JPH04115534U - electroplated reamer tool - Google Patents

Abstract

(57) [Summary] [Purpose] This is to improve the machining efficiency of an electroplated reamer tool that adds cutting to a pre-drilled hole in a metal material to finish a hole of desired dimensions. [Structure] The cutting part for cutting the tip of the electroplated reamer tool was a gentle single arc shape in conventional products, but it is divided into multiple stages of cutting parts with different diameters, and one step from the tip. The diameter of each reamer tool increases little by little, creating a structure that resembles a single electrodeposited reamer tool with different diameters. [Effect] Since the machining allowance of the cut material per stage is reduced by multiple stages of cutting sections, chips are easily separated, and the first to third cutting sections are cut in a continuous arc shape. Cutting efficiency is much better than conventional products that cut only one part.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention involves cutting a pre-drilled hole in a metal material to create the desired hole diameter. This relates to an electrodeposited reamer tool used for lifting.

0002

[Conventional technology]

A pre-drilled hole in a metal material is machined to create a precise finish to the desired hole diameter. Conventionally, an electrodeposited reamer tool is used as a tool for reaming. This tool is As shown in Figure 8, which shows the front view, the surface of a tapered core made of tool steel, etc. , abrasive grains X (for example, artificial diamond or corundum, etc.) ) is electrically welded to multiple protrusions and then polished. The electrofusion welded abrasive grains of the protruding stripes are arranged at equal intervals around the core metal.

0003 In this way, the electrofusion abrasive grains The tip side of the cutting part is formed into a gentle arc shape as shown in Figure 8, and the electrodeposited lead A machine tool 1 is configured. This gentle arc-shaped part is the cutting part 2 and is the part to be cut. This is the part that cuts holes that are pre-drilled in cutting metal materials.

0004

[Problem that the idea aims to solve]

When cutting a pre-drilled hole in a metal material with an electroplated reamer tool, the The thickness of the metal machining allowance affects the degree of seizing of the cut part, and electroplated reaming It is known that the feed rate of the tool, that is, the machining efficiency, is also affected.

[0005] The reason for this will be explained with reference to FIGS. 5(A) and 5(B). Figures 5(A) and (B) are electroplated reamer tool 1. is a vertical cross-sectional view illustrating the process of cutting a hole in metal material 3, but in the case of (A) Let α be the hole diameter in case (B) and β be the hole diameter in case (B). If α>β, the machining allowance is large The thickness of the chip Z2 is thicker than the thickness of the chip Z1 when the machining allowance is small. metal If material 3 is steel, aluminum, etc., long chips will form if the thickness of the chips is 25 μm or more. The chips are generated between the abrasive grains (chip point) forming the cutting part 2 of the electrodeposited reamer tool 1. It accumulates in the abrasive grains without being discharged out of the hole, causing the abrasive grains to fall off, and causing electricity to build up. This will reduce the feed speed of the reamer tool 1. In this way, the larger the machining allowance, the As the feed speed of the electroplated reamer tool 1 becomes slower, chips become stuck between the abrasive grains. Cutting is difficult because it leads to a decrease in machining efficiency and chips are easily separated and ejected. Machining efficiency is reduced to about 1/7 of that of easy cast iron machining.

[0006] To solve the above-mentioned problems, reducing the machining allowance will make the chips thinner and more likely to break up. Electrodeposition ribbons with different diameters may be used depending on the size of the hole in the metal material. You can select and use tool 1, but it can also be applied to slightly larger or smaller hole diameters in metal materials. Needless to say, it would be more desirable if there was an electrodeposition reamer tool 1 that could do this. This invention eliminates problems such as seizure by adding a small machining allowance during one cutting process. The purpose is to provide an electroplated reamer tool that can obtain a large machining allowance without causing holes. ing.

[0007]

[Means to solve the problem]

Even for metal materials such as steel and aluminum, machining efficiency can be increased by reducing the machining allowance. It is possible to This is because when the machining allowance is reduced, the chips become thinner and more likely to break up. It is for the sake of becoming. Cutting is performed on metal materials to break up long chips. The cutting part is made up of multiple steps with successively larger diameters, reducing the machining allowance at each step. It is best to keep the scraps thin. This invention is a cutting part 2 of an electroplated reamer tool 1. This creates multiple stages of cutting parts with different diameters, making it possible to combine electroplated reamer tools with different diameters into one tool. I created a structure that seems concrete.

[0008] Therefore, the electroplated reamer tool of the present invention has a truncated bullet-shaped tip with a gently curved surface. The surface of the core metal formed on the tapered part, including the tapered part on the tip side of the core metal, in the axial direction of the core metal. A plurality of protrusions are arranged along the line, and abrasive grains are electrodeposited on the outer peripheral surface of these protrusions to perform cutting. At the same time as forming a cutting part, at least one step is formed in each of these cutting parts. By providing a section, the across diameter of multiple cutting sections can be adjusted from the tip side of the core metal. It is characterized by a structure that increases in size.

[0009] In other words, the step part in the cutting part makes it easier to use the electrodeposited reamer tool. The first stage cutting part on the tip side is first machined with a small machining allowance, and then the second stage The cutting part is cut with the same machining allowance with a slightly larger diameter, and the third stage of cutting is performed. The cutting process is performed using the same machining allowance with a slightly larger diameter. Do it like this As a result, the machining allowance removed at each step of the cutting process becomes thinner. ing. Further, each stepped portion of the same step provided in the cutting portion of the plurality of protrusions is , it is a preferred embodiment that the metal core is provided on a plane perpendicular to the axis of the metal core. It is. Furthermore, each stepped portion provided in the cut portion of the plurality of protrusions is formed on the core metal. It is also possible to arrange them at various positions in a spiral shape with respect to the axis.

0010

[Effect]

By providing a step part in the cutting part in this way, a multi-step cutting part is formed. As a result, holes in metal materials are not cut with large machining allowances at once, but with small holes. As the cutting allowance is divided into multiple stages and removed, the chips are easily separated and can be easily discharged. Therefore, no burning occurs in the cut part. Also, depending on the cutting part for each step. Since the machining allowance is small, the feed speed of the electroplated reamer tool 1 is fast, and in addition, only one electroplated reamer can be used. The hole diameter can be finished to the desired size simply by using a machining tool, increasing machining efficiency. rate is good.

[0011]

【Example】

Next, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, the electroplated reamer tool 1 has a truncated bullet-shaped tip with a gentle tip. A plurality of protrusions 11 are formed in the details and are formed at equal intervals around the protrusions 11. The abrasive grains , 22 by electrofusion welding. Electrofused abrasive grains The cutting parts 2 formed by parts 21 and 22 are attached to form three stages (R1, R2, R3) of cutting parts with different diameters. As a whole, the cut portion 2 is formed with a stepped portion. This kind of electroplated reamer The case where the tool 1 is used to cut a hole in the metal material 3 will be explained with reference to FIG. 4. Ru.

0012 Insert the electrodeposited reamer tool 1 into a pre-drilled hole in the metal material 3 while rotating it. As you push down, the first cutting part R1 near the tip of the cutting part 2 will be removed first. Cut the inner wall of the hole and remove chips Z1. Next, the second cutting part R2 performs the first cutting process. The inner wall of the hole created by the machining process in section R1 is cut, and chips Z2 are scraped out. Next The third cutting part R3 cuts the inner wall of the hole created by the cutting process of the second cutting part R2, Cut out the chips Z3. In this way, the hole with inner diameter r is finished and the cut is cut out. The chips Z1, Z2, and Z3 are all thin and easy to break up, so it is easy to remove the chips. There is no sticking to the cutting part, and the feed rate of the electroplated reamer tool 1 can be maintained at the same cutting speed. Cutting is performed with a large machining allowance such that these chips Z1, Z2, and Z3 are combined in the machining section. Machining efficiency is better because it is faster than when

00013 Figure 6 shows the cutting process of the conventional electroplated reamer tool and the electroplated reamer tool of the present invention. This is a histogram comparing the feed speeds of the metal material 3 and the material to be cut: When S50C, hole: φ22×301, circumferential speed: 20m/min, machining allowance: 50μm, the present invention This shows that electroplated reamer tool B has a feed rate six times that of conventional product A. Ru.

00014 As mentioned above, one embodiment of the electroplated reamer tool 1 according to the present invention has a two-step stepped portion 21. , 22, but if the required machining allowance is even larger or If the required efficiency is even higher, the number of stages in the cutting section may be further increased.

00015 In addition, the multi-stage cutting part that forms the cutting part mentioned above is cut in the same step. Although the machining parts are cutting on the same surface, the direction perpendicular to the axis of the core metal as shown in Figure 8 The stepped portion adjacent to the electrode reamer tool is retracted spirally in one direction from the tip of the electrodeposited reamer tool. The diameter of the cutting part is gradually increased, and the maximum diameter is reached at the final cutting part. It can also be configured as follows.

00016

[Effect of the idea]

The electroplated reamer tool according to the present invention has multiple stages of cutting parts, and the amount of damage per stage is reduced. Since the machining allowance of the cutting material is small, the chips are easily separated, and only one cutting part is required. The efficiency of cutting is much better than that of conventional products that are cut with a chisel. In addition, Increase the number of cutting parts in each step even for cut materials such as steel and aluminum. By doing so, the machining allowance at each step becomes smaller and the chips become thinner, which greatly improves machining efficiency. can be made better.

[Brief explanation of drawings]

[Fig. 1] A front view showing an embodiment of an electroplated reamer tool according to the present invention.

[Fig. 2] A side view of the electroplated reamer tool seen from the left side of the figure in Fig. 1;

[Fig. 3] A perspective view of the cutting part of the electroplated reamer tool according to the present invention,

[Fig. 4] A diagram illustrating the cutting state of the electrodeposited reamer tool according to the present invention,

[Figure 5] Explanatory diagrams of large machining allowance (B) and small machining allowance (A) in cutting with an electroplated reamer tool,

[Figure 6] Histogram comparing the feed speed of the conventional product and the electroplated reamer of the present invention in cutting processing.

[Fig. 7] A front view of the main part of an electroplated reamer tool of another embodiment in which the stepped portion is configured in a spiral shape,

FIG. 8 is a front view of a conventional electroplated reamer tool.

[Explanation of symbols]

1 Electroplated reamer tool 2 Cutting section 3 Metal materials 11 Projection body 12 Core metal 21 Step part 22 Step part x Abrasive grain R1 First cutting section R2 Second cutting section R3 Third cutting section α Hole diameter β hole diameter Z1 Chips Z2 Chips Z3 Chips r inner diameter

Claims (3)

[Scope of utility model registration request] Claim 1: A plurality of protrusions are provided along the axial direction of the core on the surface including the tapered part on the tip side of the core, which is formed in a tapered part in the shape of a truncated bullet with a gently curved surface on the tip side. By electrodepositing abrasive grains on the outer circumferential surface of these protrusions to form cutting parts, and providing at least one stepped part in each of these cutting parts, it is possible to form a plurality of cutting parts. An electroplated reamer tool characterized by a structure in which the diameter increases in a step-like manner from the tip side of the core metal. 2. A claim characterized in that each stepped portion of the same step provided in the cut portion of the plurality of protrusions is provided around a plane perpendicular to the axis of the core bar. The electroplated reamer tool according to item 1. [Claim 3] Each step portion provided in the cut portion of the plurality of protrusions is arranged at each position in a helical shape with respect to the axis of the core bar. Claim 1
Electroplated reamer tool described in .