A bottom expansion anchor drill bit and processing device thereof

Abstract

The present invention discloses a bottom expansion anchor drill bit and a processing device thereof, and relates to the field of drill bits with guide components, including a drill rod body and a box body, wherein a connecting rod is installed at one end of the drill rod body close to the box body, and a tire frame is installed at the other end of the drill rod body; a coaxially arranged mounting hole is provided on the drill rod body and the tire frame, a push rod is slidably installed inside the mounting hole, one end of the push rod is fixed together with the box body, and a tool that can rotate outward is installed at the other end of the push rod; a placement groove is provided on the tire frame, and when the push rod is pushed forward, the tool rotates outward and opens; the box body is slidably installed on the outside of the connecting rod, and can slide in the drill rod body with the push rod. The present invention is provided with a box body, a drill rod body, a push rod and a tool, and when the box body is not pushed, the tool is in a storage state, so that the drill rod body is conveniently placed in the hole. After the bottom expansion is completed, the box body and the push rod are pulled in the opposite direction, so that the tool is stored in the placement groove, thereby facilitating the removal of the drill rod.

Description

Technical Field

[0001] The invention relates to the field of drill bits with guide components, in particular to a bottom-enlarged anchor drill bit and a processing device thereof. Background Art

[0002] The post-expansion anchor bolt refers to the bolt that expands the hole again at the bottom after the straight hole is drilled in the concrete substrate. The cavity after the hole expansion and the open key of the anchor bolt form an interlocking mechanism to achieve the post-anchor connection. In GB50367-2013 "Design Code for Reinforcement of Concrete Structures", this type of locking key anchor bolt is collectively referred to as post-expansion bottom anchor bolt.

[0003] After drilling a straight hole in the concrete substrate, a special drill bit needs to be inserted into the hole, and a special reaming drill bit is needed to expand the hole at the bottom of the hole. The reaming parts of commonly used reaming drill bits are fixedly connected to the drill rod body, which is inconvenient when inserted into the hole. For example, the Chinese patent with publication number CN206677253U discloses a special drill bit for rear bottom anchor bolts. The tool is fixedly connected to the swivel, and the diameter of the tool is slightly larger than the diameter of the drill body. When expanding the hole, the drill body must be tilted to complete the drilling, which is inconvenient to use. In addition, the debris and dust generated during the expansion process will also cause resistance to the drill body and the tool, affecting the rotation of the drill body and the tool, and in severe cases, it will also affect the extraction of the drill body. Summary of the invention

[0004] The object of the present invention is to provide a bottom expansion anchor drill bit and a processing device thereof to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a bottom expansion anchor drill bit, comprising a drill rod body and a box body, a drill handle is fixedly installed on a side of the box body away from the drill rod body, a connecting rod is installed on one end of the drill rod body close to the box body through a thread, and a tire frame coaxial with the drill rod body is installed on the other end of the drill rod body through a thread;

[0006] The drill rod body and the tire frame are provided with coaxially arranged mounting holes, and the axis of the mounting hole coincides with the axis of the drill rod body; a push rod is slidably installed inside the mounting hole, one end of the push rod is connected to the box body by a bolt, and a tool that can rotate outward is installed at the other end of the push rod;

[0007] A placement slot for placing the tool is provided on the tire frame, and a wedge is fixedly installed in the placement slot by bolts; when the push rod is pushed forward, the wedge causes the tool to rotate outward and open;

[0008] The box body is installed on the outside of the connecting rod and can slide on the outside of the connecting rod. When the box body slides in the axial direction of the connecting rod, it can slide in the drill rod body with the push rod.

[0009] Preferably, the outer side of the push rod is provided with inner air grooves distributed along the axial direction, and the outer sides of the drill rod body and the tire frame are provided with outer air grooves connected to each other.

[0010] An annular groove is provided on the peripheral side wall of one end of the drill rod body away from the tire frame, and a blade is fixedly installed at the bottom of the annular groove;

[0011] When expanding the hole, the drill rod body is inserted into the hole and rotates, driving the blades to rotate. The blades exhaust air to the outside, and the air enters the inner air groove from between the drill rod body and the box, and flows into the hole from the placement groove;

[0012] The wind and dust enter the outer wind slot together, and flow outward from the outer wind slot, thereby discharging the dust.

[0013] Preferably, the tool comprises a handle, a blade is inlaid on the handle, the handle and the blade are brazed together, the handle is connected to a tool holder via a pin, and the tool holder is fixedly mounted on one end of the push rod.

[0014] A setting groove for placing a blade is provided on one side of the handle extending out of the placement groove. A copper sheet is placed between the outer side of the blade and the inner side wall of the setting groove. During welding, laser is used to melt the copper sheet, thereby fixing the blade and the handle together.

[0015] Preferably, clamping holes are provided on both sides of the knife handle, the distance from the clamping hole to the upper side of the blade is the same as the distance from the clamping hole to the vertical side of the blade, and a pin hole is provided on the side of the knife handle away from the blade.

[0016] A processing device for a bottom-enlarging anchor drill bit comprises a laser and an optical path tube fixedly mounted on the laser, wherein the laser generated by the laser can be irradiated into the optical path tube;

[0017] A concave lens is arranged at the upper part of the inner cavity of the optical path tube, and a mounting ring is fixedly mounted on the outer peripheral surface of the concave lens, and the mounting ring is located inside the optical path tube;

[0018] A convex lens ring is also fixedly installed at the bottom of the inner cavity of the optical path tube, and the convex lens ring is located directly below the concave lens;

[0019] The convex lens ring is provided with a mounting opening, in which a convex lens is fixedly mounted;

[0020] The focused light beam A produced by the convex lens can melt the copper sheet;

[0021] The focused beam B generated by the convex lens ring is located on the periphery of the focused beam A, and can preheat the copper sheet and the welding part. The focused beam A and the focused beam B are arranged concentrically.

[0022] Preferably, the mounting ring can slide axially in the optical path tube, at least two symmetrically arranged sliders are fixedly mounted on the outer side of the mounting ring, and a slide groove for mounting the slider is provided on the inner side wall of the optical path tube, and the slider can slide in the slide groove.

[0023] A lead screw is installed on one of the sliders, one end of the lead screw is rotatably connected to the side wall of the slide slot, and the other end is installed with a motor, which is driven to rotate by the motor. The motor is fixedly installed at the edge of the slide slot.

[0024] The processing device also includes a processing table located directly below the laser, on which a clamping seat is fixed by bolts, an L-shaped bearing seat is installed on the clamping seat, a clamping plate is rotatably installed at the edge of the L-shaped bearing seat, and the clamping plate and the diameter of the L-shaped bearing seat form a U-shaped placement groove with an open top, and the tool handle is placed in the U-shaped placement groove.

[0025] Preferably, an axial hole is opened on the clamping seat, and a rotating shaft is fixedly installed on the outer side wall of the L-shaped bearing seat, and the rotating shaft is inserted into the axial hole;

[0026] A clamping ring matching the clamping hole is fixedly installed on the inner side wall of the U-shaped placement groove, and the rotating shaft and the clamping ring are coaxially arranged.

[0027] The inner wall of the U-shaped placement groove is also fixedly mounted with a positioning column matching the pin shaft hole;

[0028] A servo motor is fixedly mounted on the clamping seat, and the servo motor is used to drive the rotating shaft to rotate;

[0029] During welding, the servo motor can drive the rotating shaft to rotate, so that the end of the clamping ring away from the rotating shaft rotates downward, so that the tool handle is in a vertical state.

[0030] Preferably, a groove is provided at the edge of the horizontal plate of the L-shaped bearing seat, and a rotating shaft is fixedly installed on both sides of the clamping plate. The rotating shaft is installed in the groove and can rotate in the groove. A torsion spring is fixedly installed on the outer side of the rotating shaft to provide torsional force to the rotating shaft and the clamping plate, and provide clamping force to the tool handle.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a box, a drill rod body, and a push rod that slides inside the drill rod body, and a tool that can rotate outward and is rotatably installed at the end of the push rod. When the box and the push rod are not pushed, the tool is in a stored state, and the tool is stored in a placement groove of the tire frame, so that it is convenient to put the drill rod body into the hole. When expanding the bottom of the hole, pressing the box and the push rod inward can make the tool rotate outward and open, and the bottom of the hole is expanded as the drill rod body rotates. After the bottom expansion is completed, the box and the push rod are pulled in the opposite direction, so that the tool is stored in the placement groove, which is convenient for taking out the drill rod. It is very convenient to use, avoids the situation that the tool is stuck during the hole expansion process, and is convenient for putting the drill rod into the hole and taking it out of the hole.

[0033] The powder and debris generated during the hole expansion process directly enter the placement groove and the hole of the stand, avoiding the accumulation of powder and debris between the drill pipe body and the side wall of the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a cross-sectional view of embodiment 1 of the present invention;

[0035] Figure 2 It is a structural diagram of the whole of Embodiment 1 of the present invention;

[0036] Figure 3 is a cross-sectional view of embodiment 2 of the present invention;

[0037] Figure 4 It is a structural diagram of the whole of Embodiment 1 of the present invention;

[0038] Figure 5 This is a structural diagram of a push rod according to Embodiment 2 of the present invention;

[0039] Figure 6 It is a structural diagram of the knife handle and the blade of the present invention;

[0040] Figure 7 The structure diagram of the knife handle, the blade and the copper sheet of the present invention;

[0041] Figure 8 The figure is a schematic diagram of welding of the blade and the handle of the present invention;

[0042] Fig. 9 It is a structural diagram of the laser welding device of the present invention;

[0043] Fig.10 An exploded view of the optical path tube and the lens of the present invention;

[0044] Fig.11 It is a cross-sectional view of a concave lens and a convex lens in a welding state according to the present invention;

[0045] Fig.12 It is a cross-sectional view of the concave lens and the convex lens of the present invention in the quenching and heating state;

[0046] Fig.13 1 is a top view of the focused light beam A and the focused light beam B of the present invention;

[0047] Fig.14 An exploded view of the clamping seat and the L-shaped bearing seat of the present invention;

[0048] Fig.15 This is a structural diagram of an L-shaped bearing seat of the present invention;

[0049] Fig.16 This is a structural diagram of the knife handle of the present invention placed horizontally;

[0050] Fig.17 This is a state diagram of the drill bit of the present invention being located in a hole.

[0051] In the figure: 1. drill rod body; 2. box; 211. limit ring; 212. tire frame; 3. drill handle; 4. connecting rod; 5. push rod; 51. push rod positioning ring; 6. tool handle; 61. clamping hole; 62. pin shaft hole; 7. wedge; 8. annular groove; 9. blade; 10. outer wind groove; 11. inner wind groove; 12. blade; 13. copper sheet; 14. clamping seat; 15. rotating shaft; 16. clamping ring; 17. L-shaped bearing seat; 18. servo motor; 19. rotating shaft; 20. torsion spring; 21. splint; 22. positioning column; 23. laser; 24. optical path tube; 25. convex lens; 26. convex lens ring; 27. slider; 28. mounting ring; 29. ​​concave lens; 30. screw; 31. processing table. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Example 1

[0054] As shown in the figure, this embodiment discloses a bottom-enlarged anchor drill bit, including a drill rod body 1 and a box body 2. A drill shank 3 is fixedly installed on the side of the box body 2 away from the drill rod body 1. The drill shank 3 is a four-pit round pancake shank head.

[0055] The drill handle 3 is directly connected to the electric drill, providing power to the drill rod body 1 and driving the drill rod body 1 to rotate. A connecting rod 4 is installed at one end of the drill rod body 1 close to the box body 2. A mounting hole is provided at one end of the drill rod body 1 close to the box body 2, and an internal thread is provided in the mounting hole. An external thread is provided on the outer side of the connecting rod 4, and the connecting rod 4 is installed in the mounting hole through the thread. Figure 1 and Figure 2 shown.

[0056] The other end of the drill rod body 1 is provided with a tire frame 212 coaxially arranged with the drill rod body 1 through internal and external threads.

[0057] The drill rod body 1 and the tire frame 212 are provided with coaxially arranged mounting holes, and the axis of the mounting hole coincides with the axis of the drill rod body 1. A push rod 5 is installed inside the mounting hole, and the push rod 5 can slide in the mounting hole along the axial direction of the drill rod body 1, such as Figure 1 shown.

[0058] One end of the push rod 5 is fixedly mounted with a push rod positioning ring 51 through a hexagon socket bolt, and the push rod positioning ring 51 is fixedly connected to the box body 2 through the hexagon socket bolt, thereby connecting the push rod 5 to the box body 2. Figure 1 shown.

[0059] The other end of the push rod 5 is equipped with a tool that can rotate outward. A placement slot for placing the tool is provided on the tire frame 212, and a wedge block 7 is fixedly installed in the placement slot by a hexagon socket bolt; when the push rod 5 is pushed forward, Figure 1 In the direction of the arrow in the figure, the wedge block 7 causes the tool to rotate and open outward, and the tool performs hole enlarging processing on the inner wall of the hole.

[0060] The box body 2 is mounted on the outer peripheral surface of the connecting rod 4 and can slide on the outer side of the connecting rod 4. Figure 1 The connecting rod 4 extends into the inner cavity of the box body 2, and when the box body 2 slides in the axial direction of the connecting rod 4, it can bring the push rod 5 to slide axially in the drill rod body 1.

[0061] like Figure 1 As shown, a limit ring 211 is fixedly installed at the inner cavity opening of the box body 2 by means of a hexagon socket bolt. The limit ring 211 can also slide on the outside of the connecting rod 4. A retaining ring is fixedly installed on the side of the connecting rod 4 away from the drill pipe body 1 to prevent the limit ring 211 from falling off the connecting rod 4.

[0062] The retaining ring of the connecting rod 4 is a rectangular parallelepiped structure, and when the box body 2 rotates, it can rotate with the connecting rod 4 and the drill rod body 1 together.

[0063] The knife comprises a handle 6, on which a blade 12 is embedded, and the handle 6 and the blade 12 are brazed together. Figure 8 The knife handle 6 is provided with a pin hole 62, in which a pin is installed, and the knife handle 6 can rotate outward around the pin, and both ends of the pin are fixedly connected to a knife holder, which is fixedly installed at one end of the push rod 5.

[0064] like Figure 6 When pressure is applied to the push rod 5, the push rod 5 slides inward (as shown in FIG. Figure 1 The handle 6 opens outwards under the action of the wedge block 7 to achieve bottom expansion.

[0065] When drilling a hole, the drill handle 3 is installed on the electric drill, and the electric drill provides power. Then the drill rod body 1 and the tire frame 212 are inserted into the opened hole. Then, pressure is applied to the inside of the hole (or the wall direction) (the pressure is provided by the construction personnel), so that the box body 2 slides with the push rod 5 in the depth direction of the hole, so that the handle 6 and the blade 12 rotate outward together and apply pressure to the hole. When the drill rod body 1 rotates, the blade 12 can expand the inside of the hole.

[0066] During the hole expansion process, the powder and debris generated during the hole expansion process directly enter the placement groove and the hole of the stand to prevent the powder and debris from accumulating between the drill pipe body and the side wall of the hole. Figure 1 As shown in c, when the push rod 5 is pulled backward, more space is left in the tool holder groove to accommodate more powder debris.

[0067] After the hole expansion is completed, the drill rod body 1 can be pulled outward. In the process of pulling out, the box body 2 is first pulled outward, so that the box body 2 moves outward with the push rod 5. In the process of the push rod 5 moving outward, the handle 6 and the blade 12 are returned to the placement groove due to the limiting effect of the placement groove on the handle 6 and the blade 12, so that the drill rod body 1 can be pulled out more directly and conveniently. Avoid the situation where the drill rod body 1 cannot be pulled out due to the handle 6 and the blade 12 being in an open state.

[0068] Example 2

[0069] Further improvements made on the basis of Example 1:

[0070] When expanding the hole, powder debris will be generated inside the hole. When drilling, the debris will accumulate and increase the resistance of the drill bit, and even cause the drill rod to get stuck in the hole. After the hole is expanded, the powder in the hole must be blown away to remove the powder before the anchor bolt can be installed. Therefore, further improvements are made to the push rod 5 and the drill rod to solve the problem of powder in the hole.

[0071] The outer side of the push rod 5 is provided with an inner wind slot 11 distributed along the axial direction for introducing wind into the inner part of the hole. Figure 3 and Figure 5 As shown, the air inlet direction is Figure 3 Indicated by the arrow.

[0072] The outer sides of the drill rod body 1 and the tire frame 212 are provided with external wind grooves 10 which are interconnected. Figure 4As shown, the two outer air slots 10 are located on the same straight line. During the hole expansion process, the generated debris powder can fall into the outer air slot 10, avoiding the contact between the powder and the drill rod body 1, and preventing the drill rod from being stuck due to radiant heat.

[0073] An annular groove 8 is provided on the peripheral side wall of the end of the drill rod body 1 away from the tire frame 212, and a blade 9 is fixedly installed at the bottom of the annular groove 8. When the bottom of the hole is expanded, the drill rod body 1 can rotate with the blade 9, and the blade 9 can exhaust air to the outside when rotating, thereby carrying the airflow in the hole to flow to the outside. When the gas flows to the outside, Fig.17 As shown by the dotted arrow in the middle, the debris and powder in the hole can be discharged together, so as to clean the hole and avoid the debris and powder remaining in the hole. When the blade 9 rotates, it provides the gas with the power of flow.

[0074] When the drill rod body 1 is installed in the hole, the blades 9 are just located at the opening edge of the hole and can exhaust air outwards.

[0075] When the blade 9 rotates, since the blade 9 is located at the edge of the drill rod body 1, its rotation speed is relatively fast. When rotating, it will rotate with the drill rod body 1. When the blade 9 rotates, it will exhaust air to the outside under the action of centrifugal force. At the same time, the blade 9 will also exhaust air in the axial direction of the drill rod body 1. Figure 3 As shown by the dotted arrow in the middle, the wind in the hole is extracted.

[0076] When expanding the hole, the drill rod body 1 is extended into the hole, and the electric drill drives the drill rod body 1 to rotate, thereby driving the blades 9 to rotate, and the blades 9 exhaust air to the outside, and the air enters the inner air groove 11 from between the drill rod body 1 and the box 2, and flows into the hole from the placement groove, such as Figure 3 As indicated by the arrow in .

[0077] Wind and dust enter the outer wind slot 10 together and flow outward from the outer wind slot 10, thereby discharging debris, powder and dust. This prevents dust from affecting the drill rod, and after the dust is discharged, there is no need to clean the hole, and the anchor bolt can be installed directly, eliminating the cleaning process.

[0078] The side of the handle 6 extending out of the placement groove is provided with an inlay groove for placing the blade 12. As shown in the figure, the blade 12 is an L-shaped structure, and a copper sheet 13 is placed between the outer side of the blade 12 and the inner side wall of the inlay groove. Similarly, the copper sheet 13 is also an L-shaped structure, and one side of the copper sheet 13 contacts the side wall of the blade 12, and the other side contacts the handle 6. Figure 7 shown.

[0079] When welding, the copper sheet 13 is placed between the blade 12 and the side wall of the inlay groove. When welding, the laser directly melts the copper sheet 13, thereby welding the blade 12 and the inlay groove together. When the copper sheet 13 is placed between the two, the laser can directly weld the blade 12 and the handle 6 together when melting the copper sheet 13. Figure 8 As shown. Compared with the existing method of directly using copper bars and welding them by argon arc welding, which requires combustion aids such as borax, laser welding will not produce excess impurities, and the melted copper bars are directly located between the blade 12 and the side wall of the inlay groove, and will not flow outward, which can ensure the cleanliness of the welding part. The movement of the laser is driven by a screw rod, which is the same as the movement of an ordinary laser, and will not be repeated here.

[0080] Therefore, the present application designs a laser welding processing device for welding between a blade 12 and a handle. The device includes a laser 23, a processing table 31 and an optical path tube 24 fixedly mounted on the laser 23. The processing table 31 is located directly below the laser 23. Fig. 9 The laser light generated by the laser 23 can be irradiated into the optical path tube 24, as shown in FIG. Fig.11 and Fig.12 shown.

[0081] A concave lens 29 is disposed at the upper part of the inner cavity of the optical path tube 24, and a mounting ring 28 is fixedly mounted on the outer peripheral surface of the concave lens 29. The mounting ring 28 is located inside the optical path tube 24 and is fixedly connected to the inner wall of the optical path tube 24. The laser light is irradiated on the concave lens 29, and the concave lens 29 can diverge the laser line, such as Fig.11 and Fig.12 As shown by the dotted arrows and solid arrows in .

[0082] A convex lens ring 26 is also fixedly mounted on the bottom of the inner cavity of the optical path tube 24 . The convex lens ring 26 is located directly below the concave lens 29 . The convex lens ring 26 is fixedly connected to the lower side wall of the inner cavity of the optical path tube 24 .

[0083] The convex lens ring 26 is provided with an installation opening, in which the convex lens 25 is fixedly installed. Fig.10 The light generated at the center of the concave lens 29 is irradiated on the convex lens 25, and the convex lens 25 can focus the light. The focused light beam A generated by the convex lens 25 can melt the copper sheet 13, as shown in FIG. Fig.11 As shown by the solid arrow, the refractive index of the convex lens 25 is greater than that of the convex lens ring 26. When the convex lens 25 forms a high-temperature focal point, the convex lens ring 26 can form a high-temperature aperture.

[0084] The light generated at the edge of the concave lens 29 is irradiated on the convex lens ring 26, and the convex lens ring 26 can focus the light. The focused light beam B generated by the convex lens ring 26 is located at the periphery of the focused light beam A, as shown in FIG. Fig.11 and Fig.12 As shown by the dashed arrow in the middle. The focused beam B can preheat the copper sheet 13 and the welding part. The focused beam A and the focused beam B are arranged concentrically. Fig.13 shown.

[0085] When the copper sheet 13 is irradiated and melted, the focused beam A and the focused beam B are simultaneously irradiated on the welded copper sheet 13. The temperature of the focused beam A is relatively high and can melt the copper sheet 13. The focused beam B has a lower temperature than the focused beam A, and can preheat the copper sheet 13 and the welding point. Since the diameter of the focused beam B is larger than the diameter of the focused beam A, that is, the area of ​​the focused beam B is larger than the area of ​​the focused beam A, when the copper sheet 13 is laser irradiated and welded, the focused beam B will irradiate a large area, thereby achieving preheating of a larger area. When the focused beam A moves, the preheated portion of the copper sheet 13 will be heated and melted. During preheating, the hydrogen on the handle 6, the blade 12 and the copper sheet 13 can also overflow, thereby avoiding the occurrence of bubbles during welding.

[0086] When the focused beam A moves, since the irradiation range of the focused beam B is relatively large and the temperature of the focused beam B is lower than that of the focused beam A, when the welding point moves, the welding point of the focused beam A moves, while the focused beam B irradiates the molten welding point, which can insulate the welding point to prevent the temperature of the copper welding point from dropping too fast and to prevent the formation of hydrogen pores due to the rapid cooling of the weld and the excess hydrogen not having time to escape.

[0087] Example 3

[0088] Further improvements made on the basis of Example 2:

[0089] The mounting ring 28 is configured to be able to slide axially in the optical path tube 24. Two symmetrically arranged sliders 27 are fixedly mounted on the outer side of the mounting ring 28, such as Fig.10 The inner wall of the optical path tube 24 is provided with a slide groove for installing a slide block 27, and the slide block 27 can slide in the slide groove.

[0090] A screw rod 30 is installed on one of the sliders 27, one end of the screw rod 30 is rotatably connected to the side wall of the slide groove, and the other end of the screw rod 30 is installed with a motor and fixedly connected to the output shaft of the motor. The motor is rotated by the motor, and the motor is fixedly installed at the edge of the slide groove. The motor can provide power to the screw rod 30.

[0091] During brazing, the distance between the concave lens 29 and the convex lens can be adjusted using the screw rod 30 according to different situations.

[0092] When the copper sheet 13 needs to be melted and welded, the concave lens 29 is relatively close to the convex lens 25. Fig.11As shown, in this case, the refraction surface of the concave lens 29 is relatively small, and the light beam is relatively concentrated. Fig.11 As shown by the arrow in the middle (the solid arrow and the dotted arrow form a relatively small refractive light surface), more laser beams can enter the convex lens 25 and be refracted by the convex lens 25 into light spots with very high temperatures, thereby melting the copper sheet. Fig.11 As shown by the solid arrow in the middle. The laser beam that enters the convex lens ring 26 is relatively small. After being refracted by the convex lens ring 26, the laser beam forms a circular aperture with a slightly lower temperature, thereby heating the metal around the welding part. Fig.11 Indicated by the dashed arrow.

[0093] The laser beam generated by the convex lens 25 also has a heating quenching effect. When the quenching function is used, the screw 30 moves upward with the mounting ring 28 and the concave lens 29, so that the concave lens 29 is at a position far away from the convex lens 25, such as Fig.12 In this case, the refraction surface of the concave lens 29 is relatively large, and the light beam is relatively dispersed, as shown in FIG. Fig.12 As shown by the arrow in the middle (the larger refraction light surface formed by the solid arrow and the dotted arrow), the light beam entering the convex lens 25 is relatively small, and is refracted by the convex lens 25 into a light spot with a relatively high temperature, thereby performing a high-temperature heating treatment on the welding part, such as Fig.11 As shown by the solid arrow in the middle. The laser beams entering the convex lens ring 26 are relatively more, and after being refracted by the convex lens ring 26, the laser beams will form a circular aperture with a relatively high temperature, such as Fig.12 As shown by the dotted arrow, the metal around the weld is heated. After the weld is heated, the laser is turned off and the workpiece is cooled naturally (heat is quickly transferred to the unheated part of the shank 6 and the processing table 31), thereby achieving a quenching effect.

[0094] In a further embodiment, in order to facilitate the clamping of the tool handle, a clamping seat 14 is fixedly installed on the top plane of the processing table 31 by bolts, and an L-shaped bearing seat 17 is installed on the clamping seat 14. A clamping plate 21 is rotatably installed at the edge of the L-shaped bearing seat 17. The clamping plate 21 and the L-shaped bearing seat 17 form a U-shaped placement groove with a top opening. The tool handle 6 is placed in the U-shaped placement groove, as shown in FIG. Fig.14 shown.

[0095] The edge of the horizontal plate of the L-shaped bearing seat 17 is provided with a groove, such as Fig.15A rotating shaft 19 is fixedly installed on both sides of the clamping plate 21, and the rotating shaft 19 is installed in the groove and can rotate in the groove. A torsion spring 20 is fixedly installed on the outer side of the rotating shaft 19, and one end of the torsion spring 20 is fixedly connected to the side wall of the groove, and the other end is fixedly connected to the rotating shaft 19, providing a torsion force to the rotating shaft 19 and the clamping plate 21, providing a clamping force to the knife handle 6, and clamping the knife handle 6.

[0096] When placing the knife handle 6, the clamping plate 21 is rotated outward to enlarge the opening of the U-shaped placement groove, thereby facilitating the insertion of the knife handle 6. After the knife handle 6 is placed, the clamping plate 21 is released. Under the action of the torsion spring 20, the clamping plate 21 will return to its original position and clamp the knife handle 6.

[0097] Before placing the knife handle 6, it is necessary to put the blade 12 and the copper sheet 13 together into the inlay groove, assemble them with the knife handle 6, and then place the knife handle 6 in the U-shaped placement groove.

[0098] Clamping holes 61 are provided on both sides of the knife handle 6, and the distance from the clamping hole 61 to the upper side of the blade 12 is the same as the distance from the clamping hole 61 to the vertical side of the blade 12. Fig.16 The distances between a and b are the same.

[0099] The inner wall of the U-shaped placement groove is fixedly installed with a clamping ring 16 that matches the clamping hole 61, and the inner wall of the U-shaped placement groove is also fixedly installed with a positioning column 22 that matches the pin shaft hole 62. When the tool handle 6 is placed in the U-shaped placement groove, the clamping ring 16 is just stuck in the clamping hole 61, and the positioning column 22 is just stuck in the pin shaft hole 62, thereby positioning the tool handle 6.

[0100] The clamping seat 14 is provided with an axial hole, and a rotating shaft 15 is fixedly mounted on the outer side wall of the L-shaped bearing seat 17. The rotating shaft 15 is coaxially arranged with the clamping ring 16. The rotating shaft 15 is inserted into the axial hole and can rotate in the axial hole.

[0101] A servo motor 18 is fixedly mounted on the clamping seat 14, and the servo motor 18 is used to rotate the rotating shaft 15. The servo motor can rotate the rotating shaft 15 90 degrees, that is, from a horizontal state to a vertical state. The rotor speed of the servo motor 18 is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator and has the characteristics of a small electromechanical time constant and high linearity. The received electrical signal can be converted into an angular displacement or angular velocity output on the motor shaft. When the signal voltage is zero, there is no self-rotation phenomenon and self-locking can be achieved. (This technology is a prior art and will not be described in detail here).

[0102] During welding, the clamping seat 14 is kept in a horizontal position, and the handle 6 is placed in the U-shaped placement groove, and the laser can be used to heat and melt the copper sheet at the welding point for welding. After the upper welding of the handle 6 is completed, the servo motor 18 rotates with the rotating shaft 15, so that the end of the clamping ring 16 away from the rotating shaft 15 rotates downward, so that the handle 6 is in a vertical state, thereby welding the handle 6 and the side of the blade 12. Since the axis of the rotating shaft 15 is at the same vertical distance as the upper and vertical sides of the blade 12, when the clamping seat 14 is in a vertical state, the blade 12 and the side of the handle 6 are in a horizontal position, and the horizontal position coincides with the position of the blade 12 when the clamping seat 14 is in a horizontal state, that is, after the clamping seat 14 rotates 90 degrees, the plane located at the upper part remains on the original horizontal plane. During laser welding, there is no need to adjust the height of the laser, which is more convenient to use.

[0103] Although examples of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bottom anchor drill bit, comprising a drill rod body (1) and a box body (2), wherein a drill shank (3) is fixedly mounted on a side of the box body (2) away from the drill rod body (1), and characterized in that: A connecting rod (4) is threadedly mounted on one end of the drill rod body (1) close to the box body (2), and a tire frame (212) coaxially arranged with the drill rod body (1) is threadedly mounted on the other end of the drill rod body (1); The drill rod body (1) and the tire frame (212) are provided with coaxially arranged mounting holes, the axis of the mounting hole coincides with the axis of the drill rod body (1); a push rod (5) is slidably mounted inside the mounting hole, one end of the push rod (5) is connected to the box body (2) by a bolt, and a tool that can rotate outward is mounted on the other end of the push rod (5); A placement groove for placing a tool is provided on the tire frame (212), and a wedge block (7) is fixedly installed in the placement groove by bolts; when the push rod (5) is pushed forward, the wedge block (7) causes the tool to rotate outward and open; The box body (2) is installed on the outside of the connecting rod (4) and is able to slide on the outside of the connecting rod (4); when the box body (2) slides in the axial direction of the connecting rod (4), it can slide the push rod (5) in the drill rod body (1); The outer side of the push rod (5) is provided with an inner air groove (11) distributed along the axial direction, and the outer sides of the drill rod body (1) and the tire frame (212) are provided with outer air grooves (10) that are interconnected. An annular groove (8) is provided on the peripheral side wall of one end of the drill rod body (1) away from the tire frame (212), and a blade (9) is fixedly mounted at the bottom of the annular groove (8); When expanding the hole, the drill rod body (1) extends into the hole and rotates, causing the blades (9) to rotate. The blades (9) exhaust air outward, and the air enters the inner air groove (11) from between the drill rod body (1) and the box (2), and flows into the hole from the placement groove. The wind and dust enter the outer wind slot (10) together, and flow outward from the outer wind slot (10), thereby discharging the dust.

2. The bottom anchor drill bit according to claim 1, characterized in that: The knife comprises a knife handle (6), a blade (12) is embedded in the knife handle (6), the knife handle (6) and the blade (12) are brazed together, the knife handle (6) is connected to a knife holder via a pin, and the knife holder is fixedly mounted on one end of a push rod (5).

3. The bottom anchor drill bit according to claim 2, characterized in that: A mounting groove for accommodating a blade (12) is provided on one side of the knife handle (6) extending outside the placement groove, and a copper sheet (13) is placed between the outer side of the blade (12) and the inner side wall of the mounting groove. During welding, a laser is used to melt the copper sheet (13), thereby fixing the blade (12) and the knife handle (6) together.

4. A bottom anchor drill bit according to claim 2 or 3, characterized in that: Clamping holes (61) are provided on both sides of the knife handle (6); the distance between the clamping hole (61) and the upper side of the blade (12) is the same as the distance between the clamping hole (61) and the vertical side of the blade (12); and a pin hole (62) is provided on the side of the knife handle (6) away from the blade (12).

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