CN104096696A - Electrostatic eliminating, chip removing and dust sucking device for lost foam casting forming machine - Google Patents

Abstract

The invention relates to a method and device for chip removal, dust suction and static electricity removal of lost foam casting forming machines. The integrated chip removal and dust collection device of blowing and suction includes a dust cover connected to the main shaft of a machine tool; a single ion nozzle can be adjusted through the angle of a ball joint. The adjustment is set on the positioning seat of the machine tool spindle; the gas pipe is connected with the ion nozzle. The method of neutralizing waste ions by high-voltage ions includes generating airflow through an air compressor, and connecting the electrostatic dust removal nozzle to the air outlet. A large number of ions generated by the high-voltage electric field flow with the airflow and contact with foam waste to neutralize foam waste. Charged, and a large amount of foam waste will be blown to the vicinity of the negative pressure vacuum hood by the high-speed airflow, and the waste flying in the air near the cutter will be sucked away by the vacuum hood, and filtered and collected by the dust collection device through the pipeline. The remaining small amount of waste chips falls around the cutting surface with gravity, and the processing is collected uniformly. The blowing and suction integrated device solves the problem of blowing off and collecting waste chips in the prior art, has good effect of chip removal and dust collection, can reduce production cost, and improves processing quality and tool life.

Description

A device for removing static electricity, chip removal and dust collection for lost foam casting forming machine

technical field

The invention relates to a method and device for removing static electricity, chip removal and dust collection for foam processing in lost foam casting technology. Specifically, it relates to a method for neutralizing foam static electricity in debris with high-voltage ions and vacuuming dust with a low-pressure air flow vacuum cleaner, which belongs to special processing field. the

Background technique

Lost foam casting is to bond and combine paraffin or foam models similar in size and shape to castings to form model clusters. After brushing refractory paint and drying, they are buried in dry quartz sand for vibration modeling, and poured under negative pressure to vaporize the model. , a new casting method in which liquid metal occupies the position of the model, solidifies and cools to form a casting. It is a new technology with nearly no margin and precise molding. This technology does not need to take molds, has no parting surface and no sand core, so the casting has no flash, burr and draft angle, and reduces the number of molds caused by the combination of cores. size error. The dimensional accuracy of castings can reach CT7 to 9, which can greatly reduce the cost of machining. Compared with the traditional sand casting method, it can reduce the machining space by 40% to 50%. the

Foam chip dust removal technology is an important part of the lost foam white mold cutting process. During the foam cutting process, the chips will splash around due to the cutting force. Due to the high-voltage electrostatic reaction between the foam and the tool friction, the chip surface is charged and everywhere Paste around the tool and bed, accumulate in deep holes and narrow grooves, affect the normal processing of the tool, easily deform and cause the mold to be deformed, and easily climb into the transmission mechanism such as the screw guide rail and the rack and pinion, reducing the service life of the transmission parts , reduce transmission accuracy. Therefore, the dust removal technology of foam debris is of great significance to the application and development of the lost foam CNC cutting machine. the

CNC cutting technology is a typical representative of lost foam white mold forming method. Its processing cycle is short, flexible, high-precision processing characteristics, and its application range is getting wider and wider. However, this technology in our country is still in its infancy, and it still stays in the application of metal forming machines to cut foam white molds. During the processing process, manpower is required to clean up the waste generated from time to time. During the processing of the casting mold, the collection and treatment of waste chips take up considerable time and increase the production cost. Therefore, the lost foam forming machine urgently needs an efficient dust removal equipment. the

At present, the dust removal methods for non-metallic materials include negative pressure chip suction and high-pressure chip blowing. High-voltage chip blowing uses high-voltage electrostatic dust removal to neutralize waste chips with a lot of static electricity, making it easier to clean and not sticking to the machine bed. This method cannot remove all waste chips. The remaining waste chips will stick to the surroundings of the machine bed due to their static electricity, especially in the gaps of the machine tool. It is not easy to blow and suck chips, and manual cleaning is required. Due to the slight quality of the foam debris and the electrostatic charge on the surface, it will be adsorbed everywhere. At present, there is no special equipment for the characteristics of the lost foam waste on the molding machine. the

The present invention mainly aims at the collection and cleaning of foam waste, and proposes a high-pressure ion nozzle to blow the waste away from deep holes and slits through high-speed airflow, so as to achieve the effect of chip removal, and at the same time neutralize the waste in the waste. The charge is easy to clean, and the blown waste is sucked away by the low-pressure and high-air volume vacuum cleaner through the vacuum hood, and finally achieves the functions of chip removal and dust collection. the

Contents of the invention

In order to achieve the purpose of dust removal, according to the collection and cleaning of foam waste according to the present invention, in view of the fact that the existing negative pressure chip suction and high pressure chip removal cannot prevent the waste chips from splashing and sticking around, a method of blowing high-pressure chips, low-pressure chip suction and electrostatic ionization is proposed. This method introduces electrostatic dust removal rods and air compressors, and the ionization device forms a stable high-voltage electric field under the action of high voltage and low current generated by the high-voltage generator, and ionizes the air to form ions, which are brought by the high-pressure airflow It reaches the surface of the chip to neutralize the static electricity on the surface of the chip, prevent the chip from sticking everywhere inside the machine tool and remove dust. the

The purpose of the present invention can be achieved by the following method, the air flow is generated by the air compressor, the electrostatic dust removal rod is connected to the air outlet, and a large amount of ions generated by the high-voltage electric field flow with the air flow and contact with the foam waste to neutralize the foam. charge. A large amount of foam waste will be immediately discharged to the waste chip collector with the negative pressure chip suction system, and the remaining small amount of waste chips will fall around the cutting surface with gravity, and the negative pressure chip suction system will move with the cutting path of the cutter shaft. The remaining waste is subjected to repeated adsorption and dust removal. the

High-pressure ion wind waste removal method The method of absorbing foam waste mainly includes air compression device, high-pressure ion wind rod, negative pressure dust collection device and other parts. the

Air compression device: It is composed of air compressor, air transmission pipe, air pipe joint and air nozzle mechanism. Air compressors create high pressure by compressing air to create airflow. The air is guided away by the air transmission tube, which can be transmitted inside the spindle, so that the air nozzles can be arranged on both sides of the cutter shaft and can move with the cutter shaft. The direction of the air nozzle can be adjusted to align with the cutter head, so that the ion wind can quickly and accurately reach the foam waste. the

High-voltage ion wind rod device: It is composed of high-voltage ionization device and air pipe joint. The ionization device of the ion fan forms a stable high-voltage electric field under the action of high voltage and low current generated by the high-voltage generator, and ionizes the air to form an ion body. Connect the ion fan to the air compressor through the air pipe joint to generate high-pressure air flow to bring the ionized air out to the surface of the foam waste to neutralize the static electricity on the surface. the

Negative pressure vacuum device: It consists of a dust head, a vacuum tube, and a vacuum cleaner. The dusting head generates pressure from the negative pressure to the normal pressure, sucks the foam waste generated by cutting and the neutralized ion body to the dust suction pipe, and discharges it into the collection device of the vacuum cleaner. the

To sum up, the "high-pressure ion air dust removal method" provided by the present invention has an effective effect of foam cutting and dust removal. Realize the rapid dust suction of the lost foam CNC cutting forming, improve the cutting efficiency, shorten the processing cycle, reduce the labor cost, and obtain higher economic benefits. the

Description of drawings

Fig. 1 is a schematic diagram of the high-pressure ion wind dust suction method of the present invention. the

Figure 2 is a schematic diagram of a ball joint. the

Fig. 3 is a flow chart of chip removal and dust removal of lost foam waste. the

reference sign

10—vacuum cover 20—ventilation connector 30—high voltage ion support 40—power connector 50—ventilation pipe 60—trachea 70—spindle 80—high pressure throttle nozzle 90—spindle head 100—tool 110—workpiece 120—high voltage ion generator 130—ball joint 140—hairbrush.

Detailed ways

The method for dust removal and vacuuming of high-pressure ion nozzles will be further described in detail below in conjunction with the accompanying drawings and specific examples, but this is not intended to limit the present invention. the

See Figure 1, including the machining spindle 90 spindle head and the cutter head 100 installed on the machining spindle, the nozzle is connected to the air pipe 60 inside the main shaft, the air pipe 80 is connected to the air compressor, and the rotation angle of the ball joint 130 is used to adjust the appropriate rear lock tight. The adopted trachea 60 has an inner diameter of 8 mm. The high-pressure ion nozzle fixes the ion differential generating device through the high-pressure ion support, and the ions generated by the ion needle are blown out with the high-speed airflow to blow chips. The size of the airflow is determined by adjusting the flow rate of the air compressor. the

Referring to Fig. 2, the nozzle 80 connects the gas pipe with the nozzle through the ball joint 130, and the hollow ball joint has good sealing performance. the

Referring to Fig. 1, two ventilation pipes 50 are respectively symmetrically distributed on both sides of the main shaft. The diameter of the ventilation pipes is not less than 80mm. The ventilation pipes are connected with the industrial vacuum cleaner. The hairbrush 140 is embedded, and the hairbrush sucks the flying foam dust into the ventilation pipe, and then filters and recycles the waste debris through dust collecting devices such as filtration to release clean air into the atmosphere. the

Referring to Fig. 3, it is a flow chart of discharging dust from lost foam waste. the

A chip removal and dust suction method for lost foam numerical control machining, the method comprises the following steps:

The foam blank is placed on the machine table, and the cutter shaft is controlled by the CNC numerical control system to process the blank. Cutting is generated by the high-speed rotation of the tool and the frictional contact with the foam, generating a large number of small particle foam waste. The nozzle discharges ionized gas, which quickly contacts the foam waste to neutralize the charge on its surface. Because the mass of the debris is very small, the debris is blown from the cutting surface into the air by the wind, and then sucked away by the dust head. By adjusting the regulating valve of the vacuum cleaner to control the size of the air flow, it can absorb foam waste of different sizes due to different cutting depths.

The high-pressure ion nozzle gas blowing chip dust collection method of the present invention is mainly used in the lost foam white mold numerical control processing industry. The above description of the present invention and its embodiments is illustrative, not restrictive. Therefore, if a person of ordinary skill in the art is inspired by it and makes other embodiments without departing from the inventive concept of the present invention, all of them shall belong to the protection scope of the present invention. the

Claims (6)

1. A foam waste chip high-voltage electrostatic chip removal and chip suction device for lost foam casting CNC machine tools, characterized in that it comprises the following steps: a) Set a single high-voltage electrostatic nozzle on the outer cover where the main shaft is installed, and adjust the angle of the nozzle to the position where the cutter head is processing through the rotary joint, and spray dry air; b) The dust cover is symmetrically designed and arranged directly below the main shaft and directly above the cutter head; c) Use the self-designed industrial vacuum device to generate the negative pressure of low-pressure air flow, suck the foam dust flying near the main shaft into the dust collection hood, and filter the debris into the collector through the ventilation pipeline and waste collector, Clean air is released into the atmosphere; A foam chip high-voltage electrostatic chip removal and chip suction device used in the process of lost foam casting according to claim 1, characterized in that the device includes a single high-pressure energy-saving nozzle, an air compressor connected to the nozzle, An industrial vacuum cleaner connected to a hood and a hood. 2. According to the high-voltage electrostatic nozzle described in claim 3, it is ionized before the nozzle is sprayed out of the nozzle by the high-voltage conversion device, and the gas with positive and negative ions is blown to the foam debris with a large amount of ions after processing. 3. There is only one nozzle, which is distributed at a convenient position for the cutter, the closer to the cutter the better, and its high-pressure ion nozzle is placed inside the dust collection hood. 4. The high-voltage ion generating device of the high-voltage electrostatic spraying shown in claim 4 is fixed on the z-axis of the forming machine through the high-voltage ion support. 5. The vacuum hood according to claim 2 is designed according to the structural characteristics of the lost foam molding machine. In order to save space, the opening is a square opening downwards, and a circle of brushes is installed on the lower edge. In order to increase the absorption of foam The pressure does not interfere with the processed foam. 6. The ventilation pipeline according to claim 2, which is connected to the dust collection hood through a ventilation joint, and the diameter of the ventilation pipe is 80mm-120mm.