JP5940846B2 - Drill driving device and drill driving method - Google Patents

Description

  Embodiments described herein relate generally to a drill driving device and a drill driving method.

  Conventionally, as one of hand tools for driving a drill, a drill driving device capable of supplying cutting oil to a flow path formed in the drill is known. Some hand-held drill driving devices have a mechanism for feeding in the axial direction of the drill. Many drill driving devices capable of performing such a feed operation of a drill have a structure in which a cutting oil supply port moves together with a holder for holding the drill. For this reason, cutting oil, such as mist air, can be supplied into the drill from the oil supply port in a state where a desired feed is applied to the drill (see, for example, Patent Document 1).

JP 2010-228049 A

  When drilling a workpiece using a hand-held drill driving device, it is an important issue to appropriately remove chips. The same applies to a drill driving device that is attached to and detached from an automatic drilling device.

  Therefore, an object of the present invention is to provide a drill driving device and a drill driving method capable of supplying a cooling medium as needed while feeding a tool and appropriately removing chips. .

A drill driving device according to an embodiment of the present invention includes a fixing unit, a moving mechanism, a cooling medium or lubricating medium supply unit, a casing, and a restraining unit. The moving mechanism holds a tool and moves the tool in the axial direction with respect to the fixed portion. The supply unit of the cooling medium or the lubricating medium moves together with the moving mechanism. The casing is fixed to the fixing portion, covers at least the tip side of the tool of the moving mechanism, and forms a branch path for collecting dust. The suppression means suppresses a decrease in the wind pressure for dust collection due to movement of at least one of the supply unit and the moving mechanism. The drill driving device is a device in which a plurality of gaps for projecting the supply unit are provided in a circumferential direction on a side surface of the casing. Furthermore, the drill driving device is a cylindrical flexible cover that closes the plurality of gaps by opening and closing following the movement of the supply unit at least during dust collection, and the movement range of the supply unit The flexible cover having a size that fits the outer shape of the casing provided with one notch on the side surface is provided as the restraining means .
The drill driving method according to the embodiment of the present invention includes a step of holding a tool by a moving mechanism and moving the moving mechanism in the axial direction of the tool with respect to a fixed portion, and a supply unit that moves together with the moving mechanism Supplying a cooling medium or a lubricating medium via a dust collecting step, collecting dust via a dust collecting branch formed in a casing fixed to the fixed part, and at least the supply part and the moving mechanism And a step of suppressing a decrease in the wind pressure for dust collection due to one movement. In the drill driving method, a plurality of gaps for projecting the supply unit are provided in a circumferential direction on a side surface of the casing. Furthermore, the drill driving method is a cylindrical flexible cover that closes the plurality of gaps by opening and closing following the movement of the supply unit at least during dust collection, and the movement range of the supply unit In order to prevent a decrease in wind pressure for dust collection by providing the casing with the flexible cover having a size that fits the outer shape of the casing. It is.

  According to the drill driving device and the drill driving method according to the embodiment of the present invention, it is possible to supply a cooling medium as needed while feeding a tool, and to appropriately remove chips.

1 is a cross-sectional view showing a configuration of a drill driving device according to a first embodiment of the present invention. The top view in the state which covered the casing shown in FIG. 1 with the protective cover. FIG. 5 is a cross-sectional view showing a configuration of a drill driving device according to a second embodiment of the present invention. FIG. 4 is a left side view of the check valve shown in FIG. 3. FIG. 5 is a cross-sectional view showing a configuration of a drill driving device according to a third embodiment of the present invention.

  A drill driving device and a drill driving method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a cross-sectional view showing a configuration of a drill driving device according to a first embodiment of the present invention.

  The drill driving device 1 is a hand-held hand tool capable of drilling a workpiece 3 to be processed by applying a feed in a rotation axis direction to a rotary tool 2 such as a drill. Therefore, the drill driving device 1 is configured by providing the body 5 with a grip 4 for an operator to grasp with a hand.

  The body 5 includes a fixed portion 6 and a moving mechanism 7. The fixing part 6 is fixed to the grip 4. On the other hand, the moving mechanism 7 is configured to move in the axial direction of the tool 2 with respect to the fixed portion 6 and to rotate around the axial direction of the tool 2. A mechanism for moving and rotating the moving mechanism 7 is arbitrary. For example, as a mechanism for moving the moving mechanism 7, an air-type cylinder mechanism can be mentioned. On the other hand, as a mechanism for rotating the moving mechanism 7, an air-type motor can be mentioned. Accordingly, a power source 8 for moving and rotating the moving mechanism 7 is appropriately connected to or installed in the body 5.

  A collet holder 10 for holding the tool 2 via a collet 9 is provided at the tip of the moving mechanism 7. That is, the collet 9 can be held by the collet holder 10 in a state where the shank of the tool 2 is inserted into the collet 9. Thereby, the tool 2 can be firmly held by the moving mechanism 7 of the drill driving device 1. Furthermore, the tool 2 can be moved in the axial direction with respect to the fixed portion 6 by the movement of the moving mechanism 7. That is, an axial feed operation can be given to the tool 2.

  On the other hand, the tool 2 rotates when the moving mechanism 7 integrated with the tool 2 rotates. For this reason, the workpiece 3 can be drilled using the drilling jig 12 or the like into which the bush 11 is press-fitted.

  Moreover, the drill drive device 1 has a function of supplying a cooling medium such as cooling mist, cutting oil, oil-based coolant, and water-soluble coolant into the tool 2 or in the vicinity of the tool 2 as necessary. For this purpose, the body 5 of the drill driving device 1 is provided with a cooling medium supply unit 13. Then, the cooling medium can be supplied in the tool 2 or in the vicinity of the tool 2 by connecting the nozzle connected to the cooling medium supply system to the supply unit 13.

  The cooling medium is injected to the workpiece 3 through a path depending on the structure of the tool 2 such as whether or not a flow path of the cooling medium is formed in the tool 2. In a typical example, the cooling medium is guided to a flow path in the tool axial direction formed in the tool 2. Accordingly, a cooling medium flow path X is formed from the supply section 13 through the tool 2 to the work 3 from the tip of the tool 2.

  The tool 2 is fed by driving the moving mechanism 7. Accordingly, the cooling medium supply unit 13 is fixed in the vicinity of the collet holder 10 of the moving mechanism 7 that holds the tool 2. Thereby, a cooling medium can be supplied to the tool 2 at an arbitrary position in the feed direction F from the shank side of the tool 2. In other words, the cooling medium supply unit 13 is configured to move together with the moving mechanism 7 and supply the cooling medium regardless of the position of the tool 2.

  Furthermore, the drill driving device 1 is configured so that a dust collection system can be connected as necessary. That is, the drill driving device 1 can be provided with a dust collecting function for removing chips. Therefore, a cylindrical casing 14 that covers at least the distal end side of the tool 2 of the moving mechanism 7 and the shank side of the tool 2 protruding from the moving mechanism 7 can be fixed to the fixing portion 6 of the body 5.

  A through hole 15 for projecting the tool 2 to the outside is provided at the tip of the casing 14. When the casing 14 is attached to the body 5, the tool 2 protrudes from the casing 14, and the workpiece 3 can be drilled by the tip of the tool 2. The casing 14 that protects the moving mechanism 7 together with the shank side of the tool 2 is generally referred to as a nose piece.

  Further, a gap 16 is provided on the side surface of the casing 14 for projecting the cooling medium supply unit 13 to the outside. The supply unit 13 moves in the feed direction F of the tool 2 together with the moving mechanism 7. Therefore, the length of the gap 16 for passing the supply unit 13 is set to a length that can cover the movable range of the supply unit 13. Further, a plurality of gaps 16 can be provided on the side surface of the casing 14 in the circumferential direction so that the supply unit 13 can protrude from the casing 14 in various directions.

  A dust collecting branch 17 is formed at an arbitrary position of the casing 14. Then, the dust collecting branch 17 can be connected to the dust collecting system by a dust collecting hose or the like. Thereby, intake for dust collection can be performed from the branch path 17 of the casing 14.

  However, the casing 14 is provided with a single or a plurality of gaps 16 for projecting the supply unit 13. Therefore, the side surface of the casing 14 is covered with a protective cover 18 that can smoothly move the supply unit 13 in the feed direction F of the tool 2 while closing the gap 16 for projecting the supply unit 13 during dust collection. it can.

  FIG. 2 is a top view of the casing 14 shown in FIG.

  As shown in FIGS. 1 and 2, the protective cover 18 can be configured by providing a cut 19 on a side surface of a cylindrical member having flexibility or elasticity such as rubber. That is, the inner diameter of the protective cover 18 is a size that fits the outer diameter of the casing 14. Further, a cut 19 that covers the movable range of the supply unit 13 is provided on the side surface of the protective cover 18.

  For this reason, the supply part 13 can move in the feed direction F of the tool 2 in a state of protruding through the gap 16 of the casing 14 and the cut 19 of the protective cover 18. Moreover, when the atmospheric | air pressure in the casing 14 becomes smaller than atmospheric pressure, the edge part which forms the notch 19 of the protective cover 18 will bend to the casing 14 side. Thereby, the gap 16 of the casing 14 at the position where the supply unit 13 does not exist is closed by the protective cover 18.

  Accordingly, when intake air for dust collection is performed from the branch passage 17 of the casing 14 with the casing 14 whose side surface is protected by the protective cover 18 being attached to the body 5, the air pressure in the casing 14 is reduced by the intake air and supplied. The gap 16 of the casing 14 at a position where the portion 13 does not exist is closed by the protective cover 18. As a result, a flow Y of airflow is generated from the through hole 15 of the casing 14 for projecting the tool 2 toward the dust collecting branch 17. That is, when intake is performed by driving the dust collection system, the leakage of the air from the gap 16 for the cooling medium supply unit 13 is reduced to a negligible amount due to the bending of the protective cover 18 due to intake.

  Further, even if the cooling medium supply unit 13 is moved by applying a feed operation to the tool 2, the gap 16 of the casing 14 is closed by the cut 19 of the protective cover 18 that follows the movement of the supply unit 13. That is, the flexible protective cover 18 provided with the cuts 19 along the movement path of the cooling medium supply unit 13 functions as a suppression unit that suppresses a decrease in wind pressure for dust collection due to the movement of the supply unit 13. For this reason, it can perforate | punch while giving a feeding operation | movement to the tool 2 and supplying a cooling medium, and can absorb the dust of the chip produced by the perforation with favorable dust collection efficiency.

  From the standpoint of further reducing air leakage from the gap 16 for the cooling medium supply unit 13 and maintaining a good wind pressure for dust collection, at least supply of the cooling medium to the branch path 17 for collecting dust is performed. It is desirable to provide it on the tip side of the tool 2 relative to the portion 13. More preferably, it is provided near the tip of the casing 14 as shown in FIG.

  In other words, the drill driving device 1 as described above has a function of supplying a cooling medium to the vicinity of the tip of the tool 2 that moves in the tool axis direction, and feeds the tool 2 together with the tool 2 so that chips generated by cutting can be absorbed. A gap 16 of the casing 14 provided for the movement of the operating cooling medium supply unit 13 is covered with a flexible protective cover 18.

  For this reason, according to the drill drive device 1, one or both of supply of a cooling medium and dust suction operation can be performed as necessary during drilling. That is, the cooling medium supply nozzle is connected to the supply unit 13 of the drill driving device 1, and even if the supply unit 13 moves with the movement of the tool 2, sufficient leakage of air from the casing 14 during dust absorption is achieved. To a certain extent. For this reason, the dust suction function can be operated while maintaining the cooling medium supply function.

(Modification)
In the above-described example, the drill driving device 1 provided with the flexible protective cover 18 as a suppression means for suppressing the decrease in the wind pressure for collecting dust due to the movement of the cooling medium supply unit 13 has been described. However, if the function of suppressing wind pressure reduction for dust collection is obtained, the drill driving device 1 can be provided with a suppression means having another structure.

  For example, the plurality of gaps 16 for movement of the supply unit 13 provided in the casing 14 may be closed with a protective cover having flexibility and notches. However, if a plurality of gaps 16 are closed using a single cylindrical protective cover 18, the protective cover to be provided for movement of the supply unit 13 can be cut into one. For this reason, the fall of the wind pressure for dust absorption can be suppressed more favorably, and dust collection efficiency can be improved.

  Another example of the restraining means is a protective cover provided with a linear fastener that opens and closes following the movement of the cooling medium supply unit 13. As a linear fastener, the linear fastener used for opening and closing clothing etc. is typical. The line fastener is a linear fastener that opens and closes by moving a slider and combining left and right elements (service teeth).

  In particular, if two sliders are provided at a predetermined interval and the line fastener is configured to open between the sliders, the supply unit 13 can be projected from between the sliders, while the other portions can be closed. Further, following the movement of the supply unit 13, the pair of sliders can be moved while maintaining a constant interval.

  Another example of the linear fastener is a slide chuck used for opening and closing a bag mainly made of a resin such as polyethylene. The slide chuck is a fastener that uses a slider piece to open and close a chuck that can be opened and closed by engaging a pair of concave and convex portions linearly provided on a pair of resin materials. Therefore, as in the case of the line fastener, if two slider pieces are provided at an interval that covers the size of the supply unit 13 and the slide chuck is configured to open between the slider pieces, the movement of the supply unit 13 is followed. It can be used as deterring means for opening and closing.

  In this way, at least during dust collection, the drilling is performed by using the closing means that closes the gap 16 provided in the casing 14 so as to project the supply part 13 by opening and closing following the movement of the supply part 13 of the cooling medium. The drive device 1 can be provided. For example, the drill driving device 1 can be provided with a flexible cover or a linear fastener provided with a cut 19 in accordance with the moving range of the cooling medium supply unit 13 as described above as a closing means.

(Second Embodiment)
FIG. 3 is a cross-sectional view showing a configuration of a drill driving device according to the second embodiment of the present invention.

  In the drill driving device 1A shown in FIG. 3, the structure of the suppression means for reducing the fall of the wind pressure for dust collection is different from the drill driving device 1 shown in FIG. Since other configurations and operations are not substantially different from the drill driving device 1 shown in FIG. 1, the same components are denoted by the same reference numerals and description thereof is omitted.

  In the drill driving device 1A, a check valve 20 is provided in the casing 14 as deterring means for suppressing a decrease in wind pressure for dust collection due to movement of the supply unit 13 and the moving mechanism 7.

  FIG. 4 is a left side view of the check valve 20 shown in FIG.

  As shown in FIG. 4, the check valve 20 can be configured by a flexible member having a disk-like structure having a through hole 20 </ b> A at the center or an elastic disk-like member 20 </ b> B. Moreover, the function as the check valve 20 can be obtained by providing an arbitrary number of the plurality of cuts 20C in the diameter direction of the disk-shaped member 20B.

  The check valve 20 configured in this manner is fixed in the casing 14 between the moving mechanism 7 and the dust collecting branch 17 in a state where the tool 2 is passed through the through hole. The diameter of the through hole of the check valve 20 is preferably less than the diameter of the tool 2. In this case, the check valve 20 can be configured to bend toward the moving mechanism 7 side.

  If it does so, when it will inhale from the branching path 17 for dust collection, the inside of the casing 14 in the branching path 17 side rather than the non-return valve 20 will become a pressure smaller than atmospheric pressure. On the other hand, the inside of the casing 14 on the moving mechanism 7 side of the check valve 20 communicates with the outside through a gap 16 for movement of the supply unit 13. Therefore, the inside of the casing 14 on the moving mechanism 7 side of the check valve 20 is approximately atmospheric pressure.

  As a result, the check valve 20 is pressed against the branch path 17 due to a pressure difference between both sides of the check valve 20. For this reason, the tool 2 and the check valve 20 come into contact with each other, and air leakage from the gap between the tool 2 and the check valve 20 can be reduced. In other words, the flow of air passing between the moving mechanism 7 and the casing 14 from the moving gap 16 of the supply unit 13 can be sufficiently reduced.

  As a result, it is possible to prevent a decrease in wind pressure from the through hole 15 of the casing 14 for projecting the tool 2 toward the dust collecting branching path 17. That is, the check valve 20 can suppress a decrease in the wind pressure for dust collection due to the movement of the cooling medium supply unit 13 and the moving mechanism 7. Thereby, even if it is a case where a cooling medium is supplied to a piercing | punching site | part, dust collection of a chip can be performed with favorable dust collection efficiency.

  According to the drill driving device 1A in the second embodiment, it is possible to obtain the same effect as the drill driving device 1 in the first embodiment. Even when the tool 2 having various diameters is attached to the drill driving device 1, the gap generated around the tool 2 can be closed in accordance with the diameter of the tool 2.

(Third embodiment)
FIG. 5 is a cross-sectional view showing a configuration of a drill driving device according to a third embodiment of the present invention.

  In the drill driving device 1A shown in FIG. 5, the structure of the suppression means for reducing the fall of the wind pressure for dust collection differs from the drill driving device 1 shown in FIG. Since other configurations and operations are not substantially different from the drill driving device 1 shown in FIG. 1, the same components are denoted by the same reference numerals and description thereof is omitted.

  The drill driving device 1B is provided with a disk-shaped member 30 in the casing 14 as a restraining means for restraining a decrease in wind pressure for dust collection due to movement of the supply unit 13 and the moving mechanism 7. In the center of the disk-shaped member 30, a through-hole that matches the diameter of the tool 2 is provided. The disk-shaped member 30 is fixed in the casing 14 between the moving mechanism 7 and the dust collecting branch path 17 with the tool 2 passed through the through hole.

  As a result, when the air is sucked in from the dust collecting branch path 17, the flow of air passing between the moving mechanism 7 and the casing 14 from the moving gap 16 of the supply unit 13 can be sufficiently reduced. That is, the disk-shaped member 30 functions as a pressure adjustment plate that adjusts the pressure in the vicinity of the dust collection branch path 17 in the casing 14.

  In particular, when feeding is applied to the tool 2, the side surface of the shank portion of the tool 2 having no groove is in contact with or close to the inner surface of the through hole of the disk-shaped member 30. For this reason, it is possible to satisfactorily suppress air leakage. Therefore, if the disk-shaped member 30 is made of a flexible material such as an elastic body, air leakage can be suppressed more satisfactorily.

  For this reason, according to the drill drive device 1B in 3rd Embodiment, the effect similar to the drill drive device 1 in 1st Embodiment can be acquired. Further, it is possible to keep the wind pressure for dust collection favorable only by providing the disk-shaped member 30 having a very simple structure.

(Other embodiments)
Although specific embodiments have been described above, the described embodiments are merely examples, and do not limit the scope of the invention. The novel methods and apparatus described herein can be implemented in a variety of other ways. Various omissions, substitutions, and changes can be made in the method and apparatus described herein without departing from the spirit of the invention. The appended claims and their equivalents include such various forms and modifications as are encompassed by the scope and spirit of the invention.

  For example, the drill drilling apparatus can be provided with a plurality of deterring means for suppressing a decrease in the wind pressure for dust suction exemplified in each embodiment. That is, in addition to the suppression means for closing the movement gap 16 of the supply unit 13 provided in the casing 14, suppression means such as the check valve 20 and the disk-shaped member 30 can be provided in the casing 14. Thereby, dust collection efficiency can be improved further. Alternatively, a deterring unit having another configuration can be used alone or in combination with the deterring unit exemplified in each embodiment.

  Moreover, in each embodiment mentioned above, although the drill drive device 1, 1A, 1B as a hand-held hand tool was illustrated, even if it is a drill drive device attached to and detached from an automatic drilling device, a tool moving mechanism Is a device that feeds in the tool axis direction together with the coolant supply unit, the casing having the dust collecting branch and the suppression means for suppressing the decrease in the wind pressure for dust collecting can be provided in the drill drilling device. . Thereby, it is possible to perform perforation using both the supply of the cooling medium and the dust absorption.

  Further, in each of the above-described embodiments, the case where the coolant such as the coolant is supplied to the drill driving devices 1, 1 </ b> A, 1 </ b> B has been described. It can also be made to supply.

DESCRIPTION OF SYMBOLS 1, 1A, 1B Drill drive device 2 Tool 3 Work 4 Grip 5 Body 6 Fixing part 7 Movement mechanism 8 Power source 9 Collet 10 Collet holder 11 Bushing 12 Punching tool 13 Supply part 14 Casing 15 Through-hole 16 Gap 17 Branching path 18 Protection Cover 19 Notch 20 Check valve 20A Through hole 20B Disc-like member 20C Notch 30 Disc-like member X Coolant flow path
Y Flow of air flow F Feed direction

Claims (4)

A fixed part;
A moving mechanism for holding a tool and moving the tool in an axial direction with respect to the fixed portion;
A cooling medium or lubricating medium supply section that moves with the moving mechanism;
A casing that is fixed to the fixing portion, covers at least a tip end side of the tool of the moving mechanism, and forms a branch path for collecting dust;
Deterring means for inhibiting a decrease in wind pressure for dust collection due to movement of at least one of the supply unit and the moving mechanism;
With
In the side surface of the casing, a plurality of gaps for projecting the supply unit is provided in the circumferential direction,
A cylindrical flexible cover that closes the plurality of gaps by opening and closing following the movement of the supply unit at least during dust collection, and has one cut on the side surface in accordance with the movement range of the supply unit A drill driving device provided with the flexible cover having a size that fits the outer shape of the casing.   The drill driving device according to claim 1, further comprising a restraining means for restraining a decrease in the wind pressure for dust collection in the casing. The collection branch path for dust, the supply unit drill drive according to claim 1 or 2, wherein provided at the tip end of the tool than. Holding the tool by a moving mechanism, and moving the moving mechanism in the axial direction of the tool with respect to the fixed portion;
Supplying a cooling medium or a lubricating medium via a supply unit that moves together with the moving mechanism;
Collecting dust through a dust collecting branch formed in a casing fixed to the fixed portion;
Suppressing a decrease in wind pressure for dust collection due to movement of at least one of the supply unit and the moving mechanism;
Have
In the side surface of the casing, a plurality of gaps for projecting the supply unit is provided in the circumferential direction,
A cylindrical flexible cover that closes the plurality of gaps by opening and closing following the movement of the supply unit at least during dust collection, and has one cut on the side surface in accordance with the movement range of the supply unit A drill driving method in which a drop in wind pressure for dust collection is suppressed by providing the casing with the flexible cover having a size that fits the outer shape of the casing.

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