Deep hole stepped drill with hexagonal handle

Abstract

The utility model discloses a deep hole stepped drill with a hexagonal handle. The deep hole stepped drill comprises a drill bit, a drill body and a hexagonal handle part, the drill body is composed of a plurality of step portions, the diameters of the step portions are sequentially decreased in the axis direction of the top end of the drill bit, the front end of the drill body is connected with the tail end of the drill bit, a step table and tapered step slopes are arranged on the surface of the drill bit, and the step slopes are arranged at the two ends of the step table. The diameter of the step tables is sequentially decreased from the axis of the top end of the drill bit to the front end of the drill bit, the front end of the drill bit is provided with a vertex angle with taper, the drill body is provided with a chip groove, the chip groove is spirally arranged, the front end of the chip groove extends to the vertex angle, and the rear end of the drill body is connected with the hexagonal handle part. Abrasion to the drill bit can be reduced, the step drill is prevented from being scrapped due to damage of the drill bit, and the service life of the step drill is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool technical field, especially a hexagonal handle deep hole stepped drill. BACKGROUND

[0002] The stepped drill is a multi-diameter integrated forming tool, a plurality of steps are designed on the tool body, and different size holes can be machined at one time. It effectively replaces the cumbersome process of replacing drill bit multiple times in traditional machining, and significantly improves production efficiency. At the same time, it can perfectly guarantee the coaxiality between the holes of each step, and is widely used in the efficient machining of thin plates and parts such as screw countersunk hole and tube plate hole. In the prior art, the drill bit is worn greatly during the drilling process of the deep hole, which causes the stepped drill to be scrapped frequently due to drill bit damage, affecting the service life of the stepped drill. SUMMARY

[0003] According to the utility model embodiment, in order to solve the problem that the drill bit is worn greatly during the drilling process of the stepped drill, a hexagonal handle deep hole stepped drill is provided, which comprises: a drill bit, a drill body and a hexagonal handle part.

[0004] The drill body is composed of a plurality of stepped parts, the diameters of the stepped parts decrease in turn along the drill bit top end axis direction, the front end of the drill body is connected with the tail end of the drill bit, the surface of the drill bit is provided with stepped platforms and stepped inclined surfaces with taper, both ends of the stepped platform are provided with stepped inclined surfaces, the diameters of the stepped platforms decrease in turn along the drill bit top end axis to the front end direction, the front end of the drill bit is provided with a top corner with taper, a chip removal groove is formed on the drill body, the chip removal groove is spirally arranged, the front end of the chip removal groove extends to the top corner, and the rear end of the drill body is connected with the hexagonal handle part.

[0005] Further, the angle of the top corner is 90°-150°.

[0006] Further, two chip removal grooves are formed on the drill body, the two chip removal grooves divide the drill body into a first drill body segment and a second drill body segment, and the first drill body segment and the second drill body segment are both helical.

[0007] Further, the width of the stepped platform increases in turn along the drill bit top end axis to the front end direction.

[0008] Further, the length of the inclined surface of the front half part of the stepped inclined surface near the top corner gradually increases, the length of the inclined surface of the rear half part of the stepped inclined surface near the drill body gradually decreases, and the lengths of the stepped inclined surfaces are mixed and combined.

[0009] Further, the inclination angle of the stepped inclined surface is 30°-75°.

[0010] According to the hexagonal shank deep hole stepped drill, the hexagonal shank part drives the drill body to rotate, the vertex angle is aligned with the position to be punched, the drill bit punches the material, the stepped platform and the stepped inclined surface are arranged on the surface of the drill bit, the structural strength of the drill bit is increased, the wear of the drill bit is reduced when the drill bit drills, the stepped drill is prevented from being scrapped due to damage of the drill bit, and the service life of the stepped drill is prolonged.

[0011] It is to be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further explanation of the subject technology claimed. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure view of the hexagonal shank deep hole stepped drill according to the embodiment of the utility model;

[0013] Figure 2 It is a side view of the hexagonal shank deep hole stepped drill according to the embodiment of the utility model;

[0014] Figure 3 It is a drill bit sectional view of the hexagonal shank deep hole stepped drill according to the embodiment of the utility model;

[0015] Figure 4 It is Figure 1 The enlarged view at A in the figure;

[0016] Figure 5 It is Figure 1 The enlarged view at B in the figure;

[0017] Figure 6 It is Figure 1 The enlarged view at C in the figure;

[0018] Figure 7 It is a stepped part contrast view of the hexagonal shank deep hole stepped drill according to the embodiment of the utility model;

[0019] Figure 8 It is a stepped part sectional view of the hexagonal shank deep hole stepped drill according to the embodiment of the utility model;

[0020] Figure 9 It is Figure 1 The enlarged view at D in the figure.

[0021] In the figure, the reference sign 1 is a drill bit, 11 is a vertex angle, 12 is a stepped platform, 13 is a stepped inclined surface, 2 is a drill body, 21 is a stepped part, 22 is a first transition part, 23 is a second transition part, 3 is a hexagonal shank part, 4 is a chip flute, 41 is a first drill body section, and 42 is a second drill body section. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0023] First, combine Figures 1-9 This invention describes a hexagonal shank deep hole step drill according to an embodiment of the present invention, used to process holes of different sizes in one operation.

[0024] like Figures 1-9 As shown, an embodiment of the present invention provides a hexagonal shank deep hole step drill, comprising: a drill bit 1, a drill body 2, and a hexagonal shank 3;

[0025] The drill body 2 is composed of multiple stepped sections 21, the diameter of which decreases sequentially along the axis of the top of the drill bit 1. The front end of the drill body 2 is connected to the tail end of the drill bit 1. The surface of the drill bit 1 is provided with a stepped platform and a stepped inclined surface with a taper. Both ends of the stepped platform are provided with stepped inclined surfaces. The diameter of the stepped platform decreases sequentially along the axis of the top of the drill bit 1 towards the front end. The front end of the drill bit 1 is provided with a tapered apex angle 11. The drill body 2 is provided with a chip removal groove 4, which is spirally arranged. The front end of the chip removal groove 4 extends to the apex angle 11. The rear end of the drill body 2 is connected to the hexagonal shank 3.

[0026] This application drives the drill body 2 to rotate via the hexagonal shank 3, aligning the apex 11 with the position to be drilled, and the drill bit 1 drills the material. By setting a stepped platform and stepped inclined surface on the surface of the drill bit 1, the structural strength of the drill bit 1 can be increased, reducing the wear on the drill bit 1 during drilling, preventing the stepped drill from being scrapped due to damage to the drill bit 1, and improving the service life of the stepped drill.

[0027] like Figures 1-3 As shown, the angle of the apex 11 is 90°~150°.

[0028] By setting the included angle of the apex angle 11, the drilling capability of the hammer head is improved, and the drilling speed is increased.

[0029] like Figures 1-7 As shown, the drill body 2 has two chip removal grooves 4, which divide the drill body 2 into a first drill body section 41 and a second drill body section 42. Both the first drill body section 41 and the second drill body section 42 are spiral-shaped.

[0030] The width of the stepped platform increases sequentially along the axis of the top of drill bit 1 towards the front end.

[0031] like Figure 9 As shown, the length of the stepped slope in the front half near the top corner 11 gradually increases, while the length of the stepped slope in the rear half near the drill body 2 gradually decreases, and the lengths of the stepped slopes are mixed and combined. Figure 9In the equation, h is the basic slope length of the stepped slope. h+1 and h-1 are used to indicate the direction of increase and decrease. The 1 does not refer to 1mm or 1cm, but to a specific length.

[0032] The inclination angle of the stepped ramp is 30°~75°.

[0033] The front ends of the first drill body section 41 and the second drill body section 42 are each provided with a first transition part 22 and a second transition part 23;

[0034] The first transition section 22 is connected to the second transition section 23 on one side and to the first drill body section 41 or the second drill body section 42 on the other side. The surfaces of the first transition section 22 and the second transition section 23 are both inclined.

[0035] In the first drill body section 41, the inclination angle of the first transition section 22 is 30°, and the inclination angle of the second transition section 23 is 45°.

[0036] In the second drill body section 42, the inclination angle of the first transition section 22 is 25°, and the inclination angle of the second transition section 23 is 45°.

[0037] The radii of two adjacent stepped portions 21 differ by 1 mm;

[0038] In the first drill body section 41, the radius difference between the two ends of the second transition section 23 is 0.32 mm;

[0039] In the second drill body section 42, the radius difference between the two ends of the second transition section 23 is 0.56 mm.

[0040] The radius of the stepped portion 21 in the first drill body section 41 is 0.03mm~0.04mm longer than the radius of the stepped portion 21 in the second drill body section 42.

[0041] like Figure 8 As shown, the counterclockwise sidewall of the chip removal groove 4 is inclined, and the angle between the sidewall and the vertical plane is 12°~16°.

[0042] Above, refer to Figures 1-9 This invention describes a hexagonal shank deep hole stepped drill according to an embodiment of the present invention. The drill body 2 is driven to rotate by the hexagonal shank 3, and the apex 11 is aligned with the position to be drilled. The drill bit 1 drills the material. By setting a stepped platform and stepped inclined surface on the surface of the drill bit 1, the structural strength of the drill bit 1 can be increased, the wear of the drill bit 1 during drilling can be reduced, the stepped drill can be prevented from being scrapped due to damage to the drill bit 1, and the service life of the stepped drill can be improved.

[0043] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A hexagonal shank deep hole step drill, characterized in that, include: Drill bit, drill body and hexagonal shank; The drill body is composed of multiple stepped sections, the diameter of which decreases sequentially along the axis of the drill bit tip. The front end of the drill body is connected to the tail end of the drill bit. The surface of the drill bit is provided with a stepped platform and a tapered stepped inclined surface. Both ends of the stepped platform are provided with stepped inclined surfaces. The diameter of the stepped platform decreases sequentially along the axis of the drill bit tip towards the front end. The front end of the drill bit is provided with a tapered apex. The drill body is provided with a chip removal groove, which is spirally arranged and extends to the apex. The rear end of the drill body is connected to a hexagonal shank.

2. The hexagonal shank deep hole step drill as described in claim 1, characterized in that, The angle of the apex is 90°~150°.

3. The hexagonal shank deep hole step drill as described in claim 1, characterized in that, The drill body has two chip removal grooves, which divide the drill body into a first drill body segment and a second drill body segment. Both the first drill body segment and the second drill body segment are spiral-shaped.

4. The hexagonal shank deep hole step drill as described in claim 1, characterized in that, The width of the stepped platform increases sequentially along the axis of the drill bit tip towards the front end.

5. The hexagonal shank deep hole step drill as described in claim 1, characterized in that, The length of the stepped slope in the first half near the apex gradually increases, while the length of the stepped slope in the second half near the drill body gradually decreases, and the lengths of the stepped slopes are mixed and combined.

6. The hexagonal shank deep hole step drill as described in claim 5, characterized in that, The inclination angle of the stepped slope is 30°~75°.

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