JP2000153441A - Balance type trimming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform high accurate grinding work by simple equipment without being influenced by a cut object, even when it has dispersion in thickness, distortion, etc., so as to enhance durability of use of a cutting tool. SOLUTION: A balance bar 10 of which the halfway in the longitudinal direction is supported by a bearing on a support point 11 with its axis swingable is provided, a cutting tool 12 is provided on one end side of the balance bar 10, and a weight 13 is provided on the other end side. A cutting load by the cutting tool 12 abutting to a surface of a cut object 1 to apply cutting work is set by weight balance with the weight 13. Further, this set cutting load is fixedly maintained by a swing of the balance bar 10 in accordance with the cutting tool 12 abutting to the surface of the cut object 1, to constitute a balance type trimming device capable of cutting the surface of the cut object 1 by the cutting tool 12 sliding along the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a trimming apparatus for performing a cutting process by bringing a cutting tool into contact with a surface of a workpiece.

[0002]

2. Description of the Related Art As an example of an LC composite component as an object to be cut, as shown in FIGS. 2A and 2B, a ceramic substrate 1b provided with an internal electrode 1a is used as a base and an upper electrode 1c is used as a ceramic substrate 1b. The capacitor substrate 1 is provided on a plate surface, and a plurality of coils 2 are mounted on the plate surface of the capacitor substrate 1.

In such an LC composite component, the desired electrical characteristics cannot be obtained in many cases due to characteristic variations in the capacitor substrate 1 and the coil 2. For this reason, the electrical characteristics of the LC composite component have been adjusted by shaving off the upper electrode 1c of the capacitor substrate 1 and changing the capacitor capacity.

Conventionally, the cutting process of the upper electrode 1c has
As shown in FIG. 3, the LC composite component (only the capacitor substrate 1 is shown in the drawing) is placed on the holder 3 and moved in the horizontal direction, while the rotary grindstone 4a is operated by the rotary drive unit 4b. The capacitor substrate 1 is maintained at a predetermined height.
A trimming device that cuts the upper electrode 1c by contacting the upper electrode 1c is used.

In the trimming apparatus, since the capacitor substrate 1 is moved in the horizontal direction while maintaining the rotating grindstone 4a at a predetermined height position, if there is a thickness error or distortion of the capacitor substrate 1, the cutting depth may be reduced. It is inevitable that the variations will occur.

In particular, a thickness error of about 0.1 mm may occur in the capacitor substrate 1 and the internal electrodes 10
And the upper electrode 1c has an interlayer size of 40 to 50 μm, which is smaller than the thickness error. In this case, as shown in FIG. 4, the rotating whetstone 4a is maintained at a predetermined height position and the upper electrode 1
Cutting c may damage even the internal electrode 1a, resulting in deterioration of electrical characteristics and deterioration of reliability due to a change with time, or the capacitor substrate 1 may be broken.

In order to avoid this, conventionally, for each lot,
The height position of the rotary grindstone is adjusted according to the thickness of the capacitor substrate, but this requires time and labor for the work.
Further, even if the above-described problem does not occur, the load caused by cutting the excess thickness in accordance with the variation in the thickness of the capacitor substrate is not preferable because the rotating grindstone is significantly consumed.

[0008]

SUMMARY OF THE INVENTION According to the present invention, it is possible to carry out high-precision grinding with simple equipment without being affected by variations in thickness, distortion, etc., even in a workpiece, and the durability of a cutting tool. It is an object of the present invention to provide a balance type trimming device capable of improving the operability.

[0009]

According to a first aspect of the present invention, there is provided a balance-type trimming apparatus, comprising: a balance bar having a shaft supported by a shaft so as to be swingable about a longitudinal middle.
A cutting tool is provided on one end of this balance bar,
The other end is equipped with a weight, and the cutting load of the cutting tool that performs cutting by making contact with the surface of the workpiece is set according to the weight balance with the weight, and the set cutting load is set to the workpiece. It is configured as a balance type that can be kept constant by the swinging of the balance bar according to the cutting tool in contact with the surface of the workpiece, and can be cut by the cutting tool that slides along the surface of the workpiece.

The balance-type trimming device according to the second aspect of the present invention is configured such that a weight is provided so as to be position-adjustable along the longitudinal direction on the axis of the balance bar.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, this embodiment will be described. This embodiment uses a ceramic substrate 1b provided with an internal electrode 1a as a base and a top electrode 1c formed on a ceramic substrate 1b. A trimming device suitable for forming a capacitor substrate 1 on a surface thereof, and an LC composite component or the like obtained by mounting a plurality of coils (not shown) on the plate surface of the ceramic substrate 1 as a workpiece. It is configured.

The trimming device mainly comprises a balance bar 10 having a predetermined axial length. The balance bar 10 is located in the horizontal direction, and the middle of the longitudinal direction is pivotally attached to a body frame (not shown) or the like by a support shaft. Alternatively, it is supported by a bearing so that it can swing to the left.

The balance bar 10 is a main component, and a cutting tool 12 is provided on one shaft end side, and a weight 1 is provided on the other shaft end side.
3 is provided. As the cutting tool 12,
A cutting machine that operates the rotary grindstone 12a by the rotation drive unit 12b is provided. The cutting machine is provided integrally with the balance bar 10 by fixing the rotation drive unit 12b to the shaft end of the balance bar 10 with the rotary grindstone 12a facing downward.

A weight 13 is slidably fitted on the axis of the balance bar 10 and a tightening screw of the balance bar 10 is attached.
(Not shown) can be screwed or unscrewed from the weight 13 so as to be adjustable on the axis of the balance bar 10 along the longitudinal direction. The weight 13 can also be provided so that its position can be adjusted by forming the axis of the balance bar 10 as a screw shaft and screwing the weight 13 with the screw shaft.

The trimming apparatus thus configured is configured to transport the capacitor substrate 1 on the holder 14 while transporting the same.
The rotating grindstone 12a can be brought into contact with the upper electrode 1c of the capacitor substrate 1 from above to perform cutting.

At the time of the cutting process, the cutting load by the cutting tool 12 which makes contact with the upper electrode 1c of the capacitor substrate 1 and performs the cutting process is set by the weight balance with the weight 13. That is, the weight 13 is put on the cutting tool 1 on the axis of the balance bar 10.
If the position is adjusted in a direction away from 2, the cutting load by the cutting tool 12 is reduced, while the weight 13 is set to a large value by adjusting the cutting load by the cutting tool 12 in the direction close to the cutting tool 12 on the axis of the balance bar 10. it can.

The cutting load of the cutting tool 12 is
Therefore, the height position of the rotary grindstone 12a with respect to the capacitor substrate 1 can be determined. For this reason, it is possible to perform cutting with high precision on the capacitor substrate 1 having a certain thickness at a cutting depth corresponding to the set cutting load. When cutting the upper electrode 1c of the capacitor substrate 1, when the cutting depth is set to 40 μm, the load of the cutting tool 12 may be set to about 40 to 80 g.

At the same time, the cutting load by the cutting tool 12 set as described above can be kept constant by the swinging of the balance bar 10 according to the rotating grindstone 12a in contact with the surface of the capacitor substrate 1. That is, even if the thickness of the ceramic substrate 1 varies or is distorted, the balance bar 10 swings via the rotating grindstone 12a abutting on the plate surface of the ceramic substrate 1, and the height position of the rotating grindstone 12a is adjusted. The cutting load can be kept constant because it can be changed.

For example, in a case where the thickness is larger than the initially set capacitor substrate 1 in which the cutting load is determined, the rotating bar 12a comes into contact with the upper electrode 1c of the capacitor substrate 1 and the balance bar 10 Since the swinging operation is performed so as to lower the equipment side, the upper electrode 1c of the capacitor substrate 1 can be cut at a predetermined cutting depth while keeping the cutting load by the cutting tool 12 constant.

Conversely, when the thickness of the capacitor substrate 1 is thinner than the initially set capacitor substrate 1, the balance bar 10 swings to lower the equipment side of the cutting tool 12, so that in any case, High-precision cutting can be performed by the cutting load of the rotating grindstone 12a that slides along the surface.

In this balance type trimming device,
Immediately below both sides of the fulcrum 11 via the fulcrum 11 of the balance bar 10, stoppers 15a and 15b for regulating the lower limit of swing of the balance bar 10 can be provided. These stoppers 15a, 15b
Can be used to support the balance bar 10 in a horizontal state while the capacitor substrate 1 is placed on the holder 14 and is sequentially fed or fed immediately below the rotary grindstone 12a.

Although the above-described embodiment has been described based on the case where the upper electrode 1c of the capacitor substrate 1 constituting the LC composite component is cut, other processes such as cutting a trimming electrode of a normal capacitor may be used. Can also be used. Further, as the cutting tool 12, instead of the rotary grindstone 12a, a tool provided with a tool such as a cutter in accordance with an object to be cut can be provided.

[0023]

As described above, according to the balance-type trimming device according to the first aspect of the present invention, since the cutting load by the cutting tool is set by the weight balance with the weight, the cut having a constant thickness can be obtained. An object can be cut with high precision at a cutting depth corresponding to the set cutting load.

At the same time, when the cutting tool comes into contact with the surface of the object to be cut, the cutting load can be kept constant by swinging the balance bar. Even if there is a cutting tool that slides along the surface of the workpiece, the workpiece can be cut at a predetermined cutting depth, and unnecessary cutting of the thickness is not required. Durability can also be increased.

According to the balance-type trimming device according to the second aspect of the present invention, the weight is provided so as to be position-adjustable in the longitudinal direction on the axis of the balance bar, so that the weight balance between the cutting tool and the weight can be maintained. Since it can be easily set and the cutting load of the rotary grindstone on the object to be cut can be accurately determined, cutting can be performed with high precision at a cutting depth corresponding to the set cutting load.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a balance-type trimming device according to the present invention.

FIG. 2a is a side view showing an LC composite component as a workpiece according to a general example.

FIG. 2b is a plan view showing the LC composite component of FIG. 2a.

FIG. 3 is an explanatory diagram showing a conventional trimming device.

FIG. 4 is an explanatory diagram showing a problem of a conventional trimming device.

[Description of Signs] 1 Workpiece 10 Balance bar 11 Support bar of balance bar 12 Cutting tool 13 Weight

Claims (2)

[Claims] 1. A balance bar having an axis line swingably supported on a fulcrum centered in the longitudinal direction, a cutting tool is provided on one end of the balance bar, and a weight is provided on the other end of the balance bar. The cutting load by the cutting tool that performs cutting by contacting the surface of the cutting object is set by the weight balance with the weight, and the set cutting load is set according to the cutting tool that contacts the surface of the workpiece. A balance-type trimming device, wherein the balance-type trimming device is configured to be maintained constant by swinging a balance bar, and configured to be capable of cutting the surface of the workpiece with a cutting tool that slides along the surface. 2. The balance-type trimming device according to claim 1, wherein the weight is provided so as to be position-adjustable in the longitudinal direction on the axis of the balance bar.