阅读说明：本技术 一种用于降低增材制造层粗糙度的装置 (Device for reducing roughness of additive manufacturing layer ) 是由 张喆玉 杨林 李晓波 何华 马明星 杨倩倩 鲁志敏 于 2020-05-15 设计创作，主要内容包括：本发明提供了一种用于降低增材制造层粗糙度的装置,包括敲击组件,所述敲击组件包括“L”型的敲击连杆,所述敲击连杆的横杆的末端设有敲击头,且所述横杆的末端设有腔体。装置还包括降温结构,降温结构经管道与腔体连通,降温结构内设有冷却液,冷却液在降温结构与腔体之间循环,对敲击头及横杆的末端降温。本发明通过降温结构对敲击头及敲击连杆的横杆末端进行降温,显著降低装置敲击部位的温度,减少零件损耗,提高装置的使用寿命。(The invention provides a device for reducing the roughness of an additive manufacturing layer, which comprises a knocking component, wherein the knocking component comprises an L-shaped knocking connecting rod, a knocking head is arranged at the tail end of a cross rod of the knocking connecting rod, and a cavity is arranged at the tail end of the cross rod. The device still includes the cooling structure, and the cooling structure is equipped with the coolant liquid through pipeline and cavity intercommunication in the cooling structure, and the coolant liquid circulates between cooling structure and cavity, and the terminal cooling of knocking head and horizontal pole. According to the invention, the tail ends of the knocking heads and the cross rod of the knocking connecting rod are cooled through the cooling structure, so that the temperature of the knocking part of the device is obviously reduced, the loss of parts is reduced, and the service life of the device is prolonged.)

1. An apparatus for reducing roughness of an additive manufactured layer, characterized by: the device comprises a knocking component, wherein the knocking component comprises an L-shaped knocking connecting rod, a knocking head is arranged at the tail end of a cross rod of the knocking connecting rod, and a cavity is arranged at the tail end of the cross rod;

the device further comprises a cooling structure, the cooling structure is communicated with the cavity through a pipeline, cooling liquid is arranged in the cooling structure, and the cooling liquid circulates between the cooling structure and the cavity to cool the knocking head and the tail end of the cross rod.

2. An apparatus for reducing roughness of an additive manufactured layer according to claim 1, wherein: the cavity comprises a first cavity and a second cavity, and the first cavity and the second cavity are respectively positioned at two sides of the tail end of the cross rod;

and a liquid inlet and a liquid outlet are formed in the first cavity and the second cavity and on the surface contacted with the cross rod.

3. An apparatus for reducing roughness of an additive manufactured layer according to claim 2, wherein: be equipped with inlet channel on the end of horizontal pole, first cavity reaches be equipped with the inlet on the second cavity respectively, just inlet channel with the inlet intercommunication, the liquid outlet with cooling structure intercommunication.

4. An apparatus for reducing roughness of an additive manufactured layer according to claim 3, wherein: the tail end of the cross rod is also provided with a liquid outlet channel, one end of the liquid outlet channel is communicated with the liquid outlet, and the other end of the liquid outlet channel is communicated with the cooling structure.

5. An apparatus for reducing roughness of an additive manufactured layer according to claim 4, wherein: the liquid inlet channel and the liquid outlet channel are arranged in the middle of the tail end of the cross rod and comprise blind holes which are close to the cross rod and are vertically and downwards arranged, first through holes are vertically formed in the tail ends of the blind holes and the blind holes, and two ends of each first through hole are communicated with the first cavity and the second cavity respectively.

6. An apparatus for reducing roughness of an additive manufactured layer according to claim 1, wherein: the cooling structure comprises a cooling liquid storage tank and a pump, wherein the cooling liquid is arranged in the cooling liquid storage tank, and the pump is used for enabling the cooling liquid to circulate between the cooling liquid storage tank and the cavity.

7. An apparatus for reducing roughness of an additive manufactured layer according to claim 1, wherein: the knocking head is made of high-temperature resistant materials.

8. An apparatus for reducing roughness of an additive manufactured layer according to claim 1, wherein: and a second through hole is formed at the joint of the vertical rod and the transverse rod of the knocking connecting rod, and the fixing shaft penetrates through the second through hole to fix the knocking connecting rod on a supporting frame of the device.

9. An apparatus for reducing roughness of an additive manufactured layer according to claim 1, wherein: the device also comprises a driving assembly, wherein one end of the driving assembly is fixed on a supporting frame of the device, the other end of the driving assembly is connected with a jacking piece, and the jacking piece is positioned on the side surface of the vertical rod;

the driving assembly is used for driving the jacking piece to enable the jacking piece to extrude the vertical rod, the vertical rod deviates leftwards or rightwards, and the cross rod drives the knocking head to move upwards or downwards to hit the additive manufacturing layer around the heat source.

10. An apparatus for reducing roughness of an additive manufactured layer according to claim 9, wherein: the device includes the reset structure that the level set up, reset structure's one end is fixed on the braced frame of device, reset structure's the other end with strike the third through hole fixed connection of the montant upper end of connecting rod.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to a device for reducing the roughness of an additive manufacturing layer.

Background

With the continuous development of industrial technology, new manufacturing technology is generated, such as additive manufacturing (3D printing) technology, which is a bottom-up manufacturing method, in which materials are manufactured into solid parts by layered manufacturing and layer-by-layer accumulation, so that the processing procedures of the parts can be greatly reduced, and the processing cycle of the parts can be shortened. The additive manufacturing strengthening technology is characterized in that a molten pool is formed on a metal substrate through a high-energy heat source (such as laser, plasma, electric arc and the like), and meanwhile, specific strengthening materials such as composite strengthening metal powder, welding wires and the like are fed into the molten pool, so that a strengthening layer with specific properties (such as wear resistance, corrosion resistance, fatigue resistance and the like) is formed on the surface of the substrate.

In the manufacturing industry, the requirements on the surface smoothness and the roughness of parts are high, however, the roughness and the surface smoothness of an additive manufacturing layer manufactured by the existing additive manufacturing technology cannot meet the requirements of the mechanical manufacturing industry, and corresponding machining work needs to be added to the parts manufactured by the additive manufacturing technology in the later period. At present, the traditional mode of reducing the roughness of the additive manufacturing layer is a turning or grinding process, but because the additive manufacturing layer usually adopts wear-resistant and corrosion-resistant materials, the strength is higher, the difficulty, the construction period and the like of subsequent machining can be increased, a special grinding device is sometimes required, the additive manufacturing cost is greatly increased, and the difficulty in popularization and application of the additive manufacturing technology is increased.

In view of the above, it is desirable to provide an apparatus capable of reducing roughness of an additive manufacturing layer during additive manufacturing, so as to solve the above problem.

Disclosure of Invention

The invention aims to solve the problems that the existing additive manufacturing layer is large in roughness and needs a subsequent special machining process, and provides a device for reducing the roughness of the additive manufacturing layer. This device can be when the vibration material disk reinforces, through hitting the vibration material disk layer of making continuously, can show the roughness that reduces the vibration material disk layer, reduces or even avoids the degree of difficulty, the time of follow-up machining, reduces the processing cost of product, is convenient for carry out further popularization to vibration material disk technique.

Meanwhile, when the additive manufacturing layer is continuously hit to reduce the roughness of the additive manufacturing layer, the temperature of the additive manufacturing layer is too high due to the extremely high temperature of a heat source in additive manufacturing, and the hitting part of the device is easily burnt, so that the hitting part of the device is subjected to high temperature resistance or temperature reduction treatment.

The technical scheme for realizing the purpose of the invention is as follows: the utility model provides a device for reducing additive manufacturing layer roughness, includes strikes the subassembly, strikes the subassembly and includes the striking connecting rod of "L" type, strikes the end of the horizontal pole of connecting rod and is equipped with and strikes the head, and the end of horizontal pole is equipped with the cavity.

The device still includes the cooling structure, and the cooling structure is equipped with the coolant liquid through pipeline and cavity intercommunication in the cooling structure, and the coolant liquid circulates between cooling structure and cavity, and the terminal cooling of knocking head and horizontal pole.

According to the invention, the cavity is arranged at the tail end of the cross rod of the knocking connecting rod, the cooling liquid is introduced into the cavity through the cooling structure, and the knocking connecting rod and the knocking head are cooled, so that the temperature of the knocking part of the device can be obviously reduced, the part loss is reduced, and the service life of the device is prolonged.

The cavity comprises a first cavity and a second cavity, the first cavity and the second cavity are respectively positioned at two sides of the tail end of the cross rod, and a liquid inlet and a liquid outlet are formed in the surfaces, contacting with the cross rod, of the first cavity and the second cavity. The tail end of the cross rod of the knocking connecting rod is clamped through the first cavity and the second cavity, so that the knocking connecting rod and the knocking head can be well cooled, and the cooling efficiency is improved.

Furthermore, a liquid inlet channel is arranged at the tail end of the cross rod, liquid inlets are respectively arranged on the first cavity and the second cavity, the liquid inlet channel is communicated with the liquid inlets, and the liquid outlets are communicated with the cooling structure. Liquid outlets on the first cavity and the second cavity are communicated with the cooling structure through pipelines respectively, so that the first cavity and the second cavity form an independent space to be controlled independently.

Furthermore, the tail end of the cross rod is also provided with a liquid outlet channel, one end of the liquid outlet channel is communicated with the liquid outlet, and the other end of the liquid outlet channel is communicated with the cooling structure. Through the arrangement of the liquid inlet channel and the liquid outlet channel on the tail end of the cross rod, the first cavity and the second cavity form a whole, so that the temperatures of two sides of the tail end of the cross rod are the same, and the quality uniformity of the additive manufacturing layer is ensured. Simultaneously, through set up inlet channel on the horizontal pole, the coolant liquid is through the passageway on the horizontal pole entering, and in the reentrant first cavity and the second cavity, at this moment, the coolant liquid can cool down to the inside of horizontal pole when getting into inlet channel, and the coolant liquid cools down to the outside of horizontal pole in reentrant first cavity and the second cavity, can improve the efficiency of horizontal pole cooling.

Preferably, the liquid inlet channel and the liquid outlet channel are both arranged in the middle of the tail end of the cross rod and comprise blind holes which are vertically and downwards arranged close to the cross rod, first through holes are vertically arranged at the tail ends of the blind holes and the blind holes, and two ends of each first through hole are respectively communicated with the first cavity and the second cavity.

Further, as an improvement of the cooling structure provided by the invention, the cooling structure comprises a cooling liquid storage tank and a pump, wherein cooling liquid is arranged in the cooling liquid storage tank, and the pump is used for enabling the cooling liquid to circulate between the cooling liquid storage tank and the cavity.

Further, as an improvement to the rapper assembly of the present invention, the heat source provides high energy to the additive strengthening layer to form a molten pool on the metal substrate as the additive strengthening layer is fabricated. Therefore, in order to avoid the high-temperature damage when the knocking head knocks the material increase strengthening layer to reduce the roughness of the material increase strengthening layer, the knocking head is made of high-temperature resistant materials. Preferably, the knocking head can be made of high-temperature-resistant alloy materials or non-metal materials.

Furthermore, as a further improvement of the device, a second through hole is further formed in the joint of the vertical rod and the cross rod of the knocking connecting rod, and the fixing shaft penetrates through the second through hole to fix the knocking connecting rod on a supporting frame of the device. The knocking connecting rod is fixed on the supporting frame through the fixing shaft, so that the vertical rod can drive the cross rod to move up and down when moving left and right under the action of external force, the knocking head can knock the additive manufacturing layer, and the roughness of the additive manufacturing layer is reduced.

Further, as a further improvement of the device of the invention, the device further comprises a driving assembly, one end of the driving assembly is fixed on a supporting frame of the device, the other end of the driving assembly is connected with a jacking piece, and the jacking piece is positioned on the side surface of the vertical rod. The driving assembly is used for driving the jacking piece to enable the jacking piece to extrude the vertical rod, the vertical rod deviates leftwards or rightwards, and the cross rod drives the knocking head to move upwards or downwards to hit the additive manufacturing layer around the heat source.

Preferably, as a further improvement of the device of the present invention, the device comprises a horizontally disposed reset structure, one end of the reset structure is fixed on the supporting frame of the device, and the other end of the reset structure is fixedly connected with the third through hole at the upper end of the vertical rod of the knocking connecting rod. The reset structure can enable the knocking component with the offset position to return to the right position quickly, and ensures that the knocking component can knock the material increase reinforcing layer around the heat source stably and continuously under the action of the driving component and the jacking piece.

Compared with the prior art, the invention has the beneficial effects that: the device can move continuously along with a heat source, and can remarkably reduce the integral roughness of the additive layer while finishing the additive process by continuously knocking the uncooled additive strengthening area at high frequency, reduce the subsequent processing time and cost, and achieve the effects of refining grains and improving the additive performance. Meanwhile, when the knocking head knocks the material increase strengthening area, the knocking head and the tail end of the cross rod of the knocking connecting rod are cooled through the cooling structure, so that the temperature of the knocking part of the device is obviously reduced, the loss of parts is reduced, and the service life of the device is prolonged.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below. It should be apparent that the drawings in the following description are only for illustrating the embodiments of the present invention or technical solutions in the prior art more clearly, and that other drawings can be obtained by those skilled in the art without any inventive work.

FIG. 1 is a schematic view of a strike link of an apparatus for reducing roughness of an additive manufactured layer of the present invention;

FIG. 2 is an enlarged view of example 1 of the present invention at A;

FIG. 3 is a schematic view of an apparatus for reducing roughness of an additive manufacturing layer according to the present invention;

wherein, 1, knocking the connecting rod; 101. a vertical rod; 102. a cross bar; 103. a fixed shaft; 104. a cavity; 1041. a first cavity; 1042. a second cavity; 2. a knocking head; 3. a support frame; 4. a drive assembly; 401. a driver; 402. a transmission member; 403. an eccentric wheel; 5. a jack-up member; 6. a rotating shaft; 7. a heat source; 8, an additive strengthening layer; 9. a reset structure; 10. a cooling structure; 11. a liquid inlet channel; 12. a liquid outlet channel; 13, blind holes; 14. a first through hole; 15. second through hole 16, third through hole.

Detailed Description

The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.