Cutting chip treatment method of band saw machine and band saw machine

Abstract

To provide a cutting chip treatment method of a band saw machine which enables an operator's burden reduction and a long-time automatic operation.SOLUTION: A cutting chip treatment method of a band saw machine includes: by using a band saw machine (91) which can obliquely cut a workpiece (W) by turning, at a predetermined angle, a turning member (T) including a cutting head (3) which circulates a band saw blade (34) by continuous rotation by means of a drive wheel (31) and a follower wheel (32) and a conveyor unit (5) which is arranged in a vertical direction of a tooth tip of the band saw blade (34) directed to the workpiece (W), and stores and accumulates cutting chips (Cp1) produced during cutting or operates so as to discharge the cutting chips, discharging the cutting chips stored and accumulated by operating the conveyor unit (5) when the turning member (T) is at a first turning angle, and stopping the operation of the conveyor unit (5) to store and accumulate the cutting chips when the turning member (T) is at a second turning angle different from the first turning angle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for disposing of chips in a band saw and to a band saw. [Background technology]

[0002] Patent Document 1 describes a chip conveyor that is disposed below a band saw blade in a horizontal band saw machine and that collects and discharges to the outside chips that are generated and fall when the band saw blade cuts a workpiece. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4602439 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, in cutting processes using a band saw, a storage box (hereinafter referred to as "chip box") is placed below one end of the chip conveyor to collect chips that are transported by the conveyor belt and fall from that end, and when a certain amount of chips has accumulated in the chip box, an operator moves the chip box to a discharge location to discharge the chips.

[0005] On the other hand, some band saws can rotate the cutting head, which circulates the band saw blade by continuous rotation of a drive wheel and a driven wheel, so that the cutting head can cut obliquely with respect to the extension direction of a long workpiece. In band saws that can perform oblique cutting, the cutting head and the chip conveyor are generally integrated. Therefore, the operator must change the position of the chip box every time the angle of the cutting head changes so that the chip box is always located below the conveying tip of the chip conveyor. This places a heavy burden on the operator, and the operation of the band saw must be stopped every time the position of the chip box is changed, reducing the processing efficiency and preventing long-term automatic operation.

[0006] Therefore, there is a need for a method for disposing of chips from a band saw and for a band saw that reduces the burden on the operator and enables automatic operation for long periods of time. [Means for solving the problem]

[0007] In order to solve the above problems, one embodiment of the chip processing method for a band saw machine of the present invention uses a band saw machine that can cut the work at an angle by rotating a rotating member at a predetermined angle, the rotating member including a cutting head that circulates the band saw blade by continuous rotation of a drive wheel and a driven wheel, and a conveyor unit that is arranged vertically to the tip of the band saw blade facing the work and operates to collect, accumulate, or discharge chips generated during cutting, and when the rotating member is at a first rotation angle, the conveyor unit is operated to discharge the collected and accumulated chips, and when the rotating member is at a second rotation angle different from the first rotation angle, the operation of the conveyor unit is stopped to collect and accumulate the chips.

[0008] In addition, one embodiment of a band saw machine of the present invention includes a cutting head that circulates the band saw blade by continuous rotation of a drive wheel and a driven wheel, a conveyor unit that is arranged vertically to the tip of the band saw blade facing the workpiece and operates to collect, accumulate, or discharge chips generated during cutting processing, and is equipped with a rotating member that can rotate at a predetermined angle, and a control unit that controls the circulation of the band saw blade and the operation of the conveyor unit, wherein the control unit controls the conveyor unit to operate when the rotating member is at a first rotation angle to discharge the collected and accumulated chips, and to stop operation to collect and accumulate the chips when the rotating member is at a second rotation angle different from the first rotation angle. Effect of the Invention

[0009] According to one aspect of the method for processing chips on a band saw and the band saw of the present invention, the burden on the operator is reduced and automatic operation for long periods of time is possible. [Brief description of the drawings]

[0010] [Figure 1]FIG. 1 is a perspective view showing a band saw 91 for carrying out one embodiment of the method for removing chips from a band saw of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the conveyor unit 5 and the chip box 8 provided in the band saw 91. As shown in FIG. [Diagram 3] FIG. 3 is a top view of the band saw 91 at a first turning angle. [Figure 4] FIG. 4 is a top view of the band saw 91 at the second pivot angle. [Diagram 5] FIG. 5 is a vertical cross-sectional view for explaining the conveyor unit 5 and the chip accumulation body CpG accommodated therein. [Figure 6] FIG. 6 is a block diagram of the band saw 91. [Figure 7] FIG. 7 is a diagram for explaining the chip volume ratio α. [Figure 8] FIG. 8 is a schematic diagram showing an example of cutting a long workpiece W. [Figure 9] FIG. 9 is a diagram showing a flow FA of a basic chip processing method in one embodiment of the chip processing method for a band saw machine of the present invention. [Figure 10A] FIG. 10A is a diagram showing the first stage of a flow FB of a chip processing method in automatic operation in one embodiment of the chip processing method for a band saw machine of the present invention. [Figure 10B] FIG. 10B shows the latter stage of the flow FB. [Figure 11] FIG. 11 is a perspective view showing a conveyor unit 5A which is a modified example of the conveyor unit 5. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] One embodiment of the method for processing chips of the band saw of the present invention is carried out by a band saw 91 which is one embodiment of the band saw of the present invention. First, the configuration of the band saw 91 will be described with reference to Figs. 1 to 7. Fig. 1 is a perspective view showing the band saw 91 which executes the method for processing chips of the band saw of the present invention. Fig. 2 is a perspective view showing the conveyor unit 5 and the chip box 8 provided in the band saw 91. Fig. 3 is a top view of the band saw 91 at a first rotation angle. Fig. 4 is a top view of the band saw 91 at a second rotation angle. Fig. 5 is a vertical cross-sectional view for explaining the conveyor unit 5 and the chip accumulation body CpG accommodated therein. Fig. 6 is a block diagram of the band saw 91. Fig. 7 is a diagram for explaining the chip volume rate α. In the following description, the up, down, left, right, front and rear directions are defined as the directions indicated by the arrows in Fig. 1 for convenience.

[0012] As shown in FIG. 1, the band saw 91 includes a base 1, a base 6, a pair of support columns 2, a cutting head 3, a conveyor unit 5, a control device 7, and a tip box 8.

[0013] The base 1 is placed on a floor FL. The base 6 is supported by the base 1 so as to be rotatable about an axis CL3 extending in the vertical direction. The base 6 can be turned by the operator's manual power, but when the band saw 91 is equipped with a turning motor 57 (see FIG. 6), the base 6 is turned by the turning motor 57. A conveyor unit 5 is fixed to the upper part of the base 6, and a pair of columns 2 are erected in parallel in a posture extending in the vertical direction. The cutting head 3 is supported by the pair of columns 2 and is raised and lowered by the operation of the lifting motor 37 (see arrow DR1). As a result, the base 6, the columns 2 integrated with the base 6, the cutting head 3, and the conveyor unit 5 are turned as a turning member T around an axis CL3 extending in the vertical direction relative to the base 1 (see arrow DR3).

[0014] The cutting head 3 has a frame 35, a drive wheel 31, a driven wheel 32, a band saw blade 34, a blade motor 36, and the lifting motor 37 already described. The frame 35 extends in the left-right direction and is formed as a long and slender skeletal member spanning a pair of support columns 2. The frame 35 is supported by the pair of support columns 2 so as to be lifted and lowered by the operation of the lifting motor 37 (see arrow DR1). The left end of the cutting head 3 is provided with the drive wheel 31 that is rotated by the blade motor 36, and the right end is provided with the driven wheel 32 that is driven by the rotation of the drive wheel 31 via the band saw blade 34. The band saw blade 34 is rotated between the drive wheel 31 and the driven wheel 32. teeth Tension is applied to adjust the tracking. As a result, when the drive wheel 31 and the driven wheel 32 are continuously rotated by the rotation of the blade motor 36, the band saw blade 34 circulates, for example, in the direction of the arrow DR2 (clockwise direction in FIG. 1). Hereinafter, the blade motor 36 and the lift motor 37 may be collectively referred to as the cutting head drive unit M (see FIG. 6).

[0015] 1, a long work W (hereinafter also referred to as long work W) is supplied from the rear side below the cutting plate of the band saw machine 91 in a posture extending in the front-rear direction by a work carrying device (not shown). In a processing operation, the cutting head 3 descends from the elevated standby position shown in FIG. 1 and cuts the long work W so as to have a cutting surface extending in the left-right and up-down directions.

[0016] The swivel member T can be rotated to a second swivel angle of angle θa shown in Fig. 4 (see arrow DR3) relative to a first swivel angle in which the longitudinal direction of the cutting head 3 is in the left-right direction as shown in Fig. 1 and Fig. 3. When the cutting head 3 is at the first swivel angle, the long workpiece W arranged to extend in the front-to-rear direction is cut by the band saw blade 34, which runs with its teeth twisted in a direction perpendicular to the long workpiece W, so that the cut surface is perpendicular to the extension direction (front-to-rear direction) of the long workpiece W.

[0017] Fig. 4 shows a state where the swivel member T is rotated to a second swivel angle of angle θa from the first swivel angle shown in Fig. 3. The maximum angle θa is, for example, 45°. That is, the swivel member T is capable of swivel at an angle θa within a range of, for example, 0°≦θa≦45°. By rotating the swivel member T from the first swivel angle to a second swivel angle of angle θa and cutting the long workpiece W, it becomes possible to obliquely cut the long workpiece W such that the cut surface forms an angle θa with respect to a direction perpendicular to the extension direction of the long workpiece W.

[0018] Chips generated when cutting a long workpiece W with the band saw blade 34 fall from the cutting site in the vertical direction (downward) of the tooth tip of the band saw blade 34 while scattering to some extent. The conveyor unit 5 has a width sufficient to collect chips Cp1 (see FIG. 5) that fall while scattering to some extent. Next, the conveyor unit 5 will be described mainly with reference to FIG. 2 and FIG. 5.

[0019] The conveyor unit 5 includes a box panel 51, a drive motor 52, and a conveyor section 53. The box panel 51 is a box-shaped housing that extends in the left-right direction and has a generally rectangular cross section perpendicular to the left-right direction, with the right end side slightly inclined downward. The center of the upper surface of the box panel 51 is formed with opening edges 51a at positions close to the left and right side edges to form an opening 55a. The opening 55a is set to a range that includes the range into which the chips generated by cutting with the band saw blade 34 described above fall. That is, as shown in FIG. 5, the chips Cp1 generated by cutting pass through the opening 55a and enter the inside of the box panel 51, and accumulate as chips Cp2 on the bottom surface 51b of the box panel 51.

[0020] The conveyor unit 53 is a scraper-type conveyor arranged inside the box panel 51. That is, the conveyor unit 53 has a pair of loop-shaped endless chain conveyors 531 arranged in front and rear, and a plurality of scrapers 532 fixed to the chains of the pair of conveyors 531 at predetermined intervals.

[0021] The conveyor 531 is rotatably supported on the driven sprocket 522 at its left side and on the driving sprocket 521 connected to the driving motor 52 at its right side. The trajectory of the conveyor 531 is determined by the guide portion 54. When the driving motor 52 is driven in the conveyor unit 5 having this configuration, the conveyor 531 circulates in a counterclockwise direction as indicated by the arrow DR6 in FIG. 5. As the conveyor 531 circulates, the scraper 532 comes into contact with the bottom surface 51b of the box panel 51 and slides to the right. Therefore, the chips Cp2 accumulated on the bottom surface 51b are scraped off by the scraper 532 and discharged to the outside as discharged chips Cp3 from the discharge port 55b opened at the right end of the bottom surface 51b.

[0022] 1 and 6, the control device 7 includes a control unit 71, an input unit 72, and an output unit 73. The control unit 71 includes a CPU (Central Processing Unit) 711, which is a central processing unit, a memory unit 712, and a chip amount estimation unit 713. The control unit 71 controls the overall operation of the band saw 91, including the operation of the drive motor 52 and the cutting head drive unit M.

[0023] The input unit 72 is a keyboard or touch panel, and allows the operator to input operation selection, setting values, etc. to the control unit 71. The output unit 73 outputs information such as the operating state and setting contents of the band saw machine 91 to the operator by voice or image. The memory unit 712 stores processing programs and the like for processing with the band saw machine 91. The chip amount estimation unit 713 estimates the amount of chips Cp1 generated in the next processing from the program, conditions, etc. of the next processing stored in the memory unit 712.

[0024] The chip box 8 is a box with casters and has a capacity capable of accommodating the discharged chips Cp3 discharged from multiple cutting processes. The chip box 8 can be moved by a person even when the chip box 8 is filled with the upper limit amount of discharged chips Cp3. The chip box 8 is placed on the floor FL below the discharge port 55b of the conveyor unit 5 by an operator. The chip box 8 may be removably attached to the base 1 so as to be located, for example, below the discharge port 55b of the conveyor unit 5 of the cutting head 3 at the first rotation angle.

[0025] In one aspect of the method for processing chips on a band saw of the present invention, which is executed using the above-mentioned band saw 91, when cutting a long workpiece W, the amount of chips that can be accumulated in the conveyor unit 5 when the conveyor section 53 is not in operation (when chips are not discharged) is determined in advance and stored as one of the set values ​​in the memory section 712. The amount of chips that can be accumulated when the conveyor unit 5 is not in operation is evaluated by volume and is referred to as the allowable accumulated chip volume Qa.

[0026] The amount of chip volume Q generated in one cut, which is the basis of the allowable accumulated chip volume Qa, is estimated based on the volume of the long workpiece W used for cutting, as shown in the following (Equation 1). In this (Equation 1), A is the cross-sectional area of ​​the long workpiece W, d is the cutting allowance (length), and α is the chip volume rate. Furthermore, the angle θ is defined as 0° in the direction perpendicular to the extension direction of the long workpiece W. Therefore, θ=0° in the first angle position, and θ=θa in the second angle position. Q=(A / cosθ)×d×α (Formula 1)

[0027] An example in which the long workpiece W is a square timber is shown in Figure 7. In Figure 7, A is the area of ​​a hatched rectangle. Also, the area A2 of the inclined surface with an angle θ is expressed as A / cosθ.

[0028] The chip volume ratio α is a ratio obtained by dividing the spatial volume occupied by chips generated by actual cutting by the volume of the portion of the long workpiece W before cutting that will become chips. The chip volume ratio α varies depending on the material and cutting conditions of the long workpiece W, and is therefore measured in advance for each material and cutting condition of the long workpiece W that may be cut by the band saw 91, and stored in the memory unit 712. The chip volume ratio α is about 7 to 8 under typical materials and conditions.

[0029] Next, the operation of one embodiment of the method for processing chips on a band saw of the present invention will be described with reference to Figs. 8 to 10B. Fig. 8 is a schematic diagram showing an example of cutting a long workpiece W. Fig. 9 is a diagram showing a flow FA of a basic chip processing method in one embodiment of the method for processing chips on a band saw of the present invention. Fig. 10A is a diagram showing the first stage of a flow FB of a chip processing method in automatic operation in one embodiment of the method for processing chips on a band saw of the present invention. Fig. 10B is the second stage of the flow FB.

[0030] The cutting process of the long work W by the band saw machine 91 will be described using an example shown in Fig. 8, which includes multiple straight cuts that are perpendicular to the extension direction of the long work W and multiple oblique cuts that are oblique cuts. The control unit 71 of the band saw machine 91 executes basic chip processing operations according to a flow FA in Fig. 9, based on an allowable chip accumulated volume Qa previously acquired and stored in the memory unit 712.

[0031] In this chip disposal operation, when the cutting head 3 is at the first rotation angle, the control unit 71 operates the drive motor 52 of the conveyor unit 5 to perform a chip discharge operation in addition to the cutting operation in the cutting process. Also, when the cutting head 3 is at the second angular posture, the control unit 71 controls the drive motor 52 to stop and not perform a chip discharge operation.

[0032] First, the control unit 71 operates the drive motor 52 to circulate the conveyor unit 53, and causes the scraper 532 to remove any residual cutting chips from previous processing that have accumulated on the bottom surface 51b of the box panel 51, thereby emptying the conveyor unit 53 to zero (S1).

[0033] After step (S1) is executed, the iteration variable k is set to 0 (zero), and the chip volume Q generated in the kth cutting is calculated. k is set to 0 (zero) (S2).

[0034] The chip amount estimation unit 713 of the control unit 71 estimates the chip volume Q generated in the next machining from various data of the next machining stored in the memory unit 712. k+1 Estimate (S3). Next, the chip amount estimation unit 713 assumes that the chips from the previous process have been accumulated in the conveyor unit 5, and compares the remaining accumulated amount of the chips with the amount of chips estimated to be generated in the next process to determine whether the chip amount can be accumulated in the conveyor unit 5 by comparing it with a preset allowable chip cumulative volume Qa. k +Q k+1 It is determined whether or not Qa is satisfied (S4).

[0035] In the case of the first cutting process where k=0, the allowable chip cumulative volume Qa is set to be sufficiently large relative to the chip volume Q for one cutting process, so the determination in (S4) will not substantially be negative. On the other hand, in the case of the second or subsequent cutting processes (when k is 1 or more), the determination may be negative. If the determination is negative (NO), the control unit 71 operates the drive motor 52 to discharge the chip accumulation body CpG currently accumulated on the conveyor unit 5 (S8).

[0036] Next, cutting is performed (S9), and k is incremented (S10). Then, the control unit 71 determines whether or not there is a next process (S11), and if not (NO), ends the flow FA, and if yes (YES), returns to step (S3).

[0037] Based on the above-mentioned flow FA, the cutting example shown in Fig. 8 will be described. The cutting example shown in Fig. 8 is an example in which cutting is performed on a long workpiece W of H-shaped steel (I-beam, H-beam) in order from the left side of Fig. 8, where L means straight cut and R means diagonal cut. That is, a total of eight cuts are performed on the long workpiece W, and from the first cut, the cuts are the first straight cut (L1), the first diagonal cut (R1), the second straight cut (L2), the second diagonal cut (R2), the third straight cut (L3), the third diagonal cut (R3), the fourth diagonal cut (R4), and the fourth straight cut (L4). Hereinafter, for convenience, they are referred to as L1 to L4 and R1 to R4, respectively.

[0038] First, as an initial state, the cutting head 3 is set at a first rotation angle, and the chip box 8 is set at a position below the discharge port 55b. Next, the control unit 71 executes the chip discharge operation of the conveyor unit 5 to discharge the chip accumulation body CpG accumulated in the conveyor unit 5, and empties the conveyor unit 5.

[0039] If the allowable chip cumulative volume Qa of the conveyor unit 5 allows the accumulation of the chip volume from one diagonal cut but cannot accumulate the chip volume from two diagonal cuts, the discharge timings for the conveyor unit 5 to perform the chip discharge operation correspond to L1, L2, L3, and L4. In the straight cuts of L1 to L4, the chip discharge operation is performed together with the cutting process. This chip discharge operation continues for a certain period of time even after the band saw blade 34 has stopped in order to discharge the remaining chips from the conveyor unit 5 to the outside. This operation is automatically performed under the control of the control unit 71.

[0040] On the other hand, for R3, which is an oblique cut, the cutting process does not involve a chip discharge operation. Therefore, when R3 is completed, the operator returns the cutting head 3 from the second rotation angle to the first rotation angle, and then instructs the control unit 71 from the input unit 72 to execute a chip discharge process and discharge the chips accumulated in the conveyor unit 5. After that, the operator returns the cutting head 3 to the second rotation angle. If the band saw 91 is equipped with a rotation motor 57, this series of operations is automatically executed under the control of the control unit 71.

[0041] Next, if the allowable chip cumulative volume Qa allows the accumulation of the chip volume equivalent to two diagonal cuts but does not allow the accumulation of the chip volume equivalent to three diagonal cuts, the timings for causing the conveyor unit 5 to perform the chip discharge operation are L1, L2, L3, and L4, and each of these is performed automatically in conjunction with the straight cut processing.

[0042] Generally, in order to improve yield, steel frame components are often cut in a pattern where straight cuts and diagonal cuts are alternately repeated. Therefore, there are few cases where diagonal cuts are repeated as in the above processing example, and after the first diagonal cut, the tool returns to the first angle position for chip discharge, and then returns to the second angle position again, so the effect on the efficiency of actual product cutting is relatively small.

[0043] A flow FB of an oblique chip disposal operation that generalizes the above-mentioned cutting example including straight cutting and oblique cutting is shown in Fig. 10A and Fig. 10B, which are divided into a first stage and a second stage. That is, Fig. 10A is a diagram of the first stage of a flow FB of a chip disposal method in an automatic operation in one embodiment of the chip disposal method for a band saw machine of the present invention. Fig. 10B is a diagram of the second stage of the flow FB.

[0044] The cutting process to which the flow FB is applied is a continuous process that includes both straight cutting at a first swing angle and oblique cutting at a second swing angle for one long workpiece W, and is intended for long-term continuous automatic operation. Therefore, the band saw 91 described here has a swing motor 57 that is responsible for the swinging operation of the cutting head 3. The swing motor 57 is included in the cutting head drive unit M (see FIG. 6), and the swing operation and swing angle are controlled by the control unit 71.

[0045] First, the band saw 91 is set to an initial state (S21). In the initial state, the conveyor 53 is stopped, the chip stack CpG accumulated in the conveyor unit 5 is set to 0 (zero) and empty, and the cutting head 3 is set to a first rotation angle. The control unit 71 sets the repetition variable k to 0 (zero), and calculates the chip volume Q generated in the kth cut. k is set to 0 (zero) (S22).

[0046] The control unit 71 judges whether the next machining is to be performed at the second rotation angle or not from the machining program stored in the memory unit 712 (S23). If the judgment is negative (NO), that is, if the machine is at the first rotation angle, the control unit 71 starts the conveyor unit 53 to perform a chip discharge operation (S24) and executes a cutting process (S25). Then, after the chips are discharged, the control unit 71 stops the conveyor unit 53 (S26). If the control unit 71 does not want to end the automatic operation (S27: NO), it proceeds to step (S23), and if the automatic operation is to be ended (S27: YES), it resets the accumulated chip volume (S28) and ends the automatic operation (FIG. 9B: S45).

[0047] If the determination in step (S23) is YES, the chip amount estimation unit 713 of the control unit 71 estimates the chip volume Q generated in the next machining (k+1th machining) from the machining program. k+1 Next, the chip amount estimation unit 713 assumes that the chips from the previous machining are accumulated in the conveyor unit 5, and judges whether the chip volume, which is the sum of the remaining accumulated amount of chips and the chip volume generated in the next machining, can be accumulated in the conveyor unit 5 by comparing it with a preset allowable chip cumulative volume Qa. That is, Q k +Q k+1 It is determined whether or not Qa is satisfied (S30).

[0048] If the determination in step S30 is negative (NO), the control unit 71 sets the cutting head 3 to the first pivot angle (S31). Step S31 is an operation in which, if the cutting head 3 is already at the first pivot angle at this stage of determination, it is maintained at the first pivot angle, and if it is at the second pivot angle, it is rotated to the first pivot angle.

[0049] Then, the control unit 71 starts the conveyor unit 53 to discharge the chips (S32), and stops the conveyor unit 53 after the chips are discharged (S33). Next, the control unit 71 resets the integrated chip volume (S34), and determines whether or not to end the automatic operation (S35). If the determination is yes (YES), the automatic operation ends (S45). If the determination is no (NO), the process proceeds to step (S23).

[0050] If the determination in step S30 is YES, the control unit 71 sets the cutting head 3 to the second pivot angle (S36). Step S36 is an operation in which, if the cutting head 3 is already at the second pivot angle at this stage of determination, it is maintained at the second pivot angle, and if it is at the first pivot angle, it is rotated to the second pivot angle.

[0051] The control unit 71 executes cutting (S37). Since this cutting is performed at the second rotation angle, the conveyor unit 53 is not in operation. After the cutting is completed, Q k =Q k +Q k+1 (S38), k is incremented to k=k+1 (S39), and it is determined whether or not to end the automatic operation (S40). If the determination in step (S40) is negative (NO), the process proceeds to step (S23). If the determination is positive (YES), the control unit 71 causes the cutting head 3 to rotate to a first rotation angle (S41) and starts the conveyor unit 53 (S42). Then, after the chips are discharged, the conveyor unit 53 is stopped (S43), the integrated chip volume is reset (S44), and the automatic operation is ended (S45).

[0052] As described above, according to one embodiment of the chip disposal method using the band saw 91, the band saw 91 is configured to accumulate chips up to a predetermined accumulation amount, the allowable chip cumulative volume Qa, with the conveyor unit 5 stopped during cutting at the second rotation angle. This allows the chip discharge operation in the conveyor unit 5 to be performed only when the cutting head 3 is at the first rotation angle, and the operator does not need to move the chip box 8 to a position corresponding to the second rotation angle each time, reducing the operator's workload. Also, even in automatic operation in which straight cutting and oblique cutting are mixed, the operator does not need to move the chip box 8 to a position corresponding to the second rotation angle, reducing the operator's workload and enabling long-term automatic operation.

[0053] One aspect of the present invention is not limited to the above-described configurations and procedures, and may be modified within the scope of the present invention.

[0054] The conveyor unit 5 has been described as having a configuration in which the discharge side is slightly inclined downward, but is not limited to this configuration. When a lubricating liquid is used for cutting, the chip accumulation body CpG contains a large amount of lubricating liquid. In that case, the conveyor unit 5 may be replaced with a modified conveyor unit 5A shown in FIG. 11. The conveyor unit 5A has a box panel 51A, an opening edge portion 51aA, a drive motor 52A, a conveyor 531A, a scraper 532A, and an outlet 55bA, which correspond to the box panel 51, the opening edge portion 51a, the drive motor 52, the conveyor 531, the scraper 532, and the outlet 55b in the conveyor unit 5, respectively. Furthermore, the conveyor unit 5A has an inclined upwardly inclined portion 56A on the right discharge side of the box panel 51A, and the outlet 55bA is formed on the lower surface of the tip of the inclined portion 56A. Therefore, the chip accumulation body CpG can be discharged by so-called draining and stored in the chip box 8.

[0055] The first turning angle is a position where the workpiece W is cut in a direction perpendicular to the longitudinal direction, i.e., θa=0°, as an example, but it is not limited to this, and any turning angle may be set within the turning angle range. For example, when the processing to be performed involves many oblique cuts and few straight cuts, the turning angle for making oblique cuts may be set as the first turning angle. Specifically, when there are many oblique cuts of θa=30°, the range of 30°±β may be set as the first turning angle, and the other range may be set as the second turning angle, and the chip box 8 may be placed at a position where it can accommodate the discharged chips Cp3 discharged within the range of 30°±β. In this case, the straight cut is the second turning angle, and the turning angle at which the chip box 8 is not installed is set.

[0056] The first turning angle may have a certain angle range, such as ±β described above. Naturally, even if the angle is slightly different, the chips Cp3 discharged into the chip box 8 can be accommodated. β may be set to, for example, about 3°.

[0057] As described above in detail, one embodiment of the method for processing chips in a band saw machine of the present invention is a method using a band saw machine 91 that can cut a workpiece W at an angle by rotating a rotating member T at a predetermined angle, the rotating member T including a cutting head 3 that circulates the band saw blade 34 by continuous rotation by a drive wheel 31 and a driven wheel 32, and a conveyor unit 5 that is arranged vertically to the tip of the teeth of the band saw blade 34 facing the workpiece W and operates to collect, accumulate, or discharge chips Cp1 generated during cutting processing, and when the rotating member T is at a first rotation angle, the conveyor unit 5 is operated to discharge the collected and accumulated chips Cp2, and when the rotating member T is at a second rotation angle different from the first rotation angle, the operation of the conveyor unit 5 is stopped to collect and accumulate the chips Cp2.

[0058] In this embodiment, chips are accumulated on the conveyor unit 5 at the second rotation angle, and the accumulated chips are discharged at the first rotation angle. Therefore, the chip box 8 can be placed in the same position, and does not need to be moved every time the cutting head 3 rotates. This reduces the burden on the worker.

[0059] In this embodiment, when the workpiece W has a longitudinal shape, the first rotation angle may be set to a position at which the workpiece is cut in a direction perpendicular to the longitudinal direction.

[0060] As a result, the discharge operation is performed in the direct cutting, which generally involves a large number of cuts, improving the processing efficiency in automatic continuous operation.

[0061] In addition, in this embodiment, the volume of chips that can be accumulated in the conveyor unit 5 may be previously determined as an allowable chip cumulative volume Qa, the chip volume Q that will be generated in the next processing step may be estimated, and the estimated chip volume Q may be compared with the allowable chip cumulative volume Qa. Depending on the comparison result, it may be determined whether or not to operate the conveyor unit 5 to discharge the stored chips Cp2 before executing the next processing step.

[0062] This makes it possible to more accurately estimate the timing for discharging the chips Cp2 accumulated on the conveyor unit 5, thereby minimizing the number of discharge operations in multiple consecutive cutting processes and improving the processing efficiency.

[0063] In addition, one embodiment of the band saw machine of the present invention includes a cutting head 3 that circulates a band saw blade 34 by continuous rotation by a drive wheel 31 and a driven wheel 32, a conveyor unit 5 that is arranged vertically to the tip of the band saw blade 34 facing the workpiece W and operates to collect, accumulate, or discharge chips Cp1 that are generated and fall when the workpiece W is cut, a rotating member T that can rotate at a predetermined angle, and a control unit 71 that controls the circulation of the band saw blade 34 and the operation of the conveyor unit 5, and the control unit 71 controls the conveyor unit 5 to operate when the rotating member T is at a first rotation angle to discharge the collected and accumulated chips Cp2, and to stop operation and accumulate the collected and accumulated chips Cp2 when the rotating member T is at a second rotation angle different from the first rotation angle.

[0064] In this embodiment, chips are accumulated on the conveyor unit 5 at the second rotation angle, and the accumulated chips are discharged at the first rotation angle. Therefore, the chip box 8 can be placed in the same position, and does not need to be moved every time the cutting head 3 rotates. This reduces the burden on the worker.

[0065] In addition, in this embodiment, when the workpiece W has a shape having a longitudinal side, the first rotation angle may be a position at which the workpiece W is cut in a direction perpendicular to the longitudinal direction.

[0066] As a result, the discharge operation is performed in the direct cutting, which generally involves a large number of cuts, improving the processing efficiency in automatic continuous operation.

[0067] In addition, in this one embodiment, the control unit 71 has a memory unit 712 and a chip amount estimation unit 713, and the memory unit 712 stores a previously determined volume of chips that can be accumulated in the conveyor unit 5 as an allowable chip accumulated volume Qa, and the chip amount estimation unit 713 estimates a chip volume Q generated in the next processing step, and determines whether or not to operate the conveyor unit 5 to discharge the stored chips Cp2 before performing the next processing step depending on the result of comparing the estimated chip volume Q with the allowable chip accumulated volume Qa.

[0068] This makes it possible to more accurately estimate the timing for discharging the chips Cp2 accumulated on the conveyor unit 5, thereby minimizing the number of discharge operations in multiple consecutive cutting processes and improving the processing efficiency.

[0069] In addition, one embodiment of the method for processing chips in a band saw machine of the present invention uses a band saw machine 91 that can cut a workpiece W obliquely by rotating a rotating member T at a predetermined angle, the rotating member T including a cutting head 3 having a circulating band saw blade 34 and a conveyor unit 5 arranged below the band saw blade 34 and capable of accommodating and discharging chips Cp1 that are generated and fall when cutting the workpiece W, and grasps in advance the volume of chips that can be accumulated in the conveyor unit 5 as an allowable chip cumulative volume Qa, estimates the chip volume Q that will be generated in the next processing, and calculates the estimated chip volume Q. k+1 and the chip volume Q accumulated in the conveyor unit 5 at that time. k and comparing the total amount of chips with the allowable accumulated chip volume Qa, and if the total amount of chips exceeds the allowable accumulated chip volume Qa, the conveyor unit 5 is operated to discharge the stored chips before the next machining is performed. [Explanation of symbols]

[0070] 1 Base 2 pillars 3 Cutting head 31 Drive Wheel 32 Driven Wheel 34 Bandsaw Blade 35 Frames 36 blade motor 37 Lifting motor 5,5A Conveyor Unit 51,51A Box Panel 51a,51aA Opening edge 51b Bottom 52,52A drive motor 521 Drive sprocket 522 driven sprocket 53 Conveyor Section 531,531A Conveyor 532,532A Scraper 54 Guide part 55a opening 55b,55bA outlet 56A Inclined ascending section 57 Swing motor 6. Base 7 Control device 71 Control Unit 711 CPU (Central Processing Unit) 712 Storage section 713 Chip amount estimation section 72 Input section 73 Output section 8 Tip Box 91 Band saw machine A Cross-sectional area A2 area CL3 axis Cp1, Cp2 chips CpG chip accumulator Cp3 Exhaust chips d Cutting margin FA,FB flow FL floor M Cutting head drive unit Q Chip volume Qa Allowable chip volume T pivot member W Long work (work) θa,θ angle α Chip volume ratio

Claims

1. A band saw machine capable of cutting the work obliquely by rotating a rotating member at a predetermined angle, the rotating member including a cutting head for circulating the band saw blade by continuous rotation of a drive wheel and a driven wheel, and a conveyor unit arranged in a vertical direction of the tip of the band saw blade facing the work and for receiving, accumulating, or discharging chips generated during cutting processing, operating the conveyor unit to discharge the contained and accumulated chips when the pivot member is at a first pivot angle; stopping operation of the conveyor unit to receive and accumulate chips when the pivot member is at a second pivot angle different from the first pivot angle; How to dispose of chips from a band saw.

2. When the workpiece has a longitudinal shape, 2. A method for disposing of chips in a band saw as claimed in claim 1, wherein the first rotation angle is set to a position at which the workpiece is cut in a direction perpendicular to the longitudinal direction of the workpiece.

3. The volume of chips that can be accumulated in the conveyor unit is previously determined as an allowable chip cumulative volume, A volume of chips generated in a subsequent machining process is estimated, and the estimated volume of chips is compared with the allowable cumulative volume of chips.

3. A method for processing chips in a band saw machine according to claim 1, further comprising the step of determining whether or not to operate the conveyor unit to discharge the stored chips before the next machining operation is performed, depending on the result of the comparison.

4. A cutting head that circulates the band saw blade by continuous rotation using a drive wheel and a driven wheel, and a conveyor unit that is arranged in a vertical direction of the tip of the band saw blade facing the workpiece and operates to receive, accumulate, or discharge chips generated during cutting processing, and a rotating member that can rotate at a predetermined angle; A control unit for controlling the circulation of the band saw blade and the operation of the conveyor unit; Equipped with The control unit controls the conveyor unit to The band saw is controlled so that when the rotating member is at a first rotation angle, the rotating member operates to discharge the stored and accumulated chips, and when the rotating member is at a second rotation angle different from the first rotation angle, the band saw is stopped to store and accumulate the chips.

5. When the workpiece has a longitudinal shape, 5. The band saw according to claim 4, wherein the first pivot angle is a position at which the workpiece is cut in a direction perpendicular to the longitudinal direction of the workpiece.

6. The control unit has a memory unit and a chip amount estimation unit, The storage unit stores a volume of chips that can be accumulated in the conveyor unit, the volume being determined in advance, as an allowable chip cumulative volume, 6. The band saw machine according to claim 4, wherein the chip amount estimation unit estimates a chip volume amount generated in a next machining operation, and determines whether or not to operate the conveyor unit to collect and discharge the accumulated chips before performing the next machining operation depending on a result of comparing the estimated chip volume amount with the allowable chip accumulated volume.

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