FR2624049A1 - Lightweight portable machine with cutting disc for tiles and all thin covering materials - Google Patents

Abstract

Portable machine with diamond-charged cutting disc for precision sawing of tiles, thin hard materials, mineralogical samples. The invention relates to a machine composed of a closed frame chassis (Figure 2) 11, made of profiled elements, whose upper element (Figure 2) 10 is a water reserve for lubricating the cutting disc. The closed frame chassis (Figure 2) 11 has the advantage of high rigidity which promotes the precision of the cuts. This chassis can be inclined by rotation about two spindles (Figure 2) 12 at 45 DEG , or other positions between 0 and 90 DEG , with respect to the plane of the table (Figure 2) 15 for slanting cuts. The table can be folded into one or more parts. A variant is provided with automatic advance of the motor/spindle unit and raising and lowering of the disc. The machine according to the invention is intended particularly for tiling and building companies.

Description

The present invention relates to a light portable machine (jO
Kg approx. In glass, reduced dimensions (length 90 cm, height 50 cm approx.) Intended for cutting by abrasive disc, thin hard materials, including stoneware, ceramic, stone, marble, granite, terracotta, mineralogical samples. the use of the professional or the amateur.

This machine has the originality of being presented in a set of parts ready to assemble very easily by the buyer.

Its particularity is to be built from a closed rigging frame of great rigidity for great cutting precision, and to have a water reserve with a capacity of about one liter incorporated in the horizontal upper element of the chassis . Water flows on the disc by gravity, in a plastic or rubber hose connecting the tank to the disc protection casing. For the cutting disc, a simple wetting is sufficient in terms of its contact with the material to be sawed, the second reason for watering is to avoid saw dust.

The built-in water reserve, located very above the cutting disc, has the advantage of not requiring a pump. For cases of intensive use, it is however possible to add a pump to recycle the water.

The fact of not necessarily requiring a pump for the sprinkler circuit makes it possible to reduce the final cost of the machine quite considerably and to make it very accessible to a large public.

The cutting of ceramic tiles, ceramic stoneware, used for coating floors and walls, as well as all related materials obtained by firing and vitrification in the oven, requires the use of an abrasive cutting disc (diamond preferably) used either dry or with a water supply ensuring its lubrication at the disc / material contact.

The design of this abrasive cutting disc machine with sprinkler system, ready to assemble when first put into service, aims to obtain better, sharper and more precise cuts in hard materials, than the so-called "tiler" or tile cutter system used by tilers or installers. The plaice te, the principle of which consists of a guided hard metal wheel which traces the cut on the upper face of the tiles and tiles without the possibility of cutting the material over its entire thickness, does not make it possible to break by manual or mechanical effort of the material, a clean and precise cut.

On the other hand, current machines with abrasive cutting discs, for companies which install tiles or thin coatings, are not offered in the version of the present invention with a closed tilting frame-frame for bias cuts, and water reserve for the lubrication of the cutting disc, incorporated in the structure.

The structure of the machine with closed chassis-frame ensures maximum rigidity favorable to the precision of cuts without chipping or spalling. This rigidity is saved in the case of bias cuts by tilting the structure forming the chassis-frame which can be oriented by its base. to get the desired tilt from the table plane.

This chassis-frame design eliminates most of the overhangs causing vibrations on other machines.

In fact, the two guide rails supporting the motorized spindle group and ensuring precise guidance of its tectonic movement, are fixed at each end, without overhang.

On other machines, the guide rail is only fixed on one side.

The entire chassis is tiltable and is positioned at different angular positions to ensure biased cuts, including those at 450. The fact of making the entire machine structure tiltable has the advantage of keeping a high rigidity favorable to the precision of the cuts and the longevity of the cutting disc.

The folding table in one or more parts reduces the space required for transport. The machine with folded table occupies a reduced space in a vehicle or on a construction site.

 The machine chassis can be made of metal, iron, cast iron, steel, aluminum, by mechanical welding, molding or assembly of flat or profiled elements, solid or hollow, in plastic, fiberglass, resins or composite materials.

The motorized spindle group can be electric, pneumatic, hydraulic. Its power is around one KW, its spindle speed from 2800 to 6000 rpm depending on the diameter of the disc used. In the most generalized version, the machine is designed for an abrasive cutting disc with a diameter of around 200mm, with a bore of 30mm, and a rotation speed of 3000 RPM. A motor with continuous variation of the number of revolutions can be provided, or an motor output with pulley connected to a pulley secured to the spindle of the cutting disc by a belt transmission.

Figure 1 shows in perspective the machine with its assembled elements and the folding table in one or more parts. A carrying handle on the upper part facilitates its transport.

Figure 2 shows the machine with its water reserve which is located in the hollow upper element of the frame structure, and the chassis rotation device. This rotation, necessary in the case of bias cuts at 450 or other angles, takes place around the axes located at the base of each vertical element of the chassis.

FIG. 3 represents the machine seen from the front, with the abrasive cutting disc.

Figure 4 shows the machine seen from the back with its motor unit rotating the cutting disc. The motor-spindle group is fixed to the base of the moving part moving along the length of the 2 guide rails.

For guide rails of length 60cm, the length of the chassis (overall) is approximately 90 cm, and its height approximately 50 cm.

The figure shows the motor-spindle group (1) which moves along the length of the guide rails (2). The water inlet (3) at the outlet of the water tank incorporated in the hollow part of the element (5) is connected to the sprinkler fork of the disc (4) via a pipe flexible rubber or plastic not shown in the drawing.

Figure 5 shows the locking device in angular position of the entire chassis, with two main positions 450 and 900 relative to the plane of the table. The position at 900 is used to obtain straight cuts, the position at 450 for bias or chamfer edges.

By pressing on the upper part of the lever (1) articulated on its axis (7), the base of this lever is released from the notched support (2), which allows the rotation of the frame around the axes (4) to engage the position angular to another positioning notch.

 The release of the upper part of the lever (1J returns it to its initial position by pushing a spring steel blade (5), the base of the lever engaging in the chosen notch of the support (6).

Figure 6 shows a front view of the locking device of Figure 5, with the lever (1) and the notched support (2), the latter secured to the fixed part of the cutting table.

Figure 7 shows the assembly of the chassis at its base.

Figure 8 shows the flanges (1) (2) for fixing the guide rails (3)
Figure 9 shows the detail of the part sliding on the two guide rails, and at the base of which is fixed the spindle motor group bolted in the threaded holes 4 and wedging relative to the rectified part (3).

Alternatively, the machine is manufactured fully assembled.

The machine of the present invention is provided in an additional version with mechanical advance system by variator to ensure the automatic movement of the motor-spindle group with disc in the return direction. Mechanical or manual lifting and lowering is proposed to adjust the cutting height of the disc in # when sawing by successive passes of very hard materials, where this sawing mode is essential.

In all variants, the spindle motor group can be either electric, pneumatic or hydraulic.

The machine of the present invention is more particularly intended for cutting (sawing) tiles and thin hard materials in construction companies. It can also be used by non-professionals. It also allows sawing of mineralogical samples.

Summary of the component parts of the machine - A chassis-frame with water tank incorporated in the hollow upper element in Figure 2 (10-11) and filling orifice with screw cap (9). The two vertical elements of the chassis are provided in hollow or solid profiles, or sheet steel, or plastic, resin or composite material. This assembly is tiltable to several angular positions by rotation about the axes (12) at its base.

-A table (15) foldable into several elements and having plumb with the disc and over the entire length of its movement, a groove of the entire thickness of the table.

-4 flanges shown in Figure 8 (1) (2), each flange with an outside diameter of about 30mm is made of 2 assemblable parts with an inside diameter of 15mm equal to that of the two guide rails.

-2 round guide rails figure 8 (3) or another section with a diameter or section of about 15mm and a length of about 70cm.

-1 sliding part in figure 9 (2) with bronze rings (1) or thrust ball bearings ensuring good sliding and parallelism of the
Part over the entire length of its movement on the guide rails.

A handle is fixed laterally on this part for the manual movement of the assembly back and forth with the engine block and cutting disc.

-A motor-spindle block fixed to the base of the sliding part in figure 9 (2).

- A protective casing figure 1 (7) fixed on the spindle motor group.

- A flexible connection pipe connecting the outlet (3) of the tank in Figure 4, to the sprinkler fork (4) for the flow of water on the cutting disc.

-2 axes, washers and pins figure 7 (5-6-7-8) -A folding table foldable in several parts, preferably in perforated sheet metal to lighten its weight, and covered on the top side with a carpet rubber or other protector.

Assembly of the machine ready to assemble -1) Opening of the table flat, dimensions 90X60 cm approximately.

-2) Installation of the chassis-frame with water reserve, at the anchor points, by placing the axes Figure 7 (5) in the bases (2) integral with the table. Push the pins in the direction of the arrow Figure 7, placing the washers (6-7-8) and a pin in the pin hole (9) of the pins (5).

The fixed base 2 is supplied integral with the table, its fixing having been ensured by welding or screwing the base (1) to the table.

3) Screw the 1/2 lower flanges shown in figure 8 (2) onto the inside of the vertical uprights of the hunting frame. Each 1/2 flange is screwed into two tapped holes diameter 4 present on the vertical uprights of the chassis.

The 1/2 flanges serve as cradle and positioning for the two guide rails.

4) According to FIG. 4, place the guide rails 3 and put the positioning keys in place in the key grooves 4 after having threaded on the two guide rails, the motor-spindle support of FIG. 9.

According to figure 8, place the 1/2 upper flanges (1) and fix them against the 1/2 flanges (2), a screw diameter 4 taking place in oval drilling (5) and screwing in tapped hole on the inside vertical uprights of the chassis-frame.

Bring the upper part of the collar closer to its lower half in order to grip the guide rail well and lock the clamping screw placed in the hole (5). Do the same for each collar.

5) Screw the engine block on the support 2 sliding on railsguides.Figure 9 representing the support.

6) Connect the hose for the water flow to the disc.

Water reserve: As indicated above, it is located in the upper part of the chassis-frame, this part consisting of a hollow profile closed by welding at each end of a plate ensuring sealing.

When the profile is made of aluminum or other material (stainless steel for example) resistant to water corrosion, there is no need to consider an interior coating. In other cases, the hollow profile will be filled on the inside by anti-corrosion or plastic coating, based on plastic or resin, paint, etc.

If the profile is closed at each of its ends by mechanical fixing, a seal will be interposed.

Rotation of the Chassis-frame around the axes at its base
Figure 7 shows the table (1) on which is fixed by welding or screws, the base (2) pierced with a hole (4) for the axis passage. This hole will be ringed with a bronze ring. Each of the 2 vertical elements (10) is pierced with a ringed hole (3). An axis <5) on which a washer (6) is placed is positioned in the bore (4), then passes through a washer (7) before being placed in the axis hole at the base of the vertical element of the chassis (3).

 A washer takes place on the outgoing length of the axis (5), then a pin placed in the hole (9) of the axis (5) retains the assembly in place.

This method of attachment allows the chassis to rotate around axes 5 to the desired angular position (for example 4501 in the case of bias cuts.

This machine offers the advantage over the tiler or tile cutters used by tilers or amateurs, to allow by the inclination of its chassis, the realization of bias cuts.

Its very simple construction and operating principle puts it within reach of professionals or even uninitiated amateurs.

Claims (6)

1) Portable machine with diamond cutting disc for precision sawing of tiles and thin hard materials, characterized in that it comprises a frame-frame FIG. 2 (11) with water reserve (10) in the upper element in hollow profile. 2) Machine according to claim 1 characterized in that the frame-frame assembly Figure 2 (11) is tiltable on its base (14) for making vertical cuts at 900 relative to the plane of the table or at 450 for skew cuts, other intermediate positions being possible.  3) Machine according to claims 1 and 2 characterized in that the upper part of the frame Figure 2 (8) consisting of a hollow profiled element, is a water tank for the lubrication by gravity of the cutting disc. 4) Machine according to claims 1,2 and 3 characterized in that the cutting table is foldable in one or more parts. 5) Machine according to any one of the preceding claims, characterized in that the various constituent parts are made of steel, cast iron, aluminum, by mechanically welded or molded process, or fiberglass, plastic, resin, wood, composite material. 6) Machine according to claims 1-2-3-4-5 characterized in that the motor-spindle group is either electric, or pneumatic, or hydraulic.