JPH0657513U - Crankshaft mirror cutter device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable machining with high surface roughness. In a cutter device for a crankshaft mirror in which a plurality of chips 2 are arranged in two rows on an inner peripheral surface of a ring-shaped cutter body 1, a part of the chips 2 is used as a front blade 4 and By attaching the cutting edge 4 to the cutter body 1 with a clearance angle of 0 °, the parallelism of the cutting edge 4 can be easily ensured, and thus milling with high surface roughness can be performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutter device for a crankshaft mirror capable of processing with high surface roughness.

[0002]

[Prior art]

 As a conventional cutter device of this type, those disclosed in, for example, Japanese Utility Model Laid-Open No. 59-5221, Japanese Utility Model Laid-Open No. 59-5216, and Japanese Utility Model Publication No. 3-25863 are known. Each of these has a structure in which chips are attached in two rows on the inner peripheral surface of the ring-shaped cutter body, and is configured to machine the outer peripheral surface of the crankshaft pin or journal, and to perform groove processing on these. ing. A cutter device has also been proposed in which a part of the tip is used as a flat blade so that the undercut portion can be milled when the crankshaft is grooved by the undercut.

[0003]

[Problems to be solved by the device]

 However, in the conventional cutter device that uses a part of the tip as a flat blade, the clearance angle is attached to the cutter body and the flat blade is fixed to the cutter body. In addition, the clearance angle error of the cutting edge itself overlaps and the parallelism deteriorates, resulting in waviness on the machined surface and the inability to machine with high surface roughness. The present invention has been made in order to improve the above problems, and an object thereof is to provide a crankshaft mirror cutter device capable of processing with high surface roughness with a simple structure.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, this invention is a cutter device of a crankshaft mirror in which a plurality of chips are arranged in two rows on the inner peripheral surface of a ring-shaped cutter body, and a part of the chips is exposed. In addition, these cutting blades are attached to the cutter body with a clearance angle of 0 °.

[0005]

[Work]

 With the above-described configuration, there is little influence on the mounting error of the cutting blade and the manufacturing accuracy of the cutting blade itself, so that it is possible to perform processing with high roughness.

[0006]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a crankshaft machining cutter device, FIG. 2 is a plan view of the same, and FIG. 3 is a sectional view taken along line XX of FIG. In these figures, 1 is a cutter body, and 2 is a chip attached to the cutter body 1. On the inner peripheral portion of the cutter body 1, a plurality of chips 2 located on both sides of the cutter body 1 are attached at equal intervals in the circumferential direction. Each of the tips 2 is formed in a flat rectangular shape, and has a radial rake angle α in the rotational direction as shown in Fig. 1 so that the main journal and pin journal of the crankshaft can be grooved. As shown in FIG. 2, an axial rake angle β is attached to the side surface of the cutter body 1, and a clearance angle γ is attached to the tip side so as to project outward as shown in FIG. Is attached to.

Further, a part of these chips 2 is a cutting blade 4, and these cutting blades 4 are attached to the cutter body 1 so that the clearance angle γ becomes 0 ° as shown in FIG. Note that FIG. 4 is an enlarged view within the Y circle of FIG.

Next, the operation will be described. When the cutter body 1 rotates, grooving is performed by the tip 3 provided with a clearance angle γ, and at the same time, the saw blade 4 mills the side surface of the work. Further, since the clearance angle γ of the cutting blade 4 is set to 0 ° with respect to the cutter body 1, it is easy to obtain parallelism when processing the cutting blade mounting portion of the cutter body 1 and the cutting blade 4 itself. As a result, the cutting blade 4 can be accurately attached to the cutter body 1. As a result, there is no possibility that the machining error of the serrated blade mounting portion will be overlapped with the error of the serrated blade 4 itself and the flatness will not deteriorate, so that machining with high surface roughness becomes possible.

[0009]

[Effect of device]

 As described in detail above, in this invention, since the side cutting blade for milling the side surface is attached to the cutter body at a clearance angle of 0 °, it can be accurately attached to the side cutting blade body. As a result, no waviness occurs on the machined surface due to the machining error of the saw blade mounting portion during processing or the dimensional error of the saw blade itself, so that machining with high surface roughness can be easily performed.

[Brief description of drawings]

FIG. 1 is a side view showing a cutter device of a crankshaft mirror according to an embodiment of the present invention.

FIG. 2 is a plan view showing a cutter device for a crankshaft mirror according to an embodiment of the present invention.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is an enlarged view within a Y circle of FIG.

[Explanation of symbols]

 1 ... Cutter body, 2 ... Tip, 4 ... Sweeper blade.

Claims (1)

[Scope of utility model registration request] 1. A cutter device for a crankshaft mirror in which a plurality of chips 2 are arranged in two rows on an inner peripheral surface of a cutter body 1 having a ring shape, and a part of the chips 2 is used as a front blade 4. , These clearance blades 4 have clearance angle 0
Crankshaft mirror cutter device attached to the cutter body 1 at °.