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Patent Searching and Data


Title:
MACHINE FOR MANUFACTURING SCREWS
Document Type and Number:
WIPO Patent Application WO/2016/147137
Kind Code:
A1
Abstract:
A machine (1) for the manufacturing of screws (2) is provided comprising manufacturing means (3) for the threading of the screws (2), a movement device (4) suitable to move the screws (2) from a loading station (4a) to a threading station (4b) at the manufacturing means (3), to an unloading station (4c), the movement device (4) comprising: a rotating drum (40), rotatable around an axis of rotation (40a) and comprising peripheral seats (41) for the screws (2) being machined, a brushless motor (42) suitable to move the rotating drum (40) around the axis of rotation (40a).

Inventors:
D'AMBROSIO RICCARDO (IT)
CIOCCIA LUIGI (IT)
Application Number:
IB2016/051500
Publication Date:
September 22, 2016
Filing Date:
March 17, 2016
Export Citation:
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Assignee:
REGG INSPECTION S R L (IT)
International Classes:
B21H9/02; B24B5/35; B21H3/04
Foreign References:
DE939628C1956-03-01
DE1013613B1957-08-14
DE917968C1954-09-16
US2859646A1958-11-11
US2932996A1960-04-19
Other References:
CSANYI, EDVARD: "Few Words About Stepper Motor (Advantages, Disadvantages and Classification)", 9 November 2013 (2013-11-09), XP002758688, Retrieved from the Internet [retrieved on 20160613]
Attorney, Agent or Firm:
LUNATI & MAZZONI S.R.L. (Via C. Pisacane 36, Milano, IT)
Download PDF:
Claims:
CLAI MS

1. Machine (1 ) for the manufacturing of screws (2) comprising,

- manufacturing means (3) for the threading of said screws (2),

- a movement device (4) suitable to move said screws (2) from a loading station (4a) to a threading station (4b) at said manufacturing means (3) and to an unloading station (4c),

- said movement device (4) being characterised in that it comprises:

- a rotating drum (40), rotatabie around a rotation axis (40a) and comprising peripheral seats (41 ) for said screws (2) being machined,

- a brushiess motor (42) suitable to move said rotating drum (40) around said axis of rotation (40a).

2, Machine (1 ) for the manufacturing of screws (2) according to claim 1 , wherein said rotating drum (40) is movable substantially exclusively in said direction of rotation around said rotation axis (40a), and wherein said manufacturing means (3) are movable so as to be placed in a working position, in which they thread said screw (2) and in a rest position, remote from said rotating drum (40),

3, Machine (1 ) for the manufacturing of screws (2) according to the preceding claim, wherein said movement of said manufacturing means (3) from said rest position to said working position and vice versa, takes place in a direction perpendicular to said axis of rotation (40a).

4. Machine (1 ) for the manufacturing of screws (2) according to one or more of the preceding claims, wherein said axis of rotation (40a) is substantially arranged on the horizontal plane.

5, Machine (1 ) for the manufacturing of screws (2) according to the preceding claim, wherein said threading station (4b) is in a position of said rotating drum (40) which, together with said rotation axis (40a), defines a substantially horizontal plane.

6, Machine (1 ) for the manufacturing of screws (2) according to the preceding claim, in which said loading station (4a) is in a position of said rotating drum (40) which, together with said rotation axis (40a), defines a substantially vertical plane.

7, Machine (1 ) for the manufacturing of screws (2) according to the preceding claim, wherein said unloading station (4c) is in a position of said rotating drum (40) reached after said threading station (4b) in the direction of rotation defined by the rotation from said loading station (4a) to said threading station (4b).

8, Machine (1 ) for the manufacturing of screws (2) according to the preceding claim, wherein in said unloading station (4c), said screws (2) are unloaded substantially by gravity.

Description:
DESC RI PTI ON

MACHINE FOR MANUFACTURING SCREWS

The present invention relates to a machine for the manufacturing of screws of the type specified in the preamble of the first claim.

Various types of machines for the manufacturing of screws are currently known of. They generally include a loading device and two rollers or a grinding wheel or similar, suitable to make the screw thread.

The loading device then brings the individual screws into contact with the rollers and after threading unloads them into a suitable container.

The loading device must therefore continually vary speed, stop to load the piece, move to bring it to the manufacturing station, stop to allow the manufacturing thereof, counter the vertical component of the rolling force and start again to allow the unloading of the piece being machined.

The prior art described has several significant drawbacks.

!n particular, the machine described is very complex and made up of various components.

For example, to allow the loading and unloading of pieces a rotating drum is present connected to a motor disc by means of a clutch. Said clutch causes the mutual sliding without connection or, conversely, the mutual connection between the rotating drum connected to the motor disc.

Such function and portion is very complex and prone to malfunction.

In this situation the technical purpose of the present invention is to devise a machine for the manufacturing of screws able to substantially overcome the drawbacks mentioned.

Within the sphere of said technical purpose one important aim of the invention is to obtain a machine for the manufacturing of screws which allows quick loading and manufacturing of the same, and an easy tuning in case of changes in the various manufacturing operations.

The technical purpose and specified aims are achieved by a machine for the manufacturing of screws as claimed in the appended Claim 1 .

Preferred embodiments are described in the dependent claims.

The characteristics and advantages of the invention are clearly evident from the following detailed description of preferred embodiments thereof, with reference to the accompanying drawings, in which:

Fig. 1 shows a front view of the machine for the manufacturing of screws according to the invention.

With reference to the Drawings, the machine for the manufacturing of screws according to the invention is globally denoted by reference numeral 1.

It is suitable to machine screws 2 and in particular to thread the screws 2. The term screws, in this patent, for simplicity of description, means the screws even before the threading procedure, when the screws 2 basically consist of a rod devoid of a thread.

The machine for the manufacturing of screws 1 comprises, in brief, manufacturing means 3, such as two rollers, a grindstone, various utensils or similar, for threading the screws 2 and a movement device 4 suitable to move the screws from a loading station 4a to a threading station 4b at the manufacturing means 3 and an unloading station 4c.

More in detail, the movement device 4 comprises a rotating drum 40, revolving around an axis of rotation 40a and comprising peripheral seats 41 for the screws 2 being machined and a brushless motor 42 suitable to move the rotating drum 40 around the rotation axis 40a.

The brushless motor is an electric motor of the type known per se, with a permanent magnet rotor and rotating magnetic field stator and preferably direct current. It permits a high degree of accuracy and the possibility of electronically programming the movement of said motor. The rotating drum 40 may thus be moved according to paths comprising including angular positions, stops, angular speeds and angular accelerations programmable with absolute precision.

Specifically, the rotating drum 40 is substantially mobile exclusively in said direction of rotation around the axis of rotation 40a. In addition, the axis of rotation 40a is substantially placed in the horizontal plane.

Said peripheral seats 41 are concave seats which permit the housing of the screws 2 preferably solely by gravity. In addition, the rotation of the seats 41 , along with the drum 40, permits the transfer in different angular positions which define said loading 4a, threading 4b and unloading stations 4c. The peripheral seats 41 are preferably eight in number, mutually staggered by angles of half a right angle.

In detail, the loading station 4a is in a position of the rotating drum 40 which, together with the rotation axis 40a, defines a substantially vertical plane. The screws 2 are inserted in said station preferably through a slanted chute 5 and substantially only by gravity. The chute 5 is in turn replenished by means known per se.

The threading station 4b is in a position of the rotating drum 40 which, together with the rotation axis 40a, defines a substantially horizontal plane. It is thus offset by a right angle from the loading station.

At the threading station 4b contact with the manufacturing means 3 which thread the screw 2 takes place. The manufacturing means 3 also cause the rotation of the screw by exploiting the movement of the manufacturing means 3 themselves and the variations of diameter of the screw 2 being machined due to the threading, in a manner known per se.

Moreover, to allow the manufacturing, the manufacturing means 3 are available in a working position, in contact with the screw 2, and, to allow the rotation of the drum 4, in a rest position, remote from the screw 2 and the rotating drum 40.

The movement of the manufacturing means 3 from the rest position to the working position and vice versa, takes place in a direction perpendicular to the rotation axis 40a, and preferably on the horizontal plane. The means 3 are then connected to a carriage 3a for the movement thereof.

The unloading station 4c is, lastly, in a position of the rotating drum 40 reached after the threading station 4b in the direction of rotation defined by the rotation of the loading station 4a to the threading station 4b. This position permits the unloading of the screws 2, in an appropriate container 6 substantially by gravity. The functioning of the machine for the manufacturing of screws 1 , described above in structural terms, is as follows.

The screws 2 are first placed in the chute 5 by known means and methods.

They slide as far as the drum 40 which rotates, so as to position a seat 41 in the loading station 4a, i.e. perfectly aligned with the chute 5.

A screw 2 thus enters the seat 41 and fills the same, so that other screws 2 cannot enter. The drum 40 then rotates, around the axis 40a, then travelling by half a right angle, and a subsequent seat is positioned in the loading station 4a to load a second screw 2.

The seat 41 , which houses the first screw 2, then travels by a right angle and positions itself at the threading seat 4b.

In this position the drum 40 is stopped and the manufacturing means 3, in the rest position, translate and are placed in the working position. In such position the means 3, or rollers or similar tools, thread the screw 2, by means of a manufacturing known per se.

The rotation of the drum 40 is then reactivated and the threaded screw 2 reaches the unloading seat. Here, being tilted downwards, it falls out of the seat 41 by gravity and reaches a container 6.

The machine for the manufacturing of screws 1 according to the invention achieves important advantages.

In fact, the particular configuration of the elements, the structure and shape of the drum 40 and in particular the brushless motor 42 allow a simple and programmable control of the movement of the drum 40, and thus of the machine itself.

Variations may be made to the invention without departing from the scope of the inventive concept defined in the claims.

In said sphere all the details may be replaced with equivalent elements and the materials, shapes and dimensions may be as desired.