Automated production line for LED lead frame

Abstract

An automated production line for an LED lead frame, comprising a mounting base (4), a cutting unit, an electroplating unit, an injection molding unit, a stamping unit (2) arranged on the upper surface of the mounting base, a flattening mechanism (1) for flattening a raw material before stamping, and a protection mechanism (3) for protecting a stamped product. By means of the arrangement of the protection mechanism, the stamped product can be flattened. When the stamping is completed, a plurality of holes and fragile connecting portions are formed in the stamped product, and during stamping, the raw material is slightly moved from left to right upon finishing one stamping, and therefore, during movement, some of the connecting portions of the stamped product warp; by flattening the stamped product and coating the lower surface of the stamped product with a film, the warping of the connecting portions in the stamped product can be effectively prevented, thereby avoiding affecting subsequent use.

Description

An automated production line for LED brackets Technical Field

[0001] This invention relates to the field of LED bracket manufacturing technology, specifically to an automated production line for LED brackets. Background Technology

[0002] The LED bracket is the base for LED beads before encapsulation. On the basis of the LED bracket, the chip is fixed into the LED bead, the positive and negative electrodes are soldered on, and then the LED bead is encapsulated in one step with encapsulating glue. During the LED bead encapsulation process, several LED brackets are connected together and then disconnected after the encapsulation is completed. During the production process, the LED bracket needs to be stamped, cut, electroplated and injection molded in sequence.

[0003] In the process of producing LED brackets, the stamping step requires the use of stamping equipment to stamp the raw materials and stamp out the entire frame of the LED. Then, the stamped product is cut into the required length according to the needs, and then electroplating and injection molding are carried out.

[0004] However, when existing stamping equipment performs stamping work, the finished product has many thin connecting segments. Since the stamping work is progressive, the raw material is moved once after each stamping, and the stamping position also moves synchronously. Frequent movement can cause some connecting segments at the stamping position to bend, which will affect subsequent use. Summary of the Invention

[0005] This invention provides an automated production line for LED brackets, which solves the technical problem that the thin connecting section at the stamping position of the LED is prone to bending during the movement of the stamped finished product.

[0006] The present invention provides an automated production line for LED brackets, including a mounting base, a cutting unit, an electroplating unit and an injection molding unit, wherein the upper surface of the mounting base is provided with a stamping unit for stamping.

[0007] A leveling mechanism is used to flatten raw materials before stamping. The leveling mechanism is fixedly installed on the left side of the stamping unit.

[0008] A protective mechanism for protecting stamped finished products is fixedly installed on the right side of the stamping unit.

[0009] The protective mechanism includes two connecting brackets fixedly connected to the right side of the stamping unit, one in front of the other. The lower surfaces of the two connecting brackets are fixedly connected to a fixed shell. The fixed shell has through slots on both the left and right sides. An auxiliary entry arc plate is fixedly connected to the left side of the fixed shell at the position corresponding to the through slot. A film covering is fixedly installed on the lower surface of the fixed shell. A flattening member is installed on the left side of the interior of the fixed shell. A cleaning member is installed on the right side of the interior of the fixed shell.

[0010] According to an embodiment of the present invention, the coating component includes a fixed box fixedly connected to the lower surface of a fixed shell, a connecting roller rotatably connected to the front and rear of the fixed box, a guide roller rotatably connected to the front and rear of the fixed shell and located above the connecting roller, a supporting conveyor belt rotatably connected to the inside of the fixed shell and located above the guide roller, and a protective film is provided on the connecting roller.

[0011] According to an embodiment of the present invention, the flattening component includes two front-to-back symmetrical second mounting brackets fixedly connected to the bottom end of the inner surface of the fixed shell, a second flattening conveyor belt rotatably connected between the opposite surfaces of the two second mounting brackets, and two front-to-back symmetrical first electric push rods fixedly connected to the top end of the inner surface of the fixed shell, a first mounting bracket fixedly connected to the bottom end of the first electric push rods, and a first flattening conveyor belt rotatably connected between the opposite surfaces of the two first mounting brackets.

[0012] According to an embodiment of the present invention, the cleaning component includes two symmetrically arranged second electric push rods fixedly connected to the top of the inner surface of the fixed housing. The bottom ends of the two second electric push rods are fixedly connected to a brush. An absorption chamber is fixedly connected inside the fixed housing and below the brush. An auxiliary cleaning platform is fixedly connected to the upper surface of the absorption chamber. A suction machine is fixedly connected to the bottom of the inner surface of the fixed housing and below the absorption chamber. The suction machine is connected to the absorption chamber through a connecting hose.

[0013] According to an embodiment of the present invention, the leveling mechanism includes a support plate fixedly connected to the left side of the stamping unit, a leveling component is provided on the left side of the upper surface of the support plate, an auxiliary conveyor belt is rotatably connected at the middle position of the upper surface of the support plate, and a limiting component is provided on the right side of the upper surface of the support plate.

[0014] According to an embodiment of the present invention, the leveling component includes two symmetrical auxiliary rollers fixedly connected to a support plate. A mounting plate is fixedly connected to the front and rear surfaces of the support plate, between the two auxiliary rollers. A through-slot is formed on the mounting plate, and a connecting slider is slidably connected inside the through-slot. A leveling roller is rotatably connected between the opposing surfaces of the two connecting sliders. A limiting post is fixedly connected to the upper surface of the connecting slider. A first connecting spring is provided on the circumferential surface of the limiting post, between the upper surface of the connecting slider and the inner surface of the through-slot at the upper end of the mounting plate. The top end of the limiting post penetrates the upper surface of the mounting plate, and a limiting locking pin is engaged near the top end on the circumferential surface of the limiting post.

[0015] According to an embodiment of the present invention, the stamping unit is provided with an output shaft for driving the stamping, the limiting member includes a Y-shaped connecting frame fixedly connected to the output shaft of the stamping unit, connecting columns are slidably connected to the two inclined sections of the Y-shaped connecting frame, a second connecting spring is provided between the connecting columns and the Y-shaped connecting frame, a pressing block is fixedly connected to the bottom ends of the two connecting columns, and a support base is fixedly connected to the upper surface of the support plate and directly below the pressing block.

[0016] The technical solution of this invention is as follows: 1. The protective mechanism can be used to level the stamped product. After the stamped product is stamped, it will have many holes and many fine connection positions. During the stamping process, the raw material moves from left to right after each stamping. During the movement, some connection positions on the stamped product will be bent. By leveling the stamped product and covering the lower surface with a film, the bending of the connection positions on the stamped product can be avoided, thus avoiding affecting subsequent use.

[0017] 2. The flattening mechanism can flatten the raw material before stamping. Due to the coiled state of the raw material, the bending of the raw material itself can be avoided during the stamping process, thus reducing the defect rate and saving raw materials. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 is a three-dimensional structural diagram of the automated LED bracket production line provided by the present invention.

[0020] Figure 2 is a front view of the automated LED bracket production line provided by the present invention.

[0021] Figure 3 is a schematic diagram of the flattening mechanism provided by the present invention.

[0022] Figure 4 is an enlarged view of part A in Figure 3 of this invention.

[0023] Figure 5 is a front sectional view of the protection mechanism provided by the present invention.

[0024] Figure 6 is an enlarged view of part B in Figure 5 of this invention.

[0025] Figure 7 is an enlarged view of part C in Figure 5 of this invention.

[0026] Figure 8 is a schematic diagram of the stamped finished product in this invention.

[0027] Figure label:

[0028] 1. Leveling mechanism; 2. Stamping unit; 3. Protection mechanism; 4. Mounting base; 11. Leveling component; 12. Support plate; 13. Auxiliary conveyor belt; 14. Limiting component; 31. Auxiliary entry arc plate; 32. Connecting bracket; 33. Fixing shell; 34. Coating component; 35. Flattening component; 36. Cleaning component; 111. Limiting post; 112. Fixed mounting plate; 113. Limiting lock pin; 114. Connecting slider; 115. Auxiliary roller; 116. Leveling roller; 141. Y-shaped connecting frame; 42. Support base; 143. Clamping block; 144. Connecting column; 341. Fixing box; 342. Connecting roller; 343. Protective film; 344. Guide roller; 345. Supporting conveyor belt; 351. First electric push rod; 352. First mounting bracket; 353. First leveling conveyor belt; 354. Second leveling conveyor belt; 355. Second mounting bracket; 361. Second electric push rod; 362. Brush; 363. Auxiliary cleaning table; 364. Absorption chamber; 365. Suction machine. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] As shown in Figures 1 and 8, an automated production line for LED brackets includes a mounting base 4, a cutting unit, an electroplating unit, and an injection molding unit. The upper surface of the mounting base 4 is provided with a stamping unit 2 for stamping.

[0031] A leveling mechanism 1 is used to flatten the raw material before stamping. The leveling mechanism 1 is fixedly installed on the left side of the stamping unit 2.

[0032] The protective mechanism 3 is used to protect the stamped finished product. The protective mechanism 3 is fixedly installed on the right side of the stamping unit 2.

[0033] As shown in Figure 3, the leveling mechanism 1 includes a support plate 12 fixedly connected to the left side of the stamping unit 2. A leveling component 11 is provided on the left side of the upper surface of the support plate 12. An auxiliary conveyor belt 13 is rotatably connected to the middle position of the upper surface of the support plate 12. A limiting component 14 is provided on the right side of the upper surface of the support plate 12.

[0034] As shown in Figure 4, the leveling component 11 includes two symmetrical auxiliary rollers 115 fixedly connected to the support plate 12. A fixed mounting plate 112 is fixedly connected to the front and rear surfaces of the support plate 12 and between the two auxiliary rollers 115. A through groove is opened on the fixed mounting plate 112, and a connecting slider 114 is slidably connected inside the through groove. A leveling roller 116 is rotatably connected between the opposite surfaces of the two connecting sliders 114. A limiting post 111 is fixedly connected to the upper surface of the connecting slider 114. A first connecting spring is provided on the circumferential surface of the limiting post 111 and between the upper surface of the connecting slider 114 and the inner surface of the through groove at the upper end of the fixed mounting plate 112. The top end of the limiting post 111 penetrates the upper surface of the fixed mounting plate 112. A limiting locking pin 113 is engaged near the top end on the circumferential surface of the limiting post 111. An external servo motor drives the auxiliary rollers 115 to rotate intermittently.

[0035] In practical use, firstly, adjust the distance between the leveling roller 116 and the two auxiliary rollers 115 according to the thickness of the raw material. Then, remove the limiting locking pin 113 on the limiting post 111 from limiting the limiting post 111. Next, adjust the position of the leveling roller 116 by sliding the connecting slider 114 in the through groove on the fixed mounting plate 112. After adjustment, limit the limiting post 111 again by the limiting locking pin 113. Then, pass the raw material between the auxiliary rollers 115 and the leveling roller 116. The external motor drives the auxiliary roller 115 to rotate, so that the raw material gradually passes between the auxiliary rollers 115 and the leveling roller 116. At the same time, the connecting slider 114 can slide upward in the through groove on the fixed mounting plate 112. With the elastic force of the first connecting spring, a certain buffer distance can be ensured between the leveling roller 116 and the auxiliary rollers 115 during the process of leveling the raw material, so as to avoid jamming and protect the raw material from damage.

[0036] As shown in Figure 3, the stamping unit 2 is provided with an output shaft for driving the stamping. The limiting member 14 includes a Y-shaped connecting frame 141 fixedly connected to the output shaft of the stamping unit 2. Connecting columns 144 are slidably connected to the two inclined sections of the Y-shaped connecting frame 141. A second connecting spring is provided between the connecting columns 144 and the Y-shaped connecting frame 141. A pressing block 143 is fixedly connected to the bottom ends of the two connecting columns 144. A support base 142 is fixedly connected to the upper surface of the support plate 12 and directly below the pressing block 143.

[0037] The flattening mechanism 1 can flatten the raw material before stamping. Due to the coiled state of the raw material, the accuracy of the raw material during the stamping process is avoided due to its own curvature, thus reducing the defect rate and saving raw materials.

[0038] In practical use, the raw material, after being flattened by the leveling roller 116 and the auxiliary roller 115, passes over the auxiliary conveyor belt 13 and passes between the support base 142 and the pressing block 143, entering the inner side of the stamping unit 2 to begin stamping. During the stamping process, as the stamping unit 2 stamps sequentially, the output shaft on the stamping unit 2 drives the pressing block 143 at the bottom of the connecting column 144 to move synchronously through the Y-shaped connecting frame 141. When the stamping unit 2 is stamping, the pressing block 143 and the support base 142 can limit the stamping material, keeping the material taut during stamping, thereby improving the stamping effect of the stamping unit 2 and preventing bending of the stamping position due to loose material during the stamping process.

[0039] As shown in Figures 2 and 5, the protection mechanism 3 includes two connecting brackets 32 fixedly connected to the right side of the stamping unit 2, which are arranged front and rear. The lower surfaces of the two connecting brackets 32 are fixedly connected to a fixed shell 33. The left and right sides of the fixed shell 33 are provided with through slots. An auxiliary entry arc plate 31 is fixedly connected to the left side of the fixed shell 33 at the corresponding position of the through slot. A film covering part 34 is fixedly provided on the lower surface of the fixed shell 33. A flattening part 35 is provided on the left side of the interior of the fixed shell 33. A cleaning part 36 is provided on the right side of the flattening part 35 inside the fixed shell 33.

[0040] As shown in Figure 6, the flattening component 35 includes two front-to-back symmetrical second mounting brackets 355 fixedly connected to the bottom end of the inner surface of the fixed housing 33. A second flattening conveyor belt 354 is rotatably connected between the opposite surfaces of the two second mounting brackets 355. Two front-to-back symmetrical first electric push rods 351 are fixedly connected to the top end of the inner surface of the fixed housing 33. A first mounting bracket 352 is fixedly connected to the bottom end of the first electric push rod 351. A first flattening conveyor belt 353 is rotatably connected between the opposite surfaces of the two first mounting brackets 352. An external motor drives the first flattening conveyor belt 353 to rotate.

[0041] In practical use, after the stamping is completed, the stamped product enters the interior of the fixed housing 33 through the auxiliary entry arc plate 31 on the left side of the fixed housing 33 between the first flat conveyor belt 353 and the second flat conveyor belt 354. At this time, the first electric push rod 351 pushes the first mounting bracket 352 to move downward, so that the first flat conveyor belt 353 fits against the upper surface of the stamped product, and works with the second flat conveyor belt 354 to flatten the stamped product, so that all the connection positions of the stamped product are on the same horizontal plane. At the same time, the external drive motor drives the first flat conveyor belt 353 to rotate intermittently, and works with the stamping of the stamping unit 2 to move the stamped product intermittently.

[0042] As shown in Figure 7, the cleaning component 36 includes two symmetrically arranged second electric push rods 361 fixedly connected to the top of the inner surface of the fixed housing 33. The bottom ends of the two second electric push rods 361 are fixedly connected to a brush 362. An absorption chamber 364 is fixedly connected inside the fixed housing 33 and below the brush 362. An auxiliary cleaning platform 363 is fixedly connected to the upper surface of the absorption chamber 364. A suction machine 365 is fixedly connected to the bottom of the inner surface of the fixed housing 33 and below the absorption chamber 364. The suction machine 365 is connected to the absorption chamber 364 through a connecting hose.

[0043] In practical use, after the stamped product is flattened by the first flat conveyor belt 353, it enters between the brush 362 and the auxiliary cleaning table 363. At this time, the second electric push rod 361, in coordination with the stamping frequency of the stamping unit 2, drives the brush 362 to move up and down. When the brush 362 approaches the stamped product, the bristles on it clean the debris adhering to various positions on the stamped product. At the same time, the suction machine 365 generates suction force to suck the debris cleaned by the brush 362 through the auxiliary cleaning table 363 into the inside of the absorption chamber 364, and then into the inside of the suction machine 365 through the connecting hose, so as to avoid the debris affecting the subsequent processing of the stamped product.

[0044] As shown in Figure 5, the coating component 34 includes a fixed box 341 fixedly connected to the lower surface of the fixed shell 33. A connecting roller 342 is rotatably connected to the front and rear of the fixed box 341. A guide roller 344 is rotatably connected to the front and rear of the fixed shell 33 and located above the connecting roller 342. A support conveyor belt 345 is rotatably connected to the inside of the fixed shell 33 and located above the guide roller 344. A protective film 343 is provided on the connecting roller 342. The end of the protective film 343 away from the connecting roller 342 is attached to the upper surface of the support conveyor belt 345 through the guide roller 344.

[0045] The protective mechanism 3 can be used to level the stamped product. After the stamped product is stamped, it will have many holes and many fine connection points. During the stamping process, the raw material moves from left to right after each stamping. During the movement, some connection points on the stamped product will bend. By leveling the stamped product and covering the lower surface with a film, the bending of the connection points on the stamped product can be avoided, thus preventing it from affecting subsequent use.

[0046] In practical use, after the cleaned stamped product moves above the support conveyor belt 345, as the stamped product continues to move, the protective film 343 is covered on the lower surface of the stamped product with the assistance of the connecting roller 342 and the guide roller 344. Then, the stamped product passes through the right side of the fixed shell 33 and is then cut, electroplated and injection molded in sequence. The film covering the lower surface of the stamped product can prevent adjacent stamped products from getting stuck together when they are stacked after being cut.

[0047] Working principle: In actual use, the operator first adjusts the leveling mechanism 1 according to the thickness of the stamping material, and then the material passes through the leveling part 11, and then passes through the auxiliary conveyor belt 13 and the limiting part 14 to the inside of the stamping unit 2 for stamping. During the stamping process, the limiting part 14 limits the material before each stamping to improve the stamping accuracy. After the stamping is completed, the finished product passes through the auxiliary entry arc plate 31 and enters the interior of the fixed shell 33. After the stamped finished product enters the interior of the fixed shell 33, it first passes through the flattening part 35. The flattening part 35 can flatten the stamped finished product. After the stamped finished product is flattened, the cleaning part 36 cleans the debris adhering to the stamped finished product. After the debris is cleaned, the lower surface of the stamped finished product is coated to protect the stamped finished product. Then the stamped finished product is cut, electroplated and injection molded in sequence.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automated production line for LED brackets, characterized in that: It includes a mounting base (4), a cutting unit, an electroplating unit and an injection molding unit, wherein the upper surface of the mounting base (4) is provided with a stamping unit (2) for stamping. A leveling mechanism (1) is used to flatten the raw material before stamping. The leveling mechanism (1) is fixedly provided on the right side of the stamping unit (2). The protective mechanism (3) is used to protect the stamped finished product. The protective mechanism (3) is fixedly provided on the right side of the stamping unit (2). The protective mechanism (3) includes two connecting brackets (32) fixedly connected to the right side of the stamping unit (2) and arranged in front and behind. The lower surfaces of the two connecting brackets (32) are fixedly connected to a fixed shell (33). The left and right sides of the fixed shell (33) are provided with through slots. An auxiliary entry arc plate (31) is fixedly connected to the left side of the fixed shell (33) at the position corresponding to the through slot. A film covering part (34) is fixedly provided on the lower surface of the fixed shell (33). A flattening part (35) is provided on the left side inside the fixed shell (33). A cleaning part (36) is provided on the right side inside the fixed shell (33) at the flattening part (35).

2. The automated production line for LED brackets according to claim 1, characterized in that: The coating component (34) includes a fixed box (341) fixedly connected to the lower surface of the fixed shell (33). A connecting roller (342) is rotatably connected to the front and rear of the fixed box (341). A guide roller (344) is rotatably connected to the front and rear of the fixed shell (33) and above the connecting roller (342). A support conveyor belt (345) is rotatably connected to the inside of the fixed shell (33) and above the guide roller (344). A protective film (343) is provided on the connecting roller (342).

3. The automated production line for LED brackets according to claim 1, characterized in that: The flattening component (35) includes two front-to-back symmetrical second mounting brackets (355) fixedly connected to the bottom end of the inner surface of the fixed shell (33). A second flattening conveyor belt (354) is rotatably connected between the opposite surfaces of the two second mounting brackets (355). Two front-to-back symmetrical first electric push rods (351) are fixedly connected to the top end of the inner surface of the fixed shell (33). A first mounting bracket (352) is fixedly connected to the bottom end of the first electric push rod (351). A first flattening conveyor belt (353) is rotatably connected between the opposite surfaces of the two first mounting brackets (352).

4. The automated production line for LED brackets according to claim 1, characterized in that: The cleaning component (36) includes two symmetrical second electric push rods (361) fixedly connected to the top of the inner surface of the fixed shell (33). The bottom ends of the two second electric push rods (361) are fixedly connected to a brush (362). An absorption chamber (364) is fixedly connected inside the fixed shell (33) and below the brush (362). An auxiliary cleaning platform (363) is fixedly connected to the upper surface of the absorption chamber (364). A suction machine (365) is fixedly connected to the bottom of the inner surface of the fixed shell (33) and below the absorption chamber (364). The suction machine (365) is connected to the absorption chamber (364) through a connecting hose.

5. An automated production line for LED brackets according to claim 1, characterized in that: The leveling mechanism (1) includes a support plate (12) fixedly connected to the left side of the stamping unit (2). A leveling component (11) is provided on the left side of the upper surface of the support plate (12). An auxiliary conveyor belt (13) is rotatably connected at the middle position of the upper surface of the support plate (12). A limiting component (14) is provided on the right side of the upper surface of the support plate (12).

6. An automated production line for LED brackets according to claim 5, characterized in that: The leveling component (11) includes two symmetrical auxiliary rollers (115) fixedly connected to the support plate (12). A fixed mounting plate (112) is fixedly connected to the front and rear surfaces of the support plate (12) and between the two auxiliary rollers (115). A through groove is opened on the fixed mounting plate (112) and a connecting slider (114) is slidably connected inside the through groove. A leveling roller (116) is rotatably connected between the opposite surfaces of the two connecting sliders (114). A limiting post (111) is fixedly connected to the upper surface of the connecting slider (114). A first connecting spring is provided on the circumferential surface of the limiting post (111) between the upper surface of the connecting slider (114) and the inner surface of the through groove at the upper end of the fixed mounting plate (112). The top end of the limiting post (111) penetrates the upper surface of the fixed mounting plate (112). A limiting locking pin (113) is engaged near the top end on the circumferential surface of the limiting post (111).

7. An automated production line for LED brackets according to claim 5, characterized in that: The stamping unit (2) is provided with an output shaft for driving the stamping. The limiting member (14) includes a Y-shaped connecting frame (141) fixedly connected to the output shaft of the stamping unit (2). Connecting columns (144) are slidably connected to the two inclined sections of the Y-shaped connecting frame (141). A second connecting spring is provided between the connecting column (144) and the Y-shaped connecting frame (141). A pressing block (143) is fixedly connected to the bottom ends of the two connecting columns (144). A support base (142) is fixedly connected to the upper surface of the support plate (12) and directly below the pressing block (143).

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