A large strip machining center assembly positioning auxiliary device

Abstract

This utility model discloses an assembly and positioning auxiliary device for a large strip machining center, relating to the field of machining center technology. It includes a frame, with an adjustment mechanism fixedly installed in the middle of the frame. Limiting mechanisms are fixedly installed on both sides of the top of the adjustment mechanism, and positioning mechanisms are fixedly installed at both ends of the outer side of the limiting mechanisms. The adjustment mechanism includes a guide rail, which is fixedly installed in the middle of the inner side of the frame. A first lead screw is rotatably connected inside the guide rail. This utility model, employing the above structure, utilizes a motor-driven structure for the adjustment mechanism, positioning mechanism, and limiting mechanism. This eliminates the need for manual bolt operation during use, automating the limiting, clamping, and lateral position adjustment, significantly simplifying the operation process. This reduces labor intensity and improves positioning efficiency, solving the problems of cumbersome manual adjustment and numerous operation steps in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of machining center technology, and specifically relates to an assembly and positioning auxiliary device for a large strip machining center. Background Technology

[0002] Vertical machining centers, as high-precision machining equipment with the spindle axis perpendicular to the worktable, occupy an important position in industrial production. With their powerful machining capabilities, they can complete a variety of processes such as milling, boring, drilling, tapping, and thread cutting. They are especially suitable for machining complex parts such as plates, discs, molds, and small shells, providing strong support for the efficient machining of complex parts.

[0003] In the process of machining various parts in a vertical machining center, auxiliary positioning fixtures are a key component to ensure machining accuracy and stability. Chinese Patent No. CN222932299U discloses an auxiliary positioning fixture for a vertical machining center. This fixture includes a center frame with base plates on both sides of its bottom. Slide grooves are provided on both sides of the inner cavity of the center frame near the base plates. A slider fixedly connected to the top of the base plate is slidably installed in the slide grooves. A drive mechanism is also provided in the slide grooves. By driving the sliders, the base plates can be moved towards the center of the center frame, thus accommodating the placement of parts of different sizes and ensuring machining stability. With the help of a sliding plate and a limiting block, the positioning mechanism can be moved into the center frame to achieve positioning of parts of different sizes. Simultaneously, the scraper and collection box can clean the dust and debris generated during machining on the base plate, improving the practicality of the device to a certain extent.

[0004] However, this device still has obvious defects and shortcomings in practical applications. During use, each positioning process requires manual adjustment, and four bolts need to be operated independently to complete the positioning. The operation is cumbersome, which not only increases the labor intensity but also affects the processing efficiency. More importantly, when processing long strip-shaped workpieces, due to their large length, it is often necessary to process any position on their outer surface during the processing. This requires the workpiece to be able to frequently and flexibly adjust its lateral position on the positioning device. However, the above-mentioned device cannot meet this requirement in its design, making it difficult to achieve automatic and flexible adjustment of the position of long strip-shaped workpieces. This brings many inconveniences to the processing operation and limits its application in the processing of long strip-shaped workpieces. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide an assembly and positioning auxiliary device for large strip machining centers to solve the problems raised in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A large strip machining center assembly and positioning auxiliary device includes a frame, an adjustment mechanism fixedly installed in the middle of the frame, limit mechanisms fixedly installed on both sides of the top of the adjustment mechanism, and positioning mechanisms fixedly installed at both ends of the outer side of the limit mechanisms.

[0008] The adjustment mechanism includes a guide rail, which is fixedly installed in the middle of the inner side of the frame. A first lead screw is rotatably connected inside the guide rail. The two ends of the first lead screw have opposite threads. Both ends of the first lead screw are threadedly connected to movable blocks. The top of the movable blocks is connected to the bottom of the limiting mechanism. A first motor is fixedly installed at one end of the guide rail. The output end of the first motor is connected to the end of the first lead screw.

[0009] As a preferred technical solution, the side of the movable block is convex in shape, the internal cavity of the guide rail is also convex in shape, and the outer corners of the frame are rounded.

[0010] As a preferred technical solution, support legs are fixedly installed at the four bottom corners of the frame, and mounting frames are fixedly installed at the bottom of the support legs.

[0011] As a preferred technical solution, mounting holes are provided in the middle of both sides and the middle of both ends of the mounting frame. The mounting holes are countersunk holes, and the outer corners of the mounting frame are also rounded.

[0012] As a preferred technical solution, the limiting mechanism includes a clamp, which is fixedly installed on the top of the movable block. Worm gears are rotatably connected to the bottom of the clamp in a linear arrangement at equal intervals. Side plates are fixedly installed at both ends of the clamp. Worms are rotatably connected to the inner side of the side plates. The worms and worm gears are mutually connected through transmission. Drive wheels are rotatably connected to the top of the clamp in a linear arrangement at equal intervals. The bottom of the drive wheels is connected to the top of the worm gears through a coupling. A second motor is fixedly installed on the outer side of one side plate. The output end of the second motor is fixedly connected to the end of the worm gear.

[0013] As a preferred technical solution, the positioning mechanism includes a side rail, which is fixedly installed at both outer ends. A third motor is fixedly installed on the top of the side rail. A second lead screw is fixedly installed through the output end of the third motor and threadedly connected to the outer surface of the second lead screw. The sliding block is slidably connected to the inside of the side rail. A clamping arm is fixedly installed on the inner side of the sliding block, and an upper pressure plate is fixedly installed at the bottom of the clamping arm.

[0014] As a preferred technical solution, the bottom of the upper pressure plate is rotatably connected with balls arranged linearly at equal intervals, and the top inner side of the clamp is also rotatably connected with balls arranged linearly at equal intervals.

[0015] In summary, the present invention has the following main advantages:

[0016] First, during the application of this device, the motor drive structure with adjustment mechanism, positioning mechanism and limit mechanism makes it possible to automate the limit, clamping and lateral position adjustment without manual operation of bolts during use, which greatly simplifies the operation process and thus reduces labor intensity and improves positioning efficiency, solving the problem of cumbersome manual adjustment and many operation steps in the background technology.

[0017] Secondly, during the application of this device, by setting up a reverse threaded lead screw, a convex movable block and guide rail, ball bearings and drive wheel assembly, it can adapt to workpieces of different lengths during use, ensuring uniform clamping force and high positioning accuracy, and can flexibly adjust the lateral position of long strip workpieces, thereby achieving the effect of improving processing stability and adaptability, and solving the problems of inconvenient device adjustment and positioning deviation in the background technology. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 This is a bottom view schematic diagram of the limiting mechanism and positioning mechanism of this utility model;

[0021] Figure 4 This is a top view schematic diagram of the limiting mechanism and positioning mechanism of this utility model.

[0022] Reference numerals: 1. Frame; 2. Adjustment mechanism; 21. Guide rail; 22. First lead screw; 23. Movable block; 24. First motor; 3. Limiting mechanism; 31. Clamp; 32. Worm gear; 33. Side plate; 34. Worm; 35. Drive wheel; 36. Second motor; 4. Positioning mechanism; 41. Side rail; 42. Third motor; 43. Second lead screw; 44. Sliding block; 45. Clamping arm; 46. Upper pressure plate; 47. Ball bearing; 5. Support leg; 6. Mounting frame; 7. Mounting hole. Detailed Implementation

[0023] Example

[0024] refer to Figures 1 to 3 This embodiment of a large strip machining center assembly positioning auxiliary device includes a frame 1, an adjustment mechanism 2 fixedly installed in the middle of the frame 1, a limit mechanism 3 fixedly installed on both sides of the top of the adjustment mechanism 2, and a positioning mechanism 4 fixedly installed at both ends of the outer side of the limit mechanism 3.

[0025] The adjustment mechanism 2 includes a guide rail 21, which is fixedly installed in the middle of the inner side of the frame 1. A first lead screw 22 is rotatably connected inside the guide rail 21. The two ends of the first lead screw 22 have opposite threads, and both ends of the first lead screw 22 are threadedly connected to movable blocks 23. The top of the movable blocks 23 is connected to the bottom of the limiting mechanism 3. A first motor 24 is fixedly installed at one end of the guide rail 21, and the output end of the first motor 24 is connected to the end of the first lead screw 22. During the application of this device, the adjustment mechanism 2 in the middle of the frame 1 serves as the core driving component. The first lead screw 22 inside the guide rail 21 rotates under the drive of the first motor 24. Because the two ends of the first lead screw 22 have opposite threads, the movable blocks 23 threaded at both ends will slide towards or away from each other along the guide rail 21. The movable blocks 23 drive the limiting mechanism 3 at the top to move synchronously. The distance between the two limiting mechanisms 3 is adjusted to accommodate the length of the workpiece. The positioning mechanisms 4 at both ends of the limiting mechanism 3 further fix the workpiece after the adjustment mechanism 2 completes the initial adjustment, realizing the overall assembly positioning auxiliary process. It can be seen that the adjustment mechanism 2 of this device drives the first lead screw 22 through the first motor 24. Utilizing the reverse thread characteristics at both ends of the lead screw, the movable block 23 drives the limiting mechanism 3 to accurately adjust the distance, which can adapt to large strip workpieces of different lengths and ensure the initial alignment accuracy when placing the workpiece. The frame 1 provides stable support for the entire device, integrating the adjustment mechanism 2, the limiting mechanism 3 and the positioning mechanism 4 into a whole, ensuring the positional stability of each mechanism during the working process. Through the coordinated cooperation of each mechanism, reliable assistance is provided for the assembly positioning of large strip workpieces, improving positioning efficiency and accuracy.

[0026] refer to Figures 2-4The movable block 23 has a convex shape on its side, and the internal cavity of the guide rail 21 also has a convex shape. The outer corners of the frame 1 are rounded. Support legs 5 are fixedly installed at the four corners of the bottom of the frame 1. Mounting frames 6 are fixedly installed at the bottom of the support legs 5. Mounting holes 7 are provided in the middle of both sides and the middle of the front and rear ends of the mounting frame 6. The mounting holes 7 are countersunk holes. The outer corners of the mounting frame 6 are also rounded. During the application of this device, the convex side of the movable block 23 is adapted to the convex internal cavity of the guide rail 21. When the first motor 24 drives the first lead screw 22 to rotate, the movable block 23 can slide stably along the guide rail 21, driving the limiting mechanism 3 to adjust the spacing. The frame 1 is supported by the support legs 5 at the four corners of the bottom and the support legs 5 at the four corners of the bottom. The mounting frame 6 is fixed in place, and the countersunk holes in the mounting frame 6 are used to insert bolts to fix the entire device. The rounded design of the outer corners ensures operational safety. The whole structure works together to assist in the positioning of the workpiece. During use, the cooperation between the convex movable block 23 and the cavity of the guide rail 21 restricts the offset and rotation of the movable block 23 when it slides, ensuring the linear accuracy of the adjustment mechanism 2 driving the limit mechanism 3 and improving the positioning stability. The bottom support leg 5 of the frame 1 supports the overall structure. The mounting holes 7 of the mounting frame 6 and the countersunk holes facilitate a stable connection between the device and the machining center and prevent displacement during operation. The rounded outer corners of the frame 1 and the mounting frame 6 prevent personnel from being injured by collisions during operation and ensure safe use. All the structures work together to achieve stable positioning assistance for large strip-shaped workpieces.

[0027] refer to Figures 1-3The limiting mechanism 3 includes a clamp 31, which is fixedly installed on the top of the movable block 23. Worm gears 32 are rotatably connected to the bottom of the clamp 31 in a linear arrangement at equal intervals. Side plates 33 are fixedly installed at both ends of the clamp 31. Worms 34 are rotatably connected to the inner side of the side plates 33, and the worm gears 34 and worm wheels 32 are mutually connected. Drive wheels 35 are rotatably connected to the top of the clamp 31 in a linear arrangement at equal intervals. The bottom of the drive wheels 35 is connected to the top of the worm wheels 32 via a coupling. A second motor 36 is fixedly installed on the outer side of one side plate 33, and the output end of the second motor 36 is fixedly connected to the end of the worm gear 34. The positioning mechanism 4 includes a side rail 41. Side rail 41 is fixedly installed at both ends of the outer side. A third motor 42 is fixedly installed on the top of side rail 41. The output end of the third motor 42 passes through side rail 41 and is fixedly installed with a second lead screw 43. The outer surface of the second lead screw 43 is threaded with a sliding block 44. The sliding block 44 is slidably connected to the inside of side rail 41. A clamping arm 45 is fixedly installed on the inner side of the sliding block 44. An upper pressure plate 46 is fixedly installed at the bottom of the clamping arm 45. Ball bearings 47 are rotatably connected to the bottom of the upper pressure plate 46 in a linear arrangement at equal intervals. Ball bearings 47 are also rotatably connected to the inner top of the clamping seat 31 in a linear arrangement at equal intervals. During the application of this device, after the second motor 36 is started, its output end drives the side plate 31. The worm gear 34 on the inner side rotates, meshing with the worm wheels 32 arranged at equal intervals at the bottom of the clamping seat 31. The worm wheels 32 drive the top drive wheel 35 to rotate through a coupling. The ball bearings 47 on the inner side of the top of the clamping seat 31 contact the workpiece, cooperating with the drive wheel 35 to achieve the limiting and movement adjustment of the workpiece. The working principle of the positioning mechanism 4 is as follows: the third motor 42 starts, and the output end drives the second lead screw 43 inside the side rail 41 to rotate. The sliding block 44 on the outer surface of the second lead screw 43 slides along the side rail 41. The sliding block 44 drives the clamping arm 45 and the bottom upper pressure plate 46 to move down. The ball bearings 47 at the bottom of the upper pressure plate 46 press against the surface of the workpiece, completing the positioning and clamping of the workpiece. During use, in the limiting mechanism 3, the second motor 36 drives the worm gear 34 and worm wheel 32 to rotate the drive wheel 35. Combined with the top ball bearing 47 of the clamping seat 31, it can both drive the workpiece to move laterally to adjust the processing position and reduce friction to protect the workpiece, thus achieving flexible limiting of workpieces of different lengths. In the positioning mechanism 4, the third motor 42 drives the upper pressure plate 46 to move down through the second lead screw 43 and sliding block 44. The bottom ball bearing 47 of the upper pressure plate 46 contacts the workpiece, achieving stable clamping while avoiding scratching the workpiece. The side rail 41 ensures the sliding stability of the sliding block 44. The two work together to ensure accurate positioning of the workpiece during processing, improving the efficiency and stability of assembly positioning.

[0028] Operating principle and advantages: When using this device, the first step is installation and fixation. The support legs 5 at the four corners of the bottom of the frame 1 are connected to the machining center worktable through the mounting frame 6. The countersunk holes on both sides and the front and rear ends of the mounting frame 6 are used to insert fixing bolts, thereby stabilizing the entire device in the designated position. The outer edges of the frame 1 are designed with rounded corners to avoid personnel collisions and injuries during operation. Next, the workpiece is placed and initially adjusted. Large strip-shaped workpieces are placed on top of the clamps 31 of the two limiting mechanisms 3. The inner side of the top of the clamps 31 and the upper pressure plate The ball bearings 47 at the bottom of the 46 contact the workpiece surface, reducing frictional resistance when the workpiece is placed. The first motor 24 of the adjustment mechanism 2 is activated, and its output drives the first lead screw 22 inside the guide rail 21 to rotate. Because the threads at both ends of the first lead screw 22 rotate in opposite directions, the movable blocks 23 connected to its threads at both ends slide towards or away from each other along the U-shaped cavity of the guide rail 21. The U-shaped side of the movable block 23 matches the U-shaped cavity of the guide rail 21, ensuring sliding stability. The movable block 23 drives the limiting mechanism 3 connected at the top to move synchronously. The workpiece is positioned and clamped until the drive wheels 35 inside the two clamping seats 31 contact both sides of the workpiece, thus completing the workpiece's positioning. Then, the third motor 42 of the positioning mechanism 4 is activated. The output of the third motor 42 drives the second lead screw 43 inside the side rail 41 to rotate. The sliding block 44, threaded to the outer surface of the second lead screw 43, slides along the side rail 41. The sliding block 44 drives the inner clamping arm 45 to move downwards, causing the balls 47 at the bottom of the upper pressure plate 46 to press against the upper surface of the workpiece. Through the synchronous action of the positioning mechanisms 4 on both sides, the vertical movement of the workpiece is achieved. Positioning and clamping: When it is necessary to adjust the lateral machining position of the workpiece, the second motor 36 of the limit mechanism 3 is started. The output end of the second motor 36 drives the worm 34 on the inner side of the side plate 33 to rotate. The worm 34 meshes with the worm wheels 32 arranged at equal intervals at the bottom of the clamping seat 31. The worm wheels 32 drive the top drive wheel 35 to rotate through the coupling. The drive wheel 35 contacts the surface of the workpiece and generates friction, driving the workpiece to move laterally along the length of the clamping seat 31 until the workpiece to be machined reaches the designated area. The second motor 36 is then turned off to complete the position adjustment.

[0029] This device uses the first motor 24 of the adjusting mechanism 2 to drive the first lead screw 22, achieving automatic synchronous adjustment of the two limiting mechanisms 3. The positioning mechanism 4 uses the third motor 42 to drive the second lead screw 43, achieving automatic clamping of the upper pressure plate 46. This eliminates the need for manual bolt operation, significantly simplifying the operation process. Addressing the issue of frequent lateral position adjustments for long, narrow workpieces, the limiting mechanism 3 uses the second motor 36, worm gear 34, and worm wheel 32 to drive the drive wheel 35, directly driving the workpiece to move laterally along the clamping seat 31 without disassembling or repositioning it. This allows for processing and adjustment at any position on the workpiece's outer surface, solving the problem of inconvenient adjustment in the prior art. Furthermore, the first lead screw 22 of the adjusting mechanism 2 employs a reverse thread design at both ends, ensuring that the two movable blocks 23 move synchronously in opposite directions, resulting in uniform clamping force of the limiting mechanism 3 on the workpiece. The sliding block 44 of the positioning mechanism 4 slides along the side rail 41, ensuring stable pressure of the upper pressure plate 46 on the workpiece and avoiding... This design eliminates the positioning deviation caused by manual adjustment in the prior art and is suitable for large strip-shaped workpieces of different lengths. The side of the movable block 23 and the internal cavity of the guide rail 21 are both convex, which can limit the vertical offset or rotation of the movable block 23 during sliding, ensuring the linear accuracy of the adjustment mechanism 2 when driving the limit mechanism 3, and improving the overall positioning stability. The ball bearings 47 on the top inner side of the clamping seat 31 and the bottom of the upper pressure plate 46 convert the sliding friction between the workpiece and the positioning component into rolling friction during the placement and lateral movement of the workpiece, reducing frictional resistance and preventing scratches on the workpiece surface due to friction. At the same time, it reduces the power loss when the drive wheel 35 moves the workpiece. The support leg 5 supports the frame 1 and all the upper mechanisms, keeping the whole device at a certain height from the machining center worktable, which facilitates the cleaning and maintenance of the space below. The countersunk hole design of the mounting frame 6 allows the head of the fixing bolt to be embedded in the hole, preventing the bolt from protruding and affecting the movement of the workpiece or other components.

[0030] During the application of this device, the first motor 24, the second motor 36, and the third motor 42 drive the adjustment mechanism 2, the limiting mechanism 3, and the positioning mechanism 4 respectively, realizing the automatic adjustment and positioning of the workpiece, replacing manual operation, reducing labor intensity, and improving positioning efficiency. The adjustment mechanism 2 can adjust the distance between the two limiting mechanisms 3 through the first lead screw 22, which can adapt to large strip workpieces of different lengths. The drive wheel 35 of the limiting mechanism 3 can drive the workpiece to move laterally, meeting the processing requirements of any position on the outer surface of the workpiece. Its adaptability is better than that of the device in the background technology. The cooperation between the convex movable block 23 and the guide rail 21, the synchronous drive of the reverse threaded lead screw, and the low friction contact of the ball 47 all ensure high positional accuracy of the workpiece during positioning and adjustment, avoiding positioning deviation caused by manual adjustment or frictional resistance, and ensuring processing quality. The rounded arc design of the frame 1 and the stable fixation of the mounting frame 6 are also important.

[0031] During the application of this device, the diameter of the drive wheel 35 ranges from 50-80mm, and the length ranges from 100-150mm; the module of the worm gear 32 ranges from 2-4mm, and the number of teeth ranges from 20-30; the lead angle of the worm 34 ranges from 5°-10°, and the number of threads is 1; the diameter of the first lead screw 22 and the second lead screw 43 ranges from 20-30mm, and the pitch ranges from 4-8mm; the clearance between the movable block 23 and the guide rail 21 ranges from 0.02-0.05mm; and the diameter of the ball bearing 47 ranges from 8-12mm. The first motor 24, the second motor 36, and the third motor 42 are all servo motors, model 110ST-M06030, with a rated power of 1.8kW, a rated speed of 3000r / min, and a rated voltage of 380V. The controller is a PLC controller, model S7-1200, installed in the middle of the outer side of frame 1, and connected to the first motor 24, the second motor 36, and the third motor 42 respectively through wires. The power supply is a 380V three-phase AC power supply, and the controller controls the start, stop, and speed of each motor.

Claims

1. An assembly positioning auxiliary device for a large strip machining center, characterized in that: Includes a frame (1), an adjustment mechanism (2) is fixedly installed in the middle of the frame (1), a limit mechanism (3) is fixedly installed on both sides of the top of the adjustment mechanism (2), and a positioning mechanism (4) is fixedly installed on both sides of the outer side of the limit mechanism (3). The adjustment mechanism (2) includes a guide rail (21), which is fixedly installed in the middle of the inner side of the frame (1). A first lead screw (22) is rotatably connected inside the guide rail (21). The two ends of the first lead screw (22) have opposite thread directions. Both ends of the first lead screw (22) are threadedly connected to movable blocks (23). The top of the movable blocks (23) is connected to the bottom of the limiting mechanism (3). A first motor (24) is fixedly installed at one end of the guide rail (21). The output end of the first motor (24) is connected to the end of the first lead screw (22).

2. The assembly and positioning auxiliary device for a large strip machining center according to claim 1, characterized in that: The side of the movable block (23) is convex, the internal cavity of the guide rail (21) is also convex, and the outer corner of the frame (1) is rounded.

3. The assembly and positioning auxiliary device for a large strip machining center according to claim 1, characterized in that: Support legs (5) are fixedly installed at the four corners of the bottom of the frame (1), and mounting frames (6) are fixedly installed at the bottom of the support legs (5).

4. The assembly positioning auxiliary device for a large strip machining center according to claim 3, characterized in that: Mounting holes (7) are provided in the middle of both sides and the middle of both ends of the mounting frame (6). The mounting holes (7) are countersunk holes, and the outer corners of the mounting frame (6) are also rounded.

5. The assembly and positioning auxiliary device for a large strip machining center according to claim 1, characterized in that: The limiting mechanism (3) includes a clamp (31), which is fixedly installed on the top of the movable block (23). Worm gears (32) are rotatably connected to the bottom of the clamp (31) in a linear arrangement at equal intervals. Side plates (33) are fixedly installed at both ends of the clamp (31). Worms (34) are rotatably connected to the inner side of the side plates (33). The worm gears (34) and worm wheels (32) are mutually connected for transmission. Drive wheels (35) are rotatably connected to the top of the clamp (31) in a linear arrangement at equal intervals. The bottom of the drive wheels (35) is connected to the top of the worm wheels (32) through a coupling. A second motor (36) is fixedly installed on the outer side of one side plate (33). The output end of the second motor (36) is fixedly connected to the end of the worm gear (34).

6. The assembly positioning auxiliary device for a large strip machining center according to claim 5, characterized in that: The positioning mechanism (4) includes a side rail (41), which is fixedly installed at both ends of the outer side. A third motor (42) is fixedly installed on the top of the side rail (41). A second lead screw (43) is fixedly installed through the side rail (41) at the output end of the third motor (42). A sliding block (44) is threadedly connected to the outer surface of the second lead screw (43). The sliding block (44) is slidably connected to the inside of the side rail (41). A clamping arm (45) is fixedly installed on the inner side of the sliding block (44). An upper pressure plate (46) is fixedly installed at the bottom of the clamping arm (45).

7. The assembly positioning auxiliary device for a large strip machining center according to claim 6, characterized in that: The bottom of the upper pressure plate (46) is rotatably connected with balls (47) arranged linearly at equal intervals, and the top inner side of the clamp (31) is also rotatably connected with balls (47) arranged linearly at equal intervals.

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