A composite milling cutter

Abstract

The application discloses a composite milling cutter and relates to the technical field of machining.The composite milling cutter comprises a milling cutter disc, a cutter shaft part, a heat dissipation assembly and a limiting assembly, the lower end of the cutter shaft part is provided with a cutter bar, the milling cutter disc is arranged at the lower end of the cutter bar, the heat dissipation assembly is arranged on the cutter bar and the milling cutter disc, and the milling cutter disc is detachably connected with the cutter bar through the limiting assembly, so that the milling cutter disc can be conveniently disassembled and the heat dissipation assembly can be conveniently cleaned.The fan-shaped back milling cutter is used to make the cutter bar and the milling cutter disc eccentric, the back milling cutter is made into a composite milling cutter, the chamfering cutter blade with an angle of 45 degrees is arranged on the fan-shaped root part to chamfer the edges, the number of tool changing is reduced, the machining efficiency is improved, the milling cutter disc and the bottom cover plate are detachably connected through the limiting assembly, the milling cutter disc is conveniently replaced or the heat dissipation assembly in the milling cutter disc is conveniently cleaned, and the limiting assembly can simultaneously disassemble and assemble the milling cutter disc and the bottom cover plate, so that the disassembling and assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining, in particular to a composite milling cutter. BACKGROUND

[0002] The existing circular back milling cutter can only process the back surface, and the hole end chamfer needs to be processed by another cutter, which increases the processing time. When processing the back surface of the hole, the disc milling cutter cannot completely remove the excess root, and in order to remove the excess heat and protect the milling cutter, cooling liquid needs to be introduced into the milling cutter. After the milling cutter is cooled for a long time, the dirt attached to the internal heat dissipation groove needs to be cleaned in time. However, the existing technology is not convenient for disassembling the milling cutter and cleaning the internal heat dissipation groove after disassembly. SUMMARY

[0003] The purpose of the present application is to provide a composite milling cutter to overcome the above-mentioned defects in the prior art.

[0004] A composite milling cutter, comprising a milling cutter disc, a cutter shaft part, a heat dissipation assembly and a limiting assembly, the lower end of the cutter shaft part is provided with a cutter bar, and the milling cutter disc is arranged at the lower end of the cutter bar;

[0005] The heat dissipation assembly is arranged on the cutter bar and the milling cutter disc and is used for dissipating heat from the milling cutter disc during processing;

[0006] The milling cutter disc is detachably connected with the cutter bar through the limiting assembly, so that the milling cutter disc can be easily disassembled and the heat dissipation assembly can be easily cleaned.

[0007] Preferably, the milling cutter disc is arranged on the bottom of the cutter bar in an off-axis manner, a plurality of milling surface blades are uniformly distributed on the milling cutter disc, and a chamfer blade is arranged at the fan-shaped root of the milling cutter disc.

[0008] Preferably, the inclination angle of the chamfer blade is 45°.

[0009] Preferably, the heat dissipation assembly comprises a hollow ring and a bottom cover plate, the lower end of the cutter bar is inserted into the mounting hole on the milling cutter disc, the hollow ring is rotatably connected to the cutter bar, the hollow ring is provided with a connecting pipe which is threadedly connected with a cooling liquid pipe, the cutter bar is provided with a water inlet hole which is in communication with the hollow ring, an internal heat dissipation groove is arranged along the inner side of the milling surface blade and the chamfer blade of the milling cutter disc, one end of the internal heat dissipation groove is in communication with the outlet of the lower end of the water inlet hole, the other end of the internal heat dissipation groove is in communication with the inlet of the water outlet hole on the cutter bar, and the bottom cover plate is arranged at the bottom of the milling cutter disc.

[0010] Preferably, the limiting assembly comprises a pull rod, an insertion block and a spring, the pull rod is slidingly connected to the connecting plate in the installation slot at the bottom of the cutter bar, the insertion block is arranged at the inner end of the pull rod and slidingly connected with the cutter bar, the spring is sleeved on the pull rod and located between the insertion block and the connecting plate, the inner end of the insertion block is provided with an extrusion inclined surface, the side surface of the bottom cover plate is provided with an insertion slot matched with the insertion block, the top of the milling cutter disc is provided with a limiting hole at the side surface of the installation hole, the side surface of the bottom of the limiting hole is provided with a driving inclined surface matched with the extrusion inclined surface of the insertion block, and the side surface of the cutter bar is provided with a limiting block matched with the limiting hole.

[0011] Preferably, the inside of the bottom cover plate is provided with a plurality of insertion rods inserted into the insertion holes of the milling cutter disc, and the insertion rods are in interference fit with the insertion holes.

[0012] The present application has the following advantages:

[0013] In use, the present application can make the cutter bar and the milling cutter disc eccentric by using the fan-shaped back milling cutter, can make the back milling cutter into a composite milling cutter, can chamfer the edges by the chamfering blade with an angle of 45° added at the root of the fan-shaped back milling cutter while milling the surface by the milling surface blade, reduces the number of tool changing and improves the machining efficiency, and the limiting assembly can detachably connect the milling cutter disc and the bottom cover plate, facilitates the replacement of the milling cutter disc or the cleaning of the heat dissipation assembly inside the milling cutter disc, and the limiting assembly can simultaneously disassemble and assemble the milling cutter disc and the bottom cover plate, improving the disassembly and assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic view of the overall three-dimensional structure of the present application.

[0015] Figure 2 It is a schematic view of the structure of the bottom of the present application.

[0016] Figure 3 It is a schematic view of the structure of the bottom of the present application when the bottom cover plate is not installed.

[0017] Figure 4 It is a top view of the overall structure of the present application.

[0018] Figure 5 It is Figure 4 It is a sectional view along the direction of A-A.

[0019] Figure 6 It is a schematic view of the structure of the cutter shaft part and the cutter bar of the present application.

[0020] Figure 7 It is a schematic view of the structure of the bottom of the cutter shaft part and the cutter bar of the present application.

[0021] Figure 8 It is a schematic view of the structure of the milling cutter disc of the present application.

[0022] Figure 9It is a structural schematic view of the bottom cover plate of the application.

[0023] Wherein: 1, cutter shaft part; 2, cutter bar; 3, milling cutter disc; 31, milling surface blade; 32, chamfer blade; 33, mounting hole; 34, insertion hole; 4, heat dissipation assembly; 41, hollow ring; 411, connecting pipe; 42, water inlet hole; 43, inner heat dissipation groove; 44, water outlet hole; 45, bottom cover plate; 451, insertion slot; 452, insertion rod; 5, limiting assembly; 51, pull rod; 52, mounting groove; 521, connecting plate; 53, insertion block; 531, extrusion inclined surface; 54, spring; 55, limiting hole; 56, driving inclined surface; 57, limiting block. DETAILED DESCRIPTION

[0024] The specific embodiments of the application will be further described in detail below with reference to the drawings and by describing the embodiments, so as to help the skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the application.

[0025] As Figures 1-9 shown, the application provides a composite milling cutter, which comprises a milling cutter disc 3, a cutter shaft part 1, a heat dissipation assembly 4 and a limiting assembly 5, the lower end of the cutter shaft part 1 is provided with a cutter bar 2, the milling cutter disc 3 is arranged at the lower end of the cutter bar 2, the heat dissipation assembly 4 is arranged on the cutter bar 2 and the milling cutter disc 3 and is used for dissipating heat of the milling cutter disc 3 during machining, and the milling cutter disc 3 is detachably connected with the cutter bar 2 through the limiting assembly 5, so as to facilitate disassembly of the milling cutter disc 3 and cleaning of the heat dissipation assembly 4.

[0026] It should be noted that the milling cutter disc 3 is arranged at the bottom of the cutter bar 2 in an eccentric manner, the milling cutter disc 3 is uniformly provided with a plurality of milling surface blades 31, the fan-shaped root of the milling cutter disc 3 is provided with a chamfer blade 32, the inclination angle of the chamfer blade 32 is 45°, the eccentric distance is determined according to the machining width of the back surface of the hole and the size of the inner hole, the number of the back milling surface blades is determined according to the size of the hole, and the chamfer blade is added at the root, so that the edge is chamfered during milling.

[0027] In addition, the heat dissipation assembly 4 comprises a hollow ring 41 and a bottom cover plate 45, the lower end of the cutter bar 2 is inserted into the mounting hole 33 on the cutter head 3, the hollow ring 41 is rotatably connected to the cutter bar 2, the connecting pipe 411 is provided on the hollow ring 41 and is screwed with the cooling liquid pipe, the water inlet hole 42 is provided on the cutter bar 2 and is communicated with the hollow ring 41, the inner heat dissipation groove 43 is provided along the inner side of the milling surface blade 31 and the chamfer blade 32 of the cutter head 3, one end of the inner heat dissipation groove 43 is communicated with the lower end outlet of the water inlet hole 42, the other end of the inner heat dissipation groove 43 is communicated with the water outlet hole 44 on the cutter bar 2, the bottom cover plate 45 is arranged at the bottom of the cutter head 3, the inner part of the bottom cover plate 45 is provided with a plurality of insertion rods 452 which are inserted into the insertion holes 34 on the cutter head 3, the insertion rods 452 are in interference fit with the insertion holes 34, so that the bottom cover plate 45 is more firmly connected with the cutter head 3.

[0028] In addition, the limiting assembly 5 comprises a pull rod 51, an insertion block 53 and a spring 54, the pull rod 51 is slidingly connected to the connecting plate 521 in the mounting groove 52 at the bottom of the cutter bar 2, the insertion block 53 is arranged at the inner end of the pull rod 51 and is slidingly connected with the cutter bar 2, the spring 54 is sleeved on the pull rod 51 and is located between the insertion block 53 and the connecting plate 521, the inner end of the insertion block 53 is provided with an extrusion inclined surface 531, the side of the bottom cover plate 45 is provided with an insertion groove 451 which is matched with the insertion block 53, the top of the cutter head 3 is provided with a limiting hole 55 at the side of the mounting hole 33, the side of the bottom of the limiting hole 55 is provided with a driving inclined surface 56 which is matched with the extrusion inclined surface 531 of the insertion block 53, the side of the cutter bar 2 is provided with a limiting block 57 which is matched with the limiting hole 55.

[0029] DETAILED DESCRIPTION AND PRINCIPLES

[0030] In actual application, the knife shaft part 1 and the knife bar 2 are installed on the main shaft of the milling machine, the milling cutter disc 3 is driven to rotate during machining, the milling surface of the part is milled by the milling surface blade 31 on the milling cutter disc 3, the edge is chamfered by the chamfering blade 32 at the same time of milling the surface, the cooling liquid enters the water inlet hole 42 of the knife bar 2 through the connecting pipe 411 of the hollow ring 41, and the milling cutter disc 3 is cooled by the inner heat dissipation groove 43 in the milling cutter disc 3, and the cooling liquid is discharged through the water outlet hole 44; when the milling cutter disc 3 needs to be disassembled for replacement or cleaning after machining, the pull rod 51 of the limiting assembly 5 is pulled outward, the plug block 53 on the pull rod 51 is separated from the insertion slot 451 of the bottom cover plate 45, then the milling cutter disc 3 and the bottom cover plate 45 are taken off from the knife bar 2, the milling cutter disc 3 is replaced or the inner heat dissipation groove 43 in the milling cutter disc 3 is cleaned, when the replacement or cleaning is completed, the bottom cover plate 45 is inserted into the insertion hole 34 of the milling cutter disc 3 through the insertion rod 452 thereon, then the knife bar 2 is inserted into the mounting hole 33 of the milling cutter disc 3, and the plug block 53 is opposite to the limiting hole 55, then the knife bar 2 is moved towards, the spring 54 on the pull rod 51 is compressed under the extrusion of the inclined surface 56 on the limiting hole 55, when the plug block 53 is opposite to the insertion slot 451 of the bottom cover plate 45, the limiting block 57 on the side of the knife bar 2 is located in the limiting hole 55, then the plug block 53 is inserted into the insertion slot 451 of the bottom cover plate 45 under the elastic force of the spring 54, so that the milling cutter disc 3 and the bottom cover plate 45 are fixed with the knife bar 2.

[0031] In summary, the fan-shaped back milling cutter is used to make the knife bar 2 and the milling cutter disc 3 eccentric, the back milling cutter is made into a composite milling cutter, the edge is chamfered by the chamfering blade 32 with an angle of 45° at the fan-shaped root part at the same time of milling the surface by the milling surface blade 31, the number of tool changing is reduced, the machining efficiency is improved, the limiting assembly 5 is arranged to detachably connect the milling cutter disc 3 and the bottom cover plate 45, the milling cutter disc 3 is conveniently replaced or the heat dissipation assembly 4 in the milling cutter disc 3 is conveniently cleaned, and the limiting assembly 5 can simultaneously disassemble and assemble the milling cutter disc 3 and the bottom cover plate 45, so that the disassembly and assembly efficiency is improved.

[0032] The application is described above by way of example in connection with the drawings, and obviously the specific implementation of the application is not limited by the above method, as long as various non-essential improvements are made by using the concept and technical scheme of the application, or the application and the technical scheme are directly applied to other occasions without improvement, which are all within the protection scope of the application.

Claims

1. A composite end mill, characterized in that: It includes a cutter shaft (1), a milling cutter disc (3), a heat dissipation assembly (4), and a limiting assembly (5). The lower end of the cutter shaft (1) is provided with a cutter bar (2), and the milling cutter disc (3) is located at the lower end of the cutter bar (2). The heat dissipation component (4) is provided on the tool holder (2) and the milling cutter disc (3) and is used to dissipate heat from the milling cutter disc (3) during processing; The heat dissipation assembly (4) includes a hollow ring (41) and a bottom cover plate (45). The lower end of the tool bar (2) is inserted into the mounting hole (33) on the milling cutter disc (3). The hollow ring (41) is rotatably connected to the tool bar (2). The hollow ring (41) is provided with a connecting pipe (411) that is threadedly connected to the coolant pipe. The tool bar (2) is provided with a water inlet hole (42) that communicates with the hollow ring (41). An inner heat dissipation groove (43) is provided along the inner side of the milling cutter blade (31) and the chamfering cutter blade (32) of the milling cutter disc (3). One end of the inner heat dissipation groove (43) is connected to the lower end outlet of the water inlet hole (42). The other end of the inner heat dissipation groove (43) is connected to the inlet of the water outlet hole (44) on the tool bar (2). The bottom cover plate (45) is located at the bottom of the milling cutter disc (3). The milling cutter disc (3) is detachably connected to the cutter bar (2) via the limiting component (5), which facilitates the disassembly of the milling cutter disc (3) and the cleaning of the heat dissipation component (4); The limiting component (5) includes a pull rod (51), a plug (53), and a spring (54). The pull rod (51) is slidably connected to a connecting plate (521) in the mounting groove (52) at the bottom of the cutter bar (2). The plug (53) is located at the inner end of the pull rod (51) and is slidably connected to the cutter bar (2). The spring (54) is sleeved on the pull rod (51) and located between the plug (53) and the connecting plate (521). The plug (53) has a... The inner end is provided with an extrusion slope (531), the side of the bottom cover plate (45) is provided with a slot (451) that cooperates with the insert block (53), the top of the milling cutter disc (3) is provided with a limiting hole (55) on the side of the mounting hole (33), the bottom side of the limiting hole (55) is provided with a driving slope (56) that cooperates with the extrusion slope (531) of the insert block (53), and the side of the cutter bar (2) is provided with a limiting block (57) that cooperates with the limiting hole (55). The bottom cover plate (45) is provided with several insert rods (452) that are inserted into the insertion holes (34) on the milling cutter disc (3), and the insert rods (452) are interference-fitted with the insertion holes (34).

2. The composite milling cutter according to claim 1, characterized in that: The milling cutter disc (3) is located off-axis at the bottom of the cutter bar (2). Several milling cutter blades (31) are evenly distributed on the milling cutter disc (3). A chamfering blade (32) is provided at the fan-shaped root of the milling cutter disc (3).

3. A composite milling cutter according to claim 2, characterized in that: The chamfering blade (32) has a tilt angle of 45°.

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