JPH09108990A - Turret board - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a turret machine that prevents a tool spindle from expanding due to heat generated during cutting and obtains a workpiece with high dimensional accuracy. SOLUTION: The tool support shaft 31 has a through hole 33 for passing the cooling liquid C in the shaft center, and the turret board 1 has the cooling liquid supply means 24 for injecting the cooling liquid C from one end of the through hole 33. . [Effect] The cooling liquid can be injected from the cooling liquid supply means into the through hole of the tool support shaft, the tool support shaft can be cooled, the thermal expansion of the tool support shaft can be suppressed, and the machining accuracy can be improved.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a turret board.

[0002]

2. Description of the Related Art FIG. 7 is an explanatory view of a cutting process by a conventional turret machine. The turret machine 100 includes a spindle housing 101 and a center shaft 102 mounted on a spindle (not shown) housed in the spindle housing 101. A bevel gear 103 attached to the center shaft 102, a bevel gear 104 meshing with the bevel gear 103, and a bevel gear 104.
A first rotary shaft 105 for supporting the first rotary shaft 105, a helical gear 106 mounted on the first rotary shaft 105, and a helical gear mounted on a second rotary shaft (not shown) meshing with the helical gear 106,
A helical gear 107 that meshes with the helical gear, a tool support shaft 108 that supports the helical gear 107, and side cutters 109 and 109 attached to the tool support shaft 108 are provided. Is the tip 11
0 ... (... indicates a plurality, the same applies hereinafter).

[0003]

When machining the work W, the power is supplied from the main shaft to the center shaft 102 and the first rotary shaft 10.
5, transmitted to the tool support shaft 108 via the respective gears attached to the second rotary shaft. Friction heat is generated in the bevel gear and the helical gear due to the contact, and the temperature rises. When the bevel gear is the spiral bevel gear shown in the figure, frictional heat is generated more significantly than in the direct bevel gear.

Such frictional heat is generated in each gear, is transmitted to the tool support shaft 108 and becomes high temperature, and the tool support shaft 108 is thermally expanded. The thermal expansion of the tool support shaft 108 in the axial direction widens the space between the upper and lower side cutters 109, 109 and causes the machining size of the work W to be disturbed. An object of the present invention is to provide a turret machine that prevents a tool spindle from expanding due to heat generated during cutting and obtains a workpiece with high dimensional accuracy.

[0005]

In order to achieve the above object, the first aspect of the present invention is to provide a tool support shaft with a through hole for allowing a cooling liquid to pass therethrough, and a turret plate with a through hole. It has a cooling liquid supply means for injecting the cooling liquid from one end. This allows
The cooling liquid can be injected from the cooling liquid supply means into the through hole of the tool support shaft, and the tool support shaft can be cooled.

According to a second aspect of the present invention, the tool support shaft has a swirling groove or swirling strip for swirling the cooling liquid in the through hole. As a result, the cooling liquid injected into the through hole flows over the through hole over a period of time while swirling, so that heat can be sufficiently taken from the tool support shaft.

According to a third aspect of the present invention, the tool support shaft is vertical, and the coolant discharge port of the cooling liquid supply means is disposed above the upper surface of the tool support shaft and faces the through hole. As a result, the cooling liquid enters the through hole of the tool support shaft from the refrigerant discharge port and can cool the tool support shaft.

[0008]

Embodiments 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 perspective view of a turret board according to the present invention. The turret board 1 includes an X-axis slide rail (not shown) mounted on a bed 2, and an X-axis rail cover 3 that covers the X-axis slide rail in a stretchable manner. , 3a, an X-axis slide table 4 slidably mounted on the X-axis slide rail in the X direction of the arrow (referred to as X-axis), an X-axis motor 5 for driving the X-axis slide table 4, The Y-axis slide rails 6 and 6 mounted on the axis-slide table 4, Y-axis rail covers 7 and 7 that cover the Y-axis slide rails 6 and 6 so that they can expand and contract, and the arrow marks on the Y-axis slide rails 6 and 6. A Y-axis slide table 8 slidably mounted in the Y direction (Y axis), a Y-axis motor (not shown) for driving the Y-axis slide table 8, and two units mounted on the Y-axis slide table 8. Lifting cylinder 11 12 and a Z-axis motor 13, the elevating table 14 to lift by the lifting cylinder 11 and the Z-axis motor 13, and the turret head 15 while attached to the lifting table 14, the lifting cylinder 12
Turret head 16 that moves up and down with two spindle housings 17, 1 attached to the tread head 15.
8, an angled head 21 attached to one spindle housing 17, a bore cutter 22 attached to the other spindle housing 18, side cutters 23, 23 attached to the angled head 21, and side cutters 23, 2
3 includes a supply pipe 24 for supplying cutting fluid to a through hole 33 of a tool support shaft 31 (see FIG. 2) to be mounted later, and a cover 25 provided upright around the bed 2.

FIG. 2 is a plan view of the angled head and the side cutter portion according to the present invention.
The side cutter 23 includes a base portion 27 attached to the spindle housing 17 and an arm portion 28 attached to the base portion 27 at an angle. The side cutter 23 is attached to the tool support shaft 31 attached to the end portion of the arm portion 28 with bolts 32. , 23 (the back side is not shown). The tool support shaft 31 has a through hole 33 at the center of the shaft for passing the cutting fluid C (see FIG. 5) from above.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2, in which the spindle housing 17 has a center shaft 36 attached to the center of the rotating main shaft 35. Angled head 21
Is a bevel gear 38 attached to the center shaft 36 with a nut 37.
And a first rotating shaft 43 that supports a bevel gear 41 that meshes with the bevel gear 38 on the lower portion and a helical gear 42 on the upper portion,
The tapered roller bearings 44 and 44 supporting both ends of the first rotating shaft 43 and the tapered roller bearings 44 and 44 are
Nuts 45, 45 for mounting on the rotary shaft 43, a second rotary shaft 47 for supporting a helical gear 46 meshing with the helical gear 42, and ball bearings 48, 48 for supporting both ends of the second rotary shaft 47. And the helical gear 5 that meshes with the helical gear 46.
1 is formed at the center in the axial longitudinal direction, ball bearings 52, 52 that support the tool support shaft 31 above and below a helical gear 51, and the tool support shaft 31 is provided with the tool support shaft 31. Adapter 5 attached with bolts 53 so as to be sandwiched in the axial direction
4, 54 and the bolts 5 so that they are fitted in the recesses of the adapters 54, 54 to prevent the side cutters 23, 23 from rotating.
5 and the side cutters 23, 23 directly attached to the lower adapter 54 via the spacer 58 to the upper adapter 54 by the bolts 57.
Holding members 63 and 63 for holding the sealing members 62 and 62 for preventing cutting fluid from entering the ball bearings and gears, and a case 65 of the arm portion 28 to which the holding members 63 and 63 are attached by bolts 64, The second rotating shaft 4 of this case 65
7 a second cover 67 mounted on the upper side with bolts 66 (see FIG. 2) and the arm portion 2 so as to cover the upper side of the first rotating shaft 43.
8, an upper first cover 69 attached to the lower rotary shaft 43 by a bolt 68, a bearing holding portion 73 attached to the lower arm portion 28 of the first rotary shaft 43 by a bolt 72, and a lower portion of the first rotary shaft 43 attached to the bearing holding portion 73. And a lower first cover 75 attached with bolts 74 so as to cover the base 27.

The side cutter 23 has chips 23a for cutting the work W at a plurality of positions at the same time. The case 65 and the base portion 27 of the angled head 21 seal each portion with an O-ring R so that cutting fluid and the like do not enter inside thereof.

FIG. 4 is a partial cross-sectional view of the tool support shaft according to the present invention. The tool support shaft 31 has a swivel strip 33a on the inner surface of the through hole 33 from the upper part to the lower part. The swirl strip 33a swirls water when the cutting fluid flows from above the through hole 33,
Sufficient heat is taken from the inner surface of the through hole 33 over time. The cross-sectional shape of the swirl strip 33a may be a polygon, a semicircle, or the like other than the rectangular shape shown in the figure, and the point is that it may be projected from the inner surface of the through hole 33. Further, in order to cool the tool support shaft 31, a swirl groove may be formed on the inner surface of the through hole from the upper part to the lower part.

The operation of the turret board described above will be described below. FIG. 5 is an explanatory diagram during processing on the turret board according to the present invention, in which the work W (for example, the bearing cap mounting portion of the engine cylinder block) mounted on the work mounting jig J is cut by the turret board 1. In the case of processing, first, in order to position the side cutter 23, in FIG. 1, the vertical position is aligned with the processing position of the bearing cap mounting portion by the lifting cylinder 11 and the Z-axis motor 13. Next, power is transmitted from the main shaft 35 to the side cutter 23 via the gear train and driven.

Thereafter, the side cutter 23 is attached to the X-axis motor 5
To feed in the X-axis direction, and as shown in FIG. 5, a plurality of bearing cap mounting portions are processed in the front and back directions in the figure. At this time, in order to cool the tool support shaft 31 which has been heated to a high temperature by the heat from the gear train, the through hole 33 of the tool support shaft 31 is inserted into the through hole 33.
The cutting fluid C is injected from the discharge port 24a of the supply pipe 24 which is disposed above so as to face 3. Also, the side cutter 2
Since the tip 23a of No. 3 also has a high temperature due to cutting, it is not shown in the figure, but is cooled by applying cutting fluid.

FIG. 6 is an action diagram of the through hole of the tool support shaft according to the present invention. The heat generated in the gear train is conducted to the gear part of the tool support shaft 31 as indicated by the arrow, and the heat of the tool support shaft 31 is reduced. The heat is
It is absorbed by the cutting fluid C flowing through the through hole 33 as indicated by the arrow. Further, the heat generated by the tip 23a of the side cutter 23 is conducted in the side cutter 23 as shown by the arrow, and the cutting fluid C from the adapter 54 and the tool support shaft 31 as shown by the arrow.
Is absorbed by Therefore, since the tool support shaft 31 does not receive heat and its temperature does not rise, thermal expansion does not occur, the machining accuracy is improved, and it is not necessary to selectively fit the bearing cap mounting portion of the cylinder block and the bearing cap. The cost for this management can be reduced. Further, the temperature of the chip 23a can be reduced and the life can be extended.

[0016]

The present invention has the following effects due to the above configuration. The turret disc according to claim 1 has a through hole for allowing the cooling liquid to pass through the tool support shaft, and a cooling liquid supply means for injecting the cooling liquid from one end of the through hole. It is possible to inject the cooling liquid into the through hole of the tool spindle, cool the tool spindle, and suppress the thermal expansion of the tool spindle.
The processing accuracy can be increased.

In the turret disk according to the second aspect of the present invention, the tool support shaft has a swirl groove or swirl line for swirling the cooling liquid in the through hole, so that the injected cooling liquid takes time while swirling through the through hole. Since it flows as it flows, heat can be sufficiently taken from the tool spindle, thermal expansion due to temperature rise of the tool spindle can be suppressed, and machining accuracy can be improved.

In the turret disc according to the third aspect, since the tool support shaft is vertical and the coolant discharge port of the cooling liquid supply means is located above the upper surface of the tool support shaft and faces the through hole, the cooling liquid is supplied. Since the refrigerant discharge port completely enters the through hole of the tool support shaft, the tool support shaft can be effectively cooled.

[Brief description of the drawings]

FIG. 1 is a perspective view of a turret board according to the present invention.

FIG. 2 is a plan view of an angled head and a side cutter portion according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a partial sectional view of a tool spindle according to the present invention.

FIG. 5 is an explanatory view during processing on the turret machine according to the present invention.

FIG. 6 is an operation diagram of a through hole of a tool spindle according to the present invention.

FIG. 7 is an explanatory view of cutting processing by a conventional turret machine.

[Explanation of symbols]

1 ... Turret board, 16 ... Turret head, 21 ... Angled head, 23 ... Side cutter (rotary tool), 24a
... discharge port (refrigerant discharge port), 31 ... tool support shaft, 33 ... through hole, 33a ... swivel line, 38, 41 ... bevel gear, 42, 4
6, 51 ... Helical gears, C ... Cutting fluid (cooling fluid).

Claims (3)

[Claims] 1. An angled head is attached to a turret head, a tool support shaft for attaching a rotary tool is attached to the tip of the angled head, and the tool support shaft is a gear train for transmitting power from the turret head side. In the turret plate that is made to rotate, the tool support shaft has a through hole for passing a cooling liquid in its axis, and the turret plate has a cooling liquid supply means for injecting the cooling liquid from one end of the through hole. A turret board characterized by having. 2. The turret board according to claim 1, wherein the tool support shaft has a swirl groove or swirl line for swirling the cooling liquid in the through hole. 3. The tool support shaft is vertical, and the coolant discharge port of the cooling liquid supply means is arranged above the upper surface of the tool support shaft and at a position facing the through hole. The turret board according to claim 1 or 2.