JP4560071B2 - Profile processing method - Google Patents

Description

  The present invention relates to a shape processing method for removing a joint convex portion remaining on the surface of a shape when a plurality of shapes are joined by welding, friction stir welding, or the like, and processing the shape surface smoothly.

  Examples of the shape processed by the shape processing apparatus include an extruded shape made of aluminum alloy (hereinafter simply referred to as an extruded shape). Some of the extruded shape members have a flat cross section having a rib or a hollow cross section. Note that. A structure in which flat plates produced by rolling are butted and joined by welding may be processed by the shape processing apparatus. As a product manufactured by the extruded shape member, there is a railway vehicle structure. The railway vehicle structure is composed of a frame, a side structure, a roof structure, and a wife structure. The side structure is manufactured by arranging a plurality of extruded shapes along the longitudinal direction of the side structure and arranging these extruded shapes side by side in the width direction of the side structure. The plurality of extruded shapes arranged in the width direction of the side structure are joined to each other by welding or friction stir welding. The roof structure or underframe is also manufactured in substantially the same manner as the side structure. When the adjacent extruded shapes are welded, MIG welding is usually used, and a weld bead protruding from the surface of the extruded shape is formed at the joint portion. In addition, when the adjacent extruded shapes are subjected to friction stir welding, a convex portion is formed in advance on the surface of the joint portion of each extruded shape member, and the convex portions of the two shaped shapes that are abutted are formed using a friction stir welding tool. It is joined. A part of the convex portions of the two butted members that have been butted together is cut away by the friction stir welding tool, but a portion that is not cut off remains, and the surface of the extruded shape member immediately after joining is not smooth. Thus, when a plurality of extruded shape members are butt-joined by welding or friction stir welding or the like, protruding joint protrusions remain on the surface of the extruded shape member. The joint convex portion on the surface of the extruded shape member was processed smoothly by a manual operation using a grinder.

  Since the smoothing operation of the extruded shape member surface is a manual operation using a grinder, the operation is complicated. Moreover, in the said conventional smoothing operation | work, grinding had to be performed in consideration of the final finishing surface of an extruded shape member, and it was an operation | work which requires skill. In addition, the conventional smoothing operation requires a great amount of time and generates grinding powder, so that it is difficult to say that the working environment is good.

  [Patent Document 1] is known as an example of performing surface processing of a plate material by a mechanical device separately from the surface smoothing operation of the extruded shape member by the grinder. [Patent Document 1] is a deburring machine for deburring a hollow portion by a turret punch or the like. In this deburring machine, no consideration is given to efficiently finishing the joint protrusions continuously formed on the surface of the extruded shape member in a short time.

On the other hand, [Patent Document 2] can be cited as an example in which a cutting device that cuts the bonding convex portion is provided behind the friction stir welding tool when a plurality of extruded shapes are joined by friction stir welding. In this cutting apparatus, an example of an end mill is shown as a cutting tool. When cutting the joint convex portion by an end mill, it has been difficult to perform cutting while accurately moving the end mill tip along the surface of the extruded shape member. That is, the side structure formed by joining a plurality of extruded shapes has a long length of about 17 m to 25 m and a width of about 3 m. When the side structure is constrained and the cutting is performed, a large-scale and highly accurate restraining device is required to keep the surface of the side structure in a flat state. Further, a complicated control mechanism is required to move a cutting means such as an end mill for cutting the joint convex portion on the side structure surface so as to accurately follow and move the surface of the side structure. For this reason, when automatically cutting the joint convex portion such as the side structure, it has been necessary to perform machining while leaving a machining allowance for finishing in consideration of cutting accuracy. Note that the cutting allowance remaining on the surface of the extruded shape member must be finished by manual work using a grinder as described above.
JP 2000-158310 A Japanese Patent No. 3070735

  An object of the present invention is to cut a bonding convex portion formed on the surface of a shape member by welding or friction stir welding in a short time and with high accuracy.

  The object of the present invention is to join a plurality of shapes, position and constrain a shape in which joining projections are continuously formed on the surface of the joining portion in the longitudinal direction of the shape, and the center of the milling cutter in the width direction. A slice cutter device provided with a milling surface curved so that the portion swells to the shape member side is arranged so that the joining convex portion of the shape member can be cut, and the milling surface at the center portion in the width direction of the milling cutter is joined to the joining surface. In a state where it coincides with one end portion in the width direction of the convex portion, the joint convex portion is cut in the longitudinal direction of the profile, and then the milling surface of the center portion in the width direction of the milling cutter is It can be achieved by a shape processing method characterized by cutting the joint convex portion in the longitudinal direction of the shape in a state where it coincides with the other end in the width direction.

  The present invention will be described below with reference to FIGS. FIG. 1 is a front view showing an embodiment of a profile processing apparatus according to the present invention. 2 and 3 are front views showing a state in which the side structure is positioned and restrained in the shape processing apparatus shown in FIG. 4 and 5 are explanatory views of a drive portion of the milling cutter device. 6, 7 and 8 are explanatory views of the polishing apparatus. FIG. 9 is an explanatory view showing a detailed structure of the milling cutter of the milling cutter device.

  In FIG. 1, the side structure 8 is placed and restrained on the shape processing apparatus with the vehicle outer surface facing upward. A plurality of mounts 11 are installed on the bed 10 at a predetermined interval (for example, an interval of about 1 m to 2 m) in the longitudinal direction of the side structure 8 (hereinafter referred to as the X-axis direction). Each gantry 11 is arranged with its longitudinal direction facing the width direction of the side structure 8 (hereinafter referred to as the Y-axis direction). The total length of each gantry 11 is longer than the width dimension of the side structure 8. A support base 30, a support base 40 and a support base 60 are attached to the upper surface of each base 11. The side structure 8 has a curved cross-sectional shape so as to bulge upward when viewed from the X-axis direction. In FIG. 1, the left end of the side structure 8, that is, the upper part connected to the roof structure when the vehicle body is configured is supported by the support base 30. The right end of the side structure 8, that is, the lower part connected to the underframe when the vehicle body is configured, is supported by the support base 40. The side structure 8 is supported by a support base 60 at the intermediate portion in the Y-axis direction. The support 30, the support 40, and the support 60 installed on the plurality of mounts 11 support the load of the side structure 8 itself and the load when processing the surface thereof.

  The upper side portion of the side structure 8 has a shape curved inward in the width direction of the vehicle body as shown in FIG. The support base 30 includes a pressing tool 31 having a curved support surface coinciding with a curved vehicle outer surface on the upper side of the side structure 8. In a state where the curved support surface of the pressing tool 31 is pressed against the outer surface of the side structure 8, the pressing tool 31 is fixed to the support base 30 by the fixing tool 32. The pressing tool 31 presses the side structure 8 against the horizontal support surface of the support 30 and also presses the side structure 8 toward the support 40. The support base 30 is fixed to the gantry 11 by fixing means such as bolts. The curved support surface of the pressing tool 31 is configured in a shape that matches the shape of the restrained member, for example, the outer surface of the vehicle such as the side structure or the roof structure. A backing plate such as an aluminum alloy plate is installed between the support surface of the support base 30 and the side structure 8. This backing plate is installed so as not to damage the side structure 8.

  The support base 40 includes a support tool 41 a having an L-shaped support surface that supports the lower side portion of the side structure 8. The support tool 41 a is placed on the mounting table 41. The support 41a is moved by the pusher 43 so as to be movable forward and backward in the Y-axis direction on the mounting table 41. The support tool 41a is made of an aluminum alloy, and consideration is given so as not to damage the side structure 8. The support tool 41 a receives the side structure 8 that is pressed toward the support base 40 by the pressing tool 31. Positioning of the side structure 8 in the Y-axis direction is performed by the pressing tool 31 and the support tool 41a. The side structure 8 is pressed against the support tool 41a from above by a pressing link 42. The presser link 42 is installed on the platform 41. The platform 41 is supported by a screw jack 44 so as to be movable in the vertical direction. The height of the platform 41 is adjusted by a screw jack 44. The screw jack 44 includes a screw rod 46 arranged vertically, and a platform 41 is installed on the upper end of the screw rod 46. The screw jacks 44 are respectively installed on a plurality of installation bases 11. Each screw jack 44 installed on each pedestal 11 is connected by a connecting shaft 45, and by driving this connecting shaft 45, the height of each mounting base 41 is adjusted in conjunction with each screw jack 44. To do. The connecting shaft 45 is provided with a worm gear and meshes with a worm wheel constituting the screw jack 44. The screw rod 46 is screwed into the worm wheel. Accordingly, when the connecting shaft 45 is rotated, the worm wheel is rotated by the worm gear to raise and lower the screw rod 46. The connecting shaft 45 is installed over substantially the entire length of the bed 10, and the electric motor that drives the connecting shaft 45 is installed adjacent to a screw jack at a substantially central position in the X-axis direction of the bed 10. Yes.

  A guide rod 47 is installed in parallel to the screw rod 46, and the platform 41 is fixed to the upper end of the guide rod 47. The guide rod 47 is supported by a guide 48 so as to be slidable in the vertical direction, and has a function of guiding the screw rod 46 in the vertical direction.

  The screw jack 44 and the guide 48 are installed on the movable table 50 and constitute a support table 40. The moving table 50 is installed on the gantry 11 so as to be movable in the Y-axis direction. The telescopic device 52 moves the moving base 50 in the Y-axis direction and adjusts the position of the support base 40 according to the width dimension of the side structure 8. The expansion and contraction device 52 includes a screw jack and is installed on each of the plurality of mounts 11. Each telescopic device 52 installed on each gantry 11 is connected by an interlocking shaft 53. By driving the interlocking shaft 53, the expansion and contraction devices 52 are interlocked similarly to the screw jack 44 to adjust the position of each support base 40 in the Y-axis direction.

  The support base 60 is installed on each of the plurality of mounts 11 and supports the side structure 8 from the inside of the vehicle. The support table 60 is installed between the support table 30 and the support table 40. The support base 60 has the same basic structure as the support base 40, and a support 61 a is installed on the mounting base 61. In the side structure 8, the joint portion of the plurality of extruded shapes has a higher strength than the other portions. The support tool 61a supports the joints of a plurality of extruded shapes constituting the side structure 8 from the vehicle interior side. The platform 61 is supported by a screw rod 66 and a guide rod 67 so as to be movable up and down. The screw rod 66 constitutes a screw jack 64, and the screw jack 64 is connected to the screw jack 64 of the adjacent support base 60 by a connecting shaft 65. The guide rod 67 is supported by a guide 68 so as to be slidable in the vertical direction, and has a function of guiding the screw rod 66 in the vertical direction. The screw jack 64 and the guide 68 are installed on the moving table 70 and constitute a support table 60. The moving table 70 is installed on the gantry 11 so as to be movable in the Y-axis direction. The position of the moving table 70 in the Y-axis direction is adjusted by an expansion / contraction device 72 incorporating a screw jack. The expansion / contraction device 72 is connected to the expansion / contraction device 72 of the adjacent moving table 70 by an interlocking shaft 73.

  Next, processing means for cutting and polishing the outer surface of the side structure 8 will be described. In FIG. 1, rails 101 are respectively installed along the X-axis direction on the upper surface of the bed 10 and on both sides in the longitudinal direction of each gantry 11, that is, in the Y-axis direction. The traveling body 100 travels on the two rails 101 in the X-axis direction. The traveling body 100 includes two legs 102 arranged on both sides in the Y-axis direction and a girder 103 that connects these legs 102. The girder 103 is arranged with its longitudinal direction along the Y-axis direction. Four columns 105 are installed in the girder 103, and the columns 105 are installed so as to be movable in the Y-axis direction with respect to the girder 103. Each column 105 is provided with a milling cutter device 80 and a polishing device 90. Each column 105 is arranged in the Y-axis direction of the girder 103 so as to coincide with the joining position of the workpiece restrained on the gantry 11, for example, the extruded shape member of the side structure 8. Each column 105 is installed so as to be movable up and down with respect to the girder 103. Each column 105 is provided with the milling cutter device 80 and the polishing device 90 at the lower end thereof. Each column 105 is positioned so as to be in an optimum position when the milling cutter device 80 and the polishing device 90 process the vehicle outer surface of the side structure 8. The milling cutter device 80 and the polishing device 90 set in each column 105 are arranged in the X-axis direction, and are arranged along the joining line of the extruded shape member of the side structure 8. The milling cutter device 80 and the polishing device 90 are installed to be rotatable about a vertical axis with respect to the column 105. Therefore, the arrangement of the milling cutter device 80 and the polishing device 90 can be switched according to the movement state of the traveling body 100 in the X-axis direction. The position adjustment of each column 105 in the Y-axis direction is performed by detecting a joint convex portion of the side structure 8 by an optical sensor, and processing positions of a milling cutter device 80 and a polishing device 90 described below with respect to the joint convex portion. It is done by automatic control to match.

  In addition, the joint convex part of the side structure 8 comprised with an extruded shape member exists in the predetermined position of the Y-axis direction, and is extended continuously in the X-axis direction. Therefore, the position of the column 105 in the Y-axis direction may be adjusted manually without using the optical sensor. Alternatively, the position data in the Y-axis direction of the joint convex portion of the side structure 8 may be stored in the control device in advance, and the position of the column 105 in the Y-axis direction may be adjusted based on this position data.

  Further, the milling cutter device 80 and the polishing device 90 are supported by inclined columns 105b and 105d installed so as to be inclined with respect to the column 105 about the X-axis direction as a rotation center. The upper side portion of the side structure 8, that is, the left side portion in FIG. 1 has a shape curved toward the center of the vehicle body, and the milling surface of the milling cutter device 80 is in contact with the tangent to the surface of the curved portion of the side structure 8. The support structure can match the polishing surface of the polishing apparatus 90.

  In this embodiment, four columns 105 are installed in the Y-axis direction. However, the columns 105 may be installed in accordance with the joining position of the side structure 8 that is a workpiece. It is not limited to examples.

  Next, the detailed structure of the milling cutter device 80 will be described. As shown in FIGS. 4 and 5, the milling cutter device 80 is installed on the inclined column 105b so that the inclination of the milling surface can be changed in accordance with the inclination of the surface of the workpiece. The inclined column 105b is supported by an inclined rotation shaft 105c having the rotation axis center arranged in the X-axis direction. The milling cutter device 80 mainly includes a milling cutter 81, an electric motor 82 that drives the milling cutter 81, and a cylinder device 89 that adjusts the height of the milling cutter 81. A pulley 81 a is installed at one end of the rotating shaft 81 b that supports the milling cutter 81. A timing belt 83 is installed between a pulley 82a installed on the rotating shaft of the electric motor 82 and the pulley 81a. The rotating shaft 81b and the electric motor 82 are installed on a slide frame 84, and the slide frame 84 is installed to be slidable in the vertical direction with respect to the inclined column 105b. A cylinder device 89 is installed at the upper end portion of the inclined column 105 b, and the slide frame 84 is attached to the tip of the telescopic shaft of the cylinder device 89. By moving the slide frame 84 up and down by the cylinder device 89, the position of the milling cutter 81 is adjusted with respect to the side structure 8 which is a workpiece. The milling cutter 81 is pressed against the workpiece by the weight of each member installed on the slide frame 84 to perform cutting. The pressing force of the milling cutter 81 at this time is adjusted by adjusting the pressure of the compressed air supplied to the cylinder device 89.

  A support arm 81 c that supports the rotating shaft 81 b on which the milling cutter 81 is installed is installed at the lower end portion of the slide frame 84. On the bottom surface of the support arm 81c, sliding plates 85 are installed on both sides in the axial direction of the milling cutter 81, respectively. The sliding plate 85 has a predetermined length in the X-axis direction. When the surface of the side structure 8 is cut by the milling cutter 81, the distance between the milling cutter 81 and the processing surface is kept constant. Is. In addition, a dust collecting cover 86 that covers the periphery of the milling cutter 81 is installed on the support arm 81c. The dust collection cover 86 is provided with a connection cylinder 86 connected to the dust collection duct. Chips obtained when the joining convex portion on the surface of the side structure 8 is cut by the milling cutter 81 are sucked by the dust collector installed in the dust collecting duct.

  Next, the relationship between the milling cutter 81 and the side structure 8 of the workpiece will be described with reference to FIGS. 9 (a) and 9 (b). An example of the side structure 8 shown in FIG. 9 is a joint portion in which two extruded shapes 8C and 8D are joined by friction stir welding. At the abutting portions of the two extruded shape members 8C and 8D, a joint convex portion 8B is formed on the surface of the vehicle body, and the joint convex portion 8B remains after joining as shown in FIG. 9 (a). There is. Note that the surfaces in the Y-axis direction of the extruded shape members 8C and 8D shown in FIG. 9 are substantially flat except for the joint convex portions.

  FIGS. 9A and 9B show a state in which the milling cutter 81 is viewed from the X-axis direction. The milling surface for cutting the milling cutter 81 is formed in an arc shape, and the center of the arc is at the center of the milling cutter 81 in the width direction, that is, the Y-axis direction. The radius of the arc portion is, for example, about 800 mm. Therefore, the milling surface has a smaller diameter at both side portions in the width direction of the milling cutter 81 than at the central portion. The milling cutter 81 can tilt its rotation axis by θ1 (+ 0.3 °) and θ2 (−0.3 °) with respect to the surface of the side structure 8. That is, the milling cutter device 80 is tilted by rotating the tilt column 105b with respect to the tilt rotation shaft 105c, and the milling surface of the milling cutter 81 is tilted. This inclination angle is determined by the size of the radius of the arc portion of the milling surface. The tilt center when the milling cutter 81 is tilted is on the extruded shape member 8C, 8D side. For this reason, by tilting the milling cutter 81 by θ1 or θ2, the cutting position cut by the milling cutter 81 moves in the Y-axis direction.

  Sliding plates 85 are installed on both sides of the milling cutter 81 in the Y-axis direction, and when the milling cutter 81 is tilted, one sliding plate 85 comes into contact with the extruded shape member 8C or 8D. Yes. For example, as shown in FIG. 9A, when the milling cutter 81 is tilted by θ1 toward the extruded shape member 8D, the left sliding plate 85 in the drawing contacts the surface of the extruded shape member 8D, and the milling surface and The structure keeps the distance from the extruded shape. As shown in FIG. 9 (b), when the milling cutter 81 is inclined by θ2 toward the extruded shape member 8C, the opposite sliding plate 85 contacts the surface of the extruded shape member 8C. And the uncut part which remained by the cutting operation of Fig.9 (a) is cut. Therefore, the two sliding plates 85 are inclined with respect to the rotation center line of the milling cutter 81 at the contact surface with the extruded shape member. Further, each sliding plate 85 is arranged so as to contact the surface of the extruded shape member and keep the cutting depth of the milling cutter 81 constant when the milling cutter 81 is in a state of cutting the joint convex portion 8B. . By the sliding plates 85, the milling cutter 81 does not cut the joint convex portions of the extruded shape members 8C and 8D deeper than necessary.

  The width of the milling cutter 81 is configured to be slightly wider than the width dimension L1 of the joint projection. A small gap is provided between the milling cutter 81 and each sliding plate 85. Although the milling cutter 81 is configured to have a width wider than the bonding convex portion, as shown in FIGS. The entire convex portion cannot be cut. Therefore, the milling cutter 81 cuts the entire joint protrusion by reciprocating once in the X-axis direction. In the state of FIG. 9A, since the cutting portion of the joint convex portion is large, cutting is performed by up-cut processing of the milling cutter 81. In the state of FIG. 9B, since the uncut portion of the joint convex portion is small, cutting is performed by down-cut processing of the milling cutter 81, and the moving speed in the X-axis direction is increased. In this way, the joint projection is cut by reciprocating the milling cutter 81 in the X-axis direction. In the state shown in FIG. 9B, the X-axis direction moving speed is increased to shorten the cutting time. ing.

  By the way, the milling cutter 81 has been described as an example in which the surfaces of the extruded shape members 8C and 8D are substantially flat. However, in the side structure 8, the surface of the vehicle body in the cross section in the Y-axis direction protrudes to the outside of the vehicle. Some parts have curved surfaces. In the joint portion between the extruded shapes having curved surfaces as described above, the milling surface of the milling cutter may be formed parallel to the rotation center axis. Even in this case, the milling cutter is inclined (θ1 and θ2) for cutting. In addition, the milling cutter 81 has a single circular arc in the shape of the milling surface, but the center portion in the width direction of the milling cutter is an arc having a predetermined radius, and both end portions in the width direction are arcs having a smaller radius. Is also possible.

  As described above, the milling surface of the milling cutter 81 is configured to gradually move away from the surface of the extruded shape member relative to the surface of the extruded shape member to be cut as it goes in both directions in the Y-axis direction. Yes. For this reason, in the milling surface of the milling cutter 81, the center part in the width direction (Y-axis direction) of the milling cutter 81 cuts the surface of the extruded shape member deeply. Therefore, as described above, the milling cutter 81 is inclined, the sliding plates 85 installed on both sides of the milling cutter 81 are brought into contact with the extruded shape members 8C and 8D, and the distance between the milling cutter 81 and the extruded shape members 8C and 8D is set. Cutting while keeping constant. This can prevent the milling cutter 81 from cutting the surfaces of the extruded shape members 8C and 8D deeper than necessary. By cutting the joint convex portion in a state where the sliding plate 85 is in contact with the surface of the extruded shape member, the surface of the extruded shape member can be cut with high accuracy. Further, in the cutting process, since the milling cutter is made to follow the surface of the extruded shape member by the sliding plate 85, the cutting process is performed, so that no defect occurs even if this cutting operation is automated. By automating the cutting operation, the cutting time can be shortened and efficiently performed compared to the manual operation.

  On the other hand, if it is possible to move the milling cutter in the X-axis direction along the surface of the extruded shape without using the sliding plate 85, as described above, the Y-axis is not inclined without tilting the milling cutter. It is also possible to cut the joint projection on the surface of the extruded shape member by moving in the direction. For example, in the vicinity of the milling cutter, a contact type sensor for detecting the deflection of the surface of the extruded shape member or a contact type sensor using light is installed. By using the amount of deflection of the extruded shape surface detected by this sensor as the control input in the vertical direction of the milling cutter, the milling cutter is moved along the extruded shape surface. The milling surface of the milling cutter has a shape in which the central portion in the width direction swells to the extruded shape surface side than the both side portions in the width direction. The central portion and both side portions of the milling surface are connected by a gentle curved surface. Therefore, when cutting the joint convex part on the surface of the extruded shape member, cutting is performed with the center part in the width direction of the milling cutter aligned with one end part in the Y-axis direction of the joint convex part. At this time, since the uncut portion remains on the other end portion side in the Y-axis direction of the joint convex portion, the center portion in the width direction of the milling cutter is made to coincide with the other end portion of the joint convex portion, and this portion is cut. In this way, by moving the milling cutter in the Y-axis direction in correspondence with the width of the bonding convex portion, the bonding convex portion on the surface of the extruded shape member is cut. In this case, both ends in the Y-axis direction of the joint convex portion are completely cut at the center portion in the width direction of the milling cutter, so that no grooves or dents remain on the surface of the extruded shape member. In addition, since the milling cutter is gradually retracted at both sides in the width direction of the milling surface relative to the surface of the extruded shape member, a groove or a dent that is conspicuous in appearance is generated on the surface of the cutting portion. There is nothing. Therefore, by cutting with this milling cutter, the surface of the extruded shape can be processed with good appearance.

  Next, the detailed structure of the polishing apparatus 90 will be described with reference to FIGS. The polishing apparatus 90 is a belt type polishing apparatus using a polishing belt 91. The polishing apparatus 90 mainly includes a polishing belt 91, an electric motor 92, and a plurality of pulleys. Main parts including the electric motor 92 are attached to the slide frame 95. The slide frame 95 is attached to the inclined column 105d so as to be slidable in the vertical direction. A cylinder device 99 is installed at the upper end of the inclined column 105d, and the slide frame 95 is attached to the tip of the telescopic shaft of the cylinder device 99. By moving the slide frame 95 up and down by the cylinder device 99, the position of the polishing surface of the polishing belt 91 is adjusted with respect to the side structure 8 which is a workpiece. The endless polishing belt 91 is rotatably supported by pulleys 93a, 93b, and 93c arranged in a triangle when viewed from the Y-axis direction. The pulley 93a is provided with a driving pulley for receiving power from the electric motor 92. A timing belt 96 for transmitting a driving force is hung between the driving pulley and a pulley 94 installed in the electric motor 92. The polishing belt 91 forms a flat ground surface by pulling a triangular base formed by three pulleys by a pulley 93a and a pulley 93b. This ground surface extends at an angle described later in the X-axis direction of the side structure 8. Between the pulley 93a and the pulley 93b, presser pulleys 96a and 96b for pressing the polishing belt 91 against the processing surface of the side structure 8 that is a workpiece are installed. A dust collecting cover 97 is installed on the outer peripheral portion of the polishing belt 91. The dust collection cover 97 is provided with a connection cylinder 98 for connection to a dust collector and a dust collection duct.

  Next, the state of the polishing surface of the polishing belt 91 in the polishing apparatus 90 will be described with reference to FIG. In FIG. 8, the polishing belt 91 is pulled by the pulley 93a and the pulley 93b as described above. The direction in which the polishing belt 91 stretched by the two pulleys extends is inclined by an angle θ3 (about 10 °) with respect to the X-axis direction. The portion of the polishing belt 91 that is pressed against the side structure 8 by the pressing pulleys 96a and 96b forms a polishing surface. The width of this polished surface is L3, which is slightly wider than the machining width cut by the milling cutter device 80. Further, the width L3 of the polished surface is configured to be wider than the width L1 of the joint projection 8B of the side structure 8.

  Next, the processing situation of the side structure 8 by the shape processing machine will be described. First, as shown in FIGS. 1 to 3, the side structure 8 is positioned and restrained on the support bases 30, 40, 60 of the bases 11. Next, the traveling body 100 is disposed at the end of the side structure 8 in the X-axis direction, and each column 105 is disposed corresponding to the joining of the extruded shape members of the side structure 8. At this time, the inclination of the inclined column 105b of each column 105 is adjusted, and the milling surface of the milling cutter 81 is arranged so as to be inclined at an angle θ1 with respect to the bonding convex portion 8B on the surface of the extruded shape member. In this state, while the milling cutter 81 is rotated, the milling cutter 81 is lowered by the cylinder device 89, and cutting of the joint convex portion 8B is started. When one of the sliding plates 85 comes into contact with the surface of the extruded shape member, the lowering of the milling cutter 81 is stopped, the traveling body 100 is moved in the X-axis direction, and the joint projection 8B on the surface of the side structure 8 is cut.

  The milling cutter 91 has a milling surface formed in an arcuate shape, and performs cutting while being inclined by an angle θ1 with respect to the extruded shape member surface. For this reason, the cutting width of the milling cutter 91 is slightly narrower than the width L1 of the bonding convex portion. Therefore, as shown in FIG. 9A, the milling cutter 81 is brought close to one side (left side in the drawing) of the joint convex portion 8B, and cutting is performed mainly on the left side portion of the joint end portion 8B. In this state, the traveling body 100 travels in the X-axis direction from one end of the side structure 8 toward the other end. At this time, the milling cutter 81 cuts the joint convex portion by up-cut processing. When the traveling body 100 reaches the other end side of the side structure 8, the inclination of the milling cutter 81 is inclined to the opposite side by an angle θ2. Further, in a state where the cutting position of the milling cutter 81 is matched with the right end of the joint convex portion 8B, the traveling body 100 is caused to travel in the direction opposite to the previous direction, and the remaining portion of the joint convex portion 8B is cut. At this time, the sliding plate 85 located on the right side of the milling cutter 81 comes into contact with the surface of the extruded shape member, and the interval between the milling cutter 81 and the extruded shape member is kept constant. The milling cutter 81 cuts the right side portion of the joint convex portion 8B by down-cut processing. When the traveling body 100 reaches one end side of the side structure 8, the cutting of the joint convex portion 8B is completed.

  Next, the polishing apparatus 90 is positioned in a state where polishing can be performed on the joint convex portion 8B where the cutting has been completed. Then, the polishing belt 91 is rotated, the polishing surface is pressed against the surface of the extruded shape member, and polishing is performed while moving the traveling body 100 from one end of the side structure 8 to the other end. When the traveling body 100 reaches the other end side of the side structure 8, the joint protrusion is flat and processed with good appearance.

  In this way, the profile processing apparatus performs cutting and grinding of the joint convex portion of the side structure 8. Since the milling cutter 81 has a milling surface formed in an arc shape, the diameter of both end portions in the width direction is smaller than that in the center portion in the width direction. Therefore, in a normal cutting operation, since the surface of the workpiece is not cut by the end portion in the width direction of the milling surface of the milling cutter 81, a sharp groove may be formed on the surface of the workpiece. Absent. Therefore, when the joining convex portion is cut by the milling cutter 81, the appearance of the extruded shape member surface can be improved.

  The milling cutter 81 can completely remove the corners on both sides in the Y-axis direction of the joint convex portion 8B in order to remove the joint convex portion 8B at the butt portion of the two extruded shapes by two cutting processes. it can.

  By the way, the milling cutter 81 is an example in the case of performing a cutting process in which the surfaces of the extruded shape members 8C and 8D of the side structure 8 which is a workpiece are flat. The milling cutter installed in the leftmost column 105 shown in FIG. 1 has a configuration in which the milling surface is flat, that is, has a milling surface parallel to the rotation center axis of the milling cutter. The extruded shape member constituting the side structure 8 cut by the milling cutter is formed into a curved surface with a cross-sectional shape in the Y-axis direction protruding to the outside of the vehicle. Therefore, even if the milling surface of the milling cutter is flat, both end portions in the width direction of the milling surface are located farther from the surface of the extruded shape member than the center portion in the width direction. Therefore, the corner portion at the end in the width direction of the milling surface does not cut the extruded shape member surface. When the vehicle exterior surface of the side structure 8 is formed in a cross-sectional shape curved outward, the appearance of the extruded shape member surface can be prevented from being lowered even if the milling surface of the milling cutter is made flat.

  The joint protrusions of the plurality of extruded shapes constituting the side structure 8 extend in the X-axis direction. The polishing apparatus 90 performs polishing in a state where the longitudinal direction of the polishing surface of the polishing belt 91 is inclined at an angle θ3 with respect to the X-axis direction. Therefore, polishing is performed while the polishing surface of the polishing belt 91 moves in an oblique direction with respect to the bonding convex portion, and therefore, the polishing surface is not unevenly worn depending on the shape of the bonding convex portion. Since the polishing surface of the polishing belt 91 does not wear unevenly, the surface of the extruded shape can be polished evenly, and the appearance can be improved.

  As described above, the surface of the extruded shape member can be processed smoothly by cutting and polishing the joint convex portion of the extruded shape member by the milling cutter device and the polishing device shown in the embodiments of the present invention. Moreover, the groove | channel which reduces appearance is not formed in the surface of the said extrusion shape member. When a side structure is manufactured by the extruded shape member and the surface of the side structure is a non-painted hairline process, the appearance of the surface of the side structure can be improved.

  The milling cutter device and the polishing device are each provided with a dust collection cover, and the chips and dust are collected by the dust collector, so that the working environment can be prevented from deteriorating.

  According to the shape material processing apparatus described above, it is possible to cut and polish the joining convex portions formed when joining a plurality of shape materials in a short time and with high accuracy.

The front view which shows one Example of the profile processing apparatus of this invention. The front view which expanded and showed the support stand 30 of FIG. The front view which expanded and showed the support stand 40 and the support stand 50 of FIG. The front view of the milling cutter apparatus 80. FIG. The side view of the milling cutter apparatus 80. FIG. The side view of the polisher 90. FIG. The front view of the polisher 90. FIG. Explanatory drawing which showed the polishing surface of the polishing belt. Explanatory drawing which showed the cutting condition of the milling cutter 81. FIG.

Explanation of symbols

8 side structure 8B joint convex part 10 bed 11 mount 30,40,60 support stand 80 milling cutter device 85 sliding plate 90 polishing device

Claims (4)

Bonding and positioning a plurality of profiles and constraining the profile in which the bonding projections are continuously formed in the longitudinal direction of the profile on the surface of the joint,
Slicing cutter device provided with a milling surface curved so that the center part in the width direction of the milling cutter swells to the shape material side, the joint convex portion of the shape material is arranged so as to be cut,
In the state where the milling surface of the center portion in the width direction of the milling cutter is matched with one end portion in the width direction of the joint convex portion, the joint convex portion is cut in the longitudinal direction of the profile,
Next, in a state where the milling surface of the center portion in the width direction of the milling cutter is matched with the other end portion in the width direction of the joint convex portion, the joint convex portion is cut in the longitudinal direction of the profile,
The shape processing method characterized by this. The shape processing method according to claim 1, wherein the movement direction of the slice cutter device when cutting one end portion of the joint convex portion and the movement of the milling cutter device when cutting the other end portion of the joint convex portion. That the direction was reversed,
The shape processing method characterized by this. 2. The shape processing method according to claim 1, wherein the milling cutter device cuts one end portion of the joint convex portion of the shape member by up-cut processing and down-cuts the other end portion of the joint convex portion of the shape member. Cutting by machining,
The shape processing method characterized by this. In the shape processing method according to claim 1, after the cutting of one end and the other end of the joint projection of the shape is completed, the surface of the cut portion of the shape is polished.
The shape processing method characterized by this.

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