JP2008000766A - Device for and method of lubricating forging die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forging-die lubricating device which can reduce the consumption of a lubricating liquid and can easily, almost uniformly form a lubricating film on the surface of a forging die by cooling the die to the optimal temperature for forming the film, and to provide the lubricating method therefor. <P>SOLUTION: The lubricating device 1 is provided with: an air supply tube 3 communicating with an air compressor 2; a cooling water supply tube 5 communicating with a cooling water-pressurizing tank 4; a lubricating-liquid supplying tube 7 communicating with a lubricating-liquid pressurizing tank 6; the valve elements 8 and 9 which are interposed in the above respective supply tubes 5 and 7 and are opened or closed according to an input signal; a mixing part 15 communicating with the respective supply tubes 3, 5 and 7; and a spray nozzle 17 which communicates with the mixing part 15 and is arranged toward the forging die. Thereby, the amount used of the lubricating liquid is reduced, and almost uniform lubricating film can be formed on the surface of the forging die by cooling it to the optimal temperature for forming such a film. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lubricating device and a lubricating method for a forging die used for hot or warm forging.

  Conventionally, in hot and warm forging processes, a water-soluble lubricating liquid has been used as a lubrication for the forging die in order to reduce friction, prevent seizure, and cool the forging die. In addition, the optimum conditions for lubrication of the forging die differ depending on the processing temperature (hot or warm) and the shape of the molded product. It was necessary to manage the conditions to improve the quality of the molded product, improve the life of the forging die and reduce the amount of lubricant used.

A conventional forging die lubrication apparatus 50 will be described with reference to FIG.
In a conventional forging die lubricating device 50, a lubricating liquid spraying device 51 and an air blowing device 52 are configured separately.
The lubricant spraying device 51 communicates with the air supply pipe 3 that communicates with the air compressor 2, the lubricant supply pipe 7 that communicates with the lubricant pressurization tank 6, and the air supply pipe 3 and the lubricant supply pipe 7. From the mixing unit 15, a lubricating liquid pipe 32 communicating with the mixing unit 15, and a lubricating liquid injection nozzle 30 connected to the downstream end of the lubricating liquid pipe 32 and arranged toward the forging die (not shown). It is configured. A flow meter 11 is interposed in the lubricating liquid supply pipe 7.
On the other hand, the air blow device 52 is configured by connecting the air injection nozzle 31 disposed toward the forging die to the downstream end of the air pipe 33 communicating with the air compressor 2. Note that the air injection nozzle 31 and the lubricant injection nozzle 30 are both arranged toward the forging die, but are arranged at different positions.

A method for lubricating a forging die using the conventional lubrication apparatus 50 will be described.
First, a mixed fluid of air / lubricating liquid, that is, a lubricating liquid is sprayed from a lubricating liquid spray nozzle 30 of the lubricating liquid spraying device 51 onto a forging die, and a lubricating film is formed on the surface of the forging die. Cool to optimum temperature.
Thereafter, air is blown from the air injection nozzle 31 of the air blowing device 52 to the forging die, and is unnecessary for forming a lubricating coating on the surface of the forging die out of the lubricating liquid sprayed when the forging die is cooled. The lubricating film is blown off so that the lubricating coating is formed substantially uniformly on the surface of the forging die.

However, in the case of the above-described conventional lubrication method, particularly in hot forging lubrication, a large amount of lubricating liquid is used to cool the forging die to an optimum temperature in order to place an emphasis on cooling the forging die. Sprayed. For this reason, an unnecessary lubricating liquid is also sprayed when forming the lubricating coating on the forging die, and an unnecessary lubricating liquid recovery device is required. Furthermore, since the amount of the lubricating liquid used increases, the frequency of replacement with a new lubricating liquid increases.
Moreover, in the conventional lubricating device 50, in order to form a substantially uniform lubricating film on the surface of the forging die, the lubricating liquid unnecessary for forming the lubricating film is blown off by the air blowing device 52. Since the amount is large, the lubricating liquid tends to remain in a liquid state, and it becomes difficult to form the lubricating coating substantially uniformly.
Furthermore, in the conventional lubrication apparatus 50, since the distance between the flowmeter 11 and the lubricating liquid injection nozzle 30 is large and the lubricating liquid is always being pumped from the lubricating liquid pressurizing tank 6, the lubricating liquid When the injection nozzle 30 is opened and the lubricating liquid is sprayed, the amount of lubricating liquid measured by the flow meter 11 is sprayed due to the influence of pressure loss such as expansion of the lubricating liquid pipe 32 or compression of the lubricating liquid, and the flow rate is increased. It has become difficult to control the exact spray amount of the lubricating liquid by the total 11.

  Furthermore, in the conventional lubricating device 50, since the lubricating liquid injection nozzle 30 and the air injection nozzle 31 are separately provided separately, a large number of lubricating liquid injections are made around the forging die depending on the shape of the molded product. In some cases, the nozzle 30 and the air injection nozzle 31 are arranged, and the number of pipes around the forging die is increased and complicated. Further, only one of the lubricating liquid injection nozzle 30 and the air injection nozzle 31 can be disposed at an optimum position (angle) around the forging die, and both the lubricating liquid and air are optimum around the forging die. It was difficult to inject from the position.

Therefore, as a conventional forging die lubrication device, Patent Document 1 discloses a lubrication fluid nozzle and an air nozzle, a lubrication fluid supply device for supplying a lubrication fluid to the lubrication fluid nozzle, and supplying air to the lubrication fluid nozzle and the air nozzle. For example, in a hot forging press by a lubricating liquid spraying device comprising a control device for controlling the spraying timing and spraying time of the lubricating liquid sprayed by the lubricating liquid nozzle and the spraying of air by the air nozzle and the spraying time. Lubricating liquid is sprayed on the mold from the lubricating liquid nozzle, and then air is sprayed from the air nozzle, so that the lubricating liquid is evenly applied to the entire surface of the mold and the water in the lubricating liquid evaporates in a short time to lubricate the mold. It is disclosed that a dry film of liquid is formed.
JP-A-7-171649

  However, the lubricating fluid spraying device according to the invention of Patent Document 1 is a large amount in the case where an emphasis is placed on cooling of a forging die as in hot forging as in the conventional lubricating device 50 shown in FIG. It is necessary to use a lubricating liquid. In the lubricating liquid spraying apparatus according to the invention of Patent Document 1, the above-described problems, that is, problems related to an increase in the amount of lubricating liquid used, lubrication to the surface of the forging die Solving the problems related to the treatment of the lubricating liquid unnecessary for the formation of the coating, and the problem that the formation of the substantially uniform lubricating coating on the forging die is hindered by the unnecessary lubricating liquid Can not.

  The present invention has been made in view of the above points, and while reducing the amount of lubricating liquid used, cooling the forging die to an optimum temperature for forming a lubricating coating, An object of the present invention is to provide a forging die lubricating device and a lubricating method capable of easily forming a substantially uniform lubricating film.

According to the present invention, as a first means for solving the above-mentioned problem, the lubricating device for a forging die according to claim 1 is in communication with an air supply pipe communicating with an air supply source and a cooling water supply source. Each cooling water supply pipe, a lubricating liquid supply pipe that communicates with a lubricating liquid supply source, and each valve element that is provided in each of the cooling water supply pipe and the lubricating liquid supply pipe and that opens and closes based on an input signal And a mixing part that communicates with each of the air supply pipe, the cooling water supply pipe, and the lubricating liquid supply pipe, and an injection nozzle that communicates with the mixing part and is disposed toward the forging die. It is characterized by being.
A forging die lubricating device according to a second aspect of the present invention is the invention according to the first aspect, wherein the cooling water supply pipe and the lubricating liquid supply pipe are adjacent to each other upstream of the valve bodies. Each is provided with a flow meter.
A forging die lubrication device according to a third aspect of the present invention is the invention according to the second aspect, wherein each valve body is connected to a control device that outputs an opening / closing operation signal to each valve body. The control device is connected to each flow meter, and outputs a closing operation signal to each valve body when a predetermined flow rate is measured by each flow meter.

Further, as a second means for solving the above-mentioned problem, the invention of the forging die lubrication method according to claim 4 is a forging die lubrication method, which is disposed toward the forging die. Spray the mixed fluid of air and cooling water from the spray nozzle to cool the forging die to the optimum temperature for forming the lubricating coating, and then spray the same spray nozzle as the spray nozzle sprayed with the coolant Then, a mixed fluid of air and lubricating liquid is sprayed to form a lubricating coating on the forging die.
The invention for lubricating a forging die according to claim 5 is the invention according to claim 4, wherein the step of cooling the forging die after the step of removing the cooling water or the lubricating liquid in the forging die In the step of making the lubricating coating substantially uniform on the surface of the forging die after the step of spraying the forging die and promoting the drying, only forging air from the same injection nozzle as the spray nozzle sprayed with cooling water and lubricating liquid It is characterized by spraying on a mold.

Therefore, in the invention of the forging die lubrication device according to the first aspect, first, the valve body interposed in the cooling water supply pipe in a state where air is pumped from the air supply source to the mixing section through the air supply pipe. Only the opening operation is performed, and the cooling water is pumped from the cooling water supply source to the mixing unit through the cooling water supply pipe. Then, air and cooling water are mixed in the mixing section, and the mixed fluid of air and cooling water, that is, cooling water is sprayed from the injection nozzle to the forging die, and the forging die forms a lubricating film. Then, the valve body of the cooling water supply pipe is closed.
Thereafter, only the valve element interposed in the lubricating liquid supply pipe is opened while the air is being pumped, and the lubricating liquid is pumped from the lubricating liquid supply source to the mixing section through the lubricating liquid supply pipe. Then, air and lubricating liquid are mixed in the mixing section, and the mixed fluid of air and lubricating liquid, that is, the lubricating liquid is sprayed on the forging die from the same spray nozzle as the spray nozzle sprayed with cooling water, A lubricating coating is formed substantially uniformly on the surface of the forging die, and the valve body of the lubricating liquid supply pipe is closed. Finally, the supply of air from the air supply source is stopped, and lubrication of the forging die is completed.
Also, when the cooling water is removed after cooling the forging die or when the lubricating coating is sprayed on the surface of the forging die after the lubricating liquid is sprayed, and the drying of the forging die is facilitated. It is also possible to blow only the air onto the forging die from the same injection nozzle as the spray nozzle sprayed with the cooling water and the lubricating liquid, with each valve body of the water supply pipe being closed.
In the invention of the lubrication device for a forging die according to claim 2, since the flow meters are respectively arranged close to the upstream side of each valve body, the expansion of the pipe extending from each valve body to the downstream side and the lubricating liquid The amount of cooling water or lubricating liquid sprayed from the injection nozzle is accurately measured by a flow meter without being affected by pressure loss due to compression of the nozzle.
In the invention of the forging die lubrication device according to claim 3, the control device includes a predetermined cooling water amount and a forging die for cooling the forging die to an optimum temperature for forming a lubricating film on the surface thereof. When a predetermined amount of lubricating liquid for forming a lubricating film on the surface of the liquid is input in advance and the predetermined amount of cooling water or the predetermined amount of lubricating liquid is measured by the flowmeter while spraying the cooling water or the lubricating liquid. Based on the signal from the control device, the valve body of the cooling water supply pipe or the valve body of the lubricating liquid supply pipe is closed, and the spraying of the cooling water or lubricating liquid is completed.

In the invention of the forging die lubrication method described in claim 4, first, the mixed fluid of air and cooling water, that is, the cooling water is sprayed from the spray nozzle to the forging die, and the forging die has a lubricating coating. Cooled to the optimal temperature for forming. Thereafter, a mixed fluid of air and lubricating liquid, that is, lubricating liquid is sprayed on the forging die from the same injection nozzle as the spray nozzle sprayed with cooling water, and a lubricating film is formed substantially uniformly on the surface of the forging die. Is done. As a result, the amount of the lubricating liquid used is considerably reduced compared to the conventional form in which the lubricating liquid is used for cooling the forging die, which is unnecessary for forming a lubricating coating on the surface of the forging die. The lubricating liquid is not sprayed onto the forging die, and the formation of a substantially uniform lubricating film on the surface of the forging die is not hindered by unnecessary lubricating liquid. Moreover, the spray nozzle for spraying the cooling water and the lubricating liquid is the same, and the spray nozzle is disposed at an optimum position for spraying the cooling water and the lubricating liquid onto the forging die. The formation of a lubricating coating on the surface of the forging die by the cooling of the die and the lubricating liquid is easily achieved.
In the invention of the forging die lubrication method according to the fifth aspect, the step of cooling the forging die and then removing the cooling water or spraying the lubricating liquid to the forging die and then applying the lubricating coating to the surface of the forging die In the process of uniforming and promoting the drying, only air is sprayed from the same spray nozzle as the spray nozzle spraying the lubricant and cooling water onto the forging mold, so that a lubricating coating is formed on the surface of the forging mold by the lubricant. Is easily achieved.

  According to the present invention, the amount of lubricating liquid used is reduced and the forging die is cooled to the optimum temperature for forming the lubricating coating, so that a substantially uniform lubricating coating is easily formed on the surface of the forging die. It is possible to provide a lubricating device and a lubricating method for a forging die that can be performed.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS. In addition, the same member and a corresponding member as a prior art example are demonstrated using the same code | symbol.
First, a lubricating device 1 according to a first embodiment of the present invention will be described with reference to FIG.
The lubricating device 1 according to the first embodiment of the present invention includes an air supply pipe 3 that communicates with an air compressor (air supply source) 2 and a cooling water that communicates with a cooling water pressurization tank (cooling water supply source) 4. A supply pipe 5, a lubricating liquid supply pipe 7 communicating with a lubricating liquid pressurizing tank (lubricating liquid supply source) 6, a cooling water supply pipe 5 and a lubricating liquid supply pipe 7 are provided, respectively, based on an input signal. Each of the valve bodies 8 and 9 that are opened and closed, a mixing section 15 that communicates with each of the air supply pipe 3, the cooling water supply pipe 5, and the lubricating liquid supply pipe 7, and the mixing section 15 that communicates with each other. An injection nozzle 17 arranged toward a mold (not shown) is schematically configured.

  The lubrication apparatus 1 will be described in more detail. The upstream side of the mixing unit 15 is connected to the downstream ends of the air supply pipe 3, the cooling water supply pipe 5, and the lubricating liquid supply pipe 7. Is connected to the upstream end of the pipe 16. The pipe 16 is longer than the air supply pipe 3, the cooling water supply pipe 5, and the lubricating liquid supply pipe 7 and has a length of about 20 m. An injection nozzle 17 is connected to the downstream end of the pipe 16. The injection nozzle 17 is disposed around the forging die at an optimum position for spraying the cooling water and the lubricating liquid onto the forging die.

In addition, each valve body 8, 9 interposed in each of the cooling water supply pipe 5 and the lubricating liquid supply pipe 7 is configured by an electromagnetic valve or the like, and each valve body 8, 9 includes each valve body 8. , 9 is electrically connected to a control device 18 for controlling the opening / closing operation. The cooling water supply pipe 5 and the lubricating liquid supply pipe 7 are provided with flow meters 10 and 11 at positions close to the upstream side of the valve bodies 8 and 9, respectively. Is electrically connected.
The control device 18 includes a predetermined cooling water amount for cooling the forging die to an optimum temperature for forming a lubricating coating on the surface thereof, and a predetermined amount for forming the lubricating coating on the surface of the forging die. When a predetermined amount of cooling water or a predetermined amount of lubricating liquid is measured by the flow meters 10 and 11 during lubrication, the controller 18 closes the valve body 8 or 9. Is output.

And the method of lubricating a forge metal mold | die with the lubrication apparatus 1 which concerns on embodiment of this invention is demonstrated.
When one forging process is completed and lubrication of the forging die is started, first, as a state in which air is pumped from the air compressor 2 into the pipe 16 via the air supply pipe 3 and the mixing unit 15, Only the valve body 8 of the cooling water supply pipe 5 is opened by the control device 18, and the cooling water is pumped from the cooling water pressurizing tank 4 to the mixing unit 15 through the cooling water supply pipe 5. Then, air and cooling water are mixed in the mixing unit 15, and the mixed fluid 2 of air and cooling water flows through the pipe 16, and the cooling water is sprayed from the injection nozzle 17 onto the forging die. While the cooling water is being sprayed, a predetermined amount of cooling water for cooling the forging die to an optimum temperature for forming the lubricating coating, which has been input to the control device 18 in advance, is measured by the flow meter 10. Then, a closing operation signal is output from the control device 18 to the valve body 8, the valve body 8 is closed and spraying of the cooling water ends.
Subsequently, with the valve bodies 8 and 9 of the cooling water supply pipe 5 and the lubricating liquid supply pipe 7 kept closed, only air is blown from the injection nozzle 17 to the forging die and sprayed onto the surface of the forging die. To remove the generated cooling water.

Next, while the air is being pumped from the air compressor 2, only the valve body 9 of the lubricating liquid supply pipe 7 is opened by the control device 18, and the lubricating liquid is supplied from the lubricating liquid pressurizing tank 6 to the lubricating liquid supply pipe. 7 and pumped to the mixing section 15. Then, air and the lubricating liquid are mixed in the mixing unit 15, and the mixed fluid of air and lubricating liquid flows in the pipe 16, and the lubricating liquid is sprayed from the injection nozzle 17 onto the forging die. When the predetermined amount of lubricating liquid for forming a lubricating coating on the surface of the forging die, which has been input to the controller 18 in advance while the lubricant is sprayed, is measured by the flow meter 11, the controller A closing operation signal is output from the valve body 9 to the valve body 9, and the valve body 9 is closed to finish the spraying of the lubricating liquid.
Finally, the supply of air from the air compressor 2 is stopped, lubrication of the forging die is finished, and the next forging process is started.

As described above, in the lubricating device 1 according to the first embodiment, the air is constantly being pumped from the air compressor 2 from the start to the end of lubrication, 9 is opened and closed, cooling water and lubricating liquid are sprayed in order from the injection nozzle 17, and the forging die is lubricated. Accordingly, since the cooling water or the lubricating liquid is not sprayed from the spray nozzle 17 alone, it is possible to prevent a portion of the forging mold from being concentrated and cooled during cooling, and the forging mold It is possible to prevent the lubricant film from being biased to one part.
In the lubrication method by the lubrication apparatus 1 according to the first embodiment, after the predetermined amount of lubricating liquid is sprayed on the forging die, each valve of the cooling water supply pipe 5 and the lubricating liquid supply pipe 7 for a predetermined time. While the bodies 8 and 9 are kept closed, only air may be blown from the injection nozzle 17 to the forging die to make the lubricating coating substantially uniform on the surface of the forging die and promote drying thereof.

Next, a lubricating device 1a according to a second embodiment of the present invention will be described with reference to FIG.
In describing the lubricating device 1a according to the second embodiment of the present invention, differences from the lubricating device 1 according to the first embodiment will be mainly described.
In the lubricating device 1 a according to the second embodiment of the present invention, the air supply pipe 3, the cooling water supply pipe 5 and the lubricating liquid supply pipe 7 are assembled on the downstream side of the valve bodies 8 and 9, and are integrated downstream. A three-tube assembly 20 extending to the side is provided. The upstream side of the mixing unit 15 is connected to the downstream end of the three-pipe assembly 20, and the injection nozzle 17 is connected in the vicinity of the downstream side of the mixing unit 15.

Next, a lubricating device 1b according to a third embodiment of the present invention will be described with reference to FIG.
In describing the lubricating device 1b according to the third embodiment of the present invention, differences from the lubricating device 1 according to the first embodiment will be mainly described.
In the lubricating device 1b according to the third embodiment of the present invention, the liquid flow pipe 21 in which the cooling water supply pipe 5 and the lubricating liquid supply pipe 7 are joined at the downstream positions of the valve bodies 8 and 9 is provided. Provided. Then, a two-tube assembly 22 is provided, which collects the air supply pipe 3 and the liquid flow pipe 21 and extends integrally downstream. The upstream side of the mixing unit 15 is connected to the downstream end of the two-tube assembly 22, and the injection nozzle 17 is connected in the vicinity of the downstream side of the mixing unit 15.

The method for lubricating the forging die by the lubricating devices 1a and 1b according to the second and third embodiments is the same as that of the lubricating device 1 according to the first embodiment, so that the description thereof is omitted here. To do.
However, in the lubrication apparatuses 1a and 1b according to the second and third embodiments, the mixing unit 15 is provided in the vicinity of the upstream side of the injection nozzle 17, and air and cooling immediately before being injected from the injection nozzle 17. Since water or the lubricating liquid is mixed, the cooling water or the lubricating liquid is sprayed in a fine mist form from the injection nozzle 17 rather than the lubricating device 1 according to the first embodiment.

  As described above, the lubricating devices 1, 1 a, 1 b according to the first to third embodiments of the present invention communicate with the air supply pipe 3 communicating with the air compressor 2 and the cooling water pressurizing tank 4. A cooling water supply pipe 5; a lubricating liquid supply pipe 7 communicating with the lubricating liquid pressurizing tank 6; valve bodies 8 and 9 interposed in the cooling water supply pipe 5 and the lubricating liquid supply pipe 7; The flowmeters 10 and 11, the air supply pipe 3, the cooling water supply pipe 5, and the lubricating liquid disposed in the water supply pipe 5 and the lubricating liquid supply pipe 7 in the vicinity of the upstream side of the valve bodies 8 and 9, respectively. A mixing portion 15 that communicates with each of the supply pipes 7 and an injection that communicates with the mixing portion 15 and is disposed at an optimum position around the forging die for spraying the cooling water and the lubricating liquid onto the forging die. A signal for opening / closing the valve bodies 8 and 9 is output to the nozzle 17 and the valve bodies 8 and 9, and each flow meter 10 is operated. When a predetermined flow rate is measured by 11, and a control unit 18 for outputting a signal of closing the valve bodies 8,9.

Thus, when the forging die is cooled to a predetermined temperature, air is pumped from the air compressor 2 and the control device 18 opens the valve body 8 of the cooling water supply pipe 5 to inject cooling water. Since the forging die can be sprayed from the nozzle 17 to the forging die and cooled to an optimum temperature for forming the lubricating film, a lubricating liquid has been conventionally used for cooling the forging die. Compared to the form, the amount of the lubricating liquid used is considerably reduced. Moreover, since a lubricating liquid unnecessary for forming a lubricating coating on the surface of the forging die is not sprayed, there is no need to provide an unnecessary lubricating liquid recovery device, and the forging die can be abbreviated to the forging die. The formation of a uniform lubricating film is not hindered. Further, since pure water is used for cooling the forging die, the cooling efficiency can be improved.
Further, the spray nozzle 17 for spraying the cooling water and the spray nozzle 17 for spraying the lubricating liquid are the same, and the spray nozzle 17 is arranged around the forging die at an optimal position for spraying the cooling water and the lubricating liquid. Therefore, it is possible to further improve the efficiency of cooling the forging die and forming a lubricating film on the surface of the forging die, and the piping around the forging die is not complicated and simple. Become.

  Further, the control device 18 provided in the lubricating devices 1, 1a, 1b according to the first to third embodiments of the present invention includes an optimum amount of cooling water and forging for cooling the forging die to a predetermined temperature. An optimum amount of lubricating liquid for forming a lubricating film on the surface of the mold is input in advance, and while spraying the cooling water or lubricating liquid, each flow meter 10 or 11 allows a predetermined amount of cooling water or lubrication. When the liquid amount is measured, a closing operation signal is output from the control device 18 to the valve body 8 or 9, and the spraying of the cooling water or the lubricating liquid is finished. Thereby, the usage-amount of a cooling water or a lubricating liquid can be suppressed to the minimum necessary, and cooling of a forge die and formation of the lubricating film to a forge die can be achieved easily without waste.

Moreover, in the lubricating devices 1, 1a, and 1b according to the first to third embodiments of the present invention, the amount of cooling water sprayed onto the forging die, the amount of lubricant sprayed, the time of air blowing, etc. can be freely set. Since it can be variably set, it is suitable for conditions such as hot forging that focuses on cooling of the forging die and warm forging that focuses on forming a lubricating film on the forging die and the shape of the molded product. The optimum lubrication conditions can be set freely, which is very effective.
In addition, since the flow meters 10 and 11 are arranged at positions close to the upstream side of the valve bodies 8 and 9, due to expansion of pipes extending from the valve bodies 8 and 9 to the downstream side, compression of the lubricating liquid, and the like. The spray amount of the cooling water or the lubricating liquid from the injection nozzle 17 can be accurately measured by the flow meter 11 without being affected by the pressure loss.

In the lubricating devices 1, 1 a, 1 b according to the first to third embodiments of the present invention, the supply of air from the air compressor 2 is stopped and the valve body of the cooling water supply pipe 5 is controlled by the control device 18. It is possible to open only 8 and feed only the cooling water from the cooling water pressurization tank 4. As an example of use of this embodiment, when the forging die is changed, the cooling water pressurization tank 4 The above-described configuration is adopted when the inside of the mixing unit 15 and the pipe 16 is washed with the cooling water.
Further, in the lubricating devices 1, 1a, 1b according to the first to third embodiments of the present invention, the concentration of the lubricating liquid sprayed from the injection nozzle 17 can be adjusted. That is, air is pumped from the air compressor 2 and all the valve bodies 8 and 9 are opened by the control device 18 to mix the three fluids of air, lubricating liquid, and cooling water, thereby cooling the lubricating liquid with cooling water. Thus, the lubricating liquid can be sprayed from the spray nozzle 17 after being diluted to a predetermined concentration.

FIG. 1 is a schematic diagram of a lubricating device for a forging die according to the first embodiment of the present invention. FIG. 2 is a schematic view of a forging die lubrication device according to a second embodiment of the present invention. FIG. 3 is a schematic view of a lubricating device for a forging die according to the third embodiment of the present invention. FIG. 4 is a schematic diagram of a conventional forging die lubrication apparatus.

Explanation of symbols

1, 1a, 1b Lubrication device, 2 Air compressor (air supply source), 3 Air supply pipe, 4 Cooling water pressurization tank (cooling water supply source), 5 Cooling water supply pipe, 6 Lubricating liquid pressurization tank (lubricating liquid (Supply source), 7 Lubricating liquid supply pipe, 8, 9 Valve body, 10, 11 Flow meter, 15 Mixing part, 16 Pipe, 17 Injection nozzle, 18 Control device, 203 Tube assembly, 21 Liquid flow pipe, 22 2 Tube assembly

Claims (5)

  Each of an air supply pipe communicating with an air supply source, a cooling water supply pipe communicating with a cooling water supply source, a lubricating liquid supply pipe communicating with a lubricating liquid supply source, the cooling water supply pipe and the lubricating liquid supply pipe Each valve body that opens and closes based on an input signal, a mixing part that communicates with each of the air supply pipe, the cooling water supply pipe, and the lubricating liquid supply pipe, and communicates with the mixing part And a forging die lubrication device comprising: an injection nozzle disposed toward the forging die.   2. The forging die lubrication according to claim 1, wherein a flow meter is disposed in the cooling water supply pipe and the lubricating liquid supply pipe at positions adjacent to each other upstream of the valve bodies. apparatus.   Each valve body is connected to a control device that outputs an opening / closing operation signal to each valve body. This control device is connected to each flow meter, and when a predetermined flow rate is measured by each flow meter. The forging die lubrication device according to claim 2, wherein a closing operation signal is output to each valve body. A method for lubricating a forging die,
Spraying a mixed fluid of air and cooling water from an injection nozzle arranged toward the forging die to cool the forging die to an optimum temperature for forming a lubricating film,
Thereafter, a lubrication film is formed on the forging die by spraying two fluids mixed with air and lubricating liquid from the same injection nozzle as the injection nozzle sprayed with cooling water to form a lubricating film on the forging die. After the step of cooling the forging die, removing the cooling water or after the step of spraying the forging die with a lubricating liquid, the surface of the forging die is made substantially uniform to promote drying. The forging die lubrication method according to claim 4, wherein in the step of performing, only air is blown onto the forging die from the same injection nozzle as the injection nozzle sprayed with cooling water and a lubricating liquid.

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