JP7337867B2 - Die set, cylindrical workpiece generator and transfer press machine - Google Patents

Description

The present disclosure relates to a die set that holds a blanking die and a blanking punch, a cylindrical workpiece forming apparatus that includes the die set to form a cylindrical workpiece from a blank, and a cylindrical workpiece that is drawn and ironed. It relates to a transfer press machine.

As a conventional die set of this type, a pair of pillars stand upright from a lower base that holds a punching die, an upper base that holds a punching punch is supported by the pair of pillars so as to be able to move up and down, and a pair of It is known that the sheet metal is fed horizontally over the die through between the stanchions of the die. Note that when the upper base is lowered, a part of the sheet metal is punched out as a blank material by a punch and a punch die (see Patent Document 1, for example).

Japanese Patent Application Laid-Open No. 2016-203212 (see FIG. 4)

Compactness is demanded for the conventional die set described above.

The invention of claim 1, which has been made to solve the above-mentioned problems, comprises a lower base for holding a punching die, and a sheet metal feed path for feeding a sheet metal onto the punching die from a first horizontal direction. and an upper base that holds a punch that punches a blank material from the sheet metal in cooperation with the punching die, and that is vertically supported by a pair of pillars rising from the lower base. a pair of pedestals provided on the lower base and opposed to each other across the sheet metal feeding path in a second horizontal direction intersecting the first horizontal direction; and a bridging member that is bridged over the pair of pedestals and supports the lower ends of the pair of pillars above the sheet metal feeding path.

In the die set according to claim 1, the pair of pillars supporting the upper base so as to be able to move up and down are supported by the bridging member provided on the lower base and arranged in the dead space above the sheet metal feeding path. The die set is more compact than the one in which a pair of struts are arranged on both sides of the sheet metal feed path.

1 is a front view of a transfer press according to a first embodiment of the present disclosure; FIG. Front cross-sectional view of cylindrical workpiece generator Front cross-sectional view of a cylindrical work generating device in which the punch is positioned at the bottom dead center Front cross-sectional view of a cylindrical workpiece generating device in which the drawing punch is positioned before the bottom dead center A cross-sectional side view of a cylindrical work generating device in which the punch is positioned at the top dead center Side cross-sectional view of a cylindrical workpiece generating device in which the drawing punch is positioned at the bottom dead center Perspective view of cylindrical work generating device The perspective view of the cylindrical work production|generation apparatus of 2nd Embodiment.

[First embodiment]
A transfer press machine 10 according to a first embodiment of the present disclosure will be described below with reference to FIGS. 1 to 7. FIG. As shown in FIG. 1, the transfer press machine 10 has a plurality of punches (see reference numerals 25 and 25X in FIG. 1) arranged in a horizontal row at the lower end of a ram 12 that is vertically supported by a support frame 11 . In the present embodiment, the direction in which the plurality of punches are arranged corresponds to the "second horizontal direction" according to the present disclosure, and the horizontal direction orthogonal to the direction in which the plurality of punches are arranged corresponds to the "first horizontal direction" according to the present disclosure. Equivalent to "direction". Hereinafter, the horizontal direction perpendicular to the direction in which the punches are arranged, i.e., the "first horizontal direction", is referred to as the "front-back direction H1", and the horizontal direction in which the punches are arranged, i.e., the "second horizontal direction". It will be referred to as "horizontal direction H2". The side of the transfer press 10 shown in FIG. 1 is called the "front side", and the opposite side is called the "rear side". The side is simply referred to as "left side".

As shown in FIG. 1, the transfer press machine 10 is provided with a cylindrical work generating device 30 at the left end thereof. As shown in FIG. 2, the cylindrical workpiece forming device 30 has a cylindrical punch 31, a drawing punch 35 passing through the inner side thereof, and a punching die 32 and a drawing die 36 corresponding thereto. Then, as shown in FIG. 3, a punch 31 cooperates with a punch die 32 to punch a blank material W2 from the sheet metal W1, and as shown in FIG. to form a cylindrical work W3. That is, the tubular workpiece W3 is produced from the sheet metal W1 by the tubular workpiece producing device 30. As shown in FIG.

As shown in FIG. 1, at the lower end of the ram 12, a plurality of punches lined up in a horizontal row with a punch 31 at the head are all alteration punches 25 except for the punch at the right end. A plurality of additional machining dies 26 corresponding to 25 are provided in support block 24 below ram 12 . Then, each additional punch 25 draws the cylindrical work W3 into a forming hole (not shown) of each additional die 26 and draws or irons. Further, the cylindrical work W3 drawn into each forming hole is pushed out above the forming hole while being sandwiched between the knockout pin and the additional punch 25 (not shown), and the cylindrical work W3 fitted to each additional punch 25 is pushed out. The work stripper (not shown) removes the work from the additional punch 25 . Then, the transfer device 18 transfers the cylindrical work W3 above each forming hole to above each forming hole on the right side. By repeating this operation, the cylindrical work W3 is additionally machined a plurality of times by a plurality of additional machining punches 25 and additional machining dies 26 . The punch at the right end of the ram 12 is a scraping punch 25X, which shakes off the cylindrical work W3 conveyed by the transfer device 18 to a discharge path (not shown). The tubular work W3 that has fallen into the discharge path is recovered in a recovery box (not shown).

As shown in FIG. 5, the transfer device 18 has a plurality of pairs of fingers 20 (only one pair of fingers 20 is shown in FIG. 5) facing each other in the front-rear direction H1, and one pair extending in the lateral direction H2. The fingers 20 are supported by a support rail 19 so that they can be approached and separated from each other, and a coil spring (not shown) urges the fingers 20 toward each other. Then, the plurality of pairs of fingers 20 grip the cylindrical workpiece W3, move from each additional machining die 26 to the adjacent additional machining die 26 on the right side, and deliver it to the additional machining punch 25, thereby forming a cylindrical workpiece W3. A work W3 is intermittently conveyed to the right in the horizontal direction H2.

A so-called dummy stage having no punch and die is provided between the punch 31 and the leftmost additional punch 25, and the cylindrical workpiece W3 transferred to the dummy stage by the transfer device 18 is not shown. The knockout pin and the lower surface of the lower base main body 42, which will be described later, are sandwiched from above and below to be temporarily held.

The ram 12, transfer device 18, multiple knockout pins, and multiple work strippers are driven by the same drive source. Specifically, as shown in FIG. 1, an upper shaft 13 and a lower shaft 17 extending in the horizontal direction H2 are rotatably supported by the upper portion and the lower portion of the support frame 11, respectively. A side shaft 14 extending in the vertical direction is rotatably supported in the . The bevel gear 14G at the upper end of the side shaft 14 and the bevel gear 14G at one end of the upper shaft 13 are gear-connected, and the lower end of the side shaft 14 and one end of the lower shaft 17 are connected to a gear box. The upper shaft 13, the side shaft 14 and the lower shaft 17 are rotatably driven by a common driving source by being connected by gears (not shown) incorporated in 17G.

The ram 12 receives power from a pair of cams 13A rotating integrally with the upper shaft 13 to move up and down, and multiple knockout pins receive power from a plurality of cams (not shown) rotating together with the lower shaft 17 to move up and down. do. Also, the plurality of work strippers are moved up and down by receiving power from a plurality of cams (not shown) of the lower shaft 17 through a link mechanism (not shown) arranged behind the support block 24 . Furthermore, a cam 14A is also provided at the intermediate portion of the side shaft 14 so as to be capable of rotating integrally therewith. A cam 14A is accommodated between a pair of connecting bars (not shown) extending between one end of the pair of support rails 19 and between positions close to one end of the pair of support rails 19, thereby raising and lowering the ram 12. A pair of support rails 19 reciprocate in the horizontal direction H2 in synchronization with the operation.

As shown in FIG. 5, the cylindrical work producing device 30 includes the above-described punching punch 31 and punching die 32 fixed to a die set 90 . The die set 90 includes a lower base 41 that holds the punching die 32 and an upper base 91 that is vertically supported by a pair of pillars 89 standing from the lower base 41 and holds the punching punch 31 . Then, the upper base 91 moves up and down while being two-dimensionally positioned within a horizontal two-dimensional plane by a pair of struts 89 . As a result, the machining accuracy of the punch 31 and the punch die 32 is improved.

More specifically, when the transfer press 10 is continuously operated, the relative position of the ram 12 and the support block 24 in the horizontal direction changes over time due to thermal deformation of each part, and the processing that the additional punches 25 receive may change over time. The ram 12 may tilt left or right due to the resistance, causing misalignment between the punch 31 and the punch die 32 . On the other hand, in the transfer press machine 10 of the present embodiment, the punch 31 and the punch die 32 are supported by the die set 90, thereby suppressing their misalignment and improving the processing accuracy. In addition, since the aforementioned drawing punch 35 passes through the central portion of the punching punch 31 supported by the die set 90 and the corresponding drawing die 36 is fixed to the lower base 41, the drawing punch 35 and the drawing die The misalignment of 36 is also suppressed, and their processing accuracy is improved.

The structure of the die set 90 together with the punch 31, the punch die 32, the drawing punch 35, and the drawing die 36 will be described in detail below. As shown in FIG. 7, the lower base 41 of the die set 90 includes a lower base main body 42 and a column support 43 fixed over the lower base main body 42 . The entire lower base body 42 has, for example, a substantially rectangular parallelepiped shape (substantially block shape) that is elongated in the front-rear direction H1 and flattened in the vertical direction. A die receiving hole 46 shown in FIG. 2 penetrates vertically through the centroid portion of the planar shape of the lower base body 42 .

As shown in the figure, the diameter of the die receiving hole 46 is reduced in a stepped manner from top to bottom. It has a two-step surface 46D and a small diameter portion 46E. The drawing die 36 has a disk-like shape and has a drawing hole 36A having a smaller diameter than the small diameter portion 46E of the die receiving hole 46 at the center. The drawing die 36 is overlapped with the second stepped surface 46</b>D of the die accommodating hole 46 and fitted into the intermediate diameter portion 46</b>C, and is fixed by the punching die 32 . In addition, the upper surface of the drawing die 36 is arranged flush with the first step surface 46B of the die receiving hole 46 .

The punching die 32 has a shape in which the entire upper surface of a circular plate protrudes in the shape of a truncated cone, and has a punching hole 32A having a larger diameter than the throttle hole 36A in the center. The punching die 32 is fitted into the large-diameter portion 46A of the die accommodating hole 46, and overlapped with the first stepped surface 46B and the upper surface of the drawing die 36 which is flush with the first stepped surface 46B. It is fixed to the body 42 . The entire truncated conical upper surface of the punching die 32 protrudes from the center of the upper surface of the lower base body 42 to form an annular protrusion 32T. The punching die 32 is fixed by a bolt, and is received in a counterbore (not shown) so that the bolt does not protrude from the upper surface of the punching die 32 .

A corner portion between the horizontal upper surface of the annular projection 32T and the inner surface of the punched hole 32A forms an edge portion 32L perpendicular to the pin angle. On the other hand, the corner between the horizontal upper surface of the drawing die 36 and the inner surface of the drawing hole 36A is chamfered in an arc shape to form a chamfered surface 36C.

As shown in FIG. 5, the lower base body 42 has a pair of recesses 47 facing each other in the front-rear direction H1 and opening to the inner surface of the small-diameter portion 46E of the die receiving hole 46. As shown in FIG. A pair of work strippers 48 are accommodated in the pair of recesses 47 and are biased toward each other.

Further, the lower base main body 42 is supported by pedestal portions 24</b>K projecting from the upper surface of the support block 24 at both ends in the front-rear direction H<b>1 . It is fixed to the pedestal portion 24K by bolts B1 and positioned by a positioning block 42B. As a result, the entire lower base body 42 is held floating from the upper surface of the support block 24 . The transfer device 18 described above penetrates between the lower base body 42 and the support block 24 . 2 to 4, the work stripper 48 and the transfer device 18 are omitted.

As shown in FIG. 7, the upper surface of the lower base body 42 is formed with a pair of recessed portions 49A by recessing the entire edges on both sides in the horizontal direction H2 in a stepped manner. The upper projection 49B is formed between . On the other hand, the column support 43 includes, for example, a block-shaped bridging member 43A having substantially the same planar shape as the lower base body 42, and a stepped shape extending from the entire edge portions on both sides of the lower surface of the bridging member 43A in the horizontal direction H2. A pair of pedestals 43B protruded outward, and a lower surface groove 43M is formed between the pair of pedestals 43B. In other words, the column support 43 has a structure in which a bridging member 43A is bridged between a pair of pedestals 43B. Then, the upper surface protrusions 49B of the lower base body 42 are fitted into the lower surface grooves 43M of the column support member 43, and the pair of pedestals 43B are accommodated in the pair of depressions 49A by the positioning block 41B. Fixed. As shown in FIG. 2, the bridging member 43A is located above the annular protrusion 32T, and a sheet metal W1 is placed between the bridging member 43A and the lower base body 42 from one side in the front-rear direction H1. A sheet metal feeding path 41S for feeding is formed.

In the present embodiment, the sheet metal feeding path 41S is a space surrounded on all four sides by walls (a pair of pedestals 43B, a bridging member 43A, and an upper projection 49B), but any path through which the sheet metal W1 passes may be used. For example, the sheet metal feed path may not be surrounded by walls or sandwiched between walls.

As shown in FIGS. 2 and 7, the bridging member 43A is formed with a punch passage hole 43W having a square cross section coaxially with the punch hole 32A. The punch passing hole 43W has a stepped large diameter portion 43V at its lower end, into which a disk-shaped contact member 45 is fitted. A punch passage hole 45W having a circular cross section is formed in the central portion of the contact member 45 coaxially with the punch hole 32A. The inner diameter of the punch passing hole 45W of the contact member 45 is the same as or slightly larger than the inner diameter of the punching hole 32A of the punching die 32 . Further, the upper portion of the punch passage hole 45W of the contact member 45 has a tapered shape in which the diameter gradually decreases from the upper end of the contact member 45 in the vertical direction to the intermediate position.

As shown in FIG. 5, a pair of support holes 43X for supporting the aforementioned pair of struts 89 are formed at both ends of the bridging member 43A in the front-rear direction H1. The pair of support holes 43X are arranged at symmetrical positions with respect to the bridging member 43A in the front-rear direction H1. It has become.

On the other hand, each post 89 has a circular cross-section extending in the vertical direction and includes a post body 89A with a flange 89F protruding from the position near the lower end, and a retaining part 88 with a flange 88F protruding from the lower end of the cylindrical body. Become. A through hole 88A having a counterbore 88Z at the lower end is formed in the central portion of the retainer part 88, and a screw hole 89N is formed in the central portion of the lower end of the column main body 89A. Then, the column main body 89A is inserted into the support hole 43X from above, the flange 89F is attached to the upper surface of the bridging member 43A, and the retaining part 88 is inserted into the support hole 43X from below, so that the flange 88F is attached. It is accommodated in the large diameter portion 43Y of the support hole 43X. A bolt passed through the through hole 88A of the retaining part 88 is tightened to the screw hole 89N of the post 89, thereby fixing the post 89 to the bridging member 43A.

As shown in FIG. 7, the upper base 91 has a rectangular parallelepiped shape that is flat in the vertical direction and elongated in the front-rear direction H1. The length of the upper base 91 in the front-rear direction H1 is substantially the same as that of the bridging member 43A, and the width in the lateral direction H2 is narrower than that of the bridging member 43A. A pair of through holes 91A pass through both ends of the upper base 91 in the longitudinal direction, and a pair of struts 89 pass through the inside of a pair of sliding sleeves 92 press-fitted into the pair of through holes 91A. are doing. As shown in FIG. 5, the pair of sliding sleeves 92 are made of sliding metal, for example, and have their lower end surfaces flush with the upper base 91 and protrude upward from the upper base 91 .

As shown in FIGS. 5 and 7, a through-hole 91B having a square cross section is formed coaxially with the punched hole 32A in the upper base 91, and a rectangular punch accommodating sleeve 91K hangs down from the opening edge of the through-hole 91B. It is A rectangular upper surface recess 91D extending in the longitudinal direction is formed on the upper surface of the upper base 91, and a through hole 91B is opened in the center of the lower surface of the upper surface recess 91D.

A punch holder 93 is inserted into the through hole 91B. The punch holder 93 has a structure in which an oval flange 93F is provided at the upper end of a rectangular tubular portion 93A. The upper end of the rectangular tubular portion 93A is closed by an upper end wall 93J whose upper surface is flush with the flange 93F, and an insertion hole 93B having a circular cross section is formed in the center thereof.

The punch holder 93 is inserted into the through-hole 91B from above with the punch 31 attached to the rectangular tubular portion 93A. The flange 93F is received with a gap between the inner side surfaces of the upper concave portion 91D facing each other in the horizontal direction H2, and is fixed to the upper base 91 by bolts passing through both ends in the longitudinal direction of the flange 93F. The top surface of the punch holder 93 and the top surface of the upper base 91 are flush with each other, and the tip surface 93S of the punch holder 93 is flush with the tip surface of the punch housing sleeve 91K.

As shown in FIG. 2, the punch 31 has a cylindrical shape, and the outer peripheral surface thereof is provided with a small diameter portion 31B above the intermediate position in the axial direction and a large diameter portion 31A below. The small-diameter portion 31B is fitted into the punch holder 93 from below, and the step surface between the small-diameter portion 31B and the large-diameter portion 31A abuts against the tip surface 93S of the punch holder 93. As shown in FIG. Further, as shown in FIG. 3, a screw hole 31N is formed in a part of the small diameter portion 31B in the circumferential direction. A set screw 31M is screwed into a screw hole 31N through a through hole 93K formed in the punch holder 93 so that the punch 31 is retained in the punch holder 93. As shown in FIG.

As shown in FIG. 2, the drawing punch 35 has a structure in which a flat columnar punch body portion 35B having a larger outer diameter is fixed to the lower end of a shaft portion 35A having a circular cross section. The corners where the lower surface and the side surfaces of the punch main body 35B intersect are chamfered in an arc shape.

The inside of the punch 31 has an inner large-diameter portion 31C on the lower side than the intermediate position in the axial direction corresponding to the drawing punch 35, and an inner small-diameter portion 31D on the upper side. The inner small diameter portion 31D is slightly smaller than the insertion hole 93B of the punch holder 93. As shown in FIG. The punch body portion 35B of the drawing punch 35 is loosely fitted in the inner large diameter portion 31C, and the shaft portion 35A of the drawing punch 35 is fitted in the inner small diameter portion 31D so that the drawing punch 35 is attached to the punching die 32. It is centered.

The upper base 91 is connected to the ram 12 in a state allowing slight horizontal movement and slight tilting. For its connection, the ram 12 is provided with a connection bolt 95 shown in FIG. The coupling bolt 95 has a tubular shape, and has a male screw portion 95N on the outer surface above the middle portion in the vertical direction. A male screw portion 95N is screwed into a screw hole 96N penetrating vertically through the ram 12, and the connecting bolt 95 is attached to the ram 12 so that the position thereof can be adjusted vertically. The inside of the connecting bolt 95 has an inner diameter equal to or larger than that of the insertion hole 93B of the punch holder 93 . A portion of the ram 12 having the screw hole 96N is a reinforcing sleeve 96 made of a material having higher hardness than the entire ram 12, and the reinforcing sleeve 96 is fixed in the pilot hole 96A of the ram 12. there is

An annular groove 95M is formed near the lower end of the connecting bolt 95, and the entire portion below the annular groove 95M forms a disk-shaped flange 95F. A pair of connecting members 94 are attached to the lower ends of the connecting bolts 95 . As shown in FIG. 7, the coupling member 94 has a U-shaped groove that opens to one side surface of a rectangular parallelepiped, and the upper end of the opening edge of the U-shaped groove protrudes inward in a stepped manner with respect to the lower end. and has an engaging protrusion 94T at its upper end. The engaging projection 94T of the connecting member 94 is received in the annular groove 95M of the connecting bolt 95, and the flange 95F of the connecting bolt 95 is received in the large diameter portion 94D of the connecting member 94 below the engaging projection 94T. In this state, the connecting member 94 is fixed to the upper surface of the punch holder 93 with bolts.

Thereby, the upper base 91 is connected so as to move up and down together with the ram 12 . The clearance between the connecting member 94 and the lower end of the connecting bolt 95 and the clearance between the shaft portion 35A of the drawing punch 35 and the inner surface of the connecting bolt 95 and the inner surface of the insertion hole 93B allow the upper base 91 to , a slight horizontal movement in any direction and a slight tilting motion in any direction with respect to the ram 12 is allowed. In other words, the die set 90 is mounted between the ram 12 and the support block 24 of the transfer press 10 with slight positional deviation and tilting between the ram 12 and the support block 24 allowed.

A shaft portion 35A of the drawing punch 35 penetrates the inner side of the connecting bolt 95, extends above the connecting bolt 95, and is connected to the lever 16 shown in FIG. Specifically, the lever 16 has a seesaw shape, and one end of the lever 16 is hinged to the upper end of the drawing punch 35 (specifically, the shaft portion 35A) so as to be movable in the longitudinal direction H1 and the lateral direction H2. It is The other end of the lever 16 is provided with a cam follower (not shown) projecting in the direction of the rotation shaft. The cam follower is engaged with a cam groove 15A on the outer peripheral surface of a cylindrical body 15 that rotates integrally with the side shaft 14. As shown in FIG. As a result, the drawing punch 35 moves up and down in synchronism with the ram 12 .

Note that the punch punch 31 and the drawing punch 35 of the present embodiment both have a circular plane cross-section, but have an elliptical or oval shape, and the cylindrical work generating device 30 produces an elliptical or oval cylindrical work. may be generated. Further, the drawing punch 35 may be configured to operate by receiving power from a power source different from the ram 12 .

The above is the description of the configuration of the transfer press machine 10 of the present embodiment. Next, the operation of this transfer press machine 10 will be described. When the transfer press machine 10 is started, the blanking punch 31 and the drawing punch 35 of the cylindrical work producing device 30 are raised and lowered together with the ram 12 . As shown in FIG. 2, when the punch 31 and the drawing punch 35 are separated upward from the bridging member 43A of the lower base 41, the sheet metal W1 passed through the sheet metal feeding path 41S is punched. It is fed over the die 32 punched holes 32A. Then, the punch 31 descends while receiving the lower end of the drawing punch 35 inside, passes through the punch passing holes 43W and 45W of the bridging member 43A and the contact member 45, and enters the punching hole 32A. As shown in FIG. 3, a portion of the sheet metal W1 is punched out as a blank material W2. When the lower surface of the punch 31 is adjacent to the upper surface of the drawing die 36, the bottom dead center is reached. As a result, the outer edge of the blank material W2 is sandwiched between the lower surface of the punch 31 and the upper surface of the drawing die 36 . In this state, the drawing punch 35 descends from the punch 31 to draw the blank W2 into the drawing hole 36A, forming a cylindrical work W3 as shown in FIG.

Thereafter, as shown in FIG. 6, the drawing punch 35 is lowered together with the cylindrical work W3 to below the lower base body 42, passes between a pair of work strippers 48, It reaches the bottom dead center when it enters between the pair of fingers 20 of . Then, when the drawing punch 35 rises, the cylindrical work W3 is separated from the drawing punch 35 by the pair of work strippers 48 . Also, the punch 31 rises before the drawing punch 35 , and at that time, the sheet metal W<b>1 outside the punch 31 comes into contact with the contact member 45 and is separated from the punch 31 .

As described above, the cylindrical work W3 is generated by the cylindrical work generating device 30 and transferred to the pair of fingers 20 of the transfer device 18 . Then, through the above-described dummy stage, it is sequentially conveyed onto a plurality of additional machining dies 26, and additionally machined by a plurality of additional machining punches 25 and additional machining dies 26 as described above.

By the way, when the transfer press machine 10 is continuously operated, the ram 12 and the support block 24 may be slightly inclined or slightly displaced in the horizontal direction due to thermal deformation or the like. However, in the transfer press machine 10 of the present embodiment, the punching punch 31, the drawing punch 35, the punching die 32, and the drawing die 36 of the cylindrical work generating device 30 are arranged on the upper base 91 and the lower base of the die set 90. 41 and the die set 90 is connected to the ram 12 in such a way that slight tilts and misalignments between the ram 12 and the support block 24 can be accommodated. Since the upper base 91 and the lower base 41 move up and down while being two-dimensionally positioned by the pair of columns 89, the punching punch 31 and the drawing punch 35, and the punching die 32 and the drawing die 36 move up and down. is stable, and the cylindrical work generating device 30 can generate the cylindrical work W3 with high machining accuracy.

By having the die set 90 in this manner, the cylindrical work generating apparatus 30 can generate the cylindrical work W3 with higher processing accuracy than when not having the die set 90 . By the way, if the die set 90 is a conventional die set, a pair of pillars will stand up from both sides of the sheet metal feed path 41S, and the die set will be bulky and the installation space of the die set will be limited. In order to secure it, the size of the cylindrical work generating device and the transfer press machine is increased.

However, in the die set 90 of the present embodiment, as shown in FIG. 7, the pair of struts 89 are supported by the bridging member 43A provided on the lower base 41 and arranged in the dead space above the sheet metal feeding path 41S. Therefore, the die set 90 can be made more compact than a conventional one in which a pair of support columns are arranged on both sides of the sheet metal feeding path 41S. As a result, as shown in FIG. 1, the cylindrical work generating device 30 having the die set 90 is also compact, and the transfer press machine 10 having the cylindrical work generating device 30 is also compact. Moreover, the width of the sheet metal feeding path 41S can be increased by the amount corresponding to the absence of the pair of struts 89 on both sides of the sheet metal feeding path 41S. Furthermore, in the die set 90 of the present embodiment, the bridging member 43A is thickened up to the position where the punch accommodating sleeve 91K is received in the punch passing hole 43W of the bridging member 43A. Become. In addition, since the contact member 45 attached to the lower surface of the bridging member 43A is configured to contact the sheet metal W1 of the sheet metal feed path 41S, the contact member 45 is replaced with a contact member 45 having a different thickness to contact the sheet metal W1. By adjusting the gap with the contact member 45, the sheet metal W1 can be fed smoothly.

[Second embodiment]
As shown in FIG. 8, a die set 90V of a cylindrical work generating apparatus 30V of the present embodiment has a pair of pillars formed by cutting out the longitudinal intermediate portion of the pillar support 43 described in the first embodiment. A support 43K is provided. The bridging members 43A of the pair of column support bodies 43K are arranged at two locations across the punch 31 in the front-rear direction H1, and the pair of columns 89 are erected therefrom. Even with such a structure, the same effects as those of the first embodiment can be obtained.

[Other embodiments]
(1) The cylindrical work generating device 30 of the above embodiment was included in the transfer press machine 10, but the above configuration may be applied to a single cylindrical work generating device that is not included in the transfer press machine. .

(2) Alternatively, the above structure may simply be applied to a die set of a press for producing blanks. Specifically, the cylindrical work generating apparatus 30 shown in FIG. 5 may be configured so as not to perform drawing. In this case, the work is not a cylindrical work, but a plate-like blank material W2 punched out from the sheet metal W1.

(3) Although the die set 90 of the first embodiment has two pillars 89, the third and fourth pillars 89 are erected from the bridging member 43A to form three or more pillars 89. , the upper base 91 may be supported.

(4) In the die set 90 of the first embodiment, the entire support 89 is arranged above the sheet metal feeding path 41S, but even a part of the support 89 is arranged above the sheet metal feeding path 41S. If so, the remaining part may be arranged outside above the sheet metal feeding path 41S.

(5) The pair of struts 89 in the first embodiment are arranged opposite to each other across the punch 31 in the front-rear direction H1. , may be aligned in any direction. Therefore, for example, the pair of struts 89 may be arranged to face each other across the punch 31 in the horizontal direction H2. However, since the sheet metal feeding path 41S extends in the front-rear direction H1 (first horizontal direction), which is the feeding direction of the sheet metal W1, the pair of pillars 89 and the punch 31 are provided as in the above-described embodiment. are aligned in the front-rear direction H1, the degree of freedom in arranging the pair of struts 89 increases.

Although specific examples of the technology included in the scope of claims are disclosed in the specification and drawings, the technology described in the scope of claims is not limited to these specific examples. Various modifications and changes of the examples are included, and a part of specific examples is also included.

REFERENCE SIGNS LIST 10 transfer press 11 support frame 12 ram 24 support block 24K pedestal 30, 30V cylindrical workpiece generator 31 blanking punch 32 blanking die 35 drawing punch 36 drawing die 41 lower base 41S sheet metal supply path 43A bridging member 43B stand 43W , 45W punch passing hole 45 abutment member 45W punch passing hole 89 strut 90, 90V die set 91 upper base 91K punch accommodating sleeve H1 front-back direction (first horizontal direction)
H2 lateral direction (second horizontal direction)
W1 Sheet metal W2 Blank material W3 Cylindrical work

Claims (7)

a lower base holding a punching die;
a sheet metal feed path for feeding sheet metal onto the stamping die from a first horizontal direction;
an upper base that holds a punch that cooperates with the punch die to punch a blank material from the sheet metal, and that is vertically supported by a pair of pillars rising from the lower base. hand,
a pair of pedestals provided on the lower base and opposed to each other across the sheet metal feed path in a second horizontal direction intersecting the first horizontal direction;
a bridging member provided on the lower base and bridging over the pair of pedestals to support the lower ends of the pair of pillars above the sheet metal feeding path. 2. The die set according to claim 1, wherein said pair of pillars face each other across said punch in said first horizontal direction. 3. The die set according to claim 1, wherein the bridging member has a block shape covering the punching die from above, and has a punch passing hole concentric with the punching hole and through which the punch passes. Claim 3, further comprising a contact member attached to the bottom surface of the bridging member, protruding from the bottom surface of the bridging member, facing the sheet metal from above, and having a punch passage hole through which the punch passes. Die set as described. a punch housing sleeve projecting downward from the upper base and housing the upper end of the punch;
5. A die set according to claim 4, wherein said punch passage hole of said bridging member is wider than said punch passage hole of said abutment member, and said punch accommodating sleeve advances and retreats only through said punch passage hole of said bridging member. A die set according to any one of claims 1 to 5;
the cylindrical punch supported by the upper base;
a drawing punch that passes through the inside of the punch and moves linearly up and down;
the punching die supported by the lower base and having a punching hole through which the punch advances and retreats;
a drawing die that is superimposed under the punching die and supported by the lower base and has a drawing hole that is smaller than the punching hole and through which the lower end of the drawing punch passes;
A cylindrical work forming apparatus for forming a cylindrical work by drawing the blank into the drawn hole with the drawn punch while pressing the blank against the opening edge of the drawn hole with the punch. a cylindrical workpiece generating device according to claim 6;
a ram that supports a plurality of punches arranged in the second horizontal direction with the punch at the head;
a support block containing a plurality of dies corresponding to the plurality of punches;
a pedestal portion that protrudes from the upper surface of the support block and faces in the first horizontal direction and supports the lower base in a state of being lifted from the upper surface of the support block;
and a transfer device for intermittently transferring the workpiece, which has been hit down to the upper surface of the support bed by the drawing punch, to the plurality of punches.

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