Numerical control lathe positioning tool for long and thin rod hexagonal head bolt

Abstract

The utility model discloses a numerical control lathe positioning tool for a long and thin rod hexagonal head bolt, which comprises a sleeve (1), a hexagonal groove (2) and an arc hole (3). The hexagonal groove (2) is arranged on the sleeve (1), and the circular arc holes (3) are respectively arranged on the hexagon of the hexagonal groove (2). The utility model discloses a positioning method of a numerical control lathe positioning tool for a long and thin rod hexagonal head bolt. Comprising the following steps; and designing a positioning mark, clamping, setting a tool and processing. The tool is small in clamping size deviation, stable in clamping, high in product size precision and high in degree of symmetry, and hexagonal sharp corners cannot be collided and damaged during clamping.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling, and in particular relates to a positioning tooling for a numerically controlled lathe of a slender rod hexagonal head bolt. Background Art

[0002] Slender hexagonal bolt parts with waist grooves are used in special aviation field assembly. During the processing, the parts are long and have long waist grooves. CNC lathes are required for top processing. Therefore, in order to ensure the coaxiality requirements and processing accuracy of the product, the head clamping needs to be strictly controlled. The existing technology is to clamp through the chuck of the CNC lathe, which leads to large clamping size deviation or unstable clamping, low symmetry, and the processing process cannot meet the product size accuracy requirements. And the hexagonal sharp corners are easy to be bumped and damaged during clamping. Summary of the invention

[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a CNC lathe positioning tool for a slender rod hexagonal head bolt with small clamping size deviation, stable clamping, high product size accuracy, high symmetry, and the hexagonal sharp corners will not be bumped and damaged during clamping.

[0004] The utility model discloses a CNC lathe positioning tool for a slender rod hexagonal head bolt, comprising a sleeve, a hexagonal groove and an arc hole, and is characterized in that the sleeve is provided with the hexagonal groove, and the hexagonal corners of the hexagonal groove are respectively provided with arc holes.

[0005] A breathable groove is arranged at the center of the hexagonal groove.

[0006] A positioning reference point is arranged on the edge of one of the arc holes.

[0007] Compared with the prior art, the utility model has obvious beneficial effects; it can be seen from the above technical scheme that: a hexagonal groove is provided on the sleeve, arc holes are provided on the hexagons of the hexagonal groove, a breathable groove is provided in the center of the hexagonal groove, and a positioning reference point is provided on the edge of one of the arc holes. The tooling is processed by a machining center to ensure that the symmetry between the inner hexagonal groove of the tooling and the outer circle of the tooling is within 0.04mm. Since the end face of the head of the product to be processed has been processed and can be used as a positioning reference, the end face positioning is adopted. When the hexagonal is processed in the machining center, the bottom surface is processed and formed at one time, which is conducive to the use of the bolt head for positioning processing. And a breathable groove is added to prevent the parts from being clamped and locked. In addition, an arc area is added. Since the product relies on the hexagonal head for positioning processing and the top turning method to process the polished rod and waist groove, there is a tolerance in the hexagonal part of the product, and the hexagonal head has a sharp appearance. In order to avoid hexagonal size interference and avoid the hexagonal sharp corners to prevent bumps and scratches, an arc hole is manufactured at each hexagonal sharp corner position of the tooling. This design is convenient for product clamping and prevents hexagonal edges from being bumped and damaged. Finally, design positioning marks. During the tool setting and clamping process of CNC lathe machining, the equipment spindle has a certain position and the clamping can has a positioning point, so the positioning reference point is designed on the clamping fixture. When setting the tool, the equipment spindle reference point corresponds to the retaining spring positioning point. When clamping, the fixture positioning reference point corresponds to the retaining spring positioning point. The three points correspond when processing the product to ensure that the product is at the same positioning point each time it is clamped and processed, which helps to improve the product processing accuracy and ensure product consistency. The clamping size deviation is small, the clamping is stable, the product size accuracy is high, the symmetry is high, and the hexagonal sharp corners will not be bumped and damaged during clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a top view of the utility model;

[0009] Figure 2 It is a structural schematic diagram of the utility model.

[0010] Marking in the figure

[0011] 1. Sleeve; 2. Hexagonal groove; 3. Arc hole; 4. Breathable groove; 5. Positioning reference point. DETAILED DESCRIPTION

[0012] The specific implementation methods, structures, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0013] The utility model is a CNC lathe positioning tool for a slender rod hexagonal head bolt, comprising a sleeve 1, a hexagonal groove 2, an arc hole 3, a breathable groove 4, and a positioning reference point 5, and is characterized in that: the sleeve 1 is provided with a hexagonal groove 2, the hexagonal corners of the hexagonal groove 2 are respectively provided with arc holes 3, the center of the hexagonal groove 2 is provided with a breathable groove 4, and a positioning reference point 5 is provided on the side of one of the arc holes 3.

[0014] When in use; according to the positioning point of the CNC lathe spindle and the positioning point of the clamping can, a positioning reference point 5 is set on the side of the corresponding arc hole 3 of the sleeve 1, and the head of the slender hexagonal head bolt is placed in the corresponding hexagonal groove 2 of the sleeve 1, and the end face of the hexagonal head bolt is fitted with the bottom of the hexagonal groove 2. When aligning the tool, the CNC lathe spindle reference point is aligned with the retaining spring positioning point. When clamping, the positioning reference point 5 is aligned with the retaining spring positioning point. The three points are aligned, and then the top turning operation is performed. After the turning operation is completed, the product can be directly removed from the tooling. Each time the hexagonal head bolt is processed, ensure that the hexagonal head bolt is at the same positioning reference point 5 during each clamping and processing process.

[0015] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A CNC lathe positioning tool for a slender hexagonal head bolt, comprising a sleeve (1), a hexagonal groove (2), and an arc hole (3), characterized in that; A hexagonal groove (2) is provided on the sleeve (1), and arc holes (3) are respectively provided on the hexagonal corners of the hexagonal groove (2).

2. A CNC lathe positioning tool for a slender hexagonal head bolt as claimed in claim 1, characterized in that; A breathable groove (4) is provided at the center of the hexagonal groove (2).

3. A CNC lathe positioning tool for a slender hexagonal head bolt as claimed in claim 1, characterized in that; A positioning reference point (5) is provided on the side of one of the circular arc holes (3).

Images