JPH08174505A - Method and apparatus for chamfering - Google Patents

Abstract

PURPOSE: To provide a method and an apparatus for chamfering to carry out a chamfering in an instructed value irrespective of dispersion in a surface height of a work caused by warp and strain of the work, or dispersion in a pallet height. CONSTITUTION: When a work is chamfered with a chamfering tool 11, after detecting a surface position of the work with a work surface positioning sensor 33, the work is chamfered by an instructed value preliminarily instructed with the chamfering tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering method and apparatus for chamfering a work.

[0002]

2. Description of the Related Art Conventionally, when chamfering a work, the chamfering amount of a chamfering drill is input to an NC device according to the plate thickness and hole diameter of the work to obtain a predetermined chamfering dimension and then chamfer the work. We are processing.

[0003]

By the way, in many cases, a predetermined chamfered dimension cannot be obtained due to the warp of the work and the variation of the height of the pallet on which the work is placed. Therefore, it is a big problem in chamfering, especially when the work is a thin plate. If the chamfering is too large, tapping in the subsequent process shortens the threaded portion and causes a problem such that the fastening force by a bolt or the like cannot be obtained.

An object of the present invention is to provide a chamfering method and an apparatus thereof capable of performing chamfering according to a command value regardless of variations in workpiece surface height due to variations in workpiece warpage, distortion or pallet height. To do.

[0005]

In order to achieve the above object, the chamfering method of the invention according to claim 1 detects the surface position of the work by the sensor for position of the work surface when chamfering the work with the chamfering tool. After that, the work is chamfered by the chamfering tool according to a command value given in advance.

A chamfering device of the invention according to claim 2 is
It is characterized in that a holder holding a rotatable and reciprocating chamfering tool is provided with a work surface position sensor for detecting a work surface position.

The chamfering apparatus of the invention according to claim 3 is
The chamfering apparatus according to claim 2, wherein the holder is provided with a detection main body, a detection member is provided on the outer periphery of the chamfering tool at the lower end of the detection main body, and the work surface that works when the detection member comes into contact with the surface of the work. A position sensor is provided on the detection body.

[0008]

With the chamfering method and the apparatus therefor according to claims 1 to 3, when the holder holding the chamfering tool is moved toward the surface of the work, the detection member comes into contact with the surface of the work. . As a result, the work surface position sensor provided in the detection body operates to detect the work surface position.

Based on the detection of the surface position of this work,
The chamfering tool is rotated in accordance with a command value that has been commanded in advance, and the chamfering process is performed on the work by inserting the chamfering tool.

Therefore, the chamfering according to the command value is performed regardless of the variation of the surface height of the workpiece due to the warp or distortion of the workpiece or the variation of the height of the pallet.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 1, there is provided a turret body 1 which is partially omitted and which can be rotated and split freely and vertically movable, and a supporting member 3 is integrated on one of a plurality of surfaces of the turret body 1. A holder 7 is attached to the support member 3 via a bearing retainer 5. A rotatable spindle 9 is attached to the holder 7,
A chamfering drill 11 as a chamfering tool is replaceably provided at the lower portion of the spindle 9.

With the above structure, the chamfering drill 11 is vertically moved through the holder 7 and the spindle 9 by vertically moving the turret body 1 by a drive source (not shown). Further, the chamfering drill 11 is rotated by rotating the spindle 9 by a drive source (not shown).
Will be rotated.

At the lower part of the support member 3, for example, a hollow cylindrical detection main body 13 with a step is provided in a state of protruding downward. The inner and outer circumferences of the detection body 13 are provided with a first spring 15 and a second spring 1 urged downward.
First slide 19 and second slide 21 through 5, 17
Is provided. The upper part of the first spring 15 is pressed against the detection body 13 by a spring presser 23.

A detection pin 25 as a plurality of detection members is provided downward in the lower portion of the first slide 19 while surrounding the chamfering drill 11. A dog pin 27 extending in the left-right direction is attached to the notch groove 13V formed in the detection body 13 and the elongated hole 21H formed in the second slide 21 on the right side in FIG. The rear end of 27 is attached to the first slide 19 with a screw 27 from the inside of the first slide 19, and the tip of the dog pin 27 is attached to the second slide 2.
It is projected to the right from 1. A support block 29 is integrated with the second slide 21, and a high-precision switch 33 as a workpiece surface position sensor is provided on the support block 29 so as to be adjustable in height. There is.

With the above configuration, the operation will be described based on the operation state of FIG. 2 and the flow chart shown in FIG. 3. After the initial point positioning is performed as shown in FIG. In step S2, the turret body 1 is lowered. The lower end of the detection member 25 as shown in FIG. 2 (B) is in contact with the surface of the workpiece W brought previously formed drill hole W _H, it pushes up the first slide 19 and Dogupin 27. It is determined whether or not the dog pin 27 pushed up in step S3 contacts the high precision switch 33 and the high precision switch 33 is turned on.

When the high-accuracy switch 33 is turned on, the coordinate values are stored in step S4, and then the thrust amount of the chamfering drill 11 is calculated in step S5. Based on the calculated plunge amount, when the chamfering drill 11 is rotated and the turret body 1 is lowered in step S6 as shown in FIG. 2C, the first and second slides 19, 2 are moved.
1 is pushed up against the biasing forces of the first and second springs 15 and 17, and the work W is chamfered. When the chamfering process is completed, the turret body 1 is processed in step S7.
Rises to its original position, returns to the state shown in FIG. 2 (A), and ends one cycle.

Therefore, the surface position of the work W is detected by the high-precision switch 33, and the amount of protrusion of the chamfering drill 11 is automatically calculated to perform the chamfering work. The chamfering according to the command value can be performed regardless of the variation of the work surface height due to the variation of the height.

By integrating the high-precision switch 33 with the holder 7 holding the chamfering drill 11, the surface position of the workpiece W and the chamfering can be performed in one step. Can be shortened.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. In the present embodiment, an example in which a round hole is formed in the work W has been described, but as shown in FIG.
The chamfering drill 11 may be used to chamfer the large-diameter hole 35, the deformed hole 37, and the outer shape end surface 39 as shown in FIGS. Further, although the detection pin 25 is described as an example of the detection member in the present embodiment,
It may be a cylindrical detection cylinder. Furthermore, the first and second
Instead of the springs 15 and 17, for example, an air cylinder or an air damper may be used.

When the first and second springs 15 and 17 are limited to chamfering in the downward direction, the first and second slides 19 and 21 are pressed downward by their own weight.
There is no functional problem even if the first and second springs 15 and 17 are removed.

[0022]

As can be understood from the above description of the embodiments, according to the inventions of claims 1 and 2, after the surface position of the work is detected by the work surface position sensor, the chamfering tool is used. Since the chamfering process is performed, the chamfering process can be performed according to the command value regardless of the variation in the work surface height due to the warp, strain, or variation in pallet height of the work.

According to the inventions of claims 2 and 3,
Since the chamfering tool and the workpiece surface position sensor are integrated, the surface position of the workpiece and the chamfering process can be performed in one step, so that the detection time and the chamfering time can be shortened.

[Brief description of drawings]

FIG. 1 is a front view of a chamfering apparatus according to an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of performing chamfering processing on a work.

FIG. 3 is a flowchart illustrating a chamfering operation.

FIG. 4 is a view showing hole states of various works to be chamfered by a chamfering drill.

[Explanation of symbols]

 1 Turret body 7 Holder 11 Chamfering drill (chamfering tool) 13 Detection body 15, 17 1st, 2nd spring 19, 21 1st, 2nd slide 25 Detection pin (detection member) 27 Dog pin 33 High precision switch (work surface position) Sensor)

Claims (3)

[Claims] 1. When chamfering a workpiece with a chamfering tool, the chamfering tool performs chamfering with the chamfering tool according to a command value previously given after the workpiece surface position is detected by a workpiece surface position sensor. And chamfering method. 2. A chamfering device comprising a holder for holding a rotatable and reciprocating chamfering tool, and a work surface position sensor for detecting a work surface position. 3. A workpiece main body position sensor is provided on the holder, a detection member is provided on the outer periphery of the chamfering tool at the lower end of the detection main body, and the workpiece surface position sensor is actuated when the detection member comes into contact with the surface of the workpiece. The chamfering device according to claim 2, wherein the chamfering device is provided in the detection main body.