阅读说明：本技术 一种具备混粉功能的送粉系统 (Powder feeding system with powder mixing function ) 是由 周崇 李东杰 齐欢 于 2020-12-29 设计创作，主要内容包括：本发明涉及一种具备混粉功能的送粉系统,包括送粉盘及其顶面圆环状的电动滑轨,电动滑轨上设有送粉块和限位挡块；送粉块顶面设有送粉槽；送粉盘上方设有双送粉桶组件；双送粉桶组件包括扣合在送粉盘上的保护罩,保护罩顶面设有与其相连通的第一送粉桶和第二送粉桶,第一送粉桶和第二送粉桶的下方出口处分别设有第一电子流量阀和第二电子流量阀；送粉块可分别移动至第一送粉桶和/或第二送粉桶的下方出口处的下方。此送粉系统可通过双送粉桶组件实现异种粉末的混合,且混合比例可精确调节；混合质量高于常规混合手段；替代了传统的混粉和送粉两道工序,提高生产效率,降低成本；可实现粉末随用随混,无需提前混合过量粉末,避免粉末浪费。(The invention relates to a powder feeding system with a powder mixing function, which comprises a powder feeding disc and an electric sliding rail with a circular top surface, wherein a powder feeding block and a limit stop block are arranged on the electric sliding rail; the top surface of the powder feeding block is provided with a powder feeding groove; a double powder feeding barrel component is arranged above the powder feeding disc; the double powder feeding barrel component comprises a protective cover buckled on the powder feeding disc, a first powder feeding barrel and a second powder feeding barrel which are communicated with the protective cover are arranged on the top surface of the protective cover, and a first electronic flow valve and a second electronic flow valve are respectively arranged at the lower outlets of the first powder feeding barrel and the second powder feeding barrel; the powder feeding block can move to the lower part of the lower outlet of the first powder feeding barrel and/or the second powder feeding barrel respectively. The powder feeding system can realize the mixing of different powders through the double powder feeding barrel components, and the mixing proportion can be accurately adjusted; the mixing quality is higher than that of the conventional mixing means; the traditional two processes of powder mixing and powder feeding are replaced, the production efficiency is improved, and the cost is reduced; the powder can be mixed at any time without mixing excessive powder in advance, so that the powder waste is avoided.)

1. The powder feeding system with the powder mixing function is characterized by comprising a powder feeding disc (1), wherein a circular electric sliding rail (2) is arranged on the top surface of the powder feeding disc (1), and a slidable powder feeding block (3) and a fixed limit stop (4) are respectively arranged on the electric sliding rail (2); a powder feeding groove (5) is formed in the top surface of the powder feeding block (3); a double powder feeding barrel component is arranged above the powder feeding disc (1); the double powder feeding barrel assembly comprises a protective cover (6) buckled on a powder feeding disc (1), a first powder feeding barrel (7) and a second powder feeding barrel (8) which are communicated with the protective cover (6) are arranged on the top surface of the protective cover (6), and a first electronic flow valve (9) and a second electronic flow valve (10) which can adjust the powder output are respectively arranged at the lower outlets of the first powder feeding barrel (7) and the second powder feeding barrel (8); the powder conveying block (3) can move to the lower part of the lower outlet of the first powder conveying barrel (7) and/or the second powder conveying barrel (8) respectively.

2. The powder feeding system with the powder mixing function according to claim 1, wherein an inert gas pipeline (11) is arranged through the powder feeding disc (1) from bottom to top, one end of the inert gas pipeline (11) extends to a position near the upper part of the limit stop (4), the tail end of the inert gas pipeline is provided with an absorber (12), and the other end of the inert gas pipeline (11) is communicated with an external molten pool; when the powder feeding block (3) slides to the position of the limit stop (4), the adsorption range of the adsorber (12) is matched with the notch range of the powder feeding groove (5).

3. The powder feeding system with the powder mixing function as claimed in claim 2, wherein the electric slide rail (2), the first electronic flow valve (9), the second electronic flow valve (10) and the adsorber (12) are electrically connected to an external controller.

Technical Field

The invention relates to the technical field of powder feeding systems, in particular to a powder feeding system with a powder mixing function.

Background

Laser additive manufacturing techniques are an important component of laser processing techniques. The principle is that a powder feeding system is used for adding cladding materials into a laser melting pool, and a high-energy laser beam is used for melting the cladding materials and a thin layer on the surface of a base material together to form a metallurgically bonded cladding layer on the surface of the base material.

The powder feeding system is one of the core components of the technology, and the function of the powder feeding system is to convey the additive manufacturing raw materials into the molten pool according to the process requirements. Common raw materials are single powder, when mixed powder consisting of two kinds of powder needs to be melted, the powder is often required to be uniformly mixed in advance because the conventional powder feeding system does not have a powder mixing function, and then the mixed powder is conveyed into a laser molten pool through the powder feeding system.

In the prior art, two procedures of powder mixing and powder feeding are generally adopted to realize uniform conveying of heterogeneous powder to a molten pool. The process greatly affects the production efficiency and has high production cost; and the uniformity of the powder mixing process directly influences the quality of the final additive manufacturing workpiece.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a powder feeding system with a powder mixing function.

The invention is realized by the following technical scheme:

a powder feeding system with a powder mixing function comprises a powder feeding disc, wherein a circular electric slide rail is arranged on the top surface of the powder feeding disc, and a slidable powder feeding block and a fixed limit stop block are respectively arranged on the electric slide rail; the top surface of the powder feeding block is provided with a powder feeding groove; a double powder feeding barrel assembly is arranged above the powder feeding disc; the double powder feeding barrel assembly comprises a protective cover buckled on a powder feeding disc, a first powder feeding barrel and a second powder feeding barrel which are communicated with the protective cover are arranged on the top surface of the protective cover, and a first electronic flow valve and a second electronic flow valve which can adjust the powder output are respectively arranged at the lower outlets of the first powder feeding barrel and the second powder feeding barrel; the powder feeding block can move to the lower part of the lower outlet of the first powder feeding barrel and/or the second powder feeding barrel respectively.

According to the technical scheme, preferably, an inert gas pipeline penetrates through the powder feeding disc from bottom to top, one end of the inert gas pipeline extends to a position near the position above the limit stop, the tail end of the inert gas pipeline is provided with an adsorber, and the other end of the inert gas pipeline is communicated with an external molten pool; when the powder feeding block slides to the limit stop, the adsorption range of the adsorber is matched with the notch range of the powder feeding groove.

According to the technical scheme, preferably, the electric slide rail, the first electronic flow valve, the second electronic flow valve and the adsorber are electrically connected with an external controller.

The invention has the beneficial effects that:

1. the mixing of the heterogeneous powder can be realized through the double powder feeding barrel assembly, and the mixing proportion can be accurately adjusted;

2. after double-layer mixing of the two kinds of powder is realized in the powder feeding groove, the two kinds of powder are converged into the same air flow conveying pipeline, the double-layer powder is fully mixed under the action of high-speed air flow, and the mixing quality is higher than that of a conventional mixing means;

3. the powder feeding system replaces the traditional two processes of powder mixing and powder feeding, improves the production efficiency and reduces the cost;

4. the powder feeding system can realize that the powder is mixed along with use, and excessive powder does not need to be mixed in advance, so that the powder waste is avoided.

Drawings

Fig. 1 shows a schematic front view of an embodiment of the present invention.

In the figure: 1. a powder feeding disc; 2. an electric slide rail; 3. feeding the powder block; 4. a limit stop block; 5. a powder feeding groove; 6. a protective cover; 7. a first powder feeding barrel; 8. a second powder feeding barrel; 9. a first electronic flow valve; 10. a second electronic flow valve; 11. an inert gas line; 12. an adsorber.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1, the powder feeding system with powder mixing function of the present invention comprises a powder feeding disc 1, wherein a circular electric slide rail 2 is arranged on the top surface of the powder feeding disc 1, and a slidable powder feeding block 3 and a fixed limit stop 4 are respectively arranged on the electric slide rail 2; the top surface of the powder feeding block 3 is provided with a powder feeding groove 5 for containing powder; a separable double powder feeding barrel component is arranged above the powder feeding disc 1; the double powder feeding barrel component comprises a protective cover 6 buckled on the powder feeding disc 1, and a sealing ring can be additionally arranged between the protective cover 6 and the powder feeding disc 1; a first powder feeding barrel 7 and a second powder feeding barrel 8 which are communicated with the protection cover 6 are arranged on the top surface of the protection cover 6, a discharging hole is formed in the top of each of the first powder feeding barrel 7 and the second powder feeding barrel 8, and a powder barrel cover covers the discharging hole; a first electronic flow valve 9 and a second electronic flow valve 10 which can adjust the powder output are respectively arranged at the lower outlets of the first powder conveying barrel 7 and the second powder conveying barrel 8; the powder conveying block 3 can respectively move to the lower part of the lower outlet of the first powder conveying barrel 7 and/or the second powder conveying barrel 8, so that powder can be conveniently received.

According to the above technical solution, preferably, an inert gas pipeline 11 is provided from bottom to top through the powder feeding plate 1, and the rare gas is a gas corresponding to all group 0 elements in the periodic table of elements, and is also called as inert gas. They are colorless and odorless monatomic gases at normal temperature and pressure, and are difficult to chemically react. The rare gases are eight kinds in total, and they are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn, radioactive), (gas-o) (Og, radioactive, artificial element). The gas pipeline refers to a connecting pipeline between a gas cylinder and an instrument terminal, and generally comprises a gas switching device, a pressure reducing device, a valve, a pipeline, a filter, an alarm, a terminal box, a regulating valve and the like; the inert gas is difficult to react with the powder material chemically, so that unnecessary loss can be reduced; one end of the inert gas pipeline 11 extends to the position near the upper part of the limit stop 4, the tail end of the inert gas pipeline is provided with an absorber 12, and the other end of the inert gas pipeline 11 is communicated with an external molten pool; when the powder feeding block 3 slides to the limit stop 4, the adsorption range of the adsorber 12 is matched with the notch range of the powder feeding groove 5, so that a better adsorption effect is facilitated.

According to the technical scheme, preferably, the electric slide rail 2, the first electronic flow valve 9, the second electronic flow valve 10 and the adsorber 12 are electrically connected with a controller of an external control system of the laser cladding equipment.

The specific implementation mode is as follows:

a) and (6) assembling the system. The assembly method is as follows: the powder feeding system is connected with an external control system of laser cladding equipment, a powder feeding block 3 and a limit stop 4 are sequentially arranged on an electric slide rail 2 of a powder feeding disc 1, then a double powder feeding barrel assembly is assembled with the powder feeding disc 1, a powder feeding barrel cover is screwed after powder is filled, and an inert gas pipeline 11 is connected;

b) operating the control system, clicking a 'gas supply' button, and introducing inert gas to the powder supply system;

c) the operation control system clicks a 'powder feeding' button, the electric sliding rail 2 of the powder feeding disc 1 starts to operate, meanwhile, the first powder feeding barrel 7 and the second powder feeding barrel 8 start to discharge powder, the powder in the first powder feeding barrel 7 falls to the powder feeding block 3 to form a first layer of powder, the powder in the second powder feeding barrel 8 falls to the upper side of the first layer of powder to form a second layer of powder, and the first layer of powder and the second layer of powder are transferred to the position of the limit stop block 4 by the powder feeding block 3; an adsorber 12 connected with an inert gas pipeline 11 above the limit stop 4 sucks out the first layer powder and the second layer powder together and conveys the first layer powder and the second layer powder to an external molten pool;

d) in the above operation steps, according to the process requirements, the powder discharge amount of the first powder conveying barrel 7 and the second powder conveying barrel 8 can be adjusted through the first electronic flow valve 9 and the second electronic flow valve 10, so as to realize different proportion mixing of the two powders. For example, when the control system is operated and a "powder ratio" button is clicked, the powder output of the first powder delivery barrel 7 is set to be 70%, the powder output of the second powder delivery barrel 8 is set to be 30%, the control system drives the first electronic flow valve 9 and the second electronic flow valve 10 to complete the above-mentioned powder output adjustment, so as to realize that the ratio of the finally delivered mixed powder is: 70% powder 1+ 30% powder 2.

e) In the above operation steps, according to the process requirements, the mixed powder can be conveyed at different speeds by adjusting the running speed of the electric slide rail 2.

The invention has the beneficial effects that:

1. the mixing of the heterogeneous powder can be realized through the double powder feeding barrel assembly, and the mixing proportion can be accurately adjusted;

2. after double-layer mixing of the two kinds of powder is realized in the powder feeding groove, the two kinds of powder are converged into the same air flow conveying pipeline, the double-layer powder is fully mixed under the action of high-speed air flow, and the mixing quality is higher than that of a conventional mixing means;

3. the powder feeding system replaces the traditional two processes of powder mixing and powder feeding, improves the production efficiency and reduces the cost;

4. the powder feeding system can realize that the powder is mixed along with use, and excessive powder does not need to be mixed in advance, so that the powder waste is avoided.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.