Graphite special-shaped part positioning machining clamp

Abstract

The utility model discloses a special-shaped graphite piece positioning machining clamp belongs to special-shaped graphite piece processing technical field, and it aims at solving the problem of the prior art in the multiple angle positioning of workpiece can not be realized, and single clamping can only complete single side or local processing, and the turnover operation can be carried out only by repeatedly disassembling and re-clamping, thereby leading to the substantial reduction of production efficiency, on the other hand, the cumulative positioning error is easy to produce in multiple clamping, and the coaxiality and symmetry precision of hole position, channel and other characteristics are influenced in production and processing. Including fixed base, the front end of fixed base is equipped with the assembly station, and the middle part and one side of assembly station are equipped with auxiliary clamping mechanism, the auxiliary clamping mechanism includes a pair of screw rod slide cover, and the inner end of two screw rod slide cover is equipped with the continuous plate, and a pair of the middle part of continuous plate is movably installed with the rotating frame, and the inner end of two rotating frames is equipped with the compression spring frame, and the end of compression spring frame is connected with rubber clamping block.

Description

Technical Field

[0001] This utility model belongs to the field of irregular graphite part processing technology, specifically relating to a positioning and processing fixture for irregular graphite parts. Background Technology

[0002] Graphite is an allotrope of carbon, a grayish-black, opaque solid. It is chemically stable, corrosion-resistant, and does not readily react with acids, alkalis, or other chemicals. Natural graphite comes from graphite deposits, but artificial graphite can also be produced from raw materials such as petroleum coke and pitch coke through a series of processing steps. A major use of graphite parts (products) is in the production of refractory materials, including refractory bricks, crucibles, continuous casting powder, mold cores, molds, detergents, and high-temperature resistant materials. Positioning and machining fixtures are required for fixing graphite products during production.

[0003] Current positioning and machining fixtures cannot achieve multi-angle positioning of workpieces. A single clamping can only complete single-sided or partial processing. Repeated disassembly and re-clamping are required to perform flipping operations, which leads to a significant reduction in production efficiency. On the other hand, multiple clamping can easily generate cumulative positioning errors, which will affect the coaxiality and symmetry accuracy of features such as holes and channels during production and processing. Utility Model Content

[0004] (1) Technical problems to be solved To address the shortcomings of existing technologies, the purpose of this utility model is to provide a positioning and processing fixture for irregularly shaped graphite parts. This fixture aims to solve the problems in existing technologies where multi-angle positioning of the workpiece is not possible, and single clamping can only complete single-sided or partial processing. Repeated disassembly and re-clamping are required to perform flipping operations, resulting in a significant reduction in production efficiency. On the other hand, multiple clamping can easily generate cumulative positioning errors, which can affect the coaxiality and symmetry accuracy of features such as holes and channels during production and processing.

[0005] (2) Technical solution To solve the above-mentioned technical problems, this utility model provides a positioning and processing fixture for irregularly shaped graphite parts, including a fixed base. An assembly platform is fixedly provided at the front end of the fixed base, and an auxiliary clamping mechanism is installed in the middle and on one side of the assembly platform. The auxiliary clamping mechanism includes a pair of lead screw sleeves, and a connecting plate is fixedly provided at the inner end of the two lead screw sleeves. A rotating frame is movably installed in the middle of a section of the pair of connecting plates, and a compression spring frame is installed in the inner end of the two rotating frames. A rubber clamping block is connected to the end of the compression spring frame. A flipping mechanism is jointly installed at the end of one of the rotating frames and the back end of the connecting plate. The flipping mechanism includes a fixed block, and the fixed block is fixed on both sides of the back end of one of the connecting plates. A flipping assembly is assembled in the middle of the two fixed blocks and around the periphery of one of the rotating frames. The flipping assembly includes a rotating rod, and a portable locking component is installed at one end of the rotating rod.

[0006] Furthermore, the flipping assembly includes a rotating rod, which is movably mounted in the middle of two fixed blocks. A worm gear is fixed around a section of the rotating rod, and a worm wheel is fixed around a section of one of the rotating frames.

[0007] Furthermore, the worm gear and the worm are connected by a meshing transmission.

[0008] Furthermore, the portable locking assembly includes a guide block, which is disposed around a section of the rotating rod. A guide hand sleeve is mounted around the periphery of the guide block, and a limiting hole is provided around the center of the guide hand sleeve. A limiting rod is fixed to the front end of one of the connecting plates.

[0009] Furthermore, the size of the limiting holes distributed around the center of the guide handle sleeve matches the diameter of its limiting rod.

[0010] Furthermore, the auxiliary clamping mechanism includes preset slots, which are respectively located on both sides of the front end of the assembly table. One of the preset slots is equipped with a positive and negative lead screw in the middle, and lead screw sleeves are screwed on both sides of the middle of the positive and negative lead screw. The other preset slot is fixed with a guide rod in the middle. One end of the positive and negative lead screw is fixed with a hand crank, and a slot is opened in the middle of one side of the hand crank. A threaded rod is inserted into the middle of the slot. A screw groove is opened on one side of the assembly table.

[0011] Furthermore, the guide rod forms a movable guide connection with its two connecting plates.

[0012] Furthermore, the hand crank is fixedly connected to the screw groove and the assembly table by a threaded insert rod.

[0013] (3) Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: When a workpiece needs to be flipped during processing, the operator simply needs to manually guide the hand sleeve. Under the axial limitation of the guide block on one side of the rotating rod, the rotating rod and the fixed worm gear can be rotated. The worm gear can then drive the worm wheel meshing on one side. Since a rotating shaft is fixed in the middle of the worm wheel, the rotating frame in the middle of this part of the connecting plate can be actively rotated. Since the rotating frame in the middle of the other connecting plate is movable, the above-mentioned active rotation can indirectly carry the workpiece held by a pair of rubber clamping blocks to flip it. After flipping to a suitable angle, the operator can press the hand sleeve under the radial guidance of the guide block. The corresponding limiting holes on the periphery of the middle of the hand sleeve can then be aligned and fitted around the periphery of the limiting rod, thus fixing the flipping angle. At this point, the operator can achieve the purpose of processing different sides of the workpiece without re-clamping and without error.

[0014] When clamping and positioning irregularly shaped graphite parts, the operator can first place the graphite part to be positioned stably on the top of the lifting platform on the fixed base table. The lifting platform structure can be driven by an electric cylinder as in the prior art. Then, the operator manually cranks the hand crank to rotate the forward and reverse lead screws. As a result, a pair of lead screw sleeves interacting with the lead screws can move relative to each other with their respective fixed connecting plates and guide rods. This continues until the rubber clamping blocks set at the inner ends of the relative connecting plates clamp the graphite parts on both sides. Since a compression spring frame is installed at the connection between the rubber clamping blocks and the rotating frame, the elastic deformation of the compression spring and the self-guided frame in the clamping state can adaptively fill the small unevenness or dimensional tolerance of the workpiece surface. Thus, the elastic force pushes the clamping frame to stick to the workpiece, avoiding the shaking caused by the gap due to rigid clamping. After stable clamping, the operator can use the threaded rod pre-inserted into the preset hole of the hand crank to thread it to the alignment screw groove on one side of the assembly table, thereby avoiding affecting the clamping stability during the processing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle; Figure 3 This is a top view of the tilting mechanism. Figure 4This is a partial structural diagram of the flipping mechanism.

[0017] The markings in the attached diagram are as follows: 1. Fixed base; 2. Assembly table; 3. Auxiliary clamping mechanism; 31. Preset groove; 32. Positive and negative lead screws; 33. Lead screw sleeve; 34. Guide rod; 35. Hand crank; 36. Slot; 37. Threaded insertion rod; 38. Threaded groove; 4. Connecting plate; 5. Rotating frame; 6. Compression spring frame; 7. Rubber clamping block; 8. Flipping mechanism; 81. Fixed block; 82. Flipping assembly; 821. Rotating rod; 822. Worm gear; 823. Worm; 83. Portable locking assembly; 831. Guide block; 832. Guide hand sleeve; 833. Limiting hole; 834. Limiting rod. Detailed Implementation

[0018] 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.

[0019] This specific embodiment is a positioning and machining fixture for irregularly shaped graphite parts, and its structural schematic diagram is shown below. Figures 1 to 4As shown, the device includes a fixed base 1, an assembly platform 2 fixedly mounted at the front end of the fixed base 1, and an auxiliary clamping mechanism 3 installed in the middle and on one side of the assembly platform 2. The auxiliary clamping mechanism 3 includes a pair of lead screw sleeves 33, and a connecting plate 4 fixedly mounted on the inner end of the two lead screw sleeves 33. A rotating frame 5 is movably mounted on the middle of one section of the pair of connecting plates 4, and a compression spring frame 6 is mounted on the inner end of the two rotating frames 5. A rubber clamping block 7 is connected to the end of the compression spring frame 6. A flipping mechanism 8 is jointly mounted on the end of one of the rotating frames 5 and the back end of the connecting plate 4. The assembly table 2 includes pre-set slots 31, which are located on both sides of the front end. One pre-set slot 31 has a reversible lead screw 32 installed in its center, and lead screw sleeves 33 are screwed onto both sides of the center of the lead screw 32. The other pre-set slot 31 has a guide rod 34 fixed in its center, which forms a movable guide connection with the two connecting plates 4. A hand crank 35 is fixed to one end of the reversible lead screw 32, and a slot 36 is opened in the center of one side of the hand crank 35. A threaded rod 37 is inserted into the center of the slot 36. A screw groove 38 is opened on one side of the assembly table 2. The frame 35 utilizes the threaded insertion rod 37 to form a threaded fixed connection with the threaded groove 38 and the assembly table 2. When it is necessary to clamp and position irregularly shaped graphite parts, the personnel can first place the graphite parts to be positioned stably on the top of the lifting platform provided on the fixed base 1. The lifting platform structure can be driven by an electric cylinder in the existing technology. Then, the personnel manually crank the frame 35 to rotate the positive and negative lead screws 32. As a result, the pair of lead screw sleeves 33 that interact with the lead screws can move relative to each other with their respective fixed connecting plates 4 and guide rods 34, thus moving relative to the rubber clamps provided at the inner ends of the relative connecting plates 4. The clamping block 7 can be held on both sides of the graphite part. Since a compression spring frame 6 is installed at the connection between the rubber clamping block 7 and the rotating frame 5, the elastic deformation of the compression spring and the self-guided frame in the clamping state can adaptively fill the small bumps or dimensional tolerances on the surface of the workpiece. Thus, the elastic force pushes the clamp to stick to the workpiece, avoiding the shaking caused by the gap due to rigid clamping. After stable clamping, the operator can use the threaded rod 37 pre-inserted into the preset hole of the hand crank 35 to thread it to the alignment screw groove 38 on one side of the assembly table 2, thereby avoiding affecting the clamping stability during the processing.

[0020] The flipping mechanism 8 includes fixed blocks 81, which are fixed to both sides of the back end of one of the connecting plates 4. A flipping assembly 82 is assembled at the center of the two fixed blocks 81 and around the periphery of one of the rotating frames 5. The flipping assembly 82 includes a rotating rod 821, which is movably mounted at the center of the two fixed blocks 81. A worm gear 823 is fixedly mounted around one section of the rotating rod 821, and a worm wheel 822 is fixedly mounted around one section of the rotating frame 5. The worm wheel 822 and the worm gear 823 are meshed and connected. A portable locking component 83 is installed at one end of the rotating rod 821. The portable locking component 83 includes a guide block 831, which is distributed around a section of the rotating rod 821. A guide hand sleeve 832 is guided around the guide block 831, and a limiting hole 833 is provided around the center of the guide hand sleeve 832. A limiting rod 834 is fixed to the front end of one of the connecting plates 4. The size of the limiting hole 833 around the center of the guide hand sleeve 832 matches the diameter of the limiting rod 834. When it is necessary to lock the rod during processing... When the workpiece is flipped during clamping, the operator only needs to manually guide the hand sleeve 832. Under the axial limitation of the guide block 831 set in the section between the sleeve and the rotating rod 821, the rotating rod 821 and the fixed worm gear 823 can be rotated. Thus, the worm gear 823 can drive the worm wheel 822 meshing on one side for transmission. Since a section of the rotating frame 5 is fixed in the middle of the worm wheel 822, the rotating frame 5 in the middle of this part of the connecting plate 4 can be driven to rotate actively. Since the rotating frame 5 in the middle of the other connecting plate 4 is movable, Therefore, the aforementioned active rotation can be used in conjunction with the rotating frame 5 to indirectly carry the workpiece held by a pair of rubber clamping blocks 7 for flipping operations. After flipping to a suitable angle, the operator can press the guide hand sleeve 832 under the radial guidance of the guide block 831. Thus, the corresponding limiting holes 833 located around the center of the guide hand sleeve 832 can be aligned and sleeved around the limiting rod 834, thereby fixing the flipping angle. At this time, the operator can achieve the purpose of processing different surfaces of the workpiece without re-clamping and without error.

[0021] Working principle: When it is necessary to clamp and position irregularly shaped graphite parts, the operator can first place the graphite part to be positioned stably on the top of the lifting platform on the fixed base 1. The lifting platform structure can be driven by an electric cylinder as in existing technology. Then, the operator manually cranks the hand crank 35 to rotate the forward and reverse lead screws 32. As a result, the pair of lead screw sleeves 33 that interact with the lead screws can move relative to each other with their respective fixed connecting plates 4 and guide rods 34. This continues until the rubber clamping blocks 7 set at the inner ends of the relative connecting plates 4 clamp the graphite parts on both sides. A compression spring frame 6 is installed at the connection between the rubber clamping block 7 and the rotating frame 5. In the clamping state, the elastic deformation of the compression spring and the self-guided design of the frame can adaptively fill the slight irregularities or dimensional tolerances on the workpiece surface. This elastic force pushes the clamp to adhere tightly to the workpiece, preventing wobbling caused by gaps in rigid clamping. After stable clamping, the operator can use the threaded rod 37, pre-inserted into the preset hole of the hand crank 35, to thread it onto the alignment screw groove 38 on one side of the assembly table 2. This avoids affecting the clamping stability during processing. Furthermore, during processing operations… When it is necessary to flip the workpiece while it is being clamped, the operator only needs to manually guide the hand sleeve 832. Under the axial limitation of the guide block 831 set on one section of the rotating rod 821, the rotating rod 821 and the fixed worm gear 823 can be rotated. Thus, the worm gear 823 can drive the worm wheel 822 meshing on one side for transmission. Since a rotating frame 5 is fixed in the middle of the worm wheel 822, the rotating frame 5 in the middle of this part of the connecting plate 4 can be driven to rotate actively. Since the rotating frame 5 set in the middle of the other connecting plate 4 has a movable... Therefore, the aforementioned active rotation can be used in conjunction with the rotating frame 5 to indirectly carry the workpiece held by a pair of rubber clamping blocks 7 for flipping operations. After flipping to a suitable angle, the operator can press the guide hand sleeve 832 under the radial guidance of the guide block 831. Thus, the corresponding limiting holes 833 located around the center of the guide hand sleeve 832 can be aligned and sleeved around the limiting rod 834, thereby fixing the flipping angle. At this time, the operator can achieve the purpose of processing different surfaces of the workpiece without re-clamping and without error.

[0022] All technical features in this embodiment can be freely combined according to actual needs.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning and machining fixture for irregularly shaped graphite parts, comprising a fixed base (1), characterized in that, The front end of the fixed base (1) is fixedly provided with an assembly platform (2), and an auxiliary clamping mechanism (3) is installed in the middle and on one side of the assembly platform (2). The auxiliary clamping mechanism (3) includes a pair of lead screw sleeves (33), and the inner ends of the two lead screw sleeves (33) are fixedly provided with connecting plates (4). A rotating frame (5) is movably installed in the middle of a section of the pair of connecting plates (4), and a compression spring frame (6) is installed in the inner end of the two rotating frames (5). A rubber clamping block (7) is connected to the end of the compression spring frame (6). A flipping mechanism (8) is jointly installed at the end of one of the rotating frames (5) and the back end of the connecting plate (4). The flipping mechanism (8) includes a fixing block (81) and the fixing block (81) is fixed on both sides of the back end of one of the connecting plates (4). A flipping assembly (82) is assembled in the middle of the two fixing blocks (81) and around the periphery of one of the rotating frames (5). The flipping assembly (82) includes a rotating rod (821) and a portable locking assembly (83) is installed at one end of the rotating rod (821).

2. The positioning and machining fixture for irregularly shaped graphite parts according to claim 1, characterized in that, The flipping assembly (82) includes a rotating rod (821), which is movably mounted in the middle of two fixed blocks (81). A worm gear (823) is fixed around a section of the rotating rod (821), and a worm wheel (822) is fixed around a section of one of the rotating frames (5).

3. The positioning and machining fixture for irregularly shaped graphite parts according to claim 2, characterized in that, The worm wheel (822) and the worm (823) are connected by a meshing transmission.

4. The positioning and machining fixture for irregularly shaped graphite parts according to claim 1, characterized in that, The portable locking component (83) includes a guide block (831), and the guide block (831) is disposed on a section of the periphery of the rotating rod (821). The periphery of the guide block (831) is fitted with a guide hand sleeve (832), and the periphery of the guide hand sleeve (832) is provided with a limiting hole (833). A limiting rod (834) is fixed to the front end of one of the connecting plates (4).

5. The positioning and machining fixture for irregularly shaped graphite parts according to claim 4, characterized in that, The size of the limiting holes (833) distributed around the center of the guide hand sleeve (832) matches the diameter of its limiting rod (834).

6. The positioning and machining fixture for irregularly shaped graphite parts according to claim 1, characterized in that, The auxiliary clamping mechanism (3) includes a preset groove (31), and the preset groove (31) is located on both sides of the front end of the assembly table (2). A positive and negative lead screw (32) is installed in the middle of one of the preset grooves (31), and a lead screw sleeve (33) is screwed on both sides of the middle of the positive and negative lead screw (32). A guide rod (34) is fixed in the middle of the other preset groove (31). A hand crank (35) is fixed at one end of the positive and negative lead screw (32), and a slot (36) is opened in the middle of one side of the hand crank (35). A threaded insert rod (37) is inserted in the middle of the slot (36), and a screw groove (38) is opened on one side of the assembly table (2).

7. The positioning and machining fixture for irregularly shaped graphite parts according to claim 6, characterized in that, The guide rod (34) forms a movable guide connection with its two connecting plates (4).

8. The positioning and machining fixture for irregularly shaped graphite parts according to claim 6, characterized in that, The hand crank (35) is fixedly connected to the screw groove (38) and the assembly table (2) by means of the threaded insert (37).

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