Milling cutter with replaceable cutter head

Abstract

The utility model discloses a milling cutter with a replaceable cutter head, which belongs to the technical field of machining and comprises a first cutter bar, a second cutter bar and the cutter head, a first connecting through hole is formed in the first cutter bar, and the cutter head is provided with a second connecting through hole and a first clamping groove. The first end of the second cutter bar sequentially penetrates through the second connecting through hole, the first clamping groove and the first connecting through hole and is connected with the first cutter bar. In the axis direction of the second cutter bar, the second end of the second cutter bar is used for abutting against one end of the cutter head, the first cutter bar abuts against the second end of the cutter head, and the second end of the second cutter bar is provided with a first clamping block matched with the first clamping groove. When the tool bit is replaced, only the second tool bar needs to be moved out of the second connecting through hole and the first connecting through hole, the tool bit is replaced, then the first tool bar, the second tool bar and the tool bit are assembled, replacement of the tool bit can be completed, and the problem that a tool bit in an existing milling cutter cannot be replaced is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, in particular to a milling cutter with a replaceable cutter head. Background Art

[0002] At present, when processing the shells of electronic products such as mobile phones, computers, and smart watches, CNC machine tools and forming milling cutters are usually used for milling to meet the high finish and precision requirements of such products. The cutter head and the cutter bar in the existing forming cutters are mostly integrated, and the forming blade is fixed in the cutter groove on the cutter head by welding. When the blade has a chipped edge, the alloy cutter body needs to be repaired or discarded, so a large number of alloy cutter bodies need to be remanufactured, resulting in waste of alloy cutter bodies.

[0003] In milling, the front section of a standard tool is significantly more worn than the rear section, and when the front section is worn to a certain extent, it must be replaced as a whole. For this purpose, a milling cutter with a replaceable cutter head is provided. Utility Model Content

[0004] The utility model aims to improve the problem that the cutter head of the existing milling cutter cannot be replaced, and provides a milling cutter with a replaceable cutter head.

[0005] The technical solutions to achieve the above objectives include the following:

[0006] A milling cutter with a replaceable cutter head comprises a first tool rod, a second tool rod and a tool head, wherein a first connecting through hole is formed in the first tool rod, and the tool head has a second connecting through hole and a first slot, and a first end of the second tool rod passes through the second connecting through hole, the first slot, and the first connecting through hole in sequence and is connected to the first tool rod; in the axial direction of the second tool rod, the second end of the second tool rod is used to abut against one end of the tool head, the first tool rod abuts against the second end of the tool head, and the second end of the second tool rod has a first block that matches the first slot.

[0007] In one of the embodiments, the cutter head also has a second slot, and the second slot and the first slot are respectively located at two ends of the second connecting through hole; the milling cutter with replaceable cutter head also has a sleeve, and the sleeve includes a shell and a second block, and the shell and the second block are an integrated structure, and the shell is sleeved on the outside of the second cutter rod, and the second block cooperates with the second slot.

[0008] In one embodiment, a third connecting hole is formed in the shell, a notch is opened on the wall of the shell, the notch is connected to the third connecting hole, and extends along the axial direction of the shell; the inner diameter of the shell is less than or equal to the outer diameter of the second knife rod.

[0009] In one embodiment, the milling cutter with replaceable cutter head also has a shank, the second tool rod has a first connecting portion, the first clamping block is installed at the first end of the first connecting portion, the second end of the first connecting portion has a connecting hole, and the shank is at least partially installed in the connecting hole.

[0010] In one embodiment, the shank includes a fixing portion and a second connecting portion, the fixing portion and the second connecting portion are an integral structure, the second connecting portion has an external thread, the connecting hole has an internal thread, and the second connecting portion is threadedly matched with the connecting hole.

[0011] In one embodiment, the end of the fixing portion has one of a straight groove, a Y-shaped groove and a cross groove, and the straight groove, the Y-shaped groove and the cross groove are arranged away from the second connecting portion.

[0012] In one embodiment, two ends of the cutter head abut against the first clamping block and the first end of the first cutter rod respectively, and the second end of the first cutter rod abuts against the cutter handle.

[0013] In one embodiment, the outer diameter of the fixing portion is equal to the outer diameter of the first blade rod.

[0014] In one embodiment, the cutter head includes a cutter body and a blade, the cutter body and the blade are an integral structure, and the blade is arranged in the circumferential direction of the cutter body; the second connecting through hole is formed in the cutter body, the first card slot and the second card slot are respectively connected to the two ends of the second connecting through hole, and the inner diameter of the first card slot or the second card slot is larger than the inner diameter of the second connecting through hole.

[0015] In one embodiment, the cross section of the first card slot or the second card slot is rectangular, and the shapes of the first card block and the second card block correspond to the first card slot and the second card slot, respectively.

[0016] The technical solution provided by the utility model has the following advantages and effects:

[0017] The first end of the second tool rod is passed through the second connecting through hole, the first clamping groove, and the first connecting through hole in sequence, so that the first section of the second tool rod is connected to the first tool rod, and the connection between the second tool rod and the first tool rod, the first clamping block is used to cooperate with the first clamping groove, so that the second tool rod drives the cutter head to rotate when rotating, and the first tool rod and the second tool rod clamp the cutter head and are used to limit the movement of the cutter head in the axial direction of the second tool rod, thereby improving the stability of the cutter head when rotating. When replacing the cutter head, it is only necessary to remove the second tool rod from the second connecting through hole and the first connecting through hole, replace the cutter head, and then assemble the first tool rod, the second tool rod and the cutter head to complete the replacement of the cutter head, thereby improving the problem that the cutter head in the existing milling cutter cannot be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings herein show specific examples of the technical solutions described in the present utility model, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present utility model.

[0019] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0020] Figure 1 It is a front view of a milling cutter with a replaceable cutter head in one embodiment of the utility model;

[0021] Figure 2 is a cross-sectional view of a milling cutter with a replaceable cutter head in one embodiment of the utility model;

[0022] Figure 3 It is an exploded view of a milling cutter with a replaceable cutter head in one embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the structure of the knife handle in one embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of a sleeve in one embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a cutter head in one embodiment of the utility model;

[0026] Description of reference numerals:

[0027] 100. Milling cutter;

[0028] 1. Knife handle; 11. Fixing part; 12. Second connecting part; 13. Slot;

[0029] 2. a first knife bar; 21. a first connecting through hole;

[0030] 3. Cutter head; 31. Cutter body; 32. Blade; 33. Second connecting through hole; 34. First slot; 35. Second slot;

[0031] 4. second knife bar; 41. first connecting portion; 42. connecting hole; 43. first clamping block;

[0032] 5. Sleeve; 51. Second clamping block; 52. Shell; 53. Notch; 54. Third connecting through hole. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0034] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0035] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] It should be noted that when a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a central component; when an component is considered to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time; when an component is considered to be "installed on" another component, it can be directly installed on the other component or there can be a central component at the same time. When an component is considered to be "set on" another component, it can be directly set on the other component or there can be a central component at the same time.

[0037] like Figures 1 to 3 As shown, a milling cutter 100 with a replaceable cutter head 3 includes a first tool rod 2, a second tool rod 4 and a tool head 3, wherein a first connecting through hole 21 is formed in the first tool rod 2, and the tool head 3 has a second connecting through hole 33 and a first slot 34, and a first end of the second tool rod 4 passes through the second connecting through hole 33, the first slot 34 and the first connecting through hole 21 in sequence and is connected to the first tool rod 2; in the axial direction of the second tool rod 4, the second end of the second tool rod 4 is used to abut against one end of the tool head 3, the first tool rod 2 abuts against the second end of the tool head 3, and the second end of the second tool rod 4 has a first block 43 that matches the first slot 34. The first end of the second cutter bar 4 is passed through the second connecting hole 33, the first clamping groove 34, and the first connecting hole 21 in sequence, so that the first end of the second cutter bar 4 is connected to the first cutter bar 2. The connection between the second cutter bar 4 and the first cutter bar 2, the first clamping block 43 is used to cooperate with the first clamping groove 34, so that the second cutter bar 4 drives the cutter head 3 to rotate when rotating, the first cutter bar 2 and the second cutter bar 4 clamp the cutter head 3, and are used to limit the movement of the cutter head 3 in the axial direction of the second cutter bar 4, thereby improving the stability of the cutter head 3 when rotating. When replacing the cutter head 3, it is only necessary to remove the second cutter bar 4 from the second connecting hole 33 and the first connecting hole 21, and replace the cutter head 3, and then assemble the first cutter bar 2, the second cutter bar 4 and the cutter head 3 to complete the replacement of the cutter head 3, thereby improving the problem that the cutter head 3 in the existing milling cutter 100 cannot be replaced.

[0038] In this embodiment, the cross-section of the first connecting hole 21 of the first tool rod 2 can be square, and the cross-section of the first connecting portion 41 of the second tool rod 4 is also a square structure. The first tool rod 2 is sleeved on the outside of the first connecting portion 41. After the first tool rod 2 and the second tool rod 4 are assembled, the chuck rotates the first tool rod 2 to drive the second tool rod 4 to rotate, avoiding slippage between the first tool rod 2 and the second tool rod 4, and improving the integrity of the first tool rod 2 and the second tool rod 4 after assembly.

[0039] like Figure 2 , Figure 3 as well as Figure 5 As shown, the cutter head 3 also has a second card slot 35, and the second card slot 35 and the first card slot 34 are respectively located at the two ends of the second connecting through hole 33; the milling cutter 100 with a replaceable cutter head 3 also has a sleeve 5, and the sleeve 5 includes a shell 52 and a second card block 51, and the shell 52 and the second card block 51 are an integral structure, and the shell 52 is sleeved outside the second cutter bar 4, and the second card block 51 cooperates with the second card slot 35. In this embodiment, when the second cutter bar 4 rotates, it will drive the shell 52 to rotate, and the shell 52 and the second card block 51 are an integral structure. Therefore, the second card block 51 cooperates with the second card slot 35, so that the sleeve 5 drives the cutter head 3 to rotate when it rotates, thereby improving the integrity of the connection between the second cutter bar 4 and the cutter head 3, and when the second cutter bar 4 rotates, the cutter head 3 is prevented from slipping.

[0040] As Figure 5 As shown, a third connecting through hole 54 is formed in the shell 52, and a notch 53 is provided on the wall of the shell 52, the notch 53 is connected to the third connecting through hole 54, and is extended along the axis direction of the shell 52; the inner diameter of the shell 52 is less than or equal to the outer diameter of the second cutter bar 4. In this embodiment, by providing the notch 53 on the wall of the shell 52, when the shell 52 is sleeved on the second cutter bar 4, the notch 53 of the shell 52 is squeezed by the second cutter bar 4, and the shell 52 expands, thereby improving the compactness of the shell 52 and the second cutter bar 4. Moreover, in terms of the material of the sleeve 5, an elastic material can be used, and the inner wall and outer wall of the shell 52 are set to be relatively rough, so as to increase the friction resistance between the shell 52 and the inner wall of the cutter head 3 and the outer wall of the second cutter bar 4, thereby improving the integrity of the sleeve 5 when it is respectively matched with the cutter head 3 and the second cutter bar 4.

[0041] like Figures 1 to 3As shown, the milling cutter 100 further comprises a tool handle 1, the second tool bar 4 comprises a first connection portion 41, the first clamping block 43 is mounted at a first end of the first connection portion 41, the second end of the first connection portion 41 comprises a connection hole 42, and the tool handle 1 is at least partially mounted in the connection hole 42. In this embodiment, by mounting the tool handle 1 in the connection hole 42 of the first connection portion 41, after the tool handle 1 and the second tool bar 4 are fixed, the tool handle 1 is fixed to a chuck of a machine tool, and the chuck drives the second tool bar 4 and the tool head 3 to rotate through the tool handle 1, so that the milling cutter 100 cuts a workpiece.

[0042] like Figure 4 As shown, the tool handle 1 includes a fixing portion 11 and a second connecting portion 12. The fixing portion 11 and the second connecting portion 12 are an integrated structure. The second connecting portion 12 has an external thread, and the connecting hole 42 has an internal thread. The second connecting portion 12 is threadedly matched with the connecting hole 42. In this embodiment, the fixing portion 11 is used to be installed on the chuck of the machine tool. The fixing portion 11 is threadedly connected to the second tool bar 4 through the second connecting portion 12, thereby improving the flexibility of installation between the tool handle 1 and the second tool bar 4.

[0043] like Figure 4 As shown, the end of the fixing portion 11 has one of a straight groove 13, a Y-shaped groove and a cross groove, and the straight groove 13, the Y-shaped groove and the cross groove are arranged away from the second connecting portion 12. In this embodiment, by providing the straight groove 13 at the end of the fixing portion 11, it is convenient to insert a tool into the straight groove 13, and tighten the fixing portion 11, thereby improving the stability of the connection between the fixing portion 11 and the second connecting portion 12.

[0044] like Figures 1 to 3 As shown, the two ends of the cutter head 3 are respectively against the first clamping block 43 and the first end of the first cutter bar 2, and the second end of the first cutter bar 2 is against the handle 1. In this embodiment, the two ends of the cutter head 3 are respectively against the first end of the first cutter bar 2 and the first clamping block 43, thereby improving the stability of the cutter head 3 in the axial direction of the first cutter bar 2 or the second cutter bar 4; moreover, the second end of the first cutter bar 2 is against the handle 1, thereby limiting the movement of the first cutter bar 2 in the axial direction, thereby further improving the compactness of the structure among the handle 1, the first cutter bar 2 and the cutter head 3.

[0045] like Figure 1 and Figure 2 As shown, the outer diameter of the fixing portion 11 is equal to the outer diameter of the first tool rod 2, so that the chuck can clamp the outer surface of the fixing portion 11 and the first tool rod 2 at the same time, thereby increasing the contact area between the chuck and the milling cutter 100 and improving the stability of the chuck and the milling cutter 100 after being fixed.

[0046] like Figure 3 and Figure 6As shown, the cutter head 3 includes a cutter body 31 and a blade 32, the cutter body 31 and the blade 32 are an integrated structure, and the blade 32 is arranged on the circumference of the cutter body 31; the cutter body 31 forms the second connecting through hole 33, the first clamping groove 34 and the second clamping groove 35 are respectively connected to the two ends of the second connecting through hole 33, and the inner diameter of the first clamping groove 34 or the second clamping groove 35 is larger than the inner diameter of the second connecting through hole 33. In this embodiment, the blade 32 is used to cut and process the workpiece, the cutter body 31 is used to be sleeved on the outside of the sleeve 5, and the second connecting through hole 33 is used for one end of the second cutter bar 4 to pass through, so that the first clamping groove 34 is clamped with the first clamping block 43, and the second clamping groove 35 is clamped with the second clamping block 51, so as to improve the integrity between the sleeve 5, the second cutter bar 4, and the cutter head 3. The inner diameter of the first clamping groove 34 or the second clamping groove 35 is larger than the inner diameter of the second connecting through hole 33 , so that the second cutter bar 4 can pass through the cutter head 3 and the sleeve 5 , thereby improving the convenience of assembling the milling cutter 100 .

[0047] like Figure 3 and Figure 6 As shown, the cross section of the first clamping groove 34 or the second clamping groove 35 is rectangular, and the shapes of the first clamping block 43 and the second clamping block 51 respectively correspond to the first clamping groove 34 and the second clamping groove 35. In this embodiment, the cross section of the first clamping groove 34 or the second clamping groove 35 is rectangular, which improves the connection stability between the cutter head 3 and the second cutter rod 4, and the connection stability between the cutter head 3 and the sleeve 5.

[0048] When quoting drawing descriptions, new features that appear are described; in order to avoid repeated quotations of drawings resulting in less concise descriptions, features that have been described clearly will not be quoted in the drawings one by one.

[0049] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the utility model, and to fully describe the technical solution, purpose and effect of the utility model. Its purpose is to make the public understand the disclosed content of the utility model more thoroughly and comprehensively, and it does not limit the protection scope of the utility model.

[0050] The above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A milling cutter with a replaceable cutter head, characterized in that: It includes a first tool rod, a second tool rod and a tool head, wherein a first connecting through hole is formed in the first tool rod, and the tool head has a second connecting through hole and a first slot, and the first end of the second tool rod passes through the second connecting through hole, the first slot, and the first connecting through hole in sequence, and is connected to the first tool rod; in the axial direction of the second tool rod, the second end of the second tool rod is used to abut against one end of the tool head, the first tool rod abuts against the second end of the tool head, and the second end of the second tool rod has a first block that matches the first slot.

2. The milling cutter according to claim 1, characterized in that The cutter head also has a second slot, and the second slot and the first slot are respectively located at the two ends of the second connecting through hole; the milling cutter with a replaceable cutter head also has a sleeve, and the sleeve includes a shell and a second block, and the shell and the second block are an integrated structure, the shell is sleeved on the outside of the second cutter rod, and the second block cooperates with the second slot.

3. The milling cutter according to claim 2, characterized in that A third connecting through hole is formed in the shell, a notch is formed on the wall of the shell, the notch is connected to the third connecting through hole and extends along the axis of the shell; the inner diameter of the shell is less than or equal to the outer diameter of the second knife rod.

4. The milling cutter according to claim 1, characterized in that The milling cutter with replaceable cutter head also has a shank, the second cutter rod has a first connecting portion, the first clamping block is installed at the first end of the first connecting portion, the second end of the first connecting portion has a connecting hole, and the shank is at least partially installed in the connecting hole.

5. The milling cutter according to claim 4, characterized in that The knife handle includes a fixing portion and a second connecting portion. The fixing portion and the second connecting portion are an integrated structure. The second connecting portion has an external thread, and the connecting hole has an internal thread. The second connecting portion is threadedly matched with the connecting hole.

6. The milling cutter according to claim 5, characterized in that The end of the fixing portion has one of a straight groove, a Y-shaped groove and a cross groove, and the straight groove, the Y-shaped groove and the cross groove are arranged away from the second connecting portion.

7. The milling cutter according to claim 5, characterized in that The two ends of the cutter head abut against the first clamping block and the first end of the first cutter rod respectively, and the second end of the first cutter rod abuts against the cutter handle.

8. The milling cutter according to claim 5, characterized in that The outer diameter of the fixing portion is equal to the outer diameter of the first knife bar.

9. The milling cutter according to claim 2, characterized in that: The cutter head includes a cutter body and a blade, wherein the cutter body and the blade are an integral structure, and the blade is arranged in the circumferential direction of the cutter body; the second connecting through hole is formed in the cutter body, and the first slot and the second slot are respectively connected to the two ends of the second connecting through hole, and the inner diameter of the first slot or the second slot is larger than the inner diameter of the second connecting through hole.

10. The milling cutter according to claim 9, characterized in that The cross section of the first card slot or the second card slot is rectangular, and the shapes of the first card block and the second card block correspond to the first card slot and the second card slot respectively.

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