JPH0871884A - Dust collecting hood - Google Patents

Abstract

PURPOSE: To provide a dust collecting hood high in durability and good in floow-up to the vertical movement of the upper surface of a work piece in a vertical end mill. CONSTITUTION: This dust collecting hood is attached to the tool attaching part 1 of a vertical end mill, and is composed of an attaching part 5, a connection part 6, and a sucking part 1. The attaching part 5 composes a sucking chamber 10, the sucking part 7 is attached while surrounding the periphery of a tool 3, and an annular brush 15 is attached to the lower end of the sucking part 7 to compose the hood. A brush 17 composing the annular brush 15 is located into a tapered state wherein a lower part is expanded outside. The annular brush 15 can be located on the lower end of a vertically elastic part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting hood for sucking and removing chips generated during processing by a vertical end mill (including a drill machine).

[0002]

2. Description of the Related Art Cutting chips generated by a vertical end mill are washed away with a large amount of machining fluid in large machine tools. In the processing of a work that is troublesome to post-process, a local processing is adopted in which a dust collecting hood is provided with a similar device for each tool location to suck and process the generated cutting chips.

As a structure of such a local processing, the actual construction of Sho 56
-52654 (using bellows) and Shokai 62-
Various things such as 198840 (using an annular brush) have been proposed. Although the bellows smoothly follows the vertical movement of the work top surface, the outside air inlet required for suction must be provided somewhere, and when the work is moved, the structure of the bottom end of the bellows that contacts the work top surface. It is easier to use the ring brush because it requires some work. However, in the case of an annular brush, if the bristle length becomes longer than a certain length, the bending direction of each brush that composes the brush becomes uncertain, and it enters the inside as the work moves or is bent inward by the suction force. And get caught in a rotating tool and get damaged early. If the fluff is shortened in order to avoid this, there is a problem that it becomes difficult to follow the vertical movement of the work surface.

[0004]

SUMMARY OF THE INVENTION The present invention is to provide a dust collecting hood using an annular brush, which has high durability and good followability to the vertical movement of the tool mounting portion. It is an issue.

[0005]

[Means for Solving the Problems]

(1) An attachment portion to the tool attachment portion, a connection portion to the vacuum device, and a suction portion that surrounds the periphery of the tool and opens downward. The suction part has an annular brush at the lower end. The brush of the ring-shaped brush is arranged in a tapered shape whose lower part spreads outward, and its tip is provided so as to be able to contact the work. (2) It is provided with a mounting portion to the tool mounting portion, a connecting portion to the vacuum device, and a suction portion that surrounds the periphery of the tool and opens downward. The suction part has an annular brush at the lower end. The brush of the circular brush is curled outward, and
The tip is provided so that it can contact the work.

(3) A tool mounting portion, a connecting portion to the vacuum device, and a suction portion that surrounds the periphery of the tool and opens downward. The suction part is composed of a vertical expansion / contraction part and an annular brush attached to the lower ends of the vertical expansion / contraction part. The annular brush is provided so that the brush can be brought into contact with the work with the brush in the vertical direction. (4) The vertical expansion / contraction part of the dust collecting hood may be bellows. (5) The vertical expansion / contraction part of the dust-collecting hood may be telescopically combined to form a cylindrical body that can be vertically moved between them.

(6) In the dust collecting hood, the lower end portion of the brush forming the annular brush may be curled outward. (7) In the dust collecting hood, the brush that constitutes the annular brush is extended such that the lower end is longer than the lower end of the tool. Then, a ring may be attached to the base side of the annular brush, and the bending range of the brush forming the annular brush may be limited depending on the position of the ring.

[0008]

The annular brush not only imparts expansion and contraction performance to the suction part, but also exerts the functions of smooth contact between the work and the suction part, sealing of cutting chips, and an outside air inlet. The vertical expansion / contraction part imparts a wide range of vertical expansion / contraction performance to the suction part.

[0009]

1 shows the lower part of a tool mounting portion 1 in a vertical end mill, in which a dust collecting hood 4 (first embodiment) is mounted, and a tool 3 is mounted on a spindle 2 which can be moved up and down. It is installed. The dust collecting hood 4 includes a mounting portion 5 for the tool mounting portion 1 and a connecting portion 6 for an exhaust device (not shown).
Further, the suction portion 7 facing the work is formed. The mounting portion 5 is tubular and is fitted from below into a jig fixing O-ring 8 that has been previously attached to the tool mounting portion 1 and is detachably attached by a jig fixing clip 9. The mounting portion 5 constitutes a suction chamber 10 inside. The suction chamber 10 communicates with a connecting portion 6 and a suction portion 7 formed on the side surface of the mounting portion 5. The connection portion 6 faces the connection port 13 of the nozzle attachment / detachment unit 11 located at the end of the exhaust device, and the air actuator 1 included in the unit 11 is provided.
The receiving port 13 is extended at 2 and the vacuum device is connected to the suction chamber 10.

The suction portion 7 surrounds the main shaft 2 and the tool 3, and in this embodiment, an annular brush 15 is provided at the lower end of a tubular member 14 forming a part of the suction portion 7, and the brush of the annular brush 15 is provided. As shown in the figure, 17 is arranged in a taper shape whose lower part spreads outward. The tip of the brush 17 is the work 1
It has a sufficient length so that it can come into contact with 6. The dust collecting hood 4 is attached using the jig fixing clip 9 when the vertical end mill is in a standby state for work and the tool attaching portion 1 is retracted upward. Prior to starting the work, the air actuator 12 of the nozzle detaching unit 11 is driven to connect the suction chamber 10 to the exhaust device. Then,
The vertical end mill is driven, the spindle 2 and the tool 3 are rotated, and machining is performed while the vertical movement of the spindle 2 and the step movement of the work 16 are repeated.

At this time, the suction portion 7 of the dust collecting hood 4 is
The tip of the annular brush 15 surrounds the tool 3,
In contact with the upper surface of 6 to prevent chips from scattering to the outside, it also serves as an outside air intake port for suction. The contact between the dust collecting hood 4 and the work 16 is smooth because of the annular brush 15, and even if there is a step or a wavy surface on the work, the shape can be followed. Moreover, since the brush 17 of the annular brush 15 has a taper shape in which the lower portion thereof spreads outward in advance, a strong resistance is given to being caught in the work 16,
Alternatively, no matter which direction the tool 3 is moved, the brush 17 is extremely unlikely to be caught in and damaged by the rotating tool 3. Therefore, the durability is improved. The chips are placed on the air flow and taken into the exhaust device for processing.

FIG. 2 shows a second embodiment, which is different from the first embodiment in that the brush 17 of the annular brush 15 is curled outward. Of course, even if it is curled, it has a sufficient length so that the tip can contact the work 16. Since the other structure is almost the same as that of the first embodiment, detailed description will be omitted. Since the brush 17 is curled outward, there is a strong resistance to being caught inside, and in this case as well, it is very unlikely that the brush 17 will be caught in the rotating tool 3 and damaged, and durability is improved. .

FIG. 3 is different from the first embodiment in the construction of the suction portion 7 in the third embodiment. The suction part 7 encloses the periphery of the main shaft 2 and the tool 3, and is composed of an up-and-down elastic part 18 and an annular brush 15. In this embodiment, the vertical expansion / contraction part 18 is a bellows 18. The bellows 18 is a molded product such as a flexible synthetic rubber and has excellent elasticity in the vertical direction, and is fixed to the lower portion of the dust collecting hood body 5 at the upper end portion. The upper portion of the annular brush 15 is further attached to the lower portion of the bellows 18. The annular brush 15 is
Brushes 17 (bristles constituting the brush) 17 having a length that reaches the upper surface of the work 16 are arranged in an annular shape with the bristles in the vertical direction, and surround the periphery of the tip of the tool 3. The brush is made of highly rigid nylon. Since the other structure is almost the same as that of the first embodiment, detailed description will be omitted.

Prior to the start of work, the nozzle attaching / detaching unit 1
The air actuator 12 of No. 1 is driven and the suction chamber 10
Is connected to the exhaust system. Then, the vertical end mill is driven, the spindle 2 and the tool 3 are rotated, and machining is performed while the vertical movement of the spindle 2 and the step movement of the work 16 are repeated.

At this time, the suction portion 7 of the dust collecting hood 4 is
The tip of the annular brush 15 surrounds the tool 3,
The cutting dust is prevented from scattering to the outside in contact with the upper surface of 6, and serves as an outside air intake port for suction, and the bellows 18 serves as a passage for sucked air and cutting dust. The contact between the dust collecting hood 4 and the work 16 is smooth because of the annular brush 15, and even if there is a step or a wavy surface on the work, the shape can be followed. The chips are placed on the air flow and taken into the exhaust device for processing. The bellows 18 flexibly expands and contracts to reduce the load on the annular brush 15. Further, the expansion and contraction of the bellows 18 allows the work 16 to be relieved without making the bristle of the brush 17 so long.
Since the upper surface of the
Has short hair and is less likely to be caught in a rotating tool. This increases the durability of the annular brush 15.

FIG. 4 shows a fourth embodiment, which is characterized by the structure of the vertical expansion / contraction part 18 in comparison with the third embodiment. That is, the vertical expansion / contraction part 18 is configured such that the tubular bodies are telescopically combined so as to be vertically movable between each other.
The other structure is not different from the third embodiment. The vertical elastic member 18 of the telescopic cylinder flexibly expands and contracts to reduce the load on the annular brush 15. However, as compared with the case of the bellows 18, the direction perpendicular to the axial direction (horizontal direction).
When the work 16 has a large frictional force with the annular brush 15, it is less likely to buckle laterally. Therefore, when the surface of the work 16 is rough, it can be used in place of the bellows 18. Other actions and effects are almost the same as in the case of the third embodiment.

5 and 6 show the bellows 18 and the annular brush 15 in the third embodiment. This fifth embodiment is characterized by the brush 17 of the annular brush 15, and
The lower end of 7 is curled in a round shape so that the lower end is almost one rotation in advance. The brushes 17 thus curled outward have a tendency to slide outward when pushed from above, so that when the tool attachment 1 is moved downwards, the brushes 17 of the annular brush 15 are all removed as the bellows 18 is compressed. Bending outward and being less likely to be caught in the tool 3. The brush 17 that curls the tip is an annular brush 1.
Not only all of the brushes 17 that make up No. 5 but also the inner layer, the middle layer, and the outer layer are effective.

FIG. 7 shows a portion of the tool mounting portion 1 in the sixth embodiment, which is characterized by the structure of the annular brush 15. The other structure is not different from that of the first embodiment. The ring-shaped brush 15 is attached to the lower part of the bellows 18 for the work 1.
The brush 17 having a length that reaches the upper surface of 6 is arranged in an annular shape with the bristle legs in the vertical direction. The brush 17 has a length extending below the lower end of the tool 3, and A ring 19 is attached to the base side of the annular brush 15.
The ring 19 has legs 20 facing upwards at several places,
Reference numeral 0 is inserted through a flange portion 21 below the bellows 18, and can be moved vertically with respect to the flange portion 21 and can be stopped at an arbitrary position.

In this annular brush 15, when the dust collecting hood 4 is attached to the tool mounting portion 1 and the tool 3 is at the operation start position (the state of FIG. 3), the tip of the brush 17 is already on the upper surface of the work 16. Since the ring 19 is bent, the ring 19 is first lifted upward to adjust the bending direction of the brush 17 to the outside, and then the ring 19 is moved downward so that the annular brush 15 bends the brush 17. Stop at a position where the diameter increases. The stop position depends on the length and rigidity of the brush 17, and the temperature around the tool. Brush 1 by doing in this way
The bending range of 7 is limited by the ring 19, and the work 1
The brush 17 is not caught inside the annular brush 15 due to the movement of 6 or the suction force. This structure can also be adopted in the structures of other embodiments such as the first embodiment.

The above is an embodiment, and the present invention is not limited to the illustrated specific configuration. The attachment structure of the dust collecting hood 4 to the tool attaching portion 1 is arbitrary, and the exhaust device may be connected by connecting a hose directly to the dust collecting hood 4. Regarding the relationship between the tool 3 and the work 16, it has been described that the work side moves, but there are some vertical end mills in which the tool side moves with respect to the work 16. Although not described, the present invention can be applied to this case as well.

[0021]

According to the constitutions of claims 1 and 2, the brushes constituting the annular brush are less entangled, and the durability of the annular brush is improved. According to the configurations of claims 3 to 5, since the vertical expansion / contraction part and the annular brush are combined to form the suction part of the dust collecting hood, the vertical expansion / contraction part bears a considerable portion of the vertical movement of the suction part, and the annular brush The brush is not greatly bent. As a result, the wear of the annular brush due to strong bending and winding on the tool is reduced, and the durability is increased. Further, the contact between the work and the dust collecting hood is smooth by the annular brush, and the annular brush also serves as an inlet for outside air. When the vertical expansion / contraction part has a telescopic tubular structure, the function as a dust collecting hood can be maintained even when the frictional force between the annular brush and the work is large.

According to the structure of claim 6, even if the work moves or the annular brush repeatedly moves up and down, it is rare that the brush forming the annular brush bends inward. Wear is further reduced. According to the configuration of claim 7, the position of the ring can be adjusted while observing the contact state between the work and the annular brush, and the annular ring can be used with the bending range of the brush being in an optimum state.

[Brief description of drawings]

FIG. 1 is a front view showing a part in section (first embodiment).

FIG. 2 is a front view showing a part in section (second embodiment).

FIG. 3 is a front view showing a part in section (third embodiment).

FIG. 4 is a front view showing a part in section (fourth embodiment).

FIG. 5 is a schematic front view of a part (fifth embodiment).

FIG. 6 is a schematic front view of a part (the fifth embodiment, bending position).

FIG. 7 is a front view showing a part in section (sixth embodiment).

[Explanation of symbols]

 1 Tool mounting part 2 Spindle 3 Tool 4 Dust collecting hood 5 Mounting part 6 Connection part 7 Suction part 8 Jig fixing O-ring 9 Jig fixing clip 10 Suction chamber 11 Nozzle detaching unit 12 Air actuator 13 Receptacle 14 Cylindrical member 15 Ring brush 16 Work piece 17 Brush 18 Vertical expansion / contraction part 19 Ring 20 Leg 21 Flange part

Claims (7)

[Claims] 1. A tool attachment part, a connection part to a vacuum device, and a suction part that surrounds the periphery of the tool and opens downward. The suction part includes an annular brush attached to the lower end. A dust collection hood characterized in that the brush brush is arranged in a taper shape where the lower part spreads outward and the tip is provided so that it can contact the work. 2. A brush for an annular brush, comprising: an attachment portion for attachment to a tool attachment portion, a connection portion for attachment to a vacuum device, and a suction portion which surrounds the periphery of the tool and opens downward. Is a dust collecting hood that is curled outward and the tip is provided so that it can contact the work. 3. A tool attachment part, a connection part to a vacuum device, and a suction part that surrounds the periphery of the tool and opens downward. The suction part is attached to the lower end of the vertical expansion / contraction part and the vertical expansion / contraction part. It consists of a circular brush
The dust collecting hood is characterized in that the annular brush is provided so that the brush can be brought into contact with the work with the brush in the vertical direction. 4. The dust collecting hood according to claim 3, wherein the upper and lower expandable portions are bellows. 5. The dust-collecting hood according to claim 3, wherein the vertical expansion / contraction part is telescopically combined and is composed of a tubular body that can be moved up and down freely. 6. The dust collecting hood according to any one of claims 3 to 5, wherein a lower end portion of the brush forming the annular brush is curled outward. 7. The brush forming the annular brush has a lower end extending longer than the lower end of the tool, and the annular brush has a ring attached to the base side, and the bending range of the brush forming the annular brush depends on the position of the ring. The dust collecting hood according to claim 1, wherein the dust collecting hood is limited.