Distribution box shell stamping equipment and method

Abstract

The invention discloses distribution box shell stamping equipment and method.The distribution box shell stamping equipment comprises a bottom plate, a stamping support, a stamping air cylinder, an upper die, a lower die, an adsorption mechanism, a stamping stabilizing mechanism and a conveying mechanism, the stamping support, the stamping stabilizing mechanism and the conveying mechanism are installed on the bottom plate, and the stamping air cylinder is installed on the stamping support; the upper die is fixed on an actuating rod of the stamping cylinder, the upper die is mounted on the stamping stabilizing mechanism, and the adsorption mechanism is mounted on the upper die; the stamping stabilizing mechanism is used for adjusting the air suction amount of the adsorption mechanism when the to-be-stamped part is placed; the adsorption mechanism is used for generating suction force according to the air suction amount, the mass of the to-be-stamped part and the action of the reset spring when the to-be-stamped part is placed, and the to-be-stamped part is adsorbed through the suction force. Adsorption positioning of a stamping part can be achieved, stress concentration during stamping can be reduced, and the stamping quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of distribution box processing, and in particular to a distribution box shell stamping device and method. Background Art

[0002] The distribution box is an electrical equipment with many characteristics, including small size, easy installation, special technical performance, fixed position, unique configuration function, no site restrictions, relatively common application, stable and reliable operation, high space utilization, small footprint and environmental protection effect, etc. It is used to command the control center of various components in the power supply line to reasonably distribute electric energy. It is a control link that reliably accepts the upper power supply and correctly feeds out the load power. It is also the key to obtaining the user's satisfaction with the power supply quality. During the processing of the distribution box, the shell is processed and formed by stamping equipment; For example, application number: CN 216150880 U. The present invention discloses a stamping die for producing a distribution box housing, which can quickly activate spare equipment, save time, improve efficiency, and improve reliability. The front end of the lower part of the rear side frame is connected to the middle side of the lower part of the rear end of the mother mold support, the middle part of the front end of the rear side frame is connected to the rear end of the middle side support plate, the bottom end of the stamping screw tube is screwed to the top end of the stamping screw rod, the bottom end of the second constraint tube is slidably connected to the top end of the second constraint rod, the bottom end of the stamping screw and the second constraint rod are connected to the top end of the sub-mold seat, the bottom end of the sub-mold seat is connected to the top end of the sub-mold, the top of the mother mold support is connected to the bottom end of the mother mold, and the middle part of the front end of the middle side support plate is connected to the rear end of the controller; Based on the search of the above patents and combined with the equipment in the prior art, it is found that in the stamping process of the distribution box shell, the sheet metal is calibrated before stamping. During the stamping deformation process, the sheet metal forming positions are not uniform, resulting in uneven force levels at various positions. The sheet metal is easily offset and stress is concentrated during the stamping process, affecting the forming effect of the distribution box. Therefore, a distribution box shell stamping device and method are needed. Summary of the invention

[0003] Purpose of the invention: In order to solve the problem of plate displacement and stress concentration during the stamping process of the distribution box, the present invention provides a distribution box shell stamping device and method.

[0004] Technical solution: To achieve the above purpose, the technical solution adopted by the present invention is: Compared with the prior art, the present invention has the following beneficial effects: A distribution box shell stamping equipment includes a base plate, a stamping bracket, a stamping cylinder, an upper die, a lower die, an adsorption mechanism, a stamping stabilization mechanism and a conveying mechanism, wherein the stamping bracket, the stamping stabilization mechanism and the conveying mechanism are mounted on the base plate, the stamping cylinder is mounted on the stamping bracket, the upper die is fixed on the action rod of the stamping cylinder, the upper die is mounted on the stamping stabilization mechanism, and the adsorption mechanism is mounted on the upper die. The upper die and the lower die match each other, and the upper die and the lower die are arranged relatively to each other. The lower die is located in the middle of the conveying mechanism. The stamping stabilization mechanism is used to adjust the suction volume of the adsorption mechanism when the part to be stamped is placed. The adsorption mechanism is used to generate suction force according to the suction volume, the mass of the part to be stamped and the action of the reset spring when the part to be stamped is placed, and the part to be stamped is adsorbed by the suction force.

[0005] Preferably: the adsorption mechanism includes more than two adsorption units. The adsorption unit includes a stamping slide, a support tube, a piston, and a support cylinder. The stamping slide is provided with an air suction hole. The top end of the support tube extends from the T-shaped hole. The stamping slide is installed at the top end of the support tube, and the air suction hole is connected to the support tube. The bottom end of the support tube extends into the support cylinder, and the piston is installed at the bottom end of the support tube. The support tube and the support cylinder are sealed by a sealing rubber ring. A first air hole is provided at the bottom of the support tube, a second air hole is provided at the bottom of the support cylinder, a third air hole is provided at the top of the support cylinder, an exhaust pipe is installed on the third air hole, and an electromagnetic valve is provided on the exhaust pipe. The first spring is used to reset the support tube.

[0006] Preferably, the stamping stabilizing mechanism comprises a movable support plate, a supporting elastic member, and a slider, wherein the movable support plate is tiltedly arranged on the bottom plate, and one end of the movable support plate is rotatably connected to the bottom plate via a rotating shaft, and the other end is provided with a slide rail, and the slide rail is mounted on the slide rail, and the slide rail is slidably connected to the slide rail. The bottom end of the supporting elastic member is fixedly connected to the bottom plate, and the top end is fixedly connected to the slider.

[0007] Preferably, the top surface of the lower mold is provided with more than two T-shaped holes, the T-shaped holes are arranged in rows and columns on the top surface of the lower mold, and the adsorption units are arranged in one-to-one correspondence with the T-shaped holes.

[0008] Preferably, the conveying mechanism comprises a lifting cylinder, a conveying roller frame, a rubber roller, a conveying motor, and a limit assembly. The conveying roller frame is arranged on both sides of the lower mold, and the conveying roller frame is provided with a rubber roller, and a sprocket is arranged on the rubber roller. The rubber rollers on the conveying roller frame on each side are connected to the sprocket through a chain, and the conveying motor is connected to a rubber roller on the conveying roller frame on each side. The fixed end of the lifting cylinder is fixedly connected to the movable support plate, the lifting end of the lifting cylinder is fixedly connected to the limit assembly, and the conveying roller frame is fixedly mounted on the limit assembly.

[0009] Preferably, the position limiting assembly comprises a second spring, a connecting frame and a positioning column, wherein the positioning column is fixed on the movable support plate. One end of the connecting frame is fixed on the conveying roller frame, and the other end passes through the positioning column and is slidably connected with the positioning column. The second spring is sleeved on the positioning column, and the upper end of the second spring abuts against the connecting frame, and the lower end abuts against the movable support plate.

[0010] Preferably, the limiting assembly comprises a limiting plate, the limiting plate is fixed on the movable supporting plate, and the limiting plate is located around the connecting frame.

[0011] Preferably, a rubber layer is provided on the top of the stamping slide.

[0012] Preferably, the angle between the movable support plate and the bottom plate is 0.5-2°.

[0013] A method for stamping a distribution box shell, using the distribution box shell stamping equipment, comprises the following steps: Step 1: Place the workpiece to be stamped on the conveying mechanism. The conveying mechanism conveys the workpiece to be stamped to the top of the lower die.

[0014] Step 2, the conveying mechanism descends and places the part to be stamped on the lower mold. At this time, since the movable support plate is tilted on the bottom plate, when the part to be stamped is placed on the lower mold, there is an angle between the part to be stamped and the stamping carriage. Under the gravity of the part to be stamped, the part to be stamped presses the stamping carriage and moves downward. Since there is an angle between the part to be stamped and the lower mold, the space formed by the piston, the support tube and the upper part of the support cylinder is the expansion suction space. The air enters the support tube from the angle gap between the part to be stamped and the stamping carriage, and enters the expansion suction space through the support tube. The stamping carriage moves downward to deform the first spring. With the gravity of the part to be stamped, the part to be stamped presses the stamping carriage and moves downward until the part to be stamped is completely parallel to the stamping carriage. At this time, the part to be stamped is tightly fitted with the stamping carriage, and external air cannot enter the expansion suction space. The part to be stamped continues to move downward under the action of gravity, and the part to be stamped presses the stamping carriage downward. Since the part to be stamped fits tightly with the stamping carriage, the expansion suction space is a closed space at this time. The stamping carriage moves downward to drive the piston downward. The piston moves downward, reducing the air density in the expansion suction space and generating negative pressure, thereby causing the part to be stamped and the stamping carriage to adsorb each other. At the same time, the piston moves downward to discharge the air under the piston in the support cylinder through the second air hole. In addition, the downward movement of the stamping carriage deforms the first spring, so the size of the negative pressure is determined by the mass of the part to be stamped, the deformation force of the first spring, the size of the expansion suction space, and the amount of air entering the expansion suction space through the angular gap between the part to be stamped and the stamping carriage. The first spring deformation length is taken as the distance between the upper surface of the stamping slide and the upper surface of the lower mold. At this time, the part to be stamped is just placed on the surface formed by the stamping slide and the lower mold. When the gravity of the stamped part, the deformation force of the first spring, the negative pressure generated and the supporting force of the upper surface of the lower mold are balanced, the part to be stamped does not move downward, and the adsorption of the part to be stamped is completed.

[0015] Step 3, start the stamping cylinder to push the upper die to move downward to squeeze the part to be stamped. Since the movable support plate is tilted on the bottom plate, the upper die first presses the lower die to tilt upward, compressing the supporting elastic member, so that the upper die starts to stamp the part to be stamped from a part until the upper die covers the lower die, completing the stamping of the part to be stamped, reducing the stress concentration of the stamped part and improving the quality of the stamped part.

[0016] Step 4: The stamping cylinder returns and the upper mold moves upward to reset.

[0017] Step 5, open the solenoid valve, and the outside air enters the expansion suction space. The expansion suction space is equal to the outside air pressure, and the expansion suction space has no adsorption force on the stamping part.

[0018] Step 6: The conveying mechanism rises to release the stamped parts from the lower die, and the conveying mechanism returns to remove the stamped parts. This completes a stamping process.

[0019] Beneficial effects of the present invention: The present invention adopts a stamping stabilizing mechanism to adjust the air suction volume of the adsorption mechanism when the part to be stamped is placed. The adsorption mechanism is used to generate suction force according to the air suction volume, the mass of the part to be stamped and the action of the reset spring when the part to be stamped is placed, and the part to be stamped is adsorbed by the suction force. Through the mutual cooperation of the adsorption mechanism and the stamping stabilizing mechanism, the adsorption positioning of the stamping part is achieved, and the stress concentration is reduced during stamping, thereby improving the stamping quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 is a schematic diagram of the conveying structure of the present invention from a first viewing angle; Figure 3 is a schematic diagram of the conveying structure of the present invention from a second viewing angle; Figure 4 2. It is a schematic diagram of the three-dimensional structure of the lower mold; Figure 5 1 is a schematic diagram of the structure of the lower mold from a top view; Figure 6 yes Figure 5 AA cross-sectional structure diagram; Figure 7 yes Figure 6 A magnified schematic diagram of part B; In the figure: 1 is a bottom plate, 2 is a stamping bracket, 3 is a stamping cylinder, 4 is a movable rod, 5 is an upper mold, 10 is a lower mold, 11 is a movable support plate, 12 is a stamping slide plate, 13 is an air suction hole, 14 is a T-hole, 15 is a movable rod, 20 is a piston pad, 21 is a first air hole, 22 is a second air hole, 23 is a support cylinder, 24 is a first spring, 25 is a supporting elastic member, 26 is a third air hole, 51 is a conveying roller frame, 52 is a rubber roller, 53 is a conveying motor, 55 is a connecting frame, 56 is a limit plate, 101 is an exhaust pipe, 102 is a solenoid valve, 201 is a slide rail, 202 is a slider, and 401 is a lifting cylinder. DETAILED DESCRIPTION

[0021] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0022] A distribution box shell stamping equipment, such as Figure 1-7As shown, it includes a base plate 1, a stamping support 2, a stamping cylinder 3, an upper die 5, a lower die 10, an adsorption mechanism, a stamping stabilization mechanism and a conveying mechanism. The stamping support 2, the stamping stabilization mechanism and the conveying mechanism are installed on the base plate 1, the stamping cylinder 3 is installed on the stamping support 2, the upper die 5 is fixed on the action rod of the stamping cylinder 3, the upper die 5 is installed on the stamping stabilization mechanism, and the adsorption mechanism is installed on the upper die 5. The upper die 5 and the lower die 10 match each other, and the upper die 5 and the lower die 10 are arranged oppositely. The lower die 10 is located in the middle of the conveying mechanism.

[0023] like Figure 2-6 As shown, the top surface of the lower mold 10 is provided with more than two T-shaped holes 14, and the T-shaped holes 14 are arranged in rows and columns on the top surface of the lower mold 10. The adsorption mechanism includes more than two adsorption units, and the adsorption units are arranged one by one with the T-shaped holes 14. The top groove of the T-shaped hole 14 is a matching structure with the stamping carriage 12.

[0024] like Figure 2-6 As shown, the adsorption unit includes a stamping carriage 12, a support tube 15, a piston 20, and a support cylinder 23. The stamping carriage 12 is provided with an air suction hole 13. The top of the stamping carriage 12 is provided with a rubber layer, which makes the stamping carriage 12 and the stamping part more closely combined and improves the air tightness between them. The top of the support tube 15 extends out from the T-hole 14, the stamping carriage 12 is installed at the top of the support tube 15, and the air suction hole 13 is connected to the support tube 15. The bottom end of the support tube 15 extends into the support tube 23, and the support tube 15 is connected by sliding up and down in the support tube 23, and the piston 20 is installed at the bottom end of the support tube 15, and the support tube 15 and the support tube 23 are sealed by a sealing rubber ring. Specifically, the upper part of the support tube 23 is provided with a tube mouth, and the inner side of the tube mouth is provided with a sealing rubber ring. The bottom end of the support tube 15 passes through the sealing rubber ring and extends into the support tube 23, which realizes the sealing between the support tube 15 and the support tube 23 on the one hand, and realizes the support tube 15 sliding up and down in the support tube 23 on the other hand. The bottom of the support tube 15 is provided with a first air hole 21 that connects the support tube 15 with the support tube 23. Through the first air hole 21, the support tube 15 and the support tube 23 are connected to each other, and the gas flows to each other. The space formed by the piston 20, the support tube 15 and the upper part of the chamber of the support tube 23 is the expansion suction space. The bottom of the support tube 23 is provided with a second air hole 22 connected to the outside, the top of the support tube 23 is provided with a third air hole 26, the third air hole 26 is installed with an exhaust pipe 101, and the exhaust pipe 101 is provided with a solenoid valve 102; the first spring 24 is used to reset the support tube 15, such as Figure 6As shown, the first spring 24 is sleeved on the outside of the support tube 15, the upper end of the first spring 24 is fixedly connected to the top of the support tube 23, and the lower end is fixedly connected to the bottom of the support tube 15. When the support tube 15 moves downward under the gravity of the part to be stamped, the first spring 24 is stretched and deformed. When the solenoid valve is opened, the outside air enters the expansion suction space, so that the outside air pressure in the expansion suction space is equal. When the part to be stamped is removed, the first spring 24 shrinks and resets, driving the support tube 15 to move upward until it moves to the initial position. In another embodiment of the present invention, the first spring 24 is arranged in the support tube 23 and is located below the piston 20. When the support tube 15 moves downward under the gravity of the part to be stamped, the first spring 24 is compressed and deformed. When the solenoid valve is opened, the outside air enters the expansion suction space, so that the outside air pressure in the expansion suction space is equal. When the part to be stamped is removed, the first spring 24 stretches and resets, driving the support tube 15 to move upward until it moves to the initial position.

[0025] The stamping stabilization mechanism includes a movable support plate 11, a supporting elastic member 25, and a slider. The movable support plate 11 is tilted on the bottom plate 1. Since the lower mold 10 is installed on the movable support plate 11, and the upper surface of the lower mold 10 is parallel to the upper surface of the movable support plate 11, when the lower mold 10 is pressed downward, there is an error between the lower mold 10 and the upper mold 5 in the lateral direction. In order to prevent lateral stamping errors, the stamping parts of the present invention only perform stamping processes in the longitudinal direction, and the stamping in the lateral direction only needs to be turned 90 degrees to form stamping in the longitudinal direction. In another embodiment, the angle between the movable support plate 11 and the bottom plate 1 is 1°, and the stamping part is calculated based on the size of a power distribution box with a length, height and thickness of 1000x1600x500mm. In a 1000mm stamping part, when the angle is 1°, the deformation length of the supporting elastic member 25 is 17.455mm, and the error in the transverse direction of the stamping part is 0.552mm. At this angle, stamping in the transverse and longitudinal directions can be performed simultaneously, and the accuracy of the stamping part is within the allowable error range. In another embodiment, the angle between the movable support plate 11 and the bottom plate 1 is 2°. In a 1000mm stamping part, when the angle is 2°, the deformation length of the supporting elastic member 25 is 34.920mm, and the error in the transverse direction of the stamping part is 0.610mm. At this angle, stamping in the transverse and longitudinal directions can be performed simultaneously, and the accuracy of the stamping part is within the allowable error range. In another embodiment, the angle between the movable support plate 11 and the base plate 1 is 2°. In a 1000mm stamping part, when the angle is 2°, the deformation length of the supporting elastic member 25 is 8.727mm, and the error in the transverse direction of the stamping part is 0.038mm. At this angle, stamping in the transverse and longitudinal directions can be performed simultaneously, and the accuracy of the stamping part is within the allowable error range.

[0026] One end of the movable support plate 11 is rotatably connected to the bottom plate 1 through a rotating shaft, and the other end is provided with a slide rail, on which the slider is mounted, and the slider is slidably connected to the slide rail. The bottom end of the supporting elastic member 25 is fixedly connected to the bottom plate 1, and the top end is fixedly connected to the slider; the limit block is provided on the bottom plate 1 and is located near the supporting elastic member 25; the lower mold 10 is mounted on the movable support plate 11, and the upper surface of the lower mold 10 is parallel to the upper surface of the movable support plate 11. When the upper mold 5 is pressed downward, it first presses the part to be stamped, and the pressure is transmitted to the lower mold 10. The lower mold 10 transmits the pressure to the movable support plate 11. The upper oblique end of the movable support plate 11 is first subjected to force, so that the movable support plate 11 rotates downward around the axis. During the rotation, the slider slides on the slide rail in the direction of the axis. At the same time, the supporting elastic member 25 receives downward pressure and undergoes elastic deformation until the movable support plate 11 rotates downward and reaches the limit block, where it is resisted and no longer rotates downward. During the downward rotation of the movable support plate 11, the extrusion between the lower mold 10 and the upper mold 5 slowly stamps the contact part of the part to be stamped until the upper mold 5 completes its stroke and the stamping of the part to be stamped is completed. The upper mold 5 returns upward, and the supporting elastic member 25 is reset, driving the movable support plate 11 to rotate upward to the initial position. The supporting elastic member 25 can be a spring sheet or a spring, and an elastic member with suitable elastic properties can be selected according to the stamping force of the stamping part.

[0027] The conveying mechanism includes a conveying roller frame 51, a rubber roller 52, a conveying motor 53, and a limit assembly. The conveying roller frame 51 is arranged on both sides of the lower mold 10. The conveying roller frame 51 is provided with a rubber roller 52, and a sprocket is arranged on the rubber roller 52. The rubber roller 52 on each side of the conveying roller frame 51 is connected to the sprocket through a chain. The conveying motor 53 is connected to a rubber roller 52 (this rubber roller is an active rubber roller) on the conveying roller frame 51 on each side. The conveying motor 53 rotates forward to drive the active rubber roller to rotate. The rotation of the active rubber roller drives the sprocket on it to rotate. The rotation of the sprocket drives the chain to move. The movement of the chain drives the sprocket connected to it to rotate. The rotation of the sprocket connected to it drives the rubber roller 52 connected to it to rotate. The rotation of the rubber roller 52 realizes the conveyance of the parts to be stamped. During the return stroke, the motor can be reversed. The fixed end of the lifting cylinder 401 is fixedly connected to the movable support plate 11, the lifting end of the lifting cylinder 401 is fixedly connected to the limit assembly, and the conveying roller frame 51 is fixedly installed on the limit assembly. When the workpiece to be stamped is conveyed to the top of the lower mold 10, the lifting cylinder 401 is started to descend, and the workpiece to be stamped is placed above the lower mold 10. When the workpiece to be stamped is stamped, the lifting cylinder 401 is started to rise, and the workpiece to be stamped is detached from the lower mold 10 and moved out through the rubber roller 52. The conveying plane of the rubber roller 52 is parallel to the plane where the bottom plate 1 is located. Since the upper surface of the lower mold 10 is parallel to the upper surface of the movable support plate 11, and the movable support plate 11 is tilted on the bottom plate 1, the conveying plane of the rubber roller 52 has an inclination angle with the upper surface of the lower mold 10. In this way, when the part to be stamped is placed on the upper surface of the lower mold 10, there is an angle gap between the part to be stamped and the stamping carriage 12, and the outside air enters the expansion suction space through the angle gap; then the stamping part and the stamping carriage 12 fit each other, and the outside air cannot enter the expansion suction space at this time. Under the gravity of the stamping part, the stamping carriage 12 is driven to move downward, and the downward movement of the stamping carriage 12 drives the support tube 15 to move downward, and the downward movement of the support tube 15 drives the piston 20 to move downward. During the downward movement of the piston 20, on the one hand, the air below the piston 20 in the support cylinder 23 is discharged through the second air hole 22, and on the other hand, the downward movement of the piston 20 makes the expansion suction space larger, the air density is reduced, and the negative pressure is increased. Under the negative pressure of the expansion suction space, the stamping part and the stamping carriage 12 are negatively adsorbed together.

[0028] The limiting assembly includes a second spring, a connecting frame 55 and a positioning column, and the positioning column is fixed on the movable support plate 11. One end of the connecting frame 55 is fixed on the conveying roller frame 51, and the other end passes through the positioning column and is slidably connected with the positioning column. The second spring is sleeved on the positioning column, and the upper end of the second spring abuts against the connecting frame 55, and the lower end abuts against the movable support plate 11. The limiting assembly includes a limiting plate 56, and the limiting plate 56 is fixed on the movable support plate 11, and the limiting plate 56 is located around the connecting frame 55. By using the limiting assembly, the parts to be stamped are stable during the conveying process.

[0029] A method for stamping a distribution box shell, using the distribution box shell stamping equipment, comprises the following steps: Step 1: Place the workpiece to be stamped on the conveying mechanism. The conveying mechanism conveys the workpiece to be stamped to above the lower die 10.

[0030] Specifically, the workpiece to be stamped is placed on the conveying mechanism, the lifting cylinder 401 lifts the conveying roller frame 51, and the conveying motor 53 is started to drive the rubber roller 52 to rotate to realize the conveying of the workpiece to be stamped. When the workpiece to be stamped is conveyed to the top of the lower mold 10, the conveying motor 53 stops working.

[0031] Step 2, the conveying mechanism descends (the lifting cylinder 401 descends), and the part to be stamped is placed on the lower mold 10. At this time, since the movable support plate 11 is tilted on the bottom plate 1, when the part to be stamped is placed on the lower mold 10, there is an angle between the part to be stamped and the stamping carriage 12. Under the gravity of the part to be stamped, the part to be stamped presses the stamping carriage 12 to move downward. Since there is an angle between the part to be stamped and the lower mold 10, the space formed by the chamber of the piston 20, the support tube 15 and the upper part of the support cylinder 23 is the expansion suction space, and the air enters the support tube 15 from the angle gap between the part to be stamped and the stamping carriage 12, and enters the expansion suction space through the support tube 15. The stamping carriage 12 moves downward to deform the first spring 24. As the gravity of the part to be stamped acts, the part to be stamped moves downward against the stamping carriage 12 until the part to be stamped is completely parallel to the stamping carriage 12. At this time, the part to be stamped and the stamping carriage 12 are tightly fitted, and the outside air cannot enter the expansion suction space. The part to be stamped continues to move downward under the action of gravity, and the part to be stamped moves downward against the stamping carriage 12. Since the part to be stamped and the stamping carriage 12 are tightly fitted, the expansion suction space is a closed space at this time. The stamping carriage 12 moves downward to drive the piston 20 to move downward. The piston 20 moves downward, reducing the air density in the expansion suction space, generating negative pressure, and then causing the part to be stamped and the stamping carriage 12 to adsorb each other. At the same time, the piston 20 moves downward, and the air below the piston 20 in the support cylinder 23 is discharged through the second air hole 22. In addition, the stamping carriage 12 moves downward to deform the first spring 24, so the size of the negative pressure is determined by the mass of the part to be stamped, the deformation force of the first spring 24, the size of the expansion suction space, and the amount of air entering the expansion suction space through the angular gap between the part to be stamped and the stamping carriage 12. The deformation length of the first spring 24 is taken as the distance between the upper surface of the stamping carriage 12 and the upper surface of the lower mold 10. At this time, the part to be stamped is just placed on the surface formed by the stamping carriage 12 and the lower mold 10. When the gravity of the part to be stamped, the deformation force of the first spring 24, the negative pressure generated, and the supporting force of the upper surface of the lower mold 10 are balanced, the part to be stamped does not move downward, and the adsorption of the part to be stamped is completed.

[0032] The negative pressure is obtained by the following formula: ; in, Indicates negative pressure, Indicates the quality of the parts to be stamped. represents the acceleration due to gravity, represents the elastic constant of the first spring, Indicates the distance between the upper surface of the stamping slide and the upper surface of the lower die. Indicates the support force of the upper surface of the lower die on the stamping part. Indicates the number of adsorption units.

[0033] Step 3, start the stamping cylinder 3 to push the upper die 5 to move downward to squeeze the part to be stamped. Since the movable support plate 11 is tilted on the bottom plate 1, the upper die 5 first presses the lower die 10 to tilt upward, compressing the supporting elastic member 25, so that the upper die 5 starts to stamp the part to be stamped from a part until the upper die 5 covers the lower die 10, completing the stamping of the part to be stamped, reducing the stress concentration of the stamped part and improving the quality of the stamped part.

[0034] Step 4, the stamping cylinder 3 returns, and the upper mold 5 moves upward and resets.

[0035] Step 5, open the solenoid valve, and the outside air enters the expansion suction space. The expansion suction space is equal to the outside air pressure, and the expansion suction space has no adsorption force on the stamping part.

[0036] Step 6: The conveying mechanism rises to demould the stamped parts from the lower die 10, and the conveying mechanism returns to remove the stamped parts. This completes a stamping process.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A distribution box shell stamping equipment, characterized in that: The invention comprises a base plate (1), a stamping support (2), a stamping cylinder (3), an upper die (5), a lower die (10), an adsorption mechanism, a stamping stabilization mechanism and a conveying mechanism, wherein the stamping support (2), the stamping stabilization mechanism and the conveying mechanism are mounted on the base plate (1), the stamping cylinder (3) is mounted on the stamping support (2), the upper die (5) is fixed on the action rod of the stamping cylinder (3), the upper die (5) is mounted on the stamping stabilization mechanism, and the adsorption mechanism is mounted on the upper die (5); the upper die (5) and the lower die (10) match each other, and the upper die (5) and the lower die (10) are arranged relative to each other; the lower die (10) is located in the middle of the conveying mechanism; the stamping stabilization mechanism is used to adjust the suction volume of the adsorption mechanism when the part to be stamped is placed; the adsorption mechanism is used to generate suction force according to the suction volume, the mass of the part to be stamped and the action of a reset spring when the part to be stamped is placed, and the part to be stamped is adsorbed by the suction force.

2. According to claim 1, the punching equipment for the housing of the distribution box is characterized in that: The adsorption mechanism comprises more than two adsorption units; the adsorption unit comprises a stamping slide (12), a support tube (15), a piston (20), a support cylinder (23) and a first spring (24); an air suction hole (13) is arranged in the stamping slide (12); the top end of the support tube (15) extends from the T-shaped hole (14); the stamping slide (12) is mounted on the top end of the support tube (15); the air suction hole (13) is communicated with the support tube (15); the bottom end of the support tube (15) extends into the support cylinder (23); and the piston (20) is mounted on the support cylinder (23). The support tube (15) is mounted on the bottom end of the support tube (15), and the support tube (15) and the support tube (23) are sealed by a sealing rubber ring; the bottom of the support tube (15) is provided with a first air hole (21) for connecting the support tube (15) and the support tube (23); the bottom of the support tube (23) is provided with a second air hole (22) for connecting with the outside; the top of the support tube (23) is provided with a third air hole (26); an exhaust pipe is installed on the third air hole (26), and an electromagnetic valve is arranged on the exhaust pipe; the first spring (24) is used for resetting the support tube (15).

3. The distribution box housing stamping equipment according to claim 2 is characterized in that: The stamping stabilization mechanism comprises a movable support plate (11), a supporting elastic member (25), a limit block, and a slider (202); the movable support plate (11) is tiltedly arranged on the bottom plate (1), and one end of the movable support plate (11) is rotatably connected to the bottom plate (1) via a rotating shaft, and the other end is provided with a slide rail (201); the slide rail (202) is mounted on the slide rail (201), and the slide rail (202) is slidably connected to the slide rail (201); the bottom end of the supporting elastic member (25) is fixedly connected to the bottom plate (1), and the top end is fixedly connected to the slide rail (202); the limit block is arranged on the bottom plate (1) and is located near the supporting elastic member (25); the lower mold (10) is mounted on the movable support plate (11), and the upper surface of the lower mold (10) is parallel to the upper surface of the movable support plate (11).

4. The distribution box housing stamping equipment according to claim 3 is characterized in that: The conveying mechanism comprises a lifting cylinder (401), a conveying roller frame (51), a rubber roller (52), a conveying motor (53), and a limit assembly. The conveying roller frame (51) is arranged on both sides of the lower mold (10). The conveying roller frame (51) is provided with a rubber roller (52). A sprocket is arranged on the rubber roller (52). The rubber rollers (52) on each side of the conveying roller frame (51) are connected to the sprocket through a chain. The conveying motor (53) is connected to a rubber roller (52) on each side of the conveying roller frame (51). The fixed end of the lifting cylinder (401) is fixedly connected to the movable support plate (11). The lifting end of the lifting cylinder (401) is fixedly connected to the limit assembly. The conveying roller frame (51) is fixedly mounted on the limit assembly. The conveying plane of the rubber roller (52) is parallel to the plane where the bottom plate (1) is located.

5. The distribution box housing stamping equipment according to claim 4 is characterized in that: The top surface of the lower mold (10) is provided with more than two T-shaped holes (14), the T-shaped holes (14) are arranged in rows and columns on the top surface of the lower mold (10), and the adsorption units are arranged in a one-to-one correspondence with the T-shaped holes (14).

6. The distribution box housing stamping equipment according to claim 5, characterized in that: The limiting assembly comprises a second spring, a connecting frame (55) and a positioning column, wherein the positioning column is fixed on the movable support plate (11); one end of the connecting frame (55) is fixed on the conveying roller frame (51), and the other end passes through the positioning column and is slidably connected to the positioning column; the second spring is sleeved on the positioning column, and the upper end of the second spring abuts against the connecting frame (55), and the lower end abuts against the movable support plate (11).

7. The distribution box housing stamping equipment according to claim 6, characterized in that: The limiting assembly comprises a limiting plate (56), the limiting plate (56) being fixed on the movable support plate (11), and the limiting plate (56) being located around the connecting frame (55).

8. The distribution box housing stamping equipment according to claim 7, characterized in that: A rubber layer is provided on the top of the stamping slide (12).

9. The distribution box housing stamping equipment according to claim 8, characterized in that: The included angle between the movable support plate (11) and the bottom plate (1) is 0.5-2°.

10. A method for stamping a distribution box shell, characterized in that: The distribution box housing stamping equipment according to any one of claims 3 to 9 comprises the following steps: Step 1, placing the workpiece to be stamped on a conveying mechanism; the conveying mechanism conveys the workpiece to be stamped to above the lower die (10); Step 2, the conveying mechanism descends, and the workpiece to be stamped is placed on the lower mold (10). There is an angle between the workpiece to be stamped and the stamping slide (12). Under the gravity of the workpiece to be stamped, the workpiece to be stamped presses the stamping slide (12) and moves downward. The space formed by the chamber of the piston (20), the support tube (15) and the upper part of the support cylinder (23) is the expansion suction space. The air enters the support tube (15) from the angle gap between the workpiece to be stamped and the stamping slide (12), and the air enters the support tube (15) through the expansion suction space. The stamping slide (12) moves downward to deform the first spring (24); as the weight of the part to be stamped acts, the part to be stamped presses the stamping slide (12) and moves downward until the part to be stamped and the stamping slide (12) are completely parallel. At this time, the part to be stamped and the stamping slide (12) are tightly fitted, and external air cannot enter the expansion suction space; the part to be stamped continues to move downward under the action of gravity, and the part to be stamped presses the stamping slide (12) and moves downward. The stamping slide (12) moves downward. Since the workpiece to be stamped fits tightly with the stamping slide (12), the expansion suction space is a closed space. The stamping slide (12) moves downward, driving the piston (20) to move downward. The piston (20) moves downward, reducing the air density in the expansion suction space and generating negative pressure, thereby causing the workpiece to be stamped and the stamping slide (12) to be adsorbed to each other. At the same time, the piston (20) moves downward, and the air below the piston (20) in the support cylinder (23) is discharged through the second air hole (22). The deformation length of the first spring (24) is taken as the distance between the upper surface of the stamping slide (12) and the upper surface of the lower mold (10). At this time, the workpiece to be stamped is just placed on the surface formed by the stamping slide (12) and the lower mold (10). When the gravity of the workpiece to be stamped, the deformation force of the first spring (24), the generated negative pressure and the supporting force of the upper surface of the lower mold (10) are balanced, the workpiece to be stamped does not move downward, and the adsorption of the workpiece to be stamped is completed. Step 3, starting the stamping cylinder (3) to push the upper die (5) to move downward to squeeze the workpiece to be stamped; since the movable support plate (11) is tiltedly arranged on the bottom plate (1), the upper die (5) first presses the lower die (10) tilted upward, compressing the supporting elastic member (25), so that the upper die (5) starts to stamp the workpiece to be stamped from a part until the upper die (5) covers the lower die (10), thereby completing the stamping of the workpiece to be stamped; Step 4, the stamping cylinder (3) returns, and the upper die (5) moves upward and resets; Step 5, open the solenoid valve, and the outside air enters the expansion suction space. The pressure of the expansion suction space is equal to that of the outside air, and the expansion suction space has no adsorption force on the stamping part; Step 6, the conveying mechanism rises to demould the stamped part from the lower die (10), and the conveying mechanism returns to remove the stamped part; thus completing one stamping process.

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