JP2005262296A - Die set for forging and forging facility using this die set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die set with which a forged product can be formed into the uniform outer diameter and thickness. <P>SOLUTION: The die set 10 for forging is provided with a lower upsetting die 19, a movable type ring die 22, an upper upsetting die 34 arranged on a height adjusting table 32, a height adjusting mechanism 50, etc. The movable type ring die 22 can be shiftable in the horizontal direction to the lower upsetting die 19. The height adjusting mechanism 50 contains a first gear part 51, a second gear part 52 and an actuator 53, and the height of the height of the height adjusting table 32 is changed to an upper fitting table 31 by rotating the height adjusting table 32 around the axis Z in the vertical direction. On the way of forming a work W at the interval between the lower upsetting die 19 and the upper upsetting die 34, the movable type ring die 22 is shifted in the horizontal direction by abutting a part of the work W on a part of the inner peripheral surface 40 of the movable type ring die 22. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a forging die apparatus used when forming a forged product and a forging facility using the same.

When forming a metal product or the like by forging, three types of free forging, die forging, and intermediate forging are known depending on the form of the mold apparatus. (For example, refer to FIG. 1, FIG. 7, FIG. 9 etc. of Patent Document 1 below)
In the free forging, molding is performed between the lower upsetting mold 2 and the upper upsetting mold 3 without restricting the outer periphery of the workpiece W as in the forging die apparatus 1 shown in FIG.
In die forging, molding is performed in a state in which the workpiece W is sealed between the lower upsetting die 5 and the upper upsetting die 6 as in the forging die device 4 shown in FIG.

In the intermediate forging, like the forging die device 7 shown in FIG. 14, the center portion of the workpiece W is restrained by the lower upsetting die 8 and the upper upsetting die 9, and the outer periphery of the workpiece W is not restricted. Molding is performed.
Japanese Patent Laid-Open No. 11-254079

  In the free forging shown in FIG. 12, since the molding is performed in a state where the outer periphery of the workpiece W is not constrained, a product with a uniform thickness can be obtained, but there is a problem that the outer diameter of the product tends to be non-uniform. is there. In particular, when unevenness of heating occurs in the workpiece W before molding, variation in molding resistance due to wear of the molding surfaces of the molds 2 and 3, or when the workpiece W itself before molding is distorted, The outer diameter of the molded product becomes even more uneven.

  In the case of die forging shown in FIG. 13, since the molding is performed in a state where the outer periphery of the workpiece W is constrained by the upsetting dies 5, 6, the outer periphery of the product can be made uniform (true circle). On the other hand, in die forging, the stress generated on the workpiece W and the dies 5 and 6 during molding is large, and the dies 5 and 6 are easily worn. In addition, there is a drawback that the thickness of the molded product tends to be uneven.

  In the case of intermediate forging shown in FIG. 14, since the central portion of the workpiece W is restrained by the upper and lower upsetting dies 8 and 9, the central portion of the workpiece W can be formed into an accurate shape. However, since the outer periphery of the workpiece W is not constrained, there is a problem that the outer periphery of the molded product tends to be uneven.

  As described above, if the outer diameter and thickness of the molded product are non-uniform, the influence of non-uniform outer diameter and thickness will remain even if finish molding or machining is performed thereafter. The product may be defective. Further, when machining the outer surface of the product, a portion where a predetermined finishing allowance cannot be secured occurs, which causes a defective product such as a so-called black skin residue.

  Also, a plurality of processes such as upsetting process (first stage), rough forming process (second stage), finish forming process (third stage), and deburring process (fourth stage) are sequentially performed by one press machine. In the forging equipment to be performed, there has been a problem that the thickness of the product formed in the first stage varies.

  The cause is that the press load obtained by one press machine is limited. For example, when molding is performed only with the first stage in a state where there is no workpiece on the third stage, the workpiece exists on the third stage. Compared to the case, the workpiece is excessively pressed. On the other hand, when the molding is performed in the first stage in a state where the workpiece is present in the third stage, the load of the press machine is distributed to the two stages, so that the thickness of the workpiece is reduced in the first stage. Thus, the thickness of the product may vary.

  Accordingly, an object of the present invention is to provide a forging die device capable of accurately forming a workpiece into a predetermined shape and forming the workpiece into a certain thickness, and a forging facility using the same. There is.

  The forging die device of the present invention based on the first aspect includes a lower upset mold having a molding surface on which a workpiece is placed, and an internal thread portion provided so as to be movable up and down relative to the lower upset mold and extending in the vertical direction. An upper mounting base, a male threaded portion that engages with the female threaded portion, and a height adjusting base that is held by the upper mounting base by screwing the male threaded portion into the female threaded portion, and the height A height adjustment mechanism capable of changing the height of the height adjustment table relative to the upper mounting table by rotating the adjustment table around an axis extending in the vertical direction, and is fixed to the height adjustment table, An upper upsetting mold having a forming surface facing the forming surface of the lower upsetting mold and forming the workpiece with the forming surface of the lower upsetting mold when lowered toward the lower upsetting mold Arranged in a horizontal posture with respect to the lower upsetting mold and horizontal And a movable mobile ring type direction.

  The movable ring mold has a circular inner peripheral surface as viewed from above, the work is disposed inside the movable ring mold, and the work is molded between the lower upsetting mold and the upper upsetting mold. A part of the workpiece moves in the horizontal direction by being in contact with the inner peripheral surface in the middle, and the outer periphery of the workpiece is constrained by the inner peripheral surface in a state where the upper upset mold reaches the descending end. In this way, the molding is completed.

  In a preferred embodiment of the present invention, the movable ring mold is biased upward, and the movable ring mold moves downward in a state where the lower surface of the upper upsetting mold is in contact with the upper surface of the movable ring mold. A gap mechanism formed between the cushioning mechanism that permits this and the outer peripheral surface of the movable ring mold and the outer peripheral surface of the lower upset mold, and when the workpiece is molded, And a gap portion that allows the excess of the outer peripheral portion to protrude downward.

  In the present invention, an example of the height adjusting mechanism includes a circular or arc-shaped first gear portion formed in a circumferential direction of the height adjusting table, and a second gear meshing with the first gear portion. And an actuator for rotating the height adjusting table via the first gear portion by driving the second gear portion.

  The forging equipment of the present invention based on the second aspect includes the forging die device, a downstream die device for further forming a workpiece formed by the forging die device, and the forging die device. Controls a workpiece detecting means for detecting whether or not the workpiece has been supplied and detecting whether or not the workpiece has been supplied to the downstream mold apparatus, and a height adjusting mechanism of the forging mold apparatus. Control means.

  In the state where the workpiece is supplied to the forging die device and the workpiece is not supplied to the downstream mold device, the control means moves the height adjustment table to the first height adjustment mechanism by the height adjustment mechanism. In the state where the workpiece is supplied to the forging die device and the workpiece is supplied to the downstream die device, the height adjusting base is moved by the height adjusting mechanism. It is displaced to a second height lower than the height.

  According to the forging die device of the present invention, a product having a uniform outer diameter and thickness can be obtained, and the thickness of the product can be finely adjusted as necessary. According to the forging facility of the present invention, in a forging facility in which a plurality of mold devices are simultaneously driven by a single press, regardless of whether a workpiece is present in the downstream mold device, the upstream mold The thickness of the product molded by the mold apparatus can be made uniform.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 2 schematically shows an outline of the forging facility 100. The forging facility 100 includes a lower mold base 101, an upper mold base 102, a transfer device 103 such as a transfer chuck, a press machine 104 that drives the upper mold base 102, and the like. The upper mold base 102 can move in the vertical direction along the guide member 105.

  The forging equipment 100 includes a first stage ST1 that performs a first process (upsetting process), a second stage ST2 that performs a second process (rough forming process), and a third stage that performs a third process (finish forming process). Stage ST3 and 4th stage ST4 which performs a 4th process (flashing process) are provided. These processes are performed by one press 104.

  On the first stage ST1, a lower mold unit 11 and an upper mold unit 12 constituting a forging die apparatus 10 described later are arranged. A mold apparatus 112 having a lower mold unit 110 and an upper mold unit 111 for rough molding is disposed on the second stage ST2. On the third stage ST3, a mold apparatus 115 having a lower mold unit 113 and an upper mold unit 114 for finish molding is arranged. On the fourth stage ST4, a mold apparatus 118 having a lower mold unit 116 and an upper mold unit 117 for deburring is arranged.

  Since the press load obtained by one press 104 is limited, in the forging facility 100, when two workpieces W are simultaneously formed in the first stage ST1 and the third stage ST3, the second stage ST2 is used. And the fourth stage ST4 is idle. When the workpiece W is simultaneously formed in the second stage ST2 and the fourth stage ST4, the first stage ST1 and the third stage ST3 are idled. In this way, two workpieces W are sequentially sent by the transfer device 103 between the stages ST1 to ST4.

  FIG. 1 shows a mold apparatus 10 for the first step. The mold apparatus 10 includes a lower mold unit 11 and an upper mold unit 12. The lower mold unit 11 includes a lower mold clamper 15, a lower mounting base 16, a knockout pin 17, a spacer 18, a lower upset mold 19, a presser fitting 20, a mounting ring 21, and a movable ring type (floating). Ring type) 22, a cushion mechanism 23, and the like.

  The lower upsetting mold 19 is disposed on the lower mounting base 16 via a spacer 18. A flat molding surface 25 on which the work (material) W is placed is formed on the upper surface side of the lower upsetting mold 19. The molding surface 25 is circular when viewed from above. The lower upsetting mold 19 is held at a predetermined position by a presser fitting 20 through an attachment ring 21.

  The presser fitting 20 is fixed to the lower mold clamper 15 with bolts 26. The workpiece (material) W before forming has a cylindrical shape and is previously cut to a predetermined length by a cutting device. The workpiece W is placed on the molding surface 25 of the lower upset mold 19 in a posture in which the axis of the workpiece W is set up vertically.

  The upper mold unit 12 includes an upper mold clamper 30, an upper mounting base 31, a substantially cylindrical height adjusting base 32, a knockout pin 33 provided on the height adjusting base 32, an upper upsetting mold 34, an attachment A ring 35 and a height adjusting mechanism 50 described later are provided. The axis Z of the height adjustment base 32 extends in the vertical direction.

  The upper upsetting die 34 is provided so as to be movable up and down in a state of being separated above the molding surface 25 of the lower upsetting die 19, and by a press machine 104 schematically shown in FIG. 2, the rising end S 1 shown in FIG. It is driven in the vertical direction across the descending end S2 shown in FIG.

  The upper upsetting die 34 has a flat forming surface 36 at a position facing the forming surface 25 of the lower upsetting die 19. The molding surface 36 has a circular shape when viewed from below. When the upper upsetting die 34 is lowered toward the lower upsetting die 19, the workpiece W is formed into a disk shape between the forming surface 25 of the lower upsetting die 19 and the forming surface 36 of the upper upsetting die 34. The The upper upsetting die 34 is fixed to the height adjustment base 32 by means of a mounting ring 35 and a bolt 37. The knockout pin 33 is urged downward by a spring 38.

  A female thread portion 31 a extending in the vertical direction (axis Z direction) is formed in the upper mounting base 31. A male screw portion 32 a is formed on the outer periphery of the height adjustment base 32. The height adjusting base 32 is held on the upper mounting base 31 by the female screw part 31a and the male screw part 32a being screwed together.

  The movable ring mold 22 is arranged in a horizontal posture with respect to the lower upsetting mold 19. The movable ring die 22 can move relative to the molding surface 25 of the lower upsetting die 19 in the horizontal direction. That is, the movable ring mold 22 can move in all directions (the direction indicated by the arrow Y in FIG. 1) within a horizontal plane.

  The movable ring mold 22 has a circular inner peripheral surface 40 as viewed from above, and the workpiece W is arranged inside the inner peripheral surface 40. As shown in FIGS. 1 and 4, the inner peripheral surface 40 of the movable ring mold 22 is inclined in a tapered shape so that the inner diameter on the upper side is slightly larger than the inner diameter on the lower side.

  This movable ring mold 22 is horizontal when a part of the workpiece W comes into contact with the inner peripheral surface 40 during the molding of the workpiece W between the lower upsetting mold 19 and the upper upsetting mold 34. It can move in the direction, i.e. radial direction. Then, in a state where the upper upsetting die 34 reaches the descending end S2, the forming (sealing forging) is completed in a state where the entire outer periphery of the workpiece W is constrained by the inner peripheral surface 40 of the movable ring die 22. It has become.

  The cushion mechanism 23 includes a plurality of spring members 24 (for example, elastic members such as coil springs or gas springs) arranged at a plurality of locations along the circumferential direction of the movable ring mold 22. The cushion mechanism 23 always urges the movable ring mold 22 upward.

  As shown in FIG. 1, when the upper mold unit 12 is raised, the movable ring mold 22 is held at a predetermined height by a mounting ring 21 that functions as a stopper on the rising side.

  As shown in FIG. 4, in a state where the upper mold unit 12 is lowered, the lower surface of the upper upsetting mold 34 comes into contact with the upper surface of the movable ring mold 22 and the spring member 24 is pushed downward, thereby moving the movable ring mold. 22 is displaced downward. By the cushion mechanism 23 having these spring members 24, the movable ring mold 22 is allowed to move downward during pressing.

  When the upper mold unit 12 is lowered between the inner peripheral surface 40 of the movable ring mold 22 and the outer peripheral surface of the lower upset mold 19 (the state shown in FIG. 4), that is, when the work W is formed, A gap portion G is formed that allows the excess of the outer peripheral portion to protrude downward. The gap G is formed over the entire circumference of the lower upsetting mold 19.

  The height adjustment mechanism 50 includes a circular first gear portion 51 formed in the circumferential direction of the height adjustment base 32, a second gear portion (for example, a rack) 52 that meshes with the first gear portion 51, and And an actuator 53 that rotates the height adjustment base 32 via the first gear portion 51 by driving the second gear portion 52 in the horizontal direction. The first gear portion 51 is formed on the outer periphery of the mounting ring 35, for example. The first gear portion 51 may be formed in a part of the circumference (arc shape) instead of being provided on the entire circumference of the height adjusting table 32.

  The actuator 53 has a slider member 60 driven by compressed air. The second gear portion 52 is provided at the lower end portion of the slider member 60. The slider member 60 can reciprocate in the horizontal direction over the first position P1 and the second position P2 shown in FIG. 3 along the guide member 61 extending in the horizontal direction. Depending on the positions P1 and P2 of the slider member 60, the first gear portion 51 reciprocates within the range of the angle θ. The guide member 61 is fixed to, for example, the upper mold base 102 by support members 62 and 63.

  By rotating the height adjustment base 32 around the axis Z (vertical axis) by the actuator 53, the height adjustment base 32 is adjusted according to the amount of rotation, that is, the amount of screwing of the male screw portion 32a relative to the female screw portion 31a. , That is, the height of the upper upset mold 34 relative to the upper mounting base 31 can be finely adjusted. The position of the descending end S2 (shown in FIG. 4) of the upper upsetting mold 34 is adjusted according to the height of the height adjusting table 32.

  The forging facility 100 (shown in FIG. 2) of the present embodiment includes sensors 120 and 121 that detect whether or not the workpiece W has been supplied to the stages ST1 to ST4, and a controller 122 that functions as a control unit. The sensors 120 and 121 are provided at least in the first stage ST1 and the third stage ST3.

  The controller 122 controls the actuator 53 of the height adjusting mechanism 50 based on the workpiece presence / absence signal output from the sensors 120 and 121. That is, in a state where the workpiece W is supplied to the first stage ST1 and the workpiece W is not supplied to the third stage ST3, the actuator 53 of the height adjustment mechanism 50 is moved to the first position P1 (shown in FIG. 3). By driving, the height adjusting table 32 is displaced to the first height (high position).

  Further, when the workpiece W is supplied to the first stage ST1 and the workpiece W is also supplied to the third stage ST3, the actuator 53 of the height adjusting mechanism 50 is moved to the second position P2 (shown in FIG. 3). To the second height (low position) lower than the high position (for example, about 0.5 mm lower).

Next, the operation of the forging facility 100 of this embodiment will be described.
As shown in FIGS. 5 (A) and 5 (B), the workpiece W is placed in the approximate center of the molding surface 25 of the lower upsetting mold 19. The position where the workpiece W is placed may be slightly shifted from the mold center C1 of the molds 19 and 34. After placing the workpiece W on the molding surface 25, the upper upsetting die 34 is lowered toward the lower upsetting die 19 by the press machine 104.

  As shown in FIGS. 6 (A) and 6 (B), when the upper upsetting die 34 is lowered, the workpiece W is crushed in the axial direction and deformed in the direction in which the outer diameter increases. At this time, the outer periphery of the workpiece W is not yet in contact with the inner peripheral surface 40 of the movable ring mold 22.

  When the upper upsetting die 34 is further lowered and the forming proceeds, as shown in FIGS. 7A and 7B, the work W is further flattened and the outer diameter is expanded, so that the outer circumference of the work W is increased. A part W <b> 1 abuts on the inner peripheral surface 40 of the movable ring mold 22. For this reason, molding proceeds while the movable ring die 22 is pushed and moved in the direction of the arrow F. That is, the movable ring mold 22 moves in the horizontal direction toward the forming center C2 of the workpiece W.

  When the upper upsetting die 34 is further lowered, as shown in FIGS. 8A and 8B, the portion W2 opposite to the portion W1 of the workpiece W that has been in contact with the movable ring die 22 so far is movable. By abutting on the inner peripheral surface 40 of the expression ring mold 22, the movement of the movable ring mold 22 in the direction of the arrow F is stopped. Since molding proceeds in this state, the workpiece W is filled inside the movable ring mold 22.

  Since the lower surface of the upper upsetting die 34 comes into contact with the upper surface of the movable ring die 22 while the upper upsetting die 34 reaches the descending end S2, the surplus wall of the workpiece W is prevented from protruding upward. For this reason, the upper surface shape of the workpiece W is flat. When the lower surface of the upper upsetting mold 34 comes into contact with the movable ring mold 22, the cushion mechanism 23 absorbs the downward displacement of the movable ring mold 22.

  As shown in FIGS. 9A and 9B, when the upsetting die 34 reaches the descending end S2, the molding is completed in a state where the entire outer periphery of the work W is constrained by the inner peripheral surface 40 of the movable ring die 22. To do. On the lower surface side of the workpiece W, since the surplus thickness of the workpiece W protrudes downward in the gap portion G, a convex portion W3 protruding downward is formed on the outer peripheral portion of the workpiece W.

  In the series described above, molding is completed at a position where the mold center C1 and the molding center C2 are shifted by ΔC. However, in some cases, the molding may be completed in a state where the mold center C1 and the molding center C2 are substantially coincident.

  The molded workpiece W is taken out by raising the knockout pin 17 after molding. The movable ring mold 22 of the present embodiment has an inner diameter on the upper side of the inner peripheral surface 40 that is larger than an inner diameter on the lower side, so that the workpiece W can be easily taken out from the movable ring mold 22.

  Since the movable ring mold 22 automatically moves toward the molding center C2 in accordance with the plastic flow of the workpiece W during the molding of the workpiece W, the mold apparatus 10 and the molds 19, 34 are arranged. There is little stress to give. That is, non-uniform deformation of the workpiece W due to factors such as defective shape (for example, oblique cutting) of the workpiece W that has been cut in advance in advance, uneven heating, fluctuations in molding resistance due to wear of the dies 19, 34, etc. is movable. Absorbed by the movement of the ring mold 22, it is possible to avoid the occurrence of excessive stress due to uneven load.

  For this reason, the occurrence of mold troubles is reduced and there is a secondary effect that the mold life is improved. In this forging die apparatus 10, the movable ring die 22 automatically moves toward the forming center C <b> 2 while the work W is being formed, so that the work W before forming is the die center of the lower upsetting die 19. Even if it is not accurately placed on C1, molding can be performed without any problem. For this reason, the work of placing the workpiece W on the lower upsetting mold 19 is easy.

  As described above, according to the forging die device 10 of the present embodiment, by using the movable ring die 22, a disk-shaped workpiece (intermediate product) W having a substantially uniform thickness and outer diameter is obtained. Can do. For this reason, shape defects such as lacking occur in the downstream process (second stage ST2 or third stage ST3), or processing defects such as black skin residue that cause problems when machining the outer surface of the workpiece W. Can be prevented.

  In the state where the first workpiece W is supplied to the first stage ST1 and the workpiece W is not supplied to the third stage ST3, just after the forging facility 100 starts to operate, the height adjustment stand 32 is a height adjustment mechanism. 50 is displaced to the high position side. In this state, molding is performed in the first stage ST1.

  In this case, since the workpiece W is formed only in the first stage ST1, the press load tends to be excessive. However, since the height adjustment base 32 is displaced to the high position, the upper upsetting die 34 is lowered. This can be avoided, and a product with a predetermined thickness can be obtained.

  The workpiece W formed in the first stage ST1 is sent to the second stage ST2 on the downstream side, and rough forming is performed by the mold apparatus 112 shown in FIG. The mold apparatus 112 includes a lower mold 131 having a first molding recess 130, an upper mold 133 having a second molding recess 132, a ring mold 134 for regulating the outer periphery of the workpiece W, and the like. Yes. The recesses 130 and 132 are formed over the entire circumference of the lower mold 131 and the upper mold 133. The second molding recess 132 is formed at a position corresponding to the first molding recess 130.

  The workpiece convex portion W3 is accommodated in the first molding recess 130, and when the upper mold 133 is lowered by the press 104, the workpiece is molded by the lower mold 131, the upper mold 133, and the ring mold 134.

  That is, when the upper mold 133 is lowered during pressing, a part of the workpiece flesh flows to the front extrusion side in the first molding recess 130, so that a shape corresponding to the recess 130 is formed. In the second forming recess 132, a part of the meat of the work flows to the rear extrusion side, so that it is formed into a shape corresponding to the recess 132. In this way, a workpiece (product) W having a shape as shown in FIG. 11 is obtained.

  The workpiece (intermediate product) W supplied to the mold apparatus 112 has a convex portion W3 formed in advance on the front extrusion side where plastic flow is unlikely to occur, and the rear extrusion side on which plastic flow is likely to occur has a generally flat shape. ing. For this reason, when molding is performed by the mold apparatus 112 shown in FIG. 10, a part of the meat of the work can flow approximately evenly on the front extrusion side and the rear extrusion side in the recesses 130, 132. A good fiber flow (f) as shown in FIG.

  The workpiece (intermediate product) W formed in the second stage ST2 is sent to the third stage ST3, and a new workpiece (material) W is carried into the first stage ST1. In the third stage ST3, finish molding is performed by a mold apparatus (downstream mold apparatus) 115 for finish molding. At the same time, in the first stage ST1, the upsetting is performed by the mold apparatus 10.

  As described above, in a state where the workpiece W is supplied to the first stage ST1 and the workpiece W is also supplied to the third stage ST3, the workpiece W is simultaneously formed in both the first stage ST1 and the third stage ST3. Therefore, the press load is dispersed.

  For this reason, the height adjusting mechanism 32 is displaced in advance to a low position, for example, about 0.5 mm lower than the high position by the height adjusting mechanism 50. By lowering the height adjustment base 32 to the low position, the upper upsetting die 34 can be lowered to a predetermined lower end S2 (shown in FIG. 4) during pressing, and a product with a predetermined thickness can be obtained. Can do.

  Thus, according to the forging facility 100 of this embodiment, regardless of the presence or absence of the workpiece W in the third stage ST3 on the downstream side, the workpiece W having a constant thickness can be obtained in the mold apparatus 10 of the first stage ST1. Can be molded.

  In carrying out the present invention, in addition to the above-described embodiments, there are specific configurations such as a lower upright type, an upper mounting base, a height adjusting base, a height adjusting mechanism, an upper upright type, a movable ring type, and the like. It goes without saying that the components of the present invention including the shape can be appropriately modified without departing from the gist of the invention.

The longitudinal section of the die device for forging of one embodiment of the present invention. FIG. 2 is a perspective view of a forging facility having the mold apparatus shown in FIG. 1. The bottom view which looked at the height adjustment mechanism of the metal mold | die apparatus shown by FIG. 1 from the downward direction. The longitudinal cross-sectional view of the state which the upper mold unit of the metal mold | die apparatus shown by FIG. 1 fell. (A) is sectional drawing which shows the state before an upper upset type | mold falls, (B) is sectional drawing which follows the X1-X1 line | wire in (A). (A) is sectional drawing which shows the state in the middle of the upper upsetting type | mold descending, (B) is sectional drawing which follows the X2-X2 line | wire in (A). (A) is sectional drawing which shows the state which the upper upset type further descended, (B) is sectional drawing which follows the X3-X3 line | wire in (A). (A) is sectional drawing which shows a state immediately before an upper upset type | mold reaches a falling end, (B) is sectional drawing which follows the X4-X4 line | wire in (A). (A) is sectional drawing which shows the state which the upper upset type | mold reached the falling end, (B) is sectional drawing which follows the X5-X5 line | wire in (A). Sectional drawing which shows a part of metal mold | die apparatus for further shape | molding a workpiece | work. Sectional drawing which shows the fiber flow of the product shape | molded by the metal mold | die apparatus shown in FIG. Sectional drawing of the conventional die apparatus for free forging. Sectional drawing of the conventional die apparatus for die forging. Sectional drawing of the conventional die apparatus for intermediate forging.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Forging die apparatus 19 ... Lower upset type 22 ... Movable ring type 25 ... Molding surface 31 ... Upper mounting base 32 ... Height adjustment stand 34 ... Upper upset type 36 ... Molding surface 40 ... Inner peripheral surface 50 ... Height adjustment mechanism 51 ... First gear part 52 ... Second gear part 53 ... Actuator 100 ... Forging equipment W ... Workpiece

Claims (4)

A lower upset mold having a molding surface on which the workpiece is placed;
An upper mounting base having a female thread portion provided so as to be movable up and down with respect to the lower upset mold and extending in the vertical direction;
A height adjustment base that has a male screw part that is screwed into the female screw part, and is held by the upper mounting base by screwing the male screw part into the female screw part;
A height adjustment mechanism capable of changing the height of the height adjustment table relative to the upper mounting table by rotating the height adjustment table;
A molding surface fixed to the height adjustment table and facing the molding surface of the lower upsetting mold, and between the molding surface of the lower upsetting mold when lowered toward the lower upsetting mold An upsetting mold for forming the workpiece;
It is a movable ring type that is arranged in a horizontal posture with respect to the lower upsetting type and is movable in the horizontal direction, has a circular inner peripheral surface when viewed from above, and the workpiece is arranged on the inside thereof, While the work is being formed between the lower upsetting mold and the upper upsetting mold, a part of the work moves in the horizontal direction by contacting the inner peripheral surface, and the upper upsetting mold A movable ring mold in which molding is completed in a state where the outer periphery of the workpiece is constrained by the inner peripheral surface in a state of reaching the descending end;
A forging die apparatus characterized by comprising: A cushion mechanism that urges the movable ring mold upward, and allows the movable ring mold to move downward in a state where the lower surface of the upsetting mold is in contact with the upper surface of the movable ring mold; ,
A gap formed between the inner peripheral surface of the movable ring mold and the outer peripheral surface of the lower upset mold, and when the workpiece is molded, the surplus thickness of the outer peripheral portion of the workpiece is downward A gap that allows it to protrude, and
The forging die apparatus according to claim 1, wherein: The height adjustment mechanism includes a circular or arc-shaped first gear portion formed in a circumferential direction of the height adjustment table,
A second gear portion meshing with the first gear portion;
An actuator for rotating the height adjustment base via the first gear portion by driving the second gear portion;
The forging die device according to claim 1, wherein the forging die device is provided. A forging die device according to claim 1;
A downstream mold apparatus for further forming a workpiece formed by the forging mold apparatus;
A workpiece detection means for detecting whether or not the workpiece is supplied to the forging die device and detecting whether or not the workpiece is supplied to the downstream mold device;
Control means for controlling the height adjusting mechanism of the forging die device,
The control means includes
In a state where the workpiece is supplied to the forging die device and the workpiece is not supplied to the downstream die device, the height adjusting base is displaced to the first height by the height adjusting mechanism,
In a state where the workpiece is supplied to the forging die device and the workpiece is supplied to the downstream die device, the height adjusting table is moved to a height lower than the first height by the height adjusting mechanism. Forging equipment characterized by being displaced to a height of 2.

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