Drill pipe lifting and clamping mechanism and its usage method

Abstract

This invention belongs to the field of drilling tool manufacturing technology and provides a drill rod lifting and clamping mechanism and its usage method. The mechanism includes a material support rack, a lifting bracket, and a clamping bracket. The lifting bracket is equipped with a lifting cylinder and a V-shaped support plate. The cylinder drives the V-shaped support plate to rise and fall vertically to lift and support the drill rod. The clamping bracket has a hydraulic rotary cylinder and a pressure block at the top for clamping the drill rod. The lifting bracket and clamping bracket are adjustable in distance to accommodate drill rods of different diameters and lengths. In use, the drill rod is placed on the V-shaped support plate, and the hydraulic rotary cylinder drives the pressure block to rotate and clamp the drill rod, completing automatic loading and unloading and processing. This mechanism achieves fully automated operation of the entire process, including robotic arm gripping and unloading, automatic clamping, processing, and unloading. It has advantages such as compact structure, high lifting efficiency, good reliability, and convenient maintenance, significantly improving production efficiency, reducing labor intensity, ensuring processing quality, adapting to the lifting needs of various types and specifications of drill rods, and extending the service life of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of drilling tool manufacturing technology and relates to a drill pipe lifting and clamping mechanism and its usage method. Background Technology

[0002] Drill rods are a crucial component in coal mine drilling, connecting the drill bit and the drill platform. Their quality directly impacts drilling efficiency and safety. During the manufacturing process, the drill rod is placed in the moving fixture of a friction welding machine for welding. Afterward, it is removed from the fixture, the weld is tempered, and then further processed to remove surface weld spatter.

[0003] Currently, the double-headed external weld seams of friction-welded drill pipes mainly rely on manual loading and unloading. The drill pipe to be processed is placed in the appropriate position on the lathe chuck for clamping and positioning. After the external weld seam is machined, the drill pipe is manually removed from the chuck, completing the loading and unloading process manually. The shortcomings of manual loading and unloading for double-headed external weld seams machined by turning the machine are as follows:

[0004] 1) It is not conducive to the automation transformation of the production line;

[0005] 2) Manually moving the drill rod into the lathe's rotary chuck results in high labor intensity for workers, long machining auxiliary time, and low processing efficiency;

[0006] 3) Since the material is manually fed to the clamping position, the extension of the drill pipe joint needs to be intervened twice. At the same time, due to the overhang relationship, the machining quality is difficult to guarantee and turning quality defects are easy to occur.

[0007] 4) Due to the wide variety of large-diameter and long drill pipes, manual processing, manual loading and unloading, and manual handling pose significant safety hazards. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to overcome the above-mentioned shortcomings and provide a drill rod lifting and clamping mechanism and its usage method. This mechanism does not require manual handling of the drill rod into the lathe fixture. After milling, it automatically lifts, clamps, and releases the drill rod. It has a compact structure, high lifting efficiency, good reliability, and convenient maintenance.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A drill pipe lifting and clamping mechanism includes a material support rack groove plate and a lifting bracket and a clamping bracket fixedly mounted on the material support rack groove plate; a lifting bracket is provided on each side of the clamping bracket at a set interval.

[0011] The top of the lifting bracket is equipped with a lifting cylinder and a V-shaped support plate. The V-shaped support plate is slidably mounted on the lifting bracket in a vertical direction. The lifting cylinder is fixedly mounted on the lifting bracket and connected to the V-shaped support plate, driving the V-shaped support plate to rise and fall vertically. The V-shaped support plate is provided with a V-shaped groove, and contacts the outer circle of the drill rod through the V-shaped groove to lift and support the drill rod.

[0012] The top of the clamping bracket is equipped with a hydraulic angle cylinder and a pressure block; one end of the hydraulic angle cylinder is fixed on the clamping bracket, and the other end is connected to the pressure block, driving the pressure block to move vertically and rotate horizontally.

[0013] The drill rod is supported at both ends by V-shaped support plates on two lifting brackets and its height is adjusted. The middle part of the drill rod is pressed by a pressure block that rotates to the top of the drill rod.

[0014] Furthermore, the material support rack slot plate is detachably connected to the machine tool and located between two hydraulic chucks on both sides of the machine tool; the material support rack slot plate is provided with a sliding groove parallel to the drill rod, and the lifting bracket and clamping bracket are slidably disposed in the sliding groove for spacing adjustment and fixed by locking components.

[0015] Furthermore, the chute is a T-shaped chute or a dovetail chute, and the lifting bracket and clamping bracket are fixed to the material support frame chute plate by bolts.

[0016] Furthermore, the V-shaped support plates on the two lifting brackets are installed at the same height, and the two V-shaped support plates rise and fall synchronously. Typically, two lifting cylinders can be selected to simultaneously receive oil through the same inlet oil circuit and simultaneously exit oil through the same return oil circuit to ensure consistent lifting.

[0017] Furthermore, the V-shaped support plate is available in various sizes to match drill rods of different diameters.

[0018] Furthermore, a cylinder mounting seat is fixedly provided on the lifting bracket, and a slot is provided on the cylinder mounting seat. The V-shaped support plate is slidably disposed in the slot. The lifting cylinder is fixedly disposed on the cylinder mounting seat and connected to the V-shaped support plate through a cylinder connecting plate.

[0019] Furthermore, the hydraulic rotary cylinder is equipped with a rotating plate, and the pressure block is fixed to the rotating plate by bolts; the rotation angle range of the rotating plate is 0 to 90°, the rotating plate is parallel to the drill rod when it is at the 0° position, and perpendicular to the drill rod when it is at the 90° position.

[0020] Furthermore, the distance between the lifting bracket and the clamping bracket is 200-800mm to accommodate drill rods of different lengths.

[0021] A method of using the drill rod lifting and clamping mechanism as described above: After the drill rod lifting and clamping mechanism is installed on the machine tool and the spacing is adjusted, the lifting cylinder is filled with oil, which pushes the V-shaped support plate to move upward. At this time, the robot arm feeds the drill rod and places the drill rod on the two V-shaped support plates. The robot arm retracts, and at this moment, the hydraulic rotary cylinder is filled with oil, which drives the pressure block to rotate 90°. After reaching above the drill rod, it automatically presses down and clamps the drill rod.

[0022] The hydraulic chucks at both ends of the machine tool move to a designated position in the direction of the drill rod and automatically clamp the outer surface of the male and female connectors at both ends of the drill rod. After the hydraulic chuck clamps the drill rod, the lifting cylinder returns oil to drive the V-shaped support plate to move downward and disengage from the drill rod. At the same time, the hydraulic rotary cylinder returns oil to release the drill rod and drive the pressure block to rotate 90° to reset.

[0023] The machine tool spindle rotates to process both ends of the drill rod. After processing, the spindle stops rotating. At this moment, the lifting cylinder is filled with oil, pushing the V-shaped support plate upward. The hydraulic angle cylinder is filled with oil, causing the pressure block to rotate 90°. After it reaches the position, it automatically clamps the drill rod. The hydraulic chucks at both ends of the drill rod automatically release and disengage from the drill rod before resetting. Then, the hydraulic angle cylinder returns oil to release the drill rod, rotates 90°, and resets. At this time, the drill rod is in a free state, and the robot arm automatically grabs the drill rod and unloads it.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The drill rod lifting and clamping mechanism of this invention realizes the lifting and clamping function when the robot arm grabs the drill rod for unloading, the lowering and releasing function when the robot arm retracts to the chucks at both ends for clamping, the lifting and clamping function when the double chucks are removed after processing, and the lowering and releasing function when the robot arm unloads the material. This accurately realizes the automatic lifting, clamping, and releasing functions of the drill rod throughout the entire process of loading and unloading during processing, eliminating the need for manual handling of the drill rod to the lathe fixture. After milling, the drill rod is automatically lifted, clamped, and released. It features a compact structure, high lifting efficiency, good reliability, and convenient maintenance.

[0026] 2. The drill pipe lifting and clamping mechanism of the present invention also has the following advantages:

[0027] Reduced labor intensity: This mechanism eliminates the need for manual placement and removal of drill rods, achieving full automation through robotic loading and unloading. This significantly reduces the labor intensity of workers, eliminating one operator and saving 100,000 yuan annually. Its advantages are even more pronounced in the automated milling of external weld seams on large-diameter, extended drill rods, reducing auxiliary time, increasing milling efficiency by over 50%, ensuring the processing quality of milled external weld seams and maintaining production cycle time, truly achieving unmanned processing.

[0028] Extended service life: The use of a lifting clamping bracket significantly increases the service life of this lifting clamping mechanism, ensuring high reliability and a long life cycle, saving tens of thousands of yuan in replacement costs for key parts every year.

[0029] High efficiency and stability: Using hydraulic cylinders and hydraulic rotary cylinders as power sources ensures high stability, high load-bearing capacity, smooth operation, and no noise of the lifting and clamping mechanism, achieving a 100% pass rate for lifting, clamping, and releasing the drill rod in one go.

[0030] Simple and reliable: It adopts a direct connection between the lifting and clamping brackets, V-shaped support plates, material support rack troughs and hydraulic cylinders, which makes the structure simple, the connection reliable, and easy to maintain and install.

[0031] Adaptable to various types of drill pipes: The upper end of the lifting mechanism adopts a V-shaped support plate and a quick-change structure, which increases the overall adaptability of the lifting mechanism and can meet the lifting needs of different types of drill pipes.

[0032] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a front view of the drill pipe lifting and clamping mechanism in this invention.

[0035] Figure 2 This is a top view of the drill pipe lifting and clamping mechanism in this invention.

[0036] Figure 3 for Figure 1 Sectional view of AA.

[0037] Figure 4 for Figure 1 BB section view.

[0038] Figure 5 for Figure 3 View from the center (K ​​direction).

[0039] Reference numerals: 1-Material support rack trough; 2-Lifting bracket; 3-Clamping bracket; 4-Cylinder mounting base; 5-Hex socket head cap screw; 6-Standard spring washer; 7-Hex socket head cap screw; 8-Standard spring washer; 9-Hex socket head cap screw; 10-Standard spring washer; 11-Hex socket head cap screw; 12-Standard spring washer; 13-Hydraulic angle cylinder; 14-Pressure block; 15-Hexagonal thin nut; 16-T-slot locking block; 17-Hydraulic connector; 18-Thin hydraulic cylinder; 19-Hex socket head cap screw; 20-Cylinder connecting plate; 21-Hex socket head cap screw; 22-Standard spring washer; 23-V-shaped support plate. Detailed Implementation

[0040] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0042] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0043] Please see Figures 1-5This is a drill pipe lifting and clamping mechanism, including a material support rack trough plate 1 and a lifting bracket 2 and a clamping bracket 3 fixedly mounted on the material support rack trough plate 1; a lifting bracket 2 is provided on each side of the clamping bracket 3 at a predetermined interval; a lifting cylinder and a V-shaped support plate 23 are provided on the top of the lifting bracket 2, and the V-shaped support plate 23 is slidably mounted on the lifting bracket 2 vertically; the lifting cylinder is fixedly mounted on the lifting bracket 2 and connected to the V-shaped support plate 23, driving the V-shaped support plate 23 to rise and fall vertically; the V-shaped support plate 23 is provided with a V-shaped groove, and contacts the outer circle of the drill pipe through the V-shaped groove to lift and support the drill pipe;

[0044] The top of the clamping bracket 3 is equipped with a hydraulic angle cylinder 13 and a pressure block 14. One end of the hydraulic angle cylinder 13 is fixed on the clamping bracket 3, and the other end is connected to the pressure block 14, driving the pressure block 14 to rise and fall vertically and rotate horizontally. The two ends of the drill rod are supported by V-shaped support plates 23 on two lifting brackets 2 and their height is adjusted. The middle part of the drill rod is pressed by the pressure block 14 that rotates to the top of the drill rod, forming a clamping structure on the drill rod where the two ends are lifted upward and the middle is pressed downward.

[0045] The material support slot plate 1 is connected and fixed to the slant bed of the double-head CNC milling machine by hexagon socket head cap screws 7 and standard spring washers 8, and is located between two hydraulic chucks on both sides of the machine tool; the material support slot plate 1 is provided with a slide groove parallel to the drill rod, the slide groove is a T-shaped groove, the lifting bracket 2 and clamping bracket 3 are slidably installed in the slide groove, and the lifting bracket 2 and clamping bracket 3 are locked and fixed by T-shaped groove locking blocks 16, hexagon socket head cap screws 9 and standard spring washers 10. The distance between the lifting bracket 2 and the clamping bracket 3 can be slidably adjusted, and the adjustable range is 200-800mm.

[0046] The V-shaped support plates 23 on the two lifting brackets 2 are installed at the same center height, and the two V-shaped support plates 23 are raised and lowered synchronously. The two lifting cylinders are simultaneously fed into the same oil inlet circuit and simultaneously discharged from the same return oil circuit, ensuring that the lifting on both sides is synchronized. At the same time, the V-shaped support plates 23 are available in various sizes to match drill pipes of different diameters.

[0047] In this embodiment, the lifting cylinder is a thin hydraulic cylinder 18, which is connected to the hydraulic system via a hydraulic connector 17. A cylinder mounting base 4 is fixedly mounted on the lifting bracket 2. The cylinder mounting base 4 secures the thin hydraulic cylinder 18 to the mounting base 4 using hexagon head screws 5 and standard spring washers 6. A slot is provided on the cylinder mounting base 4, and a V-shaped support plate 23 is slidably mounted in the slot. The thin hydraulic cylinder 18 is fixedly mounted on the cylinder mounting base 4 and connected to the cylinder connecting plate 20 via hexagon head screws 19. The cylinder connecting plate 20 is connected to the V-shaped support plate 23 via hexagon head screws 21 and standard spring washers 22.

[0048] The hydraulic rotary cylinder 13 is fixed to the positioning plate of the clamping bracket 3 by hexagon socket head cap screws 11 and standard spring washers 12. A rotating plate is provided on the hydraulic rotary cylinder 13, and the pressure block 14 is fastened to the rotating plate by hexagonal thin nuts 15. The rotation angle range of the rotating plate is 0 to 90°. When the rotating plate is at the 0° position, it is parallel to the drill rod, and when it is at the 90° position, it is perpendicular to the drill rod.

[0049] The lifting brackets 2 on the left and right sides cause the piston rod of the thin hydraulic cylinder 18 to reciprocate linearly by means of oil inlet and outlet. The extension length of the piston rod is the lifting height of the drill rod. The hydraulic angle cylinder on the clamping bracket 3 in the middle also causes its piston rod to reciprocate linearly and rotaryly by means of oil inlet and outlet, thereby controlling the pressure block 14 to move back and forth within the range of 0 to 90°, clamping and releasing the drill rod.

[0050] A method of using the drill rod lifting and clamping mechanism as described in this embodiment involves installing the drill rod lifting and clamping mechanism on a double-head CNC milling machine and adjusting the spacing. Then, the lifting cylinder is filled with oil, which pushes the V-shaped support plate 23 upward. At this time, the robot arm loads the drill rod and places it on the two V-shaped support plates 23. The robot arm then retracts, and at this moment, the hydraulic rotary cylinder is filled with oil, which drives the pressure block 14 to rotate 90°. After reaching above the drill rod, it automatically presses down and clamps the drill rod.

[0051] The hydraulic chucks at both ends of the double-head CNC milling machine move to a designated position in the direction of the drill rod and automatically clamp the outer circular surfaces of the male and female connectors at both ends of the drill rod. After the hydraulic chuck clamps the drill rod, the lifting cylinder returns oil to drive the V-shaped support plate 23 to move downward and disengage from the drill rod. At the same time, the hydraulic rotary cylinder returns oil to release the drill rod and drive the pressure block 14 to rotate 90° to reset.

[0052] The machine tool spindle rotates, and the double milling heads automatically mill the outer weld seams at both ends of the drill rod. After the machining is completed, the spindle stops rotating, and the double milling heads automatically retract. At this moment, the lifting cylinder is filled with oil, which pushes the V-shaped support plate 23 to move upward. The hydraulic rotary cylinder is filled with oil, which drives the pressure block 14 to rotate 90°. After it reaches the position, it automatically clamps the drill rod. The hydraulic chucks at both ends of the double-head CNC milling machine automatically release and disengage from the drill rod and reset. Then, the hydraulic rotary cylinder returns oil to release the drill rod, rotates 90° and resets. At this time, the drill rod is in a free state, and the robot arm automatically grabs the drill rod and unloads it.

[0053] In this embodiment, the lifting and clamping functions eliminate the need for manual operation to place the drill rod into the three-jaw chuck of the double-headed CNC milling machine. After milling, there is no need for manual removal of the drill rod from the rotating chuck jaws. With the assistance of the robot for loading and unloading, the labor intensity of manual loading and unloading is reduced by 100%, eliminating the need for one operator and saving 100,000 yuan annually. The advantages are even more pronounced in the automated milling of the outer weld seams of large-diameter, extended drill rods, reducing auxiliary time, increasing milling efficiency by more than 50%, ensuring the processing quality of the milled outer weld scars and maintaining production cycle time, truly achieving unmanned processing.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A drill pipe lifting and clamping mechanism, characterized in that: It includes a material support rack trough and lifting brackets and clamping brackets fixedly mounted on the material support rack trough; a lifting bracket is provided on each side of the clamping bracket at a set interval; The top of the lifting bracket is equipped with a lifting cylinder and a V-shaped support plate. The V-shaped support plate is slidably mounted on the lifting bracket in a vertical direction. The lifting cylinder is fixedly mounted on the lifting bracket and connected to the V-shaped support plate, driving the V-shaped support plate to rise and fall vertically. The V-shaped support plate is provided with a V-shaped groove, and contacts the outer circle of the drill rod through the V-shaped groove to lift and support the drill rod. The top of the clamping bracket is equipped with a hydraulic angle cylinder and a pressure block; one end of the hydraulic angle cylinder is fixed on the clamping bracket, and the other end is connected to the pressure block, driving the pressure block to move vertically and rotate horizontally. The drill rod is supported at both ends by V-shaped support plates on two lifting brackets and its height is adjusted. The middle part of the drill rod is pressed by a pressure block that rotates to the top of the drill rod. The material support rack slot is detachably connected to the machine tool and located between two hydraulic chucks on both sides of the machine tool; the material support rack slot is provided with a sliding groove parallel to the drill rod, and the lifting bracket and clamping bracket are slidably disposed in the sliding groove for spacing adjustment and fixed by locking components; The hydraulic rotary cylinder is equipped with a rotating plate, and the pressure block is fixed to the rotating plate by bolts; the rotation angle range of the rotating plate is 0~90°, the rotating plate is parallel to the drill rod when it is at the 0° position, and perpendicular to the drill rod when it is at the 90° position.

2. The drill pipe lifting and clamping mechanism according to claim 1, characterized in that: The chute is a T-shaped chute or a dovetail chute, and the lifting bracket and clamping bracket are fixed to the material support frame chute plate by bolts.

3. The drill pipe lifting and clamping mechanism according to claim 1, characterized in that: The V-shaped support plates on the two lifting brackets are installed at the same height, and the two V-shaped support plates are raised and lowered synchronously.

4. The drill pipe lifting and clamping mechanism according to claim 3, characterized in that: The V-shaped support plate is available in various sizes to match drill pipes of different diameters.

5. The drill pipe lifting and clamping mechanism according to claim 1, characterized in that: The lifting bracket is fixedly provided with a cylinder mounting seat, and the cylinder mounting seat is provided with a slot. The V-shaped support plate is slidably disposed in the slot. The lifting cylinder is fixedly disposed on the cylinder mounting seat and is connected to the V-shaped support plate through a cylinder connecting plate.

6. The drill pipe lifting and clamping mechanism according to claim 1, characterized in that: The distance between the lifting bracket and the clamping bracket is 200~800mm.

7. A method of using the drill pipe lifting and clamping mechanism as described in any one of claims 1 to 6, characterized in that: After the drill rod lifting and clamping mechanism is installed on the machine tool and the spacing is adjusted, the lifting cylinder is filled with oil, which pushes the V-shaped support plate upward. At this time, the robot arm feeds the drill rod and places it on the two V-shaped support plates. The robot arm retracts, and at this moment, the hydraulic rotary cylinder is filled with oil, which drives the pressure block to rotate 90°. After it reaches above the drill rod, it automatically presses down and clamps the drill rod. The hydraulic chucks at both ends of the machine tool move to a designated position in the direction of the drill rod and automatically clamp the outer surface of the male and female connectors at both ends of the drill rod. After the hydraulic chuck clamps the drill rod, the lifting cylinder returns oil to drive the V-shaped support plate to move downward and disengage from the drill rod. At the same time, the hydraulic rotary cylinder returns oil to release the drill rod and drive the pressure block to rotate 90° to reset. The machine tool spindle rotates to process both ends of the drill rod. After processing, the spindle stops rotating. At this moment, the lifting cylinder is filled with oil, pushing the V-shaped support plate upward. The hydraulic angle cylinder is filled with oil, causing the pressure block to rotate 90°. After it reaches the position, it automatically clamps the drill rod. The hydraulic chucks at both ends of the drill rod automatically release and disengage from the drill rod before resetting. Then, the hydraulic angle cylinder returns oil to release the drill rod, rotates 90°, and resets. At this time, the drill rod is in a free state, and the robot arm automatically grabs the drill rod and unloads it.

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