DE10013505A1 - Workpiece machining or deforming device has C-shaped mounting consisting of lower and upper crossheads able to turn in enclosing frame - Google Patents

Abstract

The machining or deforming device consists of a C-shaped mounting with a table at the front open side and a vertical carrier for the workpiece. The mounting (2) consists of lower and upper crossheads (6, 7), which are able to turn in an enclosing frame (8). The web (9) of the C-mounting is formed by a hydraulic cylinder (10).

Description

The invention relates to a device for Machining or forming workpieces, consisting of a C- shaped frame, on the front open side of a table and a vertical traversing device with a tool is provided.

Such devices are for example as presses or the like. known. Other machines are also in the so-called C- Construction known. All of these devices and machines have the disadvantage that their C-shaped frames at Machining or reshaping workpieces in the area bends open front sides. This bend up is generally very undesirable as this leads to stress as well Bends on guides and Like. And thus to inaccuracies on Workpiece leads.

The invention is therefore based on the object To create device of the type specified, in which a Bending of the C-shaped frame is largely avoided.

This object is achieved by the Characteristic features of claim 1 solved.

Appropriate developments of the invention are in the Subclaims marked.  

By designing the web of the C-shaped frame as Hydraulic cylinder and the pivotable bearing at least the upper crosshead of the device can the force that For example, in the case of hydroforming on the front open one Side of the C-shaped frame acts, can be counteracted, so that there is no bending of the frame. The lower one Crosshead and frame enclosing the upper crosshead supports this.

By arranging at least one hydraulic cylinder only as a rapid traverse cylinder, it is possible that the same one has a smaller cross section than a hydraulic cylinder with two Functions, namely rapid traverse and locking. The relatively small hydraulic cylinder in the area of the web of the C- shaped frame, which take on the function of locking, enable enormous cost savings, since so-called Standard cylinders can be used.

In addition, there are significantly less costs for one Hydraulic unit, because for the aforementioned cylinders much less power is necessary.

Depending on the tool, it is with the invention Device possible by the number of hydraulic cylinders in the Area of the web of the C-shaped frame as well as the individual Control or regulation of the hydraulic cylinder Locking forces vary on the same, the pressure control is very dynamic due to the small amount of oil.

An embodiment of the device according to the invention is subsequently based on one in the drawing, for example in Side view (partly cut) shown press described.  

The device 1 for machining or forming workpieces shown in the figures essentially consists of a C-shaped frame 2 , on the front open side 3 of which a table 4 and a vertical displacement device 5 are provided.

The C-shaped frame 2 consists of a lower crosshead 6 and an upper crosshead 7 , which are pivotably mounted in a frame 8 enclosing the same, at least the surface of the frame 8 in contact with the upper crosshead 7 being curved. The web 9 of the C-shaped frame 2 is formed by hydraulic cylinders 10 , which are preferably designed as short-stroke cylinders and, after closing a locking device 11, hold a tool carrier 12 of the displacement device 5 in its closed position, ie they counteract the force during the forming. For this purpose, the upper crosshead 7 pivots about a pivot point 13 . The ratio of the center distance 14 of the moving device 5 to the pivot axis 15 of the upper crosshead 7 and the center distance 16 of the hydraulic cylinders 10 to the pivot axis 15 of the upper crosshead 7 is preferably 1: 2, whereby the hydraulic cylinders 10 can be chosen much smaller in their design.

The displacement device 5 is formed from at least one further hydraulic cylinder 17 , on the lower end of which the tool carrier 12 is attached. This hydraulic cylinder 17 is only provided for the downward and upward movement in the rapid traverse of the tool carrier 12 .

The device 1 also has a locking device 11 which locks the tool carrier 12 in its lowermost position, ie in the position in which the tool 18 is closed for the forming process by means of the hydraulic cylinder 17 . In this exemplary embodiment, this locking device 11 essentially consists of a horizontally displaceable hydraulic cylinder 20 , at the front end of which an intermediate piece 21 which can be inserted between the tool carrier 12 and the upper crosshead 7 is provided.

Each hydraulic cylinder 10 , the number of which can be selected in accordance with special requirements, can be subjected to different pressures, since the hydraulic cylinders 10 can be controlled individually. Depending on the tool, this may be necessary if different locking forces are required in certain areas of the same.

The number of lower and upper crossheads 6 , 7 and frame 8 can also be changed depending on the size of the workpiece, the table 4 running in one piece over all lower crossheads or their entire width.

reference numeral

1

contraption

2

C-shaped frame from

1

3

front open side of

2

4

Table by

1

5

vertical moving device from

1

6

lower crosshead of

2

7

upper crosshead of

2

8th

Frame around

2

9

Footbridge of

2

10

Hydraulic cylinder between

6

and

7

11

locking device

12

Tool carrier from

5

on

17

13

Pivot point of

7

in

8th

14

Center distance of

5

to

15

15

Swivel axis of

7

16

Center distance of

10

to

15

17

Hydraulic cylinders from

5

18

Tool

19

-

20

Hydraulic cylinders from

19

21

Adapter

20

Claims (6)

1. A device for machining or forming workpieces, consisting of a C-shaped frame, on the front open side of which a table and a vertical moving device with a tool is provided, characterized in that the C-shaped frame ( 2 ) consists of a lower crosshead ( 6 ) and an upper crosshead ( 7 ) which are pivotally mounted in a frame ( 8 ) enclosing the same, and that the web ( 9 ) of the C-shaped frame ( 2 ) is formed by hydraulic cylinders ( 10 ). 2. Device according to claim 1, characterized in that at least the surface of the frame ( 13 ) which is in contact with the upper crosshead ( 7 ) is curved. 3. Apparatus according to claim 1 or 2, characterized in that the ratio of the center distance ( 14 ) of the displacement device ( 5 ) to the pivot axis ( 15 ) of the upper crosshead ( 7 ) and the center distance ( 16 ) of the hydraulic cylinder ( 10 ) of the web ( 9 ) of the C-shaped frame ( 2 ) to the pivot axis ( 15 ) of the upper crosshead ( 7 ) is 1: 2. 4. Device according to one of claims 1 to 3, characterized in that the displacement device ( 5 ) is formed from at least one further hydraulic cylinder ( 17 ), at the lower end of which a tool carrier ( 12 ) is attached. 5. Device according to one of claims 1 to 4, characterized in that a locking device ( 11 ) is provided which detects the tool carrier ( 12 ) in its lowest position. 6. The device according to claim 5, characterized in that the locking device ( 11 ) consists essentially of a horizontally movable hydraulic cylinder ( 20 ), at the front end of a between the tool carrier ( 12 ) and the upper crosshead ( 7 ) retractable intermediate piece ( 21 ) is provided is.