Pointed-end bottom-cleaning reaming reamer

Abstract

The utility model relates to the technical field of mechanical manufacturing and machining, and discloses a pointed-end bottom-cleaning reaming reamer which comprises a reamer body, first cutting edges are symmetrically arranged on the outer wall of the reamer body, chip flutes are formed in the front angles of the first cutting edges, the included angle between each chip flute and the corresponding first cutting edge is 90 degrees, and the included angle between each chip flute and the corresponding first cutting edge is 90 degrees. One end of the first cutting edge is provided with a second cutting edge, one side of the second cutting edge is provided with a third cutting edge, and the bottom end of the third cutting edge is provided with a fourth cutting edge. Abrasion of cuttings to a cutting edge is reduced, the service life of the cutter is prolonged, the overall precision of a hole is improved, the tightness of parts is guaranteed, the problem that the back gouging effect is poor is solved, the product quality is improved, and the stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing and processing technology, and in particular to a pointed bottom clearing countersink. Background Technology

[0002] In mechanical manufacturing, various parts often require hole machining operations, including drilling, reaming, countersinking, and boring. Pointed-tip bottom-cleaning countersinking reamers are specifically designed for these two machining processes. In modern industrial production, the requirements for the precision and quality of mechanical parts are increasingly stringent. Many parts require hole machining and finishing during processing to meet assembly and functional requirements. Traditional drilling and boring methods often cannot fully meet the needs of complex hole shapes and high-precision machining. Currently, commercially available pointed-tip bottom-cleaning countersinking reamers consist of a shank, tool body, and tool tip. However, traditional pointed-tip bottom-cleaning countersinking reamers have limited chip removal space, making them prone to clogging during cutting. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a pointed bottom countersinking reamer, which aims to improve the problem of chips not being able to be discharged quickly.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pointed bottom clearing countersink, comprising a blade body, wherein a first cutting edge is symmetrically arranged on the outer wall of the blade body, and a chip groove is provided at the rake angle of the first cutting edge, wherein the chip groove and the first cutting edge form an angle of 90°.

[0005] Preferably, a second cutting edge is provided at one end of the first cutting edge, a third cutting edge is provided on one side of the second cutting edge, and a fourth cutting edge is provided on the side of the third cutting edge near the central axis of the tool body.

[0006] Preferably, the fourth cutting edge is located on one side of the chip groove, near the central axis of the tool body.

[0007] Preferably, the length of the blade is 90mm and the diameter of the blade is 9.2mm.

[0008] Preferably, the length of the chip groove is 40 mm, and the diameter between the chip grooves is 2.2 mm.

[0009] Preferably, the diameter of the third cutting edge is 7.5 mm and the angle of the third cutting edge is 84°.

[0010] Preferably, the diameter of the fourth cutting edge is 3mm.

[0011] This utility model has the following beneficial effects:

[0012] 1. In this utility model, the chip groove can achieve the effect of rapid chip discharge. It can not only remove chips, but also avoid blockage during cutting, reduce chip interference, improve hole accuracy, reduce surface roughness, solve the problem of chips not being able to be discharged quickly, reduce chip wear on the cutting edge, and extend the tool life.

[0013] 2. In this utility model, the first cutting edge and the second cutting edge can achieve the effect of root clearing. Not only can it clear the root, but it can also ensure accuracy, improve the overall accuracy of the hole, ensure the tightness of the parts, solve the problem of poor root clearing effect, improve product quality, and increase stability. Attached Figure Description

[0014] Figure 1 This is a partial structural cross-sectional view of a pointed bottom-cleaning countersinker proposed in this utility model;

[0015] Figure 2 This is a partial cross-sectional schematic diagram of the first cutting edge of a pointed bottom clearing countersink proposed in this utility model.

[0016] Legend:

[0017] 1. First cutting edge; 2. Second cutting edge; 3. Third cutting edge; 4. Fourth cutting edge. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-2 This utility model provides an embodiment of a pointed bottom countersink, comprising a blade body, with first cutting edges 1 symmetrically arranged on the outer wall of the blade body. A chip groove is provided at the rake angle of the first cutting edge 1, and the chip groove forms a 90° angle with the first cutting edge 1. A second cutting edge 2 is provided at one end of the first cutting edge 1, a third cutting edge 3 is provided on one side of the second cutting edge 2, and a fourth cutting edge 4 is provided on the side of the third cutting edge 3 near the central axis of the blade body. The side of the fourth cutting edge 4 near the central axis of the blade body is located on one side of the chip groove. The blade body is 90mm long and 9.2mm in diameter. The chip groove is 40mm long and 2.2mm in diameter. The third cutting edge 3 has a diameter of 7.5mm and an angle of 84°. The fourth cutting edge 4 has a diameter of 3mm.

[0020] Specifically, when used by the user, the tool body can be connected to a drive source for operation, connected to a machine tool for machining, or mounted on a handheld electric drill for countersinking. After drilling, burrs, debris, or uneven parts often remain at the bottom of the hole. These residues can be cleaned by using the first cutting edge 1 and the second cutting edge 2 to reach the bottom of the hole. The first cutting edge 1 can also be used for counterboring and reaming. Counterboring can enlarge the hole to create a countersink of a specific shape, while reaming can perform finishing work to improve the hole's appearance. Dimensional accuracy is ensured, while the fourth cutting edge 4 can be used for forming raised top surfaces. The first cutting edge 1 forms a 90° angle with the chip groove, which is a straight groove, facilitating chip removal and preventing chip blockage from affecting machining quality. When the first cutting edge 1 cuts, it generates a large number of chips, which can be removed through the chip groove. Similarly, chips generated by the second, third, and fourth cutting edges 2 and 3, and 4 during root clearing operations, can also be removed through the chip groove. The angle and length of the first cutting edge 1 can be customized according to the dimensions of the customer's machined parts. The chip groove enables rapid chip removal, not only removing chips but also preventing blockage during cutting, reducing chip interference, improving hole accuracy, reducing surface roughness, solving the problem of slow chip removal, reducing chip wear on the cutting edge, and extending tool life. The first and second cutting edges 1 and 2 achieve root clearing, ensuring accuracy and improving overall hole accuracy, guaranteeing part tightness, solving the problem of poor root clearing effect, improving product quality, and increasing stability.

[0021] Working principle: After drilling, burrs, debris, or uneven parts often remain at the bottom of the hole. These residues can be removed by using the first cutting edge 1 and the second cutting edge 2 to reach the bottom of the hole. The first cutting edge 1 can also be used for counterboring and reaming. Counterboring can be used to enlarge the hole and create a countersunk hole of a specific shape. Reaming can be used to finish the hole and improve its dimensional accuracy. The fourth cutting edge 4 can be used to shape the raised top surface. The first cutting edge 1 forms a 90° angle with the chip flute, which is a straight groove, which facilitates chip removal and prevents chip blockage from affecting the machining quality. When the first cutting edge 1 cuts, it will generate a large number of chips, which can be removed through the chip flute. When the second cutting edge 2, the third cutting edge 3, and the fourth cutting edge 4 perform root cleaning operations, the chips generated can also be removed through the chip flute. The angle and length of the first cutting edge 1 can be customized according to the size of the parts being machined by the customer.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pointed bottom-cleaning countersink, comprising a blade body, characterized in that: The outer wall of the blade body is symmetrically provided with a first cutting edge (1), and a chip groove is provided at the front corner of the first cutting edge (1). The chip groove and the first cutting edge (1) form an angle of 90°. The first cutting edge (1) is provided with a second cutting edge (2) at one end, and a third cutting edge (3) is provided on one side of the second cutting edge (2), and a fourth cutting edge (4) is provided on the side of the third cutting edge (3) near the central axis of the tool body. The fourth cutting edge (4) is located on one side of the chip groove near the central axis of the tool body.

2. The pointed bottom countersinking reamer according to claim 1, characterized in that: The length of the blade is 90mm and the diameter of the blade is 9.2mm.

3. The pointed bottom countersinking reamer according to claim 1, characterized in that: The length of the chip groove is 40 mm, and the diameter between the chip grooves is 2.2 mm.

4. A pointed bottom-cleaning countersink as described in claim 1, characterized in that: The diameter of the third cutting edge (3) is 7.5 mm, and the angle of the third cutting edge (3) is 84°.

5. A pointed bottom-cleaning countersink as described in claim 1, characterized in that: The diameter of the fourth cutting edge (4) is 3 mm.

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