Milling reamer for finish machining

Abstract

The utility model discloses a milling reamer for finish machining, which relates to the technical field of metal processing and comprises a twisted cutter bar, a cutter handle and a piston column, the cutter handle and the piston column are fixed at the tail of the cutter bar, a milling and reaming groove is arranged at the head of the cutter bar, a chip groove is arranged on the outer side of the cutter bar, mutually communicated sliding grooves are arranged in the cutter bar and the cutter handle, and the piston column is slidably arranged in the sliding grooves. An oil storage chamber is arranged in the cutter handle, a communicating groove is formed in the side, close to the cutter bar, of the oil storage chamber, a plurality of oil passing grooves are formed in the cutter bar, the oil passing grooves are communicated with the communicating groove, and oil discharging holes are formed in the side faces of the oil passing grooves and penetrate through the outer side of the cutter bar. And the lubricating oil enters the oil passing groove through extrusion and is finally discharged to the cutting position of the cutter bar through the oil discharging hole to lubricate the outer side of the cutter bar, and abrasion generated when the cutter bar is drilled is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to a milling reamer used for fine processing. Background Art

[0002] A milling reamer is needed when machining cylindrical holes.

[0003] The drilling tool disclosed in publication number CN219402466U comprises a shank and a working portion disposed at the front end of the shank, wherein the front end of the working portion comprises a centering drill tip located on the central axis and a side drill tip circumferentially disposed outside the centering drill tip;

[0004] When the above device is in use, the tool rod is in direct contact with the metal original for drilling, lacks protection, and wears out quickly. At the same time, the high temperature generated by the tool rod during drilling will further accelerate the wear of the tool rod. Therefore, we propose a milling reamer for fine machining. Utility Model Content

[0005] In response to the deficiencies in the prior art, the utility model provides a milling reamer for fine machining. During the drilling process, the heat generated causes the gas in the slide groove to expand, pushing the piston rod toward the oil storage chamber, thereby squeezing the lubricating oil in the oil storage chamber. The lubricating oil is squeezed into the oil groove and finally discharged from the oil discharge hole to the cutting part of the tool rod, lubricating the outer side of the tool rod and reducing the wear of the tool rod during drilling.

[0006] In order to solve the above technical problems, the present invention solves the problem in the prior art that milling reamers lack protection and wear quickly during drilling and cutting through the following technical solutions.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A milling reamer for fine machining comprises a twisted tool rod, a tool handle fixed to the tail of the tool rod, and a piston column; a milling reamer groove is provided at the head of the tool rod, a chip removal groove is provided at the outer side of the tool rod, a slide groove communicating with each other is provided in the tool rod and the tool handle, the piston column slides in the slide groove, an oil storage chamber is provided in the tool handle, a connecting groove is provided on the side of the oil storage chamber close to the tool rod, a plurality of oil grooves are provided in the tool rod, the oil grooves are connected to the connecting grooves, an oil drainage hole is provided on the side of the oil groove, and the oil drainage hole passes through the outer side of the tool rod.

[0009] Preferably, the oil drain hole is arranged obliquely, and the end of the oil drain hole close to the head of the cutter rod is located in the oil groove, and the end of the oil drain hole close to the tail of the cutter rod is located outside the cutter rod.

[0010] Preferably, the outer end of the oil drain hole is located inside the chip discharge groove.

[0011] Preferably, an annular block is fixed in the connecting groove, the annular block is provided with evenly distributed oil distribution holes, the oil distribution holes are provided with mounting grooves, the mounting grooves are provided with fixing beads, and the fixing beads are against the inner side of the mounting groove close to the oil storage chamber.

[0012] Preferably, a compression spring is provided in the mounting groove, and the compression spring is fixedly arranged on the outside of the fixing bead.

[0013] Preferably, a baffle is fixedly provided in the mounting groove, one end of the compression spring away from the fixing bead is fixed to the baffle, and evenly distributed auxiliary holes are provided on the outer side of the baffle.

[0014] Preferably, the outer diameter of the fixing bead is larger than the inner diameter of the oil separation hole.

[0015] Preferably, the piston column is engaged with the interior of the slide groove, and the length of the piston column is greater than the depth of the oil storage chamber.

[0016] Preferably, an oil filling hole is provided at the tail end of the handle.

[0017] Preferably, a tapered groove is provided on one side of the oil distribution hole close to the oil storage chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] During the drilling process, the heat generated by the utility model causes the gas in the slide groove to expand, pushing the piston rod toward the oil storage chamber, thereby squeezing the lubricating oil in the oil storage chamber. The lubricating oil is squeezed into the oil groove and finally discharged from the oil discharge hole to the cutting part of the tool rod, lubricating the outer side of the tool rod and reducing the wear of the tool rod during drilling.

[0020] The lubricating oil is discharged to the cutting edge of the milling reamer through the oil drain hole, which can not only lubricate the cutting area but also reduce the temperature during cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the utility model from another perspective;

[0024] Figure 3 This is a schematic cross-sectional view of the overall structure of the utility model;

[0025] Figure 4This is a schematic diagram of the internal structure of the handle of the utility model;

[0026] Figure 5 This is a partial cross-sectional view of the internal structure of the handle of the utility model;

[0027] Figure 6 This is a schematic diagram of the oil drain hole structure of the utility model;

[0028] Figure 7 for Figure 5 Enlarged view of point A in the middle.

[0029] Explanation of the figure numbers: 1. Tool bar; 2. Tool handle; 3. Milling groove; 4. Chip removal groove; 5. Piston rod; 6. Slide groove; 7. Oil storage chamber; 8. Connecting groove; 9. Oil flow groove; 10. Oil drain hole; 11. Ring block; 12. Oil distribution hole; 13. Mounting groove; 14. Fixing bead; 15. Compression spring; 16. Baffle; 17. Auxiliary hole; 18. Oil filling hole; 19. Tapered groove. DETAILED DESCRIPTION

[0030] The present invention is described in further detail below with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or gear element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0033] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0034] Example:

[0035] See also Figure 1-Figure 7A milling reamer for finishing includes a twisted tool bar 1, a tool handle 2 fixed to the tail of the tool bar 1, and a piston rod 5. The head of the tool bar 1 is provided with a milling reamer groove 3, the outer side of the tool bar 1 is provided with a chip removal groove 4, the tool bar 1 and the tool handle 2 are provided with a mutually connected slide groove 6, the piston rod 5 is slidably arranged in the slide groove 6, the tool handle 2 is provided with an oil storage chamber 7, the piston rod 5 is embedded in the slide groove 6, the length of the piston rod 5 is greater than the depth of the oil storage chamber 7, to prevent the piston rod 5 from falling into the oil storage chamber 7;

[0036] An oil filling hole 18 is provided at the tail of the shank 2. Oil is filled into the oil storage chamber 7 through the oil filling hole 18 before use. A connecting groove 8 is provided on the side of the oil storage chamber 7 close to the arbor 1. A plurality of oil grooves 9 are provided in the arbor 1. The oil grooves 9 are connected to the connecting grooves 8. An oil drain hole 10 is provided on the side of the oil groove 9. The oil drain hole 10 passes through the outside of the arbor 1. The oil drain hole 10 is tilted. The end of the oil drain hole 10 close to the head of the arbor 1 is located in the oil groove 9, and the end of the oil drain hole 10 close to the tail of the arbor 1 is located on the outside of the arbor 1. The oil drain hole 10 designed in this way can prevent the debris generated by cutting from entering the oil drain hole 10 and clogging the oil drain hole 10 when passing through the chip groove 4. Furthermore, the outer end of the oil drain hole 10 is located on the inner side of the chip groove 4, and the discharge direction of the oil in the oil drain hole 10 is opposite to the direction of rotation of the arbor 1, so as to avoid flushing the cutting hole when the oil is discharged.

[0037] Some embodiments of the present application are described in detail below with reference to the accompanying drawings:

[0038] See also Figure 1-Figure 7 During the drilling process, the heat generated will cause the gas in the slide groove 6 to expand, pushing the piston rod 5 toward the oil storage chamber 7, thereby squeezing the lubricating oil in the oil storage chamber 7. The lubricating oil is squeezed into the oil groove 9 and finally discharged from the oil drain hole 10 to the cutting part of the tool rod 1, lubricating the outside of the tool rod 1 and reducing the wear of the tool rod 1 during drilling.

[0039] Among them, a ring block 11 is fixed in the connecting groove 8, and an evenly distributed oil distribution hole 12 is provided in the ring block 11. A mounting groove 13 is provided in the oil distribution hole 12, and a fixed bead 14 is provided in the mounting groove 13. The fixed bead 14 is against the inner side of the mounting groove 13 close to the oil storage chamber 7. The outer diameter of the fixed bead 14 is larger than the inner diameter of the oil distribution hole 12, which can completely block the oil distribution hole 12 and limit the passage of oil. A compression spring 15 is provided in the mounting groove 13, and the compression spring 15 is fixed on the outside of the fixed bead 14. The mounting groove 13 is fixed with a baffle 16, and the end of the compression spring 15 away from the fixed bead 14 is fixed to the baffle 16. A tapered groove 19 is provided on the side of the oil separation hole 12 close to the oil storage chamber 7. When the oil in the oil storage chamber 7 is squeezed into the oil separation hole 12, due to the presence of the tapered groove 19, the oil can be accelerated through the oil separation hole 12, and the oil pressure in the oil separation hole 12 increases faster. Evenly distributed auxiliary holes 17 are provided on the outside of the baffle 16. The auxiliary holes 17 are designed to allow the oil to pass through the mounting groove 13 smoothly.

[0040] The following describes the process of lubricating the tool bar 1 with lubricating oil:

[0041] First, the tool bar 1 rotates, and the milling groove 3 is used to open a circular groove on the metal original. As the tool bar 1 continues to rotate, the milling groove 3 penetrates into the metal original. During the drilling process, the chips are discharged by the chip discharge groove 4;

[0042] During the drilling process, a large amount of heat is generated, which is transferred to the inside of the tool bar 1, causing the gas in the slide groove 6 to expand. The expanded gas pushes the piston rod 5 toward the oil storage chamber 7, thereby squeezing the lubricating oil in the oil storage chamber 7. The lubricating oil is squeezed into the oil groove 9 through the connecting groove 8 and finally discharged from the oil discharge hole 10 to the cutting part of the tool bar 1, lubricating the outside of the tool bar 1 and reducing the wear of the tool bar 1 during drilling.

[0043] It is worth noting that the lubricating oil wrapped around the outside of the tool rod 1 can also reduce the temperature of the drilling position of the tool rod 1, thereby preventing the tool rod 1 from being damaged by high temperature and extending the service life of the tool rod 1.

[0044] When the lubricating oil passes through the connecting groove 8, the lubricating oil is first pressed into the oil separation hole 12. The oil presses against the fixed bead 14 in the oil separation hole 12, pushing the fixed bead 14 away from the oil separation hole 12, allowing the oil to enter the mounting groove 13 and then pass through the entire annular block 11.

[0045] When the oil in the oil storage chamber 7 is no longer squeezed, the fixed bead 14 is pressed against the inner side of the oil separation hole 12 under the action of the compression spring 15, thereby blocking the oil separation hole 12 and preventing the oil from entering the mounting groove 13 again, thereby preventing the oil in the oil storage chamber 7 from leaking when not in use.

[0046] In the implementation of the present technical solution, the design of the annular block 11 and the oil distribution hole 12 can reduce the amount of oil entering the oil drain hole 10 per unit time, thereby avoiding excessive oil discharge to the outside of the tool rod 1 affecting the normal milling and reaming operation of the tool rod 1.

[0047] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles.

Claims

1. A milling reamer for finishing, comprising: A twisted tool rod (1) and a tool handle (2) fixed to the tail of the tool rod (1); a milling groove (3) is provided at the head of the tool rod (1); and a chip removal groove (4) is provided on the outer side of the tool rod (1); It is characterized by further comprising: A piston column (5) is provided in the tool rod (1) and the tool handle (2), wherein a slide groove (6) is connected to each other, and the piston column (5) is slidably provided in the slide groove (6). An oil storage chamber (7) is provided in the tool handle (2), and a connecting groove (8) is provided on the side of the oil storage chamber (7) close to the tool rod (1). A plurality of oil grooves (9) are provided in the tool rod (1), and the oil grooves (9) are connected to the connecting grooves (8). An oil drain hole (10) is provided on the side of the oil groove (9), and the oil drain hole (10) passes through the outer side of the tool rod (1).

2. A milling reamer for finishing according to claim 1, characterized in that: The oil drain hole (10) is arranged at an angle, and one end of the oil drain hole (10) close to the head of the tool rod (1) is located in the oil groove (9), and one end of the oil drain hole (10) close to the tail of the tool rod (1) is located outside the tool rod (1).

3. A milling reamer for finishing according to claim 2, characterized in that: The outer end of the oil discharge hole (10) is located inside the chip discharge groove (4).

4. A milling reamer for finishing according to claim 2, characterized in that: An annular block (11) is fixedly provided in the communicating groove (8), and evenly distributed oil distribution holes (12) are provided in the annular block (11). A mounting groove (13) is provided in the oil distribution hole (12), and a fixing bead (14) is provided in the mounting groove (13). The fixing bead (14) abuts against the inner side of the mounting groove (13) near the oil storage chamber (7).

5. A milling reamer for finishing according to claim 4, characterized in that: A compression spring (15) is provided in the installation groove (13), and the compression spring (15) is fixedly arranged on the outside of the fixing bead (14).

6. A milling reamer for finishing according to claim 5, characterized in that: A baffle (16) is fixedly provided in the installation groove (13), one end of the compression spring (15) away from the fixing bead (14) is fixed to the baffle (16), and evenly distributed auxiliary holes (17) are provided on the outside of the baffle (16).

7. The milling reamer for finishing according to claim 4, characterized in that: The outer diameter of the fixing bead (14) is larger than the inner diameter of the oil separation hole (12).

8. The milling reamer for finishing according to claim 1, characterized in that: The piston column (5) is embedded in the sliding groove (6), and the length of the piston column (5) is greater than the depth of the oil storage chamber (7).

9. The milling reamer for finishing according to claim 1, characterized in that: An oil filling hole (18) is provided at the tail of the knife handle (2).

10. The milling reamer for finishing according to claim 4, characterized in that: A tapered groove (19) is provided on one side of the oil distribution hole (12) close to the oil storage chamber (7).

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