1. A processing method of a wear-resistant layer on the surface of a spiral shaft for electronic glass is characterized by comprising the following steps,

step 1, heating a screw shaft to be processed to 700-800 ℃;

step 2, moving the plasma spray gun around the screw shaft to be processed, and spraying alloy powder on the heated processing part of the screw shaft to be processed;

and 3, cooling the sprayed spiral shaft to form a wear-resistant layer on the surface of the spiral shaft.

2. The processing method of the wear-resistant layer on the surface of the screw shaft for the electronic glass, as recited in claim 1, wherein in the step 1, the surface of the screw shaft to be processed is cleaned before heating, so as to remove oil stains and rust impurities on the surface of the screw shaft to be processed.

3. The processing method of the wear-resistant layer on the surface of the screw shaft for electronic glass as claimed in claim 1, wherein in step 1, the two ends of the screw shaft to be processed are respectively placed on a fixed frame before heating, and the processed part of the screw shaft to be processed is suspended.

4. The method for processing the wear-resistant layer on the surface of the spiral shaft for the electronic glass, as recited in claim 1, wherein in the step 1, the heating mode is electromagnetic induction coil heating.

5. The processing method of the wear-resistant layer on the surface of the screw shaft for the electronic glass as claimed in claim 1, wherein in the step 2, the heating temperature of the screw shaft to be processed is kept at 700-800 ℃ during the spraying process of the plasma spray gun.

6. The processing method of the wear-resistant layer on the surface of the spiral shaft for the electronic glass, as recited in claim 1, wherein the plasma spray gun spraying process in the step 2 comprises the following steps,

step 2.1, heating the screw shaft to be processed to 700-800 ℃ by adopting an electromagnetic induction coil, wherein the heating range is 20-40 mm of the axial length of the screw shaft to be processed;

step 2.2, spraying alloy powder on the surface of the spiral shaft to be processed heated in the step 2.1 by using a plasma spray gun until the thickness of the coating formed by spraying reaches 1-2 mm;

and 2.3, continuously moving the electromagnetic induction coil forwards, and repeating the steps.

7. The method for processing the wear-resistant layer on the surface of the spiral shaft for the electronic glass, as recited in claim 1, wherein the alloy powder is tungsten carbide.

8. The processing method of the wear-resistant layer on the surface of the spiral shaft for the electronic glass, as recited in claim 1, wherein the thickness of the wear-resistant layer is 1-2 mm.

9. The processing method of the wear-resistant layer on the surface of the spiral shaft for the electronic glass, as recited in claim 1, wherein in the step 3, the sprayed spiral shaft is naturally cooled at room temperature.

10. The screw shaft surface wear-resistant layer for the electronic glass is characterized by being formed by processing based on the processing method of the screw shaft surface wear-resistant layer for the electronic glass, disclosed by any one of claims 1 to 9.

Background

The screw feeder is a feeding device commonly used in the glass industry, and generally comprises a driving device, a head section, a middle section, a tail section, a head-tail bearing, a feeding and discharging device and the like. The screw is the main component of the machine and consists of a shaft and a helical blade welded to the shaft. The helical blade is the same as the thread and can be divided into a left-handed type and a right-handed type. The spiral blade has more types, most commonly is a solid spiral, and the type has wider application, simple structure and high feeding efficiency and is most suitable for bulk materials.

The surface of mechanical parts is coated with one or more layers of metals of the same or different materials by welding, which is called build-up welding. In the prior art, the surface material of the helical blade adopts a method of manufacturing the surface of the additional 1Cr13 movable blade by pure carbon steel or stainless steel, but the surfacing surface has uneven quality and unevenness, and is easy to fall off locally, and particularly, fallen impurities bring serious influence on the quality of a glass product.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a screw shaft surface wear-resistant layer for electronic glass and a processing method, which are suitable for processing the screw shaft surface wear-resistant layer for a batch feeder of an electronic glass kiln.

In order to achieve the purpose, the invention provides the following technical scheme:

a processing method of a wear-resistant layer on the surface of a spiral shaft for electronic glass comprises the following steps,

step 1, heating a screw shaft to be processed to 700-800 ℃;

step 2, moving the plasma spray gun around the screw shaft to be processed, and spraying alloy powder on the heated processing part of the screw shaft to be processed;

and 3, cooling the sprayed spiral shaft to form a wear-resistant layer on the surface of the spiral shaft.

Preferably, in the step 1, the surface of the screw shaft to be processed is cleaned before heating, so that oil stains and rust impurities on the surface of the screw shaft to be processed are removed.

Preferably, in step 1, both ends of the screw shaft to be processed are respectively placed on the fixing frame before heating, and the processing part of the screw shaft to be processed is suspended.

Preferably, in step 1, the heating mode is electromagnetic induction coil heating.

Preferably, in the step 2, the heating temperature of the screw shaft to be processed is kept at 700-800 ℃ in the spraying process of the plasma spray gun.

Preferably, in step 2, the plasma spray gun spraying process specifically comprises the following steps,

step 2.1, heating the screw shaft to be processed to 700-800 ℃ by adopting an electromagnetic induction coil, wherein the heating range is 20-40 mm of the axial length of the screw shaft to be processed;

step 2.2, spraying alloy powder on the surface of the spiral shaft to be processed heated in the step 2.1 by using a plasma spray gun until the thickness of the coating formed by spraying reaches 1-2 mm;

and 2.3, continuously moving the electromagnetic induction coil forwards, and repeating the steps.

Preferably, the alloy powder is tungsten carbide.

Preferably, the thickness of the wear-resistant layer is 1-2 mm.

Preferably, in step 3, the sprayed screw shaft is naturally cooled at room temperature.

The screw shaft surface wear-resistant layer for the electronic glass is processed and formed based on any one of the processing methods of the screw shaft surface wear-resistant layer for the electronic glass.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention discloses a processing method of a wear-resistant layer on the surface of a spiral shaft for electronic glass, which is characterized in that a process method of heating the spiral shaft to be processed firstly is adopted, so that rapid cooling generated by high-temperature particle beams and a matrix reaching a low temperature is avoided, and the problem of great thermal stress generated in a cladding layer is solved. By adopting the process treatment method of plasma flame spraying and workpiece preheating, the problem of uneven crystal particle size caused by rapid cooling after the high-temperature tungsten carbide coating meets a wear-resistant layer matrix is avoided, the crystal structure generated by the process method is more stable, the surface is smoother and smoother, a compact and wear-resistant metallurgical bonding layer is formed, the hardness reaches about 60HRC, and the service life of the screw shaft is prolonged.

Furthermore, the screw shaft to be processed is heated through the magnetic induction coil, the heating mode is different from the external heating mode of common flame or heating wires from inside to outside, the heating body is heated more uniformly, and the problem that the local heating is not uniform due to the complex structure is avoided.

Drawings

Fig. 1 is a flow chart of a processing method of a surface wear-resistant layer of a screw shaft for electronic glass according to an embodiment of the invention.

Detailed Description

The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.

The invention aims to provide a process method and application of plasma spraying on the surface of a spiral shaft for electronic glass. The tungsten carbide wear-resistant layer has excellent wear resistance and high material maturity.

Plasma spraying is another coating process, and is characterized by that the ion arc is a compressed electric arc whose arc column is fine, current density is large, gas ionization degree is high, temperature is high, energy is concentrated and arc stability is good, and the working gas is heated by electric arc between cathode and nozzle to make all or part of the working gas be ionized, then the working gas is sprayed out from nozzle to form plasma flame (or plasma jet), and the spraying material is heated to molten or semi-molten state, and blown into fine granules, and sprayed on the surface of base material by means of high-speed air flow so as to form a coating layer.

The process method of heating the spiral shaft firstly avoids the rapid cooling generated by high-temperature particle beams and low-temperature matrixes, and solves the problem of generating great thermal stress in the cladding layer. The process treatment method of plasma flame spraying matched with workpiece preheating avoids the problem of uneven crystal particle size caused by rapid cooling after a high-temperature tungsten carbide coating meets a wear-resistant layer matrix, the crystal structure generated by the process method is more stable, the surface is smoother and smoother, a compact wear-resistant metallurgical bonding layer is formed, the hardness reaches about 60HRC, and the service life of the screw shaft is prolonged.

As shown in FIG. 1, the invention provides a process method for plasma spraying on the surface of a spiral shaft for electronic glass, which comprises the following specific process steps:

the first step is as follows: cleaning the surface of the screw shaft to remove oil stains, rust and other impurities on the surfaces of the screw shaft and the blades;

the second step is that: two fixed clamping jaws are additionally arranged on two end faces of the screw shaft, and the clamping jaws are respectively placed on a special fixed frame to suspend the processing area of the screw shaft in the air;

the third step: a single-coil electromagnetic induction coil surrounds the periphery of the spiral shaft, the induction coil is not in contact with the spiral shaft, and the spraying process is started when the spiral shaft is heated to about 700-800 ℃. The temperature higher than 800 ℃ is just the process of transforming martensite to austenite, and the temperature lower than 800 ℃ does not cause the change of crystal phase, and simultaneously the maximum heating effect is realized.

The fourth step: the screw shaft is arranged on the fixing frame, the surrounding space of the screw shaft is open, the plasma spray gun can move up and down and left and right, the electromagnetic induction coil heats the screw shaft to 700-800 ℃, and the heating range is 20-40 mm in axial length.

The fifth step: and (3) spraying WC (tungsten carbide) alloy powder on the surface of the spiral by using atmospheric plasma spraying equipment until the thickness of the coating reaches 1-2 mm. The electromagnetic induction coil continuously moves forwards, the steps are repeated to heat the screw shaft in the range of the next stage, and the local part of the screw shaft can be repeatedly heated until the part reaches the spraying process temperature;

and a sixth step: and naturally cooling the sprayed spiral shaft at room temperature.

The heating mode adopted by the invention is an electromagnetic induction coil type heating mode, and a direct heating mode in a non-flame or heating wire mode and the like. The spiral shaft is heated through the electromagnetic induction coil, the heating mode is different from the external heating mode of general flame or heating wires from inside to outside, the heating body is heated more uniformly, and the problem that the local part caused by the complex structure is heated non-uniformly is avoided.