IT202000020428A1 - TOOL HOLDER DEVICE FOR BROACHING AND SLOTTING - Google Patents

Description

Description of Patent for Industrial Invention entitled: ?TOOL HOLDER DEVICE FOR BROACHING AND SLOTTING?.

DESCRIPTION

The present invention refers to a tool holder device for broaching and slotting.

With particular but not exclusive reference to the technical sector of mechanical machining, ? it is known to use tool holder devices generally mounted on automated or semi-automated machines to carry out both turning operations and broaching and slotting operations of a great variety? of mechanical parts.

In general, this type of device is equipped with a support frame on which the mounted a mobile tool in contact with the piece, so as to create one or more? machining, for example as keyways or the like.

In particular, the support frame defines a sliding channel within which the tool is placed. moved by reciprocating rectilinear motion, advancing and retreating along a working direction, to progressively remove small layers of material from the workpiece.

This type of device also comprises tool tilting means suitable for inclining the tool with respect to the working direction, moving it away from the piece in the step of the tool retraction.

In this way, the tool does not risk remaining in contact with the piece as it moves back, risking compromising the machining performed during the advancement phase.

However, this type of devices are open to improvements.

In particular, the panning means are generally provided with a plurality of of mechanical components that must be housed interposed between the support frame and the tool, so as to allow the inclination of the latter.

Therefore, these mechanical components inevitably increase the size and weight of the device.

Furthermore, the tool? housed to measure inside the sliding channel of the support frame, so as to minimize the interstitial space between the two, keeping the tool stably in axis with the working direction. This expedient considerably limits the space for housing the mechanical components of the tilting means.

Therefore, the limited space to house the means of swing and the need? to limit the size and weight of devices of the known type make it necessary to use structurally and mechanically particularly tilting means.

Do these drawbacks increase the complexity? of use and the manufacturing cost of devices of the known type, making them less attractive on the market.

The main task of the present invention ? that of devising a tool holder device for broaching and slotting which allows the overall dimensions of the device itself to be reduced with respect to devices of the known type.

An additional purpose of the present invention ? that of devising a tool holder device for broaching and slotting which allows to reduce the weight of the device itself with respect to devices of the known type.

A further purpose of the present invention ? that of devising a tool holder device for broaching and slotting which allows to reduce the complexity? structural and mechanics of the swing means.

Another object of the present invention ? that of devising a tool holder device for broaching and slotting which allows the aforementioned drawbacks of the prior art to be overcome within the ambit of a simple, rational, easy and effective solution to use and with low cost. The purposes set out above are achieved by the present tool holder device for broaching and slotting having the characteristics of claim 1.

Other characteristics and advantages of the present invention will become more evident from the description of a preferred, but not exclusive, embodiment of a tool holder device for broaching and slotting, illustrated by way of example, but not in limitation, in the attached tables of drawings in which :

figure 1 ? an axonometric view of the device according to the invention; figure 2 ? an axonometric view of a detail of the device according to the invention in the working configuration;

figure 3 ? a sectional view of the device according to the invention in the working configuration;

figure 4 ? an axonometric view of a detail of the device according to the invention in the rest configuration;

figure 5 ? a sectional view of the device according to the invention in the rest configuration.

With particular reference to these figures, yes? indicated globally with 1 a tool holder device for broaching and slotting.

The tool holder device 1 for broaching and slotting comprises: - at least one support frame 2 defining at least one sliding channel 3;

- at least one tool assembly 24 slidably coupled with respect to the support frame 2 inside the sliding channel 3 and provided with at least one tool 12, 13 for machining a piece 4; - movement means 19, 21, 22, 38 of the tool unit 24 for reciprocating rectilinear motion forward and backward with respect to the piece 4 for machining the same;

- swing means 7, 8, 30, 32 of the tool 12, 13 between at least one working configuration, in which ? arranged along a working direction A in contact with the piece 4 to machine it, and at least one rest configuration, in which ? inclined to the working direction A.

In the continuation of the following discussion with the term ?inclined? employed with reference to one or more? elements of the device 1, it is intended to indicate a rotation of such or such elements with respect to an axis of rotation.

In particular, the tool 12, 13 ? in the working configuration when the tool group 24 ? moved towards piece 4, while ? in the rest configuration when the tool group 24 ? moved away from piece 4.

In this way, the tool 12, 13 remains in contact with the piece 4 only during the advancement of the tool group 24 towards the piece 4.

Advantageously, the tool group 24 defines at least one cavity 5 inside it and the tilting means 7, 8, 30, 32 are arranged at least partially inside the cavity? 5.

This expedient allows the overall dimensions of the device 1 to be considerably reduced.

In particular, the tool assembly 12, 13 comprises at least one containment body 6 defining the cavity? 5 and defining at least one access port 9 to the cavity? itself.

Furthermore, the tool 12, 13 ? disposed at least partially inside the cavity? 5 through access port 9.

In this way, the tool 12, 13 cantilevers at least partially outside the containment body 6 to work the piece 4.

Preferably, the containment body 6 is elongated shape. Furthermore, the containment body 6 ? preferably substantially cylindrical in shape.

Advantageously, the cavity? 5 extends substantially along the entire length of the containment body 6, as shown in figure 3.

Conveniently, the swing means 7, 8, 30, 32 comprise:

- at least a first abutment body 7 disposed inside the cavity? 5 and associated with the tool 12, 13;

- at least a second abutment body 8 disposed inside the cavity? - at least one movement unit 30, 32 of at least one between the first and second abutment body 7, 8 to pressurize the other between the first and second abutment body 7, 8 to move the tool between the working configuration and resting configuration.

Preferably, the second batting body 8 ? associated with the containment body 6.

Advantageously, the tool 12, 13 ? coupled movably in rotation around an inclination axis B to the containment body 6 at a coupling point 14 inside the cavity? 5. Conveniently, the tilt axis B ? substantially transversal to the working direction A.

Preferably, the inclination axis B ? orthogonal to the working direction A.

In this way, in the rest configuration, the tool 12, 13 ? rotated around the axis of inclination B and ? inclined, away from the piece 4, with respect to the working direction A.

Conveniently, the tool unit 24 comprises means 10, 11 for coupling the tool 12, 13 to the containment body 6. The coupling means 10, 11 comprise at least one housing 10 made on one of the tool 12, 13 and the body containment 6, and at least one pin 11 made on the other between the containment body 6 and the tool 12, 13 and coupled free to rotate inside the housing 10.

According to the embodiment of the device 1 shown in the figures, the pin 11 is associated with the tool 12, 13 and the housing 10 comprises a pair of slots 26 made opposite each other inside the cavity 5.

Conveniently, the pin 11 extends longitudinally along the inclination axis B and the tool 12, 13 ? free to rotate around the same axis. However, further embodiments of the coupling means 10, 11 are not excluded, for example as coupling means of a type known to a person skilled in the art.

Advantageously, the tool 12, 13 ? conformation substantially elongated to occupy the cavity? 5 substantially along its entire length, as shown in figure 3.

Preferably, the tool 12, 13 comprises at least one body 13 for working the piece 4 arranged at least partially outside the cavity. 5 through the access port 9 and able to directly work the piece 4.

Furthermore, the tool 12, 13 preferably comprises at least one support body 12 of the working body 13 arranged at least partially inside the cavity. 5 and pivoted rotating around the inclination axis B to the containment body 6.

Conveniently, the device 1 comprises means for removable association of the working body 13 to the support body 12. In this way, the working body 13 is? removably coupled to the support body 12, so as to allow its disassembly, for example for maintenance, replacement or similar operations.

Advantageously, the first abutment body 7 ? spaced and opposed to the coupling point 14 along an extension direction C of the tool 12, 13.

In this way, the tool 12, 13 defines the so-called long arm of a lever mechanism of the first kind, where the length of this arm is? defined by the distance between the coupling point 14, which acts as a fulcrum, and the first abutment body 7, on which the pressure exerted by the second abutment body 8 acts.

Advantageously, the containment body 6 comprises a pair of end portions 15 spaced apart and opposed to each other.

In particular, the distance of the end portions 15 defines the longitudinal extension of the containment body 6.

Conveniently, the first batting body 7 ? disposed in correspondence with one of the end portions 15 and the coupling point 14 ? arranged in correspondence with the other of the end portions 15.

In particular, the coupling point 14 ? disposed in the vicinity? of the access light 9.

In other words, the terminal portion 15 at which the tool 12, 13 is located. coupled to the containment body 6 defines the access port 9, as shown in figure 3.

Advantageously, the movement unit 30, 32 comprises at least one elastically deformable unit 30 interposed between the first abutment body 7 and the containment body 6.

In particular, the elastically deformable group 30 ? load in the working configuration, tending to move the tool 12, 13 from the working configuration to the rest configuration, and ? at least partially unloaded in the rest configuration, tending to keep the tool 12, 13 in the rest configuration.

Preferably, the elastically deformable unit 30 is arranged substantially opposite with respect to the second abutment body 8, as shown in figure 3.

In other words, the elastically deformable group 30 ? arranged substantially opposite to the point at which the first abutment body contacts the second abutment body 8 under pressure.

In this way, the elastically deformable group 30 maintains the first abutment body 7 to abut the second abutment body 8 under pressure. Advantageously, the elastically deformable group 30? associated with at least one of the first abutment body 7 and the containment body 6. In particular, the elastically deformable unit 30 comprises at least one sliding seat 18, a sliding body 28 housed at least partially inside the sliding seat 18 and slidingly movable inside the latter, and an elastically deformable body 29 interposed between the sliding seat 18 and the sliding body 28.

Preferably, the sliding seat 18 is made on the tool 12, 13 and the containment body 6 ? arranged at least partially outside the sliding seat 18 to abut against the containment body 6.

However, further embodiments of the elastically deformable unit 30 are not excluded, in which the sliding seat 18 is made on the containment body 6 and the sliding body 28 is arranged to abut the tool 12, 13.

In the working configuration, the elastically deformable body 29 is load, that is? compressed inside the sliding seat 18 by the sliding body 28.

In the rest configuration, on the other hand, the elastically deformable body 29 is at least partially unloaded and pushes the sliding body 28 towards the outside of the sliding seat 18, tilting the tool 12, 13.

Conveniently, the movement group 30, 32 comprises at least one movement group 32 interposed between the second abutment body 8 and the movement means 20, 21, 22 and cooperating with the latter to move the second abutment body 8 towards the first abutment body 7, pushing it under pressure, in the working configuration, and away from the first abutment body 7, releasing it at least partially, in the rest configuration.

Advantageously, the handling means 19, 21, 22, 38 comprise:

- at least one rectilinear guide 21, 22, 38 which extends along an extension direction E substantially orthogonal to the working direction A and associated with the tool unit 24 and with the second abutment body 8;

- at least one rotor body 19 rotating around an axis of revolution G and provided with at least one guided element 20 spaced radially from the axis of revolution G and slidingly coupled inside the rectilinear guide 21, 22, 38.

In particular, the movement means 19, 21, 22, 38 move the tool group 24 with reciprocating rectilinear motion forward and backward with respect to the piece 4 along a movement direction F. Preferably, the rectilinear guide 21, 22, 38 defines at least a guide channel 27 which extends along the development direction E and within which ? the guided element 20 is slidably housed.

Furthermore, the driven element 20 ? housed to measure inside the guide channel 27.

In addition, the development direction E ? orthogonal to the movement direction F.

During the rotation of the rotor body 19, the guided element 20 slides longitudinally along the direction of development E inside the rectilinear guide 21, 22, 38 and at the same time drags the latter, forwards/backwards along the movement direction f.

In this way, the tool group 24 ? moved by reciprocating rectilinear motion towards and away from the piece 4 along the movement direction F.

In particular, during the advancement of the tool group 24 along the movement direction F, the guided element 20 travels a first half arc of a circumference, while during the movement backwards of the tool group 24 along the movement direction F, the rotating body 20 travels a second half arc of a circumference to complete a circular path of 360? around the axis of rotation H.

Advantageously, the direction of movement F coincides with the direction of work A, however, further embodiments of the device 1 are not excluded in which the direction of work A is inclined with respect to the direction of movement F.

Preferably, the body driven ? an idle rotating body around an axis of rotation H spaced out and substantially parallel to the axis of revolution G.

This expedient facilitates the sliding of the guided element 20 inside the rectilinear guide 21, 22, 38.

Advantageously, the movement unit 32 comprises at least one interaction element 23 associated with the second abutment body 8 and cooperating with the guided element 20 to move the tool 12, 13 between the working configuration and the rest configuration.

Preferably, the interaction element 23 comprises at least one thrust portion 16 and a hollow portion 17 made adjacent to the thrust portion 16.

In particular, during the advancement of the tool unit 12, 13, the guided element 20 is arranged in correspondence with the thrust portion 16, finding it at the abutment. In this way, the second abutment body 8 pushes the first abutment body 7 and keeps the tool 12, 13 in the working configuration.

During the withdrawal of the tool group 12, 13, the guided element 20 is arranged in correspondence with the empty portion 17, occupying it. In this way, the second serving body 8 ? approached to the guided element 20 by means of the elastically deformable group 30, which, in this way, keeps the tool in the rest configuration.

Preferably, the interaction element 23 comprises an inclined portion 31 made in continuity? with the thrust portion 16 and defining a guide slidably traveled by the guided element 20 in the transition between the work configuration and the rest configuration. Advantageously, the rectilinear guide 21, 22, 38 comprises a first and a second containment wall 21, 22 of the rotating body 20 arranged substantially opposite and parallel to each other.

In particular, the first retaining wall 21 ? interposed between the second abutment body 8 and the rotating body 20, which in turn? interposed between the first and second retaining walls 21, 22.

Furthermore, during the advancement of the tool unit 24, the rotating body 20 is pressed under pressure against the second containment wall 22, while during the retraction of the tool group 24, the rotating body 20 is pressed under pressure against the first containment wall 21.

Conveniently, the movement unit 32 comprises an access opening 35 obtained on the rectilinear guide 21, 22, 38 and crossed by the interaction element 23, which, in this way, slidingly movable inside and outside the rectilinear guide 21, 22, 38 through the access opening 35.

Conveniently, the opening of access 35 ? obtained on the first retaining wall 21.

Preferably, the movement unit 32 comprises at least one guide unit 31, 32 of the second abutment body 8 in approach/away from the first abutment body 7 along a guide direction I, provided with:

- at least one guide body 33 which extends along the guide direction I;

- at least one guided body 32 associated with the second abutment body 8 and slidably coupled to the guide body 33 along the guide direction I.

Preferably, the guide body 33 is associated with the containment body 6.

Furthermore, preferably, the driving direction I coincides with the movement direction F and with the working direction A, however, further embodiments of the device 1 are not excluded, in which at least one of the movement direction F, the working direction A and the driving direction I is substantially transversal with respect to one of them.

Advantageously, in the working configuration, the guided body 32 is approached to the first abutment body 7 along the guide direction I due to the thrust exerted by the guided element 20 on the thrust portion 16. In this way, the second abutment body 8 meets the first abutment body 7 under pressure, maintaining the resiliently deformable unit 30 loaded.

In particular, this configuration ? maintained until the guided element 20 encounters the thrust portion 16.

In the rest configuration, on the other hand, the guided body 32 is moved away from the first abutment body 7 due to the thrust exerted by the elastically deformable unit 30 on the first abutment body 7, which presses under pressure against the second abutment body 8 and causes the interaction element 23 to slide inside the straight guide 21, 22, 38. In particular, this configuration ? maintained as long as the?guided element 20 ? arranged in correspondence with the empty portion 17.

In fact, during the transition from the rest configuration to the working configuration, the guided element 20 encounters the inclined portion 31 and gradually pushes the interaction element 23 outside the rectilinear guide 21, 22, 38 until it reaches the thrust 16. This thrust allows the second abutment body 8 to oppose the pressure exerted by the first abutment body 7 by means of the elastically deformable unit 30 and restore the working configuration. Conversely, during the transition from the working configuration to the rest configuration, the guided element 20 encounters the inclined portion 31 and gradually releases the thrust portion 16 until it is positioned in correspondence with the empty portion 17. In this way, the elastically deformable 30 ? free to unload and pushes the first abutment body 7 to press under pressure against the second abutment body 8, which slides along the guide direction I and arranges the interaction element 23 inside the rectilinear guide 21, 22, 38.

Conveniently, the first abutment body 7 comprises a first inclined surface 36 and the second abutment body 8 comprises a second inclined surface 37 facing in contact with the second inclined surface 37.

Furthermore, the first and second inclined surfaces 36, 37 are pressed under pressure on each other by the movement unit 30, 32 and are movable slidingly on top of each other to move the tool 12, 13 between the configuration resting and working configuration.

Preferably, the first and second inclined surfaces 36, 37 are arranged substantially transverse to the driving direction I.

In particular, during the transition from the rest configuration to the working configuration, the second inclined surface 37 presses under pressure against the first inclined surface 36 along the driving direction. In this way, the first inclined surface 36 slides in contact with the second inclined surface 37 and rotates around the inclination axis, simultaneously rotating the tool 12, 13.

During the transition from the working configuration to the rest configuration, on the other hand, the first inclined surface 36 presses under pressure against the second inclined surface 37 along a substantially transverse direction of action with respect to the driving direction I. In this way, the second inclined surface 37 slides in contact with the first inclined surface 36, moving away from it along the driving direction I.

Advantageously, the guide body 33 coincides with the rectilinear guide 21, 22, 38.

In particular, the rectilinear guide 21, 22, 38 comprises a base wall 38 interposed between the first and second containment walls 21, 22 and defining the guide channel 27 with the latter.

Furthermore, the guide body 33 defines a guide duct 39 formed on the base wall 38 substantially opposite the guide channel 27.

Conveniently, the guide duct 39 extends along the guide direction I substantially orthogonal to the development direction E, along which the rectilinear guide extends.

Yup ? in practice it has been observed that the described invention achieves the proposed aim and objects.

In particular, the cavity formed in the tool unit, it allows the tilting means to be housed inside the tool itself, reducing the size and weight of the device with respect to known types of devices.

Furthermore, the space provided by the cavity? allows you to significantly reduce the complexity? mechanics and structure of the swing means.

In addition, the particular mechanical and structural characteristics of the components of the tilting means make it possible to optimize the space provided by the cavity? and to further reduce the size and weight of the device.

Claims (9)

1) Tool holder device (1) for broaching and slotting, comprising: - at least one support frame (2) defining at least one sliding channel (3); - at least one tool unit (24) coupled slidingly with respect to said support frame (2) inside said sliding channel (3) and provided with at least one tool (12, 13) for machining a piece (4 ); - movement means (19, 21, 22, 38) of said tool unit (24) of reciprocating rectilinear motion forward and backward with respect to the piece (4) for machining the same; - swing means (7, 8, 30, 32) of said tool (12, 13) between at least one working configuration, in which ? arranged along a working direction (A) in contact with the piece (4) to work it, and at least one rest configuration, in which ? inclined with respect to said working direction (A) away from the piece (4); characterized in that said tool group (24) defines at least one cavity? inside it and said tilting means (7, 8, 30, 32) are arranged at least partially inside said cavity? (5). 2) Device (1) according to claim 1, characterized in that said tool group (12, 13) comprises at least one containment body (6) defining said cavity? (5) and defining at least one access port (9) to said cavity? (5) and by the fact that said tool (12, 13) ? disposed at least partially inside said cavity? (5) through said access port (9). 3) Device (1) according to one or more? of the preceding claims, characterized in that said tool (12, 13) is coupled movably in rotation around an inclination axis (B) to said containment body (6) at a coupling point (14) inside said cavity? (5), said inclination axis (B) being substantially transversal with respect to said working direction (A). 4) Device (1) according to one or more? of the preceding claims, characterized in that said swivel means (7, 8, 30, 32) comprise: - at least one first abutment body (7) arranged inside said cavity? (5) and associated with said tool (12, 13); - at least one second abutment body (8) arranged inside said cavity? (5); - at least one movement unit (30, 32) of at least one of said first and said second abutment body (7, 8) to abut under pressure the other between said first and said second abutment body (7, 8), pushing it, to move said tool (12, 13) between said working configuration and said rest configuration. 5) Device (1) according to one or more? of the previous claims, characterized by the fact that: - said first abutment body (7) comprises a first inclined surface (36); - said second abutment body (8) comprises a second inclined surface (37) facing in contact with said second inclined surface (37); - said first and second inclined surfaces (36, 37) are pressed against each other under pressure by said movement unit (30, 32) and are movable slidingly against each other to move said tool (12, 13) between said rest configuration and said working configuration. 6) Device (1) according to one or more? of the preceding claims, characterized in that said movement unit (30, 32) comprises at least one elastically deformable unit (30) interposed between said first abutment body (7) and said containment body (6), said elastically deformable unit ( 30) being loaded in said working configuration, tending to move said tool (12, 13) from said working configuration to said rest configuration, and being at least partially unloaded in said rest configuration, tending to keep said tool (12, 13 ) in said rest configuration. 7) Device (1) according to one or more? of the preceding claims, characterized in that said movement group (30, 32) comprises at least one movement group (32) interposed between said second abutment body (8) and said movement means (20, 21, 22) and cooperating with the latter to move said second abutment body (8) towards said first abutment body (7), pushing it under pressure, into said working configuration, and away from said first abutment body (7), releasing it at least partially, in said rest configuration. 8) Device (1) according to one or more? of the preceding claims, characterized in that said movement unit (32) comprises at least one guide unit (31, 32) of said second abutment body (8) in approach/movement to/from said first abutment body (7) along a driving direction (I), equipped with: - at least one guide body (33) extending along said guide direction (I); - at least one guided body (32) associated with said second abutment body (8) and slidably coupled to said guide body (33) along said guide direction (I). 9) Device (1) according to one or more? of the previous claims, characterized by the fact that: - said handling means (19, 21, 22, 38) comprise: - at least one rectilinear guide (21, 22, 38) which extends along a development direction (E) substantially orthogonal to said working direction (A) and associated with said tool unit (24) and with said second abutment body ( 8); - at least one rotor body (19) rotating around an axis of revolution (G) and provided with at least one guided element (20) spaced radially from said axis of revolution (G) and slidingly coupled inside said rectilinear guide (21 , 22, 38); - said movement unit (32) comprises at least one interaction element (23) associated with said second abutment body (8) and cooperating with said guided element (20) to move said tool (12, 13) between said working configuration and called rest configuration.