JP5865439B2 - Band saw blade manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a band saw blade, and more specifically, a method for manufacturing a band saw blade in which ridge lines of tooth tips in left and right set teeth are formed in a direction perpendicular to the traveling direction and the cutting direction of the band saw blade . About.

  Conventionally, a band saw machine has been used as an apparatus for cutting a large workpiece made of metal, for example. The band saw blade used in this band saw machine is often a so-called bimetal band saw blade that uses high-speed tool steel or cemented carbide as the cutting edge and tough alloy steel as the body. .

  In the case of a band saw blade using high-speed tool steel for the tooth tip, it is common to perform gear cutting using a bimetallic raw material and then to perform clam swinging.

  In the case of a band saw blade that uses cemented carbide at the tip of the tooth, the carbide tip is repelled by polishing without the clashes being drawn (bending) or by polishing. In some cases, a clearance corresponding to a clam is provided.

  In the type of band saw blade that uses a cemented carbide on the tip of a tooth, the material is called a base metal on which a galette is formed, and then a cemented carbide tip is joined to the tooth tip. In general, the side surface, the flank surface, the squeeze surface, and the like are polished, and then the claws are swung out.

  In addition, there exists patent document 1 as a literature considered to be related to this invention.

JP-A-6-155158

  The band saw blade 1 described in Patent Document 1 has a configuration as shown in FIG. That is, the band saw blade 1 has a configuration in which a straight tooth 5, a right set tooth 7 and a left set tooth 9 in which a set-out process is performed in the right direction are provided on one side of the band-shaped body member 3. Further, cutting tips (tooth tip tips) 11, 13, 15 made of a hard material such as cemented carbide are integrally formed by welding or the like on the tooth tips of the straight tooth 5 and the left and right set teeth 7 and 9, for example. Is provided.

  A tooth tip (cutting tip) 11 provided on the straight tooth 5 is formed as a bevel tooth having inclined surfaces on both the left and right sides. The ridge lines 13A and 15A of the tooth tips 13 and 15 of the left and right set teeth 7 and 9 are inclined by β degrees in the left and right direction, respectively. The tooth tip ridge lines 13A and 15A of the tooth tip chips 13 and 15 are seen from the traveling direction of the band saw blade 1, as shown in FIG. Crossing near the top of The inner corner portions 13B and 15B of the tooth tip chips 13 and 15 are formed smaller than the tooth tip ridge line 11B of the tooth tip tip 11 of the straight tooth 5 by a dimension a. In other words, the tooth height dimension (height dimension from the reference position to the tooth tip) of the left and right set teeth 7 and 9 is smaller than the tooth height dimension of the straight tooth 5.

  By the way, when the left and right set teeth 7 and 9 are set out, the corner portions 13B and 15B of the left and right set teeth 7 and 9 approach the addendum ridge line 11B of the addendum tip 11 due to the inclination β. The inner corner portions 13B and 15B of the tooth tip 13 and 15 may protrude from the tooth tip ridge line 11B of the tooth tip 11. Therefore, before the left and right set teeth 7 and 9 are set out, the left and right set teeth 7 and 9 need to be processed in advance so that the tooth height dimension is smaller than the straight teeth 5 by the dimension c. .

  When the straight tooth 5 is a bevel tooth as in the above configuration, the inner corner portions 13B and 15B of the left and right set teeth 7 and 9 have the teeth of the straight tooth 5 when viewed from the traveling direction of the band saw blade 1. It is important not to protrude from the leading edge line 11B. In the configuration in which the inner corner portions 13B and 15B of the left and right set teeth 7 and 9 protrude from the tooth tip ridge line 11B of the straight tooth 5, the inner corner portions 13B of the left and right set teeth 7 and 9 compared to the straight tooth 5, 15B precedes and cuts into the workpiece, and the bending easily occurs due to the lateral force acting on the inner corner portions 13B and 15B.

  In the band saw blade 1 having the above-described configuration, it is important that the left and right bevel portion ridge lines 11A of the straight teeth 5 that are bevel teeth cross the tooth tip ridge lines 13A and 15A of the left and right set teeth 7 and 9. is there. That is, in the case of the configuration in which the tooth tip ridge lines 13A and 15A of the left and right set teeth 7 and 9 cross the upper end 11C of the left and right bevel portion ridge lines 11A, compared to the left and right set teeth 7 and 9, respectively. The function of the bevel tooth which is the straight tooth 5 is increased, the division of the cutting groove cut by the band saw blade 1 in the width direction becomes unbalanced, and the bending is likely to occur.

  By the way, when the band saw blade 1 is represented by a side view seen from the left-right direction and a bottom view seen from the tooth tip side, it can be represented as shown in FIGS. That is, the left and right set teeth 7 and 9 are formed to be smaller than the straight tooth 5 in advance by the dimension c, and the height difference a is obtained by the left and right set out operations. The ridgelines 13A and 15A are naturally provided with a side angle α. In other words, the tooth tip ridge lines 13A and 15A are arranged such that the outer corner portions 13C and 15C are located on the rear side (FIG. 2B) with respect to the traveling direction (arrow A direction) of the band saw blade 1 than the inner corner portions 13B and 15B. (Left side) Therefore, the tooth tip ridge lines 13A and 15A in the left and right set teeth 7 and 9 have the inclinations of the side angle α and the tooth line inclination angle β.

  In applying the band saw blade 1 to an actual band saw blade, as shown in FIG. 3, the thickness of the body member 3 is 1.3 mm, and the dimensions of the tip edge line 11B of the bevel tooth which is the straight tooth 5 are set to 0. Assuming that the inclination angle of the 7 mm bevel ridge line 11 </ b> A is 45 ° and the amount of clashes of the left and right set teeth 7, 9 is 0.4 mm, for example, the inner corner 13 </ b> B of the right set teeth 7 is the tooth tip ridge line 11 </ b> B of the straight tooth 5. In order not to protrude from the teeth, it is necessary to make the difference in tooth height dimension between the left and right set teeth 7 and 9 and the straight teeth 5 before the set-out process, that is, the size c 0.06 mm.

  Next, under the same conditions as described above, the tooth tip ridge lines 13A and 15A in the left and right set teeth 7 and 9 are crossed below the upper end 11C of the bevel ridge line 11A in the bevel tooth which is the straight tooth 5. The dimension c needs to be set to 0.23 mm as shown in FIG. In this case, the dimension a described above is 0.17 mm.

  As apparent from the above description, when the band saw blade 1 described in Patent Document 1 is applied to an actual band saw blade, the above-described dimension c needs to be set in a range of 0.06 mm to 0.23 mm. It should be noted that the positions where the tooth tip ridge lines 13A and 15A of the left and right set teeth 7 and 9 cross the bevel ridge line 11A of the straight tooth 5 preferably cross the vicinity of the center of the bevel ridge line 11A.

  Therefore, under the same conditions as described above, when the tooth tip ridge lines 13A and 15A in the left and right set teeth 7 and 9 cross the vicinity of the center of the bevel ridge line 11A of the bevel tooth (straight tooth) 5, FIG. As shown, the dimension c is 0.11 mm and the dimension a is 0.05 mm. Therefore, by using the band saw blade 1, the margin when the straight tooth 5 is worn in the tooth height direction is only 0.05 mm, which is not a desirable dimension in consideration of the life of the band saw blade 1.

  In the band saw blade 1, the chips 17 (see FIG. 6) continuously generated by cutting with the left and right set teeth 7, 9 are generated in the galette 19 on the front side in the running direction of the left and right set teeth 7, 9. Tend to be spirally wound. However, since the tooth tip ridge lines 13A and 15A in the left and right set teeth 7 and 9 are inclined by a horizontal angle α with respect to the traveling direction (arrow A direction) of the band saw blade 1, the chips 17 are As shown in FIG. 6B, the band saw blade 1 tends to protrude in the left-right direction perpendicular to the traveling direction.

  Therefore, the chip 17 rubs the cut surface of the workpiece in the cutting groove cut by the band saw blade 1, and the cutting resistance increases and the cut surface becomes rough.

The present invention has been made in view of the conventional problems as described above, and is a method of manufacturing a band saw blade having a cutting tip made of a hard material at a tooth tip, and performing the swinging out of the claws in the left-right direction. The tooth height dimension of the straight tooth is set larger than the tooth height dimension of the left and right set teeth, and the ridgeline of the tip of the left and right set teeth is cut by the left and right set teeth to continuously generate chips in the left and right direction. In order to suppress the protrusion to the right and left, it is formed perpendicularly to the traveling direction of the band saw blade and the cutting direction of the band saw blade by performing grinding after performing the right and left clashes out processing It is what.

Further, in the method of manufacturing the band saw blade, the straight tooth is a bevel tooth having inclined surfaces on both side surfaces of the cutting tip, and the ridge line of the tooth tip in the left and right set teeth is viewed from the traveling direction of the band saw blade. It traverses the vicinity of the center of an inclined bevel ridge line on both sides of a straight tooth.

In the method of manufacturing the band saw blade , the difference in tooth height between the straight tooth and the left and right set teeth is a difference that allows the straight tooth to be worn in the tooth height direction by 0.1 mm or more by using the band saw blade. It is characterized by being.

  According to the present invention, after the left and right set teeth are squeezed out, the tip tips (cutting tips) provided on the left and right set teeth are ground, and the tip edge ridge is formed by the band saw blade. Since it is machined into a form orthogonal to the traveling direction and the cutting direction, it is easy to form the tooth tip ridge line in the left and right set teeth in the direction orthogonal to the traveling direction of the band saw blade, and the right and left set teeth Adjustment of the tooth height dimension of the teeth can be easily performed.

  And since the tooth tip ridge line in the left and right set teeth is orthogonal to the traveling direction of the band saw blade, the chips do not protrude in the lateral direction, and the conventional problems as described above can be solved. Is.

It is explanatory drawing which shows the structure of the conventional band saw blade. It is explanatory drawing which shows the structure of the conventional band saw blade. It is explanatory drawing which shows the relationship between the straight tooth and the right and left set teeth in the conventional band saw blade. It is explanatory drawing which shows the relationship between the straight tooth and the right and left set teeth in the conventional band saw blade. It is explanatory drawing which shows the relationship between the straight tooth and the right and left set teeth in the conventional band saw blade. It is explanatory drawing of the behavior of the chip cut by the left and right set teeth in the conventional band saw blade. It is explanatory drawing which shows the structure of the band saw blade which concerns on embodiment of this invention. It is explanatory drawing which shows the structure of the band saw blade which concerns on embodiment of this invention.

  Hereinafter, the band saw blade according to the embodiment of the present invention will be described with reference to the drawings. The same reference numerals are given to the constituent elements having the same functions as those of the conventional band saw blade 1 described above, and redundant description will be omitted.

  Referring to FIG. 7, a band saw blade 1 according to an embodiment of the present invention includes a straight tooth 5, a right set tooth 7, and a left set tooth 9 on one side of the body member 3 in the same manner as the conventional band saw blade described above. I have. To the tips of the straight teeth 5 and the left and right set teeth 7 and 9, tooth tip (cutting tips) 11, 13, and 15 made of a hard material such as cemented carbide, for example, are welded in the same manner as a conventional band saw blade. Etc. are integrally provided. The straight tooth 5 is formed into a bevel tooth having a bevel portion ridge line 11 </ b> A by forming inclined surfaces on the left and right sides of the tooth tip 11. In addition, since the structure of the straight tooth (bevel tooth) 5 is the same as the conventional structure mentioned above, the detailed description is abbreviate | omitted as attaching | subjecting the same code | symbol to the component which show | plays the same function.

  As shown in FIG. 8 (B), the tooth tip ridge lines 13A and 15A of the left and right set teeth 7 and 9 are orthogonal to the traveling direction (arrow A direction) of the band saw blade 1 and as shown in FIG. In addition, it is formed in a direction orthogonal to the cutting direction (arrow B direction) of the band saw blade 1 with respect to the workpiece. As shown in FIG. 7, the tooth height dimension of the left and right set teeth 7 and 9 is smaller than the tooth height dimension of the straight tooth 5. As shown in FIG. 7, 15 </ b> A crosses the vicinity of the central portion of the bevel ridge line 11 </ b> A in the straight tooth 5 when viewed from the traveling direction of the band saw blade 1. Therefore, when the work is cut by the band saw blade 1, the cutting resistance of the straight teeth 5 and the left and right set teeth 7 and 9 can be distributed in a balanced manner, and stable cutting can be performed.

  As described above, the tip edge lines 13A and 15A of the left and right set teeth 7 and 9 are formed in a direction orthogonal to the traveling direction (arrow A direction) and the cutting direction (arrow B direction) of the band saw blade 1. As a result, the chips that are continuously generated by being cut by the left and right set teeth 7 and 9 are spirally wound in the galette 19, but the traveling direction of the band saw blade 1 is the same as that of the conventional band saw blade. Projecting in the right and left directions perpendicular to each other can be suppressed, and the conventional problems as described above can be solved.

  By the way, in manufacturing the band saw blade 1 according to the embodiment of the present invention, the tooth height of the straight tooth 5 and the left and right set teeth 7 and 9 may be formed to be the same, and the left and right set teeth. The tooth height dimension of 7 and 9 may be formed smaller than the tooth height dimension of the straight tooth 5 in advance. Then, after performing the straightening process (bending) of the left and right set teeth 7 and 9 with respect to the straight tooth 5, the addendum tip 11 in the straight tooth 5 and the addendum tip 13 in the left and right set teeth 7 and 9, 15 polishing (grinding) processes are performed.

  When the tooth height of the straight tooth 5 and the left and right set teeth 9 and 7 are formed to be the same, first, the saw teeth that become the left and right set teeth are drawn out to the left and right. Next, the flank surfaces of the cutting tips prepared on the tooth tips of the left and right set teeth after grinding of the claws are ground, and the edge lines of the tooth tips on the left and right set teeth after scooping are ground. Processing into a form orthogonal to the cutting direction of the blade. Then, grinding is performed on the scooping surfaces of the cutting tips provided on the tooth tips of the left and right set teeth after the set-up process of the claws, and the ridge lines of the tooth tips on the left and right set teeth determine the running direction and cutting of the band saw blade. Process in a form perpendicular to the direction. In addition, the edge line of the tooth tip in the left and right set teeth is the polishing process of the flank of the cutting tip provided on the left and right set teeth of the set tooth after the swinging process of the set file or the polishing process of the scooping surface When performing the above, the height of the tooth is made smaller than that of the saw tooth that is a straight tooth.

  Alternatively, first, the saw teeth that are the left and right set teeth are slid out to the left and right. Next, grinding is performed on the scooping surfaces of the cutting tips prepared on the tooth tips of the left and right set teeth after the set-up process of the claws, and the ridge lines of the tooth tips on the left and right set teeth after flank polishing are the band saw. Processing into a form orthogonal to the traveling direction of the blade. Then, the flank surfaces of the cutting tips prepared on the tooth tips of the left and right set teeth after grinding the claws are polished, and the ridge lines of the tooth tips on the left and right set teeth are cut in the cutting direction and travel of the band saw blade. Process in a form perpendicular to the direction. In addition, the edge line of the tooth tip in the left and right set teeth is the polishing process of the flank of the cutting tip provided on the left and right set teeth of the set tooth after the swinging process of the set file or the polishing process of the scooping surface When performing the above, the height of the tooth is made smaller than that of the saw tooth that is a straight tooth.

  When the band saw blade is configured as described above, the inclination angle (bevel angle) of the bevel tip edge 11A of the tooth tip 11 with respect to the horizontal in the straight tooth 5 is desirably in the range of 30 ° to 60 °, and the lateral side direction and the incision are formed. Considering the balance of directional force, the bevel angle is preferably 45 °. And the dimension of the tooth tip ridge line 11B in the bevel tooth (straight tooth) 5 is preferably in the range of 40 to 70% of the thickness dimension of the body member 3, and acts on the chipping of the portion of the tooth tip ridge line 11B or the bevel tooth 5. Considering cutting resistance, 55 to 65% of the thickness dimension is more preferable.

  As described above, the tooth tips 13 and 15 provided on the left and right set teeth 7 and 9 are ground after the left and right set teeth 7 and 9 are drawn out (bending). It is easy to form the leading edges 13A and 15A in a form orthogonal to the traveling direction (arrow A direction) and the cutting direction (arrow B direction) of the band saw blade 1. At this time, the scooping surfaces of the tip tips 13 and 15 of the left and right set teeth 7 and 9 are formed in a plane parallel to the left and right direction perpendicular to the traveling direction of the band saw blade 1. Therefore, the chips generated continuously by cutting do not protrude in the left-right direction.

  As already understood, the tip tips 13 and 15 of the left and right set teeth 7 and 9 are ground and then ground, so adjustment of the tooth height dimension of the left and right set teeth 7 and 9 is performed. Therefore, the difference in tooth height between the straight tooth 5 and the left and right set teeth 7 and 9 can be set more accurately. That is, the difference in the tooth height dimension can be set to a desired dimension. In this case, during the life of the band saw blade, the direct tooth 5 is worn by about 0.1 mm, so it is desirable that the difference in tooth height dimension is 0.1 mm or more. In other words, it is desirable that the difference in the tooth height dimension is a difference in a range in which the straight tooth 5 is allowed to wear in the tooth height direction by 0.1 mm or more.

DESCRIPTION OF SYMBOLS 1 Band saw blade 3 Body member 5 Straight tooth 7 Right set teeth 9 Left set teeth 11, 13, 15 Cutting tip (tooth tip)
11A Bevel part ridge line 11B, 13A, 15A Tooth edge ridge line 11C Upper end 13B, 15B Inner corner part 13C, 15C Outer corner part 17 Chip 19 Galette

Claims (3)

A method for manufacturing a band saw blade having a cutting tip made of a hard material at the tooth tip, wherein the tooth height dimension of the straight tooth is larger than the tooth height dimension of the left and right clam teeth that have been subjected to the swinging out of the claws. The ridge line of the tooth tip in the left and right set teeth has been subjected to left and right set-up operations in order to prevent the chips generated by cutting continuously by the left and right set teeth from protruding in the left and right direction. A method for manufacturing a band saw blade , characterized in that the band saw blade is formed at right angles to the traveling direction of the band saw blade and the cutting direction of the band saw blade by performing a grinding process later. In the manufacturing method of the band saw blade according to claim 1, straight teeth are bevel teeth provided with inclined surfaces on both side surfaces of the cutting tip, and a ridge line of a tooth tip in the left and right set teeth is from a traveling direction of the band saw blade. A method for manufacturing a band saw blade , characterized by crossing the vicinity of the center of an inclined bevel ridge line on both sides of the straight tooth as viewed. 3. The method of manufacturing a band saw blade according to claim 1 or 2, wherein the difference in tooth height between the straight tooth and the left and right set teeth is that the direct tooth is worn in the tooth height direction by 0.1 mm or more by using the band saw blade. A method of manufacturing a band saw blade , characterized in that the difference is acceptable.

Images