A drill collar deep hole laser cladding machine

Abstract

The invention discloses a drill collar deep hole laser cladding machine, which relates to the technical field of laser cladding equipment. The drill collar deep hole laser cladding machine comprises a processing machine, a laser cladding rod, a support seat and a moving device. The processing machine is provided with a rotating chuck; the head end of the laser cladding rod is provided with a laser cladding head; the outer wall of the laser cladding rod is provided with a support adjustment ring to adjust the radial position of the laser cladding head in the processing hole; the support adjustment ring comprises a fixed ring and a telescopic sleeve, and the fixed ring is provided with a plurality of telescopic sleeves in a circumferential direction to adjust the radial position of the support adjustment ring in the processing hole; the outer wall of the laser cladding rod is provided with a connection hole connected to the telescopic sleeve, and the tail end of the laser cladding rod is provided with a preset number of access holes to be connected with each of the connection holes one by one. By adopting the invention, the spacing between the laser cladding head and the processing surface can be stably and autonomously controlled.

Description

Technical Field

[0001] The invention relates to the technical field of laser cladding equipment, and in particular to a drill collar deep hole laser cladding machine. Background Art

[0002] Drill collars used in deep-sea drilling projects are generally designed with very deep processing holes. In order to improve their performance, it is generally necessary to perform surface modification technology for the processing space using laser cladding. However, due to the small diameter of the processing hole and the excessive processing depth, the laser cladding rod sags and bends due to its long length, which in turn affects the quality of the cladding. At the same time, based on the increased performance requirements of existing surface modifications, for specific cladding action requirements, such as during the cladding process, the laser cladding head and the processing surface need to be clad back and forth at different distances to obtain a cladding layer of a specific structure. However, due to the sag and bend of the laser cladding rod itself, it is difficult to stably control the distance between the laser cladding head and the processing surface. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a drill collar deep hole laser cladding machine, which can stably and autonomously control the distance between the laser cladding head and the processing surface.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a drill collar deep hole laser cladding machine, comprising a processing machine tool, a laser cladding rod, a support seat for placing a workpiece, and a moving device for moving the laser cladding rod, wherein the processing machine tool is provided with a rotating chuck for rotating the workpiece;

[0005] A laser cladding head is provided at one end of the laser cladding rod, and a preset number of access holes are provided at the other end of the laser cladding rod, and the moving device drives the laser cladding rod so that the laser cladding head extends into the processing hole in the workpiece;

[0006] Wherein, the outer wall of the laser cladding rod is provided with a support adjustment ring for adjusting the radial position of the laser cladding head in the processing hole;

[0007] The support adjustment ring comprises a fixed ring and a telescopic sleeve sleeved on the outer wall of the laser cladding rod, and a plurality of telescopic sleeves are arranged circumferentially on the fixed ring, so as to adjust the radial position of the support adjustment ring in the processing hole by controlling the extension amount of the telescopic sleeve;

[0008] The outer wall of the laser cladding rod is provided with a connecting hole connected to the telescopic sleeve, and the access hole is connected to the connecting hole in a one-to-one correspondence.

[0009] As an improvement of the above solution, the telescopic sleeve includes a telescopic inner tube and a telescopic outer tube connected to the connecting hole, the telescopic outer tube is sleeved on one end of the telescopic inner tube, and the other end of the telescopic inner tube is provided with a ball for contacting the inner wall of the processed hole.

[0010] As an improvement of the above solution, the support adjustment ring further includes a tightening screw fixedly connected to the laser cladding rod, and the fixing ring is circumferentially provided with a plurality of tightening screw holes on which the tightening screws are installed, so that the laser cladding rod is pressed by the tightening screws, so that the fixing ring is fixedly connected to the laser cladding rod;

[0011] The laser cladding rod comprises an extension rod for mounting the laser cladding head and a clamping and fixing rod, the clamping and fixing rod is provided with a docking groove for mounting the extension rod, and a side wall of the docking groove is provided with a fixed docking hole;

[0012] The clamping fixing rod and the extension rod are respectively provided with a first fluid channel and a second fluid channel, and one end of the extension rod is provided with an extension docking hole docking with the fixed docking hole;

[0013] The two ends of the first fluid channel are respectively connected to the access hole and the fixed docking hole, and the two ends of the second fluid channel are respectively connected to the connection hole and the extended docking hole, so that after the extension rod is inserted into the docking groove, the fixed docking hole is correspondingly connected to the extended docking hole.

[0014] As an improvement of the above scheme, the laser cladding head includes a light guide rod, a terminal reflective head provided with a reflector, and a laser nozzle installed on the light guide rod, wherein the terminal reflective head is arranged at one end of the light guide rod, and a light guide channel for laser to pass through is arranged in the light guide rod, and the laser injected into the light guide channel is reflected by the reflector and emitted from the light outlet hole of the laser nozzle;

[0015] The light guide rod is provided with a powder conveying channel for conveying powder, and the laser nozzle is provided with a powder outlet hole connected with the powder conveying channel, and the powder outlet holes are distributed around the light outlet hole;

[0016] The laser nozzle is provided with a connecting shaft for connecting with the light guide rod, the connecting shaft sleeve is provided with a rotating ring, the rotating ring is provided with a plurality of powder pressing blades, and the powder pressing blades are provided with an arc surface facing the powder outlet hole, so that when the rotating ring rotates, the powder pressing blades disperse the powder in the powder feeding channel to each of the powder outlet holes and press the powder into the powder outlet holes;

[0017] The end reflective head is provided with a driving groove, in which a motor and a mobile power supply for supplying power to the motor are arranged, the output shaft and the rotating ring of the motor are both provided with an annular transmission groove, a transmission rope is sleeved on the annular transmission groove, and the motor drives the rotating ring to rotate through the transmission rope.

[0018] As an improvement of the above solution, the processing machine tool is provided with a machine tool slide rail for mounting the support seat, and the support seat is slidably connected to the machine tool slide rail to move along the machine tool slide rail;

[0019] The moving device comprises an auxiliary machine tool provided with an auxiliary machine slide rail, a translation sliding seat slidably connected to the auxiliary machine slide rail, and a driving mechanism for driving the translation sliding seat to move along the auxiliary machine slide rail, wherein the auxiliary machine slide rail is arranged parallel to the machine tool slide rail;

[0020] The translation sliding seat is provided with a manipulator for clamping the laser cladding rod.

[0021] As an improvement of the above solution, the support seat includes a support sliding seat and a support assembly arranged on the support sliding seat, and the support sliding seat is slidably connected to the machine tool slide rail;

[0022] The support assembly comprises a support arm and a support roller, wherein the support arm is provided with the support roller to contact and support the workpiece;

[0023] The support base also includes an adjustment mechanism for adjusting the distance between the support arms;

[0024] The adjustment mechanism includes an adjustment slide rail and a transmission screw for driving the support arm to move. The bottom of the support arm is provided with a support arm slide seat slidably connected to the adjustment slide rail, and the support arm slide seat is provided with a transmission nut driven by the transmission screw.

[0025] The two sides of the transmission screw rod are respectively provided with threads with opposite spiral directions to respectively install the transmission nuts of the support arm slide seat.

[0026] As an improvement of the above solution, it also includes an auxiliary support frame for auxiliary supporting the laser cladding rod, and the auxiliary support frame is slidably connected to the machine tool slide rail;

[0027] The auxiliary support frame is provided with a lifting adjustment plate for supporting the laser cladding rod, and the lifting adjustment plate and the auxiliary support frame are both provided with travel holes for adjusting the connection position.

[0028] As an improvement of the above scheme, it also includes a fluid control device for controlling the extension and retraction of the telescopic sleeve, the fluid control device is provided with a plug-in end for connecting with each of the connection holes one by one; the fluid control device is slidably connected to the machine tool slide rail;

[0029] The plug-in end is communicated with a cylinder to control the extension and retraction of the corresponding telescopic sleeve through the cylinder; or, the plug-in end is communicated with a hydraulic cylinder to control the extension and retraction of the corresponding telescopic sleeve through the hydraulic cylinder.

[0030] As an improvement of the above solution, the laser cladding rod further includes an oil channel sealing seat, the oil channel sealing seat is provided with a hydraulic channel for communicating with the first fluid channel, a plugging assembly for plugging the hydraulic channel and a plugging slideway for installing the plugging assembly, the plugging slideway laterally passing through the hydraulic channel;

[0031] The blocking assembly includes symmetrically arranged blocking sliders and closing springs symmetrically arranged on both sides of the blocking slideway, wherein the closing springs drive the blocking sliders to move toward each other and close in contact to block the hydraulic channel;

[0032] The blocking sliders are all provided with conical concave surfaces. After the blocking sliders are in closed contact with each other, the blocking sliders are assembled through the conical concave surfaces to form a conical hole for the insertion of the plug end.

[0033] As an improvement of the above solution, the fluid control device further includes a positioning column, and the clamping fixing rod and the oil channel sealing seat are both provided with a positioning hole adapted to the positioning column for the positioning column to be inserted;

[0034] The clamping and fixing rod is provided with an annular groove for installing the oil passage sealing seat, and the oil passage sealing seat is provided with a connecting slider adapted to the annular groove, and the connecting slider moves along the annular groove so that the oil passage sealing seat rotates relative to the clamping and fixing rod, and the cross section of the annular groove is L-shaped or T-shaped;

[0035] The side wall of the positioning hole of the oil channel sealing seat is provided with a rotating slide groove, and the positioning column is arranged on a rotating driving block adapted to the rotating slide groove;

[0036] When the positioning column is inserted into the positioning hole, the rotation drive block is inserted into the rotation slot and moves along the rotation slot to drive the oil channel sealing seat to rotate to a preset position, and the hydraulic channel is correspondingly connected to the first fluid channel.

[0037] The implementation of the present invention has the following beneficial effects:

[0038] An embodiment of the present invention discloses a drill collar deep hole laser cladding machine, comprising a processing machine tool, a laser cladding rod, a support seat for placing a workpiece, and a moving device for moving the laser cladding rod. The processing machine tool is provided with a rotating chuck for rotating the workpiece, so the workpiece can be clamped by the rotating chuck to drive and control the rotation of the workpiece on the support seat.

[0039] Moreover, a laser cladding head is provided at one end of the laser cladding rod, and the moving device drives the laser cladding rod to control the depth of the processing hole of the laser cladding head in the workpiece;

[0040] The outer wall of the laser cladding rod is provided with a support adjustment ring to fine-tune the radial position of the laser cladding head in the processing hole;

[0041] The support adjustment ring comprises a fixed ring and a telescopic sleeve sleeved on the outer wall of the laser cladding rod, and a plurality of telescopic sleeves are arranged circumferentially on the fixed ring, so as to adjust the radial position of the support adjustment ring in the processing hole by controlling the extension amount of the telescopic sleeve;

[0042] Therefore, when the laser cladding head needs to be clad back and forth at different intervals between the laser cladding head and the processing surface, the extension and retraction of the telescopic sleeve can be controlled by indirect fluid drive, such as hydraulic drive or increase or decrease of air pressure, so as to directly and actively change the radial position of the laser cladding head, and the position control is stable.

[0043] On the other hand, the outer wall of the laser cladding rod is provided with a connection hole connected to the telescopic sleeve, and the other end of the laser cladding rod is provided with a preset number of access holes to be connected with each of the connection holes one by one. By using the rod body of the laser cladding rod itself as the main body of fluid communication, it is possible to avoid laying pipelines on the outer surface of the laser cladding rod, thereby facilitating the laser cladding rod to extend into the processing hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a three-dimensional structural schematic diagram of the drill collar deep hole laser cladding machine of the present invention;

[0045] Figure 2 It is a structural schematic diagram of the support and adjustment ring of the present invention;

[0046] Figure 3 It is a structural schematic diagram of the support assembly of the present invention;

[0047] Figure 4 It is a schematic cross-sectional view of the extension rod and the support adjustment ring of the present invention;

[0048] Figure 5 It is a schematic diagram of the connection structure between the extension rod, the clamping and fixing rod and the fluid control device of the present invention;

[0049] Figure 6 It is a schematic diagram of the cross-sectional structure of the laser cladding head of the present invention;

[0050] Figure 7 It is a structural schematic diagram of a laser cladding rod equipped with an oil channel sealing seat.

[0051] Figure 8 It is a schematic diagram of the structure of a positioning column provided with a rotating drive block. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] See also Figure 1 , 2 And 3, an embodiment of the present invention provides a drill collar deep hole laser cladding machine, comprising a processing machine tool 1, a laser cladding rod 2, a support seat 3 for placing a workpiece and a moving device 4 for moving the laser cladding rod 2, the processing machine tool 1 is provided with a rotating chuck 11 for rotating the workpiece; the rotating chuck 11 can be a claw plate of an existing lathe, and the processing machine tool is correspondingly provided with a rotating drive mechanism of the existing lathe for driving the claw plate to rotate.

[0054] A laser cladding head 5 is provided at one end of the laser cladding rod 2, and a preset number of access holes 2b are provided at the other end of the laser cladding rod. The moving device 4 drives the laser cladding rod 2 so that the laser cladding head 5 extends into the processing hole in the workpiece;

[0055] Wherein, the outer wall of the laser cladding rod 2 is provided with a support adjustment ring 6 to fine-tune the radial position of the laser cladding head 5 in the processing hole;

[0056] The support and adjustment ring 6 comprises a fixed ring 61 and a telescopic sleeve sleeved on the outer wall of the laser cladding rod 2, and a plurality of telescopic sleeves are circumferentially arranged on the fixed ring 61, so as to adjust the radial position of the support and adjustment ring 6 in the processing hole by controlling the extension amount of the telescopic sleeve;

[0057] The outer wall of the laser cladding rod 2 is provided with a connecting hole 2a connected to the telescopic sleeve, and the access hole 2b is connected to the connecting hole 2a in a one-to-one correspondence.

[0058] Specifically, see Figure 4 The telescopic sleeve includes a telescopic inner tube 62 and a telescopic outer tube 63 connected to the connecting hole 2a. The telescopic outer tube 63 is sleeved on one end of the telescopic inner tube 62. The other end of the telescopic inner tube 62 is provided with a ball 621 for contacting the inner wall of the processing hole to reduce the rotation obstruction and wear of the telescopic sleeve on the workpiece.

[0059] In order to improve the bearing capacity of the telescopic sleeve for the circumferential force, the support and adjustment ring 6 also includes a tightening screw 64 fixedly connected to the laser cladding rod 2, and the fixing ring 61 is circumferentially provided with a plurality of tightening screw holes on which the tightening screws 64 are installed, so that the laser cladding rod 2 can be pressed by the tightening screws 64, so that the fixing ring 61 is fixedly connected to the laser cladding rod 2, thereby reducing the force applied to the telescopic sleeve during the relative rotation of the workpiece, so as to reduce the impact on the sealing connection between the telescopic outer tube 63 and the connecting hole 2a.

[0060] See also Figure 5 The laser cladding rod 2 includes an extension rod 21 for installing the laser cladding head 5 and a clamping and fixing rod 22, the clamping and fixing rod 22 is provided with a docking groove 221 for installing the extension rod 21, and the side wall of the docking groove 221 is provided with a fixed docking hole 222; the clamping and fixing rod 22 and the extension rod 21 are respectively provided with a first fluid channel 223 and a second fluid channel 211, and one end of the extension rod 21 is provided with an extension docking hole 212 docked with the fixed docking hole 222; the two ends of the first fluid channel 223 are respectively communicated with the access hole 2b and the fixed docking hole 222, and the two ends of the second fluid channel 211 are respectively communicated with the connection hole 2a and the extension docking hole 212, so that after the extension rod 21 is inserted into the docking groove 221, the fixed docking hole 222 is correspondingly communicated with the extension docking hole 212.

[0061] With such arrangement, an extension rod 21 of a suitable length can be selected according to the depth of the workpiece processing hole for convenient loading and unloading, while maintaining the connection between the connecting hole 2a and the access hole 2b.

[0062] See also Figure 6 The laser cladding head 5 includes a light guide rod 51, an end reflective head 52 provided with a reflector 521, a focusing lens 58 and a laser nozzle 53 installed on the light guide rod 51. The end reflective head 52 is arranged at one end of the light guide rod 51. The light guide rod 51 is provided with a light guide channel 511 for laser to pass through. The laser injected into the light guide channel 511 is reflected by the reflector 521 and emitted from the light outlet hole 531 of the laser nozzle 53.

[0063] The laser cladding rod 2 is an overall tubular structure, that is, only a hole needs to be opened in the side wall of the laser cladding rod 2 to connect the optical fiber line to emit a laser beam to the light guide channel 511 of the light guide rod 51. This is a prior art and will not be described in detail here.

[0064] The light guide rod 51 is provided with a powder feeding channel 512 for conveying powder, and the laser nozzle 53 is provided with a powder outlet hole 532 connected to the powder feeding channel 512. The powder outlet holes 532 are distributed around the light outlet hole 531. Since the powder outlet holes 532 are built into the laser nozzle 53 and arranged around the light outlet hole 531, the powder can be preheated, thereby improving the efficiency of laser cladding.

[0065] On the other hand, in order to cope with the problem of powder clogging caused by long-distance powder transmission in ultra-deep hole processing, in particular, the powder delivery channel 512 and the powder outlet hole 532 are set at an angle, that is, powder is easy to be clogged at the corner between the powder delivery channel 512 and the powder outlet hole 532.

[0066] For this purpose, the laser nozzle 53 is provided with a connecting shaft 533 for connecting with the light guide rod 51, the light guide rod 51 is provided with a nozzle connecting hole adapted to the connecting shaft 533, and a screw hole for mutual threaded connection is provided between the connecting shaft and the nozzle connecting hole.

[0067] The connecting shaft 533 is sleeved with a rotating ring 534, and the rotating ring 534 is located at the powder delivery channel 512. The rotating ring 534 is provided with a plurality of powder pressing blades 535, and the powder pressing blades 535 are provided with an arc surface 5351 facing the powder outlet hole 532, so that when the rotating ring 534 rotates, the powder pressing blades can evenly disperse the powder in the powder delivery channel 512 to each of the powder outlet holes 532, and press the powder into the powder outlet holes 532, thereby solving the problem of powder clogging at the corner. The arc surface 5351 is arranged toward the powder outlet hole 532 at an inclination relative to the rotation plane of the rotating ring.

[0068] The end reflective head 52 is provided with a driving slot 522, in which a motor 54 and a mobile power source 55 for supplying power to the motor 54 are provided, the output shaft and the rotating ring of the motor 54 are both provided with an annular transmission slot, a transmission rope 56 is sleeved on the annular transmission slot, and the motor 54 drives the rotating ring 534 to rotate through the transmission rope 56. The mobile power source 55 and the motor 54 are arranged from top to bottom to facilitate replacement of the mobile power source. The transmission rope 56 is in a ring shape, and the transmission rope 56 can adopt the structure of an existing transmission belt.

[0069] Moreover, in order to facilitate the replacement of the transmission rope 56, the light guide rod 51 is provided with a docking surface 513 adapted to the terminal reflective head 52, and the docking surface 513 is provided with a transmission groove 57 for the movement of the transmission rope 56 and the output shaft of the motor 54. A rope threading hole for the transmission rope 56 to pass through is provided between the transmission groove 57 and the powder conveying channel 512. When the terminal reflective head 52 is removed, the transmission groove 57 is exposed to the outside, which is convenient for cleaning the powder brought by the transmission rope, and also provides a space for temporary storage of powder.

[0070] The processing machine 1 is provided with a machine slide rail 12 for mounting the support seat 3, and the support seat 3 is slidably connected to the machine slide rail 12 to move along the machine slide rail 12. Thus, the supporting position of the support seat 3 on the workpiece can be conveniently adjusted to adapt to the support of workpieces of different lengths.

[0071] The support seat 3 includes a support sliding seat 31 and a support assembly arranged on the support sliding seat 31, and the support sliding seat 31 is slidably connected to the machine tool slide rail 12;

[0072] The support assembly includes two symmetrically arranged support arms 32 and support rollers 33, wherein the support arms 32 are provided with the support rollers 33 to contact and support the workpiece. Therefore, by controlling the distance between the two support rollers 33 to be smaller than the diameter of the workpiece, stable support of the workpiece can be achieved, and the friction of the workpiece during rotation can also be reduced.

[0073] Moreover, in order to facilitate the adjustment of the distance between the two support arms 32 to accommodate workpieces with different diameters, the support seat 3 also includes an adjustment mechanism for adjusting the distance between the two support arms 32; the adjustment mechanism includes an adjustment slide rail 34 and a transmission screw 35 for driving the support arms 32 to move; the bottom of the support arm 32 is provided with an arm slide 36 slidably connected to the adjustment slide rail 34; the arm slide 36 is provided with a transmission nut driven by the transmission screw 35; the two sides of the transmission screw 35 are respectively provided with threads with opposite spiral directions to respectively install the transmission nuts of the arm slide 36. Therefore, the distance between the two support arms 32 can be controlled by only rotating the transmission screw 35.

[0074] Furthermore, in order to stabilize the rotation of the workpiece and avoid jumping, the support arm 32 is provided with two support rollers 33 to contact the upper and lower sides of the center of the workpiece respectively, thereby achieving a stable clamping effect on the workpiece.

[0075] The moving device 4 includes an auxiliary machine tool 41 provided with an auxiliary machine slide rail 42, a translation sliding seat 43 slidably connected to the auxiliary machine slide rail 42, and a driving mechanism for driving the translation sliding seat 43 to move along the auxiliary machine slide rail 42, wherein the auxiliary machine slide rail 42 is arranged in parallel with the machine tool slide rail 12; a manipulator 7 for clamping the laser cladding rod 2 is arranged on the translation sliding seat 43. Therefore, after the manipulator 7 completes the clamping of the workpiece, the driving mechanism is controlled to drive the laser cladding rod 2 stably and with a large stroke to extend into the processing hole. The driving mechanism can be a screw transmission mechanism of the prior art, or a rack is arranged in parallel on one side of the auxiliary machine slide rail 42, and a driving motor is arranged on the translation sliding seat 43, and the output shaft of the driving motor is provided with a gear meshing with the rack.

[0076] In order to cope with the extra-long laser cladding rod 2, the drill collar deep hole laser cladding machine further includes an auxiliary support frame 8 for auxiliary supporting the laser cladding rod 2, and the auxiliary support frame 8 is slidably connected to the machine tool slide rail 12;

[0077] The auxiliary support frame 8 is provided with a lifting adjustment plate 81 for contacting and supporting the laser cladding rod 2. The lifting adjustment plate 81 and the auxiliary support frame 8 are both provided with travel holes for adjusting the connection position. The lifting adjustment plate 81 and the auxiliary support frame 8 are connected and fixed by means of bolts passing through the travel holes and fastening with matching nuts.

[0078] Since the laser cladding rod 2 has a large range of movement in other preparation processes except for the one-way movement during the cladding process, in order to prevent the laser cladding rod 2 from being restrained by the gas supply pipeline of the access hole 2b, the drill collar deep hole laser cladding machine also includes a fluid control device 9 for controlling the extension and contraction of the telescopic sleeve, and the fluid control device 9 is provided with a plug end 91 for docking and communicating with each of the access holes 2a one by one, and the plug end 91 is connected to the cylinder to control the extension and contraction of the corresponding telescopic sleeve through the cylinder; the fluid control device 9 is slidably connected to the machine tool slide rail 12. Correspondingly, the extension and contraction drive of the telescopic sleeve can also be hydraulically driven, that is, the plug end 91 is connected to the hydraulic cylinder to control the extension and contraction of the corresponding telescopic sleeve through the hydraulic cylinder.

[0079] Therefore, when the access hole 2b of the laser cladding rod 2 needs to be connected to the air cylinder or hydraulic cylinder to perform the required cladding action, the fluid control device can be moved along the machine tool slide rail 12 to connect the access hole 2a with the plug end 91. This prevents the laser cladding rod 2 from being affected by the movement due to the need to connect a large number of pipelines.

[0080] See also Figure 7 and Figure 8 In order to be more suitable for hydraulic drive, the laser cladding rod further includes an oil channel sealing seat 23, wherein the oil channel sealing seat 23 is provided with a hydraulic channel 231 for communicating with the first fluid channel 223, a blocking component for blocking the hydraulic channel 231, and a blocking slide 232 for installing the blocking component, wherein the blocking slide 232 laterally passes through the hydraulic channel 231;

[0081] The blocking assembly includes symmetrically arranged blocking sliders 24 and closing springs 235 symmetrically arranged on both sides of the blocking slideway. The two blocking sliders 24 are sandwiched between the closing springs 235 on both sides. The closing springs 235 drive the blocking sliders 24 to move toward each other and close to each other to block the hydraulic channel 231.

[0082] The two blocking sliders 24 are both provided with a conical concave surface. After the two blocking sliders are closed and in contact, the blocking sliders are assembled through the conical concave surfaces to form a conical hole 241 for the insertion of the plug end 91. Therefore, after the plug end 91 is inserted into the hydraulic channel 231, the conical concave surface can be used to push the blocking slider 24 laterally, so that the plug end 91 can be connected to the first fluid channel 223. Such a configuration can prevent the hydraulic driving oil in the laser cladding rod from leaking before the plug end 91 is connected.

[0083] Furthermore, in order to better seal the hydraulic channel 231, the fluid control device also includes a positioning column 92, and the clamping fixing rod 22 and the oil channel sealing seat 23 are both provided with a positioning hole 25 adapted to the positioning column 92 for the positioning column 92 to be inserted, so that when the positioning column 92 is inserted into each of the positioning holes 25 in turn, the plug-in end 91 is guided to be inserted into the hydraulic channel 231 to connect the first fluid channel 223.

[0084] The clamping and fixing rod 22 is provided with an annular groove 224 for installing the oil channel sealing seat 23, and the oil channel sealing seat 23 is provided with a connecting slider 233 adapted to the annular groove 224. The connecting slider 233 moves along the annular groove 224 to allow the oil channel sealing seat 23 to rotate relative to the clamping and fixing rod 22. The cross-section of the annular groove 224 is L-shaped or T-shaped; accordingly, the annular groove 224 is provided with an entrance for the connecting slider 233 to be axially inserted into the annular groove 224.

[0085] The side wall of the positioning hole 25 of the oil passage sealing seat 23 is provided with a rotating groove 234, and the positioning column 92 is arranged on a rotating driving block 921 adapted to the rotating groove 234. When the positioning column 92 is inserted into the positioning hole 25, the rotating driving block 921 is inserted into the rotating groove 234 and moves along the rotating groove 234 to drive the oil passage sealing seat 23 to rotate to a preset position, and the hydraulic channel 231 is correspondingly connected with the first fluid channel. In this way, the end face of the oil passage sealing seat can be used to block the first fluid channel 223, and the disassembly of the oil passage sealing seat is also convenient. Based on the setting of the rotating groove and the rotating driving block 921, when the plug-in end 91 is connected with the first fluid channel 223, the rotating driving block will drive the oil passage sealing seat 23 to rotate, and after the rotating driving block 921 reaches the end of the rotating groove, the hydraulic channel 231 is correspondingly connected with the first fluid channel. Correspondingly, during the separation and disengagement of the plug-in end 91 from the first fluid channel 223 , the rotary drive block 921 drives the oil channel sealing seat 23 to reverse, so that the oil channel sealing seat 23 resumes sealing the first fluid channel 223 .

[0086] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A drill collar deep hole laser cladding machine, characterized in that: It comprises a processing machine, a laser cladding rod, a support seat for placing a workpiece, a moving device for moving the laser cladding rod and a fluid control device, wherein the processing machine is provided with a rotating chuck for rotating the workpiece; A laser cladding head is provided at one end of the laser cladding rod, and a preset number of access holes are provided at the other end of the laser cladding rod, and the moving device drives the laser cladding rod so that the laser cladding head extends into the processing hole in the workpiece; Wherein, the outer wall of the laser cladding rod is provided with a support adjustment ring for adjusting the radial position of the laser cladding head in the processing hole; The support adjustment ring comprises a fixed ring and a telescopic sleeve sleeved on the outer wall of the laser cladding rod, and a plurality of telescopic sleeves are arranged circumferentially on the fixed ring, so as to adjust the radial position of the support adjustment ring in the processing hole by controlling the extension amount of the telescopic sleeve; The outer wall of the laser cladding rod is provided with a connection hole connected to the telescopic sleeve, and the access hole is connected to the connection hole in a one-to-one correspondence; The processing machine tool is provided with a machine tool slide rail for mounting the support seat, and the support seat is slidably connected to the machine tool slide rail to move along the machine tool slide rail; The laser cladding head comprises a light guide rod, a terminal reflective head provided with a reflector, and a laser nozzle mounted on the light guide rod, wherein the terminal reflective head is arranged at one end of the light guide rod, and a light guide channel for laser to pass through is arranged in the light guide rod, and the laser injected into the light guide channel is reflected by the reflector and emitted from the light outlet hole of the laser nozzle; The light guide rod is provided with a powder conveying channel for conveying powder, and the laser nozzle is provided with a powder outlet hole connected with the powder conveying channel, and the powder outlet holes are distributed around the light outlet hole; The laser nozzle is provided with a connecting shaft for connecting with the light guide rod, the connecting shaft sleeve is provided with a rotating ring, the rotating ring is provided with a plurality of powder pressing blades, and the powder pressing blades are provided with an arc surface facing the powder outlet hole, so that when the rotating ring rotates, the powder pressing blades disperse the powder in the powder feeding channel to each of the powder outlet holes and press the powder into the powder outlet holes; The end reflective head is provided with a driving slot, in which a motor and a mobile power supply for supplying power to the motor are provided, the output shaft and the rotating ring of the motor are both provided with an annular transmission slot, a transmission rope is sleeved on the annular transmission slot, and the motor drives the rotating ring to rotate through the transmission rope; The fluid control device is used to control the extension and retraction of the telescopic sleeve, and the fluid control device is provided with a plug-in end for connecting with each of the connection holes one by one; the fluid control device is slidably connected to the machine tool slide rail; The plug-in end is communicated with a cylinder to control the extension and retraction of the corresponding telescopic sleeve through the cylinder; or, the plug-in end is communicated with a hydraulic cylinder to control the extension and retraction of the corresponding telescopic sleeve through the hydraulic cylinder.

2. The drill collar deep hole laser cladding machine according to claim 1, characterized in that: The telescopic sleeve comprises a telescopic inner tube and a telescopic outer tube connected to the connecting hole. The telescopic outer tube is sleeved on one end of the telescopic inner tube. The other end of the telescopic inner tube is provided with a ball for contacting the inner wall of the processing hole.

3. The drill collar deep hole laser cladding machine according to claim 2, characterized in that: The support adjustment ring also includes a tightening screw fixedly connected to the laser cladding rod, and the fixing ring is circumferentially provided with a plurality of tightening screw holes on which the tightening screws are installed, so that the laser cladding rod is pressed by the tightening screws, so that the fixing ring is fixedly connected to the laser cladding rod; The laser cladding rod comprises an extension rod for mounting the laser cladding head and a clamping and fixing rod, the clamping and fixing rod is provided with a docking groove for mounting the extension rod, and a side wall of the docking groove is provided with a fixed docking hole; The clamping fixing rod and the extension rod are respectively provided with a first fluid channel and a second fluid channel, and one end of the extension rod is provided with an extension docking hole docking with the fixed docking hole; The two ends of the first fluid channel are respectively connected to the access hole and the fixed docking hole, and the two ends of the second fluid channel are respectively connected to the connection hole and the extended docking hole, so that after the extension rod is inserted into the docking groove, the fixed docking hole is correspondingly connected to the extended docking hole.

4. The drill collar deep hole laser cladding machine according to claim 3, characterized in that: The moving device comprises an auxiliary machine tool provided with an auxiliary machine slide rail, a translation sliding seat slidably connected to the auxiliary machine slide rail, and a driving mechanism for driving the translation sliding seat to move along the auxiliary machine slide rail, wherein the auxiliary machine slide rail is arranged parallel to the machine tool slide rail; The translation sliding seat is provided with a manipulator for clamping the laser cladding rod.

5. The drill collar deep hole laser cladding machine according to claim 4, characterized in that: The support seat comprises a support sliding seat and a support assembly arranged on the support sliding seat, and the support sliding seat is slidably connected to the machine tool slide rail; The support assembly comprises a support arm and a support roller, wherein the support arm is provided with the support roller to contact and support the workpiece; The support base also includes an adjustment mechanism for adjusting the distance between the support arms; The adjustment mechanism includes an adjustment slide rail and a transmission screw for driving the support arm to move. The bottom of the support arm is provided with a support arm slide seat slidably connected to the adjustment slide rail, and the support arm slide seat is provided with a transmission nut driven by the transmission screw. The two sides of the transmission screw rod are respectively provided with threads with opposite spiral directions to respectively install the transmission nuts of the support arm slide seat.

6. The drill collar deep hole laser cladding machine according to claim 4, characterized in that: It also includes an auxiliary support frame for auxiliary supporting the laser cladding rod, wherein the auxiliary support frame is slidably connected to the machine tool slide rail; The auxiliary support frame is provided with a lifting adjustment plate for supporting the laser cladding rod, and the lifting adjustment plate and the auxiliary support frame are both provided with travel holes for adjusting the connection position.

7. The drill collar deep hole laser cladding machine according to claim 3, characterized in that: The laser cladding rod further comprises an oil channel sealing seat, wherein the oil channel sealing seat is provided with a hydraulic channel for communicating with the first fluid channel, a plugging assembly for plugging the hydraulic channel, and a plugging slideway for installing the plugging assembly, wherein the plugging slideway laterally passes through the hydraulic channel; The blocking assembly includes symmetrically arranged blocking sliders and closing springs symmetrically arranged on both sides of the blocking slideway, wherein the closing springs drive the blocking sliders to move toward each other and close in contact to block the hydraulic channel; The blocking sliders are all provided with conical concave surfaces. After the blocking sliders are in closed contact with each other, the blocking sliders are assembled through the conical concave surfaces to form a conical hole for the insertion of the plug end.

8. The drill collar deep hole laser cladding machine according to claim 7, characterized in that: The fluid control device further comprises a positioning column, and the clamping fixing rod and the oil passage sealing seat are both provided with a positioning hole adapted to the positioning column for the positioning column to be inserted; The clamping and fixing rod is provided with an annular groove for installing the oil passage sealing seat, and the oil passage sealing seat is provided with a connecting slider adapted to the annular groove, and the connecting slider moves along the annular groove so that the oil passage sealing seat rotates relative to the clamping and fixing rod, and the cross section of the annular groove is L-shaped or T-shaped; The side wall of the positioning hole of the oil channel sealing seat is provided with a rotating slide groove, and the positioning column is arranged on a rotating driving block adapted to the rotating slide groove; When the positioning column is inserted into the positioning hole, the rotation drive block is inserted into the rotation slot and moves along the rotation slot to drive the oil channel sealing seat to rotate to a preset position, and the hydraulic channel is correspondingly connected to the first fluid channel.

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