JP2019072837A - Cutting device - Google Patents

Abstract

To provide a cutting device for a cut material such as a bar steel, a wire or the like in which the cut material can be born with a sufficient clamping force against a movable blade at the time of shearing.SOLUTION: A movable blade 4 is fixed to a cylindrical holding hole 42, which is formed in a movable blade holding member 41, by bolts 43, 43. A pressing member 5 is fitted to the movable blade holding member 41 on a lower side of the movable blade 4. On the movable holding member 41, a clamp block 53 is so supported on a lower side of the pressing member 5 as to be movable in a longitudinal direction in Fig. 1. A pressing pin 55 is so supported on a right side face side of the clamp block 53 as to be movable in a longitudinal direction in Fig. 1. A cylinder (pressing drive source) 56 is fitted to a side face of a machine body 2 at a position opposite to the pressing pin 55 in Fig. 1, and a piston 57 is so fitted as to be slidable in a longitudinal direction in Fig. 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for cutting a material to be cut such as a steel bar or a wire rod. More specifically, the present invention relates to, for example, a cutting device for shearing a steel bar, a wire rod or the like to a fixed size as a billet for forging.

  In order to manufacture a forged product or the like which is a metal part, it is first necessary to cut and take out a required length called a billet from a material to be cut such as a steel bar which is a material thereof with a cutting device. In the case of a forged product, this billet is heated in a heating furnace or put into a press mold at normal temperature without heating, and plastically worked into a desired shape. In general, the billet is manufactured into a final part through a machining process and the like after the forging process. A cutting device for cutting a material to be cut such as a steel bar by shearing is widely used because it can cut at a high speed and does not generate chips. In this cutting device, a fixed blade and a movable blade having a circular or semicircular shape or the like are used according to the shape of the material to be cut. At the time of this cutting, there is a gap between the workpiece and the fixed blade and the movable blade. The reason for this is that when a material to be cut with a deviation in external dimensions is fed in the axial direction during shearing, there is no gap between the material to be cut and the fixed blade or movable blade, a fixed blade, a movable blade And the material to be cut interfere with each other.

  On the other hand, in order to increase the shearing accuracy such as securing the flatness of the shearing surface, it is possible that the material to be cut and the fixed blade and the movable blade are sheared in a firmly clamped state without a gap between them. preferable. In order to eliminate the gap between the material to be cut and the movable blade, it has been proposed that the material to be cut be supported from below and clamped and the material to be cut be clamped to the movable blade by reverse pressing with an inclined surface. Patent Document 1). In the mechanism described in Patent Document 1, at the time of shearing, a material to be cut is pressed from below onto the movable blade by a fluid pressure cylinder, and the material to be cut is supported and fixed to the movable blade. However, the clamping force by the fluid pressure cylinder is in the direction of reducing the shearing force in order to clamp by the reaction force from the fixed part of the airframe etc., and the clamping force of a sufficient material can not be secured at the shearing.

  Thus, at the time of shearing, the clamping force of the workpiece to the movable blade on the movable blade side is not sufficient. In the fixed blade, in order to clamp the material to be cut from above at the time of shearing, a movable block having an inclined surface is proposed to clamp the material to be cut to the fixed blade (Patent Document 2). On the other hand, at the time of non-shearing, it is necessary to smoothly move the material to be cut at a high speed in order to increase the cutting speed, so an appropriate gap is required between the material to be cut and the fixed blade and the movable blade. That is, contradictory tasks are required at the time of shearing and non-shearing of the material to be cut.

JP-A-6-79519 JP 2015-85407

  The present invention was invented in the background as described above, and achieves the following object. An object of the present invention is to provide a cutting device capable of gripping a material to be cut with a sufficient clamping force against a movable blade at the time of shearing in a device for cutting a material to be cut such as a steel bar or a wire rod. .

The present invention takes the following means in order to solve the problems.
That is, according to the cutting device of the first aspect of the present invention, there is provided a fixed blade attached to a machine body for supporting the material to be cut, and a movable blade holding member mounted movably with respect to the fixed blade on the machine body. A movable blade attached to the movable blade holding member and shearing the material to be cut by a shearing force acting between the movable blade and the fixed blade; and a movable blade attached to the movable blade holding member and moving the movable blade holding member Provided so as to be movable in a direction parallel to the direction, and when shearing the material to be cut, a pressing surface for pressing the opposite side of the material to be cut opposite to the movable blade side to sandwich the material with the movable blade A pressing member, a pressing member-side inclined surface formed on the back surface of the pressing surface on the pressing member, and a clamp block attached to the movable blade holding member and formed at the same inclination angle as the pressing member-side inclined surface With side slope A clamp block movably provided in a direction perpendicular to the moving direction of the movable blade holding member; and when the material to be cut is sheared, the clamp block is moved in a direction orthogonal to the moving direction of the movable blade holding member And a pressing drive source for pressing the material to be cut with the pressing surface of the pressing member by pressing the pressing member-side inclined surface with the clamp block side sloping surface.

In the cutting device according to the second aspect of the present invention, in the first aspect, the pressing drive source is attached to the machine body, and when shearing the material to be cut, presses the one end of the clamp block to move the clamp block to the movable blade It is characterized in that it is moved in the direction orthogonal to the moving direction of the holding member.
The cutting device according to the third aspect of the present invention is the cutting member according to the second aspect of the present invention, wherein the return lever is pivotally attached to the movable blade holding member and has one end engaged with the clamp block and the body. When the movable blade holding member moves to a position where the shearing is completed, it engages with the other end of the return lever to swing the return lever, and the clamp block side inclined surface separates from the pressing member side inclined surface And a return pin for moving the clamp block in a direction.

In the cutting device according to the fourth aspect of the present invention, in the third aspect, the return pin is movably attached to the machine body in a direction parallel to the moving direction of the movable blade holding member, and the first spring member It is characterized by being energized.
In the cutting device according to the fifth aspect of the present invention, in the first aspect, the pressing drive source is attached to the movable blade holding member and presses one end of the clamp block when shearing the workpiece. The movable blade holding member may be moved in a direction orthogonal to the moving direction of the movable blade holding member.
In the cutting device according to the sixth aspect of the present invention, in the second aspect or the fifth aspect, the pressing member is biased in the reverse pressing direction by a second spring member provided between the pressing member and the movable blade. It is characterized by being.

  In the cutting device according to the present invention, since the pressing member for clamping the material to be cut is attached to the movable blade to the movable blade holding member, the clamping force is not reduced when shearing the material to be cut. Material bounce is eliminated, shear accuracy is improved, and a stable billet can be manufactured.

FIG. 1 is a longitudinal sectional front view showing a cutting device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line A-A of FIG. FIG. 3 is a cross-sectional view taken along line B-B of FIG. FIG. 4 is a view corresponding to FIG. 1 showing a state immediately after the start of shearing. FIG. 5 is a view corresponding to FIG. 1 showing a state immediately before the movable blade holding member reaches the lowering end. FIG. 6 is a view corresponding to FIG. 1 showing a state in which the movable blade holding member has reached the lowering end. FIG. 7 is a longitudinal sectional front view showing a cutting device according to a second embodiment of the present invention. FIG. 8 is a longitudinal sectional front view showing a state in which the rod is clamped by operating the pressing drive source attached to the movable blade holding member in the cutting apparatus of the second embodiment of FIG. 7;

First Embodiment of Cutting Device
Hereinafter, a first embodiment of the present invention will be described based on the drawings. 1 is a longitudinal sectional front view showing a cutting apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line A-A of FIG. 1, and FIG. 3 is a sectional view taken along the line B-B of FIG. As shown in FIGS. 1 to 3, the cutting device 1 according to the first embodiment of the present invention is a long rod (a material to be cut) which is fed from the rod feeding device (not shown) to the stopper 12 side. ) 13 is sheared by the relative movement between the fixed blade 3 and the movable blade 4 to produce a billet. The machine body 2 is fixed to the base 11 of the cutting device 1 with a bolt (not shown), and the fixed blade 3 and the movable blade 4 are incorporated in the machine body 2.

  As shown in FIGS. 2 and 3, the fixed blade 3 is fixed by a bolt 31 in a holding hole 26 on the right end surface (upper view) of the hollow cylindrical holding cylinder 21 fixed to the axial center of the machine body 2. It is fixed. The fixed blade 3 is formed in a semicircular shape, and a semicircular blade portion 32 is formed on the upper surface thereof. As shown in FIG. 2, a hollow cylindrical guide bush 25 is fixed to the axial center portion of the holding cylinder 21, and guided by the guide bush 25, the rod 13 is smoothly fed to the stopper 12 side. A movable blade holding member 41 is attached to the machine body 2 so as to be movable in the vertical direction in FIGS. 1 and 2. A vertical guide groove 22 is formed in the machine body 2, and a rectangular plate-like movable blade holding member 41 is attached to the guide groove 22 so as to be movable in the vertical direction. The movable blade holding member 41 is driven by a vertical drive mechanism (not shown) such as a crank, an oil pressure, a lever mechanism or the like which is a known technique.

  The movable blade 4 is fixed to the cylindrical holding hole 42 formed in the movable blade holding member 41 by bolts 43, 43. As shown in FIG. 1, the movable blade 4 is formed in a semicircular shape, and a semicircular blade portion 44 is formed on the lower surface thereof. At the upper end of the movable blade holding member 41, a rectangular plate-like connecting plate 45 extending horizontally in the left-right direction of FIG. 1 is integrally formed, and guide rods 46, 46 are attached to the left and right ends of the connecting plate 45. . The cylindrical guide rods 46, 46 are disposed parallel to the guide groove 22 of FIG. 1, and the guide rods 46, 46 can slide vertically in the guide bushes 47, 47 fixed to the side surface of the airframe 2 It fits and guides the movable blade holding member 41. The movable blade 4 fixed to the movable blade holding member 41 is moved in the vertical direction in FIGS. 1 and 2, and a bar is generated by a shearing force between the blade portion 32 of the fixed blade 3 and the blade portion 44 of the movable blade 4. The material 13 is sheared to form a billet.

[Movable blade side clamping mechanism]
On the other hand, the pressing member 5 is attached to the movable blade holding member 41 below the movable blade 4. A rectangular guide groove 48 is formed in the lower portion of the holding hole 42 in the movable blade holding member 41, and the rectangular guide groove 48 is moved in the vertical direction of FIG. 1 (a direction parallel to the moving direction of the movable blade holding member 41). The pressing member 5 is fitted as much as possible. On the upper portion of the pressing member 5, a pressing shoe 51 for supporting the rod 13 (and the billet sheared) is fixedly attached. The pressing surface of the pressing shoe 51 has a semicircular cross section so as to conform to the outer shape of the bar 13. The pressing member 5 supports the rod 13 (and the sheared billet) until the end of the shearing of the rod 13 when the movable blade 4 is lowered. On the lower surface (rear surface) of the pressing member 5, a pressing member side inclined surface 52 rising to the right in FIG. 1 is formed. The inclination angle of the pressing member side inclined surface 52 is formed at 6 degrees in this example.

  A clamp block 53 is movably supported by the movable blade holding member 41 below the pressing member 5 in the left-right direction in FIG. 1 (a direction orthogonal to the moving direction of the movable blade holding member 41). On the upper surface of the clamp block 53, a clamp block side inclined surface 54 rising to the right in FIG. 1 is formed. The inclination angle of the clamp block side inclined surface 54 is formed to be 6 degrees, which is the same as that of the pressing member side inclined surface 52. In short, the pressing member 5 and the clamp block 53 constitute a wedge mechanism. A pressing pin 55 is supported by the movable blade holding member 41 so as to be movable in the left-right direction in FIG.

  A cylinder (pressing drive source) 56 is attached to the right side (upper side in the drawing) of the machine body 2 at a position facing the pressing pin 55 in FIG. 1, and the piston 57 is slidably fitted in the left and right direction of FIG. doing. A third spring member 58 is inserted between the left side surface of the clamp block 53 (the upper view) and the guide groove 48, and the clamp block 53 and the pressing pin 55 are always attached in the right direction (anti-pressing direction) of FIG. I'm upset. The second spring members 59, 59 are inserted between the upper surface of the pressing member 5 and the lower surface of the movable blade 4 to always bias the pressing member 5 downward (in the counter-pressing direction). In the state before the start of shearing in FIG. 1 (the movable blade holding member 41 is at the upper end position), the piston 57, the clamp block 53 and the pressing pin 55 are at the right end position in FIG. It is moved in the direction away from it (anti-pressing direction). Therefore, when the bar 13 passes through the blade portion 44 of the movable blade 4, gaps are formed on the upper side and the lower side of the bar 13.

  The return lever 6 is pivotably attached to the movable blade holding member 41 below the clamp block 53. The return lever 6 is pivotally mounted within a plane parallel to the paper surface of FIG. 1 with the pivot pin 61 as a fulcrum. The upper end (one end) of the return lever 6 is engaged with the clamp block 53. As shown in FIGS. 1 and 2, a return pin 62 is attached to the base 11 below the return lever 6 so as to be movable in the vertical direction in FIGS. 1 and 2. The return pin 62 is always urged upward (in the pressing direction) by the first spring member 63.

  When the movable blade holding member 41 is lowered and the shearing of the rod 13 is completed, the lower end (other end) of the return lever 6 abuts on the upper end of the return pin 62. Then, the return lever 6 pivots clockwise in FIG. 1 and the clamp block 53 moves rightward in FIG. 1 so that the clamp block side inclined surface 54 moves away from the pressing member side inclined surface 52. , And the pressing member 5 separates from the bar 13.

[Fixed blade side clamp mechanism]
As shown in FIGS. 2 and 3, a semicircular fixed blade side pressing member 7 is attached to the upper part of the fixed blade 3. A semicircular pressing portion 71 is formed on the lower surface of the fixed blade side pressing member 7, and the pressing portion 71 presses the outer peripheral portion of the bar 13 from the upper side, and the fixed blade 3 and the pressing portion 71 In cooperation, the bar 13 is clamped and pressed while being restrained in the vertical and lateral directions. The fixed blade side pressing member 7 is provided with fourth spring members 72, 72 between it and the upper surface of the fixed blade 3. The fourth spring members 72, 72 always push the fixed blade side pressing member 7 upward by the biasing force of the fourth spring members 72, 72, and the direction of separating the fixed blade side pressing member 7 from the bar 13 It is always biased in the (anti-pressing direction). Therefore, when the bar 13 passes over the blade portion 32 of the fixed blade 3, a gap is formed around the bar 13.

  On the upper surface of the fixed blade side pressing member 7, a pressing member side inclined surface 73 rising to the right in FIG. 3 is formed. The inclination angle of the pressing member side inclined surface 73 is formed at 6 degrees. A clamp lock 74 is attached to the upper side of the fixed blade side pressing member 7 so as to be movable in the left and right direction in FIG. On the lower surface of the clamp lock 74, a clamp block side inclined surface 75 rising to the right in FIG. 3 is formed. The inclination angle of the clamp block side inclined surface 75 is formed to be the same as the inclination angle of the pressing member side inclined surface 73. A cylinder 76 is attached to the right side of the clamp lock 74 in the machine body 2, and the left end of the piston rod 77 of the cylinder 76 is screwed and fixed to the female screw at the right end of the clamp block 74. Therefore, when the cylinder 76 is actuated, the clamp block 74 moves in the left and right direction in FIG.

  When the solenoid valve (not shown) is switched to the reverse (pressing) side and the cylinder 76 is operated in the reverse direction (right direction in FIG. 3), the clamp block 74 moves in the right direction in FIG. The pressing member-side inclined surface 73 of the fixed blade-side pressing member 7 is pushed down by the clamp block-side inclined surface 75 of the clamp block 74 and the bar 13 is pressed and clamped by the pressing portion 71 of the fixed blade-side pressing member 7. The inclination angle of the clamp block side inclined surface 75 and the pressing member side inclined surface 73 is set to 6 degrees. The inclination angle is smaller than the friction angle between the pressing member side inclined surface 73 and the clamp block side inclined surface 75. Therefore, even if a large reaction force acts on the fixed blade side pressing member 7 when the rod 13 is sheared, the clamp block 74 and the piston rod 77 do not return in the left direction (unclamping direction) due to the force boosting effect of their ridges. . Accordingly, the bouncing of the rod 13 at the time of shearing is eliminated, the shearing accuracy is improved, and a stable billet can be manufactured.

[Billet discharge mechanism]
As shown in FIG. 2, in the through hole 23 formed in the holding cylinder 21 and the through hole 33 formed in the fixed blade 3, a rod for kicking the billet which has been completely sheared toward a recovery chute (not shown) A kicking pin 24 is provided so as to be able to move back and forth (move in the left and right direction in FIG. 2). The kicking pin 24 advances and retracts in conjunction with the shearing operation by the movable blade 4 and performs an operation of kicking the billet on which the shearing has been completed toward the recovery chute (not shown). Before starting the shearing operation of the rod 13, according to the diameter of the rod 13 to be sheared, the fixed blade 3, the fixed blade side pressing member 7, the guide bush 25, the movable blade 4, the pressing member 5, the pressing shoe 51 We exchange by set at the same time.

[Shearing Operation of Cutting Device 1]
Next, the shearing operation of the cutting device 1 of the first embodiment of the present invention will be described. First, the rod feeding device (not shown) is operated to feed the long rod 13 in the right direction in FIG. 2, and the tip of the rod 13 (the right end of the rod 13 in FIG. 2) , The bar 13 is fed by a predetermined length. Next, move the piston 77 of the cylinder 76 to the right in FIG. 3 and push down the pressing member side inclined surface 73 of the fixed blade side pressing member 7 with the clamp block side inclined surface 75 of the clamp block 74 The rod 13 is pressed and clamped by the pressing portion 71 of FIG. Next, hydraulic pressure is supplied to the cylinder 56 of FIG. 1 to move the piston 57 leftward, and the clamp block 53 is moved leftward by the pressing pin 55 to press the blade portion 44 of the movable blade 4 and the pressing member 5 The bar 13 is pressed and clamped by the pressing surface of the screw 51. Next, the movable blade 4 fixed to the movable blade holding member 41 is moved downward in FIG. 1 by operating the vertical drive mechanism such as a known crank mechanism, hydraulic cylinder, lever mechanism or the like (not shown). Initiate 13 shears. FIG. 4 is a view corresponding to FIG. 1 showing a state immediately after the start of shearing.

  If the movable blade holding member 41 is further moved downward, shearing of the rod 13 by the movable blade 4 and the fixed blade 3 is continued. FIG. 5 is a view corresponding to FIG. 1 showing a state immediately before the movable blade holding member 41 reaches the lowering end. As shown in FIG. 5, when the movable blade holding member 41 moves downward, the right end surface of the pressing pin 55 separates from the left end surface of the piston 57. However, the inclination angles of the pressing member side inclined surface 52 and the clamp block side inclined surface 54 are formed at 6 degrees. Since this inclination angle is smaller than the friction angle between the pressing member side inclined surface 52 and the clamp block side inclined surface 54, a large reaction force acts on the pressing member 5 when the bar 13 is sheared. However, the clamp block 53 and the pressing pin 55 do not return in the right direction (unclamping direction) due to the force increasing effect of the wedge.

  In the state of FIG. 5, the shearing of the bar 13 is completed, and the billet 14 is cut out. In the cutting device 1 according to the first embodiment of the present invention, the pressing member 5 for clamping the rod 13 to the movable blade 4 and the clamp block 53 are attached to the movable blade holding member 41. Accordingly, since the clamping force is not reduced at the time of shearing of the bar 13, the bouncing of the bar 13 at the time of shearing by the movable blade 4 is eliminated, the shearing accuracy is improved, and a stable billet can be manufactured. FIG. 6 is a view corresponding to FIG. 1 showing a state in which the movable blade holding member 41 is further moved downward and the movable blade holding member 41 has reached the lowered end. When the movable blade holding member 41 reaches the lowering end, the lower end (other end) of the return lever 6 abuts on the upper end of the return pin 62 as shown in FIG. Then, the return lever 6 pivots clockwise in FIG. 6, and the clamp block 53 and the pressing pin 55 move rightward in FIG. 1 so that the pressing surface of the pressing screw 51 of the pressing member 5 separates from the billet 14. Therefore, the clamp of the billet 14 is released.

  Next, the kicking pin 24 shown in FIG. 2 moves in the right direction of FIG. 2 and kicks the billet 14 which has been completely sheared to the not-shown recovery chute side. Next, as shown in FIG. 6, the cylinder 56 is operated to move the piston 57 to the rightward moving end. Also, the cylinder 76 is operated in the left direction of FIG. 3 and the clamp block 74 is moved in the left direction of FIG. 3 via the piston rod 77. The clamp block side inclined surface 75 of the clamp block 74 is separated from the pressing member side inclined surface 73 of the fixed blade side pressing member 7, and the pressing portion 71 of the fixed blade side pressing member 7 is separated from the bar 13. Next, the movable blade holding member 41 moves upward to return to the initial state of FIG. 1, and the shearing operation is completed.

Second Embodiment of Cutting Device
Hereinafter, a second embodiment of the present invention will be described based on the drawings. FIG. 7 is a longitudinal sectional front view showing a cutting apparatus 100 according to a second embodiment of the present invention, and FIG. 8 is a pressure attached to a movable blade holding member in the cutting apparatus 100 according to the second embodiment shown in FIG. It is a longitudinal cross-section front view which shows the state which acted the drive source and clamped the rod. The cutting device 100 according to the second embodiment of the present invention is an example in which a pressing drive source for pressing a bar by a pressing member at the time of bar shearing is attached to a movable blade holding member. In the following description, only parts different from the cutting device 1 of the first embodiment will be described, and the same parts as the cutting device 1 of the first embodiment will be assigned the same reference numerals.

[Movable blade side clamping mechanism]
The cutting device 100 of the second embodiment is a pressing member 8 movable in the vertical direction of FIG. 7 (a direction parallel to the moving direction of the movable blade holding member 41) in the rectangular guide groove 48 of the movable blade holding member 41. Is fitted. On the right half of the lower surface (rear surface) of the pressing member 8, a pressing member-side inclined surface 821 rising to the right in FIG. 7 is formed. Further, on the left half of the lower surface (rear surface) of the pressing member 8, a pressing member side inclined surface 822 rising to the left in FIG. 7 is formed. The inclination angle of the pressing member side inclined surfaces 821 and 822 is formed to be 6 degrees in this example. A clamp block 831 is movably supported by the movable blade holding member 41 on the lower side of the lower half of the lower surface of the pressing member 8 in the left-right direction of FIG. 7 (a direction orthogonal to the moving direction of the movable blade holding member 41) There is.

  On the upper surface of the clamp block 831, a clamp block side inclined surface 841 rising to the right in FIG. 7 is formed. A clamp block 832 is supported movably in the left and right direction in FIG. 7 below the left half of the lower surface of the pressing member 8. On the upper surface of the clamp block 832, a clamp block side inclined surface 842 rising to the left in FIG. 7 is formed. The inclination angles of the clamp block side inclined surfaces 841 and 842 are formed at the same 6 degrees as the pressure member side inclined surfaces 821 and 822. A cylinder (pressing drive source) 861 is formed in the movable blade holding member 41 at a position opposed to the right side surface of the clamp block 831, and a piston 871 is slidably fitted in the lateral direction of FIG. Further, in the movable blade holding member 41, a cylinder (pressing drive source) 862 is formed at a position opposed to the left side surface of the clamp block 832, and the piston 872 is slidably fitted in the lateral direction of FIG. .

  Compressed air is supplied to the cylinders 861 and 862 through the air supply passages 891 and 892 formed in the movable blade holding member 41, and the pistons 871 and 872 operate. Third spring members 88 and 88 are inserted into the spring insertion hole 811 of the clamp block 831 and the spring insertion hole 812 of the clamp block 832, respectively. A pin 85 is sandwiched between the third spring members 88, 88. Therefore, the clamp block 831 is always biased in the right direction (counter pressure direction) of FIG. 7, and the clamp block 832 is always biased in the left direction (counter pressure direction) of FIG. 7 (the movable blade holding member 41 is at the upper end position), the piston 871 and the clamp block 831 are at the right end position in FIG. 7 and the piston 872 and the clamp block 832 are in the left direction in FIG. At the end position, the pressing member 8 is moved in the direction away from the bar 13 (anti-pressing direction).

  Therefore, when the bar 13 passes through the blade portion 44 of the movable blade 4, gaps are formed in the upper and lower portions of the bar 13. In the cutting device 100 of the second embodiment, the return lever 6 and the return pin 62 of the cutting device 1 of the first embodiment are not attached because they are unnecessary.

[Shearing Operation of Cutting Device 100]
Next, the shearing operation of the cutting device 100 of the second embodiment of the present invention will be described. First, the rod feeding device (not shown) is operated to feed the long rod 13 by a predetermined length. Next, the bar 13 is pressed and clamped by the pressing portion 71 of the fixed blade side pressing member 7 of FIG. 3. Next, as shown in FIG. 8, compressed air is supplied to the air supply passages 891 and 892 formed in the movable blade holding member 41 to move the piston 871 leftward and move the piston 872 rightward. . Then, the clamp block 831 moves in the left direction, the clamp block 832 moves in the right direction, and the bar 13 is pressed by the blade portion 44 of the movable blade 4 and the pressing surface of the pressing screw 51 of the pressing member 8 to clamp Do. Next, operate the vertical drive mechanism such as crank, hydraulic pressure and lever mechanism (not shown) to move the movable blade 4 fixed to the movable blade holding member 41 downward in FIG. Start.

  When the movable blade holding member 41 is further moved downward, shearing of the rod 13 by the movable blade 4 and the fixed blade 3 is continued, shearing of the rod 13 is completed, and the billet 14 is cut out. In the cutting apparatus 100 according to the second embodiment of the present invention, the pressing member 8 for clamping the rod 13 to the movable blade 4, the clamp blocks 831 and 832, and the cylinders (pressure driving source) 861 and 862 are movable blade holding members 41. Is attached to Accordingly, since the clamping force is not reduced at the time of shearing of the bar 13, the bouncing of the bar 13 at the time of shearing by the movable blade 4 is eliminated, the shearing accuracy is improved, and a stable billet can be manufactured. Furthermore, since the cylinders (pressing drive sources) 861 and 862 are attached to the movable blade holding member 41, wear between the piston 57 and the pressing pin 55 when the movable blade holding member 41 moves, and the movable blade Since the wear between the return lever 6 and the return pin 62 when the holding member 41 moves is eliminated, the durability is improved. Also, regardless of the movement position of the movable blade holding member 41, it is possible to operate the cylinders (pressing drive sources) 861 and 862 at optimum timing.

  The movable blade holding member 41 is further moved downward, and when the movable blade holding member 41 reaches the lowering end, the compressed air supplied to the air supply passages 891 and 892 is stopped and the air supply passages 891 and 892 are opened to the atmosphere. . Then, the urging force of the third spring members 88, 88 moves the clamp block 831 to the right, the clamp block 832 moves to the left, and the pressing surface of the pressing shoe 51 of the pressing member 8 is from the billet 14 Leave. Therefore, the clamp of the billet 14 is released.

  Next, the kicking pin 24 shown in FIG. 2 moves in the right direction of FIG. 2 and kicks the billet 14 which has been completely sheared to the not-shown recovery chute side. Next, the cylinder 76 is also operated to the left in FIG. 3, and the clamp block 74 is moved to the left in FIG. 3 via the piston rod 77. The clamp block side inclined surface 75 of the clamp block 74 is separated from the pressing member side inclined surface 73 of the fixed blade side pressing member 7, and the pressing portion 71 of the fixed blade side pressing member 7 is separated from the bar 13. Next, the movable blade holding member 41 moves upward to return to the initial state of FIG. 7, and the shearing operation is completed.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment. For example, in the embodiment described above, the clamp mechanism of the rod 13 of the fixed blade 3 is a wedge mechanism, but may be another known clamp mechanism, or the fixed blade 3 is not semicircular but is circular. It may be a blade that does not use a clamp mechanism. The clamp block 53 is forcibly returned by the swinging lever 6, but the clamp block 53 is formed with an inclined surface without arranging the lever 6, and a structure like a return pin 62 in contact with the inclined surface is employed. It may be. Although the pressing pin 55 is driven by the cylinder mechanism by fluid pressure, it may be driven by an electromagnetic force using a coil and a solenoid, or may be a cam mechanism mechanically interlocked with the movable blade holding member 41 . The return pin 62 is attached to the base 11, but may be attached to the airframe 2.

DESCRIPTION OF SYMBOLS 1, 100 ... Cutting device 11 ... Base 12 ... Stopper 13 ... Rod material 14 ... Billet 2 ... Machine body 21 ... Holding cylinder 22 ... Guide groove 23 ... Through hole 24 ... Kicking pin 25 ... Guide bush 26 ... Holding hole 3 ... Fixing Blade 31 ... Bolt 32 ... Blade part 33 ... Through hole 4 ... Movable blade 41 ... Movable blade holding member 42 ... Holding hole 43 ... Bolt 44 ... Blade part 45 ... Coupling plate 46 ... Guide rod 47 ... Guide bush 48 ... Guide groove 5 ... pressing member 51 ... pressing screw 52 ... pressing member side inclined surface 53 ... clamp block 54 ... clamp block side inclined surface 55 ... pressing pin 56 ... cylinder 57 ... piston 58 ... third spring member 59 ... second spring member 6 ... return lever 61 ... pivot pin 62 ... return pin 63 ... first spring member 7 ... fixed blade side pressing member 71 ... pressing portion 72 ... fourth spring member 73 ... pressing member side inclined surface 74 ... Clamp block 75: Clamp block side sloped surface 76: Cylinder 77: Piston rod 8: Pressing member 811, 812: Spring insertion hole 821, 822: Pressing member side sloped surface 831, 832: Clamp block 841, 842: Clamp block side sloped Surface 85: Pin 861, 862: Cylinder 871, 872 ... Piston 88: Third spring member 891, 892: Air supply passage

As shown in FIGS. 2 and 3, the fixed blade 3 is fixed by a bolt 31 in a holding hole 26 on the right end surface (upper view) of the hollow cylindrical holding cylinder 21 fixed to the axial center of the machine body 2. It is fixed. The fixed blade 3 is formed in a semicircular shape, and a semicircular blade portion 32 is formed on the upper surface thereof. As shown in FIG. 2, a hollow cylindrical guide bush 25 is fixed to the axial center portion of the holding cylinder 21, and guided by the guide bush 25, the rod 13 is smoothly fed to the stopper 12 side. A movable blade holding member 41 is attached to the machine body 2 so as to be movable in the vertical direction in FIGS. 1 and 2. A vertical guide groove 22 is formed in the machine body 2, and a rectangular plate-like movable blade holding member 41 is attached to the guide groove 22 so as to be movable in the vertical direction. The movable blade holding member 41 is driven by a vertical drive mechanism (not shown) such as a crank, a hydraulic cylinder , a lever mechanism or the like, which is known in the art.

On the upper surface of the fixed blade side pressing member 7, a pressing member side inclined surface 73 rising to the right in FIG. 3 is formed. The inclination angle of the pressing member side inclined surface 73 is formed at 6 degrees. The machine body 2, the clamping block 74 is mounted to be movable in the left-right direction in FIG. 3 on the upper side of the fixed blade side pressing member 7. The lower surface of the clamp block 74, clamp block-side inclined surface 75 of the upper right in FIG. 3 is formed. The inclination angle of the clamp block side inclined surface 75 is formed to be the same as the inclination angle of the pressing member side inclined surface 73. A cylinder 76 is attached to the right side of the clamp lock 74 in the machine body 2, and the left end of the piston rod 77 of the cylinder 76 is screwed and fixed to the female screw at the right end of the clamp block 74. Therefore, when the cylinder 76 is actuated, the clamp block 74 moves in the left and right direction in FIG.

In the state of FIG. 5, the shearing of the bar 13 is completed, and the billet 14 is cut out. In the cutting device 1 according to the first embodiment of the present invention, the pressing member 5 for clamping the rod 13 to the movable blade 4 and the clamp block 53 are attached to the movable blade holding member 41. Accordingly, since the clamping force is not reduced at the time of shearing of the bar 13, the bouncing of the bar 13 at the time of shearing by the movable blade 4 is eliminated, the shearing accuracy is improved, and a stable billet can be manufactured. FIG. 6 is a view corresponding to FIG. 1 showing a state in which the movable blade holding member 41 is further moved downward and the movable blade holding member 41 has reached the lowered end. When the movable blade holding member 41 reaches the lowering end, the lower end (other end) of the return lever 6 abuts on the upper end of the return pin 62 as shown in FIG. Then, the return lever 6 pivots clockwise in FIG. 6, the clamp block 53 and the pressing pin 55 move rightward in FIG. 6 , and the pressing surface of the pressing screw 51 of the pressing member 5 separates from the billet. Therefore, the clamp of the billet 14 is released.

[Shearing Operation of Cutting Device 100]
Next, the shearing operation of the cutting device 100 of the second embodiment of the present invention will be described. First, the rod feeding device (not shown) is operated to feed the long rod 13 by a predetermined length. Next, the bar 13 is pressed and clamped by the pressing portion 71 of the fixed blade side pressing member 7 of FIG. 3. Next, as shown in FIG. 8, compressed air is supplied to the air supply passages 891 and 892 formed in the movable blade holding member 41 to move the piston 871 leftward and move the piston 872 rightward. . Then, the clamp block 831 moves in the left direction, the clamp block 832 moves in the right direction, and the bar 13 is pressed by the blade portion 44 of the movable blade 4 and the pressing surface of the pressing screw 51 of the pressing member 8 to clamp Do. Next, the upper and lower driving mechanisms such as a crank, a hydraulic cylinder , and a lever mechanism (not shown) are operated to move the movable blade 4 fixed to the movable blade holding member 41 downward in FIG. To start.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment. For example, in the embodiment described above, the clamp mechanism of the rod 13 of the fixed blade 3 is a wedge mechanism, but may be another known clamp mechanism, or the fixed blade 3 is not semicircular but is circular. It may be a blade that does not use a clamp mechanism. The clamp block 53 is forcibly returned by the swinging return lever 6, but the clamp block 53 is formed with an inclined surface without arranging the return lever 6, and a return pin 62 in contact with the inclined surface is used. It may be a structure. Although the pressing pin 55 is driven by the cylinder mechanism by fluid pressure, it may be driven by an electromagnetic force using a coil and a solenoid, or may be a cam mechanism mechanically interlocked with the movable blade holding member 41 . The return pin 62 is attached to the base 11, but may be attached to the airframe 2.

Claims (6)

A fixed blade attached to the airframe to support the delivered material to be cut;
A movable blade holding member movably attached to the fixed blade relative to the fixed blade;
A movable blade which is attached to the movable blade holding member and shears the material to be cut by a shearing force acting between the movable blade and the fixed blade;
The movable field holding member is attached and movably provided in a direction parallel to the moving direction of the movable blade holding member, and when shearing the material to be cut, the opposite side of the material to be cut on the movable blade side A pressing member having a pressing surface for pressing and holding the movable blade with the movable blade;
A pressing member side inclined surface formed on the back surface of the pressing surface on the pressing member;
It has a clamp block side inclined surface attached to the movable blade holding member and formed at the same inclination angle as the pressing member side inclined surface, and provided movable in a direction orthogonal to the moving direction of the movable blade holding member Clamp block, and
When the material to be cut is sheared, the clamp block is moved in a direction perpendicular to the moving direction of the movable blade holding member, and the pressing member side inclined surface is pressed by the clamp block side inclined surface. And a pressing drive source for pressing the material to be cut by a pressing surface. In the cutting device according to claim 1,
The pressing drive source is
It is attached to the machine body, and when shearing the material to be cut, one end of the clamp block is pressed to move the clamp block in a direction orthogonal to the moving direction of the movable blade holding member. Cutting device. In the cutting device according to claim 2,
A return lever pivotally attached to the movable blade holding member and having one end engaged with the clamp block;
When the movable blade holding member is attached to the machine body and moved to a position where shearing of the workpiece is completed, the other end of the return lever is engaged to swing the return lever, and the clamp block side And a return pin for moving the clamp block in a direction in which the inclined surface moves away from the pressing member-side inclined surface. In the cutting device according to claim 3,
The return pin is movably attached to the machine body in a direction parallel to the moving direction of the movable blade holding member, and is biased in the pressing direction by a first spring member. Cutting device. In the cutting device according to claim 1,
The pressing drive source is
It is attached to the movable blade holding member, and when shearing the material to be cut, one end of the clamp block is pressed to move the clamp block in a direction orthogonal to the moving direction of the movable blade holding member. Cutting device characterized by In the cutting device according to claim 2 or 5,
The cutting device according to claim 1, wherein the pressing member is biased in a counter pressing direction by a second spring member provided between the pressing member and the movable blade.

Images