JP3270260B2 - Cantilever cold shearing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cantilevered cold shearing machine for cold-shearing a material to be sheared, and more particularly to an improvement of a cantilevered cold shearing machine. The present invention relates to a cantilever type cold shearing machine which has the same sharpness as a double-supporting type cold shearing machine.

[0002]

2. Description of the Related Art As is well known, a cold shearing machine includes a double-supporting type in which a slide frame for raising and lowering an upper blade is supported by a portal frame, and an upper blade in a C-type frame. There are two types: a cantilever type that supports a slide frame. In either case, the upper blade is moved up and down to shear the material to be sheared cold.

[0003]

However, the above two types of cold shearing machines have the following advantages and disadvantages due to the difference in the support type of the upper blade, and can be used properly according to the purpose. ing. For example, the former double-supported cold shearing machine has the advantage that the sheared surface of the material to be sheared is clean and the recutting of the end is unnecessary and the yield is good, but the width direction between the upper blade and the lower blade is improved. Due to the strut frames on both sides, the rear end of the material to be sheared cannot be removed in the horizontal direction (width direction of the blade) as it is. However, there is a disadvantage that the time required for discharging the remaining portion is prolonged.

On the other hand, in the latter cantilever type cold shearing machine, as shown in FIG. An obliquely upward reaction force P acts on the blade 103. Here, assuming that the angle between the reaction force P and the vertical line is α, the reaction force P is Pcos α
And the vertical component Fv of Psin
and the horizontal component Fh of α. The reaction force P is received by the C-shaped frame. However, because of the horizontal component Fh, the support frame of the C-shaped frame tilts toward the exit side of the material to be sheared, and the upper frame is twisted. As shown in FIG. 5B in the explanatory diagram of the gap between the upper blade and the lower blade in FIG. 5B, the gap between the upper blade 103 and the lower blade 106 on the side of the support frame 101a of the C-shaped frame 101 is larger than
The gap S2 on the opening side of the C-shaped frame 101 increases.

[0005] The initial gap between the upper blade 103 and the lower blade 106 is usually set to about 0.1 to 0.5 mm.
mm, the gap S2 on the opening side of the C-shaped frame 101 is as large as 2 to 5 mm. Therefore, the sharpness deteriorates, the shearing surface of the material to be sheared becomes droopy, and the recutting is required, so that the yield is poor.When the material to be sheared is thin, it is caught in the gap between the upper blade and the lower blade. On the other hand, there is no pillar on either side of the width direction of the upper blade and the lower blade, so the remaining part can be discharged in the horizontal direction as it is, and the time required for discharging the remaining part can be shortened. There are advantages. In other words, it is most preferable that the cold shearing machine has the advantages of both cold shearing machines.

Of course, if the rigidity of the support frame and the upper frame of the C-shaped frame 101 is improved, the difference in the gap between the lower blade and the upper blade can be reduced, so that it is effective in improving the shear surface of the material to be sheared. However, this is not preferable because the cantilever type cold shearing machine becomes large in size and economically disadvantageous.

[0007] Accordingly, the present invention provides a dual-support cold-roll by suppressing the torsion of the upper frame due to the reaction force at the time of shearing of the material to be sheared, even if the rigidity of the upper blade support frame is the same as the conventional one. An object of the present invention is to provide a cantilever type cold shearing machine having the same sharpness as a shearing machine.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is therefore characterized by the means employed by the cantilevered cold shearing machine according to claim 1 of the present invention. A slide frame is provided on the upper frame of the C-shaped frame so as to be vertically movable, an upper blade is provided on the lower side of the slide frame, and the upper blade is provided on the upper side of the lower tool rest on the lower part of the C-shaped frame. In a cantilever type cold shearing machine provided with an opposing lower blade, an arm protrudes from an opening side of a C-shaped frame of the slide frame, and an output side of a sheared material after the lower turret is sheared. In addition, a support frame that receives a horizontal acting force from the arm is erected on the opening side of the C-shaped frame.

The feature of the means adopted by the cantilever type cold shearing machine according to the second aspect of the present invention is that the first aspect of the invention is characterized in that:
Wherein the liner is interposed between the arm and the support frame.

The feature of the means employed by the cantilevered cold shearing machine according to claim 3 of the present invention is that the method is characterized by claim 1.
In the cantilever type cold shearing machine, a wedge having a thinner upper side is fixed to a side of the support frame facing the liner and a thicker lower side is fixed to the side facing the liner. It has a tapered surface that touches,
An adjustment wedge, on which the liner slides, is supported on the opposite vertical surface by a wedge elevating mechanism provided on the support frame so as to be vertically movable.

[0011]

According to the cantilever type cold shearing machine according to the first aspect of the present invention, the horizontal acting force from the arm protruding from the slide frame supporting the upper blade causes the lower blade supporting the lower blade. Because the support frame is supported by the support frame erected on the outgoing side of the sheared material, only the vertical acting force generated when the sheared material is sheared is transmitted to the upper frame via the upper blade and the slide frame. You. On the other hand, in this cantilever type cold shearing machine, there is no obstacle corresponding to the support frame of the doubly-supported type cold shearing machine on the working side on the input side of the material to be sheared. Similarly, the remainder of the material to be sheared can be discharged from the opening side of the C-shaped frame.

According to the cantilever type cold shearing machine according to the second aspect of the present invention, the horizontal acting force from the arm protruding from the slide frame supporting the upper blade applies the lower blade to the lower blade via the liner. It is held by a support frame erected on the side of the lower turret to support the material to be sheared.

According to the cantilever type cold shearing machine according to the third aspect of the present invention, the horizontal acting force from the arm protruding from the slide frame supporting the upper blade causes the wedge and the adjusting wedge to move. The lower turret that supports the lower blade through the support member is supported by a support frame that is erected on the outlet side of the material to be sheared. Even if the liner is worn by repeated vertical movements of the slide frame, the adjustment wedge can be moved downward by the wedge elevating mechanism to adjust the distance between the support frame and the arm, so that it can be used for a long time. The gap between the blade and the lower blade can be maintained normally.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cantilever type cold shearing machine according to an embodiment of the present invention will be described with reference to FIG. 1 as an overall side view and FIG.
FIG. 3A of an enlarged view of a portion B in FIG. 1 and C in FIG.
This will be described with reference to FIG.

Reference numeral 1 shown in FIGS. 1 and 2 denotes a single C-shaped frame installed on the work floor. Inside the upper frame 1b of the C-shaped frame 1, there are shown in FIGS. 3 (a) and 3 (b). As shown, a slide frame 2 having an upper blade 3 on the lower side and an arm 2a to which a liner 2b is fixed protruding from an outlet side of the sheared material is vertically movably fitted. I have. The slide frame 2 is provided with a crank pin 2c. The crank pin 2c is connected to the crank shaft 4 having an eccentric shaft 4a provided above the crank pin 2c by a connecting rod 5. That is, the slide frame 2 is moved up and down via the connecting rod 5 by the rotation of the crankshaft 4.

As shown in FIGS. 1 to 3, a lower tool rest 1c having a lower blade 6 on the lower side facing the upper blade 3 is provided below the slide frame 2. On the opening side of the C-shaped frame 1 of the lower tool rest 1c and on the exit side of the sheared material, the arm 2a
A support frame 7 is fixedly provided with a liner 7a to which a liner 2b provided is fixedly attached. Since the plane of the arm 2a only needs to be smooth and the vertical surface of the support frame 7 only needs to be smooth, it is not always necessary to provide the liners 2a and 7a. However, the provision of these liners 2a and 7a prevents wear of the arm 2a and the support frame 7 itself, and is effective in reducing the running cost required for replacing or repairing the arm 2a and the support frame 7.

On the C-shaped frame 1, there is provided a driving device 8, which will be described later, for rotating a crankshaft 4 for raising and lowering the upper blade 3 via a slide frame 2. As shown in FIGS. 1 and 2, the driving device 8 is provided with a motor 9 provided on the upper frame 1 b and a motor 9 provided on the support frame 1 a of the C-shaped frame 1. Reduction gear 1 that reduces the number of revolutions at a predetermined reduction ratio
0 and a power transmission mechanism 11 having a gear train (not shown) for transmitting the rotation of the output shaft of the reduction gear transmission 10 to the crankshaft 4.

The mode of operation of the cantilever type cold shearing machine having the above configuration will be described below.
0, when transmitted to the crankshaft 4 via the power transmission mechanism 11, the crankshaft 4 rotates, and the slide frame 2 is moved up and down via the connecting rod 5. Then, while the upper blade 3 descends below the cutting edge of the lower blade 6,
Since the upper blade 3 rises from the lowermost position, the sheared material inserted between the upper blade 3 and the lower blade 6 is sheared.

The reaction force generated when the sheared material is sheared is C
In this case, the horizontal component of the reaction force is transmitted to and supported by the support frame 7 via the slide frame 2, the arm 2a, the liner 2b, and the liner 7a. Only the vertical component of the reaction force is transmitted to the upper frame 1b of the C-shaped frame 1 via the slide frame 2. Therefore, unlike the conventional cantilever type cold shearing machine, there is no need to cover the horizontal component of the reaction force with the upper frame 1b.
Is prevented from being twisted and the longitudinal gap between the upper blade 3 and the lower blade 6 is always kept constant as in the case of the conventional double-supported cold shearing machine. However, an excellent shear material can be obtained. Therefore, the same yield rate as that of a conventional double-supported cold shearing machine can be secured, and a thin material to be sheared that cannot be sheared by being sandwiched by a conventional cantilevered cold shearing machine. But it can be surely sheared.

Further, in this cantilever type cold shearing machine, a support frame 7 is provided upright on the outlet side of the material to be sheared. Since there is no obstacle corresponding to the support frame of the machine and it is open, the rest of the material to be sheared is not pulled out to the entry side of the material to be sheared as in the conventional cantilever type cold shearing machine. Can be discharged laterally.

FIG. 4 is a schematic structural explanatory view showing a main part of a cantilever type cold shearing machine according to another embodiment of the present invention.
The same reference numerals are used to refer to the same parts as in the above embodiment, and only the differences from the above embodiment will be described below. Reference numeral 2 shown in the figure denotes a slide frame having an upper blade 3 on a lower side. As in the above embodiment, an arm (not shown) having a liner 2b is provided on the slide frame 2 on the exit side of the material to be sheared after shearing.

A wedge 12 having a thin upper side and a thicker lower side is fixed to a side of the support frame 7 erected from the side of the material to be sheared after the shearing, opposite to the liner 2b. On the side opposite to the liner 2b, there is a tapered surface 13a slidably in contact with the tapered surface 12a of the wedge 12, and an adjusting wedge 13 in which the liner 2b slidably contacts the opposite vertical surface is provided on the top of the support frame 7. It is vertically movably supported by a provided wedge elevating mechanism 14 described later.

The construction of the wedge elevating mechanism 14 is such that a U-shaped metal member 14a and an upper horizontal member of the U-shaped metal member 14a are penetrated, and a lower end thereof is rotatably connected by a lower horizontal member. Screw rod 1 screwed into a female screw threaded on horizontal projecting member 13b above adjustment wedge 13
4b, and a round handle 14c fitted to a protruding end of the screw bar 14b protruding above the upper horizontal member of the U-shaped bracket 14a. The round handle 14c is adjusted by rotating the round handle 14c forward and reverse. In this configuration, the wedge 13 is moved up and down.

Therefore, the mode of operation of the cantilever type cold shearing machine constructed as described above will be described. The horizontal component of the reaction force generated when the material to be sheared is sheared is transmitted to the adjusting wedge 13 via the arm and the liner 2b. Since the horizontal component of the transmitted reaction force is supported by the support frame 7 via the wedge 12, the horizontal component of the reaction force is
Is transmitted to the upper frame 1b through the slide frame 2 and only the vertical component of the reaction force is transmitted to the slide frame 2,
This embodiment is the same as the above embodiment. However, in the case of this embodiment, the wear of the liner 2b can be absorbed very easily by the vertical movement of the adjusting wedge 13 by the wedge elevating mechanism 14, so that the sheared material can be stably sheared for a longer time. This is superior to the above embodiment in this point.

[0025]

As described above in detail, according to the cantilever type cold shearing machine according to the first, second or third aspect of the present invention, the horizontal component of the reaction force generated when the sheared material is sheared is transmitted from the arm. Since it is transmitted to the support frame and supported by this support frame, only the vertical component of the reaction force is transmitted to the upper frame and this upper frame does not twist,
The gap in the longitudinal direction between the upper blade and the lower blade is kept constant. Therefore, the same sharpness as that of the conventional double-supported cold shearing machine can be obtained, and the material to be sheared can be sheared with the same yield as that of the double-supported cold shearing machine. Since there is no obstacle on the side, there is an extremely excellent effect that the time required for discharging the remaining material to be sheared is the same as that of the conventional cantilever type cold shearing machine.

[Brief description of the drawings]

FIG. 1 is an overall side view of a cantilever type cold shearing machine according to an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

3 (a) is an enlarged view of a portion B in FIG. 1, and FIG. 3 (b) is a view as viewed in the direction of arrow C in FIG. 3 (a).

FIG. 4 is a schematic structural explanatory view showing a main part of a cantilever type cold shearing machine according to another embodiment of the present invention.

FIG. 5 (a) is an explanatory view of the acting force when shearing a material to be sheared by a conventional cantilever type cold shearing machine, and FIG. 5 (b) is a diagram showing the conventional cantilever type cold shearing machine. FIG. 4 is an explanatory view of a gap between an upper blade and a lower blade during shearing of a material to be sheared.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... C type frame, 1a ... Support frame, 1b ... Upper frame, 1c ... Lower turret 2 ... Slide frame, 2a ... Arm, 2b ... Liner, 2c ... Crank pin 3 ... Upper blade 4 ... Crankshaft, 4a ... Eccentricity Shaft part 5 ... Connecting rod 6 ... Lower blade 7 ... Support frame, 7a ... Liner 8 ... Drive device 9 ... Motor 10 ... Reduction gear 11 ... Power transmission mechanism 12 ... Wedge, 12a ... Tapered surface 13 ... Adjustment wedge, 13a ... Tapered surface, 13b Horizontally projecting member 14 Wedge elevating mechanism, 14a U-shaped bracket, 14
b: Screw rod, 14c: Round handle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-269516 (JP, A) JP-A-5-280203 (JP, A) Fully open sho 59-5227 (JP, U) Really open sho 58- 75624 (JP, U) Japanese Utility Model Showa 57-100425 (JP, U) Japanese Patent Publication No. 1-36886 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23D 15/00-15 /14

Claims (3)

(57) [Claims] 1. A slide frame is provided on an upper frame of a C-shaped frame so as to be vertically movable, an upper blade is provided on a lower side of the slide frame, and the slide frame is provided on an upper side of a lower tool rest on a lower portion of the C-shaped frame. In a cantilever type cold shearing machine provided with a lower blade opposed to an upper blade, an arm is protruded from an opening side of a C-shaped frame of the slide frame, and a material to be sheared after the lower turret is sheared. Outgoing and C
A cantilever type cold shearing machine, wherein a support frame which receives a horizontal acting force from the arm is erected on an opening side of a mold frame. 2. The cantilever type cold shearing machine according to claim 1, wherein a liner is interposed between the arm and the support frame. 3. A wedge that is thinner on the upper side and thicker on the lower side is fixed to a side of the support frame facing the liner,
The wedge raising and lowering mechanism has a tapered surface on the side facing the liner of the wedge that slides on the surface of the wedge, and an adjustment wedge on the support frame, on which the liner slides on the opposite vertical surface. The cantilever type cold shearing machine according to claim 1, wherein the cantilever is supported freely.