Drilling and chamfering integrated U drill

Abstract

The utility model belongs to the technical field of machining tools, and particularly relates to a drilling and chamfering integrated U drill which comprises a tool handle, a connecting part and a drill rod, two chip removal straight grooves are oppositely formed in the drill rod, and an inner blade and an outer blade are arranged in the two chip removal straight grooves in the top of the drill rod respectively. An upper chamfering blade and a lower chamfering blade are distributed on the drill rod in the axial direction of the drill rod in an up-down spaced mode and arranged on the chip removal straight groove. The U-shaped drill is simple in structure, reasonable in design and low in cost, and on the basis of an existing U-shaped drill structure, the upper chamfering blade and the lower chamfering blade are additionally arranged, so that the functional purposes of the U-shaped drill are increased, the U-shaped drill can conduct angle milling machining, combined machining of a single tool is achieved, and machining efficiency and production economic benefits are effectively improved.

Description

Technical field:

[0001] The utility model belongs to the technical field of mechanical processing tools, in particular to an integrated U-drill for drilling and chamfering. Background technology:

[0002] U-drills, also known as high-speed drills, are internally cooled drills that offer excellent chip removal, high efficiency, and continuous drilling capabilities. They are commonly used for traditional hole-making processes such as drilling and reaming. However, existing U-drills are limited to drilling, limiting their application. In actual workpiece production, multiple tools with different functions often need to be replaced to complete the workpiece, resulting in low efficiency and a time-consuming and labor-intensive process. Summary of the invention:

[0003] The purpose of the utility model is to provide an integrated U-drill for drilling and chamfering, which, on the basis of the existing U-drill structure, adds an upper chamfering blade and a lower chamfering blade to enable it to perform milling processing, realize compound processing with a single tool, and effectively improve processing efficiency and production economic benefits.

[0004] The utility model is achieved in this way:

[0005] A U-drill with integrated drilling and chamfering, comprising a shank, a connecting part and a drill rod, wherein two chip removal straight grooves are provided opposite to each other on the drill rod, and an inner blade and an outer blade are respectively provided in the two chip removal straight grooves located at the top of the drill rod, and an upper chamfering blade and a lower chamfering blade are distributed at intervals in the upper and lower directions along the axial direction of the drill rod, and the upper chamfering blade and the lower chamfering blade are arranged on the chip removal straight groove.

[0006] In the above-mentioned integrated drilling and chamfering U drill, the upper chamfering blade and the lower chamfering blade are both arranged on the same chip removal straight groove.

[0007] In the above-mentioned integrated drilling and chamfering U drill, the inner blade or the outer blade or the upper chamfering blade or the lower chamfering blade is a triangular or quadrilateral blade.

[0008] In the above-mentioned integrated drilling and chamfering U drill, the angle between the cutting edge of the upper chamfering blade and the axis of the drill rod is 135°±0.5°.

[0009] In the above-mentioned integrated drilling and chamfering U drill, the angle between the cutting edge of the lower chamfering blade and the axis of the drill rod is 45°±0.5°.

[0010] In the above-mentioned integrated U-drill for drilling and chamfering, water outlet holes are provided on the top surfaces of the drill rod on the back sides of the inner blade and the outer blade, and a water inlet hole is provided along the axis of the end face of the shank. The water inlet hole extends inward through the connecting part to the top of the drill rod and is connected to the water outlet holes arranged inwardly at the two inner ends.

[0011] The outstanding advantages of the utility model compared with the prior art are:

[0012] The utility model has a simple structure, reasonable design and low cost. On the basis of the existing U drill structure, an upper chamfering blade and a lower chamfering blade are added to increase the functional use of the U drill, so that it can perform angle milling processing, realize compound processing with a single tool, and effectively improve processing efficiency and production economic benefits. Description of the drawings:

[0013] Figure 1 It is an overall three-dimensional diagram of the utility model;

[0014] Figure 2 It is the overall front view of the utility model.

[0015] In the figure: 1. Tool handle; 2. Connecting part; 3. Drill rod; 4. Chip removal groove; 5. Inner blade; 6. Outer blade; 7. Upper chamfered blade; 8. Lower chamfered blade; 9. Water outlet; 10. Water inlet; β, angle between the cutting edge of the upper chamfered blade and the axis of the drill rod; α, angle between the cutting edge of the lower chamfered blade and the axis of the drill rod. Specific implementation method:

[0016] The present invention is further described below with reference to specific embodiments. Figure 1 —2:

[0017] A U-drill for drilling and chamfering, comprising a shank 1, a connecting portion 2 and a drill rod 3. Two chip removal straight grooves 4 are provided on the drill rod 3. An inner blade 5 and an outer blade 6 are provided in the two chip removal straight grooves 4 at the top of the drill rod 3 respectively. An upper chamfering blade 7 and a lower chamfering blade 8 are distributed at intervals in the upper and lower directions along the axial direction of the drill rod 3. The upper chamfering blade 7 and the lower chamfering blade 8 are provided on the chip removal straight groove 4.

[0018] The utility model has a simple structure, reasonable design and low cost. On the basis of the existing U-drill structure, an upper chamfering blade 7 and a lower chamfering blade 8 are added to increase the functional use of the U-drill, so that it can perform angle milling processing, realize compound processing with a single tool, and effectively improve processing efficiency and production economic benefits.

[0019] Furthermore, in this embodiment, the upper chamfering blade 7 and the lower chamfering blade 8 are both arranged on the same chip removal straight groove 4. Of course, according to actual processing requirements, the upper chamfering blade 7 and the lower chamfering blade 8 can be respectively arranged on two chip removal straight grooves 4.

[0020] Simultaneously, described inner blade 5, outer blade 6, upper chamfering blade 7, lower chamfering blade 8 can be selected triangle or quadrangular blade.And in the present embodiment, inner blade 5, outer blade 6, upper chamfering blade 7, lower chamfering blade 8 are triangular blades.

[0021] Furthermore, in order to enable the upper chamfering blade 7 and the lower chamfering blade 8 to meet the milling angle processing requirements of most workpiece chamfers, the angle β between the cutting edge of the upper chamfering blade and the axis of the drill rod is 135°±0.5°; and the angle α between the cutting edge of the lower chamfering blade and the axis of the drill rod is 45°±0.5°.

[0022] In addition, in order to enable the U drill to move forward stably and have a higher processing quality during drilling, water outlet holes 9 are provided on the top surface of the drill rod 3 on the back side of the inner blade 5 and the outer blade 6, and a water inlet hole 10 is provided on the end surface of the shank 1 along its axis. The water inlet hole 10 extends inwardly through the connecting part 2 to the top of the drill rod 3 and is connected to the water outlet holes 9 arranged inwardly at the two inner ends.

[0023] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A U-drill for drilling and chamfering, comprising a shank (1), a connecting portion (2) and a drill rod (3), wherein two chip removal straight grooves (4) are provided on the drill rod (3) opposite to each other, and an inner blade (5) and an outer blade (6) are provided in the two chip removal straight grooves (4) at the top of the drill rod (3), respectively, and characterized in that: The drill rod (3) is provided with an upper chamfering blade (7) and a lower chamfering blade (8) spaced apart in the upper and lower directions along its axial direction. The upper chamfering blade (7) and the lower chamfering blade (8) are arranged on the chip removal straight groove (4).

2. The integrated drilling and chamfering U drill according to claim 1, characterized in that: The upper chamfering blade (7) and the lower chamfering blade (8) are both arranged on the same chip removal straight groove (4).

3. The integrated drilling and chamfering U drill according to claim 1 or 2, characterized in that: The inner blade (5) or the outer blade (6) or the upper chamfered blade (7) or the lower chamfered blade (8) is a triangular or quadrilateral blade.

4. The integrated drilling and chamfering U drill according to claim 1 or 2, characterized in that: The angle (β) between the cutting edge of the upper chamfered blade and the axis of the drill rod is 135°±0.5°.

5. The integrated drilling and chamfering U drill according to claim 1 or 2, characterized in that: The angle (α) between the cutting edge of the lower chamfered blade and the axis of the drill rod is 45°±0.5°.

6. The integrated drilling and chamfering U drill according to claim 1, characterized in that: Water outlet holes (9) are provided on the top surface of the drill rod (3) on the back side of the inner blade (5) and the outer blade (6), and a water inlet hole (10) is provided on the end surface of the handle (1) along its axis. The water inlet hole (10) extends inwardly through the connecting portion (2) to the top of the drill rod (3) and is connected to the water outlet holes (9) arranged inwardly at the two inner ends.

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