KR200167001Y1 - A rotating tool, a rotating chamfer tool and a processing facilites - Google Patents

Abstract

The present invention is a rotary tool characterized in that the journal bearing is installed freely rotating on the cutting edge end,

Rotating chamfering tool characterized in that a freely rotated journal bearing is installed at the cutting edge end that has an angle with respect to the tool axis, and a freely rotating journal bearing at the cutting edge. It relates to a processing equipment characterized by chucking the shank portion of a rotary tool, and supporting the main shaft for driving it in a direction perpendicular to the tool axis with elasticity.

Description

Rotary tools, chamfering tools and processing equipment

1 is a cross-sectional view of a rotary tool showing an embodiment of the present invention

2 is a cross-sectional view of the rotary chamfering tool showing an embodiment of the present invention

3 is a perspective view showing the vortex-shaped chamfering state processed using the rotary chamfering tool of the present invention

4 is an explanatory diagram showing a tool and a machining method which is an embodiment of the present invention

5 is a cross-sectional view of a conventional tool

6 is an explanatory diagram when a chamfer imitation processing method is performed by a conventional method with a conventional tool.

* Explanation of symbols for the main parts of the drawings

1: cutting edge 2: shank part

3: journal bearing 4: workpiece

5: Finished surface (side wall) 9: Workpiece

11: machining equipment spindle 12: chuck

15: spring

The present invention relates to a rotary tool, a rotary chamfering tool and a processing equipment.

Fig. 5 shows a cross sectional view of a conventional milling cutter rotating tool, and Fig. 6 shows a copying method using a conventional method with a conventional tool. These tools generally consist of a shank portion 2 fixed to a machine tool and a cutting edge 1 for processing the work piece 4. In the case of forming the chamfers, jars and the like with high precision with the conventional rotary tool as shown in the drawing along the standard finishing surface 5, additional processing is performed while fixing the standard finishing surface on the machined machined machine. Or, it was necessary to fix and process the end-finished workpiece to high precision with other facilities.

Or, in particular, when shaping or chamfering to a shape that follows a complex finishing surface, additional machining is performed once the workpiece is fixed on another facility, or once the workpiece is fixed to another facility with high precision. And a high precision NC controller.

However, in the conventional rotary tool, by the above-described method, for example, the intersection 6 of the upper surface 7 and the side surface 5 of the vortex-shaped wall as shown in FIG. 3 is chamfered. In the case of high precision removal, it is necessary to finish the wall and finish the chamfer without removing the chuck after finishing the wall. It was necessary to increase the size and precision. In addition, there is a method of simultaneously machining the wall and the chamfer by using a tool having a chamfered edge on the wall finishing tool. However, when the required precision is strict, the tool shape is difficult to obtain and the tool shape can be obtained. And therefore it was difficult to obtain high dimensional accuracy. In the case where the chamfering process is performed in another process, it is difficult to obtain a uniform and highly accurate chamfer shape by chucking again, resulting in an angular deviation and a central deviation from the vortex. In order to obtain a consistent and highly accurate chamfered shape, the accuracy of positioning fixation of a workpiece is required, the precision of equipment is required, the mounting time is required, and the cost rises.

Moreover, the conventional construction method requires the processing machine of the control of the high precision NC, and the cost of equipment was high, and it took time for jig design and installation. Moreover, high precision imitation processing to the to-be-processed surface, such as a casting die surface with uneven shape precision, was not possible.

This invention solves the said conventional subject, and an object of this invention is to easily imitate a thing of a complicated shape.

In order to solve the above problems, the present invention chucks the shank portion of the cutting edge of a rotary tool provided with a freely rotatable journal bearing at the tip of the cutting edge, and freely moves the main axis driving the vertical axis to the tool axis. It is elastic and supported. Moreover, the said freely rotatable journal bearing is pressed against a to-be-processed object, and the copying is carried out based on the surface.

Since the cutting edge is moved by the above technical means while pressing the outer edge of the journal bearing provided at the cutting edge end to the workpiece having a complicated shape, the workpiece along the surface of the workpiece having poor shape accuracy and positioning accuracy is also accurate. Good copying can be easily inexpensive. In addition, processing in the case where the dimensional tolerance of the shape along the reference finish surface is strict can be easily and accurately performed.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view of a rotary tool provided with a journal bearing, and in the case of unfolding, FIG. 2 is a cross-sectional view of a rotary chamfering tool provided with a journal bearing.

1 is a tool for preparing the surface 6 in which the workpiece 4 has been cut by a predetermined amount δ with respect to the reference finishing surface 5, and the cylindrical cutting edge 1 is provided at the distal end of the shank portion 2. At the end of the cutting edge 1, there is a boss 8 coaxial with the shank portion 2, and the inner ring of the bowl bearing is inserted and firmly attached to the boss portion 8 so as to freely rotate the journal. The bearing 3 is comprised. With respect to the outer circumferential diameter of the bowl bearing, the cutting edge diameter is increased by the amount corresponding to the set cutting depth δ. When the tool is chucked by a milling machine and moved while pressing the outer circumference of the ball bearing to the reference finishing surface 5 of the workpiece 4, the surface 6 cut by a predetermined amount δ from the reference finishing surface 5 is the reference. It is molded with precision along the finish surface. Since the outer circumference of the bowl bearing 3 is pressed on the reference finishing surface 5, the outer circumference of the bowl bearing is freely rotated even if the cutting edge 1 of the tool is rotated several thousand revolutions per minute. The reference finishing surface 5 of the workpiece is not damaged even when pressed and moved with respect to the reference finishing surface in a rolled state.

2 is a tool for high precision chamfering (for example, angle α and chamfering amount of 0.05 to 0.15 mm) at the intersection with the upper end surface 7 along the reference finish surface 5 of the workpiece 4. The cutting edge 1 is disposed at the tip end of the shank portion 2 in the same manner as in the case of merely machining, and the cutting edge 1 is formed into a conical shape having a predetermined chamfering angle α. In addition, there is a boss 8 coaxial with the shank portion 2 at the end of the cutting edge 1, and the journal bearing 3 freely rotates by inserting and firmly attaching the inner ring of the bowl bearing to the boss portion 8. It consists of:

As an example in FIG. 3, a diagram of a vortex-shaped chamfering to be processed is shown by using the rotary chamfering tool of the present invention. The tool is chucked by a milling machine and the outer circumference of the bowl bearing 3 is pressed against the side wall 5, which is the reference finish surface of the workpiece 4. The height direction of the tool is set according to the chamfering amount. By moving the tool along the side wall 5 while rotating the tool in this state, a chamfer of high precision is automatically formed along the side wall 5. In this case, the work 4 may be moved instead of moving the tool. Also in this case, as in the case of the drawing in Fig. 1, by the action of a freely rotating journal bearing, it can be pressed with an appropriate force without damaging the reference finished surface of the workpiece. In addition, as a method of firmly attaching the cutting edge 1 to the shank portion 2, only the cutting edge 1 is made of a cemented carbide or other high-precision tool material, each of which is fixed by screwing or soldering, A rotary tool or a chamfering tool provided with a journal bearing at the distal end can be considered and can be produced at a relatively low cost.

In addition, as shown in Fig. 4, by attaching the rotary tool of the embodiment to the processing equipment, it is possible to more easily mimic processing.

In other words, in Fig. 4, reference numeral 9 denotes a workpiece, and the chamfered portion of the workpiece with the upper end portion 7 along the reference finish surface of reference numeral 9 is highly precise (for example, C 0.1 ± 0.05) is shown.

The cutting edge 1 is fixed to the shank 2, and a cutting edge (milling cutter) having an angle of 45 degrees with respect to the tool axis (axis of the shank portion) is set. The journal bearing 3 is provided on the tip end side of the cutting edge 1 opposite to the shank portion 2. In the present embodiment, the journal bearing may be a bowl bearing, a needle bearing, a roller bearing, or a sliding bearing.

The other end of the shank 2 is connected to the chuck 12 of the front end of the machining equipment spindle 11. The main shaft is driven by the motor 13 and supported by the main bearing 14, but the main shaft and the main bearing system are supported by a spring 15 which is free to move in a direction perpendicular to the axial direction. .

Now, when chamfering the upper end of the workpiece 9 relative to the reference finish surface 5, the cutting edge 1 is set to a predetermined dimension with respect to the outer periphery of the journal bearing 3. Set. The dimensions in the height direction (Z direction) with respect to the workpiece are fixed and moved along the X and Y programs that roughly determine the main axis of the machining equipment (one of the X and Y axes is not shown).

These X and Y programs are set by a program almost close to the reference finish surface 5 of the workpiece. For example, even if the outer surface of the workpiece is a casting or the like and the nonuniformity from the reference profile is large, the positioning of the workpiece to the jig is bad and the reference coordinate is slightly shifted.

When the processing equipment is moved in this state, the main shaft draws a profile almost close to the reference finish surface 5 of the workpiece 9. Since the outer surface of the journal bearing 3 at the distal end of the cutting edge moves while pressing the spring 15 along the reference finishing surface 5, the positional relationship between the journal outer surface and the cutting edge 1 is fixed, Thereby, even if the reference finishing surface is a casting die surface with poor precision, it can process along a casting die surface.

Further, even if the mounting accuracy of the workpiece is somewhat poor, the chamfered shape with high precision can be formed as a whole. As a result, it is not necessary to consider the mounting precision of the workpiece to the jig, and the mounting time can be greatly reduced, and the mounting jig does not have to be highly demanded, and it is possible to cope with a cheap jig.

As another embodiment, a three-axis arrangement is provided in which an axis freely movable in a direction perpendicular to the tool axis is supported and a Z axis in the vertical direction and a rotation axis are provided on the workpiece. Many workpieces are easy to machine.

In addition, in the embodiment of FIG. 1, an embodiment of a machining facility in which a rotating shaft is provided on the work side to form a four-axis configuration and enables processing of a more complicated shape can also be considered.

Moreover, this processing method is effective for chamfering a complicated profile profile with high accuracy, such as chamfering of a lap end face in a scroll compressor.

As apparent from the above description, the present invention chucks the shank portion of a cutting edge of a rotary tool provided with a freely rotatable journal bearing at the leading end of the cutting edge, and freely moves the main axis driving the vertical axis to the tool axis. It is elastically supported. In addition, the above-mentioned rotating bearings are pressed against the workpiece, and the imitation processing is performed based on the surface thereof. Thereby, the imitation processing with a complicated shape like the chamfer of a scowl wrap tip part can be made easy. In addition, since the workpiece is a reference, high processing accuracy can be realized. In addition, it can be applied to casting leather with poor precision in standard finishing surface. In addition, since the positioning accuracy of the workpiece is automatically corrected, there are various advantages such as a shortening of the mounting time and a low cost of the mounting jig.

Claims (7)

A rotary tool for chamfering a scrawl wrap of a scrawl compressor, characterized by a freely rotating journal bearing at the tip of the cutting edge. The method of claim 1, Rotating tool for chamfering of the scrawl wrap of a scrawl compressor, characterized in that the rotary tool is a milling cutter. The method of claim 1, A rotating tool for chamfering the scrawl wrap of a scrawler compressor, characterized in that the outer diameter of the journal bearing is equal to or smaller than the outer diameter of the cutting edge of the rotary tool. A rotating chamfering tool for chamfering a scrawl wrap of a scrawl compressor, characterized by a freely rotating journal bearing installed at the tip of the cutting blade having an angle with respect to the tool axis. The method of claim 4, wherein Rotating chamfering tool for chamfering the scrawl wrap of a scrawl compressor, characterized in that the rotary chamfering tool is a milling cutter. The method of claim 4, wherein The rotating chamfering tool for chamfering of the scrawl wrap of a scrawl compressor, characterized in that the outer diameter of the journal bearing is the same or smaller with respect to the cutting edge diameter of the rotary chamfering tool. A scrawl characterized by chucking the shank portion of a rotary tool provided with a freely rotatable journal bearing at the leading edge of the cutting edge, and supporting the main shaft for driving it freely in a direction perpendicular to the tool axis. Processing equipment for chamfering of scrawl wrap of compressor.