Stamping station for the car body roof

Abstract

The present invention belongs to the technical field of automobile body production and processing equipment, and provides a stamping station for an automobile body roof cover, which includes a machine tool column, a hydraulic station, a first hydraulic cylinder, a movable seat, an upper die assembly, a lower die assembly, a support seat and a support table. A pair of buffer drums are arranged on the inner wall of the machine tool column. The upper die assembly includes an upper die seat, an upper die body and a shock absorber. The lower die assembly includes a lower die seat, a second hydraulic cylinder, a lifting table and a lower die body. An auxiliary die lifting mechanism is arranged below the lifting table. At least two air blowing channels are arranged on the lifting table. The input end of the air blowing channel is provided with an air blowing pipeline, and the input end of the air blowing pipeline is provided with a pneumatic pressure station. Blind holes are arranged at the corners of the lower die seat, and a buffer positioning mechanism is arranged in the blind holes. The buffer positioning mechanism includes a cylindrical cam, a guide block, a spring and a positioning arm. This device is reasonably designed, simple in structure, good in positioning accuracy, beneficial to reducing production costs and improving the production efficiency of the workshop, and is suitable for large-scale popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile body production and processing equipment, and particularly relates to a stamping station for an automobile body roof cover. Background Art

[0002] The function of an automobile body is mainly to protect the driver and form a good aerodynamic environment. In terms of form, the automobile body structure is mainly divided into two types: non-load-bearing and load-bearing. The roof cover is the cover on the top of the carriage. The height of the roof covers of medium-sized and heavy-duty trucks is generally greater than that of cars. The production and manufacturing methods of automobile body roof covers include casting, machining, and stamping forming. Among them, although the load-bearing capacity of the stamping-formed roof cover is not the highest, since the load-bearing strength of the body roof cover is not the most important for the automobile, and stamping forming can not only improve production efficiency but also meet certain strength requirements, so many workshops use stamping stations to stamp and produce roof cover blanks.

[0003] At present, the stamping stations used in stamping forming are mainly powered by hydraulic pressure. The hydraulic power drives the upper and lower dies to generate relative movement to stamp the blank. However, the existing problems of the existing stamping stations are that after the blank is sent to the stamping station by the manipulator, the positioning effect at the stamping station is poor, and raw material deviation will occur during the mold closing instant, resulting in unqualified stamping products and increasing production costs; moreover, after the upper and lower dies are separated, the product is completely taken away by relying on the multi-directional movement of the manipulator, which requires a large activity space to be reserved for the manipulator, and the probability of the manipulator making mistakes will also increase, thereby affecting the actual production efficiency of the workshop. Summary of the Invention

[0004] In view of the above technical problems existing in the stamping station, the present invention provides a stamping station for an automobile body roof cover with reasonable design, good positioning accuracy, which is beneficial to reducing production costs and improving the production efficiency of the workshop.

[0005] To achieve the above object, the technical solution adopted by the present invention is that the stamping station of the automobile body roof provided by the present invention includes a pair of machine tool columns. A hydraulic station is provided at the top of the machine tool columns. A first hydraulic cylinder is provided at the power execution end of the hydraulic station. The movable end of the first hydraulic cylinder faces downward and is provided with a movable seat. A upper die assembly is provided at the bottom of the movable seat. A lower die assembly is provided below the upper die assembly. A support seat is provided at the bottom of the lower die assembly. The support seat is arranged on a support table. A pair of buffer drums are provided on the inner wall of the machine tool columns. The drum surface of the buffer drum is in frictional cooperation with the side surface of the upper die assembly. The upper die assembly includes a hollow upper die base. An upper die body is provided at the center inside the upper die base. A ring-shaped shock absorber is provided between the upper die body and the upper die base. The lower die assembly includes a hollow lower die base. Four uniformly distributed second hydraulic cylinders are provided inside the lower die base. The movable end of the second hydraulic cylinder faces upward and is provided with a connecting block. A lifting table is provided at the top of the four second hydraulic cylinders. A lower die body cooperating with the upper die body is provided at the center of the lifting table. A plurality of pairs of strip-shaped openings symmetrically distributed with respect to the lower die body are provided on the lifting table. An auxiliary mold lifting mechanism movably cooperating with the strip-shaped openings is provided below the lifting table. At least two air blowing channels are provided on the lifting table. The output end of the air blowing channel is close to the edge of the lower die body. An air blowing pipeline is provided at the input end of the air blowing channel. An air pressure station is provided at the input end of the air blowing pipeline. Blind holes are provided at the corners of the lower die base. A buffer positioning mechanism is provided in the blind holes. The buffer positioning mechanism includes a cylindrical cam. A guiding block cooperating with the cylindrical cam is provided in the blind holes. The top of the cylindrical cam faces the upper die base. A spring is sleeved outside the cylindrical cam. A positioning arm limitingly cooperating with the cylindrical cam is provided at the top end of the spring. The bottom end of the spring is connected to the side surface of the cylindrical cam.

[0006] Preferably, the auxiliary mold lifting mechanism includes a plurality of pairs of mold lifting arms. The mold lifting arm includes a top tooth part. An inclined plate part inclined downward towards the inner wall of the lower die base is provided at the end of the top tooth part. A flat plate part is provided at the bottom of the inclined plate part. The flat plate part is arranged on a support square pipe. The support square pipe is horizontally arranged inside the lower die base.

[0007] Preferably, the air blowing pipeline includes a straight pipe connected to the air blowing channel. A U-shaped opening movably cooperating with the straight pipe up and down is provided on the lower die base. A hose is provided at the end of the straight pipe away from the air blowing channel. A transition seat is provided on the conveying path of the hose. An installation opening cooperating with the transition seat is provided on the machine tool column. The input end of the hose is connected to the air pressure station.

[0008] Preferably, the positioning arm includes an O-shaped part sleeved on the cylindrical cam. A C-shaped part is arranged at the bottom of the O-shaped part. One end of the C-shaped part is connected to a spring. An arc plate part is arranged on the side surface of the C-shaped part. The arc plate part bends upward and extends, and a clamping tooth for clamping a blank is arranged at its end. The tooth end of the clamping tooth faces upward.

[0009] Preferably, the shock absorber includes a toroidal body. A wedge-shaped surface is arranged on the inner wall of the toroidal body. A plurality of wing grooves intersecting horizontally and vertically are arranged at the bottom of the toroidal body.

[0010] Preferably, a support opening penetrating through from front to back is arranged in the middle of the support table. A limiting plate is arranged on the front side of the support table. Support rollers which are movably matched with the bottom surface of the support seat are arranged on the support table. A plurality of positioning holes are arranged at the bottom of the support seat. Positioning blocks corresponding to the positioning holes are arranged on the inner wall of the support table. A positioning screw for connecting the positioning block and the positioning hole is arranged in the positioning block.

[0011] Preferably, a pair of guide sliding plates are arranged on both sides of the movable seat. The guide sliding plates are movably matched with guide grooves arranged on the machine tool column. The bottom of the guide groove is a closed end.

[0012] Preferably, a guide member with a cross-section in the shape of a cross is arranged at the bottom of the lifting table. The guide member is movably matched with a guide cross opening arranged at the center of the support seat.

[0013] Preferably, a track groove is arranged on the wheel surface of the cylindrical cam. The track groove includes a vertical groove part penetrating through the bottom surface of the cylindrical cam. A curved groove part is arranged at the top of the vertical groove part.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] 1. For the stamping station of the automobile body roof provided by the present invention, the buffer drum and the buffer positioning mechanism can enable the upper die base and the lower die base to achieve buffer cooperation. This buffer cooperation action can improve the stability and balance of the stamping action, and can also play a role in pre-pressing and positioning the blank; the buffer positioning mechanism can support the blank and automatically leave the blank with the closing of the upper die assembly and the lower die assembly to ensure the quality of the stamping product.

[0016] 2. For the stamping station of the automobile body roof provided by the present invention, the lower die assembly can descend after the stamping action is completed under the action of the second hydraulic cylinder. The stamping product can be quickly separated from the upper die body and the lower die body under the combined action of the auxiliary die lifting mechanism and the air blowing of the pneumatic station, and there is no need to arrange a manipulator with a large movement amplitude in the workshop, which is beneficial to improving production efficiency and reducing production costs.

[0017] This device is reasonably designed, simple in structure, good in positioning accuracy, conducive to reducing production costs and improving workshop production efficiency, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 An isometric view of the stamping station for the automobile body roof cover provided for the embodiment;

[0020] Figure 2 The front view of the stamping station for the automobile body roof cover provided for the embodiment;

[0021] Figure 3 The sectional view in the H-H direction of the stamping station for the automobile body roof cover provided for the embodiment;

[0022] Figure 4 An isometric view of the machine tool column, buffer drum, lower die assembly, support table and support roller provided for the embodiment;

[0023] Figure 5 The sectional view of the upper die assembly and the lower die assembly provided for the embodiment;

[0024] Figure 6 The front view of the buffer positioning mechanism (without spring) provided for the embodiment;

[0025] Figure 7 An isometric view of the internal structure of the lower die assembly provided for the embodiment;

[0026] Figure 8 The front view of the internal structure of the lower die assembly provided for the embodiment;

[0027] Figure 9 Provided for the embodiment Figure 4 The enlarged schematic diagram of the A structure in

[0028] In the above figures:

[0029] 1. Machine tool column; 2. Hydraulic station; 3. First hydraulic cylinder; 4. Movable seat;

[0030] 5. Upper die assembly; 51. Upper die seat; 52. Upper die body; 53. Shock absorber; 531. Torus; 532. Wedge surface; 533. Fin groove;

[0031] 6. Lower die assembly; 61. Lower die base; 62. Second hydraulic cylinder; 63. Lifting table; 631. Strip-shaped opening; 632. Blowing channel; 64. Lower die body; 65. Auxiliary mold lifting mechanism; 651. Mold lifting arm; 6511. Top tooth part; 6512. Inclined plate part; 6513. Flat plate part; 652. Support square pipe; 66. Buffer positioning mechanism; 661. Cylindrical cam; 662. Spring; 663. Positioning arm; 6631. O-shaped part; 6632. C-shaped part; 6633. Arc plate part; 6634. Locking tooth; 664. Track groove; 6641. Vertical groove part; 6642. Curved groove part;

[0032] 7. Support seat; 8. Support table; 9. Buffer drum; 10. Blowing pipeline; 101. Straight pipe; 102. Hose; 11. Pneumatic station; 12. Transition seat; 13. Limit plate; 14. Support roller; 15. Positioning block; 16. Positioning screw; 17. Guide part. Detailed implementation manners

[0033] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. For the convenience of description, the words "upper", "lower", "left" and "right" as used below only indicate the same directions as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

[0034] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.

[0035] Embodiment, as Figure 1 As shown in FIG. 9, the stamping station for the automobile body roof provided by the present invention includes a pair of machine tool columns 1. A hydraulic station 2 is provided at the top of the machine tool column 1. A first hydraulic cylinder 3 is provided at the power execution end of the hydraulic station 2. The movable end of the first hydraulic cylinder 3 faces downward and is provided with a movable seat 4. A lower die assembly 5 is provided at the bottom of the movable seat 4. A lower die assembly 6 is provided below the lower die assembly 5. A support seat 7 is provided at the bottom of the lower die assembly 6. The support seat 7 is arranged on a support table 8. Among them, the first hydraulic cylinder 3 drives the movable seat 4 and the lower die assembly 5 to move downward toward the lower die assembly under the hydraulic supply of the hydraulic station 2. The movable seat 4 plays a guiding role on the one hand and a balancing role on the other hand.

[0036] In order to improve the stamping quality of the device, a pair of buffer drums 9 are provided on the inner wall of the machine tool column 1 of the present invention. The drum surface of the buffer drum 9 is in frictional fit with the side surface of the upper die assembly 5. The upper die assembly 5 includes a hollow upper die base 51. The inner center of the upper die base 51 is provided with an upper die body 52. A U-shaped shock absorber 53 is provided between the upper die body 52 and the upper die base 51. The lower die assembly 6 includes a hollow lower die base 61. Four uniformly distributed second hydraulic cylinders 62 are provided inside the lower die base 61. The hydraulic source of the second hydraulic cylinders 62 can be an independent hydraulic station or can be shared with the hydraulic station 2. The movable ends of the second hydraulic cylinders 62 face upward and are provided with connection blocks. A lifting table 63 is provided at the tops of the four second hydraulic cylinders 62. The center of the lifting table 63 is provided with a lower die body 64 that cooperates with the upper die body 52. Multiple pairs of strip-shaped openings 631 symmetrically distributed with respect to the lower die body 64 are provided on the lifting table 63. An auxiliary die-lifting mechanism 65 that is movably engaged with the strip-shaped openings 631 is provided below the lifting table 63. At least two air blowing channels 632 are provided on the lifting table 63. The output ends of the air blowing channels 632 are close to the edge of the lower die body 64. The input ends of the air blowing channels 632 are provided with air blowing pipelines 10. The input ends of the air blowing pipelines 10 are provided with a pneumatic station 11. Blind holes are provided at the corners of the lower die base 61. A buffer positioning mechanism 66 is provided in the blind holes. The buffer positioning mechanism 66 includes a cylindrical cam 661. A guiding block that cooperates with the cylindrical cam 661 is provided in the blind hole. The top of the cylindrical cam 661 faces the upper die base 51. A spring 662 is sleeved outside the cylindrical cam 661. The top end of the spring 662 is provided with a positioning arm 663 that is in limiting fit with the cylindrical cam 661. The bottom end of the spring 662 is connected to the side surface of the cylindrical cam.

[0037] In the present invention, during the process of the buffer drum 9 frictional contact with the moving upper die base 51, it can play a role in balancing and damping the upper die assembly 5, and the shock absorber 53 inside the upper die base 51 can also reduce the vibration received by the upper die base 51. Both the upper die assembly 5 and the lower die assembly 6 adopt an inner and outer nested structure. The advantage of such a design is that before the upper die body 52 contacts the blank on the upper die body 52, the upper die base 51 pre-contacts the blank to play a role in pre-pressing and positioning the blank. The upward pressure received by the cylindrical cam 661 of the buffer positioning mechanism 66 and the elastic force of the spring 662 are reaction forces. The spring 662 enables the upper die base 51 and the lower die base 61 to achieve buffer cooperation at the stamping limit position, and this buffer cooperation action can improve the stability and balance of the stamping action. At the same time, during the process of the cylindrical cam 661 descending, it can automatically rotate under the cooperation with the guiding block, causing the positioning arm 663 to rotate and leave the die-closing position of the upper and lower die assemblies 6, and it is gradually separated from the blank, which is beneficial to improving the stability of the blank during the stamping process, thereby ensuring the production quality of the product.

[0038] Furthermore, the lower die assembly 6 provided by the present invention can be lifted and lowered under the action of the second hydraulic cylinder 62. In particular, after the stamping operation is completed, it descends to create a separation tendency from the stamping product. The stamping product can be quickly separated from the upper die body 52 and the lower die body 64 under the combined action of the auxiliary die-lifting mechanism 65 and the air blowing of the pneumatic station 11. For example, the air supplied by the pneumatic station 11 to the air blowing channel 632 quickly distributes along the mating surfaces of the upper die body 52, the stamping product, and the lower die body 64, so that the pressure between the upper die body 52, the stamping product, and the lower die body 64 is quickly relieved and dissipated. The position of the stamping product before being transferred is basically the same as its position at the moment when stamping is completed, that is, in an overhead state. There is no need to arrange a manipulator with a large movement range in the workshop, and a manipulator with a small movement range can be directly used to pick it up, which is beneficial to improving production efficiency and reducing production costs.

[0039] To improve the cooperation performance between the auxiliary die-lifting mechanism 65 and the lifting and lowering actions of the upper die body 52, the auxiliary die-lifting mechanism 65 provided by the present invention includes multiple pairs of die-lifting arms 651. The die-lifting arm 651 includes a top tooth portion 6511. An inclined plate portion 6512 inclined downward toward the inner wall of the lower die base 61 is provided at the end of the top tooth portion 6511. A flat plate portion 6513 is provided at the bottom of the inclined plate portion 6512. The flat plate portion 6513 is arranged on a support square tube 652. The support square tube 652 is horizontally arranged inside the lower die base 61. Among them, the tooth surface of the top tooth portion 6511 can be designed as a wedge-shaped surface or a plane with a certain horizontal length. The support square tube 652 serves to raise the die-lifting arm. In particular, it can always remain in the strip-shaped opening 631 during the descent of the lower die body 64 until the top tooth portion 6511 abuts against the bottom edge of the stamping product to completely lift the stamping product overhead.

[0040] Considering that the air blowing channel 632 needs to perform lifting and lowering actions along with the lifting platform 63, in order to improve the working safety of the air blowing pipeline 10, the air blowing pipeline 10 provided by the present invention includes a straight pipe 101 connected to the air blowing channel 632. At the same time, a U-shaped opening that is in up-and-down movable cooperation with the straight pipe is provided on the lower die base 61. The U-shaped opening can enable the straight pipe 101 to safely lift and lower along with the lifting platform 63 and always ensure its connection quality with the pneumatic station 11. Further, a flexible pipe 102 is provided at one end of the straight pipe away from the air blowing channel 632. A transition seat 12 is provided on the conveying path of the flexible pipe 102. An installation opening that cooperates with the transition seat 12 is provided on the machine tool column 1. The input end of the flexible pipe 102 is connected to the pneumatic station 11. The length of the flexible pipe can be selected according to actual connection needs, and the transition connection function of the transition seat 12 can enable the flexible pipe not to bypass the machine tool column 1 for separate connection, which is beneficial to ensuring the connection reliability of the air blowing pipeline 10.

[0041] To improve the automatic rotation performance of the positioning arm 663, the positioning arm 663 provided by the present invention includes an O-shaped part 6631 sleeved with a cylindrical cam 661. A C-shaped part 6632 is provided at the bottom of the O-shaped part 6631. One end of the C-shaped part 6632 is connected to a spring 662. An arc plate part 6633 is provided on the side surface of the C-shaped part 6632. The arc plate part 6633 bends upward and extends, and a clamping tooth 6634 for clamping the blank is provided at its end, and the tooth end of the clamping tooth 6634 faces upward. At the same time, a track groove 664 is provided on the wheel surface of the cylindrical cam 661 provided by the present invention. The track groove 664 includes a vertical groove part 6641 penetrating through the bottom surface of the cylindrical cam 661, and a curved groove part 6642 is provided at the top of the vertical groove part 6641. Among them, the port of the C-shaped part 6632 can be better connected with the top end of the spring 662, and at the same time, it is also beneficial to the transmission of the acting force of the spring 662; the connection part between the arc plate part 6633 and the clamping tooth 6634 part is the limit node of the largest area of the blank; during the mold closing process of the upper mold assembly 5 and the lower mold assembly 6, the arc plate part 6633 will generate corresponding deformation, and the real-time diameter of the blank will steadily shrink along the plate surface of the arc plate part 6633 until stamping forming; if the vertical groove part 6641 cooperates with the guide block, the cylindrical cam 661 can move straight up or down. If the cylindrical cam 661 continues to descend, the curved groove part 6642 will cooperate with the guide block, so that the cylindrical cam 661 will rotate correspondingly together with the spring 662, and at the same time, the spring 662 will also drive the positioning arm 663 to rotate until the clamping tooth 6634 part disengages from the blank and leaves the mold closing range of the upper mold assembly 5 and the lower mold assembly 6.

[0042] To improve the shock absorption performance of the shock absorber 53 in the upper mold assembly 5, the shock absorber 53 provided by the present invention includes a toroidal body 531. A wedge-shaped surface 532 is provided on the inner wall of the toroidal body 531. A plurality of horizontally and vertically staggered fin grooves 533 are provided at the bottom of the toroidal body 531. The bottom end of the fin formed by adjacent fin grooves 533 is a free end, and after receiving the vibration from the toroidal body 531, it can consume potential energy through its own vibration. The wedge-shaped surface design of the toroidal body 531 can improve its matching with the upper mold body 52, and the entire shock absorber 53 can be installed in the upper mold base 51 in a movable nested manner, and rely on its own weight to keep the three in the same action aspect with the upper mold base 51 and the upper mold body 52.

[0043] To improve the safety of die changing, the lower die assembly 6 provided by the present invention can be dislocation passively with the support table 8. Specifically, a support opening penetrating through the front and back is provided in the middle of the support table 8, a limiting plate 13 is provided on the front side of the support table 8, support rollers 14 movably matched with the bottom surface of the support seat 7 are provided on the support table 8, a plurality of positioning holes are provided at the bottom of the support seat 7, positioning blocks 15 corresponding to the positioning holes are provided on the inner wall of the support table 8, and positioning screws 16 connecting the positioning blocks 15 and the positioning holes are provided in the positioning blocks 15. In this way, by releasing the connection between the positioning screws 16 and the positioning holes of the positioning blocks 15, the upper die assembly 5 and the support seat 7 can be translated manually or by other devices, so that their positions are staggered from the upper die assembly 5, and thus the safety of die changing for the upper die assembly 5 and the lower die assembly is ensured.

[0044] Further, a pair of guiding sliding plates are provided on both sides of the movable seat 4, and the guiding sliding plates are movably matched with guiding grooves provided on the machine tool column 1, and the bottom of the guiding grooves is a closed end. The movable seat 4 and the machine tool column 1 are movably matched through the guiding sliding plates and the guiding grooves, which can improve the stability of the movable seat 4 when driven by the first hydraulic cylinder 3 to perform actions; at the same time, the bottom-sealing design of the guiding grooves can also ensure the safety of the die closing action and the die changing operation.

[0045] To improve the lifting stability of the lifting table 63 driven by the second hydraulic cylinder 62, a guiding member 17 with a cross-shaped cross section is provided at the bottom of the lifting table 63, and the guiding member 17 is movably matched with a guiding cross opening provided at the center of the support seat 7, and the cooperation between the guiding member 17 and the guiding cross opening is used to provide vertical guiding conditions for the lifting table 63, thereby ensuring the lifting stability of the lifting table 63.

[0046] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A stamping station for an automobile body roof, comprising a pair of machine tool columns, a hydraulic station is arranged at the top of the machine tool columns, a first hydraulic cylinder is arranged at the power execution end of the hydraulic station, the movable end of the first hydraulic cylinder faces downward and is provided with a movable seat, a upper die assembly is arranged at the bottom of the movable seat, a lower die assembly is arranged below the upper die assembly, a support seat is arranged at the bottom of the lower die assembly, and the support seat is arranged on a support table, characterized in that, A pair of buffer drums are arranged on the inner wall of the machine tool column. The drum surfaces of the buffer drums are in frictional fit with the side surfaces of the upper die assembly. The upper die assembly includes a hollow upper die base. An upper die body is arranged at the center inside the upper die base. A ring-shaped shock absorber is arranged between the upper die body and the upper die base. The lower die assembly includes a hollow lower die base. Four uniformly distributed second hydraulic cylinders are arranged inside the lower die base. The movable ends of the second hydraulic cylinders face upward and are provided with connecting blocks. A lifting table is arranged at the tops of the four second hydraulic cylinders. A lower die body that cooperates with the upper die body is arranged at the center of the lifting table. A plurality of pairs of strip-shaped openings symmetrically distributed with respect to the lower die body are arranged on the lifting table. An auxiliary mold lifting mechanism that is movably matched with the strip-shaped openings is arranged below the lifting table. At least two air blowing channels are arranged on the lifting table. The output ends of the air blowing channels are close to the edge of the lower die body. The input ends of the air blowing channels are provided with air blowing pipelines. The input end of the air blowing pipeline is provided with a pneumatic station. Blind holes are arranged at the corners of the lower die base. A buffer positioning mechanism is arranged in the blind holes. The buffer positioning mechanism includes a cylindrical cam. A guide block that cooperates with the cylindrical cam is arranged in the blind hole. The top of the cylindrical cam faces the upper die base. A spring is sleeved outside the cylindrical cam. The top end of the spring is provided with a positioning arm that is in limit fit with the cylindrical cam. The bottom end of the spring is connected to the side surface of the cylindrical cam.

2. The stamping station for the automobile body roof cover according to claim 1, characterized in that, The auxiliary mold lifting mechanism includes a plurality of pairs of mold lifting arms. The mold lifting arm includes a top tooth part. An inclined plate part that inclines downward toward the inner wall of the lower die base is arranged at the end of the top tooth part. A flat plate part is arranged at the bottom of the inclined plate part. The flat plate part is arranged on a support square pipe. The support square pipe is horizontally arranged inside the lower die base.

3. The stamping station for the automobile body roof according to claim 2, characterized in that, The air blowing pipeline includes a straight pipe connected to the air blowing channel. A U-shaped opening that is in up-and-down movable fit with the straight pipe is arranged on the lower die base. A flexible pipe is arranged at the end of the straight pipe away from the air blowing channel. A transition seat is arranged on the conveying path of the flexible pipe. An installation opening that cooperates with the transition seat is arranged on the machine tool column. The input end of the flexible pipe is connected to the pneumatic station.

4. The stamping station for the car body roof according to claim 3, characterized in that, The positioning arm includes an O-shaped part sleeved with the cylindrical cam. A C-shaped part is arranged at the bottom of the O-shaped part. One end of the C-shaped part is connected to the spring. An arc plate part is arranged on the side surface of the C-shaped part. The arc plate part bends upward and extends, and a clamping tooth for clamping the blank is arranged at the end of the arc plate part. The tooth end of the clamping tooth faces upward.

5. The stamping station for the car body roof according to claim 1, characterized in that, The shock absorber includes a ring-shaped body. A wedge-shaped surface is arranged on the inner wall of the ring-shaped body. A plurality of horizontally and vertically crisscrossed fin grooves are arranged at the bottom of the ring-shaped body.

6. The stamping station for the car body roof according to claim 1, characterized in that A support opening that penetrates through the front and back is arranged in the middle of the support table. A limiting plate is arranged on the front side of the support table. Support rollers that are in movable fit with the bottom surface of the support seat are arranged on the support table. A plurality of positioning holes are arranged at the bottom of the support seat. Positioning blocks corresponding to the positioning holes are arranged on the inner wall of the support table. Positioning screws connecting the positioning blocks and the positioning holes are arranged in the positioning blocks.

7. The stamping station for the car body roof according to claim 1, characterized in that, A pair of guide sliding plates are arranged on both sides of the movable seat. The guide sliding plates are in movable fit with guide grooves arranged on the machine tool column. The bottom of the guide groove is a closed end.

8. The stamping station for the automobile body roof cover according to claim 1, characterized in that, A guide member with a cross-shaped cross-section is provided at the bottom of the lifting table, and the guide member is movably engaged with a guide cross opening provided at the center of the support base.

9. The stamping station for the automobile body roof according to claim 1, characterized in that, A track groove is provided on the wheel surface of the cylindrical cam. The track groove includes a vertical groove portion that communicates with the bottom surface of the cylindrical cam, and a curved groove portion is provided at the top of the vertical groove portion.

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