KR200335553Y1 - Finishing Tool for end of pipes - Google Patents

Abstract

The present invention relates to a finishing cutting tool at an end of a tubular material, and more particularly to a structure of a finishing tool for processing an end surface and an inner chamfer of a tubular material.

A feature of the present invention is a first blade plate with a cutter for processing the end surface of the tubular material, a second blade plate with a cutter for processing the inner chamfer adjacent to the end surface, and the first blade plate is fitted A cylindrical blade having a slotted blade sheet and a chip pocket, wherein the blade sheet is formed with a groove formed in the cylindrical front end portion which is divided so that the second blade plate can be secured. A body portion and a shank protruding from the body portion, when the cutter of the first blade plate processes the end surface of the tubular material, at the same time the cutter of the second blade plate is inside the tubular material. The first block on the blade sheet formed in the divided cylindrical body front end to process a chamfer; And placing the second blade plate on the blade sheet formed in the divided conical body front end portion.

Description

Finishing tool for end of pipes

The present invention relates to a finishing cutting tool at an end of a tubular material, and more particularly to a structure of a finishing tool for processing an end surface and an inner chamfer of a tubular material.

In general, when cutting the cross section of the material, the machined surface and its adjacent edges must be finished as they will injure the person handling the product and further damage the associated equipment.

Conventionally, the process of finishing the end surface and round chamfering (hereinafter referred to as "rounding") of the edge, side or inner surface of the material or chamfering (hereinafter "chamfering") Chamfering process ”was carried out in a separate process using a separate tool. As shown in FIG. 5, the process of drilling the central portion of the cylindrical material to form a tubular material and then cutting or finishing the end surface of the tubular material and then manufacturing the inner chamfer separately.

Therefore, the problem that the entire process is delayed inevitably occurs by performing two operations step by step using each of the tools. In particular, when processing materials using a transfer machine composed of a number of processes due to overheating competition among companies manufacturing and supplying general-purpose parts, it was necessary to integrate several processes into one to maximize the product yield per unit time.

Furthermore, there is a need for a tool having an improved structure to avoid interference between materials, tools, and tools that may occur when combining multiple processes into one.

The present invention aims to solve the above problems, and provides a tool in which two standard tips are disposed to simultaneously process the tubular end surface and the inner chamfer simultaneously, without interference between the tips, and easy to discharge the cutting chip. It is also intended to use a blade plate and to place a blade plate so that interference with the inner surface of the material or flank wear does not occur.

Figure 1 is a schematic diagram showing the production of the end surface and the inner chamfer of the material at the same time using the combined finishing cutting tool.

Figure 2 is a schematic view showing the plane and front and side of the finishing cutting tool according to an embodiment of the present invention.

3 is a front view showing the tool arrangement shape of FIG. 1 to avoid interference between the workpiece and the tool blade or flank;

4 is an assembly view of the finishing cutting tool of FIG.

5 is a schematic view showing a conventional machining process.

<Explanation of symbols for the main parts of the drawings>

10 finish cutting tool 20 first blade plate

30: second blade plate

The present invention for achieving the above technical problem is an end-finish cutting tool having two blade plates each having at least one cutter and fixed to a tool, for machining the end surface 51 of the tubular material. A first blade plate 30 with a cutter 32, a second blade plate 20 with a cutter 22 for processing the inner chamfer 52 adjacent the end surface 51, and the first blade A blade sheet 17a having a groove formed in the cylindrical shear portion 17 partitioned to fix the plate 30, and a conical shear portion 16 partitioned to fix the second blade plate 20. Cylindrical body portion 15 having chip pockets 18 and 19 having grooves formed in the longitudinal direction to receive and discharge the blade sheet 16a and grooved chips formed therein without difficulty. ) And from the body portion 15 A protruding shank 11, and when the cutter 32 of the first blade plate 30 processes the end surface 51 of the tubular material, the second blade plate 20 at the same time. Placing the first blade plate 30 on the blade sheet 17a formed in the divided cylindrical body front end portion 17 so that the cutter 22 of the tubular material can process the inner chamfer 52 of the tubular material. The second blade plate 20 is disposed on the blade sheet 16a formed at the divided conical body front end 16. Further, the first blade plate 30 and the second blade plate ( 20 is disposed so as to lie oppositely in the radial direction of the body portion 15, and the second blade plate 20 is negative so as to avoid interference with the material 50 and evenly contact the cutter 22 along the cross section. Front tilt angle of and Side inclination angle (β) of the can is characterized in that the formation.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail.

Fig. 1 is a schematic showing the simultaneous manufacture of the end surface of the material and the inner chamfer using a combined finishing cutting tool; a tool 10 with two blade plates 20,30 and a material with tubular ends. End surface 51 and inner chamfer 52 of 50 are shown in the cross-section shown.

In order to simultaneously process the end surface 51 and the inner chamfer 52 of the tubular material 50, the tool 10 and the material 50 are rotated relative to each other. In this process, either the tool 10 or the workpiece 50 may be fixed. Moreover, the tool 10 and the workpiece 50 move towards each other over a distance until the end surface 51 and the inner chamfer 52 of the workpiece are completely manufactured and / or machined. To this end, the workpiece 50 is fixed and the tool 10 can be advanced towards the workpiece 50. As soon as the end surface 51 and the inner chamber 52 are fully machined, the forward motion can be stopped and the tool 10 can be separated from the workpiece 50 in the opposite direction to the forward direction.

For ease of explanation, reference numerals to the same parts used in FIG. 1 are used the same throughout the other drawings.

2 is a schematic view showing a plane, a front and a side of a finishing cutting tool according to an embodiment of the present invention, Figure 3 is a front view showing the tool arrangement shape of Figure 1 to avoid interference between the workpiece and the tool blade or flank to be.

As shown in the embodiment of the present invention, the tool body 15 divided by the grooves 18 and 19 called chip pockets formed in the longitudinal direction of the cylindrical tool body portion 15 is formed. At the front ends 16, 17, two blade plates 20, 30 are fixed. The first blade plate 30 for processing the end surface 51 is fitted into and fixed to the blade sheet 17a formed by entering the side surface of the divided cylindrical shear 17 of the tool body 15, and radially opposite thereto. The second blade plate 20 for processing the inner chamfer 52 is inserted into the side of the divided conical shear 16 of the tool body 15 is fitted and fixed to the blade sheet (16a) formed. The radial position of the tool body portion 15 of each blade plate 20, 30 is set to a radius to produce the end surface and the inner chamfer, respectively.

At this time, the second blade plate 20 is mounted inclined downward in the axial direction so as not to interfere with the inner surface of the material, and mounted inclined upward in the radial direction. The inclination angle in the axial direction is referred to as the front inclination angle α, and the inclination angle in the radial direction is referred to as the side inclination angle β, and the front inclination angle α is preferably about -6 ° as a negative value. Is a positive value. For example, when the inner diameter Φ of the material is about 13 mm or less, it is preferably about + 15 °.

4 is an assembly view of the finishing cutting tool of FIG. The first blade plate 30 is fixed directly to the blade sheet 17a formed in the chip pocket 18 of the body portion 15 of the tool 10, and the second blade plate 20 is the body of the tool 10. The parts 15 are connected by clamping claws or by screwing or soldering or in other suitable ways to be fixed directly to the blade sheet 16a formed in the chip pocket 19. In the present embodiment, the bolts 21 and 31 are coupled to each other. However, for example, if the diameter of the tube is smaller than 6 mm, the cutters 22 and 32 may be made together with the tool 10. In this case, there is an advantage that it is possible to omit the blade plate (20, 30) and a separate means for fixing them.

Finally, blade plates 20 and 30 can be designed to any desired polygonal shape.

In addition, the present invention is not limited to the above-described embodiment, and of course, it can be modified and implemented in various forms within the scope not departing from the basic idea of the present invention.

By using the finishing cutting tool according to the present invention as described above, the end surface and the inner chamfer of the tubular material can be simultaneously processed in a single operation, thus shortening the machining process to the final product.

Furthermore, the proper placement and inclination angle of the blade plate can prevent the interference between the material and the cutting tips and between the cutting tips, and the use of the universal cutting tips has the effect of low tool manufacturing cost.

Claims (3)

An end finishing cutting tool with two blade plates each having at least one cutter and fixed to the tool: A first blade plate 30 having a cutter 32 for processing the end surface 51 of the tubular material; A second blade plate (20) having a cutter (22) for processing the inner chamfer (52) adjacent said end surface (51); It includes a cylindrical body portion 15 on which the first blade plate 30 and the second blade plate 20 are mounted, and a shank 11 protruding from the cylindrical body portion 15. , The cylindrical body portion 15 includes a blade sheet 17a having a groove formed to allow the first blade plate 30 to be fixed to the divided cylindrical front end portion 17, and the first blade plate 30 of the first blade plate 30. Conical shear divided so that the cutter 22 of the second blade plate 20 can process the inner chamfer 52 of the tubular material as the cutter 32 processes the end surface 51 of the tubular material. Slotted blade sheet 16a to allow the second blade plate 20 to be fixed to 16, and a chip pocket having a groove formed in the longitudinal direction to receive and discharge the cutting chips without difficulty. Characterized by having chip pockets 18 and 19, Finishing cutting tool at the end of tubular material. The end of the tubular material end according to claim 1, characterized in that the first blade plate (30) and the second blade plate (20) are arranged so as to lie oppositely in the radial direction of the body portion (15). Cutting tools. The negative blade inclination angle α and the positive side slope angle β are set so that the second blade plate 20 avoids interference with the material 50 and evenly contacts the cutter 22 along the cross section. Finishing cutting tool at the end of the tubular material, characterized in that formed.