FI96928B - Device for making cuts in disc-shaped materials, especially in sealing materials - Google Patents

Description

96928

DEVICE FOR CUTTING MATERIALS IN PLATE-SPECIFIC MATERIALS, ESPECIALLY FOR SEALING MATERIALS -ANORDNING FOR THE PURPOSE OF CUTTING MATERIALS IN STONE MATERIALS, SPECIFICLY IN TENT MATERIAL

The invention relates to a device for making circular cuts in a plate-like sealing material for making a round sealing ring. Such a device has a cutting base, means for anchoring the plate-like material to be cut to the cutting base, and a cutting mechanism and a cutting blade fitted thereto. The cutter mechanism is movable to cut a suitably sized seal.

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Making openings of various sizes and shapes in the plate-like material, especially materials intended for seals, is often a repetitive step in, for example, various service and maintenance operations of a power plant. Seal leaks must be able to be repaired quickly and work is often carried out on site to avoid long and costly power outages.

In the pipeline design of a power plant or similar, 20 efforts have already been made to take into account all aspects that facilitate maintenance. The service personnel are aware of the thicknesses and diameters of the seals required, and the aim is to keep the required number of seals of a certain size in stock. However, the storage of the various prefabricated seals used in piping connections is expensive. In addition, depending on the material used, the seals may harden when not in use or may change shape, rendering them unsuitable for use. nuskohteeseen.

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Therefore, efforts have been made to make the seals from the sheet material only at the installation site, in which case the necessary seal is provided and unnecessary storage is eliminated. However, cutting the seals has become a problem.

Using a template or the like, the dimensions of the required seal are transferred to the surface of the seal material, after which the seal according to the blank is cut. The cutting of the seal usually takes place with different cutters depending on the material available and its thickness. In particular, when round seals are cut from the sealing material, the dimensional accuracy must be the best possible. The work is slow and measurement errors easily occur, which in turn most often leads to high material consumption.

10 Hand cutters have been described in American patent publications. US 4,773,798 discloses a portable cutter in which a sealing material is placed between two round housings. One housing supports the material to be cut and the other 15 has a blade arranged at a suitable distance from the center. The housing with the blade is rotated by hand about its axis to cut a round body from the material. U.S. Pat. No. 4,782,730 discloses a hand cutter in which a cutter holder 20 rotatably rotates about its axis on the material to be cut, with the blades in place in the stop providing a circular cutting member.

Various aids have been developed for the cutting operation, which are mainly hand-operated and equipped with 25 different rotating and simultaneously cutting blades. The main problem is that the plate is cut to about half its thickness, after which it has to be turned and the seal can only be cut. In addition, turning the large handwheel of the device is heavy. Gaskets can also be made by stamping in workshop rooms, which requires a separate tool for each gasket size as well as a large number of other tools.

It is an object of the present invention to obviate the above problems and to provide a new seal cutting device which achieves substantial improvements and advantages over known seal cutters.

* an j an li i i i m 3 96928

The cutting device according to the invention, by which the above-mentioned objects can be achieved, is characterized in that the device comprises a drive device and a material rotating device connected to the drive device by means of transmission elements, such as a drive shaft, a gearbox and a toothed belt. , supported by an elliptical flywheel locked to the drive shaft of the drive device, to provide a cutting motion in the cutting blade.

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The invention provides a light and easily transferable seal cutting device, which speeds up and simplifies the cutting work and at the same time improves the quality of the final product as the dimensional accuracy of the seal increases.

15

The invention will now be described by way of example with reference to the accompanying drawings, in which

Figure 1 shows a cutting device according to the invention in the form of a side panel.

Fig. 2 shows a top view of the cutting device of Fig. 1.

Figure 3 shows the cutting mechanism of the cutting device of Figure 1.

Figure 4 shows another embodiment of the cutter mechanism of Figure 3.

Fig. 5 shows the mechanical crank construction of the cutting device of Fig. 1 with wire wheels.

Fig. 6 shows a wheel structure to be fastened to the counter panel of the cutting device of Fig. 1.

Figure 7 shows the cutting blade of the cutting device.

Fig. 8 is a side view of the arrangement of the bearing wheel of the cutter mechanism of Fig. 4 on a vertical slide.

Fig. 9 shows a construction device for rotating the material to be cut of the cutting device of Fig. 1.

Figures 1 and 2 show the cutting device 20 according to the invention both in a side view and in a top view. The cutting device 20 is housed in a rectangular, soundproof housing 35 4 96928, which is not shown in the figures for the sake of clarity. The dimensions of the protective housing surrounding the cutting device 20 are essentially as follows: length 1100 to 1300 mm, width 150 to 170 mm and height 140 to 160 mm. The protective housing-5 lo can be equipped with separate legs and wheels to facilitate mobility and handling. When cutting large-diameter sealing materials, adjustable side extensions can be attached to the protective housing.

A worm gear 18 is arranged at the first end 25 of the cutting device 20, which is powered by an electric motor 12 or a ball-mounted hexagonal drive shaft 14 mounted at the second end 27 of the device. The propulsion-15 device 12 is controlled by a separate footswitch.

The helical gearbox 18 transmits the required force at a reduced speed through the toothed belt 48 to the cutting material rotation apparatus 90 shown in Fig. 9 in more detail.

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The cover of the machining part 76 of the cutting device 20 is formed by a cutting base 45 fixed to the body 10 with hex screws and made of, for example, ground steel, which supports a carbide guide beam 40 and at the same time a sealing material 46, 46 'rotating during cutting. On the side of the machining part 76 of the cutting device 20 there is a fixed measuring scale 74 perpendicular to the cutting blade 36 located in the center 78 of the guide bar 40. A guide wire 72 in the direction of the cutting blade 36 30 is placed in the opening 38 on the scale side of the guide beam 40, by means of which it is possible to accurately determine the diameter of the seal to be cut from the scale 74. The guide beam 40 is locked in place -35 with components 37, 39 included in the IR ranging equipment to be installed in the 20.

The mower deck 20 must be removable and sideways! I! itt'i · hik i'i i tn 5 96928 movable support element 42, to which the operation of the wheel structure 43 shown in Fig. 6 prevents the cut seal 46 from detaching from the surface of the guide beam 40 during the cutting process. During the process 5, the support element 42 is lightly locked on the seal 46 to the support members 51 and 51 ', such as the joint, by fastening members 49, such as wing nuts. Counter wheels 44 attached to the support fork 47 support the seal 46 on both sides of the cutting blade 36.

A guide plate 41 attached to the guide beam 40 of the cutting device 20 is angled to four rectangular or circular longitudinal guides 62 along which the guide beam 40 can be moved along its entire length by a conveyor wire 64 connected thereto. For the passage of the conveyor cable 15 64, one cable wheel 66 is arranged at the first end 25 of the cutting device 20, and at the other end 27, at the end of the drive device 12, there are two cable wheels 66 '. With the solution shown in more detail in Fig. 5, the wire wheels 66 'are fixedly connected 20 to a mechanical rotation crank 68 or the like for adjusting the lateral adjustment of the cutter mechanism 16. The ends 65 of the conveyor wire 64 are connected to the wire wheels 66 'in different directions. When the crank 68 is rotated in the desired direction, one of the wire wheels 66 'fills up and the other discharges accordingly.

The cable wheel 66 tilts sideways depending on the direction of the respective cable pull. The cutting unit of the cutting device 20 is formed in more detail by the cutting mechanism 16 shown in Fig. 3.

Fig. 3 shows the cutting mechanism 16 of the cutting device of Fig. 1. The cutting mechanism 16 is arranged on the guide plate 41 of the guide beam 40. The main component of the cutting mechanism 16 is formed by a vertical or cutting slide 22 consisting of at least one plate. the bearing wheels 26, which support the slide and rotate in the formed guide grooves, are four in the solution shown. Attached to the lower part of the vertical slide 22 are two tension springs 32, which are locked at one end to the guide plate 41. The tension springs 32 act as return and tension springs, as a result of which the vertical slide 22 closely follows the trajectory of the elliptical flywheel 24. The elliptical flywheel 24 is locked from the power unit side of the guide plate 41 to the ball bearing drive shaft 14. At the upper end of the vertical slide 22 there is a detachable cutting blade 36 supported and guided by a carbide guide hub 78 of the guide bar 40. Through the center of the guide beam 40, the cutting blade 10 36 slightly cuts a seal less than 6 mm thick. When the cutting blade 36 is changed to a saw blade, sealing material thicker than 6 mm can be easily handled.

Figure 4 shows another embodiment of the cutter mechanism 16 of Figure 3. The cutter mechanism 16 'is attached to the guide plate 41 of the guide beam 40. The main component of the cutter mechanism 16' is formed by a vertical or cutting slide 221. On both sides of the vertical slide 22 'are mounted bearing wheels 26' supporting the slide and provided with a guide groove.

A bearing wheel 30 is attached to the lower part of the vertical slide 22 'between the slide plates, as a result of which the vertical slide 22' closely follows the trajectory of the elliptical flywheel 24. The slash reduces the lateral torques applied to the vertical slide 22 '. The structure is shown in more detail in a side view in Fig. 8. A vertical pendulum shaft 29 is further mounted on the vertical slide 22 ', at both ends of which tension springs 32 are attached, which are locked at one end on the guide plate 41. The tension springs 32 act as return and tension springs. Below the elliptical flywheel 24 attached to the drive shaft 14, a shock-absorbing cushion 34 made of rubber or a similar damping material is placed to dampen the sound. At the upper end of the vertical slide 22 'there is a removable cutting blade 36.

Figure 7 shows the cutting blade 36 of the cutting device 20. The cutting blade 36 is substantially hyperbolic in shape, narrower at the center than at the top and bottom. With the control screws 31 the cutting blade 36 is in the correct position il: Iff: »HIM I I *« 7 96928 on the slide and with the tightening screws 33 the blade is locked in place. The cutting tip portion of the cutting blade 36 is inclined and slightly concave in the cutting direction indicated by the arrow. The design of the cutting blade prevents the blade from locking between the cutting surfaces created in the cutting step. At the same time, the cutting blade 36 cutting from below the seal tends to slightly raise the sealing material 46 towards the counter-wheels above, whereby the additional force generated provides a smooth cutting mark and the cutting blade 10 can be kept thin when cutting thicker sealing materials.

Fig. 9 shows a rotating apparatus 90 of the sealing material 46 'to be cut by the cutting device 20 of Fig. 1. The feed table 50 consists of two upper 102 and 15 lower anchor plates, between which the sealing material 46' is firmly anchored in place. The locking is ensured by a locking member 104 and a locking tube 105 mounted on the support element support member 51. Other parts of the rotating apparatus 90 on a vertical shaft 94. Supported by a shaft nut 93. The clutch 100 of the compression spring device is attached to the clutch body 98. If the friction on the cutting blade becomes too great due to the thickness, hardness or other reason of the sealing material 46 'to be cut at the same time cutting blade-30 it. Switch 100 is infinitely adjustable by tightening the compression spring.

4 4

At the beginning of the cutting process of the sealing material 46 performed by the cutting device 10 shown in Figs. 1-7, the size of the outer circumference 82 of the required seal is measured. About 10 mm is added to the measured diameter, after which the sealing material 46 'is cut into a square. A center point is determined on the obtained body, which is marked, for example, with a hole punched in the seal. The dimension of the outer circumference 82 of the desired seal 46 is computationally divided in two. By rotating the crank 68, the cutting blade 36 is set to read the measurement result from the scale 74. The guide bar 40 is then locked in place. The sealing material 46 'to be cut is placed on the lower anchor plate 101 on the vertical axis 94 of the rotary feed table 50 of the cutting device 20. The upper anchor plate 102 is firmly attached to the sealing material 46'.

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The anchor plate 102 is locked by a locking member 104 and a locking tube 105 from the support element 42. The tip of the cutting blade 36 is pressed through the sealing member 46 ', after which the wheel structure 43 of the support element 42 is placed on both sides of the cutting blade 15 and the support element is locked. Pressing the footswitch starts the mower deck 20. When the outer circumference 82 of the sealing material 46 is cut, the locking element 42 is unlocked. By rotating the rotation crank 68, the guide beam 40 is moved to a dimension corresponding to the diameter of the inner circumference 84. The execution procedures are similar to those in the section of the outer circumference 82. After the inner ring 84 has been cut, the ready-to-use seal 46 is removed from its cutting base 45 and installed in its application. With the cutting device 20, it is possible to produce mainly 25 with a diameter of 45 mm from the size of the inner circumference 84 up to 1400 mm. outer ring 82 gaskets. If it is desired to produce elliptical or similar shaped seals 46, the rotating crank 68 is moved by turning the guide bar 40, whereby the cutting blade 36 follows the pattern drawn on the sealing piece 46 30.

It will be apparent to those skilled in the art that various embodiments of the invention may vary within the scope of the claims set forth below.

Claims (5)

1. Apparatus for making circular cuts in disc-shaped sealing material (46, 46 ') for manufacturing a circular sealing ring, which device (20) comprises - a cutting support (45); - means (101,102), for anchoring the disc-shaped material to be cut at the cutting base; - a cutting mechanism (16, 16 ') and a cutting bait (36) provided therein, which cutting mechanism is movable for cutting a seal of suitable diameter, characterized therein. the device further comprising: - a drive device (12) and - a device (90) for rotating the material to be cut, which device via power transmission means, such as traction shaft (14), gear (18) and toothed belt (48), is cup - loaded to the drive (12), and that - the cutter (36) is attached to a vertical slide (22, 22 ') supported by an elliptical flywheel (24) read on the axle (14) of the drive (12), achieve a cutting motion in the cutting bed. 2. Device according to claim 1, characterized in that. that the vertical slide (22, 22 ') is attached to a guide disk 25 provided with the vertical slide guiding bearing wheel (26, 26', 30) and that between the vertical slide (22, 22 ') and guide disk (41) is arranged at least one tension spring (32), which pushes the vertical slide towards the elliptical swing-Christmas. 30 Device according to claim 2, characterized in that. that the bull plate (41) is coupled to a drive wire (64) and to a square or round longitudinal guide (62,62 ') for controlling the shielding mechanism attached to the guide plate as it is moved. 4. Device according to claim 1, characterized in that. that the device comprises a movable, legible and a wheel member (42) provided with a wheel structure (43) for supporting the disc-shaped material during the cutting process. 5. Device according to claim 4, characterized in that. the wheel structure (43) comprises a support fork (47), with counter wheels (44) arranged therein for supporting the sealing material (46, 46 ') on both sides of the cutting bed (36). • ·; i im i nm l i i a: -