Concealed hole machining device for switch shell

Abstract

The invention relates to the technical field of plate punching, in particular to a hidden hole machining device for a switch shell. Comprising a punching machine and an output shaft of the punching machine. The upper surface of a workbench of the punching machine is fixedly connected with a lower pressing plate. Lower adjusting holes are uniformly formed in the upper surface of the lower pressing plate; the lower end of a lower cylinder is inserted into the lower adjusting hole; a lower die hole is formed in the upper surface of the lower cylinder; the hole diameter of the lower die hole is matched with the hole diameter of a hole to be punched. An output shaft of the punching machine is fixedly connected with the upper pressing plate; the upper pressing plate is located over the lower pressing plate. The upper cylinders are controlled to be inserted into different positions of the upper adjusting holes in the lower surface of the upper pressing plate, and the lower cylinders are controlled to be inserted into different positions of the lower adjusting holes in the upper surface of the lower pressing plate, so that the positions of the upper cylinders and the lower cylinders correspond to the position to be punched, and the punching requirements of different numbers and different positions are met.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet punching, and specifically relates to a concealed hole processing device for a switch housing. Background Art

[0002] In modern building electrical systems, embedded electrical switches are widely used in various places, from residential houses to commercial buildings, from industrial factories to public facilities, etc. The switch box is one of the components of the housing of the embedded electrical switch. Specifically, as disclosed in our previous application with the publication number CN118197843A and the subject name of a technology for an embedded electrical switch. The switch box is used to protect the internal components of the switch, provide a regular space for wiring, and also assist in the precise installation of the switch, playing an indispensable role in the building electrical system. Concealed holes are provided on the bottom wall and side walls of the switch box; the concealed holes serve the purpose of protection and shielding when not in use, and allow wire harnesses to pass through when in use. The switch box is divided into a non-metallic switch box and a metallic switch box from the perspective of material, and the metallic switch box is suitable for places with higher protection requirements.

[0003] The metallic switch box is box-shaped with one side open. The metallic switch box is formed by stamping a relatively large sheet into a cross shape, followed by concealed hole punching, and finally bending and welding into a box shape. Concealed hole punching is an important process for the metallic switch box. The number of concealed holes is multiple, and they are respectively distributed on the bottom wall and side walls of the switch box. In order to improve the processing efficiency of concealed hole punching, multiple concealed holes on the same cross-shaped metallic sheet are punched synchronously and simultaneously. However, the positions and spacings of the cutting tools on the existing punching devices are fixed, making it difficult to meet the punching requirements for different numbers and different positions of concealed holes. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the present invention proposes a concealed hole processing device for a switch housing. By controlling the insertion of the upper cylinder into different positions of the upper adjustment holes on the lower surface of the upper pressure plate and the insertion of the lower cylinder into different positions of the lower adjustment holes on the upper surface of the lower pressure plate in cooperation, the positions of the upper cylinder and the lower cylinder are made to correspond to the positions of the holes to be punched, thereby meeting the punching requirements for different numbers and different positions.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A dark hole processing device for a switch housing according to the present invention includes a stamping machine and the output shaft of the stamping machine: The upper surface of the workbench of the stamping machine is fixedly connected with a lower pressing plate; The upper surface of the lower pressing plate is evenly provided with lower adjusting holes; The lower end of the lower cylinder is inserted into the lower adjusting hole; The upper surface of the lower cylinder is provided with a lower die hole; The aperture of the lower die hole is adapted to the aperture of the hole to be punched; The output shaft of the stamping machine is fixedly connected with an upper pressing plate; The upper pressing plate is located directly above the lower pressing plate; The lower surface of the upper pressing plate is evenly provided with upper adjusting holes; The upper end of the upper cylinder is inserted into the upper adjusting hole; The outer diameter of the upper cylinder is adapted to the aperture of the hole to be punched; The lower end surface of the upper cylinder is inclined; The upper cylinder is located directly above the corresponding lower cylinder and is adapted to the hole position of the hole to be punched on the workpiece.

[0006] Preferably, an upper support ring is fixedly connected to the upper position of the outer wall of the upper cylinder; A clamping sleeve is slidably connected to the outer wall of the upper cylinder; The inner diameter of the clamping sleeve is adapted to the outer wall of the upper cylinder; The outer diameter of the clamping sleeve is adapted to the outer diameter of the lower cylinder; One end of the clamping sleeve is connected to the lower surface of the upper support ring through an upper spring.

[0007] Preferably, a reset block is slidably connected in the lower die hole; The lower surface of the reset block is connected to the bottom of the lower die hole through a lower spring.

[0008] Preferably, arc-shaped grooves are provided on the inner walls of the upper adjusting holes and the lower adjusting holes; The depth of the arc-shaped grooves decreases sequentially in the circumferential direction; Grooves are provided on the outer walls of the upper ends of the upper cylinder and the lower ends of the lower cylinder; A clamping block is slidably connected in the groove; The clamping block is connected to the bottom of the groove through a first spring.

[0009] Preferably, a guiding surface is inclined at one end of the clamping block away from the bottom of the groove; The guiding surface faces the corresponding arc-shaped groove.

[0010] Preferably, anti-blocking blocks are slidably connected in the upper adjusting holes and the lower adjusting holes; The bottoms of the upper adjusting holes and the lower adjusting holes are connected to the anti-blocking blocks through second springs.

[0011] Preferably, the anti-blocking blocks are slidably and sealingly connected in the upper adjusting holes and the lower adjusting holes; A first liquid hole is provided in the upper pressing plate; The bottoms of multiple upper adjusting holes are communicated through the first liquid hole; A second liquid hole is provided in the lower pressing plate; The bottoms of multiple lower adjusting holes are communicated through the second liquid hole.

[0012] Preferably, a circular groove is provided on the upper surface of the reset block; a circular block is movably and sealingly connected in the circular groove; the bottom of the circular groove communicates with the lower surface of the reset block through a first air hole; the reset block is movably and sealingly connected with the lower die hole; the lower die hole communicates with the outer wall of the lower cylinder through a second air hole; the circular block is composed of a central round bar and a surrounding round sleeve; the round bar is movably and sealingly connected with the round sleeve; the number of the round sleeves is multiple; and the multiple round sleeves are movably and sealingly connected with each other.

[0013] Preferably, the aperture of the second air hole is arranged to increase as it is farther away from the lower die hole; and the aperture of the first air hole is arranged to increase as it is farther away from the circular groove.

[0014] The beneficial effects of the present invention are as follows: 1. By controlling the positions of the upper cylinder inserted into different positions of the upper adjustment holes on the lower surface of the upper pressing plate and the lower cylinder inserted into different positions of the lower adjustment holes on the upper surface of the lower pressing plate in cooperation, the positions of the upper cylinder and the lower cylinder correspond to the positions to be punched, so as to meet the punching requirements of different quantities and different positions.

[0015] 2. During the punching process of the upper cylinder, the workpiece is clamped tightly by the clamping sleeve, so as to clamp the workpiece during the punching process, and further prevent the workpiece from slipping and shifting during the punching process, making the punching of the workpiece smoother and more stable; in addition, before the clamping sleeve disengages from the upper surface of the workpiece, the reset block is controlled to move upward as the upper cylinder moves upward, so as to push the hole material pushed out of the dark hole back into the dark hole, thus saving the subsequent step of pushing the hole material back into the dark hole, making the punching of the workpiece and the adjustment of the workpiece formed at one time, and improving the processing efficiency of the switch housing.

[0016] 3. The arc-shaped grooves with variable groove depths in the upper adjustment holes and the lower adjustment holes cooperate with the clamping blocks, so that the upper end of the upper cylinder and the lower end of the lower cylinder can be locked after installation by rotating forward, and the upper cylinder and the lower cylinder can be removed by rotating backward. Compared with the existing installation method, the convenience of adjusting the positions of the upper cylinder and the lower cylinder is improved.

[0017] 4. The outer wall of the lower cylinder is radially supported by the anti-blocking blocks extending out of the lower adjustment holes around it, so as to indirectly improve the strength of the lower cylinder during the stamping process, avoid damage caused by bending of the lower cylinder, and improve the stability of the punching device.

[0018] 5. When the reset block moves downward with the upper cylinder, the gas pressure of the lower die hole is generated, so that the upper end of the circular block forms a cone shape to press the hole material tightly against the lower surface of the upper cylinder, minimizing the deformation of the hole material after being cut out of the dark hole, maximizing the flatness of the hole material, so that the hole material is more matched after returning to the dark hole. Description of the Drawings

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a processing schematic diagram of the inner case in the switch housing; Figure 2 It is a three-dimensional view of the present invention; Figure 3 It is a three-dimensional view of the upper pressing plate and the lower pressing plate of the present invention; Figure 4 It is a three-dimensional view of the upper cylinder and the lower cylinder of the present invention; Figure 5 It is a partial cross-sectional view of the upper pressing plate and the lower pressing plate of the present invention; Figure 6 It is Figure 5 an enlarged view of part A in; Figure 7 It is a cross-sectional view of the arc-shaped groove in the present invention; Figure 8 It is a matching schematic diagram of the upper cylinder and the round block of the present invention; Figure 9 It is a cross-sectional view of the round block of the present invention.

[0021] In the figure: punching machine 1, output shaft 11, workbench 12, lower pressing plate 3, lower adjustment hole 31, second liquid hole 32, lower cylinder 4, lower die hole 41, reset block 42, lower spring 43, round groove 44, first air hole 45, second air hole 46, upper pressing plate 5, upper adjustment hole 51, arc-shaped groove 52, first liquid hole 53, upper cylinder 6, upper support ring 61, clamping sleeve 62, upper spring 63, groove 64, clamping block 65, first spring 66, guiding surface 67, anti-blocking block 7, second spring 71, round block 8, round bar 81, round sleeve 82. Specific Embodiments

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0023] As Figures 1 to 9 shown, the present invention includes the following embodiments: Embodiment 1: A device for machining blind holes in a switch housing, comprising a stamping machine 1 and an output shaft 11 of the stamping machine 1: A lower pressing plate 3 is fixedly connected to the upper surface of a workbench 12 of the stamping machine 1; Lower adjusting holes 31 are uniformly arranged on the upper surface of the lower pressing plate 3; The lower end of a lower cylinder 4 is inserted into the lower adjusting hole 31; A lower die hole 41 is arranged on the upper surface of the lower cylinder 4; The aperture of the lower die hole 41 is adapted to the aperture of the hole to be stamped; The output shaft 11 of the stamping machine 1 is fixedly connected to an upper pressing plate 5; The upper pressing plate 5 is located directly above the lower pressing plate 3; Upper adjusting holes 51 are uniformly arranged on the lower surface of the upper pressing plate 5; The upper end of an upper cylinder 6 is inserted into the upper adjusting hole 51; The outer diameter of the upper cylinder 6 is adapted to the aperture of the hole to be stamped; The lower end face of the upper cylinder 6 is inclined; The upper cylinder 6 is located directly above the corresponding lower cylinder 4 and is adapted to the hole position of the hole to be stamped on the workpiece.

[0024] After the metal sheet is punched into a cross shape, the cross-shaped metal sheet is placed on the upper surface of the lower pressing plate 3, and the upper end of the corresponding upper cylinder 6 is inserted into the upper adjustment hole 51 according to the position of the hole to be punched on the workpiece on the lower pressing plate 3. Since the upper end of the upper cylinder 6 is tightly matched with the upper adjustment hole 51, it will not fall off. Since there are multiple and evenly distributed upper adjustment holes 51 on the lower surface of the upper pressing plate 5, the position of the upper cylinder 6 can be adjusted so that the position of the upper cylinder 6 is adapted to the position of the hole to be punched. Then, the metal sheet to be punched, i.e., the workpiece, is removed from the upper surface of the lower pressing plate 3, and the workpiece is adjusted according to the upper adjustment hole 51. The upper cylinder 6 on the upper pressing plate 5 is positioned, and the lower end of the lower cylinder 4 is inserted into the corresponding lower adjusting hole 31. Then, while the upper cylinder 6 and the lower cylinder 4 maintain a certain gap, the workpiece is placed in the upper end of the lower cylinder 4. The upper ends of the multiple lower cylinders 4 are kept at the same height, so that the workpiece can be stably placed on the upper ends of the multiple lower cylinders 4. Then, the punching machine 1 is started to work, and the punching machine 1 will drive the output shaft 11 to move downward. The mechanism by which the punching machine 1 drives the output shaft 11 to move up and down is the existing technology, which will not be described in detail here. The punching machine 1 will drive the output shaft 11 to move downward. The upper pressing plate 5 is moved downward, and the upper cylinder 6 is driven to move downward during the movement of the upper pressing plate 5. The lower end surface of the upper cylinder 6 is inclined, so that the lower end of the upper cylinder 6 is easier to break the workpiece, and a dark hole is formed under the punching of the upper cylinder 6. The hole material in the dark hole is pressed out from the dark hole and enters the inner side of the lower die hole 41. The lower end of the upper cylinder 6 enters the lower die hole 41. In order to prevent the hole material from completely escaping from the dark hole, a part of the lower surface of the upper cylinder 6 is controlled not to enter the lower die hole 41. In this way, the dark hole and the hole material in the dark hole are not completely disconnected, and the workpiece is kept formed after punching. Blind hole: The setting of the blind hole enables the switch housing to be opened when necessary. After the punching is completed, the punching machine 1 will drive the output shaft 11 to move upward, and the upper pressing plate 5 will drive the upper cylinder 6 to move upward. The lower end of the upper cylinder 6 will move out of the lower die hole 41, and the upper cylinder 6 will move away from the lower cylinder 4 to form a gap. Then, the workpiece can be removed from the upper surface of the lower cylinder 4, and then the new workpiece will be placed back on the upper end of the lower cylinder 4, and the next round of punching will be carried out. After the blind hole is punched, the workpiece will press the hole material back to the blind hole, and after the four edges are bent and welded, a dark box in the switch housing is formed; The present invention controls the upper cylinder 6 to be inserted into different positions of the upper adjustment hole 51 on the lower surface of the upper pressure plate 5, and the lower cylinder 4 to be inserted into different positions of the lower adjustment hole 31 on the upper surface of the lower pressure plate 3, so that the number of positions of the upper cylinder 6 and the lower cylinder 4 corresponds to the positions to be punched, thereby meeting the punching requirements of different numbers and different positions.

[0025] Embodiment 2: The upper outer wall of the upper cylinder 6 is fixedly connected to the upper support ring 61; the outer wall of the upper cylinder 6 is slidably connected to the clamping sleeve 62; the inner diameter of the clamping sleeve 62 is adapted to the outer wall of the upper cylinder 6; the outer diameter of the clamping sleeve 62 is adapted to the outer diameter of the lower cylinder 4; the upper end of the clamping sleeve 62 is connected to the lower surface of the upper support ring 61 via an upper spring 63.

[0026] In this embodiment, a reset block 42 is slidably connected inside the lower die hole 41 ; the lower surface of the reset block 42 is connected to the bottom of the lower die hole 41 via a lower spring 43 .

[0027] In the initial state, the reset block 42 is located at the opening of the lower die hole 41 under the elastic force of the lower spring 43, and the upper surface of the reset block 42 is flush with the upper surface of the lower cylinder 4. Then, after the workpiece is placed on the upper end of the lower cylinder 4, the punching machine 1 will drive the output shaft 11 to move downward, and the upper pressure plate 5 will move downward. During the downward movement of the upper pressure plate 5, the upper cylinder 6 will be driven downward. During the downward movement of the upper cylinder 6, the upper support ring 61 and the clamping sleeve 62 will be driven downward. In the initial state, the lower end of the clamping sleeve 62 is vertically The workpiece is clamped by the clamping sleeve 62 and the lower cylinder 4. Then, the upper pressing plate 5 will continue to move downward, and the upper pressing plate 5 will drive the upper cylinder 6 and the upper support ring 61 to move downward. The clamping sleeve 62 cannot move downward further, so that the upper spring 63 is compressed, and the lower end of the upper cylinder 6 finally extends out of the clamping sleeve 62 and clamps the workpiece. The lower end of the upper cylinder 6 will punch the workpiece, and the lower end of the upper cylinder 6 will break the workpiece into the lower die hole 41. The hole material and the lower end of the upper cylinder 6 will squeeze the reset block 42 in the lower die hole 41, so that the reset block 42 will overcome the downward elastic force and move downward. The reset block 42 moves downward to avoid the lower end of the upper cylinder 6. After the punching of the blind hole is completed, the upper pressure plate 5 will move up. During the upward movement of the upper pressure plate 5, the upper cylinder 6 and the upper support ring 61 will be driven to move up. When the clamping sleeve 62 is not detached When the workpiece is removed, the upper cylinder 6 moves upward, causing the reset block 42 to move upward due to the elastic force of the lower spring 43. During the upward movement of the reset block 42, the hole material in the lower die hole 41 is pushed upward until the hole material is pushed back into the dark hole by the reset block 42. The hole material remains partially connected to the dark hole to meet the shielding of the dark hole when it is not enabled. Then, when the upper pressing plate 5 continues to move upward, the upper spring 63 stretches to the maximum extent and drives the clamping sleeve 62 to move upward. The clamping sleeve 62 will detach from the workpiece, and the workpiece formed by the dark hole punching can be removed. In this embodiment, the clamping sleeve 62 presses against the workpiece during the punching process of the upper cylinder 6, thereby realizing the clamping of the workpiece during the punching process, and further preventing the workpiece from slipping and shifting during the punching process, making the punching of the workpiece smoother and more stable. In addition, before the clamping sleeve 62 separates from the upper surface of the workpiece, the reset block 42 is controlled to move upward as the upper cylinder 6 moves upward, thereby pushing the hole material pushed out of the blind hole back into the blind hole, thus saving the subsequent step of pushing the hole material back into the blind hole, enabling the punching of the workpiece and the adjustment of the workpiece to be formed in one step, and improving the processing efficiency of the switch housing.

[0028] Embodiment 3: Arc-shaped grooves 52 are provided on the inner walls of the upper adjustment hole 51 and the lower adjustment hole 31; the depth of the arc-shaped grooves 52 gradually decreases in the circumferential direction; grooves 64 are provided on the outer walls of the upper end of the upper cylinder 6 and the lower end of the lower cylinder 4; a clamping block 65 is slidably connected in the grooves 64; the clamping block 65 is connected to the bottom of the grooves 64 by a first spring 66.

[0029] In this embodiment, a guide surface 67 is obliquely provided at one end of the clamping block 65 away from the bottom of the groove 64; the guide surface 67 faces the corresponding arc-shaped groove 52.

[0030] The diameter of the upper end of the upper cylinder 6 is smaller and is adapted to the diameter of the upper adjustment hole 51. When the upper end of the upper cylinder 6 enters the upper adjustment hole 51, the upper end of the upper cylinder 6 will drive the clamping block 65 into the upper adjustment hole 51. The guiding surface 67 of the clamping block 65 away from the clamping groove contacts the orifice of the upper adjustment hole 51, thereby squeezing the clamping block 65 at the upper end of the upper cylinder 6 to retract into the corresponding groove 64 for avoidance. After the upper end of the upper cylinder 6 drives the clamping block 65 into the interior of the upper adjustment hole 51, rotate the upper cylinder 6, and the upper cylinder 6 will drive the groove 64 to align with the deeper position of the arc-shaped groove 52. The clamping block 65 in the groove 64 will be clamped into the arc-shaped groove 52 under the elastic force of the first spring 66. After the clamping block 65 is clamped into the arc-shaped groove 52, the inability to rotate the upper cylinder 6 in the forward direction indicates that the upper cylinder 6 is locked. If it is necessary to remove the upper cylinder 6 from the upper adjustment hole 51, just rotate the upper cylinder 6 in the reverse direction. The upper cylinder 6 will drive the clamping block 65 to move from the deeper position of the arc-shaped groove 52 to the shallower position. The clamping block 65 will gradually overcome the first spring 66 and retract into the groove 64. As the upper cylinder 6 continues to rotate, the clamping block 65 will move out of the arc-shaped groove 52, and then directly control the upper cylinder 6 to move down to disengage from the locking of the upper adjustment hole 51; Similarly, the diameter of the lower end of the lower cylinder 4 is smaller and is adapted to the diameter of the lower adjustment hole 31. When the lower end of the lower cylinder 4 drives the clamping block 65 into the lower adjustment hole 31, the guiding surface 67 on the clamping block 65 will be pressed and retract into the groove 64 until the lower end of the lower cylinder 4 drives the groove 64 to align with the arc-shaped groove 52 in the lower adjustment hole 31, and the clamping block 65 is clamped into the arc-shaped groove 52 to lock the lower cylinder 4. The inability to rotate the lower cylinder 4 in the forward direction indicates that the lower cylinder 4 is locked. Rotating in the reverse direction and pulling out can quickly unlock the lower cylinder 4 and disengage it from the lower adjustment hole 31; In this embodiment, the arc-shaped grooves 52 with variable groove depths in the upper adjustment hole 51 and the lower adjustment hole 31 are matched with the clamping block 65, so that the upper end of the upper cylinder 6 and the lower end of the lower cylinder 4 can be locked after being inserted and rotated forward, and the upper cylinder 6 and the lower cylinder 4 can be removed by rotating in the reverse direction and pulling out. Compared with the existing installation method, the convenience of adjusting the positions of the upper cylinder 6 and the lower cylinder 4 is improved.

[0031] Embodiment 4: An anti-blocking block 7 is slidably connected in the upper adjustment hole 51 and the lower adjustment hole 31; the bottom of the upper adjustment hole 51 and the lower adjustment hole 31 is connected to the anti-blocking block 7 through a second spring 71.

[0032] In this embodiment, the anti-blocking block 7 is slidably and sealingly connected in the upper adjustment hole 51 and the lower adjustment hole 31; a first liquid hole 53 is provided in the upper pressing plate 5; the bottoms of a plurality of the upper adjustment holes 51 are communicated through the first liquid hole 53; a second liquid hole 32 is provided in the lower pressing plate 3; the bottoms of a plurality of the lower adjustment holes 31 are communicated through the second liquid hole 32.

[0033] When the upper end of the upper cylinder 6 is not inserted into the upper adjustment hole 51, the orifice of the upper adjustment hole 51 is flush with the anti-blocking block 7. The upper adjustment hole 51 is filled with a liquid medium. As the upper end of the upper cylinder 6 is inserted into the upper adjustment hole 51, the anti-blocking block 7 in the upper adjustment hole 51 will be squeezed by the upper end of the upper cylinder 6 and overcome the second spring 71 to approach the bottom of the upper adjustment hole 51. The liquid in the upper adjustment hole 51 inserted by the upper end of the upper cylinder 6 will flow into other upper adjustment holes 51 that are not inserted with the upper cylinder 6 along the first liquid hole 53. In this way, the anti-blocking blocks 7 in the upper adjustment holes 51 around the upper cylinder 6 protrude. The outer wall of the upper cylinder 6 is limited by the contact of the anti-blocking blocks 7 protruding from the upper adjustment hole 51, which improves the strength of the upper cylinder 6 during the stamping process and avoids damage caused by bending of the upper cylinder 6. Similarly, when the lower end of the lower cylinder 4 is not inserted into the lower adjustment hole 31, the orifice of the lower adjustment hole 31 is flush with the anti-blocking block 7. In this way, the debris generated during the punching process cannot enter the lower adjustment hole 31 to cause blockage, and the anti-blocking block 7 in the lower adjustment hole 31 serves the purpose of anti-blocking. As the lower end of the lower cylinder 4 is inserted into the lower adjustment hole 31, the anti-blocking block 7 in the lower adjustment hole 31 is squeezed by the lower end of the lower cylinder 4 and overcomes the elastic force of the second spring 71 to approach the bottom of the lower adjustment hole 31. The liquid in the upper adjustment hole 51 inserted by the lower cylinder 4 will flow into other lower adjustment holes 31 that are not inserted with the lower cylinder 4 along the second liquid hole 32. In this way, the anti-blocking blocks 7 in the lower adjustment holes 31 around the lower cylinder 4 protrude. The outer wall of the lower cylinder 4 is limited by the contact of the anti-blocking blocks 7 protruding from the surrounding lower adjustment hole 31, realizing radial support for the lower cylinder 4, and indirectly improving the strength of the lower cylinder 4 during the stamping process, avoiding damage caused by bending of the lower cylinder 4, and improving the stability of the punching device.

[0034] Embodiment 5: A circular groove 44 is provided on the upper surface of the reset block 42; a circular block 8 is movably and sealingly connected in the circular groove 44; the bottom of the circular groove 44 is communicated with the lower surface of the reset block 42 through a first air hole 45; the reset block 42 is movably and sealingly connected with the lower die hole 41; the lower die hole 41 is communicated with the outer wall of the lower cylinder 4 through a second air hole 46; the circular block 8 is composed of a central round bar 81 and surrounding round sleeves 82; the round bar 81 is movably and sealingly connected with the round sleeves 82; the number of the round sleeves 82 is multiple; and the multiple round sleeves 82 are movably and sealingly connected with each other.

[0035] In this embodiment, the aperture of the second air hole 46 is set to increase as it is farther away from the lower die hole 41; the aperture of the first air hole 45 is set to increase as it is farther away from the circular groove 44.

[0036] During the process of breaking the workpiece at the lower end of the upper cylinder 6 and squeezing the reset block 42, the reset block 42 will move downward against the elastic force of the lower spring 43. The reset block 42 will squeeze the gas in the lower die hole 41, increasing the gas pressure in the lower die hole 41. Since the aperture of the second air hole 46 is smaller at the end close to the lower die hole 41, the gas in the lower die hole 41 discharges along the second air hole 46 at a limited speed, keeping a certain gas pressure in the lower die hole 41. Since the aperture of the second air hole 46 increases as it moves away from the circular groove 44, the gas in the lower die hole 41 is more likely to enter the circular groove 44. Thus, the circular block 8 in the circular groove 44 extends out of the circular groove 44 under the action of air pressure. Since the circular block 8 is composed of multiple circular sleeves 82 and a circular rod 81, the multiple circular sleeves 82 and the circular rod 81 in the circular block 8 are staggered in the vertical direction, making the upper end of the circular block 8 conical. The conical circular block 8 supports the hole material in the blind hole, minimizing the bending of the hole material during the punching process at the lower end of the upper cylinder 6, causing the hole material to turn downward while adhering to the lower surface of the upper cylinder 6. After the blind hole is formed, the upper cylinder 6 moves upward to leave the blind hole, and the lower spring 43 pushes the reset block 42 upward. Since the aperture of the second air hole 46 increases as it moves away from the lower die hole 41, the speed of the outside gas entering the lower die hole 41 along the second air hole 46 is greater than the speed of the gas in the lower die hole 41 discharging along the second air hole 46. Thus, the reset block 42 can have a faster upward movement speed, enabling the reset block 42 to push the hole material upward faster. Since the aperture of the first air hole 45 increases as it moves away from the circular groove 44, the speed of the gas in the circular groove 44 entering the lower die hole 41 along the first air hole 45 is less than the speed of the gas in the lower die hole 41 entering the circular groove 44, keeping the upper end of the circular block 8 conical while the gas in the circular groove 44 flows out at a slower speed. In this embodiment, the overall shape of the circular block 8 is cylindrical, and the conical upper end of the circular block 8 moves upward as the reset block 42 moves upward, enabling the circular block 8 protruding from the upper surface of the reset block 42 to push the hole material over the blind hole. Thus, after the hole material is pushed over the blind hole, the hole material will reset under its own elastic force and return to the hole material again. The gas in the circular groove 44 will gradually return to the lower die hole 41, and the upper end of the circular block 8 will return to a flat state to accommodate the placement of a new workpiece;In this embodiment, the downward movement of the upper cylinder 6 is completed instantaneously. Therefore, the air pressure in the lower die hole 41 instantaneously increases under the action of the downward-moving reset block 42. As a result, there is sufficient air pressure in the circular groove 44 for the circular block 8 to abut against the lower surface of the hole material. To ensure the supporting effect of the circular block 8 on the hole material in the blind hole, the second air hole 46 can be connected to a gas pumping device, such as a miniature dual-purpose pumping pump. When the upper cylinder 6 moves downward, the gas pumping device supplies gas to the lower die hole 41 and the circular groove 44 to ensure the overall supporting effect of the circular block 8 on the hole material in the blind hole. When the upper cylinder 6 moves upward, the gas pumping device evacuates the lower die hole 41 and the circular groove 44, which helps the rapid reset of the circular block 8. It should be noted that during a single punching process, the gas supply and evacuation volumes need to be the same, and the gas supply pressure is less than the punching force of the upper cylinder 6. This means can be achieved through a controller or control program in the prior art, and the present invention will not elaborate too much on it. During actual use, a gas pumping device can be selected according to the material and thickness of the metal switch housing, as well as the punching speed of the blind hole, etc., to improve the actual applicable range of the present invention for processing the blind hole of the metal switch housing. When selecting a gas pumping device, it is connected to the second air hole 46 through a trachea. Therefore, the present invention does not limit the specific position and number of the second air holes 46. For example, when the second air hole 46 is in use, the number is two, and it is connected to the gas supply end and the gas evacuation end of the gas pumping device through tracheas. As for the position of the second air hole 46, as long as it does not affect the punching of the blind hole; that is, in this embodiment, the reset block 42 generates the gas pressure in the lower die hole 41 as the upper cylinder 6 moves downward. Of course, a gas pumping device can also be used, so that the upper end of the circular block 8 forms a conical shape to tightly press the hole material against the lower surface of the upper cylinder 6, maximizing the reduction of the deformation of the hole material after being cut out of the blind hole and maximizing the flatness of the hole material, so that the hole material is more matched after returning to the blind hole; in this embodiment, if the hole material is controlled to move upward and return to the blind hole position, after the workpiece is removed, the hole material will move downward and turn out of the blind hole due to its own elasticity. Therefore, the hole material needs to cross the blind hole under the push of the reset block 42 in order to keep the hole material exactly in the blind hole under the subsequent elastic force, and further make the punched workpiece more flat.

[0037] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the attached Figure 2 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0038] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A blind hole processing device for a switch housing, characterized in that: The upper surface of the workbench of the punching machine is fixedly connected to the lower pressing plate; the upper surface of the lower pressing plate is evenly provided with lower adjustment holes; the lower end of the lower cylinder is inserted into the lower adjustment hole; the upper surface of the lower cylinder is provided with a lower die hole; the aperture of the lower die hole is adapted to the aperture of the hole to be punched; the output shaft of the punching machine is fixedly connected to the upper pressing plate located directly above the lower pressing plate; the lower surface of the upper pressing plate is evenly provided with upper adjustment holes; the upper end of the upper cylinder is inserted into the upper adjustment hole; the outer diameter of the upper cylinder is adapted to the aperture of the hole to be punched; the lower end face of the upper cylinder is inclined; the upper cylinder is located directly above the corresponding lower cylinder, and adapted to the hole position of the hole to be punched on the workpiece.

2. A blind hole processing device for a switch housing according to claim 1, characterized in that: The upper position of the upper cylindrical outer wall is connected to the upper support ring; the upper cylindrical outer wall is slidably connected to the clamping sleeve; the upper end of the clamping sleeve is connected to the lower surface of the upper support ring through an upper spring.

3. A blind hole processing device for a switch housing according to claim 2, characterized in that: A reset block is slidably connected in the lower die hole; the lower surface of the reset block is connected to the bottom of the lower die hole through a lower spring.

4. The blind hole processing device for a switch housing according to claim 1, characterized in that: The inner walls of the upper adjustment hole and the lower adjustment hole are provided with arc grooves; the depth of the arc grooves decreases successively in the circumferential direction; the outer wall of the upper cylinder near the upper end and the outer wall of the lower cylinder near the lower end are provided with grooves; a clamping block is slidably connected in the groove; the clamping block is connected to the bottom of the groove by a first spring.

5. The blind hole processing device for a switch housing according to claim 4, characterized in that: The end of the clamping block away from the groove bottom is obliquely provided with a guide surface facing the corresponding arc groove.

6. The blind hole processing device for a switch housing according to claim 4, characterized in that: The upper adjusting hole and the lower adjusting hole are elastically and slidably connected with the anti-blocking block.

7. A blind hole processing device for a switch housing according to claim 6, characterized in that: The bottoms of the plurality of upper regulating holes are interconnected and filled with liquid medium; the bottoms of the plurality of lower regulating holes are interconnected and filled with liquid medium.

8. The blind hole processing device for a switch housing according to claim 3, characterized in that: A circular groove is provided on the upper surface of the reset block; the circular groove is movably sealed with a circular block; the bottom of the circular groove is connected to the lower surface of the reset block through a first air hole; the reset block is movably sealed with the lower die hole; the lower die hole is connected to the outer wall of the lower cylinder through a second air hole; the circular block is composed of a central round rod and surrounding round sleeves; the round rod is movably sealed with the round sleeve; there are multiple round sleeves; and the multiple round sleeves are movably sealed with each other.

9. A blind hole processing device for a switch housing according to claim 8, characterized in that: The aperture of the second air hole is increased as it is away from the lower die hole; the aperture of the first air hole is increased as it is away from the circular groove.

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