steel material for general structures. To explain a little about this, even if compressed air is blown to the band saw blade 1 by the air blowing device 21 to blow off the cutting oil, the cutting oil does not completely disappear from the surface of the band saw blade 1 but lubrication in the cutting oil does not occur. A part of the oil such as the agent remains as an oil film adhered to the surface of the band saw blade 1, so that a certain lubricating action can be obtained with this oil film, and the frictional resistance is still reduced to suppress heat generation, and the band saw blade 1 is burned. Can be prevented. As for the cooling of the band saw blade 1, the band saw blade 1 can be sufficiently cooled by sufficiently spraying the cutting oil to the band saw blade 1 on the cutting out side (preferably more widely than before). . Further, since the compressed air blown to the band saw blade 1 by the air blowing device 21 has an air cooling function, the problem of insufficient cooling of the band saw blade 1 can be avoided in this respect as well. Therefore, with respect to both the lubrication and cooling functions, which are the functions of the cutting oil, the functions necessary for maintaining the cutting function can be obtained. Further, the metal chips clogged in the band saw blade 1 can be blown off by the compressed air blown to the band saw blade 1.
Can be prevented from clogging, and in this regard, a necessary cutting function can be secured.

Although not shown, if the wire brush is rubbed against the teeth of the band saw blade 1 at an appropriate orbital position on the cutting entry side of the band saw blade 1 to prevent clogging, the band saw blade 1 It is more effective for increasing the life of the device, securing a cutting function, and the like.

When the cutting oil is blown off from the band saw blade 1 with the compressed air, the opening degree of the valve 22 of the air blowing device 21 is adjusted, and the amount of air jet from the nozzle 22a is adjusted.
The amount of cutting oil blown off can be adjusted, and the amount of cutting oil remaining on the surface of the band saw blade 1 can be adjusted. Therefore, depending on the material, shape, size, plate thickness, etc. of the object to be cut, the surface of the band saw blade 1 is not limited to the case where the surface of the band saw blade 1 is in a dry state (a state in which the oil film exists). The cutting may be performed under an optimal cutting condition so that a wet state (wet state) or a state in which the liquid layer slightly remains is formed.

When the object to be cut is a steel tube with a bundled angle, the cutting oil easily penetrates into the product gap and also penetrates into the inner part of the tube.
Cutting with the band saw machine of the present invention is extremely effective.
However, the band saw machine of the present invention can be applied not only to cutting a bundled square steel pipe but also to cutting a single square steel pipe. It can also be used to cut round steel pipes or single products, and can also be used to cut shaped steel or other steel materials or single products. Or it can be used for cutting single items. In addition, the present invention is particularly advantageous when the object to be cut is a painted product, but is also effective in the case of a plated product, and can be naturally applied to a mere black scale product without painting or plating. It is. In addition, as for the spraying position of the cutting oil by the cutting oil spraying device 10, the position immediately after the cutting out side of the band saw blade 1 is appropriate,
The distance may be slightly away as long as it does not hinder the cooling of the band saw blade 1. Also, a cutting oil removing device 2 provided on the cutting entry side
1 is provided in the linear portion of the band saw blade 1 as in the embodiment, which is appropriate in terms of ease of cutting oil removal, ease of collection, and other various points, but is not necessarily a linear portion. You may. After the cutting oil has been sprayed on the cutting-out side, the band saw blade 1 can be provided at an appropriate orbital position. The cutting oil removing device is most suitably an air blowing device as in the embodiment, but is not necessarily limited to this. For example, the above-described wire brush can be used as a cutting oil removing device. In short, any wire brush that can remove at least a part of the cutting oil attached to the band saw blade 1 may be used. The cutting oil to be used is arbitrary, and a general cutting oil usually used for a band saw machine can be used. Further, the structure of the band saw machine itself is not particularly limited, and is applicable to band saw machines having various structures as long as it is a band saw machine of a type in which a rotating annular band saw blade is swung to cut a metal material. it can.

[0022]

According to the band sawing machine or the metal material cutting method using the band sawing machine according to the present invention, the cutting oil is sprayed on the band sawing blade at the cutting out side position of the band sawing blade, and at the cutting entering side position of the band sawing blade, Since the cutting oil attached to the band saw blade is removed, the following effects are obtained. On the cutting entrance side of the band saw blade, the cutting oil on the surface of the band saw blade is blown off by compressed air or the like, and the object to be cut is cut by the band saw blade in a dry state or a state with a small amount of cutting oil attached.
For example, when the object to be cut is a bundled square steel pipe or the like, it is possible to prevent cutting oil from entering the bound product gap (gap between the square steel pipes), and therefore, paint is applied for the cutting oil that has entered the product gap. Deterioration of the product quality due to peeling or discoloration of the coating can be prevented. Since the metal chips do not mix with the cutting oil and penetrate into the product gap, the metal chips do not stain the product.
In addition, the metal chips do not rust and are not further stained. Also, in the case of plated products, the product itself rusts due to the rust phenomenon caused by metal chips entering the product gap,
There is no significant loss of quality. Therefore, as in the past, the unity of the products is separated, and cutting oil, metal chips,
Complicated work of wiping dust is not required, which reduces man-hours and product cost.

Also, even if metal chips accumulate in the vicinity of the cut of the product during cutting, the metal chips at the cut are not wet with the cutting oil and are in a dry state, so that they can be easily removed with compressed air or the like. It is possible to reduce the product cost with a small number of man-hours. This effect is effective not only when cutting a united product but also when cutting a single product.

[Brief description of the drawings]

FIG. 1 is a front view of a band saw machine according to an embodiment of the present invention.

FIG. 2 is a detailed enlarged view of the vicinity of a cutting oil removing device in the band sawing machine of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line AA of a main part of FIG. 2;

FIG. 4 is a view for explaining a problem when a bundled square steel pipe is cut by a conventional band saw machine, and is a view showing a state in which cutting oil enters a product gap.

FIG. 5 is a front view of a conventional band saw machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band saw blade 2 Band saw machine (band saw) 3 Saw main body 4 Cradle 5 Workpiece to be cut (bundled square steel pipe) 6 Clamp mechanism 7 Band saw blade guide on cutting out side 8 Band saw blade guide on cutting in side 9 Operation panel 10 Cutting out Side cutting oil spraying device 21 cutting oil removing device (air spraying device) 22 valve 22a nozzle 23 hopper

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3C040 AA16 BB12 CC14 DD17 GG01 GG06 GG12 HH11 JJ05

Claims (5)

[Claims] 1. A band sawing machine for cutting a metal material by swinging an orbiting annular band saw blade, a cutting oil spraying device for spraying a cutting oil to the band saw blade at a cutting-out side position of the orbiting band saw blade. A band sawing machine provided with a cutting oil removing device for removing cutting oil attached to the band saw blade at a cutting entry side of the band saw blade. 2. The band saw machine according to claim 1, wherein said cutting oil removing device is an air blowing device for blowing compressed air to a band saw blade to blow off cutting oil. 3. A metal material cutting method using a band sawing machine for cutting a metal material by swinging an orbiting circular band saw blade, wherein a cutting oil is sprayed on the band saw blade at a cutting-out side position of the orbiting band saw blade. A metal cutting method using a band sawing machine, wherein cutting oil attached to the band sawing blade is removed at a cutting entry side of the band sawing blade. 4. The metal material cutting method according to claim 3, wherein the object to be cut is a bound metal material obtained by bundling a plurality of elongated metal materials. 5. A band saw, wherein compressed air is blown onto the band saw blade to remove cutting oil attached to the band saw blade, and the amount of air blown by an air blowing device provided for cutting oil removal is adjusted. The metal material cutting method using a band saw machine according to claim 3, wherein the amount of the cutting oil remaining on the blade is adjusted.