JP2019018259A - Tooth type roll manufacturing method and steel plate processing method - Google Patents

Abstract

To shorten a time required for manufacture of a tooth type roll while assuring an accuracy of a tooth part.SOLUTION: A tooth type roll manufacturing method comprises a rough processing process, and a finishing process. In the rough processing process, rough processing, which is additional processing with use of spray coating and padding, is performed for a part of a periphery of a columnar base material 50, thereby forming plural rough processed projection parts 54, which are arranged in a circumferential direction of the base material 50, on the periphery of the base material 50. In the finishing process, an end mill 44 having a tapered shape, which is matched with an inclination angle of side faces 32A of plural teeth 32 which are formed from the plural rough processed projection parts 54 and a space between the side faces 32A of adjacent teeth 32 which face each other, is used. Finishing including cut processing for simultaneously cutting opposite side parts 54C of adjacent rough processed parts 54 by this end mill 44 is performed, thereby forming plural teeth 32 from the plural rough processed parts 54.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a method for manufacturing a tooth roll for forming a plurality of grooves on the surface of a steel sheet, and a method for processing a steel sheet using the tooth roll.

  As is well known, steel plates are used for various applications, both large and small, and their processing modes are diverse. As an example of the processing mode, it is possible to form a plurality of grooves on the surface of the steel plate, for example, to use as a primary material of a machine product or to optimize the characteristics of the steel plate itself.

  As a technique for forming a plurality of grooves on the surface of such a steel sheet, there is one using a tooth-type roll having a plurality of tooth portions. In the technique using this tooth type roll, the tooth type roll is pressed against the surface of the steel sheet, and a plurality of grooves are formed on the surface of the steel sheet by a plurality of tooth portions (see, for example, Patent Documents 1 and 2).

  In such a tooth type roll, since the plurality of tooth portions are fine, a high processing technique is required for processing the plurality of tooth portions. Various studies are currently being conducted on the processing of such a plurality of tooth portions. Patent Documents 3 to 5 disclose techniques related to processing of a plurality of tooth portions, although they are not tooth-type rolls. That is, Patent Document 3 discloses a technique using etching, Patent Document 4 discloses a technique using thermal spraying and laser processing, and Patent Document 5 discloses a technique using overlay welding.

JP 2002-294416 A JP-A-62-67114 Japanese Patent Laying-Open No. 2015-124437 JP-A-1-317605 JP 2006-291358 A

  This inventor examined the following two methods about the manufacturing method of the tooth-type roll which has a several tooth part. That is, the first method is to perform roughing by adding material to the outer periphery of a cylindrical base material to form roughened portions of a plurality of protrusions, and then finish the plurality of roughened portions. A plurality of tooth portions. In the second method, a roughing process for removing a part of the outer peripheral part of the cylindrical base material is performed to form a roughing part of a plurality of protrusions, and then a finishing process is performed on the plurality of roughing parts. It is the method of giving and forming a several tooth part. As a result of examining the above two methods, the following knowledge was obtained.

  That is, in the first method, a plurality of tooth portions are formed by the material added to the outer peripheral portion of the base material by additional processing, and thus a tooth-type roll having a larger outer diameter than the base material is obtained. On the other hand, in the second method, since a plurality of tooth portions are formed by removing a part of the outer peripheral portion of the base material by the removal process, a tooth-type roll having an outer diameter smaller than that of the base material is obtained.

  Here, in addition to the case where the tooth-shaped roll is obtained by subjecting the above-described method for manufacturing a tooth-shaped roll to roughing and finishing a new base material, a plurality of tooth portions are used. We wanted to include the case where the tooth roll was regenerated by roughing and finishing the worn tooth roll.

  However, in the second method described above, since the removal process is used as the roughing process, the outer diameter of the tooth mold roll gradually decreases every time the tooth mold roll is regenerated. Here, in order to make the pitch of the plurality of tooth portions unchanged, it is necessary to reduce the number of the plurality of tooth portions. However, if the number of tooth portions is reduced, a desired number of grooves cannot be obtained when the grooves are transferred to the steel sheet. On the other hand, it is conceivable to shorten the pitch while keeping the number of the plurality of tooth portions unchanged. However, if this is done, the original function of the plurality of grooves transferred by the plurality of tooth portions cannot be obtained.

  On the other hand, according to the above-mentioned first method, additional processing is used as roughing, and therefore the reduction of the outer diameter of the tooth roll is suppressed even when the processing for regenerating the tooth roll is repeated. can do. Thereby, the pitch and the number of a plurality of tooth parts can be maintained.

  Therefore, the present inventor first examined additional processing applicable to roughing. Further, as an additional process applicable to the roughing process, the use of a material having good compatibility with the material of the base material enables the roughing part to be firmly formed on the outer peripheral part of the base material, so that the thermal spraying and overlay welding are performed. Decided to use.

  Next, the present inventor examined finishing processing capable of forming a plurality of tooth portions with high accuracy. And as a result of earnestly examining the finishing process, the present inventor considered adopting a cutting process using a rotary tool such as an end mill for processing a plurality of tooth portions. The reason is that the accuracy of the tooth portion can be ensured and the tooth portion having the same shape can be created any number of times by NC control or the like by once establishing the machining process.

  Then, the inventor prepares an end mill having a taper shape that matches the inclination angle of the side surfaces of the plurality of tooth portions as finishing processing including cutting processing, and rotates the end mill to process a workpiece such as a rough machining portion. We studied to form a plurality of teeth by grooving.

  FIG. 13 is a diagram for explaining the examination example. In FIG. 13, for the sake of convenience, the outer peripheral portion of the base material 150 that is the base metal of the tooth roll itself is shown as a straight line instead of a curved line. As shown in FIG. 13, in the present study example, a plurality of protruding roughing portions 154 arranged in the circumferential direction of the base material 150 are formed by roughing, which is additional processing, and then finish processing is performed by cutting.

  In the cutting process of this examination example, an end mill 144 having an outer diameter smaller than the interval between the opposing side surfaces 132A of adjacent tooth portions 132 was used. Then, a plurality of grooving processes were performed between adjacent tooth portions 132, and one side surface 132 </ b> A of each tooth portion 132 was formed one by one by the end mill 144. In the present study example, as an example, an end mill 144 having an outer diameter corresponding to half the distance between the opposing side surfaces 132A of the adjacent tooth portions 132 is used. On the other hand, grooving is performed twice.

  However, as in the present study example, when an end mill 144 having an outer diameter smaller than the interval between the opposing side surfaces 132 </ b> A of adjacent tooth portions 132 is used, a plurality of grooving processes are performed between adjacent tooth portions 132. It is necessary to apply, processing time becomes long. Further, when one end side surface 132A of each tooth portion 132 is formed one by one by the end mill 144, chatter vibration is generated due to the escape of the blade of the end mill 144 (relief in the direction away from the side surface 132A) during processing, and the tooth portion 132 It was found that the accuracy decreased.

  In addition, the inventor considered that if the processing time can be shortened, the manufacturing cost of the tooth-type roll used for processing the steel plate can be reduced, and consequently the processing cost of the steel plate can be reduced.

  Therefore, the first object of the present invention is to shorten the time required for manufacturing the tooth roll while ensuring the accuracy of the tooth part, and the second object is to reduce the processing cost of the steel sheet.

  In order to achieve the first object, the method for manufacturing a tooth roll according to the present invention is an additional process using either thermal spraying or overlay welding on a part of the outer peripheral portion of a cylindrical or columnar base material. A rough machining step of forming a rough machining portion of a plurality of protrusions arranged in a circumferential direction of the base material on the outer peripheral portion of the base material, and a plurality of the plurality of rough machining portions formed Using an end mill having a tapered shape matched to the inclination angle of the side surface of the tooth portion and the interval between the opposing side surfaces of the adjacent tooth portions, the opposite side portions of the adjacent roughing portions are simultaneously cut by the end mill. Finishing processing including cutting processing, forming the plurality of tooth portions from the plurality of rough processing portions, and obtaining a tooth roll having the plurality of tooth portions.

  In order to achieve the second object, the steel sheet processing method of the present invention is a method in which the tooth mold roll manufactured by the method of manufacturing the tooth mold roll of the present invention is pressed against the surface of the steel sheet and the plurality of tooth portions. A groove forming step of forming a plurality of grooves on the surface of the steel sheet.

  According to the method for manufacturing a tooth roll of the present invention, the time required for manufacturing the tooth roll can be shortened while ensuring the accuracy of the tooth portion.

  Moreover, according to the processing method of the steel plate of this invention, the processing cost of a steel plate can be reduced.

It is a perspective view explaining one Embodiment of the processing method of the steel plate of this invention. It is F2-F2 sectional view taken on the line of FIG. FIG. 3 is a view taken along line F3-F3 in FIG. 1. 4A is an enlarged cross-sectional view of a peripheral portion of a tooth portion in the tooth-type roll shown in FIG. 1, FIG. 4A shows a case where the tooth portion has an isosceles trapezoidal shape, and FIG. In this case, a wedge shape is shown. It is a figure explaining the roughing process in 1st embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining the upper part cutting process among the finishing processes in 1st embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining the side part cutting process of the finishing process in the first embodiment of the manufacturing method of the tooth type roll of the present invention. It is a figure explaining the process (rough process and finishing process) in 2nd embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining the shrink fitting process in 2nd embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining 3rd embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining the smoothing process in 4th embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining the deburring process in 5th embodiment of the manufacturing method of the tooth-type roll of this invention. It is a figure explaining the example of examination of finishing processing including cutting. It is a top view which compares an example of the down cut at the time of processing the gear roll of the present invention, and an up cut, Drawing 14 (A) shows a down cut and Drawing 14 (B) shows an up cut. It is sectional drawing which compares an example of the shape of the tooth | gear part at the time of processing the gear roll of this invention by a down cut and an up cut, FIG. 15 (A) is up, FIG. 15 (B) is an up The case of processing by cutting is shown.

  First, an embodiment of the steel sheet processing method of the present invention will be described.

  As shown in FIG. 1, in an embodiment of the steel sheet processing method of the present invention, a steel sheet processing apparatus 10 is used. The steel sheet processing apparatus 10 includes a groove forming apparatus 14 as an example. A steel plate 70 as a processing material is sequentially sent from one end side to the other end side in the length direction from the upper step 12 to the lower step 16 through the groove forming device 14 in the direction of the arrow in FIG.

  In the groove forming apparatus 14, a groove forming process is executed, and in this groove forming process, a plurality of grooves 72 are formed on the surface of the steel plate 70 as described in detail later. In one embodiment of the steel sheet processing method of the present invention, the steel sheet is manufactured as described above.

  As shown in FIGS. 1 and 2, the groove forming device 14 has a tooth roll 30 and a pressing roll 20 more specifically. A plurality of protruding teeth 32 are formed on the outer periphery of the tooth roll 30. The plurality of tooth portions 32 are arranged at an equal pitch in the circumferential direction of the tooth roll 30. As shown in FIGS. 2 and 3, each of the plurality of tooth portions 32 is formed in a straight line and is parallel to the axial direction of the tooth roll 30. However, it may be inclined with respect to the axial direction of the tooth roll 30.

  In FIG. 4A, a peripheral portion of the tooth portion 32 in the tooth type roll 30 is shown in a sectional view. In FIG. 4 (A), the outer peripheral surface 34 of the tooth-type roll 30 is shown not in a curved line but in a straight line for convenience. The tooth tip width W of the tooth part 32 is approximately 10 to 100 μm, the height H of the tooth part 32 is approximately 10 to 5000 μm, and the inclination angle of the side surface 32A of the tooth part 32 with respect to the radial direction of the tooth roll 30. β is approximately 10 to 20 °. Further, the pitch P of the plurality of tooth portions 32 is approximately 2000 to 10,000 μm.

  In addition, the tooth part 32 does not necessarily have a fixed shape in the trunk length direction of the tooth-type roll 30. Therefore, the pitch P does not necessarily have to be constant in the trunk length direction of the tooth-type roll 30, and may be changed, for example, such that the work side is small and the drive side is large. In this case, a plurality of pitches are mixed, and the plurality of pitches are overlapped somewhere in the trunk length direction of the tooth-type roll 30.

  4A illustrates the case where the tooth part 32 has an isosceles trapezoidal shape as a cross-sectional shape of the tooth part 32, the tooth part 32 does not necessarily have an isosceles trapezoidal shape. A biased wedge shape as shown in FIG. In this case, if the side where the inner angle of the bottom side of the tooth part 32 is an obtuse angle is used so as to come into contact with the steel sheet first, the tooth part 32 bites into the steel sheet and is preferable. Further, the hypotenuse of the tooth portion 32 does not need to be planar, and may be a curved surface.

  Although it should be difficult to form a biased wedge shape as shown in FIG. 4B, there are the following facts. That is, the rotation direction of the tool is generally clockwise when the tool is viewed from above. As shown in FIG. 14A, the case where the tool 200 cuts the workpiece 202 with the right hand as it is cut is called down cut. In this case, the repulsive force F1 (tool) between the tool 200 and the workpiece 202 is cut. 200 force). On the other hand, as shown in FIG. 14B, the case where the tool 200 cuts the workpiece 202 with the left hand 202 viewed is called up-cut. In this case, the force F2 attracted between the tool 200 and the workpiece 202 is shown. (Force in the direction of pressing the tool 200) works.

  In this way, the direction of the force is reversed in the down cut and the up cut. Using this phenomenon, as shown in FIG. 15A, if the finishing pass by the first pass and the second pass is downcut, the tooth portion 32 can be bent to the opposite side of the tool (2 passes). The side surface of the tooth portion 32 is pushed by cutting the eye). On the other hand, as shown in FIG. 15B, if the finishing pass by the first pass and the second pass is an upcut, the tooth portion 32 can be bent to the tool side (the tooth portion 32 by the second pass cutting). Of the side). Of course, since the cutting force that becomes the driving force of such force depends on the amount of cutting, if a symmetrical shape as shown in FIG. 4A can be realized by adjusting the feed rate of the tool, etc., FIG. It is also possible to realize a biased wedge shape as shown in FIG.

  As shown in FIGS. 1 and 2, the tooth type roll 30 and the pressing roll 20 are arranged in parallel to each other. The pressing roll 20 is arranged close to the tooth roll 30.

  In the groove forming step, the steel plate 70 passes between the tooth-type roll 30 and the pressing roll 20. At this time, the steel sheet 70 is pressed toward the tooth roll 30 by the pressing roll 20, and the tooth roll 30 is pressed against the surface of the steel sheet 70. The tooth roll 30 and the pressing roll 20 rotate in opposite directions with each other in contact with the steel plate 70. When the tooth type roll 30 is pressed against the surface of the steel plate 70, a plurality of grooves 72 are formed on the surface of the steel plate 70 by the plurality of tooth portions 32 formed on the tooth type roll 30.

[First embodiment]
Next, 1st embodiment of the manufacturing method of the tooth-type roll of this invention is described.

  1st embodiment of the manufacturing method of the tooth-type roll of this invention is equipped with a roughing process and a finishing process. The first embodiment of the method for manufacturing a tooth roll of the present invention is shown in FIGS. In FIG. 5 to FIG. 7, for convenience, the outer peripheral portion of the base material 50 that is the metal of the tooth roll itself is shown as a straight line instead of a curved line.

  As shown in FIG. 5, in the roughing process, roughing is performed on a part of the outer peripheral portion of the columnar base material 50. This roughing process is an additional process using either thermal spraying or overlay welding. By this rough machining, an additional portion 52 indicated by an imaginary line (two-dot chain line) is added to the outer peripheral portion of the base material 50, and the rough processing portions 54 of a plurality of protrusions arranged in the circumferential direction of the base material 50 are added. Is formed. The roughened portion 54 is formed higher than a tooth portion 32 (see FIG. 7) described later. It should be noted that the material of the additional portion 52 by overlaying is not necessarily the same as the material of the base material 50 and can be a different material.

  Further, FIG. 5 shows the case where the additional portions 52 are discretely added in the rough machining, but they may be made continuous. Further, the additional portion 52 may be formed in multiple layers. For example, the first layer formed on the base material 50 is entirely added with the A material, and the second layer formed on the first layer is added discretely with the B material. May be used. By doing so, the affinity for the base material 50 is not good, but the B material having excellent wear resistance can be used via the A material having a good affinity for the base material 50. As the A material, a material that requires preheating of the base material 50 when spraying or overlaying can be used. Further, when the first layer is formed on the entire surface, it may be formed by plating.

  Subsequently, in the finishing process, the upper cutting process shown in FIG. 6 and the side cutting process shown in FIG. 7 are sequentially performed. In the first upper cutting process, cutting using a cutting tool 42 is performed as shown in FIG. That is, the disc-shaped cutting tool 42 rotates with the tangential direction of the outer peripheral portion of the base material 50 as the axial direction, and the top 54A of each of the plurality of roughing portions 54 is cut by the cutting tool 42. A flat surface 54B is formed in the cut portion. At this time, each of the plurality of roughened portions 54 is cut by the cutting tool 42 to the same height as a tooth portion 32 (see FIG. 7) described later, and the flat surface 54B is formed with a tooth tip surface of the tooth portion 32 described later. Is done.

  Although FIG. 6 shows a case where the upper portion of the rough processed portion 54 is cut first and the side portion is cut later, the order of cutting may be reversed. FIG. 6 shows the case where the cutting tool 42 rotates to cut the tooth tip surface. However, the coarsely processed roll is fixed to a lathe machine and rotated, and the non-rotated tool is rotated to the roll axis. It may be made to cut top part 54A used as a tooth tip surface by making it move in parallel with.

  In the subsequent side cutting process, cutting using the end mill 44 is performed as shown in FIG. The end mill 44 has a tapered shape in accordance with an inclination angle of side surfaces 32A of a plurality of tooth portions 32 to be described later formed from a plurality of roughened portions 54 and an interval between opposing side surfaces 32A of adjacent tooth portions 32. In addition, the shape and dimensions are set in advance.

  Specifically, a tapered portion 46 is formed on the tip end side of the end mill 44, and the inclination angle of the outer peripheral surface 46A of this tapered portion 46 (inclination angle with respect to the axial direction of the end mill 44 in a side view of the end mill 44) is set. The inclination angle β (see also FIG. 4) of the side surface 32A of the tooth portion 32 is set. The outer diameter of the tip 46B of the tapered portion 46 is set to a dimension corresponding to the interval S on the root circle of the adjacent tooth portion 32.

  Then, in the side cutting process, the end mill 44 rotates along the radial direction of the base material 50 as the axial direction, along the center line between the adjacent rough processing parts 54 (center line extending in the axial direction of the base material 50). Move. Thereby, as shown by an imaginary line (two-dot chain line), opposing side portions 54 </ b> C of adjacent roughing portions 54 are simultaneously cut by the end mill 44.

  Further, the side surfaces 54 </ b> C of the adjacent roughing portions 54 that are adjacent to each other are cut as described above, whereby the side surfaces 32 </ b> A of the tooth portions 32 are formed in the roughing portion 54. Then, the end mill 44 is moved in order along the center line between the adjacent roughing portions 54, and the side portions 54 </ b> C of the adjacent roughing portions 54 are sequentially cut by the end mill 44, whereby a plurality of roughing operations are performed. A plurality of protruding tooth portions 32 are formed from the portion 54.

  In 1st embodiment of the manufacturing method of the tooth-type roll of this invention, the above-mentioned tooth-type roll 30 which has the several tooth part 32 is obtained by the above procedure.

  In the first embodiment, in addition to manufacturing a new tooth-type roll 30, a roughing process and a finishing process are performed on the tooth-type roll 30 in which the plurality of tooth portions 32 are worn due to use. The tooth type roll 30 may be regenerated, and the same tooth type roll 30 as a new article may be manufactured. In this case, in order to remove the fatigue layer, the surface layer of the tooth-type roll 30 is temporarily ground to a predetermined depth by a roll grinder to obtain a smooth cylindrical surface, and then the tooth-type roll 30 is regenerated. May be. At that time, the roll diameter can be recovered by continuously performing the additional processing shown in FIG.

  Next, the operation and effect of the first embodiment of the present invention will be described.

  As described above in detail, according to the first embodiment of the manufacturing method of the tooth type roll of the present invention, it is an additional process using either thermal spraying or overlay welding on a part of the outer peripheral portion of the base material 50. Rough processing is performed to form rough processing portions 54 of a plurality of protrusions arranged in the circumferential direction of the base material 50 on the outer periphery of the base material 50. Next, an upper cutting process is performed as appropriate, and a finishing process including a side cutting process by the end mill 44 is performed to form a plurality of tooth parts 32 from the plurality of roughing parts 54.

  Here, in the above-described side cutting, the inclination angle of the side surfaces 32A of the plurality of tooth portions 32 formed from the plurality of rough processing portions 54 and the interval between the side surfaces 32A facing each other of the adjacent tooth portions 32 are matched. An end mill 44 having a tapered shape is used. Then, the end mill 44 simultaneously cuts opposing side portions 54 </ b> C of adjacent roughened portions 54. Therefore, for example, as compared with the case where one side surface 32A on each side of each tooth portion 32 is formed one by one with the end mill 44 having an outer diameter smaller than the interval between the opposing side surfaces 32A of the adjacent tooth portions 32, the cutting of the end mill 44 is performed. Since the distance is shortened, the machining time can be shortened.

  In addition, the end mill 44 is constrained from both sides in the radial direction by the adjacent roughing portions 54 by simultaneously cutting the opposing side portions 54C of the roughing portions 54 adjacent to each other. Accordingly, since the escape of the blade of the end mill 44 (relief in the direction away from the side surface 32A) can be suppressed during processing, the occurrence of chatter vibration can be suppressed. Thereby, the precision of the tooth part 32 is securable.

  Further, as described above, additional processing using either thermal spraying or overlay welding is performed on a part of the outer peripheral portion of the base material 50 as rough processing, and thus processing for regeneration of the tooth roll 30 is repeated. Even if it goes, it can suppress that the outer diameter of the tooth-type roll 30 reduces. Thereby, the pitch and the number of the plurality of tooth portions 32 can be maintained.

  Furthermore, when the tooth-type roll 30 manufactured according to the first embodiment of the method for manufacturing the tooth-type roll of the present invention is used in the groove forming step of the steel sheet processing method, the manufacturing cost of the tooth-type roll 30 is reduced. Therefore, the processing cost of the steel sheet can be reduced.

[Second Embodiment]
Next, 2nd embodiment of the manufacturing method of the tooth-type roll of this invention is described.

  8 and 9 show a second embodiment of the method for producing a tooth roll of the present invention. In 2nd embodiment, the tooth-type roll 80 (refer FIG. 9) applicable to the tooth-type roll 30 shown by FIG. 1 is manufactured. In order to manufacture this tooth type roll 80, in the second embodiment, the processing steps (roughing step and finishing step) shown in FIG. 8 are executed, and then the shrink fitting step shown in FIG. 9 is executed. Is done.

  In the second embodiment, a cylindrical sleeve 82 made of wear-resistant steel is used as a base material. The wear-resistant steel in this case is a steel material that is resistant to wear, cracking, and dents due to friction and impact. Such wear-resistant steel includes, for example, high carbon chromium bearing steel (SUJ). Hereinafter, the processing step and the shrink fitting step will be described in order.

  First, as shown in FIG. 8, a core material 84 is used in the processing step. The core member 84 is made of, for example, carbon steel for machine structure (S45C). The core member 84 includes a cylindrical main body portion 86 and a pair of shaft portions 88 that protrude from the main body portion 86 on both sides in the axial direction. The main body portion 86 of the core member 84 is fitted inside the sleeve 82. In the processing step, the outer peripheral portion of the sleeve 82 is peeled off with the main body portion 86 of the core member 84 fitted inside the sleeve 82, and then the sleeve 82 is subjected to rough processing and Finishing is applied.

  For this roughing and finishing, for example, roughing in the first embodiment described above (see FIG. 6), that is, additional processing using either thermal spraying or overlay welding, and subsequent upper cutting or side portions Finishing including cutting is applied. For example, the same high carbon chrome bearing steel (SUJ) as the material of the sleeve 82 is used as the material that is built up on the outer peripheral portion of the sleeve 82 by the roughing that is the additional processing.

  Then, by performing roughing and finishing on the sleeve 82 in this way, a plurality of tooth portions 32 are formed on the outer peripheral portion of the sleeve 82. The core material 84 is removed from the sleeve 82 after the sleeve 82 is subjected to roughing and finishing.

  By the way, in the above-mentioned processing step, a core material 84 having an axial length L shorter than the roll core 90 is used instead of a roll core 90 (see FIG. 10) described later. This is because a roll core 90 having a long axial length L is generally used for the roll core 90 described later, and therefore the roll core 90 may not be set on a small general-purpose processing machine. By using the core member 84 having an axial length L shorter than that of the roll core 90, processing with a small general-purpose processing machine becomes possible.

  Note that the above-described peeling processing, roughing processing, and finishing processing are performed by holding the sleeve 82 in a lathe-type rotating device. As a holding means, the core member 84 can be used, and the sleeve 82 itself can also be held by a chuck claw. In that case, the core member 84 can be omitted.

  Subsequently, as shown in FIG. 9, a roll core 90 is used in the shrink fitting process. The roll core 90 also has a cylindrical main body portion 92 and a pair of shaft portions 94 that protrude from the main body portion 92 on both sides in the axial direction, similarly to the core member 84 described above. The roll core 90 is made of, for example, tool steel, and is generally less expensive than wear-resistant steel. The roll core 90 is made of, for example, carbon steel for machine structure (S45C).

  In the shrink fitting process, the main body 92 of the roll core 90 is fitted inside the sleeve 82 by shrink fitting. That is, the sleeve 82 is heated and thermally expanded, and in this state, the main body 92 of the roll core 90 is inserted inside the sleeve 82, the sleeve 82 is cooled and thermally contracted, and the roll core is placed inside the sleeve 82. 90 body parts 92 are fitted. In this way, the main body 92 of the roll core 90 is fitted inside the sleeve 82 by shrink fitting, whereby the tooth roll 80 having the sleeve 82 and the roll core 90 is obtained.

  Note that the surface of the sleeve 82 may be polished for centering the tooth roll 80 after shrink fitting. The core runout of the tooth-type roll 80 may reach, for example, about several hundred μm, and it is preferable that the polishing amount is more than that.

  In addition, the above manufacturing method is an explanation of the case where a new tooth type roll 80 is manufactured. However, when the plurality of tooth portions 32 are worn with use, or the shape of the tooth portions 32 is not good due to runout or the like. When uniformity occurs, the sleeve 82 is removed from the roll core 90 by tempering, and the above-described processing steps and shrink-fitting steps are performed again to regenerate the tooth shape roll 80. You may get.

  Further, in the case of the second and subsequent regeneration processing, the necessary number of times of overlaying may be reduced by grinding the surface of the tooth type roll 80 while leaving a part of the overlaying part.

  Next, the operation and effect of the second embodiment of the present invention will be described.

  As described above in detail, according to the second embodiment of the manufacturing method of the tooth-type roll of the present invention, with the body portion 86 of the core member 84 fitted inside the sleeve 82 formed of wear-resistant steel, The sleeve 82 is subjected to a roughing process, which is an additional process using either thermal spraying or overlay welding, and then a finishing process including an upper cutting process or a side cutting process, and a plurality of outer peripheral parts of the sleeve 82 are applied to the outer periphery. The tooth part 32 is formed. Then, after the core material 84 is removed from the sleeve 82, the roll core 90 is fitted inside the sleeve 82 by shrink fitting to obtain the tooth roll 80 having the sleeve 82 and the roll core 90.

  Therefore, for example, compared to the case where the cylindrical base material made entirely of wear-resistant steel is subjected to roughing and finishing to obtain the tooth-type roll 80, a part of the tooth-type roll 80 is inexpensive. The production cost of the tooth-type roll 80 can be reduced by the amount of use of the roll core 90 formed of a simple tool steel.

  Further, in the machining process, the core material 84 has an axial length L shorter than that of the roll core 90 and can be set on a small general-purpose processing machine in order to enable processing with a small general-purpose processing machine. used. Thereby, since it is not necessary to use a large-sized and custom-made processing machine that can accommodate the roll core 90, the manufacturing cost of the tooth-type roll 80 can be further reduced by using a small general-purpose processing machine. .

  In the processing step of the second embodiment, the roll core 90 is longer than the roll core 90 because the roll core 90 has a long axial length L and cannot be set in a small general-purpose processing machine. Also, a core member 84 having a short axial length L is used. However, for example, when there is a general-purpose processing machine capable of setting the roll core 90, or when the axial length L of the roll core 90 is a dimension that can be set in the general-purpose processing machine, the roll core 90 is started from the stage of the processing step. May be used.

[Third embodiment]
Next, 3rd embodiment of the manufacturing method of the tooth-type roll of this invention is described.

  FIG. 10 shows a third embodiment of the method for producing a tooth roll of the present invention. In 3rd embodiment, the tooth-type roll 100 applicable to the tooth-type roll 30 shown by FIG. 1 is manufactured. In this third embodiment, a cylindrical roll material 102 made of tool steel is used as a base material. The tool steel in this case is a steel material excellent in strength, impact resistance, and wear resistance. An example of such tool steel is carbon steel for machine structure (S45C). The roll member 102 is formed with a pair of shaft portions 104 that protrude on both sides in the axial direction.

  In the third embodiment, roughing and finishing are performed on the roll material 102. For this roughing and finishing, for example, as in the first embodiment described above, additional processing using either thermal spraying or overlay welding, and subsequent finishing including upper cutting and side cutting. Applies. For example, a cobalt-based bearing steel (Stellite (registered trademark)) or the like is used as a material that is built up on the outer peripheral portion of the roll material 102 by roughing that is additional processing. Thus, by performing roughing and finishing on the roll material 102, the tooth-type roll 100 in which a plurality of tooth portions 32 are formed is obtained.

  Note that the above manufacturing method is a description of the case where a new tooth mold roll 100 is manufactured. However, when the plurality of tooth portions 32 are worn with use, the tooth mold roll 100 is peeled. You may return to the state of the roll material 102, perform the above-mentioned roughing process and finishing process again, and reproduce the tooth type roll 100, and obtain the tooth type roll 100 similar to a new article.

  Next, the operation and effect of the third embodiment of the present invention will be described.

  As described above in detail, according to the third embodiment of the manufacturing method of the tooth-type roll of the present invention, the addition using either thermal spraying or overlay welding to the roll material 102 formed of tool steel. A plurality of tooth portions 32 are formed on the outer peripheral portion of the roll material 102 by performing processing and finishing processing including upper cutting processing and side cutting processing thereafter, and the tooth-type roll 100 is obtained. Therefore, for example, compared with the case where the base roll material 102 is formed of wear-resistant steel, the manufacturing cost of the tooth-type roll 100 is reduced by the amount of the roll material 102 formed of inexpensive tool steel. Can do.

[Fourth embodiment]
Next, 4th embodiment of the manufacturing method of the tooth-type roll of this invention is described.

  For example, when additional processing using laser overlay welding, which is an example of overlay welding, is applied to the rough processing in the second and third embodiments described above, in this additional processing, laser light is applied to the base material. A built-up part is formed by throwing metal powder into the melted part by irradiating and melting the metal powder and solidifying the melted part. In this laser overlay welding, not all of the charged metal powder is melted, but a part is scattered as an undissolved powder in a semi-molten state.

  Such undissolved powder may be fixed to a solidified part formed by solidification of dissolved metal powder. Since the size of the undissolved powder is, for example, less than 100 μm, when the portion where the undissolved powder is fixed (undissolved portion) coincides with the tip portion of the tooth portion 32, the undissolved portion is processed during the processing of the tooth portion 32. May peel off from the tooth portion 32 and cause tooth spillage.

  Therefore, in the fourth embodiment of the manufacturing method of the tooth type roll of the present invention, when additional processing by laser overlay welding is performed as rough processing, after the finishing process including upper cutting and side cutting, A smoothing step (additional processing step) using a laser is performed.

  That is, when the tooth shape is processed by side cutting, the above-mentioned undissolved portion is generated in the tooth portion 32 and there is a risk of tooth spillage. By adding a sufficient amount of heat to dissolve and assimilating with the tooth portion 32 itself, it becomes possible to smoothen and suppress tooth spillage.

  FIG. 11 shows a smoothing step in the fourth embodiment of the method for producing a tooth roll of the present invention. In FIG. 11, as an example, the solidified portion 108 is formed on the tooth mold roll 30 by laser overlay welding, and further, the undissolved portion 110 is formed on the distal end side of the tooth portion 32 formed on the solidified portion 108. . In FIG. 11, for convenience, the outer peripheral surface 34 of the tooth-type roll 30 is shown in a straight line instead of a curved line.

  Then, in the smoothing step in the fourth embodiment, as shown in the upper diagram of FIG. 11, the laser beam 62 is irradiated from the irradiation unit 64 to the undissolved portion 110 of the tooth portion 32. Thereby, as shown in the lower diagram of FIG. 11, the undissolved portion 110 is dissolved, and the surface (inclined surface) of the tooth portion 32 is smoothed.

  Thus, in 4th embodiment, since the undissolved part 110 of the tooth part 32 is melt | dissolved and the surface of the tooth part 32 is smoothed, tooth spilling can be suppressed.

  In the fourth embodiment, the tooth portion 32 may be hardened by irradiating the laser beam 62 with the laser beam 62, and the surface layer portion of the tooth portion 32 may be cured.

[Fifth embodiment]
Next, 5th embodiment of the manufacturing method of the tooth-type roll of this invention is described.

  For example, when the finishing process including the upper cutting process and the side cutting process is performed as in the first embodiment described above, the burr 120 may remain in the final processed part of the side cutting process. Such burrs 120 cannot be easily removed with a brush or the like.

  Therefore, in the fifth embodiment of the method for manufacturing a tooth roll according to the present invention, a deburring step (additional processing step) using a laser is performed after finishing processing including side cutting.

  FIG. 12 shows a deburring process in the fifth embodiment of the method for manufacturing a tooth roll of the present invention. In FIG. 12, as an example, the burr 120 remains on the top side of the side surface 32A of the tooth portion 32. In FIG. 12, for convenience, the outer peripheral surface 34 of the tooth-type roll 30 is shown as a straight line instead of a curved line.

  Then, in the deburring step in the fifth embodiment, as shown in the upper diagram of FIG. As a result, as shown in the lower diagram of FIG. 12, the burr 120 is dissolved and removed.

  As described above, in the fifth embodiment, since the burr 120 is melted and removed by irradiating the burr 120 remaining on the tooth portion 32 with the laser beam 62, the burr 120 is suppressed from being transferred to the steel plate. Can do.

  In the fifth embodiment, along with the removal of the burrs 120, the tooth portions 32 may be hardened by irradiating the laser light 62 to harden the surface layer portions of the tooth portions 32.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 Steel plate processing apparatus 14 Groove forming apparatus 30 Tooth type roll 32 Tooth part 32A Side surface 44 End mill 50 Base material 54 Roughly processed part 70 Steel plate 72 Groove 80 Tooth type roll 82 Sleeve (an example of base material)
84 Core material 90 Roll core 100 Tooth type roll 102 Roll material (an example of base material)
110 Undissolved part 120 Bali

Claims (7)

A part of the outer peripheral part of the cylindrical or columnar base material is subjected to roughing which is an additional process using either thermal spraying or overlay welding, and is arranged in the peripheral direction of the base material on the outer peripheral part of the base material. A roughing step for forming a roughened portion of a plurality of protrusions;
Using an end mill having a tapered shape that matches the inclination angle of the side surfaces of the plurality of tooth portions formed from the plurality of roughened portions and the interval between the side surfaces facing each other of the adjacent tooth portions, the adjacent ones by the end mill Finishing is performed to form a plurality of tooth portions from the plurality of rough processing portions by performing a finishing process including cutting that simultaneously cuts opposite side portions of the rough processing portions, thereby obtaining a tooth roll having the plurality of tooth portions. Processing steps,
A manufacturing method of a tooth type roll provided with. For the tooth-type roll worn by use of the plurality of teeth, the roughing step and the finishing step are performed to regenerate the tooth-type roll.
The manufacturing method of the tooth-type roll of Claim 1. Using a sleeve formed of wear-resistant steel as the cylindrical base material,
With the core material inserted inside the sleeve, the sleeve is subjected to the roughing and finishing, and the plurality of teeth are formed on the outer periphery of the sleeve,
After removing the core material from the sleeve, a roll core is fitted inside the sleeve by shrink fitting to obtain the tooth-type roll having the sleeve and the roll core.
The manufacturing method of the tooth-type roll of Claim 1 or Claim 2. Using a roll material formed of tool steel as the columnar base material,
Applying the roughing and finishing to the roll material, forming the plurality of teeth on the outer periphery of the roll material, to obtain the tooth roll,
The manufacturing method of the tooth-type roll of Claim 1 or Claim 2. After the finishing step, the undissolved portion is melted by irradiating the undissolved portion of the tooth portion with a laser beam to smooth the surface of the tooth portion.
The manufacturing method of the tooth-type roll as described in any one of Claims 1-4. After the finishing process, the burrs remaining on the teeth are irradiated with laser light to dissolve and remove the burrs.
The manufacturing method of the tooth-type roll as described in any one of Claims 1-5. The tooth type roll manufactured by the manufacturing method of the tooth type roll according to any one of claims 1 to 6 is pressed against the surface of the steel sheet, and a plurality of grooves are formed on the surface of the steel sheet by the plurality of tooth portions. Including a groove forming step to form,
Steel plate processing method.