KR20190041419A - Cutting Apparatus - Google Patents

Abstract

The present invention relates to a cutting apparatus for an object to be cut, such as a steel bar, a wire, and the like, capable of supporting the object to be cut with respect to a moving blade by a sufficient clamping force in cutting. According to the present invention, a moving blade holding member (41) is fixed in a circular holding hole (42) formed in a moving blade holding member (41) by a bolt (43). In the moving blade holding member (41), a pressing member (5) is mounted on the lower side of the moving blade (4) and a clamping block (53) is supported on the lower side of the pressing member (5) to be able to move in the left/right direction of figure 1. A pressing pin (55) is supported to the right surface side of the clamping block (53) to be able to move in a left/right direction of the figure 1. On a side surface of a body (2), a cylinder (pressing driving source) (56) is mounted on a position facing the pressing pin (5) and a piston (57) is press-fit to be able to move in the left/right direction of the figure 1.

Description

{Cutting Apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting apparatus for cutting a workpiece such as a bar steel or a wire. More specifically, the present invention relates to a cutting apparatus for cutting a bar, a wire or the like with a fixed number of billets as a forging billet, for example.

In order to manufacture a forged product or the like, which is a metal part, it is necessary to first cut a desired length, called a bill, from a material to be cut, such as a bar or the like, with a cutting device. In the case of a forged product, in the subsequent processing step, the billet is put into a press mold at room temperature without being heated in a heating furnace or heated. Generally, a billet is manufactured as a final part through a forging process, a machining process, and the like. BACKGROUND ART [0002] A cutting apparatus for cutting a workpiece such as a bar or the like by shearing is popular because it can be cut at a high speed and no chips are produced. In this cutting apparatus, a fixed blade and a movable blade, such as a circular or semicircular shape, are used in accordance with the shape of the cut material. At the time of cutting, there is a gap between the workpiece to be cut and the fixed blade and the movable blade. The reason is that when there is no clearance between the workpiece to be cut and the fixed blade and the movable blade when the workpiece to be cut having a variation in external dimensions is transferred in the axial direction at the time of shearing, And the cut material is interfered with.

On the other hand, in order to increase the shearing accuracy such as securing the flatness of the front end face, shearing is performed between the workpiece to be cut and the fixed and movable ends at the time of shearing in a state in which there is no gap and is clamped strongly desirable. In order to eliminate the gap between the cut material and the movable blade, it has been proposed to clamp the cut material to the movable blade by supporting the cut material from the lower part with the opposite pressing part having an inclined surface One). In the mechanism described in Patent Document 1, the cut material is supported on a movable blade by pushing up the cut material from a lower side to a movable blade by a hydraulic cylinder from the lower side. However, since the clamping force by the hydraulic cylinder is clamped by the reaction force from the fixed portion of the machine body or the like, the force acts to attenuate the shearing force, and a sufficient clamping force of the material can not be ensured at the time of shearing .

As described above, the clamping force of the member to be cut to the movable blade on the movable blade side at the time of the front end is not sufficient. In the fixed blade, since the cut material is clamped from above at the time of shearing, it has been proposed to clamp the cut material to the fixed blade in a moving block having an inclined plane (Patent Document 2). On the other hand, in order to increase the cutting speed, it is necessary to move the cut material smoothly at a high speed, and therefore, a proper clearance is required between the cut material, the fixed blade and the movable blade. In other words, contradictory problems are required in the shearing of the cut material and the non-switching.

Japanese Laid-Open Patent Publication No. 06-79519 Japanese Laid-Open Patent Publication No. 2015-85407

The present invention has been made in the above-described background, and achieves the following objects. SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting apparatus for cutting a workpiece such as a bar or a wire which can grasp a workpiece with a sufficient clamping force against a movable blade at the time of shearing.

The present invention adopts the following means in order to solve the above problems.

That is, the cutting apparatus according to the first aspect of the present invention includes: a fixed blade mounted on a main body for supporting a fed material to be cut, a movable blade holding member movably mounted on the fixed blade, A movable blade mounted on the member and shearing the cut material with a shearing force acting between the movable blade holding member and the movable blade holding member, and a movable blade holding member mounted on the movable blade holding member and movable in a direction parallel to the moving direction of the movable blade holding member A pressing member which is movably provided and which has a pressing surface for pressing the opposite side of the movable blade side of the cut material to be sandwiched between the movable blade and the pressing blade when shearing the cut material; A pressing member side slope surface formed on a back surface of the pressing surface, and a clamping block side slope mounted on the movable blade holding member and formed at the same inclination angle as the pressing member side slope surface A clamping block provided on the movable blade holding member so as to be movable in a direction orthogonal to the moving direction of the movable blade holding member and a clamping block provided on the movable blade holding member so as to move the clamping block in a direction And a pressing drive source for pressing the pressing member side slope surface with the clamping block side slope surface to press the cut material with the pressing surface of the pressing member.

According to a second aspect of the present invention, there is provided a cutting apparatus according to the first aspect of the present invention, wherein the pressurizing drive source is mounted on the main body and presses one end of the clamping block, And is moved in a direction perpendicular to the moving direction of the holding member.

A cutting apparatus according to a third aspect of the present invention is the cutting apparatus according to the second aspect of the present invention, further comprising: a return lever swingably mounted on the movable blade holding member and having one end engaged with the clamping block; When the movable blade holding member is moved to a position where the movable blade holding member is moved to a position where the movable blade holding member is moved to the closed position, And a return pin for moving the movable member.

The cutting device according to the fourth aspect of the present invention is the cutting device according to the third aspect of the present invention, wherein the return pin is movably mounted on the main body in a direction parallel to the moving direction of the movable blade holding member, And is biased in the direction of the arrow.

The cutting device according to the fifth aspect of the present invention is the cutting device according to the first aspect of the present invention, wherein the pressurizing drive source is mounted on the movable blade holding member and presses one end of the clamping block, The movable blade holding member is moved in a direction perpendicular to the moving direction of the movable blade holding member.

The cutting apparatus of the present invention 6 is characterized in that in the present invention 2 or 5, the pressing member is biased in the semi-pressing direction by a second spring member provided between the pressing member and the movable blade .

Since the pressing member for clamping the workpiece to the movable blade is mounted on the movable blade holding member, the clamping force is not attenuated at the time of the front end of the workpiece to be cut, and the clamping force at the time of shearing by the movable blade So that the projecting accuracy can be improved and a stable billet can be produced.

1 is a front view of a longitudinal section showing a cutting apparatus according to a first embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along line AA of Fig.
3 is a sectional view taken along the line BB of Fig.
Fig. 4 is a diagram corresponding to Fig. 1 showing a state immediately after the start of shearing.
Fig. 5 is an equivalent view of Fig. 1 showing a state immediately before the movable blade holding member reaches the descending end.
Fig. 6 is an equivalent diagram of Fig. 1 showing a state in which the movable blade retaining member has reached the descending end.
Fig. 7 is a vertical sectional front view showing a cutting apparatus according to a second embodiment of the present invention. Fig.
8 is a vertical sectional front view showing a state in which the bar material is clamped by operating a pressurizing drive source mounted on the movable blade holding member in the cutting apparatus of the second embodiment of Fig.

[First Embodiment of Cutting Apparatus]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a front view of a longitudinal section 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 in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 3, the cutting apparatus 1 according to the first embodiment of the present invention is a cutting apparatus having a long bar material (a cut material to be cut) which is fed from a bar material feeding device (not shown) to the stopper 12 side, ) 13 is sheared by a relative movement between the fixed blade 3 and the movable blade 4 to produce a billet. The main body 2 is fixed to the base 11 of the cutting apparatus 1 with bolts (not shown), and the fixed blade 3 and the movable blade 4 are assembled to the main body 2.

2 and 3, the fixed blade 3 has a holding hole 26 on the right end surface (shown in the drawing) of a holding cylinder 21 hollow cylindrical and fixed to the shaft portion of the main body 2, And are fixed by bolts 31, The fixed blade 3 is formed in a semicircular shape, and a semicircular blade portion 32 is formed on the upper surface thereof. 2, a hollow cylindrical guide bush 25 is fixed to the shaft portion of the holding cylinder 21 and the rod member 13 is guided by the guide bush 25 to smoothly move the rod member 13 toward the stopper 12 side Lt; / RTI > A movable blade holding member 41 is mounted on the main 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 main body 2. A movable blade holding member 41 in the form of a rectangular plate is movably mounted on the guide groove 22 in a vertical direction. The movable blade holding member 41 is driven by a vertically driving mechanism such as a crank, a hydraulic pressure, and a lever mechanism (not shown).

The movable blade 4 is fixed to the cylindrical holding hole 42 formed in the movable blade holding member 41 by bolts 43 and 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 a lower surface thereof. A rectangular plate-like connecting plate 45 extending horizontally in the left and right direction in FIG. 1 is integrally formed at the upper end of the movable blade holding member 41, and guide rods 46 And 46 are mounted. The guide rods 46 and 46 in the shape of a cylinder are arranged parallel to the guide grooves 22 in Fig. 1 and guide rods 46 and 46 are fixed to the guide bushes 47 and 47 fixed to the side surface of the main body 2. [ Is slidably fitted in the up-and-down direction, and guides the movable-blade holding member 41. The movable blade 4 fixed to the movable blade retaining member 41 is moved in the vertical direction in Figures 1 and 2 so that the blade portion 32 of the fixed blade 3 and the blade portion 44 of the movable blade 4 The billet 13 is sheared by the shearing force between the billet 13 and the billet 13 to form a billet.

[Movable blade clamping mechanism]

On the other hand, the movable blade 4 is provided with a pressing member 5 on the movable blade 4. A rectangular guide groove 48 is formed in the lower portion of the holding hole 42 in the movable blade retaining member 41. The movable blade retaining member 41 has a rectangular guide groove 48 in the up and down direction And the pressing member 5 is fitted so as to be movable in a direction parallel to the moving direction. A pressurizing shoe 51 is fixedly attached to an upper portion of the pressing member 5 to support the bar stock 13 (and the billet that has been sheared). The pressing surface of the pressing shoe 51 is semicircular in section so as to conform to the outer shape of the bar material 13. [ The pressing member 5 supports the bar material 13 (and the sheared billet) until the front end of the bar material 13 is finished when the movable blade 4 descends. On the lower surface (back surface) of the pressing member 5, a pressing member side inclined surface 52 which rises to the right in Fig. 1 is formed. The inclination angle of the pressing member side slope surface 52 is 6 degrees in this example.

The movable blade retaining member 41 is supported by the clamping block 53 so as to be movable in the left and right direction in FIG. 1 (in the direction perpendicular to the moving direction of the movable blade retaining member 41) below the pressing member 5 have. On the upper surface of the clamping block 53, a clamping block side inclined surface 54 rising to the right in Fig. 1 is formed. The inclination angle of the clamping block side inclined face 54 is formed to be equal to that of the pressing member side inclined face 52 by 6 degrees. In short, the pressing member 5 and the clamping block 53 constitute a wedge mechanism. A pressing pin 55 is movably supported on the movable blade holding member 41 on the right side (on the drawing) side of the clamping block 53 so as to be movable in the left and right directions in Fig.

A cylinder (pressurizing drive source) 56 is mounted on the right side (in the drawing) of the main body 2 at a position opposed to the pressing pin 55 in Fig. 1, and the piston 57 is moved in the left- And is slidably fitted. A third spring member 58 is inserted between the left side surface (the drawing) of the clamping block 53 and the guide groove 48 and the clamping block 53 and the pressing pin 55 are inserted in the right direction (Half pressing direction). Second spring members 59 and 59 are inserted between the upper surface of the pressing member 5 and the lower surface of the movable blade 4 to bias the pressing member 5 in the downward direction . 1, the piston 57, the clamping block 53, and the pressing pin 55 are located at the right end position in Fig. 1, and the pressing member (the movable blade holding member 41) 5) in the direction away from the bar 13 (semi-pressing direction). Therefore, when the rod member 13 passes the blade member 44 of the movable blade 4, a gap is formed on the upper side and the lower side of the rod member 13.

A return lever 6 is swingably mounted on the movable blade holding member 41 below the clamping block 53. The return lever 6 is swingably mounted in a plane parallel to the plane 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 clamping block 53. 1 and 2, a return pin 62 is mounted movably in the vertical direction in Figs. 1 and 2 on the base 11 below the return lever 6. The return pin 62 is constantly biased upward (pressing direction) by the first spring member 63.

The lower end (the other end) of the return lever 6 comes into contact with the upper end of the return pin 62 when the movable blade holding member 41 descends and the front end of the rod 13 is completed. 1 so that the clamping block 53 is moved in the rightward direction in Fig. 1 and the clamping block side slope 54 is moved from the pressing member side slope 52 The pressing member 5 is spaced apart from the bar 13.

[Fixed blade side clamping mechanism]

As shown in Figs. 2 and 3, on the upper portion of the fixed blade 3, a semicircular fixed blade pressing member 7 is mounted. A semi-circular pressing portion 71 is formed on the lower surface of the fixed blade side pressing member 7 so that the pressing portion 71 presses the outer peripheral portion of the rod 13 from above, Portions 71 cooperate to hold and press the bar material 13 while restraining the bar material 13 in the vertical direction and the horizontal direction. The fixed blade-side pressing member 7 is provided with fourth spring members 72, 72 between the fixed blade 3 and the upper surface thereof. The fourth spring members 72 and 72 push the fixed blade side pressing member 7 upward by the biasing force of the fourth spring members 72 and 72 and press the fixed blade side pressing member 7 And is constantly biased in a direction away from the bar 13 (half pressing direction). Therefore, when the rod member 13 passes over the blade member 32 of the fixed blade 3, a gap is formed around the rod member 13.

On the upper surface of the fixed blade-side pressing member 7, a pressing member-side inclined surface 73 which rises to the right in Fig. 3 is formed. The inclination angle of the pressing member side slope surface 73 is 6 degrees. On the main body 2, a clamp lock 74 is mounted on the upper side of the fixed blade 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 clamping block side inclined surface 75 that rises to the right in Fig. 3 is formed. The inclination angle of the clamping block side inclined surface 75 is formed to be equal to the inclination angle of the pressing member side inclined surface 73. A cylinder 76 is mounted on the right side of the clamp lock 74 and a left end of the piston rod 77 of the cylinder 76 is screwed into the female thread of the right end of the clamping block 74 and fixed thereto . Therefore, when the cylinder 76 is operated, the clamping block 74 moves in the left-right direction in Fig.

When the cylinder 76 is operated in the retreating direction (the right direction in Fig. 3) by switching the electromagnetic valve (not shown) to the retreating (pressurizing) side, the clamping block 74, via the piston rod 77, To the right. The clamping block side inclined surface 75 of the clamping block 74 presses the pressing member side inclined surface 73 of the fixed blade pressing member 7 and presses the pressing portion 71 of the fixed blade pressing member 7, The rod 13 is pressed and clamped. The inclination angle of the clamping block side slope 75 and the pressing member side slope 73 is 6 degrees. This inclination angle is formed at an angle smaller than the friction angle between the pressing member side slope surface 73 and the clamping block side slope surface 75. Therefore, even if a large reaction force acts on the fixed blade side pressing member 7 at the time of the front end of the bar 13, the clamping block 74 and the piston rod 77 are moved in the leftward direction ) Does not return. Therefore, splashing of the rod material 13 at the time of shearing is solved, and the shearing accuracy is improved, and a stable billet can be produced.

[Emission mechanism of billet]

2, a through hole 23 formed in the holding cylinder 21 and a through hole 33 formed in the fixed blade 3 are provided with a billet having been subjected to shearing to a collection chute (not shown) And a rod-shaped pin insertion pin 24 for moving the pin is provided so as to be movable forward and backward (in the lateral direction of FIG. 2). This car intake pin 24 moves in the forward and backward directions in conjunction with the front end motion by the movable blade 4 and carries the vehicle to the side of the recovery chute (not shown) where the front end is completed. The fixed blade 3, the fixed blade pressing member 7, the guide bush 25, the movable blade 4, and the movable blade 4, corresponding to the diameter of the bar member 13 to be sheared, The pressure member 5 and the pressure shoe 51 are simultaneously exchanged for a set.

[Shearing operation of cutting apparatus 1]

Next, a shearing operation of the cutting apparatus 1 according to the first embodiment of the present invention will be described. First, a rod feeder (not shown) is operated to feed the long rod 13 in the right direction in Fig. 2, and the tip end of the rod 13 (the right end of the rod 13 in Fig. 2) So that the rod member 13 is fed by a predetermined length. Next, the piston 77 of the cylinder 76 is moved in the rightward direction in Fig. 3, and the pressing member side slope 73 of the fixed blade side pressing member 7 on the clamping block side slope 75 of the clamping block 74 And the rod member 13 is pressed and clamped by the pressing portion 71 of the fixed blade pressing member 7. Next, hydraulic pressure is supplied to the cylinder 56 of Fig. 1 to move the piston 57 in the left direction, the clamping block 53 is moved in the left direction by the pressing pin 55, The blade member 13 is pressed and clamped by the blade portion 44 and the pressing surface of the pressing shoe 51 of the pressing member 5. Next, the movable blade 4 fixed to the movable blade retaining member 41 is moved in the downward direction in Fig. 1 by operating a not-shown up-and-down driving mechanism such as a known crank mechanism, hydraulic cylinder, lever mechanism, The front end of the bar 13 is started. Fig. 4 is a view corresponding to Fig. 1 showing a state immediately after the start of shearing, that is, an equivalent view.

When the movable blade holding member 41 is further moved downward, the front end of the bar stock 13 by the movable blade 4 and the fixed blade 3 continues. Fig. 5 is an equivalent view of Fig. 1 showing a state immediately before the movable blade holding member 41 reaches the descending end. 5, when the movable blade retaining member 41 moves downward, the right end surface of the pressing pin 55 is spaced from the left end surface of the piston 57. As shown in Fig. However, the inclination angle of the pressing member side slope surface 52 and the clamping block side slope surface 54 is 6 degrees. This inclination angle is formed at an angle smaller than the friction angle between the pressing member side slope surface 52 and the clamping block side slope surface 54 so that a large reaction force is applied to the pressing member 5 The clamping block 53 and the pressing pin 55 do not return to the right direction (ANK lamp direction) due to the effect of the wedge.

5, the front end of the bar 13 is completed, and the billet 14 is cut off. The cutting apparatus 1 of the first embodiment of the present invention is provided with the pressing member 5 for clamping the bar 13 to the movable blade 4 and the clamping block 53 mounted on the movable blade holding member 41 . Therefore, since the clamping force is not attenuated at the time of the front end of the rod 13, the splashing of the rod 13 at the time of shearing by the movable blade 4 is eliminated and the shear accuracy is improved, have. Fig. 6 is a view corresponding to Fig. 1 showing a state in which the movable blade retaining member 41 further moves downward and the movable blade retaining member 41 has reached the downward end. 6, the lower end (the other end) of the return lever 6 comes into contact with the upper end of the return pin 62 when the movable blade holding member 41 reaches the lower end. 6 so that the clamping block 53 and the pressing pin 55 move in the rightward direction in Fig. 1 and the pressing shoe 51 of the pressing member 5 So that the pressure surface is spaced apart from the billet 14. Thus, the clamp of the billet 14 is released.

Next, the car inner fin 24 shown in Fig. 2 moves to the right in Fig. 2, and carries the billet 14 whose front end is completed to the recovery chute side not shown. Next, as shown in Fig. 6, the cylinder 56 is operated to move the piston 57 to the rightward moving end. Further, the cylinder 76 is operated in the leftward direction in Fig. 3, and the clamping block 74 is moved in the leftward direction in Fig. 3 through the piston rod 77. [ The clamping block side inclined surface 75 of the clamping block 74 is spaced apart from the pressing member side inclined surface 73 of the fixed blade pressing member 7 and the pressing portion 71 of the fixed blade pressing member 7 is fixed to the rod member 13 . Next, the movable blade holding member 41 moves upward to return to the initial state shown in Fig. 1, and the shearing operation is completed.

[Second Embodiment of Cutting Apparatus]

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. Fig. 7 is a vertical sectional front view showing the cutting apparatus 100 according to the second embodiment of the present invention. Fig. 8 is a sectional view of the cutting apparatus 100 according to the second embodiment of Fig. 7, Fig. 3 is a front view of a longitudinal section showing a state in which a rod is clamped by operating a driving source. The cutting apparatus 100 according to the second embodiment of the present invention is an example in which a pressurizing driving source for pressing a bar material with a pressing member at the time of bar material shearing is attached to the movable blade holding member. In the following description, only the parts different from the cutting device 1 of the first embodiment will be described, and the same parts as those of the cutting device 1 of the first embodiment will be denoted by the same reference numerals.

[Movable blade clamping mechanism]

The cutting device 100 of the second embodiment is configured such that the vertical direction (the direction parallel to the moving direction of the movable blade holding member 41) of FIG. 7 is set in the rectangular guide groove 48 of the movable blade holding member 41, And the pressing member 8 is fitted to be movable. On the right half of the lower surface (back surface) of the pressing member 8, a pressing member side inclined surface 821 rising to the right in Fig. 7 is formed. In addition, on the left half of the lower surface (back 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 slope surfaces 821 and 822 is 6 degrees in this example. The movable blade holding member 41 is provided with a clamping block 831 on the lower side of the right half of the lower surface of the pressing member 8 so as to move in the left and right direction in FIG. 7 (a direction perpendicular to the moving direction of the movable blade holding member 41) Are supported.

On the upper surface of the clamping block 831, a clamping block side inclined surface 841 rising to the right in Fig. 7 is formed. A clamping block 832 is movably supported on the lower side of the left half of the lower surface of the pressing member 8 in the left and right directions in Fig. On the upper surface of the clamping block 832, a clamping block side inclined surface 842 rising to the left in Fig. 7 is formed. The inclination angles of the clamping block side inclined faces 841 and 842 are formed at the same 6 degrees as the pressing member side inclined faces 821 and 822. A cylinder (pressurizing drive source) 861 is formed at a position opposed to the right side surface of the clamping block 831 in the movable blade retaining member 41 and the piston 871 is slidably fitted in the left and right direction in Fig. 7 have. A cylinder (pressurizing drive source) 862 is formed at a position opposed to the left side surface of the clamping block 832 in the movable blade retaining member 41. The piston 872 is slidable in the left- Is fitted.

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 so that the pistons 871 and 872 operate. Third spring members 88 and 88 are inserted into the spring insertion hole 811 of the clamping block 831 and the spring insertion hole 812 of the clamping block 832, respectively. A pin (85) is sandwiched between the third spring members (88, 88). Therefore, the clamping block 831 is normally biased in the rightward direction (semi-pressing direction) in Fig. 7, and the clamping block 832 is always biased in the left direction (semi-pressing direction) in Fig. 7, the piston 871 and the clamping block 831 are in the rightward end position in Fig. 7, and the piston 872, the clamping block 832 (the movable blade holding member 41) Is moved in the direction (semi-pressing direction) in which the pressing member 8 is separated from the bar member 13 at the left end position in Fig.

Therefore, when the rod member 13 passes the blade member 44 of the movable blade 4, a gap is formed in the upper and lower portions of the rod member 13. In the cutting apparatus 100 of the second embodiment, the return lever 6 and the return pin 62 of the cutting apparatus 1 of the first embodiment are not mounted because they are unnecessary.

[Shearing operation of cutting apparatus 100]

Next, the front end operation of the cutting apparatus 100 according to the second embodiment of the present invention will be described. First, a rod feeder (not shown) is operated to feed a long-length rod 13 by a predetermined length. Next, the rod member 13 is pressed and clamped by the pressing portion 71 of the fixed blade side pressing member 7 in Fig. 8, compressed air is supplied to the air supply passages 891 and 892 formed in the movable blade retaining member 41 to move the piston 871 in the leftward direction and move the piston 872 in the left- Move to the right. The clamping block 831 moves in the left direction and the clamping block 832 moves in the right direction so that the pressing force of the blade portion 44 of the movable blade 4 and the pressing shoe 51 of the pressing member 8 The rod 13 is clamped by pressing it. Next, the movable blade 4 fixed to the movable blade retaining member 41 is moved in the downward direction in Fig. 8 by operating a vertically driving mechanism such as a crank, a hydraulic pressure and a lever mechanism (not shown) Lt; / RTI >

The front end of the bar 13 is continued by the movable blade 4 and the fixed blade 3 so that the front end of the bar 13 is finished and the billet 14 ) Is cut off. The cutting apparatus 100 according to the second embodiment of the present invention includes a pressing member 8 for clamping the bar 13 to the movable blade 4, clamping blocks 831 and 832, a cylinder (pressurizing drive source) 861 And 862 are attached to the movable blade holding member 41. As shown in Fig. Therefore, since the clamping force is not attenuated at the time of the front end of the rod 13, the splashing of the rod 13 at the time of shearing by the movable blade 4 is eliminated and the shear accuracy is improved, have. Since the cylinders (pressurizing drive sources) 861 and 862 are mounted on the movable blade retaining member 41, the distance between the piston 57 and the press pin 55 when the movable blade retaining member 41 moves Abrasion and abrasion between the return lever 6 and the return pin 62 when the movable blade retaining member 41 is moved are eliminated, so that the durability is improved. It is also possible to operate the cylinders (pressurizing drive sources) 861 and 862 at optimum timing, regardless of the moving position of the movable blade retaining member 41. [

The movable blade holding member 41 is further moved downward and the compressed air supplied to the air supply passages 891 and 892 is stopped when the movable blade holding member 41 reaches the descending end and the air supply passage 891 , 892) to the atmosphere. Then the clamping block 831 is moved in the rightward direction by the biasing force of the third spring members 88 and 88 and the clamping block 832 is moved in the leftward direction so that the pressing shoe 51 are spaced apart from the billet 14. Thus, the clamp of the billet 14 is released.

Next, the car inner fin 24 shown in Fig. 2 moves to the right in Fig. 2, and carries the billet 14 whose front end is completed to the recovery chute side not shown. Next, the cylinder 76 is also operated in the leftward direction in Fig. 3, and the clamping block 74 is moved in the leftward direction in Fig. 3 through the piston rod 77. [ The clamping block side inclined surface 75 of the clamping block 74 is spaced apart from the pressing member side inclined surface 73 of the fixed blade pressing member 7 and the pressing portion 71 of the fixed blade pressing member 7 is fixed to the rod member 13 . Next, the movable blade retaining member 41 moves upward, returns to the initial state of Fig. 7, and the shearing operation is completed.

[Other Embodiments]

The embodiment of the present invention has been described above, but the present invention is not limited to this embodiment. For example, in the above-described embodiment, the clamping mechanism of the rod 13 of the fixed blade 3 is a wedge mechanism, but other known clamping mechanisms may be used, or the fixed blade 3 may be a circular blade , Or a clamp mechanism may not be used. The clamping block 53 is forced to return the clamping block 53 by the swinging lever 6 but the clamping block 53 is not provided with the lever 6 and the return pin 62 is in contact with the slanting face, The same structure may be used. The pressing pin 55 is driven by a cylinder mechanism based on fluid pressure, but 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. Although the return pin 62 is mounted on the base 11, it may be mounted on the main body 2.

1, 100 ... Cutting device
11 ... Base
12 ... stopper
13 ... Bar
14 ... Billet
2… main body
21 ... Maintenance bucket
22 ... Guide groove
23 ... Through hole
24 ... Car pin
25 ... Guide bush
26 ... Retaining hole
3 ... Fixed blade
31 ... volt
32 ... Flap
33 ... Through hole
4… Movable blade
41 ... The movable blade holding member
42 ... Retaining hole
43 ... volt
44 ... Flap
45 ... Connecting plate
46 ... Guide rod
47 ... Guide bush
48 ... Guide groove
5 ... Pressing member
51 ... Pressure shoe
52 ... The pressing member side slope surface
53 ... Clamping block
54 ... Clamping block side slope
55 ... Pressure pin
56 ... cylinder
57 ... piston
58 ... The third spring member
59 ... The second spring member
6 ... Return lever
61 ... Pivot pin
62 ... Return pin
63 ... The first spring member
7 ... Fixed blade side pressing member
71 ... The pressing portion
72 ... The fourth spring member
73 ... The pressing member side slope surface
74 ... Clamping block
75 ... Clamping block side slope
76 ... cylinder
77 ... Piston rod
8… Pressing member
811, 812 ... Spring insertion hole
821, 822 ... The pressing member side slope surface
831, 832 ... Clamping block
841, 842 ... Clamping block side slope
85 ... pin
861, 862 ... cylinder
871, 872 ... piston
88 ... The third spring member
891, 892 ... Air supply passage

Claims (6)

A fixed blade mounted on the main body for supporting the fed material to be cut,
A movable blade holding member movably mounted on the fixed blade,
A movable blade mounted on the movable blade holding member and shearing the cut material with a shearing force acting between the movable blade holding member and the fixed blade,
The movable blade holding member is mounted on the movable blade holding member and is movable in a direction parallel to the moving direction of the movable blade holding member and presses the opposite side of the cut blade to the movable blade side when shearing the cut material A pressing member having a pressing surface for pinching the movable blade,
A pressing member side inclined surface formed on a back surface of the pressing surface of the pressing member,
A clamping block mounted on the movable blade holding member and having a clamping block side inclined surface formed at the same inclination angle as the pressing member side inclined surface and movable in a direction perpendicular to the moving direction of the movable blade holding member;
The clamping block is moved in a direction orthogonal to the moving direction of the movable blade holding member and the pressing surface of the pressing member is pressed against the pressing surface of the pressing member by the clamping block side slope, And a pressurizing drive source for pressurizing the workpiece to be cut. The method according to claim 1,
The pressure-
Characterized in that the clamping block is mounted on the main body and presses one end of the clamping block when the workpiece is cut to move the clamping block in a direction perpendicular to the moving direction of the movable blade holding member Device. 3. The method of claim 2,
A return lever swingably mounted on the movable blade holding member and having one end engaged with the clamping block,
Wherein when the movable blade holding member is moved to a position where the front end of the cut material is completed, the return lever is engaged with the other end of the return lever to swing the return lever, and the clamping block- And a return pin for moving the clamping block in a direction away from the member side inclined surface. The method of claim 3,
Wherein the return pin is movably mounted to the main 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. The method according to claim 1,
The pressure-
Characterized in that the clamping block is mounted on the movable blade holding member and presses one end of the clamping block in the front end of the cut material to move the clamping block in a direction perpendicular to the moving direction of the movable blade holding member . 6. The method according to claim 2 or 5,
Wherein the pressing member is biased in the semi-pressing direction by a second spring member provided between the pressing member and the movable blade.

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