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
  • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
  • B21D5/002—Positioning devices

Definitions

• the invention relates to a stop device, as described in the preamble of claim 1.
• a stop device as a backgauge of a manufacturing facility for bending workpieces made of blanks, in particular sheet metal blanks, known in a finger carrier a linear in a direction perpendicular to a bending plane adjustable stop finger superimposed, which against the action of a spring assembly during feeding one of the bending deformation to be subjected to work part from a rest position is adjusted in a limited by a fixed stop stop position.
• the occupied stop position is monitored and released via a control signal a program flow for the forming process.
• a method and a device is known as a backgauge of a press brake for an automated feeding of a workpiece to be subjected to a bending deformation between bending tools.
• stop fingers projecting in the direction of the bending plane are arranged independently of one another on a bending plane predetermined by the bending tools, on a pivotable angle lever on an axis running perpendicularly to a contact surface of the bending press, one on the Stop finger pivotal movement causing stop force by means of force measuring sensor is measured and carried out by evaluating the measurement result in a control and regulating an end position of the workpiece with respect to the bending plane.
• the object of the invention is to provide a stop device for a bending press, in particular a press brake, for positioning a workpiece to be reshaped between bending tools, in which an adjusting resistance of a stop element can be changed as a function of the part parameters.
• FIG. 1 shows a stop device according to the invention, cut according to the lines I-I in Figure 2;
• FIG. 2 shows the stop device, cut along the lines H-II in FIG. 1;
• FIG. 3 shows another embodiment of the stop device in plan view
• FIG. 5 shows the stop device, cut along the lines V-V in Fig. 3.
• Fig. 6 shows a further embodiment of the stop device, cut.
• abutment device 1 for positioning a, by a bending deformation between each other, in a table beam 2 and a relative to this adjustable bending beam 3 arranged bending tools 4, 5 to be reshaped workpiece 6, in a not further shown Press brake, shown.
• the stop device 1 forms a so-called backgauge which, in the direction of insertion of the workpiece 6 - according to arrow 7 - is adjustable behind a bending plane 8 determined by the position of the bending tools 4, 5 in a press room 9, preferably in three spatial directions - double arrow 10 is arranged.
• the stopper 1 can be adjusted according to a placement of the table beam 2 and 3 bending beam in the required position with not shown for the adjustment drive devices and control means are provided and the positioning is often done automatically over program flow for each j eden different bending process.
• the stop device 1 consists of a movable on a linear guide 12 Antschtragschlitten 13 on which a stop support 14 is mounted protruding ausragend in the direction of the bending plane 8 and in a linear guide assembly 15, a stop member 16 in a plane perpendicular to the bending plane 8 - according to double arrow 17th - Between one, limited by a stop means 18 front rest position and adjustable by a stop means 19 limited rear stop position stores.
• the stop member 15 after inserting the workpiece 6 against the action of a spring assembly formed by a compression spring 21, in its stop position to stop the stop means 19, which forms an adjustable fixed stop.
• the workpiece 6 is pressed during the insertion process against a contact surface 22 of the stop element 15 with an end face 23 until the stop position is reached.
• the end face 23 is thus aligned exactly in a stop plane 24 running parallel to the bending plane 8 in order to execute the bending deformation on the work piece 6 exactly parallel to the end face 23.
• One of the bending plane 8 facing end portion 25 of the stop element 15 is stepped stepped, whereby a perpendicular to the bending plane 8 aligned bearing surface 26 is formed on the stop element 15.
• the bending plane 8 closer contact surface 25 is formed for a striking of the workpiece 6, which is used when the end face 23, the bending tool 4 only slightly surmounted.
• the stop carrier 14 has in a recess formed between the guide assemblies 16 a sensing element 27, e.g. a proximity sensor, which faces an end face 28 of an end face 29 of a base part 30 of the stop element 15 and is adjusted so that the assumed stop position of the stop element 15 is detected.
• a sensing element 27 e.g. a proximity sensor, which faces an end face 28 of an end face 29 of a base part 30 of the stop element 15 and is adjusted so that the assumed stop position of the stop element 15 is detected.
• the sensor element 27 in the direction of adjustability according to - double arrow 15 - of the stop element 15 on the stop carrier 14 adjustably attached.
• a retaining device 31 consisting of a solenoid 33, which can be acted upon by an energy source 32 with electrical energy, is arranged with a bolt-shaped coil armature core 34, which projects through the magnet coil 33 in a bore 36 with a cylindrical pin 37 and with one, the base part 30 of the stop element 15 has a cooperating with the end face 29 printhead 38.
• the cylinder pin 37 is surrounded by the biased compression spring 20, whereby the stopper member 15 in the idle state in a forward, i. the bending plane 8 facing rest position is positioned.
• the cylindrical pin 37 has at a the print head 38 opposite end 39 has a support flange 40 on which, as soon as a magnetic field is applied to an end face 41 of the solenoid coil 33 and thus in dependence of a magnetic field strength a variable resistance movement of the coil armature core 34 and so that a movement of the stop element 15 sets against.
• the cylindrical pin 37 superior annular surface a Abstüt- tion of the coil armature core 34 on the end face 41 of the solenoid coil 33 and thus determines an adjustment of the stop member 15 on the fixed front end position due to the action of the compression spring 20 in addition to the stop means 18.
• the retainer 31 formed by the solenoid coil 33 and the coil anchors 37 can now on the one hand, a stop movement of the stop element - according to arrow 42 - opposing resistance by the biasing force of the compression spring 20 and additionally if necessary by applying the solenoid coil 33 with power from the power source 32 are regulated, the magnetic field strength is regulated by changing the current or the voltage.
• Workpiece 6 comes with its end face 23 on the contact surface 22, even with a heavy work piece 6 or at a high coefficient of friction due to a rough surface of the workpiece, effectively prevented.
• light workpieces, or workpieces with lubricious surfaces in particular thin, bare sheets subjected to a bending process can be dispensed with the effect of the retainer.
• the abutment device described is used as a so-called “fixed stop” for aligning the end face 23 of the workpiece 6 in accordance with an "X-axis” application wherein the stop element 15 is adjusted in the stop position against the stop means, in which a provided distance 43 of Bending plane 8 is reached by the stop plane 24.
• This is monitored by the sensor element 27 on the detection of the reached stop position of the stop element 15, a control signal to a control device of the press brake to initiate the forming process by driving drive means of the press brake is started.
• a distance 44 between the stop plane in the retracted state of the stop element 15 and a longitudinal center Axis of the linear guide 12 has a structurally predetermined amount, the linear guide 12, the stop carrier sledge 13 is adjustable - according to double arrow 10 - is arranged in the direction perpendicular to the bending plane 8 direction - according to arrow 10th
• a further embodiment of a fixed stop 47 between the stop element 15 and the stop carrier 14 is shown in broken lines, which is formed by a finger portion 48 of the stop member 15 has a greater width 49 than a width 50 of the stop carrier 14, whereby opposite end faces 51, 52 of the finger region 48 and the stop carrier 14 form this fixed stop 47, which is not adjustable in this ge Stand- shown embodiment, in contrast to the previously described embodiment with the fixed stop 19.
• the abutment device 1 described above is used in pairs for workpieces 6 with a larger expansion on the press brake, in order to achieve a greater span between the abutment elements 15.
• the sensor elements 27 of mutually parallel stop devices 1 for a final adjustment of the workpiece 6, for example on a gripper head handling axis for positioning the end face 23 of the workpiece 6 are exactly parallel to the bending plane 8 is the end face 23 in an inclined position to If the bending plane 8 moves in relation to the end stop, for example, only one sensor element 27 sends a signal to the control device of the press brake and the position is corrected by a rotary movement of the gripper head until a signal from the sensor element 27 of the further stop device 1 takes place. If this state is reached, the delivery is in the direction of the "X-axis" to end stop.
• FIGS. 3 to 5 show a further embodiment of the stop device 1 according to the invention.
• the stop device 1 is for the positioning of the workpiece 3 in two mutually perpendicular directions in space, as they are commonly referred to as "X-axis" and "Z-axis" provided.
• the finger region 48 of the stop element 15 is designed as a double finger 54. This allows abutment of the workpiece 6 on a projecting finger 55 with a transverse edge 56 and with a longitudinal edge edge 57 on another finger 58 with the fingers 55, 58 in a fixed dimensional relationship to each other.
• the stop element 15 In the direction of the X-axis is the stop element
• a linear guide member 59 e.g. Flat track, Gleit Operationss-, Rundstangen Operations- or recirculating ball guide element, etc. is formed, adjustable substantially in the plane perpendicular to the bending plane 8 direction. In the direction of the Z-axis is the adjustability by a bearing of the guide assembly
• a pivot axis 61 of the pivot bearing assembly 60 extends parallel to the bending plane 8 and perpendicular to the support surface 26 for the workpiece 6 in the finger region 48 of the stop element 15th
• the abutment position is predetermined by fixed stops 62 which can be adjusted, for example by limiting a guide length of the guide arrangement 16 or adjustable, e.g. can be formed by means of screws.
• feeler elements 27 e.g. Proximity sensors
• the retention device 31 In addition to the spring arrangement 21 formed by the compression spring 20, by which the stop element 15 is positioned in the rest position, and which effects a first adjustment resistance, the retention device 31 already described with reference to FIGS with the solenoid 33 and the coil armature core 34 provided.
• This consists of a, on the pivotable guide assembly 16 and a guide member 59 having pivot base 65, spring-loaded by a compression spring 66 an acting pressure pin 67, wherein the spring force of the compression spring 66 is adjustable by means of a set screw 68.
• this retainer 64 in tandem execution, can be used with two parallel pressure bolts 67 and one compression spring 66 in each case, whereby a multi-stage adjustment of the adjustment resistance is achieved, e.g. Three-stage when different strong compression springs are used.
• this described stop device with the stop possibility in two spatial directions, preferably in pairs for positioning of the workpiece 6 on a bending press used and that the positioning of the stop device is preferably automated.
• an alignment of the work piece 6 in the so-called Z axis is usually carried out only on one of the stop devices 1, both being used in the X axis and, with the measurement results of the sensor elements 27, an exact alignment of the work piece 6 with respect to a predetermined one
• Bending line which also does not necessarily have to run parallel to the bending plane 8, is achieved.
• FIG. 6 shows a further embodiment of the stop device 1, in which the restraining device 31 is actuated, for example, by a pressurizing medium, eg compressed air, pressurized oil, etc., preferably via a pressure regulating member 70 with variable pressure from a supply line 71 embodiment shown by a pressure cylinder is formed.
• the impression cylinder is fastened to the stop carrier 14 in the direction of action of the stop element 15 in parallel aligned direction of action and preferably has a continuous piston rod 73 on which the stop element 15 facing the print head 38 is provided.
• the piston rod 73 is provided with an adjusting nut 74 for the purpose of limiting the stroke.
• FIGS. 5 and 6 form the subject of independent solutions according to the invention.
• the relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures. Reference design

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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• 2006
  • 2006-07-25 AT AT0125906A patent/AT503790B1/de not_active IP Right Cessation
• 2007
  • 2007-07-24 EP EP07784589A patent/EP2043795B1/fr not_active Not-in-force
  • 2007-07-24 PL PL07784589T patent/PL2043795T3/pl unknown
  • 2007-07-24 US US12/375,066 patent/US8683835B2/en active Active
  • 2007-07-24 AT AT07784589T patent/ATE503597T1/de active
  • 2007-07-24 DE DE502007006846T patent/DE502007006846D1/de active Active
  • 2007-07-24 WO PCT/AT2007/000358 patent/WO2008011648A1/fr active Application Filing

Non-Patent Citations (1)

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