CN211999918U - Composite cladding processing head for preparing laser cladding alloy coating - Google Patents
Composite cladding processing head for preparing laser cladding alloy coating Download PDFInfo
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- CN211999918U CN211999918U CN202020581567.3U CN202020581567U CN211999918U CN 211999918 U CN211999918 U CN 211999918U CN 202020581567 U CN202020581567 U CN 202020581567U CN 211999918 U CN211999918 U CN 211999918U
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Abstract
The utility model provides a composite cladding processing head for preparing a laser cladding alloy coating, which comprises a bracket, a laser cladding head, a high-frequency coil and a nitrogen protection nozzle; the high-frequency coil is arranged below the laser cladding head; the laser cladding head is fixed on the upper part of the bracket and is provided with a powder feeding pipe communicated with a powder feeding pipeline so as to feed powder to a processing surface, and cladding forming is carried out by laser beams; an annular water-cooling copper baffle is arranged between the laser cladding head and the high-frequency coil, an annular silicon steel block is fixed below the annular water-cooling copper baffle, and the high-frequency coil is wound outside the silicon steel block; the silicon steel block is provided with a central hole which penetrates through the silicon steel block from top to bottom, and a high-frequency heat source which is formed when the high-frequency coil and the silicon steel block work quickly heats powder which passes through the central hole of the annular water-cooling copper baffle and the central hole of the annular silicon steel block. In this manner, the tendency of the cladding to crack is reduced by the simultaneous heating and closed loop temperature control.
Description
Technical Field
The utility model relates to an alloy coating preparation technical field particularly relates to a composite cladding processing head for laser cladding alloy coating preparation.
Background
A hot rolling transmission roller in a steel mill is a transmission part in the steel production process, one hot rolling production line is composed of a plurality of transmission rollers, the common failure mode of the transmission rollers is surface abrasion caused by steel operation, and rollers near a front-end rolling mill housing can cause roller surface corrosion and thermal fatigue crack due to spraying cooling water on the steel surface.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a composite cladding processing head for preparing a laser cladding alloy coating, which comprises a bracket, a laser cladding head, a high-frequency coil and a nitrogen protection nozzle;
the high-frequency coil is arranged below the laser cladding head;
the laser cladding head is fixed on the upper part of the bracket and is provided with a powder feeding pipe communicated with a powder feeding pipeline so as to feed powder to a processing surface, and cladding forming is carried out by laser beams;
an annular water-cooling copper baffle is arranged between the laser cladding head and the high-frequency coil, an annular silicon steel block is fixed below the annular water-cooling copper baffle, and the high-frequency coil is wound outside the silicon steel block;
the silicon steel block is provided with a central hole which penetrates through the silicon steel block from top to bottom, and a high-frequency heat source which is formed when the high-frequency coil and the silicon steel block work quickly heats powder which passes through the central hole of the annular water-cooling copper baffle and the central hole of the annular silicon steel block.
Preferably, the silicon steel block is in a conical structure with a wide upper part and a narrow lower part.
Preferably, the silicon steel block is provided with a thermocouple for temperature detection.
Preferably, the nitrogen protection nozzles are fixed in pairs below the annular water-cooled copper baffle plate and face the direction of the processing surface.
Preferably, the silicon steel block and the annular water-cooled copper baffle are integrally fixed on the bracket;
preferably, the distance between the bottom of the silicon steel block and the processing surface is kept between 5 and 10mm
Through the above technical scheme of the utility model it is visible, the utility model discloses an it lies in to show beneficial effect:
the silicon steel blocks are kept at the set temperature required by the process through the temperature closed-loop control system, the powder material is heated, and meanwhile, the surface of the cladding area substrate is synchronously preheated, so that the powder material and the cladding area substrate are simultaneously heated by the high-frequency device, and the powder and the substrate (transmission roller) reach certain temperatures before being combined, so that the purpose of reducing cladding stress is achieved, and the tendency of cracking of the cladding layer is reduced.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is the schematic view of the system for preparing the wear-resistant laser cladding coating of the alloy of the transmission roller of the utility model.
Fig. 2 is a schematic view of laser and high-frequency heat source composite cladding in the preparation of the transmission roller alloy wear-resistant laser cladding coating.
In the drawings, the reference numerals have the following meanings:
1-powder feeder 10-cladding head powder feeding pipe
2-Nitrogen storage 11-water-cooled copper baffle for powder feeder
3-nitrogen storage device for protecting molten pool 12-nitrogen protection nozzle
4-1-first stainless steel pipe, 4-2-second stainless steel pipe and 13-silicon steel block
5-1-first resistance wire, 5-2-second resistance wire 14-high frequency coil
6-nitrogen vaporizer 15-support
7-one-to-two powder separator 16-silicon steel block with the height of 5mm from the bottom of the workpiece surface
8-powder feeding tube 17-workpiece rotation direction
9-laser cladding head 18-interaction point of alloy powder material and laser beam
20-composite cladding machining head
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
With the drawings in mind, according to the preferred embodiment of the utility model, a high wear-resisting low friction coefficient alloy coating preparation system is proposed, including powder feeder 1, nitrogen gas supply arrangement, powder feeding pipeline, cladding with nitrogen protection supply arrangement and compound cladding processing head.
The powder feeder 1 is used for feeding powder to the composite cladding processing head through a powder feeding pipeline.
Referring to fig. 1 and 2, the composite cladding processing head 20 is used for performing laser cladding on the surface of the conveying roller, and cladding powder materials on the surface of the conveying roller through circular laser spots to prepare an alloy coating. Referring to fig. 2, reference numeral 1 denotes an interaction point of the alloy powder material and the laser beam, and the transport roller keeps rotating during the cladding process, so that the cladding track on the surface of the transport roller is a spiral line.
As shown in fig. 1, the powder feeding pipeline includes a flexible powder feeding pipe connected between the powder feeder 1 and the nitrogen protection nozzle 12 below the composite cladding processing head 20. The flexible powder feeding pipeline comprises a first annular heater sleeved on the flexible powder feeding pipeline and used for preheating conveyed powder.
Preferably, the first annular heater comprises a first stainless steel pipe 4-1 sleeved on the flexible powder feeding pipeline and a resistance wire 5-1 wound on the outer surface of the first stainless steel pipe 4-1, wherein a temperature detection device, such as a thermocouple, is further arranged on the first stainless steel pipe and is used for detecting the preheating temperature.
As shown in fig. 1, the nitrogen gas supply device is configured to supply nitrogen gas shield gas to the powder feeder 1 and to supply nitrogen gas shield gas to the processing surface of the composite cladding processing head 20 through the cladding nitrogen gas shield supply device, so as to realize nitrogen gas environment protection. Wherein the cladding nitrogen shield supply device comprises a gas pipeline connected to a nitrogen shield nozzle. A nitrogen vaporizer 6 is provided in the gas line. The input end of the gas pipeline is communicated with a gas source of the nitrogen supply device, and the output can be controlled by a flow meter or a solenoid valve. The output end of the gas pipeline is communicated with the nitrogen protection nozzle.
And a second annular heater is also arranged in the gas pipeline and used for preheating the conveyed nitrogen protection gas.
Preferably, the second annular heater has the same structure as the first annular heater, and comprises a second stainless steel tube 4-2 sleeved on the gas pipeline and a resistance wire 5-2 wound on the outer surface of the second stainless steel tube 4-2, wherein a temperature detection device, such as a thermocouple, is further arranged on the second stainless steel tube for detecting the preheating temperature.
Therefore, nitrogen protective gas introduced into the action positions of the coaxial powder feeding and cladding processes is synchronously preheated, so that the temperature control is realized, the laser cladding effect is optimized, and the cladding layer crack tendency is reduced.
Preferably, the length of the first stainless steel pipe and the second stainless steel pipe is 0.5-1m, so that the heating requirement is met, and the installation obstacle caused by overlong length is avoided.
Preferably, the flexible powder feeding pipeline is made of high-temperature-resistant plastic pipe, such as flexible plastic pipe which can resist temperature of 200 ℃.
In an alternative embodiment, the closed loop temperature control is formed in the process of detecting the temperature of the first and second ring heaters for real-time temperature feedback, wherein the temperature of the first and second ring heaters is controlled at 100-150 ℃.
As shown in fig. 1 and 2, the composite cladding processing head 20 includes a laser cladding head 9 provided with a powder feeding pipe 10 communicated with a powder feeding pipe for feeding powder to the surface of the transfer roller, and a high-frequency coil 14 disposed below the laser cladding head for cladding by a laser beam.
As shown in fig. 1, a one-to-two powder distributor 7 is further disposed in the powder feeding pipeline to divide the powder material into two paths, and the two paths are respectively fed into the powder feeding pipes of the laser cladding head 9.
As shown in fig. 1, the composite cladding processing head 20 is provided with a support 15 providing support for the entire composite cladding processing head, wherein the laser cladding head 9 is fixed on the upper part thereof. An annular water-cooling copper baffle 11 is arranged between the laser cladding head 9 and the high-frequency coil 14, and the silicon steel block is fixed on the annular water-cooling copper baffle and then integrally fixed on the bracket 15. A silicon steel block 13 is fixed below the annular water-cooling copper baffle 11, and a high-frequency coil 14 is wound outside the annular silicon steel block, so that the high-frequency coil heats the silicon steel block to form a high-frequency heat source when working. Particularly preferably, the temperature of the silicon steel block is controlled at 250-400 ℃ by temperature feedback.
The annular silicon steel block is preferably in a conical structure with a wide top and a narrow bottom, and a center hole penetrating from top to bottom is formed in the center of the annular silicon steel block, so that a high-frequency heat source formed when the high-frequency coil works can quickly heat powder materials passing through the center of the annular water-cooling copper baffle and the center hole of the annular silicon steel block.
The embodiment of the utility model provides an it carries out quick induction heating to preferably adopt the silicon steel piece to heat the powder that the center passes through its heat radiation, as shown in fig. 2, in the further example, still through the distance of control silicon steel piece bottom and transmission roller surface, for example at 5-10mm, further carry out the heat radiation through the silicon steel piece to the transmission roller surface of bottom, carry out the auxiliary heating and handle, further realize temperature control, reduce coating crack tendency and improve the oxidative erosion who resists under the high temperature operational environment.
Meanwhile, in order to prevent the high-temperature silicon steel block from thermally radiating and damaging the laser cladding head, an annular water-cooling copper baffle plate 11 is arranged between the high-frequency coil and the laser cladding head for protection and is used as a fixing mechanism of the silicon steel block.
As shown in fig. 1 and 2, the nitrogen shield nozzle indicated by reference numeral 12 faces the working surface and communicates with a gas line of the cladding nitrogen shield supply device.
Preferably, the nitrogen gas supply device includes a nitrogen gas storage 2 for powder feeder and a nitrogen gas storage 3 for molten pool shield for supplying nitrogen gas to the powder feeder 1 and nitrogen gas to the nitrogen gas shield supply device for cladding, respectively.
In fig. 2, w represents the rotation direction of the workpiece, and v represents the cladding movement direction.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (6)
1. A composite cladding processing head for preparing a laser cladding alloy coating is characterized by comprising a support, a laser cladding head, a high-frequency coil and a nitrogen protection nozzle;
the high-frequency coil is arranged below the laser cladding head;
the laser cladding head is fixed on the upper part of the bracket and is provided with a powder feeding pipe communicated with a powder feeding pipeline so as to feed powder to a processing surface, and cladding forming is carried out by laser beams;
an annular water-cooling copper baffle is arranged between the laser cladding head and the high-frequency coil, an annular silicon steel block is fixed below the annular water-cooling copper baffle, and the high-frequency coil is wound outside the silicon steel block;
the silicon steel block is provided with a central hole which penetrates through the silicon steel block from top to bottom, and a high-frequency heat source which is formed when the high-frequency coil and the silicon steel block work quickly heats powder which passes through the central hole of the annular water-cooling copper baffle and the central hole of the annular silicon steel block.
2. The composite cladding processing head for laser cladding alloy coating preparation as claimed in claim 1, wherein said silicon steel block is a tapered structure with a wide top and a narrow bottom.
3. The composite cladding processing head for laser cladding alloy coating preparation as claimed in claim 1, wherein said silicon steel block is provided with a thermocouple for temperature detection.
4. The composite cladding processing head for laser cladding alloy coating preparation of claim 1, wherein said nitrogen shield nozzles are fixed in pairs below an annular water-cooled copper shield and towards the processing face.
5. The composite cladding processing head for laser cladding alloy coating preparation of claim 1, wherein the silicon steel block is integrally fixed to a support with an annular water-cooled copper shield.
6. The composite cladding processing head for laser cladding alloy coating preparation as claimed in claim 1, wherein a distance of 5-10mm is maintained between the bottom of the silicon steel block and the processing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020581567.3U CN211999918U (en) | 2020-04-18 | 2020-04-18 | Composite cladding processing head for preparing laser cladding alloy coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020581567.3U CN211999918U (en) | 2020-04-18 | 2020-04-18 | Composite cladding processing head for preparing laser cladding alloy coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211999918U true CN211999918U (en) | 2020-11-24 |
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ID=73415592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020581567.3U Active CN211999918U (en) | 2020-04-18 | 2020-04-18 | Composite cladding processing head for preparing laser cladding alloy coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211999918U (en) |
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2020
- 2020-04-18 CN CN202020581567.3U patent/CN211999918U/en active Active
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