Expanding and reaming integrated cutter

Abstract

A reaming cutting edge is arranged at the foremost end of an edge portion and connected with a handle portion through a main edge belt, a reaming cutting edge is arranged on the side edge of the reaming cutting edge and connected with the handle portion through an auxiliary edge belt, and the main edge belt and the auxiliary edge belt are both spirally arranged along the central axis of the handle portion. A main chip groove is formed in the side edge of the main edge strip, an auxiliary chip groove is formed in the side edge of the auxiliary edge strip, and the reaming cutting edges and the reaming cutting edges are arranged in a stepped mode, so that the distance between the reaming cutting edges and the end face of the edge part is smaller than that between the reaming cutting edges and the end face of the edge part, multi-layer high-precision cutting is achieved, the cutting resistance is small, and the chip removal performance is greatly improved. The end face of the reaming cutting edge is a chamfer, the tipping probability is reduced, the abrasion resistance is improved, and the structural strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of precision machining, and more specifically, to a combined reaming and enlarging tool. Background Art

[0002] During tool machining, high-precision holes usually need to be enlarged using a precision reaming drill bit to make the holes reach the preset inner diameter range, and then the inner wall surface of the holes is secondarily enlarged by a finishing tool to make the inner diameter uniform, reduce the error value of the inner diameter of the holes, and more accurately reach the required default value to complete high-precision drilling operations.

[0003] In the prior art, the tool closest to the present application is the one with the publication number: CN106424856A, a combined tool, which discloses that the machining part sequentially includes a drilling part, an enlarging part, and a reaming part. The surface of the machining part has several helically extending cutting edges, and chip flutes are formed between the cutting edges.

[0004] The existing tools can perform rough and finish machining in one, but the cutting accuracy is still insufficient, and the wear resistance is low, and the tool is prone to chipping.

[0005] In view of this, the utility model provides a combined reaming and enlarging tool with high precision and high structural strength. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a combined reaming and enlarging tool with high precision and high structural strength.

[0007] A combined reaming and enlarging tool includes a shank 1 and a cutting edge part 2. The central axes of the shank 1 and the cutting edge part 2 are on the same straight line. It is characterized in that: the cutting edge part 2 includes a hole enlarging cutting edge 3 and a hole reaming cutting edge 4 arranged in sequence. The central axes of the hole enlarging cutting edge 3 and the hole reaming cutting edge 4 are on the same straight line as the central axis of the shank 1. The hole enlarging cutting edge 3 is provided at the forefront of the cutting edge part 2. The hole enlarging cutting edge 3 is connected to the shank 1 through a main cutting edge band 5. A hole reaming cutting edge 4 is provided on the side of the hole enlarging cutting edge 3. The hole reaming cutting edge 4 is connected to the shank 1 through a secondary cutting edge band 6. Both the main cutting edge band 5 and the secondary cutting edge band 6 are helically arranged along the central axis of the shank 1. A main chip flute 7 is provided on the side of the main cutting edge band 5, and a secondary chip flute 8 is provided on the side of the secondary cutting edge band 6. The distance between the hole enlarging cutting edge 3 and the end face of the cutting edge part 2 is less than the distance between the hole reaming cutting edge 4 and the end face of the cutting edge part 2.

[0008] Further, the difference between the distance between the hole enlarging cutting edge 3 and the end face of the cutting edge part 2 and the distance between the hole reaming cutting edge 4 and the end face of the cutting edge part 2 is 0.5 mm.

[0009] In some embodiments, the diameters of the hole enlarging cutting edge 3 and the hole reaming cutting edge 4 are the same, so that the machining hole diameters are the same.

[0010] In some embodiments, the end face of the reaming cutting edge 4 is chamfered to reduce the probability of chipping and improve wear resistance.

[0011] Furthermore, the chamfer angle of the end face of the reaming cutting edge 4 is 75°.

[0012] In some embodiments, a chip pocket 9 is further provided below the main chip groove 7 to facilitate increasing the chip accommodation space for chip evacuation.

[0013] In some embodiments, the width of the main flank 5 is greater than the width of the secondary flank 6.

[0014] Furthermore, the width of the secondary flank 6 is less than 0.02 mm.

[0015] The beneficial effects of the present utility model: The present utility model provides an integrated reaming and enlarging forming tool. The frontmost end of the cutting edge 2 is provided with an enlarging cutting edge 3. The enlarging cutting edge 3 is connected to the shank 1 through the main flank 5. A reaming cutting edge 4 is provided on the side of the enlarging cutting edge 3. The reaming cutting edge 4 is connected to the shank 1 through the secondary flank 6. Both the main flank 5 and the secondary flank 6 are helically arranged along the central axis of the shank 1. A main chip groove 7 is provided on the side of the main flank 5, and a secondary chip groove 8 is provided on the side of the secondary flank 6. The enlarging cutting edge 3 and the reaming cutting edge 4 are arranged in a stepped manner, such that the distance between the enlarging cutting edge 3 and the end face of the cutting edge 2 is less than the distance between the reaming cutting edge 4 and the end face of the cutting edge 2. Multi-layer high-precision cutting is achieved with small cutting resistance, greatly improving the chip evacuation performance. The end face of the reaming cutting edge 4 is chamfered to reduce the probability of chipping, improve wear resistance, and enhance the structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of an integrated reaming and enlarging forming tool of the present application.

[0017] Figure 2 FIG. is a partial structural diagram of an integrated reaming and enlarging forming tool of the present application.

[0018] DESCRIPTION OF THE MAIN REFERENCE SIGNS

[0019] Shank 1, cutting edge 2, enlarging cutting edge 3, reaming cutting edge 4, main flank 5, secondary flank 6, main chip groove 7, secondary chip groove 8, chip pocket 9.

[0020] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. SPECIFIC EMBODIMENTS

[0021] The following embodiments are described to assist in understanding the present application. The embodiments should not be construed in any way as limiting the scope of protection of the present application.

[0022] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or integrated together (including being integrated within a single system or component).

[0023] Meanwhile, the connections between components or systems are not intended to be limited to direct connections. Instead, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Example 1:

[0024] As Figure 1 shown, it is a schematic structural diagram of a reaming and expanding integrated forming tool of the present application; as Figure 2 shown, it is a partial structural diagram of a reaming and expanding integrated forming tool of the present application.

[0025] A reaming and expanding integrated forming tool includes a shank 1 and a cutting edge 2. The central axes of the shank 1 and the cutting edge 2 are on the same straight line. It is characterized in that: the cutting edge 2 includes a hole expanding cutting edge 3 and a reaming cutting edge 4 arranged in sequence. The central axes of the hole expanding cutting edge 3 and the reaming cutting edge 4 are on the same straight line as the central axis of the shank 1. The hole expanding cutting edge 3 is provided at the forefront of the cutting edge 2. The hole expanding cutting edge 3 is connected to the shank 1 through a main cutting edge band 5. A reaming cutting edge 4 is provided on the side of the hole expanding cutting edge 3. The reaming cutting edge 4 is connected to the shank 1 through a secondary cutting edge band 6. Both the main cutting edge band 5 and the secondary cutting edge band 6 are spirally arranged along the central axis of the shank 1. A main chip groove 7 is provided on the side of the main cutting edge band 5. A secondary chip groove 8 is provided on the side of the secondary cutting edge band 6. The distance between the hole expanding cutting edge 3 and the end face of the cutting edge 2 is less than the distance between the reaming cutting edge 4 and the end face of the cutting edge 2.

[0026] The difference between the distance between the hole expanding cutting edge 3 and the end face of the cutting edge 2 and the distance between the reaming cutting edge 4 and the end face of the cutting edge 2 is 0.5 mm.

[0027] The hole expanding cutting edge 3 and the reaming cutting edge 4 have the same diameter, so that the processed hole diameters are the same.

[0028] The end face of the reaming cutting edge 4 is chamfered to reduce the probability of chipping and improve wear resistance.

[0029] The chamfer angle of the end face of the reaming cutting edge 4 is 75°.

[0030] A chip pocket 9 is also provided below the main chip groove 7 to facilitate increasing the chip pocket space for chip evacuation.

[0031] The width of the main cutting edge band 5 is greater than the width of the secondary cutting edge band 6.

[0032] The width of the secondary cutting edge 6 is less than 0.02 mm.

[0033] Advantages of the present utility model: The present utility model provides a combined reaming and forming cutter. The front end of the cutting edge 2 is provided with a hole-expanding cutting edge 3. The hole-expanding cutting edge 3 is connected to the shank 1 through the main cutting edge band 5. A reaming cutting edge 4 is arranged on the side of the hole-expanding cutting edge 3. The reaming cutting edge 4 is connected to the shank 1 through the secondary cutting edge band 6. Both the main cutting edge band 5 and the secondary cutting edge band 6 are spirally arranged along the central axis of the shank 1. A main chip removal groove 7 is arranged on the side of the main cutting edge band 5, and a secondary chip removal groove 8 is arranged on the side of the secondary cutting edge band 6. The hole-expanding cutting edge 3 and the reaming cutting edge 4 are arranged in a stepped manner, so that the distance between the hole-expanding cutting edge 3 and the end face of the cutting edge 2 is less than the distance between the reaming cutting edge 4 and the end face of the cutting edge 2, enabling multi-layer high-precision cutting with small cutting resistance, greatly improving the chip removal performance; the end face of the reaming cutting edge 4 is chamfered, reducing the probability of chipping, improving wear resistance, and enhancing the structural strength.

[0034] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustrative purposes and are not intended to limit the present application. The actual protection scope of the present application is subject to the claims.

[0035] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustrative purposes and are not intended to limit the present application. The actual protection scope of the present application is subject to the claims.

Claims

1. A one-piece expanding and reaming tool, comprising a handle (1) and a blade (2), wherein the central axes of the handle (1) and the blade (2) are in the same straight line, and characterized in that: The blade portion (2) comprises a hole-expanding cutting edge (3) and a reaming cutting edge (4) which are arranged in sequence. The central axes of the hole-expanding cutting edge (3) and the reaming cutting edge (4) are in a straight line with the central axis of the shank portion (1). The front end of the blade portion (2) is provided with a hole-expanding cutting edge (3). The hole-expanding cutting edge (3) is connected to the shank portion (1) via a main edge band (5). The side of the hole-expanding cutting edge (3) is provided with a reaming cutting edge (4). The reaming cutting edge (4) is connected to the shank portion (1) via a secondary edge band (6). Both the main edge band (5) and the secondary edge band (6) are arranged in a spiral along the central axis of the shank portion (1). The side of the main edge band (5) is provided with a main chip removal groove (7). The side of the secondary edge band (6) is provided with a secondary chip removal groove (8). The distance between the hole-expanding cutting edge (3) and the end face of the blade portion (2) is smaller than the distance between the reaming cutting edge (4) and the end face of the blade portion (2).

2. The expansion and reaming integrated tool according to claim 1, characterized in that: The difference between the distance between the hole-expanding cutting edge (3) and the end face of the blade portion (2) and the distance between the hole-reaming cutting edge (4) and the end face of the blade portion (2) is 0.5 mm.

3. The expansion and reaming integrated tool according to claim 1, characterized in that: The diameters of the hole enlarging cutting edge (3) and the hole reaming cutting edge (4) are the same, so that the processed hole diameters are the same.

4. The expansion and reaming integrated tool according to claim 1, characterized in that: The end surface of the reaming cutting edge (4) is chamfered, thereby reducing the probability of chipping and improving wear resistance.

5. The expansion and reaming integrated tool according to claim 1, characterized in that: The end face of the reaming cutting edge (4) is chamfered at 75°.

6. The expansion and reaming integrated tool according to claim 1, characterized in that: A chip containing groove (9) is also provided below the main chip removal groove (7) to increase the chip containing space and facilitate chip removal.

7. The expansion and reaming integrated tool according to claim 1, characterized in that: The width of the main edge band (5) is greater than the width of the secondary edge band (6).

8. The expansion and reaming integrated tool according to claim 1, characterized in that: The width of the secondary edge band (6) is less than 0.02 mm.

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