JP2018062054A - Tool masking jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool masking jig capable of masking a cutting tool without individually preparing the masking jig according to the total length of the cutting tool.SOLUTION: A tool masking jig is provided, which masks a part not subjected to coating when a cutting tool is subjected to the coating. The tool masking jig is equipped with a fixed portion for supporting the cutting tool from a lower side, and a moving portion having a hollow portion capable of storing the fixed portion in a longitudinal direction. A fitted portion provided on an outer periphery of the fixed portion, and a fitting portion provided on an inner periphery of the moving portion are oppositely united so as to enable the moving portion to move in the longitudinal direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tool masking jig used for masking a cutting tool.

  In order to ensure heat resistance, wear resistance, etc., a cutting tool may coat the surface of a cutting blade to form a hard metal film. At that time, the portions that do not require coating are masked to protect the coating material from adhering. For example, in Patent Document 1, a portion that does not require coating is masked with a stainless steel pipe.

JP 2007-290051 A

  However, since a cutting tool to be coated may be reused after re-grinding, the same type of cutting tool may have a different overall length and a different masking range. Also, different types of cutting tools often have different overall lengths and different masking ranges.

  Therefore, when the stainless steel pipe disclosed in Patent Document 1 is used as a masking jig, there is a problem that the masking jig must be prepared individually in accordance with the entire length of the cutting tool.

  The present invention has been made in view of the above, and provides a masking jig for a tool capable of masking a cutting tool without separately preparing a masking jig in accordance with the entire length of the cutting tool. With the goal.

A masking jig for a tool according to one aspect of the present invention,
When applying a coating to a cutting tool, it is a masking jig for a tool that masks the part that is not coated,
A fixing portion for supporting the cutting tool from below;
A movable part having a hollow part capable of accommodating the fixed part in the longitudinal direction,
A mated portion provided on the outer periphery of the fixed portion and a mating portion provided on the inner periphery of the movable portion are coupled to face each other so that the movable portion can move in the longitudinal direction.

  According to the above-described aspect of the present invention, it is possible to provide a tool masking jig capable of masking a cutting tool without separately preparing a masking jig in accordance with the entire length of the cutting tool. Is obtained.

FIG. 3 is a transparent perspective view illustrating a configuration example of a tool masking jig according to the first embodiment. FIG. 6 is a front sectional view showing a configuration example of a tool masking jig according to a second embodiment. It is a figure which shows the state by which the cutting tool was set to the masking jig | tool for tools shown by FIG. It is a figure which shows the effect | action of the holder base and nut holder which are shown by FIG. It is a figure which shows the effect | action of the cap shown by FIG. It is a figure which shows the effect | action of the spring shown by FIG. It is a figure which shows the effect | action of the cover shown by FIG. It is a figure which shows the specific structure of the component of the masking jig | tool for tools shown by FIG. It is a figure which shows the specific structure of the cutting tool set to the masking jig | tool for tools shown by FIG. It is a figure which shows the positional relationship at the time of assembling each component shown by FIG. 8 as a masking jig for tools. It is a figure which shows the state by which the cutting tool shown by FIG. 9 was set to the nut holder shown by FIG. It is a figure which shows the state which assembled each component shown by FIG. 8 as a masking jig for tools. It is the figure which looked at the masking jig | tool for tools shown by FIG. 12 from upper direction.

Embodiments of the present invention will be described below with reference to the drawings.
<Embodiment 1>
FIG. 1 shows a configuration example of a tool masking jig 10 according to the first embodiment. In addition, in FIG. 1, the expanded sectional view of A part is also shown collectively.

  The tool masking jig 10 is a jig for masking a portion that does not require coating when the cutting tool 20 is coated. Here, it is assumed that a hard metal film is formed by coating the tip portion of the cutting blade of the cutting tool 20 with a coating material made of hard metal.

  The tool masking jig 10 is divided into a fixed portion 11 and a movable portion 12, and the fixed portion 11 is disposed on the lower side and the movable portion 12 is disposed on the upper side. The fixing part 11 is a member that supports the cutting tool 20 from below. In the first embodiment, the fixing portion 11 is a bottomed cylindrical member having a hollow portion that can accommodate the cutting tool 20 in the longitudinal direction, and the bottom portion is the lower surface of the fixing portion 11. The movable portion 12 is a bottomless cylindrical member having a hollow portion that can accommodate the fixed portion 11 in the longitudinal direction. Therefore, the upper surface of the movable part 12 is opened.

  A mated portion 111 having a helical thread groove is provided on the outer periphery in the vicinity of the upper end portion in the longitudinal direction of the fixed portion 11, and the inner periphery near the lower end portion in the longitudinal direction of the movable portion 12. Is provided with a mating portion 121 having a helical thread groove. Here, the mating part 111 and the mating part 121 are arranged to face each other, and the mating part 111 is screwed together and coupled with the mating part 121 as a female screw. Therefore, by rotating the movable part 12 around the axis, the movable part 12 can be moved in the longitudinal direction relative to the fixed part 11.

  A skirt portion 122 extending downward in the longitudinal direction is provided at the tip of the movable portion 12 on the side of the mating portion 121 so as to cover the entire mated portion 111.

Hereinafter, a procedure for coating the cutting tool 20 will be described.
First, the cutting tool 20 is inserted from the upper surface of the movable part 12 and set inside the fixed part 11.
Subsequently, the masking range of the cutting tool 20 is adjusted by rotating the movable part 12 about the axis and moving the movable part 12 in the longitudinal direction relative to the fixed part 11. At this time, only the tip portion of the cutting blade to be coated on the cutting tool 20 is protruded from the upper surface of the movable portion 12. Therefore, the other part in the cutting tool 20 is masked by the fixed part 11 and the movable part 12, and is protected so that the coating material does not adhere.
Thereafter, the cutting tool 20 is coated with a coating material made of hard metal.

  At this time, only the tip portion of the cutting blade of the cutting tool 20 protrudes from the upper surface of the movable portion 12. Therefore, the coating material can be attached only to the tip portion of the cutting blade of the cutting tool 20, and a hard metal film can be formed.

  At this time, if the coating material adheres to the joint portion between the mating portion 111 and the mating portion 121, there is a problem that the movable portion 12 cannot be rotated, and the tool masking jig 10 is used thereafter. Can not do. However, since the skirt portion 122 is provided at the tip of the movable portion 12 on the side of the mating portion 121 and covers the entire mated portion 111, the coating material adheres to the joint portion between the mated portion 111 and the mating portion 121. Can be prevented. Thereby, the masking jig | tool 10 for tools can be reused.

  As described above, according to the tool masking jig 10 according to the first embodiment, the fixed part 11 that supports the cutting tool 20 from below, and the movable part that has a hollow part that can accommodate the fixed part 11 in the longitudinal direction. 12, a mated portion 111 provided on the outer periphery of the fixed portion 11 and a mating portion 121 provided on the inner periphery of the movable portion 12 are connected so that the movable portion 12 is opposed to be movable in the longitudinal direction. Yes. Thereby, since the masking range of the cutting tool 20 can be adjusted by moving the movable part 12 in the longitudinal direction, it is not necessary to prepare a masking jig individually according to the entire length of the cutting tool 20.

  Further, since the skirt portion 122 is provided at the tip of the movable portion 12 on the side of the mating portion 121 so as to cover the entire mated portion 111, the coating material adheres to the joint portion between the mated portion 111 and the mating portion 121. This can be prevented. Thereby, since it is possible to avoid the occurrence of problems due to the adhesion of the coating material to the joint portion, the tool masking jig 10 can be reused.

<Embodiment 2>
FIG. 2 shows a configuration example of the tool masking jig 30 according to the second embodiment. FIG. 3 shows a state in which the cutting tool 40 is set on the tool masking jig 30 according to the second embodiment.

  The tool masking jig 30 is a jig for masking a portion that does not require coating when the cutting tool 40 is coated. Here, in order to coat the cutting tool 40 evenly, the tool masking jig 30 is fixed to a table (not shown), and the cutting tool 40 is coated while rotating the table. In addition, it is assumed that a hard metal film is formed by coating the tip of the cutting tool 40 with a coating material made of hard metal.

  The tool masking jig 30 includes a cap 31, a nut holder 32 serving as a movable part, a cover 33, a spring 34, and a holder base 35 serving as a fixed part.

  The holder base 35 extends downward from the base portion 351 and the base portion 351, and extends upward from the base portion 351 and the table fixing portion 352 that is fixed to the table when the cutting tool 40 is coated. And a projecting bolt 353 that supports the cutting tool 40 from below.

  The nut holder 32 is a member provided on the upper side of the holder base 35 and having a hollow portion that can accommodate the protruding bolt 353 of the holder base 35 in the longitudinal direction. The upper surface of the nut holder 32 is opened, and the cutting tool 40 is inserted from the upper surface of the nut holder 32 and is placed on and supported by the protruding bolt 353. Further, the hollow portion of the nut holder 32 has an upper diameter smaller than that of the lower portion that houses the protruding bolt 353, and the cutting tool 40 is held in the upper hollow portion having a smaller diameter.

  A mated portion 354 having a spiral thread groove is provided on the outer periphery of the protruding bolt 353, and a mating portion 321 having a spiral thread groove is provided on the inner periphery of the nut holder 32. Here, the mated portion 354 and the mating portion 321 are arranged to face each other, and are coupled to each other by being screwed together with one being a male screw and the other being a female screw.

  Therefore, as shown in FIG. 4, the nut holder 32 can be moved in the longitudinal direction relative to the holder base 35 by rotating the holder base 35 about the axis. Therefore, the masking range of the cutting tool 40 can be adjusted by moving the nut holder 32 in the longitudinal direction and projecting only the tip portion of the cutting blade to be coated on the cutting tool 40 from the upper surface.

  In addition, when the coating is applied to the cutting tool 40, the above-described table is rotated, but the mated portion 354 and the mating portion 321 are not rotated even when the table is rotated. Therefore, when the cutting tool 40 is coated, it is possible to suppress the interference between the cutting tool 40 and the nut holder 32.

  The cap 31 is a cap member provided at the upper part of the nut holder 32 and having an opening. The opening of the cap 31 is provided at a position corresponding to the opening on the upper surface of the nut holder 32, and has a smaller diameter than the opening on the upper surface of the nut holder 32. Specifically, the diameter of the opening of the cap 31 is set to such a diameter that the tip portion of the cutting blade of the cutting tool 40 can pass through.

  As shown in FIG. 5, it is considered that when the cutting tool 40 is coated, the coating material is also scattered above the cutting tool 40. However, by providing the cap 31, it is possible to prevent the coating material scattered upward from dropping and adhering to the outer diameter portion a of the cutting tool 40.

  The spring 34 is an elastic member that is fitted on the outer periphery of the protruding bolt 353 of the holder base 35 and is disposed between the base portion 351 of the holder base 35 and the bottom surface of the nut holder 32.

  The mating portion 354 on the holder base 35 side and the mating portion 321 on the nut holder 32 side are screwed together and joined together, but the screw groove has a backlash. Therefore, when the coating is applied to the cutting tool 40, the coupling portion between the mating portion 354 and the mating portion 321 may be displaced due to vibration caused by the rotation of the table, and the masking range may not be stable.

  Therefore, as shown in FIG. 6, by providing a spring 34, a longitudinal tension is applied between the holder base 35 and the nut holder 32, so that the screw groove can be loosened. Further, it is possible to prevent the coupling portion between the mated portion 354 and the mating portion 321 from being displaced. Therefore, the masking range can be stabilized.

  The cover 33 is a bottomless cylindrical member that extends above the base portion 351 of the holder base 35 along the outer periphery of the nut holder 32 and covers the outer peripheral surface of the spring 34. The height of the upper end portion of the cover 33 may be at least higher than the upper end portion of the spring 34 so that the outer peripheral surface of the spring 34 can be covered.

  As shown in FIG. 7, by providing the cover 33, it is possible to prevent the coating material from adhering to the spring 34. Therefore, it can be prevented that the spring 34 is deformed by the adhesion of the coating material and the tension is reduced.

  Next, the procedure for coating the cutting tool 40 will be described. Here, it is assumed that the component parts of the tool masking jig 30 and the cutting tool 40 have the specific structures shown in FIGS. When the component parts shown in FIG. 8 are assembled as the tool masking jig 30, they are assembled in a positional relationship as shown in FIG.

First, the spring 34 is attached to the holder base 35.
Subsequently, the mating portion 354 on the holder base 35 side and the mating portion 321 on the nut holder 32 side are screwed together and assembled.
Subsequently, the cover 33 is attached to the holder base 35.

Subsequently, the cutting tool 40 is inserted from the upper surface of the nut holder 32 and set so as to be supported from below by the holder base 35. This state is shown in FIG.
Subsequently, the cap 31 is attached to the nut holder 32. This state is shown in FIGS.

  Subsequently, the masking range of the cutting tool 40 is adjusted by rotating the holder base 35 about the axis and moving the nut holder 32 in the longitudinal direction relative to the holder base 35. At this time, only the tip portion of the cutting blade to be coated in the cutting tool 40 is protruded from the upper surface of the cap 31. Therefore, the other part in the cutting tool 40 is masked by the cap 31, the nut holder 32, and the cover 33, and is protected so that the coating material does not adhere.

Thereafter, the tool masking jig 30 is fixed to a table (not shown), and the cutting tool 40 is coated with a coating material made of hard metal while rotating the table.
At this time, only the tip portion of the cutting blade of the cutting tool 40 protrudes from the upper surface of the cap 31. Therefore, a coating material can be attached only to the tip part of the cutting blade of the cutting tool 40, and a hard metal film can be formed.

  As described above, according to the tool masking jig 30 according to the second embodiment, the holder base 35 that supports the cutting tool 40 from below, and the nut holder that has the hollow portion that can accommodate the holder base 35 in the longitudinal direction. 32, a mated portion 354 provided on the outer periphery of the holder base 35 and a mating portion 321 provided on the inner periphery of the nut holder 32 are coupled to face each other so that the nut holder 32 is movable in the longitudinal direction. Yes. Thereby, since the masking range of the cutting tool 40 can be adjusted by moving the nut holder 32 in the longitudinal direction, it is not necessary to prepare a masking jig individually according to the entire length of the cutting tool 40.

  In addition, since a spring is disposed between the holder base 35 and the nut holder 32, a tension is applied between the holder base 35 and the nut holder 32. Therefore, the screw groove can be loosened at the joint portion of the mated portion 354 and the mating portion 321 by the thread groove. Thereby, since it can prevent that the coupling | bond part of the to-be-matched part 354 and the matching part 321 shift | deviates, a masking range can be stabilized.

  The tool masking jig 30 is fixed to a table (not shown), and coats the cutting tool 40 while rotating the table. At this time, even if the table rotates, the mating portion 354 on the holder base 35 side and the mating portion 321 on the nut holder 32 side do not rotate. Therefore, it is possible to suppress the interference between the cutting tool 40 and the nut holder 32.

  Further, since the cover 33 that covers the outer peripheral surface of the spring 34 is provided, the coating material can be prevented from adhering to the spring 34. Thereby, it is possible to prevent the tension of the spring 34 from decreasing.

  Moreover, since the joint part by the thread groove of the to-be-matched part 354 and the mating part 321 is covered with the above-mentioned cover 33, it can prevent that a coating material adheres to this joint part. Thereby, since it is possible to avoid the occurrence of problems due to the adhesion of the coating material to the coupling portion, the tool masking jig 30 can be reused.

  In addition, since the cap 31 disposed at the upper portion of the nut holder 32 is provided, when the cutting tool 40 is coated, the coating material scattered upward falls and adheres to the outer diameter portion of the cutting tool 40. This can be prevented.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 10 Tool masking jig 11 Fixed part 111 Matching part 12 Movable part 121 Matching part 122 Skirt part 20 Cutting tool 30 Tool masking jig 31 Cap 32 Nut holder 321 Matching part 33 Cover 34 Spring 35 Holder base 351 Base part 352 Table fixing part 353 Projection bolt 354 Mated part 40 Cutting tool

Claims (2)

When applying a coating to a cutting tool, it is a masking jig for a tool that masks the part that is not coated,
A fixing portion for supporting the cutting tool from below;
A movable part having a hollow part capable of accommodating the fixed part in the longitudinal direction,
A tool masking jig in which a mating portion provided on an outer periphery of the fixed portion and a mating portion provided on an inner periphery of the movable portion are coupled to face each other so that the movable portion can move in the longitudinal direction. The mating part and the mating part are formed with a screw groove, and the movable part is coupled to the screw groove so as to be movable in the longitudinal direction.
The tool masking jig according to claim 1, wherein a spring is disposed between the fixed portion and the movable portion.