JP3868969B2 - Method and apparatus for chamfering the apex portion of a protruding column - Google Patents

Description

  The present invention relates to a method for chamfering a top corner portion of a projected corner column used as an exterior material of a projected corner portion of a building wall surface, and an apparatus therefor.

  An exterior corner column A as shown in FIG. 13 is known as an exterior material used for an exterior corner portion of a wall surface of a building (see Patent Document 1). As shown in FIG. 14a, a ceramic building board 1 having a surface handle portion 5 (FIG. 13) is usually used for manufacturing the protruding corner pillar A, and the board pieces 1a and 1a are cut into appropriate widths. And one side of each plate piece is cut obliquely (often at an angle of 45 degrees, but not limited to this) (FIG. 14b), and the cut surfaces 2 and 2 are cut at the apex 3 Each plate piece is joined with an adhesive so that the irregularities on the surface handle portion of the plate pieces match each other to form a substantially L-shaped cross section (FIG. 14c).

  At that time, the apex portion 3 may be misaligned or the adhesive may protrude from the apex portion. For the purpose of removing it, the apex portion 3 is chamfered by cutting with a tenoner cutting machine or the like. 8 is applied (FIG. 14d). The chamfer width is generally wide (about 10 mm to 20 mm) for safety.

  On the other hand, when the application amount of the adhesive is reduced, it is possible to prevent the adhesive from protruding. However, voids in which no adhesive is present are likely to occur at the joint, and it is necessary to put the voids by puttingty treatment or to chamfer the portion where the adhesive is embedded.

  In either case, in the conventional chamfering process, the chamfered portion (cutting surface 8) has a different color from the surface of the plate piece 1a. For example, an apparatus as described in Patent Document 1 is used. It is painted separately.

JP-A-11-188294

  As described above, in a conventional protruding corner column, a chamfering process with a wide width is performed on the apex corner portion using a device such as a tenoner cutting machine, and the chamfered processing portion has a wide width of about 10 mm to 20 mm. Because it is a flat surface, it is easily noticeable even if it is painted. As shown in FIGS. 15 and 16, plate corners 1 a and 1 a having an embossed pattern made up of a number of ridges 6 and grooves 7 running in the direction intersecting the joining surface are joined as the surface pattern portion. A may be formed. In this case, the distance a between the apexes of the adjacent ridges 6 and 6 is about 30 mm or less on average, and is often about 5 to 20 mm. Even in the protruding corner column A of this shape, the adhesives Pa and Pb protrude in the vicinity of the top of the ridge 6 and the vicinity of the bottom of the groove 7 as shown in the cross section in the axial direction of the joint in FIG. In order to remove the adhesive Pa that appears irregularly in the vicinity of the top of the ridge 6, chamfering is applied to the top corner 3 by mechanical means such as a tenoner cutting machine. At that time, although slightly different depending on the cross-sectional shape of the ridges 6, a chamfered processed portion 8, which is a flat surface forming a rhombus, is usually formed for each top of each ridge 6 as shown in FIG. 15. The

When daytime light strikes such a corner column attached as a corner material of the outer wall material, one surface of the ridge 6 formed on the left and right plate pieces 1a, 1a becomes a sunlight portion S, and the other surface is a shadow portion. It becomes D and brings out a three-dimensional feeling. However, the vertical angle portion 3 to the chamfered portion 8 of the rhombus is a flat surface as described above are present, a large sun area Sa becomes that part not only feel uncomfortable it will stand out by itself The shaded portion D of the ridge 6 in the left and right plate pieces is interrupted at that portion, and the continuity as a pattern is lost. This also loses the view of nature.

  Further, in the chamfering process by a mechanical means such as a tenoner cutting machine, the adhesive Pb protruding from the bottom of the concave groove 7 cannot be removed. In the case of a protruding corner column manufactured by joining plate pieces 1a and 1a having an embossed pattern composed of a large number of ridges 6 and grooves 7 running in the direction intersecting the joint surface, the number of grooves 7 is necessarily large. Thus, the amount of work for removing the adhesive Pb is enormous.

  The present invention has been made in view of the circumstances as described above, while reducing the work load in the production of the protruding corner column, while making the chamfered portion formed along the ridgeline of the apex corner as inconspicuous as possible, In addition, in the chamfered part, a shadow that is almost the same as the shadow formed on the surface handle part is formed, so that a protruding corner column is manufactured to prevent the chamfered part from causing a sense of incongruity. It is an object to provide a column chamfering method and a processing apparatus.

  The method for chamfering a corner of a projected corner column according to the present invention is a method of chamfering the projected corner column in the projected corner column formed by joining at least two plate pieces so that one side thereof has the vertex angle. In this chamfering method, a rotary cutting tool is used as a cutting tool, and the axial direction of the rotary cutting tool is intersected with the ridge line direction of the apex portion of the protruding corner column in a state where a constant load is applied to the rotary cutting tool. Chamfering the rotary cutting tool while moving it up and down so as to follow the irregularities formed on the ridgeline of the apex corner of the protruding corner column and making it contact with the apex corner of the protruding corner column as a direction It is characterized by processing.

  In the present invention, it is preferable to use a plate piece that constitutes the protruding corner pillar, which is cut from a conventionally known ceramic building board into a plate piece having an appropriate width, but is not limited thereto. A plate having an embossed pattern that runs in a direction intersecting the joining surface as exemplified in FIG. 15 as the surface handle, more specifically, a plurality of ridges and grooves that run in a direction perpendicular to the joining surface alternately. Although it is preferable to use a plate piece having an embossed pattern formed, the present invention is not limited to this, and a plate piece having a large flat surface pattern portion as shown in FIG. 13 may be used.

  According to the processing method of the present invention, the protruding corner column is moved relative to the rotary cutting tool in the ridge line direction of the apex corner. A constant load is applied to the rotary cutting tool. During the movement process, the rotary cutting tool is moved up and down in a manner that follows the irregularities formed on the ridgeline of the apex corner of the protruding corner column. While moving, the apex corner is cut (chamfered). Therefore, the chamfered portion has a narrow width, and has a shape that substantially follows the irregularities generated on the ridge line of the apex portion. As a result, the chamfered portion formed along the ridgeline of the apex portion is made as inconspicuous as possible, and the chamfered portion is also formed with a shadow substantially similar to the shadow formed on the surface handle, It is possible to easily manufacture a protruding corner column that does not cause a sense of incongruity in the chamfered portion.

  In the present invention, preferably, the magnitude of the load applied to the rotary cutting tool is adjusted in accordance with the wear state of the rotary cutting tool or the hardness of the protruding corner column to be processed. Thereby, stable chamfering can be performed at all times.

  In this invention, Preferably, the lowest point position of the rotary cutting tool which moves up and down is adjusted according to the protruding corner pillar which should be processed. In this way, by adjusting the lowest point position of the rotary cutting tool that moves up and down, the rotary cutting tool penetrates deeply into the concave groove of the protruding corner column of the protruding corner column at the time of cutting, and the protruding corner column does not stagnate. It is possible to smoothly move the upward slope from the concave groove to the convex line and perform copying.

  There may be one rotary cutting tool. However, two or more rotary cutting tools may be arranged and used in multiple stages along the ridge line direction of the apex portion of the protruding corner column to be processed. In this case, the necessary cutting amount can be shared by a plurality of rotary cutting tools, and as a result, the cutting load per one rotary cutting tool can be reduced, so that the cutting surface of the chamfered portion is smoother. Can be.

  When the rotary cutting tools are arranged in multiple stages, a rotary cutting tool including a cutting blade having a twist angle may be used as each cutting tool. When chamfering the apex corner using a rotary cutting tool that has a cutting blade that extends straight in the axial direction (that is, the torsion angle is 0 °), the load fluctuation that acts on the cutting blade increases and the cutting surface becomes minute. Unevenness (blade marks) may appear clearly. In this case, since the fine unevenness becomes an obstacle to the post-coating, it is necessary to remove it again by manual sanding or the like. However, the cutting blade of a rotary cutting tool equipped with a cutting blade having a helix angle is applied to the apex corner of the protruding corner column of the rotating cutting tool so that the axial direction intersects the ridgeline direction of the apex corner of the protruding corner column. When used in contact, load fluctuation during cutting is reduced, and a smooth cutting surface with no blade marks can be obtained. Therefore, it is possible to perform post-coating without any trouble as it is. In particular, it is desirable that the torsion angle of each cutting blade in two or more rotary cutting tools arranged in multiple stages is gradually increased from that on the cutting upstream side to that on the cutting downstream side. The most upstream side of the cutting is a state in which the two plate pieces are still joined with the adhesive, and the irregular protrusions due to the protrusion of the adhesive or the deviation of the plate pieces are present on the ridge line portion of the apex corner portion. There are many. First, by using a rotary cutting tool having a cutting blade with a small helix angle, such irregular protrusions (adhesive protruding from the apex and part of the plate at the apex) are removed from the apex. Shave off following the irregularities on the ridgeline. Next, the rotary cutting tool having a cutting blade with a larger helix angle is cut again while tracing the previous cutting surface. Since this is the second cutting and the cutting is performed with a cutting blade having a large helix angle, the variation in cutting load is small and a smooth cutting surface can be obtained. When it is necessary to obtain a smoother cutting surface, the number of steps of the rotary cutting tool is further increased.

  In the above case, as the rotary cutting tool, a conventionally known grinder bit including a carbide blade bit or a high speed bit is suitable, and a spiral bit or a cross bit may be used on the condition that the cutting blade also has a twist angle. . Examples of the material of the cutting blade include hard steel, titanium alloy, chromium alloy, stainless alloy, and other alloy steels. If necessary, the blade portion is subjected to hardening treatment. The twist angle of the cutting blade is preferably 45 ° or less, and it is desirable to select the twist angle in the range of 10 ° to 30 ° in consideration of the hardness of the ceramic building board which is the material of the protruding corner column. If the twist angle is less than 10 °, fine irregularities (blades) are likely to appear on the cutting surface due to fluctuations in the cutting force, and if it exceeds 45 °, an effective cutting force cannot be obtained. The number of blades is preferably 7 to 20 blades in relation to strength. In addition, the rotating direction of the rotary cutting tool has the same downcut as the direction of the apex of the corner and the upcut of the reverse rotation. Cut is desirable.

  When cutting using a rotary cutting tool provided with a cutting blade having a twist angle as in the present invention, due to the vibration of the rotary cutting tool, the protruding adhesive root portion and the plate piece surface that the cutting blade does not directly contact Fine cracks are generated in the coating film portion. Therefore, the remaining adhesive can be easily removed by vibration generated by the subsequent rotary cutting tool or by sanding manually by hand.

  As another aspect of two or more rotary cutting tools arranged in multiple stages, a rotary cutting tool having abrasive grains on the surface on the upstream side of the cutting and a rotary cutting tool having a cutting blade running in the axial direction on the surface on the downstream side of the cutting. An embodiment using tools is also a preferred embodiment. In this case, the chamfering is performed as a primary chamfering by cutting with a rotary cutting tool having abrasive grains on the surface. The rotary cutting tool with abrasive grains on the surface is sufficiently durable compared to a rotary cutting tool with a cutting blade that runs in the axial direction, and the adhesive and apex part protruding from the apex part. It is possible to smoothly cut a part of the plate piece. However, since it is cutting with abrasive grains, streaky irregularities are formed on the cutting surface. Since the streak-like irregularities are an obstacle to post-coating as described above, secondary chamfering is performed using a rotary cutting tool provided with a cutting blade that runs in the axial direction on the surface along the primary processing surface. I do. By this processing, streaky irregularities formed on the cutting surface at the time of the primary chamfering process are scraped off to become a flat surface, and the application of the paint when post-coating, that is, finish coating on the chamfered part is good. In addition, the cutting load is reduced compared to performing all necessary cutting with only a rotary cutting tool with a cutting edge on the surface, enabling stable cutting and improving the durability of the rotary cutting tool. To do.

  Furthermore, due to the primary processing surface of the rotary cutting tool having abrasive grains on the surface, fine cracks will be generated in the protruding adhesive base part and the coating surface part of the plate piece that the rotary cutting tool is not in direct contact with. The remaining adhesive is easily peeled off together with the coating film by the minute vibration generated during the secondary chamfering process by the rotary cutting tool provided with a cutting blade running in the axial direction on the surface. Therefore, also in this aspect, the operation of manually removing the remaining adhesive as before can be omitted almost completely.

  In the above aspect, the “rotary cutting tool having abrasive grains on the surface” means a rotary cutting tool obtained by electrodeposition-plating abrasive grains having an average particle diameter of about 30 to 200 μm on the shaft surface, or an adhesive on the shaft surface. It refers to a rotary cutting tool or the like in which abrasives are dispersed after application and the adhesive is dried. Abrasive grains can include sapphire, ruby, garnet, silicon carbide, boron carbide, natural diamond, synthetic diamond, CBN, and the like. As a particle size, the particle size of the grain soil 230 / 270-30 / 40 prescribed | regulated to JISB4130 is preferable. The “rotary cutting tool provided with a cutting blade that runs in the axial direction on the surface” refers to a rotary cutting tool that has a cutting blade that runs in the axial direction on the surface. It may be a blade bit. Examples of the material include hard steel, titanium alloy, chromium alloy, stainless steel alloy, and other alloy steel. When necessary, the blade portion is hardened. Examples of the shape of the cutting edge portion include a shape by a cut groove such as a piercing cut, a spiral cut, and a slen cut.

  In the present invention, the adhesive for joining the plate pieces is not particularly limited, but an isocyanate-based moisture-curable adhesive is preferably used, and more preferably, water is sprayed on the apex and its vicinity after bonding. To do. As a result, the polymerization and curing of the moisture curable adhesive can be promoted, and as a result of the reaction between the isocyanate and water, a large number of voids are formed in the cured adhesive, resulting in a honeycomb shape. The above-described cracks are more likely to occur by cutting with a rotary cutting tool having a cutting blade or by cutting with a rotary cutting tool having abrasive grains on the surface.

  In addition, as described above, each plate piece constituting the protruding corner column for carrying out the chamfering processing method according to the present invention may have any surface handle portion, and in particular, the joint surface as the surface handle portion. For the corners that are formed by joining the embossed pattern so that the embossed pattern of each plate piece matches at the apex corner using a plate piece that has a pattern part that repeats many embossed patterns running in the direction intersecting The apex chamfering method according to the present invention is preferably applied. The reason for this is that when a plate piece having an embossed pattern as described above is used, the number of irregularities formed at the apex portion increases, and in particular, conventionally, there are many to remove the adhesive that protrudes near the bottom of the recess. However, according to the method of the present invention as described above, the rotary cutting tool can enter the recess, and the adhesive at that portion can be easily removed. In addition, fine vibration generated in the rotary cutting tool also effectively acts on the removal of the adhesive.

  As an apparatus capable of effectively carrying out the above-described chamfering method, the present invention is an output formed by joining at least two plate pieces so that one side thereof has an apex portion. An apparatus for chamfering the apex portion of the corner column, and a protruding corner column supporting means for supporting the protruding corner column in a horizontal posture, and the apex angle portion of the protruding corner column supported by the protruding corner column supporting means A rotary cutting tool that chamfers the apex angle portion in contact with the vertical corner, and supports the rotary cutting tool so as to be movable up and down so as to follow the irregularities formed on the ridge line of the apex angle portion of the protruding corner column. A tool supporting means for applying a constant load to the tool, and a moving means for providing a relative movement between the projecting corner pillar and the rotary cutting tool. A chamfering apparatus is also disclosed.

  The mechanism that supports the rotary cutting tool provided in the tool support means so as to be movable up and down may be an arbitrary mechanism such as a slider mechanism or a slider crank mechanism. Further, in order to give a constant load to the rotary cutting tool, the weight of the rotary cutting tool or the tool support means itself may be used, and an appropriate load may be further added to obtain a constant load.

  The tool support means may further include a load adjusting means for adjusting a load applied to the rotary cutting tool. As described in the description of the method, by providing such a load adjusting means, it is possible to flexibly cope with the wear of the rotary cutting tool, the difference in the hardness of the protruding corner column to be processed, and the like. Become. Further, in order to position the rotary cutting tool at the start of machining, the tool support means may be provided with a position adjusting means for adjusting the position of the lowest point of the rotary cutting tool that moves up and down.

  When chamfering is performed, first, at least two plate pieces are joined so that the longitudinal sides thereof have apex corners, or a joining surface as a protruding corner column or a surface handle A protruding corner column is prepared in the same manner as in the prior art, with at least two plate pieces having an embossed pattern running in a direction intersecting with each other and having apex portions on one side.

  The prepared corner pillar is supported by the corner support means in a posture in which the apex portion is exposed upward, for example. The rotary cutting tool supported by the tool support means is positioned so that its axial direction intersects the ridge line direction of the apex corner of the protruding corner column. A rotation is given to the rotary cutting tool by an appropriate rotation mechanism, and a relative movement is caused between the protruding corner column and the rotary cutting tool. When the position adjusting means is provided, the rotary cutting tool is set to an appropriate lowest point position by the position adjusting means, and is moved relative to the protruding corner column supported by the protruding corner column supporting means. , The rotary cutting tool moves upward along a mechanism that supports the rotary cutting tool so that the rotary cutting tool can move up and down, and the protruding corner column easily enters under the rotary cutting tool.

  Then, in the process in which the protruding corner column moves relative to the rotating cutting tool, the rotating cutting tool moves up and down so as to follow the unevenness formed on the ridgeline of the apex corner of the protruding corner column and performs cutting. . The apex portion is cut once or twice or more, and as described in the description of the method, the apex portion is formed with a chamfered portion having a narrow width along the uneven shape of the ridgeline. . At that time, the protruding adhesive is also removed. In addition, although the mechanism which gives rotation to a rotary cutting tool is preferable by a compressed air, another rotating mechanism like an electric rotating mechanism may be sufficient, for example.

  In the chamfering apparatus according to the present invention, the type and the number of the rotary cutting tools to be arranged are as described in the method invention. In addition, for example, when using a plurality of rotary cutting tools, if the load applied to the rotary cutting tool on the upstream side of the cutting is increased, the cutting depth becomes deeper, and the removal of the protruding adhesive is more reliable. Accordingly, the width of the chamfered portion becomes wider, and the chamfered portion becomes conspicuous. On the other hand, when the load is reduced, the cutting depth becomes shallow and the lateral width of the chamfered portion becomes narrow and the processed portion becomes inconspicuous, but there is a possibility that an adhesive may be left behind. For this purpose, it is preferable to adjust the value of the constant load using the above-described load adjusting means in consideration of the appearance conditions required for the protruding corner pillar after chamfering. Specifically, the optimum load (constant load) is selected experimentally or by calculation according to the hardness, material and shape of the protruding corner column to be processed, and according to the wear state of the rotary cutting tool.

  According to the present invention, a method and apparatus for chamfering a corner of a protruding corner column that can make the chamfered portion of the protruding corner column corner inconspicuous are obtained. The protruding corner column manufactured by the chamfering method and apparatus according to the present invention has a chamfered portion that is narrow and inconspicuous. The adhesive, including the adhesive that protrudes to the side of the groove bottom, will be removed almost completely automatically during chamfering, so the chamfering work can be greatly reduced in labor compared to the conventional method. it can.

  The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a chamfering apparatus capable of suitably carrying out a chamfering method for a corner angle of a projected corner column according to the present invention, and FIG. 2 is a view perpendicular to the feeding direction of the projected corner column. FIG. 3 is a side view mainly showing a part of the tool support means. FIGS. 4 and 5 are diagrams for explaining a state when chamfering is performed on the protruding corner column using the apparatus shown in FIGS. 1 and 2, and FIGS. 6 to 8 are FIGS. 1 and 2. It is a figure for demonstrating the protruding corner pillar which performed the chamfering process using the apparatus shown. FIG. 9 shows some examples of a rotary cutting tool provided with a cutting blade having a twist angle.

  In the illustrated example, the chamfering device supports two rotary cutting tools 10 (10a, 10b), a protruding corner column support means 20 including a feed roller 21, and rotary cutting tools 10a, 10b as rotary cutting tools. Two tool support means 30 (30a, 30b) are provided. In this example, each rotary cutting tool 10 includes a cutting blade 11 having a twist angle α, and may have a spiral bit shape as shown in FIGS. 9a to 9c, or may have a cross bit shape as shown in FIG. 9d. In any case, the twist angle α is set to 45 ° or less, preferably in the range of 10 ° to 30 °. In this example, the rotary cutting tools 10a and 10b are cemented carbide bit bits, the twist angle α of the rotary cutting tool 10a located on the upstream side of cutting is 10 °, and the twist angle α of the rotary cutting tool 10b located on the downstream side of cutting. Is 30 ° and both have 14 teeth.

  The protruding corner column support means 20 has a plurality of feed rollers 21 arranged in the horizontal direction, and a flat belt 22 is wound around the whole to stabilize the feed. As in the conventional method, a protruding corner column A having a substantially L-shaped cross section is placed on the feed roller 21 so that the apex portion 3 is exposed upward. Transported in the direction. In order to stabilize the feeding of the protruding corner post A, a pressing roll 23 is provided. The pressing roll 23 is formed in a predetermined manner so that slippage does not occur between the protruding corner column A and the pressing roll 23 due to the load applied to the protruding corner column A from the rotary cutting tool when the protruding corner column is chamfered. The corners A are pressed with pressure. The feed roller 21 corresponds to “a moving means for relatively moving the protruding corner column and the rotary cutting tool” in the present invention.

  The two tool support means 30a and 30b are disposed close to each other along the direction in which the projected corner column A to be processed is sent, that is, the ridge line direction of the apex corner of the projected corner column A, and the tool support unit 30a. Is located on the upstream side in the direction in which the protruding corner column A is sent, and the tool support means 30b is located on the downstream side. The tool support means 30a and 30b have substantially the same configuration except that the twist angle α of the rotary cutting tool 10 to be attached is different.

  Two support columns 33 standing on a fixed machine frame 32 are provided on the side of the protruding corner column support means 20, and a basic block 34 constituting a part of the tool support means 30 a and 30 b with respect to the support column 33. Is attached to move up and down. The basic block 34 is for applying a constant load to the rotary cutting tool 10, and an appropriate weight is selected according to the actual machine.

  Furthermore, on the upper surface of the basic block 34, a support post 38a having two screws is provided via a locking nut 38b, and an additional block 37 (37a, 37b) is detachably attached to the support post 38a. It has been. These additional blocks 37a and 37b are for additionally adjusting the magnitude of the load applied to the protruding corner post A via the rotary cutting tool 10 when cutting, and are a constant load applied to the rotary cutting tool 10. That is, the rotary cutting tool 10 is for further adjusting a constant load acting on the apex portion of the protruding corner column A, and the wear state of the tool, the chamfering conditions of the protruding corner column A, the An additional block having an appropriate weight is selected according to the processing capability of the rotary cutting tool obtained from the material and shape. Of course, when the required constant load is obtained in the basic block 34, an additional block or the like is unnecessary. Further, the additional block 37 constitutes “load adjusting means” in the present invention.

  The basic block 34 includes a pneumatic rotating device 36 connected to an appropriate pneumatic source, and the rotary cutting tool 10 is attached to the tip of the pneumatic rotating device 36 so that the rotation axis C is in the horizontal direction. is there. As shown in the figure, the direction of the axial center line C of the rotary cutting tool 10 is a direction orthogonal to the feed direction X of the protruding corner column A, and the cutting edge 11 is the apex portion 3 of the protruding corner column A to be fed. It is made to ride in the state orthogonal to the ridgeline direction.

  An adjustment bolt 35a is provided between the fixed machine frame 32 and the block 34 as a position adjusting means for adjusting the position of the lowest point of the rotary cutting tool 10 via a detent nut 35b. It arrange | positions in the state screwed together with the bolt hole 35c. The adjustment bolt 35a has a level L1 on the lowermost surface of the cutting blade 11 that is slightly lower than the level L3 on the bottom surface of the groove 7 in the ridge line of the apex portion 3 of the protruding corner post A (see FIG. 4). (Position of T1). Actually, when chamfering is continuously performed on a large number of protruding corner columns 1, the level L <b> 1 of the apex portion 3 slightly changes in each protruding corner column A. Therefore, the predicted average value is used as the level L1, and the rotating bolt 10 has a smooth upward slope from the concave groove 7 of the protruding corner column A to the ridge 8 by the presence of the adjusting bolt 35a. Can be moved to. This is because the adjustment bolt 35a is prevented from entering deeply into the concave groove 7 of the protruding corner column A during cutting. In this way, since the downward movement range of the rotary cutting tool 10 to be cut is regulated by the adjusting bolt 35a, excessive cutting of the apex corner portion 3 of the protruding corner column A due to the stagnation of the rotary cutting tool is prevented, and further Since the height between the bottom of the groove 7 and the top of the ridge 6 is about 3 to 6 mm, the profile cutting can be made smoother.

  In the chamfering process, compressed air is sent to the pneumatic rotating device 36 to give a required rotation (for example, about 25000 rpm) to the rotary cutting tools 10a and 10b. When the projected corner column A is fed using the projected corner column support means 20, the two rotary cutting tools 10a and 10b easily move upward while taking independent actions, and thereafter the projected corners to be fed are sent. It moves up and down so as to follow the irregularities generated in the ridgeline of the apex portion 3 of the column A. Of course, it may be lifted upward in advance by appropriate means.

  FIG. 5A is a perspective view showing an example of a protruding corner post A before chamfering, which is manufactured as described with reference to FIG. In this example, the plate piece 1a has an embossed pattern made up of a large number of ridges 6 and grooves 7 that run in the direction intersecting the joint surface, and the embossed pattern of each plate piece 1a, 1a at the apex 3. It joins so that the unevenness | corrugation of (the repeating pattern of the protruding item | line 6 and the groove 7) may match. The distance between the tops of adjacent ridges is about 10 mm, and the height between the bottom of the groove 7 and the top of the ridges 6 is about 6 mm on average. The adhesive 50 that has protruded when the plate pieces are joined to each other is cured at the apex portion 3. As shown in an enlarged view of the vicinity of the top in FIG. 5b, the amount of the adhesive 50a protruding in the vicinity of the convex top is usually small and the amount of the adhesive 50b in the bottom of the concave groove 7 is increased.

  As shown in FIG. 1, when the protruding corner column A is fed into the apparatus, the rotary cutting tool 10 a attached to the tool support means 30 a located on the upstream side of the cutting first moves along the apex portion 3. As described above, a constant load is applied to the rotary cutting tools 10a and 10b by the basic block 34, the additional blocks 37a and 37b, and the cutting blade 11 having a small twist angle of the rotary cutting tool 10a is Trace the unevenness (the unevenness formed by the portion where the ridges 6 are joined to each other and the portion where the concave grooves 7 are joined) in the ridgeline of the corner 3 in the vertical direction. Cutting (chamfering) is performed while following the ridge line portion of the apex portion 3 while moving and under a cutting resistance corresponding to the load. As a result, the protruding adhesive 50 is stably scraped off in accordance with the concavo-convex shape generated on the ridge line of the apex corner portion 3, and at the same time, as shown in FIG. As the chamfering process proceeds, a narrow chamfered surface 8 is formed.

  Further, as described above, the adhesive 50a is almost removed by the chamfering process up to the depth P because the protruding amount of the adhesive 50a is small in the vicinity of the joint portion between the ridges 6. However, in the vicinity of the joint portion between the concave grooves 7, a hanging portion 50c of the adhesive 50b is formed particularly near the bottom portion thereof, and a portion that cannot be removed by cutting with the rotary cutting tool 10a remains. However, due to vibration during the cutting of the rotary cutting tool 10a, fine cracks are generated in the protruding portion of the adhesive 50c that is not in direct contact with the coating film portion on the surface of the plate piece 1a.

  In particular, by using an isocyanate-based moisture-curable adhesive as the adhesive 50 and spraying water along the ridgeline of the apex portion 3 after adhesion, the polymerization and curing of the moisture-curable adhesive is promoted, As a result of the reaction between isocyanate and water, a number of voids are formed in the cured adhesive 50 to form a honeycomb. Therefore, the rotary cutting tool 10a is more likely to generate fine cracks due to vibration during cutting.

  Subsequent to the primary chamfering by the tool support means 30a on the upstream side of cutting, secondary chamfering by the tool support means 30b on the downstream side of cutting is performed. The twist angle α of the cutting blade 11 of the rotary cutting tool 10b attached to the tool support means 30b is as large as 30 °, and the cutting blade 11 moves along the primary chamfering surface 8 so that the primary chamfering surface 8 is changed. Further, a flat cutting surface is obtained while cutting. At the same time, vibration due to the rotary cutting tool 10b is transmitted to the protruding adhesive 50c remaining below the cutting surface where fine cracks are generated and the coating film portion on the surface of the plate piece, thereby remaining adhesion. The agent 50c is surely peeled off. The “constant load” applied to the rotary cutting tool 10b attached to the tool support means 30b may be the same as or different from the “constant load” applied to the rotary cutting tool 10a. In a normal case, a good secondary chamfered surface can be obtained even with a smaller load.

  As shown in FIG. 6, in the protruding corner column A that has been chamfered along the ridgeline of the apex portion 3 as described above, the chamfered portion 8 has a reduced width as a whole, and at least the apex portion Since the convex region of the embossed pattern at the corner 3 is a continuous curved surface 8a, as can be seen from a comparison between FIG. 6 and FIG. In addition to being inconspicuous, sunlight portions similar to the sunlight portions S and shading portions D generated on the surface handle portion of the plate piece 1a when exposed to daylight in the daytime also occur on the continuous curved surface 8a of the chamfered processing portion 8 ( 7b), the left and right plate pieces 1a, 1a appear to be continuous with the sunlight part S and the shadow part D. Therefore, the viewer can feel the overall embossed pattern of the left and right plate pieces 1a, 1a as a whole, and the chamfered portion becomes inconspicuous.

  FIG. 8 shows a plan view shape of a portion corresponding to a convex region of an embossed pattern in the chamfered portion 8 at the corner corner A according to the present invention. The shape in plan view refers to a chamfer formed on the apex corner 3 on a line 3L that divides the apex 3 with the apex 3 on the plane, and the apex 3 is on the plane. The shape is visually recognized when looking down at the processed portion. In the example of FIG. 8A, at least adjacent portions, for example, the curved surface 8a1 and the curved surface 8a2 have different shapes in plan view. In the case of a simple repeating pattern, the same shape is naturally repeated. FIG. 8b is another example showing a planar view shape of the continuous curved surface 8a in a portion corresponding to the convex region of the embossed pattern, and is substantially a circle (8a3), a trapezoid (8a4), a triangle (8a5), and a quadrangle. Various shapes such as (8a6) can be used.

  The shape of the above-described various shapes in plan view can be easily obtained by changing the shape of the embossed pattern convex region (ridge 6) in the vicinity of the apex 3. Moreover, a different plan view shape can be obtained also by changing the cutting amount in the chamfering process.

  In the protruding corner column A that has been chamfered along the ridgeline of the apex corner portion 3 as described above, the chamfered portion 8 can be made narrow and the chamfered portion 8 can be made inconspicuous. The surface of the chamfered portion is flat, and post-coating can be performed satisfactorily. Further, the adhesive 50 protruding at the time of joining is almost completely removed, and the post-work by manual work can be omitted. Furthermore, since the cutting is performed in two stages, the load applied to each rotary cutting tool 10a, 10b can be reduced, and the life of each cutting blade 11 can be extended.

  In the above apparatus, by appropriately setting the weight of the additional block 37 according to the hardness of the apex portion 3 of the protruding corner column A to be chamfered, the cutting depth P or the cutting surface is set. The curved surface shape can be adjusted as appropriate. In addition, it is possible to perform stable cutting without being affected by tool wear by selecting the additional block 37 and adjusting the load applied to the apex portion of the projecting column in accordance with the progress of wear of the rotary cutting tool. Can do.

  Furthermore, since the cutting depth and the flatness of the cutting surface also change depending on the feed speed of the protruding corner column A and the rotation speed of the rotary cutting tool 10, depending on the width of the chamfered portion to be obtained and the degree of the unevenness. A block having the optimum weight may be selected experimentally or by calculation. Generally, when the feed rate of the rotary cutting tool 10 is slow, deep cutting is performed, and when the feed rate is fast, shallow cutting is performed.

  In FIG. 4, reference numeral 10c denotes a fixed cutting tool fixed to a machine frame arranged on the upper side in the feed direction of the protruding corner post A with respect to the tool support means 30a on the upstream side of cutting. The fixed cutting tool 10c is set at a position somewhat higher than the level L2 (average level) of the apex corner 3 of the protruding corner column A to be transferred. By arranging such a fixed cutting tool 10c, when a protruding corner column having a ridge line portion protruding beyond a specified value is sent, it is possible to cut that portion in advance. It is possible to avoid the chamfering process from being finished by cutting only the ridge line portion where the rotary cutting tool 10 that moves up and down protrudes.

  Further, in the apparatus shown in FIG. 1, the tool support means 30a and the tool support means 30b are arranged adjacent to each other and facing the same direction, but the tool support means 30a and the tool support means 30b are shown in FIG. As shown in FIG. 11, they may be arranged so as to face each other. Further, only one tool support means 30 may be provided or three or more may be arranged in multiple stages according to the hardness of the protruding corner column to be chamfered and the required finishing degree.

  Further, as the rotary cutting tool of the apparatus shown in FIG. 1, the rotary cutting tool having the torsion angle shown in FIG. 9 was used. However, as shown in FIGS. The rotary cutting tool 12a having the abrasive grains 12d and the rotary cutting tool 12b provided with the cutting blade 12c can be used by being supported by the tool support means 30a and 30b, respectively. In the case of this combination of tools, the rotary cutting tool 12a can play almost the same role as the rotary cutting tool 10a, and the rotary processing tool 12b can play almost the same role as the rotary cutting tool 10b. It is possible to chamfer the apex corner 3 of the protruding corner column.

  Moreover, in said embodiment, with respect to what has the corner | angular part 3 which the magnitude | size of the two board pieces 1a and 1a are the same, and cross | intersects at an angle of 90 degree | times as the protruding corner pillar A Thus, the chamfering process is performed, but this is an example of the protruding corner column A, and the overall shape of the protruding corner column is not limited thereto. Moreover, it manufactured from the board piece (at least 2 board piece which has an embossing pattern which runs in the direction which cross | intersects a joining surface as a surface handle | pattern part) with the surface handle | pattern part which a ridge with a narrow pitch and a ditch | groove repeat as shown in figure. Although the method of the present invention functions particularly effectively in the chamfering of the apex portion with respect to the protruding corner column, the surface pattern of the plate piece may be any, and as a result, the apex portion is formed on the apex portion. The shape of the unevenness is completely arbitrary.

The perspective view which shows an example of the chamfering processing apparatus which can implement suitably the chamfering processing method of the corner angle top part by this invention. The figure which shows the apparatus shown in FIG. 1 seeing from the direction orthogonal to the feeding direction of a protruding corner pillar. The side view which shows the part of the tool support means of the apparatus shown in FIG. The figure for demonstrating the state when performing a chamfering process to a protruding corner pillar using the apparatus shown in FIG. 1, FIG. The figure for demonstrating the state when performing a chamfering process to a protruding corner pillar using the apparatus shown in FIG. 1, FIG. It is the figure which looked at the protruding corner pillar which performed the chamfering process using the apparatus shown in FIG. The figure which shows typically the state of the apex corner | angular part of the protruding corner column shown in FIG. The figure which shows typically the planar view shape in the part mainly corresponding to the convex part area | region of an embossed pattern in the chamfering process part in the protruding corner column shown in FIG. The figure which shows some examples of the rotary cutting blade used by this invention. The perspective view which shows the other example of the chamfering processing apparatus which can implement suitably the chamfering processing method of the corner angle top part by this invention. The perspective view which shows the further another example of the chamfering processing apparatus which can implement suitably the chamfering processing method of the corner angle top part by this invention. The figure which shows another example of the rotary cutting tool used by this invention. The figure which shows the other example of the conventional protruding corner pillar. The figure for demonstrating an example of how to make a corner. The figure which shows the other example of the conventional protruding corner pillar. The figure which shows typically the aspect of the apex corner vicinity in the state before the chamfering process of the protruding corner column shown in FIG.

Explanation of symbols

  A ... protruding column, P ... cutting depth, 1a ... plate piece, 3 ... vertical corner, 6 ... ridge, 7 ... concave groove, 8 ... chamfered part, 10 (10a, 10b) ... rotary cutting tool, DESCRIPTION OF SYMBOLS 11 ... Cutting blade provided with torsion angle, 20 ... Projection corner column support means, 30 (30a, 30b) ... Tool support means, 32 ... Fixing machine frame, 33 ... Strut, 34 ... Basic block, 35a ... Adjustment bolt (position) Adjustment means), 36 ... Pneumatic rotating device, 37 (37a, 37b) ... Additional block (load adjustment means), 50, 50a, 50b, 50c ... Adhesive protruding from the joint

Claims (6)

It is a chamfering method for the apex part in the protruding corner column formed by joining at least two plate pieces so that one side thereof has the apex part,
As a cutting tool, two or more rotary cutting tools that are large enough to be able to enter into the recesses formed in the ridge line at the apex corner of the protruding corner column in multiple steps along the ridge line direction of the apex column of the protruding corner column using arranged, intersecting the axial direction of the rotary cutting tool while applying a constant load, which is adjusted in accordance with the external corner pillar to be processed to the respective cutting tool in the ridge line direction of the apex angle of the external corner posts Chamfering the rotary cutting tool while moving it up and down so as to follow the irregularities formed on the ridgeline of the apex corner of the protruding corner column and making it contact with the apex corner of the protruding corner column as a direction A method for chamfering a top corner portion of a projected corner column, characterized by performing processing. As the two or more rotary cutting tools arranged in multiple stages, a rotary cutting tool having a cutting blade having a twist angle is used, and the twist angle of the cutting blade of each rotary cutting tool is directed from the upstream side to the downstream side of the cutting. 2. The method of chamfering a projected corner column apex portion according to claim 1 , wherein the angle is gradually increased. As two or more rotary cutting tools arranged in multiple stages, a rotary cutting tool having abrasive grains on the surface is used on the upstream side of the cutting, and a rotary cutting tool having a cutting blade that runs in the axial direction on the surface on the downstream side of the cutting. The method for chamfering a protruding corner column corner portion according to claim 1 , wherein the chamfering method is used. An apparatus for chamfering the apex corner portion of the protruding corner column formed by joining at least two plate pieces so that one side thereof has the apex corner portion,
A protruding corner column supporting means for supporting the protruding corner column in a horizontal posture;
A rotary cutting tool that abuts the apex portion of the protruding corner column supported by the protruding corner column support means and chamfers the apex corner portion, and is a recess formed on the ridge line of the apex corner portion of the protruding corner column Two or more rotary cutting tools that are arranged in a multi-stage along the ridgeline direction of the top corner portion of the projected corner column ,
Tool support means for supporting each rotary cutting tool so as to be movable up and down so as to follow the irregularities generated on the ridge line of the apex portion of the protruding corner column;
Load adjusting means provided in the tool support means for giving a constant load adjusted according to the protruding corner column to be machined to the rotating cutting tool, and movement for giving relative movement to the protruding corner column and the rotating cutting tool Means,
A chamfering apparatus for a corner angle of a projected corner column, characterized by comprising at least Two or more rotary cutting tools arranged in multiple stages are rotary cutting tools each provided with a cutting blade having a twist angle, and the twist angle of the cutting blade of each rotary cutting tool is changed from the upstream side of cutting to the downstream side of cutting. 7. The chamfering device for a corner angle of a projected corner column according to claim 6 , wherein the angle is gradually increased toward the corner. In two or more rotary cutting tools arranged in multiple stages, the rotary cutting tool arranged on the upstream side of cutting is a rotary cutting tool having abrasive grains on the surface, and the rotary cutting tool arranged on the downstream side of cutting is on the surface. It is a rotary cutting tool provided with the cutting blade which runs to an axial direction, The chamfering processing apparatus of the corner angle top part of Claim 6 characterized by the above-mentioned.

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