A powder preheating delivery device for laser cladding

Abstract

The utility model relates to a powder preheating conveying device for laser cladding, including equipment cabinet, support frame, storage jar, conveying assembly and transmission pipeline, the storage jar passes through support frame and installs on the equipment cabinet, the conveying assembly is connected in the bottom of storage jar, transmission pipeline is connected in the outside of conveying assembly, the electric heating wire is wound in the outside of transmission pipeline, the powder preheating conveying device for laser cladding, transmission pipeline adopts brass material, has good heat conductivity, can quickly transmit the heat generated by electric heating wire to powder, the electric heating wire helical shape is embedded in the helical groove of transmission pipeline outside, prolongs the heating path of powder, makes powder heat more evenly, effectively improves the preheating effect, and preheats the powder, reduces the temperature difference between powder and matrix, thereby reduces the thermal stress generated in the cladding process, effectively inhibits the generation of cladding layer crack, pore and other defects.

Description

Technical Field

[0001] This utility model relates to the field of powder conveying technology, specifically to a powder preheating and conveying device for laser cladding. Background Technology

[0002] Laser cladding technology, as an important surface modification technology, involves fusing metal or non-metal powders with specific properties onto the surface of a substrate under the action of a laser beam, forming a dense coating that is metallurgically bonded to the substrate. This significantly improves the surface hardness, wear resistance, corrosion resistance, and other properties of the substrate, and is widely used in many fields such as machinery manufacturing, aerospace, and automotive industries.

[0003] In existing laser cladding processes, powder preheating is one of the key steps affecting cladding quality and efficiency. However, most current laser cladding equipment lacks dedicated devices for preheating powder, directly feeding room-temperature powder into the cladding area. This approach has several drawbacks:

[0004] On the one hand, after room temperature powder enters the laser cladding area, it needs to absorb a large amount of laser energy to raise the temperature to the melting point. This not only leads to a significant reduction in the utilization rate of laser energy and prolongs the cladding time, but also reduces the efficiency of powder cladding.

[0005] On the other hand, due to the large temperature difference between the powder and the substrate, large thermal stress is easily generated during the cladding process, which leads to defects such as cracks and pores in the cladding layer, seriously affecting the quality and performance stability of the cladding layer. As industrial production places increasingly higher demands on the precision, efficiency and quality of laser cladding technology, developing a device that can effectively preheat and stably transport powder has become an urgent technical problem to be solved. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a powder preheating and conveying device for laser cladding, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a powder preheating and conveying device for laser cladding, comprising an equipment cabinet, a support frame, a storage tank, a conveying assembly, and a transmission pipeline;

[0008] The storage tank is mounted on the equipment cabinet via a support frame, the conveying assembly is connected to the bottom of the storage tank, and the transmission pipeline is connected to the outside of the conveying assembly;

[0009] Heating wires are wound around the outside of the transmission pipe. The heating wires are spirally distributed. Corresponding to the heating wires, spiral grooves adapted to the heating wires are formed on the outside of the transmission pipe. The heating wires are embedded in the spiral grooves.

[0010] A protective assembly is also provided on the outside of the transmission pipeline. The protective assembly includes two protective covers, which are respectively attached to the front and rear sides of the outer surface of the transmission pipeline and are connected by bolts.

[0011] Furthermore, the transmission pipe is made of brass.

[0012] Furthermore, the protective cover is made of ceramic fiber.

[0013] Furthermore, the conveying assembly includes a vertical pipe installed at the bottom of the storage tank, the vertical pipe communicating with the storage tank, and the transmission pipe communicating laterally with the outside of the vertical pipe;

[0014] A rotating shaft is rotatably connected to the inner bottom wall of the vertical pipe via a bearing. A spiral blade with clearance fit is provided on the outer side of the rotating shaft inside the vertical pipe. The top end of the rotating shaft extends into the interior of the storage tank. A motor with its output end connected to the rotating shaft is also provided at the bottom of the vertical pipe. At least two crushing components are provided on the outer side of the rotating shaft.

[0015] Furthermore, one of the crushing components includes a collar sleeved on the outside of the rotating shaft, and at least two crushing rollers are disposed on the outside of the collar.

[0016] Furthermore, the number of the crushing rollers is three, and they are arranged in a ring array on the outside of the collar.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] 1. The powder preheating and conveying device for laser cladding uses brass for its transmission pipe, which has good thermal conductivity and can quickly transfer the heat generated by the heating wire to the powder. The heating wire is spirally embedded in the spiral groove on the outside of the transmission pipe, which extends the heating path of the powder and makes the powder more uniformly heated, effectively improving the preheating effect. By preheating the powder, the temperature difference between the powder and the substrate is reduced, thereby reducing the thermal stress generated during the cladding process and effectively suppressing the generation of defects such as cracks and pores in the cladding layer.

[0019] 2. The powder preheating and conveying device for laser cladding has a crushing component in the conveying assembly that can effectively break up agglomerated powder, prevent powder blockage, and ensure smooth powder feeding. The protective cover is made of ceramic fiber, which has excellent heat insulation performance and can effectively reduce heat loss to the surrounding environment, so that more of the heat generated by the heating wire can be used for powder preheating, thus improving the thermal energy utilization rate. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a partial structural diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the conveying component structure of this utility model.

[0024] In the diagram: 1. Equipment cabinet; 2. Support frame; 3. Storage tank; 4. Conveying assembly; 401. Vertical pipe; 402. Rotating shaft; 403. Spiral blade; 404. Collar; 405. Crushing roller; 5. Transmission pipe; 501. Protective cover; 6. Heating wire; 7. Spiral groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This embodiment provides a powder preheating and conveying device for laser cladding, used to preheat the powder required for cladding during the conveying process.

[0027] Specifically, it includes an equipment cabinet 1, a support frame 2, a storage tank 3, a conveying assembly 4, and a transmission pipe 5; the storage tank 3 is mounted on the equipment cabinet 1 via the support frame 2, the conveying assembly 4 is connected to the bottom of the storage tank 3, and the transmission pipe 5 is connected to the outside of the conveying assembly 4; an electric heating wire 6 is wound around the outside of the transmission pipe 5, the electric heating wire 6 is distributed in a spiral shape, and a spiral groove 7 adapted to the electric heating wire 6 is opened on the outside of the transmission pipe 5, and the electric heating wire 6 is embedded in the spiral groove 7.

[0028] To ensure the heat conduction effect of the transmission pipe 5, in this embodiment, the transmission pipe 5 is preferably made of brass.

[0029] In actual setup, the heating wire 6 is spirally embedded in the spiral groove 7 on the outside of the transmission pipe 5. This connection method allows the heating wire 6 to fit tightly with the transmission pipe 5, effectively increasing the contact area between the transmission pipe 5 and the heating wire 6, while transferring heat to the transmission pipe 5, thereby preheating the powder in the pipe. The spiral distribution can extend the heating path of the powder in the transmission pipe 5, making the powder heat up more evenly and improving the preheating effect.

[0030] Furthermore, a protective assembly is provided on the outside of the transmission pipe 5. The protective assembly includes two protective covers 501, which are respectively attached to the front and rear sides of the outer surface of the transmission pipe 5 and are connected by bolts.

[0031] In actual installation, two protective covers 501 are bolted to the front and rear sides of the outer surface of the transmission pipe 5, enclosing the heating wire 6 inside. This not only protects the heating wire 6 from damage by external factors, but also effectively reduces heat loss to the surrounding environment, improves heat energy utilization, and allows the powder in the transmission pipe 5 to maintain a relatively stable preheating temperature.

[0032] Furthermore, the protective cover 501 is made of ceramic fiber, which has excellent heat insulation performance and can effectively reduce the loss of heat to the surrounding environment, so that more of the heat generated by the heating wire 6 can be used for powder preheating, thus improving the thermal energy utilization rate.

[0033] Specifically, in order to perform the function of powder transfer, the conveying component 4 in this embodiment includes a vertical pipe 401 installed vertically at the bottom of the storage tank 3, the vertical pipe 401 is connected to the storage tank 3, and the transmission pipe 5 is connected laterally to the outside of the vertical pipe 401.

[0034] A rotating shaft 402 is rotatably connected to the inner bottom wall of the vertical pipe 401 via a bearing. A spiral blade 403 with clearance fit is provided on the outer side of the rotating shaft 402 inside the vertical pipe 401. The top end of the rotating shaft 402 extends into the interior of the storage tank 3. A motor with its output end connected to the rotating shaft 402 is also provided at the bottom of the vertical pipe 401. At least two crushing components are provided on the outer side of the rotating shaft 402.

[0035] In detail, one of the crushing components includes a collar 404 sleeved on the outside of the rotating shaft 402, and at least two crushing rollers 405 are provided on the outside of the collar 404. The number of crushing rollers 405 is three, and they are distributed in a ring array on the outside of the collar 404.

[0036] In actual use, when the motor is working, it can drive the rotating shaft 402 to rotate inside the vertical tube 401. The spiral blade 403 is set on the outside of the rotating shaft 402 and is in clearance fit with the inside of the vertical tube 401. The rotation of the rotating shaft 402 drives the spiral blade 403 to rotate, thereby pushing the powder in the vertical tube 401 downward. At the same time, the crushing component is sleeved on the outside of the rotating shaft 402. As the rotating shaft 402 rotates, the crushing roller 405 can crush the clumps of powder that fall into the vertical tube 401, prevent powder blockage, and ensure smooth powder feeding.

[0037] In actual operation, the powder falling into the vertical tube 401 may clump. At this time, the motor drives the rotating shaft 402 to rotate, which in turn drives the crushing component sleeved on the outside of the rotating shaft 402 to rotate. During the rotation, the crushing roller 405 squeezes and impacts the clumped powder, crushing it into fine particles to ensure the flowability of the powder.

[0038] In actual use, the crushed powder is pushed downwards by the spiral blade 403. Since the transmission pipe 5 is horizontally connected to the outside of the vertical pipe 401, when the powder is pushed to the inlet of the transmission pipe 5, it enters the transmission pipe 5. In the transmission pipe 5, the heating wire 6 embedded in the spiral groove 7 is energized and heats up. The heat is transferred to the powder inside the transmission pipe 5 through the pipe wall, preheating the powder. Because the heating wire 6 is spirally distributed, the powder will travel a longer heating path when moving in the transmission pipe 5, thus achieving uniform preheating. The protective cover 501 made of ceramic fiber wraps around the outside of the transmission pipe 5 to reduce heat loss and maintain a stable preheating temperature. Finally, the preheated powder continues to move forward in the transmission pipe 5 and is eventually transported to the laser cladding area, completing the powder preheating and transport process.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder preheating and conveying device for laser cladding, characterized in that: it comprises a device cabinet (1), a support frame (2), a storage tank (3), a conveying assembly (4) and a transmission pipeline (5); the storage tank (3) is installed on the device cabinet (1) through the support frame (2), the conveying assembly (4) is communicated at the bottom of the storage tank (3), and the transmission pipeline (5) is communicated outside the conveying assembly (4); an electric heating wire (6) is wound outside the transmission pipeline (5), the electric heating wire (6) is distributed in a spiral shape, corresponding to the electric heating wire (6), a spiral groove (7) matched with the electric heating wire (6) is formed outside the transmission pipeline (5), and the electric heating wire (6) is embedded in the inside of the spiral groove (7); a protection assembly is further arranged outside the transmission pipeline (5), the protection assembly comprises two protection covers (501), the two protection covers (501) are respectively attached to the front and rear sides of the outer surface of the transmission pipeline (5), and the two protection covers (501) are connected through bolts. The transmission pipeline (5) is made of brass. The protection cover (501) is made of ceramic fiber. The conveying assembly (4) comprises a vertical pipe (401) vertically installed at the bottom end of the storage tank (3), the vertical pipe (401) is communicated with the storage tank (3), and the transmission pipeline (5) is transversely communicated outside the vertical pipe (401); a rotating shaft (402) is rotatably connected to the inner bottom wall of the vertical pipe (401) through a bearing, a spiral blade (403) is arranged outside the rotating shaft (402) and gap-fitted in the inside of the vertical pipe (401), the top end of the rotating shaft (402) extends into the inside of the storage tank (3), a motor is further arranged at the bottom of the vertical pipe (401) and drivingly connected with the rotating shaft (402), and at least two crushing assemblies are arranged outside the rotating shaft (402).

2. A powder preheating delivery device for laser cladding according to claim 1, characterized in that: One of the crushing assemblies comprises a sleeve ring (404) sleeved outside the rotating shaft (402), and at least two crushing rollers (405) are arranged outside the sleeve ring (404).

3. The powder preheating delivery device for laser cladding of claim 1, wherein: The number of the crushing rollers (405) is three, and the crushing rollers (405) are arranged in an annular array outside the sleeve ring (404).

4. The powder preheating delivery device for laser cladding of claim 1, wherein: ​ ​ 5. A powder preheating delivery device for laser cladding according to claim 4, characterized in that: ​ 6. A powder preheating delivery device for laser cladding according to claim 5, characterized in that: ​

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