CN216462026U - Welded structure end mill - Google Patents
Welded structure end mill Download PDFInfo
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- CN216462026U CN216462026U CN202121951488.8U CN202121951488U CN216462026U CN 216462026 U CN216462026 U CN 216462026U CN 202121951488 U CN202121951488 U CN 202121951488U CN 216462026 U CN216462026 U CN 216462026U
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Abstract
The utility model provides an end milling cutter with a welded structure, which belongs to the field of mechanical manufacturing and comprises a hard alloy cutter head, an alloy tool steel cutter handle and a reinforcing pin, wherein the hard alloy cutter head and the alloy tool steel cutter handle are fixed through the reinforcing pin. The diameter of the welding part of the hard alloy cutter head is used for being matched with the welding hole; the pin slot is used for being matched with the strengthening pin; the circumferential teeth are located on the diameter of the welded portion and the helix angle thereof is used to achieve good chip removal performance. The alloy tool steel knife handle is provided with a welding hole, a pin hole and an exhaust hole, and the exhaust hole is communicated with the welding hole and used for exhausting air in the welding hole during welding. The utility model can effectively ensure the welding quality of the cutter head and the cutter handle and provide good bending resistance and torsion resistance; the cutter head and the cutter handle have good coaxiality, the reserved allowance for finish machining is greatly reduced, and the machining efficiency is remarkably improved.
Description
Technical Field
The utility model belongs to the field of mechanical manufacturing, and relates to an end milling cutter with a welded structure.
Background
In aircraft manufacturing, with more and more difficult-to-machine materials, common high-speed steel end mills are being replaced by cemented carbide end mills step by step. But is limited by the structure and space of airplane parts, and end mills with special structures are required. The end mills have relatively small tool bit diameters and relatively large tool shank diameters and are not suitable for being made into integral hard alloy tools. But the machining requirements cannot be met if a high-speed steel end mill is used. Based on the above problems, the present invention creates a welded structure end mill.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the end milling cutter with a special structure cannot be manufactured into a whole hard alloy cutter, the utility model provides the end milling cutter with the welded structure, which can meet the machining requirement of airplane parts and solve the manufacturing problem of the hard alloy cutter.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a welded structure end mill, includes carbide tool bit 1, alloy tool steel handle of a knife 2 and 3 triplexes of reinforcing round pin, is fixed through reinforcing round pin 3 between carbide tool bit 1 and the alloy tool steel handle of a knife 2.
The hard alloy cutter head 1 comprises a welding part diameter 1-1, pin grooves 1-2 and circumferential teeth. The diameter 1-1 of the welding part is used for being matched with the welding hole 2-1, so that the coaxiality of the tool bit and the tool handle is ensured; the pin groove 1-2 is arranged in the middle of one end face of the welding part with the diameter of 1-1 and is used for being matched with the reinforcing pin 3; the circumferential teeth are arranged at the other end of the welding part with the diameter of 1-1, and a helical angle of 1-3 is formed between the circumferential teeth and the central axis of the welding part with the diameter of 1-1, so that good chip removal performance is realized.
The specific angle design requirement of the circumferential teeth is as follows: the first back angle 1-4 of the circumferential teeth of the tool bit part of the hard alloy tool bit 1 is 12 degrees, the second back angle 1-5 of the circumferential teeth of the tool body part is 18 degrees, the front angle 1-6 of the circumferential teeth is 5 degrees +/-1 degree, the width 1-7 of the first tooth back of the circumferential teeth is 0.8mm, the width 1-8 of the second tooth back of the circumferential teeth is 1.6mm, and the depth 1-9 of the circumferential teeth is 2mm, so that the sharp tooth shape of the circumferential teeth is firm, and the hard alloy tool bit is suitable for cutting difficult-to-process materials; the fillet rear angle 1-10 is 10 degrees +/-1 degree and is used for ensuring that the fillet has enough strength during cutting; the end tooth axial angle 1-11 is 2-3 degrees, the end tooth groove angle 1-12 is 30 degrees, the end tooth first back angle 1-13 is 10 degrees +/-1 degree, the end tooth second back angle 1-14 is 18 degrees, the end tooth front angle 1-15 is 4 degrees +/-1 degree, and the end tooth back width 1-16 is 1mm, so that the tooth form of the end tooth is sharp and firm, and the end tooth is suitable for cutting difficult-to-process materials.
The alloy tool steel knife handle 2 is provided with a welding hole 2-1, a pin hole 2-2 and an exhaust hole 2-3. The welding hole 2-1 is arranged at one end of the alloy tool steel tool shank 2, the diameter of the welding hole is 0.2mm larger than that of the welding part 1-1, the tolerance is controlled within +0.02mm, and the welding hole is used for obtaining a good welding gap when the welding hole is matched with the welding part 1-1 of the tool bit to be welded, improving the flowability of welding flux, ensuring full welding and ensuring the welding quality. The diameter of the pin hole 2-2 is 4mm, and the tolerance is H7 grade. The exhaust hole 2-3 is communicated with the welding hole 2-1, so that air in the welding hole can be effectively exhausted during welding, and the welding quality is improved.
The reinforcing pin 3 is selected according to the diameters of the cutter head and the cutter handle.
Furthermore, the diameter of the welding part is 1-1 mm, and the tolerance is controlled within-0.02 mm.
Furthermore, the radius of the pin slot 1-2 is 2mm, and the tolerance is controlled within +0.02 mm.
Further, the helix angle 1-3 is 30 °.
Furthermore, the diameter of the exhaust hole 2-3 is 2 mm.
The utility model has the beneficial effects that: the end milling cutter with the welded structure can effectively ensure the welding quality of the cutter head and the cutter handle and provide good bending resistance and torsion resistance. The cutter head and the cutter handle have good coaxiality, the reserved allowance for finish machining is greatly reduced, and the machining efficiency is remarkably improved. The problem that the end milling cutter with special structure cannot be made of hard alloy is solved.
Drawings
FIG. 1 is a schematic view of a welded construction end mill construction; FIG. 1(a) is a front view; fig. 1(b) is a side view.
2(a) -2 (g) are schematic views of cemented carbide insert configurations; FIG. 2(a) is a front view; FIG. 2(b) is a left side view; FIG. 2(c) is a partially enlarged view; FIG. 2(d) is a cross-sectional view taken along the plane A-A in FIG. 2 (a); FIG. 2(e) is a cross-sectional view taken along the plane B-B in FIG. 2 (a); FIG. 2(f) is a cross-sectional view taken along the plane C-C in FIG. 2 (C); FIG. 2(g) is a sectional view taken along the plane D-D in FIG. 2 (b).
FIG. 3 is a schematic structural view of an alloy tool steel shank;
in the figure: 1, a hard alloy cutter head; 2, an alloy tool steel knife handle; 3, reinforcing pins; 1-1 weld diameter; 1-2 pin grooves; 1-3 helix angle; 1-4 circumferential teeth first relief angle; 1-5 circumferential teeth second relief angle; 1-6 circumferential tooth rake angles; 1-7 circumferential teeth first tooth back width; 1-8 circumferential teeth second tooth back width; 1-9 circumferential teeth depth; 1-10 fillet relief angles; 1-11 end tooth axial angles; 1-12 end tooth flute angles; 1-13 end tooth first relief angle; 1-14 end tooth second relief angles; 1-15 end tooth rake angles; 1-16 end tooth back widths; 2-1 welding holes; 2-2 pin holes; 2-3 air vents.
Detailed Description
The present invention is further illustrated by the following examples.
A welded structure end mill is composed of three parts: the tool comprises a hard alloy tool bit 1, an alloy tool steel tool shank 2 and a reinforcing pin 3.
The cemented carbide tool bit 1 comprises important geometrical structures, and as can be seen from a front view, the cemented carbide tool bit 1 comprises a welding part diameter 1-1, pin grooves 1-2 and a helical angle 1-3; the circumferential tooth first relief angle 1-4 is seen from the left side view, the circumferential tooth second relief angle 1-5, the circumferential tooth front angle 1-6, the circumferential tooth first back width 1-7 and the circumferential tooth second back width 1-8 are seen from the A-A cross-sectional view, the circumferential tooth depth 1-9 is seen from the B-B cross-sectional view, the fillet relief angle 1-10 and the end tooth centripetal angle 1-11 are seen from the top cross-sectional view, the end tooth groove angle 1-12 is seen from the C-C cross-sectional view, and the end tooth first relief angle 1-13, the end tooth second relief angle 1-14, the end tooth front angle 1-15 and the end tooth back width 1-16 are seen from the D-D cross-sectional view.
The diameter 1-1 of the welding part is 10mm, and the tolerance is controlled within-0.02 mm so as to be matched with the welding hole 2-1; the radius of the pin slot 1-2 is 2mm, and the tolerance is controlled within +0.02mm so as to be matched with the strengthening pin 3; the helix angle is 1-3 and is 30 degrees, so that good chip removal performance is obtained; the first back angle 1-4 of the circumferential teeth is 12 degrees, the second back angle 1-5 of the circumferential teeth is 18 degrees, the front angle 1-6 of the circumferential teeth is 5 degrees +/-1 degree, the width of the first back of the circumferential teeth is 1-7 mm, the width of the second back of the circumferential teeth is 1-8 mm, the width of the second back of the circumferential teeth is 1-6 mm, and the depth of the circumferential teeth is 1-9 mm, so that the tooth form of the circumferential teeth can be sharp and firm, and the cutting tool is suitable for cutting difficult-to-process materials; the fillet rear angle 1-10 is 10 degrees +/-1 degree, and the fillet is ensured to have enough strength during cutting; the end tooth axial angle 1-11 is 2-3 degrees, the end tooth groove angle 1-12 is 30 degrees, the end tooth first back angle 1-13 is 10 degrees +/-1 degree, the end tooth second back angle 1-14 is 18 degrees, the end tooth front angle 1-15 is 4 degrees +/-1 degree, and the end tooth back width 1-16 is 1mm, so that the tooth form of the end tooth is sharp and firm, and the end tooth is suitable for cutting difficult-to-process materials.
The alloy tool steel shank 2 comprises three important geometrical structures of a welding hole 2-1, a pin hole 2-2 and an exhaust hole 2-3.
The diameter of a welding hole 2-1 of the alloy tool steel knife handle 2 is 10.2mm, the tolerance is controlled within +0.02mm, so that a good welding gap can be obtained when the alloy tool steel knife handle is matched with a knife head for welding, the fluidity of welding flux is improved, the welding is sufficient, and the welding quality is ensured; the diameter of the pin hole 2-2 is 4mm, and the tolerance is H7 grade, so that the pin hole can be matched with the reinforcing pin 3; the diameter of the exhaust hole 2-3 is 2mm, so that air in the welding hole can be effectively exhausted during welding, and the welding quality is improved.
The reinforcing pin 3 is selected according to the diameters of the cutter head and the cutter handle.
The diameter of the strengthening pin 3 is 4mm, and the tolerance is n6 grade, so that the pin groove 1-2 is matched with the pin hole 2-2, and the torsion resistance of the welding tool can be greatly improved.
The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the utility model patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.
Claims (5)
1. The end mill with the welded structure is characterized by comprising three parts, namely a hard alloy tool bit (1), an alloy tool steel shank (2) and a strengthening pin (3), wherein the hard alloy tool bit (1) and the alloy tool steel shank (2) are fixed through the strengthening pin (3);
the hard alloy cutter head (1) comprises a welding part diameter (1-1), pin grooves (1-2) and circumferential teeth; the diameter (1-1) of the welding part is matched with the welding hole (2-1); the pin groove (1-2) is arranged in the middle of one end face of the diameter (1-1) of the welding part and is matched with the reinforcing pin (3); the circumferential teeth are arranged on the diameter (1-1) of the welding part, and spiral angles (1-3) are arranged on the circumferential teeth;
the specific angle design requirement of the circumferential teeth is as follows: the first back angle (1-4) of the circumferential teeth of the cutter head part is 12 degrees, the second back angle (1-5) of the circumferential teeth of the cutter body part is 18 degrees, the front angle (1-6) of the circumferential teeth is 5 degrees +/-1 degree, the first tooth back width (1-7) of the circumferential teeth is 0.8mm, the second tooth back width (1-8) of the circumferential teeth is 1.6mm, and the tooth depth (1-9) of the circumferential teeth is 2 mm; the fillet relief angle (1-10) is 10 degrees +/-1 degree; the axial angle (1-11) of the end teeth is 2-3 degrees, the tooth groove angle (1-12) of the end teeth is 30 degrees, the first back angle (1-13) of the end teeth is 10 degrees +/-1 degree, the second back angle (1-14) of the end teeth is 18 degrees, the front angle (1-15) of the end teeth is 4 degrees +/-1 degrees, and the tooth back width (1-16) of the end teeth is 1 mm;
the alloy tool steel knife handle (2) is provided with a welding hole (2-1), a pin hole (2-2) and an exhaust hole (2-3); the welding hole (2-1) is arranged at one end of the alloy tool steel tool handle (2), the diameter of the welding hole is 0.2mm larger than the diameter (1-1) of the welding part, and the tolerance is controlled within +0.02 mm; the diameter of the pin hole (2-2) is 4mm, and the tolerance is H7 grade; the exhaust hole (2-3) is communicated with the welding hole (2-1);
the reinforcing pin (3) is selected according to the diameters of the cutter head and the cutter handle.
2. A welded structure end mill according to claim 1, characterized in that the diameter (1-1) of the welded portion is 10mm, and the tolerance is controlled to within-0.02 mm.
3. A welded structure end mill according to claim 1, characterized in that the pin recess (1-2) has a radius of 2mm and a tolerance of within +0.02 mm.
4. A welded structure end mill according to claim 1, characterized in that said helix angle (1-3) is 30 °.
5. A welded structure end mill according to claim 1, characterized in that said exhaust holes (2-3) have a diameter of 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121951488.8U CN216462026U (en) | 2021-08-19 | 2021-08-19 | Welded structure end mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121951488.8U CN216462026U (en) | 2021-08-19 | 2021-08-19 | Welded structure end mill |
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| CN216462026U true CN216462026U (en) | 2022-05-10 |
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| CN202121951488.8U Active CN216462026U (en) | 2021-08-19 | 2021-08-19 | Welded structure end mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113560646A (en) * | 2021-08-19 | 2021-10-29 | 沈阳飞机工业（集团）有限公司 | Welded structure end mill |
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2021
- 2021-08-19 CN CN202121951488.8U patent/CN216462026U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113560646A (en) * | 2021-08-19 | 2021-10-29 | 沈阳飞机工业（集团）有限公司 | Welded structure end mill |
| CN113560646B (en) * | 2021-08-19 | 2024-04-16 | 沈阳飞机工业（集团）有限公司 | End mill with welded structure |
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