JP2006088170A - Apparatus for forming lubricated film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for forming a lubricated film with which the lubricated film having the uniform thickness on a material to be worked can be formed. <P>SOLUTION: This apparatus is provided with a preheating means 1 for preheating the material W to be worked continuously conveyed with a conveying means 2, a lubricator coating means 3 for coating a solvent dispersion drying type lubricant M by dipping the preheated material W to be worked into a lubricant vessel 36 and a drying means 4 for drying the material W to be worked, coated with the lubricant M. In the above preheating means 1, non-blowing zone B3 exists at the downstream side of a zone for heating the material W to be worked with a warm blowing. Further, it is desirable that the lubricant coating means 3 has a circulating type lubricant coating mechanism 31 for coating the lubricant on the material W to be worked by passing the material W to be worked through the lubricant vessel 36 with an endless conveying belt 30 rotated along the vertical plane. Furthermore, it is desirable that the drying means 40 is provided with a ventilation chamber 41 for blowing gas while ventilating to the material to be worked, coated with lubricant. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a lubricant film on the surface of a workpiece by applying a lubricant for cold plastic working to the surface of a workpiece for cold plastic working such as an automobile part and drying the applied lubricant. The present invention relates to an apparatus for forming a lubricating film.

Conventionally, in this type of lubricating film forming apparatus, the workpiece is heated to a predetermined temperature by the heating means, the lubricant is applied to the surface of the heated workpiece by the lubricant applying means, and the workpiece is processed by the drying means. A technique for drying a lubricant by applying cold air lower than a material heating temperature to a workpiece is known (for example, Patent Document 1).
Japanese Patent No. 3461794 (page 6, FIG. 1)

  By the way, in the prior art, prior to applying the lubricant, the workpiece is heated to a predetermined temperature by the heating means. However, when the hot air is blown onto the workpiece, the portion where the hot air is sufficiently applied is sufficient. Since there is a temperature difference between the portions that do not hit the surface, if a lubricant is applied immediately, there is a problem that it is difficult to form a uniform lubricating film on the workpiece.

  Also, in the lubricant application process, the workpiece may be lifted and lowered to simply immerse it in the lubricant in the lubricant tank and then lifted or applied, or sprayed with a lubricant from a nozzle or the like. It has been broken.

  However, in such a coating method, when the workpiece has a complicated shape, it is easy to form a uniform lubricating film by sufficiently contacting the lubricant to every corner of the workpiece. In addition, uneven coating and liquid sag are likely to occur, and it was difficult to form a uniform lubricating film from this point.

  In addition, the uniform formation of the lubricant film is greatly affected by the drying method after applying the lubricant. If excessive lubricant remains in the workpiece, uneven drying occurs and the lubricant film can be uniformly formed. There wasn't.

  An object of the present invention is to provide a lubricating film forming apparatus capable of forming a lubricating film having a uniform thickness on a workpiece.

  In order to solve the above-mentioned problems, the invention of claim 1 applies a solvent-dispersed dry lubricant for cold plastic working to the surface of a workpiece for cold plastic working, and dries the applied lubricant. A lubricating film forming apparatus for forming a lubricating film on the surface of the workpiece, the preheating means for the workpiece continuously conveyed by the conveying means, and the preheated workpiece is immersed in a lubricant tank for lubrication A lubricant applying means for applying the agent and a drying means for drying the workpiece coated with the lubricant, and the preheating means includes a non-wind region downstream of the region in which the workpiece is heated with warm air. The present invention relates to a lubricant film forming apparatus characterized by the presence of

  In the invention of claim 2, the hot air heating area in the preheating means is divided into a plurality of blocks in the workpiece conveying direction, and each block has hot air having a temperature different from that of the other blocks. The present invention relates to a lubricating film forming apparatus configured to circulate.

  Further, the invention of claim 3 applies a solvent-dispersed dry lubricant for cold plastic working to the surface of the work material for cold plastic working, and dries the applied lubricant to dry the surface of the work material. A lubricating film forming apparatus for forming a lubricating film on the substrate, a preheating means for the workpiece continuously conveyed by the conveying means, and a lubricant applying means for immersing and applying the preheated workpiece in a lubricant liquid Drying means for drying the workpiece coated with the lubricant, the lubricant coating means passing the workpiece through the lubricant tank by an endless transport belt that rotates along a vertical plane. The present invention relates to a lubricant film forming apparatus characterized by having a circulating lubricant application mechanism for applying a lubricant to the workpiece.

  Furthermore, in the invention of claim 4, the lubricant application means receives the workpiece pulled up from the lubricant tank and reverses the workpiece by rotating the workpiece by reversing the workpiece. The present invention relates to a lubricating film forming apparatus provided with a mechanism.

  According to a fifth aspect of the present invention, the surface of the workpiece is coated with a solvent-dispersed dry lubricant for cold plastic working applied to the surface of the workpiece for cold plastic working, and the applied lubricant is dried. A lubricating film forming apparatus for forming a lubricating film on the substrate, a preheating means for the workpiece continuously conveyed by the conveying means, and a lubricant applying means for immersing and applying the preheated workpiece in a lubricant liquid And a drying means for drying the workpiece coated with the lubricant, wherein the drying means is a ventilation chamber for blowing gas while ventilating the workpiece coated with the lubricant, and downstream of the ventilation chamber A drying chamber provided on the side, and between the ventilation chamber and the drying chamber, a partition member for allowing the workpiece to pass and for suppressing the intrusion of the lubricant blown by the gas in the ventilation chamber is provided. It is related to a lubricating film forming apparatus characterized by That.

  Furthermore, the invention of claim 6 relates to a lubricating film forming apparatus configured to dry the lubricant on the surface of the work material by blowing hot air to the work material and exhausting it in the drying chamber. is there.

  According to the lubricating film forming apparatus of the first aspect of the present invention, the work material conveyed by the conveying means is preheated by the preheating means, and the solvent dispersion drying type lubricant is applied to the preheated work material by the lubricant applying means. Then, the lubricant is dried by the drying means, whereby a lubricant film is formed on the surface of the workpiece.

  Since the workpiece heated by the warm air in the preheating means passes through the windless region, the temperature of the entire surface of the workpiece becomes uniform, and a uniform film is formed on the workpiece coated with the lubricant. Is done.

  Further, according to the lubricating film forming apparatus of the second aspect of the present invention, since the warm air having a different temperature is circulated for each preheating block, if the warm air of the most upstream block is set to a temperature higher than the target temperature. In addition, it is possible to prevent the preheating of the portion where the hot air is difficult to hit in the work piece from being left insufficient, and to shorten the entire preheating time. In addition, since warm air is circulated for each block, it is possible to effectively use heat energy and improve efficiency.

  Furthermore, according to the lubricating film forming apparatus of the third aspect of the present invention, the work material is passed through the lubricant tank by the endless conveyor belt that rotates along the vertical plane. When the work material coated with is pulled up by the endless conveyor belt, the lubricant can be drained, which helps to make the film uniform and reduces the carry-out of the lubricant. Since it is immersed in the lubricant tank, only the necessary amount of lubricant is applied to the workpiece as compared with the means for spraying the lubricant, and useless use of the lubricant is eliminated.

  In addition, since the work material is conveyed by an endless conveyance belt that rotates along a vertical plane and passes through the lubricant tank, the work material is given an opportunity to change its posture during conveyance, which is complicated. Even in the shape of the workpiece, the lubricant is spread to every corner, and a uniform film can be formed without uneven coating.

  Moreover, since the endless conveyor belt rotates along the vertical plane, the opening area of the lubricant tank can be reduced, and the evaporation of the solvent in the lubricant can be reduced, thereby suppressing fluctuations in the component ratio in the lubricant. This makes it easy to manage the lubricant.

  Further, since the endless transport belt is used, it is possible to easily cope with a change in the position for receiving the workpiece from the preheating process by changing the upper position of the endless transport belt.

  Furthermore, according to the lubricating film forming apparatus of the invention of claim 4, since the work material is reversed by the work material reversing liquid draining mechanism to perform liquid drainage, excess lubricant adhered to the work material is removed. Removed.

  Further, according to the lubricating film forming apparatus of the invention of claim 5, since a gas such as air is blown to the work material coated with the solvent-dispersed dry lubricant in the ventilation chamber while being ventilated, Any excess lubricant remaining in every corner of the material is reliably wiped out. It is possible to prevent the solvent in the lubricant evaporated by the sprayed gas from staying in the ventilation chamber and reaching the explosion limit.

  In addition, since a partition member is provided between the ventilation chamber and the drying chamber for allowing the workpiece to pass and for suppressing the intrusion of the lubricant blown by the gas in the ventilation chamber, it is blown off in the ventilation chamber. It is possible to prevent the lubricant from entering the drying chamber by the partition member and prevent the lubricant from newly adhering to the surface of the workpiece and preventing the formation of a uniform film.

  Furthermore, according to the lubricating film forming apparatus of the invention of claim 6, since it is a non-circulation method in which hot air is blown to the work material and exhausted, it is possible to prevent the heat source and the like from being contaminated by the scattered lubricating components, The lubrication film of the workpiece can be formed with good finish.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 and 2 are a side sectional view and a plan view, respectively, showing a lubricating film forming apparatus according to an embodiment of the present invention.

  1 and 2, the lubricating film forming apparatus includes a preheating portion 1 for a cold plastic working material W to be cold plastic processed, and a workpiece for passing the workpiece W through the preheating portion 1. The workpiece conveying unit 2, the lubricant applying unit 3, the drying unit 4, and the conveying unit 5 that allows the workpiece W coated with the solvent dispersion drying lubricant M to pass through the drying unit 4.

  The preheating unit 1 includes a preheating furnace 12 surrounded by a heat insulating wall 11 and a plurality of units driven by a motor 14 in order to blow and circulate hot air to the workpiece W passing through the preheating furnace 12. Are arranged.

  The preheating unit 1 is divided into, for example, a block B1, a block B2, and a block B3 from the upstream side in the workpiece conveyance direction. Of these three blocks B1, B2, and B3, the most upstream block B1 is hot air. One of the fans 13 blows a strong wind (for example, 70 ° C. warm air) higher than the target temperature (for example, 50 ° C.) of the workpiece W onto the workpiece W, and blocks B2 downstream thereof. Is set so that a low-temperature weak wind of about the target temperature is blown to the workpiece W by another warm air fan 13.

  The most downstream block B3 is covered with a heat insulating cover 15, and is set as a non-winding region where warm air is not blown in order to make the temperature of the workpiece W uniform.

  Further, at the inlet 12a and the outlet 12b of the preheating furnace 12, partition members 16 and 17 made of silicon sheet for preventing the diffusion of warm air are provided.

  The workpiece conveying unit 2 includes a first-stage conveyor 21 that conveys the workpiece W input in the workpiece input unit S <b> 1 into the preheating furnace 12 in the horizontal direction, and a first-stage conveyor 21. The second stage and third stage conveyors 22 and 23 that receive the workpiece W on the lower side and convey it in a substantially Z shape along the horizontal direction, and the workpiece W on the lower side of the third stage conveyor 23. And a fourth-stage conveyor 24 that receives and conveys it to the lubricant application unit 3 through the non-wind region B3.

  The workpiece W is sequentially dropped from the first-stage conveyor 21 onto the next lower conveyors 22, 23, and 24, and is transferred each time the workpiece W moves to the next stage. This is because the hot air is blown evenly over the entire workpiece W by giving the opportunity.

  The first-stage to fourth-stage conveyors 21 to 24 may be net-type belt conveyors or the like. Here, however, a caterpillar-type conveyor that does not deform even if the workpiece W is heavy. A conveyor is used. In the case of this caterpillar type conveyor, since the hot air from the back side of the conveyor may not hit the workpiece W, the workpiece receiving surface 20a which is the upper surface of the conveyors 21 to 24 is as shown in FIG. For example, it is formed in a corrugated or serrated shape.

  In the first to fourth stage conveyors 21 to 24, caterpillar rails (not shown) corresponding to the part of the workpiece input part S1 and the part that receives the workpiece W falling from the preceding conveyor. If a damper (not shown) is provided on the top, it is possible to absorb an impact caused by dropping when the workpiece W is heavy.

  The lubricant application unit 3 includes a circulating lubricant application mechanism 31 and a workpiece reversing liquid draining mechanism 32.

  As shown in FIG. 4, the circulating lubricant application mechanism 31 drives the endless transport belt 30, a pair of driving and driven wheels 33, 34 on which the endless transport belt 30 is suspended, and the driving wheel 33. The motor 33 </ b> A, the lubricant tank 36 in which the workpiece W is immersed, and a workpiece drop-off prevention member 37 disposed along the outer periphery of the endless conveyance belt 30.

  The endless conveyor belt 30 is intermittently provided with a plurality of buckets for transferring the workpiece W or a scraper 30a as in this example, and receives the workpiece W having passed through the windless region B3 to receive the lubricant. After being immersed in the lubricant M in the tank 36, it can be lifted. The lubricant tank 36 is provided with a drain valve 36a for collecting the lubricant M.

  The workpiece reversing liquid draining mechanism 32 is, for example, a lubricant receiving portion 38 and is rotatably supported by the lubricant receiving portion 38 and rotates in synchronization with the endless conveying belt 30 to apply the lubricant M. The drainage wheel 39 that reverses the processed workpiece W and drains the fluid, and the motor 39A that rotationally drives the drainage wheel 39, and drains the workpiece W pulled up from the lubricant tank 36. The lubricant M received by the vehicle 39 and applied to the workpiece W during rotation is drained and then delivered to the drying unit 4. Note that a drain valve 38 a for collecting the drained lubricant M is also provided in the lubricant receiving portion 38.

  The liquid lubricant M accommodated in the lubricant tank 36 may be solidified in a cream form at room temperature and liquefy as the temperature rises depending on the type. For such a lubricant, in order to maintain a liquid state, a heating facility may be provided inside or around the lubricant tank 36 to heat the lubricant M. In addition, in the case where the liquid component of the lubricant M is easily separated, for example, a stirrer in which foaming property due to a surfactant used for dispersing the component is suppressed may be installed in the lubricant tank 36.

  The drying unit 4 is surrounded by a heat insulating wall 40 and includes a ventilation chamber 41 and a drying chamber 42 constituted by a heating furnace on the downstream side of the ventilation chamber 41.

  The ventilating chamber 41 is provided with a blower 43 for blowing air to remove excess lubricant M remaining in every corner of the workpiece W transferred from the workpiece reversing liquid draining mechanism 32. ing.

  The drying chamber 42 employs a drying method (one-pass method) in which hot air from a heat source (not shown) is blown to the workpiece W from one direction and exhausted.

  In addition, partition members 44 and 45 made of silicon sheet for preventing hot air diffusion are also provided at the inlet 41a of the ventilation chamber 41 and the outlet 42a of the drying chamber 42, respectively.

  Further, a partition member 46 made of a silicon sheet or the like is provided at a boundary portion between the ventilation chamber 41 and the drying chamber 42 in a manner that does not prevent the workpiece W from passing, and the lubricant blown off in the ventilation chamber 41 is provided. Intrusion into the drying chamber 42 can be suppressed.

  The transport unit 5 receives the workpiece W that has passed through the liquid draining mechanism 32 of the lubricant, passes the material W through the ventilation chamber 41 and the drying chamber 42, and transports them to the discharge unit S2. It comprises a caterpillar type conveyor 53 suspended between the driven sprocket 52 and a motor 54 for driving the drive sprocket 51.

  An oil pan 6 is provided below the drying unit 4.

  Next, the operation of the lubricating film forming apparatus having the above configuration will be described.

  The first-stage to third-stage conveyors 21, 22, and 23 are driven in the workpiece conveyance unit 2, and the workpiece W input from the carry-in unit S 1 is preheated in the preheating unit 1 by the first-stage conveyor 21. When the workpiece W is carried into the chamber 12, the workpiece W is preheated with hot air having a high temperature in the upstream block B1, for example, hot air having a temperature (70 ° C.) higher than the target temperature (50 ° C.). .

  Since the workpiece W conveyed by the first-stage conveyor 21 is processed at a stretch with high-temperature hot air, it can contribute to shortening the entire processing time.

  The workpiece W is transferred from the first-stage conveyor 21 to the second-stage conveyor 22, and then the workpiece W conveyed by the second-stage conveyor 22 corresponds to the downstream block B2. Is transferred to the third-stage conveyor 23, and further transferred from the third-stage conveyor 23 to the fourth-stage conveyor 24.

  In the block B2, the workpiece W is exposed to weak warm air near the target temperature (50 ° C.).

  Here, if the warm air of the most upstream block B1 is set to a temperature higher than the target temperature, it is avoided that the preheating of the portion where the warm air of the workpiece W is difficult to hit becomes insufficient. In addition, the overall pre-heat treatment time can be shortened. Moreover, since the warm air in the blocks B1 and B2 circulates for each block, heat loss can be reduced and energy efficiency can be improved.

  In this way, the workpiece W preheated in the blocks B1 and B2 in the remaining heat section 1 is transported by the fourth-stage conveyor 24 and passes through the non-wind region which is the most downstream block B3.

  By passing through the windless region B3, the temperature of the entire surface of the workpiece W is made substantially uniform, which is advantageous for uniform formation of a lubricating film in the next lubricant application step.

  Next, the workpiece W that has passed through the windless region B3 is fed to the circulating lubricant coating mechanism 31 in the lubricant coating unit 3 by the fourth-stage conveyor 24, and is transferred to the endless transport belt 30.

  As the endless transport belt 30 rotates along the vertical plane, the workpiece W is once dipped in the lubricant M in the lubricant tank 36 and then lifted. Will be applied.

  Here, since the workpiece W is passed through the lubricant M by the rotation operation by the endless transport belt 30, useless use of the lubricant M is eliminated as compared with the spray coating operation. Further, since the posture of the workpiece W is changed during conveyance, the lubricant is sufficiently in contact with every corner of the workpiece W.

  Furthermore, since the workpiece W is immersed in the lubricant M in a preheated state, when the lubricant W is oily, the lubricant W rises to the same level as the temperature of the workpiece W, and the viscosity is increased. As a result, the lubricant M can be applied in a necessary minimum amount, and the lubricant M can be saved.

  Further, since the work material W is dipped in the lubricant M by the endless conveying belt 30 and then lifted, the excess lubricant M adhering to the work material W can be drained during the lifting, and the lubricant film It helps to homogenize and also reduces the amount of lubricant M taken out.

  By the way, as the circulating lubricant application mechanism 31, instead of using the endless conveyor belt 30, for example, a water wheel type may be used. In this case, the work material is received from the conveyor 24 in the preheating process. Setting and changing the position etc. becomes complicated. On the other hand, in the configuration using the endless conveying belt 30, the position of the driven wheel 34, which is the upper part, can be changed while partly immersed in the lubricant tank 36, whereby the workpiece W is received. You can easily set and change the location.

  Next, when the workpiece W to which the lubricant M is applied is pulled up by the endless transport belt 30, the workpiece W is transferred to the liquid drain wheel 39 in the workpiece reverse liquid draining mechanism 32 and rotated. Since the workpiece W is given an opportunity of reversal during the rotation of the liquid drain wheel 39, the excess lubricant M adhering to the workpiece W is wiped off. That is, even if the shape of the workpiece W is complicated, it is sufficiently drained.

  The workpiece W that has been drained by the drainer wheel 39 is further transferred to the conveyor 53 and sent to the ventilation chamber 41. Here, the lubricant M collected in every corner of the workpiece W is ventilated. Wiped out. Thereby, the film | membrane of the lubricant M adhering to the surface of the workpiece W becomes uniform.

  The workpiece reversing liquid draining mechanism 32 is not limited to the one using the liquid draining wheel 39, and for example, a spiral conveyor can be employed.

  Furthermore, the workpiece W is fed from the ventilation chamber 41 to the drying chamber 42 and blown with a powerful blower. For this reason, the lubricant M remaining on the workpiece W in the coating process is completely drained and contributes to the formation of a uniform film. Further, when the lubricant M is oily, the volatile component is diluted and exhausted in one direction to be dried in a safe atmosphere that is thinner than the explosion limit. Can be taken out and sent to the next process in a further cooled state.

  Moreover, since the entry of the lubricant blown off in the ventilation chamber 41 into the drying chamber 42 is suppressed by the partition member 46, the lubricant that has entered the drying chamber 42 adheres to the surface of the workpiece W and is uniform. Preventing the formation of the lubricating film is prevented.

  By the way, if the circulation system is used for heating in the drying process, the scattered lubricating components in the lubricant M may cause contamination of the heat exchange portion of the heat source and a decrease in performance, and it is necessary to frequently perform cleaning work. is there.

  On the other hand, in the drying process of this example, the lubricant on the surface of the work material is dried by an exhaust method in which warm air is blown from one direction and exhausted, so that dirt such as a heat source is reduced and proper. A drying process is achieved.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, the preheating unit 1 has a windless region downstream of a region where the workpiece is heated with warm air, and the lubricant application unit 2 is processed by the endless conveyance belt 30 that rotates along a vertical plane. A circulating lubricant application mechanism 31 is provided for passing the material through the lubricant tank 36 and applying the lubricant to the workpiece. The drying unit 4 ventilates the workpiece to which the lubricant is applied. However, it has been described that the ventilation chamber 41 for blowing gas is provided, but this does not have to satisfy all the requirements, and the non-wind region of the remaining heat part 1 and the circulation lubricant application of the lubricant application part 3 Any structure of the mechanism 31 and the ventilation chamber 41 of the drying unit 4 may be provided, or any two of these three may be provided. However, it is desirable that all three are provided because a more uniform lubricating film can be formed.

It is side surface sectional drawing which shows the lubricating film forming apparatus which concerns on one Embodiment of this invention. It is a top view which similarly shows a lubricating film forming apparatus. It is a schematic side view which shows the workpiece conveyance surface shape of a caterpillar type conveyor. It is an expanded sectional view showing a lubricant application part.

Explanation of symbols

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Preheating part (remaining heat means)
2 ............ Workpiece material conveyance section (conveyance means)
3 .... Lubricant application part (lubricant application means)
4 .... Drying section (drying means)
30 ············ Endless conveyor belt 31 ···································································· Cutting mechanism 36 ... Lubricant tank 41 ... Ventilation room 42 ... Drying room 46 ... ······ Partition members B1 to B3 (no wind region) ··· Block M ······· Lubricant W ················

Claims (6)

Lubricant film that forms a lubricant film on the surface of the workpiece by applying a solvent-dispersed dry lubricant for cold plastic processing to the surface of the workpiece for cold plastic processing and drying the applied lubricant A forming device,
Preheating means for the workpiece continuously conveyed by the conveying means;
A lubricant application means for immersing the preheated workpiece in a lubricant tank and applying the lubricant;
A drying means for drying the workpiece coated with the lubricant;
With
The preheating means has a non-wind region on the downstream side of a region where the workpiece is heated with warm air. The warm air heating area in the preheating means is divided into a plurality of blocks in the workpiece conveyance direction, and each block is configured such that warm air having a temperature different from that of other blocks circulates. Item 2. The lubricating film forming apparatus according to Item 1. Lubricant film formation in which a solvent-dispersed dry lubricant for cold plastic working is applied to the surface of a workpiece for cold plastic working, and the applied lubricant is dried to form a lubricating film on the surface of the workpiece. A device,
Preheating means for the workpiece continuously conveyed by the conveying means;
Lubricant application means for immersing and applying the preheated workpiece in a lubricant liquid;
A drying means for drying the workpiece coated with the lubricant;
With
The lubricant application means has a circulating lubricant application mechanism that applies a lubricant to the work material by passing the work material through the lubricant tank by an endless conveyor belt that rotates along a vertical plane. An apparatus for forming a lubricating film. 4. The workpiece reversing liquid draining mechanism is provided in the lubricant application means, wherein the workpiece reversing liquid draining mechanism that receives the workpiece pulled up from the lubricant tank and reverses the workpiece by rotation to perform liquid draining is provided. The lubricating film forming apparatus as described. Lubricant film formation in which a solvent-dispersed dry lubricant for cold plastic working is applied to the surface of a workpiece for cold plastic working, and the applied lubricant is dried to form a lubricating film on the surface of the workpiece. A device,
Preheating means for the workpiece continuously conveyed by the conveying means;
Lubricant application means for immersing and applying the preheated workpiece in a lubricant liquid;
A drying means for drying the workpiece coated with the lubricant;
With
The drying means includes a ventilation chamber that blows gas while ventilating a workpiece coated with a lubricant, and a drying chamber provided on the downstream side of the ventilation chamber, between the ventilation chamber and the drying chamber. And a partition member for preventing penetration of the lubricant blown by the gas in the ventilation chamber and allowing the workpiece to pass therethrough. The lubricating film forming apparatus according to claim 5, wherein the drying chamber is configured to blow warm air on the work material and exhaust the air to dry the lubricant on the work material surface.

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