Cooling structure for transmission part of selective laser melting equipment

Abstract

The utility model relates to the technical field of heat dissipation and cooling of transmission parts, in particular to a cooling structure for a transmission part of selective laser melting equipment, which comprises a plate body used for leading out heat of the transmission part, and a flow channel groove which is provided with recesses on one surface and is fully distributed on the plate body; a cooling medium circularly flows in an inner cavity of the pipeline, the pipeline is mounted in the flow channel groove of the plate body, a welding material part is arranged in a gap between the pipeline and the flow channel groove, the welding material part is filled through welding, and the upper surface of the welding material part is flush with the upper surface of the plate body; the cooling structure is used for solving the technical problems of low cooling efficiency and non-uniform cooling effect of a cooling structure for a transmission part of selective laser melting equipment in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation and cooling of a transmission part, in particular to a cooling structure for a transmission part of laser selective melting equipment. Background Art

[0002] Laser selective melting is a metal additive manufacturing technology that uses a high-energy laser beam to irradiate metal powder, causing it to melt and accumulate layer by layer to produce complex metal parts. During the laser selective melting process, the transmission part rotates at high speed to generate high temperatures, which require timely cooling and heat dissipation, otherwise it will easily affect the movement accuracy of the transmission part. The cooling structures currently used generally have poor heat dissipation effects and complex processing. Some of them have machined cooling water grooves on the plate walls that need heat dissipation, and then use sealing to circulate cooling water in the grooves to dissipate heat. This solution can achieve the purpose of heat dissipation to a certain extent, but at the same time, the requirements for groove design and sealing are relatively high, and the complex structure leads to high production process costs.

[0003] The announcement number is CN221151819U, and the name is a new patent for a heat dissipation device, which includes a base plate, a pipe and a cover plate. The base plate includes a first surface, and the first surface has a receiving groove formed by stamping. The pipe is arranged in the receiving groove. The cover plate is arranged on the first surface and covers the pipe, which solves the sealing problem to a certain extent, but there are still many shortcomings: ① Low cooling efficiency: Since the pipe is installed in the receiving groove of the base plate, there must be a gap between the pipe and the receiving groove, and the thermal conductivity of air is less than that of solid, so the heat exchange efficiency of the pipe depends largely on the contact area between the pipe and the receiving groove and the existing gap; ② Since the medium in the pipe continuously absorbs heat when circulating in the pipe, the temperature of the medium in the pipe becomes higher and higher, so the temperature difference between the inlet and outlet of the pipe is large, resulting in inconsistent heat dissipation and cooling effects in different areas. At present, there is an urgent need for a cooling structure for the transmission part of the laser selective melting equipment to solve the above technical problems. Utility Model Content

[0004] The utility model aims to provide a cooling structure for the transmission part of laser selective melting equipment, so as to solve the technical problems of low cooling efficiency and uneven cooling effect existing in the cooling structure for the transmission part of laser selective melting equipment in the related art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A cooling structure for a transmission part of a laser selective melting device, comprising:

[0007] The plate body is used to conduct heat from the transmission part, and one side of the plate body is provided with concave flow channel grooves that are all over the plate body;

[0008] The pipe has a cooling medium circulating in its inner cavity and is installed in the flow channel groove of the plate body. The gap between the pipe and the flow channel groove is provided with a welding material part, which is filled by welding and its upper surface is flush with the upper surface of the plate body.

[0009] Furthermore, the cross-sectional shape of the flow channel includes an arc-shaped bottom and a rectangular top, the width of the top is equal to the diameter of the bottom, and the distance H from the center of the arc-shaped bottom to the upper surface of the plate body and the radius R of the arc-shaped bottom have a dimensional relationship of: 1.5R<H≤2.5R.

[0010] Furthermore, the distribution shape of the flow channel grooves on the plate body is a series of bow-shaped curves, which includes a flow channel inlet and a flow channel outlet located on the end surface of the plate body.

[0011] Furthermore, the distribution shape of the flow channel grooves on the plate body is at least two parallel bow-shaped curves, which include a flow channel inlet and a flow channel outlet located on the end face of the plate body, and all the inlets of the parallel bow-shaped curves are connected to the flow channel inlet, and all the outlets of the parallel bow-shaped curves are connected to the flow channel outlet.

[0012] Furthermore, the flow channel inlet and the flow channel outlet are both located in the middle of the plate body.

[0013] Furthermore, the distribution shape of the flow channel grooves on the body is at least two parallel and equally spaced bow-shaped curves, and each parallel bow-shaped curve includes a flow channel inlet and a flow channel outlet.

[0014] Furthermore, an inlet temperature measuring locking valve is installed at the inlet of the pipe connected in parallel on each flow channel groove, and an outlet temperature measuring locking valve is installed at the outlet of the pipe.

[0015] Furthermore, the corners of the flow channel grooves are all rounded.

[0016] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0017] (1) The utility model provides a plate body, a flow channel groove is provided on the plate body, and the pipe is installed in the flow channel groove by welding. At the same time, the pipe and the flow channel groove are filled with welding material so that the surface of the welding material is flush with the surface of the plate body. The pipe can be fully fixed, and the gap between the flow channel groove and the pipe can be fully filled by the high-temperature melting of the welding material during welding, thereby maximizing the contact area between the pipe and the plate body. Since the thermal conductivity of the solid is greater than the thermal conductivity of the air, the heat exchange effect between the pipe and the plate body is greatly improved, and the cooling efficiency is effectively improved;

[0018] (2) The utility model designs the cross-sectional shape of the flow channel groove and defines the size relationship between the bottom and the top of the flow channel groove, thereby ensuring that the pipe and the flow channel groove are easy to install and the amount of welding materials used can be reduced as much as possible. In addition, the pipe can be fully fixed to prevent the transmission part from vibrating for a long time during operation, which may cause a gap between the pipe and the flow channel groove;

[0019] (3) The utility model provides a plurality of parallel flow channels to share a flow channel outlet and a flow channel inlet, which is conducive to realizing the heat exchange of the cooling medium at different positions of the body at the same time, avoiding the conventional technology that the cooling medium temperature at the flow channel outlet is too high due to the excessive length of the pipeline, thereby reducing the cooling effect, and is conducive to ensuring the uniformity of the cooling effect distribution of the plate body;

[0020] (4) The utility model sets a plurality of parallel flow channel grooves to respectively set the flow channel inlet and the flow channel outlet, and with the help of temperature measuring locking valve, it is conducive to individually controlling the on-off of each pipeline in the flow channel groove, and it is conducive to selecting the on-off of the cooling medium in each pipeline according to actual needs, thereby reducing the operating cost as much as possible under the premise of ensuring cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a main schematic diagram of the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of Example 2 of the utility model;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of Example 3 of the utility model.

[0026] In the figure, 100 is a plate; 101 is a flow channel inlet; 102 is a flow channel groove; 103 is a flow channel outlet;

[0027] 200, pipeline;

[0028] 300, welding materials department;

[0029] 400. Cooling medium. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0032] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0033] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0034] In the description of this application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. The following is a further explanation of the present invention in conjunction with the accompanying drawings and embodiments.

[0036] In order to solve the limitations of the prior art, this embodiment provides a technical solution, and the technical solution of the utility model is further described below in conjunction with the drawings and embodiments.

[0037] The utility model is aimed at the transmission part of the laser selective melting equipment, which is prone to high temperature during operation. If the high temperature cannot be cooled and dissipated in time, it is very easy to affect the running accuracy of the transmission part, thereby affecting the accuracy of product production and processing. In the prior art, the plate wall of the transmission part is mainly processed to form a cooling water tank and circulating cooling water is introduced to dissipate heat and cool, but this structure has high requirements for sealing, so the production process and production cost are relatively high. Other cooling structures disclosed in the related art also have the problems of poor cooling effect and low cooling efficiency.

[0038] Example 1

[0039] See attached Figure 1-3 A cooling structure for the transmission part of a laser selective melting device comprises: a plate body 100, which is used to export the heat of the transmission part, and one side of the plate body 100 is provided with a concave flow channel 102 which is covered with the plate body 100. Here, the plate body 100 is the wall plate of the transmission part, and generally adopts an aluminum plate, and the thermal conductivity of the aluminum plate is relatively high. Here, the processing method of the flow channel 102 is a pre-processing method; a pipe 200, in which a cooling medium 400 circulates in the inner cavity and is installed in the flow channel 102 of the plate body 100. The gap between the pipe 200 and the flow channel 102 is provided with a welding material part 300, and the welding material part 300 is filled by welding and its upper surface is flush with the upper surface of the plate body 100. It can be understood here that the pipe 200 is made of metal, preferably a copper pipe, which is not easy to corrode and is resistant to high temperature and high pressure. The flowing medium in the copper tube can be cooling water or other flowing liquids. The formation of the welding material part 300 is mainly through brazing to melt the welding material at high temperature so that the welding material is filled in the gap between the pipe 200 and the flow channel 102. The flushing method here is mainly formed by flat grinding after welding. In this way, there is no need to install a cover plate on the plate body 100, which saves equipment cost and process flow. A flow channel groove 102 is provided on the plate body 100, and the pipe 200 is installed in the flow channel groove 102 by welding. At the same time, the pipe 200 and the flow channel groove 102 are filled with welding material so that the surface of the welding material portion 300 is flush with the surface of the plate body 100, so that the pipe 200 can be fully fixed, and at the same time, the gap between the flow channel groove 102 and the pipe 200 can be fully filled with the help of high-temperature melting of the welding material during welding, thereby maximizing the contact area between the pipe 200 and the plate body 100. Because the thermal conductivity of the solid is greater than the thermal conductivity of the air, the heat exchange effect between the pipe 200 and the plate body 100 is greatly improved, and the cooling efficiency is effectively improved.

[0040] See attached Figure 2 and 3The cross-sectional shape of the flow channel 102 includes an arc-shaped bottom and a rectangular top, and the width of the top is equal to the diameter of the bottom. The main purpose of the arc-shaped bottom design here is to facilitate a larger contact area with the pipe 200, while also saving the cost of welding material filling. The size relationship between the distance H between the center of the arc-shaped bottom and the upper surface of the plate body 100 and the radius R of the arc-shaped bottom is: 1.5R<H≤2.5R. It can be understood here that the optimal choice is H=2R. By designing the cross-sectional shape of the flow channel 102 and limiting the size relationship between the bottom and the top of the flow channel 102, it can ensure that the pipe 200 and the flow channel 102 are easy to install, and at the same time, the amount of welding materials used can be reduced as much as possible, and the pipe 200 can be fully fixed to prevent the transmission part from vibrating for a long time during operation, resulting in a gap between the pipe 200 and the flow channel 102. The distribution shape of the flow channel groove 102 on the plate body 100 is a series of bow-shaped curves. The bow-shaped curve here can be understood as: a number of parallel grooves are connected in series end to end, and the corners of the flow channel groove 102 are rounded at the end connection. The advantage of using rounded corners is that it reduces the resistance of the cooling medium 400 when flowing in the pipeline 200, and it is not easy to form four corners to cause impurities to accumulate and affect the smooth flow of the pipeline 200. It includes a flow channel inlet 101 and a flow channel outlet 103 located on the end face of the plate body 100, and the flow inlet and the flow channel outlet 103 are both located on the end face of the plate body 100.

[0041] Example 2

[0042] See attached Figure 4 , which is different from Example 1, is that the distribution shape of the flow channel groove 102 on the plate body 100 is two parallel bow-shaped curves, which include a flow channel inlet 101 and a flow channel outlet 103 located on the end face of the plate body 100, and the inlets of all parallel bow-shaped curves are connected to the flow channel inlet 101, and the outlets of all parallel bow-shaped curves are connected to the flow channel outlet 103. It can be understood here that the beginning and end of the flow channel groove 102 of each bow-shaped curve are connected, and the external circulating medium flows in from the flow channel inlet 101, flows in along multiple pipes 200, and then flows out through the flow channel outlet 103, thereby circulating. The flow channel inlet 101 and the flow channel outlet 103 are both located in the middle of the plate body 100. By setting up multiple parallel flow channel grooves 102 to share a flow channel outlet 103 and a flow channel inlet 101, it is beneficial to realize heat exchange of the cooling medium 400 along different positions of the main body at the same time, avoiding the conventional technology in which the temperature of the cooling medium 400 at the flow channel outlet 103 is too high due to the excessive length of the pipeline 200, thereby reducing the cooling effect, and is beneficial to ensuring the uniformity of the distribution of the cooling effect of the plate body 100.

[0043] Example 3

[0044] See attached Figure 5, which is different from Example 1, is that the distribution shape of the flow channel groove 102 on the main body is two parallel and equally spaced bow-shaped curves, each of which includes a flow channel inlet 101 and a flow channel outlet 103. It can be understood here that the two parallel bow-shaped curves are not connected to each other, and each circulates the cooling medium 400 through a separate flow channel inlet 101 and flow channel outlet 103. The parallel pipes 200 on each flow channel groove 102 are located at the flow channel inlet 101 and an inlet temperature measuring locking valve is installed. The pipes 200 are located at the flow channel outlet 103 and an outlet temperature measuring locking valve is installed. By setting a plurality of parallel flow channel grooves 102 and setting the flow channel inlet 101 and the flow channel outlet 103 respectively, with the help of the temperature measuring locking valve, it is beneficial to individually control the on-off of each pipe 200 in the flow channel groove 102, and it is beneficial to select the on-off of the cooling medium 400 in each pipe 200 according to actual needs, thereby reducing the operating cost as much as possible under the premise of ensuring the cooling efficiency. When the temperature of the transmission part is low, one pipe 200 can be selected to circulate the cooling medium 400 for cooling and heat dissipation. When the temperature of the transmission part is high, all pipes 200 can be selected to circulate the cooling medium 400 at the same time, or the circulation direction of the cooling medium 400 in each pipe 200 can be selected to be different, which can better ensure the uniformity of cooling of the plate body 100.

[0045] When the structure is installed, the plate body 100 is first pre-processed to form the flow channel groove 102, and after the shape of the pipeline 200 is matched with the flow channel groove 102, the pipeline 200 is placed in the flow channel groove 102, and then the pipeline 200 and the flow channel groove 102 are fully welded or staged fully welded by brazing, so as to complete the installation of the structure, which has a simple structure and a simple installation process. When in use, when the temperature of the transmission part is low, only one pipeline 200 needs to be opened to circulate the cooling medium 400 for heat dissipation and cooling. When the temperature of the transmission part rises, multiple pipelines 200 can be opened at the same time to circulate the cooling medium 400 for cooling and heat dissipation. By welding and filling welding materials, the contact area between the body and the pipeline 200 is greatly increased, thereby improving the cooling efficiency. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the present invention will not be limited to the embodiments shown herein but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling structure for the transmission part of a laser selective melting device, characterized in that: include: The plate body (100) is used to conduct heat away from the transmission part, and one side of the plate body (100) is provided with a concave flow channel groove (102) which covers the entire plate body (100); A pipe (200) is installed in a flow channel (102) of a plate body (100) and has a cooling medium (400) circulating in its inner cavity. A welding material portion (300) is provided in a gap between the pipe (200) and the flow channel (102). The welding material portion (300) is filled by welding and its upper surface is flush with the upper surface of the plate body (100).

2. A cooling structure for the transmission part of laser selective melting equipment according to claim 1, characterized in that: The cross-sectional shape of the flow channel groove (102) comprises an arc-shaped bottom and a rectangular top, the width of the top is equal to the diameter of the bottom, and the dimensional relationship between the distance H between the center of the arc-shaped bottom and the upper surface of the plate body (100) and the radius R of the arc-shaped bottom is: 1.5R<H≤2.5R.

3. A cooling structure for the transmission part of laser selective melting equipment according to claim 2, characterized in that: The distribution shape of the flow channel grooves (102) on the plate body (100) is a series of bow-shaped curves, which include a flow channel inlet (101) and a flow channel outlet (103) located on the end surface of the plate body (100).

4. A cooling structure for the transmission part of laser selective melting equipment according to claim 2, characterized in that: The distribution shape of the flow channel grooves (102) on the plate body (100) is at least two parallel bow-shaped curves, which include a flow channel inlet (101) and a flow channel outlet (103) located on the end surface of the plate body (100), and the inlets of all parallel bow-shaped curves are connected to the flow channel inlet (101), and the outlets of all parallel bow-shaped curves are connected to the flow channel outlet (103).

5. A cooling structure for the transmission part of laser selective melting equipment according to claim 4, characterized in that: The flow channel inlet (101) and the flow channel outlet (103) are both located in the middle of the plate body (100).

6. The cooling structure for the transmission part of the laser selective melting equipment according to claim 2, characterized in that: The distribution shape of the flow channel grooves (102) on the body is at least two parallel and equally spaced bow-shaped curves, and each parallel bow-shaped curve comprises a flow channel inlet (101) and a flow channel outlet (103).

7. A cooling structure for the transmission part of laser selective melting equipment according to claim 6, characterized in that: The pipe (200) connected in parallel on each flow channel groove (102) is provided with an inlet temperature measuring locking valve at the flow channel inlet (101), and the pipe (200) is provided with an outlet temperature measuring locking valve at the flow channel outlet (103).

8. A cooling structure for the transmission part of a laser selective melting device according to any one of claims 1 to 7, characterized in that: The corners on the flow channel groove (102) are all rounded.

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