EP0555604A2 - Revolverstanzmaschine - Google Patents

Revolverstanzmaschine Download PDF

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Publication number
EP0555604A2
EP0555604A2 EP92403431A EP92403431A EP0555604A2 EP 0555604 A2 EP0555604 A2 EP 0555604A2 EP 92403431 A EP92403431 A EP 92403431A EP 92403431 A EP92403431 A EP 92403431A EP 0555604 A2 EP0555604 A2 EP 0555604A2
Authority
EP
European Patent Office
Prior art keywords
die
striker
turret
ram
dies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92403431A
Other languages
English (en)
French (fr)
Other versions
EP0555604B1 (de
EP0555604A3 (en
Inventor
Tetsuji Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amada Co Ltd
Amada Manufacturing America Inc
Original Assignee
Amada Co Ltd
Amada Manufacturing America Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/807,586 external-priority patent/US5177843A/en
Priority claimed from US07/838,867 external-priority patent/US5184498A/en
Application filed by Amada Co Ltd, Amada Manufacturing America Inc filed Critical Amada Co Ltd
Priority to EP95114957A priority Critical patent/EP0694347B1/de
Publication of EP0555604A2 publication Critical patent/EP0555604A2/de
Publication of EP0555604A3 publication Critical patent/EP0555604A3/en
Application granted granted Critical
Publication of EP0555604B1 publication Critical patent/EP0555604B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/12—Punching using rotatable carriers

Definitions

  • the present invention relates to a turret punch press, and, in particular, to a mechanical turret punch press in which an upper tool is actuated jointly by both a mechanical striker and a hydraulic striker.
  • a commonly known turret punch press comprises a freely rotatable upper turret equipped with a plurality of freely detachable upper tools, a freely rotatable lower turret in opposition to the upper turret, and a freely vertically mobile striker which strikes the upper tool in the working area.
  • a disk support which supports the lower turret is provided on the lower side of the lower turret in the working area for resisting the impact from a striker.
  • the upper turret and the lower turret and rotated in synchronism and a pair of dies for specific forming is positioned in the working area, a workpiece is positioned between the two dies, and the forming process is performed by pressing the upper and lower dies together using a mechanical or a hydraulic device.
  • An object of the present invention is to provide, with due consideration to the drawbacks of such conventional devices, a turret punch press wherein, even when the height of the die is not adjusted with scrupulous care, there is no damage to the die or the turret.
  • a turret punch press comprising: an upper turret on which an upper die is detachably mounted; a lower turret on which a lower die is detachably mounted in mutual opposition to the upper turret; a ram for causing the upper and lower dies to work together at an operating position; a mechanical type of vertically moving means for moving the ram vertically; a striker device provided on the lower end of the ram for striking the upper die; a striking element within the striker device; and a hydraulic cylinder for moving the striking element vertically in the striker device.
  • a turret punch press further comprising: a disk support for supporting the lower turret in the working area; a freely movable slider provided in the disk support: a hydraulic cylinder for pushing up the upward-forming lower die positioned in the operating position and normally below a passline; and a residue hole into which the residue from the punching operation drops, selectively positioned in the working area; wherein the upper dies comprise an upper die for punching and an upper die for upward forming; and the lower dies comprise a lower die for punching and a lower die for upward forming.
  • the upper and lower turrets are rotated, and an upper die of a plurality of dies, positioned in the working area, is struck by a striker element of a striker device mounted on the lower end of a ram when the ram descends.
  • a hydraulic cylinder which vertically moves the striker element with respect to the ram is mounted on the striker device, and the amount of stroke of the striker element with respect to the upper die is the sum the amount of stroke of the ram and the amount of stroke of the striker element itself, which is moved vertically by the hydraulic cylinder. Accordingly, the upper dies and the lower dies come into contact and the processing occurs only when the ram and the piston rod are both at bottom dead center.
  • the striker element of the striker device is normally positioned at bottom dead center, the ram is lowered by the mechanical vertically moving means, and the punching operation is effectively performed.
  • the striker element of the striker device is first at its upper most position with respect to the ram, and after the ram is lowered by the mechanical vertically moving means, the striker element is lowered by the hydraulic cylinder and the forming operation is effectively performed.
  • the freely movable slider is provided in the disk support which supports the lower turret; provided in the slider is the hydraulic cylinder, which pushes up an upward-forming lower die, and the residue receiving hole into which the residue from the punching operation drops. Accordingly, when the slider is moved, the hydraulic cylinder or the residue receiving hole is selectively positioned at the working area to cope with an upward-forming operation or a punching operation. Then, the processing is carried out.
  • FIG. 1 is a sectional view of the main parts of a first embodiment of a turret punch press of the present invention taken along the line I-I in FIG. 2.
  • FIG. 2 is a side elevation viewed in the direction of the arrow II in FIG. 1.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 2.
  • FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 3.
  • FIG. 5 is an enlarged bottom view with one part omitted, viewed in the direction of the arrow V in FIG. 1.
  • FIG. 6 is a detailed sectional view of a manual valve.
  • FIG. 7 is a detailed sectional view of a switching valve.
  • FIG. 8 is a perspective view showing the hydraulic mechanism of a hydraulic cylinder used for striking.
  • FIG. 9 is a plan view showing a disk support.
  • FIG. 10 is a sectional view taken along the line X-X in FIG. 9.
  • FIG. 11 in an elevation showing the entire turret punch press.
  • FIG. 12 is a sectional view taken along the line XI-XI in FIG. 11.
  • FIGS. 13-18 are schematic drawings showing the operation of the punch press during upward-forming process.
  • FIG. 19 is a plan view showing a disc support provided in a second embodiment of the punch press of the present invention.
  • FIG. 20 is a section taken along the line XX-XX of FIG. 19.
  • FIG. 21 is a plan view showing the disc support.
  • FIG. 22 is a section taken along the line XXII-XXII of FIG. 21.
  • FIG. 23 is an enlarged section showing the upper and lower tools prior to the forming operation.
  • FIG. 24 is an enlarged section showing the upper and lower tools during the forming operation.
  • FIG. 25 is a front elevation of the punch press.
  • FIG. 26 is a plan view taken along the line XXVI-XXVI of FIG. 25.
  • a side frame 5 and a side frame 7 are erected, one on each side of a base 3 of a turret punch press 1.
  • An upper frame 9 is provided on the upper sides of the side frame 5 and the side frame 7.
  • a vertically movable ram 11 mounted on the upper frame 9 is moved by a mechanical vertically moving means such as a crank shaft 10.
  • a striker device 15 having a piston rod 13 is provided as a striker element, freely movable vertically by a hydraulic mechanism which will be described in detail hereinafter.
  • a disk-shaped upper turret 21 is rotatably supported by an upper rotary shaft 21a.
  • Detachably mounted on the upper turret are a plurality of upper punching dies 17 and a plurality of upward-forming upper dies 19 as the upper dies.
  • a plurality of punching upper dies 17a is mounted in the radial direction of the upper turret 21 (the A direction in the drawing).
  • a plurality of upward-forming upper dies can also be mounted in the radial direction of the upper turret 21 (the A direction in the drawing) in place of the normal upper dies 19, in exactly the same manner as for the punching dies 17a.
  • Each of the dies 17a is vertically movable independently of each other.
  • the dies 17a are adapted to be positioned in the operating position under the ram 11.
  • a lower turret 27 is rotatably supported by a lower rotary shaft 27a on the upper surface of the base 3 opposing the upper turret 21.
  • Detachably mounted on the lower turret are a plurality of lower punching dies 23 and lower upward-forming dies 25 respectively as the lower opposing the upper punching dies 17 and the upper upward-forming dies 19.
  • a plurality of lower dies (not shown) each corresponding to the upper dies 17a are provided on the lower turret 27 in the radial direction of the lower turret 27.
  • the upper turret 21 and the lower turret 27 are synchronized and rotatably controlled by means of, for example, a turret servo motor (omitted from the drawings) mounted on the side frame 5.
  • a turret servo motor (omitted from the drawings) mounted on the side frame 5.
  • a pair of guide rails 29 each extending in the Y-axis direction are juxtaposed in the direction perpendicular to the plane of the drawing in Fig. 11 (only one of the rails 29 is shown in Fig. 11).
  • a pair of movable tables 33 positioned one on each of the front and back sides of a fixed table 31 secured on the base 3, are movably supported on the guide rails 29.
  • the movable tables 33 are integrally mounted on a carriage base 35 extending in the X-axis direction over the fixed table 31.
  • a carriage 37 which moves in the longitudinal direction (the X-axis direction) crossing the direction of motion of the movable table 33 (the Y-axis direction in the drawings) is mounted on the carriage base 35.
  • a clamp 39 which clamps one end of a plate-shaped workpiece W is movable mounted in the X-axis direction on the carriage 37.
  • the movement of the carriage 37, on which is mounted the clamp 39 for clamping one end of a plate-shaped workpiece W is performed in the X-axis direction along the carriage base 35, and the movement of the carriage 35 is performed in the Y-axis direction along the guide rails 29.
  • a ram guide 41 is provided on the upper frame 9 for moving the ram 11 vertically. Furthermore, a channel-shaped guide 43 opened downward is installed on the bottom surface of the ram 11 by means of a bolt 45, extending in the radial direction of the upper turret 21 (the A direction in the drawings).
  • a cylinder bracket 47 (Fig. 3) is installed by means of a bolt 49 on the upper end of the guide 43 in FIG. 3.
  • a fixed hydraulic cylinder 51 is securely installed on both the cylinder bracket 47 and the guide 43 on the upper end section of the guide 43 in Fig. 3. Accordingly, the guide 43, the cylinder bracket 47, and the fixed hydraulic cylinder 51 do not move with respect to the ram 11.
  • a movable hydraulic cylinder 53 opposing the fixed hydraulic cylinder 51 is provided in a manner allowing free movement along the guide 43.
  • the tip of a piston rod 51a of the fixed hydraulic cylinder 51 and the tip of a piston rod 53a of the movable hydraulic cylinder 53 are linked by a joint 55.
  • the bottom surface of the movable hydraulic cylinder 53 is secured to a connecting member 59, fastened by a bolt 57 to the left end to the striker device 15.
  • a hydraulic cylinder 65 is provided in the striker device 15 as a hydraulic striker cylinder with a piston rod 67 projecting freely downward.
  • the piston 67 is selectively positioned above the normal upper dies 17, 19 or above a specific upper die 17a provided in the radial direction of the upper turret 21 by moving and positioning the striker device 15.
  • the stroke length for the vertical movement of the tip of the piston rod 67 is the sum of the stroke length of the ram 11 itself and the stroke length of the piston rod 67 of the hydraulic striker cylinder 65.
  • An air blower 69 is provided at the center of the bottom surface of the piston rod 67.
  • compressed air supplied from a tube d1 (see FIG. 4 and FIG. 5) is fed from the side surface of the cylinder chamber to the inside of the piston rod 67.
  • This compressed air is blown out of discharge ports (not shown) in the lower surfaces of the upper dies 17, 19, so that the workpiece W is easily separated from the upper dies 17, 19 and the scrap is easily removed from the upper dies 17, 19.
  • a proximity switch 71 for detecting the vertical movement of the piston rod 67 is provided on the punching device 15 in the vicinity of the piston rod 67.
  • the switch 71 detects the vertical position of the piston rod 67, and detects whether the piston rod 67 has reached the top and bottom dead center in the conventional manner.
  • a tube b1 is provided to feed operating fluid to an upper cylinder chamber 73 of the punching hydraulic cylinder 65 to move the piston rod 67 downward.
  • One end of the tube b1 is open to the upper cylinder chamber 73 and the other end is open to the right side end surface of the striker device 15.
  • the operating fluid from the tube b1 is fed into the upper cylinder chamber 73, the operating fluid in a lower cylinder chamber 75 is discharged by the upward movement of the piston rod 67.
  • a tube b2 is provided parallel to the tube b1 to feed operating fluid to the lower cylinder chamber 75 to elevate the piston rod 67.
  • One end of the tube b2 is open to the lower cylinder chamber 75 and the other end is open to the right end surface of the striker device 15.
  • a tube c2 connected to a manual valve 77 is provided on the tube b1 in a position close to the punching hydraulic cylinder 65, extending in the direction perpendicular to the extension of the tube b1.
  • a tube a2 connected to a switching valve 79 is provided on the tube b1 in a position close to the vicinity of the right end surface of the device 15, extending in the direction perpendicular to the extension of the tube b1.
  • the switching valve 79 is for controlling the flow of the operating fluid.
  • An end of the valve 79 is mounted on the right end surface of the striker device 15 as a port b4.
  • a tube a1 connected to the switching valve 79 is provided in a position close to the punching hydraulic cylinder 65 on the tube b2.
  • a tube b3 is coupled to a tube c1 which is connected to the switching valve 79.
  • One end of the tube b3 opens to the right end surface of the striker device 15.
  • a disk support 81 is secured to a section of the upper surface of the base 3 under the lower turret 27 in the working area beneath the ram 11, to prevent the lower turret 27 from vibrating during processing.
  • This disk support 81 has a pair of support members 83 as reinforcing members and a slider 85 which moves horizontally between the support members 83.
  • the leading end of a piston rod 89 of a shift cylinder 87 is attached to the right end surface of the slider 85 in the Figs. 9 and 10.
  • the slider 85 is provided on the upper surface of a guide 91 which is in turn provided on the upper surface of the base 3.
  • the slider 85 is moved along a path between the support members 83 by the horizontal movement of the piston rod 89.
  • a residue hole 93 through which a residue produced by the punching process is discarded, is formed at a position corresponding to the working area under the ram 11.
  • a residue disposal guide 95 with a suitable hole for discarding the residue is provided in the left half section of the slider 85.
  • a fluid cylinder 97 is provided as a forming cylinder in the right half section of the slider 85 for pressing the lower upward-forming die 25 upward.
  • the lower upward-forming die 25 includes a vertically movable die holder 99, a die tip 101 integrally provided in the die holder 99, and a workpiece ejector 103 vertically movable with respect to the die tip 101.
  • the upper end of the die tip 102 is adapted to engage the upper upward-forming die 19 (FIG. 11).
  • the workpiece ejector 103 is urged upward with respect to the die tip 101 by a spring 105.
  • a piston rod 107 of the forming cylinder 97 is freely movable in the vertical direction. Therefore, by feeding operating fluid from a tube e1 to an upper chamber 97a of the forming cylinder 97, the piston rod 107 is retracted into the cylinder 97 so that the upper end of the die tip 101 does not project above a pass-line L of the workpiece. On the other hand, by feeding the operating fluid from a tube e2 to a lower chamber 97b of the forming cylinder 97, the piston rod 107 is moved upward so that the die holder 99 is pressed upward and the upper end of the die tip 101 is projected above the pass-line L. Thus, a forming processing is performed. After the processing, the workpiece W which may be engaged by the die tip 101, can be removed from the die tip 101 by the upward movement of the workpiece ejector 103.
  • the piston rod 107 is retracted into the forming cylinder 97. Therefore the piston rod 107 does not project upward from the upper surface of the slider 85. Specifically, the rotary positioning of the lower turret 27 and the movement of the slider 85 are performed while the piston rod 107 is retracted into the forming cylinder 97. Thus, there is no obstacle to the movement of the slider 85.
  • a workpiece W to be processed is clamped by the clamps 39 on the carriage 37. Then, the part of the workpiece W is positioned in the working area between the upper turret 21 and the lower turret 27 by controlling the movement of the carriage 37 in the X-axis direction along the carriage base 35, and by controlling the movement of the carriage base 35 in the Y-axis direction along the guide rails 29.
  • the upper turret 21 and the lower turret 27 are rotated in synchronism by a turret servo motor and the specified upper and lower punching dies 17, 23 are positioned in the working area.
  • the punching device 15 is positioned above the desired die 17a by means of the fixed hydraulic cylinder 51 and the movable hydraulic cylinder 53.
  • the piston rod 67 of the hydraulic striker cylinder 65 is projected downward and halted at bottom dead center.
  • the piston rod 89 of the shift cylinder 87 provided in the disk support 81 is drawn back, and the residue disposal guide 95 of the slider 85 is positioned in the working area.
  • the piston rod 67 of the hydraulic striker cylinder 65 is preferably retracted; with this retraction, the piston rod 67 is prevented from being collide with by the head of an upper punching die.
  • the above embodiment is advantageous in that it is unnecessary to operate the hydraulic striker cylinder 65 during the punching process since the piston rod 67 of the hydraulic striker cylinder 65 is fixed at bottom dead center during the punching process. Therefore the frequency of use is reduced and the life span is increased.
  • the striker device 15 provided on the lower end of the ram 11 is freely moved and positioned in the radial direction of upper turret 21, so that a plurality of upper dies can be mounted in the radial direction on the upper turret 21. For this reason, the number of dies which can be installed is increased and the effectiveness of the operation is improved.
  • the piston rod 89 of the shift cylinder 87 is extended, and the forming cylinder 97 of the slider 85 is positioned in the working area. In this way, the workpiece W is positioned and the upper and lower dies 19, 25 are set.
  • crank shaft 10 is then rotated so that the piston rod (striker element) 67 and the upper die 19 are moved downward until the lower end of the upper die 19 is positioned just above the surface of the workpiece W.
  • an elastic member 201 is provided under the die holder 99 for a purpose mentioned hereinafter.
  • the striker cylinder 65 is energized so that the upper die 19 is further moved downward until the lower end of the upper die is in contact with the surface of the workpiece W.
  • the lower cylinder (forming cylinder) 97 in then energized so that the lower die 25 is moved upward. As a result, an upward forming is performed in the workpiece W by the die tip 101 of the lower die 25.
  • the impulse force from die tip 102 on the workpiece W is buffered by the elastic member 201.
  • the lower cylinder 97 is then de-energized, and the lower die 25 is moved downward by the restoring force of the elastic member 201 and the spring 105 (FIG. 10).
  • the upper die 19 is subsequently moved upward to return its original position by the rotation of the crank shaft 10 and the upward movement of the upper cylinder 65.
  • the workpiece W is maintained in its original height during forming.
  • the workpiece is prevented from being damaged during the processing.
  • the height of the upper die 19 can be adjusted within the stroke length of the striker cylinder 65, the forming in the workpieces W with different thickness can be easily performed; this is because, the workpieces W with different workpieces can be maintained in their respective original height during forming by adjusting the height of the lower end of the upper die 19.
  • the forming cylinder 97 is built into the right half of the slider 85 the above-mentioned embodiment and the residue disposal guide 95 is provided on the left half.
  • the shift cylinder 87 is provided on the right side surface of the slider 85.
  • the present invention is not limited to this positional relationship.
  • the hydraulic shift cylinder 87 is used for moving the slider 85, the present invention is not limited to this configuration.
  • a combination of a drive motor and a geared device may be used.
  • the turret punch press of the present embodiment has a configuration as explained above, and the striker device with a hydraulic cylinder equipped with a vertically movable striker element on the lower end of the ram is provided, the amount of stroke of the striker element with respect to the upper die is the sum of the amount of stroke of the ram and the amount of stroke of the hydraulic cylinder. Accordingly, the upper die contacts the lower die and processing can occur only when the ram and the striker element of the striker device are both at bottom dead center. Accordingly, during the punching process, the striker element of the striker device is normally positioned at bottom dead center, and, if the ram is lowered by the mechanical vertically moving means, the action of the hydraulic cylinder is unnecessary.
  • the frequency of use is reduced, and the life span is increased.
  • the striker element of the hydraulic cylinder is lowered and the forming operation is performed, even if the ram is lowered rapidly by the mechanical vertically moving means, the upper die does not reach bottom dead center, therefore there is no impact on the lower die so no breakage or damage occurs.
  • the adjustment of the height of the upper and lower dies need not be scrupulously performed as is required conventionally so operability is improved.
  • the disk support is secured below the lower turret, it is possible to support the lower turret against the striking force in the conventional manner.
  • the movably positioned slider is provided in the disk support, and because the hydraulic cylinder which presses the lower upward-forming die upward and the residue hole through which the residue from the punching operation is dropped are provided, the hydraulic cylinder during the upward-forming process, or the residue hole during the punching process, can be selectively positioned at the process position. As a result, it is possible to handle both the upward-forming process and the punching process.
  • the lower upward-forming die is normally below the pass line so that is no obstacle when the lower turret rotates or when the workpiece is introduced. Because the hydraulic cylinder projects the lower upward-forming die upward to a position of a specified height during processing, a proper upward-forming process can be performed.
  • FIGS. 19-26 shows the second embodiment of the present invention.
  • a turret punch press 201 of the second embodiment is generally similar to that of the first embodiment. That is to say, the press 201 comprises a base 203, side frames 205, 207 provided on both sides of the base 203, and an upper frame 209 provided on the side frames 205, 207.
  • a disk-like upper turret 211 is rotatably supported by an upper rotation axis 215a under the upper frame 209.
  • a plurality of upper tools 21 for punching a workpiece W and upper tools 213 for forming of the workpiece W are removably installed on the upper turret 211.
  • a disk-like lower turret 221 is rotatably supported by an lower rotation axis 221a in a way opposing the upper turret 211 and above the base 203.
  • a plurality of lower tools 217 for punching the workpiece W and lower tools 219 for forming of the workpiece W are removably installed on the lower turret 221.
  • a disc support 223 is secured on the base 203 under the lower turret 221.
  • a ram 227 having a striker 225 for striking the upper tools 211, 213 is provided on the upper frame 209.
  • the upper and lower turrets 215, 217 are synchronously rotated by a servo motor (not shown) installed on the frames.
  • a servo motor not shown
  • the desired upper and lower tools 211, 217 for punching are positioned in a working area where the workpiece W is processed.
  • the desired upper and lower tools 213, 219 for forming are positioned in the working area.
  • a pair of guide rails 229 extending in the Y direction (FIG. 25) are provided on the base 203.
  • a pair of movable tables 233 are positioned, one on each side of a fixed table 231, and supported on the guide rails 229.
  • the movable tables 233 are attached to a carriage base 235 extending in the X direction (FIG. 26) bridging the fixed table 231.
  • a carriage 237 movable in the X direction perpendicular to the moving direction of the movable table 233 (Y direction) is provided on the carriage base 235.
  • the carriage 237 is provided with a clamp device 239 for clamping an edge of the workpiece W.
  • positioning of the workpiece W is controlled by moving the carriage 237 in the X direction and by moving the carriage 237 on the guide rail 229 in the Y direction.
  • a plurality of upper tools 211 for punching are removably installed on the upper turret 215, and a plurality of upper tools 213 for forming are removably installed in tool installation holes 241 in the upper turret 215.
  • the configuration of the upper tool 211 for punching is well known in the art, and therefore will not be described in detail.
  • the upper tool 213 for forming is provided with a punch body 243 with a recess 245 at its lower end.
  • the punch body 243 has a flange 247 at its upper end.
  • a spring 249 which normally presses the flange 247 upward is provided between the flange 247 and the upper turret 215.
  • the punch body 243 is slidably installed in a punch guide 251 mounted on the upper turret 215.
  • the punch body 243 is supported by a spring 253 at the upper end of the punch guide 251.
  • the spring constant of the spring 253 is larger than that of the spring 249.
  • a flange 265 is formed in a way projecting outward from the upper end of the punch guide 251 to keep the punch guide 251 from dropping through the hole 241.
  • a plurality of lower tools 217 for punching are removably installed on the lower turret 221; a plurality of lower tools 219 for forming are removably installed in tool installation holes 257 in the lower turret 221.
  • the configuration of the lower tool 217 for punching is well known in the art, and therefore will not be described in detail.
  • the lower tool 219 for forming comprises a die holder 259, a die chip 261 integrally formed on the die holder and adapted to be inserted into the recess 245 of the punch body 243, and a work ejector 263 vertically movable with respect to the die chip 261.
  • a spring 267 is provided between the work ejector 263 and the die holder 259 to push up the ejector 263.
  • a spring 269 is provided between the die holder 259 and a flange 265 formed in the tool installation hole 257, to push down the die holder 259.
  • the lower tool 219 in a normal state is below the pass line PL (the feed line for the workpiece W).
  • the disc support 223 includes a hollow rectangular parallelepiped block with apertures on the right side and on the upper and lower sides. Both side walls 223a and 223b mainly support the lower turret 221 from the underside. The thickness of the side walls 223a and 223b is determined so that the cross-sectional area thereof is larger than a predetermined area subject to pressure.
  • the disc support 223 contains a freely reciprocating movable block 271.
  • the left end of the movable block 271 is connected to a piston rod 275 of a slide cylinder 273.
  • the movable block 271 is formed as a rectangular parallelepiped to fit the inside configuration of the disc support 223.
  • a through hole 277, through which punched scraps are dropped, is provided on the right half of the movable block 271.
  • a press cylinder 279 with a piston rod 281 is embedded in the left half of the movable block 271 as means for pushing up the lower tool 219 for forming.
  • a top 281a of the piston rod 281 pushes up the die holder 259, causing the lower tool 219 to project above the pass line PL (FIG. 24).
  • the piston rod 281 is retracted into the press cylinder 279, so that the lower tool 219 does not project above the pass line PL (FIG. 23).
  • the carriage 237 clamping the workpiece W moves in the X direction on the carriage base 235.
  • the carriage base 235 moves on the guide rails 229 in the Y direction, so that the part of the workpiece W to be processed is positioned in the working area between the upper lower turrets 215 and 221.
  • the desired upper and lower tools 211, 217 are positioned in the working area by synchronously rotating the upper and lower turrets 215, 221 by means of servo motors (not shown).
  • the piston rod 275 of the slide cylinder 273 is then retracted to move the movable block to position the through hole 277 in the working area, after which the striker 225 (FIG. 25) strikes the upper tool 211 to perform the punching in a workpiece.
  • the punched scraps drop down through the through hole 277.
  • the part of the workpiece W to be processed is positioned in the working area between the upper and lower turrets 215, 221 in the same manner as for the punching.
  • the desired upper and lower tools are positioned in the working area by rotating the upper and lower turrets 215, 221 by means of the servo motors.
  • the piston rod 275 of the slide cylinder 273 is extended to move the movable block 271 to position the press cylinder 279 in the working area.
  • the right end of the movable block 271 projects from the aperture at the right side of the disc support 223 (FIGS. 21 and 22).
  • the piston rod 281 of the press cylinder 279 is retracted so that the lower tool 219 does not project above the pass line PL, as shown in FIG. 23.
  • the piston rod 281 is then extended to push up the die holder 259, as shown in FIG. 24, so that the lower tool 219 projects above the pass line PL.
  • the striker 225 strikes the upper end of the punch body 243 which descends accordingly together with the punch guide 251.
  • the spring 253 also descends and is not compressed until the flange 255 of the punch guide 251 comes into contact with the upper face of the upper turret 215.
  • the punch body 243 descends compressing the spring 253, and a forming is performed in the workpiece.
  • the striker 225 is elevated and the spring 258 extends by its restoring force to press up the punch body 243.
  • the striker 225 further ascends and then the spring 249 extends to raise the punch body 243 with the punch guide 251.
  • the piston rod 281 of the press cylinder 279 is retracted and the die holder 259 with the die chip 261 is pressed down by the restoring force of the spring 269. Consequently, the work ejector 263 is raised with respect to the die holder 259 by the restoring force of the spring 267, thereby pushing up the workpiece W and releasing it from the die chip 261.
  • the striker 225 can descend to the original bottom dead point so that the upper tool 213 abuts the upper surface of the upper turret 215. Thereafter the piston rod 281 of the press cylinder 279 can be extended to push up the die holder 259 to perform forming of the workpiece W. That is, pushing up the lower tool 219 for forming is equivalent to lowering the striker 225 with respect to the lower tool 219.
  • the striker 225 is vertically actuated by a hydraulic cylinder.
  • the disc support 223 is secured to the base 203 in the working area and the thickness of the side walls 223a, 223b is determined so that the cross-sectional area is greater than the predetermined area subject to pressure. Accordingly, the upper turret 221 is reliably supported during striking. Further, since the position of the lower tool is not changed with respect to the upper turret 215 and the upper tools 211, 213, high-precision processing can be achieved.
  • the upper and lower turrets 215, 221 are provided with tools for punching and forming, thus the tools can be readily changed only by rotating the turrets 215, 221.
  • the disc support 223 contains the movable block 271 having the press cylinder 279 to push up the lower tool 219, and the through hole 277 through which punched scraps are discharged. This means that the disc support 223 functions as both a support for the lower turret and a push-up means for the lower tool. If a support for the lower turret and a push-up means for the lower tool were provided separately, a changing operation would be required. According to the invention, however, punching and forming can be performed without such a changing operation.
  • the workpiece W can be processed without damage since the lower tool 219 for the forming, is normally below the path line PL and therefore does not interfere with the positioning operation of the workpiece W.
  • the turrets rotate after positioning the workpiece W in the working area, the workpiece W does not interfere with the lower tool for forming. Accordingly, the workpiece remains level, thus the workpiece W is properly processed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP19920403431 1991-12-16 1992-12-16 Revolverstanzmaschine Expired - Lifetime EP0555604B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95114957A EP0694347B1 (de) 1991-12-16 1992-12-16 Revolverstanzmaschine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US807586 1991-12-16
US07/807,586 US5177843A (en) 1991-12-16 1991-12-16 Turret punch press
US838867 1992-02-21
US07/838,867 US5184498A (en) 1992-02-21 1992-02-21 Turret punch press

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP95114957A Division-Into EP0694347B1 (de) 1991-12-16 1992-12-16 Revolverstanzmaschine
EP95114957A Division EP0694347B1 (de) 1991-12-16 1992-12-16 Revolverstanzmaschine

Publications (3)

Publication Number Publication Date
EP0555604A2 true EP0555604A2 (de) 1993-08-18
EP0555604A3 EP0555604A3 (en) 1993-12-22
EP0555604B1 EP0555604B1 (de) 1996-04-24

Family

ID=27123030

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19920403431 Expired - Lifetime EP0555604B1 (de) 1991-12-16 1992-12-16 Revolverstanzmaschine
EP95114957A Expired - Lifetime EP0694347B1 (de) 1991-12-16 1992-12-16 Revolverstanzmaschine

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP95114957A Expired - Lifetime EP0694347B1 (de) 1991-12-16 1992-12-16 Revolverstanzmaschine

Country Status (4)

Country Link
EP (2) EP0555604B1 (de)
CA (1) CA2085545A1 (de)
DE (2) DE69231504T2 (de)
FI (2) FI106187B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024445A1 (en) * 1995-02-06 1996-08-15 Amada Company, Ltd. Bending apparatus for metal sheets
WO1996024447A1 (en) * 1995-02-06 1996-08-15 Amada Company, Ltd. Method and machine for the production of sheet metal panels
US8499668B2 (en) 2008-10-20 2013-08-06 TRIUMPF Werkzeugmaschinen GmbH + Co. KG Discharging workpiece parts
CN112808915A (zh) * 2020-12-23 2021-05-18 朱丰利 一种可连续撞击的液压锻造机
CN114951072A (zh) * 2022-06-21 2022-08-30 刘博� 一种冲压拉延模具
CN115555453A (zh) * 2022-11-04 2023-01-03 武汉聚鹏精密制造有限责任公司 一种汽车冲压件生产用冲压装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581435A (en) * 1948-03-31 1952-01-08 Nowak Alois Karl Press with mechanical drive having harmonic motion and hydraulic transmission
US3005404A (en) * 1959-09-01 1961-10-24 Tucker & Sons Hydraulic connecting unit for punch-press rams
US3685380A (en) * 1971-02-19 1972-08-22 Amada Ltd Us Multi-track turret and overload protection
US4615204A (en) * 1983-12-28 1986-10-07 Nissan Motor Company, Ltd. Drawing apparatus of the double action and lower punch slide type
WO1990005601A1 (en) * 1988-11-18 1990-05-31 Amada Company, Limited Turret punch press

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581435A (en) * 1948-03-31 1952-01-08 Nowak Alois Karl Press with mechanical drive having harmonic motion and hydraulic transmission
US3005404A (en) * 1959-09-01 1961-10-24 Tucker & Sons Hydraulic connecting unit for punch-press rams
US3685380A (en) * 1971-02-19 1972-08-22 Amada Ltd Us Multi-track turret and overload protection
US4615204A (en) * 1983-12-28 1986-10-07 Nissan Motor Company, Ltd. Drawing apparatus of the double action and lower punch slide type
WO1990005601A1 (en) * 1988-11-18 1990-05-31 Amada Company, Limited Turret punch press

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996024445A1 (en) * 1995-02-06 1996-08-15 Amada Company, Ltd. Bending apparatus for metal sheets
WO1996024447A1 (en) * 1995-02-06 1996-08-15 Amada Company, Ltd. Method and machine for the production of sheet metal panels
US8499668B2 (en) 2008-10-20 2013-08-06 TRIUMPF Werkzeugmaschinen GmbH + Co. KG Discharging workpiece parts
CN112808915A (zh) * 2020-12-23 2021-05-18 朱丰利 一种可连续撞击的液压锻造机
CN114951072A (zh) * 2022-06-21 2022-08-30 刘博� 一种冲压拉延模具
CN114951072B (zh) * 2022-06-21 2023-08-01 广东天众模具科技有限公司 一种冲压拉延模具
CN115555453A (zh) * 2022-11-04 2023-01-03 武汉聚鹏精密制造有限责任公司 一种汽车冲压件生产用冲压装置

Also Published As

Publication number Publication date
DE69231504T2 (de) 2001-05-10
FI106187B (fi) 2000-12-15
FI112452B (fi) 2003-12-15
DE69210210T2 (de) 1996-10-31
FI925689A (fi) 1993-06-17
FI20001969A (fi) 2000-09-06
DE69210210D1 (de) 1996-05-30
EP0555604B1 (de) 1996-04-24
EP0694347A1 (de) 1996-01-31
DE69231504D1 (de) 2000-11-16
FI925689A0 (fi) 1992-12-15
EP0694347B1 (de) 2000-10-11
EP0555604A3 (en) 1993-12-22
CA2085545A1 (en) 1993-06-17

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