Material pressing clamp suitable for machining of various curved surfaces

Abstract

The utility model relates to the technical field of mobile phone part machining, and particularly discloses a material pressing clamp suitable for machining various curved surfaces, which comprises a machining table, a machining base is arranged on the upper side of the machining table, and the machining base is connected with a rotating shaft piece in a buckling manner; a plurality of clamp units are mounted on the machining table; a guide rail is arranged on the lower side of the top plate, and a sliding block is installed on the guide rail. The rotating shaft piece is attracted through the electromagnet assembly, after the rotating shaft piece is attracted, the vibration unit is started, the vibration unit can drive the second lifting plate connected with the vibration unit to shake up and down, the second lifting plate which shakes up and down can pull the electromagnet assembly to shake up and down, and therefore the rotating shaft piece is pulled to move up and down in a reciprocating mode. And then the rotating shaft piece is slowly pulled to move upwards in a segmented mode, so that the rotating shaft piece and the machining base which are connected in a buckled mode can be gradually separated, and then the rotating shaft piece can be taken down from the machining table through the lifting unit and the sliding block.

Description

Technical Field

[0001] This utility model belongs to the field of mobile phone component processing technology, specifically relating to a pressure fixture suitable for processing various curved surfaces. Background Technology

[0002] Foldable phones are a type of smartphone design, and flexible AMOLED screens are the key to their breakthrough.

[0003] Foldable phones require hinges at the folding points. These hinges are mostly made of powder metallurgy and require CNC machining of their flat and curved surfaces. During machining, a fixture is used to clamp them in place. The hinges on foldable phones require high machining precision, and it's crucial to prevent them from wobbling during clamping. To avoid these issues, the hinges and the machined base are usually assembled using a snap-fit ​​connection. After the fixture presses onto the hinge, the snap-fit ​​between the hinge and the machined base increases friction, thereby enhancing stability. However, after the clamping fixture applies pressure to the pivot and the base, the friction is relatively large. When removing the pivot, it is necessary to drag the corners of the pivot and shake it up and down to slowly remove it. During this process, the corners of the pivot need to be held manually. However, the corners of the pivot are thin. When holding the corners of the pivot, the pivot will cause deep dents at the fingers. In more serious cases, the pivot will scratch the worker's fingers. Therefore, this application proposes a pressure fixture suitable for machining various curved surfaces. Utility Model Content

[0004] The purpose of this invention is to provide a pressure fixture suitable for machining various curved surfaces, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure fixture suitable for machining various curved surfaces, including a machining table, a machining base provided on the upper side of the machining table, and the machining base being snap-fitted to a rotating shaft.

[0006] The machining table is equipped with several fixture units;

[0007] It also includes a top plate, on the lower side of which a guide rail is provided, and a slider is installed on the guide rail;

[0008] A lifting unit is installed on the slider. A second lifting plate is provided on one side of the output end of the lifting unit. The output end of the lifting unit is connected to the first lifting plate. The second lifting plate is provided on the side of the first lifting plate away from the lifting unit.

[0009] A support frame is installed on the second lifting plate, a roller is rotatably mounted on the support frame, a feeding bracket is mounted on the roller, and an electromagnet assembly is installed on the side of the feeding bracket away from the roller.

[0010] The first lifting plate is equipped with a vibration unit. When the vibration unit is activated, it causes the second lifting plate connected to the vibration unit to sway up and down.

[0011] Preferably, the rotating shaft has a plurality of grooves, and the machining base has a plurality of protrusions that mate with the grooves.

[0012] Preferably, the clamping unit includes a first pressure plate and a second pressure plate. The first pressure plate has three first protrusions, the second pressure plate has two second protrusions, and two slots are provided between the three first protrusions.

[0013] Preferably, the size of the second protrusion is smaller than the size of the empty groove, and when the first pressure plate and the second pressure plate press on the upper side of the rotating shaft, the second protrusion is inserted into the empty groove.

[0014] Preferably, a pressure block is installed on the lower side of both the first protrusion and the second protrusion, and the pressure block is made of soft material.

[0015] Preferably, both the first pressure plate and the second pressure plate are connected to a power unit. The power unit includes a rotating shaft frame and a telescopic unit. The telescopic unit uses a cylinder. The output end of the cylinder is connected to one of the first pressure plate and the second pressure plate. The rotating shaft frame is closer to the rotating shaft than the output end of the cylinder.

[0016] Preferably, the guide rails are provided in two parallel directions, and the two sliders on the two guide rails are aligned.

[0017] Preferably, four guide rods are inserted at the four corners of the second lifting plate. The guide rods penetrate the first lifting plate, and springs are sleeved on the outside of the guide rods. One end of the spring is connected to the first lifting plate, and the other end of the spring is connected to the end plate, which is sleeved with the guide rod.

[0018] Preferably, a blower bracket is installed on the roller, a warm air duct is installed on the blower bracket, the warm air duct is connected to a power pump, and a heating unit is installed at the warm air duct.

[0019] Preferably, a half gear is installed on the roller, and the half gear is connected to the power gear through tooth meshing transmission. The power gear is connected to a drive unit for driving the power gear to rotate in the forward and reverse directions.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] When removing the rotating shaft from the processing table, this invention moves the electromagnet assembly to the position of the rotating shaft using a slider. Then, multiple clamping units are activated to release the rotating shaft. Next, the lifting unit is activated, which moves the electromagnet assembly downward to attract the rotating shaft. After attracting the rotating shaft, the vibration unit is activated, which causes the second lifting plate connected to it to swing up and down. The swinging second lifting plate pulls the electromagnet assembly up and down, thereby pulling the rotating shaft to move up and down reciprocally. Then, the rotating shaft is slowly pulled upward in segments. In this way, the snap-fit ​​rotating shaft and the processing base are gradually separated. Finally, the rotating shaft can be removed from the processing table using the lifting unit and the slider. Attached Figure Description

[0022] Figure 1 This is one of the structural schematic diagrams of the pressure fixture applicable to the machining of various curved surfaces in this utility model.

[0023] Figure 2 This is the second structural schematic diagram of the pressure fixture applicable to various curved surface processing in this utility model.

[0024] Figure 3 This is the third structural schematic diagram of the pressure fixture applicable to various curved surface processing in this utility model.

[0025] Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A in the middle.

[0026] In the diagram: 1. Machining table; 2. Rotating shaft; 3. Machining base; 4. Fixture unit; 401. First pressure plate; 402. Second pressure plate; 403. Rotating shaft frame; 404. Telescopic unit; 5. Top plate; 6. Guide rail; 7. Slider; 8. Lifting unit; 9. First lifting plate; 10. Second lifting plate; 11. Guide rod; 12. Spring; 13. Support frame; 14. Roller; 15. Unloading bracket; 16. Electromagnet assembly; 17. Warm air duct; 18. Power pump; 19. Half gear; 20. Power gear; 21. Vibration unit. Detailed Implementation

[0027] 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.

[0028] Reference Figures 1-4A pressure fixture suitable for machining various curved surfaces includes a machining table 1, a machining base 3 on the upper side of the machining table 1, and a snap-fit ​​connection between the machining base 3 and a rotating shaft 2. Specifically, the rotating shaft 2 has several grooves, and the machining base 3 has several protrusions that cooperate with the grooves. The grooves and protrusions are snap-fitted and detachably connected. In this way, after the machining base 3 and the rotating shaft 2 are snapped together, the rotating shaft 2 is not easy to loosen. When machining the rotating shaft 2, the rotating shaft 2 is in a stable state, which can ensure the accuracy of the rotating shaft 2 during machining.

[0029] The pivot component 2 is a component at the folding position of a three-fold mobile phone. It is a powder metallurgy part, and its outer surface needs to be machined into a flat surface and an arc surface by CNC. Before machining, it needs to be fixed by a fixture unit 4.

[0030] In order to clamp the rotating shaft 2, several clamping units 4 are installed on the processing table 1. The clamping unit 4 includes a first pressure plate 401 and a second pressure plate 402. The first pressure plate 401 is provided with three first protrusions, and the second pressure plate 402 is provided with two second protrusions. Two slots are provided between the three first protrusions. The size of the two second protrusions is smaller than the size of the two slots. When the first pressure plate 401 and the second pressure plate 402 press on the upper side of the rotating shaft 2, the second protrusions are inserted into the slots.

[0031] Specifically, pressure blocks are installed on the lower side of both the first and second protrusions. The pressure blocks are made of soft material, such as high-performance polyurethane rubber. This material can maintain its elasticity under long-term pressure and can adapt to the shape changes of different curved surfaces. Thus, when the pressure block presses on the rotating shaft 2, it presses against the flat and arc surfaces machined on the upper side of the rotating shaft 2. The pressure block matches the curved surface on the rotating shaft 2, thereby achieving the purpose of processing different curved surfaces.

[0032] More specifically, both the first pressure plate 401 and the second pressure plate 402 are connected to a power unit. The power unit is used to drive the first pressure plate 401 and the second pressure plate 402 connected to it to move up and down, so as to press the rotating shaft 2. The power unit includes a rotating shaft frame 403 and a telescopic unit 404. The telescopic unit 404 is a cylinder. The output end of the cylinder is connected to one of the first pressure plate 401 and the second pressure plate 402. The rotating shaft frame 403 is closer to the rotating shaft 2 than the output end of the cylinder. The rotating shaft frame 403 is connected to one of the first pressure plate 401 and the second pressure plate 402 through a rotating shaft.

[0033] When the cylinder is started, it can drive its output end to move up and down, thereby driving the first pressure plate 401 or the second pressure plate 402 connected to it to lift up or fall down. When the two plates fall down, they can press down the rotating shaft 2. When the two plates are lifted up, they can release the rotating shaft 2. At this time, the rotating shaft 2 can be loaded and unloaded, and the exposed area on the upper surface of the rotating shaft 2 can also be processed.

[0034] Multiple clamping units 4 work together to press the various positions of the rotating shaft 2. When machining the upper surface of the rotating shaft 2, a segmented machining method is adopted. When machining a certain area on the upper side of the rotating shaft 2, the first pressure plate 401 or the second pressure plate 402 in that area is lifted. After machining that area, the lifted first pressure plate 401 or the second pressure plate 402 is lowered. The above operation is repeated to machine all parts of the entire rotating shaft 2.

[0035] It also includes a top plate 5, which is set inside the CNC. After the component connected to the lower side of the top plate 5 is started, the machined rotating shaft 2 can be removed from the machining table 1. Specifically, a guide rail 6 is provided on the lower side of the top plate 5, and a slider 7 is installed on the guide rail 6. The slider 7 is equipped with a power function and can move along the guide rail 6, thereby driving the component on the lower side of the slider 7 to move along the guide rail 6, thereby removing the rotating shaft 2 from the machining table 1. More specifically, there are two guide rails 6, which are distributed in parallel, and the two sliders 7 on the two guide rails 6 are aligned.

[0036] It should be noted that a lifting unit 8 is installed on the slider 7. A second lifting plate 10 is provided on one side of the output end of the lifting unit 8. Specifically, the output end of the lifting unit 8 is connected to the first lifting plate 9. The second lifting plate 10 is provided on the side of the first lifting plate 9 away from the lifting unit 8. Four guide rods 11 are inserted at the four corners of the second lifting plate 10. The guide rods 11 penetrate the first lifting plate 9, and springs 12 are sleeved on the outside of the guide rods 11. One end of the spring 12 is connected to the first lifting plate 9, and the other end of the spring 12 is connected to the end plate. The end plate is sleeved with the guide rods 11.

[0037] The first lifting plate 9 and the second lifting plate 10 are designed to allow relative vertical movement between them. When the lifting unit 8 moves the electromagnet assembly 16 downward, the electromagnet assembly 16 can be flexibly pressed onto the rotating shaft 2, avoiding damage to the flat or curved surfaces processed by the rotating shaft 2. The first lifting plate 9 and the second lifting plate 10 can also be used in conjunction with the subsequent vibration unit 21. The vibration unit 21 moves the second lifting plate 10 up and down, which can shake and separate the snap-fit ​​rotating shaft 2 and the processing base 3, avoiding the resistance of the snap-fit ​​connection between the rotating shaft 2 and the processing base 3 from hindering the unloading operation of the rotating shaft 2.

[0038] Specifically, a support frame 13 is installed on the second lifting plate 10, a roller 14 is rotatably installed on the support frame 13, a feeding bracket 15 is installed on the roller 14, and an electromagnet assembly 16 is installed on the side of the feeding bracket 15 away from the roller 14. The electromagnet assembly 16 includes a suction plate, which cooperates with the upper end face of the rotating shaft 2 after processing. The lifting unit 8 can drive the roller 14 and other components to move up and down. After the upper end face of the rotating shaft 2 is processed, the rotating shaft 2 needs to be removed from the processing base 3. When the rotating shaft 2 is removed, the lifting unit 8 is activated. The lifting unit 8 can drive the electromagnet assembly 16 to move down, and the suction plate inside it will attract the upper end face of the rotating shaft 2, thereby completing the fixing of the rotating shaft 2.

[0039] During the machining of the upper surface of the rotating shaft 2, in order to avoid damage to the tool, a spraying mechanism for spraying coolant is set at the position of the CNC tool. Therefore, after the upper surface of the rotating shaft 2 is machined, some coolant will adhere to its upper surface. The presence of coolant will affect the fixing effect between the rotating shaft 2 and the suction plate. Therefore, a blower bracket is installed on the roller 14, and a warm air pipe 17 is installed on the blower bracket. The warm air pipe 17 is connected to the power pump 18. It should be mentioned that a heating unit is installed at the warm air pipe 17. The power pump 18 can send air into the warm air pipe 17. The heating unit at the warm air pipe 17 can heat the air blown out from the warm air pipe 17, thereby expelling hot air. The hot air blown onto the rotating shaft 2 can blow away the coolant adhering to the upper surface of the rotating shaft 2.

[0040] To adjust the orientation of the electromagnet assembly 16 and the heating duct 17 on the roller 14, it is necessary to rotate the roller 14. Therefore, a half gear 19 is installed on the roller 14. The half gear 19 is connected to the power gear 20 through gear meshing. The power gear 20 is connected to a drive unit for driving the power gear 20 to rotate in both directions. The drive unit can drive the power gear 20 to rotate in both directions, and the power gear 20 drives the half gear 19 to rotate, thereby driving the roller 14 to rotate. This allows the orientation of the electromagnet assembly 16 and the heating duct 17 to be adjusted so that the electromagnet assembly 16 and the heating duct 17 are respectively facing the rotating shaft 2. The former can attract the rotating shaft 2, and the latter can blow away the coolant adhering to the upper surface of the rotating shaft 2.

[0041] The rotating shaft 2 and the processing base 3 are assembled together by a snap-fit ​​connection. In order to allow the rotating shaft 2 and the processing base 3 to be separated quickly, a vibration unit 21 is installed on the first lifting plate 9. When the vibration unit 21 is activated, it drives the second lifting plate 10 connected to the vibration unit 21 to swing up and down. The swinging second lifting plate 10 can pull the electromagnet assembly 16 to swing up and down, thereby pulling the rotating shaft 2 to move up and down reciprocally, so that the snap-fit ​​connected rotating shaft 2 and processing base 3 can be separated.

[0042] Working principle:

[0043] After the plane and arc surfaces on the upper surface of the rotating shaft 2 are machined, it needs to be removed from the machining table 1. At this time, the slider 7 is activated, which moves the electromagnet assembly 16 to the position of the rotating shaft 2. Then, multiple clamping units 4 are activated to release the rotating shaft 2. After that, the lifting unit 8 is activated, which drives the electromagnet assembly 16 to move down and attract the rotating shaft 2.

[0044] After the adsorption of the rotating shaft 2, the vibration unit 21 is activated. The vibration unit 21 can drive the second lifting plate 10 connected to it to swing up and down. The swinging second lifting plate 10 can pull the electromagnet assembly 16 to swing up and down, thereby pulling the rotating shaft 2 to move up and down reciprocally. Then, the rotating shaft 2 is slowly pulled up in segments. In this way, the snap-fit ​​rotating shaft 2 and the processing base 3 can be gradually separated. Then, the rotating shaft 2 can be removed from the processing table 1 by the lifting unit 8 and the slider 7.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure fixture suitable for machining various curved surfaces, comprising a machining table (1), characterized in that, A processing base (3) is provided on the upper side of the processing table (1), and the processing base (3) is connected to the rotating shaft (2) by a snap-fit. The processing table (1) is equipped with several clamping units (4); It also includes a top plate (5), on the lower side of which a guide rail (6) is provided, and a slider (7) is installed on the guide rail (6); A lifting unit (8) is installed on the slider (7). A second lifting plate (10) is provided on one side of the output end of the lifting unit (8). The output end of the lifting unit (8) is connected to the first lifting plate (9). The second lifting plate (10) is provided on the side of the first lifting plate (9) away from the lifting unit (8). A support frame (13) is installed on the second lifting plate (10), a roller (14) is rotatably installed on the support frame (13), a feeding bracket (15) is installed on the roller (14), and an electromagnet assembly (16) is installed on the side of the feeding bracket (15) away from the roller (14). A vibration unit (21) is installed on the first lifting plate (9). When the vibration unit (21) is activated, it causes the second lifting plate (10) connected to the vibration unit (21) to sway up and down.

2. The blanking fixture suitable for machining various curved surfaces according to claim 1, characterized in that, The rotating shaft (2) has several grooves, and the machining base (3) has several protrusions that cooperate with the grooves.

3. A blanking fixture suitable for machining various curved surfaces according to claim 1, characterized in that, The clamping unit (4) includes a first pressure plate (401) and a second pressure plate (402). The first pressure plate (401) has three first protrusions, and the second pressure plate (402) has two second protrusions. Two slots are provided between the three first protrusions.

4. A blanking fixture suitable for machining various curved surfaces according to claim 3, characterized in that, The size of the second protrusion is smaller than the size of the empty groove, and when the first pressure plate (401) and the second pressure plate (402) press on the upper side of the rotating shaft (2), the second protrusion is inserted into the empty groove.

5. A blanking fixture suitable for machining various curved surfaces according to claim 4, characterized in that, Both the first protrusion and the second protrusion have pressure blocks installed on their lower sides, and the pressure blocks are made of soft material.

6. A blanking fixture suitable for machining various curved surfaces according to claim 5, characterized in that, The first pressure plate (401) and the second pressure plate (402) are both connected to the power unit. The power unit includes a rotating shaft frame (403) and a telescopic unit (404). The telescopic unit (404) is a cylinder. The output end of the cylinder is connected to one of the first pressure plate (401) and the second pressure plate (402). The rotating shaft frame (403) is closer to the rotating shaft (2) than the output end of the cylinder.

7. A blanking fixture suitable for machining various curved surfaces according to claim 1, characterized in that, The guide rail (6) is provided in two parallel sections, and the two sliders (7) on the two guide rails (6) are aligned.

8. A blanking fixture suitable for machining various curved surfaces according to claim 1, characterized in that, Four guide rods (11) are inserted at the four corners of the second lifting plate (10). The guide rods (11) penetrate the first lifting plate (9), and springs (12) are sleeved on the outside of the guide rods (11). One end of the spring (12) is connected to the first lifting plate (9), and the other end of the spring (12) is connected to the end plate. The end plate is sleeved with the guide rods (11).

9. A blanking fixture suitable for machining various curved surfaces according to claim 1, characterized in that, A blower bracket is installed on the roller (14), and a warm air pipe (17) is installed on the blower bracket. The warm air pipe (17) is connected to a power pump (18), and a heating unit is installed at the warm air pipe (17).

10. A blanking fixture suitable for machining various curved surfaces according to claim 1, characterized in that, A half gear (19) is installed on the roller (14). The half gear (19) is connected to the power gear (20) through tooth meshing transmission. The power gear (20) is connected to a drive unit for driving the power gear (20) to rotate in both directions.

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