Automatic feeding device and feeding method for thickening drill pipe

Abstract

The present application relates to an automatic feeding device and feeding method for thickening drill pipes, including an axial feeding mechanism, the structure of which includes a mobile bracket, the upper surfaces of which are respectively installed with longitudinal guide rails, which are consistent with the axial feeding direction of the drill pipe, and the longitudinal guide rails are installed with a clamping bracket and a middle V-shaped bracket that slide along the longitudinal guide rails, and a clamping mechanism for clamping the drill pipe is installed in the clamping bracket; a driving gear is installed on the clamping bracket, and a long rack is installed on the inner side of the mobile bracket, which is meshed with the driving gear for transmission, driving the clamping bracket to move along the longitudinal guide rail to achieve axial feeding of the drill pipe; it also includes a lifting mechanism, the structure of which includes a fixed bracket, and a lifting drive member for lifting the mobile bracket is installed on the top, and the fixed bracket is movably connected to the mobile bracket through a connecting rod mechanism. The present application is suitable for automatic feeding of drill pipe thickening processes of different specifications and sizes, reducing labor intensity and improving feeding efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of automatic feeding devices, and in particular to an automatic feeding device and a feeding method for thickening a drill pipe. Background Art

[0002] Before the drill rod is thickened, it is necessary to manually carry the heated drill rod to the press and move it axially to the thickening position. At the same time, the drill rod has many length and diameter specifications, resulting in poor working environment, high labor intensity, low efficiency, etc. With the continuous development and improvement of industrial automation, in order to achieve automation and unmanned operation, it is necessary to study an automatic feeding device for drill rod processing to solve the problems of poor working environment, high labor intensity, and low efficiency caused by manual handling.

[0003] Application Contents

[0004] In view of the defects of the prior art, the present application provides an automatic feeding device and feeding method for drill rod thickening, which can solve the technical problem of low drill rod feeding efficiency in the drill rod thickening process and can realize automatic feeding of drill rods of different specifications and sizes.

[0005] The technical solutions adopted in this application are as follows:

[0006] An automatic feeding device for thickening a drill pipe comprises an axial feeding mechanism, the structure of which comprises a movable bracket, the upper surfaces of both sides of which are respectively provided with longitudinal guide rails which are consistent with the axial feeding direction of the drill pipe, the longitudinal guide rails are provided with a clamping bracket and at least one middle V-shaped frame which slide along the clamping bracket, the clamping mechanism is provided in the clamping bracket for clamping the drill pipe, the clamping mechanism cooperates with the middle V-shaped frame to support the drill pipe axially; the clamping bracket is provided with a driving gear, the inner side surface of the movable bracket is provided with a long rack which meshes with the driving gear for transmission, so that the clamping bracket moves along the longitudinal guide rail to realize the axial feeding of the drill pipe;

[0007] It also includes a lifting mechanism, which includes a fixed bracket, a lifting drive component for lifting the movable bracket is installed on the top of the fixed bracket, and the fixed bracket is movably connected to the movable bracket through a connecting rod mechanism, so that the movable bracket maintains balance when lifting.

[0008] Its further technical solution is:

[0009] The structure of the clamping mechanism includes symmetrically arranged clamping jaws, each of which is connected to a driving cylinder via a connecting frame, and the sides of the two connecting frames are respectively connected to a short rack. A driven gear is installed on the bottom plate of the clamping jaw bracket via a gear frame and a wheel axle, and the upper and lower sides of the driven gear are respectively meshed and connected with the two short racks.

[0010] A transverse guide rail is also installed on the bottom plate of the clamping jaw bracket, and two connecting frames are respectively slidably connected to the transverse guide rail, so that the clamping jaws clamp or release the drill rod in a direction perpendicular to the axial direction.

[0011] At least two middle V-shaped frames are provided and are respectively located on both sides of the clamping jaw bracket. First drive motors are respectively installed on both sides of the bottom of the clamping jaw bracket, and their output shafts are respectively connected to the middle V-shaped frame through a lead screw and a slider screwed to the lead screw; a V-shaped groove for placing a drill rod is provided at the top of the middle V-shaped frame.

[0012] One end of the movable bracket is fixedly connected to an end V-shaped frame, and the other end is fixedly connected to a photoelectric sensor. The end V-shaped frame is located on the same axis as the middle V-shaped frame and the clamping mechanism, and two rollers arranged in a V shape are provided at the top of the end V-shaped frame.

[0013] A second driving motor is also provided at the bottom of the clamping jaw bracket, and an output shaft of the second driving motor is connected to the driving gear.

[0014] The structure of the connecting rod mechanism includes a rotating shaft, a lever, a short connecting rod and a long connecting rod; the rotating shaft is installed at the front and rear ends of the fixed bracket through a bearing seat, and each of the two ends of the rotating shaft is connected to a lever, and the long connecting rod is symmetrically distributed on both sides of the fixed bracket, and each long connecting rod is used to connect the levers at both ends of the fixed bracket into one; the shifting rod has two rod bodies, one end of which is rotatably connected to the long connecting rod, and one end of the other rod body is rotatably connected to one end of the short connecting rod, and the other end of the short connecting rod is rotatably connected to the movable bracket.

[0015] The lifting drive member adopts a stepping cylinder, which is distributed at the four corners of the top surface of the fixed bracket and is used to keep the force balance of the movable bracket during lifting.

[0016] The movable bracket is provided with limit blocks at both ends of the longitudinal guide rail, and the limit blocks are used to limit the position of the middle V-shaped frame.

[0017] A feeding method using the above-mentioned drill pipe thickening automatic feeding device comprises the following steps:

[0018] Adjusting the axial support point of the drill rod: adjusting the distance between the at least one middle V-shaped frame and the clamping bracket according to the length of the drill rod, adjusting the support point of the drill rod to the optimal distribution position to avoid bending of the drill rod;

[0019] Clamping the drill rod: keeping the distance between the at least one middle V-shaped frame and the clamping jaw support unchanged, starting the clamping mechanism, using the two clamping jaws installed thereon to move synchronously, clamping the drill rod, and ensuring that its axis is in a centered position to prevent deviation;

[0020] Adjust the axial position of the drill rod: keep the distance between the at least one middle V-shaped frame and the clamping bracket unchanged, drive the clamping bracket and the drill rod to move along the axial direction through the meshing transmission of the driving gear and the long rack, and detect the end face position of the drill rod through the photoelectric sensor installed at the end of the moving bracket, so that it reaches the preset positioning point at the front section of the forging press;

[0021] Drill pipe lifting: start the lifting drive to push the mobile bracket upward, so that the drill pipe reaches a preset height, and the mobile bracket moves upward, and the connecting rod assembly keeps synchronous movement to ensure that the mobile bracket moves upward smoothly;

[0022] Adjust the axial position of the drill rod again: the driving gear and the long rack are meshed and driven again to drive the clamping jaw bracket and the drill rod to be fed along the axial direction, so that the drill rod is extended into the thickening station of the forging press.

[0023] The beneficial effects of this application are as follows:

[0024] The present application realizes automatic feeding of the drill rod thickening process through an axial feeding mechanism. Before feeding, the distance between the middle V-shaped frame and the clamping claw bracket is adjusted through a screw transmission mechanism to make the support points of the drill rod along the axial direction reasonably distributed to prevent it from bending.

[0025] The present application is applicable to drill rods of different specifications and sizes through the axial feeding mechanism, and has high flexibility.

[0026] The clamping mechanism of the present application achieves synchronous displacement of the clamping jaws through two short racks and synchronous meshing with the driven gear, thereby preventing the drill rod from deviating and ensuring the straightness of the drill rod axis.

[0027] The lifting mechanism of the present application facilitates the upward feeding of the drill rod, and ensures smooth lifting through the connecting rod mechanism.

[0028] The feeding method of the present application has no requirements for the initial loading position of the drill rod. After loading, the end position of the drill rod is adjusted by axial movement of the clamping jaw bracket to meet the automatic docking with the processing station on the forging machine. The operation is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of this application.

[0030] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0031] Figure 3 for Figure 1 Another perspective of .

[0032] Figure 4 for Figure 3 Enlarged view of part B in the middle.

[0033] Figure 5 This is the main view of the work status of this application.

[0034] In the figure: 1, longitudinal guide rail; 2, long rack; 3, clamping jaw bracket; 4, first drive motor; 5, middle V-shaped frame; 6, lead screw; 7, limit block; 8, photoelectric sensor; 9, fixed bracket; 10, movable bracket; 11, end V-shaped frame; 12, shift rod; 13, bearing seat; 14, rotating shaft; 15, stepping cylinder; 16, short connecting rod; 17, long connecting rod; 18, driving cylinder; 19, connecting frame; 20, clamping jaw; 21, short rack; 22, transverse guide rail; 23, driven gear; 24, gear rack; 25, drill rod; 26, driving gear; 27, second drive motor. DETAILED DESCRIPTION

[0035] The specific implementation of the present application is described below with reference to the accompanying drawings.

[0036] The drill pipe thickening automatic feeding device of this embodiment is as follows Figure 1 As shown, it includes an axial feeding mechanism, and its structure includes a movable bracket 10, and longitudinal guide rails 1 are respectively installed on the upper surfaces of both sides of the movable bracket 10, which are consistent with the axial feeding direction of the drill rod in the working state, and a clamping jaw bracket 3 and at least one middle V-shaped frame 5 sliding along the longitudinal guide rail 1 are installed, and a clamping mechanism is installed in the clamping jaw bracket 3, which is used to clamp the drill rod, and the clamping mechanism cooperates with the middle V-shaped frame 5 to support the drill rod along the axial direction;

[0037] like Figure 3 and Figure 4 As shown, a driving gear 26 is installed on the clamping jaw support 3, and a long rack 2 is installed on the inner side of the movable support 10, which is meshed with the driving gear 26 to drive the clamping jaw support 3 to move along the longitudinal guide rail 1 to achieve axial feeding of the drill rod;

[0038] It also includes a lifting mechanism, whose structure includes a fixed bracket 9, on the top of which is installed a lifting drive member for lifting the mobile bracket 10, and the fixed bracket 9 is movably connected to the mobile bracket 10 through a connecting rod mechanism, so that the mobile bracket 10 maintains balance when lifting.

[0039] In the above embodiment, if Figure 2 As shown, the structure of the clamping mechanism includes symmetrically arranged clamping jaws 20, each clamping jaw 20 is connected to a driving cylinder 18 through a connecting frame 19, and the sides of the two connecting frames 19 are respectively connected to a short rack 21. The bottom plate of the clamping jaw bracket 3 is equipped with a driven gear 23 through a gear frame 24 and a wheel axle, and the upper and lower sides of the driven gear 23 are respectively meshed and connected with the two short racks 21.

[0040] Specifically, the two clamping jaws 20 and the corresponding connecting frames 19 are symmetrically arranged, and the driven gear 23 is installed at the position of the symmetrical center axis through the gear frame 24, close to the side where the short rack 21 is installed; the short rack 21 is respectively arranged on the upper side of one of the connecting frames 19 and the lower side of the other connecting frame 19, and is meshed and connected with the driven gear 23 at the same time.

[0041] A transverse guide rail 22 is also installed on the bottom plate of the clamping jaw bracket 3, and the two connecting frames 19 are respectively slidably connected to the transverse guide rail 22, so that the clamping jaws 20 clamp or release the drill rod in a direction perpendicular to the axial direction.

[0042] In the above embodiment, as a preferred form, at least two middle V-frames 5 are provided and are respectively located on both sides of the clamping jaw bracket 3, and the first drive motor 4 is respectively installed on both sides of the bottom of the clamping jaw bracket 3, and the output shaft of the first drive motor 4 is connected to the middle V-frame 5 through a lead screw 6 and a slider screwed thereto, and a V-groove is provided at the top of the middle V-frame 5 for placing a drill rod.

[0043] Specifically, the two first drive motors 4 use reduction motors to respectively drive the lead screws 6 connected to them to rotate, and the two lead screws 6 extend in opposite directions along the clamping jaw bracket 3 respectively. The two lead screws 6 are respectively connected to the two middle V-shaped frames 5 through nuts screwed thereon. According to the length specifications of the drill rod to be loaded, the two first drive motors 4 adjust the distance between the two middle V-shaped frames 5 and the clamping jaw bracket 3 according to the set parameters, so that the distance between the middle V-shaped frame 5 and the clamping jaw bracket 3 and between the two middle V-shaped frames 5 match the corresponding drill rod, so that the support point of the drill rod is optimal.

[0044] Working principle of the above clamping mechanism:

[0045] After completing the previous process, Figure 5 The drill rod 25 shown is placed on the two middle V-shaped frames 5 and between the two clamping jaws 20 of the clamping mechanism, and the two driving cylinders 18 are started at the same time to synchronously push the clamping jaws 20 to move toward each other so as to clamp the drill rod 25; wherein, the short racks 21 respectively connected to the two connecting frames 19, the gear frame 24 is fixedly installed in the center of the bottom plate of the clamping jaw bracket 3, and the driven gear 23 is installed on the gear frame 24 through the wheel axle, which can specifically adopt a helical gear structure, and the corresponding two short racks 21 can adopt a helical rack form.

[0046] By determining an accurate gear transmission ratio, the two clamping jaws 20 can maintain synchronization and move the same distance during the clamping process, preventing the center of the drill rod 25 from shifting after clamping and causing the drill rod to bend. Therefore, the clamping mechanism of the present application realizes the synchronous movement of the two clamping jaws 20 and prevents the axis of the drill rod from shifting by setting a transmission structure in which two short racks 21 and a driven gear 23 are simultaneously meshed and connected.

[0047] In the above embodiment, a second drive motor 27 is further provided at the bottom of the clamping jaw bracket 3, and its output end is transmission-connected with the drive gear 26. Specifically, the second drive motor 27 is fixedly connected to the clamping jaw bracket 3 through a mounting bracket, and the second drive motor 27 adopts a reduction motor. When working, the second drive motor 27 drives the drive gear 26, which drives the clamping jaw bracket 3 to move by meshing with the long rack 2.

[0048] In the above embodiment, one end of the mobile bracket 10 is fixedly connected to the end V-frame 11, and the other end is fixedly connected to the photoelectric sensor 8. The end V-frame 11 is located on the same axis as the middle V-frame 5 and the clamping mechanism, and two rollers arranged in a V shape are provided at the top of the end V-frame 11. The end and middle of the drill pipe are supported by the end V-frame 11 and the two middle V-frames 5, respectively.

[0049] The structure of the connecting rod mechanism includes a rotating shaft 14, a lever 12, a short connecting rod 16 and a long connecting rod 17; the rotating shaft 14 is installed at the front and rear ends of the fixed bracket 9 through a bearing seat 13, and each end of the rotating shaft 14 is connected to a lever 12 respectively, and the long connecting rods 17 are symmetrically distributed on both sides of the fixed bracket 9, and each long connecting rod 17 is used to connect the levers 12 at both ends of the fixed bracket 9 into one; the lever 12 has two rod bodies, one end of which is rotatably connected to the long connecting rod 17, and one end of the other rod body is rotatably connected to one end of the short connecting rod 16, and the other end of the short connecting rod 16 is rotatably connected to the movable bracket 10.

[0050] Specifically, the lifting drive member adopts a stepping cylinder 15, which is installed at the four corners of the top surface of the fixed bracket 9 to ensure that the moving bracket 10 is balanced in force during the lifting process.

[0051] In the above embodiment, the movable bracket 10 is provided with limit blocks 7 at both ends of the longitudinal guide rail 1 , respectively, and the limit blocks 7 are used to limit the position of the middle V-shaped frame 5 .

[0052] The feeding method of the automatic feeding device for thickening drill pipe of this embodiment comprises the following steps:

[0053] Adjust the axial support point: according to the length of the drill rod, adjust the distance between the middle V-shaped frame 5 and the clamping jaw support 3 through the two first drive motors 4 and the corresponding screws 6 to adjust the support point to the best position to prevent the drill rod from bending;

[0054] Clamp the drill rod: keep the distance between the middle V-shaped frame 5 and the clamping jaw support 3 unchanged, start the clamping mechanism, and use the clamping jaws 20 to clamp the drill rod. During the clamping process, the short racks 21 connected to the two connecting frames 19 are simultaneously engaged with the driven gear 23 to ensure the synchronization of the movement of the two clamping jaws 20 and ensure that their axes are in the center to prevent deviation;

[0055] Adjust the axial position of the drill rod: keep the distance between the middle V-shaped frame 5 and the clamping bracket 3 unchanged, drive the clamping bracket 3 and the drill rod to move along the axial direction through the second driving motor 27 through the driving gear 26 and the long rack 2, and use the photoelectric sensor 8 to detect the front end position of the drill rod, so that the front end position of the drill rod reaches the preset positioning point at the front end of the forging machine;

[0056] Lifting the drill rod: Start the four stepping cylinders 15 installed on the fixed bracket 9 to push the mobile bracket 10 upward to locate the corresponding center height of the drill rod. The mobile bracket 10 moves upward, and at the same time, the short connecting rod 16 and the long connecting rod 17 drive the lever 12 to rotate, and the long connecting rod 17 keeps the front and rear ends and the left and right sides rotating synchronously, so as to improve the stability of the mobile bracket 10 during the upward movement;

[0057] Adjust the axial position of the drill rod again: drive the clamping jaw support 3 and the drill rod to feed axially through the second drive motor 27, so that the front end of the drill rod enters the corresponding thickening station position on the forging machine.

[0058] The feeding method of the automatic feeding device for thickening drill rods in the above-mentioned embodiment is applicable to the feeding of drill rods of various lengths and diameters. There is no requirement for the initial feeding position of the drill rod, that is, the unloading of the previous process can be directly fed to the middle V-shaped frame 5, the axial support point is adjusted by the middle V-shaped frame 5, the axial position is adjusted by the clamping jaw bracket 3 (then moved forward or backward), and the end position of the drill rod is adjusted in sequence according to the structure of the forging machine (first adjusted to the positioning point, then lifted and then moved forward) to meet the automatic docking with the processing station on the forging machine, which is easy to operate and efficient.

Claims

1. A drill pipe thickening automatic feeding method, characterized in that: The feeding device based on the method comprises an axial feeding mechanism, the structure of which comprises a movable bracket (10), the upper surfaces of both sides of which are respectively mounted with longitudinal guide rails (1) which are consistent with the axial feeding direction of the drill rod, the longitudinal guide rails (1) being mounted with a clamping bracket (3) and at least one middle V-shaped frame (5) which slide along the clamping bracket (3), the clamping mechanism being mounted inside the clamping bracket (3) for clamping the drill rod, the clamping mechanism cooperating with the middle V-shaped frame (5) to support the drill rod axially; the clamping bracket (3) being mounted with a driving gear (26), the inner side surface of the movable bracket (10) being mounted with a long rack (2) which meshes with the driving gear (26) for transmission, so that the clamping bracket (3) moves along the longitudinal guide rail (1) to realize axial feeding of the drill rod; It also includes a lifting mechanism, the structure of which includes a fixed bracket (9), a lifting drive member for lifting the movable bracket (10) is installed on the top of the fixed bracket (9), and the fixed bracket (9) is movably connected to the movable bracket (10) through a connecting rod mechanism, so that the movable bracket (10) maintains balance when lifting; The structure of the clamping mechanism comprises symmetrically arranged clamping jaws (20), each clamping jaw (20) being connected to a driving cylinder (18) via a connecting frame (19), the sides of the two connecting frames (19) being connected to a short rack (21), the two short racks (21) being arranged on the upper side of one of the connecting frames (19) and the lower side of the other connecting frame (19), the bottom plate of the clamping jaw bracket (3) being provided with a driven gear (23) via a gear rack (24) and a wheel axle, the upper and lower sides of the driven gear (23) being meshed and connected to the two short racks (21) respectively; A transverse guide rail (22) is also installed on the bottom plate of the clamping jaw bracket (3), and the two connecting frames (19) are respectively slidably connected to the transverse guide rail (22), so that the clamping jaw (20) clamps or releases the drill rod in a direction perpendicular to the axial direction; At least two of the middle V-shaped frames (5) are provided and are respectively located on both sides of the clamping jaw bracket (3); first drive motors (4) are respectively installed on both sides of the bottom of the clamping jaw bracket (3); the output shafts of the first drive motors (4) are respectively connected to the middle V-shaped frame (5) via a lead screw (6) and a slider screwed to the lead screw (6); a V-shaped groove for placing a drill rod is provided at the top of the middle V-shaped frame (5); One end of the movable bracket (10) is fixedly connected to an end V-shaped frame (11), and the other end is fixedly connected to a photoelectric sensor (8); the end V-shaped frame (11) is located on the same axis as the middle V-shaped frame (5) and the clamping mechanism; and two rollers arranged in a V shape are provided at the top end of the end V-shaped frame (11); The method comprises the following steps: Adjusting the axial support points of the drill rod: adjusting the distance between the at least one middle V-shaped frame (5) and the clamping jaw support (3) according to the length of the drill rod, adjusting the support points of the drill rod to an optimal distribution position, and avoiding bending of the drill rod; Clamping the drill rod: maintaining the distance between the at least one middle V-shaped frame (5) and the clamping jaw support (3) unchanged, starting the clamping mechanism, and utilizing the two clamping jaws (20) mounted thereon to move synchronously to clamp the drill rod and ensure that its axis is in a central position to prevent deviation; Adjusting the axial position of the drill rod: maintaining the spacing between the at least one middle V-shaped frame (5) and the clamping bracket (3) unchanged, driving the clamping bracket (3) and the drill rod to move along their axial direction through the meshing transmission of the driving gear (26) and the long rack (2), and detecting the end face position of the drill rod through the photoelectric sensor (8) installed at the end of the movable bracket (10), so that the drill rod reaches a preset positioning point at the front section of the forging press; Drill pipe lifting: starting the lifting drive component to push the movable bracket (10) upward, so that the drill pipe reaches a preset height, and the movable bracket (10) moves upward, and the movable bracket (10) maintains synchronous movement through the connecting rod mechanism, so as to ensure that the movable bracket (10) moves upward smoothly; Adjusting the axial position of the drill rod again: again meshing the driving gear (26) with the long rack (2) to drive the clamping jaw support (3) and the drill rod to be fed along the axial direction, so that the drill rod extends into the station to be thickened of the forging press; There is no requirement for the initial loading position of the drill rod, that is, the unloading material of the previous process can be directly sent to the middle V-shaped frame (5), and the axial support point is adjusted by the middle V-shaped frame (5), and the axial position is adjusted by the clamping claw bracket (3), and moved forward or backward. According to the structure of the forging machine, the end position of the drill rod is adjusted in sequence, first adjusted to the positioning point, then lifted, and then moved forward to meet the automatic docking with the processing station on the forging machine.

2. The method according to claim 1, characterized in that A second driving motor (27) is also provided at the bottom of the clamping jaw bracket (3), and its output shaft is connected to the driving gear (26).

3. The method according to claim 1, characterized in that The structure of the connecting rod mechanism comprises a rotating shaft (14), a shifting rod (12), a short connecting rod (16) and a long connecting rod (17); the rotating shaft (14) is installed at the front and rear ends of the fixed bracket (9) through a bearing seat (13); the two ends of each rotating shaft (14) are respectively connected to a shifting rod (12); the long connecting rods (17) are symmetrically distributed on both sides of the fixed bracket (9); each long connecting rod (17) is used to connect the shifting rods (12) at both ends of the fixed bracket (9) into one body; the shifting rod (12) has two rod bodies, one end of one rod body is rotatably connected to the long connecting rod (17), one end of the other rod body is rotatably connected to one end of the short connecting rod (16), and the other end of the short connecting rod (16) is rotatably connected to the movable bracket (10).

4. The method according to claim 1, characterized in that: The lifting drive member adopts a stepping cylinder (15), which is distributed at the four corners of the top surface of the fixed bracket (9) and is used to maintain the force balance of the movable bracket (10) during lifting.

5. The method according to claim 1, characterized in that The movable bracket (10) is provided with limit blocks (7) at both ends of the longitudinal guide rail (1), respectively, and the limit blocks (7) are used to limit the position of the middle V-shaped frame (5).

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