Chuck assembly system

Abstract

The invention relates to a chuck assembly system (100) for a machine rotating about an axis (A), such as a lathe, comprising a substantially cylindrical spindle face (110) with axis (A), and a substantially cylindrical chuck face (120) with axis (A), the spindle face (110) being adapted to be assembled, at its rear end (111), with a spindle of the rotating machine and comprising at its front end (112), of revolution about the axis (A), a first interface (113), the chuck face (120) comprising, at its rear end (121), a second interface (123), and its front end (122), being adapted to accommodate a chuck (11), the first interface (113) being complementary to the second interface (123). Abbreviated figure: Figure 1

Description

Title of the invention: Chuck assembly system technical field

[0001] The invention relates to a chuck assembly system for a rotating machine, such as a machining lathe, allowing for a quick, precise and repeatable chuck change. Previous technique

[0002] A lathe is a machining tool which, in a known manner, has a rotating spindle. This rotating spindle drives a chuck in rotation. A chuck is a device, essentially rotating about the axis of rotation, adapted to grip a workpiece. For this purpose, a chuck comprises at least three concentric jaws, centripetal so as to clamp the workpiece by an outer diameter, or centrifugal so as to hold the workpiece by an inner diameter. The workpiece thus held is then driven in rotation by the rotation of the machine spindle, and at least one tool is brought into contact with the workpiece at the point where it is to be machined.

[0003] A chuck is secured to the spindle of the rotating machine by means of a plate which ensures, by one of its ends, an assembly with the spindle of the machine so as to be driven in rotation and by its other end an assembly with the chuck.

[0004] When changing the chuck, the old chuck must be removed from the table and a new chuck mounted on the table. However, the existing interfaces between the table and the chuck are generally tricky to assemble and require a lengthy adjustment process demanding considerable technical expertise to ensure proper concentricity.

[0005] Also, another system is sought which allows for a repeatable assembly in a quick and simple manner, in order to allow for a quick, simple and precise chuck change.

[0006] “Sensibly” in this context means a certain tolerance in shape, size or number, generally of 5% or 5°. - “Similarly parallel” means that the two parallel segments can form an angle of 0 to 5° between them. - “Approximately perpendicular” means that the two segments can form an angle of 90° ±5° with each other. - "Sensibly cylindrical" means that between the base and the axis there is an angle of 0 to 5° or a circularity defect of 5%. - "Sensibly revolutionary" means revolutionary with a minority of non-revolutionary elements. - "Virtually equal or virtually identical" means, for a dimension, that it is equal or identical to within ± 5%. - "Approximately equal or approximately identical, for an angle, means equal or identical to within ±5°. - "Sensibly linear" generally means linearity deviations of ±5% in some areas Summary of the invention

[0007] For this purpose, the invention relates to a chuck assembly system, for a machine rotating around an axis A, such as a machining lathe, comprising a substantially cylindrical spindle plate of axis A, and a substantially cylindrical chuck plate of axis A, the spindle plate being able to be assembled by its rear end, with a spindle of the rotating machine and comprising at its front end, a first interface, the chuck plate comprising, at its rear end, a second interface, and its front end, of revolution around the axis, being able to accommodate a chuck, the first interface being complementary to the second interface.

[0008] Specific features or embodiments, usable alone or in combination, are: - The first interface comprises a first cone with axis A, and the second interface comprises a second cone with axis A, complementary to the first cone, in order to allow precise and repeatable centering between the two interfaces. - the first interface further comprises a first rotational indexing means, such as a finger, and the second interface further comprises a second indexing means complementary to the first indexing means, such as a point or radial cavity of the same diameter / width, - the first interface further comprises a first central bushing, of revolution about axis A, fixed to a cylinder of the rotating machine, movable in translation along axis A relative to a bore of axis A machined in a body of the spindle plate, comprising a first attachment means; the second interface further comprises a second central bushing, of revolution about axis A, movable in translation along axis A relative to the chuck plate, fixed to a hub of the chuck, comprising a second attachment means, capable of selectively attaching or detaching from the first attachment means, in order to be able to transmit a translational movement along axis A, from the cylinder to the hub of the chuck, - The first socket and the second socket are hollow, - the second attachment means comprises an external profile of the second socket comprising, from rear to front, a first inclined segment, substantially at 45°, centrifugal, forming an entry chamfer, followed by a second segment substantially perpendicular to axis A, centripetal, forming a stop, a third segment substantially parallel to axis A and a fourth segment, inclined, substantially at 45°, centrifugal, together forming a cavity, followed by a fifth segment substantially parallel to the axis and located at a diameter D substantially equal to the diameter at the end of the first segment; the first attachment means comprises an internal profile of the first socket, complementary to the external profile of the second socket, comprising, from front to rear, a first inclined segment, substantially at 45°, centripetal, forming an entry chamfer, followed by a second segment substantially parallel to the axis, located at a diameter substantially identical to it.by a value greater than diameter D, and the first latching means further comprises at least two, preferably at least six, slides, arranged in the first central socket, capable of being moved radially between a retracted position where they release diameter D and a latching position where they retract into diameter D so as to engage the cavity of the second socket, when the second socket is inserted into the first socket, . - a slide has an internal profile, comprising, from front to back, a first inclined segment, substantially at 45°, centripetal, adapted to cooperate with the fourth segment of the second sleeve, followed by a second segment substantially parallel to the axis and followed by a third segment substantially perpendicular to the axis, centrifugal, adapted to oppose axially the second segment of the second sleeve so as to axially hook the second sleeve relative to the first sleeve, - the bore has an internal profile, comprising from front to back, a first segment inclined at approximately 45°, centrifugal, followed by a second segment inclined substantially parallel to axis A and followed by a third segment inclined at approximately 45°, centripetal, and a slide has an external profile, comprising, from front to back, a first segment inclined at approximately 45°, centrifugal, followed by a second segment inclined substantially parallel to axis A and followed by a third segment inclined at approximately 45°, centripetal, the first segment being adapted to cooperate with the first segment of the bore, so as to retract the slide when the first sleeve is moved, relative to the body, forwards, and the third segment being adapted to cooperate with the third segment of the bore, so as to engage the slide in the cavity when the first sleeve is moved, relative to the body, backwards, - the chuck plate includes at least two secondary means of securing, preferably at least three, such as quarter-turn screws, and the spindle plate includes at least as many complementary primary means of securing, such as housings, - the rear end of a spindle plate is adapted to a rotating machine spindle format, - the front end of a chuck plate is adapted to a chuck format.

[0009] According to a second aspect of the invention, a method for changing a chuck using such a system, comprising the following steps: - placing the spindle plate in the docking configuration by moving, using a cylinder of the rotating machine, the first bushing forward, so as to retract the slides, - docking the chuck plate, preferably pre-equipped with a chuck, against the spindle plate, the second bushing engaging the first bushing, so as to place the cavities axially opposite the slides, - placing the spindle plate in the locking configuration by moving, using the cylinder of the rotating machine, the first bushing backward, so as to engage the slides in the cavities, - securing the chuck plate to the spindle plate by locking the first and second securing means. Brief description of the drawings

[0010] The invention will be better understood upon reading the following description, given solely by way of example, and with reference to the figures in the appendix in which:

[0011] [Fig-1] shows, in cut profile view, a spindle plate and a chuck plate before docking,

[0012] [Fig.2] shows, in a cutaway profile view, the spindle plate and the chuck plate of the [Fig.1] side by side,

[0013] [Fig.3] shows, in cut profile view, the spindle plate and the chuck plate of the [Fig.1] assembled,

[0014] [Fig.4] shows, in axial view, the spindle plate,

[0015] [Fig.5] shows, in schematic view, the external profile of the second socket,

[0016] [Fig.6] shows, in schematic view, the internal profile of the first socket and the internal profile of a slide,

[0017] [Fig.7] shows, in schematic view, the external profile of a slide in relation to the internal profile of the bore. Description of the implementation methods

[0018] With reference to figures 1, 2 or 3, the invention relates to a chuck assembly system 100, for a machine rotating around an axis A, such as a machining lathe.

[0019] The machine is positioned to the left of the figures and is not shown. It comprises at least one rotating spindle with axis A. To hold a workpiece during machining, the machine uses a chuck 11 positioned to the right of the figures, shown as a double-pointed axis line. Between the spindle of the rotating machine and the chuck 11 is a chuck clamping system, allowing for a change of chuck 11. This system must ensure a double coupling between the spindle and the chuck 11. On the one hand, a rotational coupling: the rotation of the spindle, around axis A, must be transmitted to the chuck 11. On the other hand, a translational coupling: the chuck 11 is controlled for tightening / loosening by a central hub moved in translation along axis A. A cylinder, present on the rotating machine, is capable of enabling this translation, provided that it is coupled with the central hub of the chuck 11.

[0020] According to the prior art, the assembly of a chuck onto a spindle of a rotating machine is achieved by means of a plate. This plate is substantially cylindrical with axis A. It is suitable for being assembled, at its rear end, with a spindle of the rotating machine and at its front end, to a chuck.

[0021] The difficulty lies in the fact that the chuck is mounted on the plate using a complex interface. Mounting a new chuck on the plate requires a lengthy process demanding considerable technical expertise to ensure proper concentricity.

[0022] In order to solve this problem, the invention proposes to provide a two-part plate, a spindle plate 110 and a chuck plate 120. The spindle plate 110 is adapted for fixing and coupling with the spindle, while the chuck plate 120 is adapted for fixing and coupling with the chuck 11.

[0023] By convention, in the present, the rear designates a part closer to the spindle, i.e. further to the left of figures 1-3 and the front designates a part further from the spindle, i.e. further to the right of figures 1-3. Similarly, it is agreed to designate by first an element relating to the spindle plate and by second an element relating to the chuck plate.

[0024] The system 100 according to the invention, comprises a spindle plate 110 and a chuck plate 120 suitable for being assembled together, in a simple, precise and repeatable manner, in order to allow a chuck change not requiring the technical skill or the time of a chuck change according to the prior art.

[0025] As illustrated in [Fig. 1], on the left, a spindle plate 110 is substantially cylindrical with axis A. Its rear end 111, substantially of revolution about axis A, is shaped to allow the spindle plate 110 to be assembled with a spindle of the rotating machine, so as to take over the rotary motion of the spindle and the translational motion of the cylinder. This is similar to the rear end of a plate of the prior art.

[0026] Furthermore, at its front end 112, substantially of revolution around the axis A, the spindle plate 110 presents a first interface 113.

[0027] As illustrated in [Fig.1], on the right, a chuck plate 120 is substantially cylindrical with axis A. Its front end 122, substantially of revolution about the axis A, is shaped to allow the assembly of the chuck plate 120 with a chuck 11.

[0028] In addition, at its rear end 121, substantially of revolution around the axis A, the chuck plate 120 has a second interface 123.

[0029] According to an important feature, the first interface 113 is complementary to the second interface 123.

[0030] Assembling / disassembling the first interface 113 with the second interface 123 allows a chuck 11 to be mounted / dismounted from a rotating machine. The fact that the first interface 113 and the second interface 123 are easy to assemble, quickly, precisely, and repeatably, allows for a rapid change of chuck 11. The spindle plate 110 provides the interface with the spindle of the rotating machine. Thus, a modification of the rear end 111 of a spindle plate allows the invention to be adapted to a specific type of rotating machine.

[0031] The chuck plate 120 provides the interface with the chuck 11. Thus, a modification of the front end 122 of a chuck plate allows the invention to be adapted to a specific type of chuck. Furthermore, while the assembly between the chuck plate 20 and a chuck 11 is complex and requires significant technical expertise, this drawback is minimized by the fact that this assembly only needs to be performed once: a chuck plate 120 is dedicated to a chuck 11, to which it remains fixed.

[0032] To describe the assembly and disassembly, [Fig. 1] illustrates the spindle plate 110 separated from the chuck plate 120, [Fig. 2] illustrates the two plates 110, 120 placed side by side, and [Fig. 3] illustrates them assembled. Disassembly involves reversing the assembly steps.

[0033] According to another feature, the first interface 113 comprises a first cone 18 with axis A, and the second interface 123 comprises a second cone 19 with axis A, complementary to the first cone 18. This feature allows for precise and repeatable centering between the two interfaces 113 and 123. The first cone 18 can be an external cone, as illustrated. In this case, the second cone 19 is an internal cone. Alternatively, the first cone 18 can be an internal cone. In this case, the second cone 19 is an external cone. The semi-angle at the apex of this cone can be arbitrary. Preferably, it is between 2 and 12°. Even more preferably, it is approximately 7°.

[0034] The preceding double cone 18, 19 ensures centering. According to another feature, the first interface 113 further comprises a first rotating indexing means 20, and the second interface 123 further comprises a second indexing means 21 complementary to the first indexing means 20. The first indexing means 20 or the second indexing means 21 may be a finger, such as the illustrated finger 20, substantially cylindrical. The second indexing means 21 or the first indexing means 20 is complementary. It may be a point cavity. In this case, the point cavity has a bore diameter substantially identical to the diameter of the finger. It may also be a substantially linear groove, preferably radial. In this case, the width of the groove has a width substantially identical to the diameter of the finger.

[0035] The double cone 18, 19 and the rotational indexing means contribute to simple, precise, and repeatable repositioning. A repeatability on the order of 6p is thus obtained with the system 100.

[0036] The double cone 18, 19 and the rotational indexing means, along with other fastening systems, help to secure the spindle plate 110 to the rotating chuck plate 120. The rotational movement of the spindle is transmitted to the spindle plate 110, which in turn transmits it to the chuck plate 120, which itself drives the chuck 11.

[0037] The system 100 must still transmit a translational movement, from a cylinder of the rotating machine, to a hub of the chuck 11, so that the rotating machine can control the tightening or loosening of the chuck 11.

[0038] For this purpose, the first interface 113 further includes a first central sleeve 2. This first central sleeve 2 is of revolution about the axis A. It can slide axially in a bore 22 of axis A made in the body 1 of the spindle plate 110.

[0039] The first sleeve 2 is adapted, from the rear, to interface with the cylinder of the rotating machine which can thus mobilize it in translation along the axis A.

[0040] Similarly, the second interface 123 also includes a second central sleeve 10. This second central sleeve 10 is of revolution about axis A. It can slide axially in a bore with axis A formed in the body 5 of the chuck plate 120.

[0041] The second sleeve 10 is adapted, from the front, to interface with a central means of the chuck 11, allowing the tightening / loosening to be controlled as it is mobilized in translation along the axis A.

[0042] In order to transmit the translational movement along the axis A of the cylinder to the chuck 11, it is necessary to couple the first sleeve 2 with the second sleeve 10, in translation.

[0043] For this purpose, according to another feature, the first sleeve 2 has a first hooking means, the second sleeve 10 has a second complementary hooking means, capable of selectively hooking or unhooking from the first hooking means, in order to be able to transmit a translational movement along the axis A of the cylinder to the hub of the chuck 11.

[0044] According to another feature, the first sleeve 2 and the second sleeve 10 are hollow. This highly advantageous feature allows the installation of a bar feeder, capable of feeding the chuck 11 with parts from the machine, through the inside of the sleeves.

[0045] According to another feature, the first attachment means is made by a particular internal profile of the first socket 2 and the second attachment means is made by a corresponding particular external profile of the second socket 10.

[0046] The details of the profiles and their interactions are detailed in the principle diagrams of figures 5 to 7.

[0047] The external profile of the second sleeve 10, as illustrated in [Fig. 5], comprises, from the rear, on the left of the figure, towards the front, on the right of the figure, a first segment 124 inclined at approximately 45°, centrifugal, in that it moves away from the axis A as one moves forward. This first segment 124 forms an entry chamfer. This first segment 124 is followed by a second segment 125 inclined approximately perpendicular to the axis A, centripetal. This second segment 125 forms a stop. A third segment 126, substantially parallel to the axis A, follows. A fourth segment 127, inclined at approximately 45°, centrifugal, follows. These three segments 125-127 together form a cavity 128. This is followed by a fifth segment 129 substantially parallel to the axis A. This fifth segment 129 is located at a diameter D substantially equal to the diameter reached at the end of the first segment 124.

[0048] The internal profile of the first sleeve 2, as illustrated in [Fig. 6], is complementary to the external profile of the second sleeve 10. The rear end of the second sleeve 10 is designed to be inserted into the front end of the first sleeve 2. The internal profile of the first sleeve 2 comprises, from front to rear, a first segment 114 inclined at approximately 45°, centripetal. This first segment 114 forms an entry chamfer. This first segment 114 is followed by a second segment 115 substantially parallel to axis A. This second segment 115 is located at a diameter substantially greater than, but equal to, diameter D.

[0049] The first attachment means further comprises at least two, preferably at least six, slides 3. These slides 3 are arranged in the first central sleeve 2. They are capable of being moved radially between a retracted position where they release the diameter D and an attachment position where they retract into the diameter D so as to engage the cavity 128 of the second socket 10, when the latter, the second socket 10, is inserted into the first socket 2.

[0050] In order to perform its locking function, a slide 3, according to another feature, has an internal profile, as illustrated in [Fig. 6], comprising, from front to back, a first segment 131 inclined at approximately 45°, centripetal, followed by a second segment 132 substantially parallel to the axis A, and followed by a third segment 133 substantially perpendicular to the axis A, centrifugal. The first segment 131 is adapted to cooperate with the fourth segment 127 of the second sleeve 10. The third segment 133 is adapted to oppose axially the second segment 125 of the second sleeve 10 so as to form an axial stop and to lock the second sleeve 10 and the second interface 123 relative to the first sleeve 2 and the first interface 113, in translation along the axis A.

[0051] The axial length 1 of a slide 3 is slightly less than the corresponding length L of a cavity 128.

[0052] It has been seen that the slides 3 can move radially between a docking position where they are retracted and release the diameter D and a hooking position where they enter the diameter D and the cavity 128.

[0053] For this purpose, according to another characteristic, more particularly illustrated in [Fig.7], the bore 22 has an adapted internal profile, complementary to the external profile of a slide 3.

[0054] According to another feature, the inner profile of the bore 22 comprises, from front to rear, a first segment 141 inclined at substantially 45°, centrifugal, followed by a second segment 142 substantially parallel to the axis A and followed by a third segment 143 inclined at substantially 45°, centripetal, and wherein a slide 3 has an outer profile, comprising, from front to rear, a first segment 151 inclined at substantially 45°, centrifugal, followed by a second segment 152 substantially parallel to the axis A and followed by a third segment 153 inclined at substantially 45°, centripetal, the first segment 151 being adapted to cooperate with the first segment 141 of the bore 22, so as to retract the slide 3 when the first sleeve 2 is moved forward relative to the body 1, and the third segment 153 being adapted to cooperate with the third segment 143 of bore 22,so as to engage the slide 3 in the cavity 128 when the first bushing 2 is moved, relative to the body 1, towards the rear.

[0055] The distance between the 1st segment 141 and the 3rd segment 143 of the bore profile 22 is greater than the distance between the 1st segment 151 and the 3rd segment 153 of the slide profile 3 of a set. This set can be on the order of 5 mm.

[0056] Once the first sleeve 2 has been attached to the second sleeve 10, the spindle plate 110 must be assembled with the chuck plate 120. For this purpose, according to another characteristic, the chuck plate 120 includes at least two, preferably at least three, secondary fastening means, such as quarter-turn screws 8, and the spindle plate 110 includes at least as many complementary primary fastening means, such as recesses 16. The screws 8 have a finned body 6. The recess 16 has a finned shape that allows the screw 8 to be inserted when aligned. After a quarter-turn rotation, the fin 6 is held captive in the recess 16. Springs 7 provide a certain degree of compliance to the assembly.

[0057] One of the advantages of the invention, by separating the plate into a spindle plate 110 on the one hand and a chuck plate 120 on the other hand, is to separate the interface adaptation on the spindle side on the one hand and on the chuck side on the other hand.

[0058] It is thus possible, according to another feature, to conform the rear end 111 of a spindle plate 110 to adapt it to a rotating machine spindle format.

[0059] It is also possible, according to another feature, to conform the front end 122 of a chuck plate 120 to adapt it to a chuck format 11. Each of the two adaptations being done independently of each other.

[0060] Advantageously, a chuck 11 is pre-assembled with a dedicated chuck plate 120, in order to simplify a change of chuck 11 by limiting / reducing it to a change of chuck plate 120. The technicality of the chuck / chuck plate assembly is then only supported once.

[0061] The invention further relates to a method for changing a chuck 11 using such a system. The spindle plate 110 is assumed to be mounted on the spindle of the rotating machine, with the first bushing 2 attached to the cylinder. If this is not the case, it must be mounted beforehand. Similarly, the chuck plate 120 is assumed to be assembled with a chuck 11. If this is not the case, it must be assembled beforehand.

[0062] The method comprises the following steps. In a first step, the spindle plate 110 is placed in the docking configuration. To do this, the first bushing 2 is moved forward, preferably by means of the rotating machine's cylinder. This forward movement of the first bushing 2, as detailed previously, causes the slides 3 to retract. This retraction frees the diameter D, allowing the nose of the second bushing 10 to be inserted into the opening of the first bushing 2. In a second step, the chuck plate 120 is positioned. For this, the chuck plate 120 is placed opposite the spindle plate 110, their axes A aligned, with the first interface 113 facing the second interface 123, as illustrated in [Fig. 1]. Then at least one of the plates 110, 120 is brought closer to the other by a translation about axis A, so that the second sleeve 10 engages the first sleeve 2, in depth, until the cavity 128 is axially aligned with the slides 3. During the docking, the fastening means are engaged with one another. Thus, the screws 6 are engaged in the housings 16, in the open orientation.

[0063] In a third step, the spindle plate 110 is placed in the locking configuration. For this, the first bushing 2 is moved rearward, preferably by means of the rotary machine's cylinder. This rearward movement of the first bushing 2, as detailed previously, results in the engagement of the slides 3 in the cavities 128.

[0064] With the chuck plate 120 pressed against the spindle plate 110 and the bushings 2 and 10 attached, it is possible, in a fourth step, to secure the chuck plate 120 to the spindle plate 110 by locking the first and second fastening means. This is done by turning the screws 6 a quarter turn so as to place them in the closed position.

[0065] The invention has been illustrated and described in detail in the drawings and the preceding description. This description is to be considered illustrative and given by way of example and not as limiting the invention to this single description. Numerous embodiments are possible. List of reference signs

[0066] 1: first body, 2: first socket, 3: slider, 4: flask, 5: second body, 6: fin, 7: Compliance element, 8: screw, 9: framing, 10: second socket, 11: chuck, 12: slide stop surface (segment 133), 13: 45° slope (segment 143) 14: abutment surface of cavity 128 (segment 125) 15: 45° slope (segment 141) 16: housing screw, 17: sliding housing, 18: first cone, 19: second cone, 20: first indexing method, 21: second indexing method, 22: bore, 100: assembly system, 110: spit tray, 111: rear end of the spindle plate, 112: front end of the spindle plate, 113: first interface, 114: 1st segment of the inner profile of the first socket, 115: 2nd segment of the inner profile of the first socket, 120: chuck plate, 121: rear end of the chuck plate, 122: front end of the chuck plate, 123: second interface, 124: 1st segment of the outer profile of the second socket, 125: 2nd segment of the outer profile of the second socket, 126: 3rd segment of the outer profile of the second socket, 127: 4th segment of the outer profile of the second socket, 128: cavity, 129: 5th segment of the outer profile of the second socket, 131: 1st segment of the internal profile of the slider, 132: 2nd segment of the inner profile of the slider, 133: 3rd segment of the inner profile of the slider, 141: 1st segment of the bore's internal profile, 142: 2nd segment of the bore's internal profile, 143: 3rd segment of the bore's internal profile, 151: 1st segment of the external profile of the slider, 152: 2nd segment of the external profile of the slider, 153: 3rd segment of the external profile of the slider, A: axis, D: diameter of the rings, 1: length of a slide, L: length of a cavity.

Claims

1. Demands A chuck assembly system (100) for a machine rotating about an axis (A), such as a machining lathe, characterized in that it comprises - a spindle plate (110) substantially cylindrical with axis (A), and a chuck plate (120) substantially cylindrical with axis (A), the spindle plate (110) being adapted to be assembled, at its rear end (111), with a spindle of the rotating machine and comprising at its front end (112), a first interface (113), the chuck plate (120) comprising, at its rear end (121), a second interface (123), and its front end (122), being adapted to accommodate a chuck (11), the first interface (113) being complementary to the second interface (123), - a first and a second attachment means, - a first and a second bushing, - the second attachment means having an external profile of the second socket (10) comprising, from rear to front, a first segment (124) inclined at approximately 45°, centrifugal, forming an entry chamfer, followed by a second segment (125) inclined at approximately 45° to the axis (A), centripetal, forming a stop, - a third segment (126) inclined at approximately 45° to the axis (A) and - a fourth segment (127), inclined at approximately 45°, centrifugal, together forming a cavity (128), followed by a fifth segment (129) inclined at approximately 45° to the axis (A) and located at a diameter (D) substantially equal to the diameter at the end of the first segment (124), where the first attachment means comprises an internal profile of the first socket (2), complementary to the external profile of the second socket (10), comprising, from front to rear, a first segment (114) inclined at approximately 45°, centripetal, forming a entry chamfer,followed by a second segment (115) substantially parallel to the axis (A), located at a diameter substantially identical, by value greater, to the diameter (D), and where the first attachment means further comprises at least two, preferably at least six, slides (3), arranged in the first central socket (2), capable of being moved radially between a retracted position where they release the diameter (D) and an attachment position where they retract into the diameter (D) in such a way, to engage the cavity (128) of the second socket (10), when the second socket (10) is inserted into the first socket (2). - a slide (3) having an internal profile, comprising, from front to back, - a first segment (131) inclined, substantially at 45°, centripetal, adapted to cooperate with the fourth segment (127) of the second socket (10), followed by a second segment (132) substantially parallel to the axis (A) and followed by a third segment (133) substantially perpendicular to the axis (A), centrifugal, adapted to oppose axially the second segment (125) of the second socket (10) so as to axially hook the second socket (10) relative to the first socket (2).

2. A system (100) according to the preceding claim, wherein the bore (22) has an internal profile comprising, from front to rear, a first segment (141) inclined at substantially 45°, centrifugal, followed by a second segment (142) inclined substantially parallel to the axis (A) and followed by a third segment (143) inclined at substantially 45°, centripetal, and wherein a slide (3) has an external profile comprising, from front to rear, a first segment (151) inclined at substantially 45°, centrifugal, followed by a second segment (152) inclined substantially parallel to the axis (A) and followed by a third segment (153) inclined at substantially 45°, centripetal, the first segment (151) being adapted to cooperate with the first segment (141) of the bore (22) so as to retract the slide (3) when the first sleeve (2) is displaced, relative to the body (1), forwards, and the third segment (153) being able to cooperate with the third segment (143) of the bore (22),so as to engage the slide (3) in the cavity (128) when the first sleeve (2) is moved rearward relative to the body (1).

3. System (100), according to the preceding claim, wherein the first interface (113) comprises a first cone (18) with axis (A) and wherein the second interface (123) comprises a second cone (19) with axis (A) complementary to the first cone (18), in order to allow precise and repeatable centering between the two interfaces (113, 123).

4. A system (100) according to any one of the preceding claims, wherein the first interface (113) further comprises a first rotational indexing means (20), such as a finger, and wherein the second interface (123) further comprises a second means indexing (21) complementary to the first indexing means (20), such as a point or radial cavity, of the same diameter / width.

5. System (100), according to any one of the preceding claims, wherein the first interface (113) further comprises a first central bushing (2), of revolution about the axis (A), integral with a cylinder of the rotating machine, movable in translation about the axis (A) relative to a bore (22) of axis (A) cut in a body (1) of the spindle plate (110), comprising a first attachment means, wherein the second interface (123) further comprises a second central bushing (10), of revolution about the axis (A), movable in translation about the axis (A) relative to the chuck plate (120), integral with a hub of the chuck (11), comprising a second attachment means, capable of selectively attaching or detaching from the first attachment means, in order to be able to transmit a translational movement about the axis (A), from the cylinder to the hub of the chuck (11).

6. System (100), according to the preceding claim, wherein the first socket (2) and the second socket (10) are hollow.

7. System (100), according to any one of the preceding claims, wherein the chuck plate (120) further comprises at least two second means of securing, preferably at least three, such as quarter-turn screws (8), and wherein the spindle plate (110) comprises at least as many first complementary means of securing, such as housings (16).

8. System (100), according to any one of the preceding claims, wherein the rear end (111) of a spindle plate (110) is adapted to a rotating machine spindle format.

9. System (100), according to any one of the preceding claims, wherein the front end (122) of a chuck plate (120) is adapted to a chuck format (11).

10. A method for changing a chuck (11) by means of a system according to any one of the preceding claims, comprising the following steps: - placing the spindle plate (110) in the docking configuration by moving, by means of a cylinder of the rotating machine, the first bushing (2) forward, so as to retract the slides (3), - docking the chuck plate (120), preferably pre-equipped with a chuck (11), against the spindle plate (110), the second socket (10) engaging the first socket (2), so as to place the cavities (128) axially opposite the slides (3), - placement of the spindle plate (110) in the locking configuration by moving, using the cylinder of the rotating machine, the first bushing (2) backwards, so as to engage the slides (3) in the cavities (128), - securing the chuck plate (120) to the spindle plate (110) by locking the first and second means of securing.

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