JP2022164025A - Chip removal device and chip removal method of machine tool - Google Patents

Abstract

To provide a chip removal device of a machine tool which can efficiently remove chips adhering to an intricate portion, such as a hole cut in a lateral direction, without deteriorating processing efficiency.SOLUTION: A chip removal device of a machine tool removes chips from a workpiece 10, which is moved relative to a tool 7 to be processed, in a workpiece processing space 210 partitioned by a cover member 200. The chip removal device includes coolant discharge mechanisms 30 each disposed on at least one of a pair of side surfaces 201, 202, which face each other across a spindle 6, or a position near the side surface and including a discharge nozzle 31 which discharges a coolant from the one side surface to the other side surface to remove chips from the workpiece 10.SELECTED DRAWING: Figure 3

Description

The present invention relates to a chip removing device and chip removing method for a machine tool for removing chips from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member.

A machine tool is equipped with a coolant nozzle that sprays coolant toward a machining area of a workpiece in order to remove chips generated during machining of the workpiece from the machining area. Such coolant nozzles are provided on the tool shaft or on the ceiling of a cover member covering the machining area of the workpiece, that is, the splash guard.

In Patent Document 1, a coolant pipe is connected to a coolant supply source and is piped above a splash guard so that the coolant can be sprayed over a wide range of the machining area, and the coolant pipe is branched from the upper part of the pipe, A shower coolant device is disclosed that includes a plurality of coolant nozzles that are mounted upwardly or laterally at their roots and have downward openings at their tips.

Japanese Patent Application Laid-Open No. 2007-30142

For example, in a horizontal machining center, a tool attached to a horizontal spindle is used to cut a workpiece fixed on a table, or to sequentially machine workpieces attached to the four sides of a tombstone fixed to the table. At that time, it is necessary to remove chips adhering to the work.

Chips adhering to the outer surface of the workpiece can be removed, for example, by discharging coolant from a shower coolant device installed on the ceiling. However, shavings adhering to intricate places such as laterally cut holes cannot be removed by the shower coolant system.

In addition, when the coolant is discharged from the coolant nozzle attached to the spindle in order to remove chips adhering to concave portions such as holes cut sideways, the workpiece cannot be machined until the chips are removed. not possible, resulting in reduced processing efficiency. Such problems are not limited to horizontal machining centers, but also occur in multi-tasking machines.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a chip removing device for a machine tool and a chip that can efficiently remove chips adhering to intricate places such as laterally cut holes without causing a decrease in machining efficiency. The point is to provide a removal method.

In order to achieve this object, the chip removing device for machine tools according to the present invention removes chips from a machined workpiece through relative movement with a tool in a workpiece machining space partitioned by a cover member. Discharge device disposed on or near at least one of a pair of side surfaces facing each other across the main shaft, for removing chips from the workpiece by discharging coolant from the one side surface toward the other side surface. It is characterized by having a coolant discharge mechanism including a nozzle.

A feature of the chip removing method for a machine tool according to the present invention is a chip removing method for a machine tool in which chips are removed from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member. and removing chips from the workpiece by discharging coolant from at least one of a pair of side surfaces facing each other across the main shaft toward the other side surface.

According to the present invention, there is provided a chip removing device and a chip removing method for a machine tool capable of efficiently removing chips adhering to intricate places such as laterally cut holes without lowering machining efficiency. will be able to

It is an explanatory view of the chip removing device of the machine tool as viewed from the side, and is an explanatory view showing a coolant discharge mechanism installed on the back side. It is an explanatory view of the front view of the chip removing device of the machine tool. It is an explanatory view of the plan view of the chip removing device of the machine tool.

[Basic embodiment of machine tool chip removal device and removal method]
INDUSTRIAL APPLICABILITY As described above, the chip removing device for machine tools according to the present invention is a chip removing device for machine tools that removes chips from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member. a discharge nozzle disposed on or near at least one of a pair of side surfaces facing each other with the main shaft interposed therebetween, for removing chips from the workpiece by discharging coolant from the one side surface toward the other side surface; It has a coolant discharge mechanism including.

A hole cut laterally, for example, by coolant discharged laterally toward the other side from a discharge nozzle disposed on or near at least one of a pair of side faces facing each other across the main axis, Chips adhering to complicated places are effectively removed. Since it is possible to continue machining the workpiece with the tool during that time, the machining efficiency is not lowered.

The coolant discharge mechanism includes a liquid supply pipe extending in a height direction and formed with an opening for mounting the discharge nozzle, and a movement mechanism for horizontally moving the liquid supply pipe along the one side surface. , is preferably provided.

With this configuration, as the coolant discharge mechanism having the nozzle, the liquid supply pipe having the opening for mounting the discharge nozzle extends in the height direction, and the liquid supply pipe is moved using the moving mechanism. The position of the ejection nozzle attached to the opening can be moved in the horizontal direction by moving the nozzle in the horizontal direction along one side surface.

The direction of movement of the liquid supply pipe is preferably along the direction of movement of the horizontal component of the machining point relative to the work, and the liquid supply pipe is moved in the direction of movement of the horizontal component of the machining point relative to the workpiece. By doing so, it is possible to correspond to the position of the machined workpiece.

Further, it is preferable that a plurality of openings are formed along the axial direction of the liquid supply pipe, and the discharge height of the coolant discharged from the discharge nozzle can be adjusted. The position of the discharge nozzle can be easily adjusted accordingly.

It is preferable that a detachable plugging member is attached to the opening other than the opening to which the discharge nozzle is attached among the openings, and unnecessary consumption of coolant is avoided by attaching the plugging member. Also, it is possible to avoid a decrease in the discharge pressure of the coolant discharged from the discharge nozzle, and to appropriately remove chips.

The opening is preferably formed in a range corresponding to the vertical movement range of the machining point with respect to the workpiece, so that the discharge nozzle can be mounted at an appropriate position corresponding to the movement range of the machining point.

The moving mechanism is provided with a guide rail attached to the ceiling of the cover member and a ball screw mechanism for moving the liquid supply pipe along the guide rail.

A guide rail attached to the ceiling of the cover member movably supports the liquid supply pipe, and the ball screw mechanism allows the liquid supply pipe to be accurately moved along the pair of side surfaces.

A machine tool chip removing method according to the present invention is a machine tool chip removing method for removing chips from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member. Remove chips from the workpiece by discharging coolant from at least one of a pair of opposing side surfaces toward the other side surface.

[Detailed Embodiment of Chip Removal Device for Machine Tool]
Hereinafter, detailed embodiments of a chip removing device and a chip removing method for a machine tool will be described based on the drawings.

FIGS. 1 to 3 show a machine tool 100 installed in a machining space 210 partitioned by a cover member 200 for machining a workpiece 10. FIG.

A machine tool 100 includes a bed 1, a table 2 that moves in the Z-axis direction along a guide surface on the bed 1, a pallet 3 that rotates about the B-axis in a vertical posture on the table 2, and a bed 1 that is vertically installed. It is a horizontal machining center provided with a column 4 that moves in the X-axis direction along the guide surface on the bed 1 and a spindle head 5 that moves in the Y-axis direction along the guide surface of the column 4. As indicated by a two-dot chain line in the figure, the machining center is surrounded by a cover member 200, and the cover member 200 is provided with a door (not shown) that can be opened and closed.

When the servomotor MZ is driven, the table 2 moves on the bed 1 along the linear motion drive axis in the Z-axis direction, and when the servomotor MB is driven, the pallet 3 rotates on the table 2 around the B axis. , when the servomotor MX is driven, the column 4 moves on the bed 1 along the linear motion drive shaft in the X-axis direction, and when the servomotor MY is driven, the spindle head 5 moves on the column 4 in the Y-axis direction. Move along the linear drive shaft.

A tool 7 is held by a spindle 6 provided on a spindle head 5, and when a servomotor MS1 is driven, the tool 7 rotates around the horizontal axis. A jig such as an angle plate provided on the pallet 3 holds a workpiece 10, and when the servo motor MB is driven, the work 10 held by the jig such as an angle plate 3A moves along the B-axis together with the pallet 3. Rotate around a vertical axis.

By driving the servo motors MX, MY, MZ, MB, and MS1 described above based on a preset NC program via the servo control unit, the workpiece 10 and the tool 7 are moved relative to each other, and the workpiece 10 is moved to the desired position. machined to the shape of In this example, each work 10 is attached to each side of a rectangular parallelepiped tombstone 3A, and when machining of one work is completed, the pallet 3 rotates 90 degrees around the B axis and a new work 10 is machined.

A coolant tank 8 is installed below the table 2 to collect coolant, which is a fluid supplied for cooling and cleaning. there is A chip conveyor 9 is arranged at the bottom of the coolant tank 8 , and chips 11 collected in the coolant tank 8 are carried out of the machine by the chip conveyor 9 and collected in a collection container 12 .

The coolant collected in the coolant tank 8 is circulated and supplied to the first and second coolant discharge mechanisms 30 and 40 through the liquid feed pipes 30T and 40T after foreign matters such as chips are removed through a cyclone filter or the like. (See Figure 3).

The first coolant discharge mechanism 30 includes a pair of left and right side walls (side walls) arranged so as to sandwich the main shaft 6 from a direction perpendicular to the extending direction of the axial center of the main shaft 6 among the side surfaces constituting the cover member 200 . ) 201 and 202, respectively.

The first coolant discharge mechanism 30 includes a ball screw 33 and a servomotor 34 that drives the ball screw 33 to rotate. The ball screw 33 is rotatably supported by a pair of supports 32 attached to the ceiling of the cover member 200 via bearings.

The ball screw 33 is screwed with a moving body 35 that moves forward or backward along the axis of the ball screw 33 as the ball screw 33 rotates forward or backward. A vertically oriented liquid supply pipe 36 is supported. Although not shown, a guide rail for holding the moving posture of the moving body 35 that reciprocates along the ball screw 33 is installed so as to support the moving body 35 . The ball screw 33 , the servo motor 34 , the moving body 35 , and the guide rails constitute a moving mechanism for horizontally moving the liquid supply pipe 36 along one of the side surfaces 201 and 202 . Here, the servomotor 34 is also controlled for positioning based on the NC program like the other servomotors.

The liquid supply pipe 36 is formed with three stages of openings 36A, 36B, and 36C in a direction orthogonal to the side surfaces 201 and 202, that is, vertically toward the workpiece 10. The ejection nozzle 31 is attached to an opening indicated by reference numeral 36B in the middle portion, and other openings (reference numerals 36A and 36C in this embodiment) are closed by plugging members 37 . The discharge nozzle 31 and the plugging member 37 are attached so as to be screwed to threaded portions formed in the openings 36A, 36B, and 36C.

A plurality of openings 36</b>A, 36</b>B, 36</b>C are provided to cover a vertical processing area where the workpiece 10 is processed by the tool 7 . In other words, a plurality of them are provided in a range corresponding to the vertical movement range of the machining point. The number of openings 36A, 36B, and 36C is not limited to three stages, but may be two stages, four stages or more. That is, a plurality of openings 36A, .

On the front surface of the main spindle 6, a shavings adhered to the machined part when the workpiece 10 is machined by the tool 7 is removed, and in order to suppress the temperature rise due to the cutting heat generated in the machined part, a A discharge nozzle 41 is provided as a second coolant discharge mechanism 40 for injecting coolant.

As shown in FIG. 1, when a workpiece 10 is fixed to each side surface of a square tombstone 3A in plan view, the workpiece 10 to be processed by the tool 7 is discharged from the discharge nozzle 41 during processing. Coolant is discharged.

However, although the coolant discharged from the discharge nozzle 41 is discharged near the surface of the work 10, it is difficult to remove chips adhering to a portion having a complicated shape such as a hole horizontally formed by the tool 7. Therefore, the above-described first coolant discharge mechanism 30 is provided.

When the machining of one work 10 fixed to the tombstone 3A is completed, the pallet 3 rotates about the B axis by 90 degrees, and the machining of the next work 10 facing the tool 7 is started. At this time, the work 10 that has been machined first has a positional relationship in which it faces the discharge nozzle 31 of the first coolant discharge mechanism 30, so that the coolant discharged from the discharge nozzle 31 is formed on the work 10 in a lateral direction. The amount of movement by the moving mechanism is adjusted so that the jet can be directed toward the hole of the . That is, the moving direction of the liquid supply pipe 36 is set along the moving direction of the horizontal component of the machining point with respect to the workpiece 10 .

Also, when the workpiece 10 on the table 2 moves in the Z-axis direction based on the machining program, the servo motor 34 is controlled so that the discharge nozzle 31 moves in the Z-axis direction in synchronization with the movement of the workpiece 10. It is also possible to

Another embodiment of the present invention will be described below.
In the above-described embodiment, an example in which the first coolant discharge mechanism 30 is arranged in the vicinity of the pair of left and right side walls (side surfaces) 201 and 202 so as to sandwich the main shaft 6 has been described. (Side surface) Only one side wall of 201 and 202 may be provided with the structure.

In the above-described embodiment, an example in which the ball screw 33 is attached to the pair of supports 32 attached to the ceiling of the cover member 200 has been described. A ball screw 33 may be installed along the line. In this case, the coolant discharge mechanism 30 is arranged on the side surfaces 201 and 202 facing each other with the main shaft 6 interposed therebetween.

Although the example in which the work 10 is attached to the tombstone 3A has been described in the above-described embodiment, the work 10 may be attached directly to the pallet 3 .

In the above-described embodiment, an example in which one ejection nozzle 31 is attached to any one of the plurality of openings 36A, . . . A discharge nozzle 31 may be attached to each of a plurality of preselected openings 36A, . . . .

In the above-described embodiment, a horizontal machining center has been described as an example, but the machine tool to which the present invention is applied is not limited to a horizontal machining center. It can also be applied to lathes and compound lathes in which a tool attached to a tool post is approached from a direction perpendicular to the axis to cut a workpiece.

That is, the chip removing device 300 is a device for removing chips from the workpiece 10 machined by relative movement with the tool 7 in the workpiece machining space 210 partitioned by the cover member 200. A coolant discharge mechanism including a discharge nozzle 30N disposed on or near at least one side surface 201 of the side surfaces 201 and 202 and discharging coolant from one side surface 201 toward the other side surface 202 to remove chips from the workpiece 10. 30.

The machine tool chip removal method removes chips from the workpiece 10 machined by relative movement with the tool 7 in the workpiece machining space 210 partitioned by the cover member 200, Chips are removed from the workpiece 10 by ejecting coolant from at least one side surface 201 toward the other side surface 202 of a pair of side surfaces 201 and 202 that face each other with the main shaft 6 interposed therebetween.

Although the embodiments and modes of implementation of the present invention have been described above, the details of the disclosure may be changed in the details of the configuration, and changes in the combination and order of elements in the embodiments and modes of implementation are claimed. Such may be made without departing from the scope and spirit of the invention.

As described above, according to the present invention, it is possible to realize a chip removing device for a machine tool that can efficiently remove chips adhering to intricate places such as laterally cut holes without causing a decrease in machining efficiency. .

1: bed 2: table 3: pallet 3A: tombstone 4: column 5: spindle head 6: spindle 7: tool 8: coolant tank 9: chip conveyor 10: workpiece (workpiece)
11: chips 30: first coolant discharge mechanism 30T: liquid feed pipe 31: discharge nozzle 32: support 33: ball screw 34: servomotor 35: moving body 36: liquid supply pipes 36A, 36B, 36C: opening 37 : Plugging member 40: Second coolant discharge mechanism 40T: Liquid feed pipe 41: Discharge nozzle 100: Machine tool 200: Cover members 201, 202: Side wall (side surface)
210: Machining space

In order to achieve this object, the chip removing device for machine tools according to the present invention removes chips from a machined workpiece through relative movement with a tool in a workpiece machining space partitioned by a cover member. Discharge device disposed on or near at least one of a pair of side surfaces facing each other across the main shaft, for removing chips from the workpiece by discharging coolant from the one side surface toward the other side surface. A coolant discharge mechanism including a nozzle is provided, and the coolant discharge mechanism includes a liquid supply pipe extending in a height direction and formed with an opening for mounting the discharge nozzle, and the liquid supply pipe on the one side surface. a moving mechanism for moving horizontally along the liquid supply pipe, forming a plurality of the openings at different heights along the pipe axis direction extending in the height direction of the liquid supply pipe, and The discharge height of the coolant discharged from the is configured to be adjustable .

A feature of the chip removing method for a machine tool according to the present invention is a chip removing method for a machine tool in which chips are removed from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member. a liquid supply pipe extending in a height direction and having an opening for mounting a discharge nozzle; A plurality of the openings are formed at different heights along the pipe axis direction extending in the height direction of the liquid supply pipe, so that the discharge height of the coolant discharged from the discharge nozzle can be adjusted. The coolant discharge mechanism is disposed on or near at least one of a pair of side surfaces facing each other across the main shaft, and the coolant is discharged from the discharge nozzle from the one side surface to the other side surface. and removing chips from the workpiece .

Claims (8)

A chip removing device for a machine tool that removes chips from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member,
Coolant including a discharge nozzle disposed on or near at least one of a pair of side surfaces facing each other across the main shaft, for removing chips from the workpiece by discharging coolant from the one side surface toward the other side surface. Chip removal device for machine tools equipped with a discharge mechanism. The coolant discharge mechanism includes a liquid supply pipe extending in a height direction and formed with an opening for mounting the discharge nozzle, and a movement mechanism for horizontally moving the liquid supply pipe along the one side surface. 2. The machine tool chip removing device according to claim 1, comprising: 3. A chip removing device for a machine tool according to claim 2, wherein the moving direction of said liquid supply pipe is along the moving direction of the horizontal component of the machining point with respect to said workpiece. 4. Chips of a machine tool according to claim 2 or 3, wherein a plurality of said openings are formed along the pipe axis direction of said liquid supply pipe, and a discharge height of coolant discharged from said discharge nozzle is adjustable. removal device. 5. A chip removing device for a machine tool according to claim 4, wherein a detachable plugging member is attached to each of said openings other than the opening to which said discharge nozzle is attached. 6. The chip removing device for a machine tool according to claim 3, wherein said opening is formed in a range corresponding to a vertical movement range of a machining point with respect to said workpiece. 7. The machine according to any one of claims 2 to 6, wherein said moving mechanism comprises a guide rail attached to the ceiling of said cover member, and a ball screw mechanism for moving said liquid supply pipe along said guide rail. Machine chip remover. A chip removal method for a machine tool for removing chips from a workpiece machined by relative movement with a tool in a workpiece machining space partitioned by a cover member, comprising:
A chip removing method for a machine tool, which removes chips from a workpiece by discharging coolant from at least one side of a pair of side surfaces facing each other across a spindle toward the other side.

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