TW201636137A - Cutting device - Google Patents

Abstract

The invention provides a cutting device. A pressing member side inclined surface 65 of a pressing member 6 is pressed down by a clamping block side inclined surface 542 of a clamping block 54, and a bar material is pressed and clamped by a pressing part 621 of a pressing bush 62. An inclination angle [theta] between the clamping block side inclined surface 542 and the pressing member side inclined surface 65 is formed to be 6 degrees. The inclination angle [theta] is formed such that a component force of the pressing is smaller than the maximum friction force between the pressing member side inclined surface 65 and the clamping block side inclined surface 542. Therefore, even if a large reaction force is applied on the pressing member 6 when the bar material 13 is cut, the clamping block 54 and a piston rod 551 do not return to the left direction (unclamping direction). Bouncing of the bar material 13 is prevented during cutting, and a billet can be produced stably with improved cutting accuracy.

Description

Cutting device

The present invention relates to a cutting device for pressing a bar to perform cutting. More specifically, the present invention relates to a cutting device which is provided for cutting a bar for cutting a predetermined length from a bar, and cutting the bar by shearing. The device presses the bar that is fed out onto the stationary knife of the cutting device to perform the cutting.

When manufacturing a forged product or the like as a metal part, first, it is necessary to cut a desired length called a billet from a bar material as a raw material and take it out. In the case of a forged product, the billet is put into a press mold at a normal temperature in a subsequent heating step or without heating, in order to be plastically processed into a target shape. Usually, after such a forging step, a final part is produced through a machining step or the like. Therefore, if the quality of the billet is poor, it will directly result in the production of parts and finished products of poor quality. Therefore, the billet is required to have high quality that does not bend, deform, or the like.

In order to eliminate the bending, deformation, and the like of the billet, it is necessary to accurately determine the position of the bar at the cutting stage, to press the bar to approach the cutting blade, and to maintain the condition for cutting. Good bar retention. Patent The cutting device according to the first aspect is characterized in that the pressing member for pressing the bar is provided to face the fixed blade with the bar interposed therebetween, and the pressing member abuts the fixed blade against the fixed blade. Press on the opposite side. As a result, the bar is cut by the fixed blade and the movable blade in a state where the bar is clamped and fixed to the portion close to the cutting position by the pressing member. Therefore, the bounce of the bar at the time of cutting is eliminated and cut. The breaking accuracy is improved, and a stable bad segment can be manufactured.

In the cutting device of Patent Document 1, the swing is performed with the fulcrum as a fulcrum A pressing member is provided at an intermediate portion of the lever, and an end portion of the lever that is spaced apart from the support shaft is driven by an oil hydraulic cylinder, and the pressing member presses the bar. Therefore, when the bar is cut, the rod exerts a large upward reaction force against the pressing member, and the rod slightly oscillates against the pressing force of the hydraulic cylinder with the fulcrum as a fulcrum, so that the bar slightly bounces Concerns about the adverse effects of the cutting accuracy of the bar. Further, since the rod covers the fixed blade or the pressing member from the upper portion, it is difficult to replace the fixed blade or the pressing member, and the cleaning operation around the fixed blade or the pressing member takes time.

[Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2013-13949

The present invention has been completed based on the above technical background, and the following objects are achieved.

An object of the present invention is to provide a cutting device which eliminates bounce of a bar at the time of cutting, and facilitates replacement of a fixed blade or a pressing member, and a cleaning operation around a fixed blade or a pressing member.

The problem can be solved by the following means.

That is, the cutting device according to the first aspect of the invention includes: a fixed blade attached to the base for supporting the fed bar; and a movable blade movably attached to the base with respect to the fixed blade On the stage, the bar is cut by a shearing force acting between the moving blade and the fixed blade; a pressing member sandwiching the bar, when the bar is cut For pressing the bar; the pressing member side inclined surface is provided on the pressing member; a clamp lever is swingably supported on a support shaft provided on the base, and the clamping block is Clamping block for movably supporting, the clamping block for pressing the pressing member against the bar member, and fixing member for fixing the clamping rod at a pressing position of the clamping lever The base block; the clamping block side inclined surface is disposed on the clamping block, formed at the same inclination angle as the pressing member side inclined surface; and pressing the driving source for the clamping rod Pressing the clamping block at a pressing position, pressing the pressing with the inclined side of the clamping block side Member inclined surface, whereby The bar is pressed by the pressing member.

The cutting device of the present invention 2 is characterized in that: The pressing member is disposed to face the fixed blade across the bar, and the clamping lever is at a position of a swing angle at the pressing position and the replacement of the fixed blade and/or the pressing member The way to swing between them is supported.

The cutting device of the present invention 3 is characterized in that: 1 or 2 of the present invention The angle of inclination of the inclined surface of the pressing member side and the inclined surface of the clamping block side is formed at an angle at which the component force when the pressing member presses the clamping block is the inclined surface of the pressing member and the clip The maximum friction between the inclined faces on the side of the block is below or equal to the maximum friction.

The cutting device of the present invention 4 is characterized by the present invention 1 or 2 The pressing member is biased in a direction opposite to the pressing direction by the spring member, and the spring member is provided between the pressing member and the fixed blade.

Since the cutting device of the present invention presses the bar by a wedge mechanism, a large pressing force is obtained, and since the inclination angle of the wedge is formed to be smaller than the friction angle, the wedge is not cut when the cutting is performed. It moves due to the reaction force from the bar, thereby eliminating the bounce of the bar. Moreover, since the wedge mechanism as a simple mechanism is used, it is easy to replace the fixed blade or the pressing member, and the cleaning operation around the fixed blade or the pressing member.

1‧‧‧cutting device

2‧‧‧Abutment

3, 8‧‧‧ fixed knife

4‧‧‧ moving knife

5‧‧‧Clamping rod

6‧‧‧ Pressing members

7‧‧‧ billet support pedestal

11‧‧‧Ontology

12‧‧‧stops

13‧‧‧Bars

21‧‧‧ Keep the tube

22‧‧‧T-slot

23‧‧‧through holes

24‧‧‧Top sales

25‧‧‧ Guide sleeve

26‧‧‧ Keeping holes

27‧‧‧ Guide slot

28‧‧‧ recess

31‧‧‧ bolt

32‧‧‧blade

33‧‧‧Bolt holes

34‧‧‧through holes

41‧‧‧ Keeping components

42‧‧‧blade

43‧‧‧Bolt holes

51‧‧‧ fulcrum

52‧‧‧ recess

53‧‧‧boot block

54‧‧‧ clamping block

55‧‧‧Hydraulic cylinder

56‧‧‧ bolt

57‧‧‧ nuts

58‧‧‧ slots

61‧‧‧ recess

62‧‧‧ Pressing bushing

63‧‧‧ bolt

64‧‧‧Spring components

65‧‧‧Sliding surface of the pressing member

71‧‧‧ pedestal support shaft

81‧‧‧ bolt

82‧‧‧blade

83‧‧‧Bolt holes

84‧‧‧through holes

85‧‧‧Fixed wedge

86‧‧‧ movable wedge

87‧‧‧ bolt

531‧‧‧ bolt

532‧‧‧T-slot

541‧‧‧T type sliding surface

542‧‧‧Clamping block side inclined surface

543‧‧‧ internal thread

551‧‧‧Piston rod

561‧‧‧ head

621‧‧‧ Pressing Department

851‧‧‧ sloped surface

861‧‧‧ sloped surface

871‧‧‧ nuts

A-A, B-B‧‧ section

Θ‧‧‧ tilt angle

Fig. 1(a) is a longitudinal sectional front view showing a cutting device according to an embodiment of the present invention, and Fig. 1(b) is a left side of Fig. 1(a) showing a bolt for fixing a clamp rod to a base. view.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1(a).

Fig. 3 (a) is a longitudinal sectional front view showing a state in which the clamp lever is swung to the replacement position, and Fig. 3 (b) is a left side view of Fig. 3 (a) showing the bolt for fixing the clamp rod to the base.

Fig. 4 is a longitudinal cross-sectional front view showing a state in which the fixed blade and the pressing member are removed from the base in Fig. 3(a).

Fig. 5(a) is a front view showing the clamp block and the guide block, and Fig. 5(b) is a left side view of Fig. 5(a).

Figure 6 is a front elevational view showing the fixed knife and the moving knife.

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 cross-sectional view taken along line B-B of Fig. 7;

Fig. 9 is a front elevational view showing a fixed blade and a movable blade according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described based on the drawings. Figure 1 (a) Fig. 1(b) is a left side elevational view of Fig. 1(a) showing a bolt for fixing a clamp rod to a base. Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1(a). Figure 3 (a) shows the swinging lever to the replacement Fig. 3(b) is a left side view of Fig. 3(a) showing a bolt for fixing a clamp rod to a base. Fig. 4 is a longitudinal cross-sectional front view showing a state in which the fixed blade and the pressing member are removed from the base in Fig. 3(a). Fig. 5(a) is a front view showing the clamp block and the guide block, and Fig. 5(b) is a left side view of Fig. 5(a). Figure 6 is a front elevational view showing the fixed knife and the moving knife.

As shown in Fig. 1 (a), Fig. 1 (b) to Fig. 3 (a), and Fig. 3 (b), the cutting device 1 according to the embodiment of the present invention is a self-bar supplying device (not shown). The long bar 13 sent to the stopper 12 side is cut by shear force to produce a billet which is generated by the relative movement of the fixed blade 3 and the moving blade 4. A base 2 (not shown) is fixed to the main body 11 of the cutting device 1 by bolts, and a fixed blade 3 and a moving blade 4 are assembled to the base 2, and a clamp device is attached, and the clamp is attached. A tightening device is used to secure the positioned bar (dashed line) 13.

As shown in Fig. 1(a), a support shaft 51 is provided at the right end of the base 2, and a clamp rod 5 is provided, the clamp rod 5 being centered on the support shaft 51, on the vertical plane ( In the surface parallel to the paper surface of Fig. 1(a), it is possible to swing between the pressing position and the replacement position. 1(a) and 1(b) show the pressing position of the clamp lever 5, and Figs. 3(a), 3(b) and 4 show the replacement position of the clamp lever 5. The right end side of the clamp lever 5 shown in Fig. 1(a) is swingably supported by the support shaft 51. In the middle portion of the clamping rod 5, formed In the shape of the concave portion 52, a guide block 53 is fixed to the concave portion 52 by a bolt 531 and a bolt 531, and is disposed in the upper bottom of the concave portion 52.

On the guiding block 53, in the left-right direction (on the drawing) of Fig. 1(a) A clamping block 54 as a wedge is movably supported. As shown in FIGS. 5(a) and 5(b), a T-shaped groove 532 extending in the left-right direction of FIG. 5(a) is formed on the lower surface of the guide block 53, and is formed on the upper surface of the clamping block 54. The T-shaped sliding surface 541 is fitted to the T-shaped groove 532, and is movably supported in the left-right direction of FIG. 5(a). On the lower surface of the clamp block 54, a clamp block side inclined surface 542 which is inclined upward on the right side in Fig. 5(a) is formed. The inclination angle θ of the clamping block side inclined surface 542 is formed to be 6 degrees in this example.

As shown in Fig. 1(a), a hydraulic cylinder (pressing drive source) 55 is attached to the right end portion of the clamp rod 5, and a left end portion of a piston rod 551 of the hydraulic cylinder 55 is screwed into the clamp block. The internal thread 543 of the right end portion of the 54 is fixed. Therefore, if the hydraulic cylinder 55 is operated, the clamp block 54 is guided by the guide block 53 and moves in the left-right direction of Fig. 1(a). At the pressing position of the clamp lever 5 shown in FIGS. 1(a) and 1(b), the clamp lever 5 is fixed to the base 2 by a bolt 56 as a fixing member and a nut 57. That is, the head portion 561 of the bolt 56 is inserted into the T-shaped groove 22 formed at the left end of the base 2, and the shaft portion of the bolt 56 is inserted into the U-shape (as viewed from the upper surface) formed at the left end of the clamp rod 5. In the groove 58, the nut 57 is fastened to the external thread of the bolt 56, and the left end of the clamp rod 5 is fixed to the base 2. When the nut 57 is removed from the external thread of the bolt 56 and the clamp lever 5 is swung clockwise about the support shaft 51, it becomes the one shown in FIG. 3(a), FIG. 3(b), and FIG. The replacement position of the clamping lever 5.

A fixed blade 3 is fixed to the holding hole 26 on the right end surface of the hollow cylindrical holding cylinder 21 by a bolt 31 and a bolt 31, and the holding cylinder 21 is fixed to the axial center portion of the base 2. As shown in FIG. 6, the fixed blade 3 is formed in a semicircular shape, and A blade portion 32 having a semicircular shape is formed on the upper surface. The fixed blade 3 is fixed to the holding cylinder 21 by a bolt 31 and a bolt 31 inserted into the bolt hole 33 and the bolt hole 33 (see FIG. 4). As shown in FIG. 4, a semicircular pressing member 6 is disposed on the upper surface of the fixed blade 3. A semicircular concave portion 61 is formed on the lower surface of the pressing member 6, and a semi-cylindrical pressing bush 62 is fitted into the concave portion 61, and is fixed by a bolt 63.

A pressing portion 621 having a semicircular shape is formed on the lower surface of the pressing bushing 62. The pressing portion 621 is located directly above the bar member 13, and the outer peripheral portion of the bar member 13 is pressed from the upper side by the pressing portion 621 in the up and down direction. And the bar 13 is restrained in the lateral direction. That is, the pressing portion 621 of the pressing bush 62 and the blade portion 32 of the fixed blade 3 are disposed to face each other with the bar member 13 interposed therebetween. In this manner, the fixed blade 3 and the pressing bushing 62 cooperate to restrain and press the bar 13 while restraining the bar 13 in the vertical direction and the lateral direction. As shown in Fig. 2, a hollow cylindrical guide bush 25 is fixed to the axial center portion of the holding cylinder 21, and is guided by the guide sleeve 25 to smoothly feed the rod 13 to the stopper 12 side. .

A spring member 64 and a spring member 64 are provided between the pressing member 6 and the upper surface of the fixed blade 3. The spring member 64 and the spring member 64 always push the pressing member 6 upward by the force applied by the spring member 64 and the spring member 64, and move the pressing member 6 in a direction away from the bar 13 (opposite direction of the pressing direction). Therefore, when the rod 13 passes over the blade portion 32 of the fixed blade 3, a gap is formed in the upper portion of the rod 13. On the upper surface of the pressing member 6, a pressing member side inclined surface 65 which is inclined upward (in the drawing) on the right side in Fig. 4 is formed. Pressing member side inclined surface 65 The inclination angle θ is formed to be the same as the inclination angle θ of the clamp block side inclined surface 542 by 6 degrees. As shown in FIG. 2, a groove is formed in the pressing member 6, and the clamping block 54 is slidably inserted into the groove. Therefore, when the clamp block 54 moves, the pressing member 6 moves freely up and down. As understood from the above description of the configuration, the clamping block 54 and the pressing member 6 constitute a wedge mechanism.

Replacement position of the clamping rod 5 shown in Fig. 3 (a), Fig. 3 (b), Fig. 4 The fixed blade 3, the pressing member 6, and the pressing bush 62 are simultaneously replaced in a set according to the diameter of the bar 13 to be cut. In the replacement position of the clamp rod 5 shown in FIGS. 3(a), 3(b), and 4, the upper portions of the fixed blade 3, the pressing member 6, and the pressing bush 62 are completely opened, so that it is easy to perform the fixed blade. 3. Replacement of the pressing member 6, and cleaning operation of the holding hole 26, the fixed blade 3, and the periphery of the pressing member 6. In the through hole 23 formed in the holding cylinder 21 and the through hole 34 formed in the fixed blade 3, an ejector pin 24 is provided for moving forward and backward, and the ejector pin 24 is used for cutting the finished blank The segment is ejected to a recovery chute (not shown). The ejector pin 24 moves forward and backward in conjunction with the cutting operation of the moving blade 4, and performs an operation of ejecting the cut billet toward the recovery chute side (not shown).

When the electromagnetic direction switching valve (not shown) is turned back (pressed) side cut When the hydraulic cylinder 55 is driven in the backward direction (the right direction in Fig. 1(a)), the clamp block 54 is moved in the right direction of Fig. 1(a) via the piston rod 551. The pressing member side inclined surface 65 of the pressing member 6 is pressed down by the clamping block side inclined surface 542 of the clamp block 54, and the bar 13 is pressed and clamped by the pressing portion 621 of the pressing bush 62. The inclination angle θ of the clamp block side inclined surface 542 and the pressing member side inclined surface 65 (refer to FIG. 4) In this example, it is formed at 6 degrees. When the vertical load applied to the pressing member 6 is W, the inclination angle of the pressing member side inclined surface 65 is θ, and the coefficient of static friction when the clamping block 54 is moved is set to μ, then vertical The component force to move the clamp block 54 due to the inclination angle θ generated by the pressing of the load W is Wsin θ.

Vertical resistance N of the pressing block 54 pressing against the pressing member side inclined surface 65 When N = Wcos θ, the maximum frictional force F when the clamp block 54 is moved along the pressing member side inclined surface 65 is F = μN = μWcos θ. Therefore, theoretically, if the component force on the inclined surface, that is, Wsin θ is equal to or equal to the maximum frictional force F, the clamping block 54 does not move regardless of the magnitude of the vertical load W. That is, the clamp block 54 does not move as long as it has the following relationship.

Wsinθ≦μWcosθ→sinθ≦μcosθ......[Formula 1]

For example, the clamping block 54 is a steel material and is sufficiently coated with a lubricant. If the static friction coefficient is assumed to be at least 0.1 or more, when the inclination angle θ is 6 degrees, the left side sin6°=0.10, and the right side μcos6°= 0.1×0.99=0.099, the above [Formula 1] is substantially established, and therefore, even when a large reaction force acts on the pressing member 6 at the time of cutting of the bar 13, the clamping block 54 and the piston rod 551 utilize the wedge. Increases the force without returning to the left (non-clamping direction). Therefore, the buckling of the bar 13 at the time of cutting is eliminated, and the cutting accuracy is improved, so that a billet having a stable size and no defect in quality can be produced. Further, at this time, the force P of the piston rod 551 pulling the clamp block 54 is P = Wtan (θ + ρ). Among them, μ is set to tanρ. It can be understood that with the wedge mechanism, a large vertical load W can be obtained with a small force P.

The moving blade 4 is adjacent to the fixed blade 3 and is in front of the pressing member 6 The face can move in the up and down direction. The moving blade 4 is fixed to the holding member 41, and the holding member 41 is moved forward and backward in the vertical direction by pressing the driving device with a moving blade (not shown). As shown in FIG. 6, the blade portion 42 and the blade portion 42 of the moving blade 4 have a semicircular shape and are formed symmetrically with respect to the fixed blade 3. The moving blade 4 is bolted to the holding member 41 via the bolt hole 43 and the bolt hole 43. Therefore, the blade portion 42 of the moving blade 4 can be reversed and replaced. Similarly to the moving blade 4, the fixed blade 3 can be formed in a symmetrical shape in which the blade portion 32 can be reversed. The bar 13 is cut into billets by the shearing force between the blade portion 32 of the fixed blade 3 and the blade portion 42 of the moving blade 4.

On the other hand, as shown in FIG. 2, a bad section is provided at the lower portion of the moving blade 4. A shoe 7 is supported for supporting the bar 13 (and the severed segment). The bad section receiving portion of the billet support pedestal 7 has a semicircular cross section, and the billet support pedestal 7 is fixed to the upper end of the pedestal support shaft 71. When the moving blade 4 is lowered, the billet support pedestal 7 supports the bar 13 (and the cut billet) by a supporting force proportional to the pressing force of the moving blade 4 until the cutting of the bar 13 is completed. . In addition, the structure of the billet support pedestal, the pedestal support shaft, and the like is a well-known technique (for example, Japanese Patent No. 5122491), and the present invention is not intended to be described.

After the bar 13 is cut, the electromagnetic direction switching valve is advanced (and pressed) The opposite side of the pressure is switched, and the hydraulic cylinder 55 is moved in the forward direction (left direction of Fig. 1 (a)) drive. The clamp block 54 is moved in the left direction of FIG. 1(a) via the piston rod 551. At this time, since the clamping force generated by the clamp block 54 and the pressing member 6 is released, the pressing portion 621 of the pressing bush 62 is separated from the bar 13 by the force applied by the spring member 64 and the spring member 64. Thereby, the upper side of the bar 13 is opened, and a predetermined gap is formed on the upper side of the bar 13. By opening the upper side of the rod 13, even a bar having a large variation in bending or diameter can be freely passed and moved on the upper portion of the fixed blade 3. Therefore, it is not affected by the state of the bar 13 supplied from the bar supply apparatus not shown. Further, since the spring member 64 and the spring member 64 are disposed, the pressing portion 621 of the pressing bush 62 is quickly separated from the bar 13, so that the responsiveness is improved and the cutting speed can be increased.

[Second Embodiment of Cutting Device]

Fig. 7 is a front cross-sectional view showing a cutting device according to a second embodiment of the present invention, Fig. 8 is a cross-sectional view taken along line BB of Fig. 7, and Fig. 9 is a front view showing a fixed blade and a moving blade according to a second embodiment of the present invention. . In the cutting device according to the second embodiment, the blade portion of the fixed blade is configured to be a symmetrical shape that can be reversed and replaced, similarly to the moving blade 4. In the following description, the same structural portions as those of the cutting device according to the first embodiment will be omitted. As shown in FIG. 7 to FIG. 9 , a fixed blade 8 is fixed to the right end surface of the hollow cylindrical holding cylinder 21 by a bolt 81 and a bolt 81 , and the holding cylinder 21 is fixed to the axial center portion of the base 2 . As shown in Fig. 9, the blade portion 82 and the blade portion 82 of the fixed blade 8 are symmetrically formed in a semicircular shape. The fixed blade 8 can be adjusted in the vertical direction along the guide groove 27 formed on the right end surface of the base 2 and the right end surface of the holding cylinder 21.

In the base 2, a recess 28 is formed in the lower portion of the guide groove 27, in the recess The lower surface of the portion 28 is fixed with a fixed wedge 85. The inclined surface 851 on the upper surface of the fixed wedge 85 is placed with an inclined surface 861 on the lower surface of the movable wedge 86. The movable wedge 86 is along the fixed wedge 85 in the left-right direction of FIG. It can move in the up and down direction. As seen from Fig. 7, the bolt 87 screwed into the left end surface of the base 2 is rotated, and the movable wedge 86 is moved in the left-right direction of Fig. 7, so that the fixed blade 8 is vertically moved on the upper surface of the movable wedge 86. The adjustment is such that the blade portion 82 of the upper portion of the fixed blade 8 coincides with the axis of the guide bush 25. Then, the nut 87 is fastened to the bolt 87, and the fixed blade 8 is fixed to the right end surface of the holding cylinder 21 by the bolt 81 and the bolt 81. As shown in FIG. 9, the fixed blade 8 is fixed to the holding cylinder 21 by a bolt 81 and a bolt 81 inserted into the bolt hole 83 and the bolt hole 83. The bolt hole 83 and the bolt hole 83 are formed in a long groove shape in the vertical direction. In the cutting device according to the second embodiment, since the fixed blade 8 can be adjusted in the vertical direction, even after the correction of the worn blade portion 82, the fixed blade 8 is adjusted in the vertical direction. The fixed knife 8 can still be reused, so it is preferable.

As shown in FIG. 7, on the upper surface of the fixed blade 8, the first embodiment is arranged. In the pressing member 6 and the pressing bushing 62 having the same shape, the pressing portion 621 presses the outer peripheral portion of the bar 13 from the upper side, and restrains the bar 13 in the vertical direction and the lateral direction. In other words, in the same manner as in the first embodiment, the pressing portion 621 of the pressing bush 62 and the blade portion 82 of the upper portion of the fixed blade 8 are disposed to face each other with the bar member 13 interposed therebetween. In this manner, the fixed blade 8 cooperates with the pressing bushing 62 to restrain and press the bar 13 while restraining the bar 13 in the vertical direction and the lateral direction. As shown in Figure 9, in the fixed knife 8, along the upper The through hole 84 is formed in a long groove shape in the downward direction, and the ejector pin 24 is provided so as to be movable forward and backward, and the ejector pin 24 ejects the cut billet to a recovery chute (not shown). In the same manner as the first embodiment, the ejector pin 24 moves forward and backward in conjunction with the cutting operation mechanism of the moving blade 4, and ejects the cut billet to the recovery chute side (not shown). action.

[other]

The blade portion 32 of the fixed blade 3 and the blade portion 82 of the fixed blade 8 are formed in a semicircular shape. However, although the fixed knife is a well-known technique, it may be cylindrical. At this time, the arrangement position of the pressing member 6 is not the position of the fixed blade, but is a position displaced rearward. Further, the shape of the clamping block 54 has an inclined surface only on one side, but may be a wedge that is inclined on both sides. The inclination angle is 6°, but for example, the angle of one side may be set to 3°, and the total inclination angle may be set to 6°.

In the cutting device according to the embodiment of the present invention, the inclination angle θ of the clamp block side inclined surface 542 and the pressing member side inclined surface 65 is formed at an angle that the pressing member presses the clip The component force of the compact block is equal to or equal to the maximum frictional force between the pressing member side inclined surface 65 and the clamp block side inclined surface 54, so that a large reaction force acts on the pressing even when the rod 13 is cut. The member 6, the clamping block 54, and the piston rod 551 also do not return in the unclamping direction. Therefore, the buckling of the bar 13 at the time of cutting is eliminated, the cutting accuracy is improved, and a stable billet can be produced. Further, since the upper portions of the fixed blade 3, the pressing member 6, and the pressing bushing 62 are completely opened at the position where the clamp lever 5 is replaced, it is easy to replace the fixed blade 3 and the pressing member 6, and the holding hole 26 and the fixed blade 3 The cleaning operation around the pressing member 6.

1‧‧‧cutting device

2‧‧‧Abutment

3‧‧‧ fixed knife

5‧‧‧Clamping rod

6‧‧‧ Pressing members

11‧‧‧Ontology

21‧‧‧ Keep the tube

22‧‧‧T-slot

24‧‧‧Top sales

26‧‧‧ Keeping holes

31‧‧‧ bolt

32‧‧‧blade

51‧‧‧ fulcrum

52‧‧‧ recess

53‧‧‧boot block

54‧‧‧ clamping block

55‧‧‧Hydraulic cylinder

56‧‧‧ bolt

57‧‧‧ nuts

58‧‧‧ slots

62‧‧‧ Pressing bushing

64‧‧‧Spring components

65‧‧‧Sliding surface of the pressing member

531‧‧‧ bolt

542‧‧‧Clamping block side inclined surface

551‧‧‧Piston rod

561‧‧‧ head

A-A‧‧‧ profile

Claims (4)

A cutting device comprising: a fixed knife mounted on a base for supporting a bar to be fed; and a movable blade movably mounted to the base relative to the fixed blade, acting on the base a shearing force between the moving knife and the fixed knife to cut the bar; a pressing member sandwiching the bar, for cutting the bar when the bar is cut a bar member; the pressing member side inclined surface is disposed on the pressing member; the clamping rod is swingably supported by the support shaft provided on the base, and the clamping block is movably supported, the clip a pressing block for pressing the pressing member against the bar; a fixing member fixing the clamping rod to the base at a pressing position of the clamping lever; and an inclined surface of the clamping block side, Provided in the clamping block, formed at the same inclination angle as the inclined surface of the pressing member; and a pressing driving source for moving the clamping block at a pressing position of the clamping lever, using the clamping The inclined block side inclined surface presses the pressing member side inclined surface, thereby utilizing the Pressing the rod pressing member. The cutting device according to claim 1, wherein the pressing member is disposed to face the fixed blade across the bar, The clamping lever is supported to be swingable between the pressing position and a swingable angular position at which the fixed knife and/or the pressing member can be replaced. The cutting device according to the first or second aspect of the invention, wherein the inclination angle of the pressing member side inclined surface and the clamping block side inclined surface is formed at an angle at which the pressing member presses The component force at the time of the clamping block is equal to or equal to the maximum frictional force between the pressing member side inclined surface and the clamping block side inclined surface. The cutting device according to claim 1 or 2, wherein the pressing member is biased by a spring member in a direction opposite to a pressing direction, and the spring member is provided to the pressing member and the fixed knife between.