A reversible positioning tool for machining mechanical parts

Abstract

The utility model relates to mechanical processing technical field, concretely discloses a kind of reversible positioning tool for mechanical parts processing including fixed base and clamping mechanism;Clamping mechanism includes connecting seat, the both sides of connecting seat bottom are respectively equipped with first clamping part and second clamping part, first clamping part is equipped with clamping cylinder, the piston rod of clamping cylinder is connected with second clamping part, to drive second clamping part and first clamping part realize clamping or release action;First clamping part and second clamping part between turnover mechanism, turnover mechanism includes first turnover plate and second turnover plate respectively arranged on the first clamping part and second clamping part;First turnover plate and second turnover plate are connected by telescopic sleeve set;The first turnover plate and second turnover plate can be rotated based on the first clamping part and second clamping part respectively;Completely dispense with the redundant process of disassembly, turnover, reinstallation clamping, greatly shorten processing cycle, improve efficiency and reduce time and artificial cost.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a flip-up positioning fixture for machining mechanical parts. Background Technology

[0002] In the field of mechanical parts machining, positioning fixtures are key equipment for ensuring machining accuracy and improving machining efficiency. Their core function is to stably clamp and position the parts during the machining process, ensuring that the cutting tool can complete cutting, drilling, grinding, and other machining operations according to a preset trajectory. However, existing mechanical parts machining positioning fixtures are mostly limited by structural design and adopt fixed clamping and support structures. That is, the relative positions of the clamping and support components of the fixture are fixed, making it impossible to adjust the angle or flip the parts.

[0003] Specifically, when multiple surfaces of a part (such as the upper and lower surfaces and circumferential sides) need to be machined, the existing fixtures cannot rotate the part. Operators must first complete the machining of one surface, then stop the machining process, manually disassemble the fixture, rotate the part so the surface to be machined is facing upwards, readjust the part's position, and re-clamp it with the fixture. Only after confirming accurate positioning can the equipment be restarted for further machining. This process of machining, disassembling, rotating, re-clamping, and re-machining significantly extends the overall machining cycle, especially in batch processing scenarios. Repeated disassembly and reassembly operations drastically reduce machining efficiency, increasing time and labor costs for the company. Furthermore, each time the part is re-clamped, the positioning reference is difficult to perfectly match the initial clamping, easily resulting in millimeter-level or even micrometer-level positioning deviations. These repeated positioning errors are directly transmitted to the machining process, making it difficult to guarantee the machining accuracy of each surface, leading to dimensional errors, surface positional discrepancies, and in severe cases, even scrapping the part and reducing the product qualification rate.

[0004] Furthermore, for some irregularly shaped or large mechanical parts, manual disassembly and reclamping are more difficult, requiring multiple operators to work together. Improper handling can also lead to damage to the parts, further increasing the risks and costs during processing. Therefore, existing fixed-structure positioning fixtures are no longer sufficient to meet the efficiency, precision, and safety requirements of modern machining. There is an urgent need for a positioning fixture that allows for flexible part flipping and multi-faceted machining without repeated disassembly and reassembly, thus addressing these technical challenges. Utility Model Content

[0005] In view of this, the present invention provides a flip-up positioning fixture for machining mechanical parts, which solves the technical problem that the fixtures in the prior art are mostly fixed structures, and the parts need to be disassembled and re-clamped after one side is machined before the other side can be machined, resulting in a long machining time and easy errors due to repeated positioning.

[0006] This utility model embodiment provides a flip-up positioning fixture for machining mechanical parts, including: A fixed base, and a clamping mechanism disposed on the fixed base; The clamping mechanism includes a connecting seat connected to a fixed base. A first clamping part and a second clamping part are respectively provided on both sides of the bottom of the connecting seat. A clamping cylinder is provided on the first clamping part. The piston rod of the clamping cylinder is connected to the second clamping part to drive the second clamping part and the first clamping part to perform clamping or releasing actions. A flipping mechanism between the first clamping part and the second clamping part, the flipping mechanism including a first flipping plate and a second flipping plate respectively disposed on the first clamping part and the second clamping part; The first flip plate and the second flip plate are connected by a telescopic kit; the first flip plate and the second flip plate can rotate based on the first clamping part and the second clamping part, respectively.

[0007] Preferably, the fixed base is further provided with a lifting mechanism, and the clamping mechanism is mounted on the lifting mechanism via a connecting seat, and can move vertically based on the lifting mechanism; The lifting mechanism includes a mounting plate and a slide block disposed on the mounting plate. A pair of sliders are fixedly disposed on both sides of the slide block, and each pair of sliders is provided with a sliding guide rail.

[0008] Preferably, the lifting mechanism further includes a threaded cylinder disposed on the slide block and a screw disposed inside the threaded cylinder. The screw is driven by a drive motor mounted on a slide table covering the outside of the slide block, and the guide rail is fixed inside the slide table. The slide is fixedly connected to the connecting seat so that the clamping mechanism can move up and down with the slide.

[0009] Preferably, the bottom of the connecting seat is provided with a first limiting member and a second limiting member at both ends of the first clamping part and the second clamping part, respectively, and the connecting seat is further provided with a third limiting member and a fourth limiting member between the first clamping part and the second clamping part.

[0010] Preferably, the first clamping part and the second clamping part are respectively provided with the rotating base of the first flip plate and the second flip plate; The first flip plate and the second flip plate are rotatably connected to the first clamping part and the second clamping part through the rotating base.

[0011] Preferably, the first clamping part and / or the second clamping part are provided with a flipping motor for driving the rotary table, and the flipping motor is connected to the rotary table through a coupling.

[0012] Preferably, the inner sides of the first and second flip plates are provided with a plurality of positioning pins.

[0013] Preferably, an auxiliary lifting cylinder is provided on one side of the fixed base, and the piston rod of the auxiliary lifting cylinder is fixedly connected to the top of the connecting seat.

[0014] Preferably, one side of the fixed base is also provided with an anti-fall component; The anti-fall component includes a stop rod disposed on one side of the slide table, and the stop rod is provided with a plurality of stop teeth; The anti-drop component also includes an anti-drop gas lock disposed on a fixed base, and a locking block that can be ejected based on the anti-drop gas lock and engage with the stop tooth.

[0015] The flip-type positioning fixture for machining mechanical parts provided by this utility model has the following beneficial effects: The flip-type positioning fixture for machining mechanical parts disclosed in this application addresses the technical pain point of existing fixed-structure fixtures requiring repeated disassembly and reassembly during multi-face machining of parts. By combining a flipping mechanism consisting of a first flipping plate, a second flipping plate, a rotary table, and a flipping motor with a flexible adaptable structure of a telescopic kit, it can produce several significant benefits: there is no need to disassemble and reassemble after machining one surface of the part; the flipping plate can be synchronously flipped by simply driving the rotary table with the flipping motor to quickly switch the surface to be machined, completely eliminating the redundant process of disassembly, flipping, and re-clamping, greatly shortening the machining cycle, improving efficiency, and reducing time and labor costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0017] Figure 1 This is a schematic diagram of a flip-up positioning fixture used for machining mechanical parts. Figure 2 This is a schematic diagram of a flip-up positioning fixture used for machining mechanical parts from another angle. Figure 3This is a schematic diagram of the internal structure of a flip-up positioning fixture used for machining mechanical parts. Parts and component numbers in the diagram: 100-Fixed base, 110-Lifting mechanism, 111-Mounting plate, 112-Slide block, 113-Slider, 114-Guide rail, 115-Threaded cylinder, 116-Screw, 117-Drive motor, 118-Slide table, 119-Auxiliary lifting cylinder; 210-Connecting seat, 211-First limiting member, 212-Second limiting member, 213-Third limiting member, 214-Fourth limiting member, 220-First clamping part, 230-Second clamping part, 241-Rotating seat, 242-Clamping cylinder; 310-First flip plate, 320-Second flip plate, 330-Telescopic kit, 341-Flipping motor, 342-Positioning pin; 410-Stop rod, 411-Stop tooth, 420-Anti-air lock, 421-Locking block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention. Example

[0019] Please see Figures 1-3This utility model provides a flip-up positioning fixture for machining mechanical parts. In the field of mechanical parts machining, positioning fixtures are key equipment to ensure machining accuracy and efficiency. However, existing fixtures mostly adopt a fixed structure design, and the relative positions of their clamping and supporting components cannot be adjusted, making it difficult to meet the needs of multi-faceted machining of parts. When multiple surfaces of a part, such as the upper and lower end faces and circumferential sides, need to be machined, the operator must first complete the machining of one surface, then stop the machine and manually disassemble the fixture to fix the part, flip the part so that the surface to be machined is facing up, readjust its position, and clamp it again. Only after confirming that the positioning is correct can machining continue. This repetitive disassembly and assembly process not only significantly delays machining but also... The extended overall processing cycle, especially in mass production, significantly reduces processing efficiency and increases labor and time costs. Furthermore, the part positioning reference is difficult to be completely consistent with the first time when re-clamping, which easily leads to repeated positioning errors. This results in the dimensional accuracy and positional accuracy of the parts' surfaces not meeting design requirements, and may even cause parts to be scrapped. In addition, for parts with irregular shapes or large sizes, manual disassembly and flipping operations are more difficult, requiring multiple people to work together. Improper operation can easily cause parts to be bumped and damaged, further increasing processing risks and losses. Existing fixed tooling can no longer meet the efficiency, accuracy and safety requirements of modern machining, and targeted improvements are urgently needed to solve the above problems.

[0020] Therefore, in this embodiment, a flip-up positioning fixture for machining mechanical parts is provided. The flip-up positioning fixture includes a fixed base 100 and a clamping mechanism disposed on the fixed base 100. The clamping mechanism includes a connecting seat 210 connected to the fixed base 100. A first clamping part 220 and a second clamping part 230 are respectively provided on both sides of the bottom of the connecting seat 210. A clamping cylinder 242 is provided on the first clamping part 220. The piston rod of the clamping cylinder 242 is connected to the second clamping part 230 to drive the second clamping part 230. The clamping part 230 and the first clamping part 220 perform clamping or releasing actions; there is a flipping mechanism between the first clamping part 220 and the second clamping part 230, the flipping mechanism includes a first flipping plate 310 and a second flipping plate 320 respectively disposed on the first clamping part 220 and the second clamping part 230; the first flipping plate 310 and the second flipping plate 320 are connected by a telescopic kit 330; the first flipping plate 310 and the second flipping plate 320 can rotate based on the first clamping part 220 and the second clamping part 230 respectively.

[0021] In this embodiment, the use of the flip-type positioning fixture for machining mechanical parts requires the coordinated structure of the fixed base 100, the clamping mechanism, and the flipping mechanism. The specific process is as follows: First, the operator controls the clamping cylinder 242 on the first clamping part 220 according to the size of the part to be processed. This causes the piston rod of the clamping cylinder 242 to move the second clamping part 230 away from the first clamping part 220, increasing the distance between the two parts. The part to be processed is then placed between the first flip plate 310 and the second flip plate 320. Next, the clamping cylinder 242 is controlled in the opposite direction, causing the piston rod to push the second clamping part 230 closer to the first clamping part 220 until the first flip plate 310 and the second flip plate 320 are in contact with the surface of the part, completing the clamping and fixing of the part. During this process, if there are slight differences in the size of the part, the telescopic sleeve 330 between the first flip plate 310 and the second flip plate 320 can adapt by extending or retracting to ensure stable clamping of the part. After clamping is completed, the processing equipment can be started. The surface of the part facing the machining station is machined. After the surface is machined, without disassembling the part, the first flip plate 310 and the second flip plate 320 are directly driven to rotate around the first clamping part 220 and the second clamping part 230 respectively, so that the part is flipped synchronously with the flip plate until the unmachined surface is switched to the position facing the machining station. At this time, the telescopic kit 330 can maintain the clamping force on the part with the rotation of the flip plate to prevent the part from shifting during the flipping process. After the part is flipped to the target angle, the flipping is stopped and the state is maintained, and the new machining surface can continue to be machined. After all surfaces of the part are machined, the clamping cylinder 242 is controlled again to drive the second clamping part 230 away from the first clamping part 220 to release the clamping of the part. Finally, the machined part is taken out from between the first flip plate 310 and the second flip plate 320, completing a single machining process.

[0022] Furthermore, the fixed base 100 is also provided with a lifting mechanism 110. The clamping mechanism is set on the lifting mechanism 110 through the connecting seat 210 and can move vertically based on the lifting mechanism 110. The lifting mechanism 110 includes a mounting plate 111 and a slide block 112 set on the mounting plate 111. A pair of sliders 113 are fixed on both sides of the slide block 112, and a sliding guide rail 114 is provided on each pair of sliders 113.

[0023] The lifting mechanism 110 further includes a threaded cylinder 115 disposed on the slide block 112 and a screw 116 disposed inside the threaded cylinder 115. The screw 116 is driven by a drive motor 117 disposed on a slide table 118 covering the outside of the slide block 112. The guide rail 114 is fixed inside the slide table 118. The slide table 118 is fixedly connected to the connecting seat 210 so that the clamping mechanism can move up and down with the slide table 118.

[0024] Furthermore, the operator activates the drive motor 117 mounted on the slide table 118 outside the slide block 112, based on the worktable height of the processing equipment, the tool stroke, or the size requirements of the part to be processed. After the drive motor 117 starts running, it drives the screw 116 to rotate. Since the screw 116 is threadedly engaged with the threaded cylinder 115 mounted on the slide block 112, the rotation of the screw 116 is converted into linear movement of the slide block 112 along the axis of the screw 116. Simultaneously, the sliders 113 fixed on both sides of the slide block 112 slide synchronously along the guide rails 114 fixed inside the slide table 118, which act as guides and limits, preventing the slide block 112 from shifting during movement. Because the slide table 118 is fixedly connected to the connecting seat 210 of the clamping mechanism, the movement of the slide block 112 causes the slide table 118, the connecting seat 210, and the entire clamping mechanism to rise and fall synchronously until the clamping mechanism moves the part to be processed to a height suitable for the processing equipment. Then, the drive motor 117 is turned off, completing the height adjustment.

[0025] If the machining position of the part needs to be adjusted during the machining process, the drive motor 117 can be restarted. By controlling the forward and reverse rotation of the motor and adjusting the speed of the screw 116, the clamping mechanism can drive the part to slowly rise and fall, accurately adjust it to the target machining height, and ensure machining accuracy. After the adjustment is completed, the motor can be turned off to maintain a stable height.

[0026] After all surfaces of the part are machined, the clamping mechanism is used to release the part from the clamping mechanism. Then, the drive motor 117 is started to control the screw 116 to reverse, so that the slide 112 drives the slide table 118, the connecting seat 210 and the clamping mechanism to descend to the initial low position. Finally, the motor is turned off, and the operator can easily take out the machined part.

[0027] Specifically, different processing equipment has different worktable heights and tool strokes. The lifting mechanism 110 can adjust the height of the clamping mechanism to make the workpiece to be processed accurately match the processing station of different equipment such as lathes, milling machines, and drilling machines, without the need to customize special tooling for different equipment, thus greatly expanding the applicability of tooling.

[0028] During the processing, the height of the part is precisely adjusted by the lifting mechanism 110, which can ensure that the part to be processed is completely aligned with the tool processing path. This is especially suitable for processing parts with different depths and different positional features, avoiding dimensional deviations due to height discrepancies and improving the processing accuracy of the parts.

[0029] Furthermore, the clamping mechanism can be adjusted to a lower height before processing to facilitate part clamping, and then lowered to a lower position after processing for easy part removal. This eliminates the need for operators to tiptoe or use tools for high-altitude operations, reducing the risk of operational errors and preventing damage caused by parts falling when being removed from a high position, thus improving operational safety and convenience. During the lifting process, the sliders 113 on both sides of the slide block 112 slide along the guide rail 114, which can limit the movement trajectory of the slide block 112 and prevent it from shifting left or right or swaying during lifting. The threaded engagement between the screw 116 and the threaded cylinder 115 ensures smooth transmission, guaranteeing that the clamping mechanism drives the part to lift and lower at a uniform speed, preventing the part from shifting due to unstable lifting and further ensuring processing accuracy and part safety.

[0030] Furthermore, the bottom ends of the connecting seat 210 are respectively provided with a first limiting member 211 and a second limiting member 212 of the first clamping part 220 and the second clamping part 230. The connecting seat 210 is also provided with a third limiting member 213 and a fourth limiting member 214 of the first clamping part 220 and the second clamping part 230 between the first clamping part 220 and the second clamping part 230.

[0031] Specifically, the first limiting member 211 and the second limiting member 212 are respectively disposed at both ends of the bottom of the connecting seat 210, correspondingly limiting the maximum distance between the first clamping part 220 and the second clamping part 230. When the clamping cylinder 242 drives the second clamping part 230 to move away from the first clamping part 220, if the cylinder stroke is too large or an operational error causes the second clamping part 230 to move excessively, the second limiting member 212 will directly abut against the second clamping part 230 to prevent it from continuing to move. Similarly, if the first clamping part 220 shows a tendency to shift due to assembly gaps or external forces, the first limiting member 211 will block it. This design can prevent the clamping part from moving beyond the structural bearing capacity of the connecting seat 210 due to excessive movement, prevent the connection structure between the clamping part and the connecting seat 210 from breaking due to overload, and at the same time prevent the piston rod of the clamping cylinder 242 from extending excessively, which could damage the seals or shorten the cylinder life, thus ensuring the stability and service life of the overall tooling structure.

[0032] The third limiting member 213 and the fourth limiting member 214 are disposed between the first clamping part 220 and the second clamping part 230 at the bottom of the connecting seat 210, correspondingly limiting the minimum proximity boundary between the two. When the clamping cylinder 242 drives the second clamping part 230 to approach the first clamping part 220 to clamp the part, if the cylinder thrust is too large or the part size is smaller than expected, the third limiting member 213 and the fourth limiting member 214 will contact the part before the first clamping part 220 and the second clamping part 230, forming a rigid barrier to limit the two from continuing to approach. This design can precisely control the minimum distance between the first and second clamping parts 220 and 230, avoiding indentations and deformation on the surface of the part due to excessive clamping force, while preventing wear caused by direct collision of the flip plates of the first and second clamping parts 220 and 230, ensuring the appearance and structural integrity of the part before processing, and reducing the risk of part scrap.

[0033] Furthermore, the first clamping part 220 and the second clamping part 230 are respectively provided with a rotating base 241 for the first flip plate 310 and the second flip plate 320; the first flip plate 310 and the second flip plate 320 are rotatably connected to the first clamping part 220 and the second clamping part 230 through the rotating base 241.

[0034] Furthermore, the first clamping part 220 and / or the second clamping part 230 are provided with a flipping motor 341 for driving the rotary table 241, and the flipping motor 341 is connected to the rotary table 241 through a coupling.

[0035] Furthermore, the inner sides of the first flip plate 310 and the second flip plate 320 are provided with a plurality of positioning pins 342.

[0036] Specifically, when a part is clamped between the first clamping part 220 and the second clamping part 230, the positioning pins 342 can be inserted into pre-set positioning holes on the part. Through the precise engagement of the positioning pins 342 and the positioning holes, the part can be accurately positioned, ensuring that the part's position is accurate and stable during clamping and will not shift due to clamping action or external forces during subsequent processing. This effectively improves the precision and quality of part processing and reduces processing errors and defective products caused by part position deviations.

[0037] Furthermore, an auxiliary lifting cylinder 119 is provided on one side of the fixed base 100, and the piston rod of the auxiliary lifting cylinder 119 is fixedly connected to the top of the connecting seat 210.

[0038] Specifically, when the clamping mechanism holds large, heavy mechanical parts, the total weight of the entire clamping mechanism and the parts will be entirely applied to the connecting structure of the screw 116, drive motor 117, and slide 112 of the main lifting mechanism 110. Long-term high-load operation can easily lead to thread wear of the screw 116 and fatigue deformation of the motor output shaft. However, the piston rod of the auxiliary lifting cylinder 119 is fixedly connected to the top of the connecting seat 210, which can provide upward support during the lifting process, directly sharing part of the load weight. This allows the screw 116 and drive motor 117 of the main lifting mechanism 110 to only bear the remaining load, significantly reducing the stress on the core components of the main lifting mechanism 110, reducing wear and fatigue, extending the service life of key components such as the drive motor 117 and screw 116, and reducing the maintenance cost and failure probability of the tooling. The main lifting mechanism 110 relies solely on the transmission between the screw 116 and the threaded cylinder 115. If the weight distribution of the parts is uneven or there are slight impurities or jamming on the guide rail 114, the slide table 118 may experience slight shaking or jamming during the lifting process, affecting the height adjustment accuracy of the parts. The auxiliary lifting cylinder 119 can provide a uniform upward thrust through stable air pressure output, forming a synergy with the driving force of the main lifting mechanism 110. On the one hand, the thrust of the cylinder can balance the eccentric force caused by uneven weight distribution of the parts, reducing the shaking of the slide table 118 caused by force imbalance. On the other hand, when the main lifting mechanism 110 shows a brief tendency to jam, the continuous thrust of the cylinder can assist the slide table 118 to move smoothly, avoiding part positioning deviation due to jamming, ensuring a smooth and accurate lifting process, and further guaranteeing the height matching accuracy of the parts before processing. If the drive motor 117 of the main lifting mechanism 110 malfunctions, such as a power outage, motor burnout, or screw 116 jamming, the clamping mechanism and parts will be unable to move, directly causing the processing flow to stop. At this time, the auxiliary lifting cylinder 119 can be used as an emergency lifting device: the cylinder is activated by the external pneumatic control system, and the extension and retraction of the cylinder piston rod drives the connecting seat 210 and the clamping mechanism to move up and down. This can lower the processed parts to a lower position for removal, avoiding the safety hazards caused by the parts remaining in a high position for a long time, and can also temporarily adjust the parts to be processed to a suitable height, ensuring a short-term continuation of the processing flow, buying time for the maintenance of the main lifting mechanism 110, and reducing production losses caused by equipment failure.

[0039] Furthermore, an anti-drop component is provided on one side of the fixed base 100; the anti-drop component includes a stop rod 410 disposed on one side of the slide table 118, and the stop rod 410 is provided with a plurality of stop teeth 411; the anti-drop component also includes an anti-drop gas lock 420 disposed on the fixed base 100, and a locking block 421 that can be popped out based on the anti-drop gas lock 420 and engaged with the stop teeth 411.

[0040] Specifically, when the lifting mechanism 110 is not activated and the slide 118 is stationary, or when the drive motor 117 drives the slide 118 to move smoothly up and down during normal operation, the anti-drop air lock 420 is in an untriggered state, and the locking block 421 inside it remains in a retracted state, not in contact with the stop tooth 411 on the stop rod 410, thus not affecting the movement of the slide 118 in the vertical direction, ensuring that the lifting mechanism 110 can freely adjust its height. If the lifting mechanism 110 malfunctions, such as a sudden power failure of the drive motor 117, a failure of the transmission between the screw 116 and the threaded cylinder 115, or jamming of the slider 113 and the guide rail 114 causing the slide table 118 to tend to fall, the anti-drop airlock 420 will be triggered immediately. This can be achieved by detecting abnormal movement signals of the slide table 118 through a pressure sensor or displacement sensor, automatically activating the airlock, and driving the locking block 421 to pop out quickly and precisely engage in the gap of the stop teeth 411 of the stop rod 410 set on one side of the slide table 118. Since the stop rod 410 is fixedly connected to the slide table 118 and the anti-drop airlock 420 is fixedly connected to the fixed base 100, the engagement of the locking block 421 and the stop teeth 411 will form a rigid support, directly restricting the downward movement of the slide table 118 and firmly locking the slide table 118 in the current position.

[0041] After the staff has investigated and repaired the fault of the lifting mechanism 110, the anti-drop air lock 420 is depressurized by controlling it, so that the locking block 421 retracts and resets from the gap of the stop tooth 411, thereby releasing the locking restriction on the slide table 118. At this time, the lifting mechanism 110 can resume normal lifting operation, and the anti-drop component returns to the standby state, waiting for the next fault to be triggered.

[0042] When the lifting mechanism 110 malfunctions and causes the slide table 118 to lose power support, the slide table 118 and the clamping mechanism and the parts to be processed above it will tend to fall due to gravity. The quick engagement of the locking block 421 and the stop tooth 411 can instantly stop the fall, preventing the slide table 118 from hitting the fixed base 100 and causing damage to the lifting mechanism 110. At the same time, it prevents the parts from being deformed or scrapped due to falling and impact, and even avoids safety accidents caused by equipment damage.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A flip-up positioning fixture for machining mechanical parts, characterized in that, include: A fixed base (100) and a clamping mechanism disposed on the fixed base (100); The clamping mechanism includes a connecting seat (210) connected to a fixed base (100). The bottom sides of the connecting seat (210) are respectively provided with a first clamping part (220) and a second clamping part (230). The first clamping part (220) is provided with a clamping cylinder (242). The piston rod of the clamping cylinder (242) is connected to the second clamping part (230) to drive the second clamping part (230) and the first clamping part (220) to perform clamping or releasing actions. A flipping mechanism is provided between the first clamping part (220) and the second clamping part (230). The flipping mechanism includes a first flipping plate (310) and a second flipping plate (320) respectively disposed on the first clamping part (220) and the second clamping part (230). The first flip plate (310) and the second flip plate (320) are connected by a telescopic kit (330); the first flip plate (310) and the second flip plate (320) can rotate based on the first clamping part (220) and the second clamping part (230), respectively.

2. The flip-up positioning fixture for machining mechanical parts according to claim 1, characterized in that, The fixed base (100) is also provided with a lifting mechanism (110). The clamping mechanism is set on the lifting mechanism (110) through a connecting seat (210) and can move vertically based on the lifting mechanism (110). The lifting mechanism (110) includes a mounting plate (111) and a slide (112) disposed on the mounting plate (111). A pair of sliders (113) are fixedly disposed on both sides of the slide (112), and a sliding guide rail (114) is provided on each of the pair of sliders (113).

3. The flip-up positioning fixture for machining mechanical parts according to claim 2, characterized in that, The lifting mechanism (110) further includes a threaded cylinder (115) disposed on the slide (112) and a screw (116) disposed inside the threaded cylinder (115). The screw (116) is driven by a drive motor (117) disposed on a slide table (118) covering the outside of the slide (112). The guide rail (114) is fixed inside the slide table (118). The slide (118) is fixedly connected to the connecting seat (210) so that the clamping mechanism can move up and down following the slide (118).

4. The flip-up positioning fixture for machining mechanical parts according to claim 1, characterized in that, The bottom ends of the connecting seat (210) are respectively provided with a first limiting member (211) and a second limiting member (212) for limiting the first clamping part (220) and the second clamping part (230). The connecting seat (210) is also provided with a third limiting member (213) and a fourth limiting member (214) for limiting the first clamping part (220) and the second clamping part (230) between the first clamping part (220) and the second clamping part (230).

5. The flip-up positioning fixture for machining mechanical parts according to claim 1, characterized in that, The first clamping part (220) and the second clamping part (230) are respectively provided with a rotating base (241) for mounting the first flip plate (310) and the second flip plate (320). The first flip plate (310) and the second flip plate (320) are rotatably connected to the first clamping part (220) and the second clamping part (230) via the rotating base (241).

6. The flip-up positioning fixture for machining mechanical parts according to claim 5, characterized in that, The first clamping part (220) and / or the second clamping part (230) are provided with a flip motor (341) for driving the rotary table (241), and the flip motor (341) is connected to the rotary table (241) via a coupling.

7. The flip-up positioning fixture for machining mechanical parts according to claim 1, characterized in that, The inner sides of the first flip plate (310) and the second flip plate (320) are provided with a plurality of positioning pins (342).

8. The flip-up positioning fixture for machining mechanical parts according to claim 1, characterized in that, An auxiliary lifting cylinder (119) is also provided on one side of the fixed base (100), and the piston rod of the auxiliary lifting cylinder (119) is fixedly connected to the top of the connecting seat (210).

9. A flip-up positioning fixture for machining mechanical parts according to claim 3, characterized in that, One side of the fixed base (100) is also provided with an anti-fall component; The anti-fall component includes a stop rod (410) disposed on one side of the slide (118), and the stop rod (410) is provided with a plurality of stop teeth (411). The anti-drop component also includes an anti-drop gas lock (420) disposed on the fixed base (100), and a locking block (421) that can be ejected based on the anti-drop gas lock (420) and engaged with the stop tooth (411).

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