U-shaped concave positioning groove piston ring machining device

Abstract

The utility model discloses a U-shaped concave positioning groove piston ring processing device, which comprises a clamp base, a U-shaped concave positioning groove, a U-shaped concave positioning groove, a U-shaped concave positioning groove and a U-shaped concave positioning groove, a core shaft is fixed to one side of the moving direction of the clamp base, and the piston rings are provided with upward openings, are aligned and are sequentially arranged on the core shaft in a sleeving mode. And the milling cutter is vertically clamped on a chuck of a milling machine, corresponds to the axial opening position of the piston ring, and is used for milling the piston ring in batches along with the movement of the clamp base. According to the utility model, a one-time feed milling forming processing mode is adopted, so that the processing efficiency is obviously improved compared with a slot radial multi-time feed processing mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to piston ring technical field especially is a kind of U-shaped concave positioning slot piston ring processing device. BACKGROUND

[0002] For two-stroke engine piston ring, to prevent the breakage caused by piston ring rotation during operation, the opening shape of the ring is usually designed into two forms of inner circle U-shaped positioning and end face R-shaped positioning.

[0003] For the U-shaped groove machining of inner circle U-shaped positioning ring, wire cutting or slotting machine is used to complete machining, first, a group of piston rings are loaded into a barrel-shaped tool with opening direction consistent, then the barrel-shaped tool is fixed on the equipment clamping jaw, slotting machining is started, after machining, the barrel-shaped tool is disassembled, and then the ring is disassembled from the barrel-shaped tool, the whole clamping and disassembling process is complicated, and with the popularization of this piston ring structure design, the machining method has been difficult to meet the development needs of enterprises. SUMMARY

[0004] The utility model aims at overcoming the shortage of background art, and the utility model discloses a kind of U-shaped concave positioning slot piston ring processing device.

[0005] Technical scheme: the U-shaped concave positioning slot piston ring processing device disclosed by the utility model, it include: fixture base, the fixture base is fixed on the moving worktable of milling machine;The side of the moving direction of the fixture base is fixed with mandrel, piston ring opening is upwards and is aligned, and is successively sleeved on mandrel;

[0006] Milling cutter is vertically clamped on the elastic chuck of milling machine, corresponding the axial opening position of piston ring, with the movement of fixture base, batch milling is carried out on piston ring.

[0007] Further, the mandrel includes fixed shaft portion and sleeved shaft portion, the fixed shaft portion and the sleeved shaft portion form a stepped structure, after the piston ring is sleeved on the sleeved shaft portion, the inner side axial end portion is abutted on the fixed shaft portion.

[0008] Further, the mandrel is provided with a threaded hole penetrating in the axial direction, and the outer end portion of the mandrel is provided with a pressing plate, which is axially pressed on the outer end of the piston ring by a screw and the mandrel.

[0009] Further, the fixed shaft portion is provided with a positioning pin groove corresponding to the opening position of the piston ring, and a positioning pin which can be inserted and pulled out and extends to the sleeved shaft portion, and the piston ring is positioned and sleeved on the sleeved shaft portion by the positioning pin.

[0010] Further, the milling cutter is a multi-blade milling cutter, which includes a cutter arm extending from the opening of the piston ring and a cutter blade with a shape consistent with the outer contour and the inner groove of the piston ring.

[0011] Beneficial effects: Compared with the existing technology, the advantages of the utility model are: the milling forming processing method with one feed is adopted, and the processing efficiency is significantly improved compared with the processing method of multiple radial feeds of the slot; the inner circle positioning method of the piston ring is adopted in the free state, and the piston ring is freely mounted on the core shaft, which is significantly more efficient than the original shrinking into the barrel; the multi-edge milling cutter is used for processing, and the surface processing roughness is significantly higher than the original slotting machine processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a side sectional view of the utility model;

[0013] Figure 2 This is an axial cross-sectional view of the utility model;

[0014] Figure 3 This is the processing principle diagram of this utility model. DETAILED DESCRIPTION

[0015] like Figure 1 and 2 The U-shaped concave positioning groove piston ring processing device shown in the figure includes: a fixture base 1, which is fixed to the movable workbench of the milling machine; a core shaft 2 is fixed to one side of the fixture base 1 in the moving direction, and the piston ring 3 is aligned with its opening facing upward and is sequentially mounted on the core shaft 2;

[0016] The milling cutter 4 is vertically clamped on the chuck of the milling machine, corresponding to the axial opening position of the piston ring 3, and the piston ring 3 is milled in batches as the fixture base 1 moves.

[0017] The core shaft 2 includes a fixed shaft portion 201 and a sleeve shaft portion 202 . The fixed shaft portion 201 and the sleeve shaft portion 202 form a stepped structure. After the piston ring 3 is sleeved on the sleeve shaft portion 202 , the inner axial end portion abuts against the fixed shaft portion 201 .

[0018] The core shaft 2 is provided with an axially penetrating screw hole 203 , and the outer end of the core shaft 2 is provided with a pressure plate 5 , which is fixed to the core shaft 2 by screws 501 and axially pressed on the outer end of the piston ring 3 .

[0019] The fixed shaft portion 201 is provided with a positioning pin groove 204 corresponding to the opening position of the piston ring 3 and is provided with a pluggable positioning pin extending toward the sleeve shaft portion 202. The piston ring 3 is sleeved on the sleeve shaft portion 202 by aligning the orientation of the positioning pin opening.

[0020] The milling cutter 4 is a multi-edge milling cutter, comprising a cutter arm 401 extending from the opening of the piston ring 3 and a cutting edge 402 whose working outer contour is consistent with the shape of the inner groove.

[0021] Tooling design: Based on the existing vertical milling machine, design appropriate tooling connection devices and ensure tooling installation accuracy.

[0022] During operation, the piston ring 3 is positioned by the core shaft 2 and the open positioning pin under the condition of free state. After being pressed by the pressure plate 5, the open positioning pin is pulled out. The axial movement of the piston ring 3 is achieved by shaking the hand wheel of the machine tool and moving the milling machine table. The inner circle U-shaped groove is formed under the milling action of the 4 rotations of the milling cutter. The processing principle is as follows Figure 3 shown.

Claims

1. A U-shaped concave positioning groove piston ring processing device, characterized in that: include: A fixture base (1), the fixture base (1) is fixed on a movable workbench of a milling machine; a core shaft (2) is fixed on one side of the fixture base (1) in a moving direction, and the piston rings (3) are positioned with their openings facing upward and aligned, and are sequentially mounted on the core shaft (2); The milling cutter (4) is vertically clamped on the chuck of the milling machine, corresponding to the axial opening position of the piston ring (3), and the piston ring (3) is milled in batches as the fixture base (1) moves.

2. The U-shaped concave positioning groove piston ring processing device according to claim 1, characterized in that: The core shaft (2) comprises a fixed shaft portion (201) and a sleeve shaft portion (202), wherein the fixed shaft portion (201) and the sleeve shaft portion (202) form a stepped structure, and after the piston ring (3) is sleeved on the sleeve shaft portion (202), the inner axial end portion abuts against the fixed shaft portion (201).

3. The U-shaped recessed positioning groove piston ring processing device according to claim 2, characterized in that: An axially penetrating screw hole (203) is provided in the core shaft (2), and a pressure plate (5) is provided at the outer end of the core shaft (2), which is fixed to the core shaft (2) by screws (501) and axially pressed against the outer end of the piston ring (3).

4. The U-shaped concave positioning groove piston ring processing device according to claim 2, characterized in that: The fixed shaft portion (201) is provided with a positioning pin groove (204) corresponding to the opening position of the piston ring (3), and is provided with a pluggable positioning pin extending toward the sleeve shaft portion (202). The piston ring (3) is sleeved on the sleeve shaft portion (202) by aligning the positioning pin opening in a consistent direction.

5. The U-shaped concave positioning groove piston ring processing device according to claim 1, characterized in that: The milling cutter (4) is a multi-edge milling cutter, comprising a cutter arm (401) extending from the opening of the piston ring (3) and a cutting edge (402) whose working outer contour is consistent with the shape of the inner groove.

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