A bending device for numerical control machine tool shell processing

Abstract

The utility model relates to the technical field of bending device, and disclose a kind of bending device for numerical control machine tool shell processing, and the accurate positioning of upper die cutter is realized by setting upper die cutter, pin hole, positioning device, piston pin head and other structures, by the injection of compressed air to main gas path inside by external air compressor, make compressed air pass through the transmission of gas distribution groove and enter piston cylinder A inside, compressed air extrudes piston pin head, and piston pin head is inserted into pin hole inside by moving downward, if the position of upper die cutter exists deviation, piston pin head will first contact with the inner wall of pin hole, and the position of upper die cutter is straightened, after complete mould closing between piston pin head and pin hole, the position of upper die cutter is fixed, improve the positioning accuracy of upper die cutter, and the accurate positioning effect of upper die cutter is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bending device technology, and in particular to a bending device for machining the housing of CNC machine tools. Background Technology

[0002] A bending machine is a machine that can bend thin plates. Its structure mainly includes a support, a worktable and a clamping plate. The worktable is placed on the support and consists of a base and a pressure plate. The base is connected to the clamping plate by a hinge. The base consists of a housing, a coil and a cover plate. The coil is placed in the recess of the housing and the top of the recess is covered by the cover plate.

[0003] According to a utility model patent with publication number CN222607624U, a bending device for processing sheet metal for machine tool housings includes a bending machine. The bending machine has a height-adjustable lower die holder. An upper grinding tool is mounted on the bottom wall of the lower die holder. A positioning limit baffle and a mounting box are fixedly installed on the bottom wall of the lower die holder. The mounting box is hollow and L-shaped. A clamping positioning plate is mounted on the horizontal end of the mounting box. The upper grinding tool is located between the limit baffle and the positioning clamp. When it is necessary to disassemble the upper grinding tool, the transmission worm gear is rotated forward. The transmission worm gear drives multiple transmission worm wheels to rotate forward, multiple connecting sleeves begin to rotate forward, and multiple distance adjustment rods rotate synchronously forward. Since multiple distance adjustment rods are threadedly connected to the connecting baffle, the multiple distance adjustment rods move forward with the positioning clamp until the positioning clamp and the upper grinding tool separate.

[0004] In the aforementioned patent, the positioning of the upper mold cutter is achieved by rotating the connecting sleeve through a transmission worm gear, followed by clamping the cutter through the movement of the distance adjustment rod. However, it is not possible to position and clamp the cutter before disassembly or installation. Furthermore, the transmission worm gear needs to be manually twisted during the fixing and disassembly process, and then the transmission worm gear drives the transmission worm wheel. Mechanical force is lost during the transmission. The above solution uses multi-stage transmission operation to clamp the upper mold cutter, which results in a cumbersome disassembly and assembly process. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a bending device for machining the housing of CNC machine tools, which has the advantages of automatic calibration, high positioning accuracy, pneumatic clamping, and quick replacement, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a bending device for machining the shell of a CNC machine tool, comprising a bending machine, a lower die frame movably mounted in the middle of the bending machine, a servo motor symmetrically fixedly mounted on one side of the bending machine above the lower die frame, a horizontal plate provided on one side of the bending machine between the servo motor and the lower die frame, a lead screw being driven between the output shaft of the servo motor and the horizontal plate via a coupling, the lead screw being rotatably mounted on the surface of the horizontal plate, a moving block being slidably mounted between the outer rings of the lead screw, a sliding sleeve being provided inside the moving block on the outer ring of the lead screw, balls being evenly distributed between the sliding sleeve and the lead screw, a tool holder being fixedly mounted at the bottom of the moving block, an upper die tool being engaged inside the tool holder, and a positioning device and a quick-change device being provided inside the bending machine.

[0007] Through the above structural design, the cooperation between the tool holder and the quick-change device enables the rapid clamping and replacement of the upper die tool. The cooperation between the positioning device and the upper die tool ensures precise positioning of the upper die tool during installation.

[0008] Preferably, the tool holder has a locking slot inside, and the inner wall of the locking slot has symmetrical sliding grooves. A limiting block is slidably installed in the locking slot. The limiting block has a locking tongue evenly arranged in a linear array on its inclined surface. The end of the locking tongue is tapered. The limiting block has straight slots evenly arranged in a linear array inside. The limiting block has ear posts on both sides. The ear posts are slidably installed inside the sliding grooves. The size and shape of the ear posts and the sliding grooves are compatible.

[0009] With the above structural setup, the limiting block slides obliquely due to the force pulled by the piston rod. The oblique surface of the limiting block slowly approaches the oblique surface of the upper die cutter, while the locking tongue inserts into the lock hole.

[0010] Preferably, the upper die cutter is movably installed inside the die holder, and the inclined surface of the upper die cutter is provided with locking holes in a linear array. The locking holes are adapted to the shape and size of the locking tongue. The top of the upper die cutter is provided with pin holes in a linear array, and the pin holes are tapered grooves.

[0011] With the above structural design, the upper die cutter is positioned by the interplay between the locking hole and the locking tongue, ensuring stable clamping of the upper die cutter during operation. The pin hole and the piston pin head are also interplay to achieve precise positioning of the upper die cutter.

[0012] Preferably, the positioning device includes a main air passage and a piston cylinder A. The main air passage is vertically opened in the middle of the moving block. The piston cylinder A is arranged in a linear array inside the moving block. An air distribution groove is opened between the piston cylinder A and the main air passage. A piston pin head is slidably installed inside the piston cylinder A. The end of the piston pin head is tapered. The position of the piston pin head and the pin hole correspond to each other. The shape and size of the piston pin head and the pin hole are compatible.

[0013] With the above structural design, after the piston pin head is squeezed, its end moves downward and slowly inserts into the pin hole. Through the contact between the end of the piston pin head and the inner wall of the pin hole, the displacement of the upper die cutter is adjusted.

[0014] Preferably, the quick-change device includes an air groove and a piston cylinder B. The air groove is vertically opened in the middle of the moving block and located on one side of the main air passage. The piston cylinders B are arranged in a linear array inside the moving block on one side of the piston cylinder A. A pressure-dispersing groove is opened between the piston cylinder B and the air groove. A piston column is slidably installed inside the pressure-dispersing groove. The end of the piston column is movably installed inside the straight groove opening. An air hole is opened between the inner wall of the piston cylinder B and the surface of the moving block.

[0015] With the above structural design, when the limiting block moves, the locking tongue and the locking hole slowly close the mold, and the inclined surface of the limiting block moves closer to the side of the upper mold cutter. After the locking tongue and the locking hole close the mold, the position of the upper mold cutter is tightly squeezed and restricted by the limiting block.

[0016] This utility model has the following advantages:

[0017] 1. This bending device for machining the housing of CNC machine tools achieves precise positioning of the upper die cutter by setting up structures such as an upper die cutter, pin hole, positioning device, and piston pin head. Compressed air is injected into the main air circuit by an external air compressor, and the compressed air enters the piston cylinder A through the air diffuser. The compressed air compresses the piston pin head, causing it to move downward and insert into the pin hole. If the position of the upper die cutter is offset, the piston pin head will first contact the inner wall of the pin hole to correct the position of the upper die cutter. When the piston pin head and the pin hole are fully closed, the position of the upper die cutter is fixed, which improves the positioning accuracy of the upper die cutter and achieves the effect of precise positioning of the upper die cutter.

[0018] 2. This bending device for CNC machine tool housing processing enables rapid disassembly and replacement of the upper die cutter through the inclusion of an upper die cutter, locking hole, quick-change device, and piston column. Air is drawn from the air groove, creating a negative pressure state inside the piston cylinder and pressure-dissipating groove. Due to this negative pressure, the piston column moves upwards. During this movement, its end moves along with a limiting block. As the limiting block moves, the locking tongue gradually closes with the locking hole. Once the locking tongue and locking hole are fully closed, the inclined surface of the limiting block presses against the side of the upper die cutter. The locking tongue and the inclined surface of the limiting block fix the position of the upper die cutter. During disassembly, the air pressure inside the piston cylinder and air groove is released, causing the piston column to move downwards. Since the piston column no longer pulls the limiting block, the limiting block slowly slides obliquely along the slide groove, allowing the locking tongue and the limiting block to no longer restrict the position of the upper die cutter, thus achieving rapid replacement of the upper die cutter. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the movable block of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the tool holder of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the positioning device of this utility model;

[0023] Figure 5 This is a schematic diagram of the internal structure of the upper die cutter of this utility model;

[0024] Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0025] In the diagram: 1. Bending machine; 11. Lower die holder; 2. Servo motor; 21. Lead screw; 3. Moving block; 31. Sliding sleeve; 4. Tool holder; 41. Locking block groove; 42. Sliding groove; 43. Limiting block; 44. Locking tongue; 45. Straight groove opening; 46. Ear post; 5. Upper die cutter; 51. Locking hole; 52. Pin hole; 6. Positioning device; 61. Piston cylinder A; 62. Air dissipation groove; 63. Piston pin head; 7. Quick change device; 71. Piston cylinder; 72. Pressure dissipation groove; 73. Piston column; 74. Air hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-3 A bending device for machining the housing of a CNC machine tool includes a bending machine 1. A lower die frame 11 is movably mounted in the middle of the bending machine 1. A servo motor 2 is symmetrically fixedly mounted on one side of the bending machine 1 above the lower die frame 11. A horizontal plate is provided on one side of the bending machine 1 between the servo motor 2 and the lower die frame 11. The output shaft of the servo motor 2 is connected to the horizontal plate via a coupling, and a lead screw 21 is rotatably mounted on the surface of the horizontal plate. A moving block 3 is slidably mounted between the outer rings of the lead screw 21. Inside the moving block 3, a sliding sleeve 31 is provided on the outer ring of the lead screw 21. Balls are evenly arranged between the sliding sleeve 31 and the lead screw 21, so that the lead screw 21 and the sliding sleeve 31 form a ball screw. The ball screw is a mature existing technology and will not be described in detail in this application. A knife holder 4 is fixedly installed at the bottom of the moving block 3. The upper die knife 5 is snapped into the inside of the knife holder 4. The bending machine 1 is provided with a positioning device 6 and a quick change device 7. Both the positioning device 6 and the quick change device 7 are connected to an external air compressor and a vacuum generator.

[0028] In practical applications, this device achieves rapid clamping and replacement of the upper die cutter 5 through the cooperation of the cutter holder 4 and the quick-change device 7. Compressed air is injected into the air groove and evenly injected into the piston cylinder B71 through the pressure dispersing groove 72, compressing the piston rod 73. This causes the end of the piston rod 73 to slide downwards within the straight groove 45. Since the limiting block 43 is no longer pulled by the piston rod 73, it slides under gravity through the ear post 46 into the locking slot 41 within the sliding groove 42, thus releasing the positional restriction on the upper die cutter 5. Subsequently, this unlocking and positioning device 6 is used to lock the upper die cutter 5. The upper die cutter 5 can be slid out from the inside of the cutter holder 4. After replacing the upper die cutter 5, the air inside the air groove is extracted, creating negative pressure inside the piston cylinder B71 and the pressure dissipation groove 72. This causes the piston column 73 to be attracted upward by the air pressure, and the end of the piston column 73 drives the limiting block 43 to move upward. Since the movement path of the limiting block 43 is restricted by the slide groove 42, it can only slide obliquely inside the slide groove 42. This allows the limiting block 43 to move and press against the side of the upper die cutter 5, and the locking tongue 44 to be inserted into the lock hole 51, thus fixing the position of the upper die cutter 5. This achieves the effect of quick installation and disassembly.

[0029] By setting up the positioning device 6 and the upper die cutter 5 to cooperate with each other, the upper die cutter 5 is accurately positioned during installation. When the upper die cutter 5 is first installed inside the cutter holder 4, the length of the upper die cutter 5 varies, and the position of movement may be long or short. At this time, compressed air is injected into the main air circuit through the air compressor. The compressed air is transmitted into the piston cylinder A61 through the air diffuser 62, which compresses the position of the piston pin head 63 and inserts the end of the piston pin head 63 into the pin hole 52. Since the end of the piston pin head 63 is conical, if the position of the upper die cutter 5 is deviated, the piston pin head 63 will push against the inner wall of the pin hole 52 to correct the position of the upper die cutter 5. When the piston pin head 63 is fully inserted into the pin hole 52, the position of the upper die cutter 5 is accurately positioned and restricted, so that the position of the upper die cutter 5 cannot be offset inside the cutter holder 4.

[0030] Please see Figures 1-6 The tool holder 4 has a locking slot 41 inside, and a sliding groove 42 is symmetrically opened on the inner wall of the locking slot 41. A limiting block 43 is slidably installed in the locking slot 41. The limiting block 43 has a locking tongue 44 evenly arranged in a linear array on the inclined surface. The end of the locking tongue 44 is tapered. The limiting block 43 has a straight slot 45 evenly arranged in a linear array inside. The limiting block 43 has ear posts 46 on both sides. The ear posts 46 are slidably installed in the sliding groove 42. The size and shape of the ear posts 46 and the sliding groove 42 are compatible.

[0031] Due to the restriction of the two side ear pillars 46, the limiting block 43 can only slide obliquely inside the slide groove 42. During the process of the limiting block 43 being driven by the quick-change device 7, the limiting block 43 slides obliquely due to the pulling force of the piston 73. The oblique surface of the limiting block 43 slowly approaches the oblique surface of the upper die cutter 5. At the same time, the locking tongue 44 will be inserted into the locking hole 51. When the locking tongue 44 and the locking hole 51 are completely closed, the oblique surface of the limiting block 43 is tightly attached to the side of the upper die cutter 5, thereby tightly limiting the position of the upper die cutter 5 and making the position of the upper die cutter 5 stable during operation.

[0032] Please see Figures 1-6 The upper die cutter 5 is movably installed inside the cutter holder 4. The inclined surface of the upper die cutter 5 is provided with lock holes 51 in a linear array. The lock holes 51 and the lock tongue 44 are matched in shape and size. The top of the upper die cutter 5 is provided with pin holes 52 in a linear array. The pin holes 52 are tapered grooves.

[0033] The upper die cutter 5 is positioned by the interplay between the locking hole 51 and the locking tongue 44, ensuring that the upper die cutter 5 is stably clamped during operation. The pin hole 52 and the piston pin head 63 are interplay to achieve precise positioning of the upper die cutter 5, preventing positional deviation during installation or operation, improving the positioning accuracy of the upper die cutter 5, and eliminating coaxiality errors between the upper die cutter 5 and the cutter holder 4.

[0034] Please see Figures 1-4 The positioning device 6 includes a main air passage and a piston cylinder A61. The main air passage is vertically opened in the middle of the moving block 3. The piston cylinder A61 is arranged in a linear array inside the moving block 3. An air dispersing groove 62 is opened between the piston cylinder A61 and the main air passage. A piston pin head 63 is slidably installed inside the piston cylinder A61. The end of the piston pin head 63 is tapered. The position of the piston pin head 63 corresponds to that of the pin hole 52. The shape and size of the piston pin head 63 and the pin hole 52 are compatible.

[0035] The positioning device 6 is connected to external equipment through the main air passage. By supplying compressed air into the main air passage, the compressed air is transmitted through the air diffuser 62 to squeeze the piston pin head 63. After being squeezed, the end of the piston pin head 63 moves downward and slowly inserts into the pin hole 52. Through the contact between the end of the piston pin head 63 and the inner wall of the pin hole 52, the displacement of the upper die cutter 5 is adjusted, so that the pin hole 52 and the piston pin head 63 are completely closed, thereby improving the positioning accuracy of the upper die cutter 5 and preventing the position of the upper die cutter 5 from shifting.

[0036] Please see Figures 1-6 The quick-change device 7 includes an air groove and a piston cylinder B71. The air groove is vertically opened in the middle of the moving block 3, located on one side of the main air passage. Inside the moving block 3, on one side of the piston cylinder A61, the piston cylinders B71 are arranged in a linear array. A pressure-dispersing groove 72 is opened between the piston cylinder B71 and the air groove. A piston column 73 is slidably installed inside the pressure-dispersing groove 72. The end of the piston column 73 is movably installed inside the straight groove 45. The end of the piston column 73 is engaged with the opening of the straight groove 45. The piston column 73 and the inside of the straight groove 45 form an engaged state, and the piston column 73 cannot be moved out of the straight groove 45. When the piston cylinder 73 moves upward, it can drive the limiting block to move upward by its end being engaged with the opening of the straight groove 45. When the piston cylinder 73 moves downward, the end of the piston column 73 first disengages from the contact with the opening of the straight groove 45 and falls vertically. An air hole 74 is opened between the inner wall of the piston cylinder B71 and the surface of the moving block 3.

[0037] In actual use, the quick-change device 7 injects or draws air into the air groove, causing the piston column 73 to move up and down inside the piston cylinder B71. Because the piston column 73 moves vertically, but its end is located at the bottom of the straight groove 45, when the piston column 73 moves upward, the piston column 73 drives the limiting block 43 to move as a whole through its end. Since the straight groove 45 has a clearance, and the ear column 46 is restricted by the slide groove 42, the limiting block 43 slides obliquely. When the limiting block 43 moves, the locking tongue 44 and the locking hole 51 slowly close the mold, and the oblique surface of the limiting block 43 moves closer to the side of the upper mold cutter 5. After the locking tongue 44 and the locking hole 51 close the mold, the position of the upper mold cutter 5 is tightly squeezed and restricted by the limiting block 43.

[0038] Working Principle: In use, the upper die cutter 5, which requires the specified dimensions and model, is inserted into the die holder 4, ensuring its position is near the ideal location, without significant deviation. The end of the upper die cutter 5 has a certain amount of play within the die holder 4, but will not fall out. At this point, compressed air is injected into the main air circuit via an external air compressor. This compressed air is then transmitted through the air diffuser 62 into the piston cylinder A61. The compressed air compresses the piston pin head 63, causing it to move downwards and insert into the pin hole 52. If the upper die cutter 5 is misaligned, the piston pin head 63 will first contact the inner wall of the pin hole 52, correcting its position. Once the piston pin head 63 and pin hole 52 are fully closed, the position of the upper die cutter 5 is fixed, improving its positioning accuracy. Subsequently, an external vacuum generator... The device draws air from the air groove, creating a negative pressure state inside the piston cylinder B71 and the pressure dissipation groove 72. At this time, the piston column 73 moves upward due to the negative pressure. During the movement, the end of the piston column 73 drives the limiting block 43 to move together. Since the position of the limiting block 43 is restricted by the sliding groove 42, it can only slide obliquely. Therefore, after being pulled by the piston column 73, the limiting block 43 slowly approaches the locking hole 51. During the movement of the limiting block 43, the locking tongue 44 gradually closes with the locking hole 51. After the locking tongue 44 and the locking hole 51 are completely closed, the inclined surface of the limiting block 43 is pressed against the side of the upper die cutter 5. The upper die cutter 5 is fixed in position by the pressure of the locking tongue 44 and the inclined surface of the limiting block 43. At the same time, the upper die cutter 5 maintains a good stable state during operation because it is restricted by the piston pin head 63 and the locking tongue 44.

[0039] When it is necessary to replace the upper die cutter 5 with one of different size and model, first depressurize the piston cylinder B71 and the air groove, causing the piston column 73 to move downward. Since the piston column 73 no longer pulls the limiting block 43, the limiting block 43 slides slowly obliquely along the slide groove 42, so that the locking tongue 44 and the limiting block 43 no longer restrict the position of the upper die cutter 5. Then, the air inside the main air circuit is sucked in, creating a negative pressure inside the piston cylinder A61, which causes the piston pin head 63 to move upward. Once the piston pin head 63 is disengaged from the pin hole 52, the upper die cutter 5 can be slid to the position inside the cutter holder 4. After disassembly, a new upper die cutter 5 can be replaced. By following the installation steps, the positioning device 6 and the quick-change device 7 can be used to limit the upper die cutter 5 in sequence, achieving the effect of quick installation and replacement.

Claims

1. A bending device for machining the housing of a CNC machine tool, comprising a bending machine (1), characterized in that: The bending machine (1) has a lower die frame (11) movably installed in the middle. A servo motor (2) is symmetrically fixedly installed on one side of the bending machine (1) above the lower die frame (11). A horizontal plate is provided on one side of the bending machine (1) between the servo motor (2) and the lower die frame (11). The output shaft of the servo motor (2) is connected to the horizontal plate through a coupling. The lead screw (21) is rotatably installed on the surface of the horizontal plate. A moving block (3) is slidably installed between the outer rings of the lead screw (21). A sliding sleeve (31) is provided inside the moving block (3) on the outer ring of the lead screw (21). Ball bearings are evenly provided between the sliding sleeve (31) and the lead screw (21). A knife holder (4) is fixedly installed at the bottom of the moving block (3). An upper die knife (5) is snapped into the inside of the knife holder (4). A positioning device (6) and a quick change device (7) are respectively provided inside the bending machine (1).

2. The bending device for machining the housing of a CNC machine tool according to claim 1, characterized in that: The tool holder (4) has a locking slot (41) inside. The inner wall of the locking slot (41) has symmetrical sliding grooves (42). The locking slot (41) is slidably installed with a limiting block (43). The inclined surface of the limiting block (43) is uniformly provided with a locking tongue (44). The end of the locking tongue (44) is conical. The interior of the limiting block (43) is uniformly provided with a straight slot (45) in a linear array. The limiting block (43) has ear posts (46) on both sides. The ear posts (46) are slidably installed inside the sliding groove (42). The size and shape of the ear posts (46) and the sliding groove (42) are compatible.

3. A bending device for machining the housing of a CNC machine tool according to claim 2, characterized in that: The upper die cutter (5) is movably installed inside the cutter holder (4). The inclined surface of the upper die cutter (5) is provided with lock holes (51) in a linear array. The lock holes (51) and the lock tongue (44) are matched in shape and size. The top of the upper die cutter (5) is provided with pin holes (52) in a linear array. The pin holes (52) are tapered grooves.

4. A bending device for machining the housing of a CNC machine tool according to claim 3, characterized in that: The positioning device (6) includes a main air passage and a piston cylinder A (61). The main air passage is vertically opened in the middle of the moving block (3). The piston cylinder A (61) is arranged in a linear array inside the moving block (3). An air diffuser groove (62) is opened between the piston cylinder A (61) and the main air passage. A piston pin head (63) is slidably installed inside the piston cylinder A (61). The end of the piston pin head (63) is tapered. The position of the piston pin head (63) corresponds to that of the pin hole (52). The shape and size of the piston pin head (63) and the pin hole (52) are compatible.

5. A bending device for machining the housing of a CNC machine tool according to claim 4, characterized in that: The quick-change device (7) includes an air groove and a piston cylinder B (71). The air groove is vertically opened in the middle of the moving block (3) on one side of the main air passage. The piston cylinder B (71) is arranged in a linear array on one side of the piston cylinder A (61) inside the moving block (3). A pressure-dispersing groove (72) is opened between the piston cylinder B (71) and the air groove. A piston column (73) is slidably installed inside the pressure-dispersing groove (72). The end of the piston column (73) is movably installed inside the straight groove (45). An air hole (74) is opened between the inner wall of the piston cylinder B (71) and the surface of the moving block (3).

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