JP2525304B2 - Key groove processing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key groove processing machine of a type in which a cutting depth is adjusted by a feed wedge.

[0002]

2. Description of the Related Art Conventionally, a key groove processing machine shown in FIGS. 10 and 11 has been used. In this key groove processing machine, a cutter bar 72 is attached to a slide member 71 that is driven up and down.
Attach the base end of the
4 is used to adjust the cut amount of the cutter 75 of the cutter bar 72. The lifting / lowering drive of the slide member 71 is performed by a hydraulic cylinder, and the lifting / lowering stroke of the slide member 71 is regulated by a detected element 84 attached to the slide member 71 and the redmid switches LS1, LS2.

The feed wedge 74 is a slide member 7.
1 is attached to a feed wedge holder 76 that is supported so that its vertical position can be adjusted, and by moving up and down together with the feed wedge holder 76, the cutter bar 72
The cutter 75 is adjusted in and out, that is, the cut amount is adjusted by the inclined surface 74a that is in contact with the tip of the cutter. The feed wedge holder 76 is screwed with a feed screw 77 rotatably attached to the slide member 71, and a gear 79 meshing with a gear 78 of the feed screw 77 engages with the spline shaft 80, whereby the slide member 71 is slid. The position of the feed wedge holder 76 can be adjusted by rotating the spline shaft 80 regardless of the lifting operation of the. The spline shaft 80 is connected to a handle 83 via a screw gear mechanism 81 and a handle shaft 82, and the feed wedge 74 can be operated by the handle 83.

A feed clutch 85 and a spur gear 86 are attached in the middle of the handle shaft 82, and an idle gear 87 is provided.
By driving the feed cylinder 89 via the rod rack 88, the cutting amount of the cutter 75 is deepened for each reciprocation of the cutter 75. Feed amount adjustment handle 9
0 regulates the position of the rod rack 88 on the step surface at the tip,
The feed amount is adjusted once.

Further, in the middle of the handle shaft 82, a stopper arm 92 and a depth setting dial 93 are connected via a worm mechanism 91, and a mechanical multi-plate clutch 9 is provided.
4 are connected. When the cutter 75 is cut by the feed cylinder 89 to the cutting depth set in the depth setting dial 93, the stopper arm 92 contacts the position-fixing stopper 95 to stop the rotation of the handle shaft 82. Cutting depth setting dial 93
Can be locked and unlocked by rotating the dial lock lever 96 at an inclined position.

The tool holder 73 is provided with a structure for performing a cutter escape operation as shown in FIG.
That is, the tool holder 73 is supported by the tool holder support portion 97 of the slide member 71 by the pin 98 protruding on both sides and the elongated hole 99 via a vertical gap d,
The slide member 71 of the cutter bar 72 corresponds to the gap d.
The play of the raising and lowering motion is obtained.

According to the key groove processing machine having this structure, the cutter 7 is attached to the work (not shown) installed at a predetermined position.
The position of the cutter 75 is adjusted by the handle 83 until it hits 5, and thereafter, each time the reciprocating drive of the slide member 71 performs one reciprocal key groove cutting, the feed cylinder 89 increases the cutting amount. Cut setting dial 9
When the cutting is performed up to the set depth of 3, the end limit switch LS3 detects that the stopper arm 92 hits the stopper 95, and the cutting ends.

In the repeating process of raising and lowering the cutter 75, the pin 98 of the tool holder 73 shown in FIG. 11 is brought into contact with the upper surface of the elongated hole 99 and lowered by the slide member 71 when the cutter 75 is lowered, that is, during cutting. However,
When the cutter 75 is raised, the raising operation is delayed with respect to the slide member 71 by the gap d between the elongated holes 99. Therefore, the inclined surface 74a of the feed wedge 74 that rises together with the slide member 71 is released, so that the cutter 75 is prevented from being pressed against the inner surface of the key groove and causing unnecessary resistance.

[0009]

In the above-described conventional key groove processing machine, the cutting depth of the cutter 75 is adjusted by the cutting depth setting dial 93, the stopper arm 92, and the mechanical multi-plate clutch 94. Further, the rod rack 88 and the feed cylinder 89 are used to increase the cut amount for each reciprocation. Therefore, there is a problem that the operation of adjusting the cut amount is troublesome, and the configuration is complicated and the entire apparatus becomes large. Moreover, the escape operation when the cutter 75 is raised is performed by a mechanical mechanism such as the long hole 99 provided in the tool holder 73, which also complicates the configuration.

An object of the present invention is to provide a key groove processing machine which does not require a mechanical cutter relief mechanism or a notch adjusting mechanism, has a simple overall structure, and is easy to operate.

[0011]

The structure of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. This key groove processing machine
Applied to a key groove processing machine provided with a cutter bar (6) attached to a slide member (8) which is driven forward and backward, and a feed wedge (7) which is in contact with an inclined surface (7a) on the rear surface of the tip of the cutter bar (6). To be done. In such a key groove processing machine, the servomotor (22) for advancing and retracting the feed wedge (7) and the servomotor (22) are reversely rotated when the cutter bar (6) is moved to the front side to allow the feed wedge (7) to escape. Control means (30) for making the cutter
The cut amount of the cutter (10) for each round trip of the bar (6)
The cutter bar (6) should be deeper by the set amount.
After moving to the rising end, the cutter (10)
Move it to the position where
Adjust the position of the drive wheel (7) by controlling the motor rotation amount.
The control means (28) is provided. The cutter bar (6) extends in the sliding direction of the slide member (8) and has a cutter (10) at its tip. The feed wedge (7) is attached to the slide member (8) such that its position can be adjusted in the sliding direction.

According to a second aspect of the present invention, in the structure of the first aspect, a cutting amount calculating means for calculating a final cutting depth corresponding to the cutter shape from the data of the key groove depth input from the input means (34). (32) and a cutting amount control means (33) for controlling the rotation of the servomotor (22) according to the calculation amount of this means (32) are provided.

[0013]

According to this structure, the cutting amount of the cutter (10) is adjusted by advancing and retracting the feed wedge (7) by the servo motor (22). Further, the escape control means (30) controls the escape operation of the feed wedge (7) by the reverse rotation of the servo motor (22) when the cutter bar (6) is moved to the tip side.

In the case of the structure of claim 2, the input means (34)
When the data of the key groove depth is input from, the final cut amount according to the cutter shape is calculated from the input data by the cut amount calculating means (32). Depending on the result of this calculation, the rotation amount of the servomotor (22) determines the cut amount control means (3
It is controlled by 2).

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a schematic front view showing the entire key groove processing machine. A mounting table 2 for mounting the work W is provided on the upper surface of the machine body cover 1, and a guide post 3 is provided upright in the center of the mounting table 2. A handle 4 for manually adjusting the cutter depth and an operation panel 5 are provided on a side portion of the machine body cover 1. The guide post 3 has a forward groove shape, and as shown in FIG. 3, a cutter bar 6 and a feed wedge 7 are fitted therein so as to be movable up and down.

As shown in FIG. 1, the cutter bar 6 has a base end attached to a slide member 8 by a tool holder 9, and has a cutter 10 for cutting a groove at the upper end. The slide member 8 is driven up and down by a hydraulic cylinder or an electric motor for cutting a groove by the cutter 10. The slide member 8 is driven by a rotary encoder 13 via a rack 11 and a pinion 12 which are erected on the side surface via a support member. The ascending / descending position is detected. The feed wedge 7 is a member that engages with the rear surface of the tip of the cutter bar 6 at an inclined surface 7 a and adjusts the cut amount of the cutter 10. The lower end of the feed wedge 7 is fixed to a feed wedge holder 14 that is supported by a slide member 8 so as to be able to move up and down. ing.

The feed wedge holder 14 is screwed at a ball nut portion 14a to a feed screw 15 which is rotatably supported by the slide member 8, and is positioned above and below the slide member 8 by the rotation of the feed screw 15. Adjusted.
The feed screw 15 is connected by a gear 18 to a gear 17 engaged with a position-fixed spline shaft 16, and is rotationally transmitted from the spline shaft 16 regardless of the vertical movement of the slide member 8. The gear 17 is supported by a bracket 38 provided on the slide member 8 in a vertically fixed state.

The spline shaft 16 has a bevel gear mechanism 19
The driven pulley 21 attached to the transmission shaft 20 is connected to a drive pulley 23 of a servo motor 22 and a timing belt 24. The transmission shaft 20 is connected to the handle 4 via a joint 25 and a handle shaft 26. As shown in FIG. 6, the transmission shaft 20 and the spline shaft 16 have the bearings 42, 4 of the frame 35.
3, the transmission shaft 20 is a dog 4 mounted on the outer surface.
The origin angle is detected by the proximity switch 45 via 4 (FIG. 7).

FIG. 4 is a front view showing the vicinity of the slide member 8 of FIG. The slide member 8 has guide grooves 8a formed on both sides thereof on the left and right vertical rails 35a of the body frame 35.
It is supported so as to be able to move up and down. The feed wedge holder 14 has left and right vertical rails 8b in which guide grooves (not shown) on both sides are provided in the slide member 8.
It is supported so as to be able to move up and down. The feed screw 15 is rotatably supported by bearings 36 and 37 provided on the slide member 8.

The tool holder 9 is mounted on the tool holder mounting portion 4 of the slide member 8 via the support pins 39 projecting from both sides.
It is supported so as to be tiltable at 0, and is biased rearward by the spring member 41, that is, in the direction in which the cutter bar 6 is tilted toward the feed wedge 7, as shown in FIG.

The servomotor 22 is controlled by the feed wedge control means 28 shown in the functional block diagram of FIG. 1 via the servo controller 29. The feed wedge control means 28 is composed of a small computer such as a microcomputer, and as its functional means, a relief control means 30, a tool data storage means 31, a cutting amount calculating means 32, and a cutting amount control means. And 33.
The details of each means will be described later together with the description of the entire operation.
The cutting amount calculation means 32 has a keyboard 34 as an input means.
Data is input from. The keyboard 34 is provided on the operation panel 5 shown in FIG.

The operation of the above configuration will be described. As shown in FIGS. 2 and 3, the ring-shaped work W installed on the table 2 has the key groove Wa cut on the inner diameter surface a by the cutter 10 as shown in FIG. At the time of cutting, the cutter 10 feeds the feed wedge 7 by a manual operation of the handle 4 and moves it until it abuts the inner diameter surface a of the work W. After this, the slide member 8 is moved up and down to start cutting.

During the cutting, the cutter 10 is adjusted such that the cut amount becomes deeper by a set amount for each reciprocation.
This adjustment is performed by controlling the rotation amount of the servo motor 22 by the feed wedge control means 28 and controlling the ascending / descending position of the feed wedge 7.

In the reciprocating process of the cutter 10, when the cutter 10 moves up, the feed wedge 7
Is slightly raised to allow the cutter 10 to escape to the rear, so that the cutter 10 can be smoothly moved during the upward movement. After the cutter 10 has moved to the rising end, the feed wedge 7
Moves the cutter 10 to a position where a predetermined cut amount is obtained. The cutter escape operation by raising the feed wedge 7 is performed by reversing the servo motor 22 by the escape control means 30 provided in the feed wedge control means 28. In this way, when the cutter 10 is repeatedly reciprocated to reach the target groove depth, the machining is completed.

Next, the control of the groove depth will be described. As shown in FIG. 9, let us consider a case where the groove width is B and the groove depth is A0. In this case, after the cutter 10 is applied to the inner diameter surface a of the work W, a slight error occurs between the final depth of cut A1 and the groove depth A0 required for machining the target depth of the groove. The cut amount calculation means 32 in the feed wedge control means 28 of FIG. 1 calculates the actually necessary final cut amount A1 from the data of the cut depth A0 input from the keyboard 34, the cutter width B, and the angle of the cutter 10. The radius r of the rounded portion and the radius R of the work inner diameter surface a are calculated according to the following calculation formula.

[0026]

[Equation 1]

The final cut amount A1 calculated in this way
The cutting amount control means 33 controls the rotation of the servo motor 22 so that The data of the cutter width B and the radius r of the rounded corner are registered in the tool data storage means 31 in advance, and the radius a of the work inner diameter surface a is input to a predetermined storage area from the keyboard 34 when the lot is changed. Keep it.

According to the key groove processing machine of this construction, the cutting amount of the cutter 10 is adjusted by advancing and retracting the feed wedge 7 by the servo motor 22 as described above. No need for setting means or means for gradually increasing the depth of cut, simplifying the configuration,
The whole can be configured compactly. Further, since the relief operation during the movement of the tip end side of the cutter 10 is automatically performed by the rotation control of the servo motor 22, a mechanical relief mechanism at the attachment portion of the tool holder 9 is not required, and the structure is further simplified. become.

Further, by providing the cutting amount calculating means 32, only by inputting the key groove depth A0, the final cutting amount A1 corresponding to the cutter shape is calculated and controlled to the cutting amount. Therefore, it is easy to correct the error according to the inner diameter surface a of the workpiece and the rounded portion (r) of the cutter 10.
The key groove depth A0 can be machined with high accuracy by simply inputting data.

[0030]

In the key groove processing machine according to the present invention, the cutting depth of the cutter is adjusted by advancing and retracting the feed wedge by the servo motor. Therefore, the mechanical cutting depth setting means and the cutting depth are gradually increased. No increasing means is required, the structure is simple and compact, and the operation is easy. Also, when the cutter is raised before increasing the cutting depth.
, So that the escape control means reverses the servo motor
Therefore, simply controlling the depth of cut with the servo motor
In addition, the relief amount can be controlled, and a mechanical relief mechanism is not required, and the structure is further simplified.

In the case of the second aspect of the invention, the depth of cut is calculated according to the shape of the cutter by inputting the depth of the key groove, and is controlled by the depth of cut. It is easy to correct the error according to the part, and the key groove depth can be machined with high accuracy by only simple data input.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view in which a perspective view showing a main part of an embodiment of the present invention and a functional block diagram are combined.

FIG. 2 is a schematic front view showing the entire keyway processing machine of the same embodiment.

FIG. 3 is an enlarged cutaway side view showing the guide post portion.

FIG. 4 is an enlarged front view showing a slide member and a supporting portion thereof.

FIG. 5 is an enlarged cutaway side view showing a mounting portion of a cutter bar.

FIG. 6 is a cutaway front view showing a support portion and a drive transmission portion of the spline shaft.

FIG. 7 is a cutaway plan view showing a rotation transmission system of a servo motor and a rotation transmission system of a handle.

FIG. 8 is a plan view of a work.

FIG. 9 is an enlarged plan view showing the relationship between the work and the cutter.

FIG. 10 is a perspective view of a main part of a conventional key groove processing machine.

11A and 11B are an enlarged cutaway side view and a cutaway front view, respectively, of a tool holder portion of the conventional example.

[Explanation of symbols]

1 ... Airframe cover, 2 ... Table, 3 ... Guide post, 4
… Handles, 6… cutter bars, 7… feed wedges,
7a ... inclined surface, 8 ... slide member, 9 ... tool holder, 1
0 ... Cutter, 14 ... Feed wedge holder, 22 ... Servo motor, 28 ... Feed wedge control means, 30 ...
Release control means, 32 ... Cut amount calculation means, 33 ... Cut amount control means, 34 ... Keyboard, W ... Work, Wa ... Key groove

Claims (2)

(57) [Claims] 1. A cutter bar having a base end attached to a slide member which is driven forward and backward and extending in a slide direction and having a cutter at a tip end, and a cutter bar which is attached to the slide member so as to be positionally adjustable in the slide direction, and is provided on a rear surface of the tip end of the cutter bar. The feed wedge that contacts with the inclined surface, the servomotor that moves the feed wedge forward and backward, and the reciprocating pass of the cutter bar.
Degree, the control means for operating Relieve the feed wedge by reversing the motor when upward movement of the front end side of the front Symbol Kattaba, one round trip per the Kattaba
So that the cutting depth of the cutter becomes deeper by the set amount.
After the cutter bar moves to the rising end, the cutter
Move it to the position where the cut amount becomes constant.
Adjust the wedge position by controlling the motor rotation amount.
A key groove processing machine equipped with a control means . 2. A cutting amount calculating means for calculating a final cutting depth corresponding to a cutter shape from data of a key groove depth inputted from an input means, and a rotation of a servomotor is controlled according to a calculation result of this means. The key groove processing machine according to claim 1, further comprising cutting amount control means.