JPH05123896A - Pressing device and flash butt welding machine provided with said pressing device - Google Patents

Abstract

PURPOSE: To obtain a pressure device surely capable of pressurizing in the axial direction by employing oppositely facing pressure units which are axially bonded in each of their rear ends to both leg sides of a C-frame and which moves along an axially parallel guide rail provided on the machine base. CONSTITUTION: Each rear end 15, 16 of the pressure units 3, 5 is axially bonded to both leg sides 18a, 18b of the C-frame 17a, 17b. The pressure unit 3 is fixedly installed on the machine base 1 with the axis held horizontally. The pressure unit 5 is set so as to make it movable along the guide rail 8a, 8b provided on the base 1 parallelly to the pressure axis. A workpiece is then attached to the pressure rod 11, 12. When a pressure is applied by a piston cylinder unit 13, the C-frames 18a, 18b supporting the welding force are spread apart, but the pressurization is made possible linearly in the direction of oppositely facing axes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a pressing device having two pressing rods which are respectively connected to both legs of a C-shaped force absorbing device and at least one of which can be fed by a driving device. Spark butt welder.

[0002]

2. Description of the Related Art When pressing a work part under a high pressure in a plane, for example, Doubel's "Machine Handbook", No. 1
4th edition, page S35, the pressing unit with the pressing rod on the O-shaped frame for absorbing the force from one pressing unit to the other is moved. It was This O-shaped mount makes it difficult to get close to the push rods and thus also the work piece part to be pushed between the push rods. To avoid these drawbacks, so-called C-shaped mounts were used, which were open on one side and thus allowed good access to the push rod. A pressing unit having a pressing rod was attached to each free leg of the C-shaped mount. Due to the high feed force during the pressing process, the C-shaped pedestal had to be made stronger than proportional to achieve the planar pressing of the workpiece part. This is because the entire C-shaped mount has been bent.

[0003]

SUMMARY OF THE INVENTION The problem underlying the invention is to provide a pressing device of the type mentioned at the outset, which enables a good, uniform surface pressing of the workpiece part. Is.

[0004]

This problem is that both pressing rods are articulated to both leg sides of the force absorbing device, and both pressing rods open to the support member and the C-shaped force absorbing device opens. Regardless, it is solved by being held in line with each other in the pressing direction. Preferred configurations are described in claims 2-8.

[0005]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show the basic construction of the pressing device. This pressing device can be used, for example, for uniform planar pressing of two workpiece parts. In addition to pressing the work part, the pressing device according to the present invention uses a punching machine, a milling machine, a pressing rod for plastically deforming the work, and the like in a direction perpendicular to the work surface under a high operating force. It can also be used to guide the workpiece surface without tilting. As a preferred embodiment, a spark butt welder with a pressing device according to the invention will be described with reference to FIGS.

The pressing device with two pressing units 3 and 5 shown in FIG. 1 has a mechanical mount 1 to which the pressing units 3 are fixedly connected. The pressing unit 5 is movably supported on two horizontal guide rails 8a and 8b attached to the machine mount 1, which extend in the feed direction 7 toward the pressing unit 3 in parallel with each other.

The pressing units 3 and 5 are each a pressing rod 11.
Alternatively, it has a pressure rod holder 9 or 10 as a supporting member for 12, and these pressure rods are configured as workpiece holders. The pressing unit 5 is the piston cylinder unit 1
3, the piston rod 13a of this piston cylinder unit is fixedly connected to the pressing rod holder 10. A joint 15 or 16 is flanged to the bottom of the cylinder 13b of the piston cylinder unit 13 as a drive device and to the pressing rod holder 9. The axes of these joints 15 and 16 are, as shown in FIG.
It is located horizontally at a right angle to the feed direction 7. The push rod holder 9 is fixedly connected to the mechanical mount 1.

The reaction force from one pressing unit 3 to the other pressing unit 5 is absorbed by a C-shaped force absorbing device, and this force absorbing device is a pair of C-shaped force absorbing elements 17a and 17a.
b, the end regions of the legs 18a and 18b of these force-absorbing elements are supported on the joints 15 or 16 and are connected to one another by the shafts of these joints 15 and 16. Both force absorbing elements 17a and 17b are shown in FIG.
And 3 are arranged horizontally and parallel to each other.

Unlike the O-shaped force absorber, the workpiece part can be easily inserted into the push rods 11 and 12 by the C-shaped force absorber. Furthermore, the automatic operating device can be constructed much easier. Due to the high feed force used, the legs 18a and 18b of both C-shaped force absorbing elements 17a and 17b easily bend outwards. This is because the force absorbing element pair is entirely opened. Force absorbing elements 17a and 17
Since b according to the invention is simply connected to both pressing units 3 and 5 by both joints 15 and 16, this bending affects the accuracy of the planar pressing by both pressing units 3 and 5. Absent. A slight deviation from the parallelism of the push rods 11 and 12, tilting or lateral movement is also prevented.

Instead of articulating the piston-cylinder unit body 13 with the force-absorbing element pairs 17a and 17b via the joint 15, a joint (not shown) is also arranged between the piston rod 13a and the pressing rod holder 10. You can In this configuration, however, a bendable stabilizing plate, not shown, can advantageously be arranged between the cylinder 13b and the machine mount 1, as will be explained in other configurations below.

A variant of the pressing device according to the invention as a pressing device in a spark butt welding machine is shown in FIGS. Like the pressing device described above, the pressing unit body 21 is attached to the mechanical base 20 of the spark butt welding machine on the left side of FIG.
Is fixedly connected with. The other pressing unit 23 is arranged so as to be movable toward the pressing unit 21 in the feed direction 7.

The pressing unit 21 has a pressing rod holder 24 as a supporting member, and the pressing rod holder is screwed to the machine frame 20. A pressure rod 25 formed as a welding rod and a workpiece holder for one part of the workpiece parts to be welded to each other, and a horizontal shape formed like a joint 16 and perpendicular to the feed direction 7. A joint 26 having an axis is arranged on the push rod holder 24.

The pressing unit 23 has a pressing rod 27 formed as a welding rod and a workpiece holder for the other workpiece part held by the pressing rod holder 28. This pressing rod holder 28 is mounted on the machine base 20 and
It is movably held by two linear motion supports 19a, 19b and 19c. To provide a very precise guidance for the linear feed of the workpiece part to be welded, 3
Two supports 19a, 19b and 19c are used. Further, the pressing unit 23 has a double piston cylinder device 29 as a drive device for the feed force required for welding.
30a of one piston cylinder unit 30
Are swingably supported by the pressing rod holder 28 by a support 31 having an axis extending parallel to the axis of the joint 26. The piston head on the piston 32 a of the other piston-cylinder unit 32 has a joint 33 with its axis arranged parallel to the axis of the joint 26. Both cylinder housings 30b and 32b of both piston cylinder unit bodies 30 and 32 are fixedly connected to each other on the bottom side.

Supports 19a and 19b of the three linear motion supports are disposed on both sides of the support 31, and a third support 19c is disposed below the joint 26 at the center. The push rod holder 28 is mounted on the rehabilitation table 34 and is movably arranged on the mechanical frame 20 together with the supports 19a, 19b and 19c. The carriage 34 is movable in the feed direction 7 in the opening 35 of the machine mount 20 shown in FIG.

The absorption of the reaction force from one pressing unit body 21 to the other pressing unit body 23 is in this case also a force formed in one body having a C-shape, but a U-shaped cross section. Absorber 3
6 and the leg sides 40a and 40 of this force absorbing device.
The range of the end portion of b is set to the pressing unit 2 through the joints 26 and 33.
Articulated with 1 and 23. Both sides 40a and 40b of the force absorbing device 36 engaging the joints 26 and 33
Are connected to the respective mechanical mount openings 35a and 35b and the respective mechanical mount cutouts 35c and 35d.
It engages in the range of 3.

The housing surrounding the joint 33 is connected to the machine mount 20 via a stabilizing plate 37. The stabilizing plate 37 can elastically bend in the feed direction 7 with a small force. This stabilizer is perpendicular to the feed direction 7 and has a very high stability against deformation. The stabilizing plate 37 prevents the force action of both piston-cylinder units 30 and 32 from bending of these piston-cylinder units from the feed axis 38 of both pressing units 21 and 23.

The piston cylinder unit 30 is composed of the pressing rod 2
In the part of the work piece inserted in 5 and 27, both push rods 2
Used to perform 5 and 27 large interfeed strokes. The piston-cylinder unit 32 produces only a short feed stroke and a precisely set feed force for the spark butt welding. In order to be able to accurately monitor this last feed stroke, a potentiometer 39 connected to a regulating device (not shown)
b and a ring 41 fixedly attached to the piston 32a
It is located between and.

Mechanical stand 2 of force absorbing device 36 under load
Since the deformation with respect to 0 is small, the stabilizing plate 37 is turned slightly elastically.

Instead of using piston-cylinder units for the feed, screw shaft devices, crank devices or eccentrics can also be used.

The pressing device can be used everywhere where both pressing rods must be subjected to high pressures and must be moved relative to each other in an exactly linear fashion. This pressing device can also be used in machine tools such as punches, milling machines, in multiple presses and the like.

[Brief description of drawings]

FIG. 1 is a side view of a pressing device.

FIG. 2 is a plan view of the pressing device shown in FIG.

FIG. 3 is a side view of a pressing device of the spark butt welding machine.

FIG. 4 is a plan view of the pressing device shown in FIG.

[Explanation of symbols]

 3,5,21,23 pressing unit 7 feeding direction 9,10,24,28 pressing rod holder 11,12,25,27 pressing rod 13,29 driving device 17a, 17b, 36 force absorbing device 18a, 18b, 40a, 40b legs

Claims (8)

[Claims] 1. A C-shaped force absorbing device (17a, 17b; 3)
6) is connected to each of both legs (18a, 18b; 40a, 40b) and at least one is connected to the drive device (1
3; 29) two push rods (11,
12; 25, 27) in which both pressure rods (11, 12; 25, 27) have a force absorbing device (17).
a, 17b; 36), which is articulated with each of both leg sides (18a, 18b), and has both pressing rods (3, 5; 2).
1, 23) to the support member (9, 10; 24, 28), C
A pressing device characterized in that the character-shaped force absorbing devices (17a, 17b; 36) are held so as to be aligned with each other in the pressing direction (7) regardless of opening. 2. The support member (9, 10; 24, 28) has a guide member (8a, 8b; 29a, 29b, 29c), and the drive device (13, 2) is provided by these guide members.
9) one or more push rods (11, 12; 25, 27), which can be driven by one or both, are guided in the pushing direction (7) against the other push rod or in alignment with each other. The pressing device according to claim 1, wherein the pressing device is provided. 3. A support member (9, 10; 24, 28) is arranged or formed on the machine mount (1; 20) and a C-shaped force absorbing device (17a, 17b; 36) is provided with a pressing rod ( 1
1, 12; 24, 28) supporting members (9, 1)
0; 24, 28) simply indirectly through the mechanical mount (1;
20. The pressing device according to claim 2, characterized in that it is coupled with 20). 4. The drive device (13) is characterized in that it is fixedly connected to a push rod (12) drivable by the drive device and articulated to a force absorbing device (17a, 17b). The pressing device according to any one of claims 1 to 3. 5. The drive device is articulated with a push rod (11, 12) driven by the drive device and is turnable in the pressing direction (7), but at right angles to the pressing direction (7). By means of a stable stabilizing plate (37), it is connected to a mechanical mount (20) having supporting and guiding members (29a, 29b, 29c), which prevents bending of the drive device (29) during the pressing process. The pressing device according to claim 2 or 3, which is used as an indicator. 6. The drive unit (29) has at least two drive units (30, 32) arranged in series, one of these drive units (30, 32) (3
0) causes a large feed stroke and the other (32)
6. Pressing device according to claim 4, characterized in that it produces a short feed stroke which is adjusted. 7. A drive unit (30, 30) of a drive device (29).
Pressing device according to one of claims 4 to 6, characterized in that 32) is formed by a piston cylinder unit. 8. A workpiece support (11, 12; 25, 27) formed as a welding rod, each pressing rod (11, 12; 2) for supporting the workpiece parts to be welded together.
A spark butt welder with a pressing device according to one of the claims 1 to 7, characterized in that it is provided on the free surface of (4, 28).