JPH0241865A - Honing head - Google Patents

Abstract

PURPOSE:To adequately work partially superposing two holes by providing a pair of the support members having a reverse circular arcuate shaped notch of about the same curvature with that of the other part of the hole as well as adjustable to the dimension coincided with the hole internal diameter by inserting into one part of the hole and moving in the radial direction freely expandably and contractably, and a honing tool grinding the hole internal face of the other part. CONSTITUTION:A pair of expansion free support members 6 and a honing tool 4 are linked in parallel each other and in the specified positional relation aligned to the shaft center of two circular holes by the bonding members 2, 3 arranged at the upper and lower parts thereof. This bonding member 2, 3 is made variable, the diameter of the support member 6 is made coincident with the bore diameter of one part of the hole by a diameter adjusting member 7 and the hole internal face of the other part is subjected to grinding by the honing tool 4. Consequently, the internal face of two circular holes on which one part of the circular hole is superposed can be subjected to grinding in a short time without using a nest.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a honing head used for machining the inner surface of two circular arc-shaped holes that partially overlap each other.

[Conventional technology]

A circular hole inner surface 9 having a notch 10 as shown in FIG.
As a finishing method for grinding, there is generally a method in which a nest 11 is inserted into the notch 10 to form a circular hole without a notch. In addition, if the hole depth is shallow, machining with a universal grinder using an internal grinding jig may be considered.

Japanese Utility Model Application Publication No. 54-23392 discloses a technique in which, when the hole is deep, a nest is inserted into the notch and the hole is ground into a circular shape using a honing head. At this time, the insert is worn out by honing, but a supporting jig using a wedge provided behind the insert is used to push the insert according to the amount of wear.

[Problems to be Solved by the Invention] In the conventional processing method using a nest, the manufacturing and insertion of the nest requires man-hours and costs.

An object of the present invention is to process the inner surfaces of two circular arc-shaped holes where a portion of the circular holes overlap each other without nesting, by attaching the honing head of the present invention to a conventional honing machine, without modifying the main body of the honing machine. The purpose of the present invention is to provide a honing head that can be used for honing.

[Means for solving problems]

The present invention has an inverted arc-shaped notch that can be inserted into one hole and can be expanded and contracted in the radial direction, and can be adjusted to a part of the inner diameter of the hole. This honing head is characterized by comprising a support member, a honing tool that grinds the inner surface of the other hole, and a connecting member that holds the support member and the honing tool parallel to each other and in a predetermined positional relationship.

[Function] By using a honing head composed of a pair of support members and a honing tool as described above, a portion of a circular hole can be partially aligned with each other without modifying an existing honing device and without using a nest. It becomes possible to machine overlapping circular holes.

〔Example〕

The present invention will be explained based on drawings of embodiments. Fig. 1 is a detailed diagram illustrating the present invention used for internal grinding of two circular deep holes in which parts of the circular holes overlap each other; A is a partial cross-sectional view when cut at right angles to the hole center; B is a partial sectional view taken along a plane including the axes of both circular holes.

The honing head is inserted into one hole and can be expanded and contracted in the radial direction by an adjustment mechanism (not shown) to adjust the diameter according to the hole dimensions. The honing tool 4 includes a support member 6 having a notch 6', and a honing tool 4 that rotates while being expanded by a grindstone expansion and driving device (not shown).

Further, the pair of telescopic support members 6 and the honing tool 4 are connected in a predetermined positional relationship parallel to each other and aligned with the axes of the two circular holes by connecting members 2 and 3 disposed above and below. The connecting members 2 and 3 are variable and configured to accommodate any axial center distance.

〔Effect of the invention〕

According to the present invention, it is possible to perform nestless machining of two circular holes in which parts of the circular holes overlap each other, which was previously impossible, without modifying the main body of the honing device, which significantly reduces machining man-hours, costs, and machining time. reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the honing head of the present invention.
B is a sectional view taken perpendicularly to the center of the hole, and B is a sectional view taken along a plane including the axes of both circular holes. FIG. 2 is a sectional view showing an example of machining a circular hole having a notch using a conventional nest. 1; Drive shaft; 2; Connecting member; 3; Connecting member; 4; Honing tool; ; Circular hole inner surface, lO; notch, II; nest. (B) Figure 1

Claims (2)

[Claims] (1) In a honing head that grinds and finishes the inner surfaces of two circular holes where some of the circular holes overlap each other, the honing head is inserted into one of the holes and can be expanded and contracted in the radial direction to adjust the dimensions to match the inner diameter of the hole. A support member having a notch in the shape of an inverted circular arc with approximately the same curvature as the curvature of the other hole, a honing tool for grinding the inner surface of the other hole, and the pair of support member and honing tool are arranged parallel to each other and at a predetermined position. A honing head comprising a connecting member that holds the honing head in position. (2) The honing head according to claim 1, wherein the length of the connecting member is made variable so that the distance between the centers of the two circular arcs can be changed.