A Fixture Structure for Machining Spiral Groove

Abstract

The invention relates to a clamp structure for machining a spiral groove. The clamp structure is characterized by comprising a bottom plate, a first tip mechanism and a clamp mechanism are respectively in sliding connection with the bottom plate, and a second tip mechanism is arranged in the clamp mechanism; a central hole in one end of a plunger and a cover cap at the other end of the plunger are clamped by a female tip and a male tip respectively, circle centers of the two ends of the plunger can be located, and a locating basis is made to be consistent with an involved basis. An adjustable positioning mechanism is adopted, a positioning block is attached to the flat face of the plunger, meanwhile, the adjustable positioning mechanism is arranged on a main shaft and does 360-degree barrier-free rotation, the positioning block exerts force on the flat face of the plunger in the process of rotating along with the main shaft, the plunger is driven to rotate between the female tip and the male tip through the force action, the relative rotation of the plunger can be adjusted in the axial direction through the female tip and the male tip, and therefore adjustability of the rotation direction and the machining angle can be achieved.

Description

technical field [0001] The invention relates to a fixture structure, in particular to a fixture structure for processing spiral grooves. Background technique [0002] As an important part of the engine, the plunger is used to perform piston-like reciprocating motion when the engine is doing work. It has the characteristics of easy wear, so its demand is relatively large. At present, the existing processing fixtures for processing the spiral groove of the plunger are as follows: figure 1 As shown, it includes a bottom plate 107, on which a pressing plate 104 and a mounting block 105 are installed, the adjusting screw 105 passes through the mounting block 105, and a "V" shaped block for embedding the plunger is also installed on the bottom plate 107 103, on the front portion of the "V" shaped block 103, a positioning block 101 is also installed on the bottom plate 107. [0003] The processing process of the fixture is first to install the plunger in the "V" shaped block 103, ...

AI Technical Summary

Problems solved by technology

[0004] (1) The above-mentioned "V" block 103 is used for positioning the outer circle of the plunger's working part, and its positioning method is inconsistent with the positioning of the axis center when the plunger is designed. depth error

[0005] (2) When the plunger is pressed by the pressure plate 104, it is easy to cause the axial displacement of the plunger, thereby affecting the dimensional accuracy, and when there are burrs on the pressure plate 104 or iron filings are contained in the grinding surface, it is easy to scratch the working surface of the plunger parts , resulting in workpiece scrapping

[0006] (3) Since the plunger needs to process two corresponding spiral grooves, it needs to be clamped twice, which is easy to cause workpiece size deviation

[0007] (4) The positioning block 101 and the flat surface 102 of the plunger cannot be adjusted

[0008] (5) The fixture structure is only limited to the plunger processing of the spiral groove. Since the types of oil control grooves of the plunger parts are varied, it is necessary to design a variety of fixtures, which results in high design and manufacturing costs and large space occupation.

Images