Steel plate drill

Abstract

The utility model discloses a steel plate drill and belongs to the field of hole machining tools. The handle part is connected to one end of the cutter body; the first blades and the second blades are connected to the other end of the cutter body; the plurality of chip grooves are formed in the cutter body and are correspondingly communicated with the plurality of first blades and the plurality of second blades; wherein an inner hole is defined by the inner sides of the first blades, an outer hole is defined by the outer sides of the second blades, a first radial distance is formed between the first blades and the outer hole, a second radial distance is formed between the second blades and the inner hole, and the first blades are provided with first inclined faces inclined towards the direction of the inner hole. And the second blade is provided with a second inclined surface inclined towards the direction of the outer hole. The utility model has the technical effect that the size of scraps can be conveniently reduced.

Description

Technical Field

[0001] The utility model relates to a hole processing tool, in particular to a steel plate drill. Background Art

[0002] A steel plate drill is a tool for drilling holes in steel members, also known as a hollow drill or a core drill, and is widely used in the field of hole processing.

[0003] The waste chips generated by related steel plate drills are relatively large in size, which easily leads to poor chip removal performance, and thus poor processing performance of related steel plate drills. Summary of the Utility Model

[0004] Purpose of the Utility Model: The purpose of the utility model is to provide a steel plate drill, which is convenient for reducing the size of waste chips.

[0005] Technical Solution: A steel plate drill includes:

[0006] A tool body;

[0007] A shank portion connected to one end of the tool body;

[0008] A plurality of first cutting blades and a plurality of second cutting blades both connected to the other end of the tool body;

[0009] A plurality of chip removal grooves provided on the tool body, and the plurality of chip removal grooves communicate with the plurality of first cutting blades and the plurality of second cutting blades correspondingly;

[0010] Wherein, an inner hole is formed by enclosing the inner sides of the plurality of first cutting blades, an outer hole is formed by enclosing the outer sides of the plurality of second cutting blades, a first radial distance is provided between the first cutting blade and the outer hole, a second radial distance is provided between the second cutting blade and the inner hole, a first inclined surface inclined towards the inner hole is provided on the first cutting blade, and a second inclined surface inclined towards the outer hole is provided on the second cutting blade.

[0011] Optionally, the number of the plurality of first cutting blades is equal to the number of the plurality of second cutting blades.

[0012] Optionally, the plurality of first cutting blades and the plurality of second cutting blades are arranged alternately.

[0013] Optionally, the first radial distance is greater than 0 mm and less than or equal to 2 mm; the second radial distance is greater than 0 mm and less than or equal to 2 mm.

[0014] Optionally, the first radial distance is equal to the second radial distance.

[0015] Optionally, the first inclination angle of the first inclined surface is greater than 0° and less than or equal to 45°; the second inclination angle of the second inclined surface is greater than 0° and less than or equal to 45°.

[0016] Optionally, the first inclination angle of the first inclined surface is equal to the second inclination angle of the second inclined surface.

[0017] Optionally, the connection mode between the handle and one end of the tool body is integrally formed connection, and the plurality of first blades and the plurality of second blades are both welded to the other end of the tool body.

[0018] Beneficial effects: During operation, the workpiece generates a radial extrusion force towards the outer hole direction on the first inclined surface, that is, a radial extrusion force towards the outer hole direction on the first blade, so that the tool body is subjected to a radial extrusion force towards the outer hole direction, and then the first radial distance is reduced. At the same time, the workpiece generates a radial extrusion force towards the inner hole direction on the second inclined surface, that is, a radial extrusion force towards the inner hole direction on the second blade, so that the tool body is subjected to a radial extrusion force towards the inner hole direction, and then the second radial distance is reduced. When the deformation resistance of the tool body is greater than the radial extrusion force, the tool body undergoes a springback deformation, so that the first radial distance and the second radial distance change alternately and reciprocally, and then the steel plate drill of the present application forms micro-vibration, which has a chip-breaking effect on the waste chips, facilitating the reduction of the size of the waste chips, ensuring good chip removal performance and good machining performance. Description of the Drawings

[0019] Figure 1 is one of the schematic structural diagrams of a steel plate drill of the present utility model;

[0020] Figure 2 is the second schematic structural diagram of a steel plate drill of the present utility model;

[0021] Figure 3 is Figure 2 a partial view of A in

[0022] Figure 4 is Figure 2 a sectional view taken along C-C in

[0023] Figure 5 is Figure 2 a partial view of B in

[0024] Figure 6 is Figure 2 a sectional view taken along D-D in

[0025] In the figure: 1, tool body; 2, handle; 31, first blade; 311, first inclined surface; 32, second blade; 321, second inclined surface; 4, chip removal groove; 5, inner hole; 6, outer hole. Detailed Embodiments

[0026] To make the technical solution of the present utility model clearer, the following further elaborates on the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0027] Embodiment 1

[0028] Combined with Figure 1-6 , this embodiment provides a steel plate drill, including: a tool body 1; a shank 2 connected to one end of the tool body 1; a plurality of first blades 31 and a plurality of second blades 32 both connected to the other end of the tool body 1; a plurality of chip flutes 4 provided on the tool body 1, and the plurality of chip flutes 4 communicate with the plurality of first blades 31 and the plurality of second blades 32 correspondingly; wherein, an inner hole 5 is formed by enclosing the inner sides of the plurality of first blades 31, an outer hole 6 is formed by enclosing the outer sides of the plurality of second blades 32, a first radial distance a exists between the first blade 31 and the outer hole 6, a second radial distance b exists between the second blade 32 and the inner hole 5, a first inclined surface 311 inclined towards the inner hole 5 is provided on the first blade 31, and a second inclined surface 321 inclined towards the outer hole 6 is provided on the second blade 32.

[0029] Specifically, during operation, the workpiece generates a radial extrusion force towards the outer hole 6 on the first inclined surface 311, that is, a radial extrusion force towards the outer hole 6 on the first blade 31, thereby causing the tool body 1 to receive a radial extrusion force towards the outer hole 6, and further causing the first radial distance a to decrease. At the same time, the workpiece generates a radial extrusion force towards the inner hole 5 on the second inclined surface 321, that is, a radial extrusion force towards the inner hole 5 on the second blade 32, thereby causing the tool body 1 to receive a radial extrusion force towards the inner hole 5, and further causing the second radial distance b to decrease. When the deformation resistance of the tool body 1 is greater than the radial extrusion force, the tool body 1 undergoes a springback deformation, thereby causing the first radial distance a and the second radial distance b to change alternately and reciprocally, and further causing the steel plate drill of the present application to form micro-vibration, which has a chip breaking effect on the waste chips, facilitating the reduction of the size of the waste chips, ensuring good chip evacuation performance, and ensuring good machining performance;

[0030] Among them, the tool body 1 is used to carry the shank 2, a plurality of first blades 31, a plurality of second blades 32, etc.; the shank 2 is used to cooperate with related drilling equipment; a plurality of first blades 31 and a plurality of second blades 32 are both used for cutting. The number of a plurality of first blades 31 and a plurality of second blades 32 is not limited, and they can be equal or unequal, preferably equal. The positional relationship of a plurality of first blades 31 and a plurality of second blades 32 is not limited, and they can be evenly distributed or unevenly distributed, preferably evenly distributed; a plurality of chip flutes 4 are used to correspondingly discharge the waste chips generated by a plurality of first blades 31 and a plurality of second blades 32.

[0031] Furthermore, as Figure 2 , the number of a plurality of first blades 31 and a plurality of second blades 32 is equal, and the equality of the radial extrusion forces in different directions received by the tool body 1 is better when the numbers are equal.

[0032] Further, a plurality of first blades 31 and a plurality of second blades 32 are arranged in an interleaved manner, and the interleaved arrangement facilitates good symmetry of the radial extrusion forces in different directions applied to the tool body 1.

[0033] Further, as Figure 3 and 5 , the first radial distance a is greater than 0 mm and less than or equal to 2 mm; the second radial distance b is greater than 0 mm and less than or equal to 2 mm. The first radial distance a can specifically be 0.5 mm, 1 mm, 2 mm, etc.; the second radial distance b can specifically be 0.5 mm, 1 mm, 2 mm, etc.

[0034] Further, as Figure 3 and 5 , the first radial distance a is equal to the second radial distance b, which facilitates good symmetry of the radial distribution of a plurality of first blades 31 and a plurality of second blades 32.

[0035] Further, as Figure 4 and 6 , the first inclination angle θ1 of the first inclined surface 311 is greater than 0° and less than or equal to 45°; the second inclination angle θ2 of the second inclined surface 321 is greater than 0° and less than or equal to 45°; the first inclination angle θ1 of the first inclined surface 311 can specifically be 10°, 30°, 45°, etc.; the second inclination angle θ2 of the second inclined surface 321 can specifically be 10°, 30°, 45°, etc.

[0036] Further, as Figure 4 and 6 , the first inclination angle θ1 of the first inclined surface 311 is equal to the second inclination angle θ2 of the second inclined surface 321, which facilitates good symmetry of the radial extrusion forces in different directions applied to the tool body 1.

[0037] Further, as Figure 1 and 2 , the connection mode between the handle portion 2 and one end of the tool body 1 is integrally formed connection, and a plurality of first blades 31 and a plurality of second blades 32 are both welded to the other end of the tool body 1. The integrally formed connection facilitates good integrity of one end of the handle portion 2 and the tool body 1; the welding facilitates good connection firmness of a plurality of first blades 31 and a plurality of second blades 32 to the other end of the tool body 1.

[0038] The above embodiments only represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A steel plate drill, characterized in that, Comprising: A tool body; A handle portion connected to one end of the tool body; A plurality of first blades and a plurality of second blades both connected to the other end of the tool body; A plurality of chip removal grooves provided in the tool body, the plurality of chip removal grooves corresponding to and communicating with the plurality of first blades and the plurality of second blades; Wherein, an inner hole is formed by enclosing the inner sides of the plurality of first blades, an outer hole is formed by enclosing the outer sides of the plurality of second blades, a first radial distance exists between the first blade and the outer hole, a second radial distance exists between the second blade and the inner hole, a first inclined surface inclined towards the inner hole is provided on the first blade, and a second inclined surface inclined towards the outer hole is provided on the second blade.

2. The steel plate drill according to claim 1, characterized in that, The number of the plurality of first blades is equal to the number of the plurality of second blades.

3. A steel plate drill according to claim 2, characterized in that, The plurality of first blades and the plurality of second blades are arranged alternately.

4. A steel plate drill according to any one of claims 1 to 3, characterized in that, The first radial distance is greater than 0 mm and less than or equal to 2 mm; the second radial distance is greater than 0 mm and less than or equal to 2 mm.

5. A steel plate drill according to claim 4, characterized in that, The first radial distance is equal to the second radial distance.

6. A steel plate drill according to any one of claims 1-3, characterized in that, The first inclination angle of the first inclined surface is greater than 0° and less than or equal to 45°; the second inclination angle of the second inclined surface is greater than 0° and less than or equal to 45°.

7. A steel plate drill according to claim 6, characterized in that, The first inclination angle of the first inclined surface is equal to the second inclination angle of the second inclined surface.

8. A steel plate drill according to any one of claims 1-3, characterized in that, The connection mode between the handle portion and one end of the tool body is integral molding connection, and the plurality of first blades and the plurality of second blades are both welded to the other end of the tool body.

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