Lollipop broaching milling cutter

Abstract

The utility model belongs to the technical field of milling cutters, and discloses a lollipop broaching milling cutter. The lollipop broaching milling cutter comprises a cutter handle, a circular truncated cone is arranged at one end of the cutter handle, a cutter bar is arranged at the end, away from the cutter handle, of the circular truncated cone, a spherical cutter head is integrally formed at the end, away from the circular truncated cone, of the cutter bar, and an arc cutting edge is arranged on the surface of the spherical cutter head. The diameter of the spherical tool bit is gradually decreased from the middle to the two sides, when a small reserved hole is machined, the end, away from the tool handle, of the spherical tool bit enters the reserved hole, and when the drive tool drives the tool handle, the tool bar and the spherical tool bit to rotate, the arc cutting edge conducts chambering machining on the small reserved hole; the tedious operation that in the prior art, a plurality of milling cutters need to be used for machining small reserved holes is omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a lollipop hole enlarging milling cutter. Background Art

[0002] A milling cutter is a rotary tool with one or more teeth used for milling. Each tooth cuts off the excess of the workpiece intermittently in sequence during operation. Milling cutters are mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines. Hole expansion milling cutters are required when expanding holes.

[0003] When the milling cutter is used in the processing of aluminum alloy parts for aircraft fuselage, the reserved holes on the aluminum alloy parts for aircraft fuselage are relatively small. When processing the smaller reserved holes, the existing technology uses electric tools in combination with drills, rough milling with reaming cutters, fine milling with reaming cutters, rough reaming with reaming cutters, fine reaming with reaming cutters, and internal grinding for processing. The disadvantage of this process is that too many types and specifications of tools are required, and the processing efficiency is relatively slow. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a lollipop hole enlarging milling cutter.

[0005] The above technical purpose of the utility model is achieved through the following technical scheme: a lollipop reaming milling cutter, including a handle, a frustum body is provided at one end of the handle, a tool rod is provided at the end of the frustum body away from the handle, a spherical cutter head is integrally formed at the end of the tool rod away from the frustum body, and a circular arc blade is provided on the surface of the spherical cutter head.

[0006] By adopting the above technical solution, the diameter of the spherical cutter head decreases from the middle to both sides. When processing a smaller reserved hole, the end of the spherical cutter head away from the tool handle enters the reserved hole. When the driving tool drives the tool handle, tool rod and spherical cutter head to rotate, the arc blade expands the smaller reserved hole, eliminating the tedious operation of using multiple milling cutters to process smaller reserved holes in traditional technology.

[0007] Furthermore, a sliding groove that is plugged into the knife rod is provided through the side wall of the frustum body close to the knife rod, a connecting component is provided between the frustum body and the knife rod, a receiving groove is provided on the side wall of the knife rod away from the spherical cutter head, the connecting component includes a spring fixed to the inner wall of the receiving groove and a limiting ball fixed to the free end of the spring, the limiting ball is slidably matched with the receiving groove, and a limiting groove connected to the sliding groove and matched with the limiting ball is provided in the frustum body.

[0008] By adopting the above technical solution, when the cutter head needs to be replaced, the staff only needs to hold the cutter rod and the handle and pull them in two directions. At this time, the limit ball is subjected to the pressure of the inner wall of the limit groove, shrinks into the accommodating groove and squeezes the spring, and then the cutter rod slides outward along the slide groove, thereby completing the disassembly of the spherical cutter head, so that the staff can replace spherical cutter heads of different sizes or replace spherical cutter heads with damaged arc blades.

[0009] Furthermore, the connection assembly also includes a clamping block fixedly connected to one end of the knife rod close to the truncated cone body, and one end of the knife handle close to the truncated cone body is provided with a clamping groove plug-fitted with the clamping block.

[0010] By adopting the above technical solution, the clamping block is clamped and fitted in the clamping groove, which is beneficial to improving the stability of the connection between the tool rod and the tool handle.

[0011] Furthermore, the tool rod is sleeved with an outer sleeve that cooperates with the tool rod, and the end of the truncated cone body away from the tool handle is fixed with an inner sleeve sleeved on the outside of the tool rod, and the inner side of the outer sleeve is threadedly connected with the outer side of the inner sleeve, and the inner diameter of the end of the outer sleeve away from the spherical cutter head is larger than the inner diameter of the end of the outer sleeve close to the spherical cutter head.

[0012] By adopting the above technical solution, after tightening the outer sleeve, the outer sleeve and the inner sleeve are pressed against one end close to the spherical cutter head, thereby enhancing the stability of the connection between the cutter rod and the frustum, thereby improving the stability of the spherical cutter head during use.

[0013] Furthermore, there are a plurality of circular arc blades, and the plurality of circular arc blades are evenly distributed about the axis of the blade rod.

[0014] By adopting the above technical solution, the entire arc blade is used for cutting. For through holes with a depth less than 1 times the diameter, the three axes of the machine tool are linked to feed the tool at an oblique angle. Even if there is not enough space reserved at the installation position, the tool can still be fed.

[0015] Furthermore, the side wall of the circular arc blade is provided with chip removal grooves having the same number as the circular arc blade, and the extending direction of the chip removal grooves is spiral.

[0016] Through the above technical solution, it is convenient for the chip removal groove to discharge the debris generated during the processing, which is beneficial for the staff to use the hole expansion milling cutter to expand the workpiece.

[0017] Furthermore, a rubber gasket is arranged in the card slot.

[0018] By adopting the above technical solution, the wear of the clamping block on the clamping slot is reduced, which is beneficial to extending the service life of the tool handle.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. In the present application, the diameter of the spherical cutter head decreases from the middle to both sides. When processing a smaller reserved hole, the spherical cutter head moves away from one end of the tool handle and enters the reserved hole. When the driving tool drives the tool handle, tool rod and spherical cutter head to rotate, the arc blade expands the smaller reserved hole, eliminating the cumbersome operation of using multiple milling cutters to process the smaller reserved hole in the traditional technology;

[0021] 2. In this application, when the cutter head needs to be replaced, the staff only needs to hold the cutter rod and the handle and pull them in two directions. At this time, the limiting ball is subjected to the pressure of the inner wall of the limiting groove, shrinks into the receiving groove and squeezes the spring, and then the cutter rod slides outward along the slide groove, thereby completing the removal of the spherical cutter head, so that the staff can replace the spherical cutter head of different sizes or replace the spherical cutter head with a damaged arc blade;

[0022] 3. In this application, the entire arc blade is used for cutting. For through holes with a depth less than 1 times the diameter, the three axes of the machine tool are linked to feed the tool at an oblique angle. Even if there is not enough space reserved at the installation location, the tool can still be fed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the plane structure of the utility model;

[0024] Figure 2 yes Figure 1 Left view of

[0025] Figure 3 It is a cross-sectional structural schematic diagram used to highlight the connection components of the utility model;

[0026] Figure 4 yes Figure 3 Explosion diagram.

[0027] In the figure: 1, tool handle; 11, slot; 111, rubber gasket; 2, truncated cone; 21, slide groove; 22, limit groove; 23, inner sleeve; 3, tool rod; 31, receiving groove; 32, outer sleeve; 4, spherical tool head; 41, arc blade; 42, chip removal groove; 5, connecting assembly; 51, spring; 52, limit ball; 53, block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0029] like Figure 1-4As shown, an embodiment of the present application discloses a lollipop hole reaming milling cutter, including a handle 1, a frustum body 2, a tool rod 3, a spherical cutter head 4, an arc blade 41 and a connecting assembly 5.

[0030] The handle 1 is made of hard alloy and has good structural strength. The truncated cone body 2 is fixed to one end of the handle 1 , and a slide groove 21 is provided through the side wall of the truncated cone body 2 near the shank 3 , and a limit groove 22 connected to the slide groove 21 is also provided in the truncated cone body 2 .

[0031] One end of the shank 3 is plugged into the slide groove 21, and the spherical cutter head 4 is fixedly connected to the end of the shank 3 away from the truncated cone body 2. A receiving groove 31 is provided on the side wall of the shank 3 away from the spherical cutter head 4, and a clamping groove 11 is provided on the end of the shank 1 close to the truncated cone body 2.

[0032] The arc blade 41 is arranged on the spherical cutter head 4, and the number of the arc blades 41 is several and evenly distributed about the axis of the cutter bar 3. In this embodiment, the entire arc blade 41 is used for cutting, and for through holes with a depth less than 1 times the diameter, the three axes of the machine tool are linked to feed at an oblique angle, so that the tool can still be fed even if there is not enough space reserved at the installation location.

[0033] In order to facilitate the chip removal groove 42 to discharge the debris generated during the processing, the side wall of the arc blade 41 is provided with chip removal grooves 42 with the same number as the arc blade 41, which is convenient for the staff to use the reaming milling cutter to reame the workpiece.

[0034] The connecting assembly 5 is used to detachably connect the truncated cone body 2 and the shank 3, so as to facilitate the replacement of the spherical cutter head 4 of different sizes. The connecting assembly 5 includes a spring 51, a limiting ball 52 and a clamping block 53. The spring 51 is fixed to the inner wall of the receiving groove 31, and the limiting ball 52 is fixedly connected to the free end of the spring 51. The limiting ball 52 is slidably matched with the receiving groove 31 and is clamped with the limiting groove 22. The clamping block 53 is fixedly connected to one end of the shank 3 close to the truncated cone body 2 and is plugged with the clamping groove 11. The spring 51, the limiting ball 52, the receiving groove 31 and the limiting groove 22 are all symmetrically arranged about the axis of the shank 3, and there are two groups of them, which is conducive to enhancing the stability of the connection between the shank 3 and the handle 1.

[0035] In order to further enhance the stability of the connection between the shank 3 and the truncated cone body 2, an outer sleeve 32 matching the shank 3 is sleeved on the shank 3, and an inner sleeve 23 sleeved on the outside of the shank 3 is fixed to the end of the truncated cone body 2 away from the handle 1. The inner side of the outer sleeve 32 is threadedly connected to the outer side of the inner sleeve 23, and the inner diameter of the end of the outer sleeve 32 away from the spherical cutter head 4 is larger than the inner diameter of the end of the outer sleeve 32 close to the spherical cutter head 4. In this embodiment, the staff can tighten the outer sleeve 32, and the outer sleeve 32 and the end of the inner sleeve 23 close to the spherical cutter head 4 are pressed tightly, which enhances the stability of the connection between the shank 3 and the truncated cone body 2, thereby improving the stability of the spherical cutter head 4 during use.

[0036] In order to reduce the wear of the block 53 on the slot 11, a rubber gasket 111 is provided in the slot 11. The rubber gasket 111 is made of a rubber material with good elastic properties, so that the end of the block 53 away from the spherical cutter head 4 is flexibly connected to the side of the slot 11 away from the spherical cutter head 4, which is beneficial to prolonging the service life of the tool handle 1.

[0037] The use principle of a lollipop hole-reaming milling cutter in the present embodiment is as follows: when the cutter head needs to be replaced, the staff only needs to hold the cutter rod 3 and the handle 1 and pull them in two directions. At this time, the limiting ball 52 is subjected to the pressure of the inner wall of the limiting groove 22, shrinks into the accommodating groove 31 and squeezes the spring 51, and then the cutter rod 3 slides outward along the slide groove 21, thereby completing the disassembly of the spherical cutter head 4, so that the staff can replace the spherical cutter heads 4 of different sizes or replace the spherical cutter heads 4 with damaged arc blades 41. During the hole reaming work, the diameter of the spherical cutter head 4 decreases from the middle to both sides. When processing a smaller reserved hole, the end of the spherical cutter head 4 away from the handle 1 enters the reserved hole. When the driving tool drives the handle 1, the cutter rod 3 and the spherical cutter head 4 to rotate, the arc blade 41 expands the smaller reserved hole, eliminating the cumbersome operation of using multiple milling cutters to process smaller reserved holes in traditional technology.

[0038] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A lollipop hole reaming milling cutter, comprising a handle (1), Its characteristics are: A truncated cone (2) is fixed to one end of the knife handle (1); a knife rod (3) is arranged at the end of the truncated cone (2) away from the knife handle (1); a spherical knife head (4) is arranged at the end of the knife rod (3) away from the truncated cone (2); and a circular arc blade (41) is arranged on the surface of the spherical knife head (4).

2. A lollipop reaming cutter according to claim 1, Its characteristics are: A sliding groove (21) which is plugged into and fits with the knife rod (3) is provided through the side wall of the truncated cone (2) close to the knife rod (3); a connecting assembly (5) is provided between the truncated cone (2) and the knife rod (3); a receiving groove (31) is provided on the side wall of the knife rod (3) away from the spherical cutter head (4); the connecting assembly (5) comprises a spring (51) fixed to the inner wall of the receiving groove (31) and a limiting ball (52) fixed to the free end of the spring (51); the limiting ball (52) is slidably fitted with the receiving groove (31); a limiting groove (22) which is connected to the sliding groove (21) and fits with the limiting ball (52) is provided in the truncated cone (2).

3. A lollipop hole reaming cutter according to claim 2, Its characteristics are: The connecting assembly (5) further comprises a clamping block (53) fixed to one end of the knife rod (3) close to the truncated cone body (2); and a clamping groove (11) for plugging and cooperating with the clamping block (53) is provided on one end of the knife handle (1) close to the truncated cone body (2).

4. A lollipop hole reaming cutter according to claim 3, Its characteristics are: The knife rod (3) is sleeved with an outer sleeve (32) matched with the knife rod (3); an inner sleeve (23) sleeved on the outside of the knife rod (3) is fixed to the end of the truncated cone (2) away from the knife handle (1); the inner side of the outer sleeve (32) is threadedly connected to the outer side of the inner sleeve (23); the inner diameter of the end of the outer sleeve (32) away from the spherical cutter head (4) is larger than the inner diameter of the end of the outer sleeve (32) close to the spherical cutter head (4).

5. A lollipop hole reaming cutter according to claim 4, Its characteristics are: There are a plurality of circular arc blades (41), and the plurality of circular arc blades (41) are evenly distributed about the axis of the blade rod (3).

6. A lollipop hole reaming cutter according to claim 5, Its characteristics are: The side wall of the circular arc blade (41) is provided with chip removal grooves (42) whose number is the same as the circular arc blade (41).

7. A lollipop hole reaming cutter according to claim 6, Its characteristics are: A rubber gasket (111) is arranged in the card slot (11).

Images