DE102017213811B4 - Tool tryout press and lifting frame - Google Patents

Abstract

Tool tryout press (1) - with a ram (2) that can be moved up and down; and- with a lifting frame (3)• which has two side walls (4, 5) which are arranged on a foundation plate (6) on both sides of the ram (2), characterized in that- the lifting frame (3) also has :• a column guide (7, 8) on each of the ram surfaces (9, 10) facing the side walls (4, 5), and• four synchronous cylinders (11, 12, 13, 14) whose piston rods (15, 16, 17 or 18) are fitted in corner regions (19, 20, 21 or 22) of the ram surfaces (9, 10) and their cylinder housings (23, 24, 25 or 26) are fastened to the respective associated side walls (4 or 5). .

Description

The invention relates to a tool tryout press according to the preamble of claim 1 and also to a lifting frame according to claim 10.

Such a tool tryout press, which is also simply called machining press, is from the DE 102 35 236 B4 known.

DE 10 2015 202 003 A1 relates to a processing press with a press frame and with a ram carrying an upper tool and a table supporting a lower tool, with a yoke being vertically movable in the press frame by means of lateral piston-cylinder units and being in contact with the ram and being between the yoke and at least one force transmission element is arranged on the tappet.

WO 2005/021 253 A2 shows a hydraulic press with a press frame consisting of two press end pieces and side stands and two rams that can be moved in the press frame. Also provided is a hydraulic cylinder unit for generating the pressing force and an electrohydraulic control system. A lockable ram can be moved in the closing direction of the press by means of suitable traversing devices in the frame and can be locked with the press frame in a preselected working position by positive and/or non-positive elements so that it can divert the reaction forces generated by the working ram into the press frame. The working ram is connected via at least one hydraulic cylinder unit to generate the nominal press force either with the adjacent press end piece or with the lockable ram.

Show further state of the art CN 206 749 131 U , DE 20 2012 100 785 U1 and DE 195 28 813 A1 .

• • Verschleiß
• • Schmierfilmdicke
• • geometrische Veränderung von Stößel und Rahmen beim Aufbringen der Presskraft
• • Wärmeverzug
• • Alterung der Schweißteile, und
• • Fertigungstoleranzen verändern.

In the case of processing presses that have a ram with the usual ram guide, the gap size can change

• • Wear and tear
• • Lubricating film thickness
• • Geometric changes in the ram and frame when the pressing force is applied
• • Thermal distortion
• • aging of welded parts, and
• • Change manufacturing tolerances.

This can then lead to positional deviations in the X, Y and especially in the Z direction when eccentric ram loads are applied, such as the displacement of gas springs or the application of forming forces.

It is therefore the object of the present invention to create a tool try-out press of the type specified in the preamble of claim 1, which enables the ram to be guided precisely in the X and Y directions, and in particular in the Z direction.

This problem is solved by the features of claim 1.

The tool tryout press according to the invention is characterized by a ram that can be moved up and down and is arranged and guided in a lifting frame.

The lifting frame according to the invention has two side walls (guide columns) which are arranged on a foundation plate on both sides of the ram.

Furthermore, the lifting frame has a column guide on each narrow side of the ram, i.e. two column guides that fix the ram exactly in the X and Y directions.

Furthermore, the lifting frame according to the invention has four synchronized cylinders (hydraulic cylinders) whose piston rods are attached in corner regions of the sides or side surfaces of the ram pointing to the side cheeks and whose cylinder housings are fastened in pairs on the associated side cheeks.

1. 1. Freier Fall - Genauigkeit: Abweichungen ca. +/- 1 mm.
2. 2. Schnellhub zwischen 10 und 100 mm/s bei +/- 0,1 mm Abweichung.
3. 3. Feinhub bei 0 bis 10 mm über ein separates Servoventil, wobei in diesem Falle die Genauigkeit bei +/- 0,01 mm liegt.

The synchronization cylinders ensure synchronization in the z-direction, with a device control or device regulation being designed in such a way that deviations in ms can be corrected and thus a positional accuracy in the range of 1/100 mm can be achieved. A computer and servo valves ensure that there is always full pressure in the hydraulic cylinders, so that the oil columns are very stiff. This makes it possible to realize three speed ranges:

1. 1. Free fall - accuracy: deviations approx. +/- 1 mm.
2. 2. Rapid stroke between 10 and 100 mm/s with a deviation of +/- 0.1 mm.
3. 3. Precision stroke from 0 to 10 mm via a separate servo valve, with an accuracy of +/- 0.01 mm in this case.

For example, using a handwheel as an actuating element, a desired position can be reached exactly until the maximum pressing force is reached. Achieved one of Hydraulic cylinders (synchronous cylinders) in this area, all cylinders hold this position.

With this system it is possible to pin the ram in all height positions.

The dependent claims relate to advantageous developments of the invention.

Each column guide preferably has a guide rod fixed in the lifting frame, usually with a circular-cylindrical cross-section, which is passed through a guide plate fixed on the side of the ram facing the side walls, which has a guide recess for this purpose. The side or surface of the ram facing the side cheeks is usually the narrow side of the ram.

To fasten the free ends of the piston rods of the four synchronous cylinders, holding lugs are provided, which are arranged in the corner areas of the sides or surfaces of the ram, which are opposite the side cheeks.

Furthermore, the tool try-out press according to the invention preferably has a carriage which is movably mounted on the foundation plate, for which purpose two guideways arranged at a distance from one another are preferably provided.

In this way, the carriage can be moved under the ram and also moved away from the ram area on the foundation plate.

A lower tool can be arranged on the carriage, while the ram can be provided with an upper tool.

In this regard, on the DE 102 35 236 B4 Reference is made to the disclosure content of which is hereby incorporated in its entirety into the disclosure content of the present application.

It is also possible for the carriage to be movable on a chassis that can be lowered.

• 1 eine schematisch leicht vereinfachte Perspektivische Darstellung einer erfindungsgemäßen Werkzeugeinarbeitungspresse (Bearbeitungspresse) mit angehobenem Stößel und ausgefahrenem Wagen,
• 2 eine der 1 entsprechende Darstellung mit eingefahrenem Wagen und abgesenktem Stößel,
• 3 eine perspektivische Detaildarstellung eines Stößels der in den 1 und 2 dargestellten Werkzeugeinarbeitungspresse,
• 4 - 6 weitere Detaildarstellungen des Stößels in unterschiedlichen Ansichten, und
• 7 ein Hydraulikschema für die erfindungsgemäße Werkzeugeinarbeitungspresse.

Further details, features and advantages of the invention result from the following description of an exemplary embodiment with reference to the drawings. In it shows

• 1 a schematic, slightly simplified perspective view of a tool tryout press (machining press) according to the invention with the ram raised and the carriage extended,
• 2 one of the 1 corresponding representation with retracted carriage and lowered ram,
• 3 a perspective detail view of a plunger in the 1 and 2 shown tool trial press,
• 4 - 6 further detailed representations of the ram in different views, and
• 7 a hydraulic scheme for the tool tryout press according to the invention.

From a synopsis of 1 and 2 This results in the basic components of an embodiment of a tool tryout press 1 according to the invention, which is referred to below as “machining press 1”.

The machining press 1 accordingly has a ram 2 that can be moved up and down, the ram movement being indicated by the double arrow P in 1 is symbolized.

The processing press 1 also has a lifting frame, which is identified by the reference number 3 in its entirety.

The lifting frame 3 has two spaced apart side walls 4, 5, which can also be referred to as guide columns.

The side walls 4 and 5 are attached to a foundation plate 6 on both sides of the ram, the distance between the side walls 4, 5 resulting from the width of the ram 2.

The lifting frame 3 also has two column guides 7 and 8, the structure and arrangement of which can be seen in particular from a synopsis of the 3 until 6 results. These are discussed in detail below.

The 1 and 2 also make it clear that the lifting frame 3 of the machining press 1 according to the invention also has four synchronized cylinders (hydraulic cylinders) 11, 12, 13 and 14. The synchronous cylinders 11 to 14 have piston rods 15, 16, 17 and 18, respectively. Furthermore, the synchronous cylinders 11 to 14 have cylinder housings 23, 24, 25 and 26, respectively, which are arranged in the end regions of two crossbeams 40 and 41, respectively, of the side walls 4 and 5, respectively.

The 1 and 2 also illustrate a movable carriage 37, which is arranged to be movable on the foundation plate 6, for which purpose guideways 42, 43 can be provided.

In the example shown, a lower tool 39 is arranged on the carriage 37 .

To further explain the invention, particular attention is given below to the 3 until 6 referenced.

A synopsis of these figures shows that the piston rods 15, 16, 17, 18 of the synchronous cylinders 11, 12, 13 and 14 are arranged opposite one another via retaining brackets 33, 34, 35, 36 in corner areas 19, 20, 21 and 22, respectively Pages or surfaces 9, 10 de ram 2 are arranged. As can be seen from a synopsis of the 3 until 6 results, it is in these pages to the narrow sides or faces that in the assembled state according to 1 and 2 point to the two side panels 4 and 5, respectively.

The ram 2 is also guided in the X and Y directions via the aforementioned column guides 7, 8. Each of these column guides 7 and 8 has a guide rod 27 or 28 fixed in the lifting frame 3 . These guide rods 27 and 28 pass through recesses in guide plates 29' and 30', which are fixed between the holding tabs 33 and 34 and 35 and 36 on the narrow sides 9 and 10, respectively. The ram 2 is securely guided during its up and down movement P along these guide rods 27 and 28, respectively.

How in particular 5 clarifies, the retaining tabs 33, 34, 35 and 36 are each arranged in the corner areas 19, 20, 21 and 22 and the guide plates 29' and 30' are preferably in the middle, i.e. on the in 5 Drawn longitudinal center line L arranged.

In 6 is schematically illustrated in a highly simplified manner as a block 38 an upper tool which can be arranged on the underside of the ram 2, ie pointing to the lower tool 39.

7 shows a hydraulic scheme or hydraulic diagram, the components of which can be used in the tool tryout press according to the invention.

The aim of the circuit diagram represented by reference number 53 in its entirety is that a valve combination is provided for each of the three speed ranges mentioned at the outset: “free fall”, “rapid lift”, “fine lift”, which is adapted to the respective speed range and the permissible deviations required there tuned (the slower, the more accurate).

All three valve combinations meet press safety regulations.

In detail, the circuit diagram 53 shows a double-acting hydraulic cylinder 44, a hydraulic control block 45, a linear displacement measuring system 46a, 46b, a fall protection device 47, pressure sensors 48a, 48b, an anti-cavitation valve 49, an oil tank 50, a controller 51 with PLC (programmable logic controller Control), display and control panel, a hydraulic pump 52 with a motor M.

The hydraulic cylinder 44 is connected to the oil tank 50 via a hydraulic line H1. The hydraulic pump 52 delivers hydraulic fluid from the oil tank 50 via a hydraulic line H2 to the hydraulic control block 45, which is connected to the hydraulic cylinder 44 via hydraulic lines H3 and H4, with the hydraulic lines H3 and H4 each opening on one side of a cylinder piston 54.

The hydraulic lines H3 and H4 are monitored by the pressure sensors 48a, 48b, which have a signal or operative connection with the controller 51 via data transfer lines L2, L3.

The suction valve 49, which is arranged in the hydraulic line H1, is connected to the hydraulic control block 45 via a data transfer line L1.

The fall protection device 47 is signal-connected to the hydraulic cylinder 44 via a data transfer line L4 and to the control block 2 via a data transfer line L5.

Furthermore, a data transfer line L8 is provided between the hydraulic control block 45 and the controller 51, which in turn is operatively connected to the linear displacement measuring system 46a, 46b via data transfer lines or signal lines L6, L7.

In addition to the above written description of the invention, reference is hereby explicitly made to the graphic representation of the invention in FIGS 1 until 7 referenced.

Reference List

1

Tool tryout press (machining press)

2

pestle

3

lifting frame

4, 5

side walls (guide pillars)

6

foundation plate

7.8

column guides

9, 10

Ram narrow sides / faces

11 - 14

synchronous cylinder

15 - 18

piston rods

19 - 22

corner areas

23 - 26

cylinder body

27, 28

guide rod

29`, 30`

guide plate

29 - 32

free ends

33 - 36

retaining tabs

37

Car

38

upper tool

39

lower tool

40, 41

cross member

42, 43

guideways

44

hydraulic cylinder

45

hydraulic control block

46a, 46b

Linear displacement encoder

47

fall protection

48a, 48b

pressure sensors

49

anti-cavitation valve

50

oil tank

51

controller

52

hydraulic pump

53

circuit diagram

54

cylinder piston

L

Longitudinal center line of the ram 2

M

engine

P

Direction of movement of the ram 2

Claims (10)

Tool tryout press (1) - with a ram (2) that can be moved up and down; and - with a lifting frame (3), • which has two side walls (4, 5) which are arranged on a foundation plate (6) on both sides of the ram (2), characterized in that - that the lifting frame (3) also has : • a column guide (7, 8) on each of the ram surfaces (9, 10) facing the side walls (4, 5), and • four synchronous cylinders (11, 12, 13, 14) whose piston rods (15, 16, 17 or 18) are fitted in corner regions (19, 20, 21 or 22) of the ram surfaces (9, 10) and their cylinder housings (23, 24, 25 or 26) are fastened to the associated side walls (4 or 5). . tool try-out press claim 1 , characterized in that each column guide (7, 8) has a guide rod (27 or 28) fixed in the lifting frame (3) which passes through a guide plate (29' or 30') fixed to the ram surfaces (9, 10). is. tool try-out press claim 1 or 2 , characterized in that the piston rods (15 to 18) are fixed with their free ends (29, 30, 31 or 32) to retaining brackets (33, 34, 35 or 36) which are in the corner areas (19 to 22) of the plunger (2) are arranged. Tool trial press according to one of Claims 1 until 3 , characterized in that a carriage (37) which can be displaced under the ram (2) is movably mounted on the foundation plate (6). Tool trial press according to one of Claims 1 until 4 , characterized in that an upper tool (38) can be fixed on the ram (2). tool try-out press claim 4 or 4 , characterized in that a lower tool (39) can be fixed on the carriage (37). Tool trial press according to one of Claims 4 until 6 , characterized in that the carriage (37) can be moved on a lowerable chassis. Tool trial press according to one of Claims 1 until 7 , characterized by a control or regulation for the adjustment of position deviations. tool try-out press claim 8 , characterized in that the control or regulation has a computer and via this actuated servo valves to maintain a full pressure in the synchronous cylinder (11 to 14). lifting frame (3) - with two spaced apart side walls (4, 5) which are arranged on a foundation plate (6), - with two column guides (7, 8) and - with four synchronized cylinders (11 to 14), which have piston rods (15 to 18) for fastening in corner areas (19 to 22) of ram surfaces (9, 10) and whose cylinder housings (23 to 26) are mounted on the associated side walls (4 or 5) are fixed.

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