JPH0727736U - Chip recovery device - Google Patents

Abstract

(57) [Summary] [Purpose] Chips generated during cutting can be collected efficiently.
Further, the present invention provides a chip collecting device for a rolling tool, which is easy to maintain and does not interfere with the throw-away tip replacement or the tool attachment / detachment on the machine. [Structure] A cylindrical casing that covers the rolling tool A is divided into two in the circumferential direction so that the divided casings 2a and 2b can be opened and closed with a hinge as a fulcrum, and this is fitted on the outer periphery of a fixed flange 3 serving as an upper lid. The divided casing 2b is provided with a suction port 12 having a rectangular cross-section that is opened in a wide range, and a sub-chamber 13 that expands in a spiral shape and a discharge duct that extends tangentially from the end of the sub-chamber are connected to the suction port. Furthermore, the inner peripheral surface 7a of the lower ring 7 attached to the casing is inclined, and an air outlet is provided on this surface so that chips are blown up and flown in the outflow direction.
The above objectives will be used to achieve the purpose of the heading.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chip collecting device which is combined with a rolling tool (mainly a face mill) and collects chips generated during cutting while cutting.

[0002]

[Prior art]

 Examples of the chip collecting device mentioned above include those shown in Japanese Utility Model Laid-Open Nos. 2-104915, 2-107452, and 2-145944.

In these devices, the outer periphery of the rolling tool is covered with a cylindrical casing, and the inside of the casing is sucked through a suction port opened in a part of the casing to suck out the generated chips. I am doing it.

Further, in order to improve the flow of chips, a combination of technologies for blowing air from the inside of a rolling tool to blow off the chips (Actual Nos. 4-115517 and 4-115518) is also considered. ing.

[0005]

[Problems to be solved by the device]

 In all of the conventional chip collecting devices, the casing is integrated, so if the milling tool is still attached to the spindle of the machine, the inside cannot be cleaned, inspected, and the throw-away tip mounted on the tool cannot be replaced. In addition, there are some problems that need to be resolved for maintenance, such as the casing is an obstacle and it is difficult to attach and detach the rolling tool.

In addition, since the circular suction port is attached to a part of the casing in a substantially right angle direction, there is also a problem that the chips are not discharged smoothly. In order to improve the chip discharge performance, the chip recovery chamber and the chips are removed. There is a guide member that guides the waste gas into the collection chamber, and then the chips are once introduced into the storage chamber to suck and collect them, or to use the above-mentioned air blow-off together, but with the conventional structure, this is still the case. , There is a discharge obstacle and chips are not discharged smoothly.

Therefore, in order to efficiently collect the chips, a dust collector having a strong suction force was required.

[0008] Therefore, an object of the present invention is to provide a chip collecting device that is easy to maintain, allows throw-away tip replacement on the machine, and further allows chips to be smoothly discharged with a small suction force.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the chip collecting device of the present invention comprises a cylindrical casing that covers the outer periphery of the rolling tool and a fixing flange that is provided outside the main shaft of the processing machine and serves as an upper lid of the casing. Has an inner flange on the upper part that allows the inner diameter surface to be inserted into and removed from the outer periphery of the fixed flange in a concavo-convex manner, and has a lower ring on the lower part that is concentrically arranged with the rolling tool to bring the inner end close to the cutting edge of the rolling tool. However, the entire casing including the inner flange and the lower ring is divided into two in the circumferential direction at the approximate center, and the divided casing can be opened and closed with a hinge portion provided on one side of the divided surface as a fulcrum, and one of the divided portions is divided. The casing has a rectangular cross-section chip suction port that opens widely in the circumferential direction, a sub-chamber that gradually expands outward from the suction port in the direction of rotation of the cutting tool, and the end of this sub-chamber. A discharge duct extending in the tangential direction is provided, and further, the inner peripheral surface of the lower ring inclines in a direction of upward spread, and air is obliquely directed to the inclined inner peripheral surface in the substantially rotating direction of the cutting tool. The structure is such that a plurality of air outlets that blow upward are provided at a predetermined pitch in the circumferential direction.

The casing is composed of a fixed cylinder to which the inner flange is attached and a movable cylinder to which the lower ring is attached. Further, the movable cylinder which is slidably fitted to the fixed cylinder is used as a moving point. If the positioning means for fixed placement is added so that it can be expanded and contracted, it is possible to cope with changes in the thickness (height) of the rolling tool, and the range of use of the device is expanded.

[0011]

[Action]

 Since the casing is split in half and opened and closed, it is possible to open the split casing and clean the inside without removing the rolling tool from the spindle of the machine. In addition, when the split casing is opened, at least half of the tool is opened to the outside (opening and removing the casing opens the entire tool), making it possible to replace the throw-away tip on the machine, and the tool for the machine spindle. It can be attached and removed without any restrictions.

Further, since the suction port is provided in a wide area with a rectangular cross section, the suction chamber is connected to a sub chamber that expands with a gentle roundness, and the discharge duct is drawn out tangentially from the end point of the sub chamber, the generated chips are generated. With its own outflow energy, it enters the suction port, flows into the sub-chamber, is guided by the inner wall of the sub-chamber, and is gently redirected and discharged with little resistance. In the conventional recovery device in which a long extending chip is forcibly redirected by the guide member to the recovery chamber, the outflow energy of the chips sharply declines, but in the present invention that minimizes outflow obstacles, that energy is reduced. Effectively utilized for discharge.

In addition, since the chip windsock used together with the conventional device blows air to the cutting portion and carries the chips on the reflected flow, it is not possible to expect an efficient windsink, but in the present invention, the lower ring is used. Since air is blown out obliquely upward from the blowout port provided on the inclined inner peripheral surface of the tool toward the approximate rotation direction of the tool, the chips are directly blown up and the airflow in the discharge direction is smoothly taken. Therefore, the exhaust energy is amplified by the assistance of the air flow, and as a result of these things acting effectively, the exhaust efficiency is improved even if the suction force is small.

Further, by supplying cooled air (which is effective even at room temperature), it also has an effect of lowering heat generation during cutting, such as cast iron cutting, so that heat from the discharge port to the dust collector is affected. Can be made smaller.

[0015]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the illustrated chip recovery device 1 includes a cylindrical casing 2 that covers the outer periphery of the rolling tool A, and a fixing flange 3 that serves as an upper lid of the casing. There is. The fixed flange 3 is concentrically fitted to the fixed sleeve B of the main shaft of the processing machine, and is hung by a plurality of suspension bolts 5 on a bracket 4 attached to the fixed part of the processing machine.

The casing 2 has an inner flange 6 on the upper part and a lower ring 7 on the lower part. The inner flange 6 is attached to the outer periphery of the fixed flange 3 via the uneven fitting portion 3a. In the concave-convex fitting portion 3a, the projection on the inner circumference of the inner flange is fitted in the groove provided on the outer circumference of the fixed flange 3 here, and can be freely inserted and removed. This is the same even if the positional relationship between the protrusions and the grooves is reversed from the figure.

The lower ring 7 has its inner end brought as close as possible to the cutting edge of the rolling tool A in order to prevent the chips from falling by their own weight. As shown in FIGS. 3, 5, and 6, the inner peripheral surface 7a of the lower ring 7 is inclined in the direction of upward spread so as to have a chip guiding effect, and further, an air outlet is provided substantially at the center of this surface. 8 are provided. In the case of the present invention in which air is blown out from the lower side even if the air blowout port 8 is parallel to the plane parallel to the cutting surface, the effect of blowing up the chips can be obtained, but as shown in FIG. It is more preferable to set the angle of. If this angle is too tight, it will be difficult for air to reach the cutting part, so θ should be set to 30 ° or less.

As shown in FIG. 4, a plurality of air outlets 8 are provided at a predetermined pitch in the circumferential direction toward the rotation direction of the cutting tool (slightly inward). Here, the air is supplied partially through the upper surface of the inner ring 7 and through the tube 9 along the outer circumference of the ring. The tube 9 may be either a rigid tube or a flexible tube, but at least the portion 9a needs to be flexible for opening and closing the casing.

The casing 2, including the inner flange 6 and the lower ring 7 described above, is divided into two in the circumferential direction at substantially the center. The split casings 2a and 2b are provided with a hinge portion 10 (see FIG. 1) on one side of the split surface so that at least one split casing 2a can be opened and closed as shown by the chain line in FIG. is there. Further, on the other side of the split surface, an adjust fastener 11 is provided which connects the split casings 2a and 2b at the closed position.

As shown in FIG. 7, the divided casing 2b is provided with a suction port 12 having a rectangular cross section that opens over a wide area in the circumferential direction, and a sub chamber 13 and a discharge duct 14 are sequentially connected to the suction port 12. ing. The sub-chamber 13 gradually swells outward in a spiral shape in the direction of rotation of the rolling tool A, so that chips can be introduced without obstruction and the direction can be changed with less resistance due to the gently curved peripheral wall.

The exhaust duct 14 extends tangentially from the end of the sub chamber 13. When the chip collecting device 1 is mounted on the processing machine in a state where the discharge duct 14 is substantially parallel to the feed direction of the rolling tool and the duct outlet is in the opposite direction to the feed direction, the suction port 12 runs along the cutting part. The generated chips smoothly flow into the sub chamber 13 and are efficiently recovered. If this discharge duct 14 is connected to a dust collector (not shown) via a flexible duct, the split casing 2b is also allowed to rotate at the hinge fulcrum, and the entire casing 2 can be removed from the fixed flange 3.

Note that, as shown in FIG. 3, the exemplified chip collecting device is configured such that the body of the casing 2 is composed of an inner cylinder 2-1 and a slidable outer cylinder 2-2, and is made expandable. . The inner flange 6 is attached to the upper end of the inner cylinder 2-1 and the lower ring 7 is attached to the lower end of the outer cylinder 2-2, and the inner cylinder 2-1 and the outer cylinder 2-2 are passed through elongated holes (not shown). The bolts 15 (see FIGS. 1 and 2) are fixed to each other. The height of the casing 2 is changed by loosening the bolt 15 and adjusting the height position of the outer cylinder with the positioning means 16 of the outer cylinder 2-2 (in the figure, it is an adjusting bolt fixed to the inner flange 6). Therefore, the chip height can be set to match the height change of the rolling tool A, and the chips can always be collected under the optimum conditions.

[0024]

As described above, in the chip collecting device of the present invention, the casing is divided into two parts and can be opened and closed, so that the inside can be easily cleaned, inspected, and the throw-away tip can be replaced on the machine.

Further, if one of the split casings is opened or the entire casing is removed from the fixing flange, the tool can be attached to and detached from the machine spindle without any trouble, and the tool can be replaced quickly.

Further, since the chips are allowed to smoothly flow into the sub-chamber so that the chips can be suctioned without difficulty, the efficiency of collecting the chips can be improved without increasing the suction force of the dust collector.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a chip collecting device of the present invention.

FIG. 2 is a side view of the above.

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

FIG. 4 is a plan view of the lower ring.

FIG. 5 is a sectional view of an air outlet of the lower ring.

FIG. 6 is a perspective view showing a part of a lower flange.

FIG. 7 is a view of a split hood having a suction port as seen from the split surface side.

[Explanation of symbols]

 1 Chip Collecting Device 2 Casing 3 Fixed Flange 4 Bracket 5 Hanging Bolt 6 Inner Flange 7 Lower Ring 7a Inner Surface 8 Air Blowout 9 Tube 9a Flexible Tube 10 Hinge Part 11 Adjuster Fastener 12 Suction Port 13 Sub Chamber 14 Discharge Duct 15 Bolt 16 Positioning means

Claims (2)

[Scope of utility model registration request] 1. A cylindrical casing that covers the outer circumference of a rolling tool, and a fixing flange that is provided outside the main shaft of a processing machine and serves as an upper lid of the casing. Each has an inner flange that fits in the outer periphery so that it can be inserted and removed freely, and a lower ring that is concentrically arranged with the rolling tool at the bottom to bring the inner end close to the cutting edge of the rolling tool. The entire casing is divided into two in the circumferential direction at the approximate center, and the divided casing can be opened and closed with a hinge portion provided on one side of the divided surface as a fulcrum.
In addition, in one of the split casings, a chip suction port having a rectangular cross-section that opens over a wide area in the circumferential direction, a sub-chamber that gradually expands outward from the suction port in the direction of rotation of the rolling tool, and this sub-chamber Is provided with a discharge duct extending in a tangential direction from the end of the lower ring, and further, the inner peripheral surface of the lower ring is inclined in the upward spreading direction, and air is directed to the inclined inner peripheral surface in the substantially rotating direction of the rolling tool. A chip collecting device in which a plurality of air outlets that blow out obliquely upward are provided at a predetermined pitch in the circumferential direction. 2. The casing is composed of a fixed cylinder for mounting the inner flange and a movable cylinder for mounting the lower ring, and the movable cylinder slidably fitted to the fixed cylinder is fixed at a moving point. The chip collecting device according to claim 1, further comprising positioning means for causing the chip collecting device.