Band saw and method for cutting workpiece with band saw

Abstract

To provide a band saw machine capable of performing cutting processing at high speed by a semi-dry method.SOLUTION: A band saw machine (91) includes: a first wheel (31) that applies tension to a band saw blade (5) to properly tracking and a second wheel (32) located below the first wheel (31); a first supply part (71) that is arranged between a lower most end (P6) of the second wheel (32) traveling from the second wheel (32) to the first wheel (31) to a workpiece cutting position (P1) in a rotation travel path of the band saw blade (5), and injects cutting liquid (L) that has been made to be mist (L1) to a tooth part (5b) of the band saw blade (5) or drips cutting liquid (L); and a second supply unit (72) that is arranged between the workpiece cutting position (P1) to the second wheel (32), and pours cutting liquid (L) or cooling fluid on the band saw blade (5) or jets cutting liquid (L) or cooling fluid to the band saw blade (5).SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a band saw. board coverage This invention relates to a method for cutting a workpiece using a band saw. [Background technology]

[0002] Known methods of supplying cutting oil in cutting processing include a wet method in which cutting oil is abundantly supplied to the cutting tool, and an MQL (Minimum Quantity Lubrication) method in which cutting oil is supplied to the cutting tool in mist form to minimize the amount of oil used, as described in Patent Document 1. The MQL method is also called the semi-dry method or mist method. Patent Document 2 describes a cutting device that performs cutting using a band saw blade in a semi-dry manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-025384 A [Patent Document 2] JP 2004-283938 A Summary of the Invention [Problem to be solved by the invention]

[0004] The semi-dry method uses very little cutting oil, so products with almost no cutting oil can be obtained during cutting with a band saw blade. This reduces the amount of post-processing work required, such as cleaning the product, and allows the working environment for handling the product to be maintained in a good condition with little oil contamination. On the other hand, the cutting oil supplied to the band saw blade during cutting serves as a lubricant for cutting as well as a coolant for cooling the material to be cut and the band saw blade. The semi-dry method uses less cutting oil as a coolant than the wet method, so the cooling efficiency is lower than that of the wet method. Therefore, when cutting with the semi-dry method, the cutting speed needs to be suppressed so that the band saw blade does not become too hot and its life is not shortened. Therefore, in the case of cutting with the semi-dry method, it is desired to improve the processing efficiency by enabling cutting at a higher speed.

[0005] Therefore, the problem to be solved by the present invention is to provide a band saw capable of performing high-speed cutting processing using a semi-dry method. board coverage The present invention provides a method for cutting a workpiece using a band saw. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration and procedure. 1) The workpiece is cut using the semi-dry method. A first wheel that applies tension to the band saw blade to ensure proper tracking, and a second wheel that is disposed below the first wheel; From the bottom end of the second wheel traveling from the second wheel to the first wheel in the rotational traveling path of the band saw blade The above Work of a first supply unit that is disposed between the cutting position and the cutting fluid supplying unit and that sprays a mist of cutting fluid onto the teeth of the band saw blade; The workpiece of A second supply unit is disposed between the cutting position and the second wheel, and supplies or sprays cutting fluid or a cooling fluid to the band saw blade; a removal section provided in a section of the rotational path of the band saw blade from the contact end of the second wheel to the contact start of the first wheel, and between the contact end of the second wheel and the first supply section, for removing deposits attached to the band saw blade and the cutting fluid or the cooling fluid; Equipped with The removal unit removes the deposits and the cutting fluid or the cooling fluid by sliding a scraper relative to the surface of the traveling band saw blade, The installation position of the removal unit is set so that the traveling band saw blade reaches the first supply unit in a dry state. It is a band saw. 。 2 2. A method for cutting a workpiece using a band saw, comprising: applying tension to a band saw blade to ensure proper tracking; cutting the workpiece in a semi-dry manner using a band saw having a first wheel and a second wheel disposed below the first wheel; In a first supply section between the lowermost end of the second wheel traveling from the second wheel toward the first wheel in the rotational travel path of the band saw blade and a workpiece cutting position, the cutting fluid is sprayed or dropped onto the teeth of the band saw blade to cool the band saw blade; In a second supply section between the workpiece cutting position and the second wheel, a cutting fluid or a cooling fluid is poured or sprayed onto the band saw blade to cool the band saw blade; A scraper is provided in a section from the contact end of the second wheel to the contact start of the first wheel and from the contact end of the second wheel to the first supply section, and the scraper removes the deposits attached to the band saw blade. and the cutting fluid or the cooling fluid. Remove The scraper is positioned so that the traveling band saw blade reaches the first supply section in a dry state. This is a method of cutting a workpiece using a band saw. Effect of the Invention

[0007] According to the present invention, it is possible to obtain the effect that faster cutting processing can be performed in a semi-dry manner while sufficiently cooling the band saw blade. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic perspective view showing a state prior to cutting of a band saw 91 which is an example of a band saw according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic perspective view showing the state of the band saw 91 immediately after cutting. [Diagram 3] FIG. 3 is a perspective view showing a first supply unit 71 provided on the band saw 91. As shown in FIG. [Figure 4] FIG. 4 is a perspective view showing the second supply unit 72 provided in the band saw 91. As shown in FIG. [Diagram 5] FIG. 5 is a perspective view showing a remover 73 provided on the band saw 91. As shown in FIG. [Figure 6] FIG. 6 is a schematic diagram for explaining the arrangement position of the cutting oil handling unit 7 equipped on the band saw 91. As shown in FIG. [Figure 7] FIG. 7 is a perspective view showing a remover 73A which is a modified example of the remover 73. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Figures 1 and 2 are perspective views showing a band saw 91 which is an example of a band saw according to an embodiment of the present invention, with Figure 1 showing the state before cutting the workpiece W and Figure 2 showing the state immediately after cutting of the workpiece W is completed. In Figures 1 and 2, the front-rear, left-right, top-bottom directions are defined by the directions indicated by arrows. The front-rear, left-right, top-bottom directions are defined for the convenience of explanation and do not define the posture of the band saw. The top-bottom directions correspond to the direction of gravity (top-bottom direction) in the normal installation posture of the band saw 91.

[0010] As shown in FIG. 1, the band saw machine 91 is a stationary vertical type that cuts a workpiece W by twisting a band saw blade 5 so that it is also possible to cut long objects. The band saw 91 includes a main body 1, a base support 2, a cutting base 3, a work support 6, and a cutting oil handling unit 7.

[0011] The main body 1 is the base of the band saw 91, and integrally supports the base support part 2 and the work support part 6, and has a control part 8 that controls the operation of the chute 63, the product box 64, the tank part 65, and the band saw 91. The base support portion 2 has a drive portion (not shown) and is disposed upright on the base support portion 2. The base support portion 2 moves the cutting base 3 in the front-rear direction by the operation of the drive portion.

[0012] The cutting base 3 has an upper wheel 31 as a first wheel and a lower wheel 32 as a second wheel, which are arranged to be spaced apart in the vertical direction. For example, the upper wheel 31 is a driving wheel, and the lower wheel 32 is a driven wheel. The axis of the lower wheel 32 is parallel to the axis CL31 of the upper wheel 31, and the axis CL31 is set as a horizontal line whose front side is inclined rightward at an angle θa with respect to the front-rear direction. The band saw blade 5 is adjusted for correct tracking by applying tension to the upper wheel 31 and the lower wheel 32. For example, the axial position of the upper wheel 31 relative to the lower wheel 32 is adjusted to allow the band saw blade 5 to track correctly. The band saw blade 5 has a band-shaped body 5a and teeth 5b formed on one edge of the body 5a, and the upper wheel 31 and the lower wheel 32 adjust the tracking so that the teeth 5b are in the forward direction.

[0013] The cutting base 3 has a wheel drive unit 35 that rotates the upper wheel 31, which is a drive wheel, in a predetermined direction. In Fig. 1, the upper wheel 31 rotates in the counterclockwise direction indicated by the arrow DR1 in Fig. 1 about an axis CL31 by the operation of the wheel drive unit 35. This enables the upper wheel 31 and the lower wheel 32 to track the band saw blade 5, and in the pair of portions of the band saw blade 5 extending between the upper wheel 31 and the lower wheel 32, the left pass 5L on the left side runs downward as the first pass, and the right pass 5R on the right side runs upward as the second pass.

[0014] The cutting base 3 has a pair of twisting portions 33, 34 that twist and raise a part of the left path 5L that travels downwardly of the band saw blade 5. Each of the twisting portions 33, 34 has a twisting roller (not shown). Specifically, the band saw blade 5 is sent downward from the upper wheel 31 in the left path 5L with the surface tilted at an angle θa with respect to the front-to-rear direction. The band saw blade 5 is then forcibly twisted by the angle θa in the direction in which the surface faces the front-to-rear direction by the twisting roller of the twisting unit 33 and lowered, and is then twisted back by the angle θa by the twisting roller of the twisting unit 34. The angle θa is 90° or less, for example 45°. The workpiece W is cut by the band saw blade 5 twisted to extend in the front-rear direction between the twisted portion 33 and the twisted portion 34. Therefore, the cut surface of the workpiece W is a surface perpendicular to the longitudinal direction of the workpiece W.

[0015] The cutting base 3 moves in the front-rear direction between a standby position shown in FIG. 1 and a processing end position shown in FIG.

[0016] The work support portion 6 has a work vice 61 and a product vice 62. The work vice 61 holds, in the front-rear direction, a workpiece W such as a bar material that is supplied to the band saw machine 91 from the left side in a position extending in the left-right direction. The product vice 62 is disposed on the movement path of the left path 5L of the band saw blade 5 during the front-rear movement of the cutting base 3, and holds the workpiece W by clamping it so as to straddle the cutting position from left to right. A slit 62b extending in the front-rear direction is formed in the rear vice 62a of the production vice 62. The left path 5L of the band saw blade 5 moves within the slit 62b during cutting.

[0017] The basic operation of the band saw 91 in cutting is as follows: The workpiece W is a long round bar. First, as shown in FIG. 1, the workpiece W is clamped and positioned between the work vice 61 and the product vice 62 so that the cutting position corresponds to the length of the product. Next, the wheel drive unit 35 is operated to rotate the band saw blade 5. Also, the cutting base 3 is moved forward toward the cutting completion position shown in FIG. The left path 5L of the band saw blade 5 moves within the slit 62b of the vice 62a, cutting and severing the workpiece W held in a position extending to the left and right from the rear end side of the cutting position, and separating the product W2 as shown in Figure 2.

[0018] When the product W2 is released from the product vice 62, it falls naturally under its own weight toward the chute 63 disposed below. The chute 63 is disposed in an inclined position facing downward to the right, and a product box 64 is placed below the right end portion. As a result, the product W2 that has fallen into the chute 63 slides down the chute 63 and falls from the right end into the product box 64 to be stored therein.

[0019] The cutting oil handling unit 7 includes at least a first supply unit 71 and a second supply unit 72. The cutting oil handling unit 7 of the band saw 91 shown in FIGS. The tank section 65 has a storage section 652 that stores cutting oil L, which is a cutting fluid to be supplied to the band saw blade 5, a recovery section 651 that recovers the cutting oil L used for lubrication during processing and cooling the band saw blade 5 and chips generated during processing, and a delivery pump 653 that delivers the cutting oil L stored in the storage section 652 to the first supply section 71 and the second supply section 72. However, the cutting oil L or a gas not containing cutting oil may be supplied to the first supply section 71 and the second supply section 72 from a supply source other than the delivery pump 653, or a gas not containing cutting oil may be supplied to the removal section 73. Also, a liquid such as a coolant may be supplied as a cooling fluid to the second supply section 72 instead of a gas not containing cutting oil.

[0020] The second supply unit 71 is provided mainly for the purpose of supplying cutting fluid L to the tips of the teeth 5b of the band saw blade 5 without wetting the workpiece W, and the second supply unit 72 is provided mainly for the purpose of cooling the teeth 5b and body 5a of the band saw blade 5. Thus, since the expectations and effects that the above-mentioned fluids, including cutting fluid and gas, contribute to the band saw blade 5 are different, the designer can select the fluid according to his or her intentions.

[0021] The cutting oil handling portion 7 will be described in detail with reference to FIG. 1 and FIG. 3 to FIG. Fig. 3 is an enlarged perspective view showing the first supply unit 71 and its vicinity in Fig. 1. Fig. 4 is an enlarged perspective view showing the second supply unit 72 and its vicinity in Fig. 1. Fig. 5 is an enlarged perspective view showing the removal unit 73 and its vicinity in Fig. 1.

[0022] 1 and 3, the first supply unit 71 is attached to the cutting base 3 side so as to move together with the cutting base 3. The first supply unit 71 is disposed in the left path 5L of the band saw blade 5 in a range (section) between the upper wheel 31 and cutting position P1, which is the workpiece cutting position. The workpiece cutting position P1 is also the workpiece cutting position. The first supply section 71 may be disposed in correspondence with a range (section) between the lowermost end P6 of the lower wheel 32 and the cutting position P1, which is the workpiece cutting position, along the traveling direction of the band saw blade 5.

[0023] The first supply unit 71 sprays cutting oil L as mist L1 onto the band saw blade 5 for lubrication and cooling. The cutting oil L may be either water-insoluble or water-soluble. The first supply unit 71 may supply cutting fluid by dripping it onto the tooth tips instead of supplying cutting oil L as mist L1 to the tooth tips of the teeth 5b of the band saw blade 5. The amount of cutting oil L or cutting fluid supplied to the tooth tips by the first supply unit 71 is sufficient to lubricate the tooth tips as a lubricant, allowing semi-dry cutting, and a very small amount is sufficient compared to the wet method.

[0024] More specifically, the first supply unit 71 has an outlet 71a that ejects the cutting oil L supplied from the delivery pump 653 as a mist L1. The outlet 71a is disposed so as to face closely the front of the teeth 5b of the band saw blade 5. The mist L1 ejected from the outlet 71a mainly adheres to the teeth 5b of the band saw blade 5. The amount of cutting oil L adhered to the tooth portion 5b by the mist spray from the first supply section 71 is adjusted in advance to an extent that enables the cutting processing of the workpiece W to be performed smoothly and that substantially no cutting oil L remains in the product W2 obtained by the processing.

[0025] In this manner, the band saw blade 5 cuts the workpiece W in a state in which a small amount of cutting oil L is adhered to the teeth 5b by the mist L1 from the first supply unit 71. That is, a semi-dry cutting process is performed.

[0026] 1 and 4, the second supply unit 72 is attached to the cutting base 3 side so as to move together with the cutting base 3. The second supply unit 72 is disposed in the left path 5L of the band saw blade 5 in a range between the cutting position P1 and the lower wheel 32. The second supply unit 72 applies cutting oil L to the band saw blade 5 as a liquid flow L2.

[0027] More specifically, the second supply unit 72 is formed, for example, in the shape of a pipe and has a discharge port 72a at its tip. The discharge port 72a is disposed so as to face closely the front of the teeth 5b of the band saw blade 5. The second supply unit 72 sprays the cutting oil L supplied from the delivery pump 653 from the discharge port 72a not as a mist but as a liquid flow L2 at room temperature or a temperature lower than room temperature, and causes the cutting oil L to flow over the entire band saw blade 5 in the width direction. The flow rate and flow speed of the liquid flow L2 sprayed onto the tooth portion 5b are adjusted in advance to a level that allows for adequate cooling of the band saw blade 5, which has been heated by the cutting process, and sufficient removal and cooling of chips that have been produced by the cutting process and have adhered to the body 5a and tooth portion 5b of the band saw blade 5.

[0028] As a result, the band saw blade 5, which has been heated by cutting the workpiece W in the cutting process, is cooled well by the flowing liquid flow L2. In addition, the deposits such as cutting chips that have clung to the body portion 5a and teeth portion 5b of the band saw blade 5 are removed from the band saw blade 5 while being cooled by the flowing liquid flow L2. The liquid flow L2 after being poured onto the band saw blade 5 and the deposits detached from the band saw blade 5 drop downward and are collected in the recovery section 651 of the tank section 65.

[0029] As shown in FIG. 5, after passing the position of the second supply unit 72 on the left path 5L, the band saw blade 5 passes through the lower wheel 32 and travels upward on the right path 5R. The removal unit 73 is attached to the cutting base 3 side so as to move together with the cutting base 3. The removal unit 73 is disposed in a section between the contact end P4 of the lower wheel 32 and the contact start end P5 of the upper wheel 31 in the right path 5R.

[0030] The remover 73 has a pair of scrapers 73a that contact both sides of the body 5a of the band saw blade 5. The scrapers 73a are made of soft rubber or the like, and slide relatively against the surface of the body 5a of the traveling band saw blade 5 while applying a slight force. Due to the relative sliding of the scraper 73a against the body 5a, the remaining part of the liquid flow L2 poured from the second supply part 72 and the deposits remaining on the surface of the body 5a that could not be completely removed by the liquid flow L2 are scraped off by the scraper 73a and are satisfactorily removed from the surface of the body 5a. The removed cutting oil L and deposits fall downward and are collected in the collection part 651. The removal unit 73 may inject gas that does not contain cutting oil, instead of using the scraper 73a, to blow off the cutting oil L and the deposits.

[0031] In the right pass 5R, even if cutting oil L remains on the band saw blade 5 that has passed through the removal section 73, the components that evaporate due to the relative air flow accompanying the travel are sufficiently evaporated. Therefore, the band saw blade 5 enters the left pass 5L with a dry surface. As a result, the liquid flow L2 sprayed by the second supply section 72 does not affect the semi-dry cutting process performed in the next first supply section 71 by spraying the mist L1 onto the teeth section 5b.

[0032] As described above, the band saw machine 91 has the second supply unit 72, and therefore the band saw blade 5 can be cooled well immediately after cutting processing in the semi-dry method. As a result, the band saw machine 91 has both the advantage that almost no cutting oil adheres to the product obtained by the semi-dry cutting process, and the advantage that the cutting speed of the band saw blade 5 can be increased, improving processing efficiency.

[0033] 6 is a schematic diagram showing the travel path of the band saw blade 5 of the band saw machine 91 and the location of the cutting oil handling unit 7. Hereinafter, the locations of the first supply unit 71, the second supply unit 72, and the removal unit 73, which are the cutting oil handling unit 7, will be described in detail with reference to FIG. 6, the upper wheel 31 and the lower wheel 32 on which the band saw blade 5 is hung are shown with their respective axes CL31, CL32 perpendicular to the plane of the drawing. For ease of understanding and drawing, the band saw blade 5 is shown twisted by 90° between the twisted portions 33, 34 for convenience. In cutting, the position on the rotational travel path of the band saw blade 5 where it first comes into contact with the round bar workpiece W is designated as the workpiece cutting position P1. Hereinafter, the workpiece cutting position P1 will be simply referred to as the cutting position P1. The cutting position P1 is located midway through the left pass 5L, which is the first pass. The band saw blade 5 rotates and travels in a circulating manner in the counterclockwise direction indicated by the arrow DR2 in FIG. 6 by the operation of the wheel drive unit 35. Under the control of the control unit 8, the delivery pump 653 supplies the cutting oil L contained in the container 652 to the first supply unit 71 and the second supply unit 72.

[0034] The first supply unit 71 is disposed in a range AR1 between a position P2 of the lower end of the twisting portion 33 close to the upper wheel 31 and the cutting position P1 in the travel path of the band saw blade 5. The first supply unit 71 sprays the cutting oil L supplied by the delivery pump 653 as a mist L1 onto the tooth portion 5b. The position of the first supply portion 71 in the range AR1 is desirably close to the cutting position P1 so that the cutting oil L adhering to the tooth portion 5b is supplied to the cutting process as soon as possible before it is scattered during travel.

[0035] The second supply unit 72 is disposed in a range AR2 between the cutting position P1 and a position P3 where the body portion 5a contacts the lower wheel 32 on the left path 5L in the travel path of the band saw blade 5. The second supply unit 72 applies the cutting oil L supplied by the delivery pump 653 as a liquid flow L2 over the entire width of the band saw blade 5 including the body portion 5a and the teeth portion 5b. If the position of the second supply section 72 in the range AR2 is on the lower wheel 32 side below the twisting section 33, the liquid flow L2 does not reach the twisting section 33, so that the band saw blade 5 can be more effectively cooled and deposits can be removed.

[0036] The remover 73 is installed corresponding to the right pass 5R of the band saw blade 5. Specifically, the remover 73 is disposed in a range AR3 (section AR3) between a position P4 (contact end P4) where the body portion 5a separates from the lower wheel 32 and a position P5 (contact start P5) where the body portion 5a contacts the upper wheel 31. In addition, if the lower wheel 32 is taken as the reference most upstream position and the band saw blade 5 is interpreted as traveling from upstream to downstream, the removal section 73 should be located upstream of the supply section 71 (on the lower wheel 32 side of the traveling path).

[0037] When the remover 73 is installed in a position close to the lower wheel 32, the band saw blade 5 moves a long distance to position P5 while being exposed to the relative air flow, with the cutting oil L adhering to the surface being mostly scraped off by the remover 73. This further promotes evaporation of the evaporative components of the cutting oil L adhering to the surface of the band saw blade 5.

[0038] On the other hand, when the removal part 73 is installed at a position close to the upper wheel 31, most of the cutting oil L adhering to the surface of the band saw blade 5 falls off due to its own weight while traveling a long distance from the position P4 to the removal part 73, and the amount of cutting oil L that reaches the removal part 73 decreases. Therefore, the cutting oil L can be effectively removed at the removal part 73. The drying of the surface while the band saw blade 5 is traveling on the right path 5R is promoted as the traveling speed, which is proportional to the cutting speed, increases. Therefore, under the cutting processing conditions, the faster the traveling speed of the band saw blade 5 is, the closer the remover 73 should be positioned to the upper wheel 31.

[0039] The installation position of the removal section 73 in the range AR3 should be set to an optimal position depending on the type of cutting oil L and the amount of liquid flow L2 sprayed onto the band saw blade 5 in the second supply section 72, the loop length of the band saw blade 5, and the running speed of the band saw blade 5, so that the surface is sufficiently dry when the band saw blade 5 reaches the next first supply section 71. Depending on these conditions, the surface of the band saw blade 5 will be sufficiently dry when it reaches the first supply unit 71, even without providing the removal unit 73. In other words, the cutting oil handling unit 7 does not need to have the removal unit 73, and it is sufficient that it has at least the first supply unit 71 and the second supply unit 72.

[0040] The embodiments of the present invention are not limited to the configuration of the band saw machine 91 described above, nor to the method for cooling the band saw blade 5 and the procedure for cutting the workpiece, and may be modified within the scope of the present invention.

[0041] The coolant flow L2 sprayed by the second supply unit 72 onto the band saw blade 5 may be at room temperature or at a low temperature. The coolant flow L2 is not limited to oil, but may be water or a mixture of water and oil. In short, any liquid such as a coolant may be used as a cooling fluid. As already mentioned in part, the second supply section 72 may cool the band saw blade 5 by air-cooling by spraying a gas G not containing cutting fluid, as shown by the parenthetical symbols in Figures 2 and 6, instead of spraying a liquid flow L2. The remover 73 is not limited to the one using the scraper 73a. For example, as in the modified remover 73A shown in Fig. 7, a high-speed gas G2 is blown from a nozzle 73b onto the surface of the band saw blade 5 to blow off the adhering liquid or to actively evaporate it to dry it. The band saw machine 91 does not have to be one that applies a twist to the band saw blade 5. In other words, the band saw machine 91 does not have to be equipped with the twisting portions 33, 34. The band saw 91 may be of a horizontal type in which the axes CL31 and CL32 are vertical or at an angle close to the vertical. [Explanation of symbols]

[0042] 1 Main unit 2 Base support 3 Cutting Base 31 Upper wheel (first wheel) 32 Lower wheel (second wheel) 33,34 Torsion section 35 Wheel drive unit 5 Bandsaw Blades 5a Torso 5b Teeth 5L Left Pass 5R Right Pass 6 Work support part 61 Work vice 62 Product Vice 62a Vice 62b Slit 63 Shooter 64 product boxes 65 Tank section 651 Recovery Department 652 Storage unit 653 Delivery Pump 7 Cutting oil handling section 71 1st supply section 71a spout 72 2nd supply section 72a Discharge port 73,73A removal part 73a Scraper 73b spout 8. Control Unit 91 Band saw machine AR1~AR3 range CL31,CL32 axis line G, G2 Gas L Cutting oil L1 Mist L2 liquid flow P1 cutting position P2~P5 position Double work W2 Products θa angle

Claims

1. The workpiece is cut using a semi-dry method, a first wheel for tensioning the band saw blade to ensure proper tracking, and a second wheel disposed below the first wheel; a first supply unit that is disposed between a lowermost end of the second wheel that travels from the second wheel toward the first wheel in a rotational travel path of the band saw blade and a cutting position of the workpiece, and that sprays a mist of cutting fluid onto the teeth of the band saw blade; A second supply unit is disposed between a cutting position of the workpiece and the second wheel, and supplies or sprays a cutting fluid or a cooling fluid to the band saw blade; a removal section provided in a section of the rotational path of the band saw blade from the contact end of the second wheel to the contact start of the first wheel, and between the contact end of the second wheel and the first supply section, for removing deposits attached to the band saw blade and the cutting fluid or the cooling fluid; Equipped with The removal unit removes the deposits and the cutting fluid or the cooling fluid by sliding a scraper relative to the surface of the traveling band saw blade, The removal unit is disposed at a position such that the traveling band saw blade reaches the first supply unit in a dry state.

2. A method for cutting a workpiece using a band saw, the method comprising the steps of: applying tension to a band saw blade to ensure proper tracking; cutting a workpiece in a semi-dry manner using a band saw having a first wheel and a second wheel disposed below the first wheel; In a first supply section between the lowermost end of the second wheel, which travels from the second wheel toward the first wheel in the rotational travel path of the band saw blade, and a workpiece cutting position, the cutting fluid is sprayed or dropped onto the teeth of the band saw blade to cool the band saw blade; In a second supply section between the workpiece cutting position and the second wheel, a cutting fluid or a cooling fluid is poured or sprayed onto the band saw blade to cool the band saw blade; A method for cutting a workpiece using a band saw, comprising the steps of: removing deposits and the cutting fluid or the cooling fluid adhered to the band saw blade using a scraper provided in the section from the contact end of the second wheel to the contact start of the first wheel and from the contact end of the second wheel to the first supply section; and setting the installation position of the scraper so that the traveling band saw blade reaches the first supply section in a dry state.

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