Laser cladding repairing device for main shaft of large-displacement pump

Abstract

The utility model discloses a laser cladding repairing device for a main shaft of a large-displacement pump, and solves the problems that in the prior art, positioning is tedious and time-consuming, and the labor intensity is increased due to repeated disassembly and assembly in the detection process. The laser cladding repairing device for the main shaft of the large-displacement pump comprises a working platform, a double-supporting mechanism used for supporting a shaft piece and a supporting frame used for supporting a repairing detection head are arranged on the working platform, and the repairing detection head is connected to the supporting frame through a horizontal moving mechanism. And the repair detection head is connected with a laser cladding generation device arranged on the working platform through a pipeline. Under the action of a control system, the repairing detection head can complete the work of repairing point position identification, self-repairing, repairing result detection and grinding and polishing after repairing of the main shaft at a time, and the problems that in the prior art, positioning is tedious and time-consuming, and labor intensity is increased due to repeated disassembly and assembly in the detection process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft part repair, in particular to a laser cladding repair device for the main shaft of a large-displacement pump. Background Technique

[0002] Laser cladding is an advanced technology for surface repair and strengthening of parts. It greatly improves the reuse rate of parts and reduces costs. However, the quality of parts after laser cladding is affected and restricted by cladding equipment, processes, parts, etc., and defects are inevitable. Therefore, the workpiece needs to be subjected to repair quality inspection after laser cladding. When there are defects, re-cladding repair is required, and the position to be clad needs to be manually positioned, which takes a long time and is inaccurate, and also causes the problem of repeated cladding.

[0003] Currently, the laser cladding devices used for main shaft repair, such as a laser cladding device and a laser cladding method for slender workpieces disclosed in a Chinese patent with the publication number of CN 111809179 A, adopt single support, with low positioning accuracy, and can only complete the repair of the main shaft, and cannot perform the cladding quality inspection and judgment of the main shaft. Therefore, it is necessary to design a laser cladding repair device for shaft parts with high positioning accuracy that can both modify and perform on-line inspection. Content of the Utility Model

[0004] In view of the above deficiencies in the background technique, the utility model proposes a laser cladding repair device for the main shaft of a large-displacement pump, which solves the problems of cumbersome and time-consuming positioning and increased labor intensity due to repeated disassembly and assembly during the detection process in the prior art.

[0005] The technical solution of the utility model is realized as follows: A laser cladding repair device for the main shaft of a large-displacement pump includes a working platform. A double-support mechanism for supporting the shaft part and a support frame for supporting the repair detection head are arranged on the working platform. The repair detection head is connected to the support frame through a horizontal movement mechanism, and the repair detection head is connected to a laser cladding generating device arranged on the working platform through a pipeline. The double-support mechanism is used for double-positioning the shaft part to improve the positioning accuracy; the repair detection head can not only repair the shaft part but also detect it, avoiding the increase in labor intensity due to repeated disassembly and assembly during the detection process.

[0006] Further preferably, the double-support mechanism includes a slide rail arranged on the working platform. At least one front-end sliding support and at least one rear-end sliding support are slidably arranged on the slide rail. The shaft part is respectively rotatably connected to the front-end sliding support and the rear-end sliding support. The shaft part is connected to a driving motor arranged on the working platform through a coupling; the driving motor can drive the shaft part to rotate through the coupling.

[0007] Further preferably, a front bearing is provided on the front sliding support, and a rear bearing is provided on the rear sliding support. The front bearing and the rear bearing are respectively connected to the shaft member in a mating manner, enabling the rotation of the shaft member.

[0008] Further preferably, the shaft member is coaxially arranged with the output shaft of the driving motor; the coupling includes a coupling motor end and a coupling main shaft end, and an elastomer is provided between the coupling motor end and the coupling main shaft end; a screw portion that is in threaded cooperation with the shaft member is provided at the coupling main shaft end.

[0009] Further preferably, the support frame includes two portal frames, and the tops of the two portal frames are connected by a cross beam. The horizontal movement mechanism is arranged on the cross beam and can drive the repair detection head to move along the cross beam.

[0010] Further preferably, the horizontal movement mechanism includes a lead screw and a motor that drives the lead screw to rotate. A rail groove is formed on the cross beam, the lead screw is rotatably arranged in the rail groove, a sliding screw seat is slidably arranged in the rail groove, and the sliding screw seat is in threaded connection with the lead screw; the repair detection head is arranged on the sliding screw seat.

[0011] Further preferably, the repair detection head includes a telescopic member connected to the sliding screw seat. A rotary seat is provided at the telescopic end of the telescopic member, and a multi-station rack is provided on the rotary seat. A laser cladding head, an ultrasonic flaw detector, a small grinding machine, and an image acquisition device are respectively provided at four working positions of the multi-station rack. The laser cladding head is connected to a laser cladding generating device, and the laser cladding generating device, the ultrasonic flaw detector, the small grinding machine, and the image acquisition device are all connected to a host computer.

[0012] Further preferably, the rotary seat is rotatably arranged at the telescopic end of the telescopic member and is connected to a rotary motor arranged at the telescopic end of the telescopic member through a gear pair. Among them, the telescopic member is a telescopic oil cylinder or a telescopic air cylinder, which can drive the repair detection head to move up and down stably.

[0013] Further preferably, micro telescopic members are provided at four working positions of the multi-station rack, and the micro telescopic members drive the corresponding laser cladding head, ultrasonic flaw detector, small grinding machine, and image acquisition device to perform telescopic movement.

[0014] Further preferably, wire clips for limiting a plurality of pipelines are provided on the support frame to prevent the pipelines from being wound, further improving the working safety.

[0015] The beneficial effects of the present utility model are as follows: The present utility model uses a double-support mechanism to double-support the spindle part to be repaired, improving the positioning accuracy and stability of the shaft part; and this double-support mechanism cooperates with a coupling to realize the connection between the spindle part and the motor, with convenient installation and higher rotational speed control accuracy during spindle repair, improving the repair quality. The repair detection head of the present utility model, under the action of the control system, can complete the work of spindle repair point recognition, autonomous repair, repair result detection, and post-repair grinding and polishing at one time, solving the problems of cumbersome and time-consuming positioning and increased labor intensity due to repeated disassembly and assembly during the detection process in the prior art. The overall structure of the present utility model is simple, and the repair detection head can move in multiple degrees of freedom, improving the flexibility of its repair work; moreover, the adjustment accuracy of the repair detection head is high, further improving the repair and detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a front view schematic diagram of the present utility model.

[0018] Figure 2 It is a side view schematic diagram of the present utility model.

[0019] Figure 3 It is a top view schematic diagram of the present utility model.

[0020] Figure 4 It is a structural schematic diagram of the repair detection head.

[0021] Figure 5 It is a work flow chart of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0025] As Figure 1 shown in the figure, in Embodiment 1, a laser cladding repair device for the main shaft of a large-displacement pump includes a working platform 1, and the working platform serves as the main load-bearing component of this modification device. A double-support mechanism for supporting the shaft member 6 and a support frame 2 for supporting the repair detection head 3 are provided on the working platform 1; the double-support mechanism provides two-way support for the shaft member, improving the positioning accuracy and positioning stability of the shaft member. The repair detection head 3 is connected to the support frame 2 through a horizontal movement mechanism. Under the action of the horizontal movement mechanism, the repair detection head 3 can move relative to the support frame, and the moving direction is parallel to the axis direction of the shaft member. The repair detection head 3 is connected to a laser cladding device 9 and a host computer control box 10 provided on the working platform 1 through pipelines 11, as Figure 2 shown in the figure. A number of wire clips 12 for limiting the pipelines 11 are provided on the support frame 2; this prevents winding and jamming of the wires. The laser cladding device 9 includes functions such as laser generation and repair powder delivery, which are the same as those of existing laser cladding devices, ensuring the smooth progress of laser cladding work. The host computer in the host computer control box 10 controls the repair detection head 3 and the horizontal movement mechanism, etc. to perform corresponding actions to achieve intelligent laser cladding repair. It should be noted that: The present utility model improves the equipment components and does not involve improvements to the circuit and control program. The present utility model only controls the operation and stop of each electronic device through a PLC control system. Since the PLC control system is a mature automatic control system in the industry, the content of the circuit and control program will not be elaborated in the present utility model.

[0026] In this embodiment, as a preferred solution, as Figure 3As shown in the figure, the double support mechanism includes a slide rail 4 provided on the working platform 1. At least one front-end sliding support 4-1 and at least one rear-end sliding support 5-1 are slidably arranged on the slide rail 4. The front-end sliding support 4-1 and the rear-end sliding support 5-1 can move relative to the slide rail to adjust their relative positions, and can provide at least two supports for shaft parts of different lengths, improving the positioning accuracy and the applicability of the device. The shaft part 6 is respectively rotatably connected to the front-end sliding support 4-1 and the rear-end sliding support 5-1. Specifically, a front bearing 4-2 is provided on the front-end sliding support 4-1, and a rear bearing 5-2 is provided on the rear-end sliding support 5-1. The front bearing 4-2 and the rear bearing 5-2 are respectively connected in cooperation with the shaft part 6 to realize the rotation of the shaft part. The shaft part 6 is connected to a driving motor 8 provided on the working platform 1 through a coupling 7. The driving motor 8 is a variable-frequency motor, which provides a variable conveying speed for the shaft repair process. The driving motor drives the shaft part to rotate on the front-end sliding support 4-1 and the rear-end sliding support 5-1 through the coupling, so as to realize the repair and detection of the shaft part at different circumferential positions. The sliding support can slide along the axis on the slide rail 4. This support fixing device can realize the installation and fixation of shaft parts of different lengths, and is connected to the variable-frequency motor through a coupling. The variable-frequency motor can realize the rotation of the shaft to be repaired at any speed.

[0027] As a preferred mode, the shaft part 6 is arranged coaxially with the output shaft of the driving motor 8, reducing the torque between the driving motor and the shaft part, and playing a role in protecting the motor and the shaft part 6. The coupling 7 includes a coupling motor end 7-1 and a coupling main shaft end 7-2. An elastic body is provided between the coupling motor end 7-1 and the coupling main shaft end 7-2. The coupling main shaft end 7-2 is provided with a screw part that is in threaded cooperation with the shaft part 6. One end of the coupling is fixed through threaded connection matching with the shaft to be repaired 7, and the other end of the coupling is connected to the motor extension shaft through a flat key. The coupling is selected as an elastic coupling, and the driving motor 8 is selected as a variable-frequency motor. The variable-frequency motor is frequency-controlled by a frequency converter to realize a speed output of 3-15 r / min, ensuring the stable rotation of the shaft part and realizing the on-demand rotation of the repaired shaft.

[0028] As Figure 1 As shown in the figure, in Embodiment 2, a laser cladding repair device for the main shaft of a large-displacement pump. On the basis of Embodiment 1, in this embodiment, as a preference, the support frame 2 includes two portal frames 2-1. The portal frame is composed of 2 vertical beams and 1 top beam. The tops of the two portal frames 2-1 are connected by a cross beam 2-2 to provide support for the repair and detection head 3. The horizontal movement mechanism is arranged on the cross beam 2-2 and can drive the repair and detection head 3 to move along the cross beam 2-2, so as to perform axial repair and detection on the shaft part.

[0029] As a preferred solution, in this embodiment, the horizontal movement mechanism includes a lead screw 2-3 and a motor 2-4 that drives the lead screw 2-3 to rotate. A rail groove 2-5 is formed in the cross beam 2-2. The lead screw 2-3 is rotatably arranged in the rail groove 2-5. A sliding screw seat 2-6 is slidably arranged in the rail groove 2-5. The sliding screw seat is limited in the rail groove so that it can only move along the rail groove and cannot rotate. The sliding screw seat 2-6 is threadedly connected to the lead screw 2-3. When the lead screw rotates under the action of the motor, the sliding screw seat is driven to move along the rail groove. The repair detection head 3 is arranged on the sliding screw seat 2-6 and moves synchronously with the sliding screw seat.

[0030] As a preferred solution, as Figure 4 shown, the repair detection head 3 includes a telescopic member 3-1 connected to the sliding screw seat 2-6. The telescopic member 3-1 is a telescopic oil cylinder or a telescopic air cylinder, and a gear-rack mechanism can also be used to realize the lifting of the rotary seat 3-2. In this embodiment, taking the telescopic oil cylinder as an example, the telescopic end of the telescopic member 3-1 is provided with a rotary seat 3-2. A multi-station rack 3-3 is arranged on the rotary seat 3-2. A laser cladding head 3-4, an ultrasonic flaw detector 3-5, a small grinding machine 3-6, and an image acquisition device 3-7 are respectively arranged at four working points of the multi-station rack 3-3. The laser cladding head 3-4 is connected to a laser cladding generating device 9. The laser cladding generating device 9, the ultrasonic flaw detector 3-5, the small grinding machine 3-6, and the image acquisition device 3-7 are all connected to a host computer. Rotate the rotary seat so that the devices at the above four working points on the multi-station rack 3-3 perform corresponding laser cladding repair, ultrasonic flaw detection, grinding and polishing, and image acquisition and detection on the shaft part. The cladding material generated by the laser cladding generating device is injected through the laser cladding head 3-4 at the position of the shaft part to be repaired, and the shaft part is repaired with high precision. The ultrasonic flaw detector 3-5 is used to detect the repair result. If there are no pores and cracks, the repair is considered successful. The small grinding machine 3-6 grinds and polishes the repair point to improve the repair quality of the shaft part. The image acquisition device 3-7 can use a high-definition camera to collect the size scan image after repair and compare it with the part drawing pre-imported into the host computer system. After reaching the allowable tolerance, the repair is completed. The host computer includes an industrial control computer, a human-machine interaction interface. The industrial control computer is installed with a main shaft repair control program, including a contour recognition and reading program of the shaft to be repaired, a parameter input tool area program of the shaft to be repaired, a parameter comparison program, a cladding repair program, a defect detection program, a grinding program, etc.; to realize multi-functional intelligent shaft part repair.

[0031] Embodiment 3. A laser cladding repair device for the main shaft of a large-displacement pump is further optimized on the basis of Embodiment 2. In this embodiment, the rotary seat 3-2 is rotatably arranged at the telescopic end of the telescopic member 3-1, and the vertical position of the rotary seat is roughly adjusted through the telescopic member. It is connected to the rotary motor 3-8 arranged at the telescopic end of the telescopic member 3-1 through a gear pair; that is, in this embodiment, the rotary seat controls its rotation angle through the rotary motor, so as to achieve the purpose of adjusting the process. Specifically, the central part of the rotary seat involves a bushing, which is rotatably arranged at the telescopic end of the telescopic member through a bushing bearing. Then, a driven gear is provided on the bushing, and a driving gear is provided on the output shaft of the rotary motor. The rotary motor drives the driven gear to rotate through the driving gear, and then drives the rotary seat to rotate, so as to achieve the purpose of adjusting the working points of the multi-station rack and the purpose of intelligently repairing the shaft part.

[0032] Further preferably, micro telescopic members 3-9 are provided at the four working points of the multi-station rack 3-3. The micro telescopic members 3-9 can adopt micro cylinders or micro hydraulic cylinders to realize the fine adjustment of the vertical positions of the four process devices of the work. The micro telescopic members 3-9 drive the corresponding laser cladding heads 3-4, ultrasonic flaw detectors 3-5, small grinders 3-6 and image acquisition devices 3-7 to perform telescopic movement to ensure that they are at appropriate working heights.

[0033] As Figure 5 shown, the overall repair process of the main shaft part of the present utility model is as follows:

[0034] The first step is that the shaft part to be repaired (main shaft) is fixed on the working platform 1 through a double support mechanism and connected to the driving motor.

[0035] The second step is to import the part drawing of the shaft part to be repaired into the upper computer.

[0036] The third step is to identify the shaft part to be repaired: start the repair detection head of the repair device, rotate its image acquisition device to the working position. At this time, the upper computer controls the repair head to run to the end of the main shaft (motor end). After taking the position, the upper computer controls the main shaft driving motor to rotate to the specified speed. When the speed reaches the target speed, the image acquisition device starts to move to perform the outer contour scanning and identification of the main shaft. After the identification is completed, the identified contour is formed and stored in the upper computer.

[0037] The fourth step is damage identification: compare the identified contour with the drawing contour through the upper computer to find the position to be repaired, mark it and store the defect position in the upper computer.

[0038] The fifth step is that the upper computer calculates the repair trajectory and converts the trajectory into the linear motion speed of the repair detection head, the rotation speed of the main shaft driving motor, and the powder spraying speed instruction of the laser cladding device;

[0039] In the sixth step, the repair detection head, the driving motor of the shaft part to be repaired, and the laser cladding device execute the upper computer instructions to complete the repair of the damaged point.

[0040] In the seventh step, the repair result inspection: the ultrasonic flaw detector on the repair detection head rotates to the working position, runs to the repair position according to the upper computer instructions for repair result detection. If there are no pores and no cracks, the repair is considered successful. If there are pores or cracks, the system automatically executes the previous operation for secondary cladding repair until the detection meets the requirements.

[0041] In the eighth step, grinding after repair: the small grinding machine on the repair detection head rotates to the working position. The upper computer controls the grinding head to run above the repair point, controls the driving motor to rotate at high speed, and makes the grinding head slowly approach the main shaft to grind and polish the repair point. It should be noted that in special cases, manual grinding can also be carried out on the repaired part after repair, and the repair effect can also be monitored manually after repair.

[0042] In the ninth step, dimension inspection: the image acquisition device rotates to the working position, performs dimension scanning after repair, and compares the dimensions with the imported part drawing. After reaching the allowable tolerance, the repair is completed. If the repair tolerance is not reached, grinding is carried out until the drawing tolerance is met.

[0043] The above working process can complete the work of repair point identification, autonomous repair, repair result detection, and grinding and polishing after repair of the main shaft at one time, with convenient installation and high precision in controlling the rotation speed of the main shaft.

[0044] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser cladding repair device for the main shaft of a large-displacement pump, comprising a working platform (1), characterized in that: The working platform (1) is provided with a double-support mechanism for supporting the shaft part (6) and a support frame (2) for supporting the repair detection head (3). The repair detection head (3) is connected to the support frame (2) through a horizontal movement mechanism, and the repair detection head (3) is connected to a laser cladding device (9) arranged on the working platform (1) through a pipeline (11). The double-support mechanism includes a slide rail (4) arranged on the working platform (1). At least one front slide support (4-1) and at least one rear slide support (5-1) are slidably arranged on the slide rail (4). The shaft part (6) is respectively rotatably connected to the front slide support (4-1) and the rear slide support (5-1). The shaft part (6) is connected to a drive motor (8) arranged on the working platform (1) through a coupling (7).

2. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 1, wherein: A front bearing (4-2) is arranged on the front slide support (4-1), and a rear bearing (5-2) is arranged on the rear slide support (5-1). The front bearing (4-2) and the rear bearing (5-2) are respectively connected to the shaft part (6) in a mating manner.

3. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 2, wherein: The shaft part (6) is arranged coaxially with the output shaft of the drive motor (8); the coupling (7) includes a coupling motor end (7-1) and a coupling main shaft end (7-2). An elastomer is arranged between the coupling motor end (7-1) and the coupling main shaft end (7-2); the coupling main shaft end (7-2) is provided with a screw part in threaded fit with the shaft part (6).

4. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 1, characterized in that: The support frame (2) includes two portal frames (2-1). The tops of the two portal frames (2-1) are connected through a cross beam (2-2). The horizontal movement mechanism is arranged on the cross beam (2-2) and can drive the repair detection head (3) to move along the cross beam (2-2).

5. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 4, characterized in that: The horizontal movement mechanism includes a lead screw (2-3) and a motor (2-4) for driving the lead screw (2-3) to rotate. A rail groove (2-5) is formed on the cross beam (2-2). The lead screw (2-3) is rotatably arranged in the rail groove (2-5). A sliding screw seat (2-6) is slidably arranged in the rail groove (2-5). The sliding screw seat (2-6) is in threaded connection with the lead screw (2-3); the repair detection head (3) is arranged on the sliding screw seat (2-6).

6. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 5, wherein: The repair detection head (3) includes a telescopic rod member (3-1) connected to the sliding screw seat (2-6). A rotary seat (3-2) is arranged at the telescopic end of the telescopic rod member (3-1). A multi-station frame (3-3) is arranged on the rotary seat (3-2). A laser cladding head (3-4), an ultrasonic flaw detector (3-5), a small grinding machine (3-6) and an image acquisition device (3-7) are respectively arranged at four working positions of the multi-station frame (3-3). The laser cladding head (3-4) is connected to the laser cladding device (9). The laser cladding device (9), the ultrasonic flaw detector (3-5), the small grinding machine (3-6) and the image acquisition device (3-7) are all connected to the upper computer.

7. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 6, wherein: The rotary seat (3-2) is rotatably arranged at the telescopic end of the telescopic rod member (3-1) and is connected to a rotary motor (3-8) arranged at the telescopic end of the telescopic rod member (3-1) through a gear pair.

8. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 6 or 7, characterized in that: Micro telescopic parts (3-9) are provided at four working positions of the multi-station rack (3-3), and the micro telescopic parts (3-9) drive the corresponding laser cladding heads (3-4), ultrasonic flaw detectors (3-5), small grinders (3-6) and image acquisition devices (3-7) to move telescopically.

9. The laser cladding repair device for the main shaft of a large-displacement pump according to claim 1, characterized in that: Line clamps (12) for limiting a number of pairs of pipelines (11) are provided on the support frame (2).

Images