KR20040096479A - Method and apparatus for forming lubricant film in cold forging - Google Patents

Abstract

PURPOSE: To improve operation efficiency and reduce industrial waste by forming a lubricant film on a material for cold forging by simple apparatus and process. CONSTITUTION: The apparatus comprises a boiling water washing tank (70) in an inner space of which a boiling water washing solution (76) is stored; a coating tank (72) which is installed at one side of the boiling water washing tank, and in an inner space of which a lubricant (78) to be coated on the surface of a material is stored; a drying tank (74) which is installed at one side of the coating tank, and in which a drying means for drying the lubricant coated on the surface of the material is installed; a material receiving drum (100) in which a plurality of materials are received, on which a plurality of fluid passing holes (102) as passageways for entrance and exit of fluid are formed, and which is rotationally installed; a moving means for guiding movement of the material receiving drum so that the material receiving drum is sequentially received in the boiling water washing tank, the coating tank and the drying tank; and a control means (116) installed at one side of the moving means to control movement of the material receiving drum.

Description

Method and apparatus for forming lubricating film for cold forging {METHOD AND APPARATUS FOR FORMING LUBRICANT FILM IN COLD FORGING}

The present invention relates to a method and apparatus for forming a lubricating film, and more particularly, to a method and apparatus for forming a lubricating film by a simple apparatus and process on the surface of a material for cold forging.

Forging refers to the operation of making a solid metal material into a certain shape by hammering or pressing a metallic material with a hammer, and the like. In some cases, the temperature may be a room temperature, but in a material having a high melting point, It is often necessary to heat up somewhat.

In general, forging at a temperature higher than the temperature at which recrystallization proceeds in the material is called hot forging, and forging at a lower temperature is called cold forging. Cold forging, which is processed at a low temperature warm and room temperature rather than hot forging, can achieve high precision, but requires surface lubrication.

In order to make the structure of the solid material uniform and to reduce the size of the crystal grains in the crystal solid, hammering operation is called annealing, and it is gradually pressed with a tool without hammering to give a predetermined shape. The work of making a mold is called a press.

And the working method is ① between the flat tool, freely forging to make the product of the desired shape by turning or changing the position properly, and ② between the mold and the revolving mold in a certain shape. There are two types of forgings that make a product of the desired shape by inserting the material into the material.

Surface lubrication in cold forging is performed in advance to produce a mixed film of zinc phosphate and metal soap, which are metal lubricating films, on the surface of the material in order to increase the lubricity of the product during processing and to prevent sticking with the mold.

The surface lubrication process conventionally performed removes scale formed on the surface by degreasing and pickling, and then chemically treats phosphate to coat the film and neutralizes sodium soap to prevent direct contact with the surface of the material and mold during cold forging. It prevents seizure during molding and keeps mold life long.

Such conventional surface lubrication treatment is sequentially performed by approximately nine processes including degreasing-> washing with water-washing with sulfuric acid-> washing with water-> chemical conversion (zinc phosphate coating)-> washing with water-> neutralizing-> lubrication-> drying. Is done.

The surface lubrication treatment as described above fills the chemicals in the tank for each process, loads the material into the tank filled with chemicals, processes it for the corresponding time, and moves to the next process when it is completed. Take out.

With reference to Figure 1 looks at the conventional surface lubrication process in more detail.

The first process is a degreasing process (S11), the most widely used method in the field of cold forging is alkali degreasing. Alkaline degreasers have the advantage of being inexpensive, effective in removing all contaminants in one operation, and easy to control.

However, alkali degreasing agents must have saponification and emulsifying capabilities, contain colloidal additives, and must be able to be removed from the wash.

The degreasing step (S11) as described above is carried out for about 5 minutes at 60 ℃, after this degreasing step (S11) is subjected to a washing step (S12) for about 1 minute at room temperature.

Next, pickling (S13) is performed at about 40 to 60 ° C. for about 5 minutes. Scales are formed on the surface of iron or steel products manufactured by heat treatment or hot forming. To remove these scales, shot blasting is performed before entering the process. If picked up in the process, pickling is performed.

In the cold forging process, since shot blasting is generally performed, pickling is necessary to increase the surface area of the base to increase the formation of zinc phosphate coating and the weight of the coating to increase the formability of cold forging.

After pickling, the mixture is subjected to washing with water (S14) for about 1 minute at room temperature, and then subjected to chemical conversion (S15). Chemical conversion treatment (S15) is a zinc phosphate coating process and is performed at 80 ° C. for about 5 minutes. Zinc phosphate coating increases the formability during cold forging, and helps the adhesion of soap in the later lubrication process.

The solution used in the zinc phosphate coating process forms a film by attack of free acid on the metal surface and precipitation of phosphate crystals. Therefore, as soon as some iron is dissolved into the solution, iron and zinc phosphate (iron and zinc phosphate) adhere to the steel surface and form a film. Since the specific reaction mechanism of zinc phosphate coating is well known, its detailed description is omitted here.

After the zinc phosphate coating, water washing (S16) for about one minute at room temperature, and the neutralizing (neutralising rinse) step (S17) is performed. The neutralization step (S17) is carried out at 80 ° C. for about one minute, and is a step of treating to increase the effect of soap in the lubrication step (S18), which is a later step.

The solution used for neutral washing must be kept constant by the addition of the indicated concentration. However, even with regular chemicals, neutralized water is gradually contaminated and loses its effectiveness, and therefore the solution must be disposed of regularly.

After the neutralization step (S17), a metal lubrication step (S18) is performed. In the case of cold heading, reactive soap not only produces the lubrication required for single hole sizing or drawing of a calibration pass, but also continues with the subsequent multistage headings. To provide a suitable residual lubricant.

Soap consists of high grade sodium stearates with extended lifespan components, preservatives, reaction additives to promote reaction with phosphate coatings, and salts to overcome curing of water.

The zinc stearate layer provides a hybrid membrane chemically bonded to the metal surface that is effective and resistant to high pressure. The importance of this reaction is very emphasized and the extent of the reaction is influenced by the condition and composition of the lube bath but also by the crystal structure of the phosphate layer coated on the bottom.

As described above, the lubrication process (S18) is preferably carried out for about 5 minutes at 80 ℃, and after the lubrication process (S18) is finished, the drying process (S19) is subjected to.

However, the conventional surface lubrication method as described above is performed by sequentially performing nine processes, there is a problem that the processing time is long because the process is complicated and the number of processes.

In the conventional surface lubrication method, waste water is generated about 7.5 ton / hr, harmful gas is discharged about 645 m 3 / min, and sludge is generated, and a large amount of industrial waste is generated. There was a difficulty.

That is, when the degreasing step (S11) is performed, waste and degreasing wastewater of the inorganic alkali surfactant are generated, and waste such as waste hydrochloric acid and waste sulfuric acid and pickling waste water are generated during the pickling process (S13).

In addition, sludge is generated in the chemical conversion treatment (S15), and chemical waste water (phosphate, acetic acid, zinc, etc.) is generated. And in the lubrication process (S18) there is a problem that waste such as waste stone gum is generated.

In addition, since each of these processes are made by hand, there is a high risk of a safety accident, such as a worker may be burned.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a method for forming a lubricating film for cold forging made by a simpler process.

Another object of the present invention is to provide a lubricating film forming apparatus for cold forging used in a lubricating film forming method for preventing the generation of industrial waste.

1 is a process chart showing a lubricating film forming process according to the prior art.

Figure 2 is a process chart showing the process of performing the surface lubrication treatment by the lubricating film forming method for cold forging according to the present invention.

Figure 3 is a diagram showing the characteristics of the lubricant used in the lubricating film forming method for cold forging according to the present invention.

Figure 4a is a cross-sectional view showing a spike test state for testing the characteristics of the lubricant used in the lubricating film forming method for cold forging according to the present invention.

4B is a graph showing the results obtained by the spike test shown in FIG. 4A.

Figure 5 is a perspective view showing the configuration of a preferred embodiment of the lubricating film forming apparatus for cold forging according to the present invention.

Figure 6 is a schematic diagram of another embodiment of a lubricating film forming apparatus for cold forging according to the present invention.

Explanation of symbols on the main parts of the drawings

60. Test piece 62. Hole

64. Die 66. Press

70.Tangse tank 72.Tank tank

74. Drying tank 76. Hot water

78. Lubricants 80. Supports

82. Horizontal moving mechanism 84. Horizontal rail

86. Horizontal motor 90. Left and right fluid

92. Moving wheel 100. Material container

102. Through hole 110. Vertical movement mechanism

112. Vertical motor 114. Vertical belt

116. Controller m. Material

S50. Poverty stage S52. Application step

S54. Drying stage

The method for forming a lubricating film for cold forging according to the present invention for achieving the above object is to immerse a material to be used for cold forging in a solution at 80 ° C. for 1 minute to wash and preheat the material. A laundering step; Lubrication at 40-60 ° C. in which at least one of the trade names FL-E720, FL-E740, or FL-E760, which was developed by MEC International, Inc. An application step of immersing in the solution for 1 to 3 seconds to form a lubricating film on the surface of the material; Characterized in that it comprises a drying step of drying the lubricant film applied to the surface of the material by the coating step for 1 to 3 minutes.

In addition, the apparatus for forming a lubricating film for cold forging according to the present invention includes: a bath washing tank in which a bath washing liquid is stored and stored in an inner space; A coating tank provided at one side of the bath for washing and receiving and storing a lubricant for coating the surface of the material in an inner space; A drying tank provided at one side of the coating tank and provided with a drying means for drying the lubricant applied to the surface of the material; A plurality of materials accommodated therein, and a plurality of through holes formed as a passage of fluid are formed therein, and a material accommodation passage rotatably installed; Flow means for guiding the movement of the material container such that the material container is sequentially accommodated in the hot water tank, the application tank and the drying tank; It is provided on one side of the flow means, characterized in that it has a configuration including a control means for controlling the movement of the material container.

On the other hand, the method for forming a lubricating film for cold forging according to the present invention, a hot water tank, in which the hot liquid is stored and stored in the internal space; A coating tank provided at one side of the bath for washing and receiving and storing a lubricant for coating the surface of the material in an inner space; A drying tank provided at one side of the coating tank and provided with a drying means for drying the lubricant applied to the surface of the material; A part of which is sequentially entered into the hot water tank, the application tank, and the drying tank, and the conveyor guides the one-way movement of the material; It characterized in that it has a configuration including a power generating means for providing power to the conveyor.

The lubricant provided in the coating tank is characterized in that at least one of the brand name FL-E720, FL-E740 or FL-E760 developed by MEC International Corporation.

The flow means is characterized in that it comprises a vertical movement mechanism for guiding the vertical movement of the material container, and a horizontal movement mechanism for guiding the horizontal movement of the material container.

One side of the material container is characterized in that the rotary motor for forcing the rotation of the material container is further provided.

When the material in the material container is immersed in the hot water in the hot water tank or the lubricant in the application tank, characterized in that the material container is controlled to rotate.

One side of the conveyor is characterized in that the material seating portion is formed is seated.

According to the method and apparatus for forming a lubricating film according to the present invention having such a configuration, the work efficiency is improved and the industrial waste is reduced by a simple process and configuration.

Figure 2 is a schematic view showing a process for performing a surface lubrication treatment by the method for forming a lubricating film for cold forging according to the present invention.

As shown in this, the lubricating film forming method for cold forging according to the present invention is made by a hot water step (S50), application step (S52) and drying step (S54). Although not shown, the hot water washing step S50 is preceded by a shot step of removing foreign matter adhered to the surface by firing fine materials as in the conventional method.

The hot water washing step (S50) is a process of washing and preheating the material, and is performed by immersing the material to be used for cold forging in a solution at 80 ° C. for 1 minute.

The coating step (S52) is a process of forming a lubricating film on the surface of the material, and here is a brand name FL-E720 or FL-E740 or FL-E760, etc. developed by MEC International, Inc. This is used. That is, the coating step (S52) is immersed the material for 1 to 3 seconds in a lubricating solution of 40 ~ 60 ℃ in which at least one of the above brand name FL-E720, FL-E740 or FL-E760 is dissolved And immersion for about 1 second.

Each feature, use and the like of the lubricant are described in detail in FIG. 3.

As described herein, the FL-E720 has a white color, a processing temperature is from room temperature to 70 ° C, and an adhesion amount is about 5 to 15 g / m 2. It has low friction coefficient, good dryness and low hygroscopicity, and is mainly used for sizing, coining, and medium machining.

The FL-E740 has a white color like the FL-E720, and the processing temperature is from room temperature to 70 ° C., and the deposition amount is about 5 to 20 g / m 2. It has excellent workability and is mainly used for medium and steel processing.

The FL-E760 has a black color, a processing temperature is from room temperature to 80 ° C., and an adhesion amount is about 10 to 25 g / m 2. In addition, it has good workability, tool life and heat resistance, and is mainly used for steel processing.

4A and 4B show spike test procedures and results when using the trade names FL-E720, FL-E740, and FL-E760 and the conventional phosphate / soap.

That is, as shown in FIG. 4A, the test piece 60 to which each lubricant is applied is placed on the die 64 in which the holes 62 are formed, and the pressure is applied from the top by the press 66. In this case, a correlation between the spike height introduced into the hole 62 and the molding load applied to the press 66 is illustrated in FIG. 4B.

In FIG. 4B, the symbol '●' indicates a conventional phosphate / soap film formed, '□' indicates FL-E720, '◆' indicates FL-E740, and '▲' indicates FL-E760 on the test piece 60. The case where it coats is shown. As shown therein, the test results show that the above FL-E740 product shows the best performance. In other words, when the FL-E740 lubricant is coated, the spike height is high even at the smallest load.

On the other hand, the drying step (S54) is a process of drying the lubricating film applied to the surface of the material in the coating step (S52) is carried out for 1 to 3 minutes at room temperature. On the other hand, it may be dried using hot air, which is usually performed for about 2 minutes, and the time is determined by the temperature and air volume of the hot air.

5 shows an example of an apparatus for forming a lubricating film for cold forging according to the present invention.

As shown in the figure, the hot water tank 70, the application tank 72 and the drying tank 74 are installed side by side. In the internal space of the hot water tank 70, the hot liquid 76 is stored and stored. In the internal space of the application tank 72 provided on the left side of the hot water tank 70, a lubricant for coating the surface of the material 78 ) Is stored and stored. And a drying means (not shown) for drying the lubricant 78 applied to the surface of the material is built in the drying tank 74 provided on the left side of the coating tank 72.

The lubricant 78 provided in the coating tank 72 is at least any of the trade names FL-E720, FL-E740, or FL-E760 developed by MEC International Co., Ltd. as described above. One.

One side of the hot water tank 70 and the drying tank 74 is provided with a support 80 of a predetermined height. The support 80 is to support the flow means to be described below, it is preferably made of four pillars.

The upper end of the support 80 is connected to each other, the horizontal movement mechanism 82 which is one of the flow means is installed on the upper end of the support. The horizontal moving mechanism 82 is to force the horizontal movement of the material container 100 to be described below, consisting of a horizontal rail 84 and a horizontal motor 86.

The horizontal rails 84 are formed long in left and right, and are configured in pairs before and after by supporting and guiding the left and right fluids 90 to be described below to flow left and right. And the horizontal motor 86 is provided at the front end of the left and right fluid 90 to be described below to force the rotation of the moving wheel 92 to be described below. That is to force and control the horizontal (left and right) movement of the left and right fluid 90 to be described below.

Between the pair of horizontal rails 84, the left and right fluid 90 is installed back and forth. Movement wheels 92 are provided at both ends of the left and right fluids 90 to facilitate movement of the left and right fluids 90. That is, since the movable wheel 92 rotates in conjunction with the horizontal motor 86, when the movable wheel 92 is rolled on the horizontal rail 84, the left and right fluid 90 is moved left and right. .

The lower portion of the left and right fluid 90 is provided with a material receiving container 100. The material container 100 is composed of a box of a predetermined size having a hexagonal column shape, and the inside of the material container 100 is a plurality of materials for forging molding, that is, for forming a lubricating film on the surface (not shown) Not stored).

A plurality of oil through holes 102 are formed in the material container 100. The oil through hole 102 allows the liquid for lubricating oil or hot water to pass through the inside and outside of the material container 100. Therefore, the outer circumferential surface of the material container 100 is preferably formed in a net form by a wire (wire).

Before and after the material receiving container 100, the barrel fixing stand 104 is formed. The barrel fixing stand 104 supports the material holding container 100, and the material holding container 100 is rotatably installed in the tube fixing rack 104.

The lower end of the barrel holding bracket 104 provided in front of the material receiving container 100 is provided with a rotary gear 106 that is integrally rotated with the material receiving container 100, the upper end of the barrel fixing unit 104 is rotated The motor 108 is installed.

The rotary motor 108 is to force the rotation of the material container 100, a rotary belt 108 'is provided between the rotary motor 108 and the rotary gear 106. Accordingly, the rotary gear 106 rotates according to the rotation of the rotary motor 108, and the material container 100 rotates according to the rotation of the rotary gear 106.

Meanwhile, a vertical motor 112 is installed at the front end of the left and right fluid bodies 90, and a vertical belt 114 is installed between the vertical motor 112 and the barrel fixing rod 104. The vertical motor 112 and the vertical belt 114 constitute a vertical movement mechanism 110 to allow the material container 100 to move vertically (up and down).

Therefore, the material container 100 is sequentially accommodated in the application tank 72 and the drying tank 74 by the flow means consisting of the horizontal movement mechanism 82 and the vertical movement mechanism 110 as described above. The material stored in is washed and applied.

The controller 116 is provided at the left end of the horizontal rail 84. The controller 116 is to be a control means for controlling the movement of the material container 100, the front surface is provided with a plurality of operating knobs (116 ') and the like to control the operation of the flow means to be described above. That is to control the operation of the horizontal movement mechanism 82 and the vertical movement mechanism (110).

In addition, the controller 116 controls the rotation motor 108 to force the rotation of the material container 100, in particular, the material wash container 76 in the hot water tank (70) And when it is immersed in the lubricant 78 in the application tank 72, it is controlled to rotate.

FIG. 6 shows a device of an embodiment different from that of FIG. 5 described above. In other words, the configuration of the embodiment is subjected to the hot water and the application step while moving the material by the in-line method.

As shown in FIG. 5, the hot water tank 70 ′ in which the hot liquid 76 ′ is stored and stored in the internal space, and is provided on one side of the hot water tank 70 ′ as in the apparatus of FIG. 5 described above. In the space, a coating tank 72 'for storing the lubricant 78' for applying the surface of the raw material m, and a lubricant applied to one surface of the coating tank 72 'and applied to the surface of the raw material m And a drying tank 74 'provided with drying means (not shown) for drying the 78'.

And the conveyor 120 for the one-way movement of the material (m) is installed, a part of the conveyor 120 is sequentially entered into the hot water tank 70, the application tank 72 and the drying tank 74 in sequence. .

On the upper surface of the conveyor 120, a material seating portion 122 on which the material m is seated is formed. The material seating part 122 is formed at regular intervals so that the material (m) is fixed, and the material washing tank (70) is applied with the hot water tank (70) on the material seating part (122) It is charged in the hot water liquid 76 and the lubricant 78 provided in the tank 72, etc., and wash | cleaning and application | coating are performed.

The lubricant 78 provided in the coating tank 72 is at least one of the trade names FL-E720, FL-E740, or FL-E760 developed by MEC International, Inc., as described above. .

Meanwhile, the conveyor motor 124 is installed at one side of the conveyor 120. The conveyor motor 124 is to be a power generating means for providing power to the conveyor 120, the conveyor motor 124 is controlled by a controller (not shown) provided on one side.

Hereinafter, the operating state of the lubricating film forming apparatus for cold forging according to the present invention having the configuration as described above will be described with reference to FIGS. 5 and 6.

First, the lubricating film forming process in the apparatus shown in FIG. 5 will be described. First, the material container 100 is located at the right end of the horizontal rail 84, wherein the user uses the controller 116. Set each operation time and working distance first. That is, the operating time and the distance of the horizontal moving mechanism 82 and the vertical moving mechanism 110 are set.

Then, when the operation is started, the horizontal moving mechanism 82 is operated to move the left and right fluid 90 to the left, the left and right fluid 90 is moved a certain distance to the left and then the hot water tank 70 Stop at the center of the

Then, the vertical movement mechanism 110 operates. Therefore, by the flow of the vertical belt 114, the material container 100 and the barrel fixing stand 104 is moved downward. When the material container 100 is completely locked in the washing liquid 76 in the washing tank 70, the rotary motor 108 operates. Therefore, the rotary gear 106 is interlocked by the rotation of the rotary belt 108 ′, and thus the material container 100 rotates. In this case, the material accommodated in the material container 100 is rotated and washed by the washing liquid 76 and preheated.

At this time, the hot water liquid 76 is preferably at a temperature of 80 ℃, the material container 100 is maintained for about 1 minute in a state immersed in the hot water liquid 76. And at this time, the material container 100 is continuously rotated.

When washing is completed in the state in which the material container 100 is immersed in the liquid washing liquid 76 inside the water washing tank 70, the vertical motor 112 is operated to allow the barrel fixing stand 104 and the material holding container. Pull up 100.

After the barrel fixing rod 104 and the material container 100 move upward, the horizontal moving mechanism 82 is operated again. That is, as the horizontal motor 86 rotates, the moving wheels 92 of the left and right fluids 90 rotate, and thus the left and right fluids 90 move to the left.

When the left and right fluid 90 reaches the central portion of the application tank 72, the material container 100 is applied to the lower portion as in the hot water tank (70). At this time, the temperature of the lubricant 78 is about 40 ℃ ~ 60 ℃, the material container 100 is preferably maintained for about 1 second in a state locked in the lubricant 78 of the coating tank 72.

When the coating process as described above is completed, the material container 100 is moved into the drying tank 74 by the repetition of the above-described process to perform a drying operation. At this time, the drying operation is performed for about 2 minutes, and hot air drying as described above may be used.

The process of forming a lubricating film on the material is completed by the above process, and after this process is completed, press processing is performed. Since the press working is outside the gist of the present invention, the detailed description is omitted here.

Next, a process of applying in an inline manner will be briefly described with reference to the embodiment of FIG. 6.

Here, as in the above, the user first inputs data such as an operation time and a distance through a controller (not shown). And when the operation of the conveyor 120 is started in accordance with the rotation of the conveyor motor 124, the material (m) starts to move to the right.

At this time, the material (m) is moved in a state seated on the material seating portion 122 of the conveyor 120, while sequentially passing through the hot water tank 70, the application tank 72 and the drying tank 74 Film forming work is performed.

Conditions and holding time in the hot water tank 70, the application tank 72, and the drying tank 74 are the same as in the above-described embodiment described with reference to FIG. That is, the lubricant 78 provided inside the application tank 72 here is also the trade name FL-E720 or FL- developed by MEC International Co., Ltd. as in the apparatus described with reference to FIG. 5. At least either E740 or FL-E760.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

As described above, according to the present invention, the lubricating film forming method for cold forging is made by three processes in which several processes have been shortened than before. And a facility for automatically processing the above three steps is provided to perform the work continuously.

Therefore, the processing time is shortened, and the energy and cost required for the various subsidiary processes are reduced. In addition, wastewater and waste are reduced, which is expected to prevent environmental pollution.

In other words, since the shortened process is performed by a single facility, the overall processing time is shortened, thereby reducing work efficiency and manufacturing cost. And since the work is done automatically, there is an effect that becomes easy to manage.

Claims (8)

A hot water washing step of immersing the material to be used for cold forging in a solution at 80 ° C. for 1 minute to wash and preheat the material; Lubrication at 40-60 ° C. in which at least one of the trade names FL-E720, FL-E740, or FL-E760, which was developed by MEC International Co., Ltd., was dissolved. An application step of immersing in the solution for 1 to 3 seconds to form a lubricating film on the surface of the material; Method for forming a lubricating film for cold forging, characterized in that it comprises a drying step of drying the lubricating film applied to the surface of the material by the coating step for 1 to 3 minutes. A bath washing tank in which the bath washing liquid is stored and stored in an internal space; A coating tank provided at one side of the bath for washing and receiving and storing a lubricant for coating the surface of the material in an inner space; A drying tank provided at one side of the coating tank and provided with a drying means for drying the lubricant applied to the surface of the material; A plurality of materials accommodated therein, and a plurality of through holes formed as a passage of fluid are formed therein, and a material accommodation passage rotatably installed; Flow means for guiding the movement of the material container such that the material container is sequentially accommodated in the hot water tank, the application tank, and the drying tank; The lubricating film forming apparatus for cold forging, which is provided on one side of the flow means and includes a control means for controlling the movement of the material container. A bath washing tank in which the bath washing liquid is stored and stored in an internal space; A coating tank provided at one side of the bath for washing and receiving and storing a lubricant for coating the surface of the material in an inner space; A drying tank provided at one side of the coating tank and provided with a drying means for drying the lubricant applied to the surface of the material; A part of which is sequentially entered into the hot water tank, the application tank, and the drying tank, and the conveyor guides the one-way movement of the material; Lubricating film forming apparatus for cold forging, characterized in that having a configuration including a power generating means for providing power to the conveyor. According to claim 2 or 3, wherein the lubricant provided in the coating tank is at least one of the trade name FL-E720, FL-E740 or FL-E760 developed by MEC International Co., Ltd. Lubricating film forming apparatus for cold forging, characterized in that. The method of claim 2, wherein the flow means, Vertical movement mechanism for guiding the vertical movement of the material container, Lubricating film forming apparatus for cold forging, characterized in that having a configuration comprising a horizontal moving mechanism for guiding the horizontal movement of the material container. The apparatus for forming a lubricating film for cold forging according to claim 2 or 5, wherein a rotation motor for forcing the rotation of the material container is further provided on one side of the material container. The material container according to claim 6, wherein the control means controls the material container to rotate when the material inside the material container is immersed in the hot water in the tank or the lubricant in the coating tank. Lubrication film forming apparatus for cold forging. 4. The apparatus of claim 3, wherein a material seating portion on which one side of the conveyor is seated is formed.