Piston tightening and punching device for oil cylinder assembly

Abstract

The utility model relates to the technical field of jack oil cylinder assembly, in particular to a piston tightening and punching device for oil cylinder assembly, which comprises a machining platform with a movable guide rail. The piston tightening mechanism, the punching mechanism, the first supporting mechanism, the second supporting mechanism and the rotation stopping mechanism are sequentially arranged on the moving guide rail in a spaced and movable mode, and the screw locking mechanism is arranged on the machining platform and adjacent to the punching mechanism. The screw locking mechanism comprises a gluing unit and a locking unit which are adjacent and arranged in a spaced mode. The device has the beneficial effects that piston tightening, punching and nail screwing are integrated, the assembly quality of the piston rod assembly is improved, the workpiece transfer frequency and the procedure switching time are reduced, and the production efficiency is improved. Gluing is carried out before the screw is locked, the screw is prevented from loosening, the sealing performance is improved, and faults caused by poor thread fit are reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic jack assembly technology, and in particular to a piston tightening and drilling device for hydraulic cylinder assembly. Background Technology

[0002] Hydraulic jack cylinders are core components of hydraulic supports in coal mines. The assembly of hydraulic jack cylinders includes processes such as cleaning, piston rod pre-assembly, piston assembly, piston rod assembly and cylinder body assembly, and testing. Among these, piston tightening, drilling, and screwing are critical steps in the piston assembly process, and their assembly quality directly affects the performance and reliability of the hydraulic jack cylinder.

[0003] Traditional methods typically involve manual assembly, which, while flexible, suffers from low production efficiency and struggles to meet the demands of mass production. Furthermore, assembly quality is inconsistent due to variations in worker skill and condition. While automated equipment for assembling hydraulic cylinder pistons exists, it usually requires multiple independent workstations or machines, resulting in low production efficiency and difficulty in guaranteeing assembly accuracy. Moreover, these machines have strict requirements on workpiece dimensions and cannot accommodate workpieces of varying sizes. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a piston tightening and drilling device for hydraulic cylinder assembly, which solves the technical problems of low production efficiency and unstable assembly accuracy in piston assembly.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model provides a piston tightening and drilling device for hydraulic cylinder assembly, comprising a processing platform with a movable guide rail, a piston tightening mechanism, a drilling mechanism, a first support mechanism, a second support mechanism, and an anti-rotation mechanism sequentially and movably arranged on the movable guide rail, and a screw fastening mechanism arranged on the processing platform adjacent to the drilling mechanism; the first support mechanism and the second support mechanism are respectively used to support the two ends of the piston rod to be processed; the anti-rotation mechanism is used to prevent the piston rod from rotating; the piston tightening mechanism is used to tighten the piston pre-fitted on the piston rod; the drilling mechanism is used to drill holes in the tightened piston; the screw fastening mechanism includes an adjacent and spaced-apart glue application unit and a fastening unit, the glue application unit is used to apply thread-locking glue to the piston hole, and the fastening unit is used to fasten screws into the piston hole after applying thread-locking glue.

[0009] Preferably, both the first support mechanism and the second support mechanism include a first support base, a lifting unit, and a support unit arranged sequentially from bottom to top. The support unit is used to support the piston rod to be processed. The first support base is movably mounted on a moving guide rail. The lifting unit can drive the support unit to rise and fall relative to the first support base, so as to drive the piston rod to rise and fall.

[0010] Preferably, the first support mechanism further includes a pressing component; the pressing component includes a first support frame, a first lifting unit and a pressing unit, the bottom of the first support frame is connected to the top of one end of the first support base, the first lifting unit can drive the pressing unit to move in the vertical direction, and the pressing unit moves vertically downward to clamp the piston rod to be processed together with the support unit.

[0011] Preferably, the support unit of the first support mechanism and the second support mechanism includes two first support rollers, which form a V-shaped groove; the pressing unit of the pressing assembly includes two second support rollers, which form a V-shaped groove.

[0012] Preferably, the anti-rotation mechanism includes a clamping unit for clamping the piston rod trunnion to prevent the piston rod from rotating, a second support base, and a first moving unit; the second support base is movably disposed on a moving guide rail; the first moving unit is connected to the side end of the second support base and is adjacent to the second support mechanism, and the first moving unit can drive the clamping unit to clamp or release the piston rod trunnion.

[0013] Preferably, the piston tightening mechanism includes a tightening unit and a support housing; the support housing is movably disposed on a moving guide rail, and the tightening unit is connected to the support housing; the tightening unit includes a tightening head for tightening the piston pre-fitted on the piston rod, and the tightening head extends toward the direction of the first support mechanism.

[0014] Preferably, the punching mechanism includes a punching unit for punching holes in the tightened piston, a second lifting unit, and a mounting plate; the second lifting unit is connected to one end of the bottom of the support housing via the mounting plate, and the second lifting unit can drive the punching unit to move vertically to the piston.

[0015] Preferably, the punching mechanism further includes a scrap collection box; the scrap collection box is connected to the bottom of the punching unit, and the scrap collection box can move together with the punching unit in the vertical direction.

[0016] Preferably, the screw fastening mechanism further includes a screw feeding unit; the screw feeding unit is connected to the side of the processing platform.

[0017] Preferably, it further includes a clamping and fixing mechanism; the clamping and fixing mechanism is located on the processing platform between the piston tightening mechanism and the first support mechanism.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a piston tightening and drilling device for hydraulic cylinder assembly, comprising a piston tightening mechanism, a drilling mechanism, and a screw fastening mechanism. It integrates piston tightening, drilling, and screw fastening into one unit, improving the assembly quality of the piston rod assembly, reducing the number of workpiece transfers, reducing process changeover time, enabling continuous assembly, and increasing production efficiency. Since the bottoms of the piston tightening mechanism, drilling mechanism, first support mechanism, second support mechanism, and anti-rotation mechanism can all move along a movable guide rail, it can assemble piston rods of different sizes. Because the screw fastening mechanism includes adjacent and spaced-apart glue-applying units and fastening units, glue is applied before fastening the screws to prevent loosening, improve sealing, further ensure the assembly quality of the piston assembly, and reduce malfunctions caused by poor thread fit. Attached Figure Description

[0021] Figure 1 This is a first-view structural schematic diagram of the piston tightening and drilling device for hydraulic cylinder assembly according to this utility model.

[0022] Figure 2 This is a second-view structural schematic diagram of the piston tightening and drilling device for hydraulic cylinder assembly according to this utility model.

[0023] Figure 3 This is a top view of the piston tightening and drilling device for hydraulic cylinder assembly according to the present invention;

[0024] Figure 4 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0025] Figure 5 for Figure 1 Enlarged schematic diagram of part B;

[0026] Figure 6 This is a schematic diagram of the internal structure of the first support mechanism;

[0027] Figure 7 This is a schematic diagram of the punching mechanism;

[0028] Figure 8 This is a schematic diagram of the piston tightening mechanism.

[0029] [Explanation of Labels in the Attached Image]

[0030] 1: Processing platform;

[0031] 2: First support mechanism; 21: First support base; 22: Lifting unit; 221: Guide column; 222: Guide sleeve; 23: Support unit; 231: First support roller; 24: Pressing assembly; 241: First support frame; 242: First lifting unit; 243: Pressing unit; 2431: Second support roller; 25: Protective shell; 26: Lifting drive motor;

[0032] 3: Second support structure;

[0033] 4: Anti-rotation mechanism; 41: Second support seat; 42: Clamping unit; 421: Base plate; 422: Connecting seat; 423: Side plate; 43: First moving unit;

[0034] 5: Piston tightening mechanism; 51: Support housing; 52: Tightening unit; 521: Tightening head; 5211: Connecting plate; 5212: Spring pin; 522: Tightening drive motor;

[0035] 6: Drilling mechanism; 61: Drilling unit; 611: Drill bit; 62: Second lifting unit; 621: Lifting guide rail; 622: Lifting sliding block; 63: Mounting plate; 64: Iron filings collection box;

[0036] 7: Testing institution; 71: Longitudinal laser sensor; 72: Color mark sensor;

[0037] 8: Screw fastening mechanism; 81: Glue application unit; 811: Glue application head; 82: Fastening unit; 821: Screw fastening head; 83: Screw feeding unit; 84: Second support frame; 85: Second moving unit; 86: Third lifting unit;

[0038] 9: Clamping and fixing mechanism; 91: Third support frame; 92: Clamping and fixing component;

[0039] 10: Moving guide rail. Detailed Implementation

[0040] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1 and Figure 3As shown, this embodiment provides a piston tightening and drilling device for hydraulic cylinder assembly. The piston tightening and drilling device includes a processing platform 1 with a movable guide rail 10, a piston tightening mechanism 5, a drilling mechanism 6, a first support mechanism 2, a second support mechanism 3, and an anti-rotation mechanism 4, which are sequentially spaced and movably arranged on the movable guide rail 10, and a screw fastening mechanism 8 arranged on the processing platform 1 and adjacent to the drilling mechanism 6. By integrating piston tightening, drilling, and screw fastening into one unit, the assembly efficiency and quality of the piston rod assembly are improved, the number of workpiece transfers is reduced, the process changeover time is reduced, continuous assembly is achieved, and production efficiency is significantly improved.

[0042] like Figure 2 As shown, the first support mechanism 2 and the second support mechanism 3 are respectively used to support the two ends of the piston rod to be processed, so as to support the piston rod and make the axis of the piston rod horizontal. In order to meet the assembly of piston rods of different specifications, the first support mechanism 2 and the second support mechanism 3 both include a lifting drive motor 26, a first support base 21, a lifting unit 22 and a support unit 23 arranged sequentially from bottom to top. The first support base 21 is movably mounted on the moving guide rail 10, such as... Figure 6 As shown, the lifting unit 22 includes a guide post 221 and a guide sleeve 222 that are slidably connected. An opening is formed in the middle of the first support base 21. The driving end of the lifting drive motor 26 passes through the opening and connects to the bottom of the guide post 221 of the lifting unit 22, thereby driving the lifting unit 22 to raise and lower the support unit 23 relative to the first support base 21, and consequently, to raise and lower the piston rod. The lifting unit 22 can adjust its center height according to piston rods of different diameters. The support unit 23 is used to support the piston rod to be processed. The support unit 23 includes two first support rollers 231, which form a V-shaped groove. That is, the support units 23 of both the first support mechanism 2 and the second support mechanism 3 are V-shaped grooves used to support the piston rod. In other words, the double V-shaped fulcrum support provides better performance.

[0043] In this embodiment, the lifting unit 22 of the first support mechanism 2 and the lifting unit 22 of the second support mechanism 3 can rise and fall together to make the axis of the piston rod horizontal.

[0044] To prevent external dust, impurities, moisture, etc. from entering the interior of the first support mechanism 2 and the second support mechanism 3, such as Figure 1 As shown, both the first support mechanism 2 and the second support mechanism 3 include a protective shell 25. The bottom of the protective shell 25 is connected to the first support base 21, and a lifting port is opened on the top of the protective shell 25 to facilitate the lifting and lowering of the support unit 23.

[0045] To fix the piston rod, such as Figure 1 and Figure 2As shown, the first support mechanism 2 also includes a pressing assembly 24, which includes a first support frame 241, a first lifting unit 242, and a pressing unit 243. The bottom of the first support frame 241 is connected to the top of one end of the first support base 21. The first lifting unit 242 includes a first lifting rod and a first lifting drive motor (not shown in the figure). The first lifting rod is connected to the pressing unit 243, and the first lifting drive motor drives the first lifting rod to move vertically, thereby driving the pressing unit 243 to move vertically. The pressing unit 243 moves vertically downward to clamp the piston rod to be processed together with the support unit 23. Figure 2 As shown, the pressing unit 243 of the pressing assembly 24 includes two second support rollers 2431. The two second support rollers 2431 form a V-shaped groove to prevent the piston rod from moving around and to achieve better stability.

[0046] It should be noted that the first support mechanism 2 and the second support mechanism 3 have similar structures. The second support mechanism 3 does not have a pressing component 24, but the rest of the structures are the same.

[0047] like Figure 2 As shown, the anti-rotation mechanism 4 includes a second support base 41, a clamping unit 42, and a first moving unit 43. The second support base 41 is movably mounted on the moving guide rail 10. The first moving unit 43 is connected to the side end of the second support base 41 and is adjacent to the second support mechanism 3. The first moving unit 43 can drive the clamping unit 42 to clamp or release the piston rod trunnion.

[0048] Specifically, the clamping unit 42 includes two base plates 421, four connecting seats 422, and two side plates 423. The base plates 421 are vertically arranged and connected to the side ends of the first moving unit 43. The side ends of the side plates 423 are connected to the base plates 421. One of the side plates 423 has a circular protrusion that can extend into the piston rod trunnion during clamping, thereby clamping the piston rod. To reinforce the side plates 423, the two connecting seats 422 are respectively connected to the top and bottom ends of the side plates 423, and both connecting seats 422 are connected to the base plates 421. The first moving unit 43 can drive the two base plates 421 to move towards or away from each other, thereby driving the two side plates 423 to move towards or away from each other, in order to clamp or release the piston rod trunnion.

[0049] like Figure 1 and Figure 8 As shown, the piston tightening mechanism 5 includes a support housing 51 and a tightening unit 52. The support housing 51 is movably mounted on the moving guide rail 10, and the tightening unit 52 is connected to the support housing 51. The central axis of the tightening unit 52 is at the same height as the central axis of the clamping unit 42 of the anti-rotation mechanism 4. In this embodiment, the support housing 51 has a cavity, and the tightening unit 52 passes through the cavity and is connected to the support housing 51.

[0050] Specifically, such as Figure 8 As shown, the tightening unit 52 includes a tightening head 521 and a tightening drive motor 522 coaxially arranged. The tightening head 521 extends towards the direction of the first support mechanism 2. The tightening head 521 includes a connecting plate 5211 and two cylindrical spring pins 5212. The two spring pins 5212 extend towards the piston end and insert into two tightening holes at the piston end. The spring pins 5212, through positioning, fixing, buffering, and guiding functions, ensure accurate alignment between the piston and the tightening head 521, improving the tightening efficiency and quality of the piston. The connecting plate 5211 has a horizontally oriented sliding groove, in which the two spring pins 5212 can slide to accommodate piston heads of different sizes. The tightening drive motor 522 can drive the mounting plate 5211 to rotate, thereby tightening the piston pre-fitted onto the piston rod.

[0051] like Figure 7 As shown, the drilling mechanism 6 includes a drilling unit 61, a second lifting unit 62, and a mounting plate 63. The second lifting unit 62 is connected to one end of the bottom of the support housing 51 via the mounting plate 63. The second lifting unit 62 includes a lifting guide rail 621 and a lifting sliding block 622. The lifting sliding block 622 is movably mounted on the lifting guide rail 621, and one end of the lifting sliding block 621 is connected to the drilling unit 61. The second lifting unit 62 can drive the drilling unit 61 to move vertically to the piston. The drilling unit 61 includes a vertically extendable drill bit 611 and a drilling drive motor (not shown in the figure). The drilling drive motor is located at the bottom of the drill bit 611 and drives the drill bit 611 to extend and retract longitudinally to drill a hole in the tightened piston.

[0052] To ensure a clean assembly environment and prevent metal shavings from affecting assembly quality, such as Figure 7 As shown, the punching mechanism 6 also includes a scrap collection box 64, which is connected to the bottom of the punching unit 61. The scrap collection box 64 can move together with the punching unit 61 in the vertical direction.

[0053] like Figure 1 and Figure 2 As shown, the screw fastening mechanism 8 is located at the rear end of the processing platform 1 and adjacent to the drilling mechanism 6. The screw fastening mechanism 8 includes a glue application unit 81, a fastening unit 82, a second support frame 84, a second moving unit 85, and a third lifting unit 86. Applying glue before fastening the screws can prevent the screws from loosening, improve the sealing performance, further ensure the assembly quality of the piston assembly, and reduce failures caused by poor thread fit.

[0054] like Figure 2As shown, the screw fastening mechanism 8 is arranged from bottom to top as follows: a second support frame 84, a second moving unit 85, and a third lifting unit 86. The second support frame 84 is located at the rear end of the processing platform 1. The second moving unit 85 can drive the third lifting unit 86 to move in the lateral direction of the processing platform 1. The glue application unit 81 and the fastening unit 82 are both connected to the side end of the third lifting unit 86. The third lifting unit 86 can drive the glue application unit 81 and the fastening unit 82 to move vertically. Figure 5 As shown, the glue application unit 81 and the fastening unit 82 are arranged adjacent to each other and are located directly above the punching mechanism 6. The glue application unit 81 includes two parallel and vertically arranged glue application heads 811 for applying thread-locking glue to the piston hole. The fastening unit 82 includes two parallel and vertically arranged screw fastening heads 821. The two screw fastening heads 821 correspond one-to-one with the two glue application heads 811. After the thread-locking glue is applied to the piston hole, the screw is fastened directly to avoid the screw hole position from shifting.

[0055] like Figure 1 and Figure 3 As shown, the screw fastening mechanism 8 also includes a screw feeding unit 83, which is connected to the side of the processing platform 1 and can provide screws to the fastening unit 82.

[0056] Optionally, to further improve the drilling accuracy, the piston-tightening drilling device also includes a detection mechanism 7, which includes a longitudinal laser sensor 71, a transverse laser sensor (not shown in the figure), and a color mark sensor 72. For example... Figure 1 and Figure 4 As shown, the longitudinal laser sensor 71 is located on the side of the processing platform 1 and adjacent to the piston tightening mechanism 5. It is used to detect the axial position of the piston. When the drilling mechanism 6 receives the axial position information of the piston, it controls the drill bit 611 to drill a hole in the piston. The transverse laser sensor is located on the second support frame 84 of the screw fastening mechanism 8. When the piston rod rotates, it detects the radial hole position of the piston. After receiving the radial hole position information of the piston, the glue applicator 81 controls the glue applicator head 811 to move to the corresponding position to apply glue to the piston hole. The color mark sensor 72 is located at the front end of the second moving unit 85 and at the bottom of the fastening unit 82. The color mark sensor 72 determines the position of the piston hole by recognizing the color of the thread glue inside the piston hole. After receiving the piston hole position information, the fastening unit 82 controls the screw fastening head 821 to move to the corresponding position to fasten the screw in the piston hole.

[0057] It should be noted that the piston tightening and drilling device in this embodiment is a physical structure. This embodiment does not involve improvements to the computer program; its main contribution to the prior art lies in the connection or structural relationships between the various components or hardware structures within the piston tightening and drilling device.

[0058] To make the piston more stable during installation, such as Figure 1 and Figure 2 As shown, the piston tightening and drilling device also includes a clamping and fixing mechanism 9, which is located on the processing platform 1 between the piston tightening mechanism 5 and the first support mechanism 2.

[0059] Specifically, the clamping and fixing mechanism 9 includes two third support frames 91 and two clamping and fixing members 92. The two third support frames 91 are respectively disposed on the processing platform 1 and are symmetrically arranged. The two clamping and fixing members 92 are slidably connected to the top of the two third support frames 91. The clamping and fixing members 92 have a Y-shaped structure and are used to clamp the piston. Since the clamping and fixing members 92 can slide on the third support frames 91, they can accommodate pistons of different sizes and shapes.

[0060] The working process of this utility model is as follows: First, the pre-assembled piston rod assembly is placed on the support unit 23 of the first support mechanism 2 and the second support mechanism 3. The height of the piston rod is adjusted by the lifting unit 22 so that the central axis of the piston rod coincides with the central axis of the tightening unit 52 of the piston tightening mechanism 5. The pressing unit 243 and the support unit 23 jointly clamp the piston rod to be processed. Next, the anti-rotation mechanism 4 moves to the piston rod trunnion, and the clamping unit 42 clamps the piston rod trunnion to prevent the piston rod from rotating. Subsequently, the first support mechanism 2, the second support mechanism 3 and the anti-rotation mechanism 4 move together to move the piston rod... The piston rod is moved to the piston tightening mechanism 5. The tightening head 521 of the tightening unit 52 extends and fits against the piston end face, and the piston is tightened by rotation. Then, the anti-rotation mechanism 4 releases the piston rod, and the drilling mechanism 6 drills holes in the piston according to the drilling position detected by the longitudinal laser sensor 71. Finally, the tightening unit 52 drives the piston rod to rotate 180°, and the glue application unit 81 applies thread-locking glue to the piston hole according to the piston hole position detected by the transverse laser sensor. Then, the fastening unit 82 fastens the screws to the piston hole after applying thread-locking glue according to the piston hole position detected by the color mark sensor 72, and finally completes the assembly of the piston rod assembly.

[0061] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0063] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A piston tightening and piercing device for oil cylinder assembly, characterized in that, The piston tightening and punching device comprises a processing platform (1) provided with a moving guide rail (10), a piston tightening mechanism (5), a punching mechanism (6), a first supporting mechanism (2), a second supporting mechanism (3) and a rotation stopping mechanism (4) which are sequentially and evenly arranged on the moving guide rail (10), and a screw locking mechanism (8) arranged on the processing platform (1) and adjacent to the punching mechanism (6); The first supporting mechanism (2) and the second supporting mechanism (3) are respectively used for supporting two ends of a piston rod to be processed; The rotation stopping mechanism (4) is used for stopping rotation of the piston rod; The piston tightening mechanism (5) is used for tightening a piston pre-sheathed on the piston rod; The punching mechanism (6) is used for punching the tightened piston; The screw locking mechanism (8) comprises a glue applying unit (81) and a locking unit (82) which are arranged adjacently and evenly, the glue applying unit (81) is used for applying thread glue to a piston hole, and the locking unit (82) is used for locking a screw to the piston hole after the thread glue is applied.

2. The piston tightening and punching device according to claim 1, wherein: The first supporting mechanism (2) and the second supporting mechanism (3) each comprise a first supporting seat (21), a jacking unit (22) and a supporting unit (23) which are sequentially arranged from bottom to top, and the supporting unit (23) is used for supporting the piston rod to be processed; The first supporting seat (21) is movably arranged on the moving guide rail (10); The jacking unit (22) can drive the supporting unit (23) to lift relative to the first supporting seat (21) so as to drive the piston rod to lift.

3. The piston tightening and punching device according to claim 2, wherein: The first supporting mechanism (2) further comprises a pressing assembly (24); The pressing assembly (24) comprises a first supporting frame (241), a first lifting unit (242) and a pressing unit (243), the bottom of the first supporting frame (241) is connected with the top of one end of the first supporting seat (21), the first lifting unit (242) can drive the pressing unit (243) to move in a vertical direction, and the pressing unit (243) moves vertically downward to clasp the piston rod to be processed together with the supporting unit (23).

4. The piston tightening and punching device according to claim 3, wherein: The supporting unit (23) of the first supporting mechanism (2) and the second supporting mechanism (3) comprises two first supporting rollers (231), and the two first supporting rollers (231) form a V-shaped notch; The pressing unit (243) of the pressing assembly (24) comprises two second supporting rollers (2431), and the two second supporting rollers (2431) form a V-shaped notch.

5. The piston tightening and punching device according to claim 1, wherein: The rotation stopping mechanism (4) comprises a clamping unit (42) for clamping a piston rod trunnion to stop rotation of the piston rod, a second supporting seat (41) and a first moving unit (43); The second supporting seat (41) is movably arranged on the moving guide rail (10); The first moving unit (43) is connected with the side end of the second support base (41) and adjacent to the second support mechanism (3), and the first moving unit (43) can drive the clamping unit (42) to clamp or release the piston rod trunnion.

6. The piston tightening and punching device according to claim 1, characterized in that: The piston tightening mechanism (5) comprises a tightening unit (52) and a support shell (51); The support shell (51) is movably arranged on the moving guide rail (10), and the tightening unit (52) is connected with the support shell (51); The tightening unit (52) comprises a tightening head (521) for tightening the piston pre-sheathed on the piston rod, and the tightening head (521) extends towards the first support mechanism (2).

7. The piston tightening and punching device according to claim 6, characterized in that: The punching mechanism (6) comprises a punching unit (61) for punching the tightened piston, a second lifting unit (62) and a mounting plate (63); The second lifting unit (62) is connected with one end of the bottom of the support shell (51) through the mounting plate (63), and the second lifting unit (62) can drive the punching unit (61) to move in the vertical direction to the piston.

8. The piston tightening and punching device according to claim 7, characterized in that: The punching mechanism (6) further comprises a iron filings collecting box (64); The iron filings collecting box (64) is connected with the bottom of the punching unit (61), and the iron filings collecting box (64) can move in the vertical direction together with the punching unit (61).

9. The piston tightening and punching device according to claim 1, characterized in that: The screw locking mechanism (8) further comprises a screw feeding unit (83); The screw feeding unit (83) is connected with the side end of the processing platform (1).

10. The piston tightening and punching device according to claim 1, characterized in that: Further comprising a clamping fixing mechanism (9); The clamping fixing mechanism (9) is located on the processing platform (1) between the interval of the piston tightening mechanism (5) and the first support mechanism (2).

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