KR-102962328-B1 - Pipe multi cutting device

KR102962328B1KR 102962328 B1KR102962328 B1KR 102962328B1KR-102962328-B1

Abstract

The present invention relates to a pipe multi-cutting device, which enables a single pipe material to be simultaneously cut into multiple short pipes by means of a plurality of circular cutters that rotate in the opposite direction to the pipe material while the pipe material is clamped to the chuck of a lathe. The cutter assembly is configured such that a plurality of circular cutters are installed, the diameter of which decreases from the outer cutting position to the inner cutting position of the pipe material, thereby forming a fine height difference on a horizontal line. Accordingly, the cutting of the pipe material is performed sequentially from the outer side to the inner side, thereby enabling the stable simultaneous cutting of multiple short pipes and improving cutting efficiency.

Inventors

김성배

Assignees

상희정밀 주식회사

Dates

Publication Date: 20260513
Application Date: 20250220

Claims (3)

A chuck installed on a table to clamp a workpiece pipe to be cut in a horizontal direction; A chamfering tool holder and a cutter tool holder, respectively installed movably at the front and rear of a bed on one side facing the chuck and operated selectively; A chamfering tool assembly for cutting "∨" shaped chamfering grooves on the outer surface of a pipe base by mounting a plurality of chamfering tools spaced apart at intervals corresponding to the pipes to be cut on a holder portion horizontally installed on the chamfering tool holder; A cutter assembly for simultaneously cutting a pipe material into multiple single pipes by having a plurality of circular cutters of different diameters spaced apart at intervals corresponding to the length of the pipe to be cut, by means of a spacer having a cross-section H-shape with a recess formed on a rotating shaft that rotates in the opposite direction to the pipe material clamped to the chuck of a lathe and is horizontally mounted on the tool holder for the cutter; A pipe multi-cutting device characterized by the above-described circular cutter being arranged such that the diameter decreases as it goes from the outer cutting position to the inner cutting position of the pipe material, thereby forming a height difference that decreases from the outer to the inner side along a horizontal line, so that the cutting of the pipe material is performed sequentially from the outer side to the inner side.
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A pipe multi-cutting device according to claim 1, characterized in that a blocking bar is disposed in the recess of the spacer to prevent access to and push away the cut pipe.

Description

Pipe multi-cutting device The present invention relates to a pipe multi-cutting device capable of simultaneously cutting a single pipe material into multiple short pipes by means of a plurality of circular cutters that rotate in the opposite direction to the pipe material while rotating the pipe material clamped on a shelf. In particular, the invention relates to a technology capable of stably and simultaneously cutting multiple short pipes by using a plurality of circular cutters of different diameters to ensure that cutting is performed sequentially from the outside to the inside. Generally, pipes are widely used across various industrial sectors, with products of various diameters and lengths being commonly used. However, as demand patterns have recently shifted toward a variety of products in small quantities, it is common practice to cut standard-length pipes (usually around 6m) into appropriate lengths to suit specific product applications and market them. Therefore, pipe manufacturers and processing companies are required to have pipe cutters for cutting pipes. Typically, a bench lathe or CNC lathe is used to rotate the workpiece, i.e., the pipe, and to move the workpiece while bringing a cutting tool, such as a cutting tool, into contact with the rotating workpiece to machine and cut the outer and inner diameters. Such conventional pipe cutting devices process the material by rotating it to cut it into pieces of a predetermined length one by one, and then chamfering the edges of both ends of the cut pipes using a chamfering machine. Therefore, the conventional processing method of cutting standard-length pipes into specific lengths one by one is inefficient and involves a large number of cutting operations, while having very low productivity and high manufacturing costs due to increased labor costs. In addition, since the cutting process of such pipes relies solely on the rotational force of the lathe as a cutting tool while rotating the pipe to be cut with the pipe fixed in the chuck of the lathe, a heavy load is applied, which results in a slow cutting speed and inefficient cutting operation, and there is a drawback of rapid wear of the cutting tool. FIG. 1 is a plan view of a pipe multi-cutting device according to an embodiment of the present invention. FIG. 2 is a front view of a pipe multi-cutting device according to an embodiment of the present invention. Figure 3 is an exploded view of a circular cutter. FIG. 4 is a cross-sectional view of FIG. 3. Figure 5 is a cross-sectional view showing the difference in diameter of the rotary cutter. FIG. 6 is a cross-sectional view of a state in which a round cutter of a different diameter is cut while chamfered by a chamfering tool. FIG. 7 is an example of a pipe that has been chamfered and cut to a predetermined length. FIG. 8 is a partially enlarged cross-sectional view of a blocking bar that blocks the cut pipe from entering the circular cutter. FIG. 9 is a side view illustrating the operating state of the blocking bar. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings, focusing on the parts necessary to understand the operation and function according to the present invention. The embodiments described in this specification and the configurations illustrated in the drawings are merely one preferred embodiment of the present invention and do not represent all of the technical concepts of the present invention; therefore, it should be understood that various modifications capable of replacing them may exist at the time of filing this application. In describing the embodiments of the present invention, unnecessary technical details that are well known in the technical field to which the present invention belongs and are not directly related to the present invention are omitted to ensure clearer communication without obscuring the essence of the invention. FIG. 1 is a plan view of a pipe multi-cutting device according to an embodiment of the present invention, and FIG. 2 is a front view of a pipe multi-cutting device according to an embodiment of the present invention. Referring thereto, the pipe multi-cutting device of the present invention comprises: A chuck (30) of a lathe (20) installed on a table (10) for clamping a workpiece (P) to be cut in a horizontal direction; A chamfering tool holder (50) and a cutter tool holder (60) are respectively installed to be movable at the front and rear of a bed (40) on one side facing the chuck (30) and are selectively operated; A chamfering bit assembly (100) for cutting a “∨” shaped chamfering groove (53) on the outer surface of a pipe base material (P) by axially mounting a plurality of chamfering bits (52) spaced apart at intervals of the pipe to be cut on a holder part (51) horizontally installed on the above chamfering tool holder (50); A cutter assembly (200) for simultaneously cutting a pipe material (P) into multiple single pipes (P1, P2,