JPS61270077A - Segment cutter - Google Patents

Abstract

PURPOSE:To make preliminary working from the standpoint of a function and a design to a base layer easily performable in advance, by setting height size of this base layer to more than 2mm. CONSTITUTION:A segment solidly provided with a base layer 2 and a super abrasive grain layer 3 is joined on an outer circumference of a disclike base metal having a cutter fixed hole 6, forming it into a desired segment cutter. Height size of this base layer 2 is being set to more than 2mm, and as the base layer, such a iron piece as being subjected to drilling, kerf grooving, hollow grooving, etc., is used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a superabrasive segment cutter that is attached to a cutting machine for cutting stone, concrete, tiles, etc.

[Background technology and problems] The cutter installed in a cutting machine for cutting stone, concrete, roof tiles, etc. has a segment made of a steel base whose main component is a bonded powder sintered body containing super abrasive grains such as diamond. It is made by joining by brazing or welding.

In order to improve the bondability between the segments and the base metal, a base layer that does not contain superabrasive grains is usually provided at the portion where the segments come into contact with the base metal.

FIG. 8 is an explanatory view of joining the segment for growing the base layer to the base metal. In the figure, 1 is a disc-shaped base metal made of iron or copper, 2 is a base layer made of iron or iron-based metal powder sintered body, and 3 is a superabrasive grain layer. The super-abrasive grain layer 3 is made by impregnating a bonded powder sintered body 5 with super-abrasive grains 4 such as diamond or CBN, and the base layer 2 and the super-abrasive grain 3 are formed during sintering. They are integrated into segments. An appropriate number of segments formed in this manner are joined to the outer periphery of the base metal 1 by welding or brazing to the base metal 1 on the bottom surface of the base JII2. In the figure, 6 is a cutter fixing hole, and 12 is a cut groove.

Tjl base I! 2 is originally only provided on the segment to improve the jointability of the segment, and is not considered to provide various functions necessary for the cutter, and the height dimension (1) is also used to avoid waste. The conventional wisdom in the diamond tool industry is that there are at most two dragons.

The reason for providing such a base layer is as follows.

(1) The curved surface of the part of the segment that connects to the base metal must be equal to the outer circumference of the base metal, and since the segment has distortion caused by sintering, it is usually machined to obtain an accurate radius.
A surface is created, but if there are super-bottom grains on the machined surface, machining becomes virtually impossible.

(2) In the case of brazing, if superabrasive grains are present on the surface of the brazing layer, the area of the brazing will be reduced accordingly, so a layer that does not contain superabrasive grains is preferable.

(3) In the case of electron beam welding, a portion of the segment melts, and the metal powder sintered body in the adjacent area receives a large thermal shock, resulting in the formation of a brittle structure. As is often the case, it is necessary to provide a special layer of material that is particularly resistant to such thermal shocks.

[Problem] As explained above, the conventional superabrasive layer and base layer are 21!
The height dimension (1) of the base layer in the segment of the structure is only up to 2 cm at most, and the superabrasive layer of the segment and the base metal are too close to each other, and due to space limitations, it is difficult to use as a cutter due to the product design. The base layer cannot be used to impart the desired functionality, design, shape, or pattern.

[Purpose of the invention]
2 with a conventional base layer as described above.
! ! In a cutter that joins segments of a structure, the base layer only serves the purpose of joining the segments to the base metal, but the need for this base layer increases the height of the base layer and allows it to be connected to the segments themselves and to the base metal. The purpose of this is to provide a base metal with various functions and a desirable design.

[Means for solving the problem] For the above purpose, the present invention provides 21! The height dimension (1) of the base layer of the segment of L structure is at least 2III or more, and the base layer can be easily pre-processed in terms of function and design, and the superabrasive grain has various functions and designs. It provides a cutter.

Country The present invention will be explained below with reference to Examples shown in the first factor.

The same parts as in FIG. 8 are indicated by the same reference numerals. Cutter fixing hole 6
A base J! is attached to the outer periphery of a disk-shaped base metal 1 having a 12 The segments integrally provided with the superabrasive grain layer 3 are joined, and the height t of the base B2 of the segment is (at least 2-kilometers or more).The shape of the bottom surface of the base layer 2 may be any shape. However, in terms of the convenience of the joining process with the base metal 1, when the superabrasive grain layer of the segment is worn out due to the use of the cutter and the base comb is formed, the radius of the cutter is R, and it is an arc of (R-t). It is preferable that the base layer 2 has such a large height t.
A two-layered segment with a 2-layer structure can be formed by forming a base layer using a normal base layer powder, but the second
As shown in the figure, an iron piece 9 having the required dimensions and shape is placed in advance into a part of the punch of a mold 8 for molding the ultra-low grain layer powder 7 containing super abrasive grains 4, or into a molding mold. 8 as the punch itself, we are exploring a method of sintering the ultra-low grain layer powder 7 by hot compression, and at the same time hot-pressing the iron piece 9 as a base layer to the same sintered body to integrate it. is convenient. In order to improve the bondability between the ultra-low grain layer sintered body and the iron piece 9, the joining surface of the iron piece 9 may be plated with a metal such as Sn+Cu+Ni, or the iron piece 8 may be coated with metal such as those shown in FIGS. 3(a) and (b). The bonding strength can be further improved by using a material with wedge-shaped unevenness as shown in the figure.

(() The figure shows a steel piece 9 with multiple (wedge-shaped unevenness) processed in the direction perpendicular to the length direction, ((b))
The figure shows a piece of iron 9 in which wedge-shaped irregularities 6 are formed in the length direction. Considering the purpose of adding these unevenness,
Various possibilities are possible, such as a combination of (a) and (b), or a shape in which the unevenness of (o) is reversed.

Figures 4 (A), (→, (C), 2), (E), and (F) illustrate examples in which the base layer of the segment of the present invention is formed in accordance with various intended functions. There is. 2) The figure shows a so-called stepped base layer in which the cross section of the base layer is T-shaped. (b) The figure shows a base layer in which the cross section of the base layer is tapered. These are capable of holding the wide superabrasive grain layer 3 integrally on its upper surface and matching the thickness of the base metal at its lower end. The one shown in (c) is one with holes drilled, and the one shown in (b) is one with grooves, both of which have functions such as heat dissipation and discharge of chips. Figures (e) and (f) have recessed grooves and diagonal recessed grooves, respectively, and both have functions such as removing chips and forcing lubricating fluid.

Examples (a) to (f) shown here provide desirable functions as a cutter, but it goes without saying that combinations and modifications of these shapes are possible.

Figure 5 shows the heat dissipation that is formed over the image area by joining the February structure segments that have undergone various base layer processes and the base metal that has been processed to function in accordance with the area where the base layer has been processed. Items with functions, a cut rice discharge function, and other design patterns are shown. Although the figure shows an example in which each segment has a different configuration, it goes without saying that in reality, in many cases, multiple segments with the same pattern are joined to the outer periphery of the base metal. Nor.

When attaching the base layer by the method shown in FIG. 2, hot compression sintering may be performed using an iron piece 9 previously processed into a desired shape. The shape of the base layer 1 as shown in FIG. 4 on the iron piece 9 can be easily and inexpensively mass-produced using ordinary sheet metal processing, forging, machining, and other techniques.

This segment is brazed to the base metal 1 which has undergone various processing,
Join by welding. The embodiment shown in FIG.
It is useful for suppressing noise through vibration damping, alleviating stress concentration during cutting, etc., and also expands the degree of freedom in design. Also, if the present invention is applied,
It is also possible to design a segment cutter that can be attached and detached by a mechanical mechanism without necessarily fixing the segments by welding or brazing.

FIG. 6 shows another embodiment of joining the base metal 1 and the segments.As shown in the figure, grooves 10 are provided on the outer periphery of the base metal 1 at required intervals, and Even the protruding part! ! The protrusion of the base layer of the segment is formed in the kerf 10! ! They are joined by fitting, brazing, or welding.

[Test example: Super abrasive grain: 85% Cu + 15% Sn without super abrasive grain) l￥
Mixed powder, applicable layer Length 32 cm, thickness 2.0 cm, R arc 4 G base layer: 5 PCC length 32 cm, thickness 2.0 cm, height 1) 7 dragons 1 r Arc 39 @ mr demon
The length of the r surface is 27■■, and a right-angled protrusion waveform is attached to the R arc surface with a pitch of 3II11.

See Figure 7 above.

The mixed powder is filled into a mold in which iron pieces 9 that will become the base layer are placed in a part of a punch, heated to 730°C in a hydrogen stream, and the base layer is sintered at the same time as the powder is sintered under a pressure of 1 ton/C 3. Pressure welding was performed.

The segment of the 2Fa structure obtained above was
Dragon, thickness I! - Electron beam welding was performed on the circular base metal 1 of 5 pcc.

Electron beam welding conditions Acceleration voltage 150 kV, Electron flow 2.5 mAt, Electron irradiation gland width 1 m - 1 m Airspace 2 cutting 0.4 cm Hg When measuring the adhesive strength of the segment, it was found that even when a torque of 110 kg, cm was applied. No breakage occurred, but the base metal was bent. Adhesive strength is sufficiently high.

[Effects] As explained above, in the conventional 2M structure segment, the height dimension of the base layer is only taken into account the connection with the base metal, and is extremely small at less than 2m. Accordingly, in the present invention, the height dimension of the base layer of the cutter segment having a two-layer structure is set to be 2 cm or more. Since this base layer is directly below the superabrasive grain layer, it is easy to add a function that directly affects the superabrasive grain layer, for example by adding grooves for discharging chips.
It can be realized at a low cost, and various types of processing, which were extremely difficult to manufacture in the manufacture of conventional cutters that join base layers with a height dimension of 21 or less, becomes extremely easy.

Specifically, after joining the segments to the base metal using the conventional method, drilling a half-moon-shaped keyhole-shaped hole in the base metal as illustrated in Figure 5 requires special processing machines and tools, and in some cases Even though the segment of the present invention as illustrated in Fig. 4 (c) and (b) has to be processed over a long period of time using an expensive electrical discharge machine or laser processing machine, the segment of the present invention can be used as an example. It can be easily molded. In addition, a concave groove is made by cold forging just below the ultra-low grain layer as shown in Fig. 5, and this is used to make segments as shown in Fig. 4 (E) and (F), which are then used as the base metal. If you try to add grooves by cold forging after joining, it will cause extreme distortion to the base metal, so such work is virtually impossible.
The present invention can sufficiently solve these problems.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the invention. FIG. 2 is an explanatory diagram of segment production. Figure 3 (a), ←) shows the shape of the iron piece that will become the base layer. In FIG. 4, (a), (t2), (c), ni), ni), and (f) respectively indicate segments used in the present invention. FIG. 5 shows various embodiments of the present invention. FIG. 6 shows another embodiment of the invention. FIG. 7 is an explanatory diagram of a test example of the present invention. FIG. 8 shows a conventional cover with two-layer segments. ]
l... Base metal, 2... Be-XIL3-... Super abrasive layer,
4... Super abrasive grain, 5... Super abrasive wear bond powder sintered body, 8... Cutter fixing hole, 7... Super abrasive wear bond powder, 8... Molding mold , 9... Iron piece, 1G... Cut groove of base metal for fixing segment, 11... Base layer protrusion, 12... Cut groove of base metal. Wharf 1 Figure 2 Mine 5 Figure 8 Procedures Amendment Book B, 1985 2? Day 1, Indication of the case 1985 Patent application No. 113871 2゜Name of the invention Segment cutter 3, Person making the amendment Relationship to the case Patent applicant Address 2-80 N Kitamachi, Sakai City, Osaka Prefecture Name of address
Name Kei Ohurane, President and CEO of Osaka Diamond Industries Co., Ltd. - 4, Agent 6, Detailed description of the invention subject to amendment Drawing 7, Contents of the amendment H) Page 2, line 15 of the specification, r-structure ' is corrected to 'steel'. (2) On page 9, lines 6 to 9, delete the phrase ``If the present invention is applied...design will also become possible.'' (3) Page 9, line 16, r. ” and the 17th line, between “[Test Example]”, change the line to “Also, if the present invention is applied, the segments can be attached and detached by a mechanical mechanism without necessarily having to be fixed by welding or brazing.” It also becomes possible to design a possible segment cutter." (4) Page 9, line 18 and ! Correct the third line as follows. "Super abrasive grain applicable layer: 85% CLL + 15% 5 without super abrasive grain
n) U gold powder, length 32mm, thickness 2.0L - 1R arc 46cmR" (5) In the 12th line due east of the same No. 1, "half-moon-shaped" is corrected to "half-moon-shaped." ([i) Same page 11, line 19, ``The concave groove is next to J,
Insert the following sentence. "To attach it, use a base layer iron piece with a concave groove as shown in Figure 4 (E) and (F)." (7) Same item! Insert the following sentence after "Joining" in the first line of page 2. "It would be easy to do this, but we would use the conventional method to join the segments to the base metal." (8) Delete the current Figure 6 and submit attached Figure 6.

Claims (3)

[Claims] (1) In a segment cutter formed by joining a two-layer structure segment consisting of a superabrasive grain layer and a base layer to the outer periphery of a disc-shaped base metal, the height dimension of the base layer as the two-layer structure segment is A segment cutter characterized by using a two-layer structure segment having a length of 2 mm or more. (2) The segment cutter according to claim 1, characterized in that the base layer is an iron piece that has been subjected to drilling, kerfing, recessed grooves, etc. (3) The segment cutter according to claim 1, characterized in that the base metal is processed to correspond to the base layer that has been processed by drilling, kerf processing, recessed groove processing, etc. .