Through coolant clamp for tool holder

Abstract

A tool holder for cooling a cutting insert is disclosed. The tool holder can include a tool holder body, a cutting insert mounted on the tool holder body, and a through coolant clamp mounted to the tool holder body that secures the cutting insert to the tool holder body and provides coolant fluid to the cutting insert. The through coolant clamp can include a base portion having a fluid chamber extending radially outward from the clamp screw bore. A nose extends radially outward from the base portion, and at least one nozzle is provided within the nose extending along a nozzle axis. The nozzle comprises a nozzle inlet and a nozzle outlet, and a nozzle surface is arranged between the nozzle inlet and the nozzle outlet. The through coolant clamp can further include a transition outer surface in fluid communication with the fluid chamber and the nozzle inlet. The transition outer surface forms a smooth transition between the fluid chamber and the coolant passage inlet that provides a controlled flow of coolant through the coolant clamp.

Description

Technical Field

[0001] The present invention relates to tool holders for cutting inserts and, more particularly, to a tool holder having a through coolant clamp for securing a cutting insert to the tool holder and for providing a controlled coolant flow to the cutting insert. Background Art

[0002] The cutting insert is typically secured to the tool holder by using a fixture. The cutting insert generates heat during operation, and a coolant may be used to cool the insert during use. The coolant may pass through the fixture and be directed to the cutting insert. However, due to operating conditions, the flow behavior of the coolant may not be optimal. Summary of the invention

[0003] The present invention provides a tool holder for cooling a cutting blade. The tool holder can include a tool holder body, a cutting blade mounted on the tool holder body, and a through-type coolant fixture mounted to the tool holder body, the through-type coolant fixture fixing the cutting blade to the tool holder body and providing a coolant fluid to the cutting blade. The through-type coolant fixture can include a base portion having a fluid chamber extending radially outward from a clamping screw hole. A nose portion extends radially outward from the base portion, and at least one nozzle extending along a nozzle axis is provided in the nose portion. The nozzle includes a nozzle inlet and a nozzle outlet, and a nozzle surface is provided between the nozzle inlet and the nozzle outlet. The through-type coolant fixture can also include a transition outer surface in fluid communication with the fluid chamber and the nozzle inlet. The transition outer surface forms a smooth transition between the fluid chamber and the coolant channel inlet, and the smooth transition provides a controlled flow of the coolant through the coolant fixture.

[0004] One aspect of the present invention is to provide a tool holder assembly, comprising: a tool holder body; a cutting blade, which is mounted on the tool holder body; a through-type coolant clamp, which is mounted on the tool holder body, the through-type coolant clamp is constructed and arranged to fix the cutting blade on the tool holder body and provide coolant fluid to the cutting blade, and the through-type coolant clamp includes a clamping screw hole with a longitudinal axis; and a clamping screw, which extends through the clamping screw hole to fasten the coolant clamp to the tool holder body, and the clamping screw includes an internal axial coolant fluid flow channel. The through-type coolant clamp includes: a base portion; a coolant fluid reservoir in the base portion, the coolant fluid reservoir extending radially rearward from the clamping screw hole around at least a portion of the clamping screw and in fluid communication with the internal axial coolant fluid flow channel of the clamping screw; a nose portion extending radially forward from the base portion; and at least one nozzle in the nose portion, the at least one nozzle extending along a nozzle axis. The at least one nozzle includes: a nozzle inlet, the nozzle inlet in fluid communication with the coolant fluid reservoir; a nozzle outlet, the nozzle outlet opposite the nozzle inlet; and a nozzle coolant channel, the nozzle coolant channel extending along a nozzle coolant channel axis between the nozzle inlet and the nozzle outlet; and a transition outer surface, the transition outer surface in fluid communication between the coolant fluid reservoir and the nozzle inlet of the at least one nozzle, thereby forming a smooth transition between the coolant fluid reservoir and the nozzle inlet, so that a transition angle between at least a portion of the transition surface and the nozzle coolant channel axis measured in a plane perpendicular to the longitudinal axis of the through-type coolant clamp is less than 60°.

[0005] Another aspect of the present invention is to provide a through-coolant fixture for providing coolant fluid to a cutting insert, comprising: a base portion; a coolant fluid storage chamber within the base portion, the coolant fluid storage chamber extending radially rearward from a clamping screw hole extending from a fixture top surface of the through-coolant fixture to a fixture bottom surface of the through-coolant fixture; a nose portion extending radially forward from the base portion; and at least one nozzle within the nose portion, the at least one nozzle extending along a nozzle axis. Each of the at least one nozzle includes: a nozzle inlet, which is fluidly connected to the coolant fluid storage chamber; a nozzle outlet, which is opposite to the nozzle inlet; and a nozzle coolant channel, which extends between the nozzle inlet and the nozzle outlet along a nozzle coolant channel axis; and a transition outer surface, which is fluidly connected between the coolant fluid storage chamber and the nozzle inlet of the at least one nozzle, thereby forming a smooth transition between the coolant fluid storage chamber and the nozzle inlet, so that a transition angle between at least a portion of the transition surface and the nozzle coolant channel axis measured in a plane perpendicular to the longitudinal axis of the through-type coolant fixture is less than 60°.

[0006] Another aspect of the present invention is to provide a clamping screw for a through-type coolant tool holder clamping assembly, the clamping screw comprising: a threaded lower portion; a head, which is located at an end of the clamping screw opposite to the threaded lower portion; an upper portion, which is located between the threaded lower portion and the head; an internal coolant axial flow channel, the internal coolant axial flow channel having an inlet opening adjacent to the threaded lower portion and extending to the upper portion; and at least one coolant radial channel, the at least one coolant radial channel being fluidly connected to the coolant axial flow channel and having a radial outlet opening passing through an outer surface of the upper portion.

[0007] These and other aspects of the invention will become apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is an isometric view of a tool holder assembly having a through-coolant clamp securing a cutting insert to the tool holder with a clamping screw in accordance with an embodiment of the present invention.

[0009] Figure 2 yes Figure 1 A top view of the tool holder assembly.

[0010] Figure 3 It passes through Figure 2 Section 3-3 of Figure 1 Side cross-sectional view of a tool holder assembly.

[0011] Figure 4is a top isometric view of a pass-through coolant fixture according to an embodiment of the present invention.

[0012] Figure 5 yes Figure 4 Side view of the through-coolant fixture.

[0013] Figure 6 It passes through Figure 5 A cross-sectional view of the through-type coolant fixture taken at section 6-6.

[0014] Figure 7 yes Figure 4 Top view of the through-coolant fixture.

[0015] Figure 8 It passes through Figure 7 A side cross-sectional view of the through-type coolant fixture taken at section 8-8.

[0016] Fig. 9 It passes through Figure 7 A side cross-sectional view of the through-type coolant fixture taken at section 9-9.

[0017] Fig.10 yes Figure 4 Front view of the through-coolant fixture.

[0018] Fig.11 yes Figure 4 Rear view of the pass-through coolant fixture.

[0019] Fig.12 is an isometric view of a clamping screw for securing a through-coolant fixture to a tool holder and delivering coolant to the through-coolant fixture in accordance with an embodiment of the present invention.

[0020] Fig.13 yes Fig.12 Side view of the clamping screw.

[0021] Fig.14 It passes through Fig.13 A side cross-sectional view of the clamping screw taken at section 14-14.

[0022] Fig.15 is a side view of a through-type coolant fixture according to another embodiment of the present invention.

[0023] Fig.16 yes Fig.15 Front view of the through-coolant fixture.

[0024] Fig.17 yes Fig.15 Top view of the through-coolant fixture.

[0025] Fig.18 is a side view of a through-type coolant fixture according to still another embodiment of the present invention.

[0026] Fig.19 yes Fig.18 Front view of the through-coolant fixture.

[0027] Fig. 20 yes Fig.18 Top view of the through-coolant fixture. DETAILED DESCRIPTION

[0028] The tool holder assembly of the present invention solves the above-mentioned problems by providing a through-coolant fixture that provides a controlled flow of cooling fluid under operating conditions by gradual changes in the surface within the through-coolant fixture, as described more fully below. As used herein, the term "fluid" refers to any flowable coolant, such as water, oil, other liquids and gases, which can pass through the through-coolant fixture to cool the cutting blade during the cutting operation of the tool holder.

[0029] refer to Figures 1 to 3 , a tool holder 10 according to an embodiment of the present invention is shown. The tool holder 10 includes a tool holder body 12 having a head 20 with a cutting insert receiving pocket 22 formed in the tool holder upper surface 14 at the tool holder corner 16 of the front end 18 of the head. The insert receiving pocket 22 may have a pocket bottom surface 24 and a pocket rear support wall 26.

[0030] In the illustrated embodiment, the cutting blade 30 is disposed in the blade receiving recess 22. The cutting blade 30 may have a blade top surface 32 and a generally diamond shape. However, it should be understood that the cutting blade 30 may have any suitable shape, such as a triangle, a rectangle, a pentagon, a circle, etc. An optional base member 40 may be disposed between the cutting blade 30 and the recess bottom surface 24 of the blade receiving recess 22. The base member 40 may be securely fixed to the blade receiving recess 22 by means of a threaded fastener 42 (such as a screw, etc.). In an alternative embodiment, the blade 30 may be disposed on the recess bottom surface 24 of the blade receiving recess 22 without using a base member 40 or a threaded fastener 42.

[0031] The cutting insert 30 may be clamped within the insert receiving pocket 22 of the tool holder 10 by means of a through coolant fixture 100. Figure 4As shown, the through-coolant fixture 100 includes a base portion 110 with a nose 150 extending outwardly from the base portion 110. The through-coolant fixture 100 can be constructed and arranged to allow coolant fluid to flow through the base portion 110, out of the nose 150 and directed toward the cutting blade 30. The coolant fixture 100 can be made of a suitable material, such as carbide, etc. For example, the carbide can be sintered tungsten carbide, such as cobalt sintered tungsten carbide.

[0032] like Figure 5 As shown, the base portion 110 may have a clamp top surface 112 and a clamp bottom surface 114 that may be parallel to each other. The nose 150 may include a nose top surface 152 that may be parallel to the clamp top surface 112. The nose top surface 152 may be coplanar with the clamp top surface 112 and extend radially outward from the clamp top surface. The nose bottom surface 154 may extend radially outward from the clamp front surface 116. The nose bottom surface 154 may extend at a certain angle relative to the nose top surface 152, so that the distance between the nose top surface 152 and the nose bottom surface 154 decreases in a direction radially outward from the base portion 110.

[0033] like Figure 5 , Figure 7 and Figure 8 As shown, the base portion 110 of the through-type coolant fixture 100 includes a fixture fixing hole 130 extending from the fixture top surface 112 to the fixture bottom surface 114 along the central longitudinal axis C. The fixture fixing hole longitudinal axis C can be substantially perpendicular to the fixture top surface 112 and the fixture bottom surface 114. The fixture fixing hole 130 can be circular in shape and constructed and arranged to receive the clamping screw 50. As described more fully below, the clamping screw 50 can be constructed and arranged to fix the through-type coolant fixture 100 to the tool holder body 12 and deliver coolant fluid into the coolant fixture 100.

[0034] like Figure 4 , Fig.10 and Fig.12 As shown, the clamping nub 120 may extend downwardly from the nose bottom surface 154. The clamping nub 120 may be constructed and arranged to be inserted into the blade hole 35 of the cutting insert 30 when the through-coolant fixture 100 secures the cutting insert 30 to the tool holder 10. The clamping nub 120 may be constructed and arranged to prevent the cutting insert 30 from leaving the blade receiving pocket 22 during operation. The clamping nub 120 may be generally triangular in shape, or may be any other suitable shape.

[0035] The clamping pad 124 may extend from the nose bottom surface and at least partially surround the periphery of the nub base 122. The clamping pad 124 may be constructed and arranged to contact the insert top surface 32 and apply a clamping force against the insert top surface 32 to secure the cutting insert 30 in the insert receiving pocket 22 of the tool holder 10.

[0036] like Figure 5 and Figures 7 to 9 As shown, the nose 150 may include a nose tip surface 156 extending from the nose top surface 152 to the nose bottom surface 154. The nose tip surface 156 may be on the radially outer end of the nose 150. The nose tip surface 156 may be angled or may be perpendicular to the nose top surface 152 and / or the nose bottom surface 154. The nose tip surface 156 may be angled so that a portion of the nose tip surface 156 adjacent to the nose bottom surface 154 extends radially outward farther than a portion of the nose tip surface 156 adjacent to the nose top surface 152. The nose tip surface 156 may be a flat surface or may be a curved surface.

[0037] like Figure 6 , Figure 7 and Fig. 9 As shown, the nose 150 may include one or more coolant nozzles 160, such as two, three, or four coolant nozzles 160 extending from the base portion 110 through the nose end surface 156. Each coolant nozzle 160 may be constructed and arranged to provide a coolant spray onto the blade top surface 32. Each coolant nozzle may be straight or tapered, such as Figure 6 and Fig. 9 The coolant nozzles 160 may extend from a nozzle inlet 164 of a fluid chamber 135 (discussed further below) adjacent the base portion 110 through the nose end surface 156 to a nozzle outlet 162. Each nozzle has a nozzle surface 166. As discussed above, the nozzle surface 166 may be tapered in shape, for example, may be conical. Thus, the cross-sectional area between the nozzle inlet 164 and the nozzle outlet 162 of each coolant nozzle 160 may decrease. The nozzle outlet diameter D at the nozzle outlet 162 may be approximately 1 / 8 of the nozzle inlet 164. ON The nozzle inlet diameter D may be smaller than the nozzle inlet 164. IN .like Figure 5 and Figure 6 As shown, a nozzle taper angle α measured in a plane parallel to the plane of the nose bottom surface 154 may be provided.

[0038] like Fig. 9 As shown, the nozzle outlet 162 may open into a recess 168 in the nose surface 156. The recess 168 may extend from the nose surface 156 toward the base portion 110. The recess 168 may extend to a recess rear wall 169, which may be perpendicular to the nozzle outlet 162. The recess 168 may be circular in shape.

[0039] like Figure 6 As shown, the coolant nozzles 160 may be separated from each other so that they are not in fluid communication with each other. The coolant nozzles 160 may include a first coolant nozzle and a second coolant nozzle. Figure 6 and Fig. 9 As shown, the first coolant nozzle may be arranged along the first nozzle axis N 1 The second coolant nozzle may extend along the second nozzle axis N 2 Extension. Figure 6 As shown, the first nozzle axis N 1 and the second nozzle axis N 2 can be slightly angled relative to each other and can lie in the same plane, e.g. Fig. 9 shown.

[0040] like Figures 1 to 3 As shown, the clamping screw 50 can be used to removably secure the through-coolant clamp 100 to the tool holder body 12. Figure 3 , Fig.13 and Fig.14 As shown, the clamping screw 50 has a central longitudinal axis S. The clamping screw 50 can be generally cylindrical in shape and include an upper screw portion 52, a lower screw portion 54, and a middle screw portion 56. The middle screw portion 56 can have a smaller diameter than the upper screw portion 52 and the lower screw portion 54. The upper screw portion 52 can have the same diameter as the lower screw portion 54, or a different diameter. Figure 3 As shown, a sealing ring 55 may be provided around the screw middle portion 56 and contained in an annular sealing seat 57 in the tool holder body 12 to prevent coolant from flowing from the screw upper portion 52 to the lower portion 54. The sealing ring 55 may be made of any suitable material, such as rubber or an elastomeric polymer.

[0041] The screw upper portion 52 may include a screw head 58 having a screw recess 59 for receiving a tool. For example, the screw recess 59 may be cross-shaped, flat-shaped, square, hexagonal, etc., for receiving a flat head screwdriver, a Phillips screwdriver, a square head screwdriver, an Allen wrench, etc. The screw upper portion 52 may have a generally smooth cylindrical surface, and the screw lower portion 54 may have a threaded outer surface. The clamping screw 50 may be made of any suitable material, such as hardened steel, etc., and may have a hardness less than that of the through-type coolant clamp 100, which may be made of carbide, etc.

[0042] The screw lower portion 54 of the clamping screw 50 may include a screw coolant opening 61 in fluid communication with the body fluid passage 13 of the tool holder body 12, and a screw axial coolant flow channel 62 extending from the screw coolant opening 61 along the clamping screw central longitudinal axis S of the clamping screw 50 to the screw upper portion 52 of the clamping screw 50. The body fluid passage 13 may be enclosed within the tool holder body 12.

[0043] The coolant axial flow passage 62 can be formed in the clamping screw 50 so that when assembled on the tool holder 10, the clamping screw axis S is substantially aligned with the clamp fixing hole axis C of the base portion 110. In addition, the coolant axial flow passage 62 can be in fluid communication with one or more screw coolant radial passages 64, which are provided with coolant through corresponding screw coolant ports 66 formed in the screw upper portion 52 of the clamping screw 50. Each screw coolant radial passage 64 can extend radially outward from the coolant flow passage 62 substantially perpendicular to the clamping screw central longitudinal axis S. However, it should be understood that each coolant radial passage 64 can be formed in a manner that is not perpendicular to the clamping screw axis S.

[0044] When fixed to the tool holder body 12, each screw coolant radial passage 64 and the corresponding port 66 are in fluid communication with the fluid chamber 135 of the base portion 110. In the illustrated embodiment, the clamping screw 50 has three coolant radial passages 64. However, there may be one, two, four, five, six or more screw coolant radial passages 64. Each screw coolant radial passage 64 may extend in a radial direction different from the other screw coolant radial passages 64, and the coolant radial passages may be equally spaced around the circumference of the screw upper portion 52. Therefore, in the three-channel embodiment shown in the figure, the coolant radial passages 64 are equally spaced at 120° intervals around the circumference of the upper portion 52.

[0045] like Figure 3 As shown, when the through coolant clamp 100 is fixed to the tool holder body 12, the clamping screw hole 130 can be aligned with the main body screw hole 80 extending from the tool holder upper surface 14 toward the tool holder lower surface 15 opposite to the tool holder upper surface 14. The main body screw hole 80 provides fluid communication between the clamping screw hole 130 and the coolant flow channel 82 of the tool holder body 12. The coolant flow channel 82 can be constructed and arranged to contain a fluid, such as cooling water or a coolant solution. During operation of the tool holder 10 by a user, the fluid in the coolant flow channel 82 can flow from the coolant flow channel 82 through the main body screw hole 80 into the clamping screw hole 130. The coolant flow channel 82 can be contained in the tool holder body 12.

[0046] like Figure 7As shown, the clamping screw hole 130 may include a screw support lip 132 that is constructed and arranged to contact the screw head 58 of the clamping screw 50. The screw support lip 132 may include a support bottom surface 133 that may be recessed in the tool holder upper surface 14. The support bottom surface may be constructed and arranged to engage with the screw head 58 of the clamping screw 50.

[0047] like Figure 8 and Fig. 9 As shown, the clamping screw hole 130 may include a fluid chamber 135 between the tool holder upper surface 14 and the tool holder lower surface 15. The fluid chamber 135 may be constructed and arranged to receive a flow of coolant fluid from the clamping screw 50 and direct the fluid to one or more coolant nozzles 160 extending through the nose 150. The fluid chamber 135 may radially surround the clamping screw hole 130. The cross-sectional area of ​​the fluid chamber 135, taken perpendicular to the clamping screw hole axis C and aligned with the screw coolant port 66, may be greater than the cross-sectional area of ​​the clamping screw hole 130.

[0048] The fluid chamber 135 may include a rear coolant passage 136 extending radially outward from the clamp screw hole 130. The rear coolant passage 136 may include a cylindrical passage portion 138. The cylindrical passage surface 138 may extend parallel to the central axis C. The cylindrical passage surface 138 may be located between a passage upper portion 139 and a passage lower portion 137. The passage upper portion 139 may be located between the cylindrical passage surface 138 and the clamp top surface 112. The passage lower portion 137 may be located between the cylindrical passage surface 138 and the clamp bottom surface 114.

[0049] The channel upper portion 139 may extend from the cylindrical channel surface 138 toward the clamp top surface 112. The channel upper portion 139 may be curved so that a portion of the channel upper portion 139 runs parallel to the clamp top surface 112 toward the clamp screw hole 130.

[0050] The channel lower portion 137 may extend from the cylindrical channel surface 138 toward the clamp bottom surface 114. The channel upper portion 139 may be curved so that a portion of the channel upper portion 139 runs toward the clamp screw hole 130 in parallel with the clamp bottom surface 114.

[0051] The surface of the rear coolant passage 136 may merge directly into the nozzle inlet 164. The fluid chamber 135 may include one or more transition passages 140 that are located at a position adjacent to the nozzle centerline N. 1 and N 2Each of the transition passages 140 may extend in substantially the same direction. Each transition passage 140 may be constructed and arranged to direct fluid flow from the rear coolant passage 136 to the nozzle inlet 164 of each coolant nozzle 160. The rear coolant passage 136 may gradually merge into the transition passage 140. The converging surface 145 may be concave or straight in shape. The converging surface 145 may be constructed and arranged so that the fluid passing over the converging surface 145 during operation of the tool holder 10 flows through the nozzle outlet 162 in a controlled manner, for example, the flow may have reduced turbulence and may be at least partially laminar. There may be no sharp edges along the converging surface 145 or between the rear coolant passage 136 and the transition passage 140.

[0052] Each transition passage 140 may include a transition outer surface 142 extending radially outward from the clamping screw hole 130 connected to the corresponding nozzle inlet 164. Figure 6 As shown, each transition outer surface 142 may be aligned with the corresponding nozzle axis N at each nozzle inlet 164. 1 and N 2 Forming transition angle A T Each transition angle A T It may be greater than 0°, for example, greater than 5°, or greater than 10°, or greater than 15°, or greater than 30°. T It may be less than 70°, for example less than 65°, or less than 60°, or less than 50°. T It may be in the range of 5° to 65°, for example 10° to 60°, or 15° to 50°, or 20° to 45°. Figure 6 The angled inflection point between each transition outer surface 142 and the nozzle surface 166 is shown in FIG. T A curved surface, such as a convex surface, a concave surface, or a composite concave / convex surface, is provided in the region.

[0053] like Figure 6 As shown, the first nozzle axis N 1 and the second nozzle axis N 2 The transition angle A may be greater than 0° but less than 1° from the nozzle inlet 164 to the nozzle outlet 162. T The taper angles (e.g., from 0.1° to 30°, or from 0.2° to 20°, or from 0.4° to 5°, or from 0.5° to 10°) taper inwardly relative to each other.

[0054] The fluid chamber 135 can be constructed and arranged to interact with each coolant nozzle 160 so that during operation of the tool holder 10, the fluid flowing out of the nozzle outlet 162 is in a reduced turbulence or substantially laminar state at a typical volume flow rate of the coolant fluid. The volume flow rate of the coolant fluid during operation can be at least 0.1 L / min, for example, at least 0.5 L / min or at least 1 L / min, or at least 5 L / min. The volume flow rate of the coolant fluid during operation can typically be at most 200 L / min, for example, at most 100 L / min, or at most 50 L / min, or at most 25 L / min. The volume flow rate of the coolant fluid during operation can typically be in the range of 0.1 L / min to 200 L / min, for example, 0.5 L / min to 100 L / min, or 1 L / min to 50 L / min, or 5 L / min to 25 L / min. It should be understood that the flow rate can vary based on the inlet coolant pressure and different designs.

[0055] The controlled flow of the coolant fluid out of each nozzle outlet 162 may be caused at least in part by the flow path in the coolant reservoir chamber 135 through each storage transition channel 140 along each transition outer surface 142 between the rear coolant channel 136 and each coolant nozzle 160. Each storage transition channel 140 may cause a gradual transition of the fluid during flow through the through-coolant clamp 100 so that the fluid does not interact with any sharp edges between the nozzle outlet 160 and the clamping screw 50. The gradual transition may be constructed and arranged to reduce turbulence of the fluid and allow for more direct pointing of the coolant fluid flow. The controlled flow may allow the coolant fluid to form a beam when leaving the nozzle outlet 162. This may allow for increased cooling of the cutting insert and more efficient use of the fluid.

[0056] When the tool holder 10 is in operation, the coolant fluid can flow from the tool holder body 12 through the clamping screw 50, then through the through-coolant fixture 100, and out toward the cutting insert 30. The fluid can flow from a conventional fluid source (not shown) into the tool holder body 12 through the body fluid passage 13. The fluid can then flow from the body fluid passage 13 through the screw coolant opening 61 into the screw coolant flow passage 62 of the clamping screw 50. The fluid can flow through the screw coolant flow passage 62 into one or more screw coolant passages 64 of the clamping screw 50. The fluid can then flow through the screw coolant passage 164 to the screw coolant port 66 and into the coolant reservoir 135. A portion of the fluid can contact an outer surface of the coolant reservoir 135, such as a channel lower surface 137, a channel cylindrical surface 138, or a channel upper surface 139. The coolant reservoir 135 can direct the fluid flow to one or more coolant nozzles 160. The fluid flow may flow from the rear coolant passage 136 of the coolant reservoir 135 to the transition passage 140 and flow along the outer surface of the transition passage. The fluid flow may then flow from the transition passage 140 into one or more coolant nozzles 160. The fluid flow may then pass through the coolant nozzle 160 and out of the nozzle outlet 162. The fluid flow may exit the nozzle outlet 162 in a controlled manner that reduces turbulence. The fluid flow may be directed to the cutting blade 30.

[0057] Figures 15 to 17 A through coolant clamp 200 according to another embodiment of the present invention is illustrated. The through coolant clamp 200 includes a nose 250 having a nose top surface 252 that forms a protective raised lip 258 that can help protect the clamping screw head from chip washout during operation.

[0058] Figures 18 to 20 A through coolant clamp 300 according to another embodiment of the present invention is illustrated. The through coolant clamp 300 includes a nose 350 having a nose top surface 352 that forms a protective raised lip 358 that can help protect the clamping screw head from chip washout during operation. The nose top surface 352 includes a pattern of multiple ridges 353 that help direct chips to either side away from the clamping screw as they slide off the nose 350 and / or keep coolant in the recesses or grooves between the ridges 353.

[0059] As used herein, the terms "including", "containing", etc., in the context of this application, shall be understood to be synonymous with "comprising", and are therefore open-ended and do not exclude the presence of additional undescribed or unlisted elements, materials, phases, or method steps. As used herein, "consisting of" in the context of this application shall be understood to exclude the presence of any unspecified elements, materials, phases, or method steps. As used herein, "consisting essentially of" in the context of this application shall be understood to include the specified elements, materials, phases, or method steps (if applicable), and also include any unspecified elements, materials, phases, or method steps that do not materially affect the basic or novel characteristics of the invention.

[0060] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values ​​set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard variations found in their respective testing measurements.

[0061] Likewise, it should be understood that any numerical range recited herein is intended to include all sub-ranges contained therein. For example, a range of "1 to 10" is intended to include all sub-ranges between (and including) the stated minimum value of 1 and the stated maximum value of 10, i.e., having a minimum value equal to or greater than 1 and a maximum value equal to or less than 10.

[0062] In this application, unless specifically stated otherwise, the use of the singular includes the plural and the plural includes the singular. In addition, in this application, the use of "or" means "and / or" unless explicitly stated otherwise, even though "and / or" may be explicitly used in certain circumstances. In this application and the appended claims, the articles "a", "an", and "the" include plural referents unless explicitly and obviously limited to one referent.

[0063] While specific embodiments of the present invention have been described above for purposes of illustration, it will be apparent to those skilled in the art that numerous changes in the details of the invention may be made without departing from the invention as defined in the appended claims.

Claims

1. A tool holder assembly comprising: a tool holder body; a cutting insert mounted on the tool holder body; a through-coolant clamp mounted on the tool holder body, the through-coolant clamp being constructed and arranged to secure the cutting insert to the tool holder body and to provide coolant fluid to the cutting insert, and the through-coolant clamp including a clamping screw bore having a longitudinal axis; as well as a clamping screw extending through the clamping screw bore to secure the coolant fixture to the tool holder body, and the clamping screw including an internal axial coolant fluid flow passage, wherein the pass-through coolant fixture comprises: Base part; a coolant fluid reservoir chamber within the base portion, the coolant fluid reservoir chamber extending radially rearwardly from the clamping screw bore around at least a portion of the clamping screw and in fluid communication with the internal axial coolant fluid flow passage of the clamping screw; a nose portion extending radially forwardly from the base portion; and at least one nozzle in the nose, the at least one nozzle extending along a nozzle axis, wherein the at least one nozzle comprises: a nozzle inlet in fluid communication with the coolant fluid storage chamber; a nozzle outlet, the nozzle outlet being opposite the nozzle inlet; and a nozzle coolant passage extending along a nozzle coolant passage axis between the nozzle inlet and the nozzle outlet; and a transition outer surface in fluid communication between the coolant fluid reservoir and the nozzle inlet of the at least one nozzle to form a smooth transition between the coolant fluid reservoir and the nozzle inlet, such that a transition angle between at least a portion of the transition surface and the nozzle coolant channel axis measured in a plane perpendicular to the longitudinal axis of the through-type coolant fixture is less than 60°.

2. The tool holder assembly of claim 1, wherein the transition angle is 15° to 50°.

3. The tool holder assembly of claim 1, wherein the transition outer surface includes a straight portion.

4. The tool holder assembly of claim 1, wherein the coolant fluid reservoir surrounds an upper portion of the clamping screw.

5. The tool holder assembly of claim 1 , wherein the nozzle coolant passage comprises a smooth cone, and a cross-sectional area of ​​the nozzle inlet taken perpendicularly to the axis of the nozzle coolant passage is greater than a cross-sectional area of ​​the nozzle outlet taken perpendicularly to the axis of the nozzle coolant passage.

6. The tool holder assembly of claim 1, wherein the at least one nozzle comprises a first coolant nozzle and a second separate coolant nozzle.

7. The tool holder assembly of claim 1, wherein the coolant fixture is constructed and arranged to reduce turbulence of the coolant fluid at a volume flow rate of at least 1 L / min.

8. The tool holder assembly of claim 1, wherein the clamping screw comprises: Threaded lower part; a head, the head being located at an end of the clamping screw opposite the threaded lower portion; an upper portion, the upper portion being located between the threaded lower portion and the head; an internal coolant axial flow passage having an inlet opening adjacent the threaded lower portion and extending to the upper portion; as well as At least one coolant radial passage is in fluid communication with the coolant axial flow passage, the at least one coolant radial passage having a radial outlet opening through an outer surface of the upper portion.

9. The tool holder assembly of claim 8, including at least two of said coolant radial passages, said at least two coolant radial passages being constructed and arranged to discharge said coolant fluid into said coolant fluid reservoir.

10. The tool holder assembly of claim 1, wherein the through-coolant fixture comprises carbide.

11. A through coolant fixture for providing coolant fluid to a cutting insert, comprising: Base part; a coolant fluid reservoir chamber within the base portion, the coolant fluid reservoir chamber extending radially rearwardly from a clamp screw hole extending from a clamp top surface of the pass-through coolant clamp to a clamp bottom surface of the pass-through coolant clamp; a nose portion extending radially forwardly from the base portion; as well as at least one nozzle in the nose, the at least one nozzle extending along a nozzle axis, wherein each of the at least one nozzle comprises: a nozzle inlet in fluid communication with the coolant fluid storage chamber; a nozzle outlet, the nozzle outlet being opposite the nozzle inlet; and a nozzle coolant passage extending along a nozzle coolant passage axis between the nozzle inlet and the nozzle outlet; and a transition outer surface in fluid communication between the coolant fluid reservoir and the nozzle inlet of the at least one nozzle to form a smooth transition between the coolant fluid reservoir and the nozzle inlet, such that a transition angle between at least a portion of the transition surface and the nozzle coolant channel axis measured in a plane perpendicular to the longitudinal axis of the through-type coolant fixture is less than 60°.

12. The through-type coolant fixture of claim 11, wherein the transition angle is 15° to 50°.

13. The coolant feed-through fixture of claim 11, wherein the transition outer surface includes a straight portion.

14. The pass-through coolant clamp of claim 11, wherein the coolant fluid reservoir partially surrounds an upper portion of the clamping screw hole.

15. The through-type coolant fixture of claim 11, wherein the nozzle coolant passage comprises a smooth cone, and a cross-sectional area of ​​the nozzle inlet taken perpendicularly to the nozzle coolant passage axis is greater than a cross-sectional area of ​​the nozzle outlet taken perpendicularly to the nozzle coolant passage axis.

16. The pass-through coolant fixture of claim 11, wherein the at least one nozzle comprises a first coolant nozzle and a second separate coolant nozzle.

17. The through-coolant fixture of claim 11, wherein the through-coolant fixture is constructed and arranged to reduce turbulence of the coolant fluid at a volume flow rate of at least 1 L / min.

18. The through-coolant fixture of claim 11, wherein the through-coolant fixture comprises carbide.

19. The coolant feedthrough clamp of claim 11, further comprising a clamping screw engaged with the clamping screw hole, wherein the clamping screw comprises: Threaded lower part; a head, the head being located at an end of the clamping screw opposite the threaded lower portion; an upper portion, the upper portion being located between the threaded lower portion and the head; an internal coolant axial flow passage having an inlet opening adjacent the threaded lower portion and extending to the upper portion; as well as At least one coolant radial passage is in fluid communication with the coolant axial flow passage, the at least one coolant radial passage having a radial outlet opening through an outer surface of the upper portion.

20. The pass-through coolant fixture of claim 19, comprising at least two of the coolant radial passages, the at least two coolant radial passages being constructed and arranged to discharge the coolant fluid into the coolant fluid reservoir.

21. A clamping screw for a through-coolant tool holder clamping assembly, the clamping screw comprising: Threaded lower part; a head, the head being located at an end of the clamping screw opposite the threaded lower portion; an upper portion, the upper portion being located between the threaded lower portion and the head; an internal coolant axial flow passage having an inlet opening adjacent the threaded lower portion and extending to the upper portion; as well as At least one coolant radial passage is in fluid communication with the coolant axial flow passage and has a radial outlet opening through an outer surface of the upper portion.

22. The clamping screw of claim 21 including at least two of said coolant radial passages constructed and arranged to discharge said coolant radially outwardly from said upper portion.

23. The clamping screw of claim 22, including three of said coolant radial passages, said three coolant radial passages being equally spaced about the circumference of said upper portion.

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