A shaped drill bit for machining thin-walled parts

Abstract

This utility model relates to the field of parts processing technology and discloses a forming drill bit for processing thin-walled parts, including a drill bit body and a mounting part; two symmetrically distributed locking pins are fixedly connected to the circumferential side wall of the drill bit body; a guide groove corresponding to the two locking pins is opened at one end of the mounting part near the drill bit body, and a sliding groove is opened inside the mounting part, which is connected to the guide groove; two slots corresponding to the locking pins are also opened inside the mounting part, which are connected to the sliding groove, and the sliding groove is fan-shaped; a pressing structure is fixedly connected to the inner wall of the mounting part, and a pressing component is rotatably connected to the inner cavity of the mounting part. When installing this utility model, only three steps are required to complete the fixing: "insertion positioning → rotation locking → rotation knob locking". When disassembling, it can be separated by "reverse rotation of the knob → spring reset → rotation withdrawal", without the cumbersome steps of inserting and removing pins.

Description

Technical Field

[0001] This utility model relates to the field of parts processing technology, specifically a forming drill bit for processing thin-walled parts. Background Technology

[0002] Shaped drills are a special type of drill bit. Compared to ordinary cylindrical drill bits, shaped drill bits can form holes of a specific shape. These drill bits are typically used in projects with specific requirements to ensure that the surface and shape of the hole meet design requirements. Depending on the design application, shaped drill bits can be divided into several types, the most common including countersinking drills, tapping drills, countersinking flat drills, shaped cutting tools, cam-groove countersinking drills, and starting taper drills. Chinese Patent Publication No. (CN213560084U) discloses a high-efficiency one-piece forming drill bit, relating to the field of deep hole machining. Addressing the problem of inconvenient assembly and disassembly of existing deep hole machining drill bits, leading to low drilling efficiency, the following solution is proposed: It includes a drill bit body and a mounting component. The mounting component has an mounting groove on its side near the drill bit body, and two slots are centrally symmetrically distributed about the center point of the mounting component inside the mounting component, communicating with the mounting groove. A first movable groove and a second movable groove are symmetrically distributed on both sides of the slots inside the mounting component, and both the first and second movable grooves communicate with the slots. Two clamping plates and two connecting plates centrally symmetrically distributed about their center lines are fixedly connected to the circumferential sidewall of the drill bit body. The aforementioned comparative documents mainly use the insertion or removal of pins to fix or disassemble the drill bit body. Although this method can ensure the stability of the drill bit, it has certain shortcomings in practical applications. The main problem is that the operation process is relatively cumbersome, requiring alignment of the pin hole and insertion of the pin, which increases the operation time and reduces work efficiency. In view of this, the present invention solves the above-mentioned technical problems by proposing a forming drill bit for machining thin-walled parts. Utility Model Content

[0003] To address the shortcomings of the aforementioned background technology, this utility model provides a technical solution for a forming drill bit used in the machining of thin-walled parts. Installation requires only three steps: "insertion and positioning → rotation to engage → rotation of the knob to lock." Disassembly is achieved by "reverse rotation of the knob → spring reset → rotation to remove," eliminating the cumbersome steps of inserting and removing pins. Compared to the "aligning the pin hole → inserting the pin" operation in the prior art, this utility model offers a simpler operation process, significantly reducing the time required for a single assembly and disassembly, and effectively improving the overall progress of deep hole machining.

[0004] This utility model provides the following technical solution: a forming drill bit for processing thin-walled parts, comprising a drill bit body and a mounting component; The circumferential sidewall of the drill bit body is fixedly connected to two symmetrically distributed locking pins; The mounting component has a guide groove at one end near the drill bit body that corresponds to the two locking pins. The mounting component has a sliding groove inside, and the sliding groove is connected to the guide groove. The mounting component also has two slots inside that correspond to the locking pins and are connected to the sliding groove. The sliding groove is fan-shaped. The inner wall of the mounting component is fixedly connected to a pressing structure, and the inner cavity of the mounting component is rotatably connected to a pressing assembly.

[0005] As a preferred embodiment of this utility model, the pressing structure includes a compression spring fixedly connected to the inner wall of the mounting component. One end of the compression spring is fixedly connected to a pressing plate. The outer diameter of the pressing plate is adapted to the inner diameter of the mounting component, and the pressing plate slides against the inner wall of the mounting component.

[0006] As a preferred embodiment of the present invention, the extrusion assembly includes two rotating shafts rotatably connected to the inner cavity of the mounting component. The two rotating shafts are symmetrically distributed along the center line of the mounting component. One end of each rotating shaft is fixedly connected to an extrusion wheel, and the other end of the rotating shaft extends to the outside of the mounting component and is fixedly connected to a knob. The inner cavity of the extrusion wheel is provided with a limit structure.

[0007] As a preferred technical solution of this utility model, the limiting structure includes a limiting groove opened at one end of the extrusion wheel, a guide post is slidably connected to the inner cavity of the limiting groove, and the guide post is slidably engaged with the inner wall of the limiting groove. A limiting block is fixedly connected to one end of the guide post, and a reset spring is provided between the guide post and the inner wall of the limiting groove. A groove is opened at one end of the lower pressure plate facing the limiting block.

[0008] As a preferred technical solution of this utility model, the extrusion wheel is a cam structure, and its protruding end is used to extrude the lower pressure plate. The circumferential side wall of the knob is provided with anti-slip texture, and the anti-slip texture has a concave structure.

[0009] As a preferred technical solution of this utility model, both the limiting block and the groove are hemispherical structures, and the positions of the limiting block and the groove are corresponding and their sizes are compatible.

[0010] As a preferred embodiment of this utility model, the surface of the mounting component is provided with a plurality of reserved holes, which are distributed in a ring array.

[0011] As a preferred embodiment of this utility model, the mounting component is an alloy steel mounting component, and its inner wall is provided with a wear-resistant coating.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model only requires three steps to fix during installation: "insert positioning → rotate to lock → turn the knob to lock". During disassembly, it can be separated by "reverse rotation of the knob → spring reset → rotation to remove". There are no cumbersome steps of inserting and removing pins. Compared with the operation of "aligning the pin hole → inserting the pin" in the prior art, the operation process of this utility model is simpler, the disassembly and assembly time is greatly shortened, and the overall progress of deep hole processing is effectively improved.

[0013] 2. The locking post of this utility model is guided into the slot by a fan-shaped sliding groove, and works with the extrusion wheel (cam structure) to extrude the lower pressure plate to achieve dual fixation of mechanical limit and elastic clamping; at the same time, the hemispherical matching structure of the limit block and the groove can prevent the extrusion wheel from loosening due to processing vibration, ensuring the stability of the drill bit when processing thin-walled parts at high speed, and avoiding processing accuracy deviation caused by unstable fixation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a partially enlarged view of the present invention; Figure 4 This is a schematic diagram of the sliding groove structure of this utility model; Figure 5 This is a schematic diagram of the guide groove structure of this utility model; Figure 6 This is a schematic diagram of the drill bit body structure of this utility model.

[0015] In the diagram: 1. Drill bit body; 101. Mounting component; 2. Locking pin; 3. Guide groove; 301. Sliding groove; 302. Slot; 4. Compression spring; 401. Lower pressure plate; 5. Rotating shaft; 501. Extrusion wheel; 502. Knob; 6. Limiting groove; 601. Guide pin; 602. Limiting block; 603. Return spring; 604. Groove; 7. Reserved hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6 As shown, a forming drill bit for machining thin-walled parts includes a drill bit body 1 and a mounting part 101; Two symmetrically distributed locking pins 2 are fixedly connected to the circumferential sidewall of the drill bit body 1; The mounting component 101 has a guide groove 3 at one end near the drill bit body 1 that corresponds to the two locking pins 2. The mounting component 101 has a sliding groove 301 inside, and the sliding groove 301 is connected to the guide groove 3. The mounting component 101 also has two slots 302 inside that correspond to the locking pins 2. The slots 302 are connected to the sliding grooves 301. The sliding grooves 301 are fan-shaped. The inner wall of the mounting component 101 is fixedly connected to a pressing structure, and the inner cavity of the mounting component 101 is rotatably connected to a pressing assembly. The pressing structure includes a compression spring 4 fixedly connected to the inner wall of the mounting component 101. One end of the compression spring 4 is fixedly connected to a pressing plate 401. The outer diameter of the pressing plate 401 is adapted to the inner diameter of the mounting component 101, and the pressing plate 401 slides in contact with the inner wall of the mounting component 101. The extrusion assembly includes two rotating shafts 5 rotatably connected to the inner cavity of the mounting member 101. The two rotating shafts 5 are symmetrically distributed along the center line of the mounting member 101. One end of each rotating shaft 5 is fixedly connected to an extrusion wheel 501, and the other end of the rotating shaft 5 extends to the outside of the mounting member 101 and is fixedly connected to a knob 502. The inner cavity of the extrusion wheel 501 is provided with a limit structure. The limiting structure includes a limiting groove 6 opened at one end of the extrusion roller 501. A guide post 601 is slidably connected to the inner cavity of the limiting groove 6, and the guide post 601 is slidably engaged with the inner wall of the limiting groove 6. A limiting block 602 is fixedly connected to one end of the guide post 601. A reset spring 603 is provided between the guide post 601 and the inner wall of the limiting groove 6. A groove 604 is opened at one end of the lower pressure plate 401 facing the limiting block 602. The extrusion roller 501 has a cam structure, and its protruding end is used to extrude the lower pressure plate 401. The circumferential side wall of the knob 502 is provided with anti-slip texture, and the anti-slip texture has a concave structure. Both the limiting block 602 and the groove 604 are hemispherical structures, and the positions of the limiting block 602 and the groove 604 are corresponding and their sizes are compatible. The surface of the mounting component 101 is provided with a plurality of reserved holes 7, which are arranged in a ring array. Mounting component 101 is made of alloy steel and has a wear-resistant coating on its inner wall.

[0018] Installation and fixing process Preliminary positioning and insertion: Align the two locking pins 2 of the drill bit body 1 with the guide groove 3 at the end of the mounting part 101, and push the drill bit body 1 into the mounting part 101 along the guide groove 3. At this time, the end of the drill bit body 1 will contact the lower pressure plate 401 and push the lower pressure plate 401 to compress the compression spring 4 (the compression spring 4 stores energy to provide a restoring force for subsequent disassembly).

[0019] Rotate and engage the locking pin in slot 302: After the locking pin 2 is fully engaged in the mounting part 101, rotate the drill bit body 1 to move the locking pin 2 along the sliding groove 301 of the fan-shaped structure (the fan-shaped design of the sliding groove 301 provides rotational guidance for the locking pin 2) until the locking pin 2 is engaged in the slot 302 that is connected to the sliding groove 301, thus completing the initial mechanical limiting.

[0020] Extrusion assembly locking: Rotate the knob 502 on the outside of the mounting part 101 to drive the rotating shaft 5 and the extrusion wheel 501 (cam structure) to rotate synchronously. As the extrusion wheel 501 rotates, its protruding end gradually extrudes the lower pressure plate 401, causing the lower pressure plate 401 to move towards the locking post 2, thus pressing down the lower pressure plate 401 and pressing the lower pressure plate 401 against the drill bit body 1.

[0021] Anti-loosening limit structure: During the process of the extrusion roller 501 extruding the lower pressure plate 401, the limit structure works synchronously: the groove 604 on the surface of the lower pressure plate 401 moves with it. When the extrusion roller 501 rotates to the preset locking position, the reset spring 603 in the limit groove 6 pushes the guide post 601 and the limit block 602 (hemispherical) to pop out, so that the limit block 602 is locked into the groove 604 of the lower pressure plate 401 (the hemispherical structure is adapted to ensure stable locking), thereby fixing the angle of the extrusion roller 501 and preventing it from rotating on its own due to external forces such as vibration, further ensuring the pressing state of the locking post 2.

[0022] Disassembly and separation process Release the limit lock: Rotate the knob 502 in the opposite direction to drive the extrusion wheel 501 to rotate in the opposite direction. Its protruding end gradually separates from the lower pressure plate 401. At this time, the extrusion of the lower pressure plate 401 on the limit block 602 disappears. Under the action of the arc surface of the groove 604, the limit block 602 compresses the reset spring 603 and retracts into the limit groove 6 with the guide post 601, thus releasing the angle lock on the extrusion wheel 501.

[0023] Lower pressure plate 401 resets: After the pressure roller 501 releases its pressure on the lower pressure plate 401, the compressed spring 4 releases its elasticity, pushing the lower pressure plate 401 to reset away from the slot 302, and the pressing state between the locking pin 2 and the inner wall of the slot 302 is relaxed.

[0024] Rotate to remove: Rotate the drill bit body 1 so that the locking pin 2 moves back from the slot 302 to the guide slot 3 along the fan-shaped sliding groove 301. At this time, the locking pin 2 is aligned with the guide slot 3. Pull the drill bit body 1 outward to complete the disassembly.

[0025] Key structural auxiliary role The cam structure of the extrusion roller 501 achieves "pressing / releasing" switching through rotation, and the concave anti-slip texture of the knob 502 enhances the ease of operation; The wear-resistant coating on the inner wall of the mounting component 101 reduces sliding wear between the lower pressure plate 401 and the mounting component 101, thus extending its service life. The reserved hole 7 can be used to fix the mounting part 101 to external equipment (such as drive motor), adapting to different processing scenarios.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover 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. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A profiled drill bit for machining of thin-walled pieces, comprising: Drill bit body (1) and mounting component (101); The feature is that: the circumferential sidewall of the drill bit body (1) is fixedly connected with two symmetrically distributed locking pins (2); The mounting component (101) has a guide groove (3) at one end near the drill bit body (1) that corresponds to the two locking pins (2). The mounting component (101) has a sliding groove (301) inside, and the sliding groove (301) is connected to the guide groove (3). The mounting component (101) also has two slots (302) inside that correspond to the locking pins (2). The slots (302) are connected to the sliding grooves (301). The sliding grooves (301) are fan-shaped. The inner wall of the mounting component (101) is fixedly connected to a pressing structure, and the inner cavity of the mounting component (101) is rotatably connected to a pressing assembly.

2. The shaped drill bit for machining thin-walled parts according to claim 1, characterized in that: The pressing structure includes a compression spring (4) fixedly connected to the inner wall of the mounting component (101). One end of the compression spring (4) is fixedly connected to a pressing plate (401). The outer diameter of the pressing plate (401) is adapted to the inner diameter of the mounting component (101), and the pressing plate (401) slides with the inner wall of the mounting component (101).

3. The shaped drill bit for machining thin-walled parts according to claim 2, characterized in that: The extrusion assembly includes two rotating shafts (5) rotatably connected to the inner cavity of the mounting component (101). The two rotating shafts (5) are symmetrically distributed along the center line of the mounting component (101). One end of each rotating shaft (5) is fixedly connected to an extrusion wheel (501), and the other end of the rotating shaft (5) extends to the outside of the mounting component (101) and is fixedly connected to a knob (502). The inner cavity of the extrusion wheel (501) is provided with a limit structure.

4. The shaped drill bit for machining thin-walled parts according to claim 3, characterized in that: The limiting structure includes a limiting groove (6) opened at one end of the extrusion wheel (501), a guide post (601) is slidably connected to the inner cavity of the limiting groove (6), and the guide post (601) is slidably engaged with the inner wall of the limiting groove (6). A limiting block (602) is fixedly connected to one end of the guide post (601), and a reset spring (603) is provided between the guide post (601) and the inner wall of the limiting groove (6). A groove (604) is opened at one end of the lower pressure plate (401) facing the limiting block (602).

5. The shaped drill bit for machining thin-walled parts according to claim 4, characterized in that: The extrusion wheel (501) has a cam structure, and its protruding end is used to extrude the lower pressure plate (401). The circumferential sidewall of the knob (502) is provided with anti-slip texture, and the anti-slip texture has a concave structure.

6. The shaped drill bit for machining thin-walled parts according to claim 5, characterized in that: The limiting block (602) and the groove (604) are both hemispherical structures, and the positions of the limiting block (602) and the groove (604) correspond and their sizes are compatible.

7. The shaped drill bit for machining thin-walled parts according to claim 6, characterized in that: The surface of the mounting component (101) is provided with a plurality of reserved holes (7), which are arranged in a ring array.

8. The shaped drill bit for machining thin-walled parts according to claim 7, characterized in that: The mounting component (101) is an alloy steel mounting component, and its inner wall is provided with a wear-resistant coating.

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