JP4143168B2 - Flat cutting cutter block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plane cutting cutter block used for cutting wood and other various materials with a wood processing machine such as a lathe or molder or a similar machine.
[0002]
[Prior art]
Conventionally, as a woodworking board which is an example of this kind of flat-cutting cutter block, as shown in Japanese Patent Laid-Open No. 6-293003, circular saws are stacked and each cutting edge is shifted in the circumferential direction with a minute pitch. A configuration in which the cutting edges are arranged in a spiral is known. Thereby, it is going to reduce the cutting sound of the woodworking board.
[0003]
[Problems to be solved by the invention]
However, since this woodworking lathe has a structure in which the cutting edges are slightly shifted in the circumferential direction, the blade part protruding from the outer periphery partially overlaps, and chips may be clogged in the vicinity of the overlapping part. Is expensive. Due to such clogging of chips, there is a problem that the blade body is distorted and the cutting accuracy of the grid is lowered.
[0004]
In each circular saw unit, a large blade chamber is formed by deeply cutting the outer peripheral surface of the body between the cutting edges in the center direction. Even if the work material is fed, the feeding cannot be regulated, and cutting may be performed in an overloaded state. Cutting in such an overloaded state may lead to kickback (reverse feed) of the work material, damage to the blade tool, or the like. Furthermore, even by adopting the above structure, it has been impossible to reduce cutting noise and idling noise to a satisfactory level.
The present invention is intended to solve the above-described problems, and is a cutter for flat surface cutting that is free from chip clogging, can avoid cutting in an overload state, and has sufficiently reduced cutting noise and idling noise. The purpose is to provide blocks.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the structural feature of the invention according to claim 1 is that the blade bodies are arranged at equal intervals on the outer periphery of a disk-shaped body having a mounting hole into which the rotation shaft is inserted. A flat cutting cutter block in which a plurality of single cutters each having a cutting edge fixed to the blade body are coaxially stacked and integrated, and the unit cutter has a blade in front of the blade body rotation. The body is provided with a blade chamber that is continuously recessed in the radial direction in the body, and the bottom of the body extends in the middle of the outer periphery of the body extending from each blade chamber to the next blade body provided on the front side of the rotation. Provided with at least one recess whose distance from the axis of the body is substantially the same, and configured so that the cutting radius of each cutting blade is 0.5 to 5 mm larger than the radius of the outer periphery of the body, and a plurality of unit cutters, With each cutting blade placed in a position facing the recess of the adjacent unit cutter The layers, in providing the long groove of the plural rows in the outer peripheral surface by continuous and depressions and gullet of a plurality of unit cutters.
[0006]
In invention of Claim 1 comprised as mentioned above, by restrict | limiting the upper limit of the protrusion amount from the outer periphery of a body of a cutting-blade tip, it can restrict | limit excessive feeding of a work material by the outer periphery of a body, It is possible to avoid the risk of kickback and the risk of being greatly involved even if the operator accidentally brings a part of the body such as a hand into contact with the rotating blade tool. Further, by limiting the upper limit of the amount of protrusion from the outer periphery of the body at the tip of the cutting edge, the overall shape of the cutter block can be made close to a cylindrical shape, and wind noise during rotation can be reduced.
[0007]
Furthermore, instead of stacking the cutting blades slightly shifted in the circumferential direction as in the past, the cutting blades of adjacent unit cutters are arranged at intervals of a plurality of cutters in the axial direction. The blade is protruded from the outer peripheral surface by itself, and clogging of cutting waste between the cutting blades can be prevented. Further, by providing a long groove that is continuous between the blade chamber and the recess, it is possible to improve the dischargeability of the cutting waste. Further, since this plane cutting cutter block has a structure in which a plurality of single cutters are laminated, the length in the axial direction can be freely changed according to the application, which is very convenient.
[0008]
Further, the structural feature of the invention according to claim 2 is that, in the plane cutting cutter block according to claim 1, the end of the cutting blade on the body axis side is the axis of the body with respect to the outer periphery of the body. It exists in the center side position.
By configuring the invention of claim 2 as described above, in addition to the effect of the invention of claim 1, the brazing area can be reduced by re-polishing the cutting blade several times from the outer peripheral flank side. Since the end of the cutting edge on the body axis side extends from the outer periphery of the body to the position on the axis side of the body, brazing strength can be secured.
[0009]
Further, the structural feature of the invention according to claim 3 is that, in the plane cutting cutter block according to claim 1 or 2, the bottom portion of the recess adjacent to the cutting edge of each unit cutter or the vicinity thereof. To be placed in.
By configuring the invention of claim 3 as described above, in addition to the effects of the inventions of claims 1 and 2, the entire depression can be effectively used for discharging chips cut by the cutting blade.
[0010]
Further, the structural feature of the invention according to claim 4 is that, in the plane cutting cutter block according to any one of claims 1 to 3, the blade thickness of the cutting blade is the thickness of the body. It ’s bigger.
In the invention of claim 4 configured as described above, the cutting region of the cutting edge protruding beyond the side of the body thickness partially overlaps the cutting region of the adjacent unit cutter. As a result, according to the invention of claim 4, in addition to the effects of the inventions of claims 1 to 3, it is possible to prevent uncut streaks from being generated in the work material by cutting.
[0011]
Further, the structural feature of the invention according to claim 5 is that in the flat cutting cutter block according to any one of claims 1 to 4, the long groove is a spiral centered on the rotation axis. It is in shape.
In the invention of claim 5 configured as described above, since the long groove has a spiral shape with the rotation axis as the center, the cutting blades are also arranged in a spiral at intervals. Bite into the work material at slightly different times. As a result, in addition to the effects of the inventions of the first to fourth aspects, the cutting noise can be further reduced, and shocking fluctuations in cutting resistance can be avoided.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a plane cutting cutter block 10 according to the first embodiment in a front view, and FIG. 2 shows a plane cutting cutter block. The unit cutter 20 which comprises is shown by the side view and the front view.
[0013]
The unit cutter 20 is provided with a disk-shaped body 21 having a mounting hole 22 for mounting a rotating shaft at the center, and there are two diameter symmetrical positions with respect to the axis of the arc-shaped outer periphery 23 of the body 21. Blade bodies 24a and 24b that protrude slightly outward in the direction are provided. Tip seats 25a and 25b that are notched in an L shape are formed on the front sides of the blades 24a and 24b. The bottoms of the tip seats 25a and 25b are slightly closer to the axial center side than the outer periphery 23 of the body 21. It is indented. Further, cutting edge chips (cutting blades) 26a and 26b having blades made of a cutting edge material such as a high-hardness sintered body, cemented carbide, or ceramic are fixed to the chip seats 25a and 25b by brazing or the like.
[0014]
As shown in FIG. 2, the cutting blade tips 26a and 26b have a blade thickness T slightly larger than the thickness t of the body 21, and both sides in the blade thickness direction protrude from both surfaces of the blade bodies 24a and 24b. The cutting edges 26a and 26b have tips that are 0.5 to 5 mm higher in the radial direction than the outer periphery 23 of the body 21, and the axial end (the bottom of the chip seat) is more radial than the outer periphery 23 of the body 21. It is lowered by about 2 mm toward the axis.
[0015]
Blade chambers 27 a and 27 b are formed on the front side of the tip seats 25 a and 25 b of the body 21, following the tip seats 25 a and 25 b, by cutting the outer periphery 23 into a substantially arc shape in the radial direction. Furthermore, the outer periphery 23 of the body between the blade chambers 27a and 27b and the blade bodies 24b and 24a positioned in front of the rotation is provided at two equal intervals in a recess 28 that is radially cut out in a predetermined range in the circumferential direction. , 29 are formed. The recesses 28 and 29 have bottom portions 28a and 29a in the vicinity of the rotation front end. The recesses 28 and 29 are sharply recessed from the rotation front end to the bottom portions 28a and 29a, and the rotation rear end extends from the bottom portions 28a and 29a. It is a gentle dent. The positions of the bottom portions 28a and 29a are located at a central angle of about 60 ° with respect to the bottom portions of the blade chambers 27a and 27b. Moreover, the distance from the body 21 axis center of the bottom parts 28a and 29a of the hollows 28 and 29 is substantially the same as the distance from the body 21 axis center of the bottom part of the blade chambers 27a and 27b.
[0016]
A plurality of the unit cutters 20 are stacked, and each cutting edge tip 26a, 26b is disposed at a position facing the recess bottoms 28a, 29a on the rotation front side of the adjacent unit cutter 20, so that a plane as shown in FIG. A cutting cutter block is formed. Here, the blade chambers 27a and 27b and the recesses 28 and 29 of each unit cutter 20 are continuously inclined slightly with respect to the axial direction, and a plurality of long grooves S are formed on the outer peripheral surface of the plane cutting cutter block 10. Arranged in a spiral.
[0017]
In the first embodiment configured as described above, the amount of protrusion of the cutting edge from the outer periphery 23 of the body is limited to a range of 0.5 to 5 mm, so that the work material is excessively removed by the outer periphery 23 of the body 21. Can be controlled. Therefore, the occurrence of kickback of the work material can be prevented, and the danger of being caught greatly even if the operator accidentally contacts a part of the body such as the hand with the rotating blade tool can be avoided. Further, by limiting the upper limit of the amount of protrusion from the outer periphery 23 of the body of the cutting edge tips 26a, 26b, the overall shape of the cutter block 10 can be made closer to a cylindrical shape, and wind noise during rotation can be reduced. it can.
[0018]
Further, the cutting blades 26a and 26b between the adjacent unit cutters 20 are spaced apart from each other by two unit cutters in the axial direction, instead of stacking the cutting blades slightly shifted in the circumferential direction as in the prior art. Therefore, each of the cutting edge tips 26a and 26b independently protrudes from the outer periphery 23 and can prevent clogging of cutting waste between the cutting edges. In addition, by providing the long groove S that is continuous between the blade chambers 27a and 27b and the recesses 28 and 29, it is possible to improve the dischargeability of the cutting waste. In addition, since the long grooves S are stacked so as to be spiral, the cutting edge tips 26a and 26b are also arranged in a spiral shape with a space therebetween. By shifting the bite into the work material, cutting noise can be reduced and shocking fluctuations in cutting resistance can be avoided. Further, since the blade thickness of the cutting blade tips 26a and 26b is larger than the thickness of the body 21, the cutting region of the cutting blade portion protruding outward from the thickness of the body is partly the cutting region of the adjacent unit cutter 20. Since they overlap, it is possible to prevent uncut streaks from occurring in the work material during cutting.
[0019]
Next, a second embodiment will be described.
In the present embodiment, as shown in FIG. 3, the unit cutter 30 includes blade bodies 34 a to 34 c that protrude radially outward at three locations provided at equal intervals in the circumferential direction of the disk-shaped body 31. In addition, tip seats 35a to 35c cut out in an L-shape and cutting edge tips 36a to 36c brazed and fixed to the tip seats are provided on the front side of each blade body. The bottoms of the chip seats 35 a to 35 c are arranged slightly indented on the axial center side from the outer periphery 33 of the body 31. The arrangement relationship between the cutting blade tips 36a to 36c and the body 31 is the same as that in the first embodiment.
[0020]
Further, as shown in FIG. 3, blade chambers 37a to 37c are formed on the front side of the rotation of the tip seats 35a to 35c. Yes. Further, indentations 38a to 38c that are notched in the radial direction within a predetermined range in the circumferential direction are formed at intermediate positions between the blade chambers 37a to 37c and the blade bodies 34b, 34c, and 34a positioned in front of the blade chambers 37a to 37c. . The positional relationship between the blade chambers 37a to 37c and the recesses 38a to 38c and the body 31 is the same as that in the first embodiment.
[0021]
A plurality of the unit cutters 30 are stacked, and each cutting blade tip 36a to 36c is arranged at a position facing the bottom of the recess 38a to 38c on the rotation front side of the adjacent unit cutter 30, FIG. 4 (body development view). As shown in FIG. 3, a plane cutting cutter block 40 is formed. Here, the blade chambers 37a to 37c and the recesses 38a to 38c of each unit cutter 30 are continuously inclined slightly with respect to the axial direction, and a plurality of long grooves S are formed on the outer peripheral surface of the plane cutting cutter block 40. Arranged in a spiral.
In the second embodiment configured as described above, the same effect as in the first embodiment can be obtained. However, the number of cutting edge tips is increased by one, and the cutting processing accuracy is improved. Efficiency is increased.
[0022]
Next, a third embodiment will be described.
In the present embodiment, as shown in FIG. 5A, the unit cutter 50 is a blade that protrudes radially outward at four locations provided at equal intervals in the circumferential direction of the body 51 in a disk shape. 54a to 54d, tip seats 55a to 55d cut out in an L shape, and cutting blade tips 56a to 56d brazed and fixed to the tip seats are provided on the rotation front side of the blade bodies 54a to 54d. As shown in FIG. 5B, the cutting edge tips 56 a to 56 d are arranged so that one of the both sides alternately protrudes from the left and right side portions of the body 51. As a result, the width of the cutting edge tips 56a to 56d can be reduced, and the same effect as that obtained by slightly protruding the cutting edge chips from both sides of the body shown in the first and second embodiments can be obtained. can get. In addition, about the structure which makes only one of the both sides of a cutting-edge chip | tip protrude from both sides of a body alternately, it can apply also to the said 1st, 2nd embodiment. The positional relationship between the other cutting edge tips 56a to 56d and the body 51 is the same as that in the first embodiment.
[0023]
Further, blade chambers 57a to 57d are formed on the rotation front side of the tip seats 55a to 55d, following the tip seat, by cutting the outer periphery 53 into a substantially arc shape in the radial direction. Further, indentations 58a to 58d that are notched in the radial direction within a predetermined range in the circumferential direction are formed at intermediate positions between the blade chambers 57a to 57d and the blade bodies 54b, 54c, 54d, 54a positioned in front of the rotation. ing. The positional relationship between the blade chambers 57a to 57d, the recesses 58a to 58d, and the body 51 is the same as that in the first embodiment.
[0024]
A plurality of the unit cutters 50 are stacked, and each cutting blade tip 56a to 56d is arranged at a position facing the bottom of the recess 58a to 58d on the front side of the adjacent unit cutter 50 in FIG. 6 (body development view). As shown in FIG. 2, a plane cutting cutter block 60 is formed. Here, the blade chambers 57a to 57d and the recesses 58a to 58d of each unit cutter 50 are continuously inclined slightly with respect to the axial direction, and a plurality of long grooves S are formed on the outer peripheral surface of the plane cutting cutter block 60. Arranged in a spiral.
Even in the third embodiment configured as described above, the same effect as in the first embodiment can be obtained. However, the number of cutting edge tips is increased by two, and the cutting processing accuracy is improved. Efficiency is increased.
[0025]
In the above-described embodiment, the example in which the cutting edge tip is bonded to the blade body has been shown. Alternatively, the cutting edge tip may be detachably mechanically fixed to the blade body. In the above embodiment, the long groove is formed in a spiral shape with the rotation axis as the center. However, the long groove may be formed in a straight line parallel to the rotation axis. Furthermore, it is also possible to change the twist angle of the spiral long groove, the interval between the cutting edges in the direction of the rotation axis, and the side rake angle of the rake face of the cutting edge tip. It is also possible to reduce this. Further, the thickness t of the body is preferably 3 to 5 mm (in terms of noise prevention and manufacturing cost). Moreover, it is realistic on manufacture that the hollow between each blade body is less than 3 mm.
[0026]
In the above embodiment, the corners and corners of the inconvenient part of the cutter block may be chamfered to form roundness. Further, the specific shape and dimensions of the cutter block shown in the above embodiments are not limited to those described above.
[Brief description of the drawings]
FIG. 1 is a front view showing a plane cutting cutter block according to a first embodiment of the present invention.
FIGS. 2A and 2B are a side view and a front view showing a unit cutter of the flat surface cutting cutter block. FIGS.
FIGS. 3A and 3B are a side view and a front view showing a unit cutter of a plane cutting cutter block according to a second embodiment. FIGS.
FIG. 4 is a body development view showing the flat surface cutting cutter block.
FIGS. 5A and 5B are a side view and a front view showing a unit cutter of a plane cutting cutter block according to a third embodiment. FIGS.
FIG. 6 is a development view of the body showing the same plane cutting cutter block.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Plane cutting cutter block, 20 ... Unit cutter, 21 ... Body, 22 ... Mounting hole, 23 ... Outer periphery, 24a, 24b ... Blade body, 25a, 25b ... Tip seat, 26a, 26b ... Cutting blade tip, 27a , 27b ... blade chamber, 28, 29 ... depression, 28a, 29a ... bottom, 30 ... unit cutter, 31 ... body, 33 ... outer periphery, 34a-34c ... blade body, 36a-36c ... cutting edge tip, 37a-37c ... Blade chamber, 38a to 38c ... depression, 40 ... plane cutting cutter block, 50 ... unit cutter, 51 ... body, 53 ... outer periphery, 54a-54d ... blade body, 56a-56d ... cutting edge tip, 57a-57d ... Blade chamber, 58a-58d ... hollow, 60 ... plane cutting cutter block, S ... long groove.

Claims (5)

Two to six blade bodies are provided at equal intervals on the outer periphery of a disk-shaped body having a mounting hole into which a rotating shaft is inserted, and a plurality of single cutters each having a cutting blade fixed thereto are coaxially arranged on the blade body A flat cutting cutter block integrated and integrated,
The unit cutter is provided in the body with a blade chamber that is continuously recessed in the radial direction in front of the blade body, and the next blade body provided on the front side of the rotation from the blade chamber. In the middle of the outer periphery of the body extending to the bottom, there is provided at least one recess whose bottom is approximately the same distance from the bottom of the blade chamber and the axis of the body, and the cutting radius of each cutting blade is the outer periphery of the body Configured to be 0.5-5 mm larger than the radius of
A plurality of the unit cutters are stacked in a state where the respective cutting blades are arranged at positions facing the recesses of the adjacent unit cutters, and the blade chambers and the recesses of the plurality of unit cutters are made continuous so that the outer peripheral surface A plane cutting cutter block, characterized in that a plurality of long grooves are provided on the surface. The cutter block for plane cutting according to claim 1, wherein an end of the cutting edge on the body axis side is disposed at a position on the axis side of the body with respect to an outer periphery of the body. Characteristic cutter block for surface cutting. The planar cutting cutter block according to claim 1 or 2, wherein the cutting edge of each unit cutter is disposed at or near the bottom of a recess of the adjacent unit cutter. Cutter block for use. The flat cutting cutter block according to any one of claims 1 to 3, wherein a cutting edge thickness of the cutting blade is larger than a thickness of the body. 5. The flat cutting cutter block according to claim 1, wherein the long groove has a spiral shape centered on the body axis. block.

Images