JPH0760540A - Internal working edge unit and internal working device using the same edge unit - Google Patents

Abstract

PURPOSE:To perform working a surface finish by forming a plurality of edge parts for working an internal surface of an inner hole in an element wire of a cylindrical coil spring-shaped tool main unit, so as to remove a bur present in the internal surface of the inner hole. CONSTITUTION:A base part of a tool main unit 1 is fitted to a tool extruding mechanism, and by this tool extruding mechanism, the tool main unit 1 of cylindrical coil spring shape, formed by winding an element wire M in a coil shape, is inserted into an internal hole of a workpiece, to perform pressure extrusion. By this pressure insertion, in a plurality of edge parts 2 formed in the element wire M, a cast burr, provided in an internal surface of the internal hole of this workpiece, is removed to be worked. Here is deflected the tool main unit 1 in accordance with bending of the internal hole, to pressure insert the tool main unit while deflecting into even the bent internal hole, and the burr in the bent internal hole is removed. Further, since the tool main unit 1 is formed in a cylindrical coil spring shape, by adjusting the tool main unit 1 rotated in the right or left direction, its external diameter D is spread or contracted, and work inserting the tool main unit is smoothed.

Description

Detailed Description of the Invention

[0001]

The present invention relates to, for example, cast iron products, cast steel products,
The present invention relates to an inner surface processing blade used for removing burrs existing on the inner surface of an inner hole of a workpiece such as a cast product and finishing the inner surface, and an inner surface processing apparatus using the same.

[0002]

2. Description of the Related Art Conventionally, when removing burrs or protrusions present on the inner surface of an inner hole of a cast iron product of this type, a grindstone is attached to the rotating portion of an electric tool or the like, and an operator grips the electric tool or the like. ,
The rotating grindstone is pressed against the inner surface of the inner hole and removed by the action of the grindstone.

[0003]

[Problems to be Solved by the Invention] However,
It is a completely manual work, and it is very troublesome for a workpiece with a deep inner hole, and it may cause pain to the worker. ing.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and the inner surface machining blade of the first invention enables pressure insertion through an inner hole of a workpiece. And a plurality of blade portions capable of processing the inner surface of the inner hole are formed on the strand of the tool body.

Further, the inner surface machining apparatus of the second invention comprises a holding mechanism capable of holding a workpiece and a tool pushing mechanism capable of press-inserting a tool body having the blade portion in an inner hole of the workpiece. It will be done.

[0006]

[Operation] An inner surface of an inner hole is machined by a plurality of blades formed on the element wire by pressing a cylindrical coil spring-shaped tool body formed by winding the element wire into the inner hole of a workpiece. Will be done.

[0007]

1 to 7 show an embodiment of the present invention, FIGS. 1 and 2 show a first embodiment of the first invention, and FIGS. 3 to 5 show a first embodiment of the second invention, FIG. 6 shows a second embodiment of the second invention, and FIG. 7 shows a second embodiment of the first invention.

In the first embodiment of the first invention of FIGS. 1 and 2, reference numeral 1 is a tool body, for example, a wire M as a spring steel wire having a wire diameter d = 10 mm is wound in a coil shape to have an outer diameter. D =
The length L is 100 mm, and the length L is formed in a cylindrical coil spring shape according to the length of the workpiece. In this case, the outer diameter of the tip of the wire M is formed with a taper angle θ.

Reference numeral 2 denotes a blade portion, which is made of, for example, high-speed steel, a cemented carbide tip, or the like, and a plurality of blade portions 2 are arranged on the front surface side of the wire M at intervals, and embedded welding is performed for the length of L _1. It is formed by welding overlay or the like, and in this case, the blade portions 2 adjacent to each other in the longitudinal direction of the tool body 1 are formed so as to be staggered with respect to each other.

FIGS. 3 to 5 show a first embodiment of the second invention, which is applied to a deburring device for the inner surface of a cast iron elbow pipe as a workpiece W in this case. D
Is adapted to the inner diameter of the inner hole C of the workpiece, and the total length L is formed to a length corresponding to the length of the inner hole C.

Reference numeral 3 is a holding mechanism, and in this case, the workpiece W
A holding member 4 capable of holding one surface of the workpiece W, a clamp member 5 capable of pressing and holding the other surface of the workpiece W, and a clamping cylinder 6 for moving the clamp member 5 forward and backward.

Reference numeral 7 denotes a tool push-out mechanism, which in this case comprises a push-out member 8 which can be fitted to the base of the tool body 1 and a cylinder mechanism (not shown).

Since the first embodiment has the above-mentioned construction, the holding mechanism 3 clamps the cast iron elbow pipe as the workpiece W, the tool extruding mechanism 7 is fitted with the base portion of the tool main body 1, and the tool extruding mechanism is operated. A cylindrical coil spring-shaped tool body 1 in which a wire M is wound in a coil shape around an inner hole C of a workpiece W by 7
It is to be pushed through in the direction of N in the drawing and the plurality of blade portions 2 formed on the wire M by this pressure insertion are to remove the casting burr existing on the inner surface of the inner hole C. At this time, the tool body 1 can be flexed according to the bending of the inner hole C as shown in FIG. 4, and can be press-inserted while bending even in the bent inner hole C, and the burr of the bent inner hole 3 is removed. Therefore, the work efficiency can be remarkably improved.

Further, since the tool body 1 is formed in a cylindrical coil spring shape, the outer diameter D can be expanded or reduced by adjusting and rotating the tool body 1 to the right or left. The tool body 1 can be smoothly inserted under pressure and can be adapted to the inner diameter of the inner hole C, so that the finishing process can be favorably performed.

FIG. 6 shows a second embodiment of the second invention. In this case, a structure of another example of the tool extruding mechanism 7, in which the extruding member 8 which can be fitted to the base of the tool body 1 is shown. It is composed of a cylinder mechanism (not shown) and a rotation mechanism (not shown).

In the second embodiment, the tool pushing mechanism 7 inserts a cylindrical coil spring-shaped tool body 1 formed by winding a wire M in a coil shape into an inner hole C of a workpiece W in the drawing. N
The tool main body 1 can be continuously rotated in the R direction in the figure at the same time as it is extruded and pressed in the direction. The existing casting burrs can be removed, and the working efficiency can be remarkably improved.

FIG. 7 shows a second embodiment of the first invention,
In this case, the tool body 1 is formed by using the strand M having a rectangular cross section.

Also in this second embodiment, the same operational effect as that of the first embodiment can be obtained.

The present invention is not limited to the above-mentioned embodiment, and for example, the cross-sectional shape of the wire, the shape and number of the blade portions 2,
The structure of the holding mechanism and the tool extruding mechanism are appropriately changed and designed, and the workpiece W is not limited to the curved inner hole shown in the above embodiment, and the inner surface of a straight inner hole can be machined. Not only the removal but also the finishing of the inner surface of the inner hole can be applied.

[0020]

INDUSTRIAL APPLICABILITY As described above, the inner surface processing blade of the present invention and the inner surface processing apparatus using the same hold a workpiece by the holding mechanism and wind the element wire into a coil by the tool pushing mechanism. By extruding and pressing the coil spring-shaped tool body through the inner hole of the workpiece, the burr existing on the inner surface of the inner hole can be removed and the surface can be finished by the multiple blades formed on the wire. Therefore, the tool body can be bent in accordance with the bending of the inner hole, so that the bent inner hole can be processed and the working efficiency can be remarkably improved.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the first invention.

FIG. 2 is a cross-sectional view of the first embodiment of the first invention.

FIG. 3 is a side view of the first embodiment of the second invention.

FIG. 4 is a side view of the operating state of the first embodiment of the second invention.

FIG. 5 is a partially enlarged view of the first embodiment of the second invention.

FIG. 6 is a side view of the second embodiment of the second invention,

FIG. 7 is a partially enlarged view of the second embodiment of the first invention.

[Explanation of symbols]

 W Workpiece M Elementary wire 1 Tool body 2 Blade part 3 Holding mechanism 7 Tool extruding mechanism

Claims (2)

[Claims] 1. A tool body having a cylindrical coil spring shape in which a wire is wound in a coil shape so that it can be inserted into an inner hole of a work piece under pressure, and an inner surface of the inner hole can be machined on the wire of the tool body. A blade for inner surface processing, which is formed by forming multiple blades. 2. An inner surface processing comprising a holding mechanism capable of holding a work piece, and a tool extruding mechanism capable of press-inserting a tool body having the blade portion according to claim 1 into an inner hole of the work piece. apparatus.