Die-casting punching machine and die-casting burr cutting process for card reader shell

Abstract

The invention relates to the technical field of casting post-processing, and discloses a die-casting punching machine and a die-casting burr cutting process for a card reader shell, the die-casting punching machine comprises a main body, a movable seat and a fixed seat, the movable seat and the fixed seat are mounted on the main body, an upper die and a cutter are arranged at the bottom of the movable seat, and the upper die is mounted at the bottom of the movable seat through a telescopic assembly; and the upper mold is used for fixing a casting. According to the die, the upper die and the cutter are arranged in a split mode, the lower die is provided with the supporting block, the driving mechanism and the grinder, a casting is locally cut through the cutter in the punching work, so that part of sprue waste is reserved around a product, deformation generated in the cutting process is generated on the sprue waste, and the product quality is improved. And then, the part of sprue waste is further ground through the driving mechanism and the grinder, so that the deformation phenomenon of a product on a casting in the punching process can be greatly reduced, and the machining quality of the product is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of post-treatment of castings, and specifically to a die-casting punching machine and a die-casting burr cutting process for a card reader housing. Background Art

[0002] The subsequent treatment of high-strength and tough aluminum alloy die-castings includes trimming and shearing of the edges or gates of the castings, heat treatment of the castings, and finishing of the surfaces of the castings. Among them, for the shearing of the gates, die-casting punching equipment is generally used. The principle is to place the casting on the lower die for positioning, and the hydraulic cylinder drives the upper die to move down. The cutting knife on the upper die shears the gate waste on the die-casting, and the product body is retained. However, there are certain problems in actual applications: different casting materials will produce different effects during die-casting punching. For high-toughness aluminum alloy casting materials, a relatively large punching force is required during punching. At this time, the cutting point of the workpiece rebounds due to elastic deformation. Secondly, the high-toughness material converts the absorbed energy into heat during the punching process, which easily causes deformation of the punching part. The above two situations both affect the accuracy of the product edge and lead to a reduction in product quality. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a die-casting punching machine and a die-casting burr cutting process for a card reader housing, which have the advantages of higher punching quality, etc., and solve the problem that the punching edges of existing high-toughness workpieces are prone to deformation due to rebound and heat during use.

[0004] To solve the above technical problems, the present invention provides the following technical solution: A die-casting punching machine includes a main body, a movable seat and a fixed seat installed on the main body. The bottom of the movable seat is provided with an upper die and a cutting knife. The upper die is installed at the bottom of the movable seat through a telescopic component, and the upper die is used to fix the casting. The cutting knife is installed at the bottom of the movable seat through an adjusting component. The cutting knife is used to cut the gate part of the casting, and a gap is provided between the cutting knife and the upper die. The top of the fixed seat is fixed with a lower die, which is used to position the casting. A support block and a grinding device are installed on the side of the lower die. The edge of the support block is located directly below the cutting knife. The support block is used to support the gate part of the casting, and the grinding device is used to grind the cutting part. A driving mechanism is also installed inside the lower die, and the driving mechanism is used to drive the support block and the grinding device to move. When the main body operates, it forces the upper die and the cutting knife to move down. The upper die first fixes the casting, and then the cutting knife cuts along the edge of the support block, forcing some gate waste to be retained at the product edge. Then the driving mechanism operates, causing the support block to move away from the bottom of the retained gate waste, and also forcing the grinding device to move to the edge of the gate waste. The grinding device operates to grind the gate waste.

[0005] Preferably, the telescopic assembly includes a guide rod fixed to the top of the upper die. The guide rod is movably inserted into the movable seat. A vertical spring is sleeved outside the guide rod, and two ends of the vertical spring are respectively fixedly connected to the upper die and the movable seat.

[0006] Preferably, mounting grooves and transverse chutes with the same direction are formed in the side surface of the lower die. The transverse chute is located at the bottom of the mounting groove and communicates with the mounting groove. One end of the support block extends into the mounting groove and is horizontally slidably connected to the mounting groove. A screw hole is formed at one end of the support block close to the inside of the mounting groove.

[0007] Preferably, the driving mechanism includes a driving motor fixed inside the mounting groove. A driving screw is fixed to the output shaft of the driving motor. A bearing seat is mounted on the driving screw, and the bearing seat is fixed to the inner wall of the mounting groove. One end of the driving screw is in threaded connection with the screw hole. The driving mechanism further includes a transverse slider which is slidably connected to the transverse chute. A transverse spring is fixedly connected between one end of the transverse slider and the end of the transverse chute. The other end of the transverse slider extends outside the transverse chute. A bracket is hinged to the end of the transverse slider outside the transverse chute. The grinding device is mounted at the end of the bracket. A connecting rod is hinged to the end of the support block, and the end of the connecting rod away from the support block is hinged to the bracket. A strip-shaped groove is formed at the top of the transverse slider. A convex block is fixedly connected to the bottom of the support block, and the convex block extends into the strip-shaped groove.

[0008] Preferably, the grinding device includes a slide rail fixed to the end of the bracket. An adjusting motor is fixed to the end of the slide rail. An adjusting screw is fixed to the output shaft of the adjusting motor. The adjusting screw is located inside the slide rail and is rotatably connected to both ends of the slide rail. A longitudinal slider is slidably connected inside the slide rail. The adjusting screw penetrates through the longitudinal slider and is in threaded connection with the longitudinal slider. An installation frame is fixed to one side of the longitudinal slider close to the support block. A grinding roller is rotatably connected to the inside of the installation frame. A driving motor is fixed to the end of the installation frame, and the output shaft of the driving motor is fixed to the end of the grinding roller.

[0009] Preferably, a transmission chute is provided on the bottom wall of the movable seat. The adjusting assembly is used to drive the cutting knife to move. The adjusting assembly includes a transmission slider slidably connected in the transmission chute. An adjusting bolt is further provided in the transmission chute. The adjusting bolt penetrates through the transmission slider and is in threaded connection with the transmission slider. Assembly plates are provided at both ends of the adjusting bolt. The assembly plates are fixed to the side wall of the movable seat and are rotatably connected to the adjusting bolt. A tool holder is fixed to the bottom of the transmission slider, and the cutting knife is fixed to the side of the tool holder close to the upper die.

[0010] Preferably, a cooling component is provided on the main body. The cooling component is used to cool the grinding part of the grinder. The cooling component includes a water tank fixed on the main body. A water pump is fixed inside the water tank. The output end of the water pump is fixed with an output pipe. One end of the output pipe penetrates to the outside of the water tank. The end of the output pipe outside the water tank is fixed on the tool rest. A branch pipe is fixed at the end of the output pipe, and a plurality of nozzles are fixed on the branch pipe.

[0011] Preferably, a blanking port is provided on the fixing seat. The blanking port is located around the lower die, and a hopper is also fixed at the bottom of the blanking port.

[0012] Preferably, a recovery pipe is connected between the bottom of the hopper and the water tank, and a filter is provided at the connection between the recovery pipe and the bottom of the hopper.

[0013] The present invention also discloses a die-casting burr cutting process for a card reader housing. This die-casting burr cutting process for a card reader housing uses the above-mentioned die-casting punching machine.

[0014] Compared with the prior art, the present invention provides a die-casting punching machine and a die-casting burr cutting process for a card reader housing, having the following beneficial effects: 1. For this die-casting punching machine and the die-casting burr cutting process for a card reader housing, by separately arranging the upper die and the cutting knife, and providing a support block, a driving mechanism and a grinder on the lower die, during the punching operation, the casting is locally cut by the cutting knife, so that part of the gate waste is retained around the product. Thus, the deformation generated during cutting occurs on this part of the gate waste. Then, the driving mechanism and the grinder are used to further grind this part of the gate waste. This method can greatly reduce the deformation phenomenon generated by the product on the casting during the punching process, thereby improving the processing quality of the product.

[0015] 2. For this die-casting punching machine and the die-casting burr cutting process for a card reader housing, by providing an adjusting component, it is beneficial to adjust the position of the cutting knife, and then adjust the area of the gate waste retained on the casting according to the different materials of the casting, improving the applicability.

[0016] 3. For this die-casting punching machine and the die-casting burr cutting process for a card reader housing, by providing a cooling component, a blanking port, a hopper, a filter and a recovery pipe, when grinding the casting, the cooling component operates to spray the coolant on the grinding part, which can not only cool the casting but also reduce dust and pollution. And the hopper and the filter can collect dust for unified treatment, while the recovery pipe can recover the coolant for repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic three-dimensional structure of a die-casting punching machine of the present inventionFigure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of a die-casting punching machine according to the present invention Figure 2 ; Figure 3 Cross-sectional view of a die-casting punching machine according to the present invention; Figure 4 According to the present invention Figure 3 Enlarged view of part A; Figure 5 Schematic diagram of the structure of the lower die according to the present invention; Figure 6 Schematic diagram of the structure of the upper die according to the present invention; Figure 7 Cross-sectional view of the lower die according to the present invention; Figure 8 According to the present invention Figure 7 Enlarged view of part B; Figure 9 Schematic diagram of the working state of the driving mechanism according to the present invention.

[0018] In the figure: 1, main body; 2, movable seat; 21, transmission chute; 3, fixed seat; 31, blanking port; 32, hopper; 33, recovery pipe; 34, filter; 4, upper die; 5, cutting knife; 6, telescopic assembly; 61, guide rod; 62, vertical spring; 7, adjustment assembly; 71, transmission slider; 72, adjustment bolt; 73, assembly plate; 74, tool rest; 8, lower die; 81, support block; 82, grinder; 821, slide rail; 822, adjustment motor; 823, adjustment screw; 824, longitudinal slider; 825, mounting bracket; 826, grinding roller; 827, transmission motor; 83, mounting groove; 84, transverse chute; 85, screw hole; 86, convex block; 9, driving mechanism; 91, driving motor; 92, driving screw; 93, bearing seat; 94, transverse slider; 95, transverse spring; 96, bracket; 97, connecting rod; 98, strip-shaped groove; 10, cooling assembly; 101, water tank; 102, water pump; 103, output pipe; 104, branch pipe; 105, nozzle. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes a die-casting punching machine and a die-casting burr cutting process for a card reader housing.

[0021] Embodiment 1: Please refer to Figures 1 - 6 , a die-casting punching machine, including a main body 1, a movable seat 2 and a fixed seat 3 installed on the main body 1. A top die 4 and a cutting knife 5 are provided at the bottom of the movable seat 2. The top die 4 is installed at the bottom of the movable seat 2 through a telescopic assembly 6, and the top die 4 is used for fixing the casting. The cutting knife 5 is installed at the bottom of the movable seat 2 through an adjustment assembly 7. The cutting knife 5 is used for cutting the gate part of the casting, and a gap is provided between the cutting knife 5 and the top die 4. A bottom die 8 is fixed to the top of the fixed seat 3. The bottom die 8 is used for positioning the casting. A support block 81 and a grinder 82 are installed on the side of the bottom die 8. The edge of the support block 81 is located directly below the cutting knife 5. The support block 81 is used for supporting the gate part of the casting. The grinder 82 is used for grinding the cutting part. A driving mechanism 9 is also installed inside the bottom die 8. The driving mechanism 9 is used for driving the support block 81 and the grinder 82 to move. When the main body 1 operates, it forces the top die 4 and the cutting knife 5 to move downward. The top die 4 first fixes the casting. Subsequently, the cutting knife 5 cuts along the edge of the support block 81, forcing some gate waste to be retained at the product edge. Then, the driving mechanism 9 operates, causing the support block 81 to move away from the bottom of the retained gate waste, and also forcing the grinder 82 to move to the edge of the gate waste. The grinder 82 operates to grind the gate waste.

[0022] Among them, in the initial state, the height of the bottom of the top die 4 is lower than the height of the cutting knife 5. The width of the gap between the cutting knife 5 and the top die 4 is the width of the gate waste retained at the product edge. When the casting is placed on the bottom die 8, the support block 81 is just located directly below the gate waste to be retained. During use, first place the casting on the lower die 8, then start the main body 1. The operation of the main body 1 forces the movable seat 2 to move downward, driving the upper die 4 and the cutting knife 5 to move downward. Among them, the upper die 4 first contacts the casting and then presses the casting tightly. Subsequently, the cutting knife 5 moves downward to cut off the gate part on the casting, only leaving the product and part of the gate waste. During cutting, the deformation caused by the elasticity of the material itself or due to excessive heat only occurs on the gate waste. After that, the main body 1 operates again to move the movable seat 2 upward by a certain distance. At this time, the cutting knife 5 moves upward with the movable seat 2 and disengages from the casting, but the upper die 4 still presses the casting tightly. Then start the driving mechanism 9. When the driving mechanism 9 operates, it drives the support block 81 to move, so that the support block 81 disengages from the bottom of the remaining gate waste. And when the driving mechanism 9 operates, it also drives the grinder 82 to move, so that the grinder 82 moves to the edge of the remaining gate waste. Subsequently, start the grinder 82, and the grinder 82 grinds the remaining gate waste, and finally only the product is left; By separately arranging the upper die 4 and the cutting knife 5, and arranging the support block 81, the driving mechanism 9 and the grinder 82 on the lower die 8, during the punching work, the cutting knife 5 is used to locally cut the casting, so that part of the gate waste is retained around the product, and thus the deformation generated during cutting occurs on the gate waste. After that, the driving mechanism 9 and the grinder 82 are used to further grind this part of the gate waste. This method can greatly reduce the deformation phenomenon generated by the product on the casting during the punching process, thereby improving the processing quality of the product.

[0023] Embodiment Two: Refer to Figure 6 , different from the above embodiment, the telescopic assembly 6 includes a guide rod 61 fixed to the top of the upper die 4. The guide rod 61 is movably inserted into the movable seat 2. A vertical spring 62 is sleeved outside the guide rod 61. Both ends of the vertical spring 62 are fixedly connected to the upper die 4 and the movable seat 2 respectively.

[0024] Among them, both the guide rod 61 and the vertical spring 62 are provided in four. During use, the downward movement of the movable seat 2 drives the vertical spring 62 to move downward, thereby driving the upper die 4 and the guide rod 61 to move downward. When the upper die 4 contacts the casting, it stops moving downward. At this time, when the upper die 4 continues to move downward, it only drives the cutting knife 5 to move downward and compresses the spring. The elastic force of the spring pushes the upper die 4, thereby pressing the casting tightly. After cutting, when the movable seat 2 moves upward, it first drives the cutting knife 5 to move upward and makes the spring recover its deformation. When the spring returns to its original length, the movable seat 2 will drive the spring to move upward, and the upward movement of the spring drives the upper die 4 to move upward, thereby disengaging from the casting; By setting the telescopic assembly 6, when the telescopic assembly 6 is connected to the upper die 4, the upper die 4 can float up and down, which is convenient for cutting while fixing the casting.

[0025] Embodiment Three, refer to Figures 5 - 9, different from the above embodiments, the side of the lower mold 8 is provided with mounting grooves 83 and transverse sliding grooves 84 with the same direction. The transverse sliding groove 84 is located at the bottom of the mounting groove 83 and communicates with the mounting groove 83. One end of the support block 81 extends into the mounting groove 83 and is horizontally slidably connected to the mounting groove 83. A screw hole 85 is provided at one end of the support block 81 close to the inside of the mounting groove 83. The driving mechanism 9 includes a driving motor 91 fixed inside the mounting groove 83. A driving screw 92 is fixed to the output shaft of the driving motor 91. A bearing seat 93 is mounted on the driving screw 92. The bearing seat 93 is fixed to the inner wall of the mounting groove 83. One end of the driving screw 92 is threadedly connected to the screw hole 85. The driving mechanism 9 further includes a transverse slider 94. The transverse slider 94 is slidably connected to the transverse sliding groove 84. A transverse spring 95 is fixedly connected between one end of the transverse slider 94 and the end of the transverse sliding groove 84. The other end of the transverse slider 94 extends outside the transverse sliding groove 84. A bracket 96 is hinged to the end of the transverse slider 94 outside the transverse sliding groove 84. The grinder 82 is mounted at the end of the bracket 96. A connecting rod 97 is hinged to the end of the support block 81. One end of the connecting rod 97 away from the support block 81 is hinged to the bracket 96. A strip-shaped groove 98 is provided at the top of the transverse slider 94. A convex block 86 is fixedly connected to the bottom of the support block 81. The convex block 86 extends into the strip-shaped groove 98. The grinder 82 includes a slide rail 821 fixed to the end of the bracket 96. An adjusting motor 822 is fixed to the end of the slide rail 821. An adjusting screw 823 is fixed to the output shaft of the adjusting motor 822. The adjusting screw 823 is located inside the slide rail 821 and is rotatably connected to both ends of the slide rail 821. A longitudinal slider 824 is slidably connected inside the slide rail 821. The adjusting screw 823 passes through the longitudinal slider 824 and is threadedly connected to the longitudinal slider 824. A mounting frame 825 is fixed to the side of the longitudinal slider 824 close to the support block 81. A grinding roller 826 is rotatably connected inside the mounting frame 825. A transmission motor 827 is fixed to the end of the mounting frame 825. The output shaft of the transmission motor 827 is fixed to the end of the grinding roller 826.

[0026] Among them, the width of the mounting groove 83 matches the width of the gate. The width of the transverse sliding groove 84 is smaller than the width of the mounting groove 83. The direction of the strip-shaped groove 98 is the same as the direction of the transverse sliding groove 84. In the initial state, the height of the grinder 82 is lower than the height of the lower mold 8. When in use, the drive motor 91 is started, and the drive motor 91 drives the drive screw 92 to rotate. When the drive screw 92 rotates, the support block 81 is driven to move into the installation groove 83. When the support block 81 moves into the installation groove 83, it is separated from the bottom of the retained gate waste. When the support block 81 moves, it also drives the protrusion 86 and one end of the connecting rod 97 to move. The protrusion 86 moves along the strip groove 98, and the other end of the connecting rod 97 pulls the bracket 96, so that the bracket 96 swings. When the bracket 96 swings, the grinder 82 at the end moves accordingly, and finally the grinding roller 826 on the grinder 82 matches the position of the retained gate waste. At the same time, the protrusion 86 contacts one end of the strip groove 98, and then the transmission motor on the grinder 82 is started. The drive motor 827 drives the grinding roller 826 to rotate, and the adjusting motor 822 drives the adjusting screw 823 to rotate when it is running. When the adjusting screw 823 rotates, it drives the longitudinal slider 824 to move. When the longitudinal slider 824 moves, it drives the mounting frame 825, the drive motor 827 on the mounting frame 825 and the grinding roller 826 to move, thereby grinding the retained gate waste. During the grinding process, the drive motor 91 is continuously started. At this time, the drive motor 91 drives the support block 81 to move and also pushes the transverse slider 94 to move together through the protrusion 86, thereby making the bracket 96 and the grinder 82 keep moving in the current state, so as to grind step by step until the edge of the product is ground. By setting up the driving mechanism 9, when the driving mechanism 9 is running, the supporting block 81 and the grinder 82 are first driven to move, so that the supporting block 81 is separated from the retained gate waste, and the grinder 82 contacts the edge of the gate waste, and then the gate waste is ground and removed by the driving mechanism 9 and the grinder 82, and the product body 1 is retained without subsequent processing.

[0027] Example 4, see Figure 6 , which is different from the above embodiment, a transmission slide groove 21 is provided on the bottom wall of the movable seat 2, and the adjusting component 7 is used to drive the cutter 5 to move. The adjusting component 7 includes a transmission slider 71 slidably connected in the transmission slide groove 21, and an adjusting bolt 72 is also provided in the transmission slide groove 21. The adjusting bolt 72 penetrates the transmission slider 71 and is threadedly connected to the transmission slider 71. Both ends of the adjusting bolt 72 are provided with assembly plates 73, and the assembly plates 73 are fixed to the side walls of the movable seat 2 and are rotatably connected to the adjusting bolt 72. A knife holder 74 is fixed to the bottom of the transmission slider 71, and the cutter 5 is fixed on the side of the knife holder 74 close to the upper mold 4.

[0028] When the adjusting bolt 72 is rotated, the transmission slide block 71 can be driven to move along the transmission slide slot 21. When the transmission slide block 71 moves, the tool holder 74 is driven to move. When the tool holder 74 moves, the cutter 5 is driven to move. When the cutter 5 moves, the gap between the cutter 5 and the upper mold 4 changes, and then the area of ​​the gate waste retained by the cutter 5 during cutting changes. By providing the adjusting component 7, it is beneficial to adjust the position of the cutting tool 5, and then adjust the area of the gate waste remaining on the casting according to the different materials of the casting, improving the applicability.

[0029] Embodiment Five. Refer to Figures 2 - 4 , which is different from the above embodiment in that a cooling component 10 is provided on the main body 1. The cooling component 10 is used to cool the grinding part of the grinder 82. The cooling component 10 includes a water tank 101 fixed on the main body 1. A water pump 102 is fixed in the water tank 101. The output end of the water pump 102 is fixed with an output pipe 103. One end of the output pipe 103 penetrates to the outside of the water tank 101. The end of the output pipe 103 outside the water tank 101 is fixed on the tool rest 74. A branch pipe 104 is fixed at the end of the output pipe 103. A plurality of nozzles 105 are fixed on the branch pipe 104. A blanking port 31 is provided on the fixing seat 3. The blanking port 31 is located around the lower die 8. A hopper 32 is further fixed at the bottom of the blanking port 31. A recovery pipe 33 is connected between the bottom of the hopper 32 and the water tank 101. A filter 34 is provided at the connection between the recovery pipe 33 and the bottom of the hopper 32.

[0030] Among them, the water tank 101 is filled with coolant. When the grinder 82 is performing grinding work, the tool rest 74 is just located above the grinding part. At this time, the water pump 102 is started. The water pump 102 operates to pump the coolant into the output pipe 103, then into the branch pipe 104, and finally sprays out through the nozzles 105, just spraying on the grinding part, which can not only cool the grinding part but also reduce dust. The dust flows with the coolant, falls into the hopper 32 through the blanking port 31. Among them, the powder and debris remain in the hopper 32, and the coolant passes through the filter 34 and the recovery pipe 33, and finally flows back to the water tank 101; By providing the cooling component 10, the blanking port 31, the hopper 32, the filter 34 and the recovery pipe 33, when grinding the casting, the cooling component 10 operates to spray the coolant on the grinding part, which can not only cool the casting but also reduce dust and pollution. And the hopper 32 and the filter 34 can be used to collect dust for unified treatment, while the recovery pipe 33 can recover the coolant for repeated use of the coolant.

[0031] Embodiment Six. A die-cast burr cutting process for a card reader housing. This die-cast burr cutting process for a card reader housing uses a die-casting punching machine in the above embodiment.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A die-casting punching machine, comprising a main body, a movable seat and a fixed seat mounted on the main body, characterized in that: An upper mold and a cutting knife are provided at the bottom of the movable seat, and the upper mold is installed at the bottom of the movable seat through a telescopic assembly, and the upper mold is used to fix the casting; The cutter is installed at the bottom of the movable seat through an adjustment component, and the cutter is used to cut the gate part of the casting, and a gap is set between the cutter and the upper mold; A lower mold is fixed on the top of the fixed seat, and the lower mold is used to position the casting. A support block and a grinder are installed on the side of the lower mold. The edge of the support block is located directly below the cutter. The support block is used to support the gate of the casting, and the grinder is used to grind the cutting part. A driving mechanism is also installed inside the lower mold, and the driving mechanism is used to drive the support block and the grinder to move; When the main body is running, the upper mold and the cutter are forced to move downward. The upper mold is fixed to the casting in advance, and then the cutter cuts along the edge of the support block, forcing the edge of the product to retain part of the gate waste. After that, the driving mechanism is operated to separate the support block from the bottom of the retained gate waste, and also forces the grinder to move to the edge of the gate waste. The grinder operates to grind the gate waste.

2. The die-casting punching machine according to claim 1, characterized in that: The telescopic assembly comprises a guide rod fixed on the top of the upper mold, the guide rod is movably plugged with the movable seat, a vertical spring is sleeved on the outer side of the guide rod, and two ends of the vertical spring are respectively fixedly connected to the upper mold and the movable seat.

3. The die-casting punching machine according to claim 1, characterized in that: The side of the lower mold is provided with an installation groove and a transverse sliding groove in the same direction, the transverse sliding groove is located at the bottom of the installation groove and is connected to the installation groove, one end of the support block extends into the installation groove and is connected to the installation groove in a transverse sliding manner, and a screw hole is provided at one end of the support block close to the interior of the installation groove.

4. The die-casting punching machine according to claim 3, characterized in that: The drive mechanism includes a drive motor fixed inside the mounting groove, the drive motor output shaft is fixed with a drive screw, the drive screw is installed with a bearing seat, the bearing seat is fixed to the inner wall of the mounting groove, one end of the drive screw is threadedly connected to the screw hole, the drive mechanism also includes a transverse slider, the transverse slider is slidably connected to the transverse slide groove, a transverse spring is fixedly connected between one end of the transverse slider and the end of the transverse slide groove, the other end of the transverse slider extends to the outside of the transverse slide groove, the transverse slider is hingedly connected to a bracket at one end outside the transverse slide groove, the grinder is installed at the end of the bracket, the end of the support block is hingedly connected with a connecting rod, the connecting rod is hinged to the bracket at one end away from the support block, a strip groove is opened on the top of the transverse slider, a protrusion is fixedly connected to the bottom of the support block, and the protrusion extends to the inside of the strip groove.

5. The die-casting punching machine according to claim 4, characterized in that: The grinder includes a slide rail fixed to the end of the bracket, an adjusting motor is fixed to the end of the slide rail, an adjusting screw is fixed to the output shaft of the adjusting motor, the adjusting screw is located inside the slide rail and is rotatably connected to both ends of the slide rail, a longitudinal slider is slidably connected inside the slide rail, the adjusting screw passes through the longitudinal slider and is threadedly connected to the longitudinal slider, a mounting frame is fixed to the side of the longitudinal slider close to the support block, a grinding roller is rotatably connected to the inner side of the mounting frame, a transmission motor is fixed to the end of the mounting frame, and the output shaft of the transmission motor is fixed to the end of the grinding roller.

6. The die-casting punching machine according to claim 1, characterized in that: The bottom wall of the movable seat is provided with a transmission slide groove, and the adjusting component is used to drive the cutting knife to move. The adjusting component includes a transmission slide block slidably connected in the transmission slide groove, and an adjusting bolt is also provided in the transmission slide groove. The adjusting bolt passes through the transmission slide block and is threadedly connected to the transmission slide block. Both ends of the adjusting bolt are provided with assembly plates, and the assembly plates are fixed to the side walls of the movable seat and are rotatably connected to the adjusting bolt. A knife holder is fixed to the bottom of the transmission slide block, and the cutting knife is fixed on the side of the knife holder close to the upper mold.

7. The die-casting punching machine according to claim 1, characterized in that: The main body is provided with a cooling assembly, which is used to cool the grinding part of the grinder. The cooling assembly includes a water tank fixed on the main body, a water pump fixed in the water tank, an output pipe fixed at the output end of the water pump, one end of the output pipe passes through the outside of the water tank, one end of the output pipe is located outside the water tank and is fixed to the tool holder, a branch pipe is fixed at the end of the output pipe, and a plurality of nozzles are fixed on the branch pipe.

8. The die-casting punching machine according to claim 7, characterized in that: The fixed seat is provided with a feeding port, the feeding port is located around the lower mold, and a hopper is fixed at the bottom of the feeding port.

9. The die-casting punching machine according to claim 8, characterized in that: A recovery pipe is connected between the bottom of the hopper and the water tank, and a filter is arranged at the connection between the recovery pipe and the bottom of the hopper.

10. A die-casting burr cutting process for a card reader housing, characterized in that: The die-casting burr cutting process for the card reader housing uses a die-casting punching machine as described in any one of claims 1-9.

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