Shielding cover bending device

Abstract

The invention relates to the technical field of shielding cover bending, in particular to a shielding cover bending device which comprises a machine base, the machine base is provided with an operation platform, the operation platform is defined to be located on the left side of the machine base, a bending plate is arranged on the left side of the operation platform, and a rotating motor is arranged on one side of the bending plate. The adsorption structure comprises a plurality of negative pressure holes and suction equipment for applying negative pressure to the negative pressure holes; the pressing structure comprises a plurality of pressing single plates, the right end of each pressing single plate is hinged to the machine base, and the right end of each pressing single plate is connected with the hinge part through a reset torsion spring. The pressing structure further comprises a plurality of pull-down pieces, the channels where the pull-down pieces are located communicate with the negative pressure channels corresponding to the negative pressure holes, so that the pull-down pieces corresponding to the negative pressure holes adsorbing the workpieces can pull the corresponding pressing single plates to move downwards under negative pressure suction, and the workpieces are pressed. The technical problem that in the prior art, when shielding covers of different specifications are bent, molds need to be replaced frequently, and consequently the bending efficiency is low is solved.

Description

Technical Field

[0001] The invention relates to the technical field of shielding cover bending, and in particular to a shielding cover bending device. Background Art

[0002] A shielding cover is a metal shell used for electromagnetic shielding, mainly used to reduce the impact of electromagnetic interference and electromagnetic radiation. It is usually used in electronic devices such as mobile phones, televisions, computers, etc. to protect internal circuits and components from external electromagnetic interference, and also prevent internal electromagnetic radiation from leaking into the external environment. The shielding cover bending equipment uses a bending die to bend the shielding cover on the basis of stamping. Parameters such as the bending angle and bending radius need to be adjusted according to specific design requirements to complete the production of the shielding cover. The existing mobile phone shielding cover is obtained by semi-automatic processing, and the processing method is as follows: the worker places one side of the shielding cover to be bent on the lower die through a calibration plate, and starts the machine to press the upper die knife block down to complete the bending of one side of the shielding cover.

[0003] For example, a Chinese patent document with authorization announcement number CN216828276U discloses a bending and forming device for a PCB circuit board shielding cover. The device sets mutually matching protrusion structures on the upper and lower molds to enable the material to be stamped and formed during the stamping process of the upper and lower molds, and sets side bending blocks around the lower mold to enable the workpiece to complete secondary bending through one stamping, thereby achieving one-time forming of the workpiece folding edge and buckle position, thereby improving the production efficiency of the shielding cover.

[0004] However, the above-mentioned device still has certain shortcomings when in use: 1. The mold described in the device can only complete the bending operation of one specification of shielding cover at a time. When bending shielding covers of different specifications, the operator is required to frequently replace the bending mold, which increases the labor intensity and reduces the bending efficiency of the shielding cover; 2. The shielding cover is bent manually and semi-automatically. When the shielding cover is placed, the folded edge of the shielding cover may not be parallel to the side of the bending mold, which causes the folded edge to be skewed, reducing the pass rate of the bending process.

[0005] Therefore, there is a need for a shield cover bending device that can complete the bending operation of shield covers of various specifications without changing the mold, and can avoid the occurrence of skewed shield cover folding edges. Summary of the invention

[0006] The present invention provides a shielding cover bending device to solve the technical problem in the prior art that bending dies need to be frequently replaced when bending shielding covers of different specifications, resulting in low bending efficiency.

[0007] In order to solve the above problems, the present invention provides a shielding cover bending device adopting the following technical solutions: A shield cover bending device, comprising a machine base, which has an operating platform for placing a workpiece, wherein the operating platform is defined to be located on the left side of the machine base, and the left side of the operating platform has a bending plate, and the front side or the rear side of the bending plate has a rotating motor for driving the bending plate to flip back and forth to bend the workpiece, and also includes an adsorption structure for adsorbing the workpiece from below the workpiece after the workpiece is placed, and a pressing structure for pressing the workpiece from above the workpiece; The adsorption structure includes a plurality of negative pressure holes arranged along the front-to-back direction on the operating platform, and workpieces of different sizes can block different numbers of negative pressure holes when placed. The adsorption structure also includes a suction device for applying negative pressure to the negative pressure holes, and the negative pressure holes blocked by the workpiece can adsorb the workpiece on the operating platform; The clamping structure includes a plurality of clamping plates arranged in the front-to-back direction, the right end of each clamping plate is hinged on the machine base, and the right end of each clamping plate is connected to the hinge part through a reset torsion spring; The clamping structure also includes multiple pull-down members located in the machine base and connected to the clamping plates. The channel in which each pull-down member is located is connected to the negative pressure channel corresponding to the negative pressure hole, so that the pull-down member corresponding to the negative pressure hole that adsorbs the workpiece can pull the corresponding clamping plate downward under negative pressure suction to clamp the workpiece.

[0008] The beneficial effect is that: by setting the mold as an adaptive mold composed of a plurality of clamping single plates in parallel, the shielding cover bending device can adjust the width of the mold by controlling the number of actions of clamping the single plate, thereby eliminating the need to replace the mold and improving the applicability of the shielding cover bending device. The setting of the lower pull rod and the negative pressure channel enables the bending device to automatically adjust the number of actions of the clamping single plate according to the number of negative pressure holes blocked by the workpiece, thereby enabling the shielding cover bending device to automatically adjust the mold size according to the size of the workpiece without the need for additional control by the operator, thereby reducing the labor intensity of the operator and improving the bending efficiency of the shielding cover bending process.

[0009] Furthermore, the pull-down member is a pull-down rod, and the base is provided with pull-down grooves corresponding to each pull-down rod, the pull-down grooves are connected to the negative pressure channel, and the unit also has a main channel connected to the negative pressure channel, and the suction device provides negative pressure through the main channel.

[0010] Furthermore, the upper end of the lower pull rod is hinged to the pressing single plate to accommodate the rotation of the pressing single plate along the machine base.

[0011] Furthermore, a pull rod spring is provided at the lower end of the lower pull rod, and the pull rod spring is used to reset the lower pull rod after completing the pressing action.

[0012] The beneficial effect is that the setting of the pull rod spring enables the lower pull rod to automatically reset after the workpiece is bent, thereby improving the automation level of the equipment.

[0013] Furthermore, the negative pressure channels are interconnected, so that one main channel is connected to the negative pressure channels of multiple negative pressure holes.

[0014] Furthermore, the lower end of each of the pull-down rods has a circumferentially extending annular groove, and a balance channel connected to the atmospheric pressure is provided in the machine base on the right side of each pull-down groove. The annular groove has a balance position for balancing the atmospheric pressure that is connected to both the negative pressure channel and the balance channel when the pull-down rod moves downward.

[0015] The beneficial effect is that the setting of the annular groove ensures that when the pull-down rod needs to be reset, it will not be blocked by the residual negative pressure in the negative pressure channel, making the reset of the pull-down rod smoother and more reliable, avoiding the jamming or damage of the equipment due to air pressure imbalance.

[0016] Furthermore, the operating platform is provided with a centering component for centering the workpiece, which includes a slide groove extending forward and backward located on the right side of the negative pressure hole, and two centering block structures are arranged in the slide groove in front and back directions. The centering block structure includes a sliding base, and springs extending forward and backward are arranged on opposite sides of the two sliding bases. A clamping block is fixed at one end of the spring away from the sliding base. The centering component also includes a driving structure for driving the two sliding seats to move relative to each other to center and clamp the workpiece.

[0017] Furthermore, the driving structure includes a hydraulic cavity located below the slide groove and extending forward and backward in the machine base, and two sliders corresponding to the two sliding bases are arranged in the hydraulic cavity, and the two sliders and the two sliding bases are made of magnetic materials so that the sliders and the corresponding sliding bases move synchronously; The two slide blocks are in a centering state when hydraulic oil is filled into the hydraulic cavity, driving the two sliding bases to approach each other. In the centering state, the workpiece on the operating platform is center-clamped by the two clamping blocks.

[0018] Furthermore, a hydraulic oil channel corresponding to the hydraulic cavity is provided in the machine base, and a mobile cavity connected to the hydraulic oil channel is provided on the left side of the lower pull rod. A hydraulic plate adapted to each mobile cavity is fixedly connected to the left side of each lower pull rod. The hydraulic plate has a non-extrusion state located on the upper cavity wall of the mobile cavity when the lower pull rod is in an initial position, and an extrusion state in which it moves downward to squeeze the hydraulic oil when the lower pull rod moves downward.

[0019] The beneficial effect is that the setting of the centering component enables the workpiece to be automatically centered by clamping the two centering block structures while being placed on the operating platform, which can effectively avoid the problem of folding edge deviation caused by skewed placement of the workpiece and improve the bending quality of the workpiece.

[0020] Furthermore, the clamping plate is a wedge-shaped plate extending left and right, and both upper and lower sides of its left end have two inclined surfaces inclined from top to bottom to the left, and the two inclined surfaces extend to a vertical end surface to form a clamping end to avoid damage to the workpiece when the clamping plate is pressed down.

[0021] The beneficial effect is that the arrangement of the clamping end enables the clamping structure to avoid collision with other folded edges of the workpiece when clamping the workpiece, thereby improving the applicability of the bending device.

[0022] The beneficial effects of the shielding cover bending device provided by the present invention are: 1. By setting the mold as an adaptive mold composed of multiple single plates in parallel, the shield cover bending device can adjust the width of the mold by controlling the number of actions of the single plate, so that there is no need to replace the mold, which improves the applicability of the shield cover bending device. The setting of the lower pull rod and the negative pressure channel enables the bending device to automatically adjust the number of actions of the single plate according to the number of negative pressure holes blocked by the workpiece, and then enables the shield cover bending device to automatically adjust the mold size according to the size of the workpiece without the need for additional control by the operator, which reduces the labor intensity of the operator and improves the bending efficiency of the shield cover bending process.

[0023] 2. The setting of the pull rod spring enables the lower pull rod to automatically reset after the workpiece is bent, which improves the automation level of the equipment.

[0024] 3. The setting of the annular groove ensures that when the pull-down rod needs to be reset, it will not be blocked by the residual negative pressure in the negative pressure channel, making the reset of the pull-down rod more stable and reliable, avoiding the jamming or damage of the equipment due to air pressure imbalance.

[0025] 4. The setting of the spring enables the sliding base to have a certain displacement capacity to continue to move in opposite directions when the two clamps clamp the workpiece, avoiding the situation where the sliding base is out of attraction due to the excessive distance between the sliding base and the corresponding slider, and improving the stability of the centering component.

[0026] 5. The setting of the centering component enables the workpiece to be automatically centered by clamping the two centering block structures while being placed on the operating platform. This can effectively avoid the problem of folding edge deviation caused by skewed placement of the workpiece and improve the bending quality of the workpiece.

[0027] 6. The setting of the clamping end enables the clamping structure to avoid collision with other folded edges of the workpiece when clamping the workpiece, thereby improving the applicability of the bending equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An overall structural diagram of a shield cover bending device provided by the present invention; Figure 2 for Figure 1 A partial cross-sectional view of the middle compression structure; Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A; Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in the middle; Figure 5 for Figure 2 A partial enlarged schematic diagram of point C in the middle; Figure 6 It is a structural schematic diagram of the centering component; Figure 7 for Figure 6 A partial enlarged schematic diagram of point D in the middle; Figure 8 It is a schematic diagram of the cooperation between the centering block structure and the workpiece; Fig. 9 is a structural schematic diagram of the lower pull rod; Fig.10 It is a structural schematic diagram of the centering block structure; Fig.11 A schematic diagram of the process of bending a workpiece by the shielding cover bending device provided by the present invention; Fig.12 A schematic diagram of a process of releasing a workpiece by the shielding cover bending device provided by the present invention; Fig.13 Schematic diagram of the bending state of the workpiece.

[0029] Description of reference numerals: 1. Machine base; 11. Rotating motor; 12. Operating platform; 13. Button 1; 14. Button 2; 15. Support shaft; 16. Adsorption structure; 17. Negative pressure hole; 18. Workpiece; 2. Clamping structure; 21. Clamping single board; 211. Clamping end; 212. Reset torsion spring; 22. Avoidance groove; 23. Lower pull rod; 231. Articulated shaft; 232. Annular groove; 233. Pull rod spring; 234. Negative pressure channel; 235. Main channel; 236. Lower pull groove; 237. Balance channel; 3. Bending mechanism; 31. Bending plate; 32. Fixed shaft; 33. Fixed groove; 34. Bending block; 4. Centering assembly; 41. Hydraulic plate; 42. Hydraulic oil channel; 43. Hydraulic cavity; 44. Moving cavity; 45. Slider; 46. Slide groove; 462. Centering block structure; 463. Sliding base; 464. Spring; 465. Clamp; 47. Driving structure. DETAILED DESCRIPTION

[0030] The main idea of ​​the present invention is to decompose the mold into multiple clamping single plates 21 so that the equipment can adjust the width of the mold by controlling the number of actions of the clamping single plate 21. The setting of the lower pull rod 23 and the negative pressure channel 234 enables the bending device to automatically adjust the number of actions of the clamping single plate 21 according to the number of negative pressure holes 17 blocked by the workpiece 18, and then enable the bending device to automatically adjust the mold size according to the size of the workpiece 18, thereby avoiding the situation where the bending mold needs to be frequently replaced due to different specifications of the workpiece 18, thereby improving the efficiency of the bending process.

[0031] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0032] A shielding cover is a tool used to shield electronic signals. Its main function is to prevent external electric, magnetic or electromagnetic fields from interfering with internal devices, or to prevent the electromagnetic field of the device from affecting the outside world. The working principle of the shielding cover is based on the Faraday cage effect. When an external electric field passes through the shielding cover, a space electric field with a high electric field intensity is formed inside the shielding cover, while a lower space electric field is formed outside the shielding cover. In this way, the external electric field cannot enter the internal circuit through the shielding cover, thus achieving electromagnetic shielding.

[0033] Shielding covers are usually made of metal sheets and are bent into shape by bending equipment according to different specifications and sizes. The bending accuracy of the shielding cover directly affects its fit with the internal components of the electronic equipment and the shielding effect. Therefore, during the bending process, it is necessary to strictly control parameters such as the bending angle and bending radius to ensure that the accuracy of the shielding cover meets the requirements. In addition, the design of the mold also directly affects the molding quality and processing efficiency of the shielding cover. It is necessary to customize and select appropriate molds according to specific design requirements, and ensure the accuracy and durability of the mold.

[0034] The shield cover bending equipment generally includes a frame, a workbench, a bending mechanism 3, a power system, a control system, etc. The bending mechanism 3 includes a bending die, a bending arm, etc., which are used to bend the shield cover. The design of the bending mechanism 3 is generally customized according to the shape and size of the workpiece 18.

[0035] When bending the shielding cover, the operator needs to place the shielding cover to be processed on the workbench, and then accurately adjust the position of the workpiece 18 through the positioning device to ensure that the relative position between the workpiece 18 and the mold is accurate, and then control the bending mechanism 3 to fix the workpiece 18 and bend the corresponding edges of the workpiece 18. After the bending is completed, the workpiece 18 is taken out from the workbench.

[0036] However, existing bending equipment can often only perform bending operations on shielding covers of one specification during operation. When bending operations are required on shielding covers of different specifications, the bending mold of the corresponding size needs to be replaced. The equipment itself cannot adjust the size of the mold or replace the corresponding mold according to the specifications of the workpiece 18. This undoubtedly reduces the production efficiency of the shielding cover bending process and also increases the labor intensity of the operators.

[0037] In addition, there is a certain degree of inaccuracy in manually adjusting the position of the workpiece 18 using a positioning device. Often, due to human error, the folded edge of the workpiece 18 may not be parallel to the side of the bending mold, which in turn causes the folded edge of the workpiece 18 to be skewed, thereby reducing the yield rate of the shielding cover production. Therefore, it is necessary to design a bending device that can automatically adjust the size of the bending mold according to the size of the workpiece 18.

[0038] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0039] Embodiment 1 of a shield cover bending device provided by the present invention: like Figures 1 to 13 As shown, the shield cover bending device mainly includes a machine base 1, a clamping structure 2, an adsorption structure 16, a bending mechanism 3 and a centering component 4. The machine base 1 is a carrier of the shield cover bending device. The machine base 1 is provided with an operating platform 12, and the operating platform 12 is defined as being located on the left side of the machine base 1. A workpiece 18 is provided on the operating platform 12. The clamping structure 2 is located above the operating platform 12, and the clamping structure 2 is used to clamp the workpiece 18. The adsorption structure 16 is located on the operating platform 12 and below the workpiece 18, and the adsorption structure 16 is used to adsorb the workpiece 18 on the operating platform 12. The bending mechanism 3 is located on the left side of the operating platform 12, and the bending mechanism 3 is used to bend the workpiece 18. The centering component 4 is located on the operating platform 12, and is used to center the position of the workpiece 18.

[0040] First, the adsorption structure 16 is introduced, such as Figure 7 As shown, the adsorption structure 16 includes a plurality of negative pressure holes 17 located on the operating platform 12, and each negative pressure hole 17 is arranged in the front-to-back direction. When the workpiece 18 is placed on the operating platform 12, workpieces 18 of different sizes can block different numbers of negative pressure holes 17. The adsorption structure 16 also includes a suction device (not shown in the figure) located outside the machine base 1, and the suction device (not shown in the figure) is used to apply negative pressure to the negative pressure hole 17 so that the negative pressure hole 17 adsorbs the workpiece 18 on the operating platform 12.

[0041] Then introduce the compression structure 2, such as Figure 2As shown, the clamping structure 2 includes a plurality of clamping plates 21 located above the operating platform 12, and the plurality of clamping plates 21 are arranged adjacent to each other in the front-to-back direction. The clamping plate 21 is a wedge-shaped plate extending left and right, and the upper and lower sides of the left end of the clamping plate 21 have two inclined surfaces, both inclined surfaces are inclined from top to bottom to the left, and the two inclined surfaces extend to a vertical end surface to form a clamping end 211, and the clamping end 211 is used to clamp the workpiece 18. In the process of pressing the clamping plate 21 downward, since the lower side surface of the clamping plate 21 is an inclined surface inclined from top to bottom to the left, the clamping end 211 of the clamping plate 21 can clamp the workpiece 18 without touching other folded edges of the workpiece 18, thereby improving the applicability of the shielding cover bending device.

[0042] like Figure 2 and Figure 3 As shown, a support shaft 15 extending forward and backward is provided on the machine base 1 and on the right side of the operating platform 12. The right end of each clamping plate 21 is hinged on the support shaft 15. A reset torsion spring 212 is provided between the support shaft 15 and each clamping plate 21 so that each clamping plate 21 can automatically reset after completing the bending of the workpiece 18.

[0043] In addition, if Figure 2 , Figure 4 and Fig. 9 As shown, the clamping structure 2 also includes a pull-down rod 23 located below each clamping single plate 21. The pull-down rod 23 is a cylindrical rod extending up and down, and the lower end of the pull-down rod 23 is located in the machine base 1. The machine base 1 is provided with a pull-down groove 236 corresponding to each pull-down rod 23, and the lower end of each negative pressure hole 17 is provided with a negative pressure channel 234 for transmitting negative pressure to the negative pressure hole 17. A main channel 235 is provided in the machine base 1 below the multiple negative pressure channels 234. The main channel 235 is connected to the suction device, and each of the negative pressure channels 234 is connected to each other, so that the main channel 235 is connected to each negative pressure channel 234.

[0044] Each pull-down groove 236 is connected to the negative pressure channel 234 corresponding to the negative pressure hole 17, so that the pull-down rod 23 corresponding to the negative pressure hole 17 for adsorbing the workpiece 18 can move downward under the negative pressure suction. A pull rod spring 233 is provided in each pull-down groove 236, which is located at the lower end of the pull-down rod 23, and the pull rod spring 233 is used to reset the pull-down rod 23 after completing the downward movement.

[0045] The upper end of the lower pull rod 23 has a hinge shaft 231 extending forward and backward, and the lower end of each of the clamping single plates 21 has a rectangular avoidance groove 22. The hinge shaft 231 is hinged on the side walls on the front and rear sides of the avoidance groove 22 to accommodate the rotation of the clamping single plate 21 along the support shaft 15.

[0046] like Figure 2 and Figure 5As shown, the right side of each of the pull-down grooves 236 is provided with a balance channel 237 connected to the atmospheric pressure, and the balance channel 237 is located in the machine base 1. The lower end of each pull-down rod 23 is provided with a circumferentially extending annular groove 232. In the process of the pull-down rod 23 moving downward, the corresponding clamping plate 21 moves downward at the same time. When the annular groove 232 connects the negative pressure channel 234 and the balance channel 237, the clamping plate 21 can clamp the workpiece 18 at this time, and the pull-down rod 23 is in a balanced position under the negative pressure of the pipeline and the pushing action of the pull rod spring 233. When the suction device stops providing negative pressure into the negative pressure pipeline 234, the balance channel 237 and the annular groove 232 can reduce the influence of the residual negative pressure in the negative pressure pipeline 234 on the upward movement of the pull-down rod 23, so that the pull-down rod 23 is quickly reset under the action of the pull rod spring 233.

[0047] Then introduce the centering component 4, such as Figure 2 , Figure 6 and Fig.10 As shown, the centering assembly 4 includes a rectangular slide 46 located on the right side of the negative pressure hole 17, the slide 46 extends in the front-to-back direction, and two centering block structures 462 are slidably arranged in the slide 46. The centering block structure 462 includes an L-shaped sliding base 463, and springs 464 extending forward and backward are arranged on opposite sides of the two sliding bases 463, and a rectangular clamping block 465 is fixedly arranged on the side of the spring 464 away from the sliding base 463, and the two clamping blocks 465 are used to push the workpiece 18 to the opposite side under the action of the spring 464.

[0048] The centering assembly 4 further includes a driving structure 47 located in the machine base 1 , and the driving structure 47 is used to drive the two sliding bases 463 to move relative to each other so as to center and clamp the workpiece 18 .

[0049] like Figure 6 and Figure 7 As shown, the driving structure 47 includes a rectangular hydraulic cavity 43 located below the slide slot 46. The hydraulic cavity 43 is located in the machine base 1 and extends in the front-to-back direction. Two sliders 45 are provided in the hydraulic cavity 43 corresponding to the two sliding bases 463. The two sliders 45 and the two sliding bases 463 are made of magnetic materials. When the two sliders 45 move forward and backward, they can respectively drive the corresponding sliding bases 463 to move forward and backward. The middle part of the hydraulic cavity 43 is connected to the atmospheric pressure. When the two sliders 45 in the hydraulic cavity 43 move in opposite or reverse directions, the air pressure in the hydraulic cavity 43 can be prevented from affecting the movement of the two sliders 45.

[0050] When hydraulic oil is filled into the hydraulic cavity 43 from the front and rear ends, the two sliders 45 approach each other under the pushing action of the hydraulic oil. At this time, the two sliding bases 463 also approach each other under the attraction of the corresponding sliders 45. At this time, the workpiece 18 located on the operating platform 12 is clamped in the center under the pushing of the two clamping blocks 465. The spring 464 is used to enable the sliding base 463 to have a certain displacement capacity to continue moving when the two clamping blocks 465 clamp the workpiece 18, thereby avoiding the sliding base 463 from loosening due to the large distance between the sliding base 463 and the corresponding slider 45, thereby improving the stability of the centering component 4.

[0051] like Figure 2 , Figure 4 and Figure 6 As shown, the base 1 is also provided with a hydraulic oil passage 42 connected to the front and rear ends of the hydraulic cavity 43, and a rectangular moving cavity 44 is provided on the left side of each of the lower pull rods 23, and the bottom of each moving cavity 44 is connected to the hydraulic oil passage 42. A hydraulic plate 41 is fixedly connected to the left side of each of the lower pull rods 23, and each hydraulic plate 41 is adapted to the corresponding moving cavity 44. When the hydraulic plate 41 is located at the upper cavity wall of the corresponding moving cavity 44, the two sliders 45 are in a state of being separated; when the hydraulic plate 41 moves downward, the hydraulic oil in the hydraulic oil passage 42 moves into the hydraulic cavity 43 through the hydraulic oil passage 42 under the squeezing action of the hydraulic plate 41, and the two sliders 45 are in a moving state of approaching each other under the squeezing action of the hydraulic oil on the front and rear sides of the hydraulic cavity 43.

[0052] Then introduce the bending mechanism 3, such as Figure 1 As shown, the bending mechanism 3 includes a rectangular bending plate 31 located on the left side of the operating platform 12, and the bending plate 31 extends in the front-to-back direction. The front and rear ends of the bending plate 31 are provided with fixed shafts 32, and the fixed shafts 32 are provided with fixed grooves 33 for fixing the bending plate 31. A bending block 34 for pushing the workpiece 18 is fixedly provided in the middle of the bending plate 31, and the rear end of the fixed shaft 32 on the rear side is provided with a rotating motor 11 for driving the bending plate 31 to flip back and forth to bend the workpiece 18. The front end of the machine base 1 is provided with a button 13 for controlling the rotating motor 11, and the rear end of the machine base 1 is provided with a button 2 14 for controlling the external suction device to control the bending device to complete the bending of the workpiece 18.

[0053] The working principle of the shielding cover bending device is as follows: like Figures 11 to 13As shown, first, the workpiece 18 to be bent is placed on the operating platform 12, and then the suction device located outside the machine base 1 is started through the button 2 14 on the machine base 1, and the suction device transmits the suction force to each negative pressure hole 17 and each lower pull groove 236 through the main channel 235 and each negative pressure channel 234. Then, the lower pull rod 23 in the lower pull groove 236 corresponding to the negative pressure hole 17 blocked by the workpiece 18 moves downward under the action of the suction force, and the lower pull rod 23 moves downward so that the pull rod spring 233 is compressed.

[0054] During the downward movement of the lower tie rod 23, the hydraulic plate 41 located on the left side of the lower tie rod 23 moves downward from the upper cavity wall of the movable cavity 44, and squeezes the hydraulic oil in the corresponding movable cavity 44 and the hydraulic oil channel 42, so that the two sliders 45 located at the front and rear ends of the hydraulic cavity 43 move in opposite directions under the squeeze of the hydraulic oil. Then, the two sliders 45 drive the two centering block structures 462 to move in opposite directions respectively through the magnetic attraction between the two sliders 45 and the corresponding sliding bases 463, and the workpiece 18 is clamped by the two centering block structures 462 to complete the position alignment.

[0055] In addition, during the downward movement of the lower pull rod 23, the corresponding pressing plate 21 of the lower pull rod 23 rotates downward around the support shaft 15 driven by the hinge shaft 231 at the upper end of the lower pull rod 23, and the return torsion spring 212 at the right end of the corresponding pressing plate 21 is compressed. When the pressing end 211 of the pressing plate 21 presses the workpiece 18, the lower pull rod 23 stops moving downward, and the annular groove 232 at the lower end of the lower pull rod 23 is connected to the corresponding negative pressure channel 234 and the balance channel 237.

[0056] Then, the rotary motor 11 is started by the button 13 on the base 1, and the rotary motor 11 drives the bending plate 31 in the vertical state to rotate upward, and the bending plate 31 rotates upward to the horizontal position, and then the rotary motor 11 drives the bending plate 31 to rotate downward to reset. In the process of the bending plate 31 rotating upward, the folded edge of the workpiece 18 is bent upward under the push of the bending block 34, and the bending operation of the workpiece 18 is completed. Then, the suction device is controlled to be closed by the button 13 on the base 1, at which time the negative pressure in the negative pressure hole 17, the negative pressure channel 234 and the lower pull groove 236 gradually weakens to disappear, and the lower pull rod 23 moves upward to reset under the push of the pull rod spring 233.

[0057] During the upward movement of the lower pull rod 23, the annular groove 232 on the lower pull rod 23 is connected to the atmospheric pressure through the balance channel 237, eliminating the influence of the residual negative pressure in the negative pressure channel 234 on the upward movement of the lower pull rod 23, so that the lower pull rod 23 can be quickly reset. In addition, during the upward movement of the lower pull rod 23, the hydraulic plate 41 in the corresponding moving cavity 44 is driven to move upward, and the hydraulic oil in the hydraulic cavity 43 and the hydraulic oil channel 42 is squeezed into the moving cavity 44 under the action of atmospheric pressure. At this time, the slider 45 in the hydraulic cavity 43 is reset to the front and rear ends of the hydraulic cavity 43, and the two sliders 45 drive the corresponding centering block structure 462 to reset to the front and rear ends of the slide groove 46 during the forward and backward movement.

[0058] Finally, under the action of the reset torsion spring 212 , the corresponding clamping single plate 21 is rotated upward and reset. At this time, the operator can take out the workpiece 18 and perform the bending operation of the next workpiece 18 .

[0059] Embodiment 2 of a shield cover bending device provided by the present invention: The main difference between it and Example 1 is: In Embodiment 1, the rotating electric machine is located at the rear side of the machine base.

[0060] In this embodiment, the rotating motor is located at the front side of the machine base or at other locations.

[0061] Embodiment 3 of a shield cover bending device provided by the present invention: The main difference between it and Example 1 is: In Example 1, the sliding block and the corresponding sliding base move synchronously through magnetic attraction.

[0062] In this embodiment, the sliding block and the corresponding sliding base are fixedly connected via a connecting rod structure to achieve synchronous movement.

[0063] Embodiment 4 of a shield cover bending device provided by the present invention: The main difference between it and Example 1 is: In Example 1, the clamping plate is a wedge-shaped block, and the left end of the clamping plate has a clamping end for clamping the workpiece.

[0064] In this embodiment, the pressing plate is a rectangular block, and the left end of the pressing plate has a rectangular pressing head extending up and down.

[0065] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

Claims

1. A shield cover bending device, comprising a machine base, which has an operating platform for placing a workpiece, wherein the operating platform is defined to be located on the left side of the machine base, and the left side of the operating platform has a bending plate, and the front side or the rear side of the bending plate has a rotating motor for driving the bending plate to reciprocate and flip to bend the workpiece, characterized in that: It also includes a suction structure for sucking the workpiece from below the workpiece after the workpiece is placed, and a pressing structure for pressing the workpiece from above the workpiece; The adsorption structure includes a plurality of negative pressure holes arranged along the front-to-back direction on the operating platform, and workpieces of different sizes can block different numbers of negative pressure holes when placed. The adsorption structure also includes a suction device for applying negative pressure to the negative pressure holes, and the negative pressure holes blocked by the workpiece can adsorb the workpiece on the operating platform; The clamping structure includes a plurality of clamping plates arranged in the front-to-back direction, the right end of each clamping plate is hinged on the machine base, and the right end of each clamping plate is connected to the hinge part through a reset torsion spring; The clamping structure also includes multiple pull-down members located in the machine base and connected to the clamping plates. The channel in which each pull-down member is located is connected to the negative pressure channel corresponding to the negative pressure hole, so that the pull-down member corresponding to the negative pressure hole that adsorbs the workpiece can pull the corresponding clamping plate downward under negative pressure suction to clamp the workpiece.

2. The shielding cover bending device according to claim 1, characterized in that: The pull-down member is a pull-down rod, and the base is provided with pull-down grooves corresponding to each pull-down rod, the pull-down grooves are connected to the negative pressure channel, and the unit is also provided with a main channel connected to the negative pressure channel, and the suction device provides negative pressure through the main channel.

3. The shielding cover bending device according to claim 2, characterized in that: The upper end of the lower pull rod is hinged to the pressing single plate to adapt to the rotation of the pressing single plate along the machine base.

4. The shielding cover bending device according to claim 2 or 3, characterized in that: A pull rod spring is provided at the lower end of the lower pull rod, and the pull rod spring is used to reset the lower pull rod after completing the pressing action.

5. The shielding cover bending device according to claim 2 or 3, characterized in that: The negative pressure channels are connected to each other, so that one main channel is connected to the negative pressure channels of multiple negative pressure holes.

6. The shielding cover bending device according to claim 2, characterized in that: The lower end of each of the pull-down rods has a circumferentially extending annular groove, and a balance channel connected to the atmospheric pressure is provided in the machine base on the right side of each pull-down groove. The annular groove has a balance position for balancing the atmospheric pressure that is connected to both the negative pressure channel and the balance channel when the pull-down rod moves downward.

7. The shielding cover bending device according to any one of claims 1 to 3, characterized in that: The operating platform is provided with a centering component for centering the workpiece, which includes a slide groove extending forward and backward located on the right side of the negative pressure hole, and two centering block structures are arranged in the slide groove in front and back directions. The centering block structure includes a sliding base, and springs extending forward and backward are arranged on opposite sides of the two sliding bases. A clamping block is fixed at one end of the spring away from the sliding base. The centering component also includes a driving structure for driving the two sliding bases to move relative to each other to center and clamp the workpiece.

8. The shielding cover bending device according to claim 7, characterized in that: The driving structure includes a hydraulic cavity located below the slide groove and extending forward and backward in the machine base, and two sliders are provided in the hydraulic cavity corresponding to the two sliding bases. The two sliders and the two sliding bases are made of magnetic materials so that the sliders and the corresponding sliding bases move synchronously; The two slide blocks are in a centering state when hydraulic oil is filled into the hydraulic cavity, driving the two sliding bases to approach each other. In the centering state, the workpiece on the operating platform is center-clamped by the two clamping blocks.

9. The shielding cover bending device according to claim 8, characterized in that: A hydraulic oil channel corresponding to the hydraulic cavity is provided in the machine base, and a mobile cavity connected to the hydraulic oil channel is provided on the left side of the lower pull rod. A hydraulic plate adapted to each mobile cavity is fixedly connected to the left side of each lower pull rod. The hydraulic plate has a non-squeezed state located on the upper cavity wall of the mobile cavity when the lower pull rod is in the initial position, and an squeezed state in which it moves downward to squeeze the hydraulic oil when the lower pull rod moves downward.

10. The shielding cover bending device according to any one of claims 1 to 3, characterized in that: The clamping plate is a wedge-shaped plate extending left and right, and both upper and lower sides of its left end have two inclined surfaces inclined from top to bottom to the left, and the two inclined surfaces extend to a vertical end surface to form a clamping end to avoid damage to the workpiece when the clamping plate is pressed down.

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