JP2652925B2 - Hydraulic puncher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic puncher capable of efficiently drilling a bolt hole at an arbitrary intermediate position of a long member of a flat or lightweight type steel for a structure (angle steel, grooved steel, etc.). It is.

[0002]

2. Description of the Related Art As is well known, in order to efficiently drill a hole at an arbitrary intermediate position of a long material, the work is performed by fixing the long material and moving a light hydraulic puncher. Alternatively, the hydraulic puncher is placed and fixed according to the dimensions, and the workpiece is inserted and removed and moved. This conventional hydraulic puncher requires the main frame 1 'to be lightweight.
Has a hook shape to reduce the safety factor and maximize the allowable stress. Therefore, the jaw opening becomes large, and it is unavoidable to prevent the angular deviation between the central axes of the punch 14 'and the die 15'. % (Figure 4)
reference). Therefore, the holes that were drilled were Bali, Kaeri, Darre,
The warpage is large, and the life of the punch 14 'is short.
Note that the distortion of the hook-shaped main frame 1 ′ has a limit in reducing the weight of the main frame 1 ′ itself because the acting stress is set to the maximum allowable in practical use. Therefore, as a hydraulic drive source for further weight reduction, by using an ultra-high pressure 63 MPa unit which is not widely used in the general industrial machine industry, and therefore high maintenance parts are difficult to obtain and which cannot be said to be economical pressure, To help reduce the size and weight.

[0003]

Because of the efficient drilling work at an arbitrary intermediate position of the long material, the puncher cannot employ a desirable laterally-supported pillar shape with accuracy, and the hook-shaped main frame 1 is not suitable. 'Must be used. However, the metal deforms under the control of the elastic modulus in proportion to the acting stress. Therefore,
In a puncher which must take high stress to reduce the weight, the opening angle of the jaw is large, and the misalignment of the axis of the punch 14 ′ and the die 15 ′ under load is about millimeters in a large machine. It occurs greatly. Therefore, the conventional hydraulic puncher has the following problems. Regarding the hole accuracy: In the case of the horizontal support type parallel pressing, the relationship between the punching punch diameter: d, the die hole diameter: D, and the plate thickness of the workpiece: t is generally D ≒ d + 0. .1t. In a hydraulic puncher with a hook-shaped frame, the inclination of the punch and the die on the axis is large.
d + 0.2 to 0.3t. Therefore, the burr of the machined hole,
The burrs and sagging are large, and in some cases, distortion of the entire long material occurs. Regarding punch damage; at the end of drilling, that is, at the time of inflection from the maximum load to zero load, the punch bites into the workpiece for a fraction of its plate thickness with no gap . Therefore, at the moment when the load is reduced from the maximum to the minimum (zero), the axial misalignment between the punch and the die also tries to return instantaneously. Works. This causes breakage of the punch.
Frequent punch breakage hinders productivity and the labor and cost of replacing it is costly. Regarding weight reduction; The method of using a hydraulic puncher is to fix a long material and move the puncher. And
Even if the movement and the set of the puncher do not depend on human power, it is necessary to reduce the weight of the puncher. Therefore, if the weight is reduced by using a high-tensile material with twice the allowable stress,
As long as the elastic modulus is not different, the bending angle is also about twice. Therefore, the hole accuracy and punch life described above are further deteriorated, and there is a practical limit to weight reduction. Regarding simplification of maintenance; Economic pressure of hydraulics based on marketability by industry is approximately 3.5 to 14MP for machine tools.
a, 14 ~ 31.5MPa with forging machine, 56 ~ with aircraft
70 MPa. Therefore, for general industrial machinery,
65MPa pumps, valves, piping members, rubber hoses,
Maintenance parts for packings are expensive and sometimes difficult to obtain, so they are not frequently used. However, in the hydraulic puncher, since there is a limit in reducing the weight of the main frame, the weight of the hydraulic cylinder has also been reduced, and an ultra-high pressure 65 Mpa unit is frequently used. The present invention has been proposed in view of the above, and has good hole accuracy, small burrs, burrs, sagging, etc., can prevent the occurrence of distortion of a long material, can prevent punch breakage, and is lightweight. It is an object of the present invention to provide a hydraulic puncher that can realize realization, can use inexpensive and easily available maintenance parts for general industry, and can also reduce the weight of a hydraulic cylinder.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a hydraulic puncher having a hook-shaped main frame having a cylinder support portion and a die mounting portion, wherein a central portion of upper and lower projecting jaws of the main frame is provided. A cylinder provided with a cut slit for leaving one side of the tip side of the protruding jaw and separating both sides thereof and a root portion of the jaw on the main body side, and the cut slit insulated from the main body side to give a degree of freedom. The support part and the die mounting part are formed on the upper and lower protruding jaws, and the cylinder support part and the die mounting part are supported only at the tip side of the protruding jaw, so that the cylinder supporting part and the die mounting part, the main frame body, , Causing the bending in the opposite direction to cancel the bending angle.

[0005]

According to the present invention having the above structure, the direction of the moment generated by the pressurization of the cylinder is reversed between the main body of the hook-shaped main frame, the cylinder support, and the die mounting portion. Therefore, the deflection angle acts in the canceling direction. By matching the rigidity of the main body, the cylinder support, and the die attachment to the magnitude of the moment, the bending angle can be almost cancelled, and the vertical pressure can be constantly applied in the entire output range. Even if the amount of flexure increases, vertical pressurization is always performed in the entire pressurization region as long as it can withstand the strength. Therefore, the weight can be easily reduced by employing high-tensile steel or the like. In addition, by providing a pressure intensifier having an area ratio of about 3: 1 on the upper part of the cylinder tube part in accordance with the entire width of the hook-shaped main frame, for example, 21 MPa
65M compact by using the pump unit for
It is also possible to use a Pa cylinder. in this case,
The only consumables for 65MPa are the sealing parts, which facilitates maintenance.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a hydraulic puncher according to the present invention; FIG. 1 is a sectional view of a hydraulic puncher according to the present invention; FIG. This is an embodiment in which one intensifier is mounted. That is, in FIG. 1, the left half is a cross-sectional view of the cylinder at the upper limit, and the right half is a cross-sectional view of the cylinder at the lower limit. The cross-sectional view shown in FIG. 2 is a cross-sectional view taken along the line AA and the line BB of FIG. 1, wherein the line AA shows the cylinder support portion of the upper jaw, and the line BB shows the die mounting portion of the lower jaw. Is shown. FIG. 3 is a front view of the hydraulic puncher according to the present invention.

[0007] The structure of the main frame 1 is an integral hook shape, and the width of the upper and lower protruding jaws is not narrowed, but a hook-shaped frame that is almost the same as or slightly wider than the width of the abdomen. A cylinder supporting portion 2 which forms a cylinder and serves as a punch guide portion, and a die mounting portion 3 for mounting a die are located at the center of the jaw projecting from the main body. That is, a cylinder supporting portion 2 (or a punch guide portion) also serving as an outer cylinder portion of the cylinder is provided at a central portion of the upper jaw portion, and a die mounting portion 3 (a die mounting hole) and a scrap discharge hole are provided at a central portion of the lower jaw portion. 16 are provided. For the above center hole processing, the left and right rib widths of the remaining jaw are both left and right, leaving one side of the tip side of the jaw, the rib width is divided into two from the center, and the center of the jaw and the body side Are separated into, for example, a U-shape connected by an arc.

As shown in FIG. 2, the cylinder supporting portion 2 and the die mounting portion 3 are separated from the main body side by a U-shaped cut slit 4 of an upper jaw and a U-shaped cut slit 5 of a lower jaw. The degree of freedom is given, and it is supported only at the tip of the upper and lower protruding jaws. Therefore, the deflection under load is the moment M1: M3, M shown in FIG.
2: Clearly reversed, as in M4.

In order to offset the bending angle in the opposite direction up and down, the rigidity of the cross-section of the cylinder support portion 2 and the die mounting portion 3 may be appropriately selected. Therefore, in an actual design, as shown in FIG. 2, l <L, and a case where the difference between l and L is too large with only the difference in rigidity can be predicted. In this case, by providing the bending angle adjusting groove 11 shown in FIG. 2, not only bending of the protruding ribs but also distortion of the strain-deformable cylinder-side support plate 12 and the strain-deformable die-side support plate 13 are added. This allows easy adjustment.

In the drawing, reference numeral 1 denotes a hook-shaped main frame as described above. A punching cylinder and a punch 14 are mounted on the protruding upper jaw, and a die 15 is mounted on the lower jaw. Reference numeral 2 denotes a cylinder support at the center of the upper jaw,
Reference numeral 3 denotes a die mounting portion at the center of the lower jaw, and 4 denotes a U at the upper jaw.
The U-shaped cut slits 5 and 5 are U-shaped cut slits in the lower jaw. The cylinder support portion 2 and the die mounting portion 3 are completely separated from the main body side of the hook-shaped main frame 1 by the slits 4 and 5. As a result, the jaw opening direction of the hook-shaped main frame 1 due to the punching load and the bending angle direction of the central portion of the protruding jaws of the cylinder support portion 2 and the die attaching portion 3 become completely opposite to each other, and can be canceled.

That is, since only the tip end of the protruding jaw is supported, the deflection under load is completely reversed in the direction of M1: M3 and M2: M4 shown in FIG. .

The conditions for canceling the bending are determined by selecting the rigidity and the shape and dimensions of each part and selecting the shape of the bending angle adjusting groove 11 shown in FIG. In the drawing, 6 is a cylinder for economic pressure of 21 MPa, for example, 7 is a piston for economic pressure, and 8 is a cylinder fitting. Then, the economic pressure cylinder 6, the economic pressure piston 7, the cylinder fitting 8
To generate a super-high pressure in the super-high pressure chamber 9.

An ultra-high pressure ram / punch holder 10 is formed in the cylinder support 2 at, for example, 21 MPa. A punch 14 is provided in the punch holder 10.
Is mounted, and a die 15 is mounted on the die mounting portion 3. Further, the die mounting portion 3 has a discharge hole 16
Communication.

[0014]

As described above, according to the present invention,
In the hydraulic puncher used for drilling of structural steel, vertical machining becomes possible, which enables appropriate punching with punches and dies with the same gap as the horizontal support type press, and the accuracy of the punched hole Is further improved. In addition, since the impact lateral load on the punch due to the return of the bending due to the instantaneous release of the load at the end of the punching is reduced, frequent breakage of the punch is prevented, and the cost is reduced. Further, since the bending itself is made harmless and vertical pressure is applied, it is possible to easily reduce the weight and the size by using ultra-high tensile steel or special steel. By making the upper jaw center only an ultra-high pressure cylinder and providing a pressure boosting cylinder at the top,
General economic pressure with high cost performance on conservation,
For example, it can be easily driven by a unit for 21 MPa.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a hydraulic puncher, in which a left half shows an upper limit view of a cylinder and a right half shows a lower limit view of a cylinder.

FIG. 2 is a cross-sectional plan view of the hydraulic puncher, and FIG.
2A shows a cross section taken along line A and FIG.

FIG. 3 is a front external view of a hydraulic puncher.

FIG. 4 is a reference diagram of a punching operation state using a conventional hydraulic puncher.

[Description of Signs] 1 Hook-shaped main frame 2 Cylinder support 3 Die mounting part 4 U-shaped cut slit in upper jaw 5 U-shaped cut slit in lower jaw 6 Economic pressure cylinder 7 Economic pressure piston 8 Cylinder fitting 9 Ultra-high pressure booster chamber 10 Ultra-high pressure ram / punch holder 11 Flexure angle adjusting groove 12 Cylinder side support plate 13 Die side support plate 14 Punch 15 Die die 16 Die discharge hole

Claims (3)

(57) [Claims] 1. A hydraulic puncher comprising a hook-shaped main frame having a cylinder support portion and a die mounting portion, wherein one side of the tip side of the protruding jaw is left at a central portion of upper and lower protruding jaws of the main frame. Cut slits are provided to separate the both sides and the base of the jaw on the main body side. A cylinder support part and a die mounting part are provided on the upper and lower protruding jaws, each of which is insulated from the main body side by the cut slit and is given flexibility. By supporting the cylinder support portion and the die mounting portion only at the tip end of the protruding jaw, the cylinder support portion and the die mounting portion and the main frame main body are bent in opposite directions to offset the bending angle. A hydraulic puncher characterized by being measured. 2. The hydraulic puncher according to claim 1, wherein the main frame is formed using high-tensile steel or special steel. 3. The hydraulic puncher according to claim 1, wherein a central portion of the protruding upper jaw portion is an ultra-high pressure cylinder, and a booster cylinder is mounted on an upper portion thereof.