Multi-station turret lower die library

Abstract

The utility model relates to the technical field of turret lower die libraries, in particular to a multi-station turret lower die library and riveting center which comprises a mounting seat, the mounting seat comprises a bottom plate used for being fixedly connected with the riveting center, the mounting seat is vertically provided with a rotating shaft and a rotation driving mechanism for driving the rotating shaft to rotate, and the rotating shaft is fixedly connected with a rotating disc. A plurality of lower die mounting holes are formed in the rotating disc around the central axis of the rotating disc, each lower die mounting hole is correspondingly provided with a lower die capable of moving up and down along the corresponding lower die mounting hole, a lower die hole is formed in the top of each lower die, the mounting seat is provided with a lifting mechanism and an auxiliary supporting frame, and a positioning plate located above the rotating disc is arranged above the auxiliary supporting frame; a positioning hole is formed in the positioning plate corresponding to the die outlet; the top of the lower die can movably penetrate through the positioning hole and is matched with the lower part of the upper pressing die for riveting; the device has the advantages that high-precision control over the ejection position of the lower die library of the turret is achieved, and the machining precision and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of turret lower die library, in particular to a multi-station turret lower die library. BACKGROUND

[0002] The numerical control turret riveting center, simply speaking, is a mechanism that lays flat the plate (or other accessories) and then sends it to the rivet mechanism under the driving of the double-shaft or multi-shaft material transfer mechanism, so that the plate is moved to the rivet mechanism one by one, and the riveting process is completed in turn or according to the program. For large plates, the riveting pressure can usually reach tons or more.

[0003] At present, the existing riveting center includes a material transfer mechanism, an upper pressing die, a riveting center structure, and a lower pressing die. The material transfer mechanism grabs and transfers the plate to the rivet area so that the plate is located between the upper pressing die and the lower pressing die. The riveting center structure drives the upper pressing die to press down, and the upper pressing die corresponds to the downward riveting. The upper pressing die cooperates with the lower pressing die to realize the riveting of the plate.

[0004] However, the lower pressing die of the existing riveting center is usually fixed, but different plates may need to rivet different specifications or shapes of rivets, which requires stopping and manually replacing the lower pressing die. This process not only takes time, but also reduces production efficiency. SUMMARY

[0005] In order to realize the quick replacement of the turret lower die library and improve the processing precision and production efficiency, the present application provides a multi-station turret lower die library.

[0006] The multi-station turret lower die library provided by the present application adopts the following technical scheme:

[0007] A multi-station turret lower die library is used for being installed below the upper pressing die of a riveting center. The multi-station turret lower die library comprises a mounting seat, the mounting seat comprises a bottom plate for fixed connection with the riveting center, the mounting seat is vertically provided with a rotating shaft and a driving mechanism for driving the rotating shaft to rotate, the rotating shaft is fixedly connected with a rotating disc, a plurality of die mounting ports are arranged around the center shaft of the rotating disc on the rotating disc, each die mounting port is correspondingly provided with a lower die capable of moving up and down along the die mounting port, a lower die hole is arranged at the top of the lower die, the mounting seat is provided with a lifting mechanism, the lifting mechanism comprises a connecting block for lifting the lower die to an ejection port, an auxiliary support frame is further arranged on the mounting seat, a limiting plate located above the rotating disc is arranged above the auxiliary support frame, a limiting hole is arranged at the position corresponding to the ejection port of the limiting plate, and the top of the lower die can be movably penetrated through the limiting hole to the lower side of the upper pressing die for riveting.

[0008] Preferably, the lifting mechanism comprises a connecting block, the connecting block is provided with a supporting slot, the supporting slot is located directly below the die outlet, the supporting slot forms a top slot and a side slot on the connecting block, the bottom of the lower die is fixed with a insertion slot, the side slot of the supporting slot is used for inserting the insertion slot, and the top slot of the supporting slot is used for protruding the lower die.

[0009] Preferably, the lifting mechanism further comprises a mounting frame and a lifting driver, the mounting frame is mounted on the side wall of the mounting seat, the lifting driver is fixed on the mounting frame, the lifting driver is arranged in the vertical direction, and the connecting block is fixed on the piston rod of the lifting driver.

[0010] Preferably, the supporting mechanism comprises a vertically arranged sliding support block, when the connecting block is lifted to the highest position, the sliding support block is displaced to directly below the connecting block to provide reinforced support, and when the connecting block is lowered, the sliding support block is displaced to the outside of the die outlet.

[0011] Preferably, the supporting mechanism further comprises a reinforcing seat, the reinforcing seat is fixed on the upper surface of the mounting frame, the sliding support block is located above the reinforcing seat and slides in the horizontal direction, and when riveting, the reinforcing seat abuts against the sliding support block to assist the sliding support block in supporting the connecting block.

[0012] Preferably, the mounting seat is provided with a plug-in alignment mechanism, the plug-in alignment mechanism comprises a limiting gear and a limiting block, the limiting gear is coaxially arranged on the rotating shaft, the limiting block is slidingly arranged on the mounting seat, the limiting block is plug-in matched with the tooth groove of the limiting gear, and the shape of the limiting block is matched with the shape of the insertion slot of the limiting gear.

[0013] Preferably, the surface of the round pad plate is provided with a mold changing hole, the mold changing hole penetrates through the upper and lower surfaces of the round pad plate, and a hole cover is slidingly arranged in the mold changing hole and used for plugging the mold changing hole.

[0014] Preferably, the hole wall of the mold changing hole is provided with a guide block, the side wall of the hole cover is provided with a guide slot, and the guide block is slidingly matched with the guide slot.

[0015] Preferably, the top cover of the multi-station rotary tower lower die library is provided with a protective cover.

[0016] In summary, the present application has at least one of the following beneficial technical effects:

[0017] 1. The lower die library of the present application is provided with a multi-station rotary tower, which can quickly switch to a lower die with a corresponding lower die hole according to different riveting specifications, without the need for manual replacement during shutdown, and the conversion is fast and flexible, which significantly improves the production efficiency.

[0018] 2. The integration of automatic die replacement and intelligent recognition technology simplifies the operation process, reduces manual intervention, and reduces operation complexity. By reducing downtime and labor costs, and improving equipment utilization, production costs can be effectively reduced; BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the multi-station turret die library of embodiment 1 of the present application.

[0020] Figure 2 is a schematic diagram of the overall structure after the protective cover is removed in embodiment 1 of the present application.

[0021] Figure 3 is a diagram of the cooperation between the rotary drive mechanism and the round pad, the shaft in embodiment 1 of the present application.

[0022] Figure 4 is a diagram of the cooperation between the plug-in alignment mechanism and the shaft in embodiment 1 of the present application.

[0023] Figure 5 is a diagram of the cooperation between the lifting mechanism, the supporting mechanism and the lower die in embodiment 1 of the present application.

[0024] Figure 6 is a schematic diagram of the overall structure of the riveting center in embodiment 1 of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS: 1, mounting seat; 11, bottom plate; 114, protective cover; 1141, let go of hole; 12, vertical plate; 13, mounting plate; 14, round pad; 141, die replacement hole; 142, hole cover; 143, baffle; 2, shaft; 21, turntable; 211, lower die mounting hole 211; 31, lower die seat; 32, lower die; 321, lower die hole; 4, rotary drive mechanism; 41, drive motor; 42, precision synchronous belt; 5, plug-in alignment mechanism; 51, limit gear; 52, limit block; 53, limit cylinder; 6, lifting mechanism; 61, mounting frame; 62, lifting driver; 63, connecting block; 631, bearing clamping groove; 632, lifting slider; 8, supporting mechanism; 81, control cylinder; 82, sliding support block; 83, reinforcing seat; 10a, machine body; 10b, material moving mechanism; 10c, riveting center; 10d, upper die. DETAILED DESCRIPTION

[0026] The following will be described in detail in combination with the Figures 1-6 The present application will be further described in detail.

[0027] Embodiment 1:

[0028] The embodiments of the present application disclose a multi-station turret die library. Referring to Figure 1 and Figure 2The utility model provides a multi -position turret lower die library for installing under the upper pressure die of riveting pressure center to cooperate with the upper pressure die and realizes riveting pressure to plate, wherein the multi -position turret lower die library of the embodiment of the utility model carries out axial change lower die and longitudinal lifting lower die two processes, and then can realize multi -position change lower die to adapt to riveting processing of different needs.

[0029] In the embodiment, the top of the multi -position turret lower die library is fixed with a protective cover 114, which is used to cover the structure for axial change lower die and longitudinal lifting lower die on the multi -position turret lower die library, that is, the protective cover 114 constitutes the shell of the multi -position turret lower die library. In addition, the top of the protective cover 114 is provided with a gap hole 1141 for providing space conditions for longitudinal lifting lower die.

[0030] Specifically, a multi -position turret lower die library comprises a mounting seat 1, the mounting seat 1 comprises a bottom plate 11, a mounting plate 13 and a vertical plate 12, the bottom plate 11 and the mounting plate 13 are parallel to each other, the number of the vertical plate 12 is two, and the two vertical plates 12 are fixed between the bottom plate 11 and the mounting plate 13 to form a rectangular frame structure, the bottom plate 11 is used for fixed connection with the riveting center, and the mounting plate 13 is used for connecting the assembly for axial change lower die.

[0031] Specifically, the mounting plate 13 is provided with a rotating shaft 2, the rotating shaft 2 is arranged in the vertical direction, one end of the rotating shaft 2 extends upwards from the bottom plate 11, and the upward extending part of the rotating shaft 2 is coaxially fixed with a rotating disc 21, the rotating disc 21 is horizontally arranged, a plurality of lower die mounting holes 211 are arranged around the central shaft of the rotating disc 21, in the embodiment, the lower die mounting holes 211 are preferably arranged as fourteen, the fourteen lower die mounting holes 211 are arranged in the circumferential direction around the central axis of the rotating shaft 2, each lower die mounting hole 211 is correspondingly provided with a lower die 32 capable of moving up and down along the lower die mounting hole 211, the lower die 32 is parallel to the rotating shaft 2, and the top of the lower die 32 is provided with a lower die hole 321.

[0032] It should be noted that in the initial state of the embodiment of the utility model, the position corresponding to one of the lower die mounting holes 211 is the die outlet position of the multi -position turret lower die library in the embodiment of the utility model, and since the lower die hole 321 is used for cooperating with the upper pressure die to rivet rivets of different shapes, the shape of the lower die hole 321 at the top of each lower die 32 is different, and correspondingly, the rotating shaft 2 is controlled to rotate to make the rotating disc 21 rotate, so that the required type of lower die 32 can be transferred to the corresponding die outlet position, realizing the operation of axial change lower die.

[0033] Referring to Figure 2 and Figure 3Correspondingly, in order to realize the axial die changing operation described above, in the embodiment of the present application, a rotating driving mechanism 4 is correspondingly arranged on the mounting seat 1.

[0034] Specifically, the rotating driving mechanism 4 includes a driving motor 41 and a precision synchronous belt 42. The outer side of the mounting plate 13 is fixedly provided with a connecting seat 111, which is horizontally arranged and formed by two plate bodies that are fixedly connected by overlapping. The driving motor 41 is installed on the connecting seat 111, and the output shaft of the driving motor 41 is provided with a synchronous wheel penetrating downward along the vertical direction of the connecting seat 111.

[0035] Correspondingly, one end of the rotating shaft 2 penetrates downward through the mounting plate 13 and is connected with the synchronous wheel. The precision synchronous belt 42 is connected between the output shaft of the driving motor 41 and the rotating shaft 2, and is used to realize the synchronous rotation between the output shaft of the driving motor 41 and the rotating shaft 2.

[0036] In the embodiment, the precision synchronous belt 42 is usually made of high-strength material such as steel belt, and has precise tooth shape processed thereon for precise meshing with the tooth shape of the synchronous wheel. The connection mode of the precision synchronous belt 42 is realized by two synchronous wheels, one of which is connected with the output shaft of the driving motor 41, and the other of which is connected with the rotating shaft 2.

[0037] Therefore, when the driving motor 41 is started, the output shaft of the driving motor 41 drives the synchronous wheel connected therewith to rotate, and through the precise meshing of the tooth shape of the precision synchronous belt 42 with the tooth shape of the synchronous wheel, power is transmitted to the synchronous wheel on the rotating shaft 2, so as to drive the rotating shaft 2 to rotate. The rotating disc 21 correspondingly rotates with the rotating shaft 2 to realize the axial die changing operation.

[0038] It should be noted that in other embodiments, a servo motor can be used in cooperation with a precision gear set to drive the rotating shaft 2 to rotate.

[0039] Referring to Figure 2 and Figure 4 On the other hand, in order to further improve the positioning accuracy of the lower die 32 and realize stable switching of the lower die 32, the following scheme is also adopted in the embodiment of the present application.

[0040] Specifically, the mounting seat 1 is provided with a plug-in alignment mechanism 5, which includes a limiting gear 51, a limiting block 52 and a limiting cylinder 53. The limiting gear 51 is coaxially arranged on the rotating shaft 2 and specifically located above the bottom plate 11.

[0041] Further, the limiting block 52 is arranged on the upper surface of the base plate 11 in a horizontal sliding manner, the shape of the limiting block 52 is matched with the shape of the slot of the limiting gear 51, the limiting cylinder 53 is correspondingly arranged on the upper surface of the base plate 11, the piston rod of the limiting cylinder 53 is arranged towards the limiting gear 51, and the limiting block 52 is correspondingly fixed on the end of the piston rod of the limiting cylinder 53, so that the limiting block 52 is inserted into the slot of the limiting gear 51 under the driving of the piston rod of the limiting cylinder 53.

[0042] Correspondingly, after the rotation driving mechanism 4 drives the rotating shaft 2 and the rotating disc 21 to realize the switching of the lower mold 32, the limiting block 52 is inserted into the slot of the limiting gear 51 under the control of the limiting cylinder 53, the rotation freedom of the rotating shaft 2 is limited, the stability after the switching of the lower mold 32 is enhanced, and the situation that the riveting force is transmitted to the rotating shaft 2 through the lower mold 32 in the subsequent riveting process is reduced, so that the deflection of the rotating shaft 2 occurs. Correspondingly, the limiting block 52 is also clamped with the limiting gear 51, which indirectly supports the rotating shaft 2.

[0043] Referring to Figure 2 and Figure 3 Further, the mounting seat 1 is provided with a circular pad plate 14 on the top, the circular pad plate 14 is located below the rotating disc 21, the circular pad plate 14 is arranged in a circular ring shape and around the outside of the rotating shaft 2, the circular pad plate 14 is parallel to the rotating disc 21, and the upper surface of the circular pad plate 14 is in contact with the bottom of the lower mold 32. That is, when the rotating shaft 2 drives the rotating disc 21 to rotate, the circular pad plate 14 provides bearing for the lower mold 32, the top of the lower mold 32 is subjected to a force, and thus the lower mold 32 moves with the rotating disc 21.

[0044] Further, the surface of the circular pad plate 14 is provided with a mold changing hole 141, the mold changing hole 141 penetrates the upper and lower surfaces of the circular pad plate 14, a hole cover 142 is arranged in the mold changing hole 141 in a sliding manner, the hole cover 142 slides in a horizontal direction, the upper surface of the hole cover 142 is flush with the upper surface of the circular pad plate 14, and the hole cover 142 is used to block the mold changing hole 141.

[0045] Therefore, when the lower mold 32 needs to be replaced, first, the rotating shaft 2 drives the rotating disc 21 to rotate, so that the circular pad plate 14 provides bearing for the lower mold 32, and the stability of the lower mold 32 during the mold changing process is ensured. The top of the lower mold 32 is subjected to a force and moves with the rotating disc 21, at this time, the lower mold 32 is separated from the rotating disc 21, and the lower mold 32 is convenient to take out. The mold changing hole 141 on the circular pad plate 14 can be conveniently opened or closed through the horizontal sliding of the hole cover 142, so that the lower mold 32 can be quickly replaced.

[0046] Further, the hole wall of the mold changing hole 141 is provided with a guide block, the sidewall of the hole cover 142 is provided with a guide groove, and the guide block and the guide groove slide fit.

[0047] In addition, the hole wall of the die changing hole 141 is provided with a guide block, the side wall of the hole cover 142 is provided with a guide groove, the guide block and the guide groove are in sliding cooperation, the accurate sliding of the hole cover 142 is ensured, the deviation in the die changing process is avoided, and the efficiency and safety of the die changing are improved.

[0048] Further, the side wall of the round base plate 14 is fixed with a baffle plate 143 through a bolt, the baffle plate 143 is located on one side of the hole cover 142 and abuts against the hole cover 142, so that the baffle plate 143 plays a limiting and fixing role, and indirectly provides the connection strength between the hole cover 142 and the die changing hole 141.

[0049] To sum up, after the axial die 32 is completed through the above structure, the multi-station turret in the embodiment further adopts the following scheme to realize the subsequent longitudinal lifting of the die 32.

[0050] Referring to Figure 2 and Figure 5 Specifically, the mounting seat 1 is provided with a lifting mechanism 6, the lifting mechanism 6 includes a mounting frame 61, a lifting driver 62 and a connecting block 63, the mounting frame 61 is fixed vertically to the side wall of the mounting plate 13, the lifting driver 62 is fixed to the mounting frame 61, and the output end of the lifting driver 62 is vertically downward. Correspondingly, the connecting block 63 is fixed with the output end of the lifting driver 62.

[0051] It should be noted that the lifting driver 62 can be a driving cylinder or a servo motor, and in the embodiment, the servo motor is preferred. By adopting the servo motor, the servo motor cooperates with the linear module, and the servo motor can be programmed to descend to 10%, 30% or 50% of the stroke, meeting the motion requirements.

[0052] Looking back Figure 4 and Figure 5 Correspondingly, the connecting block 63 is provided with a supporting clamping groove 631, the supporting clamping groove 631 is located directly below the die outlet, the supporting clamping groove 631 forms a top slot and a side slot on the connecting block 63 for connecting with the end of the lower die 32, and the bottom of the lower die 32 is fixed with a slot, the side slot of the supporting clamping groove 631 is used for inserting the slot, and the top slot of the supporting clamping groove 631 is used for protruding the lower die 32.

[0053] When the output end of the lifting driver 62 is in a retracted state, the connecting block 63 is located at the uppermost position of the displacement stroke, the slot on one of the lower dies 32 is located in the supporting clamping groove 631, and the corresponding lower die 32 is in a die ejection state, i.e. the lower die 32 is lifted upward to a machining position.

[0054] When the axial mold changing is needed, the lifting driver 62 is started, the output end of the lifting driver 62 is extended, the connecting block 63 is driven to move downward, because the slot is clamped with the supporting slot 631, the lower mold 32 in the mold ejection state is moved downward, when the connecting block 63 moves to the lowermost position of the displacement stroke, fourteen groups of lower molds 32 are aligned, at this time, the driving cylinder is started to rotate the rotating disc 21, the slot originally in the supporting slot 631 is moved out of the supporting slot 631 due to the axial rotation of the corresponding lower mold 32, and the slot of the corresponding next lower mold 32 enters the supporting slot 631, at this time, the lifting driver 62 is controlled to act again, the output end of the lifting driver 62 is retracted, the connecting block 63 is driven to move upward, so that the slot is lifted, and the vertical lifting of the corresponding lower mold 32 is realized.

[0055] In addition, during the riveting process, because the connecting block 63 is used to support the lower mold 32, the force of the upper pressing die acting on the lower mold 32 is further transmitted to the connecting block 63, in order to improve the stability and supporting force of the lifting mechanism 6, the following scheme is also adopted in the embodiment of the application.

[0056] Specifically, referring to Figure 2 and Figure 5 A multi-station turret lower mold magazine further comprises a top supporting mechanism 8, the top supporting mechanism 8 is arranged below the rotating disc 21 and can be horizontally displaced relative to the mounting plate 13, the top supporting mechanism 8 comprises a control cylinder 81 and a vertically arranged sliding support block 82, the control cylinder 81 is installed on one side of the mounting plate 13, the control cylinder 81 is arranged in the horizontal direction, one end of the sliding support block 82 is fixed vertically to the end of the piston rod of the control cylinder 81, and the vertical part of the sliding support block 82 can be driven to be below or away from the supporting slot 631 of the connecting block 63. Specifically, when the connecting block 63 is lifted to the highest position, the sliding support block 82 is displaced to be below the connecting block 63 to provide reinforced support, when the connecting block 63 is lowered, the sliding support block 82 is displaced to the outside of the mold ejection port.

[0057] Further, the top supporting mechanism 8 further comprises a reinforcing seat 83, the reinforcing seat 83 is fixed on the upper surface of the mounting plate 13, the sliding support block 82 is above the reinforcing seat 83 and slides in the horizontal direction, during riveting, the reinforcing seat 83 abuts against the bottom end of the vertical part of the sliding support block 82 to assist the sliding support block 82 in supporting the connecting block 63, at this time, the lower mold 32 and the vertical part of the sliding support block 82 are on the same vertical line, and the reinforcing seat 83 provides reinforced support to support the huge impact force of the upper pressing die during riveting.

[0058] Therefore, the reinforcing seat 83 cooperates with the sliding support block 82 to provide additional support for the connecting block 63, especially during the riveting operation, to ensure the stability and strength of the connecting block 63 and prevent structural deformation caused by heavy load or impact. In addition, the cooperation of the reinforcing seat 83 and the sliding support block 82 optimizes the force transmission path and ensures uniform distribution of force, reducing the occurrence of local excessive force.

[0059] It should be noted that in this embodiment, when the lifting mechanism 6 and the supporting mechanism 8 act on one of the lower dies 32 to achieve supporting, the remaining lower dies 32 remain in their original positions, achieving single supporting of the lower dies 32 and facilitating control of the lower dies 32 to move out of the cutter. At the same time, in order to cooperate with the work of the feeding platform of the riveting center, when the lifting mechanism 6 controls the lower dies 32 to lift and lower, after completing riveting, if the feeding platform remains stationary, in order to smoothly feed the plate, the lifting mechanism 6 can control the lower dies 32 to move downward by a certain distance, but it is not necessary to move to the bottom of the stroke. In addition, the stroke of the lower dies 32 controlled by the lifting mechanism 6 is determined according to the actual working conditions, thereby improving the flexibility and adaptability of the control of the lifting mechanism 6.

[0060] Referring to Figure 6 In another aspect, the present application also discloses a riveting center, comprising a machine body 10a and a multi-station turret lower die magazine as described above, the multi-station turret lower die magazine is fixedly installed on the machine body 10a by the bottom plate 11, the machine body 10a is provided with a material moving mechanism 10b, a riveting center structure 10c and an upper die 10d, the material moving mechanism 10b is used to realize the transfer and movement of the plate on the production line, the riveting center structure 10c drives the upper die 10d to move in the vertical direction, and the upper die 10d is located above the multi-station turret lower die magazine, and the upper die 10d cooperates with the multi-station turret lower die magazine to realize the riveting of the plate.

[0061] Correspondingly, the riveting center positions the plate above the multi-station turret lower die magazine through the material moving mechanism 10b, uses high-precision lower die switching and positioning, cooperates with the vertical movement of the upper die 10d to realize efficient and accurate riveting of the plate, the whole process is highly automated, ensures the continuity and efficiency of processing, reduces the labor cost, and improves the production quality and safety.

[0062] Embodiment 2:

[0063] Different from embodiment 1, the side wall of the turntable 21 is provided with an induction groove, and a proximity switch is installed on the outside of the induction groove, the proximity switch is flush with the turntable 21, the proximity switch is used to sense the position of the induction groove, and the proximity switch is electrically connected with the equipment connected with the multi-station turret lower die magazine in the present application.

[0064] Therefore, when the driving motor 41 controls the rotating disc 21 to rotate by a certain angle, the rotating disc 21 realizes several times of changing the die, until the proximity switch senses the position of the sensing groove of the rotating disc 21, and then a signal can be transmitted to the external equipment of the multi-station turret die library connected therewith to control the driving motor 41 to stop working. At this time, the rotating disc 21 returns to the initial position, realizes the resetting of the rotating disc 21, and is convenient for the accuracy of the next change of the die.

[0065] Further, the upper pressing die of the riveting center will have a great impact on the riveting die of the lower pressing die during the pressing process. For the riveting center of the thick steel plate, the conventional pressure can reach 8 tons or more, so the lower die on the lower pressing die may shake due to the excessive pressure. For the embodiment of the present application, after the above-mentioned axial change of the die and the longitudinal lifting of the die are completed, the problem of excessive riveting pressure affecting the die is solved, and the following scheme is adopted accordingly.

[0066] Specifically, the vertical direction of the mounting plate 13 is fixedly provided with an auxiliary support frame, the top of the auxiliary support frame is provided with a positioning plate located above the rotating disc 21, the positioning plate is horizontally arranged, the top end of the positioning plate is provided with a mounting hole 712 corresponding to the rotating shaft, and the positioning plate is provided with a positioning hole corresponding to the position of the die outlet. The top of the lower die 32 can be movably penetrated through the positioning hole to the lower side of the upper pressing die for riveting. In addition, the proximity switch is correspondingly mounted on the side wall of the auxiliary support frame. Therefore, during the riveting process, the positioning plate and the rotating disc 21 serve as two fixed points of the lower die 32, which can ensure that the horizontal position of the lower die 32 will not be displaced, and further ensure the machining precision.

[0067] Further, in the embodiment, the lower die 32 is externally sleeved with a lower die seat, the upper end of the lower die seat is open and is provided with a mounting cavity for inserting the lower die 32, the lower end of the lower die seat is connected with the connecting block 63, the lower die 32 is partially inserted into the mounting cavity, and the lower die hole 321 is arranged at the upper end of the lower die 32. In addition, the insertion slot is correspondingly fixed to the bottom of the lower die seat.

[0068] In addition, in order to improve the stability of the horizontal movement of the sliding support block 82, the upper surface of the bottom plate 11 is fixedly provided with a second sliding rail, the side wall of the sliding support block 82 is fixedly provided with a sliding connecting block, the piston rod of the control cylinder 81 is fixedly connected with the side wall of the sliding connecting block, and the sliding connecting block is slidably arranged on the second sliding rail in the horizontal direction, so as to limit the movement direction of the sliding support block 82, so that the sliding support block 82 can only slide in the horizontal direction, and the movement stability of the sliding support block 82 is indirectly improved.

[0069] On the other hand, due to the need for rapid switching of the lower mold 32, the connecting block 63 and the sliding block 82 have a high speed during the movement process, which may cause the piston rod of the lifting driver 62 and the control cylinder 81 to vibrate due to rapid contraction, affecting the service life. To solve the above problems, the embodiments of the application correspondingly adopt the following technical solutions.

[0070] The side wall of the mounting frame 61 is fixed with a buffer, which is coaxially arranged with the output end of the lifting driver 62. When the output end of the lifting driver 62 is retracted by a certain length, the connecting block 63 moves upward by a distance and abuts against the buffer, and the buffer buffers the connecting block 63.

[0071] In addition, as shown in Figure 2 The mounting plate 13 is fixed with a buffer block made of silica gel with certain buffering performance, and the buffer block is provided with two buffer blocks corresponding to the two ends of the sliding connecting block movement stroke. When the control cylinder 81 controls the sliding connecting block to move a distance, the sliding connecting block contacts the buffer block, and the buffer block corresponds to buffer.

[0072] Further, in the above longitudinal lifting lower mold process, in order to improve the stability of the lower mold 32 in the vertical direction, the embodiments of the application also adopt the following scheme.

[0073] Specifically, the rotating disc 21 is embedded with a reinforcing sleeve ring, and the lower mold mounting hole 211 is correspondingly arranged on the reinforcing sleeve ring. The lower mold seat is movably penetrated through the reinforcing sleeve ring, and the side wall of the reinforcing sleeve ring is fixed with a limiting pin. The outer side wall of the lower mold seat is provided with a limiting slot in the vertical direction, and the limiting pin relatively slides in the limiting slot.

[0074] Therefore, the relative sliding of the limiting pin in the limiting slot limits the lateral movement of the lower mold seat, ensures the stability of the lower mold 32 in the vertical direction, reduces the shaking of the lower mold 32 during lifting, and improves the stability and accuracy of the lower mold 32 in the vertical direction.

[0075] In addition, in addition to the cooperation of the limiting pin and the limiting slot, in the embodiments of the application, the side wall of the mounting frame 61 is provided with a lifting slide rail in the vertical direction, and the side wall of the connecting block 63 is fixed with a lifting slide block. The lifting slide block is slidably arranged on the lifting slide rail in the vertical direction, and the lifting slide rail limits the lateral movement of the connecting block 63.

[0076] Due to the cooperation of the lifting slide rail and the lifting slide block, the lateral movement of the connecting block 63 is limited, and the stability of the connecting block 63 in the vertical direction is ensured. Further, the limiting pin and the limiting slot jointly act on the structure formed by the combination of the connecting block 63 and the lower mold 32 in the vertical direction, thereby indirectly improving the stability and accuracy of the lower mold 32 in the vertical direction.

[0077] The implementation principle of the multi-station turret lower die library of the embodiment of the application is as follows: at the beginning of work, the rotating disc 21 of the turret lower die library is located at an initial position; when it is required to process riveted plate parts of different types, the rotating drive mechanism 4 is started, the rotating drive mechanism 4 drives the rotating shaft 2 and the rotating disc 21 to rotate, the required lower die 32 is rotated to a processing position, the lower die 32 is moved upward under the action of the lifting mechanism 6, so that the upper pressing die on the riveting center can cooperate with the multi-station turret lower die library in the application to perform the rivet pressing operation, by controlling the rotation of the rotating disc 21, different lower dies 32 can be ejected, therefore, the multi-station turret lower die library in the application can realize the accurate and rapid switching of the pressing dies of multiple different types of rivets, which lays a solid foundation for realizing accurate automatic intelligent rivet pressing.

[0078] In the riveting process, the pressure of the upper pressing die of the conventional riveting center will have a great impact on the riveting lower die of the lower pressing die, and the conventional pressure can reach 8 tons or more. In the riveting process, the positioning plate and the rotating disc 21 are equivalent to two fixed points of the lower die 32, which can ensure that the horizontal position of the lower die 32 will not be displaced, and the movement ensures the processing accuracy.

[0079] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A multi-station turret lower mold storage unit, characterized in that, The multi-station turret lower die magazine, designed for installation below the pressing die on a riveting center, includes a mounting base (1). The mounting base (1) includes a base plate (11) for fixed connection with the riveting center. The mounting base (1) is vertically provided with a rotating shaft (2) and a driving mechanism (4) for driving the rotating shaft (2) to rotate. The rotating shaft (2) is fixedly connected to a turntable (21). The turntable (21) has several die mounting ports (211) arranged around its central axis. Each die mounting port (211) is correspondingly provided with a lower die (32) that can move up and down along the die mounting port (211). The lower die (32) has a lower die hole (321) at its top. The mounting base (1) is provided with... A lifting mechanism (6) is provided, the lifting mechanism (6) includes a connecting block (63) for lifting the lower mold (32) to the mold outlet. An auxiliary support frame (7) is also provided on the mounting base (1). A limiting plate (71) is provided above the auxiliary support frame (7) and located above the turntable (21). The limiting plate (71) is provided with a limiting hole (711) corresponding to the position of the mold outlet. The top of the lower mold (32) can move through the limiting hole (711) to the lower part of the upper pressing mold for riveting. When the lifting mechanism (6) acts on one of the lower molds (32) to achieve support, the other lower molds (32) remain in their original positions, thus achieving single support of the lower mold (32).

2. The multi-station turret lower mold storage according to claim 1, characterized in that, The lifting mechanism (6) includes a connecting block (63), which has a support slot (631) located directly below the mold outlet. The support slot (631) forms a top slot and a side slot on the connecting block (63). The bottom of the lower mold (32) is fixed with a slot. The side slot of the support slot (631) is used for the lower mold (32) to be inserted, and the top slot of the support slot (631) is used for the lower mold (32) to protrude.

3. The multi-station turret lower mold storage according to claim 2, characterized in that, The lifting mechanism (6) further includes a mounting bracket (61) and a lifting driver (62). The mounting bracket (61) is mounted on the side wall of the mounting base (1). The lifting driver (62) is fixed on the mounting bracket (61). The lifting driver (62) is arranged in a vertical direction. The connecting block (63) is fixed to the piston rod of the lifting driver (62).

4. A multi-station turret lower mold storage according to claim 3, characterized in that, It also includes a top support mechanism (8), which includes a vertically arranged sliding block (82). When the connecting block (63) is raised to the highest position, the sliding block (82) is displaced to the underside of the connecting block (63) to provide reinforced support. When the connecting block (63) is lowered, the sliding block (82) is displaced to the outside of the mold opening.

5. A multi-station turret lower mold storage according to claim 4, characterized in that, The top support mechanism (8) also includes a reinforcing seat (83), which is fixed to the upper surface of the mounting bracket (61). The sliding block (82) is located above the reinforcing seat (83) and slides horizontally. During riveting, the reinforcing seat (83) abuts against the sliding block (82) to assist the sliding block (82) in supporting the connecting block (63).

6. The multi-station turret lower mold storage according to claim 1, characterized in that, The mounting base (1) is provided with a plug-in alignment mechanism (5), which includes a limiting gear (51) and a limiting block (52). The limiting gear (51) is coaxially disposed on the rotating shaft (2), and the limiting block (52) is slidably disposed on the mounting base (1). The limiting block (52) is engaged with the tooth groove of the limiting gear (51), and the shape of the limiting block (52) is adapted to the slot shape of the limiting gear (51).

7. A multi-station turret lower mold storage according to claim 6, characterized in that, The mounting base (1) is supported on the top of a circular pad (14). The surface of the circular pad (14) is provided with a mold changing hole (141). The mold changing hole (141) penetrates the upper and lower surfaces of the circular pad (14). A hole cover (142) is slidably provided in the mold changing hole (141). The hole cover (142) is used to block the mold changing hole (141).

8. A multi-station turret lower mold storage according to claim 7, characterized in that, The mold changing hole (141) has a guide block (1411) on its wall, and the hole cover (142) has a guide groove (1421) on its side wall. The guide block (1411) and the guide groove (1421) slide together.

9. A multi-station turret lower mold storage according to claim 1, characterized in that, The top of the multi-station turret lower mold storage is covered with a protective cover (114).

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