A trimming device for PTFE piston ring after moulding

Abstract

The utility model relates to a kind of PTFE piston ring trimming processing equipment, specifically a kind of PTFE piston ring trimming processing equipment after moulding, including equipment frame and the processing table and support seat of being set in the equipment frame and the cylinder of being set on the support seat, the top of the processing table is provided with piston ring body, the top of the processing table is equipped with limit seat and the outer expansion positioning mechanism for positioning and righting piston ring body by being set on the limit seat, the utility model: by configuring down-pressing type annular cutter, realize the synchronous cutting of piston ring inside and outside ring burr;Before cutting, the preset multiple groups of outer expansion arc-shaped pieces of inner ring side can be expanded outward synchronously, so that it is closely attached with piston ring inner ring wall, can accurately position piston ring under cutter, can accurately right piston ring position, ensure that it is stably positioned under annular cutter, effectively avoid cutting failure caused by position deviation, provide solid protection for subsequent cutting operation.

Description

Technical Field

[0001] This utility model relates to a PTFE piston ring trimming equipment, specifically a PTFE piston ring trimming equipment after molding and shaping. Background Technology

[0002] PTFE piston rings are ring-shaped components made primarily of polytetrafluoroethylene (PTFE). They are typically fitted into piston ring grooves and their main function is to seal the gap between the piston and the cylinder, preventing gas or fluid leakage. Thanks to PTFE's excellent properties such as resistance to high and low temperatures, corrosion resistance, and low coefficient of friction, PTFE piston rings can easily cope with a variety of complex working conditions, ensuring stable operation and efficient operation of equipment.

[0003] The piston ring molding and shaping device is a key production and processing equipment. It uses a mold to apply pressure and combines it with a precise temperature control system to press PTFE raw materials into a shape that meets specific ring size requirements, thereby achieving the structural shaping of the piston ring. After the molding and shaping process is completed, the resulting piston ring often has a certain degree of burrs remaining on the inner and outer rings. These burrs need to be further trimmed to ensure the dimensional accuracy and surface quality of the piston ring, so that it can better meet the sealing performance requirements in practical applications. Therefore, the piston ring needs to be trimmed and deburred.

[0004] Current trimming equipment typically uses ring cutters to simultaneously remove burrs from the inner and outer rings of piston rings by cutting from above and below. However, before cutting, the piston rings need to be precisely positioned so that the inner and outer rings are aligned vertically with the ring cutter above. During this process, the piston rings are prone to misalignment due to incorrect positioning, which can affect the trimming accuracy, resulting in overcutting on one side or burr residue, making it difficult to guarantee the trimming quality. Utility Model Content

[0005] The purpose of this invention is to provide a PTFE piston ring trimming device after molding and shaping, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A PTFE piston ring trimming device after molding and shaping includes a device frame, a processing table and a support seat disposed within the device frame, and a cylinder disposed on the support seat. The piston ring body is disposed on the top of the processing table, a limiting seat is installed on the top of the processing table, and an outward expansion positioning mechanism disposed on the limiting seat for positioning and aligning the piston ring body is disposed on the limiting seat. A deflection limiting mechanism is disposed on the bottom of the processing table for driving the outward expansion positioning mechanism to perform outward expansion action. A downward pressing cutting mechanism is disposed on the cylinder for cutting and trimming the piston ring body.

[0008] The PTFE piston ring trimming equipment after molding and shaping as described above: the outward positioning mechanism includes six slide grooves opened on the top of the limiting seat and a return spring set on the slide grooves, and a rotating shaft is rotatably installed at the bottom of the limiting seat.

[0009] The PTFE piston ring trimming equipment after molding and shaping as described above: the outward positioning mechanism also includes six outwardly expanding arc-shaped parts that are slidably installed on six slide grooves respectively. The six outwardly expanding arc-shaped parts are respectively connected to six return springs, and a column is installed on the top of the outwardly expanding arc-shaped parts.

[0010] The PTFE piston ring trimming equipment after molding and shaping as described above: the deflection limiting mechanism includes a turntable fixedly sleeved on the rotating shaft and six limiting grooves opened on the turntable, and the column is slidably installed in the limiting grooves.

[0011] The PTFE piston ring trimming equipment after molding and shaping as described above: the deflection limiting mechanism also includes a deflection plate fixedly sleeved on the bottom of the rotating shaft and a rotating handle rotatably installed on the bottom of the deflection plate.

[0012] The PTFE piston ring trimming equipment after molding and shaping as described above includes a pressure plate installed at the bottom of the cylinder and a first ring cutter and a second ring cutter fixed at the bottom of the pressure plate. The first ring cutter and the second ring cutter correspond to the inner ring and outer ring of the piston ring body, respectively.

[0013] The PTFE piston ring trimming equipment described above after molding and shaping: the arc edges of the six outwardly expanding arc-shaped parts are all in contact with the inner ring of the piston ring body, and the first ring cutter and the second ring cutter are concentric with the upper and lower positions of the rotating shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are: by configuring a downward-pressing ring cutter, the burrs on the inner and outer rings of the piston ring can be removed simultaneously; before cutting, multiple sets of outward-expanding arc-shaped parts preset on the inner ring side can expand outward simultaneously, so that they fit tightly against the inner ring wall of the piston ring, which can quickly and accurately position the piston ring directly under the cutter, accurately align the piston ring position, and ensure that it is stably located directly under the ring cutter, effectively avoiding cutting errors caused by positional deviations, and providing a solid guarantee for subsequent cutting operations.

[0015] This utility model integrates the positioning and cutting processes, eliminating the need for manual calibration and preventing PTFE from undergoing cold flow deformation due to repeated stress adjustments, thus improving the consistency of mass production. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the equipment for trimming PTFE piston rings after molding.

[0017] Figure 2 This is a top view of the PTFE piston ring trimming equipment after molding.

[0018] Figure 3 This is a schematic diagram of the processing table, support base, deflection limiting mechanism, outward expansion positioning mechanism, cylinder, and downward cutting mechanism in the trimming equipment for PTFE piston rings after molding.

[0019] Figure 4 This is a schematic diagram of the processing table, deflection limiting mechanism, and outward positioning mechanism in the PTFE piston ring trimming equipment after molding.

[0020] Figure 5 A top view of the deflection limiting mechanism and the outward expansion positioning mechanism in the PTFE piston ring trimming equipment after molding.

[0021] Figure 6 This is a schematic diagram of the deflection limiting mechanism and the outward expansion positioning mechanism in the trimming equipment for PTFE piston rings after molding.

[0022] Figure 7 A schematic diagram of the deflection limiting mechanism, the outward expansion positioning mechanism, and the outward expansion state structure of the piston ring body in the trimming equipment for PTFE piston rings after molding and shaping.

[0023] Figure 8 A disassembled structural diagram of the deflection limiting mechanism and the outward expansion positioning mechanism in the PTFE piston ring trimming equipment after molding.

[0024] Figure 9 A schematic diagram of the downward cutting mechanism in the edge trimming equipment for molded PTFE piston rings.

[0025] In the diagram: 1. Equipment frame; 2. Machining table; 3. Support base; 4. Cylinder; 5. Piston ring body; 6. Limiting seat; 7. Slide groove; 8. Return spring; 9. Rotating shaft; 10. Outwardly expanding arc-shaped part; 11. Column; 12. Turntable; 13. Limiting groove; 14. Deflection plate; 15. Rotating handle; 16. Lower pressure plate; 17. First ring cutter; 18. Second ring cutter. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Please see Figures 1-9 As an embodiment of this utility model, the PTFE piston ring trimming equipment after molding and shaping includes an equipment frame 1, a processing table 2 and a support base 3 disposed within the equipment frame 1, and a cylinder 4 disposed on the support base 3. The processing table 2 has a piston ring body 5 disposed on its top, a limiting seat 6 and an outward expansion positioning mechanism disposed on the limiting seat 6 for positioning and aligning the piston ring body 5 are mounted on the top of the processing table 2, a deflection limiting mechanism for driving the outward expansion positioning mechanism to perform outward expansion action is disposed on the bottom of the processing table 2, and a downward pressing cutting mechanism for cutting and trimming the piston ring body 5 is disposed on the cylinder 4.

[0028] In this embodiment, before cutting, the piston ring body 5 is first placed on the top of the processing table 2. Then, through the coordinated cooperation of the deflection limiting mechanism and the outward expansion positioning mechanism, the outward expansion positioning mechanism can be synchronously expanded outward, so that it fits tightly against the inner ring wall of the piston ring body 5. This can quickly and accurately position the piston ring body 5 directly under the downward cutting mechanism, accurately align the piston ring position, and ensure that it is stably located directly under the ring cutter. This effectively avoids cutting errors caused by positional deviations and provides a solid guarantee for subsequent cutting operations.

[0029] As a further embodiment of this utility model, the outward positioning mechanism includes six sliding grooves 7 formed on the top of the limiting seat 6 and a return spring 8 disposed on the sliding grooves 7, and a rotating shaft 9 is rotatably mounted on the bottom of the limiting seat 6.

[0030] In this embodiment, the limiting seat 6 is installed on the top of the processing table 2, and six sliding grooves 7 are provided on the limiting seat 6. A return spring 8 is installed at one end of each of the six sliding grooves 7.

[0031] As a further embodiment of this utility model, the outward positioning mechanism also includes six outwardly expanding arc-shaped parts 10 that are slidably mounted on six sliding grooves 7 respectively. The six outwardly expanding arc-shaped parts 10 are respectively connected to six return springs 8, and a column 11 is installed on the top of each outwardly expanding arc-shaped part 10.

[0032] In this embodiment, six outwardly expanding arc-shaped members 10 are respectively installed on six sliding grooves 7, and six return springs 8 elastically reset the six outwardly expanding arc-shaped members 10 respectively.

[0033] As a further embodiment of this utility model, the deflection limiting mechanism includes a turntable 12 fixedly sleeved on the rotating shaft 9 and six limiting grooves 13 formed on the turntable 12, and the column 11 is slidably installed in the limiting grooves 13.

[0034] In this embodiment, the six limiting grooves 13 on the turntable 12 correspond to the six pillars 11 respectively, and the six limiting grooves 13 respectively limit the sliding position of the six pillars 11.

[0035] As a further embodiment of this utility model, the deflection limiting mechanism also includes a deflection plate 14 fixedly sleeved on the bottom of the rotating shaft 9 and a rotating handle 15 rotatably installed on the bottom of the deflection plate 14.

[0036] In this embodiment, the deflection plate 14 is fixedly connected to the rotating shaft 9, and the rotating handle 15 is rotatably installed at the bottom of the deflection plate 14.

[0037] As a further embodiment of this utility model, the downward cutting mechanism includes a downward pressure plate 16 installed at the bottom of the cylinder 4 and a first ring cutter 17 and a second ring cutter 18 fixed at the bottom of the downward pressure plate 16. The first ring cutter 17 and the second ring cutter 18 correspond to the inner ring and outer ring of the piston ring body 5, respectively.

[0038] In this embodiment, the first ring cutter 17 and the second ring cutter 18 provided on the lower pressure plate 16 fixed at the bottom of the cylinder 4 are used to cut the inner and outer rings of the piston ring body 5. The first ring cutter 17 acts on the inner ring, and the second ring cutter 18 acts on the outer ring.

[0039] As a further embodiment of this utility model, the arc edges of the six outwardly expanding arc-shaped parts 10 are all in contact with the inner ring of the piston ring body 5, and the first ring cutter 17 and the second ring cutter 18 are concentric with the upper and lower positions of the rotating shaft 9.

[0040] In this embodiment, the piston ring body 5 is first placed on the top of the processing table 2. Then, the rotating handle 15 is held and the deflection plate 14 is slightly deflected to one end, causing the deflection plate 14 to drive the rotating shaft 9 to rotate. At the same time, the rotating shaft 9 drives the turntable 12 to rotate. At this time, the limiting groove 13 on the turntable 12 changes position accordingly, and the limiting of the column 11 will change. At the same time, the return spring 8 pops out and drives the outwardly expanding arc-shaped part 10 to slide outward. The column 11 will stop at the outermost side of the limiting groove 13. At this time, multiple outwardly expanding arc-shaped parts 10 slide outward, so that they are tightly attached to the inner ring wall of the piston ring body 5. This can quickly and accurately position the piston ring body 5 directly below the downward cutting mechanism, accurately align the piston ring position, and ensure that it is stably located directly below the ring cutter. Then, the cylinder 4 is started to drive the first ring cutter 17 and the second ring cutter 18 to switch downward, and perform edge trimming on the inner and outer rings of the piston ring body 5.

[0041] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A PTFE piston ring trimming device after molding and shaping, comprising a device frame (1), a processing table (2) and a support base (3) disposed within the device frame (1), and a cylinder (4) disposed on the support base (3), characterized in that, The top of the processing table (2) is provided with a piston ring body (5), the top of the processing table (2) is provided with a limiting seat (6) and an outward expansion positioning mechanism provided on the limiting seat (6) for positioning and aligning the piston ring body (5), the bottom of the processing table (2) is provided with a deflection limiting mechanism for driving the outward expansion positioning mechanism to perform outward expansion action, and the cylinder (4) is provided with a downward pressing cutting mechanism for cutting and trimming the piston ring body (5).

2. The PTFE piston ring trimming equipment after molding and shaping according to claim 1, characterized in that, The external positioning mechanism includes six slide grooves (7) opened on the top of the limiting seat (6) and a return spring (8) set on the slide groove (7). A rotating shaft (9) is rotatably installed at the bottom of the limiting seat (6).

3. The PTFE piston ring trimming equipment after molding and shaping according to claim 2, characterized in that, The outward positioning mechanism also includes six outwardly expanding arc-shaped parts (10) that are slidably mounted on six slide grooves (7). The six outwardly expanding arc-shaped parts (10) are respectively connected to six return springs (8). A column (11) is installed on the top of the outwardly expanding arc-shaped parts (10).

4. The PTFE piston ring trimming equipment after molding and shaping according to claim 3, characterized in that, The deflection limiting mechanism includes a turntable (12) fixedly sleeved on the rotating shaft (9) and six limiting grooves (13) opened on the turntable (12), and the column (11) is slidably installed in the limiting grooves (13).

5. The PTFE piston ring trimming equipment after molding and shaping according to claim 4, characterized in that, The deflection limiting mechanism also includes a deflection plate (14) fixedly sleeved at the bottom of the rotating shaft (9) and a rotating handle (15) rotatably mounted at the bottom of the deflection plate (14).

6. The PTFE piston ring trimming equipment after molding and shaping according to claim 5, characterized in that, The pressure-type cutting mechanism includes a pressure plate (16) installed at the bottom of the cylinder (4) and a first ring cutter (17) and a second ring cutter (18) fixed at the bottom of the pressure plate (16). The first ring cutter (17) and the second ring cutter (18) correspond to the inner ring and outer ring of the piston ring body (5), respectively.

7. The PTFE piston ring trimming equipment after molding and shaping according to claim 6, characterized in that, The arc edges of the six outwardly expanding arc-shaped parts (10) are all in contact with the inner ring of the piston ring body (5), and the first ring cutter (17) and the second ring cutter (18) are concentric with the upper and lower positions of the rotating shaft (9).

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