JP2821839B2 - How to clean machine parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning various machine parts machined by using a water-soluble cutting agent to remove cutting oil and impurities adhered during machining.

[0002]

2. Description of the Related Art Conventionally, various machine parts have been manufactured and machined by machining such as cutting and drilling by a machine tool, and a predetermined machine has been manufactured. When machining machine parts, water-soluble cutting oil is generally used. Since cutting oil adheres to the machined parts and metal powder such as cutting chips also adhere, In addition, it was necessary to clean the parts to remove the attached cutting oil, metal powder, and other impurities.

[0003] Conventionally, cleaning of parts after such machining is as follows.
A chlorinated solvent such as trichloroethane or trichloroethylene or a solvent such as chlorofluorocarbon is used. However, chlor-based solvents are suspected of being carcinogenic, and the use of chlorofluorocarbon has been discontinued as a substance that destroys the global environment. Therefore, there has been a strong demand for cleaning means that can replace these solvents.

[0004]

SUMMARY OF THE INVENTION According to the present invention, cutting oil and impurities adhering to machine parts can be effectively removed without using a conventional chlorinated solvent or chlorofluorocarbon.
Moreover, the cleaning liquid to be adhered is reused without being discarded so that the resources can be effectively used.

[0005]

Means for Solving the Problems In order to solve the above problems, a means adopted by the present invention is a cleaning method for cleaning a machine part machined using a water-soluble cutting agent with warm water. In the cleaning tank for cleaning the mechanical parts with hot water, an impurity removing circuit including an impurity removing device and a cutting agent separating means is provided, and a part of the hot water is constantly circulated to the impurity removing circuit.
The impurities are removed and the cutting agent is separated, and the impurity removing device of the cleaning tank is equipped with a pressure receiving plate and an impurity removing element formed by laminating a large number of disk-shaped cloths that keep the washing oil at a cleanliness of NAS class 8 or higher. Cartridge while holding between support plate
Stored in a container and inserted freely into the main casing
Filter on the underside of the cartridge container.
Over-action and packing action when clogged
A method for cleaning machine parts, wherein a filter paper is fixed .

[0006]

[Action] Machine parts machined with a water-soluble cutting agent are washed with hot water containing a rust inhibitor. The hot water is constantly filtered by the NAS (National Aerospac)
eStandard) While suppressing the water content to grade 8 or higher, the mixed oil is removed by oil-water separation means. The temperature of the hot water is suitably about 45 ° C. As for the warm water, chemical oxygen consumption (COD) gradually rises with washing, but CO2
Since water having a high D has a large rust-preventive effect, its function as a cleaning liquid is improved. As a result, it can be used as a raw material of a water-soluble cutting agent, and the washing hot water can be used endlessly without being discarded.

[0007]

According to the present invention, it is possible to clean a machined part using a water-soluble cutting agent without using a solvent such as crawl or chlorofluorocarbon or the like to remove impurities such as cutting oil and metal powder adhered to the machined part. Since the hot water can be reliably removed and the used hot water does not need to be discarded, it is possible to effectively use resources and prevent pollution.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. The drawing shows the steps of the cleaning method according to the present invention. In the drawing, (1) denotes a cleaning tank, which is cleaned with warm water to remove attached water-soluble cutting agents and impurities such as metal powder. The machine parts that have been cleaned do not have fats and oils attached to them, and impurities such as metal powders are suppressed to a certain degree of contamination or less. There is no danger of leakage of hydraulic oil and the like, and since there is no adhesion of oils and fats, painting or printing on parts can be performed without any trouble.

The temperature of the hot water in the washing tank (1) is preferably 45 ° C. or higher, and a rust preventive is added and the cleanliness is maintained at NAS class 8 or higher.

[0010] The hot water in the cleaning tank (1) needs to be cleaned and controlled so that the number and size of impurities contained therein are always kept below a certain level. The cleanliness of hot water is N
It is desirable that the class be 8 or higher in the determination of the AS class.
As a result, impurities adhering to the machine parts after cleaning are reduced to NA.
It can be maintained at S class 8 or higher. If the cleanliness of the hot water is lower than NAS class 8, the presence of impurities adhering to the washed machine parts may reduce the performance of the assembled machine or cause leakage.

In order to maintain the cleanliness of the hot water in the cleaning tank (1) to be NAS class 8 or higher, the cleaning tank (1) is provided with an impurity removing circuit (3) including an impurity removing device (4). A part of the warm water in the washing tank (1) is always circulated to the circuit (3) to remove impurities. In this way, the hot water in the cleaning tank (1) can remove impurities in accordance with the speed at which it is contaminated by cleaning, and the cleanliness in the cleaning tank (1) is always kept below a certain level. It is possible to keep. As the impurity removing device (4) incorporated in the circuit (3), a filtering device disclosed by the applicant of the present invention in the prior art in Japanese Patent No. 1543861 and provided on the market under the name of "Neflon (trademark)" is preferable. Impurity removing device constituted by such a filtering device
(4) As shown in FIGS. 2 to 4, a plurality of cloths are stacked in layers and an impurity removing element penetrating through a passage (6) at the center.
(5) is housed in a cylindrical main body casing (7), and a side wall of the main body casing (7) has an inflow pipe of a circuit (3) for bypassing a part of hot water from the washing tank (1). (8) is connected, and on the lower surface, an extraction pipe (9) communicating with the central passage (6) of the impurity removing element (5) is connected, and the other end of the extraction pipe (9) is connected to the cleaning tank (1). ). The impurity removing element (5) is formed by stacking a large number of thin sheet-like cloths in layers. Hot water enters the layer gap of each cloth from the peripheral side surface of the impurity removing element, flows through the layer gap, and passes through the central passage. Outflow to (6). The impurities contained in the hydraulic oil adhere to the fibers of the cloth during the vortex flowing through the layer gap, and are removed while remaining there. The impurity removing element (5) can remove impurities of 1 micron or more contained in the hydraulic oil.

A pressure receiving plate (10) is provided on the upper surface of the impurity removing element (5), and pressurizes and compresses the impurity removing element (5) in accordance with the inflow pressure of the hot water so that the impurity removing element is locally formed. Prevent crushing. The pressure receiving plate (10) preferably has a contaminated oil introduction hole (11) formed on the side wall at the center thereof.
A smaller-diameter air vent hole (12) is perforated to adjust the pressure applied to the impurity removing element (5) and to remove bubbles present in warm water to remove the impurity (5).
Make sure that millet does not flow through the inside.

The impurity removing element (5) is housed in a cartridge container (13) together with a pressure receiving plate (10) preferably disposed on the upper surface thereof, and can be taken out of the main casing (7). Before use, the cartridge container (13) has a can shape in which the upper and lower surfaces are sealed, and an opening means (15) for forming an opening (14) by tearing is provided on the upper surface, and an extraction pipe ( Lower surface opening (16) communicating with 9)
Is formed by piercing with a needle or the like at the time of use. Reference numeral (17) denotes a support plate for supporting the lower surface of the impurity removing element (5). A center hole (18) communicating with the passage (6) is formed at the center of the support plate (17). The impurity removing element (5) is held between the pressure receiving plate (10) and the support plate (17) by the stopper plug (20) that is implanted with (19) and fixed to the upper surface of the pressure receiving plate (10). You.
A filter paper (21) is fixed to the lower surface of the cartridge container (13), and is interposed between the filter paper (21) and the inner bottom surface of the main body casing (1). Add up. In the cartridge container (13), a required amount of new hot water and a rust inhibitor are stored in advance, and when the impurity removing element is replaced, the reduced hot water and the rust inhibitor can be supplied. The impurity removing element (5) is most simply and appropriately prepared by the method of Patent No. 1484233 previously invented and disclosed by the present applicant, wherein a donut-shaped element is produced from raw paper by a rotating cutting means. Can be manufactured.

A required amount of a rust inhibitor is added to the warm water in the cleaning tank (1) to prevent rusting of mechanical parts, and impurities such as metal powder are removed by the impurity removing device (4). Is maintained at a NAS class 8 or higher cleanliness.

As described above, impurities are removed.
Since the cutting agent mixes and dissolves into the cleaning water as it is washed, it is not sufficient to simply remove impurities, and it is necessary to separate and remove the cutting agent. For this purpose, a circuit having a cutting agent separating device (21) is provided in the cleaning tank (1). Cutting agent separator (21) is made by installing an electrode (22) for electrolysis in the separation tank and electrolysis separates the water and the cutting agent. The separated cutting agent is used again for cutting. Instead of the separation means by electrolysis, oil removal by centrifugation means or gravity may be performed, or these may be used in combination.

The hot water in the cleaning tank (1) can be used as a raw material for a water-soluble cutting agent. Although the COD gradually increases, water having a high COD has a greater rust-preventing effect, and is therefore rather useful as the cleaning solution of the present invention, and there is no need to dispose it. As a result, the water can be used substantially endlessly.

Next, the following table shows the remaining amount of impurities in the cleaning tank (1) from which impurities have been removed by the present invention. The numerical values indicate the number of impurities in 1000 l of the washing water. The grade indicates the NAS class.

[0018]

[Table 1]

As is clear from the above table, it can be understood that the impurities in the cleaning tank (1) are gradually reduced with the passage of the number of days of removal (corresponding to the number of days of use). As a result, no impurities of NAS class 8 or lower were found to adhere to the machine parts cleaned with the warm water in the cleaning tank (1), and it is understood that an extremely good cleaning effect was exhibited. Would.

[Brief description of the drawings]

Fig. 1 Principle explanatory view Fig. 2 Central longitudinal perspective view of impurity removing device Fig. 3 Vertical sectional view of cartridge container including impurity removing element Fig. 4 Exploded perspective view

[Description of References] (1) First cleaning tank (2) Second cleaning tank (3) Impurity removing circuit (4) Impurity removing apparatus (5) Impurity removing element (6) Passage (7) Main casing (8) Inlet pipe (9) Outlet pipe (10) Pressure plate (11) Contaminated oil introduction hole (12) Air vent hole (13) Cartridge container (14) Opening (15) Opening means (16) Bottom opening (17) Support plate (18) Central hole (19) Connecting rod (20) Lock stopper (21) Cutting oil separator (22) Electrode for electrolysis

Claims (1)

(57) [Claims] 1. A cleaning method for cleaning a machine part machined with a water-soluble cutting agent with warm water, the apparatus comprising: a cleaning tank for cleaning the machine part with warm water;
An impurity removing circuit having a cutting agent, and a cutting device having a cutting agent separating means.
Provided the Kezuzai separation circuit becomes to separate the cutting agent to remove the impurities by circulating the cutting fluid separation circuit constantly impurity removal circuit part of the hot water, impurities removal apparatus of the washing tank to wash oil NAS8 Impurity removal elements consisting of a large number of disc-shaped cloths laminated in layers, which maintain a high degree of cleanliness or higher, are stored in the cartridge container while being held between the pressure receiving plate and the support plate, and are inserted freely into the main casing. A method for cleaning mechanical parts, characterized in that a filter paper for performing an initial filtering action and a packing action in a clogged state is fixed to a lower surface of a cartridge container.