Clamping device of piston ring forming mill

Abstract

The utility model relates to the technical field of piston ring machining, in particular to a piston ring forming mill clamping device which comprises a fixed ejector block, a movable ejector block, a sliding block, a lead screw and a driving assembly. A clamping rod and a core shaft are arranged at the two ends of the fixed top block respectively, a cylindrical groove is formed in the core shaft, and a plurality of through holes are formed in the core shaft; a plurality of clamping grooves are formed in the inner wall of the movable ejection block; the sliding block is arranged in the cylindrical groove in a sliding mode, a plurality of sets of first tensioning assemblies are arranged on the sliding block, the movable end of each set of first tensioning assembly is connected with a wedge-shaped clamping block, and each wedge-shaped clamping block is inserted into the clamping groove in the corresponding side; the lead screw is located in the cylindrical groove and rotationally connected with the fixed top block, and the lead screw penetrates through the sliding block and is spirally connected with the sliding block. The driving assembly is arranged on the lead screw and drives the lead screw to rotate in the working state. According to the utility model, the number of scattered parts is small, loss can be avoided, and the operation is simple and convenient when the piston ring is locked or loosened.

Description

Technical Field

[0001] This utility model relates to the field of piston ring processing technology, specifically to a piston ring forming grinding clamping device. Background Technology

[0002] Piston ring forming grinding clamps are special fixtures used to fix and position piston ring workpieces during the piston ring manufacturing process. Through the coordinated action of the fixed top block and the movable top block, the two extensions of the haptic (the positioning component of the piston ring) are automatically closed, and the piston ring is firmly fixed in the grinding position. This ensures that the piston ring maintains a precise radial surface position during the grinding process, meeting the high-precision profile processing requirements of oil rings, barrel rings, and other similar products.

[0003] Currently, when processing piston rings, the piston rings need to be fitted onto a mandrel with a fixed top block, the fixed top block is clamped with a chuck on a machine tool, a movable top block is fitted onto the fixed top block, and the distance between the movable top block and the fixed top block is adjusted with bolts to lock a set of piston rings.

[0004] However, the clamping device has many separate parts and requires tools to tighten the bolts, making loading and unloading of piston rings quite troublesome and requiring improvement. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a piston ring forming grinding clamping device.

[0006] The technical solution of this utility model is: a piston ring forming grinding clamping device, including a fixed top block, a clamping rod and a mandrel respectively provided at both ends of the fixed top block, a cylindrical groove provided on the mandrel, and a plurality of through holes communicating with the cylindrical groove arranged in a ring array around the axis of the cylindrical groove on the mandrel.

[0007] The movable top block is sleeved on the spindle and slides along its axial direction. Several slots are arranged in a ring array around its axis on the inner wall of the movable top block, and the movable top block always covers the through hole when it is sliding.

[0008] The first slider is slidably disposed in the cylindrical groove. Several sets of first tensioning components are arranged in a circular array around its axis on the first slider. The movable end of each set of first tensioning components is connected to a wedge-shaped locking block, and each wedge-shaped locking block is inserted into the corresponding side of the locking groove.

[0009] A lead screw is located in a cylindrical groove and is rotatably connected to a fixed top block. The lead screw passes through the first slider and is helically connected to it.

[0010] And a drive assembly, which is mounted on the lead screw. In the working state, the drive assembly drives the lead screw to rotate so that the first slider moves away from or near the fixed top block. When the wedge-shaped block touches the edge of the through hole away from the fixed top block, it automatically retracts and disengages from the slot.

[0011] Preferably, a number of guide protrusions are arranged in a circular array around the axis of the cylindrical groove, and a number of grooves that are adapted to each guide protrusion are provided on the outer wall of the first slider.

[0012] Preferably, the inner wall of the movable top block is provided with several guide grooves with openings facing the fixed top block, and each guide groove is connected to the corresponding slot.

[0013] Preferably, the drive assembly includes a turntable, a handle, and a gear ring. A slide rod is coaxially arranged on the turntable. The end of the slide rod away from the turntable is inserted into the lead screw and slides along its axial direction. The handle is disposed on the turntable off from the axis of the turntable. The gear ring is connected to the end of the turntable near the lead screw. A toothed groove is provided at the end of the spindle away from the fixed top block. The gear ring slides into the toothed groove and meshes with it.

[0014] Preferably, a groove is provided on the lead screw, a second slider is provided in the groove, and the slide rod is inserted into the groove and connected to the second slider.

[0015] Preferably, it also includes a beetle bouncer, which includes a ball and a spring self-locking device. A second tensioning component is provided in the groove. The second slider is connected to the movable end of the second tensioning component. The ball is connected to the end of the second slider away from the slide bar. The spring self-locking device is connected to the bottom surface of the groove. In the unlocked state, the second tensioning component of the beetle bouncer pushes the second slider and causes the toothed ring to disengage from the tooth groove.

[0016] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0017] By setting a slider, wedge-shaped locking block, and lead screw on the mandrel, and setting a locking groove on the movable top block, the wedge-shaped locking block is inserted into the locking groove. Rotating the lead screw can drive the movable top block to gradually move closer to or away from the fixed top block, thus facilitating the clamping and fixing of the piston ring. By setting a sliding rod on the lead screw, the sliding rod is connected to a turntable, the turntable is connected to a gear ring, and a toothed groove is set at the end of the mandrel, which facilitates the rotational limitation of the lead screw when the gear ring is locked in the toothed groove. By setting a second tensioning component and a beetle-shaped rebound device at the end of the lead screw, it is easy to maintain the positional relationship between the gear ring and the toothed groove, and prevent the gear ring from automatically disengaging from the toothed groove when the device rotates at high speed with the chuck. At the same time, this device has only two separate parts, and the disassembly and assembly operations are simple and convenient. Attached Figure Description

[0018] Figure 1 This is a perspective view of one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of each component on the fixed top block in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the movable top block;

[0021] Figure 4 This is a schematic diagram of the connection structure of the various components on the mandrel;

[0022] Figure 5 This is a schematic diagram of the connection structure between the lead screw and the drive assembly.

[0023] Reference numerals: 1. Fixed top block; 2. Locking rod; 3. Mandrel; 301. Cylindrical groove; 302. Through hole; 303. Guide protrusion; 304. Gear groove; 4. Movable top block; 41. Locking groove; 42. Guide groove; 5. Slider; 501. Groove; 6. First tensioning assembly; 7. Wedge-shaped locking block; 8. Lead screw; 801. Slide groove; 9. Slide rod; 10. Turntable; 11. Handle; 12. Gear ring; 13. Second tensioning assembly; 14. Slider; 15. Beetle bouncer; 151. Bumper ball; 152. Spring self-locking device. Detailed Implementation

[0024] Example 1

[0025] like Figures 1-5As shown, the present invention proposes a piston ring forming grinding clamping device, comprising a fixed top block 1, a movable top block 4, a first slider 5, a lead screw 8, and a drive assembly. The fixed top block 1 has a locking rod 2 and a mandrel 3 at its two ends, respectively. The mandrel 3 has a cylindrical groove 301, and several through holes 302 communicating with the cylindrical groove 301 are arranged in a circular array around the axis of the cylindrical groove 301. The movable top block 4 is an annular component, fitted onto the mandrel 3 and sliding along its axial direction. Several locking grooves 41 are arranged in a circular array around the axis of the movable top block 4, and the movable top block 4 always covers the through holes 302 while sliding on the mandrel 3. The first slider 5 is slidably disposed within the cylindrical groove 301, and several guide protrusions 303 are arranged in a circular array around the axis of the cylindrical groove 301. Several grooves 501 adapted to each guide protrusion 303 are arranged on the outer wall of the first slider 5. Several sets of first tensioning components 6 are arranged in a circular array around the axis of the first slider 5. The movable end of each set of first tensioning components 6 is connected to a wedge-shaped locking block 7, and each wedge-shaped locking block 7 is inserted into the corresponding side of the locking groove 41. The first tensioning component 6 includes two permanent magnets. Several limiting grooves are provided on the first slider 5. Each wedge-shaped locking block 7 is inserted into the corresponding side of the limiting groove and slidably connected to its inner wall. The two permanent magnets are respectively set on the inner wall of the limiting groove and on the wedge-shaped locking block 7, and the magnetic poles of the two permanent magnets are the same at the adjacent ends. The lead screw 8 is located in the cylindrical groove 301 and is rotatably connected to the fixed top block 1. The lead screw 8 passes through the first slider 5 and is helically connected to it. The drive assembly is mounted on the lead screw 8 and includes a turntable 10, a handle 11, and a gear ring 12. A slide rod 9 is coaxially mounted on the turntable 10. The end of the slide rod 9 away from the turntable 10 is inserted into the lead screw 8 and slides along its axial direction. The handle 11 is mounted on the turntable 10 off-center from its axis. The gear ring 12 is connected to the end of the turntable 10 near the lead screw 8. A toothed groove 304 is provided at the end of the spindle 3 away from the fixed top block 1. The gear ring 12 slides into and meshes with the toothed groove 304. A slide groove 801 is provided on the lead screw 8, and a second slider 14 is provided in the slide groove 801. The slide rod 9 is inserted into the slide groove 801 and connected to the second slider 14. In operation, the drive assembly drives the lead screw 8 to rotate, thereby causing the first slider 5 to move away from or near the fixed top block 1. The wedge-shaped locking block 7 automatically retracts and disengages from the slot 41 when it contacts the edge of the through hole 302 away from the fixed top block 1.

[0026] It should be noted that the lead screw 8 in this embodiment is a ball screw.

[0027] In this invention, when piston rings need to be clamped, the piston rings are first fitted onto the spindle 3. Then, the turntable 10 is pulled outward, causing the toothed ring 12 to slide and disengage from the toothed groove 304. The turntable 10 is then driven to rotate by the handle 11. The turntable 10 rotates the lead screw 8 via the slide rod 9, causing the first slider 5 to slide, allowing the wedge-shaped locking block 7 to extend along the through hole 302. Next, the movable top block 4 is fitted onto the spindle 3, aligning the locking grooves 41 with the corresponding wedge-shaped locking blocks 7. The movable top block 4 is then pressed, causing the wedge-shaped locking blocks 7 to engage with their respective sides. Inside the side slot 41, the plane of the wedge-shaped locking block 7 fits against the side of the slot 41 closest to the fixed top block 1. The turntable 10 continues to rotate, driving the lead screw 8 to rotate. The first slider 5 continues to slide and, through the wedge-shaped locking block 7, drives the movable top block 4 towards the fixed top block 1 until all piston rings are pressed together. At this point, the turntable 10 is pushed to engage the gear ring 12 into the gear groove 304. The movable top block 4 always keeps the through hole 41 closed, effectively preventing debris from falling into the cylindrical groove 301 and the through hole 302. The chuck on the machine tool is then used to clamp the locking rod 2. After the piston rings are processed, the turntable 10 is pulled outwards, causing the gear ring 12 to disengage from the gear groove 304, thus releasing the rotational limit on the lead screw 8. The first slider 5 slides back until the wedge-shaped locking block 7 touches the upper wall of the through hole 301 and then retracts, allowing the movable top block 4 and piston rings to be removed.

[0028] Example 2

[0029] like Figure 2 and Figure 3 As shown, the piston ring forming grinding clamping device proposed in this utility model, compared with the first embodiment, has a plurality of guide grooves 42 with openings facing the fixed top block 1 on the inner wall of the movable top block 4, and each guide groove 42 is connected to the corresponding side slot 41.

[0030] In this embodiment, a guide groove 42 is provided so that when the movable top block 4 is assembled, the guide groove 42 on the movable top block 4 is aligned with one end of the wedge-shaped card block 7 protruding through the through hole 302, thereby facilitating the quick and accurate insertion of the wedge-shaped card block 7 into the card slot 41 and improving the assembly efficiency of the movable top block 4.

[0031] Example 3

[0032] like Figure 5As shown, the piston ring forming grinding clamping device proposed in this utility model, compared with Embodiment 1 or Embodiment 2, also includes a beetle bouncer 15. The beetle bouncer 15 includes a ball 151 and a spring self-locking device 152. A second tensioning component 13 is provided in the slide groove 801. The second tensioning component 13 includes, but is not limited to, a spring rod. The fixed end of the spring rod is connected to the inner wall of the slide groove 801. The second slider 14 is connected to the movable end of the spring rod. The ball 151 is connected to the end of the second slider 14 away from the slide rod 9. The spring self-locking device 152 is connected to the bottom surface of the slide groove 801. In the unlocked state, the second tensioning component 13 pushes the second slider 14 and causes the toothed ring 12 to disengage from the toothed groove 304.

[0033] In an optional embodiment, when the lead screw 8 needs to be rotated, the turntable 10 is pressed once. The turntable 10 drives the slide bar 9 and the second slider 14 to slide, thereby pushing the ball 151 to squeeze the trigger of the spring self-locking device 152. The opening of the spring self-locking device 152 opens, and the ball 151 separates from the spring self-locking device 152. At this time, the spring bar pushes the second slider 14 and causes the toothed ring 12 to slide out of the toothed groove 304, thereby engaging the rotational locking of the lead screw 8. At this time, the turntable 10 can be rotated. When the lead screw 8 needs to be locked, the turntable 10 is pressed again to make the ball 151 re-engage in the spring self-locking device 152, and at the same time, the toothed ring 12 is re-engaged in the toothed groove 304 in a new position. This structure makes the rotational locking and unlocking operation of the lead screw 15 simple and convenient.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A piston ring forming grinding clamping device, characterized in that, include: A fixed top block (1) is provided with a locking rod (2) and a spindle (3) at both ends of the fixed top block (1). A cylindrical groove (301) is provided on the spindle (3), and several through holes (302) communicating with the cylindrical groove (301) are arranged in a ring array around the axis of the cylindrical groove (301) on the spindle (3). The movable top block (4) is sleeved on the spindle (3) and slides along its axis. Several slots (41) are arranged in a ring array around its axis on the inner wall of the movable top block (4), and the movable top block (4) always covers the through hole (302) when it is sliding. The first slider (5) is slidably disposed in the cylindrical groove (301). Several sets of first tensioning components (6) are arranged in a ring array around the axis of the first slider (5). The movable end of each set of first tensioning components (6) is connected to a wedge-shaped block (7). Each wedge-shaped block (7) is inserted into the corresponding side groove (41). The lead screw (8) is located in the cylindrical groove (301) and is rotatably connected to the fixed top block (1). The lead screw (8) passes through the first slider (5) and is helically connected to it. And a drive assembly, which is mounted on the lead screw (8). When the drive assembly is in operation, it drives the lead screw (8) to rotate so that the first slider (5) moves away from or near the fixed top block (1) through the lead screw (8). The wedge-shaped block (7) automatically retracts and disengages from the slot (41) when it contacts the edge of the through hole (302) away from the fixed top block (1).

2. The piston ring forming grinding clamping device according to claim 1, characterized in that, Several guide protrusions (303) are arranged in a ring array around the axis of the cylindrical groove (301), and several grooves (501) that are adapted to each guide protrusion (303) are arranged on the outer wall of the first slider (5).

3. The piston ring forming grinding clamping device according to claim 1, characterized in that, The inner wall of the movable top block (4) is provided with several guide grooves (42) with openings facing the fixed top block (1), and each guide groove (42) is connected to the corresponding slot (41).

4. The piston ring forming grinding clamping device according to claim 1, characterized in that, The drive assembly includes a turntable (10), a handle (11), and a gear ring (12). A slide rod (9) is coaxially mounted on the turntable (10). The end of the slide rod (9) away from the turntable (10) is inserted into the lead screw (8) and slides along its axial direction. The handle (11) is mounted on the turntable (10) off the axis of the turntable (10). The gear ring (12) is connected to the end of the turntable (10) near the lead screw (8). A toothed groove (304) is provided at the end of the spindle (3) away from the fixed top block (1). The gear ring (12) slides into the toothed groove (304) and meshes with it.

5. The piston ring forming grinding clamping device according to claim 4, characterized in that, A slide groove (801) is provided on the lead screw (8), and a second slider (14) is provided in the slide groove (801). The slide rod (9) is inserted into the slide groove (801) and connected to the second slider (14).

6. The piston ring forming grinding clamping device according to claim 5, characterized in that, It also includes a beetle bouncer (15), which includes a ball (151) and a spring self-locking device (152). A second tensioning component (13) is provided in the slide (801). The second slider (14) is connected to the movable end of the second tensioning component (13). The ball (151) is connected to the end of the second slider (14) away from the slide bar (9). The spring self-locking device (152) is connected to the bottom surface of the slide (801). In the unlocked state, the second tensioning component (13) pushes the second slider (14) and causes the toothed ring (12) to disengage from the toothed groove (304).

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