JP3218003U - Forging press - Google Patents

Abstract

In a forging press apparatus in which a thickness adjustment plate is fixed to a die holder for thickness adjustment after repair of the die holder, the fixed state of the thickness adjustment plate is stably maintained, Make sure that the positional relationship with the lower mold does not go wrong.
A forging press apparatus includes a die holder 11 that holds a die, a holder base that supports the die holder on a press machine, and a thickness adjusting plate 12 that is fixed to a side surface of the holder base of the die holder. The thickness adjusting plate has a thickness that compensates for the thinning of the die holder by cutting for repairing the surface of the die holder that holds the die, and is fixed to the die holder by welding (weld bead 13). Has been.
[Selection] Figure 2

Description

  The present invention relates to a forging press apparatus.

  The following Patent Document 1 shows an example of a forging press apparatus. In such a forging press apparatus, the upper die and the lower die are respectively held by upper and lower die holders. In the die holder, a part that holds the mold is worn particularly by long-term use, and cracks are generated in the part. On the other hand, the die holding surface of the die holder is cut and regenerated to the same state as a new one. Along with this cutting process, the die holder becomes thinner in the direction of surface matching to the mold. Therefore, a thickness adjusting plate is fixed to the side of the holder base opposite to the die holding surface of the die holder so that the thickness of the die holder is the same as the initial state before repair. Here, the thickness adjusting plate is fixed to the die holder by bolt fastening.

JP 2017-225976 A

  However, the fixing of the thickness adjusting plate to the die holder by bolt fastening may loosen the bolt, and the fixing may become unstable. Therefore, there is a problem that the positional relationship between the upper die and the lower die of the forging press apparatus is out of order, and the quality of the forged product that is a workpiece is lowered.

  In view of such problems, an object of the present invention is to fix the thickness adjusting plate to the die holder by welding in a forging press device in which the thickness adjusting plate is fixed to the die holder for adjusting the thickness after repairing the die holder. There is. Thereby, the fixed state of the thickness adjusting plate with respect to the die holder is stably maintained, and the positional relationship between the upper die and the lower die of the forging press apparatus is prevented from being out of order.

  A first device is a forging press device that reciprocates one of a pair of molds facing each other with a press machine and strikes a metal body as a workpiece with the pair of molds to form a desired shape. A die holder for holding the mold, a holder base for supporting the die holder on the press, and a thickness adjusting plate fixed to a side surface of the holder base of the die holder. The thickness adjusting plate has a thickness that compensates for a decrease in the thickness of the die holder due to a cutting process for repairing the surface of the die holder that holds the mold, and is fixed to the die holder by welding. Has been.

  According to the first device, since the thickness adjusting plate is fixed to the die holder by welding, the fixed state of the thickness adjusting plate to the die holder is stably maintained. It is possible to prevent the positional relationship between the two from being out of order.

  A second device is the above-described first device, wherein the pair of molds are an upper die and a lower die arranged in a vertical direction, and the die holder holds the lower die.

  The die holder that holds the lower die is more susceptible to damage associated with the forging of the workpiece than the die holder that holds the upper die. According to the second device, since the fixing of the thickness adjusting plate by welding is applied to the die holder that holds the lower die, the effect of increasing the bonding strength of the thickness adjusting plate to the die holder can be more effectively utilized.

  According to a third aspect of the present invention, in the first or second aspect, the thickness adjusting plate is welded to the die holder by fillet welding at a joint boundary between the die holder and the thickness adjusting plate. .

  According to the third device, since the thickness adjusting plate is joined and fixed to the die holder by fillet welding, the welding length can be easily secured and the joining strength can be increased. In addition, it is possible to widen the joining region by increasing the welding length, and to avoid the occurrence of stress concentration at specific joining locations during use as a forging press device.

  A fourth device is the above-described first or second device, wherein the thickness adjusting plate is welded to the die holder by forming a through hole on the surface of the thickness adjusting plate facing the die holder and using the through hole. It is done by plug welding.

  According to the fourth device, since the thickness adjusting plate is fixed to the die holder by plug welding on the surface of the thickness adjusting plate, welding is performed with a degree of freedom at a necessary portion on the surface of the thickness adjusting plate. It can be carried out. Accordingly, the bonding strength of the thickness adjusting plate to the die holder can be increased.

  According to a fifth aspect of the present invention, in the fourth aspect, the through hole has an inner diameter that is at least 1.5 times the thickness of the thickness adjusting plate.

  In plug welding, it is necessary to insert a welding rod into the through hole. At that time, according to the fifth device, since the inner diameter for inserting the welding rod is secured in the through hole, sufficient penetration due to welding is formed in the surface portion of the die holder facing the through hole. be able to. Accordingly, the bonding strength of the thickness adjusting plate to the die holder can be increased.

  A sixth device is any one of the first to fifth devices, wherein the thickness adjusting plate is divided into a plurality of sheets in an in-plane direction of the holder base side surface of the die holder. Each thickness adjusting plate is fixed to the die holder by welding.

  According to the sixth device, since the plurality of divided thickness adjusting plates are respectively fixed to the die holder by welding, the joint strength of the entire thickness adjusting plate to the die holder can be increased.

  The seventh device is the above-mentioned sixth device, wherein the plurality of thickness adjusting plates have higher shock resistance or wear resistance on the side of the holder base of the die holder and closer to the center than on the periphery. Yes.

  In general, since the mold is held at the center portion of the die holder, the stress received during forging of the workpiece becomes larger toward the center portion side than at the peripheral portion side of the die holder. According to the seventh invention, the impact resistance or wear resistance of the thickness adjusting plate located on the center side of the die holder is made higher than that located on the peripheral side. Therefore, the durability of the die holder including the thickness adjusting plate can be enhanced.

It is a disassembled perspective view which shows the principal part of the forge press apparatus which is 1st Embodiment of this invention. It is a perspective view which shows the die holder in 1st Embodiment upside down with the thickness adjustment board. It is a front view which shows the die holder in 1st Embodiment upside down with the thickness adjustment board. It is the IV-IV sectional view taken on the line of FIG. It is a perspective view corresponding to FIG. 2 which shows the die holder in the forge press apparatus which is 2nd Embodiment of this invention with a thickness adjustment board. It is a front view corresponding to Drawing 3 showing the die holder in a 2nd embodiment with a thickness adjustment board. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. It is a perspective view corresponding to FIG. 2 which shows the die holder in the forge press apparatus which is 3rd Embodiment of this invention with a thickness adjustment board. It is a front view corresponding to Drawing 3 showing the die holder in a 3rd embodiment with a thickness adjustment board. FIG. 10 is a sectional view taken along line XX in FIG. 9.

<Overall Configuration of First Embodiment>
FIG. 1 shows a main part of a forging press apparatus according to a first embodiment of the present invention. This forging press apparatus is general in the range shown in FIG.

  In FIG. 1, in order to make the internal structure easy to understand, the upper die 1 and the upper die holder 16 and the like holding the upper die 1, and the lower die 2 and the lower die holder 11 and the like holding the upper die 1 are shown in FIG. It is shown separated into two sides. The upper die holder 16 is coupled via a holder base 17 to a slider portion that moves up and down in a press (not shown). Further, the lower die holder 11 is coupled to a bed portion below the press machine via a holder base 18.

  Here, two upper molds 1 and two lower molds 2 are provided, and are fixed to the die holders 11 and 16 by front clamps 5 and 7 and rear blocks 6 and 8, respectively. In each of the two upper molds 1 and the lower mold 2, a series of forging processes can be performed continuously. Hard plates 3 and 4 are sandwiched between the upper mold 1 and the lower mold 2 and the die holders 11 and 16, respectively. The hard plates 3 and 4 are provided to prevent the die holders 11 and 16 from being worn by the upper mold 1 and the lower mold 2. The upper mold 1 and the lower mold 2 are not limited to two each provided, but may be one each or a combination of three or more.

  A columnar guide post 10 is provided so as to protrude upward at a corner of the upper surface of the lower die holder 11 which is substantially rectangular in plan view. In FIG. 1, only two guide posts 10 are illustrated, and two guide posts 10 provided symmetrically on the opposite side with respect to the two guide posts 10 with the lower mold 2 interposed therebetween are not illustrated. Yes.

  A cylindrical guide bush 9 that fits into the guide post 10 is provided at the lower corner of the upper die holder 16 that is generally rectangular in plan view. In FIG. 1, only two guide bushes 9 are illustrated, and the two guide bushes 9 provided symmetrically on the opposite side of the upper mold 1 with respect to the two guide bushes 9 are omitted. Yes.

  When the upper die holder 16 is reciprocated against the lower die holder 11 with each guide post 10 fitted to each guide bush 9, the upper die 1 is reciprocated against the lower die 2. Forging a workpiece (not shown).

  A thickness adjusting plate 12 is fixed to the entire area of the lower surface of the lower die holder 11. The thickness adjusting plate 12 is provided to adjust that the upper surface of the die holder 11 is cut by repair and the thickness of the die holder 11 is reduced. Here, the thickness adjusting plate 12 is provided only for the lower die holder 11. However, when the upper die holder 16 is cut by repair, the thickness adjusting plate is also provided on the upper surface of the upper die holder 16. (Not shown) is fixed.

<Configuration of Die Holder 11 and Thickness Adjustment Plate 12>
2 to 4 show the die holder 11 and the thickness adjusting plate 12. Here, in order to make the structure for fixing the thickness adjusting plate 12 to the die holder 11 easier to understand, the structure is shown upside down.

  The thickness adjusting plate 12 is adjusted to compensate for the thickness of the die holder 11 that has been cut. The thickness adjusting plate 12 is overlapped with the lower surface of the die holder 11 in a face-to-face relationship, and the joining boundary portion is joined by fillet welding by arc welding. Welding is performed on the entire four sides of a generally rectangular shape in plan view. Therefore, the weld bead 13 is formed in the whole joining boundary part.

  Further, the thickness adjusting plate 12 is formed with a plurality (four in this case) of through holes 12a penetrating the upper and lower surfaces of the thickness adjusting plate 12 so as to be evenly distributed on the plane. Plug welding is performed. Therefore, the weld metal 14 is filled in the through hole 12a. As shown in FIG. 3, the inner diameter Φ of the through hole 12 a is 1.5 times or more the plate thickness t of the thickness adjusting plate 12. This is because, when performing plug welding, it is easy to insert a welding rod (not shown) into the through hole 12a, and sufficient penetration due to welding is formed in the surface portion of the die holder 11 facing the through hole 12a. is there.

<Operation and Effect of First Embodiment>
According to the first embodiment, the thickness adjusting plate 12 is fixed to the die holder 11 by fillet welding and plug welding. Therefore, the bolt is not loosened during the operation of the forging press device and the fixing state is not unstable, as in the case where the fixing is performed by the bolt, and the thickness adjusting plate 12 is fixed to the die holder 11. Is stably maintained. Therefore, it is possible to prevent the positional relationship between the upper die 1 and the lower die 2 of the forging press apparatus from being out of order. It should be noted that whether fillet welding is performed on the entire bonding boundary between the die holder 11 and the thickness adjusting plate 12 or only a part thereof can be determined according to the required bonding strength. Further, the presence / absence and number of plug welds can also be determined according to the required bonding strength.

  In the first embodiment, since the thickness adjusting plate 12 is fixed to the die holder 11 by fillet welding, it is possible to avoid stress concentration at the fixing portion as compared with the case where the fixing is performed by a bolt. . This is because fillet welding is performed over a wide range on the entire joining boundary between the die holder 11 and the thickness adjusting plate 12.

<Configuration of Second Embodiment>
5 to 7 show a second embodiment of the present invention. The feature of the second embodiment over the first embodiment (see FIGS. 2 to 4) is that the thickness adjusting plate 12 is changed to the thickness adjusting plate 22. The thickness adjusting plate 12 is composed of a single steel plate, whereas the thickness adjusting plate 22 is divided into a plurality of (here, 12) steel plates in the in-plane direction on the side of the holder base 18 of the die holder 11. Configured.

  The thickness adjusting plate 22 is a fillet welded to the die holder 11 in the same manner as the thickness adjusting plate 12 of the first embodiment, with the thickness adjusting plate 221 divided into a plurality of sheets as a single plate. Yes. Therefore, a weld bead 23 is formed around the thickness adjusting plate 22. On the other hand, arc welding is also performed between the divided surfaces of the thickness adjusting plate 221 divided into a plurality of sheets. Here, in order to facilitate the welding operation, the adjacent dividing surfaces of the thickness adjusting plates 221 are formed by inclined surfaces, and the upper side is open as shown in FIGS. And between each division surface, the weld metal 25 by arc welding is filled. In this arc welding, the thickness adjusting plates 221 are joined together, and the thickness adjusting plates 221 are individually joined on the die holder 11.

  In addition, each thickness adjusting plate 221 has one through hole 22a formed in the center on the plane passing through the upper and lower surfaces, and plug welding is performed in the through hole 22a. . Therefore, the weld metal 24 is filled in the through hole 22a. The inner diameter Φ of the through hole 22a is 1.5 times or more the plate thickness t of the thickness adjusting plate 221. This is because, when performing plug welding, it is easy to insert a welding rod (not shown) into the through hole 22a, and sufficient penetration due to welding is formed in the surface portion of the die holder 11 facing the through hole 22a. is there.

<Operation and Effect of Second Embodiment>
According to the second embodiment, since the plurality of divided thickness adjusting plates 221 are fixed to the die holder 11 by welding, respectively, the bonding strength of the thickness adjusting plate 22 to the die holder 11 can be increased. it can.

<Configuration of Third Embodiment>
8 to 10 show a third embodiment of the present invention. A feature of the third embodiment over the second embodiment (see FIGS. 5 to 7) is that the thickness adjusting plate 22 is changed to a thickness adjusting plate 32. The thickness adjusting plate 22 is configured by dividing one steel plate into 12 sheets, whereas the thickness adjusting plate 32 is configured by dividing one steel plate into 9 sheets. Further, the thickness adjusting plate 322 located at the center of the nine divided steel plates is made of a material having higher strength than the eight thickness adjusting plates 321 located at the periphery. . For example, the thickness adjusting plate 321 is 590 N / mm ² grade high strength steel, whereas the thickness adjusting plate 322 is 780 N / mm ² grade high strength steel. As a result, the thickness adjusting plate 322 located in the center of the thickness adjusting plate 32 is superior in impact resistance and wear resistance to the thickness adjusting plate 321 located in the periphery.

  A weld bead 33 is formed around the thickness adjusting plate 32. Further, a weld metal 35 by arc welding is filled between adjacent thicknesses of the thickness adjusting plates 321 and the thickness adjusting plates 322. Further, a weld metal 34 is filled in each through hole 32a.

<Operation and Effect of Third Embodiment>
As shown in FIG. 1, since the lower die 2 is held at the center portion of the die holder 11, the stress received when forging a workpiece (not shown) becomes larger toward the center portion side than at the peripheral portion side of the die holder 11. According to the third embodiment, the impact resistance and wear resistance of the thickness adjusting plate 322 located on the center side of the die holder 11 are made higher than the thickness adjusting plate 321 located on the peripheral side. The durability of the die holder 11 including the thickness adjusting plate 322 can be enhanced.

<Other embodiments>
Although specific embodiments have been described above, the present invention can be implemented in various forms without being limited to these embodiments. For example, the forging press device of the present invention is not limited to a pair of molds opposed to each other in the vertical direction, and may be a unit opposed to the horizontal direction. In the above embodiment, the thickness adjusting plate is fixed to the die holder by fillet welding and plug welding, but may be performed by other types of welding. Further, various known structures can be applied to the basic structure of the forging press apparatus, such as a mold holding structure for the die holder.

1 Upper mold 2 Lower mold 3, 4 Hard plate 5, 7 Front clamp 6, 8 Rear block 9 Guide bush 10 Guide post 11, 16 Die holder 12, 22, 32 Thickness adjustment plate 13, 23, 33 Weld bead 14, 24 , 34 Weld metal 17, 18 Holder base 25, 35 Weld metal

Claims (7)

A forging press device that reciprocates one of a pair of molds facing each other by a press machine and strikes a metal body as a workpiece with the pair of molds into a desired shape,
A die holder for holding the mold;
A holder base for supporting the die holder on the press;
A thickness adjusting plate fixed to the holder base side surface of the die holder;
The thickness adjusting plate has a thickness that compensates for a decrease in the thickness of the die holder due to a cutting process for repairing the surface of the die holder that holds the mold, and is fixed to the die holder by welding. Forging press equipment. In claim 1,
The pair of molds are an upper mold and a lower mold arranged in the vertical direction,
The die holder holds the lower mold. Forging press apparatus. In claim 1 or 2,
The forging press apparatus, wherein the thickness adjusting plate is welded to the die holder by fillet welding at a joint boundary between the die holder and the thickness adjusting plate. In claim 1 or 2,
Welding of the thickness adjusting plate to the die holder is performed by opening a through hole on the surface of the thickness adjusting plate facing the die holder and performing plug welding using the through hole. In claim 4,
The through hole has an inner diameter that is at least 1.5 times the thickness of the thickness adjusting plate. In any one of Claims 1-5,
The thickness adjusting plate is divided into a plurality of sheets in the in-plane direction of the holder base side surface of the die holder,
A plurality of divided thickness adjusting plates are each fixed to the die holder by welding. In claim 6,
The forging press apparatus in which the plurality of thickness adjusting plates have higher shock resistance or wear resistance on the side of the holder base of the die holder toward the center side than on the peripheral side.

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