JP2003112227A - Spinning tool and working method therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning tool and its usage that develop spinning technique for various purposes other than riveting. SOLUTION: A part to be worked is arranged on an extension line of the rotary shaft of the spinning tool body. A bit is attached to the spinning tool body freely rotatably and in the manner inclined to the rotary shaft. The tip end of the bit is in contact with the part to be worked, repeating a rolling and pressurizing operation to form the part of an object material, deforming it and working an object workpiece. In using the spinning tool with a robot, the tool body is placed on a stand and moved to a machining position, with a shank held by the chuck of a rotary device attached to a robot hand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses the principle of deforming a mating material by pressing an inclined tool to rotate it, which has been used as a means for crimping the end face of a rivet as one method for fastening mechanical parts. The present invention relates to a tool that can be used in more diverse fields of product manufacturing processes by expanding its applications.

[0002]

2. Description of the Related Art As a conventional technique, there is a riveting machine used by Brother Industries, Ltd., which is used as a riveting machine for caulking rivets and is known as a trademark "High Spin". In addition, Suzuki Koki Co., Ltd. also manufactures a riveting machine with a similar mechanism.

[0003]

In the conventional riveting machine, the rotating device, the press elevating mechanism, and the tool mounting portion are integrally assembled and fixed to the cast iron frame, and only the tip tool can be replaced. Its use is limited to the crimping work of rivets, and the shape of the crimped portion can be changed. On the other hand, the room temperature spin processing technology has been studied in the field of plastic working, and its superiority in strength and surface performance after deformation processing has been confirmed. An object of the present invention is to develop a spin processing tool and a method of using the spin processing technique, which can be applied to various applications other than just riveting.

[0004]

A rotary pressing mechanism and a spin tool are separable via a chuck and a shank, and are attached to a general-purpose hand tool, machine tool, or robot.

[0005]

According to the present invention, the spin forming tool is operated in accordance with the point position, the line, and the free path, and the riveting, chamfering,
Various bending and marking processes can be performed. By exchanging and using a spin forming tool with a common shank, various spin deformation processes can be performed in combination.

[0006]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of an embodiment of the present invention. The shank 1 is gripped by the chuck of the rotating and pressing mechanism. Tool body 2
The axis of the hole H, which is provided at an angle with, intersects the center line of the shank 1 at point A, and the tip of the bit 7 is near point A.
It has various shapes shown in FIG. 2, and the object to be processed is rotated and pressed to be deformed following the tip shape. The bit 7 is rotatably supported by the thrust bearing 3 and the radial bearing 5,
The wire spring 6 held by the spacer 4 enters the groove formed in the bit 7 and prevents the wire spring 6 from falling off. When used in a robot, the shank 1 is placed on the tool holder 8 so that the position of the shank 1 is constant. The angle Θ is the angle of the bit 7 with respect to the shank 1, and is selected from 3 degrees to 75 degrees according to the target shape of the workpiece. The shank 1 is basically cylindrical in shape,
A hexagonal shape is desirable when used with a hand drill, and a tapered shank is desirable when used with a machine tool.

FIG. 2 shows an example of processing a rivet. Bit 7
The processed shape corresponding to the tip shape of FIG. If you give a circular path to the spin forming tool using a machine tool or robot,
Machining can be performed even for a cylinder inner diameter that is larger than the machining diameter of the bit tip. Figure 3 shows chamfering, rounding, tab bending,
It is a processing example of marking. These are examples of machining performed by adding motion and feed according to the trajectory. Machining is performed by repeatedly moving along the locus while gradually lowering the height.
FIG. 3C shows an operation example of the spin forming tool at the time of tab bending. By inclining the tool in sequence and performing a feed operation, the tool is brought into close contact with the mating part. FIG. 3 (4) shows the tip shape of the marking bit. Attach a tip made of super hard material to the tip. If the shape of the tip is spherical, the tool life becomes long, and if it is made into a conical shape with an angle Θ, the groove bottom is flat and the visibility is good. If the angle α is made larger than the angle Θ and the feeding operation is performed,
A spiral-shaped trace of the indentation is formed, and the rise around the marking can be reduced.

[0007]

As described above, according to the spin forming tool of the present invention, the range of application of the spin processing technology is expanded, and not only the rivet crimping work, but also chamfering, rounding, deburring, tab bending, and component fixing. It is possible to perform marking work. That is, the spin forming tool of the present invention can be mounted and used not only on a hand tool but also on a machine tool or a robot, and can be processed along not only points but also lines or free trajectories. Further, if the robot performs the work by exchanging a plurality of spin-forming tools having different bit shapes, the respective works can be performed in combination, and the robot can have multiple functions.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a spin forming tool according to the present invention.

FIG. 2 is an explanatory diagram of an example of rivet processing according to the present invention.

FIG. 3 is an explanatory view of chamfering, corner rounding, tab bending, and marking processing according to the present invention.

[Explanation of symbols]

A intersection of shank center line and bit center line H inclined hole Θ angle formed by shank center line and bit center line α angle formed by a plane orthogonal to the bit center line and outer peripheral surface of bit tip 1 shank 2 body 3 thrust bearing 4 spacer 5 Radial bearing 6 Wire spring 7 Bit 8 Tool stand

Claims (5)

[Claims] 1. The present invention relates to a shank 1, a tool body 2, and bearings 3 and 5 attached to the tool body 2 inclining in a range of 3 to 75 degrees with respect to the shank center axis, and rotatable to the bearings. In a spin forming tool that consists of the bit 7 inserted into the shaft, and the contact part of the bit tip is located on the center axis of the shank Forming tools and processing methods using them. 2. The spin forming tool according to claim 1, wherein a rivet, an eyelet, a cylindrical end surface, and a cylindrical end surface are processed by rotary pressing with a hand drill, a vibration drill, a hand driver, and a drilling machine, and a processing method using the same. 3. The combination of machining of a point, a line, or a free locus by a human-operated or programmed locus by moving a rotary pressing head such as a milling machine or moving a bed according to claim 1. A spin forming tool and a processing method using the same. 4. The robot hand according to claim 1, wherein a rotating device having a chuck is attached to the robot hand, and the chuck is used to select and hold one or several spin forming tool shanks. Alternatively, a spin forming tool and a processing method using the same are characterized by performing free path processing in combination. 5. The method according to claim 1, wherein each of the riveting, bending, marking, deburring, component fixing, and joining processes is performed singly or in combination by changing the bit tip shape, the locus, and the pressing angle. Characteristic spin forming tool and processing method using the same.