Forging machine and forging method

Abstract

To provide a forging machine capable of sufficiently removing scale.SOLUTION: A forging machine that processes a workpiece using a die includes a finger that grips the workpiece, the finger has a wall portion on which an opposing surface that opposes the workpiece is formed, and the opposing surface is provided with a blowing port that opens toward the workpiece and blows out a fluid.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a forging machine and a forging method. [Background technology]

[0002] Patent Document 1 discloses a descaling device that removes scale from a forging machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-034272 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the forging machine of Patent Document 1, scale is removed using a descaling device that is installed separately from the forging machine. Therefore, depending on the structure of the forging machine, peripheral parts of the workpiece may get in the way, preventing the gas or liquid from being sufficiently sprayed onto the workpiece, and there is a risk that scale may not be removed sufficiently.

[0005] The present invention has been made in view of the above problems, and has as its object to provide a forging machine capable of sufficiently removing scale. [Means for solving the problem]

[0006] According to one aspect of the present invention, a forging machine that processes a workpiece using a die includes fingers that grip the workpiece, the fingers having a wall portion that forms an opposing surface that faces the workpiece, and the opposing surface having an outlet that opens toward the workpiece and sprays a fluid. [Effects of the Invention]

[0007] According to one aspect of the present invention, a fluid is sprayed toward a workpiece from a nozzle in a wall portion, and scale on the workpiece is removed by the fluid. At this time, the nozzle is provided in a wall portion of the finger that grips the workpiece, so the nozzle can be brought close to the workpiece. Therefore, it is possible to prevent peripheral parts of the forging machine from interfering with the fluid being applied to the workpiece, and therefore scale can be sufficiently removed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view illustrating an outline of a forging machine according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view illustrating a conveying device in the forging machine. [Figure 3] FIG. 3 is a front view illustrating a scale removing device in a forging machine. [Figure 4] FIG. 4 is a plan view of FIG. [Figure 5A] FIG. 5A is a plan view of a scale removal device according to a first modified example. [Figure 5B] FIG. 5B is a plan view of a scale removal device according to a second modified example. [Figure 6A] FIG. 6A is a plan view of a scale removal device according to a third modified example. [Figure 6B] FIG. 6B is a plan view of a scale removal device according to a fourth modified example. [Figure 7] FIG. 7 is a plan view of a scale removing device according to a fifth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a forging machine 1 according to an embodiment of the present invention will be described with reference to the drawings.

[0010] First, the overall configuration of the forging machine 1 will be described with reference to Figures 1 and 2. Figure 1 is a front view illustrating an overview of the forging machine 1. Figure 2 is a plan view illustrating a conveying device 30 in the forging machine 1. In each process in the forging machine 1 shown in Figure 1, the shape of the workpiece W before processing is shown on the upstream side (left side in Figure 1) across the center line C, and the shape of the workpiece W after processing is shown on the downstream side (right side in Figure 1) across the center line C.

[0011] Hereinafter, the direction in which the workpiece W is transported (left-right direction in Figure 1) will be referred to as the "transport direction," and the direction in which the finger 40 described later moves relative to the workpiece W (up-down direction in Figure 2) will be referred to as the "opposing direction" or "moving direction."

[0012] The forging machine 1 is a hot forging machine that forges and shapes a workpiece W from metal heated to a high temperature of about 1000° C. or higher. The workpiece W is, for example, a pulley for a transmission.

[0013] 1, the forging machine 1 includes a supply unit 10, a plurality of dies 20, a conveying device 30 (see FIG. 2), a scale removing device 50 (see FIGS. 3 and 4), and a workpiece removal unit 60. The forging machine 1 processes a workpiece W using the dies 20.

[0014] The supply unit 10 holds the workpiece W heated to a high temperature in order to supply it to the mold 20. The supply unit 10 is provided further upstream of the mold 20 in the conveying direction.

[0015] A plurality of dies 20 (four sets in this example) are provided. The dies 20 include, in order from upstream in the conveying direction, a first die 20A, a second die 20B, a third die 20C, and a fourth die 20D. The dies 20A to 20D are each formed in a different shape, and sequentially deform the workpiece W little by little.

[0016] Each die 20 has an upper die 21 and a lower die 22. The lower die 22 is fixed to the main body (not shown) of the forging machine 1. The upper die 21 moves up and down relative to the lower die 22, forms the workpiece W when it approaches the lower die 22, and moves away from the lower die 22 when the workpiece W is transported.

[0017] As shown in FIG. 2, the transport device 30 includes a transfer 31, fingers 40, and a driving device (not shown).

[0018] The transfer 31 is made up of a pair of movable members 32 facing each other. The transfer 31 moves the movable members 32 simultaneously in the conveying direction, thereby moving the fingers 40 in the conveying direction. The transfer 31 moves the movable members 32 closer to each other, thereby moving the pair of opposing fingers 40 that sandwich the workpiece W closer to each other. The transfer 31 moves the movable members 32 away from each other, thereby moving the pair of fingers 40 away from each other.

[0019] Multiple pairs of fingers 40 are provided to sandwich the workpiece W. Here, five pairs of opposing fingers 40 are arranged side by side in the conveying direction. The opposing pairs of fingers 40 sandwich and grip the workpiece W when conveying the workpiece W. The base end 40a of the fingers 40 is attached to the movable member 32 of the transfer 31. The tip end 40b of the fingers 40 is formed in a shape that matches the outer peripheral shape of the workpiece W to be conveyed.

[0020] The position where the fingers 40 grip the workpiece W is a position where the workpiece W can be stably transported, excluding the position where scale removal is desired. The fingers 40 are moved by the transfer 31 in the transport direction and the opposing direction (the direction in which the pair of fingers 40 face each other).

[0021] A pair of fingers 40 that transport the workpiece W from the supply section 10 to the first mold 20A is provided with a scale removal device 50. Here, the pair of fingers 40 located most upstream in the transport direction is provided with the scale removal device 50. This is not a limitation, and the other fingers 40 may also be provided with a scale removal device 50. In other words, at least one pair of fingers 40 out of the multiple pairs provided is provided with a scale removal device 50. The scale removal device 50 will be described in detail later with reference to Figures 3 and 4.

[0022] The drive device includes a mold drive device that moves the upper mold 21 up and down relative to the lower mold 22 in each mold 20, and a conveyance drive device that moves the movable member 32 in the transfer 31 in the conveying direction and the opposing direction.

[0023] The workpiece removal section 60 temporarily holds the workpiece W transferred from the fourth die 20D in order to transfer it to the next process.

[0024] Next, the scale removing device 50 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a front view illustrating the scale removing device 50 in the forging machine 1. Fig. 4 is a plan view of Fig. 3.

[0025] The scale removal device 50 removes scale, which is an oxide film that forms over time on the surface of a workpiece W heated to a high temperature, by spraying a fluid onto the workpiece W. As shown in FIGS. 3 and 4 , the scale removal device 50 is provided on the finger 40. The scale removal device 50 has a wall portion 51, an outlet 52, an opposing surface 53, a supply port 54, and an internal passage 55.

[0026] As shown in FIG. 3, wall portions 51 are provided on the upper part of each finger 40. Specifically, wall portions 51 are welded and fixed to the upper surface of the finger 40. Wall portions 51 have opposing surfaces 53 that face the workpiece W. Wall portions 51 are positioned so that opposing surfaces 53 face the position on the workpiece W from which it is most desirable to remove scale. Here, wall portions 51 are provided on the upper side of fingers 40 because it is most desirable to remove scale formed on the upper side of the side of the workpiece W.

[0027] 4, the wall portion 51 extends beyond the width of the finger 40 in a plan view. Alternatively, the wall portion 51 may be contained within the width of the finger 40.

[0028] The outlet 52 is a hole that opens toward the workpiece W and blows out a fluid. The fluid supplied from the outlet 52 is a gas such as air, a liquid such as a release agent, a liquid obtained by diluting a release agent with another liquid such as water (a liquid containing a release agent), or a mixture of a gas and a liquid. The outlet 52 is provided on the finger 40 and moves in the opposing direction together with the finger 40. Specifically, a plurality of outlets 52 (five in this example) are provided on the opposing surface 53 of the wall portion 51. By providing the outlets 52 on the finger 40, the distance between the workpiece W and the outlet 52 can be reduced to approximately 100 to 50 mm.

[0029] There may be only one air outlet 52 rather than multiple ones. The installation location and number of the air outlets 52, the distance between the workpiece W and the air outlet 52, and the amount and speed of the fluid to be blown out are adjusted depending on the area from which scale is to be removed and the pressure at which the fluid is blown.

[0030] Furthermore, at least one of the outlets 52 (here, the outlet 52 at the center in the width direction) is set to spray the fluid perpendicular to the workpiece W. The other outlets 52 may also be set to spray the fluid perpendicular to the workpiece W. When the fluid is sprayed perpendicular to the workpiece W from the outlet 52, it becomes possible to spray the fluid at high pressure onto the workpiece W, making it possible to remove scale more efficiently.

[0031] The facing surface 53 is a flat surface formed to face the outer peripheral surface of the workpiece W. Since the blowout port 52 is provided on the facing surface 53, the angle of the facing surface 53 matches the angle at which the fluid is blown. The facing surface 53 has an inclined portion 53a.

[0032] The inclined portion 53a is provided at an angle relative to the direction in which the fingers 40 can move so as to surround the periphery of the workpiece W. Specifically, the inclined portion 53a is formed in a generally V-shape in plan view so as to gradually approach the workpiece W from the center toward both sides in plan view. This allows the outlet 52 to be provided on the inclined portion 53a that is provided so as to surround the periphery of the workpiece W, making it possible to more efficiently spray the fluid onto the surface of the workpiece W. This improves the design freedom in terms of the installation location of the outlet 52.

[0033] The supply port 54 is a fluid coupling that supplies fluid, which is supplied from the outside via a hose (not shown), to an internal passage 55 within the wall portion 51.

[0034] The internal passage 55 is provided in the wall portion 51. The internal passage 55 is a passage for distributing the fluid supplied from the supply port 54 to the plurality of outlets 52. The internal passage 55 is formed by plugging the end of a machined through-hole.

[0035] Next, a forging method using the forging machine 1 will be described.

[0036] First, in the forging machine 1, the workpiece W placed in the supply section 10 is transported to the first die 20A by the transport device 30. At this time, while the workpiece W is held by the fingers 40, a fluid is sprayed onto the workpiece W from the outlet 52 provided on the opposing surface 53 of the wall portion 51 provided on the fingers 40, which faces the workpiece W.

[0037] In this way, the fluid is sprayed from the outlet 52 of the wall portion 51 toward the workpiece W, and this fluid removes scale from the workpiece W. At this time, since the outlet 52 is provided on the wall portion 51 provided on the fingers 40 that grip the workpiece W, the outlet 52 can be brought close to the workpiece W. Therefore, it is possible to prevent the fluid from being insufficiently sprayed onto the workpiece W due to interference from peripheral parts of the forging machine 1, and therefore scale can be sufficiently removed.

[0038] At this time, a plurality of fingers 40 are provided so as to sandwich the workpiece W, and the wall portion 51 and the outlet 52 are provided on the fingers 40. Therefore, the fluid can be sprayed from a plurality of directions, which increases the surface area of ​​the workpiece W that is exposed to the fluid, and more scale can be removed.

[0039] In addition, since the wall portion 51 has multiple outlets 52, providing multiple outlets 52 on the wall portion 51 improves the design freedom of the location where the fluid is applied to the workpiece W, thereby increasing the surface area on the workpiece W from which scale can be removed.

[0040] The fluid blown out from the outlet 52 is a release agent or a fluid containing a release agent. As a result, by using the release agent used when removing the workpiece W from the mold 20 for scale removal, it becomes unnecessary to provide water piping and wastewater facilities dedicated to scale removal.

[0041] Next, in the forging machine 1, the workpiece W is shaped in the first die 20A. Thereafter, in the forging machine 1, the workpiece W is transferred to the second die 20B, the third die 20C, and the fourth die 20D in this order, and shaped.

[0042] The workpiece W is simultaneously transported from the supply unit 10 to the first mold 20A, from the first mold 20A to the second mold 20B, from the second mold 20B to the third mold 20C, and from the third mold 20C to the fourth mold 20D by the movement of the movable member 32 of the transfer 31 in the transport direction. At this time, if there is a possibility that scale may be generated during the process, a scale removal device 50 may be provided on the finger 40 while the workpiece W is held by the finger 40, and a fluid may be sprayed onto the workpiece W from the outlet 52.

[0043] That is, in the forging machine 1, the workpiece W is held by the fingers 40 and transported sequentially to a plurality of dies 20, and fluid is sprayed onto the workpiece W from the outlet 52 while it is being transported. As a result, scales are removed while the workpiece W is being moved between the dies 20, and the time required for processing can be shortened compared to when a separate scale removal process is provided.

[0044] The timing for spraying the fluid onto the workpiece W is immediately before the next process during the period (time) in which the workpiece W is transported from the previous process to the next process. Specifically, the timing for spraying the fluid onto the workpiece W is the latter half of the period (time) in which the workpiece W is transported from the previous process to the next process. If the timing for spraying the fluid is too early, new scale will be generated, so by spraying the fluid immediately before the next process, the next process can be carried out before a large amount of new scale is generated. Therefore, the occurrence of pockmarks and the like on the workpiece W can be suppressed.

[0045] Next, first to fifth modified examples of the scale removal device 50 will be described with reference to Fig. 5A to Fig. 7. Fig. 5A is a plan view of the scale removal device 50 according to the first modified example. Fig. 5B is a plan view of the scale removal device 50 according to the second modified example. Fig. 6A is a plan view of the scale removal device 50 according to the third modified example. Fig. 6B is a plan view of the scale removal device 50 according to the fourth modified example. Fig. 7 is a plan view of the scale removal device 50 according to the fifth modified example.

[0046] 5A, the wall portion 51 may have an opposing surface 53 formed as a plane perpendicular to the opposing direction (movable direction) of the fingers 40. In this case, the same effects as those of the above-described embodiment can be achieved.

[0047] 5B, the wall portion 51 may have an opposing surface 53 formed as a substantially U-shaped plane by a plane perpendicular to the opposing direction (moving direction) of the fingers 40 and a pair of planes along the opposing direction of the fingers 40. In this case, the same effects as those of the above-described embodiment can be achieved.

[0048] As in the third modified example shown in Fig. 6A, the wall portion 51 may be formed as a curved surface concentric with the outer peripheral surface of the workpiece W, with the opposing surface 53 being provided to surround the outer peripheral surface of the workpiece W. In this case, the inner surface of the opposing surface 53 is curved but is inclined with respect to the moving direction of the fingers 40, thereby forming an inclined portion 53a. In this case, the same effects as those of the above-described embodiment can be achieved. In addition, it is possible to spray fluid perpendicularly onto the workpiece W from all of the outlets 52.

[0049] 6B, wall portion 51 may be formed in a substantially V-shape along opposing surface 53, which is made up of inclined portions 53a that are formed in a substantially V-shape in plan view. In this case, the same effects as those of the above-described embodiment can be achieved.

[0050] 7, the wall portions 51 may be formed as curved surfaces concentric with the outer peripheral surface of the workpiece W, with the opposing surfaces 53 being provided to surround the outer peripheral surface of the workpiece W, and when the fingers 40 grip the workpiece W, the wall portions 51 may come into contact with each other to surround the entire circumference of the workpiece W. In this case, the same effects as those of the above-described embodiment are achieved. In addition, it is possible to spray the fluid perpendicular to the workpiece W from all of the outlets 52, and it is also possible to spray the fluid all around the workpiece W.

[0051] The configuration and effects of the present embodiment will now be described.

[0052] (1) A forging machine 1 that processes a workpiece W using a die 20 has fingers 40 that grip the workpiece W, and the fingers 40 have wall portions 51 that form opposing surfaces 53 that face the workpiece W, and the opposing surfaces 53 are provided with outlets 52 that open toward the workpiece W and spray fluid.

[0053] (7) In a forging method for processing a workpiece W using a die 20, while the workpiece W is held by fingers 40, a fluid is sprayed onto the workpiece W from an outlet 52 provided on an opposing surface 53 of a wall portion 51 provided on the finger 40 that faces the workpiece W.

[0054] According to these configurations, the fluid is sprayed from the outlet 52 of the wall portion 51 toward the workpiece W, and the fluid removes scale from the workpiece W. At this time, the outlet 52 is provided on the wall portion 51 provided on the fingers 40 that grip the workpiece W, so the outlet 52 can be brought close to the workpiece W. Therefore, it is possible to prevent peripheral parts of the forging machine 1 from getting in the way and preventing the fluid from being sufficiently sprayed on the workpiece W, and therefore it is possible to sufficiently remove scale.

[0055] In addition, there is no need to prepare a dedicated descaling device separately, which reduces costs. There is also no need to secure space for the dedicated descaling device, and there is no need to design a descaling process.

[0056] (2) The opposing surface 53 has an inclined portion 53a that is inclined with respect to the direction in which the fingers 40 move so as to surround the periphery of the workpiece W.

[0057] According to this configuration, the outlet 52 can be provided on the inclined portion 53a that is installed so as to surround the periphery of the workpiece W, making it possible to more efficiently spray the fluid onto the surface of the workpiece W. Therefore, the degree of freedom in designing the installation location of the outlet 52 can be improved.

[0058] (3) The outlet 52 is set so as to spray the fluid perpendicularly to the workpiece W.

[0059] According to this configuration, it is possible to spray the fluid at high pressure onto the workpiece W, making it possible to remove scale more efficiently.

[0060] (4) A plurality of fingers 40 are provided so as to sandwich the workpiece W, and the wall portion 51 and the air outlet 52 are provided on each finger 40.

[0061] According to this configuration, the fluid can be sprayed from multiple directions, increasing the surface area of ​​the workpiece W that is exposed to the fluid, and thus more scale can be removed.

[0062] (5) The wall portion 51 has a plurality of air outlets 52 .

[0063] According to this configuration, by providing a plurality of outlets 52 on the wall portion 51, the degree of freedom in designing the location on the workpiece W where the fluid hits can be improved, and the surface area of ​​the workpiece W from which scale can be removed can be increased.

[0064] (6) The fluid blown out from the blowout port 52 is a release agent or a liquid obtained by diluting the release agent with water or the like.

[0065] According to this configuration, by using the mold release agent used when removing the workpiece W from the mold 20 for scale removal, it becomes unnecessary to provide water piping and wastewater facilities dedicated to scale removal.

[0066] (8) With the workpiece W held by the fingers 40, the workpiece W is transported sequentially to a plurality of dies 20, and fluid is sprayed onto the workpiece W from the outlet 52 during transportation.

[0067] According to this configuration, scale removal is performed during movement between the dies 20, so the time required for processing can be shortened compared to when a separate scale removal process is provided.

[0068] (9) The timing for spraying the fluid onto the workpiece W is immediately before the next process during the period in which the workpiece W is transported from the previous process to the next process.

[0069] According to this configuration, if the timing of spraying the fluid is too early, new scale will be generated, so by spraying the fluid just before the next process, the next process can be performed before a lot of new scale is generated. Therefore, it is possible to prevent pockmarks and the like from being generated on the workpiece W.

[0070] Although an embodiment of the present invention has been described above, the above embodiment merely shows one application example of the present invention, and is not intended to limit the technical scope of the present invention to the specific configuration of the above embodiment. [Explanation of symbols]

[0071] 1 Forging machine 20 Mold 40 Finger 51 Wall 52 Air Outlet 53 Opposite Surface 53a Slope double work

Claims

1. A forging machine for processing a workpiece using a mold, comprising: fingers for gripping the workpiece, wherein the fingers have a wall portion on which an opposing surface facing the workpiece is formed, and the opposing surface is provided with a blowing outlet that opens toward the workpiece and blows out fluid. Forging machine.

2. The forging machine according to Claim 1, wherein the opposing surface has an inclined portion provided inclined with respect to the movable direction of the fingers so as to surround the workpiece. Forging machine.

3. The forging machine according to Claim 2, wherein the blowing outlet is set to blow the fluid perpendicularly to the workpiece. Forging machine.

4. The forging machine according to any one of Claims 1 to 3, wherein a plurality of the fingers are provided so as to sandwich the workpiece, and the wall portion and the blowing outlet are provided on respective ones of the fingers. Forging machine.

5. The forging machine according to any one of Claims 1 to 3, wherein the wall portion has a plurality of the blowing outlets. Forging machine.

6. The forging machine according to any one of Claims 1 to 3, wherein the fluid blown out from the blowing outlet is a release agent or a liquid obtained by diluting the release agent with water or the like. Forging machine.

7. A forging method for processing a workpiece using a mold, comprising: while gripping the workpiece with fingers, blowing fluid onto the workpiece from a blowing outlet provided on an opposing surface of a wall portion provided on the fingers and facing the workpiece. Forging method.

8. The forging method according to Claim 7, wherein while gripping the workpiece with the fingers, the workpiece is sequentially conveyed to a plurality of the molds, and fluid is blown onto the workpiece from the blowing outlet during the conveyance. Forging method.

9. ​ ​ ​

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