Disc type milling cutter capable of finely adjusting eccentricity

Abstract

The invention belongs to the technical field of cutting machining, and provides an eccentricity fine adjustment disc type milling cutter which comprises a base, a containing cavity defined in the base and a plurality of pressure adjusting cavities communicated with the top face of the containing cavity, the pressure adjusting cavities are distributed in the circumferential direction of the base at intervals, and all the pressure adjusting cavities are communicated with the containing cavity to form a communicating vessel structure. The communicating vessel structure is filled with a hydraulic medium, the hydraulic medium serves as a pressure conduction medium in the communicating vessel structure, and by means of the characteristics that the hydraulic medium is good in liquidity and incompressible, the descending amount of the pressure adjusting piston in one pressure adjusting cavity is transmitted in a pressure transmission mode and converted into the ascending amount of the pressure adjusting pistons in other pressure adjusting cavities; therefore, the mass center of the disc type milling cutter is adjusted in a linkage control mode, mass center transition of the disc type milling cutter is achieved by adjusting the multiple adjusting bolts, and the adjusting requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of cutting processing, in particular to a disc milling cutter with fine adjustment of eccentricity. Background Art

[0002] In some existing milling cutters and milling machines, the eccentricity problem of the milling cutter during high-speed operation is mostly caused by the eccentric wear of the superhard material on the milling cutter. For example, when multiple superhard materials are clamped on a disc milling cutter for cutting, because the cutting part of the disc milling cutter is at the edge of the cutter disc, it is far away from the center of the disc milling cutter, that is, it is far away from the connection between the disc milling cutter and the spindle of the milling machine, so once the center of gravity of the disc milling cutter deviates from the rotation axis of the spindle of the milling machine, dynamic imbalance will occur during the high-speed operation of the milling cutter, resulting in inconsistent cutting forces between each superhard material and the workpiece, thereby causing the problem of eccentric wear of the milling cutter. In the prior art, in order to solve the problem of eccentric wear of the milling cutter, technical means such as improving the machining accuracy and clamping accuracy of the milling cutter and improving the clamping accuracy of the workpiece are mostly used. However, these technical means are either costly or difficult to operate. Therefore, the prior art urgently needs a technical solution that can conveniently and reliably improve the problem of eccentric wear of the milling cutter.

[0003] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] Based on this, it is necessary to provide an eccentric fine-adjustable disc milling cutter that can conveniently and reliably improve the eccentric wear problem of the milling cutter in response to the problems existing in the current milling cutters.

[0005] The above purpose is achieved through the following technical solutions: An eccentric fine-adjustable disc milling cutter, suitable for a horizontal milling machine, comprising: A base connected to the lower end of the spindle of the horizontal milling machine, wherein a receiving chamber and a pressure regulating chamber communicating with the top surface of the receiving chamber are defined in the base, wherein the pressure regulating chambers are multiple and are distributed at intervals in the circumferential direction of the base, wherein each of the pressure regulating chambers is communicated with the receiving chamber to form a communicating vessel structure, wherein the communicating vessel structure is filled with hydraulic medium, and a pressure regulating piston is provided in each of the pressure regulating chambers to slide up and down in a sealed manner, wherein an adjusting bolt is abutted above the pressure regulating piston to promote: The adjusting bolt is screwed in to squeeze the pressure regulating piston, so that the liquid level of the hydraulic medium in the corresponding pressure regulating chamber is pressed down by the pressure regulating piston; The adjusting bolt is loosened to free the pressure regulating piston, thereby allowing the liquid level of the hydraulic medium in the corresponding pressure regulating chamber to push the pressure regulating piston upward.

[0006] Furthermore, the eccentricity fine-adjusting disc milling cutter further comprises: A pressure regulating disc always immersed in the hydraulic medium, the pressure regulating disc is in the accommodating cavity, a plurality of plugs protruding upward are formed on the top of the pressure regulating disc, and each of the plugs is distributed in a one-to-one correspondence with the pressure regulating cavity, so that each of the plugs can block the lower end opening of the corresponding pressure regulating cavity; A first adjusting handle is fixed at the lower end of the pressure regulating disk, and the first adjusting handle is non-rotatable and extends out from the lower end of the base in a sliding and sealing manner.

[0007] Furthermore, an annular gap is formed between the side wall of the pressure regulating disk and the cavity wall of the accommodating cavity, so that when the pressure regulating disk moves up and down, the hydraulic medium flows from one end of the pressure regulating disk to the other end through the annular gap.

[0008] Furthermore, a mounting hole extending vertically through the first adjusting handle is provided, and the second adjusting handle is inserted into the mounting hole in a sliding and sealing manner up and down; and an avoidance opening connected to the upper end opening of the mounting hole is provided on the pressure regulating disk, so that the second adjusting handle can extend from the upper end of the pressure regulating disk through the avoidance opening.

[0009] Further, the mounting hole has an upper hole section opening upward and a lower hole section opening downward, which are coaxially arranged, and the aperture of the upper hole section is larger than the aperture of the lower hole section, so that an upward shrinking step is formed at the transition between the upper hole section and the lower hole section of the mounting hole; and: The second adjustment handle comprises an upper rod section that is slidably inserted into and fits in a complementary manner with the upper hole section of the mounting hole, and a lower rod section that is slidably inserted into and fits in a complementary manner with the lower hole section of the mounting hole; wherein an annular protrusion is formed on the side wall of the upper rod section to form a circumferential seal with the upper hole section, and a shoulder is formed at the lower end of the upper rod section to surround the outer periphery of the lower rod section and to form an end face seal with the shrinking step.

[0010] Furthermore, the lower end of the lower rod section extends out from the lower end of the mounting hole, and the side wall of the extended section is clamped in a clamp; wherein the clamp comprises: A fixing seat fixed to the lower end of the first adjusting handle, wherein the fixing seat is located on one side of the extending section of the lower rod section; Two clamp arms are hinged on both sides of the fixing seat, and the hinged ends of the clamp arms are connected to abut against a first spring, so as to cause the free ends of the two clamp arms to abut against the side walls of the extended section of the lower rod section; and a damping block made of rubber is arranged at the free end of the clamp arm, and the side wall of the damping block is squeezed and frictionally matched with the side wall of the extended section of the lower rod section; and: A stop flange for stopping below the clamp is formed at the end of the extended section of the lower rod section.

[0011] Furthermore, the accommodating cavity is a cylindrical cavity extending up and down; the pressure regulating disk is a regular hexagonal plate, and each vertex of the pressure regulating disk is rounded, and the plug is arranged at each vertex of the pressure regulating disk.

[0012] Further, the plug includes a cylindrical column portion, the diameter of which is larger than the lower opening diameter of the pressure regulating chamber; and a conical cone head end is formed on the column portion for inserting into the pressure regulating chamber; and: When the plug blocks the lower end opening of the pressure regulating chamber, there is a distance between the upper wall of the accommodating chamber and the upper plate wall of the pressure regulating plate.

[0013] Furthermore, the eccentricity fine-adjusting disc milling cutter further comprises: A sealing tray is arranged in the accommodating cavity in an upward and downward sliding and sealing manner, and the lower end of the sealing tray abuts against a second spring in the accommodating cavity to cause the hydraulic medium to be lifted upward by the sealing tray.

[0014] Furthermore, the lower end of the adjusting bolt is spaced apart from its corresponding pressure regulating piston in the up-down direction, and the friction force between the pressure regulating piston and its corresponding pressure regulating chamber is greater than or equal to the thrust force applied by the hydraulic medium on the pressure regulating piston at room temperature, so that the pressure regulating piston is pushed upward by the hydraulic medium when the temperature of the hydraulic medium is greater than room temperature.

[0015] The beneficial effects of the present invention are: The eccentricity fine-adjustable disc milling cutter of the present invention uses hydraulic medium as the pressure transmission medium in the communicating vessel structure, and utilizes the characteristics of good fluidity and constant volume of the hydraulic medium, so that the descending amount of the pressure regulating piston in a mutually parallel pressure regulating chamber can be transmitted in the form of pressure transmission and converted into the ascending amount of the pressure regulating piston in the other pressure regulating chamber, thereby realizing the displacement of the center of mass of the disc milling cutter in the form of linkage control, and realizing the change of the center of mass of the disc milling cutter by adjusting multiple adjusting bolts, that is, by screwing in and loosening the adjusting bolts, the adjustment requirements of the center of mass in all directions are met; at the same time, because the screwing in and loosening of the adjusting bolts are used, the method of adjusting the center of mass of the disc milling cutter has the advantage of convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the eccentricity fine-adjustable disc milling cutter according to an embodiment of the present invention when it is applied to a horizontal milling machine.

[0017] Figure 2It is a schematic structural diagram of the eccentricity fine-adjustable disc milling cutter according to an embodiment of the present invention at a first viewing angle.

[0018] Figure 3 It is a schematic structural diagram of the eccentricity fine-adjustable disc milling cutter according to an embodiment of the present invention at a second viewing angle.

[0019] Figure 4 It is a front view of the eccentricity fine-adjustment disc milling cutter in an initial state according to an embodiment of the present invention.

[0020] Figure 5 for Figure 4 AA section view.

[0021] Figure 6 It is a schematic structural diagram of the eccentricity fine-adjustment disc milling cutter during the adjustment process according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic structural diagram of the eccentricity fine-adjustment disc milling cutter after adjustment according to an embodiment of the present invention.

[0023] Figure 8 It is a schematic diagram of the exploded structure of the eccentricity fine-adjusting disc milling cutter according to an embodiment of the present invention.

[0024] in: 110, frame, 120, workbench, 130, reduction motor, 140, eccentricity micro-adjustment disc milling cutter; 200, base, 210, accommodating chamber, 220, pressure regulating chamber, 230, connecting screw sleeve, 240, milling cutter body; 310, pressure regulating piston, 320, adjusting bolt; 410, pressure regulating plate, 411, plug, 420, first adjusting handle, 421, clamp, 422, handle, 430, second adjusting handle; 500, a sealing tray, 510, a second spring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] In the embodiment of the present invention, an eccentricity micro-adjustable disc milling cutter is applied to a horizontal milling machine, such as Figure 1 As shown, the horizontal milling machine includes a frame 110, a workbench 120 and a reduction motor 130, wherein a slide extending forward and backward is provided on the frame 110, the workbench 120 is provided on the frame 110 in front of the slide, and the lower side thereof is connected to a lifting mechanism; and a column connected to the slide and movable forward and backward is also provided on the frame 110, and a reduction motor 130 with downward output is provided on the column, the output end of the reduction motor 130 is connected to the main shaft of the horizontal milling machine, and the lower end of the main shaft is connected to the eccentricity fine-adjustment disc milling cutter 140 of the embodiment of the present invention, so that the eccentricity fine-adjustment disc milling cutter 140 can rotate at a high speed to perform milling operation on the workpiece clamped on the workbench 120. When the horizontal milling machine uses the above structure, or other structures known in the art (such as a horizontal milling machine in which the eccentricity fine-adjusting disc milling cutter 140 performs active motion and the worktable 120 is stationary), the eccentricity fine-adjusting disc milling cutter 140 of the present invention can be adapted and achieve the purpose of the present invention. The structure of the eccentricity fine-adjusting disc milling cutter 140 of the present invention is specifically described below.

[0029] like Figure 2-5 and Figure 8As shown, the eccentricity fine-adjustable disc milling cutter 140 of the present invention includes a base 200 for connecting to the lower end of the main shaft of a horizontal milling machine, a receiving chamber 210 and a pressure regulating chamber 220 communicating with the top surface of the receiving chamber 210 are defined in the base 200, there are multiple pressure regulating chambers 220, and they are spaced apart in the circumferential direction of the base 200, each pressure regulating chamber 220 is communicated with the receiving chamber 210 to form a communicating vessel structure, the communicating vessel structure is filled with hydraulic medium, and a pressure regulating piston 310 is provided in each pressure regulating chamber 220 to slide up and down and seal, an adjusting bolt 320 is abutted above the pressure regulating piston 310, after the adjusting bolt 320 is screwed in, the pressure regulating piston 310 is squeezed, and the liquid level of the hydraulic medium in the corresponding pressure regulating chamber 220 is pressed down by the pressure regulating piston 310; and after the adjusting bolt 320 is loosened, the liquid level of the hydraulic medium in the corresponding pressure regulating chamber 220 pushes the pressure regulating piston 310 upward.

[0030] When the eccentricity fine adjustment disc milling cutter 140 of the present invention is in the initial state, as shown in FIG. Figure 5 As shown, the hydraulic medium is in a balanced state in the communicating vessel, that is, the liquid level of the hydraulic medium in each pressure regulating chamber 220 is in a horizontal plane, so that each pressure regulating piston 310 is coplanar; Figure 6 As shown, when the center of mass of the eccentricity fine-tuning disc milling cutter 140 of the present invention needs to be adjusted, the pressure-regulating piston 310 is pushed or retreated by adjusting the bolt 320, so that each pressure-regulating piston 310 is in a different horizontal plane, that is, staggered from each other in the up and down directions, so that the center of mass of the hydraulic medium in the accommodating chamber 210 changes, thereby slightly adjusting the center of mass of the eccentricity fine-tuning disc milling cutter 140 of the present invention.

[0031] Since the hydraulic medium has the characteristics of stability (having stable physical and chemical properties, not easy to oxidize, decompose and deteriorate), viscosity (having appropriate viscosity to ensure the formation of a good lubricating film and transmission pressure in the system), incompressibility, thermal conductivity (having good thermal conductivity to avoid excessive heat generation in the system), corrosion resistance (having good corrosion resistance to ensure that the components of the hydraulic system are not corroded), etc., it will be better suitable for milling operations, and at the same time, it can better achieve the purpose of the invention (i.e., simply and conveniently change the eccentricity to fine-tune the center of mass of the disc milling cutter 140). In some embodiments, the hydraulic medium can be selected from mineral oil, synthetic liquid (including synthetic esters, synthetic hydrocarbons, etc., with high temperature stability and pressure resistance), water-based liquid (such as water, ethylene glycol aqueous solution, etc., which are often used in certain special environments and have environmental protection performance), bio-based hydraulic oil (made from plant oil or animal oil, with good biodegradability and environmental protection performance), others (some special hydraulic media, such as liquid carbon dioxide and liquid gas, are also used as hydraulic media under certain circumstances).

[0032] Hydraulic medium is used as the pressure transmission medium of the communicating vessel structure in the base 200, and the hydraulic medium has good fluidity and incompressible characteristics, so that the descending amount of the pressure regulating piston 310 in one pressure regulating chamber 220 can be transmitted in the form of pressure transmission and converted into the ascending amount of the pressure regulating piston 310 in other pressure regulating chambers 220, thereby realizing the adjustment of the center of mass of the eccentricity fine-tuning disc milling cutter 140 in a linkage control manner, that is, by screwing in and loosening the adjusting bolt 320, the adjustment demand of the center of mass of the eccentricity fine-tuning disc milling cutter 140 in all directions is met; at the same time, because the screwing in and loosening of the adjusting bolt 320 is used, and each adjusting bolt 320 is linked to each other by the hydraulic medium, the method of adjusting the center of mass of the eccentricity fine-tuning disc milling cutter 140 is easy to operate.

[0033] In some preferred embodiments, the eccentricity fine-adjustment disc milling cutter 140 also includes a pressure regulating disc 410 that is always immersed in the hydraulic medium, and a first adjustment handle 420 fixed at the lower end of the pressure regulating disc 410. The pressure regulating disc 410 is located in the accommodating cavity 210, and a plurality of plugs 411 protruding upward are formed on the top of the pressure regulating disc 410. Each plug 411 corresponds to the pressure regulating cavity 220, so that each plug 411 can block the lower end opening of the corresponding pressure regulating cavity 220. The first adjustment handle 420 is fixed and extends from the lower end of the base 200 in a sliding and sealing manner. The pressure regulating disc 410 realizes the switch control of the lower end opening of the pressure regulating cavity 220 by driving the plug 411 to rise and fall. In the initial state, the pressure regulating disc 410 is in the lower working position, that is, the plug 411 is located at a certain distance from the lower end opening of the pressure regulating cavity 220 (such as Figure 5 As shown in FIG. 1 ), the pressure regulating chamber 220 and the accommodating chamber 210 are in a communicating state, forming a communicating vessel; when the eccentricity fine-adjusting disc milling cutter 140 is in a state of completing adjustment, it has been installed on the spindle of the horizontal milling machine, and the pressure regulating disc 410 is in the upper position, that is, the pressure regulating disc is pushed up until the plug 411 is inserted into the lower end opening of the pressure regulating chamber 220, and the lower end opening of the pressure regulating chamber 220 is blocked (as shown in FIG. Figure 6 As shown in the figure, the pressure regulating chamber 220 and the accommodating chamber 210 are separated. At the same time, because the pressure regulating disc is always immersed in the hydraulic medium, the volume of the hydraulic medium in the accommodating chamber 210 is basically unchanged, while the volume (also understood as weight) in each pressure regulating chamber 220 is different. Based on the different masses of the hydraulic medium in each pressure regulating chamber 220, the center of mass of the entire eccentricity fine-adjusting disc milling cutter 140 of the present invention is changed, thereby achieving the adjustment of the center of mass of the eccentricity fine-adjusting disc milling cutter 140 of the present invention. In a further preferred embodiment, handles 422 symmetrically arranged on both sides are formed at the lower end of the first adjustment handle 420 to operate the first adjustment handle 420.

[0034] In some preferred embodiments, Figures 5 to 7As shown, an annular gap is formed between the side wall of the pressure regulating plate 410 and the cavity wall of the accommodating chamber 210, so that when the pressure regulating plate 410 moves up and down, the hydraulic medium flows from one end of the pressure regulating plate 410 to the other end through the annular gap. By utilizing the transfer of the hydraulic medium between the upper and lower ends of the pressure regulating plate 410, when the pressure regulating plate is pushed up to the upper working position, as the distance between the upper end of the pressure regulating plate 410 and the upper wall of the accommodating chamber 210 decreases, the hydraulic medium is transferred to the bottom of the pressure regulating plate, and the pressure of the hydraulic medium is utilized to maintain the plug 411 in a state of sealing the lower end opening of the pressure regulating chamber 220. As some more preferred embodiments of the present invention, the pressure regulating plate 410 and the first adjustment handle 420, and even the second adjustment handle 430 described below, should all be made of lightweight materials (such as engineering plastics, rubber materials, etc.) to reduce their influence on the pressure regulating plate maintaining the upper working position.

[0035] In some preferred embodiments, a mounting hole is provided on the first adjustment handle 420, and the second adjustment handle 430 is inserted into the mounting hole in a sliding and sealing manner; and a relief opening connected to the upper end of the mounting hole is provided on the pressure regulating disk 410, so that the second adjustment handle 430 can extend from the upper end of the pressure regulating disk 410 through the relief opening. Figure 7 As shown, the second adjusting handle 430 can be pushed out from the upper end of the first adjusting handle 420, so that the second adjusting handle 430 can further occupy the space between the upper end of the pressure regulating plate 410 and the upper wall of the accommodating chamber 210, further reducing the volume of the hydraulic medium between the upper end of the pressure regulating plate 410 and the upper wall of the accommodating chamber 210, and also further reducing the contact area between the hydraulic medium and the upper plate surface of the pressure regulating plate, so that the effective area of ​​the hydraulic medium on the lower plate surface of the pressure regulating plate 410 is larger than the effective area on the lower plate surface of the pressure regulating plate, thereby prompting the pressure regulating plate 410 to be better pressed against the upper cavity wall of the accommodating chamber 210 by the hydraulic medium.

[0036] In some preferred embodiments, Figure 5-7As shown, the mounting hole has an upper hole section that is coaxially arranged and opens upward and a lower hole section that is open downward, and the aperture of the upper hole section is larger than the aperture of the lower hole section, so as to form a shrinking step between the upper hole section and the lower hole section of the mounting hole; and the second adjustment handle 430 has an upper rod section that is matched and complemented with the upper hole section of the mounting hole and slides up and down, and a lower rod section that is matched and complemented with the lower hole section of the mounting hole and slides up and down; wherein an annular protrusion that forms a circumferential seal with the upper hole section is formed on the side wall of the upper rod section, and a shoulder that surrounds the outer circumference of the lower rod section and forms an end face seal with the shrinking step is formed at the lower end of the upper rod section. The first adjustment handle 420 and the second adjustment handle 430 are combined in a circumferential face seal and an end face seal, so that the sealing path between the two is longer, and the sealing effect between the two is further improved, so that when the contact area between the hydraulic medium and the upper plate surface of the pressure regulating plate is reduced, the hydraulic medium will not leak from the gap between the two.

[0037] In some preferred embodiments of the present invention, Figure 3 As shown, the lower end of the lower rod section extends out from the lower end of the mounting hole, and the side wall of the extended section is clamped in the clamp 421. The clamp 421 includes a fixed seat fixed to the lower end of the first adjustment handle 420, and two clamp arms hinged on both sides of the fixed seat. Among them, the fixed seat is located on one side of the extended section of the lower rod section. Among them, the hinged end of the clamp arm is connected to the first spring to cause the free ends of the two clamp arms to abut against the side wall of the extended section of the lower rod section; and a damping block made of rubber material is arranged at the free end of the clamp arm, and the side wall of the damping block and the side wall of the extended section of the lower rod section are squeezed and frictionally matched. A stopper edge is formed at the end of the extended section of the lower rod section to stop below the clamp 421. By clamping the second adjustment handle 430 at the bottom of the first adjustment handle 420 with the clamp 421 with rubber damping, the first adjustment handle 420 and the second adjustment handle 430 are kept relatively fixed, and the technical effect of pulling and stopping is achieved.

[0038] In some preferred embodiments of the present invention, Figure 8 As shown, the accommodating cavity 210 is a cylindrical cavity extending up and down; the pressure regulating disk 410 is a regular hexagonal plate, and each vertex of the pressure regulating disk 410 is rounded, and the plug 411 is arranged at each vertex of the pressure regulating disk 410. By utilizing the inconsistency of the shapes of the accommodating cavity 210 and the pressure regulating disk, the annular gap between the pressure regulating disk 410 and the accommodating cavity 210 is not reduced due to assembly and manufacturing errors, thereby ensuring that the function of using hydraulic medium to push the pressure regulating disk 410 from below can be realized.

[0039] In some preferred embodiments of the present invention, Figure 7 , Figure 8As shown, the plug 411 includes a cylindrical column portion, the diameter of which is larger than the diameter of the lower opening of the pressure regulating chamber 220; and a conical cone head end is formed on the column portion for inserting into the pressure regulating chamber 220; so that when the plug 411 blocks the lower opening of the pressure regulating chamber 220, there is a gap between the upper wall of the accommodating chamber 210 and the upper wall of the pressure regulating plate 410. The gap between the upper wall of the pressure regulating plate and the upper wall of the accommodating chamber 210 is used to avoid the problem of excessive adhesion force caused by the pressure regulating plate completely fitting on the accommodating chamber 210, that is, not only the hydraulic medium should be able to squeeze the pressure regulating plate 410 upwards, but also the pressure regulating plate 410 should be conveniently pulled down in the secondary use.

[0040] In some preferred embodiments of the present invention, Figure 5-7 As shown, the eccentricity fine-adjustment disc milling cutter 140 also includes a sealing tray 500 that is slidably sealed and disposed in the accommodating chamber 210, and the lower end of the sealing tray 500 abuts against a second spring 510 disposed in the accommodating chamber 210, so as to cause the hydraulic medium to be lifted upward by the sealing tray 500. When the sealing tray 500 pushes the hydraulic medium upward, on the one hand, the volume of the accommodating chamber 210 for storing the hydraulic medium can be dynamically adjusted to reduce the amount of the hydraulic medium filled in the accommodating chamber 210; on the other hand, the hydraulic medium can be moved as far upward as possible, so that the center of mass of the eccentricity fine-adjustment disc milling cutter 140 of the present invention is adjusted as far upward as possible, closer to the spindle output end of the horizontal milling machine, and more conducive to the dynamic balance of the eccentricity fine-adjustment disc milling cutter 140.

[0041] In some preferred embodiments of the present invention, Figure 7 As shown, the lower end of the adjusting bolt 320 is spaced apart from the corresponding pressure regulating piston 310, and the friction force between the pressure regulating piston 310 and the corresponding pressure regulating chamber 220 is greater than or equal to the thrust force exerted by the hydraulic medium on the pressure regulating piston 310 at room temperature, so that when the temperature of the hydraulic medium is greater than room temperature, the pressure regulating piston 310 is pushed up by the hydraulic medium. After the adjustment of the eccentricity fine-adjusting disc milling cutter 140 of the present invention is completed, the distance between the adjusting bolt 320 and the corresponding pressure regulating piston 310 is adjusted as a pressure relief distance to prevent the hydraulic medium from exerting thermal stress on the sealing structure of the sealing tray 500 and the pressure regulating piston 310 when the hydraulic medium expands due to heat, thereby avoiding the damage of the sealing structure to the thermal stress.

[0042] As a preferred embodiment, the milling cutter body 240 is arranged at the lower part of the base 200, the base 200 is connected to the output end of the reduction motor 130 through the connecting screw sleeve 230, the accommodating chamber 210 is arranged in the middle of the base 200, and the through pressure regulating chamber 220 is arranged at the upper part of the accommodating chamber 210. The pressure regulating piston 310 is slidably arranged in the pressure regulating chamber 220, and the upper part of the pressure regulating chamber 220 is provided with a screw hole section, which can cooperate with the adjusting bolt 320; an opening is arranged through the middle part of the lower end surface of the base 200, and the first adjusting handle 420 is slidably arranged inside the accommodating chamber 210 through the opening. The upper part of the handle 420 is fixedly connected to the pressure regulating disk 410, and a mounting hole is provided in the middle of the first adjusting handle 420. The second adjusting handle 430 is slidably arranged in the mounting hole. A second spring 510 is circumferentially arranged at the bottom of the accommodating cavity 210, and the upper part of the second spring 510 is connected to the sealing tray 500. The middle part of the sealing tray 500 is open, and the first adjusting handle 420 slides relative to the sealing tray 500 through the opening; an avoidance opening is provided in the middle of the pressure regulating disk 410, and the aperture is the same as the outer circumference of the second adjusting handle 430; a plug 411 is circumferentially arranged on the pressure regulating disk 410, corresponding one-to-one to the position of the pressure regulating cavity 220.

[0043] The initial state is Figure 5 , the lower part of the adjusting bolt 320 contacts the pressure regulating piston 310, all the pressure regulating pistons 310 are located in the same horizontal plane, the plug 411 does not contact the lower part of the pressure regulating chamber 220, and the lower part of the second adjusting handle 430 abuts against the first adjusting handle 420. When the adjustment is determined (generally determined by comparing the offset with a leveling detector or a trial workpiece), the adjusting bolt 320 at the corresponding position is screwed down to move the pressure regulating piston 310 downward. Then, the liquid filling amounts in the multiple pressure regulating chambers 220 are different, which can indirectly adjust the position of the overall center of mass of the tool. After leveling, push the first adjusting handle 420 drives the pressure regulating plate 410 to move upward, so that the plug 411 blocks the pressure regulating chamber 220. In this process, the second adjusting handle 430 moves upward with the first adjusting handle 420. Because the volume of the accommodating chamber 210 decreases, the sealing tray 500 moves downward, the second spring 510 is compressed, and then the second adjusting handle 430 is pushed to move upward until it passes through the avoidance opening. The volume of the entity in the accommodating chamber 210 increases (because the upper part of the upper rod section enters the accommodating chamber 210), so that the liquid pushes the second spring 510 to continue to compress, and then the second adjusting handle 430 is clamped with a caliper to complete the leveling. Figure 7 Before starting the machine, screw the adjusting bolt 320 upward until it is disengaged from the pressure regulating piston 310, leaving space for the liquid to expand. If the liquid expands due to the heat transfer from the tool, the pressure regulating piston 310 will move upward, reducing the impact on the sealing degree of the lower plug 411.

[0044] The present invention achieves micro-adjustment of the eccentricity of the milling cutter by adjusting the amount of liquid in the pressure regulating chamber 220, so that the working process of the milling cutter is more stable. At the same time, due to the thermal expansion problem of the hydraulic medium, the heat generated by the cutter during normal processing will transfer heat to the hydraulic medium. Therefore, it is necessary to seal the pressure regulating chamber 220 after the adjustment is completed, and allow the pressure regulating piston 310 to slide freely (the purpose is to ensure that the hydraulic medium in the pressure regulating chamber 220 can relieve the expansion pressure when expanding, so as not to affect the sealing of the plug 411). The present invention can be adjusted multiple times, which increases the number of times the tool is used and the life of the tool compared to the sharpening adjustment.

[0045] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A disc milling cutter with fine adjustment of eccentricity, suitable for horizontal milling machine, characterized in that: include: A base (200) connected to the lower end of the main shaft of the horizontal milling machine, wherein a receiving chamber (210) and a pressure regulating chamber (220) communicating with the top surface of the receiving chamber (210) are defined in the base (200), wherein the pressure regulating chambers (220) are multiple and are spaced apart in the circumferential direction of the base (200), and each of the pressure regulating chambers (220) is communicated with the receiving chamber (210) to form a communicating vessel structure, wherein the communicating vessel structure is filled with a hydraulic medium, and a pressure regulating piston (310) is provided in each of the pressure regulating chambers (220) in a manner that allows for upward and downward sliding and sealing, and an adjusting bolt (320) is abutted against the pressure regulating piston (310); The adjusting bolt (320) is screwed in to squeeze the pressure regulating piston (310), thereby causing the liquid level of the hydraulic medium in the corresponding pressure regulating chamber (220) to be pressed downward by the pressure regulating piston (310); The adjusting bolt (320) is loosened to free the pressure regulating piston (310), thereby allowing the liquid level of the hydraulic medium in the corresponding pressure regulating chamber (220) to push the pressure regulating piston (310) upward.

2. The eccentricity fine-adjustable disc milling cutter according to claim 1, characterized in that: Also includes: a pressure regulating disc (410) always immersed in the hydraulic medium, the pressure regulating disc (410) being located in the accommodating cavity (210), a plurality of plugs (411) protruding upwards being formed on the top of the pressure regulating disc (410), each of the plugs (411) being distributed in a one-to-one correspondence with the pressure regulating cavity (220), so that each of the plugs (411) can seal the lower end opening of the corresponding pressure regulating cavity (220); A first adjustment handle (420) is fixed to the lower end of the pressure regulating disk (410), and the first adjustment handle (420) is non-rotatable and extends out from the lower end of the base (200) in a sliding and sealing manner.

3. The eccentricity fine-adjustable disc milling cutter according to claim 2, characterized in that: An annular gap is formed between the side wall of the pressure regulating disc (410) and the cavity wall of the accommodating cavity (210), so that when the pressure regulating disc (410) moves up and down, the hydraulic medium flows from one end of the pressure regulating disc (410) to the other end through the annular gap.

4. The eccentricity fine-adjustable disc milling cutter according to claim 3, characterized in that: The first adjustment handle (420) is provided with a mounting hole extending vertically therethrough, and the second adjustment handle (430) is inserted into the mounting hole in a sliding and sealing manner up and down; and the pressure regulating disk (410) is provided with an escape opening connected to the upper end opening of the mounting hole, so that the second adjustment handle (430) can extend from the upper end of the pressure regulating disk (410) through the escape opening.

5. The eccentricity fine-adjustable disc milling cutter according to claim 4, characterized in that: The mounting hole has an upper hole section opening upward and a lower hole section opening downward, which are coaxially arranged, and the aperture of the upper hole section is larger than the aperture of the lower hole section, so that an upward shrinking step is formed at the transition between the upper hole section and the lower hole section of the mounting hole; as well as: The second adjustment handle (430) comprises an upper rod section that is slidably plugged in and out of the upper hole section of the mounting hole in a complementary manner, and a lower rod section that is slidably plugged in and out of the lower hole section of the mounting hole in a complementary manner; wherein an annular protrusion is formed on the side wall of the upper rod section to form a circumferential seal with the upper hole section, and a shaft shoulder is formed at the lower end of the upper rod section to surround the outer circumference of the lower rod section and to form an end face seal with the shrinking step.

6. The eccentricity fine-adjustable disc milling cutter according to claim 5, characterized in that: The lower end of the lower rod section protrudes from the lower end of the mounting hole, and the side wall of the protruding section is clamped in a clamp (421); wherein the clamp (421) comprises: A fixing seat fixed to the lower end of the first adjustment handle (420), the fixing seat being located on one side of the extended section of the lower rod section; Two clamp arms are hinged on both sides of the fixing seat, and the hinged ends of the clamp arms are connected to abut against a first spring, so as to cause the free ends of the two clamp arms to abut against the side walls of the extended section of the lower rod section; and a damping block made of rubber is arranged at the free end of the clamp arm, and the side wall of the damping block is squeezed and frictionally matched with the side wall of the extended section of the lower rod section; and: A stop flange is formed at the end of the extended section of the lower rod section and is stopped below the clamp (421).

7. The eccentricity fine-adjustable disc milling cutter according to claim 3, characterized in that: The accommodating cavity (210) is a cylindrical cavity extending up and down; the pressure regulating disk (410) is a regular hexagonal plate, and each vertex of the pressure regulating disk (410) is rounded, and the plug (411) is arranged at each vertex of the pressure regulating disk (410).

8. The eccentricity fine-adjustable disc milling cutter according to claim 2, characterized in that: The plug (411) comprises a cylindrical column portion, the diameter of which is larger than the diameter of the lower opening of the pressure regulating chamber (220); and a conical cone head end is formed on the column portion for inserting into the pressure regulating chamber (220); as well as: When the plug (411) blocks the lower opening of the pressure regulating chamber (220), there is a distance between the upper wall of the accommodating chamber (210) and the upper plate wall of the pressure regulating plate (410).

9. The eccentricity fine-adjustable disc milling cutter according to claim 1, characterized in that: Also includes: A sealing tray (500) is arranged in the accommodating cavity (210) in a manner of sliding and sealing up and down, and the lower end of the sealing tray (500) abuts against a second spring (510) in the accommodating cavity (210) to cause the hydraulic medium to be lifted upward by the sealing tray (500).

10. The eccentricity fine-adjustable disc milling cutter according to claim 9, characterized in that: The lower end of the adjusting bolt (320) is spaced apart from its corresponding pressure regulating piston (310) in the up-down direction, and the friction force between the pressure regulating piston (310) and its corresponding pressure regulating chamber (220) is greater than or equal to the thrust force applied by the hydraulic medium on the pressure regulating piston (310) at room temperature, so that the pressure regulating piston (310) is pushed upward by the hydraulic medium when the temperature of the hydraulic medium is greater than room temperature.

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