A volute spring press forming device

Abstract

The present application relates to spring stamping manufacturing technical field, specifically to a volute spring stamping forming device, comprising a winding stamping module, which comprises: a winding forming slider moving linearly along the extension direction of the plate body to be stamped, the winding forming slider facing the front end of the plate body; a forming punch, which is arranged on the winding forming slider; an auxiliary forming slider, which comprises a pair of forming limiting heads located at the front end of the forming punch, and a discharging gap is arranged between the forming limiting head and the forming punch; a gap adjusting mechanism, which is in transmission connection with the forming punch; during the stamping process, the winding forming slider drives the forming punch to move along the extension direction of the plate body, the forming punch is used for bending the plate body exposed outside the pair of forming limiting heads, the auxiliary forming slider is used for driving the forming limiting head to move with the forming punch, in this process, the plate body is continuously bent and wound to form a spring body, and the gap adjusting mechanism is used for adjusting the width of the discharging gap to adjust the gap between the winding layers of the spring body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spring stamping manufacturing, in particular to a volute spring stamping forming device. BACKGROUND

[0002] As a mechanical element that stores and releases energy by using material elastic deformation, the volute spring is widely used in the tensioning, resetting and energy storage mechanism of automobiles, instruments, household appliances and many other fields. Its core component is a spiral spring body wound by a special material strip. The traditional volute spring manufacturing process is to preliminarily wind the spring sheet (plate body) on a special winding device. This process has the defect of being unable to process profiled springs,

[0003] In order to realize the automatic production of profiled volute springs, stamping forming technology is introduced into the manufacturing of volute springs. Some existing stamping forming devices try to directly wind the straight spring sheet into the final spring body shape in one or several continuous stamping strokes through the cooperation of the punch and the die. However, such devices face a key technical bottleneck in actual application: it is difficult to accurately control the gap (i.e. pitch) between adjacent winding layers of the formed spring body during continuous stamping winding.

[0004] In the dynamic winding process, the gap control of the spring body is crucial, as it directly determines the key performance parameters of the spring, such as stiffness, working stroke and fatigue life. If the gap control is not proper, it will lead to unstable spring force characteristics, interlayer interference or jamming during movement, etc. The traditional fixed gap stamping die cannot change the discharge gap after processing, and can only produce single specification, fixed gap spring bodies, lacking flexibility in production. If springs with different gap parameters are to be produced, the entire die must be replaced or complex mechanical adjustments must be made, which not only increases production costs, but also seriously affects production efficiency and changeover speed.

[0005] Therefore, developing a mechanism that can dynamically and accurately adjust and control the winding gap of the spring body during stamping forming has become a key to improving the stamping forming technology level and equipment adaptability of volute springs. SUMMARY

[0006] To overcome the shortcomings of the prior art, the present application provides a volute spring stamping forming device that uses stamping process to realize the forming and manufacturing of volute springs and can control the gap change between the winding layers of the spring body to adapt to the design parameters.

[0007] To achieve the above purpose, the present application is realized by the following technical solutions:

[0008] The application discloses a volute spring stamping forming device for stamping a spring piece into a volute spring, wherein the spring piece before stamping comprises a linearly extended plate body, and the volute spring after stamping comprises a spring body formed by winding the plate body, and the volute spring stamping forming device comprises a winding stamping module, which comprises:

[0009] a winding forming sliding block which linearly moves along the extension direction of the plate body to be stamped, and the winding forming sliding block is opposite to the front end of the plate body;

[0010] a forming punch which is arranged on the winding forming sliding block;

[0011] an auxiliary forming sliding block which comprises a pair of forming limiting heads arranged at the front end of the forming punch, the plate body to be stamped is located between the pair of forming limiting heads in the thickness direction, the spring piece is exposed outside the pair of forming limiting heads at one end close to the winding forming sliding block, and a discharging gap is arranged between the forming limiting head and the forming punch;

[0012] a gap adjusting mechanism which is in transmission connection with the forming punch;

[0013] During the stamping process, the winding forming sliding block drives the forming punch to move along the extension direction of the plate body, after the forming punch contacts the plate body, the forming punch is used for stamping and bending the plate body exposed outside the pair of forming limiting heads, the auxiliary forming sliding block is used for driving the forming limiting head to move along with the forming punch, in this process, the plate body is continuously stamped and bent to form the spring body, and the gap adjusting mechanism is used for adjusting the width of the discharging gap to adjust the gap between the winding layers of the spring body.

[0014] Further, the gap adjusting mechanism of the volute spring stamping forming device comprises a guide block and a transmission frame, the transmission frame is rotationally installed on the winding forming sliding block, the forming punch is installed on the transmission frame, the transmission frame is provided with a sliding connection part, and the guide block is provided with a sliding groove matched with the sliding connection part. As a preferred scheme of the application, based on the above structure, during the process that the winding forming sliding block drives the forming punch to move, the transmission frame is rotated due to the cooperation and guidance of the sliding groove and the sliding connection part, so that the forming punch swings by a preset amplitude, the relative position between the forming punch and the forming limiting head is adjusted, and dynamic adjustment of the discharging gap is realized. The dynamic adjustment mechanism can change the discharging gap in real time according to the stamping stroke, so as to link and control the gap between the layers in the winding process of the spring body, thereby ensuring that the product meets the design requirements and improving the forming precision and stability.

[0015] Further, the volute spring stamping forming device in the application, the sliding channel is a gap adjusting guide surface arranged on one side of the guide block near the transmission frame, the sliding connection part abuts on the gap adjusting guide surface, and the transmission frame is connected with an elastic member for applying an elastic force to the transmission frame to keep the sliding connection part always abutting on the gap adjusting guide surface. As a preferred scheme of the application, based on the above structure, the pre-tightening force of the elastic member ensures that the sliding connection part and the gap adjusting guide surface always keep stable contact, avoids contact failure caused by vibration or speed change, and thus guarantees the continuity and accuracy of the swinging action.

[0016] Further, the volute spring stamping forming device in the application, the sliding connection part is a guide roller rotatably installed on the transmission frame, the guide block is located above the guide roller, and the gap adjusting guide surface gradually inclines upward in the direction in which the winding forming slider moves toward the auxiliary forming slider. As a preferred scheme of the application, the gradual change control of the gap between the winding layers of the spring body and the density of the inner layer and the sparseness of the outer layer can be realized.

[0017] Further, the volute spring stamping forming device in the application, the guide block is located above the guide roller, the forming punch is a stamping roller rotatably installed on the transmission frame, and the axis height of the stamping roller is always located on the upper side of the plate body. As a preferred scheme of the application, the front end of the plate body can be stably wound on the lower side of the plate body during the stamping process.

[0018] Further, the volute spring stamping forming device in the application, the front end of the winding forming slider is provided with a driving surface abutting and cooperating with the auxiliary forming slider, the winding stamping module further comprises a first linear driving device and a driving cylinder, the first linear driving device is in transmission connection with the winding forming slider, and the driving cylinder is in transmission connection with the auxiliary forming slider; in the reset state, the driving cylinder is used for applying a preset pressure to the auxiliary forming slider to keep the auxiliary forming slider protruding toward one end of the winding forming slider; during the stamping process, the driving force of the first linear driving device is greater than the preset pressure, so as to push the auxiliary forming slider to move synchronously with the winding forming slider through the abutment of the driving surface and the auxiliary forming slider. In this process, the driving cylinder functions as a spring to ensure stable contact between the winding forming slider and the auxiliary forming slider. As a preferred scheme of the application, based on the above structure, the reliability of synchronous movement of the auxiliary forming slider and the winding forming slider can be ensured, and the control is simple. When the stamping is completed, the first linear driving device and the driving cylinder need to be reset in sequence, the first linear driving device is reset, the spring body is then moved out of a pair of forming limiting heads, and then the driving cylinder is controlled to be reset, so as to avoid interference between the auxiliary forming slider and the spring body in the synchronous reset process.

[0019] Further, the volute spring stamping forming device in the application, the elastic sheet is arranged on one side of the conveying belt in the width direction, the elastic sheet is arranged in the extension direction of the conveying belt, the conveying belt penetrates between a pair of forming limiting heads, and the conveying belt is moved in the extension direction of the conveying belt to realize that each elastic sheet enters between the pair of forming limiting heads in turn to be stamped; the guide block is provided with an avoiding limiting groove, the avoiding limiting groove is arranged at an end of the gap adjusting guide surface away from the auxiliary forming slider, and when the winding forming slider is in a reset state, the guide roller is located in the avoiding limiting groove. As the preferred scheme of the application, the forming punch needs to move backward when the winding forming slider is reset to leave the feeding space of the elastic sheet moving along the conveying belt, and the traditional method is to directly pull the winding forming slider backward to leave the space, which can cause the reset stroke of the winding forming slider to be too long, so that the compactness of the device is poor. By arranging the avoiding limiting groove, the guide roller and the avoiding limiting groove are matched, so that when the winding forming slider is reset, the forming punch swings backward with the transmission frame to leave the feeding space of the elastic sheet, so that the moving stroke of the winding forming slider is shortened, and the compactness and the action reliability of the structure are effectively improved.

[0020] Further, the volute spring stamping forming device in the application, the volute spring stamping forming device further comprises a seat body, the winding stamping module is arranged on the seat body, the seat body is provided with a moving groove for accommodating the movement of the conveying belt, the winding forming slider and the auxiliary forming slider are slidably arranged on the seat body, and the guide block is mounted on the seat body.

[0021] Further, the volute spring stamping forming device in the application, the elastic sheet includes a connecting plate at the tail end of the plate body, and further includes a tail end stamping module for stamping the connecting plate to form a connecting seat, and a package cavity is arranged in the connecting seat. The tail end stamping module is located at the rear end station of the winding stamping module. The tail end stamping module includes a pair of upper and lower pre-bending punches, the pair of pre-bending punches can be moved upward and downward to be combined on both sides of the connecting plate, so as to pre-bend part of the connecting plate into a U-shaped structure corresponding to the shape of the package cavity. An inner core rod is located at the rear end of the pre-bending punch, and an outer forming upper punch and an outer forming lower punch are located above and below the inner core rod. The outer forming upper punch and the outer forming lower punch can be moved upward and downward to stamp the connecting plate into the connecting seat. In this process, the inner core rod is arranged in the package cavity to support the inner wall of the package cavity, so as to ensure the shape quality of the package cavity. An inner core moving seat is slidably arranged in the seat body, the sliding direction of the inner core moving seat is parallel to the extension direction of the inner core rod, and the sliding direction of the inner core moving seat is inclined to the conveying direction of the conveying belt. The inner core rod is installed on the inner core moving seat, and a transmission connecting rod is rotatably connected to the inner core moving seat. The first linear driving device includes a linearly moving driving plate, and the winding forming slider is installed on the driving plate. A driving slider is arranged on the driving plate, a transmission groove is arranged on the driving slider, and a guide column is arranged on the end of the transmission connecting rod away from the inner core moving seat. As a preferred scheme of the application, based on the above structure, when the driving plate drives the winding forming slider to move to stamp the elastic sheet of the winding stamping module arranged on the winding layer, simultaneously, the driving plate drives the driving slider to move to control the position of the inner core rod. Compared with the two driving devices respectively controlling the movement of the inner core rod and the winding forming slider, each station can realize stable synchronous work, so as to improve the work efficiency and reduce the hardware cost. Specifically, the driving slider drives the inner core rod to move back and forth through the transmission groove, the guide column, the transmission connecting rod and the inner core moving seat in sequence. In the forming process of the connecting seat, the inner core rod moves to the position of penetrating into the package cavity. After the stamping forming of the connecting seat is completed, the inner core rod is reset to the outside of the package cavity with the inner core moving seat, so as to prevent interference of the conveying belt in the conveying process.

[0022] Further, the volute spring stamping forming device in the application, the tail end stamping module comprises a lower moving block, an outer forming lower punch is installed on the lower moving block, the outer forming lower punch comprises a floating punch and a limiting punch adjacent to one side of the floating punch, the floating punch is floatingly installed on the lower moving block, the lower moving block is provided with an elastic element corresponding to the bottom of the floating punch, the floating punch is opposite to the lower side of the U-shaped structure, the limiting punch is provided with a lower limiting arc groove, and the outer forming upper punch is provided with an upper limiting arc groove corresponding to the lower limiting arc groove; when the outer forming upper punch and the outer forming lower punch are opened and reset, the floating punch protrudes upward from the lower limiting arc groove; in the process that the outer forming upper punch and the outer forming lower punch move to be combined, the floating punch first contacts and pushes the U-shaped structure to bend, in the process of bending, the outer side of the U-shaped structure is sequentially guided and slid by the lower limiting arc groove and the upper limiting arc groove to turn around the inner core rod, and finally a connecting seat is formed, and in the process, the limiting elastic element of the inner core rod is compressed. Based on the above device, the precise control of the bending forming of the connecting seat can be realized.

[0023] The above technical scheme can see that the application has the following beneficial effects:

[0024] The principle of the volute spring stamping forming device is as follows: when the winding forming sliding block moves forward, the forming punch is synchronously pushed, the front end of the contact plate body is pressed to deform, the forming limiting head of the forming sliding block restricts the deformation position of the elastic sheet, and the winding track is ensured to be stable. With the continuous forward movement of the winding forming sliding block, the gap adjusting mechanism dynamically adjusts the width of the discharging gap according to the preset parameters, controls the gap change between the spring body winding layers to adapt to the design parameters. In the whole process, the plate body is gradually spiral wound under the cooperation of the forming punch and the forming limiting head, and finally the required spring body is formed, which has the advantages of compact structure and high automation degree. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the volute spring stamping forming device in the embodiment of the application;

[0026] Figure 2 It is a structure schematic view of the volute spring stamping forming device in the embodiment of the application; Figure 1

[0027] Figure 3 It is a schematic view of the stamping deformation sequence of the elastic sheet through the winding stamping module and the tail end stamping module;

[0028] Figure 4 It is a plane top view of the structure in the embodiment of the application; Figure 1

[0029] Figure 5 It is a sectional view corresponding to the A-A direction in the embodiment of the application; Figure 4

[0030] ​​​Figure 6 Fig. 2 is a sectional view corresponding to the B-B direction in Fig. 1; Figure 4 Fig. 3 is a sectional view corresponding to the B-B direction in Fig. 1;

[0031] Figure 7 Fig. 4 is a schematic diagram of the working principle of the winding and stamping module in the embodiment of the present application Figure 1 Fig. 5 is a schematic diagram of the position relationship between the inner core rod and the elastic piece when the driving plate is in the reset state;

[0032] Figure 8 Fig. 6 is a schematic diagram of the working principle of the winding and stamping module in the embodiment of the present application Figure 2 Fig. 7 is a schematic diagram of the position relationship between the inner core rod and the elastic piece when the driving plate moves to the front end;

[0033] Figure 9 Fig. 8 is a schematic diagram of the working principle of the winding and stamping module in the embodiment of the present application Figure 3 Fig. 9 is a schematic diagram of the position relationship between the inner core rod and the elastic piece when the driving plate moves to the front end;

[0034] Figure 10 Fig. 10 is a partial enlarged view of the area C in Fig. 1; Figure 9 Fig. 11 is a partial enlarged view of the area D in Fig. 1;

[0035] Figure 11 Fig. 12 is a schematic diagram of the stamping principle of the tail end stamping module in the embodiment of the present application;

[0036] Figure 12 Fig. 13 is a partial enlarged view of the area C in Fig. 1; Figure 11 Fig. 14 is a partial enlarged view of the area D in Fig. 1;

[0037] Figure 13 Fig. 15 is a schematic diagram of the position relationship between the inner core rod and the elastic piece when the driving plate is in the reset state;

[0038] Figure 14 Fig. 16 is a schematic diagram of the position relationship between the inner core rod and the elastic piece when the driving plate moves to the front end.

[0039] In the drawings:

[0040] 2-winding and stamping module; 21-winding forming slider; 211-driving surface; 22-forming punch; 220-discharge gap; 23-assisted forming slider; 231-forming limiting head; 241-guide block; 242-transmission frame; 2421-guide roller; 244-gap adjusting guide surface; 245-avoiding limiting groove; 25-first linear driving device; 251-driving plate; 252-driving slider; 2520-transmission groove; 26-driving cylinder;

[0041] 3-tail end stamping module; 31-pre-bending punch; 32-outer forming upper punch; 320-upper limiting arc groove; 321-supporting part; 33-outer forming lower punch; 331-floating punch; 332-limiting punch; 3320-lower limiting arc groove; 34-inner core rod; 341-inner core moving seat; 35-transmission connecting rod; 350-pivot; 351-guide column; 36-lower moving block; 361-elastic piece;

[0042] 4- seat; 41- moving groove;

[0043] 8- conveying belt;

[0044] 900- plate body; 901- spring body; 902- connecting plate; 9021- U-shaped structure; 903- connecting seat; 9030- cavity. DETAILED DESCRIPTION

[0045] A volute spring stamping forming device for stamping a spring piece into a coil spring, the spring piece before stamping is as shown in Figure 3 , comprising a linearly extending plate body 900, the coil spring after stamping comprises a spring body 901 formed by winding the plate body 900, comprising a winding stamping module 2, as shown in Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , which comprises:

[0046] a winding forming slide 21 which moves linearly along the extension direction of the plate body 900 to be stamped, the winding forming slide 21 is opposite to the front end of the plate body 900;

[0047] a forming punch 22 provided on the winding forming slide 21;

[0048] an auxiliary forming slide 23 comprising a pair of forming limiting heads 231 located at the front end of the forming punch 22, the plate body 900 to be stamped is located between the pair of forming limiting heads 231 in the thickness direction, the end of the spring piece close to the winding forming slide 21 is exposed outside the pair of forming limiting heads 231, and a discharging gap 220 is provided between the forming limiting heads 231 and the forming punch 22;

[0049] a gap adjusting mechanism in transmission connection with the forming punch 22;

[0050] In the stamping process, in combination with Figures 7 to 9 , the winding forming slide 21 drives the forming punch 22 to move along the extension direction of the plate body 900, after the forming punch 22 contacts the plate body 900, the forming punch 22 is used to punch and bend the plate body 900 exposed outside the pair of forming limiting heads 231, the auxiliary forming slide 23 is used to drive the forming limiting heads 231 to move with the forming punch 22, in this process, the plate body 900 is continuously punched and wound to form the spring body 901, and the gap adjusting mechanism is used to adjust the width of the discharging gap 220 to adjust the gap between the winding layers of the spring body 901.

[0051] Based on the above structure, a volute spring stamping forming device, its principle is: when the winding forming slider 21 moves forward, it drives the forming punch 22 to move forward synchronously, the front end of the contact plate body 900 applies pressure to make it deform, the forming limiting head 231 of the auxiliary forming slider 23 restricts the deformation position of the elastic sheet, and ensures the stability of the winding track. With the continuous forward movement of the winding forming slider 21, the gap adjusting mechanism dynamically adjusts the width of the discharging gap 220 according to the preset parameters, controls the change of the gap between the spring body 901 winding layers to adapt to the design parameters. During the whole process, the plate body 900 is gradually spiral wound under the cooperation of the forming punch 22 and the forming limiting head 231, and finally the required spring body 901 is formed, which has the advantages of compact structure and high automation degree.

[0052] Further, in combination with Figure 5 、 Figure 7 and Figure 9 shown, a volute spring stamping forming device in the embodiment, the gap adjusting mechanism includes guide block 241 and transmission frame 242, the transmission frame 242 is rotatably installed on the winding forming slider 21, the forming punch 22 is installed on the transmission frame 242, the transmission frame 242 is provided with a sliding connection part, and the guide block 241 is provided with a sliding groove matched with the sliding connection part. Based on the above structure, in the process of moving the forming punch 22 by the winding forming slider 21, the transmission frame 242 rotates due to the cooperation and guidance of the sliding groove and the sliding connection part, so that the forming punch 22 swings by a preset amplitude, thereby adjusting the relative position between the forming punch 22 and the forming limiting head 231, and further realizing the dynamic adjustment of the discharging gap 220. This dynamic adjustment mechanism makes the discharging gap 220 change in real time according to the stamping stroke, so as to link control the gap between each layer in the spring body winding process, thereby ensuring that the product meets the design requirements and improving the forming precision and stability.

[0053] Further, in the volute spring stamping forming device in the embodiment, the sliding groove is a gap adjusting guide surface 244 provided on the guide block 241 near one side of the transmission frame 242, the sliding connection part abuts on the gap adjusting guide surface 244, and the transmission frame 242 is connected with an elastic member (not shown) for applying an elastic force to the transmission frame 242 to keep the sliding connection part always abutting on the gap adjusting guide surface 244. Based on the above structure, the pre-tightening force of the elastic member ensures that the sliding connection part and the gap adjusting guide surface 244 always maintain stable contact, avoids contact failure caused by vibration or speed change, and thus guarantees the continuity and accuracy of the swinging action. Specifically, in an embodiment, the elastic member is a torsion spring (not shown), and a pair of pins of the torsion spring are connected with the winding forming slider 21 and the transmission frame 242 respectively, so as to apply a torsion force to the transmission frame 242 to press the sliding connection part to the gap adjusting guide surface 244.

[0054] Further, the volute spring stamping forming device in the embodiment, the sliding connection part is a guide roller 2421 rotatably installed on the transmission frame 242, the guide block 241 is located above the guide roller 2421, and the gap adjusting guide surface 244 gradually inclines upward in the direction in which the winding forming sliding block 21 moves towards the auxiliary forming sliding block 23. The gap between the winding layers of the spring body 901 can be gradually controlled.

[0055] Further, the volute spring stamping forming device in the embodiment, the forming punch 22 is a stamping roller rotatably installed on the transmission frame 242, and the axis of the stamping roller is always located at the upper side of the plate body 900. The front end of the plate body 900 can be stably wound on the lower side of the plate body 900 during the stamping process. In addition, in order to prevent the bending direction of the plate body 900 from deviating, the spring piece includes a bending head located at the front end of the plate body 900 (i.e. near the end of the forming punch 22), and the bending direction of the bending head towards the plate body 900 is consistent with the winding direction of the spring body 901.

[0056] Further, the volute spring stamping forming device in the embodiment, the front end of the winding forming sliding block 21 is provided with a driving surface 211 abutting against the auxiliary forming sliding block 23, the winding stamping module 2 further includes a first linear driving device 25 and a driving cylinder 26, the first linear driving device 25 is in transmission connection with the winding forming sliding block 21, and the driving cylinder 26 is in transmission connection with the auxiliary forming sliding block 23; in the reset state, the driving cylinder 26 is used to apply a preset pressure to the auxiliary forming sliding block 23 to keep the auxiliary forming sliding block 23 protruding towards one end of the winding forming sliding block 21; during the stamping process, the driving force of the first linear driving device 25 is greater than the preset pressure, so as to push the auxiliary forming sliding block 23 to move synchronously with the winding forming sliding block 21 through the abutment of the driving surface 211 and the auxiliary forming sliding block 23. In this process, the driving cylinder 26 functions as a spring to ensure the stable contact between the winding forming sliding block 21 and the auxiliary forming sliding block 23. Based on the above structure, the reliability of the synchronous movement of the auxiliary forming sliding block 23 and the winding forming sliding block 21 can be ensured, and the control is simple. When the stamping is completed, the first linear driving device 25 and the driving cylinder 26 need to be reset in sequence. After the first linear driving device 25 is reset, the spring body 901 needs to be moved out of a pair of forming limiting heads 231, and then the driving cylinder 26 is controlled to be reset, so as to avoid the interference between the auxiliary forming sliding block 23 and the spring body 901 in the synchronous resetting process.

[0057] Further, in combination with Figure 13As shown, the spring sheet in the embodiment is arranged on one side of the conveying belt 8 in the width direction, and the spring sheet is arranged in the extension direction of the conveying belt 8. The conveying belt 8 penetrates between a pair of forming limiting heads 231, and the conveying belt 8 is moved in the extension direction of the conveying belt 8 to realize that each spring sheet enters between the pair of forming limiting heads 231 in turn to be punched. The guide block 241 is provided with an avoiding limiting groove 245, which is arranged at the end of the gap adjusting guide surface 244 away from the auxiliary forming slider 23. When the winding forming slider 21 is in the reset state, the guide roller 2421 is located in the avoiding limiting groove 245. When the winding forming slider 21 is reset, the forming punch 22 needs to move backward to leave a feeding space for the spring sheet to move along the conveying belt 8. The traditional method is to directly pull the winding forming slider 21 backward to leave the space, which can cause the reset stroke of the winding forming slider 21 to be too long, so that the space compactness of the device is poor. By arranging the avoiding limiting groove 245 and using the cooperation between the guide roller 2421 and the avoiding limiting groove 245, when the winding forming slider 21 is reset, the forming punch 22 swings backward with the transmission frame 242 to leave the feeding space of the spring sheet, so as to shorten the moving stroke of the winding forming slider 21 and effectively improve the structural compactness and action reliability.

[0058] Further, the winding spring stamping forming device in the embodiment is combined with Figure 6 As shown, the winding spring stamping forming device further comprises a seat body 4, the winding stamping module 2 is arranged on the seat body 4, the seat body 4 is provided with a moving groove 41 for accommodating the movement of the conveying belt 8, the winding forming slider 21 and the auxiliary forming slider 23 are slidingly arranged on the seat body 4, and the guide block 241 is installed on the seat body 4.

[0059] Further, the winding spring stamping forming device in the embodiment is combined with Figure 3 As shown, the spring sheet comprises a connecting plate 902 located at the tail end of the plate body 900, and the length direction of the plate body 900 and the connecting plate 902 as a whole is inclined to the length direction of the conveying belt 8 (that is, the plate body 900 and the connecting plate 902 as a whole are not perpendicular to the length direction of the conveying belt 8). The tail end stamping module 3 is used for stamping the connecting plate 902 to form a connecting seat 903, and the connecting seat 903 is provided with a cavity 9030. The tail end stamping module 3 is located at the rear end station of the winding stamping module 2. Figures 10 to 14 As shown, the tail end stamping module 3 comprises:

[0060] As shown, the pair of upper and lower pre-bending punches 31 are oppositely arranged, and the pair of pre-bending punches 31 can be moved up and down to be combined on both sides of the connecting plate 902, so as to pre-bend part of the connecting plate 902 into a U-shaped structure 9021 corresponding to part of the cavity 9030;

[0061] The inner core rod 34 is located at the rear end of the pre-bending punch 31, and the outer forming upper punch 32 and the outer forming lower punch 33 are vertically opposite, and the outer forming upper punch 32 and the outer forming lower punch 33 can be combined to move up and down to punch the connecting plate 902 into the connecting seat 903, and in this process, the inner core rod 34 is arranged in the bag cavity 9030 to support the inner wall of the bag cavity 9030, so as to ensure the shape quality of the bag cavity 9030.

[0062] The inner core moving seat 341 is slidably arranged in the seat body 4, the sliding direction of the inner core moving seat 341 is parallel to the extension direction of the inner core rod 34, the sliding direction of the inner core moving seat 341 corresponds to the width direction of the connecting plate 902, the inner core rod 34 is installed on the inner core moving seat 341, and the transmission connecting rod 35 is rotatably connected to the inner core moving seat 341;

[0063] The first linear driving device 25 includes a driving plate 251 moving linearly, the winding forming slider 21 is installed on the driving plate 251, the driving plate 251 is provided with a driving slider 252, the driving slider 252 is provided with a transmission groove 2520, the transmission connecting rod 35 is provided with a guide column 351 slidably matched with the transmission groove 2520 at an end away from the inner core moving seat 341, and the guide column 351 is in a cylindrical shape as a whole.

[0064] Based on the above structure, when the driving plate 251 drives the winding forming slider 21 to move to punch the elastic piece provided on the winding stamping module 2 of the winding layer, synchronously, the driving plate 251 drives the driving slider 252 to move to control the position of the inner core rod 34, compared with using two driving devices to respectively control the movement of the inner core rod 34 and the winding forming slider 21, each station can realize stable synchronous work, so as to improve the work efficiency and reduce the hardware cost. Specifically, the driving slider 252 drives the inner core rod 34 to reciprocate in sequence through the transmission groove 2520, the guide column 351, the transmission connecting rod 35, and the inner core moving seat 341, in the forming process of the connecting seat 903, the inner core rod 34 moves to the position of penetrating into the bag cavity 9030, and after the connecting seat 903 is completed by stamping and forming, the inner core rod 34 is reset to the outside of the bag cavity 9030 with the inner core moving seat 341, so as to prevent interference of the conveying material belt 8 in the conveying process.

[0065] Further, as Figure 11As shown, the tail end stamping module 3 of the scroll spring stamping forming device in the embodiment includes a lower moving block 36, and an outer forming lower punch 33 is installed on the lower moving block 36. The outer forming lower punch 33 includes a floating punch 331 and a limiting punch 332 adjacent to one side of the floating punch 331. The floating punch 331 is floatingly installed on the lower moving block 36. The lower moving block 36 is provided with an elastic member 361 corresponding to the bottom of the floating punch 331. The floating punch 331 is opposite to the lower side of the U-shaped structure 9021. The limiting punch 332 is provided with a lower limiting arc groove 3320. The outer forming upper punch 32 is provided with an upper limiting arc groove 320 corresponding to the lower limiting arc groove 3320.

[0066] When the outer forming upper punch 32 and the outer forming lower punch 33 are opened and reset, the floating punch 331 protrudes upward from the lower limiting arc groove 3320.

[0067] In the process that the outer forming upper punch 32 and the outer forming lower punch 33 move to be combined, the floating punch 331 first contacts and pushes the U-shaped structure 9021 to bend. In the process of bending, the outer side of the U-shaped structure 9021 is guided and slid by the lower limiting arc groove 3320 and the upper limiting arc groove 320 in turn to be turned around the inner core rod 34, and finally a connecting seat 903 is formed. In this process, the limiting elastic member 361 of the inner core rod 34 is compressed. When the outer forming upper punch 32 and the outer forming lower punch 33 are combined, the outer forming upper punch 32 is in abutment with the limiting punch 332. Based on the above device, the precise control of the bending forming of the connecting seat 903 can be realized. Specifically, the upper pre-bending punch 31 shares one lifting driving device with the outer forming upper punch 32, and the lower pre-bending punch 31 shares another lifting driving device with the outer forming lower punch 33. In order to prevent the inner core rod 34 from being bent in the process of stamping and forming the connecting seat 903, a supporting portion 321 is arranged on one side of the outer forming upper punch 32. When the inner core rod 34 moves to a position passing through the package cavity 9030, the front end of the inner core rod 34 is exposed outside the package cavity 9030. When the outer forming upper punch 32 and the outer forming lower punch 33 are combined, the supporting portion 321 abuts against the front end of the inner core rod 34 exposed outside the package cavity 9030. At this time, the supporting portion 321 and the inner core moving seat 341 support the two ends of the inner core rod 34 respectively, which can effectively prevent the inner core rod 34 from being bent by the floating punch 331.

[0068] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative labor, and these embodiments will fall within the protection scope of the present application.

Claims

1. A spiral spring stamping forming apparatus for stamping a spring sheet into a coil spring, wherein the spring sheet before stamping comprises a linearly extending plate (900), and the coil spring after stamping comprises a spring body (901) formed by winding the plate (900), characterized in that: The winding stamping module (2) comprises: a winding forming slider (21) moving linearly along the extension direction of the plate body (900) to be stamped, the winding forming slider (21) facing the front end of the plate body (900); a forming punch (22) arranged on the winding forming slider (21); an auxiliary forming slider (23) comprising a pair of forming limiting heads (231) located at the front end of the forming punch (22), the plate body (900) to be stamped being located between the pair of forming limiting heads (231) in the thickness direction, the elastic sheet being exposed outside the pair of forming limiting heads (231) at one end of the winding forming slider (21), and a discharging gap (220) being arranged between the forming limiting head (231) and the forming punch (22); a gap adjusting mechanism in transmission connection with the forming punch (22); in the stamping process, the winding forming slider (21) drives the forming punch (22) to move along the extension direction of the plate body (900), after the forming punch (22) contacts the plate body (900), the forming punch (22) is used for stamping and bending the plate body (900) exposed outside the pair of forming limiting heads (231), the auxiliary forming slider (23) is used for driving the forming limiting head (231) to move with the forming punch (22), in this process, the plate body (900) is continuously stamped and bent to form a spring body (901), and the gap adjusting mechanism is used for adjusting the width of the discharging gap (220); the gap adjusting mechanism comprises a guide block (241) and a transmission frame (242), the transmission frame (242) is rotatably installed on the winding forming slider (21), the forming punch (22) is installed on the transmission frame (242), the transmission frame (242) is provided with a sliding connection part, and the guide block (241) is provided with a sliding groove matched with the sliding connection part; the sliding groove is a gap adjusting guide surface (244) arranged on the guide block (241) near one side of the transmission frame (242), the sliding connection part abuts on the gap adjusting guide surface (244), and the transmission frame (242) is connected with an elastic member for applying an elastic force to the transmission frame (242) to keep the sliding connection part always abutting on the gap adjusting guide surface (244).

2. A scroll spring press forming apparatus according to claim 1, wherein: the sliding connection part is a guide roller (2421) rotatably installed on the transmission frame (242), the guide block (241) is located above the guide roller (2421), and the gap adjusting guide surface (244) gradually inclines upward in the direction in which the winding forming slider (21) moves towards the auxiliary forming slider (23).

3. A scroll spring press forming apparatus according to claim 1, wherein: the guide block (241) is located above the guide roller (2421), the forming punch (22) is a stamping roller rotatably installed on the transmission frame (242), and the axis height of the stamping roller is always located on the upper side of the plate body (900).

4. A scroll spring press forming apparatus according to claim 2, wherein: The winding forming slider (21) is provided with a driving surface (211) at the front end for abutting and cooperating with the auxiliary forming slider (23), and the winding stamping module (2) further comprises a first linear driving device (25) and a driving cylinder (26), the first linear driving device (25) is in transmission connection with the winding forming slider (21), and the driving cylinder (26) is in transmission connection with the auxiliary forming slider (23); In the reset state, the driving cylinder (26) is used for applying a preset pressure to the auxiliary forming slider (23) to keep the auxiliary forming slider (23) extending towards one end of the winding forming slider (21); During stamping, the driving force of the first linear driving device (25) is greater than the preset pressure, so that the auxiliary forming slider (23) is pushed to move synchronously with the winding forming slider (21) through the abutting of the driving surface (211) and the auxiliary forming slider (23).

5. A scroll spring press forming apparatus according to claim 4, wherein: The elastic sheet is arranged on one side of the conveying belt (8) in the width direction, and the elastic sheet is arranged in the extension direction of the conveying belt (8). The conveying belt (8) penetrates between a pair of forming limiting heads (231), and the conveying belt (8) is moved in the extension direction to realize that each elastic sheet enters between the pair of forming limiting heads (231) in turn for stamping. The guide block (241) is provided with an avoiding limiting groove (245), and the avoiding limiting groove (245) is arranged at the end away from the auxiliary forming slider (23) of the gap adjusting guide surface (244). When the winding forming slider (21) is in the reset state, the guide roller (2421) is located in the avoiding limiting groove (245).

6. A scroll spring press forming apparatus according to claim 5, wherein: Further comprising a seat body (4), the winding stamping module (2) is arranged on the seat body (4), the seat body (4) is provided with a moving groove (41) for accommodating the movement of the conveying belt (8), the winding forming slider (21) and the auxiliary forming slider (23) are slidably arranged on the seat body (4), and the guide block (241) is installed on the seat body (4).

7. A scroll spring press forming apparatus according to claim 6, wherein: The elastic sheet comprises a connecting plate (902) at the tail end of the plate body (900), and the length direction of the plate body (900) and the connecting plate (902) is inclined to the length direction of the conveying belt (8). Further comprising a tail end stamping module (3) for stamping the connecting plate (902) to form a connecting seat (903), the connecting seat (903) is provided with a package cavity (9030), the tail end stamping module (3) is located at the rear end position of the winding stamping module (2), and the tail end stamping module (3) comprises: A pair of upper and lower opposite pre-bending punches (31) can move up and down to coincide with both sides of the connecting plate (902), so as to pre-bend part of the connecting plate (902) into a U-shaped structure (9021) corresponding to part of the shape of the package cavity (9030); The inner core rod (34) located at the rear end of the pre-bending punch (31) and the upper and lower outer forming upper punch (32) and outer forming lower punch (33) opposite to each other, the outer forming upper punch (32) and the outer forming lower punch (33) can be moved to close to stamp the connecting plate (902) into the connecting seat (903), and in this process, the inner core rod (34) is arranged in the package cavity (9030) for supporting the inner wall of the package cavity (9030); The inner core moving seat (341) is slidably arranged in the seat body (4), the sliding direction of the inner core moving seat (341) is parallel to the extension direction of the inner core rod (34), the sliding direction of the inner core moving seat (341) corresponds to the width direction of the connecting plate (902), the inner core rod (34) is installed on the inner core moving seat (341), and the transmission connecting rod (35) is rotatably connected to the inner core moving seat (341); The first linear driving device (25) comprises a driving plate (251) moving linearly, the winding forming slider (21) is installed on the driving plate (251), the driving plate (251) is provided with a driving slider (252), the driving slider (252) is provided with a transmission groove (2520), and the transmission connecting rod (35) is provided with a guide column (351) slidably matched with the transmission groove (2520) at one end away from the inner core moving seat (341).

8. A scroll spring press forming apparatus according to claim 7, wherein: The tail end stamping module (3) comprises a lower moving block (36), the outer forming lower punch (33) is installed on the lower moving block (36), the outer forming lower punch (33) comprises a floating punch (331) and a limiting punch (332) adjacent to one side of the floating punch (331), the floating punch (331) is floatingly installed on the lower moving block (36), the lower moving block (36) is provided with an elastic element (361) corresponding to the bottom of the floating punch (331), the floating punch (331) is opposite to the lower side of the U-shaped structure (9021), the limiting punch (332) is provided with a lower limiting arc groove (3320), and the outer forming upper punch (32) is provided with an upper limiting arc groove (320) corresponding to the lower limiting arc groove (3320); When the outer forming upper punch (32) and the outer forming lower punch (33) are opened and reset, the floating punch (331) protrudes upward out of the lower limiting arc groove (3320); In the process that the outer forming upper punch (32) and the outer forming lower punch (33) move to close, the floating punch (331) first contacts the U-shaped structure (9021) to push the U-shaped structure (9021) to bend, in the process of bending, the outer side surface of the U-shaped structure (9021) is guided and slid in the lower limiting arc groove (3320) and the upper limiting arc groove (320) in sequence to overturn around the inner core rod (34), and finally the connecting seat (903) is formed.

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