Machining drill bit facilitating chip breaking

Abstract

The invention relates to a machining drill bit facilitating chip breaking, and relates to the technical field of drilling equipment. The machining drill bit facilitating chip breaking comprises a drill bit body, the drill bit body comprises a body part and a drilling part, the drilling part is located at one end, in the length direction of the body part, of the body part and connected with the body part, and a plurality of stepped grooves are formed in the side wall of the drilling part so that the side wall of the drilling part can be in a stepped shape. The drill bit has the effect of reducing the probability that the inner wall of the hole is scratched by soft scraps wound on the drill bit.

Description

Technical Field

[0001] The present application relates to the technical field of drilling equipment, and in particular to a processing drill bit that is convenient for chip breaking. Background Art

[0002] With the continuous development of social economy and the increasing improvement of scientific and technological levels, my country's manufacturing industry is also developing continuously. The drill bit is a tool used to drill through holes or blind holes in solid materials. It can also expand existing holes. Therefore, it plays an important role in the manufacturing industry.

[0003] With respect to the above-mentioned related technologies, when the drill bit in the prior art is used to drill or expand holes in soft aluminum or other softer materials, the waste chips generated by soft aluminum and other softer materials are also softer, making it difficult for the waste chips generated during drilling to be broken. Therefore, during the drilling or expanding process, the softer waste chips will be wrapped around the drill bit, which makes it easy for the wrapped waste chips to come into contact with the inner wall of the hole, thereby increasing the probability of the inner wall of the hole being scratched by the waste chips, so there is room for improvement. Summary of the invention

[0004] In order to reduce the probability of the inner wall of the hole being scratched by the softer waste chips wrapped around the drill bit, the present application provides a processing drill bit that is easy to break chips.

[0005] The present application provides a processing drill bit that is convenient for chip breaking, which adopts the following technical solution: A processing drill bit that is easy to break chips includes a drill body. The drill body includes a main body part and a drilling part. The drilling part is located at one end of the main body part along its own length direction and is connected to the main body part. A plurality of step grooves are opened on the side wall of the drilling part so that the side wall of the drilling part is stepped.

[0006] By adopting the above technical scheme, compared with the prior art, the waste chips generated by the drill bit when drilling or expanding a softer material will be wrapped around the drill bit, so that the waste chips wrapped around the drill bit are easy to contact the inner wall of the hole, thereby increasing the probability of the inner wall of the hole being scratched by the waste chips. The present application provides a stepped groove on the drilling part so that the side wall of the drilling part is stepped, so that during the rotation of the drill bit, the waste chips generated by drilling can collide with the stepped side wall of the drilling part and bend after the collision. Under the action of subsequent centrifugal force, the chips break and fly out of the hole, effectively changing the rolling angle of the waste chips, so that the waste chips can be quickly disturbed and interrupted by the stepped side wall, effectively reducing the probability of the waste chips being too long during the drilling process, thereby effectively protecting the drill bit and reducing the probability of the inner wall of the hole being scratched by the softer waste chips wrapped around the drill bit.

[0007] Preferably, the drill bit body also includes a chamfering portion, which is located between the drilling portion and the main body, and the drilling portion and the main body are connected via the chamfering portion. A chamfering scraper is also provided on one end of the chamfering portion close to the drilling portion, and the chamfering scraper is arranged at an angle.

[0008] By adopting the above technical scheme and setting the chamfering part and the chamfering scraper, the drill bit of the present application can, when drilling a hole in a workpiece and the drilling depth reaches a specified depth, chamfer the intersection of the inner wall of the drilled hole and the outer wall of the workpiece, so that the drill bit of the present application has both drilling and chamfering functions, and thus enables the staff to open the hole and the chamfer on the hole only by using the drill bit of the present application, which effectively facilitates the staff to process the hole and improves the work efficiency.

[0009] Preferably, one end of the chamfering scraper extends into the chamfering part and is slidably connected to the chamfering part. A driving mechanism is also provided in the chamfering part, and the driving mechanism is used to drive the chamfering scraper to slide and make the chamfering scraper slide completely into the chamfering part.

[0010] By adopting the above-mentioned technical scheme and arranging the chamfering scraper and the driving mechanism, when the drill bit of the present application is not needed, the staff can use the driving mechanism to make the chamfering scraper completely slide into the chamfering part, thereby protecting the chamfering scraper, effectively reducing the chance of damage to the chamfering scraper, and at the same time reducing the chance of the staff accidentally touching the exposed chamfering scraper, effectively protecting the safety of the staff and improving the safety performance of the present application.

[0011] Preferably, the driving mechanism includes a driving assembly, a driving frame and a transmission frame, the driving frame is slidably connected to the chamfering portion, one end of the transmission frame is rotatably connected to the driving frame, and the other end of the transmission frame is rotatably connected to the chamfering scraper, and the driving assembly is used to drive the driving frame to slide along its own sliding direction.

[0012] By adopting the above technical solution and the specific setting of the driving mechanism, the staff can drive the driving frame to slide through the driving component, so that the driving frame drives the transmission frame to move, and the transmission frame drives the chamfering scraper to slide, thereby driving the chamfering scraper to slide, which effectively facilitates the staff to drive the chamfering scraper.

[0013] Preferably, the driving assembly includes a driving screw and a rotating sleeve, the driving screw is located in the chamfering portion and is rotatably connected to the chamfering portion, one end of the driving screw passes through the driving frame and is rotatably connected to the driving frame, the rotating sleeve is disposed on the drill body and is rotatably connected to the drill body, and the rotating sleeve is connected to the driving screw.

[0014] By adopting the above technical solution, the setting of the driving component enables the staff to hold and rotate the rotating sleeve, so that the rotating sleeve drives the driving screw to rotate, and then the driving screw drives the driving frame connected to its own thread to slide, thereby driving the driving frame; the setting of the rotating sleeve on the drill body effectively facilitates the staff to drive the driving screw, and the setting of the driving screw also effectively facilitates the staff to control the extension amount of the chamfering scraper.

[0015] Preferably, a locking assembly is also provided on the drill body, and the locking assembly includes a locking frame, which is sleeved on the drill body and slidably connected to the drill body. The locking frame is also provided with a locking rod along its own sliding direction and on one side close to the rotating sleeve, and the locking rod is inserted in the rotating sleeve.

[0016] By adopting the above technical scheme and setting the locking assembly, the staff can drive the locking frame to slide in the direction close to the rotating sleeve after fully retracting the chamfering scraper into the chamfering part, and make the locking rod on the locking frame inserted into the rotating sleeve, thereby locking the rotating sleeve, effectively reducing the probability of the chamfering scraper moving outside the chamfering part due to accidental slippage of the rotating sleeve, and effectively reducing the probability of the staff being injured by the chamfering scraper; at the same time, the presence of the locking assembly can also lock the chamfering scraper that slides out of the chamfering part, thereby reducing the probability of the chamfering scraper accidentally slipping with the chamfering part when working, and ensuring the chamfering effect of the present application.

[0017] Preferably, the locking assembly also includes a locking frame, which is sleeved on the drill body and located on a side of the locking frame away from the rotating sleeve. The locking frame is threadedly connected to the drill body, and is used to abut against the locking frame when being tightened on the drill body.

[0018] By adopting the above technical solution and setting the locking assembly, the locking frame can be locked by abutting the locking frame so that the locking frame is clamped by the locking frame and the rotating sleeve, thereby effectively reducing the probability of accidental slippage of the locking frame and further ensuring the chamfering effect of the present application.

[0019] Preferably, a sleeve portion is extended from one end of the locking frame close to the rotating sleeve, and a sleeve groove is formed at one end of the rotating sleeve close to the locking frame, and the sleeve portion is located in the sleeve groove. The locking assembly also includes an elastic member, and the elastic member is located in the sleeve groove. The elastic member is used to allow the locking frame to return to its initial position.

[0020] By adopting the above technical solution and arranging the elastic member, when the staff rotates the locking frame and causes the locking frame to gradually move away from the rotating sleeve, the compressed elastic member can continuously resist the locking frame and drive the locking frame to slide, thereby realizing automatic disengagement of the locking frame from the rotating sleeve, and then realizing automatic unlocking of the rotating sleeve, which effectively facilitates the use of the staff.

[0021] Preferably, a through groove is provided on the chamfered portion, the chamfering scraper is located in the through groove, and a closing mechanism is also provided in the chamfered portion, the closing mechanism includes a closing frame and a linkage assembly, the closing frame is slidably connected to the inner wall of the through groove, and the driving frame drives the closing frame to slide through the linkage assembly, thereby closing the through groove.

[0022] By adopting the above technical scheme, the setting of the closing mechanism enables the closing mechanism to close the outlet groove, thereby reducing the probability of the staff accidentally touching the chamfering scraper in the outlet groove, further ensuring the safety of the staff; at the same time, the existence of the closing mechanism also enables the closing mechanism to close the outlet groove, thereby reducing the probability of excessive dust and debris entering the outlet groove, effectively ensuring the service life of the chamfering scraper.

[0023] Preferably, the linkage assembly includes an active frame and a driven frame, the active frame is connected to the chamfering scraper, the driven frame is connected to the closed frame, the active frame is provided with a linkage portion, the closed frame is provided with a linkage groove, the length direction of the linkage groove is inclined to the sliding direction of the chamfering scraper, the linkage portion extends into the linkage groove and abuts against the inner wall of the linkage groove.

[0024] By adopting the above technical solution and setting the linkage component, the chamfering scraper can drive the active frame to slide together when sliding, so that the linkage part on the active frame slides in the linkage groove. At this time, the linkage part abuts against the inner wall of the linkage groove, and pushes the driven frame and the closed frame to slide together, so that the closed frame gradually opens the groove to make way for the chamfering scraper, realizing the linkage between the chamfering scraper and the closed frame, so that the driving component can drive the chamfering scraper and the closed frame to slide at the same time, which effectively facilitates the operation of relevant personnel.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The step groove on the drilling part makes the side wall of the drilling part step-shaped, so that during the rotation of the drill bit, the waste chips generated by drilling can collide with the stepped side wall on the drilling part and bend after the collision. Under the action of subsequent centrifugal force, the waste chips break and fly out of the hole, which effectively changes the rolling angle of the waste chips, so that the waste chips can be quickly disturbed and interrupted by the stepped side wall, effectively reducing the probability of waste chips being too long during the drilling process, thereby effectively protecting the drill bit and reducing the probability of the inner wall of the hole being scratched by the softer waste chips wrapped around the drill bit; 2. The setting of the chamfering part and the chamfering scraper enables the drill bit of the present application to drill a hole in the workpiece, and when the drilling depth reaches the specified depth, the intersection of the inner wall of the drilled hole and the outer wall of the workpiece is chamfered, so that the drill bit of the present application has two functions of drilling and chamfering, and the staff can realize the opening of the hole and the opening of the chamfer on the hole only by using the drill bit of the present application, which effectively facilitates the staff to process the hole and improves the work efficiency; 3. The setting of the driving assembly enables the staff to hold and rotate the rotating sleeve, so that the rotating sleeve drives the driving screw to rotate, and then the driving screw drives the driving frame connected to its own thread to slide, thereby driving the driving frame; the setting of the rotating sleeve on the drill body effectively facilitates the staff to drive the driving screw, and the setting of the driving screw also effectively facilitates the staff to control the extension amount of the chamfering scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the entire processing drill bit for facilitating chip breaking in Example 1 of the present application.

[0027] Figure 2 It is a schematic diagram of the entire processing drill bit for facilitating chip breaking in Example 2 of the present application.

[0028] Figure 3 It is a structural schematic diagram used to reflect the drive frame in Example 2 of the present application.

[0029] Figure 4 It is a schematic diagram of the structure of the locking frame used to reflect the embodiment 2 of the present application.

[0030] Explanation of the accompanying drawings: 1. drill body; 11. body part; 12. drilling part; 13. chamfering part; 2. stepped groove; 3. through groove; 4. chamfering scraper; 41. extension part; 5. driving mechanism; 51. driving assembly; 511. driving screw; 512. rotating sleeve; 5121. connecting part; 52. driving frame; 53. transmission frame; 6. closing mechanism; 61. closing frame; 62. linkage assembly; 621. active frame; 6211. linkage part; 622. driven frame; 6221. linkage groove; 7. locking assembly; 71. locking frame; 711. sleeve part; 712. locking rod; 72. elastic member; 73. locking frame; 8. sleeve groove; 9. locking hole. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] Embodiment 1: Embodiment 1 of the present application discloses a processing drill bit that facilitates chip breaking. Figure 1 The processing drill bit for chip breaking includes a drill body 1, which includes a main body portion 11 and a drilling portion 12. The drilling portion 12 is located at one end of the main body portion 11 along its own length direction and is connected to the main body portion 11. A plurality of step grooves 2 are opened on the side wall of the drilling portion 12 so that the side wall of the drilling portion 12 is stepped.

[0033] Reference Figure 1 The main body 11 and the drilling part 12 are integrally formed, and the end of the main body 11 away from the drilling part 12 is used to be installed on a device that drives the drill body 1 to rotate. The diameter of the drilling part 12 is smaller than the diameter of the main body 11, and each stepped groove 2 is provided on the end of the drilling part 12 away from the main body 11. In the embodiment of the present application, the number of stepped grooves 2 on the drilling part 12 is set to two, and the two stepped grooves 2 are respectively located on opposite sides of the drilling part 12 to ensure the stability of the drilling part 12 when rotating. The end of the drilling part 12 away from the main body is protruding outward to facilitate the opening of the hole.

[0034] The implementation principle of a processing drill bit that is easy to break chips in Example 1 of the present application is as follows: by opening a stepped groove 2 on the drilling portion 12, the side wall of the drilling portion 12 can be made stepped, so that during the rotation of the drill bit, the waste chips generated by drilling can collide with the stepped side wall of the drilling portion 12 and bend after the collision. Under the action of subsequent centrifugal force, the chips break and fly out of the hole, effectively changing the rolling angle of the waste chips, so that the waste chips can be quickly disturbed and broken by the stepped side wall, effectively reducing the probability of the waste chips being too long during the drilling process, thereby effectively protecting the drill bit and reducing the probability of the inner wall of the hole being scratched by softer waste chips.

[0035] Embodiment 2: The difference between the second embodiment of the present application and the first embodiment is that: Figure 2 and Figure 3 A chamfered portion 13 is further provided between the main body 11 and the drilling portion 12, and the main body 11 and the drilling portion 12 are integrally formed with the chamfered portion 13. The diameter of the chamfered portion 13 is larger than the diameter of the drilling portion 12, and a chamfer is provided at the intersection of the chamfered portion 13 and the drilling portion 12. A plurality of through grooves 3 are provided at the chamfer of the drilling portion 12. In the embodiment of the present application, the number of the through grooves 3 is set to four, and they are arranged at equal angles along the circumference of the axis of the chamfered portion 13.

[0036] Reference Figure 2 and Figure 3 Each outlet groove 3 is provided with a chamfering scraper 4, and each chamfering scraper 4 is tilted to achieve the chamfering of the intersection of the inner wall of the hole and the outer wall of the workpiece. Each chamfering scraper 4 is slidably connected to the inner wall of the outlet groove 3, and the sliding direction is perpendicular to its own tilting direction, and can slide out of the inner wall of the chamfering scraper 4. An extension part 41 is provided at one end of each chamfering scraper 4 away from its own cutting edge to facilitate the driving of the chamfering scraper 4, and the extension part 41 is located on the side of the corresponding chamfering scraper 4 closer to the drilling part 12.

[0037] Reference Figure 2 and Figure 3 A driving mechanism 5 is also provided in the chamfering part 13, and the driving mechanism 5 is used to drive each chamfering scraper 4 to slide. The driving mechanism 5 includes a driving assembly 51, a driving frame 52 and a transmission frame 53. The driving assembly 51 includes a driving screw 511 and a rotating sleeve 512. One end of the driving screw 511 is located in the main body 11 and is coaxially arranged with the main body 11. The other end of the driving screw 511 extends in a direction close to the drilling part 12 and extends into the chamfering part 13. Both ends of the driving screw 511 are rotatably connected to the main body 11 and the drilling part 12 through bearings.

[0038] Reference Figure 2 , Figure 3 and Figure 4 , the rotating sleeve 512 is sleeved outside the main body 11 and is rotatably connected to the main body 11. A connecting portion 5121 is extended from the inner side of the rotating sleeve 512 into the main body 11, and one end of the driving screw 511 located in the main body 11 is fixedly installed on the connecting portion 5121, so that the rotating sleeve 512 can drive the driving screw 511 to rotate together. The driving frame 52 is located in the chamfered portion 13 and is slidably connected to the chamfered portion 13, and the sliding direction of the driving frame 52 is the axial direction of the chamfered portion 13. One end of the driving screw 511 passes through the driving frame 52 and is threadedly connected to the driving frame 52, so that the driving frame 52 can be driven.

[0039] Reference Figure 2and Figure 3 In the embodiment of the present application, the transmission frames 53 are arranged in four groups, and the four groups of transmission frames 53 are arranged one by one corresponding to the four chamfering scrapers 4, and two transmission frames 53 are arranged in each group. The four groups of transmission frames 53 are respectively located around the transmission frames 53, and the two transmission frames 53 in each group are respectively located on the opposite sides of the corresponding chamfering scraper 4.

[0040] Reference Figure 2 and Figure 3 One end of each transmission frame 53 is rotatably connected to the driving frame 52 through a pin shaft, and the other end of each transmission frame 53 is rotatably connected to the extension portion 41 on the corresponding chamfering scraper 4 through a pin shaft to drive the chamfering scraper 4.

[0041] Reference Figure 2 and Figure 3 In the initial state, that is, when the drill bit of the present application is not in use, the chamfering scraper 4 is completely located in the corresponding outlet groove 3. When it is necessary to move the end of the chamfering scraper 4 with the cutting edge out of the corresponding outlet groove 3, the rotating sleeve 512 is rotated, and the rotating sleeve 512 drives the driving screw 511 to rotate together, so that the driving screw 511 drives the driving frame 52 to slide toward the end close to the drilling portion 12. In this process, the driving frame 52 drives each transmission frame 53 to move, and the transmission frame 53 drives the corresponding chamfering scraper 4 to slide, and the end of the chamfering scraper 4 with the cutting edge is gradually moved out of the outlet groove 3.

[0042] Reference Figure 2 and Figure 3 A closing mechanism 6 is also provided in the chamfered portion 13. In the embodiment of the present application, the number of the closing mechanisms 6 is set to four, and the closing mechanisms 6 correspond to the outlet slots 3 one by one, and are all located in the corresponding outlet slots 3. Each closing mechanism 6 includes a closing frame 61 and a linkage assembly 62. In the embodiment of the present application, the number of the closing frame 61 and the linkage assembly 62 in each closing mechanism 6 is set to two, and they correspond one by one.

[0043] Reference Figure 2 and Figure 3 The two closing frames 61 are respectively located at opposite sides of the outlet groove 3 and at the side of the corresponding chamfering scraper 4 away from the driving frame 52. Each closing frame 61 is slidably connected to the inner wall of the outlet groove 3, and the sliding direction of each closing frame 61 is perpendicular to the sliding direction of the corresponding chamfering scraper 4. When the chamfering scraper 4 is completely located in the closing groove, the two closing frames 61 abut against each other, thereby closing the outlet groove 3.

[0044] Reference Figure 2 and Figure 3In the embodiment of the present application, the length of the closing frame 61 in each closing mechanism 6 that is farther away from the drilling portion 12 is greater than the length of another closing frame 61 in the corresponding closing mechanism 6 to adapt to the setting position of the extension portion 41.

[0045] Reference Figure 2 and Figure 3 Each linkage assembly 62 includes an active frame 621 and a driven frame 622, and one end of each active frame 621 is fixedly connected to the extension portion 41 on the corresponding chamfering scraper 4. A linkage portion 6211 is provided on the other end of each active frame 621, and each linkage portion 6211 is integrally formed with the corresponding active frame 621.

[0046] Reference Figure 2 and Figure 3 One end of each driven frame 622 is fixedly connected to the side end of the corresponding closed frame 61, and the extension direction of the other end of each driven frame 622 is inclined to the sliding direction of the corresponding closed frame 61. A linkage groove 6221 is formed through each driven frame 622, and the linkage groove 6221 corresponds to the linkage portion 6211, and each linkage portion 6211 passes through the corresponding linkage groove 6221 and abuts against the inner side wall of the corresponding linkage groove 6221.

[0047] Reference Figure 2 and Figure 3 In the embodiment of the present application, the inclined angle between the driven frame 622 on the closing frame 61 farther from the drilling portion 12 in the closing mechanism 6 and the closing frame 61 is smaller than the inclined angle between the other closing frame 61 in the closing mechanism 6 and the corresponding driven frame 622, so that the sliding amount of the closing frame 61 farther from the drilling portion 12 is greater than the sliding amount of the other closing frame 61, thereby ensuring the smooth closing of the through groove 3. Reference Figure 2 and Figure 3 In the initial state, that is, when the chamfering scraper 4 is completely located in the outlet groove 3, the closing frame 61 closes the outlet groove 3. At this time, the linkage parts 6211 are all located at the end of the linkage groove 6221 close to the driving frame 52, and the chamfering scraper 4 is not in contact with the driving frame 52. When the driving frame 52 drives the chamfering scraper 4 to slide away from the driving frame 52, the linkage part 6211 on the active frame 621 continues to abut against the inner side wall of the linkage groove 6221, thereby pushing the driven frame 622 and the closing frame 61 to slide, so that the closing frame 61 gradually opens the outlet groove 3. After the closing frame 61 completely opens the outlet groove 3, the driving frame 52 continues to drive the chamfering scraper 4 to slide, and the end of the chamfering scraper 4 with the cutting edge gradually slides out of the outlet groove 3.

[0048] Reference Figure 2 and Figure 4The main body 11 is also provided with a locking assembly 7, which includes a locking frame 71 and an elastic member 72. The locking frame 71 is slidably connected to the main body 11, and the sliding direction of the locking frame 71 is only the axial direction of the main body 11. The locking frame 71 is located on the side of the rotating sleeve 512 away from the drilling portion 12, and a sleeve portion 711 is extended from one end of the locking frame 71 close to the rotating sleeve 512. A sleeve groove 8 is also provided on the outer wall of one end of the rotating sleeve 512 close to the locking frame 71, and the sleeve portion 711 is located in the sleeve groove 8, so that the rotating sleeve 512 is sleeved on the sleeve portion 711.

[0049] Reference Figure 2 and Figure 4 The outer diameter of one end of the sleeve portion 711 located in the sleeve groove 8 is larger than the outer diameter of the rest of the portion, so as to reduce the probability of the sleeve portion 711 sliding out of the rotating sleeve 512. In the embodiment of the present application, the elastic member 72 is configured as a pressure spring, which is located in the sleeve groove 8 and on the side of the sleeve portion 711 close to the chamfered portion 13. One end of the pressure spring abuts against the end of the sleeve portion 711, and the other end abuts against the inner wall of the sleeve groove 8.

[0050] Reference Figure 2 and Figure 4 The locking frame 71 is also provided with a locking rod 712 at one end close to the rotating sleeve 512. The number of the locking rods 712 is set to be several and distributed at equal angles along the circumference of the axis direction of the locking frame 71. Each locking rod 712 is integrally formed with the locking frame 71. A plurality of locking holes 9 are also provided on the outer wall of the end of the rotating sleeve 512 close to the locking frame 71. The locking holes 9 are arranged one by one with the locking rods 712, and each locking rod 712 is inserted into the corresponding locking hole 9.

[0051] Reference Figure 2 and Figure 4 The locking assembly 7 further includes a locking frame 73, which is sleeved on the main body 11 and threadedly connected to the main body 11, so that the staff can fix the locking frame 73 to the main body 11 by tightening the locking frame 73. One end of the locking frame 73 close to the locking frame 71 is in contact with the outer wall of the locking frame 71, so that the locking frame 71 is restricted by the locking frame 71 and locked.

[0052] Reference Figure 2 and Figure 4In the initial state, that is, when the locking frame 73, the locking frame 71 and the rotating sleeve 512 are in contact with each other in sequence, the elastic member 72 is in a compressed state, and the locking frame 73 is screwed onto the main body 11. When the locking of the rotating sleeve 512 needs to be released, the locking frame 73 is rotated and gradually moves away from the locking frame 71 to release the locking of the locking frame 71. In this process, the elastic member 72 gradually returns from the compressed state to the relaxed state, thereby driving the locking frame 71 to gradually move away from the rotating sleeve 512, so that the locking rod 712 is completely separated from the locking groove, and the rotating sleeve 512 is unlocked.

[0053] The implementation principle of a processing drill bit that is convenient for chip breaking in Example 2 of the present application is as follows: when the drill bit of the present application needs to be used and the hole drilled subsequently needs to be chamfered, the locking frame 73 is rotated and loosened before use, and after the locking frame 71 is completely separated from the rotating sleeve 512, the rotating sleeve 512 is rotated to drive the driving screw 511. In this process, the driving frame 52 drives the chamfering scraper 4 to slide in a direction away from the driving frame 52, so that the linkage part 6211 on the active frame 621 continues to abut against the inner side wall of the linkage groove 6221, pushing the driven frame 622 and the closing frame 61 to slide, thereby causing the closing frame 61 to gradually open the outlet groove 3. When the closing frame 61 completely opens the outlet groove 3, the driving frame 52 continues to drive the chamfering scraper 4 to slide, and causes the end of the chamfering scraper 4 with a cutting edge to gradually slide out of the outlet groove 3.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A processing drill bit for facilitating chip breaking, comprising a drill bit body (1), characterized in that: The drill bit body (1) comprises a main body portion (11) and a drilling portion (12); the drilling portion (12) is located at one end of the main body portion (11) along its own length direction and is connected to the main body portion (11); a plurality of stepped grooves (2) are provided on the side wall of the drilling portion (12), so that the side wall of the drilling portion (12) is stepped.

2. A processing drill bit for easy chip breaking according to claim 1, characterized in that: The drill bit body (1) further comprises a chamfering portion (13), wherein the chamfering portion (13) is located between the drilling portion (12) and the main body (11), and the drilling portion (12) and the main body (11) are connected via the chamfering portion (13), and a chamfering scraper (4) is also arranged on one end of the chamfering portion (13) close to the drilling portion (12), and the chamfering scraper (4) is arranged at an angle.

3. A processing drill bit for easy chip breaking according to claim 2, characterized in that: One end of the chamfering scraper (4) extends into the chamfering portion (13) and is slidably connected to the chamfering portion (13). A driving mechanism (5) is also provided in the chamfering portion (13). The driving mechanism (5) is used to drive the chamfering scraper (4) to slide and enable the chamfering scraper (4) to completely slide into the chamfering portion (13).

4. A processing drill bit for easy chip breaking according to claim 3, characterized in that: The driving mechanism (5) comprises a driving assembly (51), a driving frame (52) and a transmission frame (53); the driving frame (52) is slidably connected to the chamfering portion (13); one end of the transmission frame (53) is rotationally connected to the driving frame (52); the other end of the transmission frame (53) is rotationally connected to the chamfering scraper (4); and the driving assembly (51) is used to drive the driving frame (52) to slide along its own sliding direction.

5. A processing drill bit for easy chip breaking according to claim 4, characterized in that: The driving assembly (51) comprises a driving screw (511) and a rotating sleeve (512); the driving screw (511) is located in the chamfered portion (13) and is rotatably connected to the chamfered portion (13); one end of the driving screw (511) passes through the driving frame (52) and is rotatably connected to the driving frame (52); the rotating sleeve (512) is sleeved on the drill body (1) and is rotatably connected to the drill body (1); and the rotating sleeve (512) is connected to the driving screw (511).

6. A processing drill bit for easy chip breaking according to claim 5, characterized in that: The drill body (1) is also provided with a locking assembly (7), the locking assembly (7) comprising a locking frame (71), the locking frame (71) being sleeved on the drill body (1) and slidably connected to the drill body (1), the locking frame (71) being also provided with a locking rod (712) along its own sliding direction and on a side close to the rotating sleeve (512), the locking rod (712) being inserted into the rotating sleeve (512).

7. A processing drill bit for easy chip breaking according to claim 6, characterized in that: The locking assembly (7) further comprises a locking frame (73), wherein the locking frame (73) is sleeved on the drill body (1) and is located on a side of the locking frame (71) away from the rotating sleeve (512), and the locking frame (73) is threadedly connected to the drill body (1). The locking frame (73) is used to abut against the locking frame (71) when being screwed onto the drill body (1).

8. A processing drill bit for easy chip breaking according to claim 6, characterized in that: A sleeve portion (711) is further extended from one end of the locking frame (71) close to the rotating sleeve (512); a sleeve groove (8) is further provided at one end of the rotating sleeve (512) close to the locking frame (71); the sleeve portion (711) is located in the sleeve groove (8); the locking assembly (7) further comprises an elastic member (72); the elastic member (72) is located in the sleeve groove (8); and the elastic member (72) is used for allowing the locking frame (71) to return to an initial position.

9. A processing drill bit for easy chip breaking according to claim 4, characterized in that: The chamfering portion (13) is also provided with a through groove (3), the chamfering blade is located in the through groove (3), and a closing mechanism (6) is also provided in the chamfering portion (13), the closing mechanism (6) comprising a closing frame (61) and a linkage assembly (62), the closing frame (61) being slidably connected to the inner wall of the through groove (3), and the driving frame (52) drives the closing frame (61) to slide through the linkage assembly (62), thereby closing the through groove (3).

10. A processing drill bit for easy chip breaking according to claim 9, characterized in that: The linkage assembly (62) comprises an active frame (621) and a driven frame (622), wherein the active frame (621) is connected to the chamfering scraper (4), and the driven frame (622) is connected to the closed frame (61), the active frame (621) is provided with a linkage portion (6211), and the closed frame (61) is provided with a linkage groove (6221), the length direction of the linkage groove (6221) is inclined to the sliding direction of the chamfering scraper (4), and the linkage portion (6211) extends into the linkage groove (6221) and abuts against the inner wall of the linkage groove (6221).

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