Annular sticky wool top supporting mechanism applied to sandblasting of inner wall of slender pipe hole

Abstract

The invention discloses an annular sticky wool top supporting mechanism suitable for sand blasting of the inner wall of a slender pipe hole with the hole diameter close to the outer diameter of a sand blasting head. The sand blasting head supporting mechanism solves the problem that a suitable sand blasting head supporting mechanism does not exist when sand blasting is carried out on the inner wall of a small pipe hole.

Description

[0001] field:

[0002] The support mechanism that keeps the nozzle centered and rotates and moves freely during inner wall sandblasting is an indispensable auxiliary mechanism to maintain the smooth progress of sandblasting operation and ensure the quality of sandblasting. When dealing with slender tube holes with a hole diameter close to the diameter of the sandblasting head rod, it is necessary to propose a soft support mechanism that occupies a smaller radial dimension, that is, a ring-bonded wool strip support mechanism. This is because the support mechanism of the existing technology is difficult to install under such a small size condition. This technology belongs to the field of sandblasting technology and is applied to surface engineering. Background technology:

[0003] There are more and more demands and requirements for surface preparation such as removing paint and rust from the workpiece and achieving the set roughness value by using sandblasting technology before painting and spraying the inner wall of the workpiece tube hole and making a lining. However, the existing sandblasting technology is still difficult to implement high-quality sandblasting treatment for the inner wall of the slender tube hole of the workpiece, especially for the inner wall of the slender tube hole of the workpiece with an aperture close to the outer diameter of the sandblasting head. The difficulty is reflected on the one hand in the miniaturization of the sandblasting head used for sandblasting the inner wall of the slender tube hole, and on the other hand in the miniaturization of the sandblasting head support mechanism. The small rod diameter sandblasting head realizes the miniaturization of the sandblasting head, and the small rod diameter sandblasting head is composed of a lateral sandblasting nozzle made of wear-resistant material and a long sand transport pipe of the same rod diameter. During the inner wall sandblasting process, the small rod diameter sandblasting head must be guaranteed to rotate and move freely in the center of the workpiece tube hole, which requires providing a support mechanism for the sandblasting head to achieve free rotation and movement in the center. The support mechanism of the prior art includes a support mechanism with adjustable radial size and an annular brush support mechanism with a gap rotating pair. Among them, the radially adjustable support mechanism relies on the threaded pair to adjust the opening size of the caster, so the mechanical mechanism itself occupies a large radial dimension and is only suitable for workpieces with larger hole diameters; the annular brush support mechanism of the gap rotation pair occupies a relatively small radial dimension and is suitable for smaller workpieces. However, several existing support mechanisms are difficult to apply to slender workpieces with holes close to the outer diameter of the small-diameter sandblasting head. Summary of the invention:

[0004] The invention provides a ring-bonded wool strip support mechanism, which aims to assist the small-diameter sandblasting head in implementing high-quality sandblasting processing by using the support mechanism when sandblasting the inner wall of a slender tube hole of a workpiece whose hole diameter is close to the outer diameter of the small-diameter sandblasting head.

[0005] The ring-bonded wool strip support mechanism used by the auxiliary small-diameter sandblasting head to implement sandblasting on the inner wall of the slender tube hole of the workpiece whose aperture is close to the outer diameter of the small-diameter sandblasting head is characterized in that: the ring-bonded wool strip support mechanism is formed by gluing the wool strip around the outer wall of the long sand conveying pipe of the small-diameter sandblasting head; the small-diameter sandblasting head is composed of a wear-resistant material sandblasting nozzle with a lateral spray hole and a long sand conveying pipe bonded and fixed thereto or threadedly connected thereto; the wool strip is a composite strip with fiber soft hair densely bonded on one side of a thin flexible strip; the smooth surface of the composite strip is bonded to the long sand conveying pipe The outer wall of the sand tube is glued and fixed around to form an annular fiber soft hair layer surrounding the small-diameter sandblasting head with the fiber soft hair facing outward; the fiber soft hair layer contacts the inner wall of the workpiece tube hole to provide central support for the small-diameter sandblasting nozzle; the fiber soft hair layer contacts the wall to form a low-resistance friction pair, which can meet the needs of free rotation and movement of the small-diameter sandblasting head; because the thickness of the fiber soft hair strip after compression is very small, sandblasting with a small-diameter sandblasting head using a ring-bonded hair strip support mechanism can be applied to fine tube holes in workpieces that are close to the rod diameter of the small-diameter sandblasting head.

[0006] Beneficial effects:

[0007] The ring-bonded wool strip support mechanism solves the problem of sandblasting the slender tube hole of the workpiece whose hole diameter is close to the outer diameter of the sandblasting head. Under the support of the ring-bonded wool strip support mechanism, the sandblasting nozzle can rotate and move freely in the center of the workpiece tube hole, avoiding the sandblasting nozzle from moving in contact with the workpiece wall surface and scratching the workpiece tube hole wall surface. Other beneficial effects include simple structure and installation process of the support mechanism, easy acquisition of raw materials, low processing cost, convenient use, easy maintenance and update, etc. Description of the drawings:

[0008] Ring-bonded wool strip support mechanism Figure 1 As shown in the figure:

[0009] 1——Pipe hole workpiece with a hole diameter close to the outer diameter of the sandblasting head

[0010] 2——Small rod diameter sandblasting nozzle for wear-resistant materials with lateral spray holes

[0011] 3——Ring-bonded wool strip support mechanism

[0012] 4——Long sand delivery pipe fixedly connected to the small diameter sandblasting nozzle

[0013] The annular bonded wool strip support mechanism 3 used by the auxiliary small-diameter sandblasting head to implement sandblasting on the inner wall of the slender tube hole 1 of the workpiece whose aperture is close to the outer diameter of the small-diameter sandblasting head is characterized in that: the annular bonded wool strip support mechanism 3 is formed by gluing the wool strip around the outer wall of the long sand conveying pipe 4 of the small-diameter sandblasting head; the small-diameter sandblasting head is composed of a wear-resistant material sandblasting nozzle 2 with lateral spray holes and a long sand conveying pipe 4 bonded and fixed thereto or threadedly connected; the wool strip is a composite strip with fiber soft hair densely planted and bonded on one side of a thin flexible strip; the composite strip is light The surface is glued and fixed to the outer wall of the long sand conveying pipe 4 to form an annular fiber soft wool layer surrounding the small rod diameter sandblasting head with the fiber soft wool facing outward; the fiber soft wool layer contacts the inner wall of the workpiece tube hole 1 to provide central support for the small rod diameter sandblasting nozzle 2; the fiber soft wool layer contacts the wall surface to form a low resistance friction pair, which can meet the needs of free rotation and movement of the small rod diameter sandblasting head; because the thickness of the fiber soft wool strip after compression is very small, the use of the annular glued wool strip support mechanism 3 and the use of a small rod diameter sandblasting head for sandblasting can be suitable for workpiece fine tube holes that are close to the diameter of the sandblasting head.

Claims

1. A ring-bonded wool strip support mechanism 3 used by an auxiliary small-rod-diameter sandblasting head to sandblast the inner wall of a slender tube hole 1 of a workpiece whose hole diameter is close to the outer diameter of the small-rod-diameter sandblasting head, characterized in that: The annular bonded wool strip support mechanism 3 is formed by gluing wool strips around the outer wall of the long sand conveying pipe 4 of the small-diameter sandblasting head; the small-diameter sandblasting head is composed of a wear-resistant material sandblasting nozzle 2 with lateral spray holes and a long sand conveying pipe 4 bonded and fixed thereto or threadedly connected thereto; the wool strip is a composite strip with fiber soft hair densely planted and bonded on one side of a thin flexible strip; the smooth surface of the composite strip is glued and fixed to the outer wall of the long sand conveying pipe 4 around, forming an annular fiber soft hair layer surrounding the small-diameter sandblasting head with the fiber soft hair facing outward.

Images