JP2021133372A - Tool guide device - Google Patents

Abstract

To provide an effective technique for preventing deterioration of product quality in a tool guide device for guiding an ultrasonic vibration tool for drilling.SOLUTION: A tool guide device 10 is for guiding an ultrasonic vibration tool 1 for drilling and comprises: a base part 20 pressed against a surface Wa to be machined of a workpiece W; a guide holder part 30 which has a guide hole 31 penetrated so that the ultrasonic vibration tool 1 can be inserted and removed in an axial direction X, and faces the surface Wa to be machined without coming into contact therewith in a state where the base part 20 is pressed against the surface Wa to be machined of the workpiece W; and a stopper part 40 which prevents the ultrasonic vibration tool 1 from moving further from a drilling completion position to an insertion direction X1 when the ultrasonic vibration tool 1 penetrates the guide hole 31 of the guide holder part 30 in the insertion direction X1 and reaches the drilling completion position for the workpiece W.SELECTED DRAWING: Figure 3

Description

The present invention relates to a tool guide device.

Patent Document 1 below discloses this type of tool guide device. This tool guide device includes a guide bush for guiding the punch of the ultrasonic vibration tool for drilling. The guide bush is provided with a guide hole into which the punch is slidably inserted in the axial direction. Ultrasonic vibration is applied to the punch by an ultrasonic horn. Further, a processing portion for punching is provided at the tip of the punch.

According to such a tool guide device, the work can be punched out by bringing the vibrating machined portion into contact with the work while the punch is inserted into the guide hole of the guide bush and the machined portion penetrates the guide hole. .. This makes it possible to drill holes in the work.

WO2005 / 039800

When the above-mentioned device is used, when the reaction force received from the work by the punched portion is released with the completion of the drilling process, the processed portion may move to the work side with that force. In this case, after the drilling process is completed, excessive vibration may be transmitted from the processed portion to the product, or the processed portion may come into contact with the product too much, which may cause deterioration of product quality.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an effective technique for preventing deterioration of product quality in a tool guide device for guiding an ultrasonic vibration tool for drilling. be.

One aspect of the present invention is
A tool guide device for guiding ultrasonic vibration tools for drilling.
The base part that is pressed against the work surface of the work,
A guide that has a guide hole that allows the ultrasonic vibration tool to be inserted and removed in the axial direction, and the base portion is pressed against the work surface of the work and faces the work surface without contacting the work surface. Holder part and
When the ultrasonic vibration tool penetrates the guide hole of the guide holder portion in the insertion direction and reaches the drilling completion position for the work, the ultrasonic vibration tool further moves in the insertion direction from the drilling completion position. Stopper part to prevent
Equipped with a tool guide device,
It is in.

In the above tool guide device, when the base portion is pressed against the work surface of the work, the guide holder portion faces the work surface without contacting the work surface. The guide holder portion is provided with a guide hole through which the ultrasonic vibration tool can be inserted and removed in the axial direction. Therefore, the work can be drilled by pressing the ultrasonic vibration tool that penetrates the guide hole of the guide holder portion in the insertion direction against the work surface of the work in a vibrating state.

Here, since the ultrasonic vibration tool is directly inserted and removed into the guide hole of the guide holder portion, the ultrasonic vibration tool is compared with the structure in which another member is interposed between the ultrasonic vibration tool and the guide holder portion. The effect of closing the gap is obtained, and the accuracy of movement when the ultrasonic vibration tool vibrates in the axial direction can be improved. Therefore, it is possible to suppress the ultrasonic vibration tool from coming into contact with the work in a state of being tilted with respect to the axial direction, and it is possible to suppress the burrs of the work generated during drilling. Further, the work can be drilled without bringing the guide holder portion that directly receives the vibration from the ultrasonic vibration tool into contact with the work surface of the work. As a result, it is possible to prevent the product quality from deteriorating during the drilling process.

Further, when the ultrasonic vibration tool penetrates the guide hole of the guide holder portion in the insertion direction and reaches the drilling completion position for the work, the stopper portion causes the ultrasonic vibration tool to move further in the insertion direction from the drilling completion position. Be blocked. For this reason, after the drilling process is completed, the ultrasonic vibration tool will be prevented from moving more than necessary, and excessive vibration will be transmitted from the ultrasonic vibration tool to the product, or the ultrasonic vibration tool will come into excessive contact with the product. You can prevent it from happening. This makes it possible to prevent the product quality from deteriorating after the drilling process.

As described above, according to the above aspect, it is possible to provide an effective technique for preventing deterioration of product quality in a tool guide device for guiding an ultrasonic vibration tool for drilling.

A plan view of the tool guide device of the first embodiment as viewed from above. A plan view of the tool guide device of the first embodiment as viewed from below. FIG. 1 is a cross-sectional view taken along the line III-III of FIG. A partially enlarged view of region A in FIG. FIG. 3 is a cross-sectional view showing a state when the ultrasonic vibration tool is in the drilling completion position in FIG. FIG. 5 is a partially enlarged view of region B in FIG. FIG. 3 is a cross-sectional view of the tool guide device of the second embodiment corresponding to FIG.

A preferred embodiment of the above embodiment will be described.

In the tool guide device, the ultrasonic vibration tool is larger than the machined portion in the radial direction orthogonal to the axial direction on the rear end side of the machined portion provided at the tip of the tool and the axial direction of the machined portion. The main body housing is provided so as to have a diameter, and a stepped surface is formed at the boundary between the processed portion and the main body housing. It has a small-diameter hole portion with a diameter smaller than that of the large-diameter hole portion, and a contact surface as a stopper portion is provided at the boundary between the large-diameter hole portion and the small-diameter hole portion. It is preferable that the contact surface comes into contact with the stepped surface when the tool reaches the drilling completion position.

According to this tool guide device, the contact surface provided at the boundary between the large-diameter hole and the small-diameter hole among the guide holes of the guide holder is used as a stopper, and this contact surface is an ultrasonic vibration tool. By abutting on the stepped surface provided at the boundary between the machined portion and the main body housing, it is possible to prevent the ultrasonic vibration tool from moving further in the insertion direction from the drilling completion position. Thereby, the structure of the stopper portion can be simplified by utilizing the different diameter structure of the guide hole of the guide holder portion.

In the tool guide device, the main body housing of the ultrasonic vibration tool has a low amplitude portion whose axial ultrasonic amplitude during vibration is lower than that of the processed portion, and is inside the guide hole of the guide holder portion. It is preferable that the peripheral surface is configured to slide with the ultrasonic vibration tool only in the low amplitude portion of the main body housing.

According to this tool guide device, the inner peripheral surface of the guide hole of the guide holder portion is slid with the ultrasonic vibration tool only in the low amplitude portion of the main body housing in which the ultrasonic amplitude in the axial direction is smaller than that of the machined portion. Can be moved. As a result, the influence of the vibration of the ultrasonic vibration tool on the inner peripheral surface of the guide hole of the guide holder portion can be suppressed to a small value.

In the tool guide device, the guide holder portion is provided on a surface facing the surface to be machined in order to form a crushing prevention space for preventing burrs formed during drilling of the work from being crushed. It is preferable to have a recessed portion.

According to this tool guide device, by providing a recess in the guide holder portion facing the surface to be machined of the work, burrs formed during drilling of the work can be accumulated in this recess, and the burrs can be collected. It becomes possible to prevent being crushed. Therefore, it is possible to prevent burrs from interfering with the product after drilling.

In the tool guide device, the recess is preferably formed by a tapered surface in which the opening edge of the guide hole opened on the facing surface is inclined.

According to this tool guide device, it is possible to form a crush prevention space by utilizing the tapered surface provided at the opening edge of the guide hole.

The tool guide device includes a bracket portion fixed to the base portion, and the bracket portion supports the guide holder portion and with respect to the base portion in a radial direction orthogonal to the axial direction of the ultrasonic vibration tool. It is preferable that the position of the guide holder portion is adjustable.

According to this tool guide device, with the base portion pressed against the work surface of the work, the bracket portion is used to easily adjust the radial position of the guide holder portion with respect to the base portion, that is, the drilling position with respect to the workpiece. can do.

Hereinafter, embodiments of the tool guide device according to the present invention will be described with reference to the drawings.

In the drawings for explaining the tool guide device, unless otherwise specified, the axial direction which is the longitudinal direction of the ultrasonic vibration tool is indicated by an arrow X, and the radial direction orthogonal to the axial direction X is indicated by an arrow Y and an arrow. It is indicated by Z. Further, one of the axial directions X is defined as the insertion direction X1 of the ultrasonic vibration tool, and the opposite direction of the insertion direction X1 is defined as the insertion direction X2 of the ultrasonic vibration tool.

(Embodiment 1)
The tool guide device 10 of the first embodiment shown in FIGS. 1 to 3 is for guiding the ultrasonic vibration tool 1 for drilling used in the work W. In the following, for convenience, a case where the tool guide device 10 is set on the work W placed so that the surface Wa to be machined faces upward will be described exemplarily. Therefore, the arrangement of the tool guide device 10 is appropriately changed by changing the reference position and orientation of the work W.

The tool guide device 10 includes a base portion 20, a guide holder portion 30, a stopper portion 40, and a bracket portion 50.

The base portion 20 is a portion that is pressed against the work surface Wa of the work W during drilling. Therefore, the base portion 20 has two leg portions 21 arranged apart from each other in the radial direction Y, and is configured so that the two leg portions 21 come into contact with the work surface Wa of the work W. (See FIGS. 2 and 3).

The material of the base portion 20 is not particularly limited, but the base portion 20 is in direct contact with the work W, and the base portion 20 is made of a resin material or a rubber material in consideration of preventing damage to the work W as much as possible. It is preferable that it is made of such a material.

The guide holder portion 30 is configured such that the base portion 20 faces the work surface Wa of the work W without being in contact with the work surface Wa in a state of being pressed against the work surface Wa. That is, the guide holder portion 30 faces the work surface Wa of the work W with a gap.

The material of the guide holder portion 30 is not particularly limited, but considering that the guide holder portion 30 is in direct contact with the ultrasonic vibration tool 1, the guide holder portion 30 is preferably made of a material such as a resin material. ..

The guide holder portion 30 has an upper block 30a having a rectangular outer shape in a plan view, and a lower block 30b having a circular outer shape in a plan view and having dimensions Y and Z in the radial directions smaller than the upper block 30a. The guide holder portion 30 is provided with a guide hole 31 that penetrates the upper block 30a and the lower block 30b so that the ultrasonic vibration tool 1 can be inserted and removed in the axial direction X. Therefore, the ultrasonic vibration tool 1 inserted into the guide hole 31 is guided in both the insertion direction X1 and the insertion direction X2.

As shown in FIG. 3, the ultrasonic vibration tool 1 has a machining portion 2 provided at the tip of the tool and an axis on the rear end side of the machining portion 2 in the axial direction X when the lower part in the drawing is the tip of the tool. It has a main body housing 3 provided so as to have a diameter larger than that of the processed portion 2 in the radial directions Y and Z orthogonal to the direction X. The ultrasonic vibration tool 1 is typically configured as a hand tool that the operator grasps and uses with his / her fingers. It is preferable to use a carbon tool steel material (SK material) as the main material of the ultrasonic vibration tool 1.

The processed portion 2 is configured as a columnar punched counter blade with the axial direction X as the longitudinal direction. The length dimension of the machined portion 2 in the axial direction X is set according to the thickness of the work W, and the outer diameter thereof is set according to the hole diameter of the through hole planned for the work W. The machined portion 2 preferably has a tapered shape whose diameter is reduced toward the rear end of the tool in order to minimize contact with the inner peripheral surface of the through hole formed in the work W by drilling.

The main body housing 3 is a cylindrical member having an axial direction X as a longitudinal direction. The outer diameter of the main body housing 3 exceeds the outer diameter of the processed portion 2. Therefore, a stepped surface 4 is formed at the boundary between the main body housing 3 having a relatively large diameter portion and the processed portion 2 having a relatively small diameter portion.

The vibrator 5 which is a vibration source is housed in the cylinder of the main body housing 3. The vibrator 5 is electrically connected to a separate transmitter (not shown). The ultrasonic vibration generated in the vibrator 5 due to the operation of the transmitter is transmitted to the processed portion 2 at the tip of the tool. At this time, the main body housing 3 of the ultrasonic vibration tool 1 has a low amplitude portion 3a in which the ultrasonic amplitude in the axial direction X at the time of vibration is smaller than the ultrasonic amplitude in the axial direction X of the processing portion 2. That is, the low-amplitude portion 3a has a smaller ultrasonic amplitude in the axial direction X than the machining portion 2 in which the drilling process is substantially performed, and the vibration work amount is significantly reduced by moving away from the machining section 2. There is. In general, the ultrasonic amplitude in the axial direction X at the center of the vibrator 5 and the processed portion 2 of the main body housing 3 becomes almost zero, and the ultrasonic amplitude in the axial direction X becomes maximum in the processed portion 2. It is known. In the present embodiment, the inner peripheral surface of the guide hole 31 of the guide holder portion 30 is configured to slide with the ultrasonic vibration tool 1 only in the low amplitude portion 3a of the main body housing 3.

As shown in FIG. 4, when the region A of FIG. 3 is enlarged and described, the guide holes 31 of the guide holder portion 30 are provided with the large-diameter hole portion 31a and the small-diameter hole portion connected to each other in the axial direction X. It has 31b. Here, the large-diameter hole portion 31a is a portion having a circular cross section that opens in the upper region of the guide holder portion 30. The large-diameter hole portion 31a is sized so as to form a minute gap between the large-diameter hole portion 31a and the main body housing 3 of the ultrasonic vibration tool 1. On the other hand, the small-diameter hole portion 31b is a portion having a circular cross section that opens in the lower region of the guide holder portion 30 and having a smaller diameter than the large-diameter hole portion 31a. The small-diameter hole portion 31b is sized so as to form a gap between the processed portion 2 of the ultrasonic vibration tool 1 and the large-diameter hole portion 31a and the main body housing 3 so as to exceed a minute gap.

As a result, the ultrasonic vibration tool 1 slides on the inner peripheral surface of the large-diameter hole 31a of the guide hole 31 of the guide holder portion 30 only in the main body housing 3, whereas the machined portion 2 slides on the inner peripheral surface of the guide hole 31. It is configured so that it does not slide with the inner peripheral surface, or the degree of sliding of the guide hole 31 with the inner peripheral surface is less than that of the main body housing 3.

Further, a contact surface 32 as a stopper portion 40 is provided at the boundary between the large diameter hole portion 31a and the small diameter hole portion 31b in the guide hole 31 of the guide holder portion 30. The contact surface 32 has a function of contacting the stepped surface 4 of the ultrasonic vibration tool 1 when the ultrasonic vibration tool 1 reaches the drilling completion position P2 described later. Therefore, when the ultrasonic vibration tool 1 penetrates the guide hole 31 of the guide holder portion 30 in the insertion direction X1 and reaches the drilling completion position P2 with respect to the work W, the ultrasonic vibration tool 1 starts from the drilling completion position P2. Further, the movement in the insertion direction X1 can be prevented by using the contact surface 32. Such a configuration guarantees the position of the punched end or the pushed end of the ultrasonic vibration tool 1 so that the main body housing 3 of the ultrasonic vibration tool 1 does not come into contact with the work surface Wa of the work W.

As shown in FIGS. 1 and 3, the large-diameter hole portion 31a of the guide hole 31 has a tapered surface whose opening edge is inclined in order to enable smooth insertion operation of the ultrasonic vibration tool 1. It has 33. The tapered surface 33 is formed continuously in the circumferential direction. Further, as shown in FIGS. 2 to 4, the small diameter hole portion 31b of the guide hole 31 is opened by the facing surface 34 facing the work surface Wa of the work W, and the opening edge portion thereof is inclined. It has a tapered surface 36. The tapered surface 36 is formed continuously in the circumferential direction. The facing surface 34 is composed of a circular lower surface of the lower block 30b.

In FIG. 2, in order to clearly show the tapered surface 36, the region of the tapered surface 36 is hatched. The tapered surface 36 forms a mortar-shaped recess 35 on the facing surface 34. The recess 35 forms a crushing prevention space S that prevents burrs formed during the drilling of the work W from being crushed.

As shown in FIGS. 1 and 3, the bracket portion 50 is interposed between the base portion 20 and the guide holder portion 30, and is fixed to the base portion 20 by a plurality of fixing bolts 51. The bracket portion 50 is configured to support the upper block 30a of the guide holder portion 30 from below.

Further, as particularly shown in FIG. 1, the bracket portion 50 includes a facing wall portion 52 facing one side surface of the guide holder portion 30, and a facing wall portion 53 facing another side surface of the guide holder portion 30. Have. Further, in the bracket portion 50, the adjusting bolt 54 is screwed into the screw hole penetrating the facing wall portion 52 in the radial direction Y, and the adjusting bolt 54 is screwed into the screw hole penetrating the facing wall portion 53 in the radial direction Z. 55 is screwed. The tip of the bolt shaft of the adjusting bolt 54 is in contact with one side surface of the guide holder portion 30, and the tip of the bolt shaft of the adjusting bolt 55 is in contact with the other side surface of the guide holder portion 30. ..

Therefore, the protrusion length of the bolt shaft from the facing wall portion 52 changes by operating the adjusting bolt 54, and the position of the guide holder portion 30 with respect to the base portion 20 in the radial direction Y orthogonal to the axial direction X. Can be adjusted. For example, in FIG. 1, the guide holder portion 30 slides to the left in the drawing with respect to the base portion 20 by increasing the protruding length of the bolt shaft of the adjusting bolt 54.

Similarly, the operation of the adjusting bolt 55 changes the protruding length of the bolt shaft from the facing wall portion 53, and the position of the guide holder portion 30 with respect to the base portion 20 in the radial direction Z orthogonal to the axial direction X. Can be adjusted. For example, in FIG. 1, the guide holder portion 30 slides downward in the drawing with respect to the base portion 20 by increasing the protruding length of the bolt shaft of the adjusting bolt 55.

As described above, the bracket portion 50 is configured so that the positions of the guide holder portions 30 in the radial directions Y and Z with respect to the base portion 20 can be adjusted.

Next, with reference to FIGS. 3 to 6, a state when the work W is drilled using the ultrasonic vibration tool 1 will be described.

As shown in FIG. 3, the tool guide device 10 is preliminarily fixed to the work W by using a positioning pin or fixing means having a known structure. As a result, the leg portion 21 of the base portion 20 is pressed against the work surface Wa of the work W. After that, the bracket portion 50 adjusting bolts 54 and 55 are used to adjust the position of the guide holder portion 30 in the radial direction with respect to the base portion 20. As a result, the guide hole 31 of the guide holder portion 30 can be aligned with the predetermined position of the work surface Wa of the work W.

As shown in FIGS. 3 and 4, the ultrasonic vibration tool 1 is inserted into the guide hole 31 of the guide holder portion 30 from the large-diameter hole portion 31a side. After that, the ultrasonic vibration tool 1 is lowered from the pre-processing position P1 in the insertion direction X1 to generate ultrasonic vibration by the vibrator 5. When the machined portion 2 of the ultrasonic vibration tool 1 comes into contact with the work surface Wa of the work W, the machined portion 2 intermittently repeats contact and non-contact with the work W. The region of the work W corresponding to the outer diameter of the machined portion 2 is cut by the impact energy generated at the time of contact and the heat energy generated by the impact. The ultrasonic vibration tool 1 is gradually lowered in the insertion direction X1 toward the machining completion position P2 against the reaction force received from the work W.

As shown in FIGS. 5 and 6, when the ultrasonic vibration tool 1 reaches the drilling completion position P2, the drilling process in the work W is completed. As shown in an enlarged view of the B region of FIG. 5 in FIG. 6, a through hole Wb having an inner diameter corresponding to the outer diameter of the machined portion 2 is formed in the work W.

As the "drilling completion position P2" referred to here, typically, the tip of the processed portion 2 of the ultrasonic vibration tool 1 is from the back surface of the work W (the surface opposite to the surface to be processed Wa). A position that slightly protrudes below the outer diameter of the processed portion 2. The drilling completion position P2 is preferably set in advance according to the thickness of the work W to be used.

When the ultrasonic vibration tool 1 reaches the drilling completion position P2, the stepped surface 4 of the ultrasonic vibration tool 1 comes into contact with the contact surface 32 of the guide holder portion 30. As a result, the ultrasonic vibration tool 1 that has reached the drilling completion position P2 is prevented from moving further from the drilling completion position P2 in the insertion direction X1. Further, the burrs formed during the drilling of the work W are accumulated in the crush prevention space S.

The "burr" referred to here is typically composed of protrusions or protrusions protruding from the opening edge of the through hole Wb formed by drilling the work W toward the surface to be machined Wa.

According to the above-described first embodiment, the following effects can be obtained.

In the tool guide device 10 described above, when the base portion 20 is pressed against the workpiece surface Wa of the work W, the guide holder portion 30 faces the workpiece W without being in contact with the workpiece surface Wa. The guide holder portion 30 is provided with a guide hole 31 through which the ultrasonic vibration tool 1 can be inserted and removed in the axial direction X. Therefore, the ultrasonic vibration tool 1 penetrating the guide hole 31 of the guide holder portion 30 in the insertion direction X1 is pressed against the work surface Wa of the work W in a vibrating state to drill a hole in the work W in the axial direction X. Can be applied.

Here, since the ultrasonic vibration tool 1 is directly inserted and removed into the guide hole 31 of the guide holder portion 30, compared with the structure in which another member is interposed between the ultrasonic vibration tool 1 and the guide holder portion 30. , The gap closing effect on the ultrasonic vibration tool 1 can be obtained, and the accuracy of movement when the ultrasonic vibration tool 1 vibrates in the axial direction X can be improved. Therefore, it is possible to suppress the ultrasonic vibration tool 1 from coming into contact with the work W in a state of being tilted with respect to the axial direction X, and it is possible to suppress the burrs of the work generated during drilling. Further, the work W can be drilled without bringing the guide holder portion 30 that directly receives the vibration from the ultrasonic vibration tool 1 into contact with the work surface Wa of the work W. As a result, it is possible to prevent the product quality from deteriorating during the drilling process.

Further, when the ultrasonic vibration tool 1 penetrates the guide hole 31 of the guide holder portion 30 in the insertion direction X1 and reaches the drilling completion position P2 with respect to the work W, the ultrasonic vibration tool 1 is further inserted from the drilling completion position P2. The movement in the direction X1 is blocked by the stopper portion 40. Therefore, after the drilling process is completed, the ultrasonic vibration tool 1 is prevented from moving more than necessary, and excessive vibration is transmitted from the ultrasonic vibration tool 1 to the product, or the ultrasonic vibration tool 1 is transferred to the product. It is possible to prevent excessive contact. This makes it possible to prevent the product quality from deteriorating after the drilling process.

Therefore, according to the above-described first embodiment, it is possible to provide an effective technique for preventing deterioration of product quality in the tool guide device 10 for guiding the ultrasonic vibration tool 1 for drilling.

According to the tool guide device 10, the contact surface 32 provided at the boundary between the large-diameter hole portion 31a and the small-diameter hole portion 31b of the guide hole 31 of the guide holder portion 30 is used as the stopper portion 40. When the contact surface 32 comes into contact with the stepped surface 4 provided at the boundary between the processed portion 2 of the ultrasonic vibration tool 1 and the main body housing 3, the ultrasonic vibration tool 1 is further inserted in the insertion direction X1 from the drilling completion position P2. Can be prevented from moving to. Thereby, the structure of the stopper portion 40 can be simplified by utilizing the different diameter structure of the guide hole 31 of the guide holder portion 30.

According to the above-mentioned tool guide device 10, the inner peripheral surface of the large-diameter hole portion 31a of the guide hole 31 of the guide holder portion 30 has a smaller ultrasonic amplitude in the axial direction X than the machined portion 2, of the main body housing 3. Only in the low amplitude portion 3a, the ultrasonic vibration tool 1 can be slid. As a result, the influence of the vibration of the ultrasonic vibration tool 1 on the inner peripheral surface of the guide hole 31 of the guide holder portion 30 can be suppressed to a small value. Further, since the guide holder portion 30 has a structure in which the guide holder portion 30 slides only in the low amplitude portion 3a of the main body housing 3 in which the ultrasonic amplitude in the axial direction X is small, the sliding length in the axial direction X should be increased within an allowable range. Can be done. In this case, by increasing the sliding length in the axial direction X, the accuracy of the movement when the ultrasonic vibration tool 1 vibrates in the axial direction X can be further improved.

According to the tool guide device 10 described above, by providing a recess 35 in the guide holder portion 30 facing the surface Wa of the work W to be machined, a burr formed in the recess 35 when the work W is drilled. Can be stored, and it becomes possible to prevent this burr from being crushed. Therefore, it is possible to prevent burrs from interfering with the product after drilling. In particular, the crush prevention space S can be formed by using the tapered surface 36 provided at the opening edge of the small diameter hole portion 31b of the guide hole 31.

According to the tool guide device 10 described above, in a state where the base portion 20 is pressed against the work surface Wa of the work W, the bracket portion 50 is used to determine the radial directions Y and Z of the guide holder portion 30 with respect to the base portion 20. The position, that is, the drilling position with respect to the work W can be easily adjusted.

In the above-described first embodiment, the ultrasonic vibration tool 1 preferably includes a mechanism that detects that the stepped surface 4 has come into contact with the contact surface 32 of the guide holder portion 30 and moves in the insertion direction X2. As a result, the time during which the stepped surface 4 of the ultrasonic vibration tool 1 and the contact surface 32 of the guide holder portion 30 come into contact with each other can be shortened as much as possible.

Hereinafter, other embodiments related to the above-described first embodiment will be described with reference to the drawings. In other embodiments, the same elements as those in the first embodiment are designated by the same reference numerals, and the description of the same elements will be omitted.

(Embodiment 2)
As shown in FIG. 7, the tool guide device 110 of the second embodiment is different from the tool guide device 10 of the first embodiment in that the bracket portion 150 does not have the position adjusting function of the guide holder portion 30 with respect to the base portion 20. It is different. That is, the bracket portion 150 of the tool guide device 110 does not include elements corresponding to the facing wall portions 52 and 53 and the adjusting bolts 54 and 55 provided in the bracket portion 50 of the first embodiment.

Other configurations are the same as those in the first embodiment.

According to the tool guide device 110 of the second embodiment, the device cost can be reduced by simplifying the configuration of the bracket portion 150.

Other than that, it has the same effect as that of the first embodiment.

As a modification particularly related to the tool guide device 110 of the second embodiment described above, it is possible to adopt a structure in which at least two of the base portion 20, the guide holder portion 30, and the bracket portion 150 are integrated parts made of the same material. can.

The present invention is not limited to the above-described embodiment, and various applications and modifications can be considered as long as the object of the present invention is not deviated. For example, the following embodiments to which the present embodiment is applied can also be implemented.

In the above-described embodiment, the case where the number of guide holder portions 30 provided to the base portion 20 is one has been illustrated, but the number of guide holder portions 30 is not limited to this, and if necessary, the number of guide holder portions 30 is not limited to this. A plurality of guide holder portions 30 may be provided. As a result, it can be used for drilling holes at a plurality of locations on the work W. In this case, the plurality of guide holes 31 of the plurality of guide holder portions 30 may all have the same diameter, or the plurality of guide holes 31 of the plurality of guide holder portions 30 include guide holes 31 having different diameters. May be.

In the above-described embodiment, the case where the recess 35 for forming the crush prevention space S is provided on the facing surface 34 of the guide holder portion 30 has been illustrated, but instead of or in addition to the recess 35, the guide holder portion 30 It is also possible to provide another recess for forming the crush prevention space S on the facing surface 34 of the above.

In the above-described embodiment, the case where the contact surface 32 constituting the stopper portion 40 is provided inside the guide holder portion 30 has been illustrated, but instead of this, an element corresponding to the stopper portion 40 is provided outside the guide holder portion 30. This element may prevent the movement of the insertion direction X1 at the drilling completion position P1 of the ultrasonic vibration tool 1.

1 Ultrasonic vibration tool 2 Machining part 3 Main body housing 3a Low amplitude part 4 Step surface 10,110 Tool guide device 20 Base part 30 Guide holder part 31 Guide hole 31a Large diameter hole part 31b Small diameter hole part 32 Contact surface (stopper part) )
34 Facing surface 35 Recessed surface 36 Tapered surface 40 Stopper part 50, 150 Bracket part P2 Drilling completion position S Crushing prevention space W Work Wa Work surface X Axial direction X1 Insertion direction Y, Z radial direction

Claims (6)

A tool guide device for guiding ultrasonic vibration tools for drilling.
The base part that is pressed against the work surface of the work,
A guide that has a guide hole that allows the ultrasonic vibration tool to be inserted and removed in the axial direction, and the base portion is pressed against the work surface of the work and faces the work surface without contacting the work surface. Holder part and
When the ultrasonic vibration tool penetrates the guide hole of the guide holder portion in the insertion direction and reaches the drilling completion position for the work, the ultrasonic vibration tool further moves in the insertion direction from the drilling completion position. Stopper part to prevent
A tool guide device equipped with. The ultrasonic vibration tool is provided on a machined portion provided at the tip of the tool and on the rear end side in the axial direction of the machined portion so as to have a larger diameter than the machined portion in a radial direction orthogonal to the axial direction. A stepped surface is formed at the boundary between the processed portion and the main body housing.
The guide hole of the guide holder portion has a large-diameter hole portion and a small-diameter hole portion having a diameter smaller than that of the large-diameter hole portion, and the stopper is provided at the boundary between the large-diameter hole portion and the small-diameter hole portion. The first aspect of the present invention, wherein a contact surface is provided as a portion, and the contact surface is configured to contact the stepped surface when the ultrasonic vibration tool reaches the drilling completion position. Tool guide device. The main body housing of the ultrasonic vibration tool has a low amplitude portion in which the ultrasonic amplitude in the axial direction during vibration is lower than that of the processed portion.
The tool guide device according to claim 2, wherein the inner peripheral surface of the guide hole of the guide holder portion is configured to slide with the ultrasonic vibration tool only in the low amplitude portion of the main body housing. The guide holder portion has a recess provided on a surface facing the surface to be machined in order to form a crushing prevention space for preventing burrs formed during drilling of the work from being crushed. The tool guide device according to any one of items 1 to 3. The tool guide device according to claim 4, wherein the recess is formed by a tapered surface in which the opening edge of the guide hole that opens on the facing surface is inclined. A bracket portion fixed to the base portion is provided, and the bracket portion supports the guide holder portion and positions the guide holder portion with respect to the base portion in a radial direction orthogonal to the axial direction of the ultrasonic vibration tool. The tool guide device according to any one of claims 1 to 5, which is configured to be adjustable.

Images