JP4860168B2 - Chamfering equipment - Google Patents

Description

The present invention, for example, for a homogeneous industrial product (hereinafter referred to as a workpiece) processed by a machine tool, a workpiece manufactured by a method such as die casting, injection molding, press punching, lost wax casting, die forging, etc. For example, the present invention relates to a chamfering apparatus that performs chamfering , and more particularly, to a device that is devised so that a desired chamfering process can be easily applied to a thin-walled part while following its shape with a stylus.

For example, as a workpiece manufactured by a method such as machining with a machine tool, die casting, injection molding, press punching, lost wax casting, die forging, or the like, there is a workpiece as shown in FIG. The workpiece 201 shown in FIG. 8 has a relatively complicated shape in which the two-dimensional contour is connected by a straight line and a curved line. The workpiece 201 has a flange shape, and a through hole 203 through which a shaft (not shown) passes is formed at the center, and through holes 205 through which fastening bolts (not shown) pass are formed at four corners. . An annular recess 207 is formed on the outer periphery of the through hole 203. The annular recess 207 has a plurality of protrusions 209 protruding from a plurality of locations. The workpiece 201 having such a configuration is fastened and fixed together with another workpiece (not shown) to be completed as a predetermined device.

By the way, in the case of the workpiece 201 as shown in FIG. 8, high dimensional accuracy is required for the pitches (P ₁ ), (P ₂ ), etc. between the through holes 205, 205. The dimensional accuracy is not so important. On the other hand, in the manufacturing process, so-called “burrs” occur at the outer peripheral edge. In order to finish the workpiece 201, it is necessary to remove such “burrs”.

Further, it is necessary to perform chamfering in accordance with the contour shape of the workpiece 201, and it is necessary to finish the end surface of the workpiece 201 with a certain machining surface accuracy. When performing only deburring, it is sufficient to use a flexible tool such as a brushing wheel or wire wheel. In some cases, a cutting tool such as an end mill, a rotary bar, or a chamfer cutter is used.

There are various types of cutting devices that perform finishing using the cutting tool. However, all of the conventional devices of this type move cutting tools based on trajectory information set in advance based on model workpieces, etc. Therefore, when there is a variation in the contour shape of the workpiece (which has a variation with respect to the contour shape of the model workpiece), a variation occurs in the cutting depth. Therefore, depending on the location, there is a problem that the cutting depth is too deep and the chamfer width becomes larger than necessary, or the tool is damaged depending on the location.

Another problem is that it is difficult to input and store the trajectory information in advance. That is, when inputting trajectory information, first, it is necessary to set a large number of programming points along the contour shape of the model work, and to set the coordinate values of those programming points. The value is input and stored using the teaching box. These operations are by no means easy and require a lot of labor and a long working time.

Therefore, the present applicant of the present patent proposes an invention called “following processing apparatus”. The details are disclosed in Patent Document 1.

Japanese Patent Laid-Open No. 5-200655

However, the following machining apparatus described in Patent Document 1 is configured to detect the pressing force when the machining tool is brought into pressure contact with the workpiece by the load sensor, and the overall configuration is simplified and the operation is easy. However, there is a problem in that the configuration for the program control by the servo motor based on the detection value of the load sensor is complicated, which causes the apparatus to be expensive.
Therefore, the present patent applicant has proposed a “processing apparatus” that performs desired processing without requiring such an expensive apparatus or complicated control. Patent Document 2 discloses this.

JP 10-193239 A

In addition, there are, for example, Patent Document 3 and Patent Document 4 that disclose similar types of processing apparatuses.

Japanese Patent Laid-Open No. 11-165242 JP 11-197930 A

The conventional configuration has the following problems. That is, in the case of the above machining apparatus, the shape of the workpiece rotated by the stylus as the copying means is copied, and thereby a desired part of the workpiece is moved by the rotary tool while moving the head portion on which the machining tool unit is mounted. The chamfering process is performed. However, when the part to be chamfered is thin, the part to be chamfered by the stylus is close to the part to be chamfered. There was something I couldn't do. That is, it is difficult to place the rotary tool and the stylus close to each other in a narrow space. In that case, machining by conventional program control is performed.

The present invention has been made on the basis of the above points. The object of the present invention is to provide a tool that follows the shape of a workpiece with a stylus even if the portion to be chamfered is thin and narrow. It is an object of the present invention to provide a chamfering apparatus capable of performing a desired chamfering process.

In order to achieve the above object, a chamfering apparatus according to claim 1 of the present invention comprises a base, a work holding / rotating means provided on the base for rotating the work while holding the work, and the work provided on the base. A machining tool unit that is configured to be movable back and forth in the direction toward the surface and that is provided with a spindle so as to be rotatable, and is detachably attached to the tip of the spindle of the machining tool unit. a cutting tip of the triangle a thin-walled abutting in a tilted state Te, the processing tool unit mounted coaxially to the lower end of the spindle in proximity to the cutting tip above have mimic the shape of the workpiece a stylus for regulating the chamfering amount by cutting the chip to a predetermined amount, was provided, more than half the length worth the scan of one side of the triangle to one of the corners of the cutting tip It is characterized in that so as to close along the position copying by cutting position and the stylus according to the cutting tip in the axial direction by cutting into the inside of the illustrations.
According to a second aspect of the present invention, there is provided a chamfering apparatus according to the first aspect, wherein a plurality of the cutting tips are attached.
According to a third aspect of the present invention, in the chamfering apparatus according to the first aspect, the stylus is of a bearing type.

As described in detail above, according to the processing apparatus of the present invention, the base, the work holding / rotating means provided on the base for holding and rotating the work, and the base provided in the direction toward the work. A machining tool unit that is configured to be able to advance and retreat and has a spindle that is rotatable, a cutting tip attached to the tip of the spindle of the machining tool unit, and the cutting tip at the lower end of the spindle of the machining tool unit Since the stylus is mounted coaxially in a state close to the stylus and imitates the shape of the workpiece, the cutting tip can be easily attached and fixed at an arbitrary position close to the stylus. For example, even if the workpiece is thin and the part to be machined by the stylus is close to the part to be machined, the cutting tip and the stylus can be placed close to each other to perform the desired machining. become.

Also, when the cutting tip and the stylus are arranged for partial polymerization in the axial direction, thereby making the cutting position by the cutting tip and the copying position by the stylus close along the axial direction. The above-mentioned effect can be made more reliable.
Further, when the cutting tip is detachably attached to the spindle, even if the cutting tip is worn out due to aging, it can be appropriately replaced.
In addition, when the cutting tip is formed in a polygonal shape and can be cut on any surface, it can be processed using a plurality of locations by appropriately adjusting the mounting angle of the cutting tip. It is.
It is also conceivable that the cutting tips are attached to a plurality of locations.
In addition, when the stylus is a bearing type, a smooth copying operation is possible.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a configuration of a chamfering apparatus as a processing apparatus. First, there is a base 1. Four moving casters 2 and stoppers 4 (only two are shown in FIG. 1) are attached to the bottom surface of the base 1. A work holding / rotating means 3 is installed on the base 1. The work holding / rotating means 3 is configured to rotate a work gripper 7 by a drive motor 5. The workpiece 9 is held by the workpiece gripper 7.

  A coolant tray 10 is installed above the base 1 and on the outer peripheral side of the work holding / rotating means 3. A coolant pipe (not shown) is installed at the inner peripheral upper end portion of the coolant tray 10, and coolant oil is jetted from a plurality of coolant jet holes provided in the coolant pipe to the machining site.

  A base portion 11 is installed on the base 1, and a Y-direction slide base 13 is movable on the base portion 11 in the left-right direction (Y direction) in FIG. 1 via a Y-direction guide mechanism 15. It is installed. The Y-direction guide mechanism 15 is a pair of rails 17 and 17 (only one side is shown in FIG. 1) laid on the base portion 11 side and moves to the rails 17 and 17 provided on the Y-direction slide base 13 side. The guide members 19 are engaged with each other. As shown in FIG. 3, two guide members 19 are provided for each rail 17.

  A pressing means 21 is installed on the base portion 11. The pressing means 21 includes a rotating body 23 attached to the base portion 11 side, a rotating body 25 attached to the slide base 13 side, and these rotating bodies 23 and 25 wound around one end of the slide base 13. The string body 27 is connected to the other end of the string body 27, and the weight 29 is connected to the other end of the string body 27. The slide table 13 is constantly urged toward the workpiece 9 by the pressing means 21 having the above configuration.

  A processing tool unit 31 is attached to the front side of the slide table 13 (left side in FIG. 1) so as to be movable in the vertical direction (Z direction) in FIG. The machining tool unit 31 includes a drive motor 33, and the spindle 35 is driven to rotate by the drive motor 33. The machining tool unit 31 is configured to be movable in the vertical direction (Z direction) in FIG. 1 via a Z direction guide mechanism (not shown). That is, when the operation handle 37 is rotated, the processing tool unit 31 is shown in FIG. 1 via the ball screw 39, a ball nut (not shown) fixed to the Z-direction slide base 32 of the processing tool unit 31, and the Z-direction guide mechanism. It moves in the middle up / down direction (Z direction). The processing tool unit 31 is covered with a cover 40.

As shown in FIG. 2, an operation panel 42 is installed on the side of the cover 40. A signal tower 44 is erected on the rear side of the operation panel 42.

Further, as shown in FIG. 4, two cutting tips 41 and 41 are detachably attached to the tip of the spindle 35 at positions separated by 180 °. The cutting tip 41 is thin and has a triangular shape, and is attached and fixed to a predetermined position of the spindle 35 by a fixing screw member 43 in a detachable manner. The cutting tip 41 is provided with a cutting portion 41a on each of three surfaces. For example, when a cutting portion 41a on one surface side is consumed due to secular change, one of the other two cutting surfaces 41a is selected.・ Use it. And after using all the cutting parts 41a, it will replace | exchange for the chip | tip 41 for a new cutting.
It should be noted that the number of cutting tips 41 attached to the tip of the spindle 35 may be arbitrarily set, and one, two, or three or more as in this embodiment is also assumed.

A stylus 51 is attached to the lower end of the spindle 35. This stylus 51 is a bearing type,
An inner ring member 53, an outer ring member 55, a plurality of balls 57 interposed between the inner ring member 53 and the outer ring member 55, and a ring-shaped member 56 attached to the outer peripheral side of the outer ring member 55. It is configured. The inner ring member 53 is attached and fixed to the front end surface of the spindle 35 by a fixing screw member 59.

The relationship between the cutting tip 41 and the stylus 51 will be described in detail. The cutting tip 41 and the stylus 51 are arranged so that a predetermined chamfering process can be performed on the thin portion of the workpiece 9 while following the same. That is, in the case of this embodiment, the corner portion of the flange portion 9a of the workpiece 9 is chamfered. However, since the flange portion 9a is thin, the stylus 51 and It is necessary to place a processing tool.

  Therefore, by using the cutting tip 41 and the stylus 51 having the above-described configuration, a predetermined chamfering process can be performed following the outer shape of the workpiece 9 even in such a small thickness dimension. That is, by selecting and setting the shape and attachment position of the cutting tip 41 as appropriate, it is possible to arrange the cutting tip 41 close to the stylus 51.

More specifically, the cutting tip 41 has a triangular shape, and one corner portion facing downward is disposed so as to be partially inserted inside the ring-shaped member 56. As a result, the cutting position by the cutting portion 41a of the cutting tip 41 and the copying position by the ring-shaped member 56 are close to each other in the axial direction. As a result, the desired chamfering can be performed even on the thin flange portion 9a.
Incidentally, when the rotary tool is coaxially attached to the lower end of the spindle 35, there is a limit to narrowing the interval between the cutting portion of the rotary tool and the stylus.

The operation will be described based on the above configuration.
First, the work 9 is held by the work gripper 7 of the work holding / rotating means 3. Then, the drive motor 5 is driven to rotate the work gripper 7. On the other hand, the Y-direction slide base 13 is urged toward the workpiece 9 by the pressing means 21. As a result, the cutting tip 41 and the outer ring member 55 of the stylus 51 are pressed against a predetermined portion of the flange portion 9 a of the workpiece 9. The spindle 35 to which the cutting tip 41 and the stylus 51 are attached is rotated by a drive motor 33.

Then, when the workpiece 9 rotates, the outer shape of the flange portion 9a is copied by the stylus 51, whereby the head portion 13 advances and retreats in the Y direction. At that time, a predetermined chamfering process is performed on the corner portion of the thin flange portion 9 a of the workpiece 9 by the cutting tip 41.
Hereinafter, similar processing is executed while the workpiece 9 is appropriately replaced.

As described above, according to the present embodiment, the following effects can be obtained.
First, a predetermined chamfering process can be performed on the thin flange portion 9a of the work 9 while accurately following the outer shape. This is because the cutting tip 41 has a triangular shape and is arranged so that one corner facing downward is partially inserted into the inside of the ring-shaped member 56, whereby the cutting portion of the cutting tip 41 is arranged. This is because the cutting position by 41a and the copying position by the ring-shaped member 56 are close to each other in the axial direction.
The stylus 51 is of a bearing type. Therefore, the upper end portion of the outer ring member 55 is slightly in contact with a predetermined portion of the work 9, but a stable copying operation can be performed. Is.
Further, the cutting tip 41 is detachably attached to the spindle 35, so that operations such as changing the cutting part and exchanging the cutting tip can be easily performed.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of the second embodiment, the configuration of the stylus is slightly different from that in the case of the first embodiment.
That is, the stylus 71 in the second embodiment is also a bearing type,
The inner ring member 73, the outer ring member 75, a plurality of balls 77 interposed between the inner ring member 73 and the outer ring member 75, and a ring-shaped member 79 attached to the outer ring member 75. Yes. The inner ring member 73 is attached and fixed to the front end surface of the spindle 35 by a fixing screw member 79, a washer 81, and a pressing member 83.
Further, the outer peripheral portion of the ring-shaped member 79 is further extended upward, and the corner portion of the cutting tip 41 is more difficult to be inside.
Other configurations are the same as those of the first embodiment, and the same portions are denoted by the same reference numerals and description thereof is omitted.
Therefore, the same effect as in the case of the first embodiment can be obtained, and the cutting position by the cutting portion 41a of the cutting tip 41 and the copying position by the ring-shaped member 79 are brought closer to the axial direction, Thereby, it is possible to effectively cope with the thin-walled member.

Next, a third embodiment of the present invention will be described with reference to FIG. In the case of the first and second embodiments, the case where there are two cutting tips 41 has been described as an example, but in the case of this third embodiment, the number of cutting tips 41 is The number is four. In addition, the configuration of the stylus is slightly changed. That is, the stylus 81 includes a roller 83 and an attachment screw member 85 that rotatably attaches the roller 83. Since other configurations are the same as those of the first and second embodiments, the same portions are denoted by the same reference numerals and description thereof is omitted.
Even with such a configuration, the same effects as those of the first and second embodiments can be obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In the case of the fourth embodiment, two cutting tips 41 are provided, and the stylus has the same configuration as that of the third embodiment. The same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.
Even if it is such a structure, there can exist an effect similar to the said 1st thru | or 3rd embodiment.

The present invention is not limited to the first to fourth embodiments.
First, the shape of the cutting tip is assumed to have various shapes other than the triangle.
In addition to the bearing type, various configurations can be considered as the stylus configuration.

The present invention, for example, for a homogeneous industrial product (hereinafter referred to as a workpiece) processed by a machine tool, a workpiece manufactured by a method such as die casting, injection molding, press punching, lost wax casting, die forging, etc. For example, it relates to a chamfering device that performs chamfering, and in particular, a device that is devised so that a desired chamfering process can be easily applied to a thin-walled part while following its shape with a stylus. It is suitable as a chamfering device for a workpiece having a thin flange portion.

It is a figure which shows the 1st Embodiment of this invention, and is a side view which notches and shows the structure of a chamfering apparatus partially. It is a figure which shows the 1st Embodiment of this invention and is a front view which shows the structure of a chamfering apparatus. It is a figure which shows the 1st Embodiment of this invention and is a top view of a chamfering apparatus. It is a figure which shows the 1st Embodiment of this invention, and is a figure which expands and shows the IV section of FIG. It is a figure which shows the 2nd Embodiment of this invention, and is a front view which partially cuts off and shows the structure of the part of a cutting tip and a stylus. 6A and 6B are views showing a third embodiment of the present invention, in which FIG. 6A is a plan view showing a configuration of a cutting tip and a stylus part, and FIG. 6B is a configuration of a cutting tip and a stylus part. FIG. 6C is a bottom view showing a configuration of a cutting tip and a stylus part. FIGS. 7A and 7B are views showing a fourth embodiment of the present invention, FIG. 7A is a plan view showing a configuration of a cutting tip and a stylus part, and FIG. 7B is a configuration of a cutting tip and a stylus part. FIG. 7C is a bottom view showing a configuration of a cutting tip and a stylus part. It is the figure used for description of a prior art example, and is a top view which shows the shape of a workpiece | work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 3 Work holding | maintenance means 7 Work gripper 9 Work 11 Base part 13 Y direction slide base 15 Y direction guide mechanism 21 Pressing means 31 Processing tool unit 35 Spindle 41 Cutting tip 41a Cutting part 51 Stylus 53 Inner ring member 55 Outer ring 57 balls

Claims (3)

The base,
A workpiece holding / rotating means provided on the base for holding and rotating the workpiece;
A machining tool unit that is provided on the base and is configured to be movable forward and backward in a direction toward the workpiece, and is provided with a spindle rotatably;
A thin and triangular cutting tip that is detachably attached to the tip of the spindle of the processing tool unit, and one side of which is inclined with respect to the corner of the workpiece,
A stylus for regulating a predetermined amount of chamfering amount in close proximity to the cutting tip by mimic have the cutting tip of the shape of the workpiece mounted coaxially to the lower end of the spindle of the machining tool unit,
Comprising
The cutting position by the cutting tip and the copying position by the stylus are brought close to each other in the axial direction by causing one corner of the cutting tip to bite into the inside of the stylus for a length of more than half of one side of the triangle . A chamfering device characterized by that. The chamfering device according to claim 1,
A chamfering device, wherein a plurality of the cutting tips are attached. The chamfering device according to claim 1,
A chamfering device, wherein the stylus is of a bearing type.

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