HU208647B - Worm-thread for producing the threads of screw conveyors of rolling-out machines - Google Patents

Abstract

The proposed rolling machine is based on a power driven lead profile. A portion of the conveyor flight in the form of a circular arc is held by a quick acting clamp (9) against the lead profile. It's then shaped by a roller which expands it along its inner dia. The lead profile and the roller can be changed, and the lead roller and bearing housings can be adjusted, so that conveyor flights of different dimensions can be produced(Dwg.0/1)

Description

The present invention relates to a worm leaf roller.

The currently known worm manufacturing technologies and the machines and equipment used for these can basically be divided into two groups. One group is the snails made of leaves, where the leaves are made by hammering a pre-made masterpiece, cold or hot pressing the preforms. (Laskowski-John: Disc Cut Technical Publisher, Budapest, 1983. p. 156). Here, the preform is a 300-degree annular ring article. Hammering on a masterpiece is a unique, non-productive method of craftsmanship, and the bumps make the surface of the snail leaf uneven.

In the case of pressing, only approx. An arc of 300 ° may be retained because the thread length of the blade greater than 360 ° is no longer compressible in the tool due to axial extrusion. Thus, we have to count about 20% material loss in this method.

In the apparatus used in the above process, the stamping tool consists of a seat which is the master piece itself, whereas the stamp moves in a guide column arrangement.

A major drawback of the apparatus is that each screw size requires a different size of masterpiece and stamp - a complete extrusion tool - which is expensive and time-consuming to produce.

Another category of conveyor screw manufacturing technology is the use of ribbon screws. In this method, the worm leaf is produced by rolling the belt.

This reduces the thickness of the worm leaf on the outside. As the conveyor auger operates with a greater relative slip between the leaf and the material to be transported in the vicinity of the outer diameter, the wear of the auger increases in the direction of the increasing radius and, over time, decreases in diameter more rapidly.

Among the equipment used to carry out the cold rolling process is the known Lanham (GB) worm leaf rolling machine.

The device consists of two opposite conical cylinders with adjustable spacing according to the thickness of the sheet.

The machine is equipped with a motor for moving the rollers and a robust frame structure for supporting the rollers.

The disadvantage of the machine is that its rollers wear out rapidly due to the high cold forming work, the machine is bulky and expensive to manufacture, and each screw size requires a different plate preform.

A device for forming a spiral is disclosed in DE 3 126 805.

This machine also has two opposing rolls and forms a special shaped preform into a spiral by rolling.

The disadvantages of this equipment are the same as those described for Lanham.

From the geometric data of the worm belt, the ratio of outer and inner helix lengths is generally 3: 1, so that the thickness of the sheet on the outer part of the worm belt rolled from the belt is reduced to one third of the original.

In use, it has been found that such a reduction in sheet thickness can lead to very rapid wear even if the sheet material is hardened at the same time as the hardening cannot compensate but reduce the increase in thinning caused by thinning.

A disadvantage, even when using a rolling machine, is that a different size of tape is required for each screw and only a suitable screw can be made of special cold-formed sheet, such as stainless steel.

It is an object of the present invention to provide a device for eliminating the drawbacks of known devices, i.e., not to thin the preform over its outer diameter, to produce the worm leaf without loss of material, and to make the device simple and easy to operate. It has been found that the drawbacks of the known equipment can be overcome by the design of an apparatus which does not accomplish extrusion, but rolling, but stretching of the preform. A feature of the device according to the invention is that it has a rolling roller and a guide roller in different planes, which narrow the annular blank according to its inner diameter, not its outer diameter.

However, the rolling machine according to the invention does not use a conventional annular blank, but an annular blank which is slit along its radius.

The present invention relates to a worm leaf roller for the manufacture of worm leaf conveyor screws from a pre-annular worm leaf having a motor drive, an electric motor, a shaft rotatable in a bearing housing on a base plate, and a guide profile with axial displacement.

The worm leaf unfolding machine is characterized by having a guide profile supported by a guide roller and axially movable along its axis, to which a radially ruptured helical leaf preform is fastened with a quick clamp and the inner leaf roller of the worm leaf roller extends along its inner circumference. also, the roller roller and the guide roller are arranged in different planes.

The guide profile and roller mounted on the pivot shaft can be replaced according to the typical dimensions of the worm leaf finished product. The bearing housings of the worm leaf unfolding machine can be varied according to the diameter of the worm leaf.

The unrolling machine has an electric motor driven by a rotary shaft-to-rib sleeve coupling which is rotatable for output. Figure 1 is a cross-sectional view of a worm leaf narrowed along its outer diameter by conventional means.

Figure 2 illustrates the plant according to the invention 2

EN 208 647 Β is a cross-sectional view of a worm leaf thinned out along its inner diameter.

Figure 3 is a side view of a worm leaf unwinding machine, a

Figure 4 is a top view of this.

Figure 5 is a front view of a worm leaf unwinding machine, and Figure 6 is a radially slit annular preform.

The bearing housings (3) on which the shaft (5) rotates are located on the base plate (1) of the spiral leaf rolling machine according to the invention shown in Fig. 3. The guide profile (4) is fixed to the shaft (5).

The guide profile (4) is provided with a quick release clamp (9) attached to the preform (8).

The guide profile (4) is supported by a guide ring (6) fixed to the base plate (1).

Further, the roller roller (7) is fixed to the base plate (1).

Fig. 4 shows an electric motor (10) driven by a motor (2) and its axis (5) and a guide profile fixed to the shaft (5).

Attached to the guide profile (4) is the preform (8) of the worm leaf.

The shaft (5) is connected to the electric motor (10) by a rib-shaft-rib sleeve (11).

Fig. 5, a front view of a worm leaf unfolding machine, shows the base plate (1), a bearing housing (3) fixed to the base plate in which the shaft (5) rotates.

The guide profile (4) is fixed to the shaft (5).

Attached to the guide profile (4) is the preform (8) of the worm leaf.

The roller (7) is fixed to the base plate (1). Between the roller roller (7) and the guide profile (4) is the screw blank (8).

The operation of the auger leaf unwinding machine is as follows.

The gear unit of the worm leaf roller (2) is rotatable. This rotates the shaft (5) in alternating directions, and since the guide profile (4) rests on the guide roller (6), it also moves axially according to the respective pitch.

The worm leaf (8) is made of an annular blank which is radially slit in one place (as shown in Figure 6). During the manufacturing process, the slit worm leaf preform (3) is manually opened during cutting by axial pre-action so that it can be fitted to the guide profile (4) mounted on the shaft (5) so that the guide profile (4) and the roller (7) roller. The next step is to fasten the worm leaf preform (8) to the guide profile (4) by means of a quick clamp (9).

By actuating the electric motor (10), the gear unit (2) is rotated by the guide profile (4) mounted on the shaft (5) or by the preform (8) of the worm leaf (8) attached thereto. As the guide profile (4) rests on the guide roller (6), it causes an axial displacement corresponding to the thread pitch of the guide profile (4) as a result of the moving motion, also carrying the preform (8). During this axial displacement, the roller roller (7), fixed to the base plate (1), performs axial stretching-rolling along the inner circumference of the screw blank (8).

The simultaneous rotational or axial displacement is made possible by the rib-shaft-rib sleeve connection (11).

The rotation of 44 degrees required during the operation, followed by a stop and then, otherwise, a reset by rotation, is provided by the gear unit (2) set for this purpose.

The guide profile (4) and the roller (7) are made in interchangeable sizes according to the typical dimensions of the worm leaf (8), while the bearing housings (3) can be adjusted to the diameter of the worm leaf (8).

The worm leaf thus produced has a cross-sectional view in Figure 2. It follows that the preform (8) has not been thinned along the outer diameter by the rolling machine according to the invention, in contrast to the product produced by the conventional apparatus shown in Fig. 1.

The process and the rolling machine of the present invention can also produce a 400 degree spiral leaf.

The worm leaf (8) can be made of carbon steel, but can also be made of stainless steel or non-ferrous metal.

The process according to the invention can also be used to produce not only cold forming plates, but also special material quality preforms, such as drill bits, auger slides for horizontal drilling, conical, vane screws.

The apparatus according to the invention is simple in design, easy to operate and productive.

The worm leaf produced by the device according to the invention can be used in a broader application area with increased service life.

The worm leaf according to the invention can be produced productively without loss of material.

Claims (3)

PATENT CLAIMS 1. A worm leaf roller for the production of conveyor screws from a circular preform having a gear, electric motor, a pivot shaft mounted on a base housing, a shaft mounted on a shaft and axially displaceable, and having rollers (6), 5) has a guide profile (4) which is pivotable and axially movable and which, by means of a quick clamp (9), secures a radially slit helical leaf (8) and a spiral leaf roller having a roller (7) extending its inner circumference; the roller roller (7) and the guide roller (6) are in different planes. The worm leaf roller machine according to claim 1, characterized in that the guide profile (4) mounted on the pivot shaft (5) and the roller roller (7) are interchangeable according to the dimensions of the worm leaf (8) to be manufactured and adjustable to the diameter of the shaft (5). has bearing housings (3). The worm-leaf unwinding machine according to claim 1 or 2, characterized in that the shaft (5) has a rib-shaft-rib-sleeve connection (11) and has an actuator (2) driven by an electric motor (10) of alternating rotation.