JPH091414A - Face milling machine - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to shorten the total machining time and increase the production efficiency by consolidating the chamfering process and the deburring process. [Structure] A spindle 3 that rotates while supporting a milling tool 2.
And a spindle head 4 that rotatably holds the spindle 3.
A shift cylinder 5 attached to the spindle head 4, a brush holding member 6 supported by the shift cylinder 5 and moving in the axial direction of the spindle 3, and a brush holding member 6 held by the brush holding member 6 having a diameter larger than that of the milling tool 2. It consists of a cup-shaped brush 7 and a clutch mechanism 10 that connects the brush holding member 6 to the main shaft 3 when the cup-shaped brush 7 is projected forward from the milling tool 2, and is processed by the cup-shaped brush 7 after milling. The surface is appropriately brushed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering milling machine, and more particularly to a chamfering milling machine having a deburring function.

[0002]

2. Description of the Related Art When a workpiece such as a cylinder block is subjected to face milling with a milling tool, burrs are generated in the concave portion, hole portion and corner of the workpiece. Conventionally, this burr is removed in a deburring process using a deburring tool such as a rotating brush.

[0003]

That is, conventionally, the chamfering step and the deburring step have been carried out in separate steps. Therefore, the total processing time becomes long and it is difficult to increase the production efficiency. Therefore, an object of the present invention is to reduce the total machining time by increasing the production efficiency by integrating the chamfering process and the deburring process.

[0004]

In order to achieve the above-mentioned object, the present invention has a spindle that rotates while supporting a milling tool, a spindle head that holds the spindle rotatably, and a spindle head that is attached to the spindle head. A shift cylinder, a brush holding member supported by the shift cylinder and moving in the axial direction of the main shaft, a cup-shaped brush held by the brush holding member and having a diameter larger than that of the milling tool, and a milling tool for the cup-shaped brush. When projecting further forward, a milling device for chamfering is configured from a clutch mechanism that connects a brush holding member to the main shaft, and after milling, the machining surface is appropriately brushed with a cup-shaped brush. And

[0005]

With the work set in the milling machine, predetermined milling is performed, the milling tool is retracted, and at the same time the cup-shaped brush is advanced, and deburring is performed with this brush. Since the chamfering process and the deburring process are performed in one process, the processing time is shortened.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a sectional view of an essential part of a milling apparatus for chamfering according to a first embodiment of the present invention. The milling apparatus 1 for chamfering is a spindle 3 that rotates while supporting a milling tool 2, and the spindle 3 A rotatably holding spindle head 4, a shift cylinder 5 attached to the spindle head 4, a brush holding member 6 supported by the shift cylinder 5 and moving in the axial direction of the spindle 3.
The cup-shaped brush 7 having a diameter larger than that of the milling tool 2 held by the brush holding member 6 and the brush holding member 6 on the spindle 3 when the cup-shaped brush 7 is projected forward from the milling tool 2. And a clutch mechanism 10 for connecting the. Each configuration will be described in detail below.

The main shaft 3 includes a spindle 3a driven by a motor (not shown), and a tool mounting shaft 3d which is connected to the spindle 3a via a key 3b and is supported by a main spindle head 4 via bearings 3c and 3c. Consists of. The tool mounting shaft 3d is provided with a flange portion 3f at its tip, a concave portion 3g is formed in the center of the flange portion 3f, and a female screw portion 3h is formed around the periphery.
Indicates a plurality. The same applies hereinafter. ). 3j, 3j are oil seals, 3k is an end plate, and the bearing 3
The outer rings of c and 3c are held down, and 3m is a bearing nut that holds down the inner rings of the bearings 3c and 3c.

The relay disk 9 is brought into contact with the flange portion 3f at the tip of the main shaft 3. The relay disk 9 has convex portions 9a, 9b at the front and rear in the center, bolt holes 9c ... Enclosing the convex portions 9a, 9b, and a clutch pin 11 ...
Is projected. The milling tool 2 is brought into contact with the relay disc 9. This milling tool 2 is a disc-shaped tool base 2
Plural cutting tips 2b ... are projected on a and a hole 2 is formed in the center.
c, and has bolt holes 2d ... Surrounding this hole 2c.
The convex portion 9b of the relay disk 9 is fitted into the concave portion 3g of the flange portion 3f, and then the hole 2c of the tool base 2a is fitted into the convex portion 9a of the relay disk 9 to accurately bring out the core. In this state, the relay disk 9 and the tool base 2a are connected to the flange portion 3f with the bolts 8 ...

On the other hand, receiving pins 12, ... Opposed to the clutch pins 11, ... Are projectingly provided on the spindle head 4, and a clutch plate 13 is slidably attached to these receiving pins 12 ,. The clutch plate 13 has a large hole 13a formed in a sufficiently thick disc, and the through holes 13b ...
The brush holding member 6 is fixed to the outer peripheral portion.

The brush holding member 6 is a cylinder with a flange, and the cup-shaped brush 7 is attached to one flange 6a and the fork member 14 is loosely fitted to the other flange 6b. Fork member 1
4 is provided with cam followers 14a, 14a arranged with a small gap in front of and behind the collar 6b. These cam followers 1
The rollers 4a and 14a are attached to the shafts via bearings, and the rollers are extremely smooth and freely rotatable. Therefore, the fork member 14 is a member that restricts the left and right positions in the drawing while allowing the collar 6b to rotate. The fork member 14 is the piston rod 5a of the shift cylinder 5.
Is combined with and moves back and forth.

The clutch mechanism 10 comprises the relay disc 9, clutch pins 11, ..., Clutch plate 13, and fork member 14, and the figure shows the clutch off state.
The clutch plate 13 is stored in the receiving pins 12 ... And is in a non-rotating and standby state together with the cup-shaped brush 7.

The operation of the chamfering milling device having the above structure will be described below. In the device of the present invention, since the spindle 3a is NC fixed position controlled by the servomotor, the clutch pin 11 can be accurately aligned with the receiving pin 12. FIG. 2 is an explanatory view of a chamfering process of the chamfering milling device according to the first embodiment of the present invention. To chamfer the work W, the clutch plate 13 is held at the standby position. Specifically, the clutch plate 13 is supported by the receiving pins 12 ... In this state, the spindle 3a rotates the tool mounting shaft 3d, the relay disk 9 and the milling tool 2. Next, the spindle head 4 is moved to the left in the drawing to bring the milling tool 2 close to the work W, and the cutting tip 2 at the tip is moved.
The work W is chamfered with b. At this time, the cup-shaped brush 7 is in the non-rotating state. When the predetermined face-cutting work is completed, the spindle head 4 is retracted and the cutting tips 2b ... Are separated from the work W.

FIG. 3 is an explanatory view of a deburring process of the milling device for chamfering according to the first embodiment of the present invention. At the end of FIG. 2, the cutting tips 2b ... Are separated from the work W. From this state, the piston rod 5a of the shift cylinder 5 is fully advanced. Then, the clutch plate 13 transfers from the receiving pins 12 to the clutch pins 11 via the fork member 14, and as a result, the cup-shaped brush 7 moves forward to contact the work W. This state is shown in FIG. 3, and the spindle 3
By rotating a, the tool mounting shaft 3d, the relay disk 9,
Clutch pin 11, clutch plate 13, brush holding member 6
The torque is transmitted in this order, and the cup-shaped brush 7 rotates at high speed. This rotation direction is opposite to the rotation direction of the milling tool 2 in FIG. This will cause a tilted burr and improve the efficiency of deburring.

FIG. 4 is a process explanatory view for simultaneously carrying out chamfering and deburring in the chamfering milling device according to the first embodiment of the present invention. When the machining allowance in milling is small, It is possible to carry out chamfering and deburring at the same time as required. First, from the state of FIG. 1, the shift cylinder 5
The piston rod 5a is moved forward to bring the tip of the cup-shaped brush 7 slightly out of the cutting tip 2b. That is, the piston rod 5a is stopped during the full stroke of the cylinder. Therefore, the shift cylinder 5 adopts a type capable of controlling at least three positions. The three positions may be the forward limit, the intermediate position, and the backward limit of the cylinder.

Then, the spindle head 4 is advanced while rotating the cutting tip 2b and the cup-shaped brush 7. The cutting tip 2b and the cup-shaped brush 7 are brought into contact with the work W,
The chamfering process and the deburring process are performed at the same time. In this case, the cutting tip 2b and the cup-shaped brush 7 rotate in the same direction, and the deburring performance is slightly inferior. However, since the cutting allowance in milling is small, the burr that occurs is thin and can be removed relatively easily, so there is no concern about omission of removal. In the first embodiment, the chamfering process and the deburring process can be continuously performed without removing the work W by performing FIGS. 2 and 3. Alternatively, when the machining allowance in the milling process is small, the chamfering process and the deburring process can be performed simultaneously as in the procedure of FIG.

FIG. 5 is a side view of an essential part of a milling device for chamfering according to a second embodiment of the present invention, and FIG. 6 is a view taken in the direction of arrow 6 in FIG. The same parts as those in the first embodiment have the same signs. However,
If the names are the same but the shapes are significantly different, "A" is added to the code or a new code is added.

In this face milling machine 1A, a receiving pin 12A and a shift cylinder 5 are attached to a spindle head 4,
The brush holding member 6A is slidably attached to the receiving pin 12A, and the cup-shaped brush 7 is attached to the tip of the brush holding member 6A.
A is attached to the piston rod 5a of the shift cylinder 5 and a reverse Y shown in FIG.
A pin 1 in which the base of a character-shaped fork member 14A is attached and the abrasive grains of the arm of the fork member 14A are extended from the spindle head 4.
The pins 18 and 18 are attached to the tips of the arms of the fork member 14A, and these pins 18 and 18 are loosely fitted in the annular groove 6d of the brush holding member 6A.

In the figure, reference numeral 21 is a stopper, which limits the movement of the fork member 14A and defines the forward limit of the cup-shaped brush 7A. Further, reference numeral 23 is a middle pedestal of the receiving pin 12A, which receives the longitudinal center of the receiving pin 12A via the bearing metal 24 inside. Reference numeral 25 is an adjusting screw, and 26 is a lock nut, and the protrusion of the receiving pin 12A can be adjusted as necessary.

In the case where an air micro switch (not shown) is incorporated in the receiving pin 12A or the clutch pin 11A to detect whether or not the mating member is positioned immediately before depending on the magnitude of the air pressure, the receiving pin 12A and the clutch. The gap adjustment with the pin 11A is important. Therefore, if the projection of the receiving pin 12A can be easily adjusted as in this example, the adjustment of the air micro switch can be easily performed. Second
Also in the embodiment, the NC pin position control by the servo motor allows the clutch pin 11A to be accurately aligned with the receiving pin 12A, but the alignment result can be confirmed with the air micro switch. It is possible to prevent mechanical troubles caused by madness from occurring.

The operation of the second embodiment will be described. In the state shown in FIG. 5, the cutting tip 2b carries out a predetermined chamfering step. Next, the piston rod 5a of the shift cylinder 5 is retracted. Then, the fork member 14A rotates rightward in the figure around the pin 17, and the pins 18 and 18 move the brush holding member 6A. The brush holding member 6A transfers from the receiving pin 12A to the clutch pin 11A, and as a result, the tip of the cup-shaped brush 7A projects from the cutting tip 2b. The deburring process is performed in this state. In the second embodiment, since the pair of pins 18 and 18 push out the both sides of the brush holding member 6A, the movement of the brush holding member 6A is smoother than that in the first embodiment (structure for pushing out the collar 6b). Become.

In the present embodiment, the main shaft 3 is horizontal for the purpose of drawing. However, the main shaft 3 may be oriented vertically and may be used for processing a workpiece placed thereunder. The posture is arbitrary.

[0022]

The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, there is provided a spindle that rotates while supporting the milling tool, and a spindle head that rotatably holds the spindle.
A shift cylinder attached to the spindle head; a brush holding member supported by the shift cylinder and moving in the axial direction of the spindle; a cup-shaped brush held by the brush holding member and having a diameter larger than that of the milling tool; When the cup-shaped brush is projected forward from the milling tool, a chamfering milling device is configured with a clutch mechanism that connects the brush holding member to the main shaft, and after the milling, the machined surface is appropriately brushed with the cup-shaped brush. Because it is a configuration,
With the work set in the milling machine, perform a predetermined milling process, retract the milling tool, and at the same time move the cup-shaped brush forward and perform deburring with this brush, or perform the milling process and deburring process. Can be done at the same time. Therefore, in the invention of claim 1, since the chamfering process and the deburring process are performed in one process, the machining time is shortened, the efficiency of the chamfering work of the workpiece is increased, and the productivity accompanying the milling is greatly improved. be able to. Further, since the cup-shaped brush is driven by the main shaft, it is not necessary to separately prepare a drive device for the brush, and a special effect that the milling device and the brushing device can be integrated can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of an essential part of a milling device for chamfering according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a chamfering process of the chamfering milling device according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a deburring process of the chamfering milling device according to the first embodiment of the present invention.

FIG. 4 is an explanatory view of a process for simultaneously performing chamfering and deburring with the chamfering milling device according to the first embodiment of the present invention.

FIG. 5 is a side view of a main part of a milling device for chamfering according to a second embodiment of the present invention.

6 is a view taken in the direction of arrow 6 in FIG. 5;

[Explanation of symbols]

1 ... Face milling machine, 2 ... Milling tool, 2b ... Cutting tip, 3 ... Spindle, 3a ... Spindle, 3d ... Tool mounting axis, 4 ... Spindle head, 5 ... Shift cylinder, 5a ...
Piston rod, 6 ... Brush holding member, 7 ... Cup brush, 9 ... Relay disk, 10 ... Clutch mechanism, 11 ... Clutch pin, 12 ... Receiving pin, 13 ... Clutch plate, 14 ...
Fork member, W ... Work.

Claims (1)

[Claims] 1. A spindle that rotates while supporting a milling tool, a spindle head that rotatably holds the spindle, a shift cylinder attached to the spindle head, and a spindle supported by the shift cylinder in the axial direction of the spindle. A moving brush holding member, a cup-shaped brush held by the brush holding member and having a diameter larger than that of the milling tool, and a brush holding member on the main shaft when the cup-shaped brush is projected forward from the milling tool. A milling device for chamfering, which comprises a clutch mechanism for connecting to each other, and has a configuration in which a machined surface is appropriately brushed with a cup-shaped brush after milling.