Drilling reamer

Abstract

The utility model belongs to the technical field of hole machining, and particularly relates to a drilling reamer which comprises a reamer handle, a reamer body and reamer teeth, the reamer body is connected with the reamer handle, the reamer teeth are connected with the reamer body, a second working part of the reamer teeth is located between a first working part and a third working part, the top face of the first working part is a first chip removal face, and the top face of the second working part is a second chip removal face. The top face of the third working part is a third chip removal face, a first cutting edge is formed on one side of the first chip removal face in the width direction, a second cutting edge is formed on one side of the second chip removal face in the width direction, a third cutting edge is formed on one side of the third chip removal face in the width direction, and the first cutting edge, the second cutting edge and the third cutting edge are located on the same side of the cutter body. The first chip removal face, the second chip removal face and the third chip removal face are sequentially lifted, the first cutting edge is used for drilling a workpiece to form an inner hole, and the second cutting edge and the third cutting edge are used for cutting the hole wall. And the step-shaped inner hole can be machined on the workpiece without replacing the cutter back and forth.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hole processing technical field, especially relate to a drill reamer. BACKGROUND

[0002] The reamer is a kind of rotating cutter to remove the thin layer of metal on the surface of the processed hole, for hole expansion or hole repair.

[0003] The reamer includes handle, cutter body and cutter tooth, cutter body is connected with handle, cutter tooth is arranged on the outer periphery of cutter body, the side of cutter tooth away from cutter body has cutting edge, handle is used to be connected with machine tool, handle is driven to rotate by machine tool to drive cutter body to rotate, when cutter body rotates, the cutting edge of cutter tooth will mill the inner wall of hole, to improve the accuracy of hole.

[0004] However, the existing hole processing mode needs to be rough machined by drill bit to form inner hole on workpiece first, then reamer is used to finish machining inner hole, when processing stepped inner hole, reamer with different diameters is needed to finish machining inner hole, and operation efficiency is low. SUMMARY

[0005] The utility model relates to the technical problem that the existing hole processing mode needs to use reamer with different diameters to finish machining inner hole when processing stepped inner hole, and the problem of low operation efficiency is solved, and a drill reamer is provided.

[0006] To solve the above technical problem, the utility model embodiment provides a drill reamer, including handle, cutter body and cutter tooth, the cutter body is connected with the handle, the cutter tooth is connected on the outer periphery of the cutter body, the cutter tooth includes first working part, second working part and third working part, the second working part is located between the first working part and the third working part, the top surface of the first working part is first chip removal surface, the top surface of the second working part is second chip removal surface, the top surface of the third working part is third chip removal surface;

[0007] The side of the width direction of the first chip removal surface forms first cutting edge, the side of the width direction of the second chip removal surface forms second cutting edge, the side of the width direction of the third chip removal surface forms third cutting edge, the first cutting edge, second cutting edge and third cutting edge are located on the same side of the cutter body;

[0008] The first chip removal surface, the second chip removal surface and the third chip removal surface are arranged in a stepped manner, and the first chip removal surface, the second chip removal surface and the third chip removal surface are sequentially raised.

[0009] The first cutting edge is used to drill workpiece when the drill reamer rotates, to form inner hole on workpiece, the second cutting edge and the third cutting edge are used to cut the hole wall of inner hole on workpiece.

[0010] Optionally, two of the cutting teeth are provided, the two cutting teeth being a first cutting tooth and a second cutting tooth, the first cutting tooth and the second cutting tooth being arranged on opposite sides of the axis of the shank;

[0011] Along the axis of the shank, a first cutting edge of the first cutting tooth and a first cutting edge of the second cutting tooth are oppositely arranged, a second cutting edge of the first cutting tooth and a second cutting edge of the second cutting tooth are oppositely arranged, and a third cutting edge of the first cutting tooth and a third cutting edge of the second cutting tooth are oppositely arranged.

[0012] Optionally, along the length direction of the shank, the length of the third cutting edge of the first cutting tooth is greater than the length of the third cutting edge of the second cutting tooth.

[0013] Optionally, the first, second and third chip surfaces are all planes, the first chip surface is parallel to the axis of the shank, the second chip surface is parallel to the axis of the shank, the third chip surface is parallel to the axis of the shank, a first transition surface is provided between the first chip surface and the second chip surface, and a second transition surface is provided between the second chip surface and the third chip surface.

[0014] Optionally, the width of the third chip surface of the first cutting tooth is greater than the width of the third chip surface of the second cutting tooth.

[0015] Optionally, the first transition surface of the first cutting tooth is an inclined surface that is inclined from a side close to the second chip surface to a side away from the second chip surface, the top side of the first transition surface of the first cutting tooth is closer to the shank than the bottom side, the first transition surface of the second cutting tooth is an inclined surface that is inclined from a side close to the second chip surface to a side away from the second chip surface, and the top side of the first transition surface of the second cutting tooth is closer to the shank than the bottom side.

[0016] Optionally, the second transition surface of the first cutting tooth is a plane perpendicular to the axis of the shank, and the second transition surface of the second cutting tooth is a plane perpendicular to the axis of the shank.

[0017] Optionally, the first working part further comprises an end chip surface, the end chip surface is a plane and forms an obtuse angle with the first chip surface, an end of the end chip surface away from the first chip surface forms a tip, and the axis of the shank passes through the tip.

[0018] The end chip surface is triangular.

[0019] Optionally, the outer circumferential surface of the shank is higher than the third chip surface to form a fourth chip surface between the third chip surface and the shank, the fourth chip surface is inclined from the side close to the cutter body to the side close to the third chip surface, the top side of the fourth chip surface is closer to the shank than the bottom side, and the fourth chip surface is a concave arc surface.

[0020] Optionally, a chip groove is arranged between the first side of the width direction of the first cutter tooth and the first side of the second cutter tooth and between the second side of the width direction of the first cutter tooth and the second side of the second cutter tooth, and the chip groove gradually approaches the axis of the shank from the outside.

[0021] According to the drill-reamer provided in the embodiment of the present application, when the drill-reamer rotates, the first cutting edge on the first working part of the cutter tooth first contacts the workpiece to perform drilling operation on the workpiece to form an inner hole on the workpiece, then the second cutting edge on the second working part cuts the hole wall of the inner hole to perform finish machining on the inner hole, and finally the third cutting edge on the third working part performs cutting operation on the finish-machined inner hole to process a step on the hole wall of the inner hole, compared with the prior art, the step-shaped inner hole can be processed on the workpiece without back-and-forth replacement of the cutter, the operation is simple, and the work efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Fig. 1 is a structural schematic view of a drill-reamer according to an embodiment of the present application;

[0023] Figure 2 Fig. 2 is a structural schematic view of the drill-reamer according to another embodiment of the present application; Figure 1 Fig. 3 is a structural schematic view of the drill-reamer according to another embodiment of the present application.

[0024] The reference signs in the description are as follows: 1, shank; 2, cutter body; 3, chip groove; 4, first cutter tooth; 5, second cutter tooth; 6, first working part; 7, first cutting edge; 8, first chip surface; 9, second working part; 10, second cutting edge; 11, second chip surface; 12, third working part; 13, third cutting edge; 14, third chip surface; 15, end chip surface; 16, first transition surface; 17, second transition surface; 18, fourth chip surface. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0026] As Figure 1 and Figure 2The utility model discloses an embodiment provides a drill reamer, including handle 1, tool body 2 and tool tooth, tool body 2 with handle 1 is connected, the tool tooth is connected on the outer periphery of tool body 2, the tool tooth includes first working part 6, second working part 9 and third working part 12, second working part 9 is located between first working part 6 and third working part 12, the top surface of first working part 6 is first chip removal face 8, the top surface of second working part 9 is second chip removal face 11, the top surface of third working part 12 is third chip removal face 14.

[0027] The width direction of first chip removal face 8 forms first cutting edge 7, the width direction of second chip removal face 11 forms second cutting edge 10, the width direction of third chip removal face 14 forms third cutting edge 13, first cutting edge 7, second cutting edge 10 and third cutting edge 13 are located at the same side of tool body 2.

[0028] First chip removal face 8, second chip removal face 11 and third chip removal face 14 are arranged in a stepped manner, and first chip removal face 8, second chip removal face 11 and third chip removal face 14 are sequentially raised.

[0029] First cutting edge 7 is used for drilling workpieces when the drill reamer rotates to form an inner hole on the workpiece, and second cutting edge 10 and third cutting edge 13 are used for cutting the hole wall of the inner hole on the workpiece.

[0030] Specifically, the vertical distance between first cutting edge 7 and the axis of handle 1 is less than the vertical distance between second cutting edge 10 and the axis of handle 1, that is, the outer diameter of first cutting edge 7 is less than the outer diameter of second cutting edge 10, and the vertical distance between second cutting edge 10 and the axis of handle 1 is less than the vertical distance between third cutting edge 13 and the axis of handle 1, that is, the outer diameter of second cutting edge 10 is less than the outer diameter of third cutting edge 13. When the drill reamer rotates, first cutting edge 7 on first working part 6 of the tool tooth will first contact the workpiece to perform drilling operations on the workpiece to form an inner hole on the workpiece, then second cutting edge 10 on second working part 9 will cut the hole wall of the inner hole to achieve fine machining of the inner hole, and finally third cutting edge 13 on third working part 12 will perform cutting operations again on the machined inner hole to machine a step on the hole wall of the inner hole.

[0031] First chip removal face 8, second chip removal face 11 and third chip removal face 14 have gaps between them and the hole wall of the inner hole, and the generated chips will be sequentially discharged from the inner hole through the gaps between first chip removal face 8, second chip removal face 11 and third chip removal face 14 and the inner hole, avoiding the influence of the chips on the accuracy of the inner hole. Without the need to replace the tool back and forth, a stepped inner hole can be machined on the workpiece, which is simple to operate and can improve work efficiency.

[0032] In an embodiment, two said cutting teeth are provided, which are a first cutting tooth 4 and a second cutting tooth 5, and said first cutting tooth 4 and said second cutting tooth 5 are arranged on opposite sides of the axis of said shank 1.

[0033] Along the axis of said shank 1, a first cutting edge 7 of said first cutting tooth 4 and a first cutting edge 7 of said second cutting tooth 5 are arranged oppositely, a second cutting edge 10 of said first cutting tooth 4 and a second cutting edge 10 of said second cutting tooth 5 are arranged oppositely, and a third cutting edge 13 of said first cutting tooth 4 and a third cutting edge 13 of said second cutting tooth 5 are arranged oppositely.

[0034] Specifically, said first cutting tooth 4 and said second cutting tooth 5 are arranged oppositely on said body 2, and a first cutting edge 7, a second cutting edge 10 and a third cutting edge 13 of said first cutting tooth 4 are arranged oppositely in sequence with a first cutting edge 7, a second cutting edge 10 and a third cutting edge 13 of said second cutting tooth 5. During one rotation of said drill and reamer, the same position of a workpiece can be cut twice, and the working efficiency can be improved. In addition, the arrangement of said first cutting tooth 4 and said second cutting tooth 5 oppositely can also improve the stability of said drill and reamer during rotation, and avoid radial runout of said drill and reamer.

[0035] In an embodiment, said first, second and third chip-removing surfaces 8, 11 and 14 are all flat surfaces, said first chip-removing surface 8 is parallel to the axis of said shank 1, said second chip-removing surface 11 is parallel to the axis of said shank 1, said third chip-removing surface 14 is parallel to the axis of said shank 1, a first transition surface 16 is arranged between said first chip-removing surface 8 and said second chip-removing surface 11, and a second transition surface 17 is arranged between said second chip-removing surface 11 and said third chip-removing surface 14.

[0036] The first transition surface 16 of said first cutting tooth 4 is an inclined surface that is inclined from a side close to said second chip-removing surface 11 to a side away from said second chip-removing surface 11, and a top side of said first transition surface 16 of said first cutting tooth 4 is closer to said shank 1 than a bottom side thereof. The first transition surface 16 of said second cutting tooth 5 is an inclined surface that is inclined from a side close to said second chip-removing surface 11 to a side away from said second chip-removing surface 11, and a top side of said first transition surface 16 of said second cutting tooth 5 is closer to said shank 1 than a bottom side thereof.

[0037] Specifically, the first cutting edge 7, the second cutting edge 10 and the third cutting edge 13 of the first tooth 4 are arranged on the long side of the first chip surface 8, the second chip surface 11 and the third chip surface 14 of the first tooth 4 in sequence, the long side of the first chip surface 8, the second chip surface 11 and the third chip surface 14 of the first tooth 4 provided with the cutting edge is slightly higher than the other long side, the first cutting edge 7, the second cutting edge 10 and the third cutting edge 13 of the second tooth 5 are arranged on the long side of the first chip surface 8, the second chip surface 11 and the third chip surface 14 of the second tooth 5 in sequence, the long side of the first chip surface 8, the second chip surface 11 and the third chip surface 14 of the second tooth 5 provided with the cutting edge is slightly higher than the other long side.

[0038] During the drilling and reaming operation, the first chip surface 8, the second chip surface 11 and the third chip surface 14 have a gap with the hole wall of the inner hole, and the generated chips pass through the first chip surface 8, the first transition surface 16, the second chip surface 11, the second transition surface 17 and the gap between the third chip surface 14 and the inner hole in sequence to be discharged from the inner hole, so as to avoid affecting the accuracy of the inner hole, and the first transition surface 16 and the second transition surface 17 can improve the continuity of chip discharge and the continuity of the operation between the first cutting edge 7 and the second cutting edge 10 and between the second cutting edge 10 and the third cutting edge 13, thereby facilitating cutting.

[0039] The first transition surface 16 of the first tooth 4 and the first transition surface 16 of the second tooth 5 are symmetrical about the tool body 2, the first transition surface 16 is inclined to facilitate the movement of the chips from the first chip surface 8 to the position of the second chip surface 11, the second transition surface 17 is inclined to facilitate the movement of the chips from the second chip surface 11 to the position of the third chip surface 14, in addition, the first transition surface 16 is provided with a first transition cutting edge, the second transition surface 17 is provided with a second transition cutting edge, the first transition cutting edge is connected between the first cutting edge 7 and the second cutting edge 10, and the second transition cutting edge is connected between the second cutting edge 10 and the third cutting edge 13, thereby facilitating cutting.

[0040] In an embodiment, the width of the third chip surface 14 of the first tooth 4 is greater than the width of the third chip surface 14 of the second tooth 5.

[0041] In the length direction of the tool body 2, the length of the third cutting edge 13 of the first tooth 4 is greater than the length of the third cutting edge 13 of the second tooth 5.

[0042] The second transition surface 17 of the first tooth 4 is a plane perpendicular to the axis of the tool shank 1, and the second transition surface 17 of the second tooth 5 is a plane perpendicular to the axis of the tool shank 1.

[0043] Specifically, in the length direction of the blade body 2, the length of the third cutting edge 13 of the first blade tooth 4 is greater than the length of the third cutting edge 13 of the second blade tooth 5, which means that the end of the third cutting edge 13 of the first blade tooth 4 away from the second cutting edge 10 is flush with the end of the third cutting edge 13 of the second blade tooth 5 away from the second cutting edge 10, and the vertical distance between the end of the third cutting edge 13 of the first blade tooth 4 close to the second cutting edge 10 and the shank 1 is greater than the vertical distance between the end of the third cutting edge 13 of the second blade tooth 5 close to the second cutting edge 10 and the shank 1.

[0044] The width of the third chip surface 14 of the first blade tooth 4 is greater than the width of the third chip surface 14 of the second blade tooth 5, which means that in the direction perpendicular to the axis of the blade body 2, the length of the third chip surface 14 of the first blade tooth 4 is greater than the length of the third chip surface 14 of the second blade tooth 5.

[0045] The second transition surface 17 of the first blade tooth 4 is a plane perpendicular to the axis of the shank 1, and the second transition surface 17 of the second blade tooth 5 is a plane perpendicular to the axis of the shank 1. The third cutting edge 13 on the third working part 12 on the second blade tooth 5 is used to perform cutting operation on the inner hole after finish machining to process a step on the hole wall of the inner hole, and the step at this time is a circular arc surface. The third cutting edge 13 of the third working part 12 on the first blade tooth 4 will cut the circular arc surface to form a step surface.

[0046] In an embodiment, the first working part 6 is also provided with an end chip surface 15, the end chip surface 15 is a plane and the included angle between the end chip surface 15 and the first chip surface 8 is obtuse, the end of the end chip surface 15 away from the first chip surface 8 forms a tip, the axis of the shank 1 passes through the tip, and the end chip surface 15 is triangular.

[0047] Specifically, the end chip surface 15 is triangular, and the end chip surface 15 is inclined to facilitate the movement of the chip to the position of the first chip surface 8.

[0048] In an embodiment, the outer circumferential surface of the shank 1 is higher than the third chip surface 14 to form a fourth chip surface 18 between the third chip surface 14 and the shank 1, the fourth chip surface 18 is inclined from the side close to the blade body 2 to the side close to the third chip surface 14, the top side of the fourth chip surface 18 is closer to the shank 1 than the bottom side, and the fourth chip surface 18 is a concave arc surface.

[0049] Specifically, the fourth chip surface 18 is inclined from the side close to the shank 1 to the side close to the third chip surface 14, and the fourth chip surface 18 is an arc surface, which is smooth and facilitates the discharge of the chip from the third chip surface 14 to the inner hole through the fourth chip surface 18.

[0050] In an embodiment, a first side of the first blade tooth 4 in the width direction and a first side of the second blade tooth 5 are provided with a chip removal groove 3, and a second side of the first blade tooth 4 in the width direction and a second side of the second blade tooth 5 are provided with a chip removal groove 3, and the chip removal groove 3 gradually approaches the axis of the tool holder 1 from the outside.

[0051] Specifically, a first side of the first blade tooth 4 in the width direction and a first side of the second blade tooth 5 are provided with a chip removal groove 3, and a second side of the first blade tooth 4 in the width direction and a second side of the second blade tooth 5 are provided with a chip removal groove 3, and the chip removal groove 3 gradually approaches the axis of the tool holder 1 from the outside. The first blade edge 7, the second blade edge 10 and the third blade edge 13 of the first blade tooth 4 are arranged on the first side of the first blade tooth 4 in the width direction, the first blade edge 7, the second blade edge 10 and the third blade edge 13 of the second blade tooth 5 are arranged on the second side of the first blade tooth 4 in the width direction, and the chip removal groove 3 is arranged between the first blade tooth 4 and the second blade tooth 5, and the groove wall of the chip removal groove 3 is arc-shaped, facilitating the removal of chips from the inner hole.

[0052] The drill-reamer of the embodiment of the utility model has the following working principle:

[0053] When the drill-reamer rotates, the first blade edge 7 on the first working part 6 of the blade tooth will first contact the workpiece, drills the workpiece to form an inner hole on the workpiece, then the second blade edge 10 on the second working part 9 will cut the hole wall of the inner hole to realize the finish machining of the inner hole, then the third blade edge 13 on the third working part 12 on the second blade tooth 5 will again cut the finish-machined inner hole to machine a step on the hole wall of the inner hole, at this time, the step is an arc surface, and the third blade edge 13 on the third working part 12 on the first blade tooth 4 will cut the arc surface to form a step surface.

[0054] The drill-reamer of the embodiment of the utility model has the following working principle:

[0055] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A drill reamer, characterized in that, The drill reamer comprises a shank (1), a body (2) and a tooth, the body (2) is connected with the shank (1), the tooth is connected on the outer periphery of the body (2), the tooth comprises a first working part (6), a second working part (9) and a third working part (12), the second working part (9) is located between the first working part (6) and the third working part (12), the top surface of the first working part (6) is a first chip surface (8), the top surface of the second working part (9) is a second chip surface (11), and the top surface of the third working part (12) is a third chip surface (14). One side of the width direction of the first chip surface (8) forms a first cutting edge (7), one side of the width direction of the second chip surface (11) forms a second cutting edge (10), and one side of the width direction of the third chip surface (14) forms a third cutting edge (13), and the first cutting edge (7), the second cutting edge (10) and the third cutting edge (13) are located on the same side of the body (2). The first chip surface (8), the second chip surface (11) and the third chip surface (14) are arranged in a stepped manner, and the first chip surface (8), the second chip surface (11) and the third chip surface (14) are raised in sequence. The first cutting edge (7) is used for drilling the workpiece when the drill reamer rotates to form an inner hole on the workpiece, and the second cutting edge (10) and the third cutting edge (13) are used for cutting the hole wall of the inner hole on the workpiece.

2. The drill reamer of claim 1, wherein, The tooth is provided with two first teeth (4) and second teeth (5), the first teeth (4) and the second teeth (5) are arranged on the opposite sides of the axis of the shank (1). Along the axis of the shank (1), the first cutting edge (7) of the first tooth (4) and the first cutting edge (7) of the second tooth (5) are oppositely arranged, the second cutting edge (10) of the first tooth (4) and the second cutting edge (10) of the second tooth (5) are oppositely arranged, and the third cutting edge (13) of the first tooth (4) and the third cutting edge (13) of the second tooth (5) are oppositely arranged.

3. The drill reamer of claim 2, wherein, Along the length direction of the body (2), the length of the third cutting edge (13) of the first tooth (4) is greater than the length of the third cutting edge (13) of the second tooth (5).

4. The drill reamer of claim 3, wherein, The first chip surface (8), the second chip surface (11) and the third chip surface (14) are all planes, the first chip surface (8) is parallel to the axis of the shank (1), the second chip surface (11) is parallel to the axis of the shank (1), the third chip surface (14) is parallel to the axis of the shank (1), a first transition surface (16) is arranged between the first chip surface (8) and the second chip surface (11), and a second transition surface (17) is arranged between the second chip surface (11) and the third chip surface (14).

5. The drill reamer of claim 4, wherein, The width of the third chip surface (14) of the first tooth (4) is greater than the width of the third chip surface (14) of the second tooth (5).

6. The drill reamer of claim 4, wherein, The first transition surface (16) of the first insert (4) is a slope inclined from the side close to the second chip surface (11) to the side away from the second chip surface (11), the top side of the first transition surface (16) of the first insert (4) is closer to the shank (1) than the bottom side, the first transition surface (16) of the second insert (5) is a slope inclined from the side close to the second chip surface (11) to the side away from the second chip surface (11), the top side of the first transition surface (16) of the second insert (5) is closer to the shank (1) than the bottom side.

7. The drill reamer of claim 6, wherein, The second transition surface (17) of the first insert (4) is a plane perpendicular to the axis of the shank (1), and the second transition surface (17) of the second insert (5) is a plane perpendicular to the axis of the shank (1).

8. The drill reamer of claim 4, wherein, The first working part (6) is further provided with an end chip surface (15), the end chip surface (15) is a plane and forms an obtuse angle with the first chip surface (8), the end of the end chip surface (15) away from the first chip surface (8) forms a tip, and the axis of the shank (1) passes through the tip. The end chip surface (15) is triangular.

9. The drill reamer of claim 4, wherein, The outer circumferential surface of the shank (1) is higher than the third chip surface (14) to form a fourth chip surface (18) between the third chip surface (14) and the shank (1), the fourth chip surface (18) is inclined from the side close to the tool body (2) to the side close to the third chip surface (14), the top side of the fourth chip surface (18) is closer to the shank (1) than the bottom side, and the fourth chip surface (18) is a concave arc surface.

10. The drill reamer of claim 4, wherein, The first side of the first insert (4) in the width direction and the first side of the second insert (5) are provided with a chip groove (3), and the second side of the first insert (4) in the width direction and the second side of the second insert (5) are provided with a chip groove (3), the chip groove (3) gradually approaches the axis of the shank (1) from the outside.

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