CN217173850U - Local slurry aluminizing device for large annular thin-walled part - Google Patents

Abstract

The utility model provides a local ground paste aluminizing device of large-scale annular thin wall spare, includes revolving stage and elevating system, the revolving stage is used for driving annular thin wall spare rotatory, elevating system is last to be connected with the carrier, be provided with at least one induction coil on the carrier, induction coil is used for moving and heating annular thin wall spare under elevating system's drive. The utility model discloses a mode heating thin wall spare of open local heating when being used for not unidimensional annular thin wall spare, need not to adopt the large-scale closed atmosphere stove of assorted, only need adjust carry on the piece induction coil size, quantity, arrangement mode can, flexible operation, low, the universality of processing cost is strong.

Description

Local slurry aluminizing device for large annular thin-walled part

Technical Field

The utility model relates to a metal material surface treatment technical field, concretely relates to local ground paste aluminizing device of large-scale annular thin wall spare.

Background

The aluminized protective layer is one of the most widely and mature coatings used in an ultra-high temperature environment, and the main principle is that active aluminum is diffused into an alloy base material through the diffusion principle to form an Al-rich phase infiltrated layer with a certain thickness; under the high-temperature environment, the Al-rich phase can generate compact alpha-alumina, thereby preventing the alloy base material from being further corroded and forming a protective effect. Currently, the commonly used aluminizing methods in large-scale production include vapor-phase aluminizing, pack aluminizing, slurry aluminizing and CVD aluminizing.

The slurry aluminizing is to mix solid aluminizing agent and adhesive into slurry and to coat the slurry on the surface of workpiece and to heat and diffuse aluminizing. The traditional slurry aluminizing method adopts a closed atmosphere furnace to directly heat and aluminize a workpiece. For large annular thin-walled parts, a corresponding large atmosphere furnace is needed, so that the aluminizing cost is increased; more importantly, for the nickel-based superalloy, the temperature of slurry aluminizing is usually higher than 850 ℃, if thin-walled parts made of the alloy material are placed in a matched large atmosphere furnace for direct heating aluminizing, the high temperature generates great internal stress in the parts, and in the subsequent cooling process, the released stress causes serious defects of local deformation, warping and the like of the thin-walled parts, so that the product quality is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a local ground paste aluminizing device of large-scale annular thin wall spare, its mode that adopts local high frequency induction heating carries out high temperature heating at annular thin wall spare part is local to when adopting the large-scale annular thin wall spare of closed atmosphere stove direct heating aluminizing among the solution prior art, the internal stress that the thin wall spare produced leads to the problem of serious defects such as thin wall spare local deformation, warpage easily at the cooling process in the heating process.

The utility model discloses a following technical scheme realizes:

the utility model provides a local ground paste aluminizing device of large-scale annular thin wall spare, includes revolving stage and elevating system, the revolving stage is used for driving annular thin wall spare rotatory, elevating system is last to be connected with the carrier, be provided with at least one induction coil on the carrier, induction coil is used for moving and heating annular thin wall spare under elevating system's drive.

Different from the closed integral heating in the prior art, in the technical scheme, the slurry aluminizing device adopts an open type local heating conductive aluminizing layer.

Specifically, the local slurry aluminizing device mainly comprises a rotating table and a lifting mechanism. The rotary table is used for placing an annular thin-wall part to be processed and driving the annular thin-wall part to rotate around the axis of the thin-wall part per se below a carrying part of the lifting mechanism. The lifting mechanism is used for installing the carrying piece and further driving the induction coil to move towards or back to the thin-wall piece on the rotating platform by driving the carrying piece.

When the carrying piece moves to the preset position, one or more induction coils installed on the carrying piece are positioned above the conductive seepage layer of the thin-wall piece. The induction coil heats the workpiece by utilizing the principle of electromagnetic induction heating, and alternating current provided by a power supply forms an alternating magnetic field through the workpiece by forming current in the material so as to enable the workpiece to generate eddy current for heating. This technical scheme adopts current induction coil and corollary equipment to realize induction coil's heating, no longer gives unnecessary details here.

When the device works, the annular thin-wall part is fixed on the rotating table, and the surface of the annular thin-wall part is coated with the conductive seepage layer; then, adjusting the number, size and arrangement mode of induction coils on the carrying piece according to the specific structure of the annular thin-walled piece, electrifying the induction coils after adjustment, and moving the induction coils to the surface of the conductive infiltrated layer by using a lifting mechanism for heating; after heating of the thin-walled workpiece area below the induction coil is completed, the rotating table is driven to rotate for a certain angle to move the unheated area to the position below the induction coil for continuous heating, and the steps are repeated until all areas on the surface are uniformly heated after the annular thin-walled workpiece rotates for at least one circle.

The local slurry aluminizing device designed aiming at the large annular thin-wall part adopts an open local heating mode to heat the thin-wall part, and when the device is used for annular thin-wall parts with different sizes, a matched large closed atmosphere furnace is not needed, and the size, the number and the arrangement mode of induction coils on a carrying part are only needed to be adjusted, so that the device is flexible to operate, low in processing cost and strong in universality; moreover, the local heating allows a worker to quickly adjust the heating position according to the stress change and the heating change of the surface of the annular thin-wall part, so that the heating and stress of all parts of the annular thin-wall part are uniform, the generation of internal stress is obviously reduced, and the aluminizing quality of the thin-wall part is effectively improved.

As the utility model discloses well elevating system's a preferred embodiment, elevating system includes the pneumatic cylinder, the output of pneumatic cylinder passes through the cantilever and connects the carrier. In the technical scheme, the lifting mechanism is driven by a hydraulic cylinder, a piston rod of the hydraulic cylinder vertically moves up and down under the drive of the oil pump, and the cantilever is driven to move up and down, so that the carrying piece is driven to move towards or back to the rotating platform.

Furthermore, a fixing plate is connected to the cantilever, and the carrying piece is detachably connected to the fixing plate. The fixed plate connected to the cantilever is used for mounting a carrying piece, and the carrying piece is detachably mounted on the fixed plate so as to be convenient for replacing carrying pieces of different specifications according to the size of the thin-wall piece and adjust the induction coil on the carrying piece.

As the utility model discloses well carrier's preferred structure, be provided with the boss on carrier's the lower surface. The boss enables the induction coil arranged on the lower surface of the carrying part to form staggered distribution, namely the induction coil arranged on the boss can be closer to a thin-walled part earlier than the induction coil not arranged on the boss.

The design of the boss mainly aims at the annular thin-walled piece with the groove. For part annular thin-walled parts, such as an outer ring of an engine guide, the surface of the part annular thin-walled part is provided with continuous mounting grooves, the depth can reach 5-15 cm, the conventional closed heating is difficult to ensure that the grooves are uniformly heated, so that the problems of insufficient groove aluminizing depth or leakage can be caused, the problems can become the source of part corrosion when the part works, and the service life of the part is greatly reduced. Therefore, the induction coil can be deeply inserted into the groove of the thin-wall part to be locally and accurately heated by arranging the lug boss, so that the heating effect of the infiltration layer is further improved, and the uniform heating of all parts of the thin-wall part is ensured.

Further, the lower surface and/or the boss of the carrying piece are/is provided with a mounting groove, and the mounting groove is used for mounting the induction coil. The mounting groove can be only arranged on the lower surface of the carrying piece, also can be only arranged on the boss of the carrying piece, and also can be simultaneously arranged on the lower surface and the boss according to different specifications of the carrying piece. The mounting groove can fix the induction coil therein through threaded connection, and can also fix the induction coil through a fastener. In some embodiments, a clamping member such as a hoop is further arranged in the mounting groove, and the clamping member is matched with the size of the induction coil so as to firmly clamp the induction coil.

Further, the induction coil is of an arc-shaped structure. In the technical scheme, the induction coil is of an arc-shaped strip structure so that the induction coil can be better attached to the arc-shaped groove of the thin-wall part.

Furthermore, the central angle of the induction coil is 90-270 degrees. Preferably, the central angle of the induction coil is 90 °.

As a preferred embodiment of the utility model, still include the argon gas source, the argon gas source is connected with the nozzle, the nozzle be used for to induction coil heating's region lets in argon gas. The argon source can introduce argon to the conductive infiltrated layer on the surface of the thin-wall part through the nozzle, so that local inert atmosphere is obtained, oxidation is reduced, and the aluminizing quality of the workpiece is improved. Meanwhile, the argon is heavier than air, so that an air film can be better formed on the surface of the permeable layer.

Further, a heating furnace is further arranged between the argon gas source and the nozzle, and the heating furnace is used for heating argon gas. The heating furnace is used for heating the argon gas so that the argon gas sprayed out of the nozzle has higher temperature, such as 850-900 ℃, and the temperature of the conductive permeation layer is prevented from being reduced by the introduced argon gas.

Further, still include driving motor, driving motor's output is connected with the revolving stage. Preferably, the driving motor may be a stepping motor or a servo motor.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model adopts the open type local heating mode to heat the thin-wall parts, when the device is used for the annular thin-wall parts with different sizes, the device does not need to adopt a large-scale closed atmosphere furnace, and only needs to adjust the size, the quantity and the arrangement mode of the induction coils on the carrying part, thereby having flexible operation, low processing cost and strong universality;

2. the utility model discloses a local heating allows the staff to adjust the heating position according to the stress change, the heating change on annular thin wall spare surface fast, ensures that annular thin wall spare each department is heated, the stress is even, reduces the internal stress production remarkably, has improved the aluminizing quality of thin wall spare effectively, is fit for the local aluminizing of large-scale annular thin wall spare, local aluminizing is repaired;

3. the utility model discloses a set up the boss on the carrier, can make induction coil form the height distribution of straggling, be favorable to carrying out local accurate heating with induction coil deep into the recess inside of thin wall spare, be adapted to the even heating of thin wall spare in area recess.

4. The utility model discloses utilize argon gas source and heating furnace to continuously let in argon gas to thin wall spare in thin wall spare heating process, utilize the dead weight of argon gas to form local inert atmosphere on the permeable bed surface, reduce the oxidation, improve work piece calorization quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic top view of a large annular thin-walled member such as an engine guide outer ring;

FIG. 2 is a schematic structural view of a slurry aluminizing device according to an embodiment of the present invention;

fig. 3 is a schematic bottom view of a carrier for carrying an induction coil according to an embodiment of the present invention;

FIG. 4 is a schematic view of an argon source for introducing argon gas to the surface of a thin-walled part to form a local inert atmosphere in an embodiment of the present invention;

FIG. 5 is a schematic view of an arc-shaped induction coil with a 90 ° central angle heating a thin-walled part with a groove according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an arc-shaped induction coil heating grooved thin-walled article with a 180 ° central angle according to an embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

1-rotating table, 2-driving motor, 3-hydraulic cylinder, 4-piston rod, 5-cantilever, 6-fixing plate, 7-carrying piece, 71-boss, 72-induction coil, 73-mounting groove, 8-heating furnace, 9-argon gas source, 10-nozzle, 11-conductive seepage layer, 12-annular thin-wall piece and 13-groove.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.

Example 1:

as shown in fig. 2 to 4, the local slurry aluminizing device for a large annular thin-walled member includes a rotating table 1 and a lifting mechanism, the rotating table 1 is used for driving the annular thin-walled member 12 to rotate, the lifting mechanism is connected with a carrying member 7, at least one induction coil 72 is arranged on the carrying member 7, and the induction coil 72 is used for moving towards the annular thin-walled member 12 and heating the annular thin-walled member 12 under the driving of the lifting mechanism.

When the device works, the annular thin-wall part shown in figure 1 is fixed on a rotating table, and the surface of the annular thin-wall part is coated with a conductive seepage layer; then, adjusting the number, size and arrangement mode of induction coils on the carrying piece according to the specific structure of the annular thin-walled piece, electrifying the induction coils after the adjustment is finished, and moving the induction coils to the surface of the conductive infiltrated layer by using a lifting mechanism for heating; after the thin-walled workpiece area below the induction coil is heated, as shown in fig. 5 and 6, the rotating table is driven to rotate by a certain angle to move the unheated area to the position below the induction coil for continuous heating, and the steps are repeated until all areas on the surface are uniformly heated after the annular thin-walled workpiece rotates for at least one circle.

In some embodiments, as shown in fig. 2, the lifting mechanism comprises a hydraulic cylinder 3, and the output end of the hydraulic cylinder 3 is connected with a carrier 7 through a cantilever 5. In one or more embodiments, the length of the cantilever is adjustable, and the position of the induction coil on a horizontal plane can be changed by adjusting the length of the cantilever, so that the induction coil can be better moved to a specified position.

In one or more embodiments, a fixing plate 6 is connected to the cantilever 5, and the carrier 7 is detachably connected to the fixing plate 6. In some embodiments, the carrier and the fixing plate are connected through a fastening member, and in one embodiment, screw holes are formed in the carrier and the fixing plate, and the fastening member connection of the carrier and the fixing plate is realized through nut connection screw holes. In some embodiments, the carrier and the fixing plate may also be connected by clipping.

In some embodiments, the aluminizing device further comprises a driving motor 2, and the output end of the driving motor 2 is connected with the rotating table 1.

Example 2:

in addition to embodiment 1, as shown in fig. 2 and 3, a boss 71 is provided on the lower surface of the carrier 7. Through setting up the boss, can carry out local accurate heating with induction coil deepening to the inside recess of thin wall spare to further improve the infiltration layer heating effect, ensure that all places thermally equivalent of thin wall spare.

In one or more embodiments, the bosses are detachably mounted on the carrying piece, so that the positions and the number of the bosses can be adjusted according to actual requirements.

In some embodiments, the lower surface of the carrier 7 and/or the boss 71 is provided with a mounting groove 73, and the mounting groove 73 is used for mounting the induction coil 72.

In some embodiments, the induction coil 72 has an arc-shaped structure.

In some embodiments, the central angle of the induction coil 72 is 90-270 °, and preferably, as shown in fig. 5 and 6, the central angle of the induction coil 72 is 90 ° or 180 °.

Example 3:

on the basis of the above embodiment, the apparatus for localized slurry aluminizing of a large annular thin-walled workpiece shown in fig. 4 further includes an argon gas source 9, the argon gas source 9 is connected with a nozzle 10, and the nozzle 10 is used for introducing argon gas into the region heated by the induction coil 72.

The argon source can introduce argon to the conductive infiltrated layer on the surface of the thin-wall part through the nozzle, so that local inert atmosphere is obtained, oxidation is reduced, and the aluminizing quality of the workpiece is improved. Meanwhile, the argon is heavier than air, so that an air film can be better formed on the surface of the permeable layer.

In one or more embodiments, a heating furnace 8 is further disposed between the argon gas source 9 and the nozzle 10, and the heating furnace 8 is used for heating the argon gas. The heating furnace is used for heating the argon gas so that the argon gas sprayed out of the nozzle has higher temperature, such as 850-900 ℃, and the temperature of the conductive permeation layer is prevented from being reduced by the introduced argon gas.

As used herein, "first," "second," etc. merely distinguish the corresponding components for clarity of description and are not intended to limit any order or to emphasize importance, etc. Further, the term "connected" used herein may be either directly connected or indirectly connected via other components without being particularly described.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The local slurry aluminizing device for the large annular thin-walled part is characterized by comprising a rotating table (1) and a lifting mechanism, wherein the rotating table (1) is used for driving the annular thin-walled part (12) to rotate, the lifting mechanism is connected with a carrying piece (7), at least one induction coil (72) is arranged on the carrying piece (7), and the induction coil (72) is used for moving towards the annular thin-walled part (12) and heating the annular thin-walled part (12) under the driving of the lifting mechanism.

2. The apparatus for localized slurry aluminizing of a large-scale thin-walled annular member according to claim 1, wherein the lifting mechanism includes a hydraulic cylinder (3), and an output end of the hydraulic cylinder (3) is connected to the carrier (7) through a cantilever (5).

3. The apparatus for localized slurry aluminizing of a large-scale thin-walled annular member according to claim 2, wherein a fixed plate (6) is attached to the cantilever (5), and the carrier (7) is detachably attached to the fixed plate (6).

4. The local slurry aluminizing device for the large-scale annular thin-walled member according to any one of claims 1 to 3, characterized in that a boss (71) is arranged on the lower surface of the carrier (7).

5. The local slurry aluminizing device for large-scale annular thin-walled parts according to claim 4, characterized in that mounting grooves (73) are formed in the lower surface and/or the bosses (71) of the carrying piece (7), and the mounting grooves (73) are used for mounting the induction coil (72).

6. The apparatus for localized slip aluminizing of a large, annular thin-walled member according to claim 4, wherein the induction coil (72) is of arcuate configuration.

7. The apparatus for localized slurry aluminizing of a large-scale thin-walled annular member according to claim 6, wherein the central angle of the induction coil (72) is 90 to 270 °.

8. Local slip aluminizing unit according to claim 1, characterized in that it further comprises an argon gas source (9), to which source (9) a nozzle (10) is connected, said nozzle (10) being adapted to introduce argon into the area heated by the induction coil (72).

9. The apparatus for localized slurry aluminizing of a large-scale thin-walled annular member according to claim 8, wherein a heating furnace (8) is further provided between the argon gas source (9) and the nozzle (10), and the heating furnace (8) is used for heating the argon gas.

10. The local slurry aluminizing device for the large-sized annular thin-walled member according to claim 1, characterized by further comprising a driving motor (2), wherein a rotating table (1) is connected to an output end of the driving motor (2).

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