JP2011110617A - Deburring tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deburring tool capable of coping with various deburring conditions and restraining running cost. <P>SOLUTION: In this deburring tool 10, a mechanism chamber 15 inside a tip of a rotary shaft 11 is communicated with a cutter receiving hole 14 opened on a side face. Also, an elastic ring 50 housed in the mechanism chamber 15 contacts a base end of a cutter part 30 received by the cutter receiving hole 14. Normally, the cutter part 30 maintains to project from the cutter receiving hole 14. Then, a tip opening 45 of a flow path 40 in the shaft is opened inside the elastic ring 50, and the elastic ring 50 closes the tip opening 45 of the flow path 40 in the shaft. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, the cutter part is received in the cutter part receiving hole provided at the tip part of the rotating shaft and supported so as to be able to reciprocate in and out, and the burr can be removed by pressing the cutter part against the workpiece in the rotating state. It relates to a take tool.

  As a first conventional example of this type of deburring tool, a fluid such as factory air or coolant is supplied to the flow path in the shaft communicating with the cutter receiving hole, and the fluid is discharged from the cutter receiving hole to the outside. A deburring tool that biases the cutter portion outward by the dynamic pressure of the fluid is known (for example, see Patent Document 1). Further, as a second conventional example, a deburring tool that urges the cutter portion to the outside by an elastic member provided in the back portion of the cutter portion receiving hole is also known.

Japanese Patent No. 4113502 (FIGS. 1, 4 and 1)

  However, the deburring tool of the first conventional example described above has a problem in that a large amount of factory air or coolant is used to urge the cutter portion to the outside, which increases the running cost. Moreover, in the deburring tool of the first conventional example, the urging force to the cutter portion can be changed according to the deburring processing conditions such as the material of the workpiece, but in the deburring tool of the second conventional example, Therefore, it is necessary to prepare a plurality of types of deburring tools in order to compensate for this, and there is a problem that the initial cost is high.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a deburring tool that can cope with various deburring conditions and can reduce running costs.

  The deburring tool according to the first aspect of the present invention, which has been made to achieve the above object, is capable of receiving a cutter part in a cutter part receiving hole opened on a side surface of a tip part of a rotary shaft and reciprocating in and out. In a deburring tool that supports and removes burrs by pressing the cutter part against the workpiece while the rotating shaft rotates, a mechanism room formed inside the tip of the rotating shaft and communicating with the cutter part receiving hole; It is housed in the mechanism room and forms an annulus surrounding the central axis of the rotating shaft and abuts against the base end of the cutter part. Usually, the cutter part is maintained in a state of projecting outside the cutter part receiving hole. A rubber or resin elastic ring that elastically deforms due to the force received from the workpiece and allows the inward movement of the cutter part, and extends in the axial direction inside the rotary shaft, A channel in the shaft having a proximal end opening opened on the outer surface of the proximal end of the groove and a distal end opening opened inside the elastic ring and capable of supplying pressurized fluid from the proximal end opening toward the distal end opening; And a tip fluid receiving portion that includes an elastic ring and closes the tip opening of the in-shaft channel.

  According to a second aspect of the present invention, in the deburring tool according to the first aspect, a plurality of cutter part receiving holes are provided to communicate with a common mechanism room, and a plurality of cutter parts are provided corresponding to the plurality of cutter part receiving holes. It has a feature in that it is provided and brought into contact with a common elastic ring.

  According to a third aspect of the present invention, in the deburring tool according to the first or second aspect, the elastic ring has a groove shape in cross section, and the groove opening is directed toward the central axis side. A ring support cylinder having a pair of ring close contact portions penetrating the inside and having a groove opening edge of the elastic ring closely attached is provided, the flow path in the shaft extends to the inside of the ring support cylinder, and the tip opening is a pair of rings. It is characterized in that it opens between the close contact portions toward the space in the groove of the elastic ring.

  According to a fourth aspect of the present invention, in the deburring tool according to the first or second aspect, the first ring end abutting surface and the second ring which are disposed in the mechanism chamber so as to be opposed to and parallel to each other in the axial direction of the rotating shaft An end abutment surface, sandwiching the elastic ring in the axial direction between them, and an annular contact with the elastic ring of the first ring end abutment surface with which the proximal end surface of the elastic ring abuts It is characterized in that the tip opening of the channel in the shaft is opened inside the contact area.

  According to a fifth aspect of the present invention, in the deburring tool according to any one of the first to fourth aspects, a positioning through hole is formed in a contact portion of the elastic ring with the cutter portion, and the positioning through hole is formed. It is characterized in that a part of the cutter part is fitted and closed.

  The invention of claim 6 is the deburring tool according to any one of claims 1 to 5, wherein the rotating shaft is formed by assembling a rotating shaft body and a tip closing disk, A mechanism chamber and a component receiving opening that opens the mechanism chamber to the front surface of the rotary shaft main body are formed, and the component receiving opening is closed by a tip closing plate.

  According to a seventh aspect of the present invention, in the deburring tool according to the sixth aspect, the central axis side of the rotary shaft is provided in the middle of the cutter portion receiving hole in the axial direction or at the boundary portion between the cutter portion receiving hole and the mechanism chamber. A facing standby stopper surface is formed, and the cutter portion is characterized in that a step stopper surface that contacts the standby stopper surface is formed.

  The invention according to claim 8 is the deburring tool according to claim 6 or 7, wherein the elastic ring has a groove shape in cross section, the groove opening is directed to the central axis side, and protrudes from the tip closing disk to the mechanism room side. A ring support tube having a pair of ring contact portions that penetrates the inside of the elastic ring and the groove opening edges of the elastic ring are in close contact with each other, and the tip of the ring support tube is coupled to the rotary shaft body. The flow path in the shaft extends to the inside of the support cylinder, and the tip opening of the flow path in the shaft is characterized in that it opens toward the groove inner space of the elastic ring between a pair of ring contact portions of the ring support cylinder. Have.

  The invention of claim 9 is characterized in that, in the deburring tool according to claim 8, the pair of ring close contact portions are formed with engagement grooves in which the groove opening edges of the elastic ring are engaged with each other. .

  The deburring tool according to the invention of claim 10 is a state in which the cutter shaft is received in the cutter portion receiving hole opened on the outer surface of the tip portion of the rotating shaft and supported so as to be reciprocable inward and outward, and the rotating shaft is rotated. In the deburring tool that can remove the burr by pressing the cutter part against the workpiece, a mechanism chamber formed inside the tip of the rotating shaft and communicating with the cutter part receiving hole, and housed in the mechanism room, Abuts the base end and normally keeps the cutter part protruding outside the cutter part receiving hole, allowing the cutter part to elastically deform due to the force received from the workpiece and allow the cutter part to move inside An elastic member made of rubber or resin, a base end opening extending in the axial direction inside the rotary shaft, and opened to the outer surface of the base end portion of the rotary shaft, and a front end opening opened in the mechanism chamber It has a feature in that it has a flow path in the shaft capable of supplying pressurized fluid from the base end opening toward the front end opening, and a front end fluid pressure receiving portion that includes an elastic member and closes the front end opening of the flow path in the shaft. .

[Invention of Claim 1]
In the deburring tool according to the first aspect, the mechanism chamber inside the tip end portion of the rotary shaft communicates with the cutter portion receiving hole opened to the side surface. The elastic ring made of rubber or resin accommodated in the mechanism room is in contact with the base end portion of the cutter part received in the cutter part receiving hole, and the cutter part normally protrudes from the cutter part receiving hole. Maintained in a state. Here, in the present invention, the tip opening of the channel in the shaft opens to the inside of the elastic ring, and the tip fluid pressure receiving portion including the elastic ring closes the tip opening of the channel in the shaft. Accordingly, the elastic ring can apply a pressing force obtained by adding the fluid pressure in the in-shaft flow path to the elastic force to the cutter portion, and can bias the cutter portion to the outside. Further, the pressing force applied from the elastic ring to the cutter portion can be changed as appropriate by switching whether or not to apply fluid to the flow path in the shaft, or by changing the fluid pressure, corresponding to various deburring conditions. It becomes possible. In addition, the amount of fluid consumption is reduced as compared with the prior art, thereby reducing the running cost.

[Invention of claim 2]
There may be one or more cutter part receiving holes and cutter parts. When a plurality of cutter part receiving holes and a plurality of cutter parts are provided, a plurality of elastic rings may be arranged in the axial direction, and the cutter parts may be brought into contact with each elastic ring. May be brought into contact with a common elastic ring to reduce the number of parts.

[Invention of claim 3]
By supporting the elastic ring with the ring support tube from the inside as in the third aspect of the invention, it is possible to impart a stable elastic force to the cutter portion. Further, as in the configuration of claim 3, the elastic ring is formed into a cross-sectional groove shape, and the groove opening edge is brought into close contact with the ring support tube, and the tip opening of the in-shaft channel is formed between the ring contact portions of the ring support tube. If arranged, the fluid leakage prevention function is enhanced.

[Invention of claim 4]
According to the configuration of claim 4, since the elastic ring is sandwiched between the first and second ring end contact surfaces in the axial direction, compared with the case where the support member is provided inside the elastic ring. Thus, the structure is simplified and it can be manufactured at low cost.

[Invention of claim 5]
According to the structure of Claim 5, the contact position of an elastic ring and a cutter part is stabilized, and the behavior of a cutter part is also stabilized.

[Invention of claim 6]
According to the configuration of the sixth aspect, the maintenance of the deburring tool can be easily performed by detaching the tip closing disk from the rotating shaft body and opening the mechanism chamber.

[Invention of Claim 7]
According to the structure of Claim 7, the level | step difference stopper surface of a cutter part contact | abuts to the standby stopper surface of a rotating shaft, and the protrusion amount of the cutter part to the outer side of a cutter part receiving hole is stabilized.

[Inventions of Claims 8 and 9]
According to the configuration of the eighth aspect, the assembling work can be easily performed by assembling the tip closing disk to the rotary shaft body in a state where the elastic ring is mounted on the ring support cylinder protruding from the tip closing disk. Further, if the engagement groove engaged with the groove opening edge of the elastic ring is formed in the ring support cylinder as in the configuration of claim 9, the displacement of the elastic ring in the axial direction of the ring support cylinder is prevented. In addition to being prevented, the degree of adhesion between the ring support cylinder and the elastic ring is increased.

[Invention of Claim 10]
In the deburring tool according to the tenth aspect, the mechanism chamber inside the tip end portion of the rotary shaft communicates with the cutter portion receiving hole opened to the outer surface. The elastic member made of rubber or resin accommodated in the mechanism room is in contact with the base end portion of the cutter portion received in the cutter portion receiving hole, and normally the cutter portion protrudes from the cutter portion receiving hole. Maintained in a state. Here, in the present invention, the tip opening of the in-shaft channel opens into the mechanism chamber, and the tip fluid pressure receiving portion including the elastic member closes the tip opening of the in-shaft channel. Accordingly, the elastic member can apply a pressing force obtained by adding the fluid pressure in the in-shaft flow path to the elastic force to the cutter portion, and can bias the cutter portion outward. Further, the pressing force applied from the elastic member to the cutter portion can be changed as appropriate by switching whether or not to apply fluid to the flow path in the shaft, or by changing the fluid pressure, which corresponds to various deburring conditions. It becomes possible. In addition, the amount of fluid consumed is reduced compared to the prior art, which can reduce running costs.

  In addition, in the deburring tool according to any one of claims 1 to 10, a small amount of fluid compared to the conventional deburring tool, a gap between the elastic ring or the elastic member and another part, or It may be configured so as to leak to the outside of the cutter portion receiving hole through a minute hole formed in the elastic ring or the elastic member so as to prevent foreign matter from entering the cutter portion receiving hole from the outside.

Side view of the deburring tool according to the first embodiment of the present invention. Side sectional view of the tip head of the deburring tool Cross-sectional view of the tip head of the deburring tool Front view of deburring tool Side view of workpiece and deburring tool Side sectional view of the tip head portion in the deburring tool of the second embodiment Side sectional view of the tip head portion in the deburring tool of the third embodiment Side sectional view of the tip head portion in the deburring tool of the fourth embodiment Cross-sectional view of the tip head of the deburring tool Side view of deburring tool according to fifth embodiment Side sectional view of the tip head of the deburring tool Cross-sectional view of the tip head of the deburring tool Front view of deburring tool

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The deburring tool 10 of this embodiment is configured by assembling a cutter unit 30 and an elastic ring 50 to a rotating shaft 11. Further, the rotary shaft 11 is formed by assembling a tip closing board 20 to the rotary shaft main body 12. The rotating shaft main body 12 is a cylindrical shaft portion 12A having a uniform outer diameter from the base end portion to the tip end position, and a distal end head portion 13 (“the distal end of the rotating shaft of the present invention”) on the distal end side from the cylindrical shaft portion 12A. Part). The tip head portion 13 has a tapered shape in which the diameter of the cylindrical shaft portion 12A is gradually reduced toward the cylindrical shaft portion 12A, and the tip side of the tapered portion is a columnar shape having a substantially uniform outer diameter.

  As shown in FIG. 2, the distal end head portion 13 is formed with a closing disc receiving portion 16 that is open on the distal end surface, and a ring receiving portion 17 is formed on the back side of the closing disc receiving portion 16. The obstruction board receiving portion 16 has a circular cross section (see FIG. 4), and the ring accommodating portion 17 has a substantially square cross section as shown in FIG. Further, the corner portion of the inner side surface of the rectangular tube-shaped portion of the ring accommodating portion 17 extends outward from the inner surface of the closing plate receiving portion 16, and the central portion of each side on the inner surface of the rectangular tube shape of the ring accommodating portion 17 is The inner side of the receiving part 16 is crossed. Further, a centering hole 18 having a circular cross section is opened in the inner surface of the ring housing portion 17, and a female screw hole 19 is formed in the inner portion of the center, and a cylindrical shaft portion 12 </ b> A is formed in the inner portion of the female screw hole 19. The inner space communicates.

  As shown in FIG. 3, the distal end head portion 13 is formed with a plurality of cutter portion receiving holes 14 opened to the side surface. Specifically, the cutter portion receiving hole 14 is arranged at the center of each flat surface of the four sides of the rectangular cylindrical inner surface of the ring housing portion 17, and is arranged in the radial direction of the tip head portion 13 in the ring in the tip head portion 13. The outer wall portion of the accommodating portion 17 is penetrated. That is, in this embodiment, four cutter part receiving holes 14 are provided, and are arranged equally around the central axis of the tip head part 13.

  As shown in FIG. 2, the tip closing disk 20 has a structure in which a ring support cylinder 22 protrudes from the center of a disk-shaped circular main body 21. Further, the circular main body portion 21 has an outer diameter and a thickness that are just fitted to the obstruction board receiving portion 16.

  The ring support tube 22 has a cylindrical shape, and includes a ring mounting portion 23, a centering shaft portion 24, and a male screw portion 25 in order from the base end portion toward the distal end side. Then, the centering shaft portion 24 of the tip closing board 20 is fitted into the centering hole 18 of the tip head section 13, the tip closing board 20 is centered on the tip head section 13, and the male screw portion of the tip closing board 20. When 25 is screwed into the female screw hole 19 of the tip head portion 13, the circular main body portion 21 of the tip closing plate 20 is placed on the step surface between the closing plate receiving portion 16 and the ring receiving portion 17 in the tip head portion 13. Abutting and positioning. In this state, the opening on the side of the closing plate receiving portion 16 in the ring accommodating portion 17 is closed by the circular main body portion 21, and the inside of the ring accommodating portion 17 becomes the mechanism room 15 according to the present invention. A ring mounting portion 23 is disposed at the center of the mechanism room 15. As shown in FIG. 3, side branch holes 43 are formed in the ring mounting portion 23 so as to penetrate the ring mounting portion 23 and communicate with a central cavity portion 42 at the center of the ring support tube 22. The central cavity portion 42 communicates with the central cavity portion 41 of the cylindrical shaft portion 12 </ b> A, and the central cavity portion 41, 42 and the side branch hole 43 constitute the in-shaft channel 40 according to the present invention. . Moreover, the opening of each side branch hole 43 on the side surface of the ring support cylinder 22 is a tip opening 45 of the in-shaft channel 40 according to the present invention. Furthermore, the opening of the end surface of the base end portion of the central cavity portion 41 in the cylindrical shaft portion 12A is a base end opening 46 (see FIG. 1) according to the present invention.

  Note that a plurality of tool locking recesses 20A for screwing the tip closing plate 20 are formed on the outer end surface of the circular main body 21 (see FIG. 4).

  The cutter part 30 is received in each cutter part receiving hole 14 from the ring accommodating part 17 side. The cutter unit 30 has a structure in which a cemented carbide tip 34 is fixed to the tip surface of the tip support member 31. The tip support member 31 includes a columnar portion 32 slidably fitted in the cutter portion receiving hole 14 and a flange portion 33 projecting laterally from the base end portion. Further, the step surface of the flange portion 33 with the cylindrical portion 32 is a step stopper surface 33S in the present invention. Then, the flat surface on the inner surface of the rectangular tube-shaped portion of the ring accommodating portion 17 is used as a standby stopper surface 17S according to the present invention, and the step stopper surface 33S abuts on the standby stopper surface 17S so that the cutter portion receiving hole 14 faces outward. It does not come out (see FIG. 3).

  Moreover, the collar part 33 has a disk shape as a whole, and a rotation-stopping flat surface 33H is formed so as to cut off a part of the peripheral surface. Then, as shown in FIG. 2, the rotation-stopping flat surface 33 </ b> H is addressed to the inner surface of the circular main body portion 21 in the tip closing plate 20 to restrict the rotation of the cutter portion 30 about the axis.

  As shown in FIG. 3, the tip end surface of the cylindrical portion 32 is positioned inside the cutter portion receiving hole 14 in a state where the step stopper surface 33 </ b> S of the cutter portion 30 is in contact with the standby stopper surface 17 </ b> S. Only the cemented carbide tip 34 fixed to the tip surface of the cylindrical portion 32 protrudes outward from the side surface of the tip head portion 13. The cemented carbide tip 34 has a circular dome shape whose bottom surface is the same circle as the tip surface of the cylindrical portion 32. The bottom surface of the cemented carbide chip 34 is fixed to the tip surface of the cylindrical portion 32 with, for example, an industrial adhesive. In addition, the cylindrical part 32 of this embodiment is comprised with high-speed steel.

  As shown in FIG. 2, an elastic ring 50 is fitted on the outer side of the ring mounting portion 23 in the ring support cylinder 22, and the elastic ring 50 is accommodated in the mechanism chamber 15. The elastic ring 50 is made of, for example, industrial rubber, has a cross-sectional groove shape, and the groove opening is directed to the central axis side. That is, the elastic ring 50 has a tire structure. A lip 51 is formed inside the pair of groove opening edges 50M, 50M in the elastic ring 50.

  The elastic ring 50 brings the outer sides of the groove opening edges 50M, 50M into close contact with a pair of opposed surfaces in the axial direction in the mechanism chamber 15, and the inner peripheral surfaces of the groove opening edges 50M, 50M are 2 of the ring mounting portion 23. It is in a state of being in close contact with the location. Further, the tip opening 45 group of the in-shaft channel 40 is disposed between a pair of ring contact portions of the ring mounting portion 23 where the groove opening edges 50M and 50M of the elastic ring 50 are in close contact. Thereby, the tip opening 45 group is opened to the inside of the elastic ring 50, and the tip opening 45 group is closed by the elastic ring 50. In other words, in the present embodiment, the “tip fluid pressure receiving portion” according to the present invention is configured by only the elastic ring 50.

  The base end portion of each cutter portion 30 is in contact with the outer peripheral surface of the elastic ring 50. The elastic ring 50 normally maintains the cutter part 30 protruding outside the cutter part receiving hole 14, and when the cutter part 30 is pressed from the outside, the elastic ring 50 elastically deforms and the cutter is cut. Inward movement of the portion 30 is allowed.

  This completes the description of the configuration of the deburring tool 10 of the present embodiment. Next, the effect of the deburring tool 10 will be described. In the workpiece W shown in FIG. 5, after the first machining hole 91 is machined, the second machining hole 92 is machined so as to obliquely intersect the first machining hole 91. The burr 93 protrudes toward the first processing hole 91 at the intersection with the two processing holes 91 and 92. Such a burr 93 can be excised using the deburring tool 10 of this embodiment.

  For this purpose, the base end portion of the rotary shaft 11 in the deburring tool 10 is attached to a rotation output shaft of a rotation drive source (not shown), and the center of the rotation output shaft is added to the in-shaft channel 40 of the deburring tool 10. A pressure fluid (for example, compressed air) can be supplied. Then, the deburring tool 10 is inserted from the second machining hole 92 toward the first machining hole 91. At this time, for example, when it is not desired to form a scratch groove by the cutter unit 30 in the middle part of the inner surface of the second machining hole 92, supply of the pressurized fluid to the in-shaft channel 40 of the deburring tool 10 is stopped. Keep it. Further, the deburring tool 10 may be inserted with the rotation of the deburring tool 10 stopped.

  When the tip head portion 13 of the deburring tool 10 reaches the vicinity of the intersection between the first and second machining holes 91 and 92, the first and second reciprocating motions in the axial direction while rotating the deburring tool 10. The cutter unit 30 is pressed against the boundary portion between the second machining holes 91 and 92. Here, when the workpiece W is a material having low hardness such as aluminum, for example, the supply of the pressurized fluid to the in-shaft channel 40 is stopped or the fluid pressure is lowered. Thereby, after the burr 93 is removed, even if the cutter part 30 is pressed against the inner surface of the work W, the cutter part 30 is immersed in the cutter part receiving hole 14, and the situation where the inner surface of the work W is excessively cut off is caused. Can be prevented.

  On the other hand, when the workpiece W is a material having high hardness such as steel, for example, the fluid pressure of the pressurized fluid to the in-shaft channel 40 is increased according to the hardness. Thereby, it becomes difficult for the cutter part 30 to immerse in the cutter part receiving hole 14, and the burr | flash 93 which is hard to remove normally can be removed.

  At this time, in the deburring tool 10 of the present embodiment, a large amount of pressurized fluid is not discharged from the deburring tool 10. This is because, in the deburring tool 10 of the present embodiment, the tip opening 45 of the in-shaft channel 40 is closed by the elastic ring 50 inside the deburring tool 10. As a result, the consumption of pressurized fluid is reduced compared to the conventional case, and the running cost can be suppressed. Further, the elastic ring 50 can apply a pressing force obtained by adding the fluid pressure in the in-shaft flow path 40 to the elastic force to the cutter unit 30 to bias the cutter unit 30 outward. Thereby, as described above, it is possible to appropriately change the pressing force applied from the elastic ring 50 to the cutter unit 30 by switching whether or not the fluid is applied to the in-shaft channel 40 or changing the fluid pressure. It becomes possible to cope with various deburring conditions. Further, in the present embodiment, since the elastic ring 50 is supported by the ring support cylinder 22 from the inside, a stable pressing force can be applied to the cutter unit 30. Furthermore, if the tip closing board 20 is detached from the rotary shaft body 12, the inside of the mechanism chamber 15 is opened to the outside, so that maintenance can be easily performed.

[Second Embodiment]
The deburring tool 10A of the present embodiment is shown in FIG. 6, and the elastic ring 50A is attached to a pair of ring contact portions of the ring support cylinder 22 where the groove opening edges 50M and 50M of the elastic ring 50A are in close contact. The difference from the first embodiment is that the groove opening edges 50M, 50M have engaging grooves 26, 26 engaged in concave and convex. Other configurations are the same as those in the first embodiment. According to the deburring tool 10A of the present embodiment, the position shift of the elastic ring 50 in the axial direction of the ring support cylinder 22 is prevented, and the degree of adhesion between the ring support cylinder 22 and the elastic ring 50A increases.

[Third Embodiment]
The deburring tool 10B of the present embodiment is shown in FIG. 7, and the elastic ring 50B has a cylindrical shape, and both ends thereof are the first and second ring ends facing in the axial direction in the mechanism chamber 15. It is clamped between the part contact surfaces 15A and 15B. With this configuration, the structure of the elastic ring 50B is simplified and can be manufactured at low cost.

[Fourth Embodiment]
This embodiment is shown in FIGS. 8 to 10 and is a modification of the third embodiment. Specifically, in the deburring tool 10C of the present embodiment, as shown in FIG. 8, the ring support cylinder 22 is excluded from the tip closing disk 20C, and the tip opening 45C of the in-shaft channel 40 has first and first ends. Of the two ring end contact surfaces 15A and 15B, an opening is formed at the center of the second ring end contact surface 15B on the cylindrical shaft portion 12A side. The one end surface of the elastic ring 50C is in contact with the tip opening 45C of the second ring end contact surface 15B. In addition, as shown in FIG. 9, the point from which the cutter part receiving hole 14 and the cutter part 30 are provided in two places with a space | interval of 180 degree | times differs from 3rd Embodiment. Further, the tip closing board 20C is different from the third embodiment in that a square columnar projection 20K is provided instead of the tool locking recess 20A. Other configurations are the same as those in the first embodiment.

  According to the present embodiment, it is possible to reduce the diameter of the elastic ring 50C without providing a ring support cylinder inside the elastic ring 50C, and to reduce the radial direction at the tip of the deburring tool 10C.

[Fifth Embodiment]
This embodiment is shown in FIGS. As shown in FIG. 10, the tip head portion 13D provided on the rotary shaft body 12 of the deburring tool 10D of the present embodiment is flattened in the axial direction compared to the tip head portion 13 of the rotary shaft body 12 of the first embodiment. It has a simple shape. Further, as shown in FIG. 13, when the tip head portion 13D is viewed from the axial direction, it is a regular hexagon. And the cutter part receiving hole 14 is formed for every center of each side of the regular hexagon, and the cutter part 30D is received there.

  The elastic ring 50D of the present embodiment surrounds the central shaft 22D protruding from the tip closing board 20D at a position away from it. As shown in FIG. 11, both end surfaces of the elastic ring 50D in the axial direction are slidably in close contact with 1 of the mechanism chamber 15D and the second ring end contact surfaces 15A and 15B. Further, a circular positioning through hole 52 is formed at a position where the circumferential direction of the elastic ring 50D is equally divided into six (see FIG. 12). An emboss 35 protruding from the base end surface of the cutter part 30 </ b> D is fitted in the positioning through hole 52. Thereby, the positioning through hole 52 is closed and the cutter portion 30D is positioned with respect to the elastic ring 50D.

  According to the configuration of the present embodiment, the contact position between the elastic ring 50D and the cutter portion 30D is stabilized by the fitting of the positioning through hole 52 and the emboss 35, and the behavior of the cutter portion 30D is also stabilized.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) Although the deburring tools 10 and 10A to 10D of each of the above embodiments include a plurality of cutter units 30 and 30D, a configuration including only one cutter unit may be used.

  (2) In each of the above embodiments, the cutter unit 30 is supported so as to reciprocate by being fitted into the cutter unit receiving hole 14. For example, the cutter unit is fixed to the tip of a rotatable lever. And it is good also as a structure which a cutter part reciprocates in the inside and outside direction of a cutter part receiving hole with rotation of the lever.

  (3) In each of the above embodiments, the cutter unit 30 protrudes from the side surface of the rotating shaft 11, but the cutter unit may be protruded from the end surface of the rotating shaft.

  (4) Instead of the elastic ring 50 of each of the above embodiments, the tip opening 45 may be closed with an elastic member having a sheet structure or a bag structure and the cutter portion may be pressed.

10, 10A to 10D Deburring tool 11 Rotating shaft 12 Rotating shaft main body 12A Cylindrical shaft portion 13, 13D Tip head portion 14 Cutter portion receiving hole 15, 15D Mechanism room 15A First ring end contact surface 15B Second ring End contact surface 20, 20B, 20C, 20D End block 22 Ring support tube 22D Center shaft 23 Ring mounting portion 26, 26 Engagement groove 30, 30D Cutter portion 33S Step stopper surface 40 In-shaft channel 45, 45C End Opening 46 Base end opening 50, 50A to 50D Elastic ring 50M Groove opening edge 52 Positioning through hole 93 Burr W Workpiece

Claims (10)

The cutter part is received in the cutter part receiving hole opened on the side surface of the tip part of the rotating shaft and supported so as to be able to reciprocate in and out, and the cutter part is pressed against the workpiece while the rotating shaft rotates. In deburring tools that can be removed,
A mechanism chamber formed inside the tip of the rotating shaft and communicating with the cutter receiving hole;
Housed in the mechanism room, forming an annular shape surrounding the central axis of the rotating shaft and abutting on the base end portion of the cutter portion, usually the state in which the cutter portion protrudes outside the cutter portion receiving hole An elastic ring made of rubber or resin that is elastically deformed by the force received from the workpiece and allows the cutter part to move inward,
A base end opening extending in an axial direction inside the rotary shaft and opened to an outer surface of a base end portion of the rotary shaft, and a tip end opening opened inside the elastic ring, and extending from the base end opening to the tip end An in-shaft channel capable of supplying pressurized fluid toward the opening;
A deburring tool comprising: a tip fluid pressure receiving portion that includes the elastic ring and closes the tip opening of the channel in the shaft.   A plurality of the cutter part receiving holes are provided so as to communicate with the common mechanism room, and a plurality of the cutter parts are provided corresponding to the plurality of cutter part receiving holes to be in contact with the common elastic ring. The deburring tool according to claim 1. The elastic ring has a groove shape in cross section, and the groove opening is directed to the central axis side,
In the mechanism room, there is provided a ring support cylinder having a pair of ring close contact portions penetrating the inside of the elastic ring and in close contact with the groove opening edge of the elastic ring,
The flow path in the shaft extends to the inside of the ring support cylinder, and the tip opening is opened toward the groove inner space of the elastic ring between the pair of ring contact portions. Or the deburring tool of 2.   The mechanism room is provided with a first ring end contact surface and a second ring end contact surface that are arranged in parallel and opposite to each other in the axial direction of the rotary shaft, and the elastic ring is interposed between them. The front end of the in-shaft channel is disposed inside the annular contact region with the elastic ring of the first ring end contact surface that is sandwiched in the axial direction and is in contact with the proximal end surface of the elastic ring. The deburring tool according to claim 1, wherein the opening is opened.   The positioning ring hole is formed in the contact part with the said cutter part among the said elastic rings, A part of said cutter part is fitted to the said positioning through hole, and it obstruct | occluded. The deburring tool according to any one of claims. The rotating shaft is formed by assembling a rotating shaft main body and a tip closing board,
The rotating shaft main body is formed with the mechanism chamber and a component receiving opening that opens the mechanism chamber to the front surface of the rotating shaft main body, and the component receiving opening is closed by the tip closing plate. The deburring tool according to any one of claims 1 to 5, wherein the deburring tool is provided.   In the middle of the cutter part receiving hole in the axial direction or at the boundary part between the cutter part receiving hole and the mechanism room, a standby stopper surface facing the central axis side of the rotating shaft is formed, and the cutter part The deburring tool according to claim 6, wherein a step stopper surface abutting on the standby stopper surface is formed. The elastic ring has a groove shape in cross section, and the groove opening is directed to the central axis side,
A ring support cylinder having a pair of ring contact portions projecting from the front end closing board to the mechanism room side and penetrating the inside of the elastic ring and in close contact with a groove opening edge of the elastic ring is provided, and the ring support The tip of the tube is coupled to the rotary shaft body, and the flow path in the shaft extends to the inside of the ring support tube,
8. The tip opening of the in-shaft channel is opened toward the groove inner space of the elastic ring between the pair of ring contact portions of the ring support tube. Deburring tool described.   The deburring tool according to claim 8, wherein an engagement groove in which a groove opening edge of the elastic ring is engaged with each other is formed in the pair of ring contact portions. The cutter part is received in a cutter part receiving hole opened on the outer surface of the tip of the rotating shaft and supported so as to be able to reciprocate in and out, and the cutter part is pressed against the workpiece while the rotating shaft rotates. In deburring tools that can be removed,
A mechanism chamber formed inside the tip of the rotating shaft and communicating with the cutter receiving hole;
It is accommodated in the mechanism room and abuts against the base end of the cutter part, and normally the cutter part is maintained in a state of protruding outside the cutter part receiving hole, and the cutter part is received from the workpiece. An elastic member made of rubber or resin that is elastically deformed by force and allows movement to the inside of the cutter part;
A base end opening extending in an axial direction inside the rotary shaft and opened to an outer surface of a base end portion of the rotary shaft, and a front end opening opened in the mechanism chamber, from the base end opening to the front end opening A flow path in the shaft capable of supplying a pressurized fluid toward the
A deburring tool comprising a tip fluid pressure receiving portion that includes the elastic member and closes the tip opening of the channel in the shaft.

Images