Four-edge cutting milling cutter

Abstract

The utility model belongs to the technical field of machining cutters, and particularly relates to a four-edge cutting milling cutter which comprises a cutter handle part, a four-edge cutter head and a clamping rod, and further comprises an extension rod fixed at the top end of the four-edge cutter head, a plurality of limiting grooves distributed at equal intervals in the length direction of the extension rod are machined in the extension rod, and an adjusting groove allowing the extension rod to be embedded in is machined in the cutter handle part; an internal thread counter bore is machined in the cutter handle part, the first countersunk head screw is installed in the internal thread counter bore in a thread screwing mode, and the end of the first countersunk head screw is embedded into the limiting groove; according to the cutting and milling cutter, the extension rod and the adjusting groove are connected into a telescopic structure and locked through the first countersunk head screw, the overall length of the cutting and milling cutter can be adjusted conveniently, the diameter of the cutter handle part is equal to that of the four-edge cutter head, operation in a narrow space is not affected, and operation safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining tools, and in particular relates to a four-edge cutting milling cutter. Background Art

[0002] A milling cutter is a very common type of machining tool. It is a rotating tool with one or more teeth used for milling. When working, each tooth cuts off the workpiece's excess in sequence and intermittently. Milling cutters are mainly used to process planes, steps, grooves, formed surfaces and cut off workpieces on milling machines.

[0003] A four-flute milling cutter refers to a milling cutter with four cutting edges on each cutting surface. The milling cutter is usually made of carbide and includes an integrally formed cutter head and shank. Although it can complete most cutting operations, its length is limited and there are high restrictions on its use in some deep groove processing work scenarios.

[0004] It was retrieved from the prior art that a Chinese utility model patent with authorization announcement number CN220659342U discloses "a four-blade flat-end mill with adjustable milling depth", which includes a four-blade flat-end mill body, the upper part of which is connected to an extension part via an insert, and a sheath is provided on the outer side of the extension part, wherein the extension part is connected to the outer side of the four-blade flat-end mill body via the insert, and the insert is sealed via the sheath.

[0005] Although the four-edge milling cutters in the prior art, including those mentioned above, can adjust the overall length of the milling cutter, in actual use, the sheath is cylindrical and its diameter must be larger than the cutter head. When operating in a narrow space, the sheath is easily damaged by hitting the workpiece, posing a high safety hazard.

[0006] In order to solve the above problems, the utility model proposes a four-edge cutting milling cutter. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a four-edge cutting milling cutter, which has the characteristics of easy use, wide application range and high safety performance.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: a four-edge cutting milling cutter, comprising a shank portion, a four-edge cutter head, and a clamping rod, wherein the four-edge cutter head is connected to the bottom end of the shank portion, the clamping rod is fixed to the top end of the shank portion, and a clamping groove is machined on the clamping rod, the diameter of the shank portion is equal to that of the four-edge cutter head, and further comprising:

[0009] An extension rod, the extension rod is fixed to the top end of the four-edged blade head, and a plurality of limiting grooves are processed on the extension rod and distributed at equal intervals along its length direction, and an adjustment groove is processed in the handle portion for the extension rod to be embedded;

[0010] A No. 1 countersunk screw is processed with an internal threaded countersunk hole on the shank portion, the No. 1 countersunk screw is installed in the internal threaded countersunk hole by screwing, and the end of the No. 1 countersunk screw is embedded in the limiting groove.

[0011] As a preferred technical solution of the utility model, it also includes:

[0012] Positioning rods, four of which are fixed to the top of the four-edged cutter head at equal intervals along the circumferential direction, and a No. 1 positioning groove for the positioning rods to be embedded is processed on the shank.

[0013] As a preferred technical solution of the present invention, the outer wall of the extension rod abuts against the inner wall of the adjustment slot.

[0014] As a preferred technical solution of the present invention, the transverse sections of the extension rod and the adjustment slot are both regular hexagonal structures.

[0015] As a preferred technical solution of the present invention, scale lines are provided on the outer wall of the extension rod.

[0016] As a preferred technical solution of the present invention, there are two No. 1 countersunk screws symmetrically distributed.

[0017] As a preferred technical solution of the utility model, it also includes:

[0018] A positioning block is fixed to the top of the shank portion, and a second positioning groove is provided on the bottom surface of the clamping rod for the positioning block to be embedded in;

[0019] An internally threaded fixing tube, the internally threaded fixing tube being fixed on the positioning block, and a positioning through hole for embedding the internally threaded fixing tube being processed in the clamping rod;

[0020] A No. 2 countersunk screw is processed with a countersunk hole connected to the positioning through hole at the top end of the clamping rod. The No. 2 countersunk screw passes through the countersunk hole and is screwed into the internal thread fixing tube through thread engagement.

[0021] As a preferred technical solution of the present invention, the transverse sections of the positioning block and the second positioning groove are both regular hexagonal structures, and the outer wall of the positioning block abuts against the inner wall of the second positioning groove.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In the utility model, the extension rod and the adjustment slot are connected to form a telescopic structure, and are locked by a No. 1 countersunk screw, which facilitates the adjustment of the overall length of the cutting milling cutter. The diameter of the shank is equal to that of the four-edge cutter head, which does not affect the operation in a narrow space and improves the safety of the operation.

[0024] Other additional advantages and beneficial effects of the present invention will be partially given in the following description, and partially become obvious from the following description, or be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural diagram of the utility model;

[0027] Figure 2 For this utility model Figure 1 A in the figure shows the enlarged structural diagram;

[0028] Figure 3 This is a schematic diagram of the axonometric structure of the clamping rod in the present invention.

[0029] In the figure: 1. Tool handle; 11. Adjustment slot; 12. Internal thread countersunk hole; 13. Positioning slot No. 1; 14. Positioning block; 15. Internal thread fixing tube; 2. Four-edged tool head; 21. Extension rod; 211. Limiting slot; 212. Scale line; 22. Positioning rod; 3. Clamping rod; 31. Clamping slot; 32. Positioning slot No. 2; 33. Positioning through hole; 34. Countersunk hole; 4. Countersunk screw No. 1; 5. Countersunk screw No. 2. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 3The utility model provides the following technical solutions: a four-edge cutting milling cutter, comprising a shank portion 1, a four-edge cutter head 2 and a clamping rod 3, the four-edge cutter head 2 being connected to the bottom end of the shank portion 1, the clamping rod 3 being fixed to the top end of the shank portion 1, and a clamping groove 31 being processed on the clamping rod 3, the diameters of the shank portion 1 and the four-edge cutter head 2 being equal, and further comprising: an extension rod 21 and a No. 1 countersunk screw 4.

[0032] Further, by Figure 1 and Figure 2 As shown, in this embodiment, the extension rod 21 is fixed to the top of the four-edged cutter head 2, and a plurality of limiting grooves 211 are processed on the extension rod 21 and distributed at equal intervals along its length direction. An adjustment groove 11 for the extension rod 21 to be embedded is processed in the shank portion 1, and an internal thread countersunk hole 12 is processed on the shank portion 1. The No. 1 countersunk screw 4 is installed in the internal thread countersunk hole 12 by screwing, and the end of the No. 1 countersunk screw 4 is embedded in the limiting groove 211. After adopting the above scheme, when in use, the four-edged cutter head 2 is fixed to the output shaft of the machine tool by the clamping rod 3, and the output shaft of the machine tool is controlled by The four-edged cutter head 2 is working, and the workpiece to be processed is fixed on the machining table of the machine tool with a special fixture. When necessary, first loosen the No. 1 countersunk screw 4 to disengage the No. 1 countersunk screw 4 from the limiting groove 211, and then adjust the embedding amount of the extension rod 21 to adjust the length of the entire cutting milling cutter to meet different processing scenarios. After the adjustment is completed, tighten the No. 1 countersunk screw 4 to embed the No. 1 countersunk screw 4 into the limiting groove 211 at different positions for locking to ensure stability. Moreover, because the diameter of the shank part 1 is equal to that of the four-edged cutter head 2, it does not affect the operation in a small space, thereby improving the safety of the operation.

[0033] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, it also includes: positioning rods 22, four positioning rods 22 are fixed at equal intervals along the circumferential direction on the top end of the four-blade cutter head 2, and a positioning groove No. 1 13 for the positioning rods 22 to be embedded is processed on the handle part 1. After adopting the above scheme, when connecting the four-blade cutter head 2 and the handle part 1, the positioning rods 22 are embedded in the positioning groove No. 1 13. On the one hand, the connection between the four-blade cutter head 2 and the handle part 1 is positioned, and on the other hand, the stability of the connection between the four-blade cutter head 2 and the handle part 1 is further improved, thereby avoiding the relative rotation of the four-blade cutter head 2 and the handle part 1 during operation, which affects the processing quality.

[0034] It should be noted that the positioning rod 22 and the four-edged cutter head 2 preferably adopt an integrally formed structure, and the positioning rod 22 can also be fixed by welding. When welding is used, the welding points need to be polished to ensure that the connection position is smooth and has no protrusions.

[0035] Preferably, by Figure 1 and Figure 2As shown, in this embodiment, the outer wall of the extension rod 21 abuts against the inner wall of the adjustment groove 11. After adopting the above solution, when in use, the stability of the connection between the four-edged cutter head 2 and the handle part 1 is improved, and the relative shaking between the four-edged cutter head 2 and the handle part 1 during operation is avoided to affect the processing quality.

[0036] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the cross-sections of the extension rod 21 and the adjustment groove 11 are both regular hexagonal structures. After adopting the above scheme, when in use, the stability of the connection between the four-edged cutter head 2 and the handle part 1 is improved, and the relative rotation between the four-edged cutter head 2 and the handle part 1 during operation is avoided to affect the processing quality.

[0037] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, scale lines 212 are provided on the outer wall of the extension rod 21. After adopting the above solution, the length of the cutting milling cutter can be accurately adjusted by using the provided scale lines 212 during use.

[0038] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, there are two No. 1 countersunk screws 4 symmetrically distributed. After adopting the above solution, the stability of the connection between the four-edged blade head 2 and the handle part 1 can be further improved during use.

[0039] Preferably, by Figure 1 and Figure 3 When the tool is in the working state, the tool 1 is fixed with the second fixing hole 33, and the fixing hole 33 is fixed with the second fixing hole 33, and the fixing hole 33 is fixed with the second fixing hole 33. When the tool is in the working state, the tool 1 is fixed with the second fixing hole 33, and the fixing hole 33 is fixed with the second fixing hole 33.

[0040] Preferably, by Figure 1 and Figure 3As shown, in this embodiment, the transverse cross-sections of the positioning block 14 and the No. 2 positioning groove 32 are both regular hexagonal structures, and the outer wall of the positioning block 14 abuts against the inner wall of the No. 2 positioning groove 32. After adopting the above scheme, when in use, the stability of the connection between the clamping rod 3 and the tool handle part 1 is improved, and the clamping rod 3 and the tool handle part 1 are prevented from relative rotation or shaking during operation, which affects the processing quality.

[0041] Components not described in detail herein are prior art.

[0042] The working principle and use process of the utility model: When using the four-edge cutting milling cutter of the utility model, the four-edge cutter head 2 is fixed to the output shaft of the machine tool through the clamping rod 3, and the four-edge cutter head 2 is controlled to work by the output shaft of the machine tool, and the workpiece to be processed is fixed on the processing table of the machine tool using a special fixture;

[0043] When necessary, first loosen the No. 1 countersunk screw 4 to disengage the No. 1 countersunk screw 4 from the limiting groove 211, and then adjust the embedding amount of the extension rod 21 to adjust the length of the entire cutting milling cutter to meet different processing scenarios. After the adjustment is completed, tighten the No. 1 countersunk screw 4 to embed the No. 1 countersunk screw 4 into the limiting groove 211 at different positions to lock it, ensuring stability. Moreover, because the diameters of the shank portion 1 and the four-edge cutter head 2 are equal, it does not affect the operation in a narrow space, thereby improving the safety of the operation.

[0044] In addition, the clamping rod 3 of the present invention is detachable, which is convenient for installation and use, and is also convenient for replacing different clamping rods 3 according to actual installation needs. When installing the clamping rod 3, the positioning block 14 is embedded in the No. 2 positioning groove 32 for positioning. At this time, the internal threaded fixing tube 15 is embedded in the positioning through hole 33, and the No. 2 countersunk screw 5 is tightened to achieve stable installation of the clamping rod 3.

[0045] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A four-edge cutting milling cutter, comprising a shank portion (1), a four-edge cutter head (2) and a clamping rod (3), wherein the four-edge cutter head (2) is connected to the bottom end of the shank portion (1), the clamping rod (3) is fixed to the top end of the shank portion (1), and a clamping groove (31) is machined on the clamping rod (3), characterized in that: The handle portion (1) has the same diameter as the four-edged blade head (2), and further comprises: An extension rod (21), the extension rod (21) being fixed to the top end of the four-edged blade head (2), and having a plurality of limiting grooves (211) distributed at equal intervals along the length direction thereof, and an adjustment groove (11) for embedding the extension rod (21) being processed in the shank portion (1); A No. 1 countersunk screw (4) is processed with an internal threaded countersunk hole (12) on the shank portion (1); the No. 1 countersunk screw (4) is installed in the internal threaded countersunk hole (12) by screwing, and the end of the No. 1 countersunk screw (4) is embedded in the limiting groove (211).

2. A four-edge cutting milling cutter according to claim 1, characterized in that: Also includes: Positioning rods (22), four of the positioning rods (22) are fixed to the top of the four-edged blade head (2) at equal intervals along the circumferential direction, and a No. 1 positioning groove (13) for the positioning rods (22) to be embedded is processed on the handle (1).

3. A four-edge cutting milling cutter according to claim 1, characterized in that: The outer wall of the extension rod (21) abuts against the inner wall of the adjustment slot (11).

4. A four-edge cutting milling cutter according to claim 1, characterized in that: The transverse sections of the extension rod (21) and the adjustment slot (11) are both regular hexagonal structures.

5. The four-edge cutting milling cutter according to claim 1, characterized in that: A scale line (212) is provided on the outer wall of the extension rod (21).

6. The four-edge cutting milling cutter according to claim 1, characterized in that: There are two No. 1 countersunk screws (4) symmetrically distributed.

7. The four-edge cutting milling cutter according to claim 1, characterized in that: Also includes: A positioning block (14), wherein the positioning block (14) is fixed to the top end of the shank portion (1), and a second positioning groove (32) is provided on the bottom surface of the clamping rod (3) for the positioning block (14) to be embedded; An internally threaded fixing tube (15), the internally threaded fixing tube (15) being fixed on the positioning block (14), and a positioning through hole (33) for embedding the internally threaded fixing tube (15) being machined in the clamping rod (3); A No. 2 countersunk screw (5) is processed at the top end of the clamping rod (3) with a countersunk hole (34) that communicates with the positioning through hole (33). The No. 2 countersunk screw (5) passes through the countersunk hole (34) and is screwed into the internal thread fixing tube (15) by screwing.

8. The four-edge cutting milling cutter according to claim 7, characterized in that: The transverse sections of the positioning block (14) and the second positioning groove (32) are both regular hexagonal structures, and the outer wall of the positioning block (14) abuts against the inner wall of the second positioning groove (32).

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