JP2017127972A - Circular saw machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress cut bending of a circular saw blade 19 during cutting and enhance a process tolerance of a cut surface of a work-piece W irrespective of a size of a width of the work-piece W.SOLUTION: A circular saw machine 1 comprises: a processing head 21 having a circular saw blade 19 which is movable in a cutting direction D1 and an opposite direction D2 thereof and is rotatable; and a movable saw blade guide set 69 which is so provided on the processing head 21 as to be movable in the cutting direction D1 and the opposite direction D2, and so guides as to hold a shank 19b of the circular saw blade 19 on a radial direction inner side of a cutting area 19A in the circular saw blade 19. The movable saw blade guide set 69 is so configured as to move relatively to the processing head 21 in the opposite direction D2 in association with movement of the processing head 21 in the cutting direction D1 when cutting of a work-piece W is advanced.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a circular saw machine that performs a cutting process on a part to be cut of a workpiece.

  In recent years, various developments have been made on circular saw machines, and a general configuration of a conventional circular saw machine will be briefly described as follows (see Patent Document 1 and the like).

  A conventional circular saw machine includes a machining head having a rotatable circular saw blade, and the machining head is movable in a cutting direction for cutting a workpiece and in the opposite direction. A region located on the cutting direction side of the circular saw blade is a cutting region having a cutting action. Further, the machining head is provided with a pair of fixed saw blade guide sets that guide it so as to sandwich the body of the circular saw blade on both sides of the cutting area of the circular saw blade at an appropriate position (appropriate position of the machining head). . The pair of fixed saw blade guide sets are separated from each other in a direction orthogonal to the cutting direction. Usually, the interval between the pair of fixed saw blade guide sets in the orthogonal direction is the maximum workpiece width (maximum width) to be cut. The interval is set according to.

JP-A-9-85527

  By the way, when the space | interval of the said orthogonal direction of a pair of fixed saw blade guide set is set as mentioned above and cuts with respect to the to-be-cut | disconnected part of a workpiece | work with a small width | variety, fixed saw blade guide set The distance between the workpiece and the workpiece to be cut becomes large, and the rigidity of the cutting area in the circular saw blade cannot be secured sufficiently. Therefore, the circular saw blade is likely to be bent during the cutting process, and the processing accuracy (surface accuracy) of the cut surface of the workpiece may be reduced.

  That is, regardless of the width (size) of the workpiece, there is a problem that it is difficult to increase the processing accuracy of the cut surface of the workpiece by suppressing the bending of the circular saw blade during the cutting processing.

  Therefore, an object of the present invention is to provide a circular saw machine having a novel configuration that can solve the above-described problems.

  One aspect of the present invention includes a machining head having a circular saw blade that is movable in a cutting direction that gives a cut to the workpiece and the opposite direction thereof, and a rotating circular saw blade, and the cutting direction and the opposite direction ( The circular saw blade body is sandwiched in the radial inner side of the circular saw blade (inner radial direction of the circular saw blade) provided so as to be movable in the radial direction of the circular saw blade. A movable saw blade guide set for guiding the movable saw blade guide set in the opposite direction in conjunction with the movement of the machining head in the cutting direction when the cutting into the workpiece progresses. The gist is that it is configured to move relative to the machining head. Also, in one aspect of the present invention, the processing head is spaced apart in a direction perpendicular to the cutting direction, and the body portion of the circular saw blade is sandwiched between both sides of the cutting region (both sides in the orthogonal direction). It is desirable to provide a pair of fixed saw blade guide sets for guiding the above.

  According to an aspect of the present invention, the processing head is moved in the cutting direction while the circular saw blade is rotated. Then, the workpiece can be cut by the circular saw blade, and the workpiece can be cut.

  Here, until the start of cutting into the workpiece (immediately after the start of cutting), the movable saw blade guide set guides the circular saw blade so as to sandwich the body portion of the circular saw blade in the radial inside of the cutting region. Thereby, the swing of the circular saw blade when the circular saw blade enters the workpiece (when cutting into the workpiece is started) can be suppressed regardless of the width (size) of the workpiece.

  As the cutting into the workpiece progresses, the movable saw blade guide set moves relative to the machining head in the opposite direction in conjunction with the movement of the machining head in the cutting direction. Thereby, the movable saw blade guide set does not hinder the workpiece cutting process.

  According to the present invention, as described above, the circular saw blade can be prevented from swinging when the circular saw blade enters the workpiece regardless of the width of the workpiece. Therefore, according to the present invention, regardless of the width of the workpiece, it is possible to suppress the bending of the circular saw blade during the cutting process and increase the machining accuracy of the cut surface of the workpiece.

FIG. 1 is a schematic front view of a circular saw machine according to an embodiment of the present invention. FIG. 2 is an enlarged view of the arrow II in FIG. FIG. 3 is a diagram showing a main part of the embodiment of the present invention, and shows a state in which the front side of the case body is opened by the case lid. FIG. 4 is an enlarged view taken along line IV-IV in FIG. FIGS. 5A and 5B are diagrams for explaining the operation of the movable saw blade guide set and the like according to the embodiment of the present invention. FIG. 6 is a diagram showing a main part of a first modification of the embodiment of the present invention, and shows a state in which the front side of the case body is opened by the case lid. FIGS. 7A and 7B are views for explaining the operation of the movable saw blade guide set and the like according to the first modification of the embodiment of the present invention. FIG. 8 is a diagram showing a main part of a second modification of the embodiment of the present invention, and shows a state where the front side of the case body is opened by the case lid. FIGS. 9A and 9B are diagrams for explaining the operation of the movable saw blade guide set and the like according to the second modification of the embodiment of the present invention.

  An embodiment (including a first modification and a second modification) of the present invention will be described with reference to the drawings.

  In the specification and claims of the present application, “provided” means not only being provided directly but also indirectly provided via a separate member, Is synonymous. “Providing” means to provide indirectly through another member in addition to providing directly, and is synonymous with “providing”. The “radial direction” refers to the radial direction of the circular saw blade, and the “radial inner side” refers to the radial inner side of the circular saw blade. “Cutting position” refers to a position in the transport direction where cutting is performed. In the drawings, “FF” is the forward direction (conveying direction), “FR” is the backward direction, “L” is the left direction, “R” is the right direction, “U” is the upward direction, and “D”. Indicates the downward direction.

(Embodiment)
The circular saw machine 1 according to the embodiment of the present invention performs a cutting process on a portion to be cut of a bar-shaped workpiece W positioned at a cutting position in a conveying direction (forward direction). And the structure of the circular saw machine 1 which concerns on embodiment of this invention is as follows.

  As shown in FIGS. 1 and 2, the circular saw 1 is provided on a base (bed) 3 extending in the transport width direction (left-right direction) orthogonal to the transport direction and on the left part of the upper surface of the base 3. The support frame 5 is provided. The support frame 5 has an inclined surface 5f that is inclined with respect to the horizontal direction (left-right direction).

  The base 3 includes a main body vice 7 for fixing the workpiece W to the base 3 on the upstream side (right upstream in the transport direction) of the cutting position on the upper surface (the upper surface of the base 3). Yes. The main body vise 7 has a vise bed (processing table) 9 that is provided on the upper surface of the base 3 and supports the workpiece W. The vise bed 9 includes a fixed vise jaw 11 on the left side of the upper surface (the upper surface of the vise bed 9). The vice bed 9 includes a movable vise jaw 13 that clamps the workpiece W in cooperation with the fixed vise jaw 11 on the upper surface thereof, and the movable vise jaw 13 is movable in the conveyance width direction. The vice bed 9 includes a hydraulic vise cylinder 15 that moves the movable vise jaw 13 in the conveyance width direction on the right side of the upper surface thereof.

  The base 3 includes a transport table (not shown) that supports the workpiece W so as to be movable in the transport direction on the rear side (the rear side of the base 3). Further, the transport table includes a transport vise (not shown) that transports the workpiece W in the transport direction at an appropriate position (appropriate position of the transport table).

  The support frame 5 is provided with a plurality of guide rails 17 (only one is shown) extending in the inclined direction on the inclined surface 5f. The plurality of guide rails 17 include a machining head 21 having a rotatable circular saw blade 19 between them (between the plurality of guide rails 17). The circular saw blade 19 has a disc-shaped body portion 19b and a plurality (a large number) of cutting teeth 19t provided on the outer peripheral surface of the body portion 19b. Here, a region located on the cutting direction D1 side in the circular saw blade 19 is a cutting region 19A that exhibits a cutting action.

  The machining head 21 is guided by a corresponding guide rail 17 on the lower surface (lower surface of the machining head 21) in the cutting direction (one side in the inclined direction) D1 and the opposite direction (the other side in the inclined direction) D2. A guided member 23 is provided. In other words, the machining head 21 is provided on the inclined surface 5f of the support frame 5 so as to be movable in the cutting direction D1 and the opposite direction D2 via the plurality of guide rails 17 and the plurality of guided members 23.

  The support frame 5 includes a processing head electric motor 25 as a processing head actuator for moving the processing head 21 in the cutting direction D1 and the opposite direction D2 on the upper portion of the support frame 5. The output shaft (not shown) of the machining head electric motor 25 is linked to the machining head 21 via a ball screw (not shown) and a nut member (not shown). A hydraulic machining head cylinder (not shown) may be used as the machining head actuator.

  As shown in FIGS. 2 to 4, the machining head 21 includes a movable box 27 provided on the inclined surface 5 f of the support frame 5 so as to be movable in the cutting direction D <b> 1 and the opposite direction D <b> 2, and a lower portion of the movable box 27. And a saw blade case 29 for accommodating a part of the circular saw blade 19. The saw blade case 29 is provided at a lower portion of the movable box 27 with a case main body 31 and a plurality of hinges (hinges) 33 provided on the case main body 31, and the front side of the case main body 31 can be opened and closed. A case lid (case cover) 35 is provided. The case lid 35 has a shape that approximates the case main body 31.

  The case main body 31 has a first rib 37 on the upper side of the inner side surface (the inner side surface of the case main body 31), and most of the first rib 37 is L-shaped when viewed from the front. . The case main body 31 has an insertion hole 39 at the center (the center of the case main body 31). Further, the case lid 35 has a second rib 41 at the upper part of the inner side surface (the inner side surface of the case lid 35), and the front view of most of the second rib 41 is L-shaped. ing. The second rib 41 is integrally joined to the first rib 37 by a plurality of bolts 43. In other words, the case lid 35 is integrally joined to the case main body 31 by the plurality of bolts 43 with the front side of the case main body 31 closed.

  The movable box 27 includes a main shaft 45 inside the movable box 27 via a bearing 47 or the like, and the main shaft 45 can rotate around its axis (axis of the main shaft 45). ing. The front end portion of the main shaft 45 is inserted through an insertion hole 39. The circular saw blade 19 is fixed to the front end portion of the main shaft 45 by a bolt 51 with a pair of mounting flanges (mounting plates) 49 interposed therebetween. ing.

  The movable box 27 is provided with an electric motor 53 for a saw blade for rotating the circular saw blade 19 at an upper portion thereof. Further, the output shaft (not shown) of the saw blade electric motor 53 is linked to the main shaft 45 via a gear mechanism (not shown) and a belt mechanism (not shown) provided in the movable box.

  The saw blade case 29 is a pair of fixed saw blades that guide the saw blade case 29 at appropriate positions (appropriate positions of the saw blade case 29) so as to sandwich the body portion 19b of the circular saw blade 19 on both sides of the cutting region 19A of the circular saw blade 19. A guide set 55 is provided. The pair of fixed saw blade guide sets 55 are separated in a direction perpendicular to the cutting direction D1.

  Each fixed saw blade guide set 55 is in contact with the first bracket 57 fixed to the inner surface of the case body 31 and the back surface of the body portion 19b of the circular saw blade 19 provided at the tip of the first bracket 57. First fixed insert 59. The first fixed insert 59 is made of a hard material such as carbide. Further, each fixed saw blade guide set 55 is provided on the surface of the second bracket 61 fixed to the inner surface of the case lid 35 and the body 19b of the circular saw blade 19 provided at the tip of the second bracket 61. It has the 2nd fixed insert 63 which can contact. The second fixed insert 63 is made of a hard material such as carbide.

  The case main body 31 includes a pair of first slide guides 65 extending in the cutting direction D1 on the inner side surface (inner side surface of the case main body 31), and each first slide guide 65 has an L-shaped cross section. It has become. Similarly, the case lid 35 includes a pair of second slide guides 67 extending in the cutting direction D1 on its inner side surface (inner side surface of the case lid 35). It has a letter shape.

  The saw blade case 29 has a body portion 19b of the circular saw blade 19 between the pair of fixed saw blade guide sets 55 on the radially inner side of the cutting area 19A of the circular saw blade 19 (the radially inner side of the circular saw blade 19). A movable saw blade guide set 69 is provided for guiding so as to be sandwiched. The movable saw blade guide set 69 is movable in the cutting direction D1 and the opposite direction D2 via the pair of first slide guides 65 and the pair of second slide guides 67.

  The movable saw blade guide set 69 has a first movable plate 71 provided on the inner side surface of the case main body 31 so as to be movable in a cutting direction D1 and an opposite direction D2 via a pair of first slide guides 65. The first movable plate 71 is formed with a first notch 73 for inserting the mounting flange 49, and the first movable plate 71 is not in contact with the mounting flange 49. The movable saw blade guide set 69 has a first movable insert 75 that is provided at the tip of the first movable plate 71 and that can contact the back surface of the body portion 19 b of the circular saw blade 19. The first movable insert 75 is made of, for example, a hard material such as cemented carbide.

  The movable saw blade guide set 69 has a second movable plate 77 provided on the inner surface of the case lid 35 via a pair of second slide guides 67 so as to be movable in the cutting direction D1 and the opposite direction D2. The second movable plate 77 is formed with a second notch 79 for inserting the mounting flange 49, and the second movable plate 77 is not in contact with the mounting flange 49. The movable saw blade guide set 69 has a second movable insert 81 that is provided at the tip of the second movable plate 77 and can contact the surface of the body 19 b of the circular saw blade 19. The second movable insert 81 is made of a hard material such as carbide.

  The case main body 31 includes a first stopper 83 that restricts the movement of the first movable plate 71 in the cutting direction D1 at an appropriate position on the inner side surface (the inner side surface of the case main body 31). The case body 31 includes a first spring 85 as a first urging member for urging the first movable plate 71 in the cutting direction D1 (on the first stopper 83 side) at the upper part of the inner side surface.

  The case lid 35 includes a second stopper 87 that restricts the movement of the second movable plate 77 in the cutting direction D1 at an appropriate position on the inner side surface (the inner side surface of the case lid 35). In addition, the case lid 35 includes a second spring 89 as a second urging member that urges the second movable plate 77 in the cutting direction D1 (second stopper 87 side) at the upper part of the inner side surface thereof.

  In other words, the saw blade case 29 includes stoppers 83 and 87 that restrict the movement of the movable saw blade guide set 69 in the cutting direction D1 at an appropriate position on the inner side surface (the inner screen of the saw blade case 29). . In addition, the saw blade case 29 includes springs 85 and 89 as biasing members that bias the movable saw blade guide set 69 in the cutting direction D1 at the upper part of the inner side surface thereof. Instead of the saw blade case 29 having the stoppers 83 and 87, the movable saw blade guide set 69 is moved in the cutting direction D1 to a part of the fixed saw blade guide set 55 (the first bracket 57 and the second bracket 61). A function to regulate may be added.

  As shown in FIGS. 5A and 5B, the movable saw blade guide set 69 is attached with the springs 85 and 89 while maintaining a predetermined contact state when the circular saw blade 19 is cut into the workpiece W. It is configured to move relative to the machining head 21 in the opposite direction D2 while resisting the force. Here, the predetermined contact state is a state in which the first movable insert 75 and the second movable insert 81 are in contact with the workpiece W, as well as a contact member provided in the movable saw blade guide set 69 ( (Not shown) includes a state in which the workpiece W or a fixed portion such as the fixed vise jaw 11 is in contact with the fixed portion.

  Note that when the front side of the case body 31 is closed by the case lid 35, the second movable plate 77 may be integrally connected to the first movable plate 71 by a connection pin (not shown) or the like. In this case, any one of the first spring 85 and the second spring 89 may be omitted.

  Then, the effect | action and effect of embodiment of this invention are demonstrated.

  After the work W is carried into the transport table, the work W is transported in the transport direction by the transport vise, and the part to be cut of the work W is positioned at the cutting position. Then, by moving the movable vise jaw 13 to the left by driving the vise cylinder 15, the work W is clamped by the cooperation of the fixed vise jaw 11 and the movable vise jaw 13. Thereby, the workpiece W can be fixed to the base 3.

  After the workpiece W is fixed to the base 3, the circular saw blade 19 is rotated through the gear mechanism and the belt mechanism by driving the saw blade electric motor 53. Then, the machining head 21 is moved in the cutting direction D <b> 1 by driving the machining head electric motor 25. Thereby, it can cut | disconnect with respect to the to-be-cut | disconnected part of the workpiece | work W, and can take out a product (illustration omitted) from the workpiece | work W. FIG. During the cutting process, a pair of fixed saw blade guide sets 55 guides the body 19b of the circular saw blade 19 so as to be sandwiched on both sides of the cutting area 19A of the circular saw blade 19.

  Here, as shown in FIG. 5A, the movable saw blade guide set 69 is in the radial direction of the cutting region 19A in the circular saw blade 19 until the circular saw blade 19 starts to cut into the workpiece W (immediately after the start of cutting). It guides so that the trunk | drum 19b of the circular saw blade 19 may be pinched | interposed inside. Thereby, regardless of the width (size) of the workpiece W, the swing of the circular saw blade 19 when the circular saw blade 19 enters the workpiece W (when cutting into the workpiece W is started) can be suppressed. it can.

  As shown in FIG. 5B, when the circular saw blade 19 is cut into the workpiece, the movable saw blade guide set 69 resists the urging force of the springs 85 and 89 while maintaining a predetermined contact state. It moves relative to the machining head 21 in the opposite direction D2. Thereby, the movable saw blade guide set 69 does not interfere with the cutting process.

  After cutting, the machining head 21 is moved in the opposite direction D2 by driving the machining head electric motor 25. Then, the machining head 21 moves away from the workpiece W, and the movable saw blade guide set 69 moves relative to the machining head 21 in the cutting direction D1 by the urging force of the springs 85 and 89. Thereby, the process head 21 and the movable saw blade guide set 69 can be returned to the state before the cutting process.

  By repeating the above-described operation, a plurality of products can be taken out from the workpiece W by cutting the plurality of parts to be cut of the workpiece W.

  As described above, according to the embodiment of the present invention, the swing of the circular saw blade 19 when the circular saw blade 19 enters the workpiece W can be suppressed regardless of the width of the workpiece W. Therefore, according to the embodiment of the present invention, the cutting accuracy of the cut surface of the workpiece W can be improved by suppressing the bending of the circular saw blade 19 during the cutting processing regardless of the width of the workpiece W.

(First Modification of Embodiment)
As shown in FIGS. 6 and 7A, in the first modification of the embodiment of the present invention, the springs 85 and 89 provided on the upper part of the inner surface of the saw blade case 29 are omitted. The case body 31 has a first movable plate as an actuator for the first movable plate that moves the first movable plate 71 relative to the machining head 21 in the cutting direction D1 and the opposite direction D2 at the upper part of the inner side surface. Cylinder 91 is provided. The case lid 35 has a second movable plate as an actuator for a second movable plate that moves the second movable plate 77 relative to the machining head 21 in the cutting direction D1 and the opposite direction D2 at the upper part of the inner surface thereof. Cylinder 93 is provided.

  In other words, the saw blade case 29 includes a first movable plate cylinder 91 and a second movable plate cylinder 93 in place of the springs 85 and 89 at the upper portion of the inner surface thereof. Note that a first movable plate electric motor (not shown) and a second movable plate electric motor (not shown) may be used as the first movable plate actuator and the second movable plate actuator.

  As shown in FIG. 7A, in the first modification of the embodiment of the present invention, the movable saw blade guide set 69 is cut by the circular saw blade 19 until the circular saw blade 19 starts to cut into the workpiece W. It guides so that the trunk | drum 19b of the circular saw blade 19 may be pinched | interposed in the radial inside of the area | region 19A. Thereby, regardless of the width (size) of the workpiece W, the swing of the circular saw blade 19 when the circular saw blade 19 enters the workpiece W can be suppressed.

  As shown in FIG. 7B, immediately after the start of the cutting into the workpiece by the circular saw blade 19, the movable saw blade guide set 69 (the first saw blade 91) is driven by the driving of the first movable plate cylinder 91 and the second movable plate cylinder 93. The movable plate 71 and the second movable plate 77) are moved relative to the machining head 21 in the opposite direction D2. Thereby, the 1st movable insert 75 and the 2nd movable insert 81 do not contact | abut to the workpiece | work W. FIG. Further, the movable saw blade guide set 69 does not interfere with the cutting process.

  After cutting, the movable saw blade guide set 69 (first movable plate 71 and second movable plate 77) is moved to the machining head 21 in the cutting direction D1 by driving the first movable plate cylinder 91 and the second movable plate cylinder 93. Move relative to it. Thereby, the movable saw blade guide set 69 can be returned to the state before the cutting process.

  If the second movable plate 77 is integrally connected to the first movable plate 71 when the front side of the case body 31 is closed by the case lid 35, the first movable plate cylinder 91 and Any one of the second movable plate cylinders 93 may be omitted.

  And in the 1st modification of embodiment of this invention, there exists an effect similar to the effect of embodiment of the above-mentioned this invention.

(Second Modification of Embodiment)
As shown in FIGS. 8 and 9A, in the second modification of the embodiment of the present invention, the movable saw blade guide set 69 is divided in a direction orthogonal to the cutting direction D1. In other words, the movable saw blade guide set 69 is composed of a pair of divided saw blade guide sets 69S divided in the orthogonal direction.

  Specifically, the first movable plate 71 includes a pair of divided movable plates 71S divided in the orthogonal direction. The 1st movable insert 75 is comprised by a pair of division | segmentation movable insert 75S divided | segmented in the said orthogonal direction. The second movable plate 77 includes a pair of divided movable plates 77S divided in the orthogonal direction. The second movable insert 81 includes a pair of divided movable inserts 81S divided in the orthogonal direction.

  The movement in the cutting direction D <b> 1 of each divided movable plate 71 </ b> S is restricted by a first stopper 83 provided at an appropriate position on the inner side surface of the case main body 31. Each split movable plate 71 </ b> S is biased in the cutting direction D <b> 1 (first stopper 83 side) by a first spring 85 provided at the upper part of the inner side surface of the case body 31. Further, the movement of each divided movable plate 77 </ b> S in the cutting direction D <b> 1 is restricted by a second stopper 87 provided at an appropriate position on the inner surface of the case lid 35. Each split movable plate 77S is urged in the cutting direction D1 (second stopper 87 side) by a second spring 89 provided at the upper part of the inner side surface of the case lid 35.

  As shown in FIG. 9A, in the second modification of the embodiment of the present invention, the movable saw blade guide set 69 is cut by the circular saw blade 19 until the circular saw blade 19 starts to cut into the workpiece W. It guides so that the trunk | drum 19b of the circular saw blade 19 may be pinched | interposed in the radial inside of the area | region 19A. Thereby, it is possible to suppress the swing of the circular saw blade 19 when the circular saw blade 19 enters the workpiece W.

  As shown in FIG. 9B, when the cutting (cutting) into the workpiece by the circular saw blade 19 proceeds when the width (size) of the workpiece W is small, only one of the divided saw blade guide sets 69S has the springs 85 and 89. It moves relative to the machining head 21 in the opposite direction D2 against the urging force. At this time, the other divided saw blade guide set 69S guides the body portion of the circular saw blade 19 to be sandwiched inside the cutting region 19A in the circular saw blade 19 in the radial direction.

  And in the 2nd modification of embodiment of this invention, the effect of embodiment of the above-mentioned this invention can further be heightened.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, It can implement in a various aspect as follows. For example, the cutting direction D1 of the machining head 21 may be a horizontal direction or a vertical direction (vertical direction) instead of a direction inclined with respect to the horizontal direction. The fixed saw blade guide set 55 may be omitted from the configuration of the circular saw machine 1. The scope of rights encompassed by the present invention is not limited to the above-described embodiment.

D1 Cutting direction D2 Opposite direction W Work 1 Circular saw 3 Base 5 Support frame 5f Inclined surface 7 Vise 19 Circular saw blade 19A Cutting area

Claims (6)

A machining head having a circular saw blade which is movable in a cutting direction for giving a cut to the workpiece and in the opposite direction, and is rotatable;
A movable saw blade that is provided in the machining head so as to be movable in the cutting direction and the opposite direction, and guides the body of the circular saw blade so as to sandwich the body portion of the circular saw blade in the radial direction inside the cutting region that performs the cutting action of the circular saw blade A guide set,
The movable saw blade guide set is configured to move relative to the machining head in the opposite direction in conjunction with the movement of the machining head in the cutting direction as the cutting into the workpiece progresses. A circular saw machine characterized by   The machining head is provided with a pair of fixed saw blade guide sets that are provided apart from each other in a direction perpendicular to the cutting direction and guide the cylindrical saw blade so as to sandwich the body of the circular saw blade on both sides of the cutting region. The circular saw machine according to claim 1. A stopper for restricting movement of the movable saw blade guide set in the cutting direction with respect to the processing head;
The circular saw machine according to claim 1, further comprising an urging member that urges the movable saw blade guide set in the cutting direction.   The circular saw machine according to claim 1 or 2, further comprising an actuator that moves the movable saw blade guide set relative to the machining head in the cutting direction and in the opposite direction.   The circular saw machine according to any one of claims 1 to 4, wherein the movable saw blade guide set is divided in a direction orthogonal to the cutting direction. The processing head includes a saw blade case that accommodates the circular saw blade, and the saw blade case includes a case main body, and a case lid that is provided on the case main body and that can open and close the front side of the case main body. Have
The movable saw blade guide set is provided on the inner side surface of the case main body so as to be movable in the cutting direction and the opposite direction, and can contact the back surface of the body of the circular saw blade, and the case The second movable insert provided on the inner surface of the lid so as to be movable in the cutting direction and the opposite direction and capable of contacting the surface of the body of the circular saw blade. The circular saw machine according to any one of items 5 to 5.

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