JP2018069351A - Method and device for forming slit for fitting of saw-tooth tip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly and efficiently perform formation of a slit for fitting a tip to a saw plate.SOLUTION: According to this method, an original tooth 15, which comprises irregularities of a tooth tip part 15b and a tooth bottom part 15a, is punched and formed at one end of a saw plate 3 in a width direction, and thereafter, a slit 10b, in which a saw-tooth tip 5 is inserted, fitted and fixed, is punched and formed on the tooth tip part 15b side. A press device 1 comprising a punch 29 for punching and a die 19, in which a contour of a punching blade 51 of the punch 29, which is inserted in a punching hole 52 on the die 19 side, comprises a wide preliminary punching blade 51b which punches a preliminary punching part 10a on the tooth tip part side of the saw plate 3, and a slit punching blade 51c which projects toward a tooth root side with respect to the preliminary punching blade 51b on the tooth tip side in a plan view, and which punches a narrow slit 10b in which the saw-tooth tip 5 is inserted and fixed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method and an apparatus for forming a slit for mounting a sawtooth tip.

  Conventionally, as shown in Patent Document 1, for example, the present inventors have proposed a method in which a sawtooth tip is inserted and fitted so as to be detachable and replaceable, and this is a tooth formed on the sawboard 1 side. A receiving groove 11 is formed at the tip of the portion 2 by grinding, and a chip 8 in which insertion grooves 8a and 8b having a saw blade thickness are formed on the front and rear sides of the receiving groove 11 is inserted and fixed.

  On the other hand, in the case of a band saw, the conventional tooth portion is generally formed by sequentially punching with a punching die provided with a series of tooth dies comprising a predetermined number of irregularities (tooth tip portion and tooth root portion) on one side of the band saw plate. For example, as shown in Patent Document 2, it is also known that a double-sided plate is punched by continuously forming a symmetrical tooth profile at the center of a double-width plate material, and two band saws are simultaneously punched.

Japanese Patent Laying-Open No. 2015-217475 JP-A-5-104328

As described above, the original tooth consisting of the tooth tip and the bottom before forming the receiving groove (slit) for mounting the sawtooth chip is punched and formed by pressing, but the chip mounting slit is a groove-type polishing. It was formed by grinding with a grindstone. The reason is that slits for hard steel materials of about 450 to 500 (HV) are made simultaneously with the formation of the punching of the original teeth. This is because if the punching portion is added and used, there is a problem that the slit punching blade is lost during punch punching.
However, if the slit is ground with a grinder or the like as described above, it is difficult and non-uniform to form the width and depth of the slit, and there is a problem in the fixability and stability of the chip. Therefore, there is a drawback that the work efficiency is extremely poor and the cost is high.

  In the method and apparatus of the present invention for solving the above-mentioned problems, first, after forming the original tooth 15 formed by the unevenness of the tooth tip portion 15b and the tooth bottom portion 15a at one end in the width direction of the saw blade 3, The slit 10b for inserting and fixing the sawtooth tip 5 on the tooth tip 15b side is formed by punching.

  Secondly, the punching portion 10 when the slit 10b is punched and formed has a wide preliminary extraction portion on the tooth tip side and a narrow width that continuously enters from the preliminary extraction portion 10a toward the center of the saw blade 3 in the width direction. It comprises a slit 10b, and is characterized in that punching and cutting is started from the preliminary punching portion 10a when punching is formed, and then the slit 10b is continuously punched and cut.

  Thirdly, in the press device 1 including the punching punch 29 and the die 19, the outer shape of the punching blade 51 of the punch 29 inserted into the punching hole 52 on the die 19 side is the tooth tip portion of the saw plate 3. Wide preliminary punching blade 51b for punching the side preliminary punching portion 10a, and a narrow width that protrudes toward the tooth base side from the preliminary punching blade 51b on the tooth tip side in plan view, and inserts and fixes the sawtooth tip 5 And a slit punching blade 51c for punching the slit 10b.

  Fourthly, the punching end surfaces of the preliminary punching blade 51b and the slit punching blade 51c are formed in a continuous surface, and the punching end surface is set so as to start punching and cutting from the preliminary punching blade 51b at the time of punching formation. It is characterized in that it is inclined in a direction rising from the preliminary punching blade 51b toward the slit punching blade 51c.

  Fifthly, in a plan view, it is a cross-section that is continuous with the cross-section outside the tooth tip of the preliminary punching blade 51b and protrudes downward from the punching end surface of the preliminary punching blade 51b. Is provided with a punch guide portion 51a that is always inserted through the die 19 and guides the positioning of the punch 29 with respect to the die 19.

  Sixth, the die 19 and the punch 29 are provided at fixed positions, respectively, and the punch plate 17 and the die plate 16 which are elastically stroked within a predetermined stroke S range via the stroke guide 23 and the spring 26 between them are combined. The die plate 16 is configured to be detachably mounted on the press base 4.

  Seventh, a press apparatus 1 having a positioning mechanism for positioning the saw blade 3 in a three-dimensional direction with respect to the punch 29 and the die 19 during the punching operation of the slit 10b, is inserted into the press apparatus 1 in the horizontal direction. It is characterized in that a positioning pin 48 for standing and locking the base tooth 15 formed on the saw plate 3 is provided.

  Eighth, the positioning pin 48 is provided so as to be detachably inserted on the die 19 or the die plate 16.

  Ninth, it is characterized in that a presser 46 is provided which presses the saw plate 3 during the punching operation of the slit 10b and restricts the vertical movement thereof so that the punch 29 can be punched and removed stably.

  Tenth, a press lever 7 whose front and rear ends are moved up and down in an upside down direction is pivotally supported on the press base 4 by a fulcrum shaft 8, and the punch 29 side is pressed below a proximity position on the front end side of the press lever 7. The actuator 13 that is arranged in a possible manner and that drives the rear end of the press lever (7) to push up and drives the punch 29 at the front end of the press lever 7 is provided below the rear end side.

  Eleventh, a roller 11 that is pressed against the punch plate 17 side when the press lever is driven to drive the punch plate 17 downward is pivotally supported on the front end side of the press lever 7.

The invention configured as described above has the following effects.
(1) In the method of the present invention, since the slit part is punched after the original tooth consisting of the tooth tip part and the tooth bottom part is processed, the punched part of the punch that processes the narrow slit part is concentrated load, etc. Punch slit punching by starting punching the saw blade punching part from the wide preliminary cutting part on the tooth tip side, and punching while continuously moving to the narrow slit part The overload on the part is further reduced, and the punched part of the punch can be prevented from being damaged.

(2) As a result, it is possible to perform punching with a press for slitting for chip attachment, so that the dimensional accuracy and positional accuracy of the slit are remarkably increased, and the machining operation is also made more efficient.
In the band saw slit processing, the original tooth part punching die and the slit punching die are placed close to the front and back of the line and sequentially punched by a single feeding operation in one cycle. The original teeth and slits can be punched. In this case, it is also possible to attach the mold for the original tooth and the mold for the slit to a single ram.

(3) In the apparatus of the present invention, the narrow punching blade of the punch is integrally formed along the wide preliminary punching blade according to the slit width, so that the slit punching blade is reinforced. In addition to further preventing damage during slit punching formation, there is an advantage that the saw plate around the slit portion is less deformed by punching than when only the slit is punched and formed.
In addition, by inclining the punching end surface from the preliminary punching blade to the slit punching blade as a continuous surface, punching and cutting starts from the wide preliminary punching blade, and the cutting action is continuously performed on the slit side. Since the transition is made, the slit plate is smoothly removed, and an excessive load is not applied to the slit punching blade.

(4) The punch guide part protruding from the tip of the punch has the effect of reinforcing the slit punching blade together with the preliminary punching blade, and the punch guide for the die is more accurate and the punching and cutting action of the slit is stable. .
In addition, since the punch and die are unitized, the user only needs to replace each unit when replacing the mold, and there is no need to attach or remove the punch or the die itself. Since it can be attached to and removed from the position, it does not require advanced experience for mold replacement and maintenance, and can also save labor.

(5) Since the press that strokes the punch to the die requires only a simple press lever and actuator, it does not require a large prime mover or mechanism, and the entire press can be miniaturized, making it easy to move and transport. Installation on an existing work table is also easy.

It is a whole perspective view which shows the installation state of this invention apparatus. It is a disassembled perspective view which shows the press apparatus of this invention. It is a disassembled perspective view of the punching type unit used for this invention. (A) and (B) are perspective views of a punch and a die, respectively. (A)-(C) are the front view of a punch, a side view, and a bottom view, respectively. It is a top view which shows the punching work state of the slit by this invention apparatus. It is an enlarged plan view which shows the positional relationship in operation | movement of the sawtooth and die | dye in the method of this invention. It is an enlarged plan view which shows the attachment method of the chip | tip with respect to the sawtooth used as the object of this invention.

  FIG. 1 shows an embodiment of the present invention, and FIG. 1 shows a state in which a press device 1 for punching a saw blade tip mounting slit (mounting groove) such as a band saw of the present invention is mounted on a work table 2 and slit punching. The positional relationship of the band saw saw plate 3 during operation is shown. When the object is a band saw, the saw plate 3 is formed in an endless loop shape.

  FIG. 2 is an exploded perspective view showing the configuration of the press apparatus 1. The apparatus main body has a pair of left and right inverted T-shaped bearings 6 mounted on a press base 4 made of a rectangular plate in the front-rear direction. 6, a press lever 7 whose front end is cranked downward and re-cranked in the horizontal direction is pivotally supported by a fulcrum shaft 8 in a second crank portion so as to be swingable up and down. A pair of left and right pressing rollers 11 made of bearings are rotatably supported by a roller shaft 9 at the front end of the press lever 7 close to the base 4.

  On the base 4 below the rear end side of the press lever 7, an actuator 13 comprising a small air cylinder having a rod end 12 for receiving the press lever 7 is mounted and installed. By extending, the rear end side of the press lever 7 swings upward with the fulcrum shaft 8 as a fulcrum, and the front end side rotates downward.

On the other hand, a die unit 14 unitized in a rectangular parallelepiped block is detachably mounted on the press base 4 below the front end side of the press lever 7, and a roller is used when the front end of the press lever 7 is lowered. 11, the mold unit 14 is pressed, and a punch 29 described later is stroked. At this time, the punching pressure of the punch 29 is about 300 kg / cm ² and the stroke S is about 3 mm.

  The mold unit 14 is configured by combining a lower die plate 16, a middle punch plate 17, and a pressing plate 18 that is mounted on the punch plate 17 in a rectangular parallelepiped shape (block shape). Among them, a die (female die) 19 is fitted in the attachment hole 21 and attached upward in the center of the front end side of the die plate 16, and circular attachment seats 22 are formed at four corner portions to form a stroke. A guide (pin) 23 is mounted upward.

  Further, coil springs 26 are respectively arranged in the vertical direction on the spring seats 24 provided at the intermediate positions in the front-rear direction of the left and right stroke guides 23. Further, a bolt insertion part 27 formed in a U-shaped slit shape is provided at the left and right positions of the rear end of the die plate 16, and a mounting bolt 28 is inserted therethrough so that the die plate 16 is mounted on the base 4. The entire mold unit 14 is attached and fixed on the base 4.

  In this embodiment, the bolt insertion portion 27 is aligned with the two bolts 28 screwed in advance on the base 4, the mold unit 14 is slid rearward, and the die plate 16 is fastened with the bolts 28. The die unit 14 is attached only by removing the bolt 28 and removing it forward.

  At the center of the front end of the punch plate 17, a punch 29 is clamped and fixed by a mounting block 31. The mounting block 31 is fitted in the center of the front end of the punch plate 17, and the punch 29 has a circular shape therebetween. The punch 29 is fitted into the mounting hole 32 and is detachably mounted by fastening the mounting block 31 with a bolt 33.

  In addition, guide holes 34 are formed in the four corners of the punch plate 17 so as to guide and insert the stroke guides 23 with respect to the die plate 16 to guide the elevation (stroke) of the punch plate 17 with respect to the die plate 16. A spring hole 36 through which the spring 26 is inserted is formed at the intermediate position.

  Guide holes 37 are formed at the four corners of the pressing plate 18 so that the upper end of the stroke guide 23 faces, and a bolt 38 is inserted into the center of the pressing plate 18 to keep the pressing plate 18 at a predetermined distance from the die plate 16. A bolt insertion hole 39 for elastically holding the spring through the spring 26 is formed, and a screw hole 35 for the bolt 38 is provided at the center of the die plate 16.

  The bolt 38 determines the elastic lift (stroke S) of the punch plate 17 by keeping the distance (height) of the pressing plate 18 to the die plate 16 constant. Reference numeral 40 denotes a bolt hole on the punch plate side through which the bolt 38 is inserted.

  Before and after the bolt hole 39 of the pressing plate 18, a bolt hole 42 for inserting a bolt 41 for fastening and fixing the pressing plate 18 to the upper surface of the punch plate 17 is formed. 41 screw holes 43 are provided. When the pressing plate 18 is attached and fixed to the punch plate 17, the pressing plate 18 is pressed by the roller 11 at the tip of the press lever 7, and both of them move up and down (stroke) integrally with the die plate 16, A chip mounting slit 10 b of the saw plate 3 is punched and formed by a die 19 and a punch 29. The saw plate 3 is inserted into the stroke space (S) between the die plate 16 and the punch plate 17, and the slits are sequentially punched while being manually fed in the direction of arrow a as shown in FIGS. .

  In this embodiment, the pressing plate 18 is integrally attached and fixed on the punch plate 17 with bolts 41. However, as the die unit 14, it is sufficient if the punch plate 17 moves up and down with respect to the die plate 16. It is also possible to integrally form the plate 17 and the pressing plate 18 as a punch plate. In this case, it is necessary to project the punch 29 on the lower surface side of the integrally formed punch plate to receive the upper end of the spring 26.

Next, the positioning mechanism of the saw plate 3 with respect to the press device 1 during the slit punching operation will be described.
As shown in FIG. 2 and FIG. 6, angle-shaped mounting brackets 44 facing inwardly from the left and right outsides are fastened on the front mounting ends of the left and right bearings 6 mounted on the base 4 so as to be detachable from the outside. A presser plate 46 formed in an angled shape in a plan view is inserted into the lower part of the mounting and fixing portion projecting from both front and rear ends of the mounting plate, and is fixed by a set bolt (not shown). ing. The presser plate (presser) 46 holds the tooth tip end of the saw blade 3 and restricts vertical movement during the punching operation. Further, the inner end of a belt-like positioning plate 47 that is vertically oriented in the left-right direction is attached and fixed to the front end surfaces of the left and right mounting brackets 44 by screws or the like, and the teeth of the saw plate 3 are attached to the positioning plate 47 during punching work. The front side (upper blade surface) abuts, and positioning of the saw blade 3 in the front-rear direction is performed.

  Further, a positioning pin 48 is erected upward on the upper surface of the die 19 described above. The positioning pin 48 is formed in a sawtooth shape on the saw plate 3 before slit formation as shown in FIGS. Positioning the saw blade 3 in the left-right direction, that is, the slit punching position for each tooth of the original tooth 15 is determined by contacting and locking the lower blade side recess of the tooth 15.

  Next, the chip and the chip mounting structure of the saw plate 3 will be described. Before forming the mounting groove (slit) 10b for inserting the chip 5 into the saw plate 3, as shown by the phantom lines in FIGS. A base tooth 15 having a shape similar to a saw blade of a normal band saw is formed in advance, and this base tooth 15 is composed of a tooth bottom portion 15a and a tooth tip portion 15b which are serrated irregularities.

  On the other hand, when the slit 10b is formed by punching, if the portion to be actually punched is the punched portion 10, the slit 10b enters from the tooth tip portion 15b toward the oblique angle of attack at the center in the width direction of the saw plate 3. In addition to the narrow and substantially parallel slit 10b, a pre-extracted portion 10a including a sharp tip at the open end side of the slit 10b and the chevron of the tooth tip portion 15b is punched (cut) together with the slit 10b. .

  To the slit 10b thus completed, a chip 5 that is grooved in an H-shaped cross section in the left-right direction (transverse section) is pressed, inserted, fitted, and attached to the slit 10b thus completed. In this case, the slit width of the slit 10b is punched to about 0.9 mm or 1.4 mm as described above according to the size of the chip 5.

  In addition, the shape after punching out the preliminary extraction portion 10a and the slit 10b corresponds to the cross-sectional shape of the uncut portion of the insertion groove (see the chain line portion in FIG. 8) formed on the front and rear surfaces of the chip 5. When the chip 5 is inserted and fitted, the chips 5 are adapted to each other to stabilize the insertion and fixation of the chip 5.

  The detailed structure of the punch 29 and the die 19 forming the slit 10b as described above will be described below with reference to FIGS. FIG. 4B is a perspective view showing the overall structure of the die 19 of this embodiment. In this example, the die 19 is formed in a rectangular parallelepiped shape in plan view, and the lower portion protrudes in a flange shape, with a punch 29 at the center. A punching hole 52 of the same shape through which the punching blade 51 is inserted is provided.

  On the other hand, as shown in FIGS. 4 (A) and 5 (A) to 5 (C), the punch 29 is punched at the center of the tip (lower end) of the cylindrical main body portion whose upper end is formed in a stepped shape having a large diameter. The extraction blade 51 is protruded. The punching blade 51 is always inserted through the punching hole 52 of the die 19, guides the stroke of the punch 29 with respect to the die 19, and extends to the forefront and protrudes, and the proximal end portion of the punch guide portion 51a A tooth tip side punching blade 51b which is formed in a step shape on the side and has the same wide cross section as the punch guide portion 51a and punches the preliminary punching portion 10a of the saw plate 3 described above, and a tooth from the tooth tip side punching tooth 51b. A narrow slit punching blade 51c that protrudes toward the original side and punches the slit 10b portion is provided.

  And the lower end surface (punching surface) of the tooth tip side punching blade 51b and the slit punching blade 51c is inclined in a single plane in a direction that sequentially rises toward the slit punching blade 51c in bottom view, At the time of slit punching and cutting, cutting is started from the preliminary punching portion 10a on the tooth tip side, punching is sequentially performed toward the slit 10b, and finally the deepest portion of the slit 10b is punched. The inclined surface from the tooth tip side punching blade 51b to the slit punching blade 51c is preferably a single plane, but it may be an end surface that changes while being bent or bent in the upward direction.

  Due to the formation of the inclined surface, the punching surface shifts from the wide portion to the narrow portion sequentially, so that it is possible to prevent a sudden overload from being applied to the narrow slit punching blade 51c and to prevent the portion from being damaged. . 53 is a stopper portion projecting inwardly in the vicinity of the punching blade 51. After the slit punching blade 51c punches the slit 10b, the upper surface of the die 19 is brought into contact to regulate the lower limit position of the stroke. It is a stopper part.

The press apparatus shown in the above embodiment has a compact size with a press base size of 120 × 260 (mm) and an overall height of about 165.12 mm, and a weight of about 13 kg with the die unit 14 incorporated. The overall size is extremely small and light. For this reason, the work table to which it is attached is also small and does not require high strength, and work in a small space is possible.

  In addition, because it is small and lightweight, it can be easily carried and transported to a distance. For example, it can easily clear 21kg of the handling weight limit of small international luggage, so it can be easily transported to foreign countries, and the punching type is also small. Since it is unitized, it has the advantage that it can be easily transported and procured as a unit when the mold is exhausted regardless of whether it is in Japan or overseas, and the mold replacement work is also simple as described above.

  In addition, the die unit is not necessarily used when incorporated in the press device of the above embodiment. For example, together with the conventional saw-tooth forming press die, it is arranged in parallel with the general punching press on the downstream side in the feed direction on the same line. It is also possible to perform simultaneous processing on a processing line of one cycle simultaneously with the punching formation of the original teeth. It should be noted that the method and apparatus shown in the above embodiments can be applied to saw blades other than band saws.

  Then, in order to punch and form the slit 10b in the tooth tip portion 15b of the saw blade 3 with the press device 1 configured as in the above embodiment, as shown in FIG. 1 and FIG. The height is determined by the mounting table 2a of the saw plate 3 with respect to the pressing device 1, and the tooth tip portions are positioned while performing front / rear, left / right, up / down positioning of the saw plate 3 on which the original teeth 15 are previously formed as described above. The slits 10b may be sequentially punched while being fed in the direction of arrow a every 15b.

DESCRIPTION OF SYMBOLS 1 Press apparatus 3 Saw board 4 Press base 5 Tip 6 Bearing 7 Press lever 8 Support shaft 9 Roller shaft 10 Punching part 10a Preliminary extraction part 10b Slit 11 Roller 12 Rod end 13 Actuator (air cylinder)
14 type unit 15 original tooth 15a tooth bottom 15b tooth tip 16 die plate 17 punch plate 18 pressing plate 19 die (female)
23 Stroke guide 26 Spring 27 Bolt insertion part 28 Mounting bolt 29 Punch 44 Mounting bracket 46 Presser plate (presser)
47 Positioning plate 48 Positioning pin 51 Punching blade 51a Punch guide part 51b Cutting edge side cutting blade 51c Slit punching blade 52 Punching blade

Claims (11)

  After forming an original tooth (15) made of irregularities of the tooth tip portion (15b) and the tooth bottom portion (15a) at one end in the width direction of the saw plate (3), a sawtooth tip (15b) is formed on the tooth tip portion (15b) side. 5) A method of forming a sawtooth tip mounting slit by punching and forming a slit (10b) for inserting and fixing.   The punching portion (10) when punching and forming the slit (10b) is made wider toward the center of the saw blade (3) in the width direction from the wide preliminary punching portion (10a) on the tooth tip side and the preliminary punching portion (10a). 2. The narrow slit (10b) that continuously enters, punching and cutting is started from the preliminary punching portion (10a) at the time of punching, and then the slit (10b) is continuously punched and cut. A method of forming a slit for mounting a sawtooth tip.   A punching device (1) having a punch (29) for punching and a die (19), and a punching blade (51) for a punch (29) inserted into a punching hole (52) on the die (19) side The outer shape is wider than the preliminary punching blade (51b) for punching the preliminary cutting portion (10a) on the tooth tip side of the saw plate (3), and the tooth from the preliminary punching blade (51b) on the tooth tip side in plan view. A saw blade for use in the method according to claim 1 or 2, comprising a slit punching blade (51c) that projects toward the main side and punches a narrow slit (10b) for inserting and fixing the sawtooth tip (5). Press device for forming chip mounting slits.   The above punching is performed so that the punching end surfaces of the preliminary punching blade (51b) and the slit punching blade (51c) are formed into a continuous surface and punching and cutting is started from the preliminary punching blade (51b) at the time of punching formation. The press device for forming a sawtooth tip mounting slit according to claim 3, wherein the end surface is inclined in a direction rising from the preliminary punching blade (51b) toward the slit punching blade (51c).   In plan view, it is a cross-section that is continuous with the cross-section outside the tooth tip of the preliminary punching blade (51b) and protrudes downward from the punching end surface of the preliminary punching blade (51b). The press device for forming a sawtooth tip mounting slit according to claim 3 or 4, wherein a punch guide portion (51a) is provided which is always inserted into the punched hole (52) and guides the positioning of the punch (29) with respect to the die (19). .   A punch plate (17) and a die plate (16) for supporting the punch (29) and the die (19) at fixed positions are provided, and a stroke guide (23) is provided between the punch plate (17) and the die plate (16). ) And the spring (26), and the punch plate (17) and the die plate (16) are combined to form a single die unit (14) so that the stroke can be made elastically within a predetermined stroke (S) range. 6. The press device for forming a sawtooth chip mounting slit according to claim 3, wherein the die plate (16) is detachably mounted on the press base (4).   A pressing device (1) having a positioning mechanism for positioning a saw plate (3) in a three-dimensional direction with respect to a punch (29) and a die (19) during punching of a slit (10b), 1) A positioning pin (48) for standing and locking the base tooth (15) formed on the saw blade (3) inserted horizontally in 1) is provided. A press device for forming the sawtooth tip mounting slit according to any one of claims 6 to 6.   The press device for forming a sawtooth tip mounting slit according to claim 6 or 7, wherein the positioning pin (48) is detachably inserted on the die (19) or the die plate (16).   A presser (46) is provided which presses the saw plate (3) during the punching operation of the slit (10b) to restrict its vertical movement and stably punches and pulls out the punch (29). , 5, 6, 7 or 8. The press device for forming the sawtooth tip mounting slit.   A press lever (7) whose front and rear ends are moved up and down in a reverse direction is pivotally supported on a press base (4) by a fulcrum shaft (8), and punched below a proximity position on the front end side of the press lever (7). (29) The actuator is arranged so that the side can be pressed, and the rear end of the press lever (7) is driven to push up and the punch (29) is driven at the front end of the press lever (7) below the rear end. The press device for forming a sawtooth chip mounting slit according to any one of claims 3, 4, 5, 6, 7, 8 or 9, wherein (13) is installed.   11. The roller according to claim 10, wherein a roller (11) is pivotally supported on the front end side of the press lever (7) so as to be pressed against the punch plate (17) when the press lever is driven and to drive the punch plate (17) downward. Press device for forming saw blade insert slit.

Images