JPH08126908A - Cantilever type cold shearing machine - Google Patents

Abstract

PURPOSE: To provide the cutting property to a cantilever type cold shearing machine equivalent to that of a center type cold shearing machine. CONSTITUTION: An arm is projected on a slide frame 2 having an upper blade 3 which is supported on an upper frame 1b in a vertically movable manner, a support frame 7 is erected on the outlet side of a work to be sheared of a lower tool rest 1c to support a lower blade 6, and a liner provided on the arm is brought into slidable contact with a liner 7a provided on the support frame 7. Because the horizontal component of the reaction to be generated in shearing the work to be sheared is supported on the support frame 7, and only the perpendicular component of the reaction is transmitted to the upper frame 1b, this upper frame 1b is not twisted, and the clearance in the longitudinal direction between the upper blade 3 and the lower blade 6 is kept constant, and the cutting property equivalent to that of a center type cold shearing machine can be obtained with a cantilever type cold shearing machine.

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 cantilever type cold shearing machine for cold-shearing a material to be sheared, and more particularly to a cantilevering type cold shearing machine. The present invention relates to a cantilever type cold shearing machine having a sharpness equivalent to that of a double-sided cold shearing machine.

[0002]

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

[0003]

The above-mentioned 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 are used properly according to the purpose. ing. For example, in the former double-supported cold shearing machine, the sheared surface of the material to be sheared is clean and there is an advantage that the re-cutting process of the end part is unnecessary and the yield is good, while the width direction of the upper blade and the lower blade is Since there are strut frames on both sides, the rear end remaining part of the material to be sheared cannot be removed as it is in the lateral direction (the width direction of the blade), and the remaining part of the material to be sheared must be pulled out to the inlet side and then discharged. However, there is a drawback that the time required for discharging the remaining portion becomes long.

On the other hand, in the latter cantilever type cold shearing machine, as shown in FIG. 5 (a) which is an explanatory view of the acting force at the time of shearing the material to be sheared, when the material W to be sheared is sheared, An obliquely upward reaction force P acts on the blade edge of 103. Here, when the angle formed by this reaction force P and the vertical line is α, the reaction force P is Pcos α
Vertical component Fv of the
It is divided into the horizontal component Fh of α. The reaction force P is received by the C-shaped frame, but due to the horizontal component Fh, the column frame of the C-shaped frame tilts toward the outlet side of the material to be sheared, and the upper frame is twisted, so that the shearing force is generated during shearing. As shown in FIG. 5 (b) of the gap explanatory diagram between the upper blade and the lower blade in, the gap S1 on the support frame 101a side of the C-shaped frame 101 between the upper blade 103 and the lower blade 106 is
The gap S2 on the opening side of the C-shaped frame 101 becomes large.

The initial gap between the upper blade 103 and the lower blade 106 is usually set to about 0.1 to 0.5 mm. For example, the blade width between the upper blade 103 and the lower blade 106 is 1000.
In the case of mm, the clearance S2 on the opening side of the C-shaped frame 101 becomes 2 to 5 mm. Therefore, the sharpness deteriorates, the sheared surface of the material to be sheared, and the re-cutting requires re-cutting, resulting in poor yield, and when the material to be sheared is thin, it is sandwiched between the upper and lower blades. While there is a drawback that it can not be sheared due to the fact that there is no pillar on one side of the upper blade and the lower blade in the width direction, the remaining part can be discharged laterally as it is, and the remaining part discharge time is short. There are advantages. In other words, it is most preferable that the cold shears have the advantages of both cold shears.

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, which is effective in improving the shearing surface of the material to be sheared. However, this is not preferable because the cantilever type cold shearing machine becomes large and economically disadvantageous.

Therefore, according to the present invention, even if the rigidity of the upper blade supporting frame is equal to that of the conventional one, by suppressing the twisting of the upper frame due to the reaction force at the time of shearing the material to be sheared, the double-supported cold type is supported. An object 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 means adopted by the cantilever type cold shearing machine according to claim 1 of the present invention. The slide frame is provided on the upper frame of the C-shaped frame so as to be vertically movable, the 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 of the C-shaped frame. In a cantilever type cold shearing machine provided with opposing lower blades, an arm is projectingly provided on the opening side of the C-shaped frame of the slide frame, and at the exit side of the material to be sheared after shearing of the lower tool rest. 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 means adopted by the cantilever type cold shearing machine according to claim 2 of the present invention is characterized by:
In the cantilever type cold shearing machine described in (3) above, a liner is interposed between the arm and the support frame.

The means adopted by the cantilever type cold shearing machine according to claim 3 of the present invention is characterized by:
In the cantilevered cold shearing machine described in (1), a wedge whose upper side is thin and whose lower side is thick is fixed to the side of the support frame facing the liner, and the wedge is slid on the side of the wedge facing the liner. It has a tapered surface that touches,
An adjusting wedge, with which the liner is in sliding contact with a vertical surface on the opposite side, is supported by a wedge lifting 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 supports the lower blade. Since it is supported by the support frame that stands upright on the outlet side of the material to be sheared of the table, only the vertical acting force generated when the material to be sheared is transmitted to the upper frame via the upper blade and slide frame. It On the other hand, in this cantilever type cold shearing machine, there is no obstacle corresponding to the strut frame of the double-sided cold shearing machine on the working side of the entry side of the material to be sheared. Similarly, the remaining portion 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 of the second aspect of the present invention, the horizontal acting force from the arm projecting on the slide frame supporting the upper blade moves the lower blade via the liner. It is supported by a support frame that is erected on the outlet side of the material to be sheared of the supporting lower tool rest.

According to the cantilever type cold shearing machine of the third aspect of the present invention, the acting force in the horizontal direction from the arm projecting on the slide frame supporting the upper blade causes the wedge and the adjusting wedge to move. It is supported by a support frame that is erected on the outlet side of the material to be sheared of the lower tool rest that supports the lower blade. Even if the liner wears due to repeated up and down movements of the slide frame, the adjustment wedge can be moved downward by the wedge lifting mechanism to adjust the distance between the support frame and the arm. The gap between the blade and the lower blade can be maintained normally.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A cantilever type cold shearing machine according to an embodiment of the present invention will now be described with reference to FIG.
And FIG. 3 (a) which is an enlarged view of part B in FIG. 1 and C in FIG. 3 (a).
Description will be given with reference to FIG.

Reference numeral 1 shown in FIGS. 1 and 2 designates a single C-shaped frame installed on the work floor. Inside the upper frame 1b of the C-shaped frame 1, as 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 fixedly attached is projectingly provided on the outgoing side of the material to be sheared, is vertically movably fitted. There is. A crank pin 2c is provided on the slide frame 2, and the crank pin 2c and a crank shaft 4 having an eccentric shaft portion 4a provided above the crank pin 2c are connected by a connecting rod 5. That is, the slide frame 2 is vertically moved by the rotation of the crankshaft 4 via the connecting rod 5.

A lower tool rest 1c having a lower blade 6 on the lower side facing the upper blade 3 is provided at a lower position of the slide frame 2 as shown in FIGS. The arm 2a is provided 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 to be sheared.
A support frame 7 is fixedly provided to which a liner 7a, which is in sliding contact with the liner 2b provided at, is fixed. Since the plane of the arm 2a may be smooth and the vertical surface of the support frame 7 may be smooth, it is not always necessary to provide the liners 2a and 7a. However, by providing the liners 2a and 7a, the wear of the arm 2a and the support frame 7 itself is prevented, which is effective in reducing the running cost required for replacement or repair of the arm 2a and the support frame 7.

On the C-shaped frame 1, there is provided a driving device 8 having a structure which will be described later, which rotates a crankshaft 4 for moving the upper blade 3 up and down via a slide frame 2. As shown in FIGS. 1 and 2, the driving device 8 is provided on a motor 9 arranged on the upper frame 1 b and on a support frame 1 a of the C-shaped frame 1, and Reduction gear 1 for reducing the rotation speed at a predetermined reduction ratio
0, and a power transmission mechanism 11 having a gear train (not shown) that transmits the rotation of the output shaft of the reduction gear transmission 10 to the crankshaft 4.

The operation of the cantilever type cold shearing machine having the above construction will be described below.
0, when the power is 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, the upper blade 3 descends below the blade edge of the lower blade 6,
Since it rises from the lowest position, the material to be sheared between the upper blade 3 and the lower blade 6 is sheared.

The reaction force generated when the material to be sheared 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, it is not necessary for the upper frame 1b to bear the horizontal component force of the reaction force.
Is not 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. It is possible to obtain an excellent shearing material. Therefore, it is possible to secure a yield rate similar to that of a conventional double-supported cold shearing machine, 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, the support frame 7 is erected on the outlet side of the material to be sheared, but the working side of the inlet side of the material to be sheared is a double-sided cold shearing machine. Since there is no obstacle corresponding to the column frame of the machine, it is open, so like the conventional cantilever type cold shearing machine, the remaining part of the material to be sheared is not pulled out to the inlet side of the material to be sheared It can be discharged laterally.

Next, a cantilever type cold shearing machine according to another embodiment of the present invention is shown in FIG.
Reference will be made to the same parts as those of the above embodiment with the same reference numerals, and only the points different from the above embodiment will be described below. Reference numeral 2 shown in the figure is a slide frame having an upper blade 3 on the lower side, Similar to the above-described embodiment, the slide frame 2 is provided with an arm (not shown) having a liner 2b on the outgoing side of the material to be sheared after shearing.

Then, a wedge 12 having a thin upper side and a thick lower side is fixed to the side of the support frame 7 standing upright on the outgoing side of the material to be sheared after the shearing, which is opposed to the liner 2b. On the top of the support frame 7, there is an adjusting wedge 13 on the side opposite to the liner 2b, which is in sliding contact with the tapered surface 12a of the wedge 12, and on the opposite vertical surface, which is in sliding contact with the liner 2b. It is supported so as to be vertically movable by a wedge lifting mechanism 14 which will be described later.

The wedge raising / lowering mechanism 14 has a structure in which a U-shaped metal fitting 14a and an upper horizontal member of the U-shaped metal fitting 14a are penetrated and a lower end thereof is rotatably connected by a lower horizontal member. A threaded rod 1 screwed into a female screw threaded on a horizontal projecting member 13b above the adjusting wedge 13.
4b and a round handle 14c fitted to the projecting end of the U-shaped metal fitting 14a of the screw rod 14b projecting upward from the upper horizontal member, and is adjusted by rotating the round handle 14c forward and backward. This is a configuration in which the working wedge 13 is moved up and down.

Therefore, the operation mode of the cantilever type cold shearing machine having the above construction 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 reaction force transmitted and supported is supported by the support frame 7 via the wedge 12, the horizontal component of the reaction force is supported by the slide frame 2.
Since it is not transmitted to the upper frame 1b through the slide frame 2 but only the vertical component of the reaction force is transmitted to the slide frame 2,
This embodiment has the same effect as the above embodiment. However, in the case of the present embodiment, it is possible to absorb the wear of the liner 2b very easily by vertically moving the adjusting wedge 13 by the wedge lifting mechanism 14, so that the material to be sheared can be stably sheared for a longer time. This is advantageous over the above-described embodiments in this respect.

[0025]

As described in detail above, 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 material to be sheared is sheared 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 longitudinal gap between the upper blade and the lower blade is kept constant. Therefore, the same sharpness as the conventional double-supported cold shearing machine can be obtained, the material to be sheared can be sheared at the same yield as the double-supported cold shearing machine, and the work on the entry side of the sheared material can be performed. Since there is no obstacle on the side, there is an extremely excellent effect that the time required for discharging the remaining portion of the material to be sheared is the same as in the conventional cantilever type cold shearing machine.

[Brief description of 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 on arrow A in FIG.

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

FIG. 4 is a schematic configuration 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 action force when the material to be sheared is sheared by a conventional cantilever type cold shearing machine, and FIG. 5 (b) is a conventional cantilever type cold shearing machine. It is a clearance gap explanatory view between an upper blade and a lower blade at the time of shearing of a material to be sheared.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... C-type frame, 1a ... Strut frame, 1b ... Upper frame, 1c ... Lower tool rest 2 ... Slide frame, 2a ... Arm, 2b ... Liner, 2c ... Crank pin 3 ... Upper blade 4 ... Crank shaft, 4a ... Eccentricity Shaft 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 ... Horizontal protruding member 14 ... Wedge lifting mechanism, 14a ... U-shaped metal fitting, 14
b ... screw rod, 14c ... round handle

Claims (3)

[Claims] 1. A slide frame is provided on an upper frame of the C-shaped frame so as to be vertically movable, an upper blade is provided on a lower side of the slide frame, and the upper frame is provided on an upper side of a lower tool rest of the C-shaped frame. In a cantilever type cold shearing machine provided with a lower blade facing the upper blade, an arm is projectingly provided on an opening side of a C-shaped frame of the slide frame, and a material to be sheared after the lower tool rest is sheared. Outgoing side and C
A cantilever type cold shearing machine, wherein a support frame receiving a horizontal acting force from the arm is erected on the opening side of the mold frame. 2. The cantilever type cold shearing machine according to claim 1, further comprising a liner interposed between the arm and the support frame. 3. A wedge having a thin upper side and a thick lower side is fixed to a side of the support frame facing the liner,
The wedge raising / lowering mechanism provided on the support frame vertically moves a wedge having a taper surface on the side of the wedge facing the liner and in sliding contact with the surface of the wedge, and a vertical slide on the opposite side for sliding contact of the liner. The cantilevered cold shearing machine according to claim 1, which is supported freely.