Shielding cover bending device

Abstract

The present invention relates to the technical field of shielding cover bending, and specifically to a shielding cover bending device, comprising a machine base, which has an operating platform, wherein the operating platform is defined as being located on the left side of the machine base, a bending plate is provided on the left side of the operating platform, a rotating motor is provided on one side of the bending plate, and an adsorption structure and a clamping structure; the adsorption structure comprises a plurality of negative pressure holes and a suction device for applying negative pressure to the negative pressure holes; the clamping structure comprises a plurality of clamping plates, 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 comprises a plurality of pull-down members, and 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 of the adsorbed workpiece can pull the corresponding clamping plate downward under negative pressure suction to clamp the workpiece. The present invention solves the technical problem in the prior art that frequent mold replacement is required when bending shielding covers of different specifications, resulting in low bending efficiency.

Description

Technical Field

[0001] The present 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 effects of electromagnetic interference and electromagnetic radiation. It is commonly used in electronic devices such as mobile phones, televisions, computers, etc. to protect internal circuits and components from external electromagnetic interference, while also preventing internal electromagnetic radiation from leaking into the external environment. The shielding cover bending equipment uses a bending die to bend the shielding cover based on 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. Existing mobile phone shielding covers are obtained by semi-automatic processing. 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 downward to complete the bending of one side of the shielding cover.

[0003] For example, the 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 cooperating 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 realizing 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 used: 1. The mold described in the device can only complete the bending operation of one specification of shielding cover at a time. When performing bending operations on shielding covers of different specifications, the operator needs 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, a shield cover bending device is needed, which can complete the bending operation of shield covers of various specifications without changing the mold, and can avoid the occurrence of skewed folding edges of the shield cover. 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:

[0008] A shield cover bending device includes a machine base having an operating platform for placing a workpiece, wherein the operating platform is defined as being located on the left side of the machine base, and a bending plate is provided on the left side of the operating platform. The front or rear side of the bending plate has a rotating motor for driving the bending plate to reciprocate and bend the workpiece. The device also includes a suction structure for sucking the workpiece from below after the workpiece is placed, and a pressing structure for pressing the workpiece from above.

[0009] The adsorption structure includes a plurality of negative pressure holes arranged in a front-to-back direction on the operating platform. Workpieces of different sizes can block different numbers of the negative pressure holes when placed. The adsorption structure also includes a suction device for applying negative pressure to the negative pressure holes. The negative pressure holes blocked by the workpiece can adsorb the workpiece on the operating platform.

[0010] The pressing structure includes a plurality of pressing plates arranged in the front-to-back direction, the right end of each pressing plate is hinged to the machine base, and the right end of each pressing plate is connected to the hinge part through a return torsion spring;

[0011] The clamping structure also includes multiple pull-down members located in the machine base and connected to the clamping single plate. The channel where 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 single plate downward under negative pressure suction to clamp the workpiece.

[0012] The beneficial effect is that by configuring the mold as an adaptive mold composed of multiple single-plate pressing plates in parallel, the shield cover bending device can adjust the mold width by controlling the number of single-plate pressing movements, eliminating the need for mold replacement and improving the applicability of the shield cover bending device. The provision of a lower pull rod and negative pressure channel enables the bending device to automatically adjust the number of single-plate pressing movements based on the number of negative pressure holes blocked by the workpiece, thereby enabling the shield cover bending device to automatically adjust the mold size according to the workpiece size without the need for additional operator control, reducing operator labor intensity while improving the bending efficiency of the shield cover bending process.

[0013] Furthermore, the pull-down member is a pull-down rod, and the base has 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 equipment provides negative pressure through the main channel.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] Furthermore, 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.

[0018] Furthermore, the lower end of each of the pull-down rods has a circumferentially extending annular groove, and a balancing 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 when the pull-down rod moves downward and is connected to both the negative pressure channel and the balance channel.

[0019] 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, and avoiding the jamming or damage of the equipment due to air pressure imbalance.

[0020] 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 provided in the slide groove in front and back directions. The centering block structure includes a sliding base, and the two sliding bases are provided with springs extending forward and backward on opposite sides. A clamping block is fixed to the 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.

[0021] Furthermore, the driving structure includes a hydraulic cavity located below the slide and extending forward and backward in the base, and two sliders corresponding to the two sliding bases are provided in the hydraulic cavity. The two sliders and the two sliding bases are made of magnetic material so that the sliders and the corresponding slides move synchronously;

[0022] The two slide blocks are in a centering state in which the two sliding bases are driven to approach each other when hydraulic oil is filled into the hydraulic cavity. In the centering state, the workpiece on the operating platform is center-clamped by the two clamping blocks.

[0023] Furthermore, the machine base has a hydraulic oil channel corresponding to the hydraulic cavity, and the left side of the lower pull rod has a movable cavity connected to the hydraulic oil channel. The left side of each lower pull rod is fixedly connected to a hydraulic plate adapted to each movable cavity. The hydraulic plate has a non-extrusion state in which it is located on the upper cavity wall of the movable cavity when the lower pull rod is in the initial position, and an extrusion state in which it moves downward to squeeze the hydraulic oil when the lower pull rod moves downward.

[0024] Its 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 offset caused by skewed placement of the workpiece and improve the bending quality of the workpiece.

[0025] Furthermore, the clamping veneer is a wedge-shaped plate extending left and right, and the upper and lower sides of its left end have two inclined surfaces tilted 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 veneer is pressed down.

[0026] The beneficial effect thereof is that the arrangement of the pressing end enables the pressing structure to avoid collision with other folded edges of the workpiece when pressing the workpiece, thereby improving the applicability of the bending device.

[0027] The beneficial effects of the shielding cover bending device provided by the present invention are:

[0028] 1. By configuring the die as an adaptive die composed of multiple juxtaposed pressing plates, the shield cover bending device can adjust the die width by controlling the number of plate pressing movements, eliminating the need for die replacement and improving the device's applicability. The provision of a pull-down rod and negative pressure channel enables the bending device to automatically adjust the number of plate pressing movements based on the number of negative pressure holes blocked by the workpiece. This allows the device to automatically adjust the die size based on the workpiece size without requiring operator control. This reduces operator labor intensity and improves the efficiency of the shield cover bending process.

[0029] 2. The setting of the pull rod spring enables the lower pull rod to automatically reset after the workpiece is bent, thereby improving the degree of automation of the equipment.

[0030] 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, and avoiding the jamming or damage of the equipment due to air pressure imbalance.

[0031] 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 large distance between the sliding base and the corresponding slider, and improving the stability of the centering component.

[0032] 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 offset caused by skewed placement of the workpiece, and improve the bending quality of the workpiece.

[0033] 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

[0034] Figure 1 This is an overall structural diagram of a shield cover bending device provided by the present invention;

[0035] Figure 2 for Figure 1 A partial cross-sectional view of the middle compression structure;

[0036] Figure 3 for Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0037] Figure 4 for Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0038] Figure 5 for Figure 2 A partial enlarged schematic diagram of point C in the middle;

[0039] Figure 6 It is a structural diagram of the centering component;

[0040] Figure 7 for Figure 6 A partial enlarged schematic diagram of point D in the middle;

[0041] Figure 8 Schematic diagram of the coordination between the centering block structure and the workpiece;

[0042] Figure 9 Schematic diagram of the structure of the lower pull rod;

[0043] Figure 10 It is a structural diagram of the centering block structure;

[0044] Figure 11 A schematic diagram of the process of bending a workpiece by the shielding cover bending device provided by the present invention;

[0045] Figure 12 A schematic diagram of the process of releasing a workpiece by the shield cover bending device provided by the present invention;

[0046] Figure 13 Schematic diagram of the bending state of the workpiece.

[0047] Description of reference numerals:

[0048] 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;

[0049] 2. Compression structure; 21. Compression board; 211. Compression 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;

[0050] 3. Bending mechanism; 31. Bending plate; 32. Fixed shaft; 33. Fixed slot; 34. Bending block;

[0051] 4. Centering assembly; 41. Hydraulic plate; 42. Hydraulic oil channel; 43. Hydraulic cavity; 44. Moving cavity; 45. Slider; 46. Slide; 462. Centering block structure; 463. Sliding base; 464. Spring; 465. Clamp; 47. Driving structure. DETAILED DESCRIPTION

[0052] The main idea of the present invention is to decompose the mold into multiple pressing single plates 21, so that the equipment can adjust the width of the mold by controlling the number of actions of pressing the 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 pressing the 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, avoiding the situation where the bending operation requires frequent replacement of the bending mold due to different specifications of the workpiece 18, thereby improving the efficiency of the bending process.

[0053] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. The numbers of any elements in the drawings are for illustration only and not for limitation, and any names are for distinction only and do not have any limiting meaning.

[0054] A shielding case is a device used to shield electronic signals. Its primary function is to prevent external electric, magnetic, or electromagnetic fields from interfering with internal devices, or to prevent the electromagnetic field of a device from affecting the outside world. The shielding case operates based on the Faraday cage effect. When an external electric field passes through the case, it creates a high-intensity electric field within the enclosure, while a lower electric field forms outside the enclosure. This prevents the external electric field from entering the internal circuitry through the shielding case, thus achieving electromagnetic shielding.

[0055] Shielding covers are typically made from sheet metal and are bent into shape using bending equipment to varying specifications and sizes. The bending accuracy of the shielding cover directly impacts its fit with the internal components of the electronic device and its shielding effectiveness. Therefore, parameters such as the bending angle and radius must be strictly controlled during the bending process to ensure the shielding cover meets the required precision. Furthermore, mold design directly impacts the mold quality and processing efficiency of the shielding cover. Customizing and selecting the appropriate mold based on specific design requirements requires ensuring mold accuracy and durability.

[0056] The shield cover bending equipment typically includes a frame, a workbench, a bending mechanism 3, a power system, and a control system. The bending mechanism 3 includes a bending die, a bending arm, and other components for bending the shield cover. The design of the bending mechanism 3 is typically customized based on the shape and size of the workpiece 18.

[0057] 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 removed from the workbench.

[0058] 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, bending molds of corresponding sizes need 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.

[0059] Furthermore, manually adjusting the position of the workpiece 18 using a positioning device has certain inaccuracies. Human error can often cause the folded edge of the workpiece 18 to be non-parallel to the side of the bending die, leading to skewed folded edges and reduced yield rates in shield case production. Therefore, it is necessary to design a bending device that can automatically adjust the size of the bending die according to the size of the workpiece 18.

[0060] The principles and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0061] Embodiment 1 of a shield cover bending device provided by the present invention:

[0062] like Figures 1 to 13 As shown, the shield cover bending device mainly includes a base 1, a clamping structure 2, an adsorption structure 16, a bending mechanism 3, and a centering component 4. The base 1 is the carrier of the shield cover bending device. The base 1 has an operating platform 12, which is defined as being located on the left side of the base 1. The operating platform 12 is provided with a workpiece 18. The clamping structure 2 is located above the operating platform 12 and is used to clamp the workpiece 18. The adsorption structure 16 is located on the operating platform 12 and below the workpiece 18. 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 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.

[0063] First, the adsorption structure 16 is introduced, such as Figure 7As shown, the suction structure 16 includes multiple negative pressure holes 17 located on the operating platform 12, each of which is arranged in a front-to-back direction. When a workpiece 18 is placed on the operating platform 12, workpieces 18 of different sizes can block different numbers of the negative pressure holes 17. The suction structure 16 also includes a suction device (not shown) located outside the machine base 1. The suction device (not shown) is used to apply negative pressure to the negative pressure holes 17, causing the negative pressure holes 17 to absorb the workpiece 18 onto the operating platform 12.

[0064] Then introduce the compression structure 2, such as Figure 2 As 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 plates 21 are wedge-shaped plates 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 from top to bottom to the left, and the two inclined surfaces extend to a vertical end surface to form a clamping end 211, which 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.

[0065] 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 to enable each clamping plate 21 to automatically reset after completing the bending of the workpiece 18.

[0066] In addition, if Figure 2 、 Figure 4 and Figure 9 As shown, the compression structure 2 further includes a pull-down rod 23 located below each compression 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 inside the machine base 1. A pull-down groove 236 is provided in the machine base 1 corresponding to each pull-down rod 23, and a negative pressure channel 234 is provided at the lower end of each negative pressure hole 17 for transmitting negative pressure to the negative pressure hole 17. A main channel 235 is provided below the multiple negative pressure channels 234 in the machine base 1. The main channel 235 is connected to the suction device, and the negative pressure channels 234 are connected to each other, so that the main channel 235 is connected to each negative pressure channel 234.

[0067] 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 that adsorbs the workpiece 18 can move downward under negative pressure suction. A pull rod spring 233 is installed in each pull-down groove 236. It is located at the lower end of the pull-down rod 23 and is used to reset the pull-down rod 23 after completing the downward movement.

[0068] 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 compression 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 compression single plate 21 along the support shaft 15.

[0069] like Figure 2 and Figure 5 As shown, the right side of each of the pull-down grooves 236 is provided with a balancing channel 237 connected to the atmospheric pressure. The balancing channel 237 is located in the machine base 1, and the lower end of each pull-down rod 23 is provided with a circumferentially extending annular groove 232. During the downward movement of the pull-down rod 23, the corresponding clamping plate 21 simultaneously moves downward. When the annular groove 232 connects the negative pressure channel 234 and the balancing channel 237, the clamping plate 21 can now clamp the workpiece 18. At the same time, 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 to the negative pressure pipeline 234, the balancing channel 237 and the annular groove 232 can reduce the effect 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.

[0070] Then introduce the centering component 4, such as Figure 2 、 Figure 6 and Figure 10 As shown, the centering assembly 4 includes a rectangular chute 46 located to the right of the negative pressure hole 17. The chute 46 extends in the front-to-back direction. Two centering block structures 462 are slidably disposed within the chute 46. The centering block structures 462 include L-shaped sliding bases 463. Springs 464 extending forward and backward are disposed on opposing sides of the two sliding bases 463. A rectangular clamping block 465 is fixedly disposed on the side of the spring 464 away from the sliding base 463. The two clamping blocks 465 are used to push the workpiece 18 toward the opposite side under the action of the springs 464.

[0071] 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 to center and clamp the workpiece 18 .

[0072] like Figure 6 and Figure 7As shown, the drive structure 47 includes a rectangular hydraulic cavity 43 located below the slide 46. The hydraulic cavity 43 is located within the machine base 1 and extends in the front-to-back direction. Two sliders 45 are installed in the hydraulic cavity 43, corresponding to the two sliding bases 463. Both the sliders 45 and the two sliding bases 463 are made of magnetic materials. When the two sliders 45 move back and forth, they can also drive the corresponding sliding bases 463 to move back and forth. The center of the hydraulic cavity 43 is connected to atmospheric pressure. When the two sliders 45 in the hydraulic cavity 43 move in opposite directions, the air pressure in the hydraulic cavity 43 can prevent the movement of the two sliders 45 from being affected by the air pressure in the hydraulic cavity 43.

[0073] When hydraulic oil is filled into the front and rear ends of the hydraulic cavity 43, 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 centered and clamped 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.

[0074] like Figure 2 、 Figure 4 and Figure 6 As shown, the base 1 is further provided with a hydraulic oil passage 42 connected to the front and rear ends of the hydraulic cavity 43. A rectangular movable cavity 44 is provided on the left side of each of the lower tie rods 23, and the bottom of each movable 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 tie rods 23, and each hydraulic plate 41 is adapted to the corresponding movable cavity 44. When the hydraulic plate 41 is located on the upper cavity wall of the corresponding movable cavity 44, the two sliders 45 are in a separated state; 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 close to each other under the squeezing action of the hydraulic oil on the front and rear sides of the hydraulic cavity 43.

[0075] Then introduce the bending mechanism 3, such as Figure 1As shown, the bending mechanism 3 includes a rectangular bending plate 31 located on the left side of the operating platform 12. The bending plate 31 extends in the front-to-back direction. Fixed shafts 32 are provided at both the front and rear ends of the bending plate 31. The fixed shafts 32 are provided with fixing slots 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. The rear end of the fixed shaft 32 is provided with a rotary 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 rotary motor 11, and the rear end of the machine base 1 is provided with a button 2 14 for controlling an external suction device to control the bending device to complete the bending of the workpiece 18.

[0076] The working principle of the shield bending device is as follows:

[0077] like Figures 11 to 13 As shown, first, the workpiece 18 to be bent is placed on the operating platform 12. Then, the button 2 14 on the base 1 is used to activate the suction device located outside the base 1. The suction device transmits the suction force to each negative pressure hole 17 and each lower pull-down groove 236 through the main channel 235 and each negative pressure channel 234. Then, the lower pull rod 23 in the lower pull-down 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 downward movement of the lower pull rod 23 compresses the pull rod spring 233.

[0078] As the lower tie rod 23 moves downward, the hydraulic plate 41 on the left side of the lower tie rod 23 moves downward from the upper wall of the movable cavity 44 in which it resides. This compresses the hydraulic oil within the corresponding movable cavity 44 and the hydraulic oil passage 42, causing the two sliders 45 at the front and rear ends of the hydraulic cavity 43 to move toward each other. The two sliders 45 then, through the magnetic attraction between themselves and their corresponding sliding bases 463, respectively drive the two centering blocks 462 to move toward each other, aligning the workpiece 18 between the two centering blocks 462.

[0079] Furthermore, as the lower pull rod 23 moves downward, the corresponding compression plate 21 rotates downward about the support shaft 15 driven by the hinge shaft 231 at the upper end of the lower pull rod 23. This causes the return torsion spring 212 at the right end of the corresponding compression plate 21 to be compressed. When the compression end 211 of the compression plate 21 presses against the workpiece 18, the lower pull rod 23 stops moving downward. At this point, the annular groove 232 at the lower end of the lower pull rod 23 communicates with the corresponding negative pressure channel 234 and the balance channel 237.

[0080] Then, the rotary motor 11 is activated by pressing button 13 on the machine base 1. The rotary motor 11 drives the bending plate 31, which is in a vertical state, to rotate upward. The bending plate 31 rotates upward to a horizontal position, and then the rotary motor 11 drives the bending plate 31 to rotate downward and reset. During the upward rotation of the bending plate 31, the folded edge of the workpiece 18 is bent upward under the push of the bending block 34, completing the bending operation of the workpiece 18. The suction device is then controlled to close by pressing button 13 on the machine base 1. At this time, the negative pressure in the negative pressure hole 17, the negative pressure channel 234, and the lower pull groove 236 gradually weakens until it disappears, and the lower pull rod 23 moves upward and resets under the push of the pull rod spring 233.

[0081] During the upward movement of the lower tie rod 23, the annular groove 232 on the lower tie rod 23 is connected to atmospheric pressure via the balancing channel 237, eliminating the effect of the residual negative pressure in the negative pressure channel 234 on the upward movement of the lower tie rod 23, allowing the lower tie rod 23 to quickly reset. In addition, during the upward movement of the lower tie rod 23, the hydraulic plate 41 in the corresponding movable cavity 44 is driven upward. The hydraulic oil in the hydraulic cavity 43 and the hydraulic oil channel 42 is squeezed into the movable 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. During the forward and backward movement of the two sliders 45, the corresponding centering block structure 462 is driven to reset to the front and rear ends of the slide 46.

[0082] Finally, under the action of the reset torsion spring 212 , the corresponding pressing single plate 21 rotates upward and resets. At this time, the operator can take out the workpiece 18 and perform the bending operation of the next workpiece 18 .

[0083] Embodiment 2 of a shield cover bending device provided by the present invention:

[0084] The main difference between it and Example 1 is:

[0085] In embodiment 1, the rotating motor is located at the rear side of the machine base.

[0086] In this embodiment, the rotating motor is located at the front side of the machine base or at other locations.

[0087] Embodiment 3 of a shield cover bending device provided by the present invention:

[0088] The main difference between it and Example 1 is:

[0089] In Example 1, the slider and the corresponding sliding base move synchronously through magnetic attraction.

[0090] In this embodiment, the slider and the corresponding sliding base are fixedly connected via a connecting rod structure to achieve synchronous movement.

[0091] Embodiment 4 of a shield cover bending device provided by the present invention:

[0092] The main difference between it and Example 1 is:

[0093] In Example 1, the pressing plate is a wedge-shaped block, and the left end of the pressing plate has a pressing end for pressing the workpiece.

[0094] In this embodiment, the pressing plate is a rectangular block, and a rectangular pressing head extending up and down is provided at the left end of the pressing plate.

[0095] 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 other terms indicating orientation or positional relationships are based on the orientation or positional relationships 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 positional 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 base having an operating platform for placing a workpiece, wherein the operating platform is defined as being located on the left side of the base, a bending plate is provided on the left side of the operating platform, and a rotating motor is provided on the front or rear side of the bending plate for driving the bending plate to reciprocate and 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 in a front-to-back direction on the operating platform. Workpieces of different sizes can block different numbers of the negative pressure holes when placed. The adsorption structure also includes a suction device for applying negative pressure to the negative pressure holes. The negative pressure holes blocked by the workpiece can adsorb the workpiece on the operating platform. The pressing structure includes a plurality of pressing plates arranged in the front-to-back direction, the right end of each pressing plate is hinged to the machine base, and the right end of each pressing plate is connected to the hinge part through a return torsion spring; The pressing structure also includes a plurality of pull-down members located in the machine base and connected to the pressing single plate. 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 for adsorbing the workpiece can pull the corresponding pressing single plate downward under negative pressure suction to compress the workpiece. The pull-down member is a pull-down rod, and the base has a pull-down groove corresponding to each pull-down rod, the pull-down groove is connected to the negative pressure channel, and the base also has a main channel connected to the negative pressure channel, and the suction device provides negative pressure through the main channel; 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.

2. The shield cover bending device according to claim 1, wherein: 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.

3. The shield cover bending device according to claim 1, wherein: 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.

4. The shield cover bending device according to claim 1, wherein: The lower end of each of the pull-down rods has a circumferentially extending annular groove, and a balancing 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 balancing position for balancing the atmospheric pressure when the pull-down rod moves downward and is connected to both the negative pressure channel and the balancing channel.

5. The shield cover bending device according to claim 1, wherein: 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 provided in the slide groove in front and back directions. The centering block structure includes a sliding base, and the two sliding bases are provided with springs extending forward and backward on opposite sides. A clamping block is fixed to the 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.

6. The shield cover bending device according to claim 5, characterized in that: The driving structure includes a hydraulic cavity located below the slide and extending forward and backward in the base. 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 material so that the sliders and the corresponding slides move synchronously. The two slide blocks are in a centering state in which the two sliding bases are driven to approach each other when hydraulic oil is filled into the hydraulic cavity. In the centering state, the workpiece on the operating platform is center-clamped by the two clamping blocks.

7. The shield cover bending device according to claim 6, characterized in that: There is a hydraulic oil channel corresponding to the hydraulic cavity in the machine base, and a movable cavity connected to the hydraulic oil channel is provided on the left side of the lower pull rod. A hydraulic plate adapted to each movable 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 movable 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.

8. The shield cover bending device according to claim 1, wherein: The clamping veneer is a wedge-shaped plate extending left and right, and both the upper and lower sides of its left end have two inclined surfaces tilted from top to bottom to the left. The two inclined surfaces extend to a vertical end surface to form a clamping end to avoid damage to the workpiece when the clamping veneer is pressed down.

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