JP3782089B2 - 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.

  In general, an exterior corner pillar A as shown in FIG. 7 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. 8a, a ceramic building board 1 having a surface handle portion 5 (FIG. 7) is usually used for manufacturing the protruding corner pillar A, and the board pieces 1a and 1a are cut into appropriate widths. And cut one side of each plate piece diagonally (often at an angle of 45 degrees, but not limited to this) (FIG. 8b), and the cut surfaces 2 and 2 are joined 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. 8c).

  At that time, the apex portion 3 may be displaced or the adhesive may protrude from the apex portion. For the purpose of removing the apex portion 3, the apex portion 3 may be removed by mechanical means such as a tenoner cutting machine. Is chamfered 4 by cutting (FIG. 8d). The chamfer width is generally wide (about 10 mm to 20 mm) for safety.

  If 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 any case, in the conventional chamfering process, the chamfered portion (cutting surface 4) 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.

Instead of the tenoner cutting machine, a cutting machine (not shown) in which a grinder bit 31b having a cutting edge 31c running in the axial direction on the surface as illustrated in FIG. Attempts have also been made to move and perform the required chamfering. If this method is adopted, the chamfered portion 4 can be shaped along the unevenness of the apex portion 3, and a flat surface having a wide width is formed in the chamfered portion as in a tenoner cutting machine. Since it is not formed, the chamfered portion can be made inconspicuous, and a high quality protruding corner column can be obtained. As shown in FIG. 9b, as another form of grindbit 31a, abrasive grains 31d such as diamond powder are temporarily fixed to the surface of the shaft 31h with an adhesive, and then the temporarily fixed abrasive grains are fixed by plating. What was made (electrodeposition tool) is also known (patent document 2).
JP-A-11-188294 JP 2000-153463 A

  Currently, the grindab 31b having a cutting blade 31c that runs in the axial direction as shown in FIG. 9a is made of a material such as hard steel, titanium alloy, and stainless steel, and a required hardening process is applied to the cutting blade portion. It has been subjected. The diameter is usually about 3 to 6 mm. The inventors of the present invention tried to chamfer the above-described corner of the projected corner column using such a grindabite for a product on the market. The ceramic building board which is a piece) has a hardness of 60 to 80 (JISK6253) as measured by a hardness meter (JISK6253), so the wear of the cutting edge during cutting (chamfering) is severe and the durability is insufficient. If the chamfering process is continuously performed on the protruding corner column of the sheet, it is necessary to frequently replace the grinder bit.

  Further, as shown in FIG. 4a, the protruding corner column A is formed by using the plate materials 1a and 1a having fine embossed patterns (repeated patterns of the ridges 6 and the grooves 7) that run in the direction intersecting the joining surface as the surface patterns. It was also attempted to chamfer using the grinder bit 31b described above along the unevenness of the apex portion 3, but the grinder bit was cut up to the portion 50c depending on the protruding adhesive 5 from side to side. Since it does not reach, the remaining part of the adhesive 50 (50c) inevitably remains, and it requires a manual removal operation using a stick file or the like to remove it, which takes a lot of labor and time.

  Therefore, the required chamfering process is performed by moving the cutting machine in which the grinder bit 31b having the cutting blade 31c running in the axial direction is rotated at a high speed along the apex portion 3 of the protruding corner column A. Incorporating this into the actual manufacturing process of the corners is not yet in practical use.

  The present invention has been made in view of the above circumstances, and can be applied to actual product manufacturing without any hindrance, and the apex angle of a protruding corner column using a cutting machine that rotates a grinder davit at high speed. It is an object to provide a method for chamfering a part and an apparatus therefor.

  In order to solve the above-mentioned problems, the present inventors do not use a grindab with a cutting edge (for example, a cemented carbide blade running in the axial direction) on the surface, but an abrasive grain 31d such as a diamond abrasive grain shown in FIG. 9b. A chamfering process was performed on the apex portion of the protruding corner column using a grind davit 31a having a surface of. The grinder bit 31a having the diamond abrasive grains 31d on the surface had durability about five times that of the grinder bit 31b having the cutting edge 31c on the surface, and there was no problem in terms of grinding performance and durability.

  However, diamond abrasive grains are irregular polygons with a particle size of about 100 to 300 μm, streaks are generated on the chamfered ground surface, and the coating is sufficiently applied when finishing coating. Don't be. Therefore, after grinding with a grinder with diamond abrasive grains on the surface, grinding with a grinder with a conventional carbide blade on the surface was performed again, and the streaky lines formed on the ground surface disappeared. It became a flat surface and the post-painting could be done cleanly. Moreover, since it is secondary processing, the load applied to the grinder bit is small, and the durability of the grinder bit is improved.

  The method of chamfering a corner of a projected corner column according to the present invention is based on the above knowledge obtained by the present inventors so that at least two plate pieces have apex portions on one side. A method of chamfering the apex corner portion of a protruding corner column formed by bonding with an adhesive, wherein primary chamfering is performed by cutting with a grinder bit having abrasive grains on the surface, and then a shaft is formed on the surface. A secondary chamfering process is performed by a grinder with a cutting blade that runs in a direction.

  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. In addition, the present invention is basically a method for performing a required chamfering process by moving a cutting machine in which each grinder bit is rotated at a high speed along the apex portion, compared with the case of using a tenoner cutting machine. Thus, the chamfered portion can be made to have a narrow lateral width along the unevenness of the apex portion. As a result, the chamfered portion becomes inconspicuous, and a high quality protruding corner column is obtained.

  In the chamfering process, cutting with a grinder bit having abrasive grains on a surface with sufficient durability is performed as a primary chamfering process. Thereby, the adhesive protruding from the apex portion and a part of the plate piece at the apex portion are cut along the unevenness formed on the apex portion. Since the cutting is performed by abrasive grains, as described above, streaky irregularities are formed on the cutting surface, and the protruding adhesive base part and the coating film part on the surface of the plate piece that the grinder dab does not directly contact are formed. Fine cracks occur (this is also a new finding obtained by the inventors through experiments).

  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. More preferably, after bonding, water is added to the apex and the vicinity thereof. Spray. 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.

  Thereafter, secondary chamfering is performed along the primary processing surface. The secondary chamfering is a grinding with a grindab with a cutting edge running in the axial direction on the surface, and the stripe-shaped irregularities formed on the cutting surface during the primary chamfering process are scraped to become a flat surface. Therefore, the application of the paint when finish-coating the chamfered portion is good. In addition, the cutting load is reduced compared to performing all necessary cutting with only a grindab having a cutting edge on the surface, enabling stable cutting and improving the durability of the grinderdbit.

  Further, as described above, the protruding adhesive remaining under the cutting surface has fine cracks at the base portion, and the coating film portion on the surface of the plate piece to which the adhesive is adhered In addition, since the fine cracks are also generated, the remaining adhesive is easily peeled off together with the coating film due to the fine vibration generated during the secondary chamfering process (this is also the case that the present inventors conducted experiments. New knowledge obtained through this). Therefore, as in the past, the operation of manually removing the remaining adhesive can be omitted almost completely.

  In addition, 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, but particularly in a direction intersecting the joining surface as the surface handle portion. In accordance with the present invention, a protruding corner column formed by using a plate piece having a pattern portion that repeats a large number of running embossed patterns and joining the unevenness of the embossed pattern of each plate piece at the apex corner portion. The chamfering method for the apex corner 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. This is because the manual removal of the adhesive can be almost completely omitted according to the method of the present invention as described above.

  In the present invention, the “grinder bit having abrasive grains on the surface” means a grinder bit obtained by electrodeposition-plating abrasive grains having an average particle diameter of about 30 to 200 μm on the shaft surface, or an abrasive after applying an adhesive to the shaft surface. The grindabt etc. which sprayed the grain and dried the adhesive agent etc. are mentioned, For example, the grindabbit manufactured by the method as described in patent document 2 can be mentioned. 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.

  In the present invention, the “grind davit having a cutting edge that runs in the axial direction on the surface” refers to a grindab with a cutting edge that runs in the axial direction on the surface, as shown in FIG. It may be a known so-called carbide blade bit. Examples of the material include hard steel, titanium alloy, chromium alloy, stainless steel, and other alloy steels. If 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.

  When chamfering is performed, two types of grinder bits are attached to an appropriate bit rotating device, and are arranged so as to intersect with the ridgeline of the apex corner of the protruding corner column to be processed. Then, the chamfering process by the grinder bit proceeds by moving each grinder bit along the unevenness present in the apex portion while rotating. The above processing may be performed by a device that is held by an operator like a hand grinder. However, manual work is not suitable for uniformly processing a large amount of work, and individual differences among workers are likely to occur.

  In order to solve the problem, the present invention also discloses an apparatus capable of substantially automatically performing the above-described chamfering method of the projected corner column apex portion. That is, an apparatus for chamfering the apex corner portion of an output corner column formed by joining at least two plate pieces with an adhesive such that one side thereof has an apex portion. The apparatus has at least two kinds of grinders positioned so as to intersect the apex part of the projecting column and chamfering means provided with the rotation mechanism, and each grinder bit follows the irregularities of the apex part. However, the preceding first type of grinder bit is a grinder bit having abrasive grains on the surface, and the second type of grinder bit that follows is cut along the axial direction on the surface. It is a grind davit with a blade.

  In a preferred embodiment, the above-mentioned apparatus has a protruding corner column supporting means for supporting the protruding corner column in a horizontal posture with the apex portion exposed, and the grind bit of the first form and the second form of the chamfering processing means. The grind davits are supported to be movable up and down with respect to the fixed machine frame via elastic bodies, and further include moving means for providing relative movement between the protruding corner column supporting means and the chamfering processing means.

  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 set so that the apex portion is exposed upward, for example, and the exit corner column is set so that the grind bit of the chamfering means intersects the apex portion, Give each grindbit a rotation. The rotating mechanism is preferably one that uses compressed air, but may be another rotating mechanism such as an electric rotating mechanism.

  In a state where each grinder bit is rotated, each grinder bit is moved along the irregularities of the apex portion. Each grinder bit may be moved while fixing the protruding corner column, or each protruding corner column may be moved while fixing each grinder bit. Both may move in a state having a relative speed. Such a movement can be stably performed by providing the protruding corner column supporting means that supports the protruding column in a horizontal posture with the apex portion exposed.

  As a result of the movement, the apex portion of the protruding corner column is subjected to primary chamfering along the unevenness of the apex portion by the grindbit of the first form, which is a grindbit having abrasive grains on the surface, A secondary chamfering process is performed by the grinder bit of the second form, which is a grinder bit having a cutting edge along the axial direction. Thereby, as described above, a chamfered portion with a narrow width is formed at the apex corner portion, and a protruding corner column from which the protruding adhesive is removed is manufactured.

  A mechanism that allows each grindbit to move up and down along the irregularities of the apex portion is arbitrary, and there is no particular limitation. Each grinder bit is attached to an appropriate column so that it can slide freely in the vertical direction, and the operator can trace each irregularity formed on the top corner of the protruding corner column to be processed. May be moved up and down. The amount of cutting (cutting depth) of the apex corner varies depending on the load of the worker pressing the grind davit to the apex corner. However, although the degree of freedom of work is large, the uniformity of the chamfering process is lost accordingly.

  The grinder bit of the first form and the grinder bit of the second form in the chamfering means are respectively supported to be movable up and down through an elastic body with respect to the fixed machine frame, and relative to the protruding corner column support means and the chamfering means. It is possible to perform chamfering processing with high uniformity by providing a moving means for giving a smooth movement. In this aspect, each grinder bit is maintained in a floating state with its own weight supported by an elastic body, and each grinder bit is a machine frame depending on the contact state between each grinder bit and the corner angle of the projected corner column. Automatically move up and down. In addition, by appropriately selecting the load applied to the grinder davit, the length of the elastic body and the spring constant, the vertical position of the grinder bit relative to the apex of the projected corner pillar to be machined when in a non-contact state body When the apex portion of the protruding corner column and each grindab are in contact with each other, the load applied to one of the other and the variable amount thereof can be appropriately set.

  By performing the above setting for each grinder bit, an optimum cutting state can be obtained for each grinder bit. When the load applied to the grind davit of the first form is increased, the cutting depth becomes deeper and the removal of the protruding adhesive is further ensured. However, the lateral width of the chamfered portion is widened, and the chamfered portion is conspicuous. It becomes like this. On the other hand, when the load applied to the grind davit of the first form is reduced, the cutting depth becomes shallow and the lateral width of the chamfered portion becomes narrow and the processed portion becomes inconspicuous, but the adhesive may be left behind. An elastic body having an optimal spring constant may be selected experimentally or by calculation in consideration of the appearance conditions required for the protruding corner column after chamfering.

  Normally, the above-described setting for the second form grinder bit allows the second form grinder bit to move along the cutting surface while cutting off the streaky irregularities formed on the cutting surface by the first form grinder bit. It is set as follows.

  Note that the cutting depth and the flatness of the cutting surface vary depending on the relative speed difference between the protruding corner column and the grinder davit and the rotation speed of the grinder davit. It is more recommended to choose a body.

  According to the present invention, a processing method and apparatus using a rotating grinder bit suitable for making a chamfered portion of a protruding corner top corner portion inconspicuous can be made more practical. The protruding corner column manufactured by the chamfering method and apparatus according to the present invention has a chamfered portion that is narrow and conspicuous, and even a protruding corner column having a concavo-convex shape at the apex portion protrudes therefrom. Since the adhesive, including the adhesive that protrudes in the vicinity of the bottom of the groove, is removed almost completely automatically during the chamfering process, the chamfering work can be greatly saved in labor compared to the conventional case.

  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. It is the schematic shown seeing from the direction to do. 3 and 4 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 FIG. 4a is a protruding corner column before chamfering is performed. Shows the state.

  The chamfering processing apparatus includes a protruding corner column supporting means 20 having a feed roller 21 and a chamfering processing means 30 having two kinds of grindabits 31a and 31b. 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 column A, it is desirable to provide the pressing roll 23, but it may be omitted.

  In this example, the chamfering means 30 is composed of two chamfering means 30a and 30b arranged close to each other. The first axial chamfering means 30a is a first chamfering means as shown in FIG. 9b. The grinder bit 31a having the abrasive grains 31d on the surface which is the grind bit of the form, and the second shaft chamfering means 30b is arranged on the surface of the grind bit of the second form as shown in FIG. 9a. A grinder bit 31b having a cutting edge 31c along the direction is provided. The first axial chamfering means 30a is located on the upper side in the direction in which the protruding corner pillar A is sent, and the second axial chamfering means 30b is located on the lower side.

  The first shaft chamfering processing means 30a and the second shaft chamfering processing means 30b have substantially the same configuration except that the shape of the grinder bit to be attached is different. Each of the chamfering processing means 30 a and 30 b has a support column 33 erected on the fixed machine frame 32, and a block 34 is attached to the support column 33 so as to be movable up and down. Between the fixed machine frame 32 and the block 34, a coil spring 35 that is extrapolated to the support 33 is disposed. The block 34 is used to apply a necessary load necessary for cutting to the grinder dabs (31a, 31b), and an appropriate weight is selected according to the actual machine.

  The block 34 is provided with a pneumatic rotating device 36 connected to an appropriate pneumatic source, and a grinder bit (31a, 31b) is attached to the tip of the pneumatic rotating device 36 so that the rotation axis C is in the horizontal direction. It is. As shown in the figure, the direction of the axial center line C of the air grinder 31 is a direction orthogonal to the feeding direction X of the protruding corner column A, and the ridge line direction of the apex portion 3 of the protruding corner column A to which the cutting region is fed It is made to ride in the state orthogonal to.

  The strength (spring constant) of the coil spring 35 disposed between the fixed machine frame 32 and the block 34 is such that the grindbit (31a, 31b) of the coil spring 35 when the block 34 is placed on the coil spring 35 in a free state. As shown in FIG. 3, the level L1 on the lowermost surface is slightly lower than the level L3 on the bottom surface of the concave groove 7 in the apex portion 3 of the outgoing corner post A (position T1 in FIG. 3). Set to be.

  During the chamfering process, the pneumatic rotating device 36 is supplied with compressed air to give the required rotation (for example, about 25000 rpm) to the grinder dabs (31a, 31b). When the projected corner column A is fed using the projected corner column support means 20, each block 34 receives an upward force from the coil spring 35, and the two grindabs (31a, 31b) behave independently of each other. It is possible to automatically ride on the apex corner portion 3 of the protruding corner column A which is easily moved upward and sent.

  FIG. 4A 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 convex shape 6 and the repeating pattern of the ditch | 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. 4b, the amount of adhesive 50a that protrudes near the top of the ridge is usually small, and the amount of adhesive 50b that protrudes at the bottom of the groove 7 increases.

  As shown in FIG. 1, when the protruding corner column A is fed into the apparatus, a grinder bit 31a having abrasive grains (in this example, diamond abrasive grains) on the surface attached to the first axial chamfering means 30a is first apex portion. Move along 3. As described above, due to the presence of the coil spring 35, the load acting on the apex angle portion 3 of the grinder bit 31a is reduced, and the grind bit 31a has unevenness (protrusions at the apex angle portion 3) generated in the apex angle portion 3. The ridge line portion of the apex corner portion 3 is cut (chamfered) while moving up and down in a shape that traces the unevenness formed by the portion where the 6 are joined and the portion where the concave grooves 7 are joined. As a result, the protruding adhesive 50 is scraped off, and at the same time, as shown in FIG. 4b, chamfering at a depth Pa proceeds at the apex portion 3 to form a narrow chamfered surface 4. . However, since cutting is performed with diamond abrasive grains, it is inevitable that streaky irregularities are formed on the processed surface 4.

  Further, as described above, the adhesive 50a is almost removed by the chamfering process up to the depth Pa 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 grinder bit 31a remains. However, the grinder bit 31a causes fine cracks in the protruding portion of the adhesive 50c that is not in direct contact with the coating 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 on the apex portion 3 and its vicinity after adhesion, the polymerization and curing of the moisture-curable adhesive is promoted and the isocyanate is accelerated. As a result of the reaction between water and water, a number of voids are formed in the cured adhesive 50 to form a honeycomb. Therefore, the surface hardness of the adhesive after curing is about 40 with a D-type hardness meter (conforming to JISK6253), but fine cracks are more likely to be generated by the grinder bit 31a provided with diamond abrasive grains.

  Continuously to the primary chamfering by the first axial chamfering means 30a, the processed surface 4 is subjected to secondary chamfering by the second axial chamfering means 30b. The grinder bit 31b attached to the second shaft chamfering means 30b is provided with a cutting edge (carbide blade) 31c (FIG. 9a) that runs in the axial direction on the surface, and the grinder bit 31b extends along the primary chamfering surface 4. By moving, the streak-like irregularities formed there are scraped off to form a flat surface. At the same time, the vibration due to the grinder bit 31b 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 adhesive. 50c peels reliably with the coating film.

  In the protruding corner column A in which the chamfering process is performed on the apex part 3 as described above, the chamfering part 4 can be made narrow, the chamfering part 4 can be made inconspicuous, and the chamfering process can be performed. The surface of the part is flat, and post-coating can be performed satisfactorily. Further, the adhesive a protruding at the time of joining is almost completely removed, and the post-work by manual work can be omitted. Further, in the secondary chamfering process, the load applied to the grinder bit 31b is small, and the life of the grinder bit 31b having the cutting edge 31c on the surface can be extended.

  In the above apparatus, the cutting depth Pa or the shape of the curved surface is appropriately adjusted by appropriately setting the spring constant of the coil spring 35 according to the hardness of the apex portion 3 of the protruding corner column A to be chamfered. it can. Further, 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 rotational speed of the grind davit (particularly the grind davit 31b), the width of the chamfered portion to be obtained and the unevenness are obtained. Depending on the degree, the coil spring 41 having the optimum spring constant may be selected for each of the machining means 30a and 30b experimentally or by calculation.

  In FIG. 3, reference numeral 37 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 first shaft chamfering means 30 a. The fixed cutting tool 37 is set at a position somewhat higher than the level L2 (average level) of the apex corner 3 of the projected corner post A to be transferred. By arranging such a fixed cutting tool 37, it becomes possible to cut that part in advance when a protruding corner column with a ridge line part protruding beyond the specified value has been sent, It is possible to avoid the chamfering process from being finished by cutting only the ridge line portion from which the vertically moving grind davit 31a protrudes.

  Further, in the apparatus shown in FIG. 1, the first axial chamfering means 30a and the second axial chamfering means 30b are arranged adjacent to each other and facing the same direction. The same protruding corner column A can be implemented as long as it can receive both the primary chamfering by the first axial chamfering means 30a and the secondary chamfering by the second axial chamfering means 30b. 2, the two chamfering means 30 a and 30 b may be arranged so as to be largely separated as shown in FIG. 5, or may be arranged so as to face each other as shown in FIG. 6. Is.

  In the above embodiment, as the protruding corner column A, the two plate pieces 1a and 1a have the same size and have apex portions 3 that intersect at an angle of 90 degrees. 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 embossed pattern which runs in the direction which cross | intersects a joining surface as a surface handle | pattern part) with the convex pattern and narrow groove | channel where a narrow pitch repeats 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.

  Further, as the chamfering means 30, a first axial chamfering means 30a having a grinder bit 31a having abrasive grains on the surface and a second axial chamfering means 30b having a grinder bit 31b having a cutting edge on the surface are provided. Although the one provided is illustrated and described, one or more of each may be arranged on the condition that the second shaft chamfering means 30b is located on the lower side in the feed direction of the protruding corner post.

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 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. 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 an example of the conventional protruding corner pillar. The figure for demonstrating an example of how to make a corner. The figure for demonstrating two forms of a grind davit.

Explanation of symbols

  A ... extruded column, Pa ... cutting depth, 1a ... plate piece, 3 ... vertical corner, 4 ... chamfered portion, 6 ... convex strip, 7 ... concave groove, 50, 50a, 50b, 50c ... joint portion Extruded adhesive, 20 ... Projection corner column support means, 30 ... Chamfering processing means, 30a ... First shaft chamfering processing means, 31a ... Grind davit of the first form, 31d ... Abrasive grains, 30b ... Second axis chamfering processing means , 31b ... grind davit of the second form, 31c ... cutting blade along the axial direction, 32 ... fixed machine frame, 33 ... support, 34 ... block, 35 ... coil spring, 36 ... pneumatic rotating device

Claims (3)

A chamfering method for the apex corner portion in the protruding corner column formed by joining at least two plate pieces with an adhesive so that one side thereof has apex corner portions,
The first corner chamfering is performed by cutting with a grindabbit having abrasive grains on the surface, and then the second chamfering is performed with a grinderbit having a cutting blade running in the axial direction on the surface. Chamfering method of the part. An apparatus for performing chamfering of the apex portion in the protruding corner column formed by joining at least two plate pieces with an adhesive so that one side thereof has apex portions,
It has at least two types of grinders positioned so as to intersect the apex part of the protruding corner column and a chamfering means equipped with a rotation mechanism thereof, and each grinder bit can move up and down along the irregularities of the apex part. The preceding first type of grinder bit is a grinder bit having abrasive grains on the surface, and the second type of grinder bit that follows is a grinder having a cutting edge that runs in the axial direction on the surface. A chamfering device for a corner angle of a projected corner column, which is a bit.   It has a protruding corner column supporting means for supporting the protruding corner column in a horizontal posture with the apex corner exposed, and the first type of grinder bit and the second type of grinder bit in the chamfering processing unit are respectively connected to the fixed machine frame. 3. A moving means that is supported so as to be movable up and down via an elastic body, and that provides relative movement between the corner support means and the chamfering means. A chamfering device for the top corner of a protruding corner.

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