Hard alloy gun drill with good wear-resistant effect

Abstract

The utility model relates to the technical field of gun drills, and discloses a hard alloy gun drill with a good wear-resistant effect, which comprises a drillstock body, a threaded groove arranged in the middle of the bottom of the drillstock body, a cylindrical fixed block in threaded connection with the inside of the threaded groove, a drill rod body fixed at the bottom end of the fixed block, and a drill bit body fixed at the bottom end of the drill rod body. A rectangular fixing groove is formed in the middle of the top of the fixing block, a rectangular top groove is formed in the top of the drill handle body and communicates with the fixing groove, and side holes are formed in the two sides, located on the upper side of the threaded groove, of the drill handle body correspondingly and communicate with the top groove. The hard alloy gun drill is rigorous in structure, the drill handle, the drill rod and the drill bit are assembled and formed, when the drill rod and the drill bit are abraded, only the drill rod and the drill bit need to be replaced, the drill handle does not need to be replaced together, the use cost of the hard alloy gun drill can be effectively reduced, the process of replacing the drill rod and the drill bit is convenient, the abraded drill rod and the abraded drill bit can be replaced in time, and the abrasion-resistant effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of gun drills, in particular to a hard alloy gun drill with good wear resistance. Background Art

[0002] Carbide gun drill is an effective deep hole processing tool with a wide range of processing range, from deep hole processing of mold steel, glass fiber, Teflon and other plastics to high-strength alloys. In deep hole processing with strict tolerance and surface roughness requirements, gun drill can ensure the dimensional accuracy, position accuracy and straightness of the hole.

[0003] In the patent document with the published announcement number CN212191408U, an integrally ground carbide gun drill is disclosed. The gun drill is integrally ground and formed by a tungsten steel rod. The gun drill includes a shank, a shank and a cutter head connected in sequence. A 3-5mm smooth transition section with a conical surface is provided between the shank and the cutter head. A kidney-shaped cooling hole is provided in the gun drill. A chip groove is provided on the cutter head and the cutter head. The chip groove is a 116° V-shaped groove. A mounting bevel with a length of 0.9-11mm is provided on the cylindrical surface of the shank, which is inclined toward the axis. The mounting bevel forms an angle of 2° with the axial direction of the gun drill. The mounting bevel is perpendicular to the first axial plane of the gun drill. The first axial plane forms an angle of 30° with the second axial plane that bisects the kidney-shaped cooling hole. The utility model grinds the entire tungsten steel rod into shape, avoids secondary clamping and welding processes, ensures the concentricity of the integral carbide gun drill, improves the service life and the stability of the product's deep hole processing accuracy, and facilitates the clamping of the gun drill on the equipment through the mounting bevel.

[0004] When the above device is in use, the drill shank, drill rod and drill bit are integrally formed. When the drill rod and drill bit are worn, they need to be replaced together with the drill shank, resulting in high cost of using the cemented carbide gun drill. Therefore, a cemented carbide gun drill with good wear resistance is needed to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a hard alloy gun drill with good wear resistance, which solves the problems raised in the background technology.

[0006] The embodiment of the present application provides a cemented carbide gun drill with good wear resistance, comprising a drill shank body, a threaded groove is provided in the middle position of the bottom of the drill shank body, a cylindrical solid block is connected to the internal thread of the threaded groove, a drill rod body is fixed to the bottom end of the solid block, a drill bit body is fixed to the bottom end of the drill rod body, a rectangular solid groove is provided in the middle position of the top of the solid block, a rectangular top groove is provided on the top of the drill shank body, the top groove is communicated with the solid groove, side holes are provided on both sides of the drill shank body located on the upper side of the threaded groove, the side holes are communicated with the top groove, a positioning block is movably provided inside the top groove, the bottom of the positioning block is movably arranged inside the fixing groove, a vertical spring is connected to the top of the positioning block and the inner top wall of the top groove, horizontal connecting rods are fixed to the side ends of both sides of the positioning block, and the two connecting rods are movably arranged inside the two side holes respectively.

[0007] Optionally, a vertical operating sleeve is fixed to the side ends of the two connecting rods that are away from each other, and the operating sleeve is movably mounted on the outside of the drill handle body.

[0008] By adopting the above technical solution, the connecting rod and the positioning block can be driven to rise by moving the operating sleeve upward.

[0009] Optionally, the size of the inner ring of the operating sleeve is matched with the size of the outer side of the drill shank body, and the outer ring of the operating sleeve is provided with friction patterns.

[0010] By adopting the above technical solution, the operating sleeve can be lifted and lowered stably.

[0011] Optionally, the size of the solid block matches the size of the thread groove, and the bottom end of the solid block is flush with the bottom end of the drill shank body.

[0012] By adopting the above technical solution, the top end of the solid block contacts the inner top wall of the thread groove.

[0013] Optionally, the size of the top groove matches the size of the positioning block.

[0014] By adopting the above technical solution, the positioning block, the connecting rod and the operating sleeve can be stably lifted and lowered, and the positioning block can be prevented from rotating inside the top groove.

[0015] Optionally, a rectangular guide groove is opened in the middle position of the top of the positioning block, a vertical column is fixed in the middle position of the inner top wall of the top groove, the bottom of the column is located inside the guide groove, and the spring is movably sleeved on the outside of the column.

[0016] By adopting the above technical solution, the spring can be stably expanded and contracted.

[0017] Optionally, the size of the column matches the size of the guide groove.

[0018] By adopting the above technical solution, the positioning block can be lifted and lowered stably.

[0019] Optionally, the size of the fixing groove matches the size of the positioning block.

[0020] By adopting the above technical solution, the solid block can be prevented from accidentally rotating relative to the drill shank body.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] The present application proposes a carbide gun drill with good wear resistance. If the drill rod and drill bit need to be replaced, the positioning block can be disengaged from the fixed groove by first moving the operating sleeve upwards, and then the solid block can be disengaged from the threaded groove by rotating the drill rod body, so that the worn drill rod and drill bit can be disassembled. Then, the operating sleeve is moved upwards, and then the solid block is threadedly connected to the inside of the threaded groove, and then the operating sleeve is released. Through the elastic force of the spring, the positioning block is inserted into the inside of the fixed groove, and the drill shank, drill rod and drill bit can be assembled, and the drill rod and drill bit can be replaced. The process of replacing the drill rod and drill bit is relatively convenient. The drill shank, drill rod and drill bit are assembled and formed. When the drill rod and drill bit are worn, only the drill rod and drill bit need to be replaced, and there is no need to replace them together with the drill shank, which can effectively reduce the use cost of the carbide gun drill. The process of replacing the drill rod and drill bit is relatively convenient, and the worn drill rod and drill bit can be replaced in time, and the wear resistance effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0025] Figure 3 This is a bottom bottom view of the drill handle body of the utility model;

[0026] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure at A in FIG.

[0027] In the figure: 1. drill handle body; 2. drill rod body; 3. drill bit body; 4. operating sleeve; 5. friction pattern; 6. thread groove; 7. fixing block; 8. side hole; 9. connecting rod; 10. top groove; 11. positioning block; 12. fixing groove; 13. spring; 14. column; 15. guide groove. DETAILED DESCRIPTION

[0028] See also Figure 1-4The utility model provides a technical solution: a hard alloy gun drill with good wear resistance, comprising a drill handle body 1, a thread groove 6 is provided in the middle of the bottom of the drill handle body 1, a cylindrical solid block 7 is connected to the inner thread of the thread groove 6, the size of the solid block 7 is adapted to the size of the thread groove 6, the top of the solid block 7 is in contact with the inner top wall of the thread groove 6, the bottom end of the solid block 7 is flush with the bottom end of the drill handle body 1, the solid block 7 is threadedly connected to the inner top wall of the thread groove 6, the stability of the solid block 7 in the thread groove 6 is high, the bottom end of the solid block 7 is fixed with a drill rod body 2, the bottom end of the drill rod body 2 is fixed with a drill bit body 3, the top of the solid block 7 is connected to the inner top wall of the thread groove 6, the bottom end ... A rectangular fixing groove 12 is provided in the middle position of the drill shank, a rectangular top groove 10 is provided on the top of the drill shank body 1, the top groove 10 is communicated with the fixing groove 12, side holes 8 are provided on both sides of the drill shank body 1 located on the upper side of the thread groove 6, the side holes 8 are communicated with the top groove 10, a positioning block 11 is movably provided inside the top groove 10, the bottom of the positioning block 11 is movably set inside the fixing groove 12, the top of the positioning block 11 and the inner top wall of the top groove 10 are connected with a vertical spring 13, and horizontal connecting rods 9 are fixed to the side ends on both sides of the positioning block 11, and the two connecting rods 9 are movably set inside the two side holes 8 respectively.

[0029] In some technical solutions, such as Figure 1-3 As shown, a vertical operating sleeve 4 is fixed to the side ends of the two connecting rods 9 that are away from each other. The operating sleeve 4 is movably sleeved on the outside of the drill shank body 1. By moving the operating sleeve 4 upward, the connecting rod 9 and the positioning block 11 can be driven to rise. The size of the inner ring of the operating sleeve 4 is matched with the size of the outer side of the drill shank body 1, so that the operating sleeve 4 can be stably raised and lowered. The outer ring of the operating sleeve 4 is provided with a friction pattern 5 to prevent the hand from slipping when moving the operating sleeve 4.

[0030] In some technical solutions, such as Figure 2 and Figure 4 As shown, the size of the top groove 10 is matched with the size of the positioning block 11 , so that the positioning block 11 , the connecting rod 9 and the operating sleeve 4 can be stably lifted and lowered, and the positioning block 11 can be prevented from rotating inside the top groove 10 .

[0031] In some technical solutions, such as Figure 2 and Figure 4 As shown, a rectangular guide groove 15 is provided in the middle position of the top of the positioning block 11, a vertical column 14 is fixed in the middle position of the inner top wall of the top groove 10, the bottom of the column 14 is located inside the guide groove 15, and the spring 13 is movably sleeved on the outside of the column 14, so that the spring 13 can stably extend and retract, and the size of the column 14 is adapted to the size of the guide groove 15, so that the positioning block 11 can be stably raised and lowered.

[0032] In some technical solutions, such as Figure 2 and Figure 4As shown, the size of the fixing groove 12 matches the size of the positioning block 11 , and the bottom of the positioning block 11 is inserted into the fixing groove 12 , which can prevent the fixing block 7 from accidentally rotating relative to the drill handle body 1 .

[0033] During use, if it is necessary to replace the drill rod and the drill bit, first, by moving the operating sleeve 4 upwards, the connecting rod 9 and the positioning block 11 can be driven to rise, so that the positioning block 11 can be separated from the fixed groove 12, and then by rotating the drill rod body 2, the solid block 7 can be driven to rotate, so that the solid block 7 can be separated from the thread groove 6, and the worn drill rod and drill bit can be disassembled, and then by moving the operating sleeve 4 upwards, the connecting rod 9 and the positioning block 11 can be driven to rise, so that the spring 13 can be contracted, and then by rotating the drill rod body 2, the solid block 7 can be threadedly connected to the inside of the thread groove 6 until the top of the solid block 7 contacts the inner top wall of the thread groove 6, so that the fixed groove 12 is connected to the top groove 10. At this time, the positioning block 11 is located on the upper side of the fixed groove 12, and then the operating sleeve 4 is released, and the spring is released. The elastic force of 13 can make the spring 13 stretch, and the bottom end of the spring 13 can drive the positioning block 11 to descend until the bottom of the positioning block 11 is inserted into the inside of the fixing groove 12, so as to prevent the fixing block 7 from accidentally rotating relative to the drill shank body 1, and stably fix the fixing block 7, the drill rod body 2 and the drill bit body 3, and complete the assembly of the drill shank, drill rod and drill bit, and complete the replacement of the drill rod and drill bit. The process of replacing the drill rod and drill bit is relatively convenient. The drill shank, drill rod and drill bit are assembled and formed. When the drill rod and drill bit are worn, only the drill rod and drill bit need to be replaced, and there is no need to replace them together with the drill shank, which can effectively reduce the use cost of the cemented carbide gun drill, and the process of replacing the drill rod and drill bit is relatively convenient. The worn drill rod and drill bit can be replaced in time, and the wear resistance effect is good.

Claims

1. A carbide gun drill with good wear resistance, comprising a drill shank body (1), characterized in that: A thread groove (6) is provided at the middle position of the bottom of the drill shank body (1), a cylindrical solid block (7) is connected to the inner thread of the thread groove (6), a drill rod body (2) is fixed to the bottom end of the solid block (7), a drill bit body (3) is fixed to the bottom end of the drill rod body (2), a rectangular solid groove (12) is provided at the middle position of the top of the solid block (7), a rectangular top groove (10) is provided at the top of the drill shank body (1), the top groove (10) is connected to the solid groove (12), and the top groove (10) located on the upper side of the thread groove (6) is connected to the drill bit body (3). Side holes (8) are provided on both sides of the drill handle body (1), and the side holes (8) are connected to the top groove (10). A positioning block (11) is movably provided inside the top groove (10). The bottom of the positioning block (11) is movably arranged inside the fixed groove (12). The top end of the positioning block (11) and the inner top wall of the top groove (10) are connected by a vertical spring (13). Horizontal connecting rods (9) are fixed to the side ends of both sides of the positioning block (11), and the two connecting rods (9) are movably arranged inside the two side holes (8) respectively.

2. A carbide gun drill with good wear resistance according to claim 1, characterized in that: A vertical operating sleeve (4) is fixed to the side ends of the two connecting rods (9) that are away from each other, and the operating sleeve (4) is movably sleeved on the outside of the drill handle body (1).

3. A hard alloy gun drill with good wear resistance according to claim 2, characterized in that: The size of the inner ring of the operating sleeve (4) matches the size of the outer side of the drill handle body (1), and the outer ring of the operating sleeve (4) is provided with friction patterns (5).

4. A cemented carbide gun drill with good wear resistance according to claim 1, characterized in that: The size of the solid block (7) is matched with the size of the thread groove (6), and the bottom end of the solid block (7) is flush with the bottom end of the drill shank body (1).

5. A cemented carbide gun drill with good wear resistance according to claim 1, characterized in that: The size of the top groove (10) is matched with the size of the positioning block (11).

6. A cemented carbide gun drill with good wear resistance according to claim 1, characterized in that: A rectangular guide groove (15) is provided in the middle of the top of the positioning block (11); a vertical column (14) is fixed in the middle of the inner top wall of the top groove (10); the bottom of the column (14) is located inside the guide groove (15); and the spring (13) is movably sleeved on the outside of the column (14).

7. A cemented carbide gun drill with good wear resistance according to claim 6, characterized in that: The size of the column (14) is matched with the size of the guide groove (15).

8. A cemented carbide gun drill with good wear resistance according to claim 1, characterized in that: The size of the fixing groove (12) is matched with the size of the positioning block (11).

Images