JP3572039B2 - Lead processing method for outer diameter part and shape part of artificial diamond tool - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lead processing method for an outer diameter portion and a shape portion of an artificial diamond tool (PCD tool).
[0002]
[Prior art]
Conventionally, a PCD tool formed by integrally sintering an artificial diamond (PCD) chip on a super-hard substrate is a cutting tool in which the PCD chip (PCD chip) is formed flat in the axial direction and the radial direction of the blade body. The lead processing method has a configuration in which a lead edge is formed by attaching to a groove and using polishing or wire processing. The PCD tool which is mounted on the flat surface and formed by the lead processing method has variations in the precision of the lead edge (lead edge) or the high hardness of the PCD chip, so that the cutting edge of the processing device (the processing side) is difficult. The edge of the cutting edge is severely worn, and the accuracy of the cutting edge on the processing side cannot be ensured. In addition, the PCD tool has disadvantages such as variations in the accuracy of the lead edge. In particular, the present invention relates to a PCD tool in which a PCD chip is attached to a cutting groove formed at an angle in the axial direction and / or the radial direction (formed at an angle in the axial direction and the radial direction) of the blade main body intended by the present invention. However, a PCD tool having a high-precision lead edge could not be machined at all.
[0003]
Note that there is an end mill tool in which a tip is attached to a cutting groove formed at an angle in the axial direction and the radial direction of the blade body. For example, there is a throw-away end mill tool in which a throw-away tip exhibits excellent fracture resistance by deep groove cutting in Japanese Patent Application Laid-Open No. 2001-232512 (literature). The content is that the chip is mounted under the deep groove cutting conditions with a relatively small inclination angle to the groove cutting surface, and chipping and chipping do not occur at the cutting edge ridge of the chip even when performing deep groove cutting, A configuration that exhibits excellent performance has been disclosed. The feature is that labor saving, energy saving, or cost reduction of groove cutting can be achieved, and a groove as deep as possible can be formed by one groove cutting.
[0004]
[Problems to be solved by the invention]
A conventional method of attaching a PCD chip to an incision formed at an angle in the axial direction and the radial direction of the blade portion main body and performing lead edge processing is based on the above-described polishing or wire processing. And / or when wear is considered. There is also a problem in terms of accuracy.
[0005]
In addition, the said document does not cause chipping or chipping on the cutting edge ridge portion of the chip even when performing deep groove cutting processing forming an angle in the axial direction, so that excellent performance is exhibited over a long period of time. Is disclosed. However, PCD processing intended by the present invention is not intended. Therefore, this is not a method of attaching a PCD chip to a cut groove formed at an angle in the axial direction and processing the lead edge.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a method for processing a lead edge shape by attaching a PCD chip to a groove formed at an angle in an axial direction and a radial direction, and reduces a load on a cutting edge on a processing side. It is intended to solve problems such as abrasion, to secure a highly accurate lead edge shape, and the like.
[0007]
According to the first aspect of the present invention, an artificial diamond tool composed of a kerf provided at an angle in the axial direction and the radial direction, and an artificial diamond cutting blade attached to the tip of the kerf is set in a wire processing machine. Thereafter, the mounting error of the cutting edge of the artificial diamond tool is measured, the numerical value of the error is input to the control unit, the numerical value is processed, and based on the processed numerical value, the wire of the wire processing machine is used. An angle and a rotation angle of the artificial diamond tool are set, and while maintaining the set angle of the wire, the rotation angle of the artificial diamond tool and an axial movement amount of the wire are controlled to obtain a predetermined lead edge shape. This is a method of processing the outer diameter and the shape of a synthetic diamond tool.
[0008]
The invention according to claim 2 provides a method of attaching a PCD chip to a cutting groove formed at an angle in the axial direction and the radial direction of the blade body, and processing the lead edge.
[0009]
A second aspect of the present invention is a lead machining method for an outer diameter portion and a shape portion of an artificial diamond tool having a configuration in which an angle of a wire is maintained at a taper angle along a second angle of a cutting edge shape portion.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, PCD machining is performed using an oil-based wire electric discharge machine in order to reduce the load on the cutting edge on the machining side or eliminate problems such as wear and secure high-precision lead edge machining. The advantages of using this oil-based wire electric discharge machine are the following two points.
[0011]
{Circle around (1)} Since the wire wire serving as the cutting edge on the processing side is always supplied in the same shape, high-precision processing can be achieved by using numerical control.
{Circle around (2)} Machining by oily wire electric discharge, non-contact machining of the PCD chip is possible, and no machining damage is given to the PCD chip by utilizing fine electric discharge machining by oily wire electric discharge machining.
{Circle around (3)} A highly precise lead edge processing can be performed on a complicated shape that cannot be achieved by polishing using numerical control and error correction means.
[0012]
Further, the present invention corrects an accuracy error due to brazing by the following method.
[0013]
The PCD chip brazed to the kerf provided at an angle in the axial direction may cause distortion, height, levelness, parallelism, etc. when mounted on both centers of the oil-based wire discharge machine or the collet chuck. Error occurs. If machining is performed with this error, the machining accuracy is naturally adversely affected, resulting in a dimensional accuracy error of the lead edge of the PCD tool. Therefore, according to the present invention, setting is performed using the following method, a setting error is measured, and this error is processed at the beginning of the year. After setting the PCD chip in the rotary indexing type indexing device, measure the upper surface of the PCD tool material with a dial gauge so that it is horizontal in the radial direction, and correct it so that it is parallel. The level of the PCD tool material is secured. Then, a difference in height from the processing start point of the PCD tool material to the processing end point is measured. Further, various conditions such as a PCD chip mounting angle of the PCD tool material are measured, and the measured values are input to a control unit of the computer. Based on the measurement values input to the control unit, the control unit calculates the amount of movement in the outer shape direction and the axial direction, and determines the rotation angle of the PCD tool material. Numerical values required for each processing calculated by the control unit are sequentially output, and processing based on the numerical values is performed as described later.
[0014]
{Circle around (4)} The processing steps will be described.
As the elements for calculating the rotation angle, the measured values of the taper angle of the processing surface, the outer diameter of the processing shape, the step difference between the start point and the end point, and the axial movement amount are used. An operation is performed based on the measured value to calculate a processing rotation angle. Based on this calculated numerical value, the wire moves from the processing start point to the processing end point to perform the processing. At this time, the PCD tool material rotates. The lead edge shape is processed on the PCD chip through this rotation processing.
[0015]
In the processing of the lead edge shape of the PCD chip, in the processing example including the moving processing in the radial direction, each point is processed through an arithmetic processing for calculating each point together with the moving amount rotation angle. Then, at that time, the lead processing is performed in a state where the wire is supported at a taper angle along the second corner of the cutting edge portion.
[0016]
Further, in the processing example in which the processing shape includes the axial movement processing, the cutting edge shape portion is previously set to the second corner in order to secure the easiness and stability of the wire processing and to ensure the high precision of the processing. The wire moves and the PCD tool material rotates while maintaining the vertical state of the wire by performing the processing through the arithmetic processing in which the position of the processing start point is corrected in the radial direction. The lead edge shape is processed on the PCD chip through the following rotation processing.
[0017]
【Example】
Hereinafter, an example of the present invention will be described.
[0018]
As shown in FIG. 1, a PCD 3 is brazed to a PCD tool blank 2 having a deep inclined cut groove 1.
[0019]
This PCD tool material 2 is mounted on both centers or collet chucks 4 of an oil-based wire discharge machine.
[0020]
In the drawing, 10 indicates the measured processing start point, and 20 indicates the measured processing end point. B indicates the axial movement amount of the processed shape. W indicates a processing rotation angle.
[0021]
Note that the following equation is used for the angle of the PCD 3 shown in FIGS.
Height of starting point 10 0 Height of ending point 20 a Movement amount in axial direction b
0−a = A A ÷ b × tan ⁻ = BB = PCD Angle The processing rotation angle W shown in FIG. 3 employs the following equation.
Machining surface taper angle B, machining shape outer diameter dimension K, step A between start point 10 and end point 20, amount of axial movement b
K ÷ 2 = R A = b × tanB A ÷ R * Sin ⁻ 1 = W
In FIG. 4, reference numeral 30 denotes a vertically set wire, and reference numeral 40 denotes a radial correction amount formed by the processed shape outer diameter K and the wire 30. Reference numeral 50 denotes a second corner position indicating a state in which the PCD tool material 2 is previously inclined to the second corner.
[0022]
In the figure, reference numeral 60 denotes a finished PCD tool.
[0023]
【The invention's effect】
The invention according to claim 1 sets an artificial diamond tool, which is composed of a kerf provided at an angle in the axial direction and the radial direction, and a synthetic diamond cutting blade attached to the tip of the kerf, in a wire processing machine. Then, measure the mounting error of the cutting edge of the artificial diamond tool, input the numerical value of the error to the control unit, calculate the numerical value, and based on the processed numerical value, It is characterized in that it sets the rotation angle of the diamond tool, controls the rotation angle of the artificial diamond tool and the amount of movement of the wire in the axial direction while maintaining the set wire angle, and processes a predetermined lead edge shape. This is a lead processing method for the outer diameter portion and the shape portion of the artificial diamond tool to be used. Therefore, it is a method of attaching the PCD chip to the kerf that forms an angle in the axial direction and the radial direction, and processing the lead edge shape, so that the load on the cutting edge on the processing side can be reduced, or problems such as abrasion are solved. There is a feature that it is possible and that a highly accurate lead edge shape can be secured.
[0024]
The invention according to claim 2 is a method for lead processing of an outer diameter portion and a shape portion of an artificial diamond tool having a configuration in which an angle of a wire is maintained at a taper angle along a second angle of a cutting edge shape portion. Therefore, it is possible to provide an optimal method of attaching a PCD chip to a cutting groove formed at an angle in the axial direction and the radial direction of the blade portion main body and processing a lead edge.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of a PCD tool material of the present invention. FIG. 2 is a schematic scale diagram in which the PCD tool material of the present invention is mounted on both centers or a collet chuck of an oil-based wire discharge machine. FIG. 4 is a schematic front view of a main part illustrating a processing rotation angle of a PCD tool material. FIG. 4 is a schematic front view of a main part illustrating a radial correction amount of a PCD tool material of the present invention. FIG. 5 is a main part of a PCD tool of the present invention. Side view [Fig. 6] Side view of main part of conventional PCD tool material [Description of reference numerals]
1 Cut groove 2 PCD tool material 3 PCD
4 Both center or collet chucks 10 Start point 20 End point 30 Wire 40 Radial correction amount 50 Position 60 PCD tool A Step W Working rotation angle

Claims (2)

After setting an artificial diamond tool composed of a kerf provided at an angle in the axial direction and / or the radial direction, and a synthetic diamond cutting blade attached to the tip of the kerf, in a wire processing machine, Measure the mounting error of the cutting edge of the artificial diamond tool, input the numerical value of this error to the control unit, arithmetically process this numerical value, based on the processed numerical value, the wire angle of the wire processing machine, The rotation angle of the artificial diamond tool is set, and while maintaining the set angle of the wire, the rotation angle of the artificial diamond tool and the amount of movement of the wire in the axial direction are controlled to process a predetermined lead edge shape. A lead machining method for an outer diameter portion and a shape portion of an artificial diamond tool. 2. The lead machining method for an outer diameter portion and a shape portion of an artificial diamond tool according to claim 1, wherein the angle of the wire is maintained at a taper angle along the second angle of the cutting edge shape portion.

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