A deburring device for stamped parts and its usage method

Abstract

This invention relates to the field of stamping production technology, specifically to a deburring device for stamped parts and its usage method. The device includes a punch press equipped with a discharge track and a control unit; it also includes a deburring device connected to the discharge track, which can quickly remove burrs from the bottom of iron stamped parts without flipping them. The invention features a housing above the discharge track, with a conveyor belt and a magnetic chuck inside. A second housing is connected to one side of the discharge track, containing an abrasive belt. The second conveyor belt is located below the end of the first conveyor belt furthest from the punch press, and a distance sensor is mounted on the second conveyor belt. When the stamped part moves along the discharge track to below the first conveyor belt and the magnetic chuck, it is attracted by the magnetic chuck. Then, relying on magnetic force and friction with the first conveyor belt, it moves towards the abrasive belt. As it passes above the abrasive belt, the abrasive belt performs grinding, allowing the workpiece to be deburred directly without flipping it to face upwards.

Description

Technical Field

[0001] This invention relates to the field of stamping production technology, specifically to a deburring device for stamped parts and its usage method. Background Technology

[0002] For general types of punch presses, during the stamping production process, burrs are inevitably generated on the workpiece because stamping involves extruding and cutting the workpiece using a die. These burrs are located at the bottom of the stamped part. Since manual deburring is labor-intensive and inefficient, many manufacturers use machines to deburr stamped parts. Existing deburring machines require continuous operation, and the stamped parts need to be conveyed by a conveyor belt. Therefore, most machines place the grinding wheel or belt above the conveyor belt. When using a machine for deburring, the stamped part must first be flipped so that the burrs face upwards before being fed into the deburring equipment, which is labor-intensive and time-consuming. In existing solutions, when processing stamped parts with narrow widths, a ramp guide plate slightly lower than the discharge track is installed behind the discharge track. As the stamped part falls down the ramp guide plate after leaving the discharge track, it flips over before entering the deburring equipment. However, this solution is not suitable for workpieces that are too wide or have uneven gravity distribution. If the width is too large, it will be difficult to flip the workpiece. The flipping process of workpieces with uneven gravity distribution is very unstable and may not be able to be flipped or may be over-flipped.

[0003] Therefore, a deburring device for stamped parts and its usage method are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a deburring device for stamped parts and its usage method. A housing is installed above the discharge track, and a conveyor belt and a magnetic chuck are installed inside the housing. A second housing is connected to one side of the discharge track, and an abrasive belt is installed inside the second housing. The second conveyor belt is located below the end of the first conveyor belt away from the stamping press, and a distance sensor is installed on the second conveyor belt. When the stamped part moves along the discharge track to below the first conveyor belt and the magnetic chuck, it can be picked up by the magnetic chuck. Then, relying on the magnetic force and friction of the first conveyor belt, it moves along the first conveyor belt towards the abrasive belt. When passing above the abrasive belt, the abrasive belt performs grinding work, allowing the workpiece to be deburred directly without having to flip it over to face upwards, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A deburring device for stamped parts and its method of use, comprising:

[0007] A punch press, wherein a discharge rail is provided on one side of the punch press, and a control unit is provided on the punch press;

[0008] Also includes:

[0009] A deburring device is provided, wherein the discharge track is connected to the deburring device, which can quickly remove the bottom burrs of iron stamping parts without flipping the stamping parts.

[0010] The punch press described in this invention is used for stamping iron flat parts. The punch press has a discharge rail on its side and a robotic gripper for picking up and placing the stamped parts. The gripper places the stamped parts onto the discharge rail, where they are then discharged. For general types of punch presses, burrs inevitably form on the workpiece during the stamping process, and these burrs are located at the bottom of the stamped part. Previously, deburring required flipping the stamped part so that the burrs faced upwards before feeding it into the deburring equipment. This invention connects the deburring device behind the discharge rail, eliminating the need to flip the workpiece and allowing direct removal of burrs from the bottom of the workpiece.

[0011] Preferably, the deburring device includes a conveying device, a grinding device, and a feeding device;

[0012] The conveying device includes a housing, a conveyor belt, and a magnetic chuck. The housing is located above the discharge track. The conveyor belt is located inside the housing. The magnetic chuck for picking up iron stampings is located inside the conveyor belt. The magnetic chuck is an electromagnetic chuck with adjustable magnetic force. The magnetic chuck is electrically connected to the control unit.

[0013] The grinding device includes a sanding belt and a second housing. The second housing is connected to one side of the discharge track. The second housing contains a sanding belt, which is located below the first conveyor belt. The sanding belt rotates in the opposite direction to the first conveyor belt.

[0014] The feeding device includes a second conveyor belt. The second conveyor belt is located below the end of the first conveyor belt away from the punch press for discharging material. A distance sensor is provided on the second conveyor belt, and the distance sensor is electrically connected to the control unit.

[0015] The main innovation of this invention lies in the inverted deburring device. After leaving the press, the stamped part enters the discharge track and then moves to the area below the first conveyor belt and the magnetic chuck. When the stamped part approaches the magnetic chuck, the magnetic chuck lifts it up using magnetic force. Then, under the action of the magnetic force of the magnetic chuck and the friction of the first conveyor belt, the stamped part moves backward with the first conveyor belt. When it moves above the abrasive belt, the abrasive belt grinds away the burrs on the bottom of the stamped part. During the process, the stamped part always moves with the first conveyor belt. After grinding is completed, the stamped part moves above the second conveyor belt. After the distance sensor detects the workpiece, it feeds back to the control unit. The control unit controls the magnetic chuck to reduce the magnetic force, causing the stamped part to fall onto the second conveyor belt for discharge.

[0016] Preferably, a stainless steel plate is movably provided between the magnetic chuck and the first conveyor belt to prevent the first conveyor belt from rubbing against the magnetic chuck. The stainless steel plate has sidewalls at both ends to avoid scratching the smooth transition of the first conveyor belt. The first conveyor belt is made of a non-ferromagnetic material.

[0017] The magnetic chuck is in a fixed position. After the stamped part is magnetically attracted, it moves along with the conveyor belt due to the friction between the surface of the stamped part and the conveyor belt. During this movement, the conveyor belt rubs against the magnetic chuck. To prevent wear and tear between the conveyor belt and the magnetic chuck, which could reduce the equipment's lifespan, a stainless steel plate is placed between the conveyor belt and the magnetic chuck to separate them. The stainless steel plate has a smooth surface to reduce friction. It also has smooth transition sidewalls at both ends to prevent the edges from being too sharp and scratching the conveyor belt. Furthermore, since one side of the stainless steel plate is the magnetic chuck, it undergoes demagnetization during manufacturing to prevent it from interfering with the chuck's operation. The surface of the conveyor belt is made of PVC and features anti-slip patterns to increase friction between the conveyor belt and the stamped part, ensuring no relative displacement between them and guaranteeing stable grinding and deburring operations.

[0018] Preferably, a buffer device is provided between the magnetic chuck and the stainless steel plate to prevent the stamped parts from impacting and damaging the magnetic chuck.

[0019] Because the stamped parts vary in size and are conveyed intermittently, the stainless steel plate used must be a single flat steel plate with sufficient strength. If multiple plates are used together, the stamped parts may get stuck between two plates. Therefore, the length of the stainless steel plate needs to match the length of the magnetic chuck and the conveyor belt. When the magnetic chuck picks up the stamped parts, the parts will impact the stainless steel plate, potentially causing significant vibration. Excessive vibration can damage the surface of the conveyor belt and even deform the stainless steel plate. Therefore, in addition to the stainless steel plate, a buffer device is installed between the stainless steel plate and the magnetic chuck to absorb the impact force of the stamped parts. The magnetic chuck is located on one side of the stainless steel plate, and the added buffer device also prevents the stamped parts from damaging the magnetic chuck.

[0020] Preferably, the buffer device is a hydraulic buffer, which is evenly distributed above the stainless steel plate.

[0021] There are various mechanisms or components with a cushioning effect, such as springs or rubber pads. Considering that the magnetic chuck in this invention needs to overcome the gravity of the stamped part to lift it, the workload of the cushioning device is relatively large during operation. Compared with springs and rubber pads, hydraulic buffers are more suitable for conditions with large impacts. Under such conditions, hydraulic buffers can provide better cushioning and are more durable than ordinary springs and rubber pads. In addition, hydraulic buffers need to be evenly distributed on the stainless steel plate to evenly disperse the impact force and reduce the impact on the stainless steel plate.

[0022] Preferably, the magnetic chuck is divided into multiple areas, with the area above the sanding belt having the strongest magnetic force. This area with the strongest magnetic force is used to ensure that the stamped part remains fixed relative to the conveyor belt during deburring.

[0023] To ensure smooth equipment operation and prevent the sanding belt from throwing the stamped parts off, the stamped parts must remain fixed relative to the conveyor belt during grinding to guarantee stable grinding. The magnetic chucks in this invention are electromagnetic chucks, allowing for adjustment of their magnetic force. Therefore, the magnetic chucks are zoned for more precise control of the stamped parts. During operation, the magnetic chucks need to provide significant magnetic force when picking up and grinding the stamped parts. Since stable conveying behind the sanding belt is sufficient, the area above the sanding belt is designated as the region with the strongest magnetic force, and it operates at high magnetic force throughout the process. Considering that higher magnetic force increases friction between the conveyor belt and the stainless steel plate, the rear area is designated as a region with slightly weaker magnetic force. This ensures normal conveying while reducing friction and wear.

[0024] Preferably, a third conveyor belt is provided between the second conveyor belt and the second outer shell, and the third conveyor belt is provided with a detection device for detecting whether the burrs on the stamped parts have been removed cleanly;

[0025] The detection device includes a bracket, a crossbar, a spring, and a pressure sensor. The bracket is connected to three sides of the conveyor belt. A crossbar for detecting burrs is movably connected inside the bracket. A spring is provided below the crossbar. A pressure sensor is provided at the top of the bracket and contacts the crossbar. The pressure sensor is electrically connected to the control unit.

[0026] The detection device is used to inspect the deburring condition of stamped parts. A crossbar is installed below the conveyor belt. When the stamped part passes over the crossbar, if the burrs are not completely removed, the protruding burrs will press against the crossbar. Pressure sensors are located at both ends of the crossbar and are normally open. When the crossbar is pressed down, it separates from the pressure sensors. After the pressure sensors no longer detect pressure, the control unit receives feedback and controls the magnetic chucks above the third conveyor belt to reduce their magnetic force, causing the stamped part to fall onto the third conveyor belt. The third conveyor belt then transports the undesirable stamped parts to the rear for manual processing. Simultaneously, because the detection device determines whether the burr removal is satisfactory by detecting the thickness of the stamped part, it can also be used to detect workpieces with dents or protrusions due to stamping deformation, and can separate deformed workpieces from qualified workpieces using the same steps.

[0027] Preferably, the crossbar is provided with a roller, and when the stamped part passes over the roller, the roller will roll and contact the burr.

[0028] The addition of rollers is mainly used to reduce the friction between burrs and crossbars. When the crossbar comes into contact with burrs that are severely protruding, the stamped part may get stuck on the crossbar, which may cause equipment malfunction and affect production. At the same time, the addition of rollers changes the sliding friction between burrs and crossbars to rolling friction, which can greatly reduce the scratches or abrasions caused by burrs on the crossbars, avoid damage to the crossbars, and improve their service life.

[0029] Preferably, a second support is provided between the support and the conveyor belt three, the second support is fixedly connected to the conveyor belt three, a first support is slidably connected inside the second support, a first bolt for fixing the first support is provided on the side of the second support, and a second bolt for adjusting the height of the first support is provided at the bottom of the second support.

[0030] When a punch press is stamping parts of different specifications, the height distance between the ejector track and the first conveyor belt can be adjusted to accommodate stamping parts of varying thicknesses. In this case, the adjustment of the height between the ejector track and the first conveyor belt does not need to be particularly precise; a rough adjustment is sufficient. However, in the production of the same batch of stamped parts, various factors, such as abrasive belt wear and thickness errors between the raw materials, may lead to errors in the detection of the crossbar. Therefore, a relatively precise adjustment of the crossbar is required. Simultaneously, based on basic operating conditions, the height of the crossbar also needs a relatively precise adjustment mechanism because the height of the burr is relatively small compared to the thickness of the stamped part. If the crossbar height cannot be precisely adjusted, the detection accuracy will be very low. Bolt one is used to fix bracket one, and bolt two is used to adjust the height of bracket one. The combination of these two allows for relatively precise height adjustment to adapt to more operating conditions.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. This invention features a housing above the discharge track, with a conveyor belt and a magnetic chuck inside. A second housing is connected to one side of the discharge track, and a sanding belt is installed inside the second housing. The second conveyor belt is located below the end of the first conveyor belt away from the punch press, and a distance sensor is installed on the second conveyor belt. When the stamped part moves along the discharge track to the area below the first conveyor belt and the magnetic chuck, it can be picked up by the magnetic chuck. Then, relying on the magnetic force and friction of the first conveyor belt, it moves along the first conveyor belt towards the sanding belt. When it passes over the sanding belt, the sanding belt performs grinding work. For stamped parts with a large width that are not suitable for deburring by machine flipping, this invention allows the workpiece to be deburred directly without flipping it to face upwards, meeting the deburring needs of various types of iron stamped parts.

[0033] 2. The present invention provides a stainless steel plate that is movably installed between the conveyor belt and the magnetic chuck, and a hydraulic buffer that is installed between the stainless steel plate and the magnetic chuck. This allows the impact force generated on the conveyor belt when the stamped part rises to be transmitted to the hydraulic buffer. The hydraulic buffer is compressed after being impacted to buffer the impact, thereby reducing the adverse impact of the stamped part on the magnetic chuck and ensuring the service life of the equipment.

[0034] 3. This invention provides a conveyor belt three between conveyor belt two and outer casing two. A bracket is connected to the side of conveyor belt three, and a crossbar is movably connected inside the bracket. A spring is located below the crossbar, and a pressure sensor is located at the top of the bracket, in contact with the crossbar. The pressure sensor is electrically connected to the control unit. This enables the equipment to detect whether burrs have been removed cleanly. When a stamped part with burrs passes over the crossbar, it will press the crossbar downwards, separating the crossbar from the pressure sensor. After the pressure sensor no longer detects pressure, the control unit receives feedback and controls the magnetic chuck in the area above conveyor belt three to reduce the magnetic force, causing the stamped part to fall onto conveyor belt three. Conveyor belt three transports the stamped parts that fail to deburr to the rear to distinguish defective products, avoiding the time-consuming manual inspection. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 Cross-sectional view of the present invention Figure 1 ;

[0037] Figure 3 for Figure 2 Enlarged schematic diagram of part A;

[0038] Figure 4 Cross-sectional view of the present invention Figure 2 ;

[0039] Figure 5 for Figure 4 Enlarged schematic diagram of part B;

[0040] Figure 6 This is a schematic diagram of the crossbar structure of the present invention;

[0041] Figure 7 This is a schematic diagram of the distance sensor structure of the present invention.

[0042] In the diagram: 1. Punch press; 2. Discharge track; 3. Outer casing 1; 4. Conveyor belt 1; 5. Magnetic chuck; 6. Sanding belt; 7. Outer casing 2; 8. Conveyor belt 2; 9. Distance sensor; 10. Stainless steel plate; 1001. Side wall; 11. Hydraulic shock absorber; 12. Conveyor belt 3; 13. Support 1; 14. Crossbar; 1401. Roller; 15. Spring; 16. Pressure sensor; 17. Support 2; 18. Bolt 1; 19. Bolt 2. Detailed Implementation

[0043] Please see Figures 1 to 7 This invention provides a deburring device for stamped parts and its usage method, the technical solution of which is as follows:

[0044] Equipment usage instructions:

[0045] S1: Place the workpiece that has not yet been stamped above the crossbar 14, and then adjust the height of the crossbar 14 by bolt 2 19 so that the crossbar 14 is as close as possible to the workpiece and ensures that the workpiece does not contact the crossbar 14 when it moves. Then tighten bolt 18 to fix bracket 13 to fix the height of the crossbar 14.

[0046] S2: Press the stainless steel plate 10 by hand through the conveyor belt 4 to check if the hydraulic buffer 11 is working properly.

[0047] S3: Place the workpiece that has not yet been stamped under the magnetic chuck 5, adjust the magnetic force of the magnetic chuck 5 to 150% of the weight of the stamped part, turn on the magnetic chuck 5, and make sure that the magnetic chuck 5 can normally pick up the stamped part.

[0048] S4: After the inspection is completed, start punch press 1 to perform the stamping operation of the workpiece. Specific Implementation Example 1:

[0050] Operating status: Deburring equipment

[0051] The punch press 1 in this invention is used to stamp iron flat parts. The punch press 1 has a discharge track 2 on its side and a robotic gripper on it for picking up and placing the stamped parts. The gripper places the stamped parts onto the discharge track 2, where they are then discharged. After leaving the punch press 1, the stamped parts enter the discharge track 2 and then move to the area below the conveyor belt 4 and the magnetic chuck 5. When the stamped parts approach the magnetic chuck 5, the magnetic chuck 5 uses magnetic force to lift them up. A stainless steel plate 10 is movably mounted behind the conveyor belt 4. Under the action of the hydraulic buffer 11, the stainless steel plate 10 is in close contact with the conveyor belt 4, and both ends of the stainless steel plate 10 have sidewalls 1001 with smooth transitions. The sidewalls 1001 can be adjusted as the conveyor belt 4 moves relative to the stainless steel plate 10. To prevent the conveyor belt 4 from being scratched or abraded; after the stamped part is picked up, it generates a certain impact force on the conveyor belt 4. The impact force is transmitted through the conveyor belt to the hydraulic buffer 11, which is compressed to buffer the impact and reduce the adverse effects of the stamped part's impact on the conveyor belt 4 and the magnetic chuck 5; after the stamped part is picked up, the magnetic chuck 5 always provides magnetic force to the stamped part, so that it always adheres tightly to the conveyor belt 4 within the range of the magnetic chuck 5, and the stamped part always moves with the conveyor belt 4 within the magnetic force range. Due to the special nature of the conveyor belt 4, when selecting the material for the conveyor belt 4, it is necessary to select a material with a large static friction between the surface of the material and the iron stamped part as the manufacturing material of the conveyor belt 4.

[0052] The stamped part moves along conveyor belt 4 to the top of sanding belt 6, where sanding belt 6 grinds away the burrs on the bottom of the stamped part. Since the magnetic chuck 5 of this invention is an electromagnetic chuck 5 and has partitions, different magnetic force settings can be applied to different areas of the magnetic chuck 5 via a control unit. When the stamped part is picked up and ground over sanding belt 6, it is subjected to relatively strong magnetic attraction, ensuring that the stamped part can be smoothly picked up. It also ensures that the magnetic force keeps the stamped part relatively fixed to conveyor belt 4 during grinding, guaranteeing the grinding effect of sanding belt 6 and preventing the stamped part from being flung away by the friction of sanding belt 6.

[0053] After the stamped part is deburred by grinding, it continues to move backward along the first conveyor belt 4. After the stamped part moves above the second conveyor belt 8, the distance sensor 9 detects the workpiece and feeds back to the control unit. The control unit controls the magnetic chuck 5 to reduce the magnetic force, so that the stamped part falls onto the second conveyor belt 8 for unloading. Specific Implementation Example 2:

[0055] Working status: Checking whether burrs have been completely removed.

[0056] This equipment has the function of detecting whether the burrs on the stamped parts have been removed. Before the equipment is run, the height of the crossbar 14 needs to be adjusted according to the thickness of the stamped parts. By detecting the thickness difference of the stamped parts, it can be determined whether the burrs on the stamped parts have been removed. When the equipment is operating normally, after the stamped part has been ground by the abrasive belt 6, it moves to the top of the crossbar 14 along the conveyor belt 4. At this time, the workpiece is above the crossbar 14. When the burrs on the bottom of the workpiece are removed cleanly, the workpiece does not contact the crossbar 14 and passes smoothly. When the burrs on the bottom of the workpiece are not removed cleanly, the burrs protrude from the surface of the workpiece. When the workpiece passes above the crossbar 14, the burrs contact the crossbar 14. The roller 1401 on the crossbar 14 rotates to prevent the crossbar 14 from being scratched. At the same time, the crossbar 14 moves downward under the pressure of the burrs. The spring 15 connected to the crossbar 14 is compressed. After the crossbar 14 moves down, it separates from the pressure sensor 16. After the pressure sensor 16 can no longer detect the pressure, the control unit receives feedback and controls the magnetic chuck 5 in the area above the conveyor belt 12 to reduce the magnetic force, so that the stamped part falls onto the conveyor belt 12. The conveyor belt 12 transports the stamped parts that fail to meet the deburring requirements to the rear for manual processing. The above detection method can also be used to detect stamped deformed workpieces. When there are dents or protrusions on the workpiece, the stamped deformed workpieces can be separated from qualified workpieces according to the above steps.

[0057] The above embodiments are merely two examples of demonstrating the technical features of the present invention. The inventive structure described in this invention is only one of the illustrated structures and does not represent the only structure of the present invention. Any simple modifications or equivalent substitutions made based on the technical essence of the present invention should be included within the protection scope of the present invention.

Claims

1. A deburring device for stamped parts, comprising: A punch press, wherein a discharge rail is provided on one side of the punch press, and a control unit is provided on the punch press; The feature is that it further includes: a deburring device, wherein the discharge track is connected to the deburring device, and the deburring device can quickly remove the bottom burrs of the iron stamping part without flipping the stamping part; The deburring device includes a conveying device, a grinding device, and a feeding device; The conveying device includes a housing, a conveyor belt, and a magnetic chuck. The housing is located above the discharge track. The conveyor belt is located inside the housing. The magnetic chuck for picking up iron stampings is located inside the conveyor belt. The magnetic chuck is an electromagnetic chuck with adjustable magnetic force. The magnetic chuck is electrically connected to the control unit. The grinding device includes a sanding belt and a second housing. The second housing is connected to one side of the discharge track. The second housing contains a sanding belt, which is located below the first conveyor belt. The sanding belt rotates in the opposite direction to the first conveyor belt. The feeding device includes a second conveyor belt. The second conveyor belt is located below the end of the first conveyor belt away from the punch press for discharging material. A distance sensor is provided on the second conveyor belt, and the distance sensor is electrically connected to the control unit. A stainless steel plate is movably provided between the magnetic chuck and the first conveyor belt to prevent the first conveyor belt from rubbing against the magnetic chuck. The stainless steel plate has sidewalls at both ends to avoid scratching the first conveyor belt. The first conveyor belt is made of non-ferromagnetic material. A buffer device is provided between the magnetic chuck and the stainless steel plate to prevent the stamped parts from impacting and damaging the magnetic chuck. The buffer device is a hydraulic buffer, which is evenly distributed above the stainless steel plate.

2. The deburring equipment for stamped parts according to claim 1, characterized in that: The magnetic chuck is divided into multiple areas, with the area above the sanding belt having the strongest magnetic force. This area with the strongest magnetic force is used to ensure that the stamped parts remain fixed relative to the conveyor belt during deburring.

3. The deburring equipment for stamped parts according to claim 1, characterized in that: A third conveyor belt is provided between the second conveyor belt and the second outer shell. The third conveyor belt is equipped with a detection device for detecting whether the burrs on the stamped parts have been completely removed. The detection device includes a bracket, a crossbar, a spring, and a pressure sensor. The bracket is connected to three sides of the conveyor belt. A crossbar for detecting burrs is movably connected inside the bracket. A spring is provided below the crossbar. A pressure sensor is provided at the top of the bracket and contacts the crossbar. The pressure sensor is electrically connected to the control unit.

4. The deburring equipment for stamped parts according to claim 3, characterized in that: The crossbar is equipped with a roller, and when the stamped part passes over the roller, the roller will roll and contact the burr.

5. The deburring equipment for stamped parts according to claim 3, characterized in that: A second support is provided between the support frame and the conveyor belt three. The second support is fixedly connected to the conveyor belt three. A first support is slidably connected inside the second support. A bolt for fixing the first support is provided on the side of the second support. A bolt for adjusting the height of the first support is provided at the bottom of the second support.

6. A method of using the deburring equipment for stamped parts according to claim 5, characterized in that: S1: Place the workpiece that has not yet been stamped above the crossbar, and then adjust the height of the crossbar by bolt two so that the crossbar two is as close as possible to the workpiece, and ensure that the workpiece does not contact the crossbar two when moving. Then tighten bolt one to fix bracket one to fix the height of the crossbar. S2: Press the stainless steel plate by hand through the conveyor belt to check if the hydraulic buffer is working properly; S3: Place the workpiece that has not yet been stamped under the magnetic chuck, adjust the magnetic force of the magnetic chuck to 150% of the weight of the stamped part, turn on the magnetic chuck, and make sure that the magnetic chuck can normally pick up the stamped part. S4: After the inspection is completed, start the punch press to perform the stamping operation on the workpiece.

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