阅读说明：本技术 一种热喷涂用原位超声滚压一体化装置及方法 (in-situ ultrasonic rolling integrated device and method for thermal spraying ) 是由 李燕乐 刘元玉 王梓鉴 成梓楠 李方义 李剑峰 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种热喷涂用原位超声滚压一体化装置及方法,它解决了现有技术中加工时易划伤加工表面、破坏涂层的完整性、滚压加工效率不高的问题,能够在板材热喷涂后进行原位滚压而无需二次装夹,有利于提高热喷涂涂层制备和涂层表面处理的工作效率。其技术方案为：包括热喷涂喷头和滚压工具,热喷涂喷头通过纵向调节装置与横向调节装置相连；滚压工具安装于旋转机构下方,旋转机构连接于横向调节装置一侧,使滚压工具与热喷涂喷头之间的距离可调；滚压工具包括多个均匀安装的滚压头,滚压头与待加工板材之间形成滚动摩擦；滚压头在远离加工端与超声装置连接；滚压头在远离加工端与超声装置连接；滚压头的端部安装滚珠,滚珠的安装位置设有凹坑。(The invention discloses an in-situ ultrasonic rolling integrated device and a method for thermal spraying, which solve the problems that a processing surface is easy to scratch, the integrity of a coating is damaged and the rolling processing efficiency is low in the prior art during processing, can perform in-situ rolling after thermal spraying of a plate without secondary clamping, and is beneficial to improving the working efficiency of preparation of the thermal spraying coating and treatment of the coating surface.)

1, kind of hot spraying is with original position supersound roll extrusion materialization device, its characterized in that includes:

the thermal spraying nozzle is connected with the transverse adjusting device through the longitudinal adjusting device;

the rolling tool is arranged below the rotating mechanism, and the rotating mechanism is connected to the side of the transverse adjusting device , so that the distance between the rolling tool and the thermal spraying nozzle can be adjusted;

the rolling tool comprises a plurality of uniformly installed rolling heads, and rolling friction is formed between the rolling heads and a plate to be processed; the rolling head is connected with the ultrasonic device at the position far away from the processing end; the rolling head is characterized in that a ball is mounted at the end of the rolling head, and a pit for storing lubricating grease is arranged at the mounting position of the ball.

2. The in-situ ultrasonic roll-compaction device for thermal spraying of claim 1, wherein the ultrasonic device comprises an amplitude transformer and a transducer, the amplitude transformer is detachably connected with the roll compaction head at one end, the other end is connected with the transducer, and a plurality of transducers input the same ultrasonic signals.

3. The in-situ ultrasonic rolling device for thermal spraying of claim 2, wherein an upper protective shell is mounted on top of the rolling head, the top end of the upper protective shell is connected with a th cover plate, a collector ring is mounted at the center of the th cover plate, and an ultrasonic signal is transmitted to the collector ring through a lead and then transmitted to the transducer.

4. The in-situ ultrasonic rolling integrated device for thermal spraying of claim 3, wherein the inner wall of the upper protective shell is provided with a water-cooling circulation pipeline.

5. The in-situ ultrasonic rolling body forming device for thermal spraying of claim 1, wherein a force measuring device is mounted at the lower end of the rolling tool and comprises a strain gauge, a circuit board and a battery, the strain gauge is connected with the circuit board, the circuit board and the battery are symmetrically mounted, and a balancing weight is arranged at the mounting position of the circuit board.

6. The in-situ ultrasonic rolling atomization device for thermal spraying of claim 1, wherein the transverse adjusting device comprises a driving motor, a guide mechanism and a link mechanism, and the driving motor is connected with the link mechanism through the guide mechanism to drive the link mechanism to stretch or shorten;

the end of the link mechanism is slidably connected with the longitudinal adjustment device.

7. The in-situ ultrasonic rolling device for thermal spraying as claimed in claim 6, wherein the guiding mechanism comprises a th lead screw longitudinally arranged, a guide rod arranged in parallel with the th lead screw, a th slide block in threaded connection with the th lead screw, and the th slide block is connected with a link mechanism.

8. The in-situ ultrasonic rolling integrated device for thermal spraying of claim 1 or 7, wherein the longitudinal adjustment device comprises a lead screw pair consisting of a second lead screw and a second slide block, the second slide block is detachably connected with the thermal spraying nozzle, and the second lead screw is connected with a driving motor.

9. The in-situ ultrasonic roll apparatus of claim 1, wherein the thermal spray head is connected to a plurality of plastic tubes to provide energy support and powder supply for spraying.

10. The use of the in situ ultrasonic roll atomization device for thermal spraying of any of claims 1-9 and , comprising the steps of:

1) mounting the integrated device on a mechanical arm;

2) performing sand blasting on a plate to be processed, and then clamping the plate on a machine tool;

3) adjusting the spraying distance and the transverse distance, and adjusting the initial position of the mechanical arm;

4) starting the thermal spraying system, and feeding powder after the electric arc is stabilized;

5) after the powder feeding is stable, starting a driving motor, accessing an ultrasonic signal and starting processing;

6) and (5) taking down the plate after the machining is finished, and shutting down the equipment.

Technical Field

The invention relates to the field of metal surface processing, in particular to an in-situ ultrasonic rolling integrated device and method for thermal spraying.

Background

The thermal spraying technique is a processing technique in which a material for spraying is rapidly heated to a molten or semi-molten state by using a certain heat source, and the molten spraying material is sprayed onto the surface of a part to be processed to form a surface coating. By the hot spraying additive technology, a wear-resistant layer, a corrosion-resistant layer or various functional layers can be prepared on the surface of a common material, so that the aims of improving the surface performance of a workpiece, prolonging the service life, saving materials or saving energy are fulfilled.

With the development of modern industry, more and more mechanical equipment needs to work in a severe environment, and protective coatings are often needed to be sprayed on the surfaces of the equipment to prolong the service life of the equipment. However, in the thermal spraying process, because a large temperature gradient exists between the coating and the substrate and the materials of the coating and the substrate have a difference in physical properties, residual stress is generated between the coating and the substrate, so that the coating fails in the using process, such as fracture, warpage and falling off, and the service life of parts is seriously influenced. Therefore, the surface of the coating needs to be strengthened after the thermal spraying, so that the bonding strength of the coating and the substrate is improved, and the service life of the part is prolonged.

The inventors have found that although conventional surface strengthening techniques mainly include shot peening, rolling, and the like, shot peening tends to increase the surface roughness of parts, to lower the fatigue resistance thereof, and to easily deform the workpieces when processing thin plate workpieces. And traditional roll extrusion can the fish tail by the machined surface, destroys the integrality of coating, and need change the instrument head or carry out the secondary clamping to the work piece when processing for roll extrusion's efficiency is not high.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides in-situ ultrasonic rolling integrated devices and methods for thermal spraying, which can perform in-situ rolling without secondary clamping after thermal spraying of a plate and are beneficial to improving the working efficiency of thermal spraying coating preparation and coating surface treatment.

The invention adopts the following technical scheme:

an in-situ ultrasonic rolling integrated device for thermal spraying, comprising:

the thermal spraying nozzle is connected with the transverse adjusting device through the longitudinal adjusting device; the thermal spraying nozzle is externally connected with three plastic pipes to provide energy support and powder supply for spraying;

the rolling tool is arranged below the rotating mechanism, and the rotating mechanism is connected to the side of the transverse adjusting device , so that the distance between the rolling tool and the thermal spraying nozzle can be adjusted;

the rolling tool comprises a plurality of uniformly installed rolling heads, and rolling friction is formed between the rolling heads and a plate to be processed; when the rolling machine works, the contact track of the balls and the plates is not the traditional linear contact track but a spiral track, so that the rolling processing efficiency is improved; the rolling head is connected with an ultrasonic device at the end far away from the processing end.

, mounting a ball at the end of the rolling head, wherein the ball is provided with a pit for storing lubricating grease.

, the ultrasonic device comprises a horn end detachably connected with the rolling head and end connected with the transducer, and a plurality of transducers input ultrasonic signals.

, an upper protective shell is installed on the top of the rolling head, the top end of the upper protective shell is connected with a th cover plate, a collector ring is installed in the center of a th cover plate, and ultrasonic signals are transmitted to the collector ring through a lead and then transmitted to the transducer.

, a water-cooling circulation pipeline is arranged on the inner wall of the upper protective shell.

And , installing a force measuring device at the lower end of the rolling tool, wherein the force measuring device comprises a strain gauge, a circuit board and a battery, the strain gauge is connected with the circuit board, the circuit board and the battery are symmetrically installed, and a balancing weight is arranged at the installation position of the circuit board.

, the transverse adjusting device comprises a driving motor, a guide mechanism and a link mechanism, wherein the driving motor is connected with the link mechanism through the guide mechanism and drives the link mechanism to stretch or shorten;

the end of the link mechanism is slidably connected with the longitudinal adjustment device.

, the guide mechanism comprises a th lead screw arranged longitudinally, a guide rod arranged in parallel with the th lead screw, and a th sliding block in threaded connection with the th lead screw, and the th sliding block is connected with the link mechanism.

And , the longitudinal adjusting device comprises a screw pair consisting of a second screw and a second sliding block, the second sliding block is detachably connected with the thermal spraying nozzle, and the second screw is connected with a driving motor.

The use method of the in-situ ultrasonic rolling integrated device for thermal spraying comprises the following steps:

1) mounting the integrated device on a mechanical arm;

2) performing sand blasting on a plate to be processed, and then clamping the plate on a machine tool;

3) adjusting the spraying distance and the transverse distance, and adjusting the initial position of the mechanical arm;

4) starting the thermal spraying system, and feeding powder after the electric arc is stabilized;

5) after the powder feeding is stable, starting a driving motor, accessing an ultrasonic signal and starting processing;

6) and (5) taking down the plate after the machining is finished, and shutting down the equipment.

Compared with the prior art, the invention has the beneficial effects that:

(1) according to the invention, through the effective combination of the thermal spraying nozzle and the rolling tool, the subsequent rolling processing can be realized without replacing the tool head or re-clamping after the plate is subjected to thermal spraying treatment, so that the bonding strength between the coating and the plate and the density of the coating are improved, and the processing efficiency is greatly improved;

(2) the rolling tool is driven to rotate by the servo motor, and a plurality of balls are used, so that the contact frequency of the balls and a plate is increased, and the rolling processing efficiency is greatly improved; rolling friction is formed between the balls and the plates, and compared with sliding friction between a rolling tool and the plates in the traditional rolling process, the rolling tool has the effect of improving the surface quality of the sprayed coating after rolling;

(3) the micro-scale pits processed at the ball mounting positions can store lubricating grease, provide lubrication for the balls during processing and reduce the abrasion of the balls; the water-cooling circulating pipeline in the upper protective shell can reduce the temperature of the transducer in the processing process and prolong the service life;

(4) the transverse distance adjusting device can adjust the interval time of spraying and rolling treatment according to different cooling speeds of the thermal spraying coating; the up-and-down movement of the thermal spraying nozzle is realized through a screw pair mechanism so as to meet the requirements of different materials on the spraying distance;

(5) the invention installs a plurality of transducers, and the plurality of transducers input the same ultrasonic signals, so as to ensure that the vibration frequency and the amplitude of the amplitude transformer are the same.

Drawings

The accompanying drawings, which form a part hereof , are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the application and together with the description serve to explain the application and not limit the application.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a rolling device according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a rolling head according to example of the present invention;

FIG. 4 is a schematic view of a longitudinal adjustment device according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of an upper protective shell of embodiment of the present invention;

FIG. 6 is a schematic view of an I-shaped slider configuration of embodiment of the present invention;

FIG. 7 is a schematic view of a flange configuration according to an embodiment of the present invention;

FIG. 8 is an exploded view of a force measuring device according to embodiment of the present invention;

the device comprises a connecting seat, a motor box 2, a motor box , a motor 3, a motor , a cover , an upper protective shell 5, a lower protective shell 6, a ball pressing cap 7, a ball, a second motor 9, a second motor 10, a second motor box 11, a connecting rod , a connecting rod 12, a second connecting rod 13, a hinged support, a motor 14, a third motor 15, a motor box third 16, a guide rod 17, a screw , a fixing sleeve 18, a sliding , a slider 20, a special-shaped slider 21, a lower end cover 22, a mounting shaft cylinder 23, a connecting rib plate 24, a thermal spraying nozzle 25, a rolling head 26, a variable amplitude rod 27, a flange 28, a shell 29, a transducer 30, a second cover plate 31, a second slider 32, a second screw rod 33, a third cover plate 34, a PCB circuit board 35, a fourth cover plate 36, a nut 37, a battery, a sleeve 38, a shell 39, a supporting sleeve 40 and a device.

Detailed Description

It is noted that the following detailed description is exemplary and is intended to provide further explanation of the invention at unless otherwise indicated.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up," "down," "left," and "right" in this application, if any, merely indicate an upward, downward, leftward, and rightward direction as compared to the drawings themselves, and not as a limitation on the structure, but merely as a matter of convenience in describing and simplifying the disclosure, and do not indicate or imply that the devices or elements so referred to must be oriented in a particular manner, constructed and operated in a particular manner, and therefore should not be considered limiting of the application.

Terms such as "mounted," "connected," "fixed," and the like in this application are to be construed , and for example, they may be fixed, detachable, or , they may be mechanically, electrically, directly or indirectly connected through an intermediate medium, they may be connected internally or in an interactive relationship with each other, and those skilled in the art will understand that they have the specific meanings given herein according to their specific situation.

As introduced by the background technology, the defects of easy scratching of the processing surface, damage to the integrity of the coating and low rolling processing efficiency exist in the prior art, and in order to solve the technical problems, the invention provides in-situ ultrasonic rolling integrated devices and methods for thermal spraying.