JP2006116571A - Method for manufacturing metal tool for clamping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an epoch-making metal tool for clamping, by which the metal tool (metal tool body) for clamping having high strength can easily be manufactured at a low cost by utilizing the existing working facility without using roll-rolling. <P>SOLUTION: In the method for manufacturing the metal tool for clamping constituted so that a fixing means 2 is arranged in the metal tool body 1 having almost U-shape and this metal tool body 1 is fitted onto an object 3 to be fixed to be able to clamp with the above fixing means 2, one block of a metal material is formed into a primary shape-bending at both end parts without forming into the almost U-shape as the last shape with a cold-forging or a hot-forging, and after removing burr 10C generated in the primary shaped material 10 with the forging process, the primary shaped material 10 removing this burr 10C is formed into the almost U-shaped metal tool body 1 as the last shape with a bending press-working. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a clamping fixture that enables production of a generally U-shaped clamping fixture (metal fitting body) that exhibits extremely high strength using existing simple processing equipment.

  For example, there is a hook mounting bracket disclosed in Japanese Patent No. 2761856 (Patent Document 1) that employs this type of clamping fixture.

  The clamping fixture adopted in this Patent Document 1 will be described. A bolt 杆 is screwed to one free end of a substantially U-shaped bracket body, and the bolt 杆 tip is moved by a rotational screwing movement of the bolt 杆. Is provided with a tightening and fixing means having a structure that moves toward and away from the other free end, and the object to be attached can be clamped and fixed between the tip of the bolt rod and the other free end. And in this patent document 1, a hook hook part is provided in the surface part on the opposite side to the direction which the free both ends of a metal fitting main body protrudes, the said clamping fixture is fixed to the attachment object of a building, and a lifeline is attached to a hook hook part. It has a structure that can hook hooks that are connected to each other.

Japanese Patent No. 2761856

  Such clamping fixtures have been conventionally used in various equipment. For example, in the unlikely event that they are used for equipment that is related to human life, such as scaffolding construction hardware for constructing temporary scaffolds at construction sites, etc. The clamping fixture to be used is required to have a very high strength in order to protect human life.

  In order to increase the strength in order to meet this requirement, the metal fitting main body is made thick, and, for example, the joint portion with a clamp or the like for holding and fixing a single tube or the like may be widened.

  Further, it is considered that a high-strength product can be easily manufactured by forming a substantially U-shaped metal fitting body by forging.

  However, when trying to form a U-shaped, thick and wide forged product, there is a problem that the strength of the mold is not available and the mold cannot be cooled. The production of was impossible.

  Therefore, in the past, it was formed by roll rolling, and a metal body with high strength was obtained by cutting a long metal material having a substantially U-shaped cross section formed by this roll rolling into an arbitrary length. There are few factories in this rolling mill (so-called rolling mills) in Japan because of the decrease in demand, and trying to install new rolling mills is very expensive. The current situation is that it cannot be done.

  The present invention has been made through repeated research and trial and error as to whether it is possible to form a high-strength sandwich fixture (metal body) without using roll rolling in light of such a current situation. In addition, the present invention provides an epoch-making method for manufacturing a clamping fixture that makes it possible to produce a clamping fixture with high strength easily and at low cost by using existing processing equipment.

  The gist of the present invention will be described with reference to the accompanying drawings.

  This is a method of manufacturing a clamping fixture that is provided with a fixing means 2 in a metal fitting body 1 that has a substantially U-shape, and is configured such that the metal fitting body 1 is fitted onto an attachment object 3 and can be clamped and fixed by the fixing means 2. The bulk metal material is formed into a primary shape with both ends bent without forming into a final U shape by cold forging or hot forging. Further, the present invention relates to a method for manufacturing a clamping fixture, characterized in that the primary shape member 10 from which the burrs 10C have been removed is formed into the substantially U-shaped bracket body 1 as a final shape by bending press processing.

  Further, a lump of metal material is formed into the primary shape in which both end portions 10A bend in an inclined state with respect to the intermediate portion 10B by cold forging or hot forging, and this forging process produces the primary shape material 10. 2. The sandwiching device according to claim 1, wherein after removing the burr 10C, the primary shape material 10 from which the burr 10C has been removed is bent and pressed to form the metal body 1 having a substantially U-shape as a final shape. The present invention relates to a method for manufacturing a fixture.

  Since the present invention is configured as described above, it is possible to easily produce a metal fitting body with excellent strength by using existing forging equipment and press processing equipment without performing roll rolling. This is a method of manufacturing a clamping fixture with excellent properties.

  Further, in the invention of claim 2, the primary shape material formed by the forging process can be easily set on a die having a substantially U-shaped cross section that is open at the top of the bending press as shown in the embodiment, for example. Since the primary shape material is molded into a shape close to the final shape, even when the thick primary shape material is forged, the bending press work is easily performed and the mass productivity is further improved. It becomes a manufacturing method of a clamping fixture.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  First, a lump of metal material is forged cold or hot, and formed into a primary shape with both ends bent without being formed into a final U-shape. By this cold forging or hot forging, a highly accurate and tough molded product (primary shape material 10) can be obtained.

  Next, a burr 10C is generated in the primary shape material 10 which has become a primary shape by this forging process. This burr 10C is removed, and the primary shape material 10 from which this burr 10C has been removed is bent and pressed to obtain a final shape. The U-shaped metal fitting body 1 is molded.

  That is, instead of forming into a substantially U shape at a time by forging, first, the primary shape material 10 having a high primary shape is formed by forging, so this forging can be performed without any difficulty. The metal fitting body 1 having high strength can be formed by forming the primary shape material 10 into a substantially U shape later by bending press processing.

  Accordingly, by preparing existing forging equipment and press working equipment without requiring high equipment cost rolling equipment, it is possible to manufacture the metal fitting body 1 having high strength easily and at a lower cost than the rolling equipment. It becomes a manufacturing method of the clamp fixture which is excellent in practicality and can be made.

  Further, for example, a lump of metal material is formed into the primary shape in which both end side portions 10A are bent with respect to the intermediate portion 10B by cold forging or hot forging, and the primary shape material 10 is formed by this forging process. After removing the burrs 10C generated in step 1, the primary shape material 10 from which the burrs 10C have been removed is bent and pressed to form the final U-shaped metal fitting body 1 into a primary shape by a forging process. The primary shape material 10 can be easily set on a substantially U-shaped die 7A opened at the top of the bending press machine 7 as shown in the embodiment, for example, and the primary shape is formed by this primary forming (forging). Since the material 10 is formed in a shape close to the final shape as described above, even when the thick primary shape material 10 is forged, the bending press work will be performed well, which further improves mass productivity. become.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present embodiment shows a safety net tension metal fitting A, and shows a case where the present invention is applied to a clamping fixture K employed in the safety net tension metal fitting A.

  The safety net tension metal fitting A will be described. As shown in FIG. 1, as shown in FIG. 1, a metal fitting fixed to a fixing portion of a locking portion 5 for locking the safety net 4 and a mounting object 3 for tensioning the safety net 4. It consists of a main body 1.

  More specifically, the locking portion 5 is provided so as to protrude from a plate surface opposite to the side from which the free plate portions 1A protrude, of the intermediate plate portion 1B of the metal fitting body 1 having a substantially U-shape.

  In addition, the locking portion 5 is formed by bending a single metal rod into an annular shape so that the bent end portions are not in contact with each other and are separated from each other while maintaining a substantially parallel relationship. Thus, the safety net 4 can be hooked and locked from between the bent both ends, and the intermediate portion of this rod body is the side of the intermediate plate portion 1B of the metal fitting body 1 from which the free two plate portions 1A protrude. It is attached on the opposite side of the plate.

  Further, a fixing means 2 is provided on one free plate portion 1A of the metal fitting body 1 to constitute a holding fixture K.

  The fixing means 2 forms a screw hole 2B penetrating in the thickness direction of one free plate portion 1A. A screw 2A is screwed into the screw hole 2B, and the screw 2A is rotated and rotated. Thus, the tip of the bolt rod 2A is configured to move toward and away from the other free plate portion 1A.

  That is, the metal fitting body 1 is fitted on the attachment location of the attachment object 3 (the fixation object 3 is fixed between the two free plate portions 1A of the metal fitting body 1), and the bolt rod 2A is attached to the other side. When the rotation screwing operation is performed so as to move closer to the free plate portion 1A, the fixing portion is fixedly clamped and fixed between the tip end of the bolt rod 2A and the inner side surface of the other free plate portion 1A. 2 is constituted.

  In FIG. 2, the frame material (H steel) of the building in the middle of construction for which the safety net 4 is to be stretched is the attachment object 3, and the flange portion 3 </ b> A of this H steel 3 is used as the attachment location. The case where the tension fitting A is fixed is shown.

  Next, the manufacturing method of the clamping fixture K of this embodiment and the manufacturing method of the safety net extension fitting A will be described.

  First, a lump of metal material is formed into a primary shape material 10 having a primary shape in which both ends of a flat plate are bent without being formed into a substantially U-shape as a final shape by cold or hot forging.

  More specifically, the developed shape is a thick and highly accurate rectangular flat plate shape, and as shown in FIG. 3, the lengthwise both ends (plates) 10A of the primary shape material 10 are intermediate ( (Plate) portion 10B is bent in an inclined state, and the intermediate (plate) portion 10B is formed in a shape close to a U-shape that protrudes upward in the drawing. Reference numeral 6 in the figure denotes a mold.

  The primary shape material 10 having such a shape (primary shape) does not place a burden on the mold 6 and can cool the mold 6 and is forged (formed) without difficulty.

  In the present embodiment, the primary shape material 10 is formed by one forging. The primary shape material 10 may be formed by performing forging a plurality of times.

  Next, since the burrs 10C are generated on the outer peripheral edge of the primary shape material 10 formed by this forging, the burrs 10C are accurately removed by, for example, cold pressing or hot pressing.

  Next, the primary shape material 10 from which the burrs 10C have been removed is set on a die 7A of a molding die of the bending press machine 7. In addition, the die 7A uses a die having a substantially U-shaped cross-section with an upper opening, but at this time, the primary shape material 10 is formed in a shape (primary shape) close to the above-described U-shape. It is easy to set so that the bent portions on both sides, which are continuous portions of the end side plate portion 10A and the intermediate plate portion 10B, of the primary shape member 10 are positioned inside the opposed upper open edges of the die 7A. (Refer to the two-dot chain line portion in FIG. 4).

  Then, the primary shape material 10 set on the die 7A is pressed by a substantially prismatic punch 7B having a width smaller than the opening width of the die 7A as shown in FIG. The U-shaped metal fitting body 1 is molded.

  In this way, a metal body 1 (clamping metal fitting K) that is thick and wide and has a very high strength was completed without roll rolling.

  In addition, a single metal rod is bent and formed in an appropriate manner by an appropriate method, and the bent ends are bent so as to be separated from each other while maintaining a substantially parallel relationship without contacting each other. The latching part 5 is comprised, and the intermediate part of the bar | burr body which is this latching | locking part 5 is weld-fixed to the plate surface on the opposite side to the side from which the free plate part 1A of the intermediate plate part 1B of the metal fitting body 1 protrudes.

  Next, according to a conventional method, a screw hole 2B for screwing the bolt rod 2A, a plating process or the like is performed, and the bolt rod 2A is screwed into the screw hole 2B to complete the safety net tension fitting A.

  FIG. 5 shows another embodiment, which is used for constructing a temporary scaffold by welding and fixing a clamp 8 to an intermediate plate portion 1B of a metal fitting body 1 (clamping metal fitting K) formed by the same manufacturing method as described above. The case where the single pipe fixing bracket B is configured is shown.

  In particular, when the clamping fixture K is used as a tool related to human life, such as the single pipe fixture B for constructing a temporary scaffold, the plate thickness is increased and the intermediate portion that becomes a joint portion with the clamp 8 is used. The primary shape material is formed (forged) so that the lateral width of the plate portion 10B is increased. Since the holding fixture K thus obtained has a very high strength, it is an extremely useful device for this type of application.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is a perspective view which shows the safety net tension metal fitting completed by the present Example. It is a perspective view which shows the use condition of the safety net tension metal fitting of a present Example. It is explanatory drawing which shows the state which shape | molded the metal material in the plate shape by forging. It is explanatory drawing which shows the state which bent the primary shape material shape | molded by forge with a bending press machine, and shape | molded the metal fitting main body. It is a perspective view which shows another Example of this invention.

Explanation of symbols

1 Metal fitting body 2 Fixing means 3 Object
10 Primary shape material
10A end side
10B Middle part
10C Bali

Claims (2)

  A method of manufacturing a clamping fixture comprising a metal fitting body having a substantially U-shape, and a fixing means, wherein the metal fitting body is fitted to an attachment object and can be clamped and fixed by the fixing means. The material is formed into a primary shape with both ends bent without forming into a substantially U-shape which is the final shape by cold forging or hot forging, and the burrs generated in the primary shape material by this forging process are removed. A method for manufacturing a clamping fixture, wherein the shape material is formed into a substantially U-shaped metal fitting body having a final shape by bending press processing. A lump of metal material is formed into the primary shape in which both side portions are bent in an inclined state with respect to the intermediate portion by cold forging or hot forging, and burrs generated in the primary shape material are removed by this forging process. 2. The method for manufacturing a clamping fixture according to claim 1, wherein the primary shape member from which the burrs have been removed is bent and pressed to form a substantially U-shaped bracket body having a final shape.

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