CN114888318A

CN114888318A - Tool body and forming method of inner cooling channel of tool

Info

Publication number: CN114888318A
Application number: CN202210614734.3A
Authority: CN
Inventors: 贾旭钢; 董志豪; 孙永
Original assignee: SF Diamond Co Ltd
Current assignee: SF Diamond Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-08-12

Abstract

The invention relates to cooling of a cutter, in particular to an arrangement structure of an inner cooling channel of the cutter, and provides a cutter body and a forming method of the inner cooling channel of the cutter. The tool body comprises a main body part and an inner cooling flow guide module fixed outside the main body part, one end of the main body part is provided with a tool handle, the other end of the main body part is provided with a tool bit seat, and the inner cooling flow guide module is provided with a cooling liquid inlet and a flow guide pipe; the flow guide pipe extends to the corresponding tool bit seat, the extending path is used for avoiding interference with the workpiece and the machine tool, and the end opening of the flow guide pipe forms a nozzle. The forming method of the inner cooling channel of the cutter comprises the following steps: and the inner cooling flow guide module provided with a cooling liquid inlet and a flow guide pipe is fixedly connected to the outer part of the main body part of the cutter, so that the flow guide pipe extends to the corresponding cutter head seat along an extending path for avoiding interference with a workpiece and a machine tool to spray cooling liquid towards the cutter head, thereby forming an inner cooling channel for guiding the cooling liquid to the cutter head seat. The invention can solve the problem that the existing cutters are difficult to process inner cooling channels.

Description

Tool body and forming method of inner cooling channel of tool

Technical Field

The invention relates to cooling of a tool, in particular to arrangement of a cooling channel in the tool.

Background

In the metal cutting process, the cooling liquid is accurately sprayed to a cutting area to rapidly cool the cutter and the workpiece, so that the cutting chips are broken and removed, the processing quality of the workpiece is improved, the service life of the cutter is prolonged, and the processing efficiency is improved. One coolant supply form in the prior art is to use a machine tool cooling tube, which is generally a bamboo joint tube made of plastic or metal or a metal cooling tube with adjustable direction, and can be adjusted universally so that the nozzle of the tube end faces the tool. During machining, the machine tool cooling pipe translates along with the translating and rotating tool, or the machine tool cooling pipe is fixedly arranged and the nozzle faces the tool which only rotates but does not move; the other cooling liquid supply mode is inner cooling, and an inner cooling channel, namely an inner cooling liquid channel, is arranged inside the cutter and directly sprays the cooling liquid to the blade. Compared with a machine tool cooling pipe, the internal cooling mode can avoid the machine tool cooling pipe from interfering with a workpiece or a machine tool, and can still accurately supply cooling liquid to a cutting area at an ideal angle and direction when the cutter rotates, so that the effect is better, and the application is more and more extensive.

The inner cooling channel is usually formed by an electric spark puncher or a twist drill in the tool body, and generally comprises a longitudinal main channel and a lateral inclined channel crossed with the longitudinal main channel. The three-order five-blade machine-clamped tool shown in fig. 1 is a non-standard tool, and comprises a tool body 91 and five blades 92, wherein the tool body 91 comprises a main body part 93, one end of the main body part 93 is provided with a tool shank 94, the other end of the main body part 93 is provided with a tool head seat 95, and a machine tool spindle is connected with the tool through the tool shank 94. During machining, coolant 96 is injected under high pressure through the machine spindle into a central longitudinal main passage 97 in the main body 93 and through lateral inclined passages 98 toward the cutting area of each tool bit. Further, as disclosed in patent document CN209681247U, a brazed cemented carbide drill, reamer, and chamfer type inner-cooling composite tool is provided, in which a cooling liquid is sprayed to a blade portion for realizing different functions of drilling, reaming, chamfering, and the like through an inner-cooling hole and a radial water outlet hole. However, in order to meet the requirement of the machining process of the inner cooling channel, sometimes redundant process holes need to be machined by an electric spark puncher or a twist drill first, and the process holes need to be plugged by a metal repairing agent subsequently to ensure the flow direction of cooling liquid, so that the machining process is complex and the cost is high; in addition, the arrangement of the inner cooling channel may affect the mechanical properties of the tool body, and further affect the machining precision and the service life, and for a tool with a high precision requirement, the influence of the inner cooling channel on the machining precision needs to be considered.

Patent document CN105710400B discloses a tool holder for a cutting insert and a method for manufacturing the same, wherein the tool holder includes a holder portion as a tool body, a front end of the holder portion is provided with a recess in which the cutting insert is fitted, a top portion of the holder portion is provided with a clamping arm (i.e., a clamping element channel in the above-mentioned patent document), a root portion of the clamping arm is attached to the holder portion, and a front end corresponding to the cutting insert is capable of pressing the cutting insert under the action of a screw. In order to cool the cutting edge, a main internal cooling channel is arranged in the support part, a plurality of side channels are arranged in the clamping arm, and outlets of the side channels face the cutting edge. Due to the geometrical limitations of the clamping arms, it is difficult for the tool holder to machine the inner cooling channels without compromising the structural performance of the tool holder, and therefore the holder body and/or the clamping element preferably comprise metal particles fused to each other, formed in a additive manufacturing manner using a 3D rapid prototyping process (i.e. 3D metal printing technology), enabling the production of inner cooling channels with complex contours.

The 3D metal printing technology can realize higher design freedom degree and has the advantages of environmental friendliness and the like, and is rapidly developed at present. However, 3D metal printing technology also has certain limitations due to the influence and constraints of technical equipment, new materials, quality safety. For example, the liquid metal printing technology can only select metal with low melting point and strong fluidity; fused Deposition Modeling (FDM) printing technology is difficult to construct parts with complex shapes and thin-wall characteristics; the Selective Laser Sintering (SLS) technique has low tensile strength and poor dimensional accuracy. The Printing precision and mechanical properties of Selective Laser Melting (SLM) and inkjet sticky powder Printing (3 DP) are both to be improved. The cutting tool must have certain high-temperature hardness and wear resistance, necessary bending strength and impact toughness, and the requirements on dimensional accuracy and form and position tolerance are strict, so that although the inner cooling channel is easy to form by a 3D metal printing technology, the inner cooling channel still influences the mechanical property of the tool and the part processing accuracy, and the tool with high requirements on processing accuracy and mechanical property is still difficult to form by a 3D metal printing technology.

Disclosure of Invention

The invention aims to provide a method for forming an inner cooling channel of a cutter, which solves the problem that some cutters in the prior art are difficult to machine the inner cooling channel. Another object of the present invention is to provide a tool body that solves the problem of the prior art tool body that it is sometimes difficult to provide an internal cooling channel.

The invention adopts the following technical scheme:

a tool body comprises a main body part, wherein one end of the main body part is provided with a tool handle used for clamping and fixing the tool handle on a machine tool, the other end of the main body part is provided with at least one tool bit seat, the tool bit seat is used for installing a tool bit to form a cutting edge, the tool body further comprises an inner cooling flow guide module fixed outside the main body part, the inner cooling flow guide module is provided with a cooling liquid inlet, and a flow guide pipe communicated with the cooling liquid inlet is further arranged; the flow guide pipe extends to the corresponding tool bit seat, the extending path is used for avoiding interference with the workpiece and the machine tool, and the end opening of the flow guide pipe forms a nozzle used for spraying cooling liquid towards the cutting area of the tool bit.

The technical scheme has the advantages that by the arrangement of the internal cooling diversion module, cooling liquid can be injected into the internal cooling diversion module through the cooling liquid inlet on the internal cooling diversion module and then sprayed towards the cutting area of the tool bit through the diversion pipe extending to the corresponding tool bit seat, the internal cooling diversion module is fixed on the main body part and can move along with the main body part, and meanwhile, the extension path of the diversion pipe can avoid the diversion pipe from interfering with a workpiece and a machine tool, so that the internal cooling diversion module can play a role in guiding the cooling liquid like an internal cooling channel arranged in the main body part; and the inner cooling diversion module is fixed outside the main body part, compared with the inner cooling channel arranged inside the main body part, the mechanical property of the main body part cannot be influenced, the limitation of factors such as the number and the position of tool bits on the main body part is avoided, the arrangement position is more flexible, and the problem that some tools in the prior art are difficult to process the inner cooling channel is solved.

Further: the honeycomb duct comprises an extension part extending to the tool bit seat and a bending part arranged in an L shape with the extension part to face the front tool face of the tool, and the nozzle is arranged at the tail end of the bending part.

The technical scheme further limited has the advantages that the extension part can enable the flow guide pipe to extend to the cutter head seat, in addition, the nozzle of the flow guide pipe can face to the front cutter face of the cutter through the bending part which is arranged in an L shape with the extension part, and therefore the effect of the cooling liquid is better played.

Further: the inner cooling flow guide module comprises a module base body fixed on the main body part, and the flow guide pipe is connected to the module base body; the extension part comprises an inclined part connected with the module base body and a straight part connected between the inclined part and the bent part, and the inclined part and the bent part are positioned on the same radial side of the straight part and are used for enabling the flow guide pipe to avoid objects on the extension path and to face the front tool face from the side direction of the front tool face.

The above-mentioned technical scheme's that further prescribes a limit to beneficial effect is, the setting lies in straight partial radial slope part with one side and straight partial can avoid honeycomb duct and work piece and lathe to produce the interference to can reduce buckling of honeycomb duct, avoid influencing the pressure of coolant liquid because buckle.

Further: the inner cooling flow guide module is grafted on the main body part which is machined in a 3D metal printing mode.

The above-mentioned technical scheme's that further prescribes a limit to beneficial effect is, the shaping requirement of complicated shape can be satisfied comparatively easily to the mode that 3D metal printed, compares in utilizing electric spark puncher to process interior cold passageway or through the cold passageway in the fluted drill processing, and shaping process is simpler, can solve the difficult problem that satisfies the extension route requirement of honeycomb duct of other setting modes.

Further: the honeycomb duct is equipped with two at least, corresponds with more than two positions tool bit seat one-to-one respectively.

The technical scheme has the advantages that cooling of different tool bit seats can be achieved, and the overall cooling effect is guaranteed.

Further: the inner cooling flow guide module comprises a module base body fixed on the main body part, a cooling liquid inlet is arranged on the module base body, and a communication channel for communicating the flow guide pipe with the cooling liquid inlet is arranged in the module base body; each flow guide pipe is connected to the module base body.

The above technical scheme who further prescribes a limit to has the beneficial effect that, set up the module base member and be connected to the honeycomb duct on the module base member, can make each module base member pass through same coolant liquid import feed liquor to the problem that the feed liquor structure is complicated when honeycomb duct quantity is more is solved.

Further: and a connecting plane is arranged on the side surface of the module base body and is used for butt joint of the corresponding ends of the flow guide pipe.

The technical scheme further limited has the beneficial effect that the honeycomb duct is conveniently and reliably connected with the module base body.

Further: the main body part is internally provided with a longitudinal main channel extending along the radial direction of the tool shank and a radial communicating channel crossed with the longitudinal main channel, and a cooling liquid inlet of the inner cooling flow guide module is butted at an outer end opening of the radial communicating channel.

The technical scheme has the advantages that the cooling liquid can be conducted through a simple structure, and processing is facilitated.

The forming method of the inner cooling channel of the cutter comprises the following steps: the tool comprises a main body part, an inner cooling flow guide module and a flow guide pipe, wherein the inner cooling flow guide module is fixedly connected to the outer part of the main body part of the tool and comprises a cooling liquid inlet and the flow guide pipe, the flow guide pipe extends to a corresponding tool bit seat to spray cooling liquid towards a cutting area of a tool bit by means of an end opening of the flow guide pipe, so that an inner cooling channel for guiding the cooling liquid to the tool bit is formed, and the extension path of the flow guide pipe can avoid the flow guide pipe from interfering with a workpiece and a machine tool.

The technical scheme has the advantages that by the arrangement of the internal cooling diversion module, cooling liquid can be injected into the internal cooling diversion module through the cooling liquid inlet on the internal cooling diversion module and then sprayed towards the cutting area of the tool bit through the diversion pipe extending to the corresponding tool bit seat, the internal cooling diversion module is fixed on the main body part and can move along with the main body part, and meanwhile, the extension path of the diversion pipe can avoid the diversion pipe from interfering with a workpiece and a machine tool, so that the internal cooling diversion module can play a role in guiding the cooling liquid like an internal cooling channel arranged in the main body part; and the inner cooling diversion module is fixed outside the main body part, compared with the inner cooling channel arranged inside the main body part, the mechanical property of the main body part cannot be influenced, the limitation of factors such as the number and the position of tool bits on the main body part is avoided, the arrangement position is more flexible, and the problem that some cutters in the prior art are difficult to process the inner cooling channel is effectively solved.

Drawings

FIG. 1 is a schematic diagram of a three-step five-edge mechanical clamp of the prior art;

the names of the components corresponding to the corresponding reference numerals in the drawings are: 91. a tool body; 92. a blade; 93. a body portion; 94. a knife handle; 95. a tool bit seat; 96. cooling liquid; 97. a longitudinal main channel; 98. a lateral diagonal channel.

FIG. 2 is a schematic structural diagram of a cutting tool according to embodiment 1 of the present invention;

FIG. 3 is a perspective view of the tool of FIG. 2;

FIG. 4 is a perspective view of an internal cooling air guiding module;

fig. 5 is a schematic view showing a state of the art in which a cooling liquid is sprayed to a tool bit.

Names of components corresponding to corresponding reference numerals in the drawings are: 10. a body portion; 11. a knife handle; 12. a cutter head; 13. a first tool bit seat; 14. a second tool bit seat; 15. a tool bit mounting hole; 16. a longitudinal main channel; 17. a radial communication channel; 20. a blade; 30. an internal cooling diversion module; 31. a module base; 32. a flow guide pipe; 33. a coolant inlet; 35. a connection plane; 36. an inclined portion; 37. a straight portion; 38. a bending part; 39. a spout; 91. a body portion; 92. an ejection port; 93. a tool bit seat; 94. a cutter head; 95. a blade; 96. and (6) cooling the liquid.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, unless otherwise specifically stated or limited, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be detachable or non-detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention is described in further detail below with reference to examples.

Embodiment 1 of a tool body of the present invention:

the tool body comprises a main body part 10, one end of the main body part 10 is provided with a tool handle 11 used for clamping and fixing on a machine tool, the other end of the main body part is provided with two tool bit seats used for arranging tool bits 12 to form cutting edges, the two tool bit seats are respectively a first tool bit seat 13 and a second tool bit seat 14, each tool bit seat is provided with one tool bit 12, and the tool shown in figure 2 is formed.

The tool tip 12 in this embodiment is a fine boring tool tip comprising a blade mount having a blade pocket and a triangular shaped blade 20 removably secured to the blade mount. The first tool bit seat 13 is provided with an inclined plane, and a tool bit mounting hole 15 with an inclined axis is arranged on the inclined plane; the second tool tip seat 14 is formed by a flat surface portion provided on one side in the radial direction of the main body portion 10, and is provided with a tool tip mounting hole 15 perpendicular to the tool body axis. The rake faces of the inserts 20 on the two insert 20 mounting seats are perpendicular to the tangential direction of the outer peripheral surface of the main body portion 10.

In this tool, a preferable cooling liquid supply method is to spray the cooling liquid toward the rake face of the insert 20, but as shown in fig. 5, due to the shape restriction of the cutting tip 94, the cooling liquid 96 cannot be directly and accurately sprayed toward the cutting region formed by the insert 95 on the cutting tip 94 through the spray port 92 on the main body portion 91; further, since the two tips 12 have a tight tip seat pitch, the portion of the body portion 10 located therebetween does not have a space for machining a lateral slant passage. If the coolant is introduced into the tool bit mounting hole 15, and the coolant channel is arranged on the tool bit seat, the coolant pressure is high, acting force can be generated on the tool bit 12, fine cutting chips and oil stains can be carried into the tool bit mounting hole 15 by the coolant, the tool bit 12 can be heightened during mounting, and therefore the precision of the tool is affected (when the tool bit is mounted in the tool bit mounting hole 15 at present, foreign matters in the tool bit mounting hole 15 need to be stuck out to ensure the mounting precision), and therefore the longitudinal main channel 16 in the center of the main body part 10 cannot be communicated with the tool bit mounting hole 15. In addition, for the use environment of the fine boring tool, the direct arrangement of the inner cooling channel on the main body 10 will also affect the machining precision and mechanical properties of the tool.

The idea of arranging the inner cooling channel in the main body part 10 is changed, the inner cooling channel is established by the inner cooling diversion module 30 additionally arranged outside the main body part 10, and the cutting area of the cutter can be ensured to be accurately sprayed with cooling liquid, so that the requirement of inner cooling is met.

Specifically, as shown in fig. 2, 3 and 4, the internal cooling flow guide module 30 includes a module base 31 and two flow guide pipes 32 connected to the module base 31, and the internal cooling flow guide module 30 is integrally grafted on the machined main body portion 10 by means of 3D metal printing. The 3D metal Printing is implemented by using metal powder as a raw material, and by using any one of Fused Deposition Modeling (FDM), Selective Laser Sintering (SLS), Selective Laser Melting (SLM), and Three Dimensional Printing (3 DP). The metal powder has strong affinity with the cutter body, and can be iron powder, chromium powder, tin powder, nickel powder, ferrochrome powder and the like. Grafting the corresponding structure on other objects in a 3D printing mode is a common means in the field of 3D printing, and can realize direct connection of the corresponding structure and other objects, and the detailed description is omitted here.

The module base 31 is a cylinder structure with a cross section of a regular hexagon, a communication channel vertically arranged along the axis of the cylinder is arranged inside the module base, the top of the communication channel is closed, and the bottom of the communication channel is provided with an opening to form a cooling liquid inlet 33. The module base 31, the first tool bit seat 13 and the second tool bit seat 14 are arranged in a straight line along the axial direction of the tool body. The two flow guide pipes 32 correspond to the two tool bit seats respectively, one ends of the two flow guide pipes 32 are connected to the connecting planes 35 formed by the two side surfaces of the regular hexagonal cylinder respectively and communicated with the communicating channel on the module base body 31, the other ends of the two flow guide pipes extend to the corresponding tool bit seats, the end openings extending to one ends of the corresponding tool bit seats form nozzles 39 for spraying cooling liquid towards the cutting area of the tool bit 12, and the nozzles 39 do not exceed the processing range of the tool in all directions, so that interference between a workpiece and a machine tool is avoided. The main body part 10 is provided with a longitudinal main channel 16 extending along the radial direction of the tool holder 11 and a radial communicating channel 17 vertically crossed with the longitudinal main channel 16, corresponding to the inner cooling flow guide module 30, and a cooling liquid inlet 33 of the inner cooling flow guide module 30 is butted at an outer end opening of the radial communicating channel 17.

As shown in fig. 4, each of the flow ducts 32 is integrally divided into two parts, one part is an extension part extending toward the tool bit seat, the other part is a bent part 38 arranged in an "L" shape from the extension part to face the rake face of the tool, and the nozzle 39 is provided at the tip of the bent part 38. The extension portion is divided into an inclined portion 36 and a straight portion 37, and the inclined portion 36 and the bent portion 38 are located on the same side in the radial direction of the straight portion 37. For the flow guide tube 32 corresponding to the first tool bit seat 13, the space between the inclined portion 36 and the bent portion 38 on the flow guide tube 32 can be free from the second tool bit seat 14, and the inclined portion 36 and the straight portion 37 enable the bent portion 38 to face the rake face of the blade 20 on the first tool bit seat 13 from the side direction of the rake face. For the flow guide tube 32 corresponding to the second tool tip seat 14, the space between the inclined portion 36 and the bent portion 38 on the flow guide tube 32 can avoid the flow guide tube 32 corresponding to the first tool tip seat 13, and the inclined portion 36 and the straight portion 37 can enable the bent portion 38 to face the rake face from the side of the rake face of the blade 20 on the second tool tip seat 14.

In order to avoid the influence of the bent portion of the flow guide tube 32 on the flow rate and the injection pressure of the cooling liquid, the bent angle of the bent portion of the flow guide tube 32 is larger than 90 degrees and is in smooth transition. In addition, the inner diameter of the passage at the end of the draft tube 32 is gradually decreased to increase the injection pressure of the cooling liquid, so that the cooling liquid can exert its effect better.

In addition, in the embodiment, the cross-sectional area of the main body part 10 is S, the cross-sectional area of the longitudinal main channel 16 is S1, and in order to ensure that the cutter body has enough strength and rigidity, S1< S/20; in order to ensure sufficient injection pressure of the coolant, the cross-sectional area S1 of the longitudinal main passage 16 is larger than the cross-sectional area S2 of the radial communication passage 17, and the passage cross-sectional area S2 of the radial communication passage 17 is larger than the sum of the flow areas of the two flow guide pipes 32.

When the tool is used, the tool body is clamped on a machine tool clamp and is connected with a cooling liquid supply system on a machine tool. When a workpiece is machined, cooling liquid supplied by a cooling liquid supply system sequentially enters the inner cooling flow guide module 30 through the longitudinal main channel 16 and the radial communicating channel 17, and is accurately sprayed to a cutting area of a corresponding tool bit seat through each flow guide pipe 32, so that a tool and the workpiece can be rapidly cooled, chips can be broken and removed, the machining quality of the workpiece is improved, the service life of the tool is prolonged, and the machining efficiency is improved. Since the cooling liquid does not need to be sprayed to each corresponding tool bit 12 through the cooling channel corresponding to each tool bit 12, the problem that the mechanical property and the machining precision of the tool cannot be affected or the cooling channel cannot be formed due to structural limitation of the tool can be avoided.

Embodiment 2 of a tool body of the present invention:

the present embodiment is different from embodiment 1 in that: in example 1, the internal cooling and guiding module 30 is grafted on the main body 10 by means of 3D metal printing. In this embodiment, the internal cooling module 30 is formed by casting and is fixed to the main body 10 by welding.

In other embodiments, the internal cooling module 30 may be formed in other manners, such as by removing material through a machining process, or by combining machining with sheet metal. The fixing mode of the internal cooling diversion module 30 and the main body part 10 can also be in the form of threaded connection, flange connection and the like.

Embodiment 3 of one kind of tool body in the present invention:

the present embodiment is different from embodiment 1 in that: in embodiment 1, two tool bit seats are provided on the main body portion 10, and two flow guide pipes 32 are provided, which correspond to the two tool bit seats respectively. In this embodiment, three tool bit seats are disposed on the main body 10, and three flow guide pipes 32 are correspondingly disposed.

In other embodiments, the number of flow conduits 32 may be increased or decreased depending on the number of tool tip seats and cooling requirements. For the tool capable of arranging the internal flow channel in the main body part 10, the internal flow channel is preferentially arranged in the main body part 10, and the internal cooling flow guide module 30 can be designed in a matching way for the tool without a lateral inclined channel, so that the number of the flow guide pipes 32 is reduced to reduce the complexity of the external structure of the tool body.

Embodiment 4 of a tool body of the present invention:

the present embodiment is different from embodiment 1 in that: in embodiment 1, the internal cooling air guide module 30 includes a module base 31 and a guide pipe 32 connected to the module base 31. In this embodiment, the internal cooling diversion module 30 is not provided with the module base 31, and one end of each diversion tube 32 is connected with a connector, and the connector is provided with a cooling liquid inlet 33. In other embodiments, the flow conduits 32 may be independently connected to the tool body.

Embodiment 5 of a tool body of the present invention:

the present embodiment is different from embodiment 1 in that: in the embodiment 1, the cooling liquid inlet 33 of the internal cooling diversion module 30 is connected with the longitudinal main channel 16 and the radial communication channel 17 in the main body part 10. In the embodiment, the cooling liquid inlet 33 of the internal cooling diversion module 30 is exposed outside, and the machine tool directly supplies cooling liquid to the internal cooling diversion module 30 through a pipeline.

In the above embodiment, the flow guide tube 32 of the internal cooling flow guide module 30 includes the inclined portion 36, the straight portion 37 and the bent portion 38, and is generally "U" shaped. In other embodiments, the flow guide tube 32 may have other shapes, such as an overall "L" shape, and the nozzle 39 for spraying the cooling fluid toward the cutting area of the tool bit 12 may be formed, and the orientation of the nozzle is selected according to the structural shape of the workpiece and the machining condition, so that the cooling fluid can better assist in chip removal.

Example 1 of the method for forming the internal cooling passage of the cutter of the present invention:

the method is characterized in that an inner cooling flow guide module 30 is grafted outside a main body part 10 of a cutter in a 3D metal printing mode, wherein the inner cooling flow guide module 30 is the inner cooling flow guide module 30 described in the embodiment 1 of the cutter body and is provided with a cooling liquid inlet 33 and a flow guide pipe 32. An internal cooling channel is formed by means of the flow tube 32 to guide the cooling liquid to the tool head seat, with the end opening of the flow tube 32 forming a spout 39 for spraying the cooling liquid toward the tool head 12 and avoiding interference with the workpiece and the machine tool.

In other embodiments of the method for forming the internal cooling channel of the tool, the internal cooling air guide module 30 may be formed in other manners, such as by casting, and fixed to the body portion 10 by welding. And if the sheet metal is formed by removing materials through a machining process, the sheet metal can be formed by combining machining and sheet metal. The fixing mode of the internal cooling diversion module 30 and the main body part 10 can also be in the form of threaded connection, flange connection and the like.

In other embodiments of the method for forming the internal cooling channel of the tool, the internal cooling diversion module 30 may not be provided with the module base 31, and one end of each diversion tube 32 is connected with a connector, and the connector is provided with a cooling liquid inlet 33. The guide pipes 32 may be connected to the tool body independently of each other.

In other embodiments of the method for forming the internal cooling channel of the tool, the flow guide tube 32 may have other shapes, for example, an overall shape of "L", and it is sufficient to form the spray nozzle 39 for spraying the cooling fluid toward the cutting area of the tool bit 12, and the orientation of the spray nozzle should be selected according to the structural shape of the workpiece and the machining condition, so that the cooling fluid can better assist in chip removal.

In the above embodiments, the internal cooling diversion module is used for a non-standard tool, and in other embodiments, the internal cooling diversion module can also be used for a standard tool. The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

1. A tool body comprises a main body part (10), wherein one end of the main body part (10) is provided with a tool shank (11) used for clamping and fixing on a machine tool, the other end of the main body part is provided with at least one tool bit seat, and the tool bit seat is used for mounting a tool bit (12) to form a cutting edge, and the tool body is characterized by further comprising an inner cooling flow guide module (30) fixed outside the main body part (10), the inner cooling flow guide module (30) is provided with a cooling liquid inlet (33), and a flow guide pipe (32) communicated with the cooling liquid inlet (33) is further arranged; a flow duct (32) extends to the respective head seat, the path of extension being such as to avoid interference with the workpiece and with the machine tool, the end opening of the flow duct forming a jet (39) for spraying a cooling liquid towards the cutting area of the tool head (12).

2. The tool body according to claim 1, wherein the flow guide tube (32) comprises an extension part extending towards the tool bit seat, and further comprises a bent part (38) arranged in an L shape with the extension part to face the rake face of the tool, and the nozzle (39) is arranged at the end of the bent part (38).

3. The tool body according to claim 2, wherein the internal cooling flow guide module (30) comprises a module base body (31) fixed on the main body part (10), and the flow guide pipe (32) is connected to the module base body (31); the extension part comprises an inclined part (36) connected with the module base body (31) and a straight part (37) connected between the inclined part (36) and the bent part (38), and the inclined part (36) and the bent part (38) are positioned on the same radial side of the straight part (37) and are used for enabling the flow guide pipe (32) to avoid objects on the extending path and face towards the front tool face from the side direction of the front tool face.

4. The tool body according to claim 1, 2 or 3, wherein the internally cooled deflector module (30) is grafted onto the machined body portion (10) by means of 3D metal printing.

5. The tool body according to claim 1, 2 or 3, wherein the flow guide pipe (32) is provided with at least two parts which are respectively corresponding to more than two tool bit seats one by one.

6. The tool body according to claim 5, wherein the internal cooling flow guide module (30) comprises a module base body (31) fixed on the main body part (10), the cooling liquid inlet (33) is arranged on the module base body (31), and a communication channel for communicating the flow guide pipe (32) with the cooling liquid inlet (33) is arranged in the module base body (31); each guide pipe (32) is connected to the module base body (31).

7. The tool body according to claim 6, characterized in that the module base body (31) is provided with a connecting plane (35) on the side for abutting against the corresponding end of the flow guide tube (32).

8. The tool body according to claim 1, 2 or 3, characterized in that a longitudinal main channel (16) extending along the radial direction of the tool shank (11) and a radial communication channel (17) intersecting the longitudinal main channel (16) are arranged in the main body part (10), and the cooling liquid inlet (33) of the internal cooling flow guide module (30) is butted at an outer end opening of the radial communication channel (17).

9. The method for forming the internal cooling channel of the tool is characterized in that the method is fixedly connected with an internal cooling flow guide module (30) outside a main body part (10) of the tool, the internal cooling flow guide module (30) comprises a cooling liquid inlet (33) and a flow guide pipe (32), the flow guide pipe (32) extends to a corresponding tool bit seat to spray cooling liquid towards a cutting area of a tool bit (12) by means of an end opening of the flow guide pipe (32) so as to form the internal cooling channel for guiding the cooling liquid to the tool bit, and the flow guide pipe (32) extends along a path capable of avoiding the flow guide pipe (32) from interfering with a workpiece and a machine tool.

10. The method for forming the internal cooling channel of the tool according to claim 9, wherein the internal cooling flow guide module (30) is grafted on the machined main body part (10) by means of 3D metal printing.