Self-cooling technology of machined spiral groove twist drill and machining method thereof
A technology of spiral grooves and processing methods, which is applied to twist drills, metal processing equipment, parts of boring machines/drilling machines, etc., can solve problems such as inability to achieve cooling effects, twist drills are not durable, and the hardness of the cutter head is reduced, so as to save energy. resources, improve efficiency, and reduce the effect of cutting resistance
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Embodiment approach 1
[0038] Such as figure 1 , Figure 6-Figure 9 , Figure 10-Figure 13 As shown, the self-cooling technology and processing method of the machine-added spiral groove twist drill of the first embodiment of the present invention mainly relate to the machine-added twist drill for mechanical processing, wherein, Figure 7 The drill point in the axial center is not chamfered, so the chisel edge is larger and the cutting resistance is also larger. Figure 8 Although the drill point in the axial center is chamfered, there is still a reduced chisel edge, and the cutting resistance is relatively Figure 7 reduced a lot, Figure 9-Figure 10 After chamfering, the drill point in the axial center has become a sharp edge without a chisel edge, and the cutting resistance is the smallest. Figure 10-Figure 11 A cooling hole 16 is set on the tapered shank 12 and straight shank 12 of the twist drill, and the other end of the cooling hole 16 is integrated with the tapered shank 12 and the strai...
Embodiment approach 2
[0042] Such as figure 2 , Figure 6-Figure 9 , Figure 10-Figure 13 As shown in Embodiment 2, the self-cooling technology and processing method of the machine-added twist drill of the second embodiment of the present invention, on the basis of the first embodiment, the present invention is a step-shaped protrusion on the rear cutting surface 4 At least one level of stepped composite rear cutting surface 4 is provided, and the stepped composite rear cutting surface 4 intersects with the helical cutting surface 11 to form a stepped composite cutting edge 5 .
[0043] The step-like setting on the rear cutting surface 4 not only improves the cutting stability of the twist drill but also improves the efficiency, reduces the cost and saves resources.
[0044] According to the above structure, it has been proved that the effect of cooling the tool from the cutting place by the coolant is far greater than that achieved by flowing downward from the top. On the one hand, the waste c...
Embodiment approach 3
[0046] Such as image 3 , Figure 6-Figure 9 , Figure 10-Figure 13 As shown, the self-cooling technology and processing method of the machine-added twist drill of the third embodiment of the present invention, on the basis of the first-second embodiment, the present invention is mainly provided with at least one notch on the cutting edge 5 The edge 50 extends toward the rear cutting surface 4 to form a groove 51 .
[0047] By arranging the notch edge 50 on the cutting edge 5, the cutting resistance of the cutting edge 5 is broken down, the cutting efficiency is greatly improved, the cost is reduced, and resources are saved.
[0048] According to the above structure, it has been proved that the effect of cooling the tool from the cutting place by the coolant is far greater than that achieved by flowing downward from the top. On the one hand, the waste chips cut by the tool also prevent the coolant from reaching the cutting place effectively, but the way of sending the coola...
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