WO2010064641A1 - 鍛造加工方法 - Google Patents
鍛造加工方法 Download PDFInfo
- Publication number
- WO2010064641A1 WO2010064641A1 PCT/JP2009/070214 JP2009070214W WO2010064641A1 WO 2010064641 A1 WO2010064641 A1 WO 2010064641A1 JP 2009070214 W JP2009070214 W JP 2009070214W WO 2010064641 A1 WO2010064641 A1 WO 2010064641A1
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- WIPO (PCT)
- Prior art keywords
- workpiece
- pair
- molded product
- forging
- claws
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
- B21K27/02—Feeding devices for rods, wire, or strips
- B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B13/00—Methods of pressing not special to the use of presses of any one of the preceding main groups
Definitions
- the present invention relates to a forging method and related technology for forging a workpiece to be transferred.
- a multi-stage forging apparatus that forms a workpiece by a plurality of continuous forging processes is well known.
- a conventional multistage forging apparatus performs, for example, a primary molding die for performing primary molding on a workpiece and secondary molding for a primary molded workpiece, as shown in Patent Documents 1 and 2 below, for example. And a transfer device for transferring the workpiece from the primary molding die to the secondary molding die.
- the transfer device usually includes a pair of feed bars arranged in parallel on both sides of the transport line, and a pair of claws provided to face each other inside the pair of feed bars. Then, by closing the pair of feed bars, for example, the workpiece (primary molded product) formed in the primary molding die is clamped (chucked) by the pair of claws, and in this state, the feed bar moves to the transport line. The workpiece is arranged at a position corresponding to the secondary molding die. Thereafter, the pair of feed bars are opened and the workpiece chuck is released, so that the workpiece is set in the secondary molding die.
- the primary molded product by the primary molding has a shape having a volume balance that is calculated in advance so that no defects are generated in the secondary molding. For this reason, when the primary molded product is set in the secondary molding die, if the position of the primary molded product is shifted, the secondary molding cannot be performed with accuracy, and a lack of detail or a lack of meat. There is a problem that defects such as entanglement (molding defects) occur.
- This invention has been made in view of the above problems, and when transferring a work from an upstream work processing unit such as a primary molding die to a downstream work processing unit such as a secondary molding die, It is an object of the present invention to provide a forging method and related technology capable of preventing the position of a workpiece from shifting and performing forging with high accuracy.
- the present invention has the following configuration.
- One of the engaging portion and the engaged portion is configured by a positioning convex portion, and the remaining one is configured by a positioning concave portion that is positioned by fitting the positioning convex portion.
- a work discharge section is provided on the downstream side along the conveyance line of the work processing section, and a plurality of the pair of claws are provided on the pair of feed bars.
- the pair of feed bars By closing the pair of feed bars, the workpieces of the workpiece loading unit and the workpiece processing unit are respectively clamped by the corresponding pairs of claws, and the pair of feed bars are advanced and opened in the clamped state. 3.
- the forging method according to item 1 or 2 wherein the workpieces sandwiched between the pairs of claws are transferred to the workpiece processing unit and the workpiece discharge unit, respectively.
- the work processing unit includes a plurality of work processing units arranged along a transfer line, By closing the pair of feed bars, the workpiece loading unit and the workpieces of the plurality of cake processing units are respectively clamped by the corresponding pairs of claws, and the pair of feed bars are advanced in the sandwiched state.
- the forging method according to the preceding item 3 wherein the workpieces sandwiched between the claws of each set are transferred to the plurality of workpiece processing units and the workpiece discharge unit, respectively, by opening from the above.
- the work processing unit includes a first work processing unit and a second work processing unit disposed on the downstream side of the first work processing unit,
- the first workpiece processing unit is configured as a primary molding unit that performs primary molding by die forging on a workpiece to obtain a primary molded product, 5.
- the engaging portion formed in the primary molded product as the workpiece is constituted by a positioning convex portion, 7.
- the engaging portion formed in the primary molded product as the workpiece is constituted by a positioning convex portion, 7.
- a workpiece discharge unit is provided on the downstream side along the transfer line of the workpiece processing unit,
- the work processing unit includes a first work processing unit and a second work processing unit arranged on the downstream side of the first work processing unit,
- the pair of feed bars are closed, the workpiece loading unit and the workpieces of the first and second workpiece processing units are respectively clamped by the corresponding sets of claws, and the pair of feed bars are advanced in the clamped state.
- the workpieces sandwiched between the claws of each set are configured to be transferred to the first and second workpiece processing units and the workpiece discharge unit, respectively.
- a primary molding die for performing primary molding on the workpiece to obtain a primary molded product is provided in the first workpiece processing unit, 15.
- the forging device according to item 14 wherein a secondary molding die for performing secondary molding on the primary molded product to obtain a secondary molded product is provided in the second work processing unit.
- the engaging part provided on the work is engaged with the engaged part provided on the claw to position the work. Therefore, the position shift of the workpiece can be prevented and forging can be performed with high accuracy.
- the workpiece can be positioned reliably.
- a plurality of workpieces can be transferred sequentially in parallel, and the production efficiency can be improved.
- the workpiece can be processed with respect to the workpiece by a plurality of workpiece processing units.
- the workpiece can be formed in two stages of primary forming and secondary forming, and a forged product having a complicated shape can be obtained.
- the productivity is improved as compared with the case where the step of forming the engaging portion is performed separately. be able to.
- the volume balance in the forged product can be easily adjusted.
- the productivity can be further improved as compared with the case where the engaging protrusion is pushed separately.
- the volume balance in the forged product can be easily adjusted.
- a piston material can be manufactured as a forged product.
- the primary molded product as the workpiece can be transferred in a stable state while reliably positioning.
- the positioning convex portion can be reliably fitted by the positioning concave portion, so that the workpiece can be positioned more reliably.
- the forging device of the invention similarly to the above, when the workpiece is sandwiched between the pair of claws, the engaging portion provided on the workpiece is engaged with the engaged portion provided on the nail, Since the workpiece is positioned, the displacement of the workpiece can be prevented, and forging can be performed with high positional accuracy.
- the engagement portion provided on the workpiece is engaged with the engaged portion provided on the claw. Since the workpiece is positioned, the displacement of the workpiece can be prevented and the workpiece can be transferred with high positional accuracy.
- the engagement portion provided on the workpiece is engaged with the engaged portion provided on the claw, as described above. Since the workpiece is positioned, the displacement of the workpiece can be prevented and the workpiece can be transferred with high positional accuracy.
- FIG. 1 is a plan view showing a forging apparatus to which a forging method according to an embodiment of the present invention can be applied.
- FIG. 2 is a side view showing the forging device of the embodiment. 3 is an enlarged plan view showing a second set of claw portions in the apparatus of FIG.
- FIG. 4 is a front view showing a piston material manufactured by the forging device of the embodiment.
- FIG. 5 is a perspective view showing a primary molded product manufactured by the forging device of the embodiment.
- 6A is a plan view showing the primary molded product of FIG. 6B is a front sectional view showing the primary molded product of FIG. 6C is a side sectional view showing the primary molded product of FIG.
- FIG. 6A is a plan view showing the primary molded product of
- FIG. 7 is a perspective view showing a forging material employed in the forging device of the embodiment.
- FIG. 8 is a front sectional view showing a primary molding die in the forging device of the embodiment.
- FIG. 9 is a front sectional view showing a secondary molding die in the forging device of the embodiment.
- FIG. 10A is a plan view showing a lower mold of the secondary molding mold of FIG.
- FIG. 10B is a front sectional view showing the lower mold of FIG. 10A.
- FIG. 10C is a side sectional view showing the lower mold of FIG. 10A.
- FIG. 11 is a partially enlarged front sectional view showing a state immediately before the primary molded product is put into the molding hole of the secondary molding die in the forging device of the embodiment.
- FIG. 11 is a partially enlarged front sectional view showing a state immediately before the primary molded product is put into the molding hole of the secondary molding die in the forging device of the embodiment.
- FIG. 12A is an enlarged plan view showing the periphery of a claw in a forging device to which a forging method as a modification of the present invention can be applied.
- 12B is an enlarged front view showing the vicinity of the nail of FIG. 12A.
- FIG. 13 is a perspective view showing a primary molded product manufactured by a forging device according to a modification.
- 14A is a plan view showing the primary molded product of FIG.
- FIG. 14B is a side view showing the primary molded product of FIG. 13.
- FIG. 14C is a front view showing the primary molded product of FIG.
- FIG. 15 is a front sectional view showing a primary molding die in a forging device according to a modification.
- FIG. 16 is a front sectional view showing a secondary molding die in a forging device according to a modification.
- FIG. 1 is a schematic plan view showing a multistage forging apparatus to which a forging method according to an embodiment of the present invention is applied
- FIG. 2 is a side view.
- this forging device can perform two types of die forging, primary forming and secondary forming, on the workpiece (W) sequentially transferred by the transfer device (4). ing.
- the forging apparatus includes a work carry-in part (50), primary and secondary forming parts (51) and (52), and a work discharge part from the upstream side (left side in the figure) to the downstream side (right side) along the transfer line. (53) are sequentially provided in this order.
- the forging apparatus, the members constituting the molds 1 and 2 and the like, the workpiece W, etc., which will be described in detail below, are on the left side from the right side (work discharge side, downstream side) in FIGS.
- the front is the case where the workpiece is seen (upstream side).
- the work carry-in section (50) is configured by a downstream end portion of a work carry-in means such as a carry-in conveyor (56). Then, the work (W) is carried into the inside from the outside of the apparatus by the carry-in conveyor (56), is conveyed to the conveyor end, that is, the work carry-in part (50), and waits.
- a work carry-in means such as a carry-in conveyor (56).
- the primary molding part (51) constitutes the first work processing part
- the secondary molding part (52) constitutes the second work processing part.
- the primary molding part (51) and the secondary molding part (52) are provided with a primary molding die (1) and a secondary molding die (2), respectively.
- primary molding such as rough molding is performed on the workpiece (W) by the primary molding die (1)
- the workpiece (W) is formed in the secondary molding section (52).
- Secondary molding such as main molding (finish molding) is performed by the secondary molding die (2).
- the work discharge unit (53) is configured by an upstream end of work carry-out means such as a carry-out conveyor (57). And the workpiece
- the forging apparatus is provided with a transfer device (4), and the transfer device (4) moves the workpiece (W) from the workpiece carry-in portion (50) to the primary molding portion (51) and the secondary molding portion. (52) and the workpiece discharge section (53) can be sequentially transferred.
- the workpiece (W) before the primary molding is referred to as a forging material (W0), and the workpiece (W) after the primary molding and before the secondary molding is referred to as a primary molded product (W1).
- the workpiece (W) after the secondary molding is referred to as a secondary molded product (W2), a forged product (W2), or a piston material (W2).
- the forging material (W0), the primary molded product (W1), and the secondary molded product (W2) are collectively referred to as a workpiece (W).
- the piston material (W2) as a secondary molded product manufactured by the forging device of the present embodiment includes a circular land portion (91), and one surface side of the land portion (91) ( A pair of skirt portions (92) and (92), a pair of pin boss portions (93) and (93), and a sidewall portion (94) are integrally provided on the lower surface side.
- the pair of skirt portions (92) and (92) are provided at the left and right end portions of the outer peripheral edge portion on one surface side of the land portion (91) so as to protrude to the lower surface side.
- the pair of pin boss portions (93) and (93) are provided on both the front and rear sides of the intermediate portion on the one surface side of the land portion (91) so as to protrude to the lower surface side.
- the sidewall portions (94) are provided on the left and right sides of the pair of front and rear pin boss portions (93) and (93), respectively, and the left and right sides of the front pin boss portion (93) and the pair of skirt portions (92) and (92). Projects to the lower surface side in such a manner that the front end portion is connected and the left and right sides of the rear pin boss portion (93) are connected to the rear end portions of the pair of skirt portions (92) and (92). It is provided to do.
- the primary molded product (W1) of the present embodiment includes a thick disk-shaped main body (81), and one surface side (lower surface side) of the main body portion (81). ) Are provided with a pair of planned skirt portions (82) and (82) and a pair of planned pin boss portions (83) and (83).
- the pair of planned skirt portions (82) and (82) are provided on both left and right end portions of the outer peripheral edge portion on one surface side of the main body portion (81) so as to bulge to the lower surface side, and by secondary molding, The skirt portions (92) and (92) are formed.
- the pair of planned pin boss portions (83) and (83) are provided on both front and rear sides of the intermediate portion on one surface side of the land portion (91) so as to protrude to the lower surface side, and the pin boss portions (93 are formed by secondary molding. ) (93).
- the positioning convex part (85) which comprises an engaging part protrudes to one side (outer diameter direction) in the one side part of the outer peripheral surface in the main-body part (81) of a primary molded product (W1). are integrally formed.
- the upper portion of the positioning convex portion (85) is formed in a trapezoidal shape corresponding to the inner peripheral shape of the claw (42) in the feed bar (41) described later.
- Inclined surfaces are provided on both side portions of the portion (85), and the both side portions are configured as both side guide portions (86) (86).
- an inclined surface is provided on the lower side portion of the positioning convex portion (85), and the lower side portion is configured as a lower guide portion (87).
- the forging material (W0) of the present embodiment has a short cylindrical shape (disk shape).
- the forging material (W0) for example, a continuous cast bar of aluminum (including an aluminum alloy) or a continuous extruded bar cut into a volume corresponding to a predetermined weight by a saw cutting process can be used.
- compositional components of the forging material (W0) are: Si: 5 to 18% by mass, Cu: 2 to 5% by mass, Mg: 0.3 to 1.0% by mass, Fe: 0.1 to 0.8%
- a preferred example is an aluminum alloy containing mass%, Ni: 0.1 to 3 mass%, Mn: 0.1 to 0.5 mass%, and Cr: 0.1 to 0.5 mass%.
- the transfer device (4) of the present embodiment includes a pair of feed bars (41) and (41) arranged on both sides of the conveyance line.
- the pair of feed bars (41) (41) both extend along the transport line (front-rear direction) and are arranged in parallel.
- the pair of feed bars (41) and (41) can be opened / closed by a driving means (not shown) so as to move in the direction of contact / separation (left / right direction) with each other, and can be moved in the front / rear direction synchronously. Further, the pair of feed bars (41) and (41) can move in the vertical direction in synchronization.
- a plurality of pairs (three sets) of a pair of claws (42) and (42) arranged to face each other are provided at predetermined intervals along the front-rear direction.
- Each claw (42) is fixed to the feed bar (41) via a claw holder (43).
- Each pair of claws (42) and (42) has a workpiece carry-in part (50) and a molding part (51) in a state in which the pair of feed bars (41) and (41) are retracted (a state moved to the left side in FIG. 1).
- the forming portions (51) and (52) and the workpiece discharge are respectively disposed. It arrange
- the workpieces (W) are sequentially transferred in parallel, so that the workpieces (W) sequentially supplied to the workpiece carry-in unit (50) are converted into the primary molding unit (51), the secondary molding unit (52), and The workpieces are sequentially transferred to the work discharge unit (53) and discharged sequentially.
- each claw (42) of the transfer device (4) has a V-groove-shaped or U-groove-shaped positioning recess (45) in the inner middle portion in plan view.
- the inner peripheral shape of the positioning concave portion (45) is formed in a trapezoidal shape corresponding to the outer peripheral shape of the positioning convex portion (85) in the primary molded product (W1) described above. ing.
- the inner surfaces on both sides of the trapezoidal positioning recess (45) are formed so as to be inclined corresponding to the both side guide portions (86) (86) of the positioning projection (85), and the both side guide portions (46) ( 46).
- the positioning recess (45) of the claw (42) is configured as an engaged portion.
- the shape of the positioning convex part (85) of the primary molded product (W1) is formed so as to correspond to the shape of the positioning concave part (45) of the claw (42). ) Is used as a positioning recess (45).
- the primary molding die (1) is disposed in the primary molding part (51) and the secondary molding part (52) is secondary molded.
- a mold (2) is arranged.
- the primary molding die (1) includes a lower die (11) and a punch (16) as an upper die.
- the lower mold (11) has a molding hole (12) for opening upward and molding the primary molded product (W1).
- the inner peripheral surface of the molding hole (12) is formed corresponding to the outer peripheral surface shape excluding the upper end surface of the primary molded product (W1). That is, the inner surface of the molding hole (12) has a concave portion (mold portion) for forming the main body portion (81), the skirt planned portion (82), and the pin boss planned portion (83) in the primary molded product (W1). Each is provided.
- a female groove portion (13) for positioning convex portion for forming the positioning convex portion (85) is formed on the outer surface shape of the positioning convex portion (85). Correspondingly formed.
- the lower mold (11) of this configuration is assembled to the lower plate (10) via the lower mold holder (14).
- the lower side of the punch (16) is formed in a shape that can be inserted into the molding hole (12) of the lower mold (11) in a compatible state.
- the punch (16) having this configuration is assembled to the upper plate (20) via the punch holder (18).
- the upper plate (20) is configured to be moved up and down by an elevating drive means (not shown), and the punch (18) is moved up and down by the upper plate (20) to form a molding hole ( 12) It is designed to be driven in. Further, at the time of driving, the male part (17) for positioning convex part of the punch (18) is driven into the female concave part (13) of the lower mold (11).
- a knockout pin (not shown) is accommodated in the bottom of the molding hole (12) in the lower mold (11) so as to protrude upward from the bottom surface of the molding hole (12).
- the primary molded product (W1) molded in the molding hole (12) of the lower mold (11) is pushed up by the knockout pin, and the primary molded product (W1) is A predetermined amount protrudes upward from the molding hole (12) of the mold (11).
- the secondary molding die (2) includes a lower die (21) and a punch (26) as an upper die.
- the lower mold (21) has a molding hole (22) for opening upward and molding the secondary molded product (W2).
- the inner peripheral surface of the molding hole (22) is formed corresponding to the outer peripheral surface shape excluding the upper end surface of the secondary molded product (W2). That is, the inner surface of the molding hole (22) has recesses for forming the land portion (91), the skirt portion (92), the pin boss portion (93), and the sidewall portion (94) in the secondary molded product (W2). Each is provided.
- a female concave portion (23) for positioning convex portion having a concave groove shape is formed corresponding to the positioning convex portion (85).
- the lower mold (21) having this configuration is assembled to the lower plate (10) via the lower mold holder (24).
- the lower side of the punch (26) is formed in a shape that can be inserted into the molding hole (22) of the lower mold (21) in a compatible state.
- a male part (27) for positioning convex part having a convex shape is formed corresponding to the female part (23) for positioning convex part of the lower die (21). Has been.
- the punch (26) having this configuration is assembled to the upper plate (20) via the punch holder (28).
- the secondary molding punch (26) When the upper plate (20) is lowered, the secondary molding punch (26) is lowered in synchronization with the primary molding punch (16) and the molding hole (22) of the secondary molding die (2) is obtained. ). Further, at the time of driving, the male part (27) for positioning convex part of the secondary molding punch (26) is driven into the female part (23) of the lower mold (21).
- a knockout pin (not shown) is provided at the bottom of the molding hole (22) in the lower die (21), as in the primary molding die (1). Can be protruded, and after the molding, the secondary molded product (W2) is pushed up by the knockout pin, and the secondary molded product (W2) is located above the molding hole (22) of the lower mold (21). A fixed amount protrudes.
- the conditions (forging conditions) when performing forging are as follows. That is, the temperature of the workpiece (W) is 380 to 540 ° C., the upper die (punch) temperature in the primary molding die (1) and the secondary molding die (2) is 100 to 250 ° C., and the lower die temperature is 150. Set to ⁇ 370 ° C.
- the workpiece temperature should be set higher in the primary molding.
- the workpiece temperature in the primary molding is set to ⁇ 30 to ⁇ 60 ° C. relative to the solidus temperature of the workpiece (W), and the primary molding is performed in the secondary molding by heat removal from the mold. It is preferable to set the temperature so that it is ⁇ 20 to ⁇ 60 ° C. with respect to the eye workpiece temperature. More preferably, the work temperature of the secondary molding is set so as not to be 370 ° C. or lower.
- a graphite-based lubricant is used as the lubricant for the workpiece (W) and applied by dipping or bonding.
- a lubricant for the mold an aqueous graphite lubricant or a combination of an oily graphite lubricant and an aqueous graphite lubricant is used.
- the mold is lubricated both during the primary molding and during the secondary molding.
- the pair of feed bars (41) (41) is in an open state at the retracted position.
- the forging material (W0) is carried in from the outside of the apparatus by the carry-in conveyor (56), and the workpiece standby unit (50).
- the forging material (W0) is arranged such that its axis is oriented in the vertical direction (vertical direction).
- the pair of feed bars (41) (41) descend.
- the forging material (W0) is sandwiched between the pair of claws (42) and (42), and the lower side portion protrudes downward. Therefore, when the feed bar is lowered, the lower part of the forging material (W0) sandwiched between the pair of claws (42) and (42) is inserted into the upper part of the molding hole (12) of the lower mold (11). .
- the pair of feed bars (41) (41) is opened, the clamping to the forging material (W0) is released, and the forging material (W0) becomes a molding hole ( 12).
- the clamping to the forging material (W0) is released. W0) is reliably and accurately accommodated in the molding hole (12). For this reason, for example, it is possible to reliably prevent the occurrence of poor installation, for example, when the forging material (W0) is displaced during insertion or inserted in a posture different from the normal posture. Therefore, the mold forming described later can be performed smoothly with high accuracy.
- the upper portion of the forging material (W0) is sandwiched between the pair of claws (42) (42). That is, when the lower part of the forged material (W0) is sandwiched between the pair of claws (42) and (42), when the feed bar (41) (41) is lowered, the pair of claws (42) When (42) interferes with the lower mold (11), the lower side portion of the forging material (W0) cannot be placed in the state inserted into the forming hole (12), and the feed bar (41) ( When 41) is opened, it may be difficult to put the forging material (W0) into the forming hole (12) with high positional accuracy.
- the forging is performed.
- the lower side of the material (W0) can be securely inserted into the molding hole (12), and when the feed bar (41) (41) is opened, the forging material (W0) is reliably molded. It can be put into the hole (12).
- the upper plate (20) is lowered and the punch (16) is driven into the molding hole (12) of the lower mold (11), and the forging material (W0) is placed in each recess of the molding hole (12). It is press-fitted and molded into a primary molded product (W1).
- the primary molded product (W1) includes one side of the outer peripheral surface of the main body (81) in addition to the main body (81), the planned skirt (82) and the planned pin boss (83).
- the part is provided with a positioning convex part (85) protruding in the outer diameter direction.
- FIG. 8 shows the state of the punch (16) at the lowermost position when the punch (16) is driven.
- the primary molded product (W1) is pushed up by the knockout pin and the primary molded product (W1) ) Is disposed so as to protrude upward from the molding hole (12).
- the pair of feed bars (41) (41) are retracted and returned to the initial state, and when the primary molded product (W1) is pushed upward by the knockout pin as described above, The feed bar (41) (41) is closed, and the upper part of the primary molded product (W1) of the primary molded part (51) is the second set (second from the left in FIG. 1) of the claws (42 ) (42).
- the positioning convex part (85) formed in the primary molded product (W1) is engaged (fitted) in an appropriate state in the positioning concave part (45) of the one side claw (42),
- the primary molded product (W1) is positioned relative to the transfer device (4).
- the positional shift is corrected. That is, as shown in FIG. 3, if the position of the primary molded product (W1) is shifted when being pinched by the claws (42) (42), the positioning convex portion (85) of the primary molded product (W1). ) Is guided by abutting on both side guide portions (46) and (46) of the positioning recess (45), or the opening edge of the positioning recess (45) is positioned by the positioning projection (85). By being brought into contact with and guided by the guide portions (86) and (86), the position of the primary molded product (W1) is corrected while finely moving.
- the positioning convex portion (85) is adapted to the positioning concave portion (45).
- the primary molded product (W1) is sandwiched between the pair of claws (42) and (42) of the transfer device (4) in a state of being accurately positioned.
- the pair of feed bars (41) and (41) are moved up and then moved forward, and the primary molded product (W1) sandwiched between the second pair of claws (42) and (42) becomes the secondary molded portion. It arrange
- the pair of feed bars (41) and (41) are lowered, and the lower part of the primary molded product (W1) sandwiched between the claws (42) and (42) is the lower mold. It is inserted into the upper part of the molding hole (22) of (21). Furthermore, the lower part of the positioning convex part (85) in the primary molded product (W1) is inserted into the upper part of the female part for positioning convex part (23) in the molding hole (22).
- the pair of feed bars (41) (41) is opened, the nipping to the primary molded product (W1) is released, and the primary molded product (W1) molds the positioning convex portion (85). It is inserted into the molding hole (22) while being inserted into the female mold part (23) for positioning projection of the hole (22).
- the primary molded product (W1) since the primary molded product (W1) is introduced in a state where a part (lower side portion) is inserted into the molding hole (22), the primary molded product (W1) is In the molding hole (22), it is reliably accommodated with high positional accuracy. Furthermore, the primary molded product (W1) has a molding hole (22) in a state where a part (lower side portion) of the positioning convex portion (85) is inserted into the positioning convex female portion (23). In particular, the positioning of the primary molded product (W1) in the direction around the axis (circumferential direction) can be performed accurately, so that the primary molded product (W1) is more accurately positioned in the lower mold ( 21) is set in the molding hole (22).
- the lower guide portion (87) provided on the lower side portion of the lower die (21) comes into contact with the opening edge of the positioning projection male portion (23) and is guided, thereby being primary.
- the molded product (W1) is reliably accommodated in the molding hole (22) of the lower mold (21).
- the upper plate (20) is lowered and the punch (26) is driven into the molding hole (22) of the lower mold (21), so that the primary molded product (W1) is in each recess of the molding hole (22).
- the main body portion (81) is molded into the land portion (91)
- the planned skirt portion (82) is molded into the skirt portion (92)
- the planned pin boss portion (83) is molded into the pin boss portion (93).
- the positioning convex part (85) is clamped by the positioning convex female part (23) of the lower mold (21) and the positioning convex male part (27) of the punch (26), It is compressed in the axial direction and formed into a positioning projection mark (95) having a short axial direction.
- the upper plate (20) and the punch (26) are raised, and then the secondary molded product (W2) is pushed up by the knockout pin and the secondary molded product (W2). ) Is disposed so as to protrude upward from the forming hole (22).
- the positioning projection mark (95) is engaged (fitted) in an appropriate state within the positioning recess (45) of the claw (42) on one side.
- the positioning of the secondary molded product (W2) is accurately achieved.
- the secondary molded product (W2) placed on the workpiece discharge unit (53) is discharged to a predetermined location by the discharge conveyor (57).
- a series of forging processes is completed for the workpiece (W).
- each work (W) placed on the work carry-in part (50) and the forming part (51) (52) is made up of three pairs of claws (42) (42) in the pair of feed bars (41) (41). They are sandwiched at the same time and transferred to the forming sections (51) (52) and the workpiece discharge section (53), respectively.
- primary molding and secondary molding are simultaneously performed on the workpieces (W) of the molding sections (51) and (52), while the workpieces are carried in (50) by the carry-in conveyor (56) during the molding.
- the workpiece (forging material) is carried into the workpiece, and the workpiece (secondary molded product W2) arranged in the workpiece discharge section (53) is discharged by the carry-out conveyor (57).
- the transfer operation and the forming operation of the workpiece (W) by the pair of feed bars (41) and (41) are alternately and repeatedly performed, whereby primary forming and secondary forming are performed on the plurality of workpieces (W). Molding is sequentially performed in parallel, and secondary molded products (forged products) are sequentially discharged.
- the forged product (W2) manufactured in this way is formed as a final-form forged product by performing cutting treatment or the like as necessary to remove burrs, positioning projections (95), and the like. It is what is done.
- the positioning projection (85) is formed on the workpiece (W) by the primary molding, and is made to correspond to the projection (85). Since the positioning recess (45) is formed in the claw (42), when the primary molded product (W1) is clamped by the claw (42) (42), the concave and convex portions (45) (85) are engaged. Thus, the primary molded product (W1) can be positioned, and the primary molded product (W1) can be accurately transferred to the secondary molding die (2). Therefore, in the secondary molding die (2), the primary molded product (W1) can be molded in a regular posture without positional deviation, and a high-quality secondary molded product (W2) can be reliably obtained. it can.
- the positioning convex part (85) is formed on the workpiece (W) at the time of the primary molding, it is not necessary to separately provide a process for forming the positioning convex part, and an increase in the number of processes can be prevented. High productivity can be maintained.
- the transfer device (4) since the transfer device (4) is used, it is possible to convey in a constant cycle time and in a short time, and therefore, temperature control which is an important condition in forging.
- the mold temperature and workpiece temperature can be easily and stably managed as described above, and excellent machining performance can be realized more reliably, which is effective in the forging technique.
- the forging apparatus of this embodiment can reduce a conveyance mistake by using the transfer apparatus (4), and can realize a stable forging operation. For this reason, for example, fluctuations in the mold temperature due to operation stop due to a conveyance mistake can be suppressed, and the above temperature management can be performed more easily and stably, which is more effective in the forging technology. is there.
- the piston material (W2) manufactured by the forging device of the present embodiment has a center (93x) of the pin boss portion (93) at the thrust side (one side) with respect to the piston center (W2x). Is offset by a predetermined amount ( ⁇ x). For this reason, the piston material (W2) is formed in a volume balance such that the thrust side volume is slightly increased.
- a positioning convex portion (85) is formed at a position corresponding to the thrust side (one side skirt portion) of the primary molded product (W1) by primary molding, and positioning is performed at the time of secondary molding. It is possible to accurately adjust the volume balance by pushing the convex portion (85) and increasing the thrust side volume.
- adjustment is made by the amount of pressing of the convex portion (85) at the time of secondary molding, so that the primary molded product (W1) in the primary molding before the secondary molding has a large volume balance. It can be manufactured without consideration, volume balance can be easily adjusted, and productivity can be further improved.
- the positioning convex part (85) when pushing in the positioning convex part (85) at the time of secondary molding, in the above embodiment, only a part of the positioning convex part (85) is pushed in to increase the thickness, but in the present invention, positioning is performed.
- the pushing amount of the convex portion (85) is not particularly limited, and may be set freely as necessary. For example, the entire positioning convex portion (85) may be pushed in to increase the thickness.
- the positioning projection (85) is formed on the opposite side to the thrust side (on the skirt on the opposite side of the thrust), and the positioning projection after the secondary molding. It is also possible to cut the part (85) to adjust the volume balance.
- the volume balance of the primary molded product (W1) during the primary molding is It can be set evenly on the anti-thrust side, and the volume balance during primary molding can be easily adjusted.
- the positioning convex part (85) is formed in the skirt part (thrust side or anti-thrust side), a forged product (W2) is obtained by pushing or cutting the convex part (85). ) Volume balance can be easily adjusted.
- the positioning convex portion (85) is not necessarily formed in the skirt portion, and may be formed in another portion.
- the projection mark (95) can be used for positioning in the cutting process, and the cutting operation can be performed smoothly.
- FIGS. 12A to 12C are views showing the claws (42) of the feed bar (41) in the multistage forging device which is a modification of the present invention.
- this apparatus is provided with a work carry-in part, a primary forming part, a secondary forming part, and a work discharge part as in the above-described embodiment, and moves the work between them by a transfer device.
- the transfer device includes a pair of feed bars (41) and (41).
- a pair of claws (42) and (42) facing each other are provided along the transport line on the pair of feed bars (41) and (41).
- a plurality of sets are provided at predetermined intervals.
- the pair of claws (42) (42) is constituted by a flat plate member having a rectangular shape in plan view.
- the opposing surfaces (tip surfaces) of the pair of claws (42) and (42) are formed by flat surfaces (vertical surfaces), and are configured as positioning portions (engaged portions).
- the workpiece material has a cylindrical shape (disk shape) as in the above embodiment.
- the primary molded product (W1) protrudes to one side of the circular main body portion (81) and one side (upper surface side) of the main body portion (81).
- a pair of pin boss planned portions (83) and (83) formed as described above are integrally provided.
- the pair of pin boss planned portions (83) and (83) are formed into pin boss portions by secondary molding, and have a rectangular parallelepiped shape.
- the outer side surfaces of the pin boss planned portions (83) and (83) are constituted by vertical surfaces and are configured as positioning portions (engaging portions).
- a pin boss portion, a skirt portion, and a sidewall portion are formed on the upper surface side of the workpiece (W). That is, as shown in FIG. 15, the primary molding die (1) of this forging apparatus is a pin boss plan for molding the pin boss planned portions (83) (83) on the punch (16) as the upper die. The part formation recessed part (161) (161) is formed. Further, as shown in FIG. 16, in the secondary molding die (2), pin boss portion forming recesses (261) and (261) for forming the pin boss portion are formed in the punch (26) as the upper die. ing.
- the pair of feed bars (41) (41) is closed.
- the tip surfaces of the pair of claws (42) (42) come into contact with the outer surfaces on both sides of the pin boss planned portions (83) (83) in the primary molded product (W1).
- the next molded product (W1) is sandwiched between the pair of claws (42) and (42).
- the tip surfaces of the pair of claws (42) and (42) are constituted by vertical flat surfaces, and the pin boss planned portion (83) of the primary molded product (W1) on which the tip surfaces are abutted and supported.
- the outer surface of (83) is also constituted by a vertical surface
- positioning of the primary molded product (W1) with respect to the transfer device is achieved by surface contact with each other. That is, when the position of the primary molded product (W1) is shifted when sandwiched between the claws (42) and (42), the outer peripheral edge of the front end surface of the claws (42) and (42) becomes the pin boss planned portion (83). )
- the position of the primary molded product (W1) is corrected while finely moving.
- the tip surfaces of the claws (42) and (42) are the outer surfaces of the pin boss planned portions (83) and (83). In surface contact.
- the primary molded product (W1) is sandwiched between the pair of claws (42) and (42) of the transfer device in a state of being accurately positioned.
- the convex portion (85) is formed on the workpiece (W) side for positioning, and the concave portion (45) is formed on the claw (42) side so that the concave and convex portions are engaged.
- the present invention is not limited to this, and in the present invention, positioning may be achieved by forming a concave portion for positioning on the workpiece side and forming a convex portion on the claw side and engaging the concave and convex portions.
- the workpiece is formed by the two forming portions of the primary forming portion and the secondary forming portion.
- the forming portion is not limited to two, and the forming portion is There may be one or three or more.
- a molding other than forging for example, a burr removal process by press working or the like may be employed.
- the forging method according to the present invention can be applied to a forging technique in which forging is performed on a workpiece to be transferred.
Abstract
Description
ワークに係合部を設けるとともに、前記爪に被係合部を設けておき、
ワークを前記一対の爪により挟持する際に、前記係合部を前記被係合部に係合させることにより、ワークの位置決めを図るようにしたことを特徴とする鍛造加工方法。
前記一対のフィードバーを閉じることにより、対応する各組の爪によって前記ワーク搬入部および前記ワーク処理部のワークをそれぞれ挟持し、その挟持状態で、前記一対のフィードバーを前進させてから開くことにより、各組の爪に挟持されたワークを、前記ワーク処理部および前記ワーク排出部にそれぞれ移載するようにした前項1または2に記載の鍛造加工方法。
前記一対のフィードバーを閉じることにより、対応する各組の爪によって前記ワーク搬入部および前記複数のーク処理部のワークをそれぞれ挟持し、その挟持状態で、前記一対のフィードバーを前進させてから開くことにより、各組の爪に挟持されたワークを前記複数のワーク処理部および前記ワーク排出部にそれぞれ移載するようにした前項3に記載の鍛造加工方法。
前記第1ワーク処理部を、ワークに対し型鍛造による1次成形を行って1次成形品を得る1次成形部として構成するとともに、
前記第2ワーク処理部を、1次成形品に対し型鍛造による2次成形を行って2次成形品を得る2次成形部として構成するようにした前項3または4に記載の鍛造加工方法。
前記1次成形後に前記位置決め凸部の少なくとも一部を押し込んで増肉させることにより、2次成形品の体積バランスを図るようにした前項5または6に記載の鍛造加工方法。
前記1次成形後に前記位置決め凸部を除去することにより、2次成形品の体積バランスを図るようにした前項5または6に記載の鍛造加工方法。
ワークに係合部が設けられるとともに、前記爪に被係合部が設けられ、
ワークが前記一対の爪により挟持される際に、前記係合部が前記被係合部に係合することにより、ワークの位置決めが図られるようにしたことを特徴とする鍛造加工装置。
前記ワーク処理部は、第1ワーク処理部と、その第1ワーク処理部に対して下流側に配置される第2ワーク処理部とを有し、
前記一対のフィードバーが閉じられることにより、対応する各組の爪によって前記ワーク搬入部および前記第1,2ワーク処理部のワークがそれぞれ挟持され、その挟持状態で、前記一対のフィードバーを前進させてから開くことにより、各組の爪に挟持されたワークが前記第1,2ワーク処理部および前記ワーク排出部にそれぞれ移載されるように構成され、
前記第1ワーク処理部に、ワークに対し1次成形を行って1次成形品を得るための1次成形金型が設けられるとともに、
前記第2ワーク処理部に、1次成形品に対し2次成形を行って2次成形品を得るための2次成形金型が設けられる前項14に記載の鍛造加工装置。
ワークに係合部を設けるとともに、前記爪に被係合部を設けておき、
ワークを前記一対の爪により挟持する際に、前記係合部を前記被係合部に係合させることにより、ワークの位置決めを図るようにしたことを特徴とするワークのトランスファ方法。
ワークに係合部が設けられるとともに、前記爪に被係合部が設けられ、
ワークが前記一対の爪により挟持される際に、前記係合部が前記被係合部に係合することにより、ワークの位置決めが図られるようにしたことを特徴とするワークのトランスファ装置。
2…2次成形金型
4…トランスファ装置
41…フィードバー
42…爪
45…位置決め凹部(被係合部)
50…ワーク搬入部
51…1次成形部(第1ワーク処理部)
52…2次成形部(第2ワーク処理部)
54…ワーク排出部
82…スカート予定部
85…位置決め凸部(係合部)
86…ガイド部
91…ランド部
92…スカート部
93…ピンボス部
W…ワーク
W0…ワーク素材
W1…1次成形品
W2…2次成形品(ピストン素材、鍛造加工品)
Claims (17)
- 搬送ラインの両側に配置される一対のフィードバーを閉じることにより、前記一対のフィードバーに設けられた一対の爪により、ワーク搬入部に設置されたワークを両側から挟持するとともに、その挟持状態で、前記一対のフィードバーを搬送ラインに沿って前進させてから開くことにより、ワークをワーク処理部に移載する一方、前記ワーク処理部に移載されたワークに対し、鍛造加工を行うようにした鍛造加工方法であって、
ワークに係合部を設けるとともに、前記爪に被係合部を設けておき、
ワークを前記一対の爪により挟持する際に、前記係合部を前記被係合部に係合させることにより、ワークの位置決めを図るようにしたことを特徴とする鍛造加工方法。 - 前記係合部および前記被係合部のうち一方を、位置決め凸部によって構成するとともに、残り一方を、前記位置決め凸部を嵌合して位置決めを図る位置決め凹部によって構成するようにした請求項1に記載の鍛造加工方法。
- 前記ワーク処理部の搬送ラインに沿って下流側にワーク排出部を設けるとともに、前記一対のフィードバーに前記一対の爪を複数組設けておいて、
前記一対のフィードバーを閉じることにより、対応する各組の爪によって前記ワーク搬入部および前記ワーク処理部のワークをそれぞれ挟持し、その挟持状態で、前記一対のフィードバーを前進させてから開くことにより、各組の爪に挟持されたワークを、前記ワーク処理部および前記ワーク排出部にそれぞれ移載するようにした請求項1または2に記載の鍛造加工方法。 - 前記ワーク処理部は、搬送ライン沿って配置される複数のワーク処理部を有し、
前記一対のフィードバーを閉じることにより、対応する各組の爪によって前記ワーク搬入部および前記複数のーク処理部のワークをそれぞれ挟持し、その挟持状態で、前記一対のフィードバーを前進させてから開くことにより、各組の爪に挟持されたワークを前記複数のワーク処理部および前記ワーク排出部にそれぞれ移載するようにした請求項3に記載の鍛造加工方法。 - 前記ワーク処理部は、第1ワーク処理部と、その第1ワーク処理部に対して下流側に配置される第2ワーク処理部とを有し、
前記第1ワーク処理部を、ワークに対し型鍛造による1次成形を行って1次成形品を得る1次成形部として構成するとともに、
前記第2ワーク処理部を、1次成形品に対し型鍛造による2次成形を行って2次成形品を得る2次成形部として構成するようにした請求項3または4に記載の鍛造加工方法。 - ワークの前記係合部を、前記1次成形によって形成するようにした請求項5に記載の鍛造加工方法。
- ワークとしての1次成形品に形成される前記係合部を、位置決め凸部によって構成し、
前記1次成形後に前記位置決め凸部の少なくとも一部を押し込んで増肉させることにより、2次成形品の体積バランスを図るようにした請求項5または6に記載の鍛造加工方法。 - 前記位置決め凸部の押し込みを、前記2次成形により行うようにした請求項7に記載の鍛造加工方法。
- ワークとしての1次成形品に形成される前記係合部を、位置決め凸部によって構成し、
前記1次成形後に前記位置決め凸部を除去することにより、2次成形品の体積バランスを図るようにした請求項5または6に記載の鍛造加工方法。 - 2次成形品として、ランド部の一面側に一対のスカート部および一対のピンボス部が一体に形成されたピストン素材が作製されるようにした請求項5~9のいずれか1項に記載の鍛造加工方法。
- 前記係合部を、1次成形品における前記スカート部に対応するスカート予定部の外周面に、形成するようにした請求項10に記載の鍛造加工方法。
- 前記位置決め凸部の両側に、その凸部を前記位置決め凹部に案内するためのガイド部が設けられる請求項2に記載の鍛造加工方法。
- ワークとして、アルミニウムまたはアルミニウム合金製のものが用いられる請求項1~12のいずれか1項に記載の鍛造加工方法。
- 搬送ラインの両側に配置される一対のフィードバーが閉じられることにより、前記一対のフィードバーに設けられた一対の爪により、ワーク搬入部に設置されたワークが両側から挟持されるとともに、その挟持状態で、前記一対のフィードバーが搬送ラインに沿って前進してから開くことにより、ワークがワーク処理部に移載される一方、前記ワーク処理部に移載されたワークに対し、鍛造加工が行われるようにした鍛造加工装置であって、
ワークに係合部が設けられるとともに、前記爪に被係合部が設けられ、
ワークが前記一対の爪により挟持される際に、前記係合部が前記被係合部に係合することにより、ワークの位置決めが図られるようにしたことを特徴とする鍛造加工装置。 - 前記ワーク処理部の搬送ラインに沿って下流側にワーク排出部が設けられ、
前記ワーク処理部は、第1ワーク処理部と、その第1ワーク処理部に対して下流側に配置される第2ワーク処理部とを有し、
前記一対のフィードバーが閉じられることにより、対応する各組の爪によって前記ワーク搬入部および前記第1,2ワーク処理部のワークがそれぞれ挟持され、その挟持状態で、前記一対のフィードバーを前進させてから開くことにより、各組の爪に挟持されたワークが前記第1,2ワーク処理部および前記ワーク排出部にそれぞれ移載されるように構成され、
前記第1ワーク処理部に、ワークに対し1次成形を行って1次成形品を得るための1次成形金型が設けられるとともに、
前記第2ワーク処理部に、1次成形品に対し2次成形を行って2次成形品を得るための2次成形金型が設けられる請求項14に記載の鍛造加工装置。 - 搬送ラインの両側に配置される一対のフィードバーを閉じることにより、前記一対のフィードバーに設けられた一対の爪により、ワーク搬入部に設置されたワークを両側から挟持するとともに、その挟持状態で、前記一対のフィードバーを搬送ラインに沿って前進させてから開くことにより、ワークをワーク処理部に移載するようにしたワークのトランスファ方法であって、
ワークに係合部を設けるとともに、前記爪に被係合部を設けておき、
ワークを前記一対の爪により挟持する際に、前記係合部を前記被係合部に係合させることにより、ワークの位置決めを図るようにしたことを特徴とするワークのトランスファ方法。 - 搬送ラインの両側に配置される一対のフィードバーが閉じられることにより、前記一対のフィードバーに設けられた一対の爪により、ワーク搬入部に設置されたワークが両側から挟持されるとともに、その挟持状態で、前記一対のフィードバーが搬送ラインに沿って前進してから開くことにより、ワークがワーク処理部に移載されるようにしたワークのトランスファ装置であって、
ワークに係合部が設けられるとともに、前記爪に被係合部が設けられ、
ワークが前記一対の爪により挟持される際に、前記係合部が前記被係合部に係合することにより、ワークの位置決めが図られるようにしたことを特徴とするワークのトランスファ装置。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112247064A (zh) * | 2020-09-18 | 2021-01-22 | 江苏太平洋精锻科技股份有限公司 | 一种长柄锥齿轮自动化精整系统和方法 |
CN114393162A (zh) * | 2022-01-20 | 2022-04-26 | 安庆汇通汽车部件股份有限公司 | 一种稳定杆成型用工件自动上下料和传送系统 |
CN114393162B (zh) * | 2022-01-20 | 2023-08-25 | 安庆汇通汽车部件股份有限公司 | 一种稳定杆成型用工件自动上下料和传送系统 |
Also Published As
Publication number | Publication date |
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CN102300653A (zh) | 2011-12-28 |
KR20110084284A (ko) | 2011-07-21 |
EP2380679A4 (en) | 2016-11-23 |
KR101335822B1 (ko) | 2013-12-03 |
CN102300653B (zh) | 2014-03-19 |
EP2380679A1 (en) | 2011-10-26 |
JP5373378B2 (ja) | 2013-12-18 |
JP2010131613A (ja) | 2010-06-17 |
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