Ball head blade with cooling channel
By introducing anti-clogging components into the cooling channel of the ball end mill, and using components such as pressurized pipes and filter cartridges to prevent debris blockage, effective cooling of the ball end mill is achieved, solving the problem of temperature rise caused by debris blockage and extending the service life of the mill mill.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUANGHUAI UNIV
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-10
AI Technical Summary
When existing ball end mills are internally cooled, debris can easily clog the cooling channels, preventing coolant from reaching the cutting tip in time, causing the cutting tool temperature to rise rapidly and shortening its service life.
A cooling channel with anti-clogging components was designed, including an anti-clogging mesh, a pressurizing pipe, a filter cartridge, and an elastic sheet. The dual pressurization of the micro air pump and the pressurizing pipe prevents debris from clogging the channel and ensures that the cutting fluid acts on the outside of the cutting tool in a timely manner.
It effectively prevents debris from clogging the blade, ensures that the coolant cools the blade in time, reduces wear, and extends the blade's service life.
Smart Images
Figure CN224101907U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ball nose blade cooling technical field especially a kind of ball nose blade with cooling channel. BACKGROUND
[0002] Ball nose blade is a kind of milling cutter with hemispherical end, mainly used for 3D curved surface processing, die cavity milling and complex profile engraving, etc., its ball head design can form smooth transition when processing, reduce step effect, suitable for finish machining and semi-finish machining.
[0003] Currently, ball nose blade cuts workpiece, tool and workpiece material rub fiercely, and a large amount of heat will be generated by metal plastic deformation, if not cooling tool in time will lead to tool softening and accelerate tool wear, greatly shorten the service life of ball nose blade, increase workpiece processing cost, the main heat dissipation of ball nose tool in prior art is divided into two ways, external cooling and internal cooling, external cooling is that cutting fluid is sprayed to cutting area from outside by machine tool nozzle, its structure is simple, suitable for most standard ball nose tools, while internal cooling is that cutting fluid reaches tool tip through cooling channel inside tool, improves cooling efficiency, suitable for deep cavity processing, however, when ball nose blade cools tool tip by internal cooling mode, liquid outlet hole needs to be arranged on the outer wall of tool tip, so that cutting fluid enters liquid outlet hole through cooling channel and acts directly on the outside of tool tip, however, when workpiece is machined by ball nose blade, a large amount of chips will be generated, part of the chips with diameter smaller than that of liquid outlet hole will enter the inside of cooling channel through liquid outlet hole, causing cooling channel to be blocked, or a large amount of chips are gathered in the inner cavity of liquid outlet hole, causing liquid outlet hole to be blocked, so that cutting fluid cannot reach cutting area, the temperature of ball nose blade rises rapidly, causing ball nose blade to soften, accelerating the wear of ball nose blade, greatly shortening the service life of ball nose blade. SUMMARY
[0004] In order to make up for the above shortcomings, the utility model provides a ball nose blade with cooling channel, aiming at improving the problems in prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a ball nose blade with cooling channel, comprising:
[0006] Ball head rod, top detachable installation has ball nose blade, the bottom of ball head rod is provided with and communicates with the top of liquid delivery hole, the bottom of ball nose blade is provided with and the transmission pipe of liquid delivery hole is adapted, and the inside of ball nose blade is provided with and the transmission pipe is communicated with the liquid delivery channel of liquid delivery hole, the outer wall of ball nose blade is provided with a plurality of and the liquid delivery channel inner cavity is communicated with the liquid injection hole of liquid delivery channel;
[0007] The anti-blocking piece is arranged in the inner cavity of the liquid injection hole, and is used for preventing the debris generated in the workpiece machining from blocking the liquid injection channel and the liquid injection hole, so that the cooling liquid can timely act on the outer part of the ball head blade.
[0008] As a further description of the above technical solution:
[0009] The anti-blocking piece comprises an anti-blocking net, and the inner wall of each of the plurality of liquid injection holes is fixedly installed with the anti-blocking net and a pressurizing pipe.
[0010] As a further description of the above technical solution:
[0011] The pressurizing pipe is in a circular truncated cone structure, and the large end of the pressurizing pipe is fixedly connected with the inner wall of the liquid injection hole, and the small end of the pressurizing pipe points to the anti-blocking net.
[0012] As a further description of the above technical solution:
[0013] The top of the anti-blocking net is provided with a through hole in communication with the bottom, and a filter cylinder is slidably installed in the inner cavity of the through hole, one end of the filter cylinder is fixedly installed with a sliding rod, the inner wall of the pressurizing pipe is fixedly installed with an elastic sheet, and the other end of the sliding rod is fixedly connected with one end of the elastic sheet.
[0014] As a further description of the above technical solution:
[0015] The end of the filter cylinder away from the sliding rod is in a hemispherical structure.
[0016] As a further description of the above technical solution:
[0017] The outer wall of the ball head blade is provided with an aggregation groove in communication with the inner cavity of the liquid injection hole.
[0018] The utility model has the advantages of the following:
[0019] In the utility model, the anti-blocking piece can prevent the debris generated in the workpiece machining from blocking the liquid injection channel and the liquid injection hole, so that the cooling liquid can timely act on the outer part of the ball head blade, the temperature of the ball head blade does not rapidly rise during the workpiece machining, the softening of the ball head blade is prevented, the wear degree of the ball head blade is reduced, and the service life of the ball head blade is prolonged. DRAWINGS
[0020] Figure 1 It is a perspective view of the utility model;
[0021] Figure 2 It is an assembly view of the ball head blade and the anti-blocking net of the utility model;
[0022] Figure 3 It is an assembly view of the filter cylinder and the elastic sheet of the utility model;
[0023] Figure 4 The utility model discloses Figure 2 The structure enlarged view of A in the middle.
[0024] Legend:
[0025] 1, ball head rod, 2, ball head blade, 3, transmission pipe, 4, infusion channel, 5, filter cartridge, 6, sliding rod, 7, elastic sheet, 8, gathering groove, 9, liquid injection hole, 10, anti-blocking net, 11, pressurizing pipe. Specific implementation
[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0027] Referring to Figures 1-4 , the utility model provides an embodiment: a ball head blade with cooling channel, comprising:
[0028] Ball head rod 1, detachable installation has ball head blade 2 at top, wherein the top of ball head rod 1 and the outer wall of ball head blade 2 are connected by screw (as shown in Figure 1 ), ball head blade 2 can be replaced in time by screw cooperation, so as to process workpiece of different processing requirements by replacing different types of ball head blade 2 (this is prior art, and no more detailed description is made here).
[0029] The bottom of ball head rod 1 is provided with infusion hole communicated with the top, the bottom of ball head blade 2 is provided with transmission pipe 3 matched with the infusion hole, and the inside of ball head blade 2 is provided with infusion channel 4 communicated with transmission pipe 3, the outer wall of ball head blade 2 is provided with multiple liquid injection holes 9 communicated with the inner cavity of infusion channel 4, when the top of ball head rod 1 is connected with ball head blade 2 by screw, one end of transmission pipe 3 away from ball head blade 2 is inserted into the inner cavity of infusion hole, when processing workpiece, one end of ball head rod 1 away from ball head blade 2 is connected with processing equipment, at this time, the infusion pipe in the inside of processing equipment is inserted into infusion hole (this is prior art), so that cutting fluid is transmitted to the inner cavity of infusion hole, the cutting fluid enters the inner cavities of transmission pipe 3 and infusion channel 4 through infusion hole, the cutting fluid in the inner cavity of infusion channel 4 flows out through multiple liquid injection holes 9, so that the cutting fluid is sprayed on the outer wall of ball head blade 2, which can realize the rapid cooling of ball head blade 2, so as to cool ball head blade 2 in time when deep cavity processing of workpiece is carried out by ball milling cutter (this is prior art, and no more detailed description is made here).
[0030] The inner wall of the plurality of liquid injection holes 9 is fixedly installed with a blocking prevention net 10 and a pressurizing pipe 11, and the blocking prevention net 10 is located between the liquid injection hole 9 and the pressurizing pipe 11. When the workpiece is machined by the ball-end blade 2, part of the chips (the chips with a size smaller than the diameter of the liquid injection hole 9) generated in the machining of the workpiece enter the inner cavity of the liquid injection hole 9 through the liquid outlet of the liquid injection hole 9 and are accumulated between the blocking prevention net 10 and the liquid outlet of the liquid injection hole 9, thereby preventing the chips generated in the machining of the workpiece from entering the inner cavity of the liquid delivery channel 4 and causing the liquid delivery channel 4 to be blocked, so that the cutting fluid can smoothly enter the inside of the liquid injection hole 9 through the liquid delivery channel 4.
[0031] The pressurizing pipe 11 is provided in a circular truncated cone structure, the large end of the pressurizing pipe 11 is fixedly connected with the inner wall of the liquid injection hole 9, and the small end of the pressurizing pipe 11 points to the blocking prevention net 10. Before the cutting fluid enters the inner cavity of the liquid injection hole 9 through the liquid delivery channel 4, the cutting fluid first enters the inner cavity of the pressurizing pipe 11, flows into the pressurizing pipe 11 through the large end and continuously flows to the small end. Since the internal passage of the pressurizing pipe 11 is continuously reduced, the cutting fluid is extruded. When the cutting fluid is sprayed out through the small end of the pressurizing pipe 11, a “water column” structure is formed, thereby pressurizing the sprayed cutting fluid and accelerating the spraying of the cutting fluid to the blocking prevention net 10, so as to impact the chips accumulated on the top of the blocking prevention net 10, so that the accumulated chips can flow with the cutting fluid, thereby providing a flow channel for the cutting fluid, so that the cutting fluid can act on the outside of the ball-end blade 2 in time, thereby cooling the ball-end blade 2, preventing the temperature of the ball-end blade 2 from rapidly rising during the machining of the workpiece and causing the ball-end blade 2 to soften, reducing the wear degree of the ball-end blade 2 and prolonging the service life of the ball-end blade 2.
[0032] According to the understanding of the applicant to the prior art, when the cutting fluid is pressurized by the pressurizing pipe 11, the pressurizing capacity of the pressurizing pipe 11 for the cutting fluid is limited due to the low flow rate of the cutting fluid and the limited length of the pressurizing pipe 11, so that the pressurized cutting fluid cannot strongly impact the accumulated chips. When the top of the blocking prevention net 10 is accumulated with a large amount of chips, the pressurized cutting fluid cannot flush away the accumulated chips. Due to the blockage of the chips to the cutting fluid, the flow rate of the cutting fluid is reduced, so that the cutting fluid cannot act on the outer wall of the ball-end blade 2 in time, thereby causing the ball-end blade 2 to be unable to be quickly cooled by the cutting fluid and still being prone to softening.
[0033] In order to solve the above problems, the top of the anti-blocking net 10 is provided with a through hole communicated with the bottom, a filter cylinder 5 is slidably installed in the inner cavity of the through hole, one end of the filter cylinder 5 is fixedly installed with a sliding rod 6, the inner wall of the pressurizing pipe 11 is fixedly installed with an elastic sheet 7, the other end of the sliding rod 6 is fixedly connected with one end of the elastic sheet 7, and in order to accelerate the flow rate of the cutting fluid in the infusion channel 4, a micro air pump is installed in the machining equipment, the air outlet end of the micro air pump is connected with the infusion pipe, the micro air pump is started when the cutting fluid enters the infusion channel 4 through the infusion pipe, the infusion channel 4 is pressurized through the micro air pump, so that the flow rate of the cutting fluid in the infusion channel 4 is improved (this is the prior art), the cutting fluid entering the infusion channel 4 is first pressurized by the micro air pump, and then is secondarily pressurized by the pressurizing pipe 11, the cutting fluid pressurized twice is sprayed to the elastic sheet 7 in the form of a water column through the small end of the pressurizing pipe 11, at this time, the elastic sheet 7 is deformed under the impact of the cutting fluid, at this time, the sliding rod 6 connected with one end of the elastic sheet 7 moves to the liquid outlet end close to the liquid injection hole 9, at this time, the filter cylinder 5 moves together with the sliding rod 6, so that the accumulated debris on the top of the anti-blocking net 10 is pushed away by the filter cylinder 5, so that the accumulated debris moves to the edge of the liquid injection hole 9 and the outer wall of the ball head blade 2, at this time, the cutting fluid flows to the outside of the liquid injection hole 9 through the filter cylinder 5, so that the cutting fluid can act on the outer wall of the ball head blade 2 in time and quickly, the outer wall of the ball head blade 2 is quickly cooled, the softening of the ball head blade 2 is avoided, and the service life of the ball head blade 2 is further prolonged.
[0034] Wherein, when the end of the filter cylinder 5 away from the sliding rod 6 is in the initial position (before the elastic sheet 7 is impacted by the cutting fluid), the end of the filter cylinder 5 away from the sliding rod 6 is flush with the top of the anti-blocking net 10, and when the maximum distance that the sliding rod 6 can move is less than the straight line distance between the end of the filter cylinder 5 away from the sliding rod 6 and the liquid outlet end of the liquid injection hole 9, the end of the filter cylinder 5 away from the sliding rod 6 is prevented from moving out of the outside of the liquid injection hole 9 and affecting the normal machining of the ball head blade 2.
[0035] Further, the elastic sheet 7 is made of stainless steel material, and the elastic potential energy of the elastic sheet 7 is stored after the elastic sheet 7 is deformed under the impact of the cutting fluid, and the elastic sheet 7 converts the elastic potential energy into the kinetic energy of reset after the cutting fluid stops impacting the elastic sheet 7, which is beneficial to the reset of the filter cylinder 5, so that the filter cylinder 5 can move back and forth by the intermittent pressurization of the infusion channel 4 by the micro air pump, so that the filter cylinder 5 can continuously push away the debris accumulated on the top of the anti-blocking net 10, prevent the outer wall of the filter cylinder 5 from being blocked by the debris, and allow the cutting fluid to continuously pass through the filter cylinder 5 to act on the outer wall of the ball head blade 2.
[0036] The filter cylinder 5 and the anti-blocking net 10 have the same pore size, and the linear distance between the outer wall of the filter cylinder 5 and the inner wall of the through hole is not greater than 0.01 mm, so that the debris is prevented from entering the inner cavity of the liquid delivery channel 4 through the filter cylinder 5 and the space between the outer wall of the filter cylinder 5 and the inner wall of the through hole.
[0037] The elastic sheet 7 is made of stainless steel, so that the elastic sheet 7 is not easy to deform when heated, and the service life of the elastic sheet 7 is prolonged.
[0038] The end of the filter cylinder 5 away from the slide rod 6 is provided with a hemispherical structure, and the outer wall of the ball nose blade 2 is provided with an accumulation groove 8 in communication with the inner cavity of the liquid injection hole 9, so that when the filter cylinder 5 pushes away the debris accumulated on the top of the anti-blocking net 10, the debris accumulated on the end of the filter cylinder 5 away from the slide rod 6 slides along the top of the filter cylinder 5 and falls into the inner cavity of the accumulation groove 8, so as to collect the debris, and the accumulation groove 8 can also guide the flow direction of the cutting fluid, increase the contact area between the cutting fluid and the outer wall of the ball nose blade 2, and further accelerate the cooling rate of the ball nose blade 2.
[0039] The anti-blocking net 10, the elastic sheet 7, the filter cylinder 5 and the slide rod 6 constitute an anti-blocking member, which can prevent the debris generated during the machining of the workpiece from blocking the liquid delivery channel 4 and the liquid injection hole 9, so that the cooling liquid can act on the outside of the ball nose blade 2 in time, the temperature of the ball nose blade 2 is prevented from rising rapidly during the machining of the workpiece, the wear degree of the ball nose blade 2 is reduced, and the service life of the ball nose blade 2 is prolonged.
[0040] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.
Claims
1. A ball nose end mill with a cooling channel, characterized by: The utility model provides a kind of ball head bar (1), detachable top installation ball head blade (2), the bottom of the ball head bar (1) is equipped with and top communication infusion hole, the bottom of the ball head blade (2) is equipped with and infusion hole compatible transmission pipe (3), and the inside of ball head blade (2) is equipped with and transmission pipe (3) communication infusion channel (4), the outer wall of ball head blade (2) is equipped with multiple and infusion channel (4) inner cavity communication liquid injection hole (9); Anti-blocking piece is arranged in the inner cavity of liquid injection hole (9), and the anti-blocking piece is used to prevent the debris generated by workpiece machining from blocking infusion channel (4) and liquid injection hole (9), so that the cooling liquid can act on the outside of ball head blade (2) in time. The anti-blocking piece includes anti-blocking net (10), the inner wall of multiple liquid injection holes (9) is fixedly installed with anti-blocking net (10) and pressurizing pipe (11), and the anti-blocking net (10) is located between liquid injection hole (9) and pressurizing pipe (11).
2. A ball nose end mill with cooling channels as defined in claim 1, wherein: The pressurizing pipe (11) is arranged in a circular truncated cone structure, and the large end of the pressurizing pipe (11) is fixedly connected with the inner wall of the liquid injection hole (9), and the small end of the pressurizing pipe (11) points to the anti-blocking net (10).
3. A ball nose end mill with cooling channels as defined in claim 2, wherein: The top of the anti-blocking net (10) is provided with a through hole communicating with the bottom, the inner cavity of the through hole is slidably installed with a filter cartridge (5), one end of the filter cartridge (5) is fixedly installed with a sliding rod (6), the inner wall of the pressurizing pipe (11) is fixedly installed with an elastic sheet (7), and the other end of the sliding rod (6) is fixedly connected with one end of the elastic sheet (7).
4. A ball nose insert with cooling channels as defined in claim 3, characterized in that: The end of the filter cartridge (5) away from the sliding rod (6) is arranged in a hemispherical structure.
5. A ball nose insert with cooling channels as defined in claim 4, characterized in that: The outer wall of the ball head blade (2) is provided with an accumulation groove (8) communicating with the inner cavity of the liquid injection hole (9).
6. The ball nose end mill with cooling channels of claim 2, wherein: