A wide-band powder feeding nozzle for adjusting powder concentration distribution

Abstract

The present invention belongs to the field of laser cladding, and specifically relates to a broadband powder feeding nozzle for adjusting powder concentration distribution, comprising a nozzle body, a powder flow channel for feeding powder is arranged on the nozzle body, a spoiler mechanism is arranged on the nozzle body, the spoiler mechanism comprises a spoiler and a spoiler driver, the position of the spoiler corresponds to the powder flow channel, and the spoiler driver is used to drive the spoiler to move on the cross section of the powder flow channel to adjust the flow cross section size of the powder flow channel. The present invention provides a broadband powder feeding nozzle for adjusting powder concentration distribution, which is used for real-time matching of variable broadband light spots in laser cladding, and can effectively improve the production efficiency of laser cladding and reduce production costs.

Description

Technical Field

[0001] The invention belongs to the field of laser cladding, and in particular relates to a wide-band powder feeding nozzle for adjusting powder concentration distribution. Background Art

[0002] Laser cladding technology, which uses laser as a technical means, has unique advantages in mechanical properties that exceed castings and are comparable to traditional forgings, and plays an irreplaceable role in industrial additive manufacturing.

[0003] Compared with small circular spot laser cladding, the advantages of broadband spot laser cladding are mainly reflected in higher cladding efficiency, better forming quality, more consistent chemical properties, and higher dimensional accuracy. In order to further match and optimize the broadband spot, it is necessary to improve the traditional powder nozzle to deliver a stable powder flow with expected shape and controllable quality.

[0004] However, due to the primitive and very simple design of broadband laser cladding powder nozzles currently used by relevant enterprises, broadband laser cladding still has great limitations in terms of quality control. This patent invents a powder delivery nozzle for broadband laser cladding. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention provides a technical solution of a wide-band powder feeding nozzle for adjusting powder concentration distribution.

[0006] A wideband powder feeding nozzle for adjusting powder concentration distribution comprises a nozzle body, a powder flow channel for feeding powder is arranged on the nozzle body, a spoiler mechanism is arranged on the nozzle body, the spoiler mechanism comprises a spoiler and a spoiler driver, the position of the spoiler corresponds to the powder flow channel, and the spoiler driver is used to drive the spoiler to move on the cross section of the powder flow channel to adjust the flow cross section size of the powder flow channel.

[0007] Furthermore, the spoiler driver is used to drive the spoiler to extend and retract, and when the spoiler is extended to its longest position, the spoiler blocks the cross-section of the powder flow channel; the spoiler mechanism includes multiple spoilers and multiple spoiler drivers, and the spoilers are connected to the spoiler drivers in a one-to-one correspondence.

[0008] Furthermore, a spoiler hole for the spoiler to pass through is provided on the nozzle body, and the spoiler hole is connected to the powder flow channel.

[0009] Furthermore, the powder flow channel includes a straight powder flow channel section and an inclined powder flow channel section connected front and back, the straight powder flow channel section is horizontally arranged, the inclined powder flow channel section is inclined with the front lower and the rear higher, the rear end of the inclined powder flow channel section has a powder inlet, and the front end of the straight powder flow channel section has a powder outlet.

[0010] Furthermore, the nozzle body comprises a cover plate and a bottom plate which are arranged up and down, a straight section of a powder flow channel is formed between the cover plate and the bottom plate, and the inclined section of the powder flow channel is arranged at the rear end of the cover plate.

[0011] Further, the cover plate includes a straight section and an inclined section of the cover plate connected front and back, the straight section of the cover plate is horizontally arranged, the inclined section of the cover plate is inclined with the front lower and the rear higher, and the inclined section of the powder flow channel is arranged on the inclined section of the cover plate; the bottom plate includes a straight section and an inclined section of the bottom plate connected front and back, the straight section of the bottom plate is horizontally arranged, the inclined section of the bottom plate is inclined with the front lower and the rear higher, and the straight section of the powder flow channel is a groove arranged on the upper surface of the straight section of the bottom plate.

[0012] Furthermore, the spoiler mechanism also includes a spoiler mounting seat arranged at the upper end of the cover plate, and the spoiler mounting seat is used to install a spoiler driver.

[0013] Furthermore, a cooling water channel is provided on the nozzle body.

[0014] Furthermore, the cooling water flow channel is located at the rear end of the nozzle body and is inclined with the front lower and the rear higher.

[0015] Furthermore, a hole for clamp fixing is arranged on the side surface of the nozzle body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a broadband powder feeding nozzle for adjusting powder concentration distribution, which is used for real-time matching of variable broadband light spots in laser cladding, and can effectively improve the production efficiency of laser cladding and reduce production costs;

[0018] 2. The present invention uses a spoiler to control the powder passing through the powder flow channel. The spoiler is provided with a plurality of spoiler plates, and the concentration of the powder can be adjusted in real time and quickly as needed, thereby increasing the controllability of the device;

[0019] 3. The spoiler plates of the spoiler mechanism of the present invention are individually controlled by the spoiler driver inside the spoiler mechanism. The control mode is simple lifting and lowering. The control method is simple, which simplifies the operation of adjusting the powder concentration, facilitates production and maintenance, and reduces the overall cost.

[0020] 4. The present invention is provided with a cooling water flow channel, so that the entire device can be cooled by cooling water during operation, thereby increasing the overall service life;

[0021] 5. The present invention is provided with holes for fixture fixing, which facilitates the installation of the device into an existing laser cladding device at any time, thereby improving the applicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is an exploded view of the present invention;

[0024] Figure 3 It is a front view of the spoiler mechanism in the present invention;

[0025] Figure 4 is a bottom view of the spoiler mechanism of the present invention;

[0026] Figure 5 It is a front view of the cover plate in the present invention;

[0027] Figure 6 is a bottom view of the cover plate of the present invention;

[0028] Figure 7 It is a right side view of the cover plate in the present invention;

[0029] Figure 8 is a front view of the bottom plate of the present invention;

[0030] Fig. 9 is a top view of the bottom plate of the present invention;

[0031] Fig.10 It is a left side view of the bottom plate of the present invention. DETAILED DESCRIPTION

[0032] In the description of the present invention, it is necessary to understand that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on the present invention.

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] like Figure 1-10 As shown, a broadband powder feeding nozzle for adjusting powder concentration distribution includes a spoiler mechanism 1 and a nozzle body, wherein the nozzle body includes a cover plate 2 and a bottom plate 3 arranged upper and lower, the spoiler mechanism 1 is fixed on the cover plate 2, and the cover plate 2 is fixed on the bottom plate 3, and the fixation is performed by bolts, the spoiler mechanism 1 includes a spoiler 11 and a spoiler driver, the position of the spoiler 11 corresponds to the powder flow channel, and the spoiler driver is used to drive the spoiler 11 to move on the cross section of the powder flow channel to adjust the flow cross section size of the powder flow channel.

[0035] Continue reading Figure 2The cover plate 2 includes a front-to-back connected straight section and a cover plate inclined section 22, the straight section is horizontally arranged, and the inclined section 22 is inclined with the front lower and the rear higher. The bottom plate 3 includes a front-to-back connected straight section and a bottom plate inclined section 33, the straight section is horizontally arranged, and the inclined section 33 is inclined with the front lower and the rear higher. The bottom surfaces of the straight section and the inclined section 22 are in an obtuse V shape, and the upper surfaces of the straight section and the inclined section 33 are in an obtuse V shape. The bottom surfaces of the straight section and the inclined section 22 and the upper surfaces of the straight section and the inclined section 33 match each other and are in a completely fitted state when fixed. The end surface of the inclined section 22 is an inclined cover rear end surface 24, and the end surface of the inclined section 33 is an inclined bottom rear end surface 35.

[0036] Furthermore, the inclined section 22 of the cover plate cooperates with the inclined section 33 of the bottom plate, the bottom surface of the straight section of the cover plate fits with the upper surface of the straight section of the bottom plate, the inclined bottom surface of the inclined section 22 of the cover plate fits with the inclined surface of the inclined section 33 of the bottom plate, the straight section of the cover plate is connected to the straight section of the bottom plate by bolts, and the inclined section 22 of the cover plate is connected to the inclined section 33 of the bottom plate by bolts; a horizontally arranged powder flow channel straight section 31 is provided between the straight section of the cover plate and the straight section of the bottom plate, the inclined section of the cover plate 22 is provided with the inclined section of the powder flow channel 23, the inclined section of the powder flow channel 23 is a circular hole structure, and the inclined section of the powder flow channel 23 is inclined along the inclined section of the cover plate 22 to increase the outlet area of ​​the inclined section of the powder flow channel 23 and reduce resistance. One end of the straight section 31 of the powder flow channel is connected to the inclined section 23 of the powder flow channel of the cover plate inclined section 22, and the two constitute an integral powder flow channel. The front end of the straight section 31 of the powder flow channel extends to the outlet end of the nozzle body to form a powder outlet, and the rear end of the inclined section 23 of the powder flow channel has a powder inlet; the straight section of the cover plate is provided with a connecting spoiler hole 21 connected to the powder flow channel, the spoiler mechanism 1 is fixed on the upper surface of the straight section of the cover plate, and the spoiler 11 of the spoiler mechanism 1 passes through the spoiler hole 21 on the straight section of the cover plate and extends into the straight section 31 of the powder flow channel.

[0037] The straight section of the cover plate is provided with a plurality of spoiler holes 21, and the spoiler mechanism 1 is provided with a plurality of spoilers 11, and the number, shape and size of the spoiler holes 12 are consistent with the number, shape and size of the spoilers 11 on the spoiler mechanism 1. The spoilers 11 extend from the inside to the outside below the spoiler mechanism 1, and the working state of each spoiler 11 is controlled by the spoiler driver inside the spoiler mechanism 1. The motion state of each spoiler 11 is independently controlled by the spoiler driver inside the spoiler mechanism 1, and the spoiler driver can be an electric cylinder, a pneumatic cylinder, an oil cylinder, etc. For example, there are four spoilers 11, of which three equally large spoilers 11 are three micro-arc spoilers distributed in a straight line, and another larger spoiler is arranged in front of the three spoilers as a large-arc spoiler. The spoiler 11 can be extended and retracted up and down within a certain range. When a single spoiler 11 is contracted to its shortest position, the bottom of the spoiler 11 is flush with the bottom of the straight section of the cover plate 2, and the cross-section of the powder flow path is the largest. When a single spoiler 11 is extended to its longest position, the bottom of the spoiler 11 is flush with the lower surface of the straight section 31 of the powder flow path, and the cross-section of the powder flow path is the smallest.

[0038] Furthermore, the powder flow channel straight section 31 is specifically a groove opened on the upper surface of the bottom plate straight section, and the groove and the bottom surface of the bottom plate straight section enclose the powder flow channel straight section 31, and the cross-sectional shape of the powder flow channel straight section 31 is square or rectangular.

[0039] Continue reading Figure 8-10 A cooling water channel 34 is provided on the bottom plate inclined section 33 of the bottom plate 3, and the inlet end of the cooling water channel 34 is flush with the inlet end of the powder channel inclined section 23 of the cover plate inclined section 22; holes 32 for clamp fixing are provided on both sides of the bottom plate straight section.

[0040] The straight section of the cover plate and the straight section of the bottom plate are provided with mutually matched fixing threaded holes, the inclined section of the cover plate 22 and the inclined section of the bottom plate 33 are provided with mutually matched fixing threaded holes, and the cover plate 2 and the bottom plate 3 are fixedly connected by bolts passing through the fixing threaded holes.

[0041] The working principle of the present invention is:

[0042] The carrier gas powder flow is introduced into the inclined section 23 of the powder flow channel on the rear end surface 24 of the cover plate, and the carrier gas powder flow passes through the inclined section 23 of the powder flow channel, the straight section 31 of the powder flow channel, and the spoiler 11 and is transported to the outlet end of the nozzle body; the spoiler 11 is controlled by the spoiler driver inside the spoiler mechanism 1, and the plurality of spoilers 11 respectively realize two motion states;

[0043] In the flow-through state, the spoiler 11 shrinks inward to the shortest point and stops, the front end of the spoiler 11 stops at the lower surface of the cover plate 2, and the spoiler hole 21 is closed. At this time, the carrier gas powder flow passes through this area normally;

[0044] In the blocking state, the spoiler 11 extends outward to its longest length and stops, the front end of the spoiler 11 stops at the surface of the groove of the straight section 31 of the bottom plate powder flow channel, and the spoiler hole 21 is closed, so that the carrier gas powder flow cannot pass through this area.

[0045] Different states of the spoiler 11 change the existence of powder flow in the original spoiler area. Multiple spoilers 11 work together to control the spatial area of ​​the entire powder flow channel through the carrier gas powder flow in the lateral direction, thereby adjusting the concentration distribution of the carrier gas powder flow at the nozzle outlet section.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wide-band powder feeding nozzle for adjusting powder concentration distribution, comprising a nozzle body, wherein a powder flow channel for feeding powder is arranged on the nozzle body, characterized in that: The nozzle body is provided with a flow spoiler mechanism, the flow spoiler mechanism comprises a flow spoiler and a flow spoiler driver, the position of the flow spoiler corresponds to the powder flow channel, and the flow spoiler driver is used to drive the flow spoiler to move on the cross section of the powder flow channel to adjust the flow cross section size of the powder flow channel; The powder flow channel comprises a straight section of powder flow channel and an inclined section of powder flow channel connected front and back, the straight section of powder flow channel is arranged horizontally, the inclined section of powder flow channel is inclined with a front lower and a rear higher position, a rear end of the inclined section of powder flow channel has a powder inlet, and a front end of the straight section of powder flow channel has a powder outlet; the nozzle body comprises a cover plate and a bottom plate arranged up and down, a straight section of powder flow channel is formed between the cover plate and the bottom plate, and the inclined section of powder flow channel is arranged at the rear end of the cover plate; the cover plate comprises a straight section of cover plate and an inclined section of cover plate connected front and back, the straight section of cover plate is arranged horizontally, the inclined section of cover plate is inclined with a front lower and a rear higher position, and the inclined section of powder flow channel is arranged at the inclined section of cover plate; the bottom plate comprises a straight section of bottom plate and an inclined section of bottom plate connected front and back, the straight section of bottom plate is arranged horizontally, the inclined section of bottom plate is inclined with a front lower and a rear higher position, and the straight section of powder flow channel is a groove arranged on the upper surface of the straight section of bottom plate; There are four spoilers, including three equally sized micro-arc spoilers and one large-arc spoiler, the three micro-arc spoilers are distributed in a straight line, the large-arc spoiler is arranged in front of the three micro-arc spoilers, the arc-shaped concave side of the large-arc spoiler faces the three micro-arc spoilers, the arc-shaped concave side of the micro-arc spoiler faces the large-arc spoiler, a gap is formed between the three micro-arc spoilers, and the large-arc spoiler blocks the gap between the three micro-arc spoilers.

2. A wide-band powder feeding nozzle for adjusting powder concentration distribution according to claim 1, characterized in that: The spoiler driver is used to drive the spoiler to extend and retract. When the spoiler is extended to its longest length, the spoiler blocks the cross section of the powder flow channel. The spoiler mechanism includes a plurality of spoilers and a plurality of spoiler drivers, and the spoilers are connected to the spoiler drivers in a one-to-one correspondence.

3. A wide-band powder feeding nozzle for adjusting powder concentration distribution according to claim 1, characterized in that: The nozzle body is provided with a flow-disturbing hole for the flow-disturbing member to pass through, and the flow-disturbing hole is connected to the powder flow channel.

4. A wide-band powder feeding nozzle for adjusting powder concentration distribution according to claim 1, characterized in that: The spoiler mechanism also includes a spoiler mounting seat arranged on the upper end of the cover plate, and the spoiler mounting seat is used to install a spoiler driver.

5. The wide-band powder feeding nozzle for adjusting powder concentration distribution according to claim 1, characterized in that: A cooling water flow channel is arranged on the nozzle body.

6. A wide-band powder feeding nozzle for adjusting powder concentration distribution according to claim 5, characterized in that: The cooling water flow channel is located at the rear end of the nozzle body and is inclined with the front lower and the rear higher.

7. A wide-band powder feeding nozzle for adjusting powder concentration distribution according to claim 1, characterized in that: The side surface of the nozzle body is provided with holes for fixing with a clamp.

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