JP2005246573A - Band saw type cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a band saw type cutting device surely cutting an workpiece. <P>SOLUTION: The band saw type cutting device 10 is composed by winding an endless band saw blade 32 around a pair of horizontally arranged sheaves 30, 30. The workpiece 12 is vertically cut by lowering a pair of the sheaves 30, 30 while circumferentially traveling the band saw blade 32 by rotating the sheave 30. Guide rails 44, 44 are horizontally extended from the lower region of the band saw blade 32. A table 42 is freely slidably supported by the guide rails 44, 44. The table 42 is formed by the inclination of a laying plate 56 on which the workpiece 12 is laid. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a band saw type cutting device, and more particularly to a band saw type cutting device for cutting and dismantling large equipment such as a heat exchanger in a nuclear power plant.

At a nuclear power plant, a heat exchanger is cut and disassembled using a band saw type cutting device. The band saw type cutting device is configured by winding an endless band saw blade around a pair of horizontally arranged sheaves (see Patent Document 1). According to this band saw type cutting device, the workpiece can be cut in the vertical direction by lowering the sheave and pressing the band saw blade against the workpiece while rotating the sheave and running the band saw blade. .
Patent No. 2967800

  However, the band saw type cutting device of Patent Document 1 has no problem when cutting a cylindrical or columnar workpiece, but the band saw blade may be disconnected when cutting a rectangular workpiece. is there. For example, when a band saw blade is pressed parallel to the upper surface of a rectangular workpiece, the workpiece cannot be cut smoothly and a large load is applied to the band saw blade, causing a break. There was a risk of it occurring.

  This invention is made | formed in view of such a situation, and it aims at providing the band saw type cutting device which can cut | disconnect a to-be-cut object reliably.

  In order to achieve the above object, the invention according to claim 1 includes a pair of horizontally disposed sheaves and an endless band saw blade wound around the pair of sheaves, and rotating the sheave to In a band saw type cutting device that cuts an object to be cut arranged in a lower region of the band saw blade by the band saw blade by lowering the sheave while rotating the band saw blade, the horizontal extending from the lower region is extended. A guide rail, a table that is slidably supported along the guide rail, and a mounting surface on which the workpiece is placed is inclined with respect to the horizontal direction, and the table is provided. And clamping means for clamping the object to be cut on the placement surface.

  According to the first aspect of the present invention, the object to be cut is placed on the table mounting surface outside the lower region of the band saw blade, and the object to be cut is clamped by the clamping means, and then the table is fixed. The object to be cut can be set in the lower region of the band saw blade by sliding along the guide rail. At this time, since the table mounting surface is inclined with respect to the horizontal direction, the object to be cut is set in an inclined state. Therefore, the cutting angle of the band saw blade with respect to the workpiece can be secured. Therefore, it can cut smoothly into a to-be-cut object with a band saw blade, and a to-be-cut object can be cut | disconnected safely and reliably.

  According to a second aspect of the present invention, in the first aspect of the present invention, an escape groove for the band saw blade is formed on the mounting surface of the table.

  According to invention of Claim 2, since the groove | channel is formed in the mounting surface of a table and the relief of a band saw blade is provided, the to-be-cut object on a mounting surface can be cut | disconnected completely.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the clamping means is provided for each cut piece of the workpiece to be cut by the band saw blade.

  According to the third aspect of the present invention, since each of the cut pieces of the object to be cut is held by the holding means, the object to be cut can be securely fixed during or after cutting. Therefore, it is possible to prevent the object to be cut from falling during or after cutting.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the table is provided with adjusting means for adjusting the angle of the mounting surface.

  According to the fourth aspect of the present invention, the cutting angle of the band saw blade with respect to the workpiece can be adjusted by adjusting the angle of the mounting surface. Therefore, it is possible to always ensure the cutting angle regardless of the shape of the workpiece.

  According to the band saw type cutting device according to the present invention, the workpiece can be set in the lower region of the band saw blade in an inclined state. Therefore, it can cut smoothly into a to-be-cut object with a band saw blade, and a to-be-cut object can be cut | disconnected safely and reliably.

  Hereinafter, preferred embodiments of a band saw type cutting device according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing the configuration of the band saw type cutting apparatus of the present embodiment. As shown in FIG. 1, the band saw type cutting apparatus 10 includes a cutting unit 14 and a conveyance unit 16. The workpiece 12 is conveyed by the conveyance unit 16 and set in the cutting unit 14. The object 12 is cut and disassembled in the vertical direction.

  The cutting part 14 has a main body frame 18, and the main body frame 18 has four columns 18 </ b> A, 18 </ b> A,. A substantially gate shape is formed by the frame 18B. Guide rails 20, 20 ... are attached to the outer side surfaces of the columns 18A, 18A ....

  A pair of elevating members 22, 22 are slidably supported on the guide rails 20, 20. The pair of elevating members 22 and 22 are disposed on the left and right sides of the main body frame 18 and are screwed to the feed screws 24 and 24 via the nut portions 22A and 22A. Each feed screw 24, 24 is arranged in the vertical direction, is rotatably supported by the main body frame 18, and is mechanically connected to the lifting / lowering motor 26. Accordingly, by driving the elevating motor 26, the feed screws 24, 24 rotate, and the pair of elevating members 22, 22 are raised and lowered in synchronization. In addition, you may make it connect a pair of raising / lowering members 22 and 22 with a connection beam.

  Sheaves 30 and 30 are provided on the lower surfaces of the pair of elevating members 22 and 22, respectively. Each sheave 30, 30 is horizontally arranged and supported so as to be rotatable about a vertical axis. An endless band saw blade 32 is wound around the pair of sheaves 30 and 30. The band saw blade 32 is held in a state where a predetermined tension is applied by the pair of sheaves 30, 30. In addition, adjustment of the tension | tensile_strength of the band saw blade 32 is performed by operating the handle | steering-wheel 34 attached to the raising / lowering member 22 of the back | inner side of FIG. By operating this handle 34, the sheave 30 slides and the interval between the pair of sheaves 30, 30 is adjusted, and the tension of the band saw blade 32 is adjusted.

  Of the pair of sheaves 30, 30, a cutting motor 36 is coupled to the front sheave 30 in FIG. 1. By driving the cutting motor 36, the sheave 30 rotates, and the band saw blade 32 travels between the pair of sheaves 30, 30.

  The cutting part 14 configured as described above cuts the workpiece 12 set in the lower region of the band saw blade 32 by lowering the elevating members 22 and 22 while traveling the band saw blade 32.

  On the other hand, the transport unit 16 mainly includes a pair of rail bases 40 and 40 and a table 42. The rail base 40 is disposed in parallel and extends forward from the lower region of the band saw blade 32 to the front of the apparatus. Guide rails 44 and 44 are respectively laid on the upper surfaces of the rail bases 40 and 40, and the table 42 is slidably supported along the guide rails 44 and 44.

  A nut portion 46 is provided on the lower surface of the table 42, and a feed screw 48 is screwed to the nut portion 46. The feed screw 48 is disposed in parallel with the guide rails 44 and 44. The feed screw 48 is rotatably supported at one end by a bearing 50 and connected to the motor 52 at the other end. Therefore, by driving the motor 52, the feed screw 48 rotates and the table 42 can be slid along the guide rails 44, 44. Thereby, the table 42 can be arranged in a region below the band saw blade 32 or in a region outside the lower region 32 (hereinafter referred to as a work region).

  The table 42 includes a base 54 and a placement plate 56. 2 is a plan view of the table 42, and FIG. 3 is a cross-sectional view of the table 42 taken along the line 3-3 in FIG.

  As shown in these drawings, the base 54 is formed in a rectangular shape and is disposed horizontally. The base 54 is slidably supported by the above-described guide race 44 and is screwed to the feed screw 48 via the nut portion 46.

  Further, stoppers 58 and 58 are screwed into the base 54. By rotating the levers 58A and 58A attached to the upper ends of the stoppers 58 and 58, the stoppers 58 and 58 are lowered to come into contact with the rail bases 40 and 40, so that the base 54 is fixed. Yes. Thereby, the mounting operation | work and cutting operation | work mentioned later can be performed safely.

  On the other hand, the mounting plate 56 is formed in a rectangular shape and supported by the base 54 via a plurality of support columns 60, 60. The mounting plate 56 is supported with a slight inclination angle with respect to the horizontal direction. The inclination angle may be, for example, an inclination of about 1 mm in the vertical direction with respect to 25 to 30 mm in the horizontal direction.

  On the upper surface of the mounting plate 56, three traveling grooves 62, 62, 62 and two escape grooves 64, 64 are formed alternately and in parallel. The interval D between the escape grooves 64 and 64 is formed with the same dimension as the diameter of the sheave 30 (that is, the interval between the band saw blades 32 and 32). Further, the relief grooves 64, 64 are arranged directly below the band saw blade 32 when the table 42 is arranged in the lower region of the band saw blade 32.

  On the other hand, a rail 66 is laid in each running groove 62, and a piece member 68 is slidably supported along the rail 66. A hydraulic cylinder 70 is installed in the traveling groove 62, and a piece member 68 is connected to a rod 70 </ b> A of the hydraulic cylinder 70. A column 72 is erected on the piece member 68, and the movable holding plate 74 is supported on the column 72. Therefore, when the hydraulic cylinder 70 is driven, the movable holding plate 74 is slid through the piece member 68.

  Near the end of each running groove 62, a fixed clamping plate 76 is provided. The fixed clamping plate 76 is erected in a state where the stationary clamping plate 76 is divided into two with the traveling groove 62 interposed therebetween. Therefore, the distance between the movable clamping plate 74 and the fixed clamping plate 76 can be adjusted by sliding the movable clamping plate 74 described above along the traveling groove 62. Therefore, the workpiece 12 can be clamped and fixed by the movable clamping plate 74 and the fixed clamping plate 76.

  3 is a collection container and is detachably attached between the base 54 and the mounting plate 56. As shown in FIG. 2, the collection container 80 is disposed below the escape groove 64, so that chips and the like can be collected in the collection container 80 when the workpiece 12 is cut by the band saw blade 32. . Moreover, the liquid substance etc. which were accumulate | stored inside the to-be-cut object 12 can also be collect | recovered.

  Next, the operation of the band saw type cutting apparatus 10 configured as described above will be described.

  FIG. 4 is a side view for explaining the conveying work of the workpiece 12, and FIG. 5 is a front view of the band saw type cutting apparatus 10 during the cutting work.

  First, as shown on the left side of FIG. 4, the table 42 is placed at the work position. At this time, the interval between the fixed clamping plate 76 and the movable clamping plate 74 is widened.

  Next, the suspension jig 82 is attached to the upper part of the workpiece 12 by welding or embedding. Then, the suspension jig 82 is suspended by a hook 84 of a suspension device, the workpiece 12 is conveyed, and the workpiece 12 is placed on the placement plate 56 of the table 42. As shown in FIG. 5, the suspension jig 82 is preferably disposed between two cutting lines by the band saw blade 32, so that the suspension jig 82 can be removed without removing the suspension jig 82. The cut article 12 can be cut.

  Next, each movable clamping plate 74 is moved to each fixed clamping plate 76 side by driving the hydraulic cylinder 70 (see FIG. 2) of the mounting plate 56. Thereby, the workpiece 12 can be clamped and fixed between the three pairs of fixed clamping plates 76 and the movable clamping plate 74.

  Next, by driving the motor 52 of FIG. 4, the table 42 is moved to the right along the guide rail 44 and is arranged in the lower region of the band saw blade 32. As a result, the relief groove 64 of the mounting plate 56 is disposed directly below the band saw blade 32, and the workpiece 12 is set at the cutting position. At this time, the workpiece 12 is set in a state of being inclined with respect to the horizontal plane as shown in FIG.

  Next, a fixing jig 86 is attached to the upper part of the workpiece 12. Then, the fixing jig 86 is fixed to the main body frame 18 and the table 42 via the string 88. Thereby, it can prevent that the to-be-cut object 12 rolls at the time of a cutting operation. In addition, it is good to provide a hook in the mounting plate 56, the fixed clamping plate 76, the movable clamping plate 74, etc. as an engaging part for hooking the string 88 on the table 42.

  By the above, the conveyance work of the to-be-cut object 12 is complete | finished, and then a cutting work is performed. In the cutting operation, first, the cutting motor 36 is driven to run the band saw blade 32. Next, the elevating motor 26 is driven to lower the pair of sheaves 30, 30 and press the band saw blade 32 against the workpiece 12. At this time, since the band saw blade 32 is pressed against the workpiece 12 while maintaining a horizontal state, a predetermined cutting angle is ensured with respect to the workpiece 12 inclined and fixed. Therefore, it is possible to smoothly cut the workpiece 12.

  When the pair of sheaves 30 and 30 are further lowered, the band saw blade 32 moves along a cutting line indicated by a two-dot chain line in FIG. When the band saw blade 32 is lowered to the position of the mounting plate 56, the band saw blade 32 enters the escape groove 62. Therefore, the workpiece 12 on the mounting plate 56 can be completely cut without damaging the mounting plate 56. Thereby, the to-be-cut object 12 is cut | disconnected and divided into three.

  Each of the three cut pieces of the object to be cut 12 is fixed by a fixed holding plate 76 and a moving holding plate 74. Therefore, it is possible to prevent each cut piece of the workpiece 12 from falling.

  After the cutting work is completed, the table 42 is moved again to the work area. And after extending the space | interval of the movable clamping board 74 and the fixed clamping board 76, each cut piece of the to-be-cut object 12 is carried out from the table 42. FIG. Thereby, the dismantling work of the workpiece 12 is completed.

  As described above, according to the present embodiment, the work piece 12 is fixed obliquely by arranging the mounting plate 56 of the table 42 obliquely, so that the cutting of the band saw blade 32 with respect to the work piece 12 is performed. The insertion angle can be secured, and the workpiece 12 can be cut safely and reliably.

  Further, according to the present embodiment, since the table 42 slides between the lower region of the band saw blade 32 and the work region outside the band saw blade 32, work such as installation and fixing of the workpiece 12 in the work region. It is possible to set the workpiece 12 in the lower region of the band saw blade 32 simply by sliding in this state. Therefore, since it is not necessary to perform the work of fixing the workpiece 12 in the lower region of the band saw blade 32, the preparation work for cutting can be easily performed.

  Furthermore, according to the present embodiment, the fixed holding plate 76 and the moving holding plate 74 are provided and fixed to each cut piece of the cut object 12, so that it can be held during or after cutting. The workpiece 12 can be securely fixed.

  In the above-described embodiment, the mounting plate 56 is tilted in advance and fixed to the base 54. However, the present invention is not limited to this, and the mounting plate 56 can be swingably provided on the base 54 to adjust the angle. You may do it. For example, in the table 90 shown in FIG. 6, a bearing 92 is erected on one end of a base 54, and a mounting plate 56 is supported in a swingable manner via a rotating shaft 94 supported by the bearing 92. Yes. A hydraulic cylinder 96 is attached to the other end of the base 54 so as to face upward, and the tip of the rod 96A of the hydraulic cylinder 96 is rotatably supported by the mounting plate 56. Therefore, the mounting plate 56 can be swung by driving the hydraulic cylinder 96, and the angle of the mounting plate 56 can be adjusted. Thereby, the mounting plate 56 can be leveled or tilted, and the tilt angle can be adjusted.

  The table 90 shown in FIG. 6 includes a vertically long fixed holding member 98 and a moving holding member 99, and the fixed holding member 98 and the moving holding member 99 can hold up to the upper part of the workpiece 12. Yes. Therefore, the workpiece 12 can be fixed in a more stable state.

  Since the table 90 configured as described above can adjust the inclination angle of the mounting plate 56, the cutting angle can be changed according to the shape and material of the workpiece 12. In addition, the table 90 can be operated more safely by placing the workpiece 12 with the placement plate 56 being horizontal. Further, since the table 90 is configured to clamp the workpiece 12 by the vertically long fixed clamping member 98 and the vertically long movable clamping member 99, the workpiece is cut even when the workpiece 12 is cylindrical or cylindrical. 12 can be clamped.

  In the above-described embodiment, the workpiece 12 is fixed by the fixed clamping plate 76 and the movable clamping plate 74, or the fixed clamping member 98 and the movable clamping member 99, but the clamping means for the workpiece 12 is not limited. The structure is not limited to this, and the workpiece 12 may be clamped by moving both clamping members.

The perspective view which shows the structure of embodiment of the band saw type cutting device which concerns on this invention. The top view which shows the table of FIG. Sectional view along line 3-3 in FIG. Side view explaining the work of conveying the workpiece Front view explaining the cutting work of the workpiece Sectional drawing which shows the table of a structure different from FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Band saw type cutting device, 12 ... Cut object, 14 ... Cutting part, 16 ... Conveying part, 30 ... Sheave, 32 ... Band saw blade, 42 ... Table, 44 ... Guide rail, 48 ... Feed screw, 52 ... Motor, 64 ... Escape groove, 74 ... Moving clamping plate, 76 ... Fixed clamping plate

Claims (4)

A pair of horizontally disposed sheaves and an endless band saw blade wound around the pair of sheaves, and rotating the sheave to move the band saw blade around while lowering the sheave, In a band saw type cutting device for cutting an object to be cut arranged in a lower region of the band saw blade with the band saw blade,
A guide rail extending horizontally from the lower region;
A table that is slidably supported along the guide rail, and a mounting surface on which the object to be cut is mounted is inclined with respect to a horizontal direction;
Clamping means provided on the table, for clamping the workpiece on the placement surface;
A band saw-type cutting device comprising:   The band saw type cutting device according to claim 1, wherein a relief groove of the band saw blade is formed on the mounting surface of the table.   The band saw-type cutting device according to claim 1 or 2, wherein the clamping means is provided for each piece of a workpiece to be cut by the band saw blade.   The band saw type cutting device according to any one of claims 1 to 3, wherein the table is provided with adjusting means for adjusting the angle of the mounting surface.

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