CN113905848B

CN113905848B - Machining cooling device

Info

Publication number: CN113905848B
Application number: CN202080038419.XA
Authority: CN
Inventors: 堀内幸之助; 高桥三男; 荒川力; 和野辽平
Original assignee: Nishang Earth Co ltd
Current assignee: Nishang Earth Co ltd
Priority date: 2019-07-04
Filing date: 2020-07-03
Publication date: 2023-09-19
Anticipated expiration: 2040-07-03
Also published as: CN113905848A; TW202110568A; JPWO2021002451A1; WO2021002451A1

Abstract

The invention provides a machining cooling device capable of cooling well even if machining of a tool is performed deep in a workpiece. Since the outlet (13) of the direction conversion portion (11) is provided at the front surface of the protrusion portion (8), the outlet (13) can be arranged in the vicinity of the tool (6) supported by the tool holder (5), and since the outlet (13) is arranged so as to be adjacent to the tool (6) supported by the tool holder (5), the cooling oil (7) is ejected in parallel from the outlet (13) so as to be adjacent to and in contact with the outer surface of the tool (6). Therefore, even if the processing of the workpiece (2) by the tool (6) proceeds to the depth of the workpiece (2), most of the cooling oil (7) ejected from the outlet (13) does not bounce at the front surface of the workpiece (2) facing the ejection port (10), but reaches the processing portion formed by the tips of the blade portions (18) of the workpiece (2) and the tool (6) located in the depth of the workpiece (2) via the gap between the inner hole (23) of the workpiece (2) and the tool (6), and the processing portion formed by the workpiece (2) and the tool (6) is well cooled by the cooling oil (7).

Description

Machining cooling device

Technical Field

The present invention relates to a machining cooling device and a cooling method.

Background

As shown in fig. 18, the machining cooling device disclosed in patent document 1 is configured such that an injection nozzle 73 is provided at the front surface of a tool holder 72 provided at a tool post 71, the injection nozzle 73 cannot be disposed in the vicinity of a tool 74 supported by the tool holder 72, the injection nozzle 73 is disposed away from the tool 74 to the outside, and the injection nozzle 73 injects cooling oil 74 obliquely toward the tip of the tool 74 from a position away from the tool 74 to the outside. Therefore, as shown in fig. 19, when the processing of the workpiece 76 by the tool 74 is performed to the depth of the workpiece 76, most of the cooling oil 75 injected from the injection nozzle 73 bounces off at the front surface of the workpiece 76 facing the injection nozzle 73, and the amount of cooling oil reaching the processing portion formed by the workpiece 76 and the edge of the tool 74 located in the depth of the workpiece 76 decreases, which has the disadvantage that the cooling of the edges of the workpiece 76 and the tool 74 becomes worse.

Prior art literature

Patent literature

Patent document 1: japanese registered patent No. 3143544

Disclosure of Invention

Problems to be solved by the utility model

The present utility model has been made in view of the above-described background art, and an object of the present utility model is to provide a work cooling apparatus capable of cooling well even when the work by a tool is performed deep in a work.

Means for solving the problems

The present invention is a machining cooling device for cooling a portion of a workpiece disposed at a workpiece disposition portion by a tool supported by a tool rest in the tool disposition portion with cooling oil, characterized in that the machining cooling device has a protrusion portion at which a direction conversion portion is provided such that cooling oil ejected from an ejection port portion into a space is introduced from an outer peripheral surface of the protrusion portion and is led out from a front surface of the protrusion portion toward the machining portion, both of an introduction portion and a discharge portion of the cooling oil in the direction conversion portion being configured to be open. In other words, the present invention is characterized in that the cooling oil is injected into the space from the injection port portion provided at the front surface of the tool holder, the flow direction of the cooling oil injected into the space is switched by the direction switching portion provided at the protrusion portion protruding from the tool holder to the workpiece side, and the cooling oil whose flow direction is switched is led out to the processing portion formed by the workpiece and the tool from the opening provided at the protrusion portion of the tool holder as the lead-out portion of the direction switching portion.

ADVANTAGEOUS EFFECTS OF INVENTION

In the present invention, since the outlet as the lead-out portion of the direction conversion portion is provided at the front surface of the protruding portion protruding from the tool holder to the workpiece side, the outlet can be disposed in the vicinity of the tool, and since the outlet is disposed so as to be adjacent to the tool, the cooling oil can be ejected in parallel from the outlet so as to be adjacent to and in contact with the outer surface of the tool. Therefore, even if the processing of the workpiece by the tool is performed deep in the workpiece, most of the cooling oil ejected from the outlet does not bounce at the front surface of the workpiece facing the ejection port portion, but reaches the processing portion formed by the tips of the tool portions of the workpiece and the tool located deep in the workpiece via the gap between the inner hole processed at the workpiece and the tool, with the effect that the processing portion formed by the workpiece and the tool is well cooled by the cooling oil. Further, in the present invention, since the injection port portion injects the cooling oil into the space at the front surface of the side of the tool holder facing the workpiece, it is unnecessary to connect the injection port portion and the direction changing portion of the protruding portion with piping, and in the case of replacing the tool holder, only the tool holder needs to be detached from the tool holder, and the tool holder can be easily replaced. In the present invention, the direction conversion portion is provided in an upper portion between a center line extending in an up-down direction through a center of the protrusion portion and a center line extending in a left-right direction through the center, an angle θ1 from the center line extending in the up-down direction toward the center line extending in the left-right direction through the center has a portion where a straight line of 30 degrees to 45 degrees intersects one circumference centered on the center, and is provided at a portion where the center line extending in the up-down direction intersects the circumference, so that the tool holder can correspond to a tool rest of a processing machine manufactured by various manufacturing companies. In the present invention, the angle formed by the center line of the hole on the side of the introduction portion and the center line of the tool receiving hole is set to 45 degrees to 55 degrees, so that the cooling oil 7 is ejected in a bundle without being scattered from the outlet 13. In the present invention, the angle formed by the center line of the hole on the lead-out portion side and the center line of the tool receiving hole is set to 0 to 15 degrees, so that the cooling oil 7 is ejected in a bundle without being scattered from the outlet 13. In the present invention, the direction changing portion is formed as a flat slope gradually changing to a downward gradient as going from the inlet portion side to the outlet portion side of the cooling oil, so that the structure is simple. In the present invention, the angle formed by the flat inclined surface and the center line of the tool receiving hole is 0 to 15 degrees, so that the cooling oil can be further ejected in parallel from the outlet in a manner along the outer surface of the tool and in contact.

Drawings

Fig. 1 is a cross-sectional view of a working cooling device according to embodiment 1 of the present invention.

Fig. 2 is a cross-sectional view of a working cooling device according to embodiment 2 of the present invention.

Fig. 3 is a cross-sectional view of a working cooling device according to embodiment 3 of the present invention.

Fig. 4 is a cross-sectional view of a working cooling device according to embodiment 4 of the present invention.

Fig. 5 is a cross-sectional view of a working cooling device according to embodiment 5 of the present invention.

Fig. 6 is a cross-sectional view of a working cooling device according to embodiment 6 of the present invention.

Fig. 7 is a cross-sectional view of a working cooling device according to embodiment 7 of the present invention.

Fig. 8 is a perspective view of a tool holder according to embodiment 8 of the present invention.

Fig. 9 is a front view of a tool holder of embodiment 8 of the present invention.

Fig. 10 is a cross-sectional view taken along line 101-101 of fig. 9.

Fig. 11 is a rear view of the tool holder of embodiment 8 of the present invention.

Fig. 12 is a perspective view of a combination of a tool holder and a tool holder according to embodiment 9 of the present invention.

Fig. 13 is a schematic diagram showing the results of investigation of the position of the ejection port portion provided for the tool post when developing the tool holder according to embodiment 10 of the present invention.

Fig. 14 is a schematic diagram showing the results of verification of the angles of the vertical hole on the inlet side and the horizontal hole on the outlet side of the direction conversion section when developing the tool holder according to embodiment 11 of the present invention.

Fig. 15 is a schematic diagram showing the verification result of the relationship among three direction changing portions, tool receiving holes, and fastening screws in the tool holder according to embodiment 12 of the present invention.

Fig. 16 shows a tool holder according to embodiment 13 of the present invention, in which (a) in fig. 16 is a front view, (B) in fig. 16 is a side view, (C) in fig. 16 is a top view, (D) in fig. 16 is a front view, (E) in fig. 16 is a side view, and (F) in fig. 16 is a top view.

Fig. 17 shows a tool holder according to embodiment 14 of the present invention, in which fig. 17 (a) is a front view, fig. 17 (B) is a side view, and fig. 17 (C) is a top view.

Fig. 18 is a side view of a conventional process cooling device.

Fig. 19 is a side view showing a case where a tool of a conventional working cooling apparatus performs working on a workpiece deep into the workpiece.

Fig. 20 is a front view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention.

Fig. 21 is a rear view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention.

Fig. 22 is a left side view of the tool holder of fig. 15 (C) of embodiment 12 of the invention.

Fig. 23 is a right side view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention.

Fig. 24 is a top view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention.

Fig. 25 is a bottom view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention.

Fig. 26 is a cross-sectional view A-A in a front view of the tool holder of fig. 15 (C) of embodiment 12 of the invention.

Fig. 27 is a perspective view of the tool holder of fig. 15 (C) according to embodiment 12 of the present invention.

Fig. 28 is a front view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the feature portion shown in solid lines and the other portion shown in broken lines.

Fig. 29 is a rear view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the characteristic parts shown in solid lines and the other parts shown in broken lines.

Fig. 30 is a left side view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the feature indicated by solid lines and the other indicated by broken lines.

Fig. 31 is a right side view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the feature indicated by solid lines and the other indicated by broken lines.

Fig. 32 is a plan view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the characteristic portions shown in solid lines and the other portions shown in broken lines.

Fig. 33 is a bottom view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the feature shown in solid lines and the other parts shown in broken lines.

Fig. 34 is a sectional view A-A in a front view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the feature indicated by a solid line and the other indicated by a broken line.

Fig. 35 is a perspective view of the tool holder of fig. 15 (C) of embodiment 12 of the present invention, with the characteristic portion shown by solid lines and the other portion shown by broken lines.

Fig. 36 is a front view of a portion of the tool holder of fig. 15 (C) of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided.

Fig. 37 is a rear view of a portion of the tool holder of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided in fig. 15 (C).

Fig. 38 is a left side view of a portion of the tool holder of fig. 15 (C) of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided.

Fig. 39 is a right side view of a portion of the tool holder of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided in fig. 15 (C).

Fig. 40 is a plan view of a portion of the tool holder of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided in fig. 15 (C).

Fig. 41 is a bottom view of a portion of the tool holder of fig. 15 (C) of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided.

Fig. 42 is a cross-sectional view A-A in a front view of a portion of the tool holder of fig. 15 (C) of embodiment 12 of the invention where the protruding portion of the direction conversion portion is provided.

Fig. 43 is a perspective view of a portion of the tool holder of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided in fig. 15 (C).

Fig. 44 is a front view of the tool holder of embodiment 12 of fig. 15 (C) in which the characteristic portion of the protrusion provided with the direction conversion portion is shown by a solid line and the other portion is shown by a broken line.

Fig. 45 is a rear view of the tool holder of embodiment 12 of fig. 15 (C) in which the characteristic portion of the protrusion provided with the direction conversion portion is shown by a solid line and the other portion is shown by a broken line.

Fig. 46 is a left side view of the tool holder of embodiment 12 of the present invention in which the characteristic portion of the protrusion portion provided with the direction conversion portion is shown by a solid line and the other portion is shown by a broken line.

Fig. 47 is a right side view of a portion of the tool holder of embodiment 12 of fig. 15 (C) in which the protruding portion of the direction conversion portion is provided, the characteristic portion being indicated by a solid line and the other portion being indicated by a broken line.

Fig. 48 is a plan view of the tool holder of embodiment 12 of the present invention in which the characteristic portion of the protrusion portion provided with the direction conversion portion is shown by a solid line and the other portion is shown by a broken line.

Fig. 49 is a bottom view of a portion of the tool holder of embodiment 12 of fig. 15 (C) in which the protruding portion of the direction conversion portion is provided, the characteristic portion being shown by a solid line and the other portion being shown by a broken line.

Fig. 50 is a cross-sectional view A-A in a front view of a portion of the tool holder of fig. 15 (C) of embodiment 12 of the present invention where the protruding portion of the direction conversion portion is provided, the portion being indicated by a solid line and the other portion being indicated by a broken line.

Fig. 51 is a perspective view of a part of the tool holder of embodiment 12 of fig. 15 (C) in which the protruding portion of the direction conversion portion is provided, the characteristic part being shown by a solid line and the other part being shown by a broken line.

Detailed Description

The machining cooling device according to embodiment 1 of the present invention shown in fig. 1 exemplifies boring machining by a turret lathe as a machining device, and is configured to: the cooling oil 7 is supplied from the tool setting portion 3 side to a portion where the work 2 set at the work setting portion 1 is machined by the tool 6, and the tool holder 5 set at the tool post 4 of the tool setting portion 3 provides support for the tool 6.

Then, an ejection port portion 10 is provided at the front surface of the side of the tool holder 4 facing the workpiece 2 so that the cooling oil 7 is directed toward the outer peripheral surface of the protrusion portion 8 protruding from the tool holder 4 of the tool holder 5 to the workpiece 2 side and ejected to the space 9. The ejection port portion 10 may also be configured to have an ejection nozzle.

Further, at the protruding portion 8, a direction switching portion 11 is provided so that the cooling oil 7 ejected from the ejection port portion 10 to the space 9 is introduced from the outer peripheral surface of the protruding portion 8 and is led out from the front surface of the side of the protruding portion 8 facing the workpiece 2 toward the processed portion formed by the workpiece 2 and the tool 6.

In addition, both the inlet 12 of the cooling oil 7 on the outer peripheral surface of the protrusion 8 and the outlet 13 of the cooling oil 7 on the front surface of the protrusion 8 in the direction conversion part 11 are configured to be open.

Hereinafter, the inlet 12 of the cooling oil 7 is denoted as inlet 12, and the outlet 13 of the cooling oil 7 is denoted as outlet 13.

According to the working cooling device shown in fig. 1, since the outlet 13 of the direction conversion portion 11 is provided at the front surface of the protrusion portion 8, the outlet 13 can be arranged near the tool 6 supported by the tool holder 5, and since the outlet 13 is arranged adjacent to the tool 6 supported by the tool holder 5, the cooling oil 7 is ejected in parallel from the outlet 13 adjacent to and in contact with the outer surface of the tool 6.

Therefore, even if the processing of the workpiece 2 by the tool 6 proceeds to the depth of the workpiece 2, most of the cooling oil 7 ejected from the outlet 13 does not bounce at the front surface of the workpiece 2 facing the ejection port portion 10, but reaches the processing portion formed by the tips of the blade portions 18 of the workpiece 2 and the tool 6 located in the depth of the workpiece 2 via the gap between the inner hole 23 of the workpiece 2 and the tool 6, and the processing portion formed by the workpiece 2 and the tool 6 is well cooled by the cooling oil 7.

In fig. 1, a portion between the inlet 12 and the outlet 13 of the direction conversion portion 11 opens at the outer peripheral surface and the front surface of the protrusion portion 8, and has an arc-shaped bottom portion in which the depth from the outer peripheral surface to the inside of the protrusion portion 8 becomes deeper as going from the inlet 12 on the tool holder 4 side to the outlet 13 on the workpiece setting portion 1 side becomes a groove shape, so that the structure of the direction conversion portion 11 is simple.

At a workpiece setting portion 1 of a workpiece chuck called a turret lathe, a workpiece 2 is set to be caught from the outside by a plurality of claws 15 provided at the workpiece setting portion 1. The workpiece 2 provided at the workpiece setting portion 1 is driven to rotate in association with the rotational drive of the workpiece setting portion 1 so as to revolve around a center line of the workpiece setting portion 1 extending in the lateral direction in one direction about the center line as a rotation center. A tool 6 called a boring bar is mounted to one tool post 4 of the tool setting part 3 called a turret of a turret lathe with a tool holder 5 interposed therebetween.

Specifically, inside the tool holder 4, a holder accommodating hole 16 is formed laterally from the front surface of the side of the tool holder 4 facing the workpiece 2 toward the rear end side. The tool 6 comprises a main body portion 17, a blade portion 18, and a mounting portion 19 on the tool holder 5. The main body 17 is located on the side facing the workpiece 2 and has a bar shape long in the lateral direction. The blade portion 18 is provided at a front end portion of the side of the main body portion 17 facing the workpiece 2. The mounting portion 19 is formed in a rod shape extending concentrically from the main body portion 17 to the rear side.

The tool holder 5 includes a projection 8, a mounting portion 21 on the tool post 4, and a tool receiving hole 22. The protrusion 8 has a larger outer shape than the mounting portion 21. The mounting portion 21 has a shape smaller than the protrusion 8. A tool receiving hole 22 is formed laterally at the center portion of the tool holder 5 from the front surface of the side facing the workpiece setting portion 1 toward the mounting portion 21 side. Then, the mounting portion 19 of the tool 6 is received and fixed in the tool receiving hole 22 from the front side of the tool holder 5, and the main body portion 17 and the blade portion 18 of the tool 6 protrude from the protruding portion 8 of the tool holder 5 to the side facing the workpiece 2.

In fig. 1, the following is illustrated: at the work 2 provided at the work setting portion 1, an inner hole 23 is formed in advance in a barrel shape from the front surface of the work 2 on the side facing the tool setting portion 3 toward the inside by a tool not shown mounted at a tool post not shown provided at the tool setting portion 3 other than the tool 6.

Then, in a state in which the workpiece 2 is driven to rotate by the workpiece setting portion 1 and the main body portion 17 and the blade portion 18 of the tool 6 are inserted into the interior of the internal hole 23 from the opening of the internal hole 23 in the workpiece 2 on the side facing the tool setting portion 3, the blade portion 18 machines a bore having a larger diameter than the internal hole 23 by the movement of the tool rest 4 in the outer side in the radial direction with respect to the rotation of the workpiece 2 and the movement in the lateral direction extending toward the center line with respect to the rotation of the workpiece 2 in association with the machining operation of the tool rest 4 with respect to the tool setting portion 3. That is, in the case of machining a workpiece with the tool 6, the workpiece 2 is rotationally driven, and the tool 6 may be moved radially outward with respect to the rotation of the workpiece 2 and moved laterally with respect to the rotation of the workpiece 2, but may be applied to at least the case of moving in the lateral direction with respect to the rotation of the workpiece 2.

The cooling oil pressurized to a predetermined pressure is supplied from a supply source, not shown, to the injection port portion 10 via a supply path, not shown, provided at the inside of the tool holder 4, and the supplied cooling oil 7 is injected from the injection port portion 10 toward the inlet 12 to a space on the front side of the tool holder 4. Since the cooling oil is injected from the injection port portion to the space, the injection port portion and the direction changing portion of the protruding portion do not need to be connected by piping, and in the case of replacing the tool holder, only the tool holder needs to be detached from the tool rest, and the tool holder can be easily replaced.

During the movement of the cooling oil 7 injected into the space from the inlet 12 toward the outlet 13 via the direction changing portion 11, the injection direction of the cooling oil 7 is changed from the diameter direction of the tool holder 5 to the direction parallel to the center line of the tool 6 toward the gap between the main body portion 17 and the inner hole 23 of the tool 6.

Therefore, the cooling oil 7 injected from the direction changing portion 11 into the gap between the main body portion 17 and the inner hole 23 reaches the processing portion formed by the workpiece 2 and the blade portion 18, and satisfactorily cools both the workpiece 2 and the blade portion 18. The cooling oil 7 obtained by cooling both the workpiece 2 and the blade 18 passes through a cooling oil recovery path, not shown, and returns to a supply source, not shown, after chips are removed by a filter provided in the cooling oil recovery path.

In the working cooling device according to embodiment 2 of the present invention shown in fig. 2, a cover 25 for covering an opening on the outer peripheral surface side of the protruding portion 8 in the groove-like direction conversion portion 11 is provided at the protruding portion 8 to prevent scattering of the cooling oil 7 entering the direction conversion portion 11.

In the working cooling device according to embodiment 3 of the present invention shown in fig. 3, a correction pipe 26 such as a bent pipe joint, which is called an elbow, is provided at the injection port 10, and the space distance between the correction pipe 26 and the inlet 12 is reduced, so that the cooling oil 7 injected from the correction pipe 26 into the space is easily injected into the inlet 12. In addition, if the direction of the cooling oil 7 is corrected so that the cooling oil 7 discharged from the correction pipe 26 is parallel to the front surface of the tool holder 4 on the side facing the workpiece 2, the inlet 12 may be provided at a position close to the tool holder 4 side, the path of the direction changing portion 11 may be lengthened, and the discharge direction of the cooling oil 7 discharged from the outlet 13 may be stabilized.

In the working cooling device according to embodiment 4 of the present invention shown in fig. 4, the direction conversion portion 11 provided in the tool holder 5 is formed in a hole shape. That is, the direction switching portion 11 has a longitudinal hole recessed from the outer peripheral surface of the tool holder 5 on the inlet 12 side toward the inside in the diameter direction, and a lateral hole extending from the front surface of the tool holder 5 on the outlet 13 side facing the workpiece 2 in a direction parallel to the center line of the tool 6 to be connected to the longitudinal hole, the cooling oil 7 ejected from the ejection port portion 10 or the correction pipe 26 to the inlet 12 via the space on the front surface side of the tool holder 4 is guided from the direction switching portion 11 to the outlet 13 without escaping to the outside, and the ejection direction of the cooling oil 7 from the outlet 13 via the space between the workpiece 2 and the tool holder 5 becomes stable. The correction tube 26 is removed in fig. 4 and can be applied.

In the working cooling device according to embodiment 5 of the present invention shown in fig. 5, a receiving wall 27 is provided around the inlet 12 of the tool holder 5 so as to protrude to the outside in the diameter direction of the tool holder 5, and the receiving wall 27 is configured to guide the cooling oil 7 ejected from the ejection port 10 to the inlet 12 of the direction conversion part 11 in the space on the front surface side of the tool holder 4. The housing wall 27 has a structure such as a hood having a coating portion that uses one divided pipe obtained by dividing the pipe into two along a center line extending in the vertical direction of the pipe, and has an upper end portion protruding to the ejection port 10 side. Although not shown in fig. 5, the end of the housing wall 27 is spherical and forms a ball joint slidably supported in a housing recess provided around the inlet 12 of the tool holder 5, and the inclination of the housing wall 27 may be adjustable.

In the working cooling device of embodiment 6 of the present invention shown in fig. 6, a taper drill is configured to be provided as the cutter 6 at the tool holder 4. That is, since the outer shape of the mounting portion 19 of the tool 6 is tapered as going rearward from the work 2 side, the tool receiving hole 22 of the tool holder 5 is tapered to match the tapered shape. Thereby, the mounting portion 19 of the tool 6 is fitted into and fixed to the tool receiving hole 22 with being received in the tool receiving hole 22 from the front side of the tool holder 5.

Then, since the outlet 13 of the direction conversion portion 11 is provided at the front surface of the protrusion portion 8, the outlet 13 can be arranged in the vicinity of the tool 6 supported by the tool holder 5, and since the outlet 13 is arranged so as to be adjacent to the tool 6 supported by the tool holder 5, the cooling oil 7 is ejected in parallel from the outlet 13 so as to be adjacent to and in contact with the outer surface of the tool 6.

Therefore, when the helical blade portion 18 formed from the tip of the main body portion 17 of the tool 6 to the rear of the main body portion 17 machines the barrel-shaped inner hole 28 at the workpiece 2, even if the machining of the workpiece 2 by the tool 6 enters into the deep of the workpiece 2, most of the cooling oil 7 ejected from the outlet 13 does not bounce at the front surface of the workpiece 2 facing the ejection port portion 10, but reaches the machined portion formed by the tips of the blade portions 18 of the workpiece 2 and the tool 6 located in the deep of the workpiece 2 via the gap between the inner hole 23 of the workpiece 2 and the tool 6, and the machined portion formed by the workpiece 2 and the tool 6 is well cooled by the cooling oil 7. The correction tube 26 is removed in fig. 6 and can be applied.

In the machining cooling device of embodiment 7 of the present invention shown in fig. 7, using the so-called straight shaft tool holder 5 for setting the drill chuck 31 at the tool holder 4, the outlet 13 is provided at the center portion of the tip tapered portion 32 protruding from the protrusion portion 8 of the tool holder 5 to the workpiece 2 side, the cooling oil 7 ejected from the ejection port portion 10 or the correction pipe 26 to the inlet 12 via the space on the front surface side of the tool holder 4 is guided from the direction conversion portion 11 to the outlet 13 without escaping to the outside, and both the workpiece 2 and the blade portion 18 are cooled from the outlet 13 through the clearance between the core hole 33 of the drill chuck 31 and the tool 6 called drill bit supported by the claw 34 via the claw 34 to the machining portion formed by the workpiece 2 and the blade portion 18. In fig. 7, the correction tube 26 may also be removed and the same applies even if the drill chuck is replaced with a collet chuck. In fig. 7, the storage wall 27 of fig. 5 may be used instead of the correction tube 26.

The tool holder 5 of embodiment 8 of the present invention shown in fig. 8 to 11 includes three direction switching portions 11. The three direction switching portions 11 are configured independently of each other such that the cooling oil 7 injected into the inlet 12 formed by opening at the outer peripheral surface of the protrusion portion 8 of the tool holder 5 in the circumferential direction is discharged from the outlet 13 formed by opening at the front surface of the protrusion portion 8 in the circumferential direction. Inside each outlet 13, a rectifying member 35 for concentrating the flow of the cooling oil 7 emitted from the outlet 13 into the space in a predetermined direction is provided.

At a portion where the outer peripheral surface and the front surface of the protrusion 8 intersect, a chamfer 36 is formed in a ring shape around the outer peripheral surface. The chamfer 36 is a slope gradually changing to a downward gradient as going from the rear side to the front side (see fig. 10).

As shown in fig. 8 and 10, at the protruding portion 8, a fastening screw 37 for fixing the tool 6 (refer to fig. 6) to the tool holder 5 is provided so as not to interfere with the direction switching portion 11. Specifically, in a manner that the direction conversion portion 11 is located on the upper side as shown in fig. 8, in a case where the tool holder 5 is viewed from the front side, the fastening screw 37 is provided at three positions in total, that is, two right-left positions where one straight line extending in the right-left direction through the center of the tool holder 5 intersects the outer peripheral surface of the protruding portion 8, and one position where one straight line extending in the up-down direction through the center of the tool holder 5 intersects the lower portion of the outer peripheral surface of the protruding portion 8. Further, as shown in fig. 10, fastening screws 37 are individually mounted at screw holes 38 penetrating the outer peripheral surface of the protruding portion 8 and the tool receiving hole 22.

Further, as shown in fig. 8 and 11, four mounting plane portions 39 are formed at the outer peripheral surface of the mounting portion 21 of the tool holder 5. As shown in fig. 11, two of the four mounting planar portions 39 are parallel to each other with the center of the tool holder 5 sandwiched on the center line L1, and the other two mounting planar portions 39 are parallel to each other with the center of the tool holder 5 sandwiched on the center line L2 orthogonal to the center line L1.

Since four mounting plane parts 39 are provided, the tool holder 5 can correspond to the tool post 4 of a processing machine manufactured by various manufacturing companies. Specifically, the positional relationship between the fastening screw 40 for fixing the tool holder 5 to the tool post 4 and the ejection port portion 10 varies depending on various manufacturing companies of the processing machine.

In developing the tool holder 5, as a result of examining the positions where the fastening screws 40 are provided with respect to the tool holders 4 manufactured by various manufacturing companies, it was found that, in the case where the tool holders 4 are placed such that the ejection port portion 10 is located above the holder receiving hole 16 as shown in fig. 12, the fastening screws 40 are provided at the upper surface as in the tool holder 4A, or at the right side surface as in the tool holder 4B, or at the lower surface as in the tool holder 4C, or at the left side surface as in the tool holder 4D. According to the investigation result, as shown in fig. 11, four mounting plane portions 39 are provided at the mounting portion 21 of the tool holder 5. When the tool holder 5 is viewed from the front surface, the upper mounting plane portion 39 of the four mounting plane portions 39 is denoted 39A, the right mounting plane portion 39 is denoted 39B, the left mounting plane portion 39 is denoted 39C, and the lower mounting plane portion 39 is denoted 39D to distinguish each of the four mounting plane portions 39.

The following is illustrated in fig. 12: in the tool holder 4A, a fastening screw 40 for fixing the tool holder 5 to the tool holder 4A is provided at an upper surface extending rearward from an upper edge of a front surface provided with the ejection port 10, in the tool holder 4B, a fastening screw 40 for fixing the tool holder 5 to the tool holder 4B is provided at a right side surface extending rearward from a right edge of the front surface provided with the ejection port 10, in the tool holder 4C, a fastening screw 40 for fixing the tool holder 5 to the tool holder 4C is provided at a lower surface extending rearward from a lower edge of the front surface provided with the ejection port 10, and in the tool holder 4D, a fastening screw 40 for fixing the tool holder 5 to the tool holder 4D is provided at a left side surface extending rearward from a left edge of the front surface provided with the ejection port 10.

A combination of tool holders 5 and tool holders 4A to 4D according to embodiment 9 of the present invention shown in fig. 12 will be described. In fig. 12, in the case of mounting the tool holder 5 at the tool post 4A, after the mounting portion 21 having four mounting flat surface portions 39 (39A, 39B, 39C, 39D of fig. 11) at the outer peripheral surface of the tool holder 5, which is circular in plan view, is inserted into the holder accommodating hole 16 of the tool post 4A, the fastening screw 40 is guided by a manual operation to the female screw to which the fastening screw 40 is mounted using a fastening tool such as a screwdriver not shown while traveling to the holder accommodating hole 16 side, and the tip of the fastening screw 40 abuts against the mounting flat surface portion 39A of the upper side of the tool holder 5, thereby fixing the tool holder 5 at the tool post 4A.

Further, in fig. 12, in the case where the tool holder 5 is mounted at the tool post 4B, after the mounting portion 21 having four mounting plane portions 39 (39A, 39B, 39C, 39D of fig. 11) at the outer peripheral surface of the tool holder 5, which is circular in plan view, is inserted into the holder accommodating hole 16 of the tool post 4B, the fastening screw 40 is guided by a manual operation to the female screw to which the fastening screw 40 is mounted using a fastening tool such as a screwdriver not shown while advancing to the holder accommodating hole 16 side, and the tip of the fastening screw 40 abuts against the mounting plane portion 39B on the right side of the tool holder 5, the tool holder 5 is fixed at the tool post 4B.

Further, in fig. 12, in the case where the tool holder 5 is mounted at the tool post 4C, after the mounting portion 21 having four mounting plane portions 39 (39A, 39B, 39C, 39D of fig. 11) at the outer peripheral surface of the tool holder 5, which is circular in plan view, is inserted into the holder accommodating hole 16 of the tool post 4C, which is circular in plan view, the fastening screw 40 is guided by a manual operation using a fastening tool such as a screwdriver, which is not shown, to the female screw to which the fastening screw 40 is mounted while advancing to the holder accommodating hole 16 side, and the tip of the fastening screw 40 abuts against the mounting plane portion 39 of the right side of the tool holder 5, that is, the mounting plane portion 39C of fig. 11, thereby fixing the tool holder 5 at the tool post 4C.

Further, in fig. 12, in the case where the tool holder 5 is mounted at the tool post 4D, after the mounting portion 21 having four mounting plane portions 39 (39A, 39B, 39C, 39D of fig. 11) at the outer peripheral surface of the tool holder 5, which is circular in plan view, is inserted into the holder accommodating hole 16 of the tool post 4D, the fastening screw 40 is guided by a manual operation to the female screw to which the fastening screw 40 is mounted using a fastening tool such as a screwdriver not shown while advancing to the holder accommodating hole 16 side, and the tip of the fastening screw 40 abuts against the mounting plane portion 39 of the left side of the tool holder 5, that is, the mounting plane portion 39D of fig. 11, thereby fixing the tool holder 5 at the tool post 4D.

The results of examining the positions of the fastening screws 40 for the tool holders 4 manufactured by various manufacturing companies when developing the tool holder 5 according to the embodiment 10 of the present invention shown in fig. 13 will be described. In fig. 13, it can be understood that all the examined ejection port portions 10 are concentrated in the range of two straight lines L3 and L4 having an angle θ1 of 30 degrees to 45 degrees from the center line L1 toward the center line L2 in an upper portion between the center line L1 extending in the up-down direction through the center P1 of the protrusion portion 8 of the tool holder 5 and the center line L2 extending in the left-right direction through the center P1, as shown by imaginary lines. Based on the investigation result, the inlet 12 and the outlet 13 in the three direction conversion sections 11 are provided separately at three locations where the center line L2 intersects with one circumference L5 of the two straight lines L3 and L4 centered on the center P1, so that the tool holder 5 can correspond to the tool rest 4 of the processing machine manufactured by various manufacturing companies. Further, the most preferable angle is θ1=35 degrees. Further, at two places where the straight lines L3 and L4 intersect the circumference L5, the inlet 12 and the outlet 13 in the direction conversion portion 11 may be provided alone, and at any one place where the straight lines L3 and L4 intersect the circumference L5, the inlet 12 and the outlet 13 in one direction conversion portion 11 may be provided alone.

The results of verifying the angles of the vertical hole on the inlet 12 side and the horizontal hole on the outlet 13 side of the direction conversion unit 11 when developing the tool holder 5 of the embodiment 11 of the present invention will be described with reference to fig. 14.

In fig. 14, it is found that the cooling oil 7 is ejected in a bundle and is not scattered from the outlet 13, and that the angle θ2 formed by the center line L6 extending in the vertical direction of the inlet 12 side and the center line L7 extending in the horizontal direction of the tool storage hole 22 is in an allowable range, preferably 45 to 55 degrees, and 50 degrees, and the angle θ3 formed by the center line L8 extending in the horizontal direction of the outlet 13 side and the center line L7 extending in the horizontal direction of the tool storage hole 22 is in an allowable range, preferably 0 to 15 degrees, and most preferably 5 to 10 degrees. Further, it was confirmed that when the bottom 41 where the vertical hole on the inlet 12 side and the horizontal hole on the outlet 13 side intersect was formed in an arc shape recessed downward, θ3 was 0 degrees, that is, the cooling oil 7 was led out from the outlet 13 in parallel with the center line L7.

The results of verification of the relationship among the three direction changing portions 11, the tool receiving hole 22, and the fastening screw 37 in the tool holder 5 according to embodiment 12 of the present invention will be described with reference to fig. 15. As shown in fig. 15 (a), since the diameter of the tool receiving hole 22 is large, if the fastening screw 37 is not disturbed even if the inlet 12 and the outlet 13 of the direction changing section 11 are each provided individually three, the cooling oil 7 is ejected in a bundle and does not fly from the outlet 13, which is an optimal structure.

However, as shown in fig. 15 (B), since the diameter of the tool receiving hole 22 is small, even if the inlet 12 and the outlet 13 of the direction changing section 11 are each provided individually three without interfering with the fastening screw 37, the adjacent portions of the three outlets 13 are connected to each other, and it is confirmed that the cooling oil 7 is scattered from the three outlets 13 connected to each other, and the cooling oil 7 is poorly ejected.

Therefore, since the diameter of the tool receiving hole 22 is small, even if the inlet 12 and the outlet 13 of the direction conversion portion 11 are each provided individually three without interfering with the fastening screw 37, the adjacent portions of the three outlets 13 are connected to each other, as shown in (C) of fig. 15, the inlet 12 of the direction conversion portion 11 is 3 and the outlets 13 are concentrated into one, so that interfering with the fastening screw 37 is avoided, and the cooling oil 7 is ejected in a bundle without scattering from one outlet 13, which is an optimal configuration.

That is, in the case where the diameter of the tool receiving hole 22 is small and it is difficult to provide three outlets 13 without interfering with the fastening screw 37, as shown in (C) of fig. 15, by being integrated into one outlet 13, the cooling oil 7 is ejected in a bundle without scattering.

The direction conversion portion 11 of the tool holder 5 according to the embodiment 13 of the present invention shown in fig. 16 (a) to 16 (C) is formed as a flat slope which gradually becomes a downward gradient as going from the inlet 12 side to the outlet 13 side, and is located above the tool receiving hole 22 of the protrusion 8. According to this structure, the direction conversion section 11 is simple in structure. The portion between the inlet 12 and the outlet 13 of the direction conversion portion 11 opens at the outer peripheral surface and the front surface of the protrusion portion 8. As shown in fig. 16 (a), the direction changing portion 11 is cut straight in the left-right direction, and does not have a shape that is curved and projected in the upper direction as the chamfer portion 36 shown in fig. 9. Therefore, it is possible to prevent the injection direction of the cooling oil 7 from being divided into the left and right directions when the cooling oil 7 hits the flat inclined surface.

In addition, in the case where the tool holder 5 is viewed from the side surface as shown in (B) in fig. 16, the angle θ4 formed by the flat slope of the direction conversion portion 11 and the center line L7 extending in the lateral direction of the tool receiving hole 22 is not particularly limited, but may be set to the angle θ3 in fig. 14. By making this angle, the cooling oil can be further ejected in parallel from the outlet close to each other along the outer surface of the tool in a contact manner.

Further, the tool holder 5 shown in fig. 16 (D) to 16 (F) is configured such that three flat inclined surfaces as the direction conversion portions 11 are provided adjacent to the protruding portions 8 in the left-right direction. In the case where a plurality of flat inclined surfaces as the direction conversion portion 11 are provided, each of the angles θ4 formed by the flat inclined surfaces of the direction conversion portion 11 and the center line L7 extending in the lateral direction of the tool receiving hole 22 may be set to the angle θ3 of fig. 14.

Further, as shown in (D) of fig. 16, it is preferable that angles (angles on the center P1 side) θ5 and θ6 formed by two flat slopes of the adjacent direction conversion parts 11 in the case where the direction conversion parts 11 are viewed from the front surface side be 135 degrees to 150 degrees. With this configuration, as shown in fig. 13, the tool holder 5 can be preferably used for the tool rest 4 of the processing machine manufactured by various manufacturing companies. In addition, for the most preferred angles, the angles of θ5 and θ6 are 145 degrees.

The angles of θ5 and θ6 may be the same angle or different angles. The direction conversion unit 11 may be provided with two, four, or five or more. In the case where a plurality of direction conversion sections 11 are provided, a plurality may be provided alone or in an adjacent manner.

The direction conversion portion 11 of the tool holder 5 according to the embodiment 14 of the present invention shown in fig. 17 (a) to 17 (C) is formed as a flat slope gradually changing to a downward gradient as going from the inlet 12 side to the outlet 13 side, and is composed of a steep slope on the inlet 12 side and a gentle slope on the outlet 13 side, at an upper portion above the tool receiving hole 22 of the protrusion 8. The sharp inclined plane is a flat inclined plane. In addition, the gentle slope is a flat slope. As shown in fig. 17 (a), the sharp inclined surface and the gentle inclined surface are cut straight in the left-right direction, and do not have a shape that is curved and projected in the upper direction as the chamfer 36 shown in fig. 9. Therefore, it is possible to prevent the injection direction of the cooling oil 7 from being divided into the left and right directions when the cooling oil 7 hits the steep slope and the gentle slope.

In the case where the tool holder 5 is viewed from the side surface as shown in fig. 17 (B), the angle θ7 formed by the steep slope on the inlet 12 side and the center line L7 extending in the lateral direction of the tool receiving hole 22 is not particularly limited, but may be set to the angle θ2 in fig. 14. The sharp inclined surface on the inlet 12 side is configured as an inclined surface which gradually becomes a downward gradient as going from the inlet 12 side to the outlet 13 side.

In the case where the tool holder 5 is viewed from the side surface as shown in fig. 17 (B), the angle θ8 formed by the gentle slope on the outlet 13 side and the center line L7 extending in the lateral direction of the tool receiving hole 22 is not particularly limited, but may be set to the angle θ3 in fig. 14. If this angle is the case, the cooling oil may be further ejected from the outlet in parallel close proximity along the outer surface of the tool and in contact. The gentle slope on the outlet 13 side is configured to gradually become a slope of a downward gradient as going from the inlet 12 side to the outlet 13 side. The number of the direction changing units 11 is not limited to one, and may be two, three, four, or five or more.

Although not shown, as in fig. 16 (D) to 16 (F), a plurality of direction switching portions 11 each including a steep slope on the inlet 12 side and a gentle slope on the outlet 13 side may be provided adjacent to the protrusion portion 8 in the left-right direction.

When a plurality of abrupt slopes and gentle slopes are provided as the direction changing portion 11, each of the angles θ7 formed by the abrupt slopes of the direction changing portion 11 and the center line L7 extending in the lateral direction of the tool receiving hole 22 may be set to the angle θ2 of fig. 14. Further, each of the angles θ8 formed by the gentle slope on the outlet 13 side of the direction conversion section 11 and the center line L7 extending in the lateral direction of the tool receiving hole 22 may be set to the angle θ3 of fig. 14.

Preferably, the angle formed by the gentle slopes on the two outlet 13 sides of the adjacent direction conversion section 11 (the angle on the center P1 side) in the case where the direction conversion section 11 is viewed from the front surface side is 135 degrees to 150 degrees. With this configuration, as shown in fig. 13, the tool holder 5 can be preferably used for the tool rest 4 of the processing machine manufactured by various manufacturing companies. In addition, the most preferred angle formed is 145 degrees.

The angles formed by the gentle slopes on the two outlet 13 sides of the adjacent direction conversion sections 11 (the angles on the center P1 side) in the case of viewing the direction conversion section 11 from the front surface side may be the same angle or may be different angles. In the case where a plurality of direction conversion units 11 are provided, a plurality may be provided alone or in an adjacent manner.

In addition, in the embodiments of the present invention, the configuration in which the tool holder 4 and the tool holder 5 are separate members is exemplified, but the tool holder 4 and the tool holder 5 may be integrally configured. That is, it is also possible to provide the protrusion 8 at the front surface of the tool holder 4, and to support the tool 6 at the protrusion 8 and provide the direction conversion portion 11. Further, the tool 6 may be provided with a protrusion 8 having a direction conversion portion 11. In this case, as shown in fig. 20 to 51, the protruding portion 8 of the tool holder 5 from which the attachment portion 21 is removed may be detachably provided to the tool 6, or the protruding portion 8 may be provided in an integrated structure to the tool 6. The direction conversion portion 11 in the protruding portion 8 of the tool holder 5 from which the mounting portion 21 is removed can be applied to embodiments 1 to 14 of the present invention.

Description of the reference numerals

Tool setting part 1

Workpiece 2

Tool setting part 3

Knife rest 4

Tool holder 5

Tool 6

Cooling oil 7

Protrusion 8

Space 9

Spray nozzle 10

Direction conversion part 11

Inlet 12

Outlet 13

Claw 15

Retainer receiving hole 16

Body portion 17

Knife part 18

Mounting portion 19

Mounting portion 21

Tool receiving hole 22

An inner bore 23

Bore 24

Cover 25

Correcting tube 26

Storage wall 27

Internal bore 28

Drill chuck 31

Tip taper 32

Core hole 33

Rectifying member 35

Chamfer portion 36

Fastening screw 37

Mounting plane portion 39

Fastening screw 40

Bottom 41

Claims

1. A machining cooling device for cooling a portion of a workpiece disposed at a workpiece disposition portion by a tool supported by a tool rest in the tool disposition portion with cooling oil, characterized in that the machining cooling device has a protrusion portion at which a direction switching portion is disposed such that cooling oil ejected from an ejection port portion into a space is introduced from an outer peripheral surface of the protrusion portion and is led out from a front surface of the protrusion portion toward the machining portion, both of the introduction portion and the discharge portion of the cooling oil in the direction switching portion being configured to be open,

wherein the injection port portion injects the cooling oil toward the introduction portion to an open space between the introduction portion and the injection port portion, and the cooling oil injected to the space moves from the introduction portion toward the discharge portion via the direction conversion portion.

2. A tool holder for supporting a tool at a tool post in a tool setting portion with respect to a workpiece provided at the workpiece setting portion, characterized in that a direction conversion portion is provided at a projection portion of the tool holder projecting from a front surface of the tool post around the tool to the workpiece side such that cooling oil ejected from an ejection port portion of a front surface of the tool post facing the side of the workpiece is introduced from an outer peripheral surface of the projection portion and guided out from the front surface of the projection portion toward a processing portion, both an introduction portion and a guide-out portion of the cooling oil in the direction conversion portion being configured to be open,

3. A tool rest for supporting a tool at a tool setting portion with respect to a workpiece provided at the workpiece setting portion, characterized in that an injection port is provided at a front surface of a side of the tool rest facing the workpiece such that cooling oil is injected into a space toward an outer peripheral surface of a protrusion portion protruding from the front surface to a workpiece side around the tool, a direction conversion portion is provided at the protrusion portion such that cooling oil injected from the injection port is introduced from the outer peripheral surface of the protrusion portion and is led out from the front surface of the protrusion portion toward a processing portion, both of an introduction portion and an exit portion of the cooling oil in the direction conversion portion are configured to be opened,

4. The working cooling device according to claim 1, wherein the direction changing portion is provided in an upper portion between a center line extending in an up-down direction through a center of the protruding portion and a center line extending in a left-right direction through the center, an angle θ1 from the center line extending in the up-down direction toward the center line extending in the left-right direction through the center has a portion where a straight line of 30 degrees to 45 degrees intersects one circumference with the center as a center, and is provided at a portion where the center line extending in the up-down direction intersects the circumference.

5. The tool holder according to claim 2, wherein the direction conversion portion is provided in an upper portion between a center line extending in an up-down direction through a center of the protrusion portion and a center line extending in a left-right direction through the center, an angle θ1 from the center line extending in the up-down direction toward the center line extending in the left-right direction through the center has a portion where a straight line of 30 degrees to 45 degrees intersects one circumference with the center as a center, and is provided at a portion where the center line extending in the up-down direction intersects the circumference.

6. A tool holder according to claim 3, wherein said direction changing portion is provided in an upper portion between a center line extending in an up-down direction through a center of the protrusion portion and a center line extending in a left-right direction through the center, an angle θ1 from the center line extending in the up-down direction toward the center line extending in the left-right direction through the center has a portion where a straight line of 30 degrees to 45 degrees intersects one circumference centered on the center, and is provided at a portion where the center line extending in the up-down direction intersects the circumference.

7. The working cooling device according to claim 1, wherein an angle formed by a center line of the hole on the lead-in portion side and a center line of the tool receiving hole is 45 degrees to 55 degrees.

8. The tool holder according to claim 2, wherein an angle formed by a center line of the hole on the lead-in portion side and a center line of the tool receiving hole is 45 degrees to 55 degrees.

9. A tool holder according to claim 3, wherein an angle formed by a center line of the hole on the lead-in portion side and a center line of the tool receiving hole is 45 degrees to 55 degrees.

10. The working cooling device according to claim 1, wherein an angle formed by a center line of the hole on the lead-out portion side and a center line of the tool receiving hole is 0 degrees to 15 degrees.

11. The tool holder according to claim 2, wherein an angle formed by a center line of the hole on the lead-out portion side and a center line of the tool receiving hole is 0 degrees to 15 degrees.

12. A tool holder according to claim 3, wherein the angle formed by the centre line of the hole on the lead-out side and the centre line of the tool receiving hole is 0 to 15 degrees.

13. A machining cooling device for cooling a portion of a workpiece disposed at a workpiece disposition portion by a tool supported by a tool rest in the tool disposition portion with cooling oil, characterized in that the machining cooling device has a protrusion portion at which a direction conversion portion is disposed so that cooling oil ejected from an ejection port portion into a space is introduced from an outer peripheral surface of the protrusion portion and is led out from a front surface of the protrusion portion toward a machining portion, the direction conversion portion being configured as a flat slope that gradually changes to a downward gradient as going from an introduction portion side to a discharge portion side of the cooling oil,

14. A tool holder for supporting a tool at a tool post in a tool setting portion with respect to a workpiece provided at the workpiece setting portion, characterized in that a direction conversion portion is provided at a projection portion of the tool holder projecting from a front surface of the tool post around the tool to the workpiece side such that cooling oil ejected from an ejection port portion of a front surface of the tool post facing the workpiece side is introduced from an outer peripheral surface of the projection portion and guided out from the front surface of the projection portion toward a processing portion, the direction conversion portion being configured as a flat slope that gradually becomes a downward gradient as going from an introduction portion side to a guide-out portion side of the cooling oil,

15. A tool holder supporting a tool at a tool setting portion with respect to a workpiece provided at the workpiece setting portion, characterized in that an injection port is provided at a front surface of a side of the tool holder facing the workpiece such that cooling oil is injected into a space toward an outer peripheral surface of a protrusion portion protruding from the front surface to a workpiece side around the tool, a direction conversion portion is provided at the protrusion portion such that cooling oil injected from the injection port is introduced from the outer peripheral surface of the protrusion portion and is led out from the front surface of the protrusion portion toward a processing portion, the direction conversion portion being configured as a flat slope that gradually becomes a downward gradient as going from an introduction portion side to a lead-out portion side of the cooling oil,

16. The tooling cooling according to claim 13, wherein the flat bevel forms an angle of 0 degrees to 15 degrees with a centerline of the tool receiving aperture.

17. The tool holder of claim 14 wherein the flat bevel forms an angle of 0 to 15 degrees with a centerline of the tool receiving aperture.

18. The tool holder of claim 15 wherein the flat bevel forms an angle of 0 to 15 degrees with a centerline of the tool receiving aperture.

19. A cooling method of cooling a portion of a workpiece disposed at a workpiece disposition portion by a tool supported by a tool rest in the tool disposition portion with cooling oil, characterized by cooling using the machining cooling device of claim 1, the machining cooling device of claim 13, the tool holder of claim 2, the tool holder of claim 14, the tool rest of claim 3, or the tool rest of claim 15.