DFN shell punch forming equipment with anti-overflow function

Abstract

The invention discloses DFN shell punch forming equipment with an anti-overflow function, and relates to the technical field of DFN shell punch forming equipment. Comprising a conveying device, a rotary table, a first suction cup assembly, a first driving assembly, a punching assembly, a second suction cup assembly, a base table, a punching device, a rotary base plate, a first electric telescopic rod and a second driving assembly. The first stamping blocks on the stamping die clamp and position the shell from the four sides, and clamping and fixing of the shells of different sizes are achieved. The control system enables the punching groove in the second punching block to slide to the position, needing to be cut, of the pin according to the length, needing to be reserved, of the pin, and the function of adjusting the cutting position according to the requirement for different cutting lengths of the pin is achieved. The tool bit is matched with the groove wall of the punching groove to cut off the redundant part of the pin, the cut-off pin slides to the waste groove from the inclined guide slope, and punching of the pin and waste collection are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of DFN shell stamping and forming, in particular to a DFN shell stamping and forming device with the function of preventing material overflow. Background Art

[0002] DFN (Dual Flat No Leads) packaging is a leadless, double-sided flat electronic packaging process, characterized by compact size, efficient heat dissipation, low cost and good electromagnetic compatibility. It is widely used in miniaturized, highly integrated electronic devices, especially in the automotive field. The development trend of DFN packaging is to pursue higher integration, smaller size and better heat dissipation performance to meet the growing demand for electronic devices.

[0003] At present, there is a DFN shell with an anti-overflow function, which needs to be stamped when processed. However, the existing technology requires multiple devices to cooperate during stamping, the steps are cumbersome, and the production efficiency is low. When punching the pins, if the cut waste is not recycled, it will cause a waste of resources. When punching for a long time, the wear of the punching head will cause scratches on the pins, and the pins will not be fully stamped. Summary of the invention

[0004] The object of the present invention is to provide a DFN shell stamping and forming device with the function of preventing overflow, so as to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a DFN shell stamping and forming equipment with the function of preventing overflow, comprising a base, a turntable and a transmission device, a stamping device is installed on the base, a second drive assembly is installed in the base, the second drive assembly is meshed with the stamping device for transmission, the transmission device is arranged on one side of the base, the turntable is arranged between the base and the transmission device, a rotating base plate is installed on the turntable, a first suction cup assembly is installed at one end of the rotating base plate, a second suction cup assembly and a first electric telescopic rod are respectively installed at the other end of the rotating base plate, a punching assembly is installed on the output shaft of the first electric telescopic rod, a first drive assembly is installed on the rotating base plate, and the first drive assembly is meshed with the punching assembly for transmission; the stamping device comprises a sliding table, a stamping assembly and a wear monitoring assembly are respectively installed on the sliding table; a support plate is provided on the sliding table, a sliding channel is provided on the sliding table, the sliding channel runs through the support plate, a first stamping block is provided on the sliding table, a stamping groove is provided on the first stamping block, and a second sliding column is provided at the bottom end of the sliding table.

[0006] The base is equipped with a control system, which is used to control the entire stamping and forming equipment. The first suction cup assembly and the second suction cup assembly are both composed of an electric telescopic rod and an electric suction cup. The electric telescopic rod is used to control the electric suction cup to move up and down, and the electric suction cup is used to absorb the DFN shell; the turntable is used to drive the components on it to rotate; the number and size of the stamping grooves on the first stamping block match the pins.

[0007] The control system turns on the first suction cup assembly, which absorbs and lifts the shell to be cut. Then, the turntable is turned on. The turntable drives the first suction cup assembly to rotate above the stamping device through the rotating base plate. The first suction cup assembly descends and causes the pins on the shell to fall on the top of the stamping plate. The four stamping plates lift the pins on the four sides of the shell so that the shell is suspended above the support plate. Then, the turntable rotates again to align the second suction cup assembly and the punching assembly with the shell to be cut. At the same time, the first suction cup assembly absorbs the next shell.

[0008] The stamping device also includes a bottom tray, which is installed on the base, and a third slide groove is provided on the bottom tray. A second toothed disc is rotatably installed on the bottom end of the bottom tray, and a second curved groove is provided on the second toothed disc. An L-shaped slide groove plate is provided on the bottom tray, and the sliding table is installed between the L-shaped slide groove plates. The second slide column is slidingly connected to the third slide groove and the second curved groove respectively; the second drive assembly includes a second drive motor, and the second drive motor is installed in the base. A second gear is installed on the output shaft of the second drive motor, and the second gear is meshed with the second toothed disc for transmission.

[0009] The control system turns on the second drive assembly, the second drive motor drives the second gear to rotate, the second gear drives the second toothed disc to rotate, and the second toothed disc drives the sliding table to rotate through the second slide column. Since the sliding table is constrained by the L-shaped slide plate, and the second slide column is constrained by the third slide groove, the sliding table converts the rotation into a straight line sliding along the third slide groove, and the four sliding tables slide and move closer, driving the side surfaces of the first stamping block thereon to clamp and position the outer shell from four sides, thereby realizing the clamping and fixing of outer shells of different sizes; the control system turns on the second electric telescopic rod according to the length of the pin that needs to be retained, and the second electric telescopic rod drives the second stamping block to slide, so that the punching groove on the second stamping block slides to the position where the pin needs to be cut, thereby realizing the function of adjusting the cutting position according to the requirements of different cutting lengths of the pin.

[0010] The control system records the number of revolutions of the second drive motor, and then turns on the first drive motor so that the first drive motor drives the first toothed disc to rotate through the first gear, and the first toothed disc drives the adjusting slider to slide and approach along the second slide groove on the adjusting tray, and the adjusting slider drives the cutter head to slide, and the control system rotates the first drive motor a corresponding number of revolutions according to the number of revolutions of the second drive motor so that the cutter head corresponds to the position of the punching groove, and the control system turns on the first electric telescopic rod, and the first electric telescopic rod drives the punching assembly to descend, and the cutter head cooperates with the groove wall of the punching groove to cut off the excess part of the pin, and the cut pin slides from the inclined guide ramp to the waste trough, thereby realizing the punching of the pin and the collection of waste.

[0011] The sliding table is also provided with a first slide rail and a second slide rail, the sliding table is respectively provided with a first connecting member and a second connecting member, the sliding table is provided with a waste trough, the sliding table is provided with an inclined guide ramp, the sliding table is provided with a bracket, the bracket is installed with a stamping assembly, and a wear monitoring assembly is installed between the first connecting member and the second connecting member.

[0012] The stamping assembly includes a second electric telescopic rod, which is installed on a bracket, a second stamping block is installed on the output shaft of the second electric telescopic rod, a positioning column is installed on the second stamping block, and the positioning column is slidably installed in the sliding channel; a groove is provided on the second stamping block, a stamping plate and a punching groove are provided on the second stamping block, a fourth slide groove is provided on the second stamping block, and the second stamping block is installed on the first slide rail through the fourth slide groove.

[0013] The positioning column and the sliding channel are used to improve the stability of the second punching block when it slides, and improve the punching quality of the pin; the groove is used to prevent position interference with the screw rod, and at the same time, the structure is more compact; the stamping plate is higher than the first stamping block, and the bottom end of the stamping plate is higher than the top end of the first stamping block.

[0014] After the pin is punched, the control system controls the first electric telescopic rod to retract, and at the same time, the second suction cup assembly is turned on. The second suction cup assembly descends and adsorbs the punched shell. After adsorption, it further descends, and the second suction cup assembly drives the shell to press down. The compressed pin begins to curl up under the action of the first stamping block and the stamping groove, and gradually changes from a horizontal state to a vertical state. The pin is embedded in the stamping groove. When the bottom of the shell contacts the support plate, the second suction cup assembly stops descending. At this time, the top of the shell is flush with the top of the first stamping block, realizing the first stamping of the pin, and then the control system turns on the second Second electric telescopic rod, the second electric telescopic rod drives the second stamping block to slide along the first slide rail. Since the bottom end of the stamping plate is higher than the top end of the first stamping block, the stamping plate will slide over the top end of the first stamping block and generate pressure on the vertical pins. The vertical pins bend toward the top surface of the DFN shell and become horizontal again. At this time, the pins fit with the top surface of the shell, thereby completing the secondary stamping of the pins; the control system controls the stamping assembly to reset, and then uses the second suction cup assembly and the turntable to place the finished DFN shell on the transmission device, and repeats this cycle to achieve batch stamping of DFN shells.

[0015] The wear monitoring component includes a monitoring motor, which is installed on the second connecting member. The output shaft of the monitoring motor passes through the second connecting member and is installed with a screw rod. The screw rod is rotatably installed on the first connecting member and the second connecting member. The screw rod is provided with a thread. A sliding support is threadedly installed on the screw rod. The sliding support is slidably connected to the sliding table through the second slide rail, and a monitor is installed on the sliding support.

[0016] The monitor includes a monitoring shell, a fixed block is installed in the monitoring shell, spring sheets are symmetrically installed on the fixed block, the spring sheets form an angle with each other, spherical contacts are installed on the spring sheets, a diaphragm is installed on the monitoring shell, piezoelectric elements are installed between the diaphragms, a sliding measuring block is slidably installed in the monitoring shell, a friction block is installed on the sliding measuring block, the surface of the friction block is made of a material with a high friction coefficient, bumps are symmetrically installed on both sides of the sliding measuring block, and a reset spring is installed between the sliding measuring block and the monitoring shell.

[0017] When the stamping assembly may be worn out after long-term use, the control system starts the monitoring motor, which drives the screw to rotate, and the rotation of the screw drives the sliding support to rotate. Since the sliding support can only slide along the second slide rail, the sliding support converts the rotation into sliding on the second slide rail. The sliding support drives the friction block on the monitor to slide, and the friction block and the bottom of the stamping plate produce friction. Under the action of friction, the friction block drives the sliding measuring block and the monitoring housing to produce relative displacement. The protrusions on both sides of the sliding measuring block squeeze the spring sheet, and the spherical contact on the spring sheet squeezes the piezoelectric element in the diaphragm. The piezoelectric element is compressed to generate an electric charge, which is transmitted to the control system through the wire. The control system analyzes the stamping according to the difference in the received electrical signal changes. Wear on the bottom of the plate. When the stamping plate is worn, the thickness of the worn part decreases, and the contact area with the friction block decreases, thereby reducing the friction force. The smaller the friction force, the smaller the relative displacement of the sliding measuring block. Since the spring sheets form an angle with each other, the smaller the relative displacement of the sliding measuring block, the smaller the extrusion force on the spring sheet, and the smaller the curvature of the spring sheet, the weaker the electrical signal generated by the piezoelectric element, causing a fluctuation in the entire set of electrical signal curves. The control system compares the difference in fluctuations with the standard. When the fluctuation value is higher than the standard value, it proves that the wear is serious and the stamping plate needs to be repaired or replaced, thereby realizing the monitoring of the wear of the stamping plate to prevent insufficient stamping or scratches on the pins due to wear.

[0018] The punching and cutting assembly includes an adjusting tray, which is installed on the first electric telescopic rod, a first toothed disc is rotatably installed on the adjusting tray, an adjusting slider is slidably installed on the adjusting tray, the adjusting slider is slidably connected to the first toothed disc, a cutter head is installed on the adjusting slider, a spring telescopic rod is installed on the adjusting slider, and a fixed pressure plate is installed at the bottom end of the spring telescopic rod; the first driving assembly includes a first driving motor, the first driving motor is installed in the base, a first gear is installed on the output shaft of the first driving motor, and the first gear is meshed with the first toothed disc for transmission.

[0019] The first toothed disc is provided with a first curved groove, the adjusting tray is provided with a first slide groove and a second slide groove, the adjusting slider is provided with a sliding block and a first slide column, the sliding block is slidably installed in the first slide groove, and the first slide column is slidably connected to the second slide groove and the first curved groove respectively.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The second drive assembly is used to drive the second toothed disc to rotate, and the second toothed disc drives the four sliding tables to slide and move closer, driving the side of the first punching block on it to clamp and position the shell from four sides, so as to achieve the clamping and fixation of shells of different sizes; the control system makes the punching groove on the second punching block slide to the position where the pin needs to be cut according to the length of the pin that needs to be retained, so as to achieve the function of adjusting the cutting position according to the requirements of different cutting lengths of the pin.

[0022] 2. Use the first drive assembly to drive the first toothed disc to rotate, and adjust the position of the adjusting slider through the first toothed disc so that the cutter head corresponds to the position of the punching groove; the cutter head cooperates with the groove wall of the punching groove to cut off the excess part of the pin, and the cut pin slides from the inclined guide ramp to the waste groove, thereby realizing the punching of the pin and the collection of waste.

[0023] 3. Use the second suction cup assembly to push the shell down, and complete the first punching of the pins through the cooperation of the first punching and the punching groove; use the second electric telescopic rod to drive the punching plate to generate pressure on the vertical pins, so that the vertical pins bend toward the top surface of the DFN shell and become horizontal again, thereby completing the secondary punching of the pins and realizing double punching of the pins.

[0024] 4. Use the monitoring motor to drive the monitor to generate friction between the friction block and the bottom of the stamping plate, and convert the friction force into the displacement of the sliding measuring block, and then convert the displacement of the sliding measuring block into the pressure of the spring sheet on the piezoelectric element. The piezoelectric element is under pressure and outputs an electrical signal to the control system. When the stamping plate is worn, the control system compares the difference in fluctuations with the standard. When the fluctuation value is higher than the standard value, it proves that the wear is serious and the stamping plate needs to be repaired or replaced, thereby realizing the monitoring of the wear of the stamping plate to prevent insufficient stamping or scratches on the pins due to wear.

[0025] 5. The turntable is used in conjunction with the first suction cup assembly and the second suction cup assembly to alternately absorb and carry the shell to be processed and the finished shell after processing, so as to realize rapid loading and unloading of the DFN shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall stereogram of the stamping and forming equipment of the present invention;

[0027] Figure 2 is a perspective view of the punching assembly of the present invention;

[0028] Figure 3 A three-dimensional diagram of an adjusting slider of the present invention;

[0029] Figure 4 The three-dimensional drawing of the punching device of the present invention is Figure 1 ;

[0030] Figure 5 The three-dimensional drawing of the punching device of the present invention is Figure 2 ;

[0031] Figure 6 A three-dimensional diagram of a sliding platform of the present invention;

[0032] Figure 7 For the present invention Figure 6 A partial enlarged view of the middle A area;

[0033] Figure 8 is a three-dimensional diagram of the stamping assembly of the present invention;

[0034] Fig. 9 is a perspective view of the wear monitoring assembly of the present invention;

[0035] Fig.10 is a three-dimensional diagram of the monitor of the present invention;

[0036] Fig.11 The three-dimensional drawing of the punching device of the present invention is Figure 3 .

[0037] In the figure: 1, transmission device; 2, turntable; 3, first suction cup assembly; 4, first drive assembly; 5, punching assembly; 6, second suction cup assembly; 7, base; 8, punching device; 9, rotating base plate; 10, first electric telescopic rod; 11, second drive assembly; 51, first toothed disc; 511, first curved groove; 52, adjustment tray; 53, cutter head; 54, spring telescopic rod; 55, fixed pressure plate; 56, adjustment slider; 521, first slide groove; 522, second slide groove; 561, sliding block; 562, first slide column; 81, second toothed disc; 82, bottom tray; 83, sliding table; 84, punching assembly; 85, wear monitoring assembly; 811, second curved groove; 821, third slide groove; 831, waste chute; 832, inclined guide ramp; 833, second slide column; 834, bracket; 83 5. First slide rail; 836. Support plate; 837. First punching block; 838. First connecting piece; 839. Second slide rail; 8310. Second connecting piece; 8361. Sliding channel; 8371. Punching groove; 841. Second electric telescopic rod; 842. Second punching block; 843. Positioning column; 8421. Fourth slide groove; 8422. Groove; 8423. Punching groove; 8424. Punching Plate; 851, monitoring motor; 852, screw rod; 853, sliding support; 854, monitor; 8541, friction block; 8542, monitoring housing; 8543, fixing block; 8544, spring sheet; 8545, spherical contact; 8546, diaphragm; 8547, piezoelectric element; 8548, reset spring; 8549, sliding measuring block; 8540, bump; 822, L-shaped slide plate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-Figure 11As shown, the present invention provides a technical solution of DFN shell stamping and forming equipment with the function of preventing overflow: comprising a base 7, a turntable 2 and a transmission device 1, a stamping device 8 is installed on the base 7, a second driving component 11 is installed in the base 7, the second driving component 11 is meshed with the stamping device 8 for transmission, the transmission device 1 is arranged on one side of the base 7, the turntable 2 is arranged between the base 7 and the transmission device 1, a rotating base plate 9 is installed on the turntable 2, a first suction cup component 3 is installed at one end of the rotating base plate 9, and a second suction cup component 6 and a first electric telescopic rod 10 are respectively installed at the other end of the rotating base plate 9, A punching assembly 5 is installed on the output shaft of the first electric telescopic rod 10, and a first driving assembly 4 is installed on the rotating base plate 9, and the first driving assembly 4 is engaged with the punching assembly 5 for transmission; the stamping device 8 includes a sliding table 83, on which a stamping assembly 84 and a wear monitoring assembly 85 are respectively installed; a support plate 836 is provided on the sliding table 83, and a sliding channel 8361 is provided on the sliding table 83, and the sliding channel 8361 runs through the support plate 836, a first stamping block 837 is provided on the sliding table 83, and a stamping groove 8371 is provided on the first stamping block 837, and a second sliding column 833 is provided at the bottom end of the sliding table 83.

[0040] A control system is provided inside the base 7, and the control system is used to control the entire stamping and forming equipment. The first suction cup assembly 3 and the second suction cup assembly 6 are both composed of an electric telescopic rod and an electric suction cup, the electric telescopic rod is used to control the electric suction cup to move up and down, and the electric suction cup is used to absorb the DFN shell; the turntable 2 is used to drive the components thereon to rotate; the number and size of the stamping grooves 8371 on the first stamping block 837 match the pins.

[0041] The stamping device 8 also includes a bottom tray 82, which is installed on the base 7. The bottom tray 82 is provided with a third slide groove 821. The second toothed disc 81 is rotatably installed at the bottom end of the bottom tray 82. The second toothed disc 81 is provided with a second curved groove 811. The bottom tray 82 is provided with an L-shaped slide plate 822. The sliding table 83 is installed between the L-shaped slide plates 822. The second slide column 833 is slidingly connected to the third slide groove 821 and the second curved groove 811 respectively; the second driving assembly 11 includes a second driving motor, which is installed in the base 7. A second gear is installed on the output shaft of the second driving motor, and the second gear is meshed with the second toothed disc 81 for transmission.

[0042] The sliding table 83 is also provided with a first sliding rail 835 and a second sliding rail 839, the sliding table 83 is respectively provided with a first connecting member 838 and a second connecting member 8310, the sliding table 83 is provided with a waste trough 831, the sliding table 83 is provided with an inclined guide ramp 832, the sliding table 83 is provided with a bracket 834, the bracket 834 is installed with a stamping assembly 84, and a wear monitoring assembly 85 is installed between the first connecting member 838 and the second connecting member 8310.

[0043] The stamping assembly 84 includes a second electric telescopic rod 841, which is installed on the bracket 834. A second stamping block 842 is installed on the output shaft of the second electric telescopic rod 841. A positioning column 843 is installed on the second stamping block 842. The positioning column 843 is slidably installed in the sliding channel 8361; a groove 8422 is provided on the second stamping block 842, a stamping plate 8424 and a punching groove 8423 are provided on the second stamping block 842, a fourth slide groove 8421 is provided on the second stamping block 842, and the second stamping block 842 is installed on the first slide rail 835 through the fourth slide groove 8421.

[0044] The positioning column 843 and the sliding channel 8361 are used together to improve the stability of the second punching block when sliding, and improve the punching quality of the pin; the groove 8422 is used to prevent position interference with the screw rod 852, and at the same time, the structure is more compact; the stamping plate 8424 is higher than the first stamping block 837, and the bottom end of the stamping plate 8424 is higher than the top end of the first stamping block 837.

[0045] The wear monitoring assembly 85 includes a monitoring motor 851, which is installed on the second connecting member 8310. The output shaft of the monitoring motor 851 passes through the second connecting member 8310 and is installed with a screw rod 852. The screw rod 852 is rotatably installed on the first connecting member 838 and the second connecting member 8310. The screw rod 852 is provided with a thread, and a sliding support 853 is threadedly installed on the screw rod 852. The sliding support 853 is slidably connected to the sliding table 83 through the second sliding rail 839, and a monitor 854 is installed on the sliding support 853.

[0046] The monitor 854 includes a monitoring shell 8542, in which a fixed block 8543 is installed, on which spring sheets 8544 are symmetrically installed, the spring sheets 8544 are angled with each other, spherical contacts 8545 are installed on the spring sheets 8544, a diaphragm 8546 is installed on the monitoring shell 8542, piezoelectric elements 8547 are installed between the diaphragms 8546, a sliding measuring block 8549 is slidably installed in the monitoring shell 8542, a friction block 8541 is installed on the sliding measuring block 8549, the surface of the friction block 8541 is made of a material with a high friction coefficient, protrusions 8540 are symmetrically installed on both sides of the sliding measuring block 8549, and a reset spring 8548 is installed between the sliding measuring block 8549 and the monitoring shell 8542.

[0047] The punching assembly 5 includes an adjusting tray 52, which is installed on the first electric telescopic rod 10. A first toothed disc 51 is rotatably installed on the adjusting tray 52. ​​An adjusting slider 56 is slidably installed on the adjusting tray 52. ​​The adjusting slider 56 is slidably connected to the first toothed disc 51. A cutter head 53 is installed on the adjusting slider 56. A spring telescopic rod 54 is installed on the adjusting slider 56. A fixed pressure plate 55 is installed at the bottom end of the spring telescopic rod 54. The first driving assembly 4 includes a first driving motor, which is installed in the base 7. A first gear is installed on the output shaft of the first driving motor, and the first gear is meshed with the first toothed disc 51 for transmission.

[0048] The first toothed disc 51 is provided with a first curved groove 511, the adjusting tray 52 is provided with a first sliding groove 521 and a second sliding groove 522, the adjusting slider 56 is provided with a sliding block 561 and a first sliding column 562, the sliding block 561 is slidably installed in the first sliding groove 521, and the first sliding column 562 is slidably connected to the second sliding groove 522 and the first curved groove 511 respectively.

[0049] The working principle of the present invention is as follows: the control system turns on the first suction cup assembly 3, the first suction cup assembly 3 sucks and lifts the shell to be cut, then turns on the turntable 2, the turntable 2 drives the first suction cup assembly 3 to rotate above the punching device 8 through the rotating base plate 9, the first suction cup assembly 3 descends and causes the pins on the shell to fall on the top of the punching plate 8424, the four punching plates 8424 lift the pins on the four sides of the shell, so that the shell is suspended above the support plate 836, then the turntable 2 rotates again, so that the second suction cup assembly 6 and the punching assembly 5 are aligned with the shell to be cut, and at the same time, the first suction cup assembly 3 sucks the next shell.

[0050] The control system turns on the second drive assembly 11, the second drive motor drives the second gear to rotate, the second gear drives the second toothed disc 81 to rotate, and the second toothed disc 81 drives the sliding table 83 to rotate through the second slide column 833. Since the sliding table 83 is constrained by the L-shaped slide plate 822, and the second slide column 833 is constrained by the third slide groove 821, the sliding table 83 converts the rotation into a linear sliding along the third slide groove 821. The four sliding tables 83 slide and move closer, driving the side of the first stamping block 837 thereon to clamp and position the shell from four sides, thereby achieving clamping and fixing of shells of different sizes; the control system turns on the second electric telescopic rod 841 according to the length of the pin that needs to be retained, and the second electric telescopic rod 841 drives the second stamping block 842 to slide, so that the punching groove 8423 on the second stamping block 842 slides to the position where the pin needs to be cut, thereby achieving the function of adjusting the cutting position according to the requirements of different cutting lengths of the pin.

[0051] The control system records the number of revolutions of the second drive motor, and then turns on the first drive motor so that the first drive motor drives the first toothed disc 51 to rotate through the first gear, and the first toothed disc 51 drives the adjusting slider 56 to slide and approach along the second slide groove 522 on the adjusting tray 52, and the adjusting slider 56 drives the cutter head 53 to slide. The control system rotates the first drive motor a corresponding number of revolutions according to the number of revolutions of the second drive motor, so that the position of the cutter head 53 corresponds to the punching groove 8423. The control system turns on the first electric telescopic rod 10, and the first electric telescopic rod 10 drives the punching assembly 5 to descend. The cutter head 53 cooperates with the groove wall of the punching groove 8423 to cut off the excess part of the pin, and the cut pin slides from the inclined guide ramp 832 to the waste groove 831, thereby realizing the punching of the pin and the collection of waste.

[0052] After the pin is punched, the control system controls the first electric telescopic rod 10 to retract, and at the same time, the second suction cup assembly 6 is turned on. The second suction cup assembly 6 descends and absorbs the punched shell. After the absorption is completed, it further descends, and the second suction cup assembly 6 drives the shell to be pressed down. The compressed pin begins to curl up under the action of the first stamping block 837 and the stamping groove 8371, and gradually changes from a horizontal state to a vertical state. The pin is embedded in the stamping groove 8371. When the bottom of the shell contacts the support plate 836, the second suction cup assembly 6 stops descending. At this time, the top of the shell is flush with the top of the first stamping block 837, realizing the first stamping of the pin. Then the control system turns on the second electric telescopic rod 10, and the second suction cup assembly 6 is turned on. The second electric telescopic rod 841 drives the second stamping block 842 to slide along the first slide rail 835. Since the bottom end of the stamping plate 8424 is higher than the top end of the first stamping block 837, the stamping plate 8424 will slide over the top end of the first stamping block 837 and exert pressure on the vertical pins. The vertical pins bend toward the top surface of the DFN shell and become horizontal again. At this time, the pins fit with the top surface of the shell, thereby completing the secondary stamping of the pins; the control system controls the stamping assembly 84 to reset, and then uses the second suction cup assembly 6 and the turntable 2 to place the finished DFN shell on the transmission device 1, and repeats this cycle to achieve batch stamping of DFN shells.

[0053] When the stamping assembly 84 may be worn out due to long-term use, the control system starts the monitoring motor 851, and the monitoring motor 851 drives the screw rod 852 to rotate, and the rotation of the screw rod 852 drives the sliding support 853 to rotate. Since the sliding support 853 can only slide along the second slide rail 839, the sliding support 853 converts the rotation into sliding on the second slide rail 839, and the sliding support 853 drives the friction block 8541 on the monitor 854 to slide, and the friction block 8541 and the bottom end of the stamping plate 8424 produce friction. Under the action of the friction force, the friction block 8541 drives the sliding measuring block 8549 and the monitoring housing 8542 to produce relative displacement, and the protrusions 8540 on both sides of the sliding measuring block 8549 squeeze the spring sheet 8544, and the spherical contact 8545 on the spring sheet 8544 squeezes the piezoelectric element 8547 in the diaphragm 8546. The piezoelectric element 8547 is compressed to generate an electric charge, and the charge is transmitted to the control system through the wire. The control system analyzes the wear of the bottom of the stamping plate 8424 according to the difference in the received electrical signal changes. When the stamping plate 8424 is worn, the thickness of the worn part is reduced, and the contact area with the friction block 8541 is reduced, thereby reducing the friction force. The smaller the friction force, the smaller the relative displacement of the sliding measuring block 8549. Since the spring sheets 8544 form an angle with each other, the smaller the relative displacement of the sliding measuring block 8549, the smaller the squeezing force on the spring sheet 8544, and the smaller the curvature of the spring sheet 8544, the electrical signal generated by the piezoelectric element 8547 becomes weaker, thereby causing a whole set of electrical signal curves to fluctuate. The control system compares the difference in fluctuations with the standard. When the fluctuation value is higher than the standard value, it proves that the wear is serious and the stamping plate 8424 needs to be repaired or replaced, thereby realizing the monitoring of the wear of the stamping plate 8424 to prevent insufficient stamping or scratches on the pins due to wear.

[0054] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A DFN shell stamping and forming device with the function of preventing overflow, characterized in that: The stamping forming equipment comprises a base (7), a turntable (2) and a transmission device (1); a stamping device (8) is installed on the base (7); a second driving component (11) is installed in the base (7); the second driving component (11) is meshed with the stamping device (8) for transmission; the transmission device (1) is arranged on one side of the base (7); the turntable (2) is arranged between the base (7) and the transmission device (1); a rotating base plate (9) is installed on the turntable (2); and a rotating base plate (9) is installed at one end. A first suction cup assembly (3); a second suction cup assembly (6) and a first electric telescopic rod (10) are respectively mounted on the other end of the rotating base plate (9); a punching assembly (5) is mounted on the output shaft of the first electric telescopic rod (10); a first driving assembly (4) is mounted on the rotating base plate (9); the first driving assembly (4) is meshed with the punching assembly (5) for transmission; the punching device (8) comprises a sliding table (83); a punching assembly (84) and a wear monitoring assembly (85) are respectively mounted on the sliding table (83).

2. The DFN housing stamping and forming equipment with anti-overflow function according to claim 1 is characterized in that: The sliding platform (83) is provided with a support plate (836), the sliding platform (83) is provided with a sliding channel (8361), the sliding channel (8361) passes through the support plate (836), the sliding platform (83) is provided with a first punching block (837), the first punching block (837) is provided with a punching groove (8371), and the bottom end of the sliding platform (83) is provided with a second sliding column (833).

3. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 2 is characterized in that: The punching device (8) further comprises a bottom tray (82), the bottom tray (82) being mounted on the base (7), the bottom tray (82) being provided with a third slide groove (821), a second toothed disc (81) being rotatably mounted on the bottom end of the bottom tray (82), the second toothed disc (81) being provided with a second curved groove (811), an L-shaped slide groove plate (822) being provided on the bottom tray (82), the sliding platform (83) being mounted between the L-shaped slide groove plates (822), the second slide column (833) being slidably connected to the third slide groove (821) and the second curved groove (811) respectively; the second driving assembly (11) comprising a second driving motor, the second driving motor being mounted in the base (7), a second gear being mounted on the output shaft of the second driving motor, the second gear being meshed with the second toothed disc (81) for transmission.

4. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 3 is characterized in that: The sliding table (83) is also provided with a first sliding rail (835) and a second sliding rail (839), the sliding table (83) is respectively provided with a first connecting member (838) and a second connecting member (8310), the sliding table (83) is provided with a waste trough (831), the sliding table (83) is provided with an inclined guide ramp (832), the sliding table (83) is provided with a bracket (834), a stamping assembly (84) is installed on the bracket (834), and a wear monitoring assembly (85) is installed between the first connecting member (838) and the second connecting member (8310).

5. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 4 is characterized in that: The stamping assembly (84) includes a second electric telescopic rod (841), the second electric telescopic rod (841) is installed on the bracket (834), a second stamping block (842) is installed on the output shaft of the second electric telescopic rod (841), a positioning column (843) is installed on the second stamping block (842), and the positioning column (843) is slidably installed in the sliding channel (8361); the second stamping block (842) is provided with a groove (8422), the second stamping block (842) is provided with a stamping plate (8424) and a punching groove (8423), the second stamping block (842) is provided with a fourth slide groove (8421), and the second stamping block (842) is installed on the first slide rail (835) through the fourth slide groove (8421).

6. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 4 is characterized in that: The wear monitoring component (85) includes a monitoring motor (851), which is mounted on the second connecting member (8310). The output shaft of the monitoring motor (851) passes through the second connecting member (8310) and is installed with a screw rod (852). The screw rod (852) is rotatably mounted on the first connecting member (838) and the second connecting member (8310). The screw rod (852) is provided with a thread, and a sliding support (853) is threadedly mounted on the screw rod (852). The sliding support (853) is slidably connected to the sliding platform (83) through a second sliding rail (839), and a monitor (854) is installed on the sliding support (853).

7. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 6 is characterized in that: The monitor (854) comprises a monitoring housing (8542), a fixing block (8543) is installed in the monitoring housing (8542), spring sheets (8544) are symmetrically installed on the fixing block (8543), the spring sheets (8544) are at an angle to each other, spherical contacts (8545) are installed on the spring sheets (8544), a diaphragm (8546) is installed on the monitoring housing (8542), and a contact (8546) is installed between the diaphragms (8546). A piezoelectric element (8547) is provided, a sliding measuring block (8549) is slidably installed in the monitoring housing (8542), a friction block (8541) is installed on the sliding measuring block (8549), the surface of the friction block (8541) is made of a material with a high friction coefficient, protrusions (8540) are symmetrically installed on both sides of the sliding measuring block (8549), and a reset spring (8548) is installed between the sliding measuring block (8549) and the monitoring housing (8542).

8. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 1 is characterized in that: The punching assembly (5) comprises an adjusting tray (52), the adjusting tray (52) being mounted on a first electric telescopic rod (10), a first toothed disc (51) being rotatably mounted on the adjusting tray (52), an adjusting slider (56) being slidably mounted on the adjusting tray (52), the adjusting slider (56) being slidably connected to the first toothed disc (51), a cutter head (53) being mounted on the adjusting slider (56), a spring telescopic rod (54) being mounted on the adjusting slider (56), and a fixed pressing plate (55) being mounted at the bottom end of the spring telescopic rod (54).

9. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 8 is characterized in that: The first drive assembly (4) comprises a first drive motor, the first drive motor is installed in the base (7), a first gear is installed on the output shaft of the first drive motor, and the first gear is meshed with a first gear plate (51) for transmission.

10. The DFN housing stamping and forming equipment with the function of preventing overflow according to claim 9, characterized in that: The first toothed disc (51) is provided with a first curved groove (511), the adjusting tray (52) is provided with a first sliding groove (521) and a second sliding groove (522), the adjusting slider (56) is provided with a sliding block (561) and a first sliding column (562), the sliding block (561) is slidably installed in the first sliding groove (521), and the first sliding column (562) is slidably connected to the second sliding groove (522) and the first curved groove (511) respectively.

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