Machining drill bit and machining device

Abstract

A machining drill bit comprises a handle body, a cutting body and a blade body which are sequentially connected, the end, away from the cutting body, of the blade body is provided with two conical faces and two chip containing grooves, the two conical faces and the two chip containing grooves are sequentially and alternately arranged in the circumferential direction of the blade body, and cutting edge parts are formed between the groove walls of the chip containing grooves and the corresponding conical faces. The cutting body is provided with two chip grooves and two liquid inlet grooves, the two chip grooves and the two liquid inlet grooves are sequentially and alternately formed in the circumferential direction of the cutting body, each chip groove and each liquid inlet groove are spirally formed in the direction from the blade body to the handle body, and a cutting blade is formed in the position, between each liquid inlet groove and the corresponding chip groove, of the cutting body. The end, away from the handle body, of each chip discharging groove extends to the corresponding chip containing groove, and the end, away from the handle body, of each liquid inlet groove extends to the conical face. The machining device comprises the machining drill bit. The machining drill bit and the machining device can effectively reduce the cutting heat, improve the cutting efficiency and prolong the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a processing drill bit and a processing device. Background Art

[0002] At present, when the drill bit is performing metal cutting processing, especially when drilling stainless steel products, the heat dissipation of the drill bit during the cutting process is poor, and a large amount of cutting heat is easily generated during the cutting process, which leads to the formation of a hardened layer under the machined surface in the hole wall, which is not conducive to the secondary cutting of the drill bit. In addition, the friction between the hardened layer and the drill bit causes the drill bit to produce problems such as crater wear and groove wear, which seriously affects the cutting efficiency and service life of the drill bit. Utility Model Content

[0003] In view of the above situation, it is necessary to provide a processing drill bit and a processing device to reduce cutting heat and improve cutting efficiency and service life.

[0004] The present application embodiment provides a processing drill bit, comprising:

[0005] A handle body, a cutting body and a blade body connected in sequence, the end of the blade body away from the cutting body has two conical surfaces and two chip grooves, the two conical surfaces and the two chip grooves are alternately arranged in sequence along the circumference of the blade body, and a cutting edge portion is formed between the groove wall of the chip groove and the corresponding conical surface, the cutting body is provided with two chip grooves and two liquid inlet grooves, the two chip grooves and the two liquid inlet grooves are alternately arranged in sequence along the circumference of the cutting body, and each of the chip grooves and each of the liquid inlet grooves are respectively spirally arranged in the direction from the blade body to the handle body, a cutting edge is formed on the cutting body between each of the liquid inlet grooves and each of the chip grooves, each of the chip grooves extends from one end of the handle body to the corresponding chip groove, and each of the liquid inlet grooves extends from one end of the handle body to the conical surface.

[0006] In some embodiments, a groove depth of each of the liquid inlet grooves is smaller than a groove depth of each of the chip discharge grooves.

[0007] In some embodiments, the processing drill bit also includes a connecting groove and a plurality of liquid outlet holes, wherein the connecting groove sequentially penetrates the handle body and the cutting body along a direction from the handle body to the blade body, and the plurality of liquid outlet holes are evenly arranged at the bottom of the chip removal groove and the liquid inlet groove and are all connected to the connecting groove.

[0008] In some embodiments, the chip groove is transitionally connected to the corresponding cutting edge portion via a front cutting surface, and the front cutting surface is a curved surface.

[0009] In some embodiments, the connection between the flute wall of the chip flute and the flute bottom of the chip flute is an arc-shaped structure.

[0010] In some embodiments, the chip removal groove and the liquid inlet groove have the same helix angle, and the helix angle ranges from 25° to 35°.

[0011] In some embodiments, the drill point angle of the blade is in the range of 130°-140°.

[0012] In some embodiments, the cutting edge is a curved cutting edge.

[0013] In some embodiments, the angle between the extension direction of the flute bottom of the chip flute and the axial direction of the cutting body is in the range of 40°-60°.

[0014] An embodiment of the present application also provides a processing device, including the processing drill bit described in the above embodiment.

[0015] When the processing drill and the processing device are processing a hole on a product, the two chip grooves and the two liquid inlet grooves simultaneously receive the coolant provided by the external liquid supply part, which can increase the contact area between the coolant and the hole wall and the processing drill, effectively reduce the cutting heat, and thus improve the cutting efficiency and service life; in addition, two cutting edges are formed on the outer wall of the cutting body through the two liquid inlet grooves and the two chip grooves, which can make the processing drill contact with the hole wall through the two cutting edges at the same time when processing the product, thereby balancing the cutting force on both sides of the processing drill, so that the cutting force is evenly distributed on the processing The two sides of the drill bit allow the processing drill bit to maintain a stable state during the drilling process, avoiding vibration and deflection of the processing drill bit, while reducing the squeezing and friction of the chips on the processing drill bit, thereby reducing the radial force of the processing drill bit, and then the processing drill bit can drill holes stably, improving the drilling stability; in addition, by extending the liquid inlet groove away from the end of the handle body to the connection between the cutting body and the blade body, it is avoided that the liquid inlet groove extends to the tapered surface and the cross-sectional area of ​​the blade body along the radial direction of the cutting body is too small, thereby improving the structural strength of the blade body and thereby increasing the service life of the processing drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a processing drill bit provided in an embodiment of the present application.

[0017] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the processing drill bit from another angle is shown.

[0018] Figure 3 for Figure 1 A front view of the machining drill bit is shown.

[0019] Main component symbols

[0020] Processing drill 100

[0021] Handle 10

[0022] Cutting body 20

[0023] Chip groove 21

[0024] Liquid inlet tank 22

[0025] Cutting edge 23

[0026] Blade 30

[0027] Conical surface 31

[0028] Chip groove 32

[0029] Cutting edge 321

[0030] Arc structure 322

[0031] Rake face 33

[0032] Connecting groove 40

[0033] Liquid outlet 50

[0034] Preset Angle A DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 The embodiment of the present application provides a processing drill 100, comprising a handle body 10, a cutting body 20 and a blade body 30 connected in sequence, for processing a hole on a product. The material of the product may be an alloy material, such as stainless steel.

[0040] See also Figure 1 and Figure 2 The end of the blade body 30 away from the cutting body 20 has two conical surfaces 31 and two chip grooves 32, the two conical surfaces 31 and the two chip grooves 32 are alternately arranged in sequence along the circumference of the blade body 30, and a cutting edge portion 321 is formed between the groove wall of the chip groove 32 and the corresponding conical surface 31. The cutting body 20 is provided with two chip grooves 21 and two liquid inlet grooves 22, the two chip grooves 21 and the two liquid inlet grooves 22 are alternately arranged in sequence along the circumference of the cutting body 20, and each chip groove 21 and each liquid inlet groove 22 are respectively spirally arranged in the direction from the blade body 30 to the handle body 10, and a cutting edge 23 is formed on the cutting body 20 between each liquid inlet groove 22 and each chip groove 21, each chip groove 21 extends from one end of the handle body 10 to the corresponding chip groove 32 and is connected to the corresponding chip groove 32, and each liquid inlet groove 22 extends from one end of the handle body 10 to the connection between the cutting body 20 and the conical surface 31.

[0041] When the processing drill 100 performs hole processing on a product, the two chip grooves 21 and the two liquid inlet grooves 22 simultaneously receive the coolant provided by the external liquid supply part, which can increase the contact area between the coolant and the hole wall and the processing drill 100, effectively reduce the cutting heat, and thus improve the cutting efficiency and service life; in addition, two cutting edges 23 are formed on the outer wall of the cutting body 20 through the two liquid inlet grooves 22 and the two chip grooves 21, so that the processing drill 100 can contact the hole wall through the two cutting edges 23 at the same time when processing the product, thereby balancing the cutting force on both sides of the processing drill 100, so that the cutting force is evenly distributed on both sides of the processing drill 100. , so that the processing drill bit 100 maintains a stable state during the drilling process, avoids vibration and deflection of the processing drill bit 100, and at the same time reduces the squeezing and friction of the chips on the processing drill bit 100, thereby reducing the radial force of the processing drill bit 100, and then the processing drill bit 100 can drill stably, thereby improving the drilling stability; in addition, the liquid inlet groove 22 is extended to the end away from the handle body 10 to the connection between the cutting body 20 and the blade body 30, so as to avoid the liquid inlet groove 22 extending to the tapered surface 31 so that the cross-sectional area of ​​the blade body 30 along the radial direction of the cutting body 20 is too small, thereby improving the structural strength of the blade body 30, and thereby improving the service life of the processing drill bit 100.

[0042] Furthermore, by providing the above-mentioned chip groove 32, when the cutting edge portion 321 cuts the product to form chips, the chip groove 32 can provide a storage space for temporarily storing the chips, thereby preventing too many chips from being transported to the chip groove 21 in a short period of time and blocking the chip groove 21, thereby preventing the processing drill bit 100 from being stuck and damaged. At the same time, the chip groove 32 can also guide the chips to be stably transported from the cutting edge portion 321 to the chip groove 21 along a predetermined path, thereby realizing orderly chip removal of the processing drill bit 100, reducing the damage of the chips to the processing drill bit 100 and the hole wall, and improving the chip removal stability and the processing quality of the product.

[0043] See also Figure 1 In some embodiments, the depth of each liquid inlet groove 22 is less than the depth of each chip discharge groove 21 .

[0044] In this way, since the liquid inlet groove 22 only needs to transport coolant to the hole processed by the processing drill bit 100, the groove depth of the liquid inlet groove 22 is set to be smaller than the groove depth of the chip groove 21, so as to avoid the groove depth of the liquid inlet groove 22 being too large, which will reduce the cross-sectional area of ​​the processing drill bit 100 along the radial direction of the cutting body 20 and reduce the bending and torsion resistance and rigidity of the processing drill bit 100, thereby ensuring the structural strength of the processing drill bit 100, which is beneficial to ensuring the service life of the processing drill bit 100.

[0045] In some embodiments, the machining drill bit 100 also includes a connecting groove 40 and a plurality of liquid outlet holes 50. The connecting groove 40 sequentially penetrates the handle body 10 and the cutting body 20 along the direction from the handle body 10 to the blade body 30 and is connected to an external liquid supply component. The plurality of liquid outlet holes 50 are evenly arranged at the bottom of the chip removal groove 21 and the liquid inlet groove 22 and are all connected to the connecting groove 40.

[0046] Thus, by providing the above-mentioned connecting groove 40 and multiple liquid outlet holes 50, the coolant can be directly delivered to the cutting area of ​​the processing drill bit 100 through the multiple liquid outlet holes 50, so as to quickly reduce the cutting heat generated by the processing drill bit 100, thereby improving the cooling efficiency.

[0047] In some embodiments, the chip groove 21 is transitionally connected to the corresponding cutting edge portion 321 through a rake surface 33 , and the rake surface 33 is a curved surface.

[0048] In this way, by setting the front cutting edge 33 as a curved surface, the chip conveying direction can be guided so that the chips are continuously conveyed from the cutting edge portion 321 to the chip groove 21, avoiding the accumulation of chips at the cutting body 30 and hindering the discharge of newly generated chips, thereby further improving the cutting efficiency and chip removal efficiency.

[0049] See also Figure 2 In some embodiments, the connection between the groove wall of the chip groove 32 and the groove bottom of the chip groove 32 is an arc structure 322.

[0050] In this way, by setting the above-mentioned arc structure 322, the arc structure 322 can guide the chips from the chip groove 32 to the chip discharge groove 21, reduce the retention and accumulation of chips in the chip groove 32, thereby reducing the wear and damage of the processing drill bit 100 caused by chip blockage, and can also reduce the stress concentration points of the processing drill bit 100 at the cutting edge portion 321 and the bottom of the chip groove 32, which is beneficial to improve the structural strength and durability of the processing drill bit 100, and thus improve the service life of the processing drill bit 100.

[0051] See also Figure 3 In some embodiments, the helix angles of the chip removal groove 21 and the liquid inlet groove 22 are equal, and the helix angle ranges from 25° to 35°. The helix angle is preferably 30°.

[0052] When the helix angle is greater than 35°, the depth of the flute body of the chip groove 21 becomes deeper, which reduces the rigidity of the processing drill 100, and thus easily causes the processing drill 100 to be damaged. When the helix angle is less than 25°, the depth of the flute body of the chip groove 21 is too small, so that the chips cannot be quickly removed, and the chips block the chip groove 21, making it impossible for the processing drill 100 to rotate and process the product. In this way, by setting the helix angle range to 25°-35°, the structural strength of the processing drill 100 can be ensured, and the processing drill 100 can be prevented from being damaged during the drilling process due to reduced rigidity. At the same time, the chips can be guided to be quickly removed to the outside of the product, and the chips can be prevented from accumulating in the chip groove 21 and causing the processing drill 100 to be stuck.

[0053] In some embodiments, the blade angle of the blade 30 is 130°-140°, wherein the blade angle of the blade 30 is preferably 135°.

[0054] When the blade angle is less than 130°, the cutting area between the processing drill bit 100 and the product increases, which increases the cutting force, and further generates more cutting heat when drilling. When the blade angle is greater than 140°, the contact area between the blade 30 and the workpiece decreases, causing the drill bit to vibrate during the cutting process, thereby affecting the depth and straightness of the processed cavity in the product and reducing the processing quality. In this way, by setting the blade angle of the blade 30 to 130°-140°, the contact area between the blade 30 and the product can be maintained within the preset area, reducing the friction between the blade 30 and the product and reducing the cutting heat, while avoiding the vibration and deflection of the processing drill bit 100 during the cutting process, thereby improving the drilling stability.

[0055] In some embodiments, the cutting edge portion 321 is a curved cutting edge, so that the cutting force can be evenly distributed, thereby reducing the vibration of the machining drill bit 100 during the drilling process, helping to improve the accuracy of the hole and the machining stability of the machining drill bit 100. In addition, it can also guide the chips to be discharged along a preset path, reducing the accumulation and blockage of chips in the chip groove 32 of the machining drill bit 100, thereby reducing the wear of the machining drill bit 100.

[0056] In some embodiments, the angle between the extending direction of the bottom of the chip groove 32 and the axial direction of the cutting body 20 is in the range of 40°-60°, wherein the above angle is a preset angle A, and the preset angle A is preferably 50°.

[0057] When the preset angle A is less than 40°, the cross-sectional area of ​​the blade 30 in its radial direction is reduced, which reduces the ability of the blade 30 to withstand cutting force, thereby reducing the rigidity and structural strength of the processing drill 100. When the preset angle A is greater than 60°, the space for the chip groove 32 to accommodate chips is reduced, resulting in the chips being unable to be smoothly discharged into the chip groove 21. Due to the poor chip discharge, the friction between the chips and the processing drill 100 increases, thereby causing the cutting temperature of the processing drill 100 to increase, affecting the durability and product quality of the processing drill 100. In this way, by setting the angle range of the preset angle A to 40°-60°, the cross-sectional area of ​​the blade 30 in its radial direction can be guaranteed, which is conducive to ensuring the rigidity and structural strength of the processing drill 100, and at the same time, it is conducive to smoothly discharging the chips into the chip groove 21, reducing the friction between the processing drill 100 and the chips, effectively reducing the cutting heat, and improving the durability and product quality of the processing drill 100.

[0058] In some embodiments, the handle body 10 , the cutting body 20 and the blade body 30 are an integrally formed structure, which improves the structural strength of the processing drill bit 100 , enables the processing drill bit 100 to withstand greater cutting force and drilling pressure, and thereby increases the service life of the processing drill bit 100 .

[0059] In some embodiments, the processing drill bit 100 further includes a protective layer (not shown), which covers the outer surfaces of the handle body 10, the cutting body 20 and the blade body 30. For example, the protective layer can be a titanium nitride layer, an epoxy resin layer, or the like.

[0060] In this way, by covering the surface of the processing drill bit 100 with a protective layer, the mechanical properties of the processing drill bit 100, such as wear resistance, corrosion resistance and strength, can be improved, so that the processing drill bit 100 can be suitable for complex working environments and the service life of the processing drill bit 100 can be improved.

[0061] In some embodiments, the cutting body 20 is a right-handed right-cut structure, which can enable the chips generated by the machining drill bit 100 during drilling to be removed along the extension direction of the chip groove 21, thereby avoiding the accumulation of chips in the machining drill bit 100, improving the chip removal efficiency, and at the same time making the cutting force of the machining drill bit 100 during the drilling process evenly distributed, reducing the vibration and deflection of the machining drill bit 100, and improving the drilling accuracy and product quality.

[0062] The embodiment of the present application further provides a processing device (not shown), comprising the processing drill bit 100 described in the above embodiment.

[0063] When the processing device of the embodiment of the present application uses the processing drill bit 100 to process holes on a product, the cutting heat can be effectively reduced, thereby improving the chip removal efficiency and service life of the processing device.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A processing drill bit, characterized in that: include: A handle body, a cutting body and a blade body connected in sequence, the end of the blade body away from the cutting body has two conical surfaces and two chip grooves, the two conical surfaces and the two chip grooves are alternately arranged in sequence along the circumference of the blade body, and a cutting edge portion is formed between the groove wall of the chip groove and the corresponding conical surface, the cutting body is provided with two chip grooves and two liquid inlet grooves, the two chip grooves and the two liquid inlet grooves are alternately arranged in sequence along the circumference of the cutting body, and each of the chip grooves and each of the liquid inlet grooves are respectively spirally arranged in the direction from the blade body to the handle body, a cutting edge is formed on the cutting body between each of the liquid inlet grooves and each of the chip grooves, each of the chip grooves extends from one end of the handle body to the corresponding chip groove, and each of the liquid inlet grooves extends from one end of the handle body to the conical surface.

2. The processing drill bit according to claim 1, characterized in that: The groove depth of each of the liquid inlet grooves is smaller than the groove depth of each of the chip removal grooves.

3. The processing drill bit according to claim 1, characterized in that: The processing drill bit also includes a connecting groove and a plurality of liquid outlet holes. The connecting groove sequentially penetrates the handle body and the cutting body along the direction from the handle body to the cutting body. The plurality of liquid outlet holes are evenly arranged at the bottom of the chip removal groove and the liquid inlet groove and are all connected to the connecting groove.

4. The processing drill bit according to claim 1, characterized in that: The chip removal groove is transitionally connected to the corresponding cutting edge portion through a rake face, and the rake face is a curved surface.

5. The processing drill bit according to claim 1, characterized in that: The connection between the groove wall of the chip groove and the groove bottom of the chip groove is an arc structure.

6. The processing drill bit according to claim 1, characterized in that: The helix angles of the chip removal groove and the liquid inlet groove are equal, and the helix angle ranges from 25° to 35°.

7. The processing drill bit according to claim 1, characterized in that: The drill point angle of the blade body ranges from 130° to 140°.

8. The processing drill bit according to claim 1, characterized in that: The cutting edge is a curved cutting edge.

9. The processing drill bit according to claim 1, characterized in that: The included angle between the extending direction of the groove bottom of the chip groove and the axial direction of the cutting body is in the range of 40°-60°.

10. A processing device, characterized in that: Comprising a machining drill bit as described in any one of claims 1-9.

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