Deep hole drill
By setting a thickened surface and an oil passage at the end of the deep hole drill bit, the problem of insufficient coolant flow was solved, achieving efficient cooling of the outer cutting edge, extending the service life of the cutting edge, and improving the machining quality.
Patent Information
- Application Number
- CN202520148404.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Insufficient coolant flow during cutting in conventional deep hole drills leads to rapid wear of the cutting edge, affecting service life and machining results.
By adding a thickened surface at the drill bit end to reduce the cooling flow at the chip removal hole, and increasing the oil passage to guide the coolant to the periphery of the outer cutting tool, the cooling effect is improved and the cutting temperature is reduced.
It improves the flow of coolant around the outer cutting edge, reduces the wear rate of the cutting edge, extends service life, and enhances machining results.
Smart Images
Figure CN223748620U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a drill bit technical field, especially a deep hole drill. BACKGROUND
[0002] The conventional deep hole drill is mostly through the outside of the two chip removal holes to enter the cooling liquid when cutting, so most of the cooling oil directly flows into the chip removal hole, and the cooling flow at the blade edge is small, and the cooling effect is relatively poor, especially the cutting speed of the outer blade is high, and the heat is large, but the blade edge is abraded fast due to the small cooling liquid flow, and the service life and machining effect are affected, and the present application is proposed in view of the above defects. SUMMARY
[0003] The utility model discloses a deep hole drill can increase the flow of cooling oil into the blade area, solve the problem of blade edge abrasion caused by small cooling liquid flow.
[0004] To solve the above problems, the utility model provides a deep hole drill, including the tool body, the chip removal hole, the thickening surface and the outer blade, the tool body has the drill bit end, the thickening surface sets up on the outer circle of drill bit end and is located the outside of chip removal hole, the thickening surface is used to reduce the gap between the outer circle of chip removal hole and the outer circle of drill bit end, has reduced the cooling flow of this place, relatively, the cooling flow that reduces all adds in the clearance of other areas and improves the cooling pressure of other areas, the outer circle of drill bit end is provided with oil passage no.
[0005] According to an embodiment of the utility model, the deep hole drill further includes an inner blade located on the inner side of the outer blade.
[0006] According to an embodiment of the utility model, the drill bit end is further provided with an oil passage no.
[0007] Preferably, the oil passage no.
[0008] Preferably, the axial flow channel no.
[0009] Preferably, the oil passage no.
[0010] According to the embodiment of the utility model, the axial flow channel two and the groove two all have edge through structure, namely, the inclined surface is arranged at the edge position of the axial flow channel two and the groove two, so that the cooling liquid can overflow from the edge of the axial flow channel two and the groove two to the surrounding, for guiding the cooling liquid to the periphery of the outer blade, and increasing the cooling flow.
[0011] According to the embodiment of the utility model, the thickened surface is arranged around the edge of the chip flute on the outer circle of the drill bit end, and can be integrally arranged or intermittently arranged.
[0012] The utility model discloses the beneficial effect is, through setting thickened surface, reduce the gap between the outer circle of chip flute and the outer circle of drill bit end, and then reduce the cooling flow that directly flows from the chip flute, the cooling flow that reduces here adds the clearance of other areas, thereby improving the cooling pressure of other areas, improves the overall cooling effect, and through setting oil passage one and oil passage two, the flowability of the cooling oil of the periphery of the outer blade is increased, the effect of reducing cutting temperature is played, the blade wear rate is reduced, the service life is improved, and the machining effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model is further illustrated below in connection with the drawings and examples.
[0014] Figure 1 It is the front view of deep hole drill;
[0015] Figure 2 It is the structural schematic view of thickened surface place;
[0016] Figure 3 It is the structural schematic view of oil passage two;
[0017] Figure 4 It is the structural schematic view of the drill bit end face of deep hole drill;
[0018] Figure 5 It is the structural schematic view of traditional drill bit;
[0019] Figure 6 It is the structural schematic view of the end face of traditional drill bit. DETAILED DESCRIPTION
[0020] The following description is only used to disclose the utility model to enable the person skilled in the art to implement the utility model. The examples in the following description are only as examples, and other obvious modifications can be thought of by the person skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, modification schemes, improvement schemes, equivalent schemes and other schemes not deviating from the spirit and scope of the utility model.
[0021] A deep hole drill, such as Figure 1The tool body 3, the chip flute 11, the thickened surface 8, the inner insert 2 and the outer insert 13.
[0022] As shown in Figure 2 , the tool body 3 has a drill end 31, the inner insert 2 and the outer insert 13 are both mounted at the position of the drill end 31, the thickened surface 8 is arranged on the outer circle of the drill end 31 and is located outside the chip flute 11, and is arranged around the edge of the chip flute 11, and the thickened surface 8 is used to reduce the gap between the outer circle of the chip flute 11 and the outer circle of the drill end 31.
[0023] As shown in Figure 4 , after the thickened surface 8 is added, the gap between the outer circle of the chip flute 11 and the outer circle of the drill end 31 is K, and by adjusting the thickness of the thickened surface 8, the gap K can be adjusted, as shown in Figure 6 , there is no thickened surface 8 on the traditional tool, and the gap between the outer circle of the chip flute 11 and the outer circle of the tool base 9 is K1, and in the case that K is half of K1, the cooling flow at this position is reduced, and relatively, the reduced cooling flow is added to the gap of other areas to increase the cooling pressure of other areas, and through fluid simulation, the cooling pressure of other areas is increased by more than one time.
[0024] The outer circle of the drill end 31 is provided with an oil passage one 15 and an oil passage two 14, and the oil passage one 15 and the oil passage two 14 are both used to guide the cooling liquid to the outer insert 13, the oil passage one 15 includes an axial flow channel one 4 and a groove one 5, the groove one 5 is arranged in alignment with one side of the outer insert 13, and the axial flow channel one 4 is formed between the thickened surface 8 and the protrusion on the outer circle of the drill end 31, and the oil passage two 14 includes an axial flow channel two 6 and a groove two 7, and the groove two 7 is arranged in alignment with the other side of the outer insert 13.
[0025] As shown in Figure 4 , the oil passage one 15 and the oil passage two 14 guide the cooling liquid to the two sides of the outer insert 13 respectively, increase the flowability of the cooling oil around the outer insert 13, and have the effect of reducing the cutting temperature, reducing the cutting edge wear speed, improving the service life, and ensuring the machining effect.
[0026] Preferably, as shown in Figure 3 , the axial flow channel two 6 and the groove two 7 both have an edge passing structure, that is, a bevel is arranged at the edge position of the axial flow channel two 6 and the groove two 7, so that the cooling liquid can overflow through the edge of the axial flow channel two 6 and the groove two 7, and is used to guide the cooling liquid to the periphery of the outer insert 13, and increase the cooling flow.
[0027] It will be understood by those skilled in the art that the above description and the embodiments of the present application shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been completely and effectively achieved. The function and structural principle of the present application have been demonstrated and explained in the embodiments, and the embodiments of the present application can have any deformation and modification without departing from the principle.
Claims
1. A deep hole drill characterized by: The drill bit comprises a body (3), a chip flute (11), a thickened surface (8) and an outer blade (13), the body (3) has a drill tip (31), the thickened surface (8) is arranged on the outer circle of the drill tip (31) and is located outside the chip flute (11), the thickened surface (8) is used to reduce the gap between the outer circle of the chip flute (11) and the outer circle of the drill tip (31), an oil passage one (15) is arranged at the outer circle of the drill tip (31), and the oil passage one (15) is used to guide the flow of cooling liquid to the outer blade (13).
2. The deep hole drill of claim 1, wherein: The deep hole drill further comprises an inner blade (2).
3. The deep hole drill of claim 2, wherein: An oil passage two (14) is further arranged at the drill tip (31), the oil passage two (14) is used to guide the flow of cooling liquid to the outer blade (13), and the oil passage one (15) and the oil passage two (14) guide the cooling liquid to the two sides of the outer blade (13) respectively.
4. The deep hole drill of claim 3, wherein: The oil passage one (15) comprises an axial flow channel one (4) and a groove one (5), and the groove one (5) is arranged in alignment with one side of the outer blade (13).
5. The deep hole drill of claim 4, wherein: The axial flow channel one (4) is formed between the thickened surface (8) and the protrusion on the outer circle of the drill tip (31).
6. A gun drill according to any of claims 3 to 5, wherein: The oil passage two (14) comprises an axial flow channel two (6) and a groove two (7), and the groove two (7) is arranged in alignment with the other side of the outer blade (13).
7. The deep hole drill of claim 6, wherein: The axial flow channel two (6) and the groove two (7) both have an edge-through structure, which is used to guide the cooling liquid to the periphery of the outer blade (13) and increase the cooling flow.
8. A deep hole drill according to claim 1 or 7, characterised in that: The thickened surface (8) is arranged around the edge of the chip flute (11) on the outer circle of the drill tip (31).