EP0206187B1 - Stempel-Abtastvorrichtung an einer Quertransportpresse - Google Patents

Stempel-Abtastvorrichtung an einer Quertransportpresse Download PDF

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Publication number
EP0206187B1
EP0206187B1 EP86108164A EP86108164A EP0206187B1 EP 0206187 B1 EP0206187 B1 EP 0206187B1 EP 86108164 A EP86108164 A EP 86108164A EP 86108164 A EP86108164 A EP 86108164A EP 0206187 B1 EP0206187 B1 EP 0206187B1
Authority
EP
European Patent Office
Prior art keywords
sensor
punch
press
control lever
stamp
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.)
Expired
Application number
EP86108164A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0206187A1 (de
Inventor
Maffeo Massariolo
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.)
Hatebur Umformmaschinen AG
Original Assignee
Hatebur Umformmaschinen AG
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
Application filed by Hatebur Umformmaschinen AG filed Critical Hatebur Umformmaschinen AG
Priority to AT86108164T priority Critical patent/ATE42919T1/de
Publication of EP0206187A1 publication Critical patent/EP0206187A1/de
Application granted granted Critical
Publication of EP0206187B1 publication Critical patent/EP0206187B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J3/00—Lubricating during forging or pressing
    • 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
    • B21K29/00—Arrangements for heating or cooling during processing

Definitions

  • the invention relates to a cross transport press with a device according to the preamble of claim 1.
  • Such a device is used in a cross transport press to continuously monitor its operation and is intended, for example, to determine whether a part is stuck on a stamping tool after a machining operation has been carried out. If this is the case, the device switches off the press immediately so that a so-called “double loader w " does not occur when feeding a part to be subsequently machined. Furthermore, such a device can also be used to monitor the state of the stamping tool after each working stroke, With such control measures, the press and the tools are saved from further consequential damage after a single malfunction, for example caused by a broken stamp, and the production of unnecessary rejects is avoided Finally, the device can also be used for periodic cooling of the stamping tools.
  • a corresponding safety device is known from DE-C-2 907 464.
  • a scanning rocker rotatably mounted about a horizontal axis is driven in the work cycle of the press via a lever joint control such that it is in normal operation of the press between a scanning position in which the press slide is in its rear press slide position and a waiting position in one with respect to the Working area of the press above area is pivoted.
  • the scanning rocker carries stamp sensors assigned to the individual stamps, these are moved along with the corresponding pivoting and are moved past the front face of the respective stamp in the working position of the rocker. If there is still a part that has already been machined on the stamp, the corresponding stamp sensor hits it, causing a malfunction to be identified and the press to be put out of operation immediately.
  • the stamp end faces are cooled by means of cooling showers provided on the stamp sensors.
  • the coolant used for this is led through the tubular rocker arms to the individual cooling showers.
  • the scanning rocker can be swiveled up together with the plunger sensors by means of a piston-cylinder unit into a position above the pivoted working area during normal operation of the rocker, so that, for. B. a tool changeover can take place without hindrance by the safety device.
  • This known safety device can be used in forming machines with a C-body. If a metal-forming machine has a closed frame, there is relatively little space, especially in the scanning or sensing area, which does not allow the known safety device, which requires a relatively large swiveling area, to be accommodated. Also, the scanning rocker with the stamp sensors must always be shifted in a circular path around the rocker pivot axis, as a result of which the stamp sensors of the known device are fixed to a scanning curve, the adaptation of which to the stamp geometry and movement causes problems.
  • the scanning curve on which the stamp sensors are moved should run as flat and as close as possible to the end faces of the stamp so that there are no collisions between the stamp sensors and the stamps and / or the cross transport tongs can come. This requirement cannot be met satisfactorily even by modifying the known safety device, since conceptual limits are set by its operating principle.
  • the object of the invention is to provide a transverse transport press with a device of the type defined in the introduction, which, while avoiding the disadvantages of the known, has a scanning curve shape optimally adapted to the stamp movement and function with regard to the movement of the stamp sensor and, in the event of a malfunction, with minimal stress on tools and workpieces take effect immediately, whereby this device should be of simple construction and reliable in use in view of the limited space in the scanning or sensing area, and in which all functions can also be operated and controlled from a control desk located away from the press should.
  • the cross transport press has a device in which the stamp sensor movement is controlled by means of a parallel lever gear known per se (DE-AS-2 023 871).
  • the link lengths are approximately the same length in pairs, which is why they cause approximately parallel guidance of the central link to a connecting line laid by the pivot bearings of the two links in the bearing block arrangement over a certain pivoting range of the upper and lower links.
  • the drive linkage of the stamp sensor device designed in the manner described in the description thus requires an approximately rectilinear displacement of the stamp sensors, which are thus moved on a scanning curve which is so flat that the stamp sensors can be accommodated without hindrance even in the narrowest working areas of a forming machine.
  • scanning can be carried out extremely close to the respective stamp end faces, which enables reliable monitoring of the stamp contour.
  • the effectiveness of the cooling effect that can be achieved via the coolant showers can be decisively increased by the small distance that can be maintained when scanning to the stamp end faces.
  • each stamp sensor is provided with an actuating element for a switch which puts the machine out of operation in the event of a fault
  • an exact indication of the location of the fault can be achieved via the actuating elements to be set separately on each stamp, for example via an indicator lamp for each stamp sensor on a central control panel.
  • the actuating element is provided in the form of a transmission tube which is relatively displaceable on the plunger sensor and is spring-loaded in its pivoting direction into the scanning or sensing area and which cooperates with the switch for stopping the machine.
  • the resiliently preloaded design of the transmission tube means that when the plunger sensor hits a workpiece, only a small impact load is exerted on it and the entire drive linkage, so that the tool, workpiece and also the plunger sensor arrangement itself are subjected to minimal stress and can be practically undamaged .
  • the stamp contour can be checked after each press stroke, a change in the tool status can be indicated immediately and, if necessary, the machine can be stopped.
  • the stamp sensor swivel drive provided in the device according to the invention is used for remote-controlled swiveling up of the entire stamp sensor arrangement and thus for releasing the working area of the press for a necessary retrofitting or repair.
  • the bracket of the swivel drive is located approximately in the middle of the press above the press slide, and from there the drive engages the upper link of the drive linkage.
  • the swiveling drive is provided with drive means which can be operated remotely, so that swiveling up of the stamp sensor arrangement and subsequent lowering can also be included in the largely automated process of the press operation.
  • the arrangement of the swivel drive in the middle of the machine offers the advantage that no adverse torsion can act on the drive linkage.
  • a press slide 2 is slidably mounted in a press frame 3 and is periodically moved in the direction of the double arrow shown on the press slide by means of a drive, not shown.
  • four punches 1 are attached to the press slide 2, which, as indicated in FIG. 2, are provided with forming dies 36 which cooperate with the punches 1 in a known manner.
  • a punch drive is provided over the front end of the press slide 2, which is supported on a bearing block arrangement 15 attached to the press frame 3 and is inevitably actuated with the press slide movement via a lever control.
  • This lever control is formed from a mirror joint provided on both sides of the press slide, which is formed in each case from a coupling 7 and a pivot axis 6a engaging in a press slide attachment 6.
  • the couplers 7 are each connected to the handlebar section ends via a pivot bearing 37.
  • the stamp sensor arrangement 4 has a drive linkage which is formed from links coupled to a parallel lever transmission.
  • two two-part lower links 8, 11 are articulated in lower pivot bearings 14 on bearing blocks 15a, 15b which are aligned with one another and are arranged opposite one another on the press frame 3 with respect to the press slide 2.
  • the lower links 8, 11 are synchronously moved between the ones shown in FIG. 2 by the lever control 6, 6a, 7 about the lower pivot bearings 14 End swivel positions adjusted.
  • a sensor carrier 16 is pivotally mounted, which according to FIG.
  • stamps 1 carries a series of four adjacent stamp sensors 4, each of which is firmly connected to the sensor carrier 16 via a sensor holder 5 and Have sensor cams 19, the stamp sensors being oriented so as to protrude approximately perpendicular to the stamp displacement direction in the scanning or sensing area 9 of the press indicated in FIG. 2 between the stamps 1 and the forming dies 36.
  • the drive linkage consisting of the links 11, 12 and 13, is driven with a corresponding displacement of the press slide such that the links 11 and 13 are pivoted about their pivot bearings 14, 17 on the bearing block arrangement, whereas the center link 12, which Sensor carrier 16 and thus the stamp sensor 4 experience a parallel and approximately rectilinear displacement which is perpendicular to the stamp displacement direction and which is indicated by the vertical arrows in FIG. 2.
  • the upper illustration in FIG. 2 shows the punch 1 in a front press stroke end position, while the lower illustration schematically indicates the rear press stroke end position.
  • the stamp sensor 4 thus enters the scanning or sensing area 9 with the stamp 1 in the rear press stroke end position in order to be able to pass as close as possible to the stamp end face (cf. FIG. 3b).
  • the stamp sensor housing 39 which is connected to the sensor carrier 16 via a laterally projecting connecting tube 38, is hollow in its interior and has a transmission tube 24 enclosed by a spring 40 in its interior.
  • the transmission tube 24 is slidably sealed and has a lateral wall opening 41 which opens its interior towards the connecting tube 38.
  • 3a is screwed to the lower end of the transmission tube 24 according to FIG. 3a, which, as also shown in FIG. 3b, has a hollow housing section which is rectangular in cross section and tapered in a longitudinal section according to FIG. 3a.
  • This 3b has a multi-hole coolant outlet shower 21 through which coolant, through channels 23, through the connecting pipe 38, the transmission pipe 24 and the housing section, is supplied in the direction of the arrows shown in FIG. 3a and is sprayed onto the end face of the stamp sensor.
  • 3b shows sensor cams 19 mounted on the side of the stamp sensor, which are guided around the front part of the stamp on both sides thereof.
  • initiator 25 which monitors the surface and stamp contour properties and serves as an actuating element for stopping the machine if deviations from the stamp normal state are detected. The close encircling of the stamp front part visible in FIG.
  • stamp sensor 4 allows reliable scanning of even the smallest parts remaining on the stamp, as well as a correspondingly reliable sensing of the stamp contour for a perfect surface condition and also a narrow cooling space which allows a high cooling effect to be achieved.
  • Such a close approach of the stamp sensor 4 to the end face of the stamp can be achieved due to the described parallel guidance of the stamp sensor drive during normal operation of the press, since the scanning and sensing movement, as said, can be carried out almost linearly vertically to the stamp movement.
  • the transmission tube 24 At the upper end of the transmission tube 24 according to FIG. 3a there is an actuating element 20 which actuates a switch 10 when the transmission tube is moved upwards, which serves to switch off the machine. If there is still a workpiece or part of the workpiece on the stamp visible in FIG. 3b during the downward movement of the stamp sensor 4, the stamp sensor strikes this part with its cams 19 and as a result of the further downward movement forced by the drive linkage 11, 12, 13 of the plunger sensor, the transmission tube 24 moves against the preload by the spring 40 relative to the sensor housing 39, and after a path that can be preset on the actuating element 20, the switch 10 is actuated, which switches the machine to an immediate stop, i. H. Switching off and braking ensures.
  • the biasing force of the spring 40 is chosen so that with reliable preloading of the stamp sensor 4, the lowest possible load is exerted on the stamp 1 provided with a workpiece, as a result of which both the stamp and the entire stamp sensor drive are stressed as little as possible on impact.
  • the interior of the transmission tube 24 (FIG. 3a) is connected to the sensor carrier 16, which is also tubular and which is connected to a central coolant supply (not shown).
  • FIGS. 4 and 5 show a plunger sensor swivel drive 27, which is designed as a chain transmission and consists of a driver 29 acting on the upper link 13, a sprocket 30 seated on the swivel shaft 22, a hydraulic drive 31 connected to a second sprocket 32, and a roller chain 33 coupling both sprockets is formed. Due to the forced coupling between the press slide 2 and the lower links 11, the lever control 6, 6a, 7, it is necessary for the pivoting to temporarily cancel the drive effect.
  • the lower links 11 are divided into two link sections 8, 11 (FIG. 5b) which can be pivoted relative to one another on a pivot axis in the lower pivot bearing 14.
  • This lock 26 comprises a remote-controlled hydraulic piston-cylinder unit 34 attached to the handlebar section 8, which carries at its free piston end a latch 35 which engages in a correspondingly arranged on the handlebar portion 11a latch 42 and, as the lower figure in Fig. 5b shows , the two handlebar sections 8 and 11 locked together.
  • a spring 43 acting on the latch pawl 35 in the engagement direction is shown.
  • the piston-cylinder unit 34 is single-acting in this case, but it can also be designed as a double-acting unit, whereby the spring 43 could be omitted.
  • the ability to operate the piston-cylinder unit 34 remotely is of particular importance.
  • hydraulic lines, not shown, are connected, which can be operated from a central control panel, so that direct manipulation of the stamp sensor arrangement is not required for unlocking and locking the lower links 8/11.
  • a locking arrangement 28 shown in FIG. 5a is used, which is provided on the driver 29 and interacts with a locking cam 28b, which is fastened to the upper link 13.
  • the latch arrangement 28 has a ratchet latch 28a which is preloaded by a spring 28c in the direction of the latching cam 28b and which is supported to a limited extent on the driver 29.
  • the upper link 13 is held between the driver 29 and the latch bolt 28a.
  • the driver 29 bears against the lower edge of the upper link 13 in the course of pivoting upward, it takes it into its upward pivoting position and, when this is reached, the upper link 13, as can be seen from FIG hindered to the rear, so that the stamp sensor arrangement can reliably remain in the upward pivoting position shown in FIG. 4b.
  • the lower link sections 11 meet the stops 44 on the link sections 8 visible in FIG. 6 and thereby limit the pivoting back of the drive linkage.
  • the hydraulic cylinder 31 can also be operated remotely and is connected to the central control panel via control lines (not shown).
  • the control measures made possible by the hydraulic cylinder / piston units 34 and 31 allow the stamp sensor arrangement to be swiveled up and swung back in any position in the press slide, so that the stamp sensor arrangement can always be swiveled up in all possible malfunctions over an operational sequence and the work area can thus be exposed for the necessary measures for troubleshooting.
  • stamps are shown lying side by side, one stamp sensor being assigned a stamp sensor of the same type.
  • this arrangement can be deviated from, so that the stamp sensor arrangement can also be used for transverse transport presses with more or fewer stamps and can also be used with stamp sensors of different designs.
  • the last forming station in the manufacturing process could have a separating spade instead of a stamp sensor, which extends the channels of a correspondingly arranged drop chute in such a way that a finished part is always inserted into a dedicated channel of the drop chute.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Punching Or Piercing (AREA)
  • Forging (AREA)
EP86108164A 1985-06-24 1986-06-14 Stempel-Abtastvorrichtung an einer Quertransportpresse Expired EP0206187B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86108164T ATE42919T1 (de) 1985-06-24 1986-06-14 Stempel-abtastvorrichtung an einer quertransportpresse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2681/85 1985-06-24
CH268185 1985-06-24

Publications (2)

Publication Number Publication Date
EP0206187A1 EP0206187A1 (de) 1986-12-30
EP0206187B1 true EP0206187B1 (de) 1989-05-10

Family

ID=4239183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108164A Expired EP0206187B1 (de) 1985-06-24 1986-06-14 Stempel-Abtastvorrichtung an einer Quertransportpresse

Country Status (5)

Country Link
US (1) US4763501A (enrdf_load_stackoverflow)
EP (1) EP0206187B1 (enrdf_load_stackoverflow)
JP (1) JPS61296927A (enrdf_load_stackoverflow)
AT (1) ATE42919T1 (enrdf_load_stackoverflow)
DE (1) DE3663230D1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7784318B2 (en) * 2008-03-27 2010-08-31 National Machinery Llc Turned blank monitor
CN106694779A (zh) * 2017-03-22 2017-05-24 王安基 拖链支撑装置和锻造机冷却水输送系统

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1910681A (en) * 1929-01-04 1933-05-23 William C Dickson Detector mechanism for nail head capping machines
US2425438A (en) * 1944-06-15 1947-08-12 Remington Arms Co Inc Machine stop
US2699252A (en) * 1949-09-13 1955-01-11 Peerless Tube Company Apparatus for performing an operation upon failure of removal of a collapsible tube from an extruding plunger of an extruding machine
JPS50156711A (enrdf_load_stackoverflow) * 1974-06-11 1975-12-18
DE2613950A1 (de) * 1976-04-01 1977-10-06 Malmedie & Co Maschf Presse fuer die herstellung von innen-sechskantschrauben oder dergleichen mit einer einsenkung zu versehener werkstuecke
FR2356504A1 (fr) * 1976-06-29 1978-01-27 Centre Techn Ind Mecanique Dispositif automatique de lubrification et/ou de refroidissement de l'outillage superieur mobile d'une machine de matricage, d'estampage, ou d'emboutissage
GB1596641A (en) * 1977-02-25 1981-08-26 Avdel Ltd Fault detector for a metal-forming machine
DE2907464C2 (de) * 1979-02-26 1983-04-07 Hatebur Umformmaschinen AG, Basel Sicherheitseinrichtung zum periodischen Abtasten auf Anwesenheit eines Werkstückes von mindestens einem Stempel und zum Kühlen der Stirnfläche mindestens eines Stempels an einer automatischen Quertransportpresse zur Umformung von Metallteilen
US4308734A (en) * 1980-04-18 1982-01-05 Federal-Mogul Corporation Workpiece detection device for cyclical machines
JPS5923683B2 (ja) * 1980-09-03 1984-06-04 松下電器産業株式会社 金型装置

Also Published As

Publication number Publication date
ATE42919T1 (de) 1989-05-15
JPH0452164B2 (enrdf_load_stackoverflow) 1992-08-21
DE3663230D1 (en) 1989-06-15
US4763501A (en) 1988-08-16
JPS61296927A (ja) 1986-12-27
EP0206187A1 (de) 1986-12-30

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