CN104875120A - Abrasive water jet mirror turning experimental device - Google Patents

Abstract

An abrasive water jet mirror turning experimental device is mainly composed of an abrasive water jet device, a displacement measuring device, a fixture device and the like. Among them, the abrasive water jet device is composed of a water jet processing platform, an ultra-high pressure system, a sand cutting system, a five-axis water cutting system, an automatic abrasive supply system, a soft water treatment system and an oil cooling system. The fixture device is composed of clamping parts, clamping blocks, rods, connecting blocks, supporting plates and base plates. The displacement measuring device is composed of an infrared sensor, a conditioner and a computer. Through this device for turning engineering ceramic materials, the abrasive jets ejected from the double high-pressure nozzles mirrored on the left and right sides of the workpiece material can realize crack-free processing of high-hard and brittle ceramic materials to improve their comprehensive performance and use. In addition, the impact force of the left and right jets on the workpiece can be offset by each other, thereby improving the rigidity of the system, reducing the elastic deformation of the workpiece, and avoiding problems such as easy deformation during processing.

Description

Abrasive water jet mirror turning experimental device

technical field

The invention relates to an experimental device for abrasive water jet mirror turning, in particular to an experimental device for abrasive water jet mirror turning of engineering ceramic materials, through which the engineering ceramic materials are turned.

Background technique

Engineering ceramic materials (alumina, zirconia, etc.) have excellent properties such as high hardness, high strength, corrosion resistance, wear resistance, heat insulation, and good chemical stability. They are used in military, aerospace, atomic energy, space technology, and manufacturing fields. Applications are increasingly widespread. However, due to the inherent properties of high hardness, high brittleness and low fracture toughness of engineering ceramic materials, its processing technology is much worse than other materials, and it is easy to produce small cracks and stress concentration phenomena during mechanical processing, resulting in ceramic parts. The fatigue strength is reduced, which affects the comprehensive performance and service life of ceramic parts.

As a non-traditional cold processing technology, abrasive water jet processing technology has developed rapidly in recent years. Compared with other traditional processing technologies, it has the advantages of no heat-affected zone, no tool wear, small reaction force, wide processing range, high processing flexibility, green environmental protection and simple operation. In the field of precision and micro-processing, abrasive water jet processing technology has continuously improved the accuracy of precision and micro-processing of difficult-to-machine materials such as high hardness and high brittleness, and has broad application prospects.

Aiming at the difficult turning process of engineering ceramic materials, the application of abrasive water jet mirror turning is proposed, which can not only realize the crack-free processing of high-hard and brittle ceramic materials, so as to improve its comprehensive performance and service life, but also through the high-pressure nozzle arranged in mirror image , so that the two jets support each other on the workpiece, thereby improving the rigidity of the system, reducing the elastic deformation of the workpiece, reducing and suppressing the vibration of the process system, so as to avoid problems such as easy deformation during cutting.

Contents of the invention

The purpose of the present invention is to solve the problem that ceramic materials are difficult to process and the problem that turning processing is prone to elastic deformation and vibration. The application of abrasive water jets is used to process ceramic materials. To support the scheme, a device is provided to realize the fine processing of engineering ceramic materials.

In order to achieve the above purpose, the technical solution adopted by the present invention is: the abrasive water jet mirror turning experimental device is mainly composed of an abrasive water jet device, a displacement measuring device and a fixture device.

The above-mentioned abrasive water jet device is composed of a water jet processing platform, an ultra-high pressure system, a sand cutting system, a five-axis water cutting system, an automatic abrasive supply system, a soft water treatment system, and an oil cooling system. Dual high-pressure abrasive water jet nozzles are mirrored on the left and right sides of the workpiece material.

The above-mentioned fixture device is composed of clamping parts, clamping blocks, rods, connecting blocks, support plates and base plates, etc., and is used for connecting the spray gun and the large slide plate of the lathe to realize the clamping and fixing of the spray gun, and at the same time satisfy linear motion in three directions and Rotation around the axis in one direction facilitates the adjustment of the spray gun in all directions, meets the needs of experimental parameter adjustment, and ensures smooth processing.

The above-mentioned displacement measurement device is composed of an infrared sensor, a conditioner and a computer, etc., and is used to collect the displacement signal of the workpiece. The signal is amplified and filtered by the conditioner, and then input to the displacement acquisition card. The displacement analysis software collects and analyzes the data to obtain the corresponding cutting data. Workspace displacement under the condition.

The beneficial effect of the present invention is that, using the abrasive water jet mirror turning experimental device, the problem of difficult machining of ceramic materials can be solved through abrasive water jet processing of ceramic materials, and the comprehensive performance and service life of ceramic parts can be improved. The arranged high-pressure nozzles make the two jets support each other, thereby improving the rigidity of the system, reducing the elastic deformation of the workpiece, reducing and suppressing the vibration of the process system, so as to avoid problems such as easy deformation during cutting.

Description of drawings

Figure 1 is a schematic diagram of the experimental device for abrasive water jet mirror turning.

In the figure 1. Large slide plate of lathe, 2. Fixture device, 3. Middle slide plate of lathe, 4. High-pressure nozzle, 5. Sand inlet pipe, 6. Sand bucket, 7. Top, 8. Infrared sensor, 9. Three-jaw chuck .

Fig. 2 is a schematic diagram of the structure of the fixture device.

In the figure 1. Clamping piece, 2. Clamping block, 3. Rod 1, 4. Rod 2, 5. Connection block, 6. Support plate, 7. Base plate.

specific implementation plan

According to Figure 1, the abrasive water jet mirror turning experimental device is mainly composed of an abrasive water jet device, a displacement measurement device and a fixture device. The water is pressurized to ultra-high pressure through the supercharger, and then enters the mixing chamber of the high-pressure nozzle 4 through the small-hole water nozzle to form a high-speed water jet, and a certain degree of vacuum is generated in the mixing chamber. The bucket 6 is sucked into the mixing chamber through the sand inlet pipe 5, produces violent turbulent diffusion and mixing with the water jet, forms a high-speed abrasive jet, and acts on the ceramic material workpiece through the abrasive nozzle at a very high speed. The abrasive jets ejected from the two high-pressure nozzles 4 arranged as mirror images of the workpiece material can not only support each other, offset part of the cutting force to reduce workpiece deformation, but also realize fine processing of ceramic materials. The ceramic workpiece adopts the clamping method of three-jaw chuck 9 and top 7, one clamping one top, and there is a gasket at the bottom of the turning tool to adjust the top 7 to align with the center of the workpiece. The infrared sensor 8 is fixed on the high-pressure nozzle 4 to collect the workpiece displacement signal, and through the steps of transmission, processing and analysis, the workpiece displacement under the corresponding working conditions is obtained. The clamping device includes a clamping piece 1, a clamping block 2, rods 3, 4, a connecting block 5, a support plate 6, a base plate 7 and the like. Among them, the rods 3, 4, the support plate 6 and the base plate 7 are all provided with a scale scale, which is used for clamping and fixing the high-pressure nozzle 4, and simultaneously satisfies the linear motion in three directions and the rotation around the axis in one direction, so that it is convenient for each Accurate adjustment of direction ensures smooth processing.

The abrasive water jet mirror turning experimental device is mainly used for the fine processing of ceramic materials, so before the abrasive water jet mirror turning of ceramic materials, the ceramic materials are firstly processed by ordinary turning, and the surface after processing at this time is obtained. The roughness and machining deformation of the workpiece are compared with the following abrasive water jet mirror turning.

When using the abrasive water jet mirror turning experimental device to process ceramic materials, first of all, according to the processing requirements, the type of abrasive should be reasonably selected, and the process parameters such as injection pressure, abrasive flow rate, and injection target distance should be set. Then assemble and connect the clamp device 2 and the high-pressure nozzle 4 according to the design requirements in Fig. 1 . Among them, the high-pressure nozzle 4 is a nozzle group composed of two high-pressure nozzles. The high-pressure jets ejected by the two nozzles not only support each other, but also realize fine processing of the workpiece material. Therefore, it should be ensured that the process parameters of the two nozzles are the same, and the mirror image is arranged on both sides of the workpiece.

After processing, cut off all power, clean up the processing site, disassemble each device, clean and dry each part, and place it for the next processing.

Claims (4)

1. an abrasive water jet traffic mirroring turning experiment device, primarily of compositions such as abrasive water-jet device, displacement measuring device and grip devices.It is characterized in that: described abrasive water-jet device by water jet machining platform, extra high voltage system, add sand diced system, five axle Water Cutting systems, the automatic supply system of abrasive material, soft brush treatment system and oil cooling system etc. and jointly form.Wherein, two high-pressure grinding material water jet nozzle mirror-image arrangement is in the workpiece material left and right sides.

2. abrasive water jet traffic mirroring turning experiment device according to claim 1, it is characterized in that: described grip device is made up of clamping element, clamp, rod member, contiguous block, gripper shoe and substrate etc., wherein substrate is fixed on lathe big slide plate by screw, clamp adopts with rod member and welds, and rod member, gripper shoe and substrate are equipped with graduated scale.

3. abrasive water jet traffic mirroring turning experiment device according to claim 1, is characterized in that: displacement measuring device is made up of infrared ray sensor, conditioner and computer etc., and its Computer is same computer and is industrial computer.

4. abrasive water jet traffic mirroring turning experiment device according to claim 1, is characterized in that: described two high pressure nozzles are by grip device mirror-image arrangement on lathe middle slide plate, and the adjustable direction of shower nozzle and angle, nozzle can be replaced according to processing request.