A spiral T-shaped knife for metal surface treatment

Abstract

The present application proposes a spiral T-shaped knife for metal surface treatment, comprising a knife head and a knife handle, characterized in that the knife handle comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being constructed as cylindrical components, and the knife head being coaxially fixed at one end of the first connecting portion, and the second connecting portion being coaxially fixed at the other end of the first connecting portion; a plurality of first blade portions are provided on the knife head, the first blade portion being spirally extended with the axis of the knife handle as a reference, a first spiral groove being formed between two adjacent first blade portions, and a second spiral groove being provided through both ends of the first blade portion along the axis direction of the knife handle, the second spiral groove being spirally extended with the axis of the knife handle as a reference. The technical effect of this technical solution is that the second spiral groove is provided on the first blade portion, thereby increasing the chip removal capacity of the tool, and at the same time, circumferential tooth blades are formed on both sides of the width of the second spiral groove, thereby enhancing the processing efficiency of the metal.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface treatment tool technology, in particular to a spiral T-shaped knife for metal surface treatment. Background Art

[0002] In the manufacturing process of mechanical equipment, it is often necessary to machine keyways on the shaft of shaft components for use in subsequent assembly processes. Typically, keyways are machined using milling methods, primarily end mills and T-shaped milling cutters.

[0003] End mills machine keyways vertically on the part's shank, while T-shaped milling cutters machine keyways horizontally. Existing T-shaped milling cutters have a low feed rate, which affects the efficiency of metalworking operations. Therefore, a new technical solution is needed to address this issue. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention proposes a spiral T-shaped knife for metal surface treatment.

[0005] Specifically, the present application proposes a spiral T-shaped knife for metal surface treatment, comprising a knife head and a knife handle, characterized in that the knife handle comprises a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being configured as cylindrical components, and the knife head is coaxially fixed to one end of the first connecting portion, and the second connecting portion is coaxially fixed to the other end of the first connecting portion; wherein,

[0006] The cutter head is provided with a plurality of first blade portions, which are spirally extended with the axis of the handle as a reference, and a first spiral groove is formed between two adjacent first blade portions. The first blade portions are provided with second spiral grooves at both ends along the axis of the handle, and the second spiral grooves are spirally extended with the axis of the handle as a reference.

[0007] The technical effect of this technical solution is that a second spiral groove is provided on the first blade portion, thereby increasing the chip removal capacity of the tool, and at the same time, circumferential tooth lands are formed on both sides of the width of the second spiral groove, thereby increasing the number of circumferential tooth lands and enhancing the processing efficiency of metal.

[0008] Among them, the first blade portion forms end teeth along one end of the shank axis direction, and the end teeth have end tooth blades, so as to facilitate the processing of metal from the vertical direction; the first blade portion forms circumferential teeth along the radial outer edge of the cutter head, and the circumferential teeth have circumferential tooth blades, so as to facilitate the horizontal processing of metal.

[0009] Preferably, a transition conical surface is provided at the junction of the other end of the first connecting portion and the second connecting portion. The technical effect of this preferred embodiment is that it is used to prevent the second connecting portion from contacting the surface of the metal workpiece.

[0010] Furthermore, the diameter of the first connecting portion is smaller than the diameter of the second connecting portion.

[0011] Preferably, the spiral directions of the first spiral groove and the second spiral groove are opposite. The technical effect of this preferred embodiment is that while improving the chip removal and cutting capabilities of the milling cutter, the structural strength of the circumferential teeth is minimized.

[0012] Furthermore, the helical angles of the first spiral groove and the second spiral groove are different.

[0013] Preferably, the first spiral groove and the second spiral groove are connected, and the intersection of the first spiral groove and the second spiral groove forms an arc-shaped notch on the first blade portion. When the milling cutter rotates, metal chips generated during metal processing flow through the arc-shaped notch into the first spiral groove and the second spiral groove and are discharged, thereby improving the ability to discharge metal chips.

[0014] Preferably, the arc-shaped notch is located at the end of the cutter head along the axis of the handle.

[0015] Furthermore, one end of two adjacent first blade portions that is relatively far away from each other is respectively provided with an arc-shaped notch. The technical effect of this technical solution is that it is used to make the overall structure of the milling cutter more symmetrical, thereby improving the structural strength of the milling cutter.

[0016] Furthermore, the length of the arc-shaped notch along the axis of the shank is less than half the length of the cutter head. The technical effect of this technical solution is to make the machining surfaces of two adjacent first cutting edges on the metal workpiece overlap and connect, thereby avoiding the problem of machining dead corners in the workpiece.

[0017] Furthermore, one end of the knife handle away from the knife head is provided with a chamfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 or the description of the prior art.

[0019] Figure 1 Schematic diagram of the three-dimensional structure of a spiral T-shaped knife for metal surface treatment proposed in this embodiment;

[0020] Figure 2 1 is a schematic structural diagram of a spiral T-shaped knife for metal surface treatment proposed in this embodiment in a front view;

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle cutter head;

[0022] Figure 4 yes Figure 3 A schematic diagram of the structure of the left viewing direction;

[0023] Figure 5 This is a schematic diagram of the size numbers of a spiral T-shaped knife for metal surface treatment proposed in this embodiment;

[0024] Figure 6 Schematic diagram of the numbering of the circumferential tooth rake angle in this embodiment;

[0025] Figure 7 Schematic diagram of the numbering of the peripheral tooth clearance angle 1 and clearance angle 2 in this embodiment;

[0026] Figure 8 Schematic diagram of the numbering of the front angle of the end teeth in this embodiment.

[0027] The reference numerals in the accompanying drawings are as follows:

[0028] 11-first connecting portion; 12-second connecting portion; 13-cutter head; 14-first blade portion; 15-first spiral groove; 16-second spiral groove; 17-end tooth; 18-circumferential tooth; 19-transition cone surface; 20-arc-shaped notch. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 8 As shown, this embodiment proposes a spiral T-shaped knife for metal surface treatment, including a knife head 13 and a knife handle, characterized in that the knife handle includes a first connecting portion 11 and a second connecting portion 12, the first connecting portion 11 and the second connecting portion 12 are constructed as cylindrical components, and the knife head 13 is coaxially fixed to one end of the first connecting portion 11, and the second connecting portion 12 is coaxially fixed to the other end of the first connecting portion 11; wherein,

[0031] The cutter head 13 is provided with a plurality of first blade portions 14, each of which extends spirally about the axis of the handle. A first spiral groove 15 is formed between two adjacent first blade portions 14. Second spiral grooves 16 are formed through each end of the first blade portion 14 along the axis of the handle. The second spiral grooves 16 extend spirally about the axis of the handle. The second spiral grooves 16 divide each first blade portion 14 into two circumferential teeth 18.

[0032] The technical effect of this technical solution is that a second spiral groove 16 is provided on the first blade portion 14, thereby increasing the chip removal capacity of the tool, and at the same time, circumferential tooth lands are formed on both sides of the width of the second spiral groove 16, thereby increasing the number of circumferential tooth lands and thus enhancing the processing efficiency of metal.

[0033] Among them, the first blade portion 14 forms an end tooth 17 along one end of the shank axis direction, and the end tooth 17 has an end tooth blade band, so as to facilitate the processing of metal from the vertical direction; the first blade portion 14 forms a circumferential tooth 18 along the radial outer edge of the cutter head 13, and the circumferential tooth 18 has a circumferential tooth blade band, so as to facilitate the horizontal processing of metal.

[0034] As an implementation of this embodiment, a transition tapered surface 19 is provided at the junction of the other end of the first connecting portion 11 and the second connecting portion 12. The preferred technical effect of this embodiment is to prevent the second connecting portion 12 from contacting the surface of the metal workpiece.

[0035] Furthermore, the diameter of the first connecting portion 11 is smaller than the diameter of the second connecting portion 12 .

[0036] As an implementation of this embodiment, the spiral directions of the first spiral groove 15 and the second spiral groove 16 are opposite. The technical effect of this implementation is that it improves the chip removal and cutting capabilities of the milling cutter while minimizing the reduction in the structural strength of the peripheral teeth 18.

[0037] Furthermore, the helical angles of the first helical groove 15 and the second helical groove 16 are different.

[0038] As one implementation of this embodiment, the first spiral groove 15 and the second spiral groove 16 are connected, and the intersection of the first spiral groove 15 and the second spiral groove 16 forms an arc-shaped notch 20 on the first blade portion 14. When the milling cutter rotates, metal chips generated during metal processing flow through the arc-shaped notch 20 into the first spiral groove 15 and the second spiral groove 16 and are discharged, thereby improving the ability to discharge metal chips.

[0039] As an implementation of this embodiment, the arc-shaped notch 20 is located at the end of the cutter head 13 along the axis direction of the handle.

[0040] Furthermore, the ends of the two adjacent first blade portions 14 that are relatively far away are each provided with an arc-shaped notch 20. The technical effect of this technical solution is that it is used to make the overall structure of the milling cutter more symmetrical, thereby improving the structural strength of the milling cutter.

[0041] Furthermore, the length of the arc-shaped notch 20 along the axis of the shank is less than half the length of the cutter head 13. The technical effect of this technical solution is that it is used to make the processing surfaces of two adjacent first cutting edges 14 on the metal workpiece overlap and connect, thereby avoiding the problem of dead angle in the processing of local workpieces.

[0042] Furthermore, one end of the knife handle away from the knife head 13 is provided with a chamfer.

[0043] In addition, the parameters of the blade body of the T-shaped blade of this embodiment are as follows:

[0044] The total length of the blade body is L, the length of the blade head 13 is L1, and the length of the first connecting portion 11 is L 2， The width of the circumferential tooth land is L 3， The width of the tooth back angle is L4, and the chamfer radius of the tool handle is L 5， The diameter of the second connecting portion 12 is D ， The diameter of the rotating circular surface of the first blade portion 14 is D1, the diameter of the first connecting portion 11 is D2, the diameter of the core of the cutter head 13 is D3, the helix angle of the first spiral groove 15 is A1, the helix angle of the second spiral groove 16 is A, the angle of the transition cone 19 is A2, the peripheral tooth rake angle is A3, the peripheral tooth clearance angle 1 is A5, the peripheral tooth clearance angle 2 is A6, and the end tooth clearance angle is A4; the sizes of the above parameters are determined according to the size of the product and the process requirements. On the basis of this technical solution, the above parameters can be changed and combined in several ways.

[0045] Among them, the end tooth rake face, end tooth flank face 1, end tooth flank face 2, peripheral tooth rake face, peripheral tooth flank face 1 and peripheral tooth flank face 2 are respectively common technical terms in this field. For the sake of ease of understanding, this article still explains them. When the workpiece is processed in the vertical direction, in the same end tooth, the end tooth rake face is the first side to contact the workpiece, followed by the end tooth flank face 1 and the end tooth flank face 2 in sequence; when the workpiece is processed in the horizontal direction, in the same peripheral tooth, the peripheral tooth rake face is the first side to contact the workpiece, followed by the peripheral tooth flank face 1 and the peripheral tooth flank face 2 in sequence; the content of this paragraph is only to explain and illustrate the common technical terms, and does not involve the substantive content of the technical solution.

[0046] For those skilled in the art, several variations and improvements can be made without departing from the inventive concept of the present invention, and all of these fall within the scope of protection of the present invention.

Claims

1. A spiral T-shaped knife for metal surface treatment, comprising a knife head and a knife handle, characterized in that: The knife handle includes a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are cylindrical components, and the cutter head is coaxially fixed to one end of the first connecting portion, and the second connecting portion is coaxially fixed to the other end of the first connecting portion; wherein, The cutter head is provided with a plurality of first blade portions, each of which is spirally extended with respect to the axis of the handle, and a first spiral groove is formed between two adjacent first blade portions. Second spiral grooves are formed through both ends of the first blade portion along the axis of the handle, and the second spiral grooves are spirally extended with respect to the axis of the handle; The first spiral groove and the second spiral groove are connected to each other, and an arc-shaped notch is formed on the first blade portion at the connection between the first spiral groove and the second spiral groove; A transition conical surface is provided at the junction of the other end of the first connecting portion and the second connecting portion.

2. The spiral T-shaped blade for metal surface treatment according to claim 1, characterized in that: A diameter of the first connecting portion is smaller than a diameter of the second connecting portion.

3. The spiral T-shaped blade for metal surface treatment according to claim 1, characterized in that: The spiral directions of the first spiral groove and the second spiral groove are opposite to each other.

4. The spiral T-shaped blade for metal surface treatment according to claim 3, characterized in that: The first spiral groove and the second spiral groove have different helical angles.

5. The spiral T-shaped blade for metal surface treatment according to claim 1, characterized in that: The length of the arc-shaped notch along the axis of the shank is less than half the length of the cutter head.

6. The spiral T-shaped blade for metal surface treatment according to claim 1, characterized in that: One end of the knife handle away from the knife head is provided with a chamfer.

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