FR3088836A1 - SHEAR PRESS AND ASSOCIATED BLADE CHANGE DEVICE - Google Patents

Abstract

The present invention relates to a shear press (1) comprising: - a press (5) comprising a first cylinder unit (9) for compressing metallic elements, - a shears (7) comprising a second cylinder unit (13) for shearing metallic elements, - a chute (19) disposed on a front face (3b) of the shear press (1) and configured to pour sheared metallic elements towards the outside of the shear press (1), a protective flap (23) arranged at the front face (3b) above the chute (19) and movable in rotation about an axis parallel to the front face (3b) between a protective position and a raised maintenance position, in which the chute (19) is rotatable around an axis parallel to the front face (3b) between an inclined working position allowing the discharge and a raised maintenance position, - at least a third cylinder unit (25) configured to pass the protective flap (23) from the p protective position in the maintenance position, - a connecting means (27a, 27b) between the protective flap (23) and the chute (19) configured to move the chute (19) from the working position to the maintenance position when the third cylinder unit (25) moves the protective flap (23) from the protective position to the maintenance position. Summary figure: Fig. 2

Description

Description

Title of the invention: SHEAR PRESS AND ASSOCIATED BLADE CHANGING DEVICE The present invention relates to a shear press intended to compress and shear metallic elements.

The shear presses include shearing blades which it is necessary to change regularly due to their rapid wear on contact with the metallic elements.

However, these shearing blades being heavy and bulky, they require the presence of operators to enter the shear press for their change or to check their wear. Thus, in prior art shear presses, to allow operators access to the shear press, it is necessary to dismantle certain elements such as the chute or the protective sheet and install a bar of lifting of the protective plate and an access platform to allow operators to access the shearing blades.

Thus, because of all these operations, the time required for a blade change can be very important which implies a very high maintenance cost since on the one hand the operators have to spend significant time to make the change blade and secondly because the shear press is inactive during the time of blade change.

The present invention therefore aims to provide a solution to simplify operations allowing operator access to the shearing blades and thus simplify and reduce the time required for blade changes.

[0006] · Summary of the invention • To obtain such a solution, the present invention relates to a shear press comprising:

• - a press comprising a first unit for compressing metal elements, • - a shear comprising a second unit for shearing metal elements, • - a chute arranged on a front face of the shear press and configured to pour sheared metal elements towards the outside of the shear press, • - a protective flap arranged at the front face above the chute and movable in rotation around an axis parallel to the front face between a position protection and a raised maintenance position, • in which the chute is rotatable around an axis parallel to the [0007] · front face between an inclined working position allowing the spillage and a raised maintenance position,

- at least a third cylinder unit configured to move the protection flap from the protection position to the maintenance position,

- a means of connection between the protective flap and the chute configured to move the chute from the working position to the maintenance position when the third cylinder unit moves the protective flap from the protective position to the position maintenance.

The combination of a third cylinder unit and the protective flap and the chute makes it possible to facilitate the passage of the shear press from its operating position to its maintenance position and thus facilitate the work of operators leading to a reduction maintenance time and therefore reducing associated costs.

According to another aspect of the present invention, the shear press can comprise a connecting piece between the third jack unit and the protective flap, said connecting piece being movable in rotation about a parallel axis, preferably collinear, to the axis of rotation of the protective flap and forming a pivot connection with the third jack unit at a second end.

According to an additional aspect of the present invention, the connecting piece also comprises a support element on which the protective flap is configured to come to bear. The presence of the connecting piece makes it possible to be able to lift the shutter without having to use the third jack unit since the shutter is only supported on the connecting piece. Alternatively, the protective flap can be fixed to the connecting piece or to the third cylinder unit. In this case, the jack can be a jack that can be hydraulically disengaged so as to allow free movement of the protective flap.

According to another aspect of the present invention, the connecting means between the protective flap and the chute comprises at least one sling disposed between the protective flap and the chute.

According to another aspect of the present invention, the, at least one, sling is removable.

According to another aspect of the present invention, the second cylinder unit comprises a maintenance position for changing a shearing blade.

According to another aspect of the present invention, the protective flap is made of sheet metal.

[0008] ·

According to another aspect of the present invention, the shear press also comprises removable protective barriers intended to be fixed on the chute when the chute is in a raised maintenance position.

According to another aspect of the present invention, the shear comprises a shearing slider moved by the second shearing cylinder unit and in which the chute is fixed to the shearing slider.

According to another aspect of the present invention, the shear press comprises a frame enclosing the press and the shear and in which the first end of the chute is pivotally mounted on the shearing slide and the second end of the chute is connected to the frame by additional connecting means, for example at least one sling.

The present invention also relates to a method for changing a shearing blade of a shear press comprising:

- a press comprising a first unit for compressing metal elements,

- a shear comprising a second unit for shearing metal elements,

- a chute arranged on a front face of the shear press and movable in rotation about an axis parallel to the front face between an inclined working position allowing the discharge of the sheared metal elements towards the outside of the shear press and a raised maintenance position,

- a protective flap disposed at the front face above the chute and movable in rotation about an axis parallel to the front face between a protective position and a raised maintenance position,

- a third cylinder unit configured to move the protection flap from the protection position to the maintenance position,

- a means of connection between the protective flap and the chute configured to move the chute from the working position to the maintenance position when the third cylinder unit moves the protective flap from the protective position to the position maintenance,

Said method comprising the following steps:

- the first and second cylinder units are placed in a maintenance position allowing access to the shearing blades,

- the third actuator unit is controlled to move the protective flap from the protective position to the maintenance position as well as the chute from an inclined position to a horizontal position,

- protective barriers are placed on the chute,

- one or more shearing blades are changed, • - the protective barriers are removed, • - the third cylinder unit is controlled to move the protective flap from the maintenance position to the protection.

Description of the drawings [0010] Other characteristics and advantages of the invention will emerge from the following description, given by way of example and without limitation, with reference to the attached drawings in which:

[Fig.l] shows a schematic side view and in transparency of a shear press according to a first embodiment in a first position, [fig.2] shows a schematic perspective view of a shear press according to a first embodiment in the first position, [fig. 13] shows a schematic side view of a shear press according to a first embodiment in a second position, [fig. 14] 4] shows a schematic perspective view of a shear press according to a first embodiment in the second position, [fig. 5] shows a schematic side view of a shear press according to a first embodiment in a third position, [fig.6] represents a schematic perspective view of a shear press according to a first embodiment in the third position, [0017] [fig.7] represents a schematic perspective view of a shear press according to a first embodiment isation in the third position, [fig.18] represents a flowchart of the steps of a method of changing blades, [fig.19] represents a schematic perspective view of a shear press according to a second embodiment in the second and third position.

[Fig. 10] shows a schematic perspective view of a shear press according to a second embodiment in the second and third positions.

[Fig. 11] shows a schematic perspective view of a connecting piece of the shear press according to the second embodiment.

In all the figures, identical elements or ensuring the same function bear the same reference numbers.

The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment or that the characteristics apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments.

In the following description, the terms "first", "second", "second" ... for example "first position", "second position" are used for simple indexing of elements to name and differentiate elements or close but not identical actions. This indexing does not imply priority of an element over another and one can easily interchange such names without departing from the scope of this description. This indexing does not imply an order in time either.

· Detailed description of the invention [0026] Figures 1 and 2 show a diagram of a press shears 1. The press shears 1 comprises a frame 3 in which are housed a press 5 and a shears 7. The frame 3 has for example a substantially parallelepiped shape comprising a rear face 3a through which the metal elements to be sheared are received, a front face 3b through which the sheared metal elements are discharged and two lateral faces 3c and 3d.

The press 5 comprises a first cylinder unit 9 called compression of metal elements and a compacting element 11 mounted on one end of the first cylinder unit 9. By cylinder unit means a unit comprising a cylinder or several cylinders with an identical function. The first jack unit 9 here comprises a single jack and is configured to move the compacting element 11 between a high rest position and a low compression position.

The shears 7 comprises a second jack unit 13 called shearing metal elements here comprising a single jack, a first fixed shearing blade 15 mounted on the frame 3, a shearing slide 17 mounted on one end of the second unit cylinder 13 and a second movable shearing blade 18 mounted on the shearing slide 17. The second cylinder unit 13 is configured to move the shearing slide 17 between a high rest position and a low shearing position.

The shear press 1 also comprises a chute 19 disposed on the front face 3b of the frame 3 (corresponding to the front face 3b of the shear press 1) and configured to pour sheared metal elements outwards from the press shears 1. The chute 19 is for example pivotally mounted on the shearing slide 17 around an axis parallel to the front face 3b at a first end 19a. Thus, the first end 19a of the chute 19 is moved vertically as a function of the position of the shearing slider 17 so that the inclination of the chute 19 varies as a function of the position of the shearing slider 17. Alternatively, the first end of the chute 19 can also be fixed relative to frame 3.

The chute 19 is for example connected to the frame 3 by an additional connecting element positioned between the second end 19b of the chute 19 and an upper part of the frame 3. In the present case, the additional connecting means is produced by two additional slings 21a and 21b.

The shears press 1 also includes a protective flap 23 disposed at the front face 3b above the chute 19 and movable in rotation about an axis parallel to the front face 3b. The protective flap 23 is for example made of sheet metal.

Figures 1 and 2 correspond to a shear press 1 in a first position corresponding to a low position of the shearing slider 17 and a low position of the protective flap 23.

Figures 3 and 4 show a shear press 1 in a second position corresponding to an upper position of the shearing slide 17 and a lower position of the protective flap 23. In this second position, the chute 19 is in a position inclined work allowing the shearing of sheared metal elements.

The first and second positions correspond to the active working positions when the shear press 1 is in normal use.

Thus, the metal elements to be sheared are received by the rear face 3a, for example via a feed passage (not shown), then are compressed by the compacting element 11 during the passage of the first cylinder unit 9 from its high position to its low position. The compressed metal elements are then pushed at the level of the first shearing blade 15 and are sheared during the passage of the second actuator unit 13 from its high position to its low position, the metal elements then being sheared between the first fixed blade 15 and the second shearing blade 18 carried by the shearing slide 17. When the second jack unit 13 returns to its high position, the sheared elements are evacuated by sliding along the chute 19. The protective flap 23 makes it possible to direct the metallic elements sheared towards the trough 19.

The shear press 1 also includes a third cylinder unit 25, formed here by two individual cylinders 25a and 25b disposed on each side of the protective flap 23 and configured to be synchronized. The cylinders 25a, 25b comprise a first end connected to the frame 3 and a second end intended to drive the protective flap 23. The cylinders 25a, 25b can be connected directly to the protective flap 23, for example via a pivot connection or by the intermediary of connecting pieces 28a and 28b associated respectively with the two jacks 25a and 25b as shown in FIGS. 1 to 7. The connecting pieces 28a and 28b can be identical or symmetrical and arranged on either side of the protective flap 23 The connecting pieces 28a and 28b can be produced by tubes comprising a first bent end and rotatably mounted relative to a collinear axis axis the axis of rotation of the protective flap 23 and a second bent end on which is fixed in a rotary manner the jack 25a, 25b and on which is placed the protective flap 23. Thus, the movement of the jack 25a, 25b causes the rotation of the connecting piece 28a, 28b as well as the rota tion of the protective flap 23 which rests on the connecting pieces 28a and 28b. Thus, when the jacks 25a and 25b are in the folded position and the protective flap 23 in the low position, the latter can be raised manually since it is not rigidly connected to the connecting pieces 28a, and 28b or to the jacks 25a and 25b.

The connecting pieces 28a and 28b can take different forms from the form described above in relation to Figures 1 to 7.

Figures 9 and 10 show a second embodiment which differs from the first embodiment described above by the use of connecting pieces 28a 'and 28b' as shown in Figure 11. The connecting piece 28b ' has an elongated shape and comprises an orifice 281 has a first end to form a pivot connection relative to a collinear axis axis the axis of rotation of the protective flap 23. This axis is for example formed by an axis of the protective flap 23 as in FIGS. 9 and 10. The second end of the connecting piece 28b ′ comprises a lateral axis 283 on a first side on which the jack 25b is fixed by a pivot link and a lateral support 285 on a second side opposite to first side and configured to come into contact with the protective flap 23, the latter being only supported on the lateral support 285. The lateral support 285 has for example a curved shape, in particular convex on the part configured p or be in contact with the protective flap 23 to allow sliding of the protective flap 23 on the lateral support 285 during movement of the jack 25a. The shape of the lateral support 285 corresponds for example to a half-cylinder. The connecting piece 28b ’can be a single piece.

The connecting piece 28b ’is symmetrical with respect to the connecting piece 28a’.

The cylinders 25a, 25b of the third cylinder unit 25 are configured to move the protective flap 23 from a protective position in which the protective flap 23 is substantially vertical as shown in Figures 1, 2 and 9 in a high position corresponding to a maintenance position shown in FIGS. 5 to 7 and 10.

Alternatively, the jacks 25a, 25b of the third jack unit 25 can be replaced by a single jack arranged on one of the sides of the protective flap 23. There is then only one connecting piece, 28a, 28a 'or 28b, 28b'.

The different cylinders of the different cylinder units 9, 13, 25 can be hydraulic or electric cylinders.

The connecting pieces 28a, 28b, 28a 'and 28b' can be produced differently depending on the location of the jack unit 25. The connecting pieces 28a and 28b on the one hand and 28a 'and 28b 'on the other hand can also be integral and form a single piece.

The shears press 1 also comprises a connecting means between the protective flap 23 and the chute 19. The connecting means is here produced by two slings 27a and 27b which can be removable and which are arranged respectively on the two sides of the chute 19 and the protective flap 23. Alternatively, the connecting means may comprise a single sling disposed on one of the sides of the chute 19 and the protective flap 23.

27a and 27b slings can be arranged between the chute 19 and the connecting pieces 28a 'and 28b'. As shown in Figures 9 and 10, the connection between the slings 27a, 27b and the connecting pieces 28a ', 28b' can be achieved by a connecting device 31 which connects the slings 27a, 27b to the connecting pieces 28a and 28b . The connecting device 31 comprises for example two bars of identical length comprising, at a first end, an orifice intended to be positioned on the lateral axis 283 of the connecting pieces 28a 'and 28b' and at a second end a second orifice intended to receive a connecting pin between the two bars on which the sling 27a, 27b is fixed.

Other connecting means known to those skilled in the art can also be used.

Thus, to allow the inspection or the change of blades, the shear press 1 can be put in the maintenance position in which the first 9 and the second 13 actuator units are in a maintenance position allowing access to the shearing blades 15 and 18 inside the shear press 1. In addition, the jacks 25a, 25b of the third jack unit 25 pass into an unfolded maintenance position which makes it possible to pass the protective flap 23 from the vertical protective position to a raised maintenance position to allow an operator to pass under the protective flap 23.

The connecting means formed by the two slings 27a and 27b allows the chute 19 to pass from the working position to the horizontal maintenance position when the jacks 25a, 25b of the third jack unit 25 pass the protective flap 23 from the protective position to the service position.

Once the chute 19 in the horizontal maintenance position, protective barriers 29 can be arranged on either side of the chute 19 which then forms a gateway allowing an operator to access the interior of the shear press 1 and in particular to the shear blades 15 and 18 to allow their inspection and / or their change if necessary.

Thus, the use of a third cylinder unit 25 for passing the protective flap 23 in a maintenance position and a connecting means 27a, 27b for passing the chute 19 in a maintenance position when the protective flap 23 passes into the maintenance position allows an easy passage from a working configuration to a maintenance configuration of the shear press 1 since the actions of the operator are limited to make this configuration change. The connecting means 27a, 27b makes it possible to use a single jack unit to move two elements (the protective flap 23 and the chute 19).

The present invention also relates to a method of changing the blade of a shear press 1 using a shear press 1 as described above. The different stages of the process will now be described from FIG. 8.

The first step 101 relates to the control of the first 9 and second 13 actuator units in the maintenance position. This command puts the press 5 and the shears 7 in a maintenance position in which the operator can access the shearing blades 15 and 18 and replace them if necessary. In addition, the maintenance position may include a locking element making it possible to avoid any movement of the first 9 and of the second 13 actuator units when an operator is positioned in the shear press 1.

The second step 102 is an optional step which consists in installing the connection means, here the slings 27a and 27b between the protective flap 23 and the chute 19.

The third step 103 relates to the control of the third cylinder unit 25 for passing the protective flap 23 from the protective position to the maintenance position. The movement of the protective flap 23 also causes the movement of the chute 19 from an inclined position to a horizontal maintenance position.

The fourth step 104 relates to the installation of protective barriers 29 on either side of the chute 19 to avoid a fall of an operator. The protective barriers 29 are for example fixed by embedding of complementary shape. Step 104 can also be optional.

The fifth step 105 relates to the change of one or more shearing blades 15, 18. This step comprises for example a first sub-step of unlocking the shearing blade 15, 18. The unlocking comprises for example the unscrewing retaining nuts. A second sub-step for removing the used shearing blade 15, 18 in which the shearing blade 15, 18 is extracted from the frame 3. A third sub-step for placing a new shearing blade 15, 18 or alternately turning the shearing blade 15, 18 to use another shearing edge and then a fourth sub-step for locking the new shearing blade 15, 18 (or the inverted shearing blade).

The sixth step 106 relates to the removal of protective barriers 29 and may be optional if step 104 is not carried out.

The seventh step 107 relates to the control of the third cylinder unit 25 for passing the protective flap 23 from the maintenance position to the protective position which causes the passage of the chute 19 from the horizontal position to the working position allowing the shearing of the sheared elements.

The eighth step 108 is an optional step which consists in removing the connecting means, here the slings 27a and 27b between the protective flap 23 and the chute 19.

The shear press 1 can then be used again to treat metallic elements.

Thus, the process for changing the shearing blade 15, 18 requires little handling on the part of the operator to put the shearing press 1 in a maintenance position allowing access to the shearing blades 15, 18. Thus, the inspection and / or the change of the shearing blade 15, 18 are simplified, faster and less risky for the operator. This simplification and this saving of time makes it possible to reduce the maintenance costs and therefore to improve the overall yield of the shears 1.

Claims (1)

Claims [Claim 1] Shear press (1) comprising: - a press (5) comprising a first cylinder unit (9) for compressing metallic elements, - a shear (7) comprising a second cylinder unit (13) for shearing metallic elements, - a chute (19) disposed on a front face (3b) of the shear press (1) and configured to pour sheared metal elements towards the outside of the shear press (1), - a protective flap (23) disposed at the front face (3b) above the chute (19) and movable in rotation about an axis parallel to the front face (3b) between a protective position and a position maintenance record, characterized in that the chute (19) is movable in rotation about an axis parallel to the front face (3b) between an inclined working position allowing the discharge and a raised maintenance position, - at least a third cylinder unit (25) configured to move the protective flap (23) from the protective position to the maintenance position, - A connecting means (27a, 27b) between the protective flap (23) and the chute (19) configured to move the chute (19) from the working position to the maintenance position when the third cylinder unit (25) moves the protective flap (23) from the protective position to the service position. [Claim 2] Shear press according to claim 1 also comprising a connecting piece (28a, 28b, 28a ', 28b') between the third jack unit (25) and the protective flap (23), said connecting piece (28a, 28b , 28a ', 28b') being movable in rotation about an axis parallel to the axis of rotation of the protective flap (23) and forming a pivot connection with the third jack unit (25) at a second end, the protective flap (23) being configured to bear on said connecting piece (28a, 28b, 28a ', 28b'). [Claim 3] Shears press (1) according to claim 1 or 2 wherein the connecting means (27a, 27b) comprises at least one sling (27a, 27b) disposed between the protective flap (23) and the chute (19). [Claim 4] Shear press (1) according to claim 3 wherein the at least one sling (27a, 27b) is removable. [Claim 5] Shear press (1) according to one of the preceding claims wherein the second cylinder unit (13) comprises a maintenance position for changing a shear blade (15, 18). [Claim 6] Shear press (1) according to one of the preceding claims, in which the protective flap (23) is made of sheet metal. [Claim 7] Shear press (1) according to one of the preceding claims also comprising removable protective barriers (29) intended to be fixed on the chute (19) when the chute (19) is in a raised maintenance position. [Claim 8] Shear press (1) according to one of the preceding claims, in which the shear (7) comprises a shearing slide (17) moved by the second jack unit (13) and in which the chute (19) is fixed to the slide shearing (17). [Claim 9] Shear press (1) according to claim 8 comprising a frame (3) enclosing the press (5) and the shear (7) and in which the first end of the chute (19) is pivotally mounted on the shearing slide (17) and the second end of the chute (19) is connected to the frame (3) by an additional connecting means (21a, 21b). [Claim 10] Method for changing a shear blade (15, 18) of a shear press (1) comprising: - a press (5) comprising a first cylinder unit (9) for compressing metallic elements, - a shear (7) comprising a second cylinder unit (13) for shearing metallic elements, - a chute (19) arranged on a front face (3b) of the shear press (1) and movable in rotation about an axis parallel to the front face (3b) between an inclined working position allowing the pouring of the elements metal sheared towards the outside of the shear press (1) and a raised maintenance position, - a protective flap (23) disposed at the front face (3b) above the chute (19) and movable in rotation about an axis parallel to the front face (3b) between a protective position and a position maintenance record, - a third cylinder unit (25) configured to move the protective flap (23) from the protective position to the maintenance position, - A connecting means (27a, 27b) between the protective flap (23) and the chute (19) configured to move the chute (19) from the working position to the maintenance position when the third cylinder unit (25) moves the protective flap (23) from the protective position to the maintenance position, said method comprising the following steps: - the first (9) and the second (13) cylinder unit are placed (101) in a maintenance position allowing access to the shearing blades (15, 18), - The third cylinder unit (25) is controlled (103) to move the protective flap (23) from the protective position to the maintenance position as well as the chute (19) from an inclined position to a position horizontal, - protective barriers (29) are placed (104) on the chute (19), - one proceeds to the change (105) of one or more shearing blades (15, 18), - the protective barriers (29) are removed (106), - The third cylinder unit (25) is controlled (107) in order to pass the protective flap (23) from the maintenance position to the protective position.