Dimple drill with replaceable guide column

Abstract

The utility model belongs to the technical field of drill bits, particularly relates to a dimple drill with a replaceable guide post, and aims to solve the problems that the existing guide post is protected by arranging a wear-resistant part, the guide post is fixedly connected with a cutter body, the cutter body is not protected, the service life of the cutter body is often longer than that of the guide post, and the service life of the cutter body is not longer than that of the guide post. In order to solve the problems that in the prior art, if a guide column and a cutter body are replaced together, the utilization rate of the cutter body is low, and the cost is increased, according to the scheme, the drill bit is in threaded connection with the guide column, when the drill bit moves towards the guide column, a clamping block is pressed, a reset spring is compressed through pressure, and the clamping block is shrunk into a clamping groove; the tool is convenient to disassemble, assemble and replace at will, and the problems that due to the fact that the tool body is not protected, the service life of the tool body is often longer than that of the guide column, if the guide column and the tool body are replaced together, the utilization rate of the tool body is low, and cost is increased are solved.

Description

Technical Field

[0001] The utility model relates to a countersink drill, in particular to a countersink drill with a replaceable guide column, belonging to the technical field of drill bits. Background Art

[0002] Countersink is a countersink drill. It is also called a chamfering cutter, chamfering drill, scoring drill, chamfering tool, a drill used to countersink conical countersunk holes. It can be used to deburr, chamfer, and dig countersunk holes at the hole mouth. The premise is that there must be a guide hole before subsequent processing. The taper conical hole is larger at the top and smaller at the bottom. To place a tapered flat head screw, it is necessary to process a countersunk hole and a tapered hole. Trimming and deburring the hole mouth is to lightly trim the edge of the hole mouth. Remove the edges and corners of the hole mouth.

[0003] In the prior art, a new type of countersink drill disclosed in the announcement number CN214108936U includes a guide post, a cutter body and a shank, wherein the guide post and the shank are located at both ends of the cutter body, and the end face of the guide post is detachably provided with at least one wear-resistant part arranged along the axial direction of the guide post, and also includes a fixing part for fixing the wear-resistant part on the end face of the guide post, wherein the fixing part is provided with an external thread, and the end face of the guide post is provided with a threaded hole matching the external thread. When the countersink drill processes a workpiece, the wear-resistant part contacts the workpiece, avoiding direct contact between the guide post and the workpiece, reducing friction between the guide post and the workpiece during processing, ensuring the processing accuracy of the workpiece, improving the shape accuracy and surface quality of the countersink part, and avoiding wear of the guide post.

[0004] In the above technical solution, the guide post is protected by arranging a wear-resistant part, and the guide post is fixedly connected to the cutter body without being protected. The life of the cutter body is often longer than that of the guide post. If the guide post and the cutter body are replaced together, the utilization rate of the cutter body will be low, resulting in increased costs. In view of this, a countersink drill with a replaceable guide post is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model provides a countersink drill with a replaceable guide post to solve the problem that the guide post is protected by arranging a wear-resistant part, the guide post is fixedly connected to a cutter body, and the cutter body is not protected. The life of the cutter body is often longer than that of the guide post. If the guide post and the cutter body are replaced together, the utilization rate of the cutter body is low, resulting in increased costs.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a countersink drill with a replaceable guide column, comprising a drill bit, a thread groove is provided at the bottom end of the surface of the drill bit, and four clamping blocks are arranged on the surface of the drill bit;

[0007] A card slot is provided inside the card connection block, a fixed block is fixedly connected inside the card slot, and a spring block is fixedly connected to one side of the fixed block;

[0008] A return spring is arranged on the outer side of the spring block, and the return spring is fixedly connected to the clamping block. A guide column is threadedly connected to the bottom end of the drill bit, and four clamping grooves are arranged on the upper surface of the guide column.

[0009] As a further solution of the utility model: the sizes of the clamping block and the clamping groove are matched, and a chip removal groove is provided on the surface of the guide column.

[0010] As a further solution of the utility model: a clamping block is fixedly connected to the bottom end surface of the guide column, and a clamping seat is arranged on the outer side of the clamping block.

[0011] As a further solution of the utility model: a fixing bolt is threadedly connected to the left side of the clamping seat, a bearing is connected to one side of the fixing bolt, and a left clamping plate is fixedly connected to one side of the bearing.

[0012] As a further solution of the utility model: screws are provided on both sides of the fixing bolt, a shock-absorbing pad is fixedly connected inside the clamping seat, a fixed clamping plate is fixedly connected to one side of the shock-absorbing pad, and a rubber pad is fixedly connected to one side of the fixed clamping plate.

[0013] As a further solution of the utility model: the bottom end surface of the clamping seat is fixedly connected with a threaded block, the outer side of the threaded block is threadedly connected with a fixing seat, the top end surface of the fixing seat is provided with a limiting seat, and the surface of the limiting seat is threadedly connected with a fixing screw.

[0014] As a further solution of the utility model: the bottom end surface of the fixing seat is fixedly connected to the handle, the surface of the handle is fixedly connected to a heat sink, the bottom end of the handle is fixedly connected to a connecting block, and a fixing screw passes through the interior of the limiting seat and is threadedly connected to the handle.

[0015] The beneficial effects of the utility model are:

[0016] 1. By connecting the drill bit to the guide column threadedly, the drill bit moves toward the guide column while pressing the clamping block. The reset spring is compressed by pressure, and the clamping block is retracted into the clamping groove until it reaches the clamping groove opened on the surface of the guide column for clamping. This facilitates easy disassembly and replacement, and avoids the problem that the life of the cutter body is often longer than that of the guide column due to the lack of protective treatment on the cutter body. If the guide column and the cutter body are replaced together, the utilization rate of the cutter body will be low, resulting in increased costs.

[0017] 2. Turn the fixing bolts and screws on the left side of the clamping seat to drive the left clamping plate to move toward the fixed clamping plate and clamp the clamping block, thereby completing the assembly between the guide column and the clamping seat, making it easier to replace the guide column when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the split structure of the drill bit and the guide column of the utility model;

[0020] Figure 3 This is a schematic diagram of the disassembly structure of the device of the utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the clamping seat of the utility model.

[0022] In the figure: 1. drill bit; 2. guide column; 3. chip groove; 4. clamping seat; 5. limit seat; 6. handle; 7. heat sink; 8. connecting block; 9. fixing bolt; 10. screw; 11. clamping block; 12. threaded groove; 13. clamping groove; 14. clamping block; 15. fixing screw; 16. fixing seat; 17. threaded block; 18. bearing; 19. left clamping plate; 20. fixed clamping plate; 21. rubber pad; 22. shock-absorbing pad. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0024] like Figures 1 to 4 As shown, a countersink drill with a replaceable guide column comprises a drill bit 1, a thread groove 12 is provided at the bottom end of the surface of the drill bit 1, and four clamping blocks 11 are provided on the surface of the drill bit 1;

[0025] A card slot is provided inside the card connection block 11, a fixed block is fixedly connected inside the card slot, and a spring block is fixedly connected to one side of the fixed block;

[0026] A return spring is arranged outside the spring block, and the return spring is fixedly connected to the clamping block 11 . The bottom end of the drill bit 1 is threadedly connected to a guide column 2 , and four clamping grooves 13 are arranged on the upper surface of the guide column 2 . Embodiment 2

[0027] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0028] The sizes of the clamping block 11 and the clamping groove 13 match each other. A chip removal groove 3 is provided on the surface of the guide column 2. The clamping block 11 and the clamping groove 13 are arranged to enhance the tightness of the connection between the drill bit 1 and the guide column 2.

[0029] The bottom end surface of the guide column 2 is fixedly connected with a clamping block 14, and a clamping seat 4 is arranged outside the clamping block 14. The guide column 2 is detachably connected with the clamping seat 4 through the clamping block 14, so that the guide column 2 is easy to replace when it is damaged.

[0030] The left side surface of the clamping seat 4 is threadedly connected with a fixing bolt 9, one side of the fixing bolt 9 is connected with a bearing 18, and one side of the bearing 18 is fixedly connected with a left clamping plate 19. By rotating the fixing bolt 9, the clamping block 14 is convenient to clamp, and it can be adjusted according to guide columns 2 of different sizes, thereby improving work efficiency. Embodiment 3

[0031] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0032] Screws 10 are provided on both sides of the fixing bolt 9, a shock-absorbing pad 22 is fixedly connected inside the clamping seat 4, one side of the shock-absorbing pad 22 is fixedly connected to a fixed clamping plate 20, and one side of the fixed clamping plate 20 is fixedly connected to a rubber pad 21. The shock-absorbing pad 22 can reduce a certain amount of vibration, and the setting of the two screws 10 facilitates improving the tightness of the device.

[0033] The bottom end surface of the clamping seat 4 is fixedly connected with a threaded block 17, the outer side of the threaded block 17 is threadedly connected with a fixing seat 16, the top end surface of the fixing seat 16 is provided with a limiting seat 5, the surface of the limiting seat 5 is threadedly connected with a fixing screw 15, and the fixing screw 15 is rotated. By providing the fixing seat 16 and the limiting seat 5, the tightness of the connection between the clamping seat 4 and the handle 6 is enhanced.

[0034] The bottom end surface of the fixing seat 16 is fixedly connected to the handle 6, the surface of the handle 6 is fixedly connected to the heat sink 7, the bottom end of the handle 6 is fixedly connected to the connecting block 8, and the fixing screw 15 passes through the interior of the limiting seat 5 and is threadedly connected to the handle 6. By coating the contact surface of the heat sink 7 and the handle 6 with a layer of thermal conductive silicone grease, the heat generated by the device is more effectively conducted to the heat sink 7, and then dissipated to the surrounding air through the heat sink 7, thereby improving the service life of the device.

[0035] Working principle: First, when the drill bit 1 moves toward the guide column 2, the clamping block 11 is pressed, and the reset spring is compressed by pressure, so that the clamping block 11 shrinks into the clamping groove until it reaches the clamping groove 13 opened on the surface of the guide column 2 for clamping. When the clamping state needs to be released, the staff presses the clamping block 11, and the clamping block 11 is squeezed inward and compressed into the clamping groove, so that the threaded groove 12 at the bottom end of the drill bit 1 is away from the guide column 2, which is convenient for arbitrary disassembly and replacement. The surface of the drill bit 1 is provided with a chip removal groove 3 for easy chip removal. Then, the fixing bolt 9 and the screw 10 on the left side of the clamping seat 4 are rotated, and the left clamping plate 19 is driven to move toward the fixed clamping plate 20 under the action of the bearing 18, and the clamping block 14 is clamped, thereby completing the guide. The assembly between the guide column 2 and the clamping seat 4 is convenient for replacing the guide column 2 when it is damaged. The rubber pad 21 provided therein can increase the service life of the guide column 2. The shock-absorbing pad 22 provided inside the clamping seat 4 can provide a certain shock-absorbing effect. Finally, the clamping seat 4 is rotated to thread the threaded block 17 at the bottom of the clamping seat 4 with the handle 6, and the fixing screw 15 is rotated. By providing a fixing seat 16 and a limit seat 5, the tightness of the connection between the clamping seat 4 and the handle 6 is enhanced. A layer of thermal conductive silicone grease is applied to the contact surface between the heat sink 7 and the handle 6, so that the heat generated by the device can be more effectively conducted to the heat sink 7, and then dissipated to the surrounding air through the heat sink 7, thereby increasing the service life of the device. The connecting block 8 is connected to the machine tool.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A countersink drill with a replaceable guide column, comprising a drill bit (1), characterized in that: A thread groove (12) is provided at the bottom end of the surface of the drill bit (1), and four clamping blocks (11) are provided on the surface of the drill bit (1); A card slot is provided inside the card connection block (11), a fixing block is fixedly connected inside the card slot, and a spring block is fixedly connected to one side of the fixing block; A return spring is arranged on the outside of the spring block, and the return spring is fixedly connected to the clamping block (11). The bottom end of the drill bit (1) is threadedly connected to a guide column (2), and the upper surface of the guide column (2) is provided with four clamping grooves (13).

2. A countersink drill with replaceable guide post according to claim 1, characterized in that: The sizes of the clamping block (11) and the clamping groove (13) match each other, and a chip removal groove (3) is provided on the surface of the guide column (2).

3. The countersink drill with replaceable guide post according to claim 1, characterized in that: A clamping block (14) is fixedly connected to the bottom end surface of the guide column (2), and a clamping seat (4) is arranged on the outer side of the clamping block (14).

4. The countersink drill with replaceable guide post according to claim 3, characterized in that: A fixing bolt (9) is threadedly connected to the left side surface of the clamping seat (4), a bearing (18) is connected to one side of the fixing bolt (9), and a left clamping plate (19) is fixedly connected to one side of the bearing (18).

5. The countersink drill with replaceable guide post according to claim 4, characterized in that: Screws (10) are provided on both sides of the fixing bolt (9), a shock-absorbing pad (22) is fixedly connected inside the clamping seat (4), a fixed clamping plate (20) is fixedly connected to one side of the shock-absorbing pad (22), and a rubber pad (21) is fixedly connected to one side of the fixed clamping plate (20).

6. The countersink drill with replaceable guide post according to claim 3, characterized in that: The bottom end surface of the clamping seat (4) is fixedly connected to a threaded block (17), the outer side of the threaded block (17) is threadedly connected to a fixing seat (16), the top end surface of the fixing seat (16) is provided with a limiting seat (5), and the surface of the limiting seat (5) is threadedly connected to a fixing screw (15).

7. The countersink drill with replaceable guide post according to claim 6, characterized in that: The bottom end surface of the fixing seat (16) is fixedly connected to the handle (6), the surface of the handle (6) is fixedly connected to a heat sink (7), the bottom end of the handle (6) is fixedly connected to a connecting block (8), and the fixing screw (15) passes through the interior of the limiting seat (5) and is threadedly connected to the handle (6).

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