Quick combined type stepped drill

Abstract

The utility model discloses a quick combined step drill, which belongs to the drill bit technology and comprises a connecting shaft and a drill bit mechanism, a connecting seat is inserted into the lower end of the connecting shaft, inclined planes are arranged on two sides of the connecting seat, two positioning bolts are in threaded connection with the inside of the connecting shaft, and the other ends of the positioning bolts penetrate to the outside of the connecting seat. The drill bit mechanism is fixedly connected to the lower end of the connecting seat; the drill bit mechanism comprises a guide-in assembly fixedly connected to the lower end of the connecting base. In the using process of the device, the multiple cutting teeth form the effect of sequentially cutting machined parts in the machining process through the arranged cutting assembly and the step-by-step decreasing thickness of the multiple cutting teeth, the machining efficiency is improved, and when a drill bit part rotates rapidly, the machining efficiency is improved. By means of the device, cooling liquid can be guided out in the machining process, the operation of stopping rotation machining of the drill bit part and supplementing the cooling liquid is reduced, and the machining efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to drill bit technology, specifically to a rapid combination step drill. Background Technology

[0002] Step drills, also known as step drills or pagoda drills, can be classified into three types based on the groove shape: straight groove, spiral groove, and arc groove. Based on the number of cutting edges, they can be classified into single-edge, double-edge, three-edge, four-edge, and multi-edge step drills. They are mainly used for drilling thin steel plates within 3mm. One drill bit can replace multiple drill bits. They can process holes of different diameters as needed, and can complete the processing of large holes in one go without changing drill bits or drilling positioning holes.

[0003] Currently, solid step drills are manufactured using fully ground CBN, primarily made of high-speed steel and cemented carbide. They require high machining precision and can be surface-coated to extend tool life and enhance durability, depending on the machining requirements. These products are suitable for industries such as automotive machining, aerospace, sheet metal processing, and electrical installation and repair. They are also portable and can be used in conjunction with tools like electric drills for high-altitude operations.

[0004] According to the prior art, "a cemented carbide combined stepped drill bit" with the publication number "CN216811576U" has multiple annular grooves on the outer side of the prism. The prism is fixed by inserting blocks into the annular grooves, which facilitates the installation of the drill bit body, improves the efficiency of replacing and installing the drill bit, and enhances its practicality.

[0005] However, during the use of this device, the drilling process will generate excessive heat, which will affect the material of the workpiece. Generally, during use, the processing area will be replenished with coolant intermittently to reduce the overheating temperature and prevent damage to the workpiece. The need to replenish coolant intermittently will affect the processing efficiency.

[0006] Based on this, the present invention designs a rapid assembly step drill to solve the above problems. Utility Model Content

[0007] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a rapid combination step drill.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A quick-assembly step drill includes a connecting shaft, a connecting seat inserted into the lower end of the connecting shaft, inclined surfaces on both sides of the connecting seat, two locating bolts internally threaded into the connecting shaft, the other ends of the locating bolts extending to the outside of the connecting seat, and a drill bit mechanism fixedly connected to the lower end of the connecting seat. The drill bit mechanism includes an inlet assembly fixedly connected to the lower end of the connecting seat, a cutting assembly fixedly connected to the outside of the inlet assembly, and the surface of the cutting assembly extending below the inlet assembly.

[0010] Furthermore, the cutting assembly includes a drill bit fixedly connected to the lower end of the inlet assembly. The lower end of the drill bit has an angled arc surface. The surface of the drill bit has two side grooves. The two side grooves are centrally symmetrically distributed along the axis of the connecting shaft. Multiple cutting teeth are fixedly connected to the surface of the angled arc. The drill bit has an internal fluid storage cavity.

[0011] Furthermore, it includes an inlet block fixedly connected inside the drill bit assembly, with a connecting block fixedly connected to the upper end of the inlet block, the connecting block fixedly connected to the lower end of the connecting seat, and an inner cavity opened inside the inlet block, the upper end of the inner cavity extending into the interior of the connecting block, and the lower end of the inner cavity penetrating to the outside of the inlet block and communicating with the inner liquid storage cavity.

[0012] Furthermore, the plurality of cutting teeth are evenly distributed in an arc shape along the inclined surface, and the thickness of the plurality of cutting teeth decreases sequentially from one side groove to another.

[0013] Furthermore, the connecting block has multiple feed ports inside, which are connected to the inner cavity, and the multiple cutting teeth are evenly distributed in a ring shape along the surface of the connecting block;

[0014] Furthermore, the vertical inner wall of the side groove is provided with a plurality of capillary grooves, which are distributed in a straight line along the inclined inner wall of the side groove.

[0015] Furthermore, a plurality of actuating plates are fixedly connected to the inner wall of the inner liquid storage cavity, and the plurality of actuating plates are evenly distributed along the inner wall of the inner liquid storage cavity.

[0016] Furthermore, the inner wall of the drill bit is provided with multiple outlets, one end of which is connected to the inner liquid storage chamber, and the outlets are located between adjacent actuating plates.

[0017] Furthermore, the drill bit component has a flow channel inside, the other end of the outlet is connected to the adjacent flow channel, and the other end of the flow channel is connected to the adjacent side groove;

[0018] Furthermore, the surface of the connecting block and the inner wall of the drill bit combine to form an annular groove, and the other end of the feed port is connected to the annular groove;

[0019] Beneficial effects

[0020] During operation, this device, through its cutting components and the progressively decreasing thickness of multiple cutting teeth, achieves the effect of sequentially cutting the workpiece, thus improving processing efficiency. Furthermore, when the drill bit rotates rapidly, the device can discharge coolant during processing, reducing the need to stop the drill bit to replenish coolant and ensuring processing efficiency.

[0021] This device uses an inlet component to guide coolant into the cutting assembly, preventing backflow of coolant through the inlet block as it moves through the guide outlet. This also reduces coolant backflow and overflow during the rotation of the cutting assembly, allowing the cutting assembly to perform rapid machining of the machined holes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional view of the main structure of a rapid assembly step drill according to the present invention;

[0024] Figure 2 This is a schematic diagram of a rapid assembly stepped drill bit mechanism according to the present invention;

[0025] Figure 3 This is a quick-assembly stepped drill cross-sectional view of the present invention;

[0026] Figure 4 This is a schematic diagram of a quick-assembly stepped drill angle opening method according to the present invention;

[0027] Figure 5 This is a schematic diagram of the distribution of cutting teeth in a rapid assembly stepped drill according to the present invention;

[0028] Figure 6 This is a schematic diagram of the distribution of a quick-assembly stepped drill actuating plate according to the present invention;

[0029] Figure 7 This is a cross-sectional view of a quick-assembly stepped drill inlet assembly according to the present invention.

[0030] The labels in the diagram represent:

[0031] 1. Connecting shaft; 2. Connecting seat; 21. Positioning bolt; 3. Drill bit mechanism; 31. Cutting assembly; 311. Drill bit; 312. Bevel; 313. Side groove; 314. Cutting teeth; 315. Inner liquid storage chamber; 316. Outlet; 317. Actuating plate; 318. Flow channel; 319. Capillary groove; 32. Inlet assembly; 321. Inlet block; 322. Connecting block; 323. Inner cavity; 324. Feed inlet; 325. Annular groove. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] The present invention will be further described below with reference to the embodiments.

[0034] In some embodiments, please refer to the appendix to the instruction manual. Figure 1-7 A quick-assembly step drill includes a connecting shaft 1, a connecting seat 2 inserted into the lower end of the connecting shaft 1, inclined surfaces on both sides of the connecting seat 2, two positioning bolts 21 internally threaded to the connecting shaft 1, the other end of the positioning bolts 21 extending to the outside of the connecting seat 2, and a drill bit mechanism 3 fixedly connected to the lower end of the connecting seat 2; wherein, the drill bit mechanism 3 includes an inlet assembly 32 fixedly connected to the lower end of the connecting seat 2, a cutting assembly 31 fixedly connected to the outside of the inlet assembly 32, and the surface of the cutting assembly 31 extending to the lower part of the inlet assembly 32;

[0035] In this embodiment of the invention, the device can introduce coolant into the cutting assembly 31 through the inlet component 32, and reduce the occurrence of coolant backflow and overflow during the rotation of the cutting assembly 31. The cutting assembly 31 can perform rapid machining of the machined hole. The progressively decreasing thickness of the multiple cutting teeth 314 improves the machining efficiency. Furthermore, when the drill bit 311 rotates rapidly, the device can export the coolant during the machining process, ensuring machining efficiency.

[0036] In some embodiments, such as Figures 1-7As shown, in a preferred embodiment of this utility model, the cutting assembly 31 includes a drill bit 311 fixedly connected to the lower end of the inlet assembly 32. The lower end of the drill bit 311 has an angled surface 312. Two side grooves 313 are formed on the surface of the drill bit 311, and the two side grooves 313 are centrally symmetrically distributed along the axis of the connecting shaft 1. Multiple cutting teeth 314 are fixedly connected to the surface of the angled surface 312. An inner fluid storage cavity 315 is formed inside the drill bit 311. The multiple cutting teeth 314 are evenly distributed in an arc shape along the surface of the angled surface 312, and the thickness of the multiple cutting teeth 314 decreases sequentially from one side groove 313 to the other side groove 313. Multiple capillary grooves 319 are formed on the vertical inner wall of the side groove 313, and the multiple capillary grooves 319 are distributed in a straight line along the inclined inner wall of the side groove 313; multiple actuating plates 317 are fixedly connected to the inner wall of the inner liquid storage cavity 315, and the multiple actuating plates 317 are evenly distributed along the inner wall of the inner liquid storage cavity 315; multiple outlets 316 are formed on the inner wall of the drill bit 311, one end of the outlet 316 is connected to the inner liquid storage cavity 315, and the outlet 316 is located between adjacent actuating plates 317; a flow channel 318 is formed inside the drill bit 311, the other end of the outlet 316 is connected to the adjacent flow channel 318, and the other end of the flow channel 318 is connected to the adjacent side groove 313;

[0037] In this embodiment of the invention, the device features a plurality of cutting teeth 314 with progressively decreasing thickness. This allows the coolant to flow into the flow channel 318 through the outlet 316 when the connecting shaft 1 rotates. Furthermore, filamentous materials such as cotton wool can be placed at the end of the flow channel 318 near the side groove 313 to ensure more uniform coolant flow. The coolant then flows through the capillary groove 319 towards the adjacent oblique angle 312. At this point, the coolant will wet the cutting surface under the action of centrifugal force in conjunction with the contact cutting surface, facilitating subsequent cutting processing.

[0038] In this embodiment of the utility model, multiple cutting teeth 314 form a rapid drilling effect on the rotating hole. The longitudinal section of the inner liquid storage cavity 315 forms an isosceles trapezoid that is wider at the top and narrower at the bottom. When the connecting shaft 1 rotates, the coolant inside the inner liquid storage cavity 315 is driven to rotate rapidly under the action of the actuating plate 317. At this time, the coolant inside the inner liquid storage cavity 315 follows the rapid rotation. Since the inner liquid storage cavity 315 is set to move closer to the guide outlet 316 when the coolant follows the rotation, the coolant moves closer to the guide outlet 316.

[0039] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7As shown, in a preferred embodiment of this utility model, it includes an inlet block 321 fixedly connected to the inside of the drill bit 311. A connecting block 322 is fixedly connected to the upper end of the inlet block 321. The connecting block 322 is fixedly connected to the lower end of the connecting seat 2. An inner cavity 323 is formed inside the inlet block 321. The upper end of the inner cavity 323 extends into the inside of the connecting block 322, and the lower end of the inner cavity 323 penetrates to the outside of the inlet block 321 and communicates with the inner liquid storage cavity 315. A plurality of feed ports 324 are formed inside the connecting block 322. The feed ports 324 communicate with the inner cavity 323. A plurality of cutting teeth 314 are evenly distributed in a ring shape along the surface of the connecting block 322. The surface of the connecting block 322 and the inner wall of the drill bit 311 combine to form an annular groove 325. The other end of the feed port 324 communicates with the annular groove 325.

[0040] In this embodiment of the invention, during use, coolant is poured into the annular groove 325 and enters the inner cavity 323 through the inlet 324. The teardrop-shaped protrusion formed at the lower end of the guide block 321 acts as a guide, allowing the liquid to enter the inner storage cavity 315. The multiple inlets 324 prevent obstruction of the liquid flow.

[0041] In this embodiment of the present invention, when the drill bit 311 rotates, the liquid approaches the outlet 316 under the action of centrifugal force. At this time, since the lower end of the guide block 321 is teardrop-shaped and located at the center of rotation, the coolant will not flow backward through the guide block 321 during the process of moving towards the guide outlet 316.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A quick-assembly step drill, comprising: a connecting shaft (1), wherein a connecting seat (2) is inserted into the lower end of the connecting shaft (1), both sides of the connecting seat (2) are provided with inclined surfaces, and two positioning bolts (21) are internally threaded into the connecting shaft (1), the other end of the positioning bolts (21) extending to the outside of the connecting seat (2), characterized in that: Drill bit mechanism (3), which is fixedly connected to the lower end of the connecting seat (2); The drill bit mechanism (3) includes an inlet assembly (32) fixedly connected to the lower end of the connecting seat (2), and a cutting assembly (31) is fixedly connected to the outside of the inlet assembly (32), with the surface of the cutting assembly (31) extending to the bottom of the inlet assembly (32).

2. The rapid assembly step drill according to claim 1, characterized in that, The cutting assembly (31) includes a drill bit (311) fixedly connected to the lower end of the inlet assembly (32). The lower end of the drill bit (311) has an angled surface (312). The surface of the drill bit (311) has two side grooves (313). The two side grooves (313) are centrally symmetrically distributed along the axis of the connecting shaft (1). The surface of the angled surface (312) is fixedly connected with a plurality of cutting teeth (314). The drill bit (311) has an internal fluid storage cavity (315).

3. The rapid assembly step drill according to claim 2, characterized in that, The inlet assembly (32) includes an inlet block (321) fixedly connected inside the drill bit assembly (311). A connecting block (322) is fixedly connected to the upper end of the inlet block (321). The connecting block (322) is fixedly connected to the lower end of the connecting seat (2). An inner cavity (323) is opened inside the inlet block (321). The upper end of the inner cavity (323) extends into the interior of the connecting block (322). The lower end of the inner cavity (323) penetrates into the exterior of the inlet block (321) and communicates with the inner liquid storage cavity (315).

4. The rapid assembly step drill according to claim 2, characterized in that, The plurality of cutting teeth (314) are evenly distributed in an arc shape along the surface of the chamfer (312), and the thickness of the plurality of cutting teeth (314) decreases sequentially from one side groove (313) to another side groove (313).

5. The rapid assembly step drill according to claim 3, characterized in that, The connecting block (322) has multiple feed ports (324) inside, which are connected to the inner cavity (323). The multiple cutting teeth (314) are evenly distributed in a ring along the surface of the connecting block (322).

6. The rapid assembly step drill according to claim 4, characterized in that, The vertical inner wall of the side groove (313) is provided with a plurality of capillary grooves (319), and the plurality of capillary grooves (319) are distributed in a straight line along the inclined inner wall of the side groove (313).

7. The rapid assembly step drill according to claim 6, characterized in that, The inner wall of the inner liquid storage cavity (315) is fixedly connected with a plurality of actuating plates (317), and the plurality of actuating plates (317) are evenly distributed along the inner wall of the inner liquid storage cavity (315).

8. The rapid assembly step drill according to claim 7, characterized in that, The inner wall of the drill bit (311) is provided with a plurality of outlets (316), one end of the outlet (316) is connected to the inner liquid storage cavity (315), and the outlet (316) is located between adjacent actuating plates (317).

9. The rapid assembly step drill according to claim 8, characterized in that, The drill bit (311) has a flow channel (318) inside, the other end of the outlet (316) is connected to the adjacent flow channel (318), and the other end of the flow channel (318) is connected to the adjacent side groove (313).

10. The rapid assembly step drill according to claim 5, characterized in that, The surface of the connecting block (322) and the inner wall of the drill bit (311) combine to form an annular groove (325), and the other end of the feed port (324) is connected to the annular groove (325).

Images