CN218767944U

CN218767944U - Laser cladding is with supplementary temperature control device

Info

Publication number: CN218767944U
Application number: CN202222431246.7U
Authority: CN
Inventors: 孙国琴; 张志刚; 李文欣; 孙可元
Original assignee: Gansu Shunyu New Material Technology Co ltd
Current assignee: Gansu Shunyu New Material Technology Co ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2023-03-28
Anticipated expiration: 2032-09-14

Abstract

The utility model discloses a laser cladding is with supplementary temperature control device, its characterized in that: the heating assembly comprises a gas tank, the gas tank is communicated with a heating torch positioned at the bottom of an alloy workpiece to be heated through a gas pipe, the heating torch is supported by a support frame at the bottom, the support frame is adjustable in support range and support height, and an electromagnetic valve is arranged on the gas pipe; the heat insulation component is a ceramic heat insulation belt; the temperature control assembly is an infrared thermometer, the infrared thermometer is electrically connected with the signal input end of the PLC, and the signal output end of the PLC is electrically connected with the electromagnetic valve. The device is used for cladding working conditions with large part size, the heating assembly can preheat the workpiece in advance, the temperature difference between the workpiece before cladding and the workpiece during cladding is reduced, the fusibility is improved, and the internal stress difference is reduced. The ceramic heat preservation belt is used for being wound on the surface of a workpiece after cladding is finished and slowly cooling. The temperature control assembly is used for intelligently controlling the temperature when heating, and is convenient and safe to operate.

Description

Laser cladding is with supplementary temperature control device

Technical Field

The utility model relates to an alloy spare processing equipment field, concretely relates to laser cladding is with supplementary temperature control device.

Background

The laser cladding technology is a new surface modification technology which is developed along with the development of high-power lasers. The laser cladding technology is a novel surface nondestructive repair remanufacturing technology which is characterized in that alloy powder or ceramic powder and the surface of a matrix are rapidly heated and melted under the action of laser beams, and the laser beams are cooled after being removed to form a surface coating which has extremely low dilution rate and is metallurgically bonded with the matrix material, so that the wear resistance, corrosion resistance, heat resistance, oxidation resistance, electrical characteristics and the like of the surface of the matrix are remarkably improved, and the laser cladding technology is widely applied to pump valves, dies and the power industry.

Different model pump bodies of a certain large-scale pump body manufacturing enterprise are in a slurry environment for a long time, more air holes are easily generated under the action of silt scouring, the service life of a new pump body is usually not longer than 40 days, a plurality of abrasion points are generated on the surface, the new pump body is replaced, the abrasion problem is also met, the pump body is frequently replaced, the control cost is not facilitated, and the abraded pump body causes a great amount of waste of resources. Therefore, materials such as copper alloy, titanium alloy, carbide composite powder and the like are clad on the worn part by adopting a laser cladding technology, and the materials are efficiently and accurately redesigned and remanufactured without damage and repair, so that the purposes of reducing the use cost and prolonging the service life are achieved. After the pump body is actually used and clad, the service life of the pump body is prolonged by nearly 2.7 times, and the replacement frequency of the pump body is reduced to a great extent. However, the comparison research on the pump body which is just cladded and the cladding pump body which is in service shows that the cladding pump body generates local longitudinal cracks in the cladding area, and the crack part is often the key area for the pump body to be abraded again, so that the secondary damage speed of the cladding pump body is accelerated. The reason is further found that the joint of the substrate and the cladding layer is easy to generate local longitudinal cracks along the rotation direction of the workpiece under the action of thermal stress due to the large difference of the thermal expansion coefficients of the substrate and the cladding layer, so that the surface quality and the use effect of the workpiece are influenced. Therefore, the elimination of cladding cracks is very important for improving the quality and the service life of the workpiece.

SUMMERY OF THE UTILITY MODEL

The utility model provides a laser cladding is with supplementary temperature control device, the cladding layer surface easily produces the crackle when aim at solves current cladding equipment cladding, causes the problem that work piece quality is not up to standard.

The utility model relates to a laser cladding is with supplementary temperature control device, its characterized in that: the heating assembly comprises a gas tank, the gas tank is communicated with a heating torch positioned at the bottom of an alloy workpiece to be heated through a gas pipe, the heating torch is supported by a support frame at the bottom, the support frame is adjustable in support range and support height, and an electromagnetic valve is arranged on the gas pipe; the heat insulation component is a ceramic heat insulation belt; the temperature control assembly is an infrared thermometer, the infrared thermometer is electrically connected with the signal input end of the PLC, and the signal output end of the PLC is electrically connected with the electromagnetic valve.

Preferably, a plurality of heating heads are arranged on the heating torch.

Preferably, the support frame comprises two sets of symmetrical bracing pieces, and a set of bracing piece includes two articulated barres, is equipped with a plurality of locating holes on the barre, and articulated barre adopts the locating pin to fix through the locating hole.

Preferably, two parallel bottom supports are vertically arranged on the same horizontal line on the upper portion of the supporting frame and used for supporting the heating torch.

Preferably, the bottom of the support frame is provided with a base, the bottom of the base is provided with a bolt, and the size of the bolt is matched with the size of a gap between steel plates of an operating platform of the laser cladding device and is used for fixing the support frame.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model provides a laser cladding is with supplementary temperature control device can be suitable for the great cladding operating mode of part volume. The large size and the large heat capacity of the part result in high cooling speed and high cracking possibility of the cladding layer due to the fact that the cladding layer transfers much heat to the substrate. The heating torch in the heating assembly can preheat a workpiece in advance, the temperature difference between the workpiece before cladding and the workpiece during cladding is reduced, the fusibility is improved, the internal stress difference is reduced, and the generation of surface cracks is directly reduced. And the heating torch can be customized according to different work piece sizes and shapes, and the heating is even, and heating effect is good, is equipped with a plurality of heating heads on the heating torch, can satisfy the preheating demand of different work pieces. The bottom of the heating torch is provided with the support frame, the support frame supporting range is adjustable, the support frame supporting device can be suitable for workpieces with different diameters, the support frame supporting height is adjustable, the support frame supporting device can be suitable for workpieces with different heights, and the support frame supporting device is wide in application, flexible, changeable and convenient to operate.

2. The utility model provides a heat preservation subassembly is ceramic heat preservation area, can carry out slow cooling with its winding at workpiece surface after cladding, and ceramic heat preservation area has advantages such as coefficient of thermal conductivity is low, it is effectual to keep warm, incombustible, waterproof, environmental protection, can reduce workpiece surface internal stress through ceramic heat preservation area to reduce the production of crackle, prolonged the life of work piece, greatly reduced enterprise manufacturing cost.

3. The utility model discloses a accuse temperature subassembly is the infrared ray and penetrates the infrared radiation thermometer in the work piece directly, and infrared radiation thermometer is connected with the signal input part electricity of PLC controller, and the signal output part and the solenoid valve electricity of PLC controller are connected. The preheating temperature is set according to the cladding requirements of different workpieces, when the heating temperature measured by the infrared thermometer reaches the set temperature, a signal is fed back to the PLC, the PLC controls the electromagnetic valve to be closed again, the heating torch stops heating, the temperature is intelligently controlled in the whole process, and the operation is convenient and safe.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the heating torch of the present invention;

FIG. 3 is a schematic view of the structure of the ceramic heat-insulating belt of the present invention;

fig. 4 is a front view of the support frame of the present invention;

fig. 5 is a left side view of the support frame of the present invention;

FIG. 6 is a circuit connection diagram of the present invention;

in the figure: 1-a gas tank; 2-a heating torch; 3-a support frame; 4-ceramic thermal insulation belt; 5-heating the head; 6-a workbench; 7-an electromagnetic valve; 8-a handle bar; 9-a base; 10-bottom support; 11-a positioning hole; 12-bolt.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1-6, the utility model relates to a laser cladding is with supplementary temperature control device, including heating element, thermal insulation component and accuse temperature subassembly, heating element includes gas jar 1, and gas jar 1 communicates with the heating torch 2 that is located the alloy work piece bottom of waiting to heat through the gas pipe, and heating torch 2 provides the support by the support frame 3 of bottom, and support frame 3 support range and support height-adjustable are equipped with solenoid valve 7 on the gas pipe. The support frame 3 comprises two sets of symmetrical bracing pieces, and a set of bracing piece includes two articulated barres 8, is equipped with a plurality of locating holes 11 on the barre 8, and articulated barre 8 adopts the locating pin to fix through locating hole 11. The same water flat line in 3 upper portions of support frame is equipped with two parallel collet 10 perpendicularly, and collet 10 is used for supporting heating torch 2, and 3 bottoms of support frame are equipped with base 9, and the base 9 bottom is equipped with bolt 12, and the 12 sizes of bolt and the gap size phase-match between the laser cladding device operation panel steel sheet for fixed support frame 3, 3 support ranges of support frame and supporting height are adjustable. The heat preservation component is a ceramic heat preservation belt 4. The temperature control assembly is an infrared thermometer, the infrared thermometer is electrically connected with the signal input end of the PLC, and the signal output end of the PLC is electrically connected with the electromagnetic valve 7.

When the device is used, laser cladding parameters are determined by combining a laser cladding track and the complexity of a workpiece, the laser power of preheating treatment and post-treatment is selected according to the laser cladding parameters, the advance time and the heat treatment lag time of laser preheating are determined according to the requirements of the surface stress and the surface hardness of a part, the path length of each laser cladding is determined according to the advance time and the lag time, and each section is subjected to preheating, laser cladding and heat treatment successively.

Taking a cladding nickel-based tungsten carbide coating as an example, the workpiece is a piston cylinder with the diameter of 60mm and the length of 1200mm, the base material is 316L, and the cladding coating is a tungsten carbide coating with a single side of 1.5 mm. Before cladding, removing oil stain and rust on the surface of the workpiece. The workpiece was held on the table 6, and the laser power for the preheating treatment and the post-treatment was selected to be 2800w according to the laser cladding parameters, with the preheating temperature set at 350 ℃. The height of the support frame 3 is adjusted, the main valve of the gas tank 1 is kept in a normally open state, the electromagnetic valve 7 is opened, the heating torch 2 is ignited to heat the surface of a workpiece, when the temperature of the surface of the workpiece measured by the infrared thermometer 7 reaches 350 ℃, a signal is fed back to the PLC, the PLC controls the electromagnetic valve 7 to be closed, and the heating torch 2 stops heating. And then carrying out cladding work, and during the cladding period, if the temperature of the workpiece measured by the infrared thermometer 7 is lower than 330 ℃, feeding back a signal to the PLC controller, controlling the electromagnetic valve 7 to be opened by the PLC controller, starting heating by the heating torch 2, and keeping the temperature of the workpiece. After cladding, immediately winding a ceramic heat preservation belt 4 on the surface of the workpiece to slowly cool the workpiece, thereby reducing the generation of cracks.

Claims

1. The utility model provides a laser cladding is with supplementary temperature control device which characterized in that: the heating device comprises a heating assembly, a heat insulation assembly and a temperature control assembly, wherein the heating assembly comprises a gas tank (1), the gas tank (1) is communicated with a heating torch (2) positioned at the bottom of an alloy workpiece to be heated through a gas pipe, the heating torch (2) is supported by a support frame (3) at the bottom, the support range and the support height of the support frame (3) are adjustable, and an electromagnetic valve (7) is arranged on the gas pipe; the heat insulation component is a ceramic heat insulation belt (4); the temperature control assembly is an infrared thermometer, the infrared thermometer is electrically connected with a signal input end of the PLC, and a signal output end of the PLC is electrically connected with the electromagnetic valve (7).

2. The auxiliary temperature control device for laser cladding of claim 1, wherein: and a plurality of heating heads are arranged on the heating torch (2).

3. The auxiliary temperature control device for laser cladding of claim 1, wherein: the support frame (3) comprises two sets of symmetrical bracing pieces, and a set of bracing piece includes two articulated barres (8), be equipped with a plurality of locating holes (11) on barre (8), articulated barre (8) adopt the locating pin to fix through locating hole (11).

4. The auxiliary temperature control device for laser cladding as claimed in claim 3, wherein: the heating torch is characterized in that two parallel bottom supports (10) are vertically arranged on the same horizontal line on the upper portion of the support frame (3), and the bottom supports (10) are used for supporting the heating torch (2).

5. The auxiliary temperature control device for laser cladding as claimed in claim 3, wherein: the supporting frame is characterized in that a base (9) is arranged at the bottom of the supporting frame (3), a bolt (12) is arranged at the bottom of the base (9), and the size of the bolt (12) is matched with the size of a gap between steel plates of an operating table of the laser cladding device and used for fixing the supporting frame (3).