JPH01236953A - Manufacture and usage of crushing roller - Google Patents
Manufacture and usage of crushing rollerInfo
- Publication number
- JPH01236953A JPH01236953A JP63061643A JP6164388A JPH01236953A JP H01236953 A JPH01236953 A JP H01236953A JP 63061643 A JP63061643 A JP 63061643A JP 6164388 A JP6164388 A JP 6164388A JP H01236953 A JPH01236953 A JP H01236953A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- wear
- reduced
- diameter
- reduced diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims description 17
- 230000006866 deterioration Effects 0.000 claims description 3
- 230000002250 progressing effect Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract 3
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000000463 material Substances 0.000 description 15
- 238000010276 construction Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
- B02C15/005—Rollers or balls of composite construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本願発明は竪型ミルに使用し、自転・公転しつつ粉砕の
主役を務める粉砕ローラの製造方法および使用方法に係
る技術である。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of manufacturing and a method of using a grinding roller that is used in a vertical mill and plays the main role in grinding while rotating and revolving around its axis.
［従来の技術］
竪型のミルとしては第３図に示すように水平に回転する
粉砕テーブル７ａの上で回動する複数のローラ１ａがテ
ーブル上面に押圧するように付勢され、被砕物が粉砕室
８ａの上部よりチャージされてテーブル中央から遠心力
によって外周へ寄せられ、ローラとテーブル間で圧下摺
動されて粉化して外側へ押出される型式がある。[Prior Art] As shown in FIG. 3, in a vertical mill, a plurality of rollers 1a rotating on a horizontally rotating pulverizing table 7a are urged to press against the top surface of the table, and the material to be crushed is crushed. There is a type in which the powder is charged from the upper part of the grinding chamber 8a, moved from the center of the table to the outer periphery by centrifugal force, and is slid under pressure between a roller and the table to be powdered and extruded to the outside.
一方、第４図に示すように固定したテーブルの上でその
面上に自転しつつ自らの外周を押圧する複数（通常３ケ
）のローラ１ｂを回転させ、その間に被砕物を噛み込ん
で粉砕する型式もおる。これら竪型ミルは石炭、セメン
トクリンカ−２高炉スラグなどに広く使用されボールミ
ルなどのドラム型に比へて効率の高さを烏っている。何
れの型式にしろ問題となるのはローラの摩耗であり、通
常被砕物の種類やミルの作動条件１こよっても異なるが
、ローラの表面から均等に摩耗がａｈすることはなく不
均一な曲線を描いて摩耗していく。そのため申に均等に
押圧するだけでは粉砕面が歪つとなって粉砕効率が次第
に劣化していくので、耐えられなくなったところで新品
と取り替えるか、又はその摩耗部分を溶接などの肉盛に
よって再生している。一方この取り替えまでの時間を延
伸するためと、中央の回転軸の嵌合部の加工を容易にす
るため、新品の状態からあらかじめ予測される摩耗特性
に従って外側面の輪郭が摩滅した粉砕ロールの外表面を
模写するように外側面を成形する技術を提案したものも
ある。（特公昭５８−１０１４３号公報 第５図Ａ、Ｂ
）。 図はこの公報から転載した実施例であり、ボディ
部分１ｃは比較的軟らかい加工のしやすい金属よりなり
、外表面４ｃ＋は摩耗し難い硬い材料で作られ、まずボ
ディの外側面は鋳造または機械加工で所望の輪郭（摩滅
した後の表面）で形成し、この上へ硬い材料を一様の厚
みの川を外側へ固定する。（したがって固定した後の表
面も当然摩滅した後の表面を模写している。）このよう
な粉砕ロールを装着し使用すると、ローラの表面が受け
ることとなる摩損のパターンが硬い表面を適用するボデ
ィ部側曲の成形時に写しとられているため、どの部分も
他の部分より余分に摩滅することなく均等に摩耗し同じ
状態が保持できると謳っている。On the other hand, as shown in Fig. 4, a plurality of (usually 3) rollers 1b are rotated on a fixed table and press the outer periphery of the rollers 1b while rotating on the surface thereof, and the material to be crushed is bitten and crushed between them. There are also models that do. These vertical mills are widely used for coal, cement clinker, blast furnace slag, etc., and are more efficient than drum mills such as ball mills. Regardless of the type, the problem is the wear of the rollers, which usually varies depending on the type of material to be crushed and the operating conditions of the mill, but the wear does not spread evenly from the surface of the rollers, resulting in uneven curves. It wears out as it is drawn. For this reason, if you just apply pressure evenly to the grinding surface, the grinding surface will become distorted and the grinding efficiency will gradually deteriorate, so when it becomes unbearable, you should replace it with a new one, or regenerate the worn part by overlaying with welding or other means. There is. On the other hand, in order to extend the time until this replacement and to facilitate machining of the fitting part of the central rotating shaft, the outer surface of the grinding roll has been worn out according to the wear characteristics predicted in advance from the new state. Some have proposed techniques to mold the outer surface to mimic the surface. (Special Publication No. 58-10143 Figure 5 A, B
). The figure shows an example reproduced from this publication, in which the body portion 1c is made of a relatively soft metal that is easy to process, and the outer surface 4c+ is made of a hard material that is hard to wear.First, the outer surface of the body is made by casting or machining. Form with the desired contour (surface after wear) and onto this a rigid material is fixed outward with a uniform thickness. (Therefore, the surface after being fixed naturally also imitates the surface after being worn away.) When such a grinding roll is installed and used, the pattern of wear and tear that the surface of the roller undergoes is similar to that of the body to which the hard surface is applied. It is claimed that because the images are copied during the molding of the side curves, no part wears out more than the other parts, and it wears evenly and maintains the same condition.
［発明が解決しようとする課題１
前に掲げた従来技術（第５図Ａ、Ｂ）の実施例ではロー
ラ表面の摩耗がほぼ均等か（Ａ）、または上部（大径側
）端を除いてほぼ均等（Ｂ）に進行し、摩耗の進んだ後
を規定した所定の輪郭もほぼ直線であるように解される
。したがって、その上に均一の厚さで固定した硬質の異
種金属苦によって形成される外周面も前記直線を平行移
動した直線で模写したものの如くである。この状態は引
例出願の発明者によって確ル２されたところであろうが
、当該引例中でも述べられているように摩耗の進行は被
砕物ヤミルの稼動条件によって大きく異なるものであり
、またミルの機種によっても大きく異なることは論を俟
たない。本願出願人の経験プるところでは少なくともセ
メントクリンカ−の摩砕についてはこのようなほぼ直線
的な摩耗の進行ｔよ見ることがなく、必ず不均一な歪っ
の曲線を辿ることに例外はない。[Problem to be Solved by the Invention 1] In the embodiment of the prior art (Fig. 5 A and B) listed above, is the wear of the roller surface almost uniform (A) or except for the upper (large diameter side) end? The predetermined contour which progresses approximately evenly (B) and defines the state after the wear has progressed is also understood to be approximately a straight line. Therefore, the outer circumferential surface formed by a hard dissimilar metal layer fixed thereon with a uniform thickness also appears to be a straight line that is translated in parallel to the above-mentioned straight line. This state was probably confirmed by the inventor of the cited application2, but as stated in the cited reference, the progress of wear varies greatly depending on the operating conditions of the mill for crushed material, and also depends on the model of the mill. There is no denying that there is a big difference. According to the applicant's experience, at least when it comes to attrition of cement clinker, such a nearly linear progression of wear is never seen, and without exception it always follows a non-uniform curve of distortion. .
すなわち、第３図の型式の竪型ミルにおいては第６図Ａ
からスタートして外周側に１一つだ摩耗が集中し、同Ｃ
の状態に至って内外周を反転して使用する結果、同りの
ような最終の輪郭を示す。このような状態では最早課せ
られた粉砕効率が得られなくなるのでを却乃至肉盛再生
するが、新品のボディの外周をこのような輪郭とし、こ
の十に胸肉の硬化層を固定したとすれば、なるほど仝面
均等に摩耗が進行していくの（よ確かだが、取付の最初
から劣弱な粉砕効率に甘んじて稼動しな（ブればならな
いのではなかろうが。In other words, in the vertical mill of the type shown in Fig. 3, Fig. 6A
Starting from 1, the wear was concentrated on the outer circumference, and the same
When this state is reached, the inner and outer circumferences are reversed and used, resulting in the same final outline. In such a state, it is no longer possible to obtain the required crushing efficiency, so we will either abandon or rebuild the overlay, but if the outer periphery of a new body is shaped like this, and the hardened layer of breast meat is fixed to this tenth, then Well, I'm sure that the wear progresses evenly on all sides (I'm sure), but I don't think you have to settle for poor grinding efficiency from the beginning of the installation.
また、第４図に示すような竪型ミルにおいてはローラは
第７図のような摩耗曲線を辿ることか本願発明者らの汎
く経験するところであり、全面で両部材が押圧すべき当
該ミルとしてはこの曲線を模写した表面では効率上の危
惧を払拭し切れない。In addition, in a vertical mill as shown in Fig. 4, the rollers follow a wear curve as shown in Fig. 7, which the inventors of the present invention has widely experienced. However, with a surface that replicates this curve, concerns regarding efficiency cannot be completely eliminated.
第二の課題として提起したいのは外周異種金属の重合の
作業性である。引例は特にこの点を限定していないが説
明によれば溶着材料の層、また（ユ硬い仕上げ面の形の
層であっても良いとしている。The second issue I would like to raise is the workability of polymerizing dissimilar metals around the periphery. Although the reference does not specifically limit this point, the explanation states that it may be a layer of welding material or a layer in the form of a hard finished surface.
常識的に１，１溶接肉盛が多用されると解されるが、こ
の場合最も能率のよいのは潜弧）ｄ接法をはじめとする
自動溶接法によるものである。引例をはじめ従来公知の
新品への肉盛補強時に一番問題となるのはローラ両端の
コーナ部の立ち上がりをいかに成形するかにある。It is common knowledge that 1,1 weld overlay is often used, but in this case, the most efficient method is automatic welding, such as the submerged arc (d-tangential) method. The most important problem when reinforcing overlays on new products, including the cited example, is how to form the rising edges of the corners at both ends of the roller.
第８図へにおいて］−す部Ｃは熱容量が小さいため、通
常の施工条件では溶は落もて溶ｉ金属にならない。溶は
落ちないためには大幅に電流１泊を下げて少量の溶る金
属を何回にも手ねて成形する必要があるのでこの部分の
み異なる加工条件で選定しなければならないが、作業性
は著しく低い。To Fig. 8] Since the heat capacity of the part C is small, the melt will not drip and become molten metal under normal construction conditions. In order to prevent the melt from dripping, it is necessary to significantly lower the current and knead a small amount of meltable metal many times, so this part must be selected under different processing conditions, but the workability is significantly low.
さらに一般に長所の多い潜弧溶接法を適用する場合には
、特にフラックスの安定化が困難で正確な形状を形成す
ることが難しい。Furthermore, when applying the submerged arc welding method, which generally has many advantages, it is particularly difficult to stabilize the flux and form an accurate shape.
第８図Ｂはこの課題を解決するための一手段で公知技術
である。コーナ部Ｃに帯鋼材で製作したリング１０を仮
付けして自動溶接のスタートを支保するものであるが、
リング作成や取付けの作業が煩瑣である上、帯鋼材と溶
着金属の作業成分が異なりすぎると両者の溶接性の問題
や両者間に形成される希釈層に使用中に問題発生を促が
す要因か隠れている懸念が残されている。FIG. 8B is one means for solving this problem and is a known technique. A ring 10 made of steel strip material is temporarily attached to the corner C to support the automatic start of welding.
The work of making and installing the ring is cumbersome, and if the working components of the steel strip and the weld metal are too different, problems may arise in weldability between the two, and problems may occur during use due to the diluted layer formed between the two. However, hidden concerns remain.
本願発明は以上に述ぺた課題を解決するために粉砕ロー
ラの外周に新品状態から硬化層を肉盛するに際し、最も
肉盛作業の効率と使用時の粉砕効率を重視したローラの
製造方法および以後の使用方法を提供することを目的と
する。In order to solve the above-mentioned problems, the present invention provides a method for manufacturing a roller that emphasizes the efficiency of overlay work and the crushing efficiency during use when overlaying a hardened layer on the outer periphery of a crushing roller from a new state, and the following. The purpose is to provide instructions on how to use the .
［課題を解決するための手段］
本願発明に係る粉砕ローラの製造方法は、外周面の不均
一な摩耗進行が経験上知られる場合、両端に堰を残して
正規の外周面に倣って一定温さの縮径部を凹設し、前記
堰に支保された自動溶接法にて均等な肉盛を施工して縮
径分を重合することによって前記の課題を解決した。[Means for Solving the Problems] In the method for manufacturing a crushing roller according to the present invention, when it is known from experience that the outer circumferential surface wears unevenly, the grinding roller is heated at a constant temperature by leaving weirs at both ends and following the regular outer circumferential surface. The above-mentioned problem was solved by recessing the reduced diameter part of the pipe, applying uniform overlay using an automatic welding method supported by the weir, and polymerizing the reduced diameter part.
また、使用方法としては使用中に不均一な摩耗が進行し
その最深部が前記縮径部の何れかに達したとき、再び支
保された自動溶接法により不均一な該摩耗部分を重合し
て再び使用することを示し、さらにここで特定する縮径
部について、その深さはあらかじめ経験によって知られ
る許容し得る粉砕効率の最大劣化分によって決定するこ
とを具体的に示して前記の課題を解決した。In addition, the method of use is that when uneven wear progresses during use and the deepest part reaches any of the reduced diameter parts, the uneven wear part is polymerized by an automatic welding method that is supported again. The above problem is solved by indicating that it will be used again, and further indicating that the depth of the reduced diameter section specified here is determined by the maximum allowable deterioration in crushing efficiency known in advance from experience. did.
［作用・実施例コ
本願発明の作用を実施例を示す第１図、第２図に基いて
説明する。[Operation/Example] The operation of the present invention will be explained based on FIGS. 1 and 2 showing an example.
第１図は第３図で先に示したテーブルロールに使用する
粉砕ロール１Ａである。このロールをセメントタリンカ
ーなどの微粉砕に使用すると、その表面は不均一な摩耗
が進行して後退し、内外周逆転して使用する結果、第６
図りのように変化することは既に述べたとおりである。FIG. 1 shows a crushing roll 1A used for the table roll shown earlier in FIG. When this roll is used for pulverizing cement tarinkers, etc., its surface becomes unevenly worn and recedes, and as a result of being used with the inner and outer circumferences reversed, the 6th
As already mentioned, it changes as planned.
肉盛に際してはこのような不均一摩耗が予想されるにも
拘らず一定の深さＨＡだけ縮径した縮径部２Ａを新品状
態で凹設し、その両端には必ず堰３Ａを設けておく。そ
うすると自動溶接で縮径部２Ａｊｒ重合していく作業に
おいて、そのスタート時に当該堰３Ａで支保されるから
完全に他の施工条件と全く同一条件で最も効率よくはじ
めから進行することができる。より詳しくはアーク電流
、アーク電圧、予熱温度２層間温度、アーク走行速度の
他、溶接ワイヤーの特性、電源特性などが施工条件とし
て設定されるべきであるが、本件対象の溶着金属が高硬
度の摩耗特性を具えることが必須である以上、後に述べ
るように高合金、高炭素の材質を処理する要件が特徴的
であり、このような難溶接性の材料を最も効率よくかつ
品質を保証して溶着するために、縮径部両端に堰を設け
てこの支保作用に支援されて完全な課題解決を見ること
ができた。When overlaying, even though such uneven wear is expected, a reduced diameter part 2A reduced in diameter by a certain depth HA is recessed in the new state, and weirs 3A are always provided at both ends of the reduced diameter part 2A. . Then, in the work of automatically welding the reduced diameter part 2Ajr, since it is supported by the weir 3A at the start, it is possible to proceed most efficiently from the beginning under completely the same conditions as other construction conditions. In more detail, arc current, arc voltage, preheating temperature, temperature between two layers, arc running speed, welding wire characteristics, power supply characteristics, etc. should be set as construction conditions. Since it is essential to have good wear characteristics, the requirements for processing high-alloy, high-carbon materials are unique, as will be described later. Weirs were installed at both ends of the reduced diameter section in order to weld the parts together, and with the support of these weirs, we were able to completely solve the problem.
摩耗の進行と共に高硬度の溶着部４Ａといえども同一の
曲線を残して次第に後退するのはやむを得ないが、進行
の再先端ＰＡが縮径部の深さＨＡをこえて縮径部２Ａの
何れかに達したときはその金属表面の材質の差による外
観が明らかに視認できるから、その場で装置の稼動を停
止して、あらかじめ用意した予備の当該ローラと置換す
るような点検をＷ単化しておく。取り外した粉砕ローラ
は必ず両端に堰となるべき部分が残っているからこの部
分に支保されて作業性の高い自動溶接によって元の外周
に相当する面まで盛上げる。この縮径部の深ざＨＡが本
願発明の別のポイントでもあり、あらかじめ経験によっ
て知られた摩耗進行と粉砕効率劣化の相関性を粉砕ロー
ラの製造および使用の要件として設定するところが特徴
である。As wear progresses, it is unavoidable that even the welded part 4A, which has high hardness, gradually retreats while leaving the same curve. When the roller reaches that point, the appearance due to the difference in the material of the metal surface is clearly visible, so the operation of the equipment is stopped on the spot, and the inspection is performed by simply replacing the roller with a spare roller prepared in advance. I'll keep it. The removed crushing roller always has parts remaining at both ends that should serve as weirs, so it is supported by these parts and raised up to the surface corresponding to the original outer periphery by automatic welding, which is highly workable. The depth HA of the reduced diameter portion is another point of the present invention, and the feature is that the correlation between the progress of wear and the deterioration of the grinding efficiency, which is known in advance from experience, is set as a requirement for manufacturing and using the grinding roller.
第２図は第４図に示す別の形式のミルローラの粉砕ロー
ラ１Ｂの実施態様を示し、符号で示すＨ８，２８，３８
，４Ｂ、Ｐａは何れも先に述べた第−例と同一名称であ
る。実施上は溶着前の粉砕ローラに余肉５および６を両
端に付加しておき溶接後、この部分を加工削除する方法
が推薦できる。これによって最初の自動溶接の条件を目
的に叶うように容易なものに置き換え、使用に際しては
摩耗にあまり耐性のない部分が使用面ＩＪ霜甲すること
を防止して目的達成をより有効に果す実施例特有の効果
を派生する。FIG. 2 shows an embodiment of the grinding roller 1B of the mill roller of another type shown in FIG.
, 4B, and Pa have the same names as the first example described above. In practice, it is recommended to add extra thickness 5 and 6 to both ends of the crushing roller before welding, and then process and remove these parts after welding. This allows the initial automatic welding conditions to be replaced with ones that are easier to meet the purpose, and during use, prevents parts that are less resistant to wear from becoming frosted on the IJ surface, thereby achieving the purpose more effectively. Derive example-specific effects.
本願発明の実施例として次のような材質の組み合せや溶
接条件か望ましい。As an embodiment of the present invention, the following material combinations and welding conditions are desirable.
ローラの基本部分を構成するベース材料には普通鋳鋼や
ダクタイル鋳鉄などのように、加工性。The base material that makes up the basic parts of the roller has good workability, such as ordinary cast steel and ductile cast iron.
切削性に優れ経済性も高い材料を使用する例と、一方そ
れ自体が耐摩耗性を有するが難切削性であり高価なニハ
ード鋳鉄とか高クローム鋳鉄なとが使用されるケースも
ある。これらは用途とユーザの意向によってその都度最
適の選択がなされるが何れの選択となってもそれらの外
表面に硬化層を形成することによって寿命を大幅に延長
せしめる点については同一である。In some cases, materials with excellent machinability and high economic efficiency are used, while in other cases, materials such as nihard cast iron or high chromium cast iron, which have wear resistance but are difficult to cut and are expensive, are used. The optimal selection of these materials is made depending on the application and the user's intentions, but no matter which selection is made, the fact that a hardened layer is formed on the outer surface of the materials greatly extends their service life is the same.
外表面に形成される硬化層には一般によく知られている
とおり、炭素３〜７％、クローム２０〜３０％を基本成
分とし、これにマンガン１〜４％。As is generally well known, the hardened layer formed on the outer surface contains 3 to 7% carbon, 20 to 30% chromium as basic components, and 1 to 4% manganese.
珪素０．５〜２％を加え、さらにモリブデン、ジルコン
、チタンなどを少量（０〜２％）添加したものが適用さ
れるのが普通である。この硬化層は潜弧溶接法を代表と
する各種自動溶接法を用いて短時間にまとまって溶着金
属を溶着せしめると共に、それらの施工に際して１ユ充
分に選択され安定した条件によって施工されることが経
済性２品質のレベルを確保するための重要な要因となる
。Usually, 0.5 to 2% of silicon is added, and a small amount (0 to 2%) of molybdenum, zircon, titanium, etc. is added. This hardened layer can be formed by welding the deposited metal in a short time using various automatic welding methods such as submerged arc welding, and can be applied under carefully selected and stable conditions. Economy 2 is an important factor in ensuring the level of quality.
本願の外表面の硬化層を形成されるべき部分の両端に堰
を設ける方法によれば、外表面の硬化層形成の作業のス
タートから完了に至るまで一山して安定した変わらぬ条
件で施工することが可能となり、堰のない形状のそれと
比較して施工時間１よ２０〜２５％節約２５％ことが確
認されている。According to the method of providing weirs at both ends of the part where the outer surface hardened layer is to be formed, the work of forming the outer surface hardened layer can be carried out under stable and unchanging conditions from the start to the completion. It has been confirmed that construction time can be reduced by 20 to 25% and 25% compared to a shape without a weir.
さらに、硬化層全体の中で発生する硬度のバラツキも殆
どなく全表面、仝溶着層に口って極めて均一性の高い安
定した硬化層の形成が可能となることが確認されている
。Furthermore, it has been confirmed that there is almost no variation in hardness within the entire hardened layer, and it is possible to form a stable hardened layer with extremely high uniformity over the entire surface and the welding layer.
［発明の効果コ
本＠発明は以上詳しく述べたように粉砕ローラの外周を
市らかしめ高硬化層で重合するに際し、最も効率的で品
質的にも安定した溶接方法を１）定すると共に、使用先
の作業条件を最も安定化する使用方法に及び、製造・使
用の総合的な評価を一元化したシステマチックな要件で
まとめた点に従来にない顕著な技術的特徴がある。製造
者と使用者の関連プレーがよい経済的実績を担保する新
しいソフトを提案する試みと言い替えてもよい。[Effects of the Invention] As described in detail above, the present invention provides 1) the most efficient and stable welding method in terms of quality when the outer periphery of the crushing roller is tightened and polymerized with a highly hardened layer; It has an unprecedented technical feature in that it compiles comprehensive evaluations of manufacturing and use into unified and systematic requirements, including the method of use that most stabilizes the working conditions at the place of use. This can also be described as an attempt to propose new software that ensures good economic performance through the relationship between manufacturers and users.
第１図、第２図はそれぞれ異なる本願実施例を示す正面
断面図、第３図と第４図は本願ローラが組込まれたそれ
ぞれ異なる竪型ミルの正面図、第５図Ａ、Ｂは従来技術
の正面断面図、第６図Ａ。
Ｂ、Ｃ，Ｄは第３図の型式の粉砕ローラ表面の摩耗の進
行を示す正面断面の部分図、第７図は第４図に示す型式
の粉砕ローラ表面の摩耗後の形態を示す正面断面図、第
８図Ａ、Ｂは従来の技術の課題を示す正面断面の部分図
。
１Ａ、１Ｂ・・・・・・粉砕ローラ
２Ａ、２Ｂ・・・・・・縮径部
３△、３Ｂ・・・・・・堰
４Ａ、４Ｂ・・・・・・溶着部
５．６・・・・・・・・・・・・余肉
Ｈ△、ＨＢ・・・・・・縮径部の深さFigures 1 and 2 are front sectional views showing different embodiments of the present application, Figures 3 and 4 are front views of different vertical mills incorporating the rollers of the present invention, and Figures 5A and B are conventional Front sectional view of the technique, Figure 6A. B, C, and D are partial front cross-sectional views showing the progression of wear on the surface of the crushing roller of the type shown in Figure 3, and Figure 7 is a front cross-sectional view showing the form of the surface of the crushing roller of the type shown in Figure 4 after wear. 8A and 8B are partial front cross-sectional views showing problems of the conventional technology. 1A, 1B...Crushing rollers 2A, 2B...Reduced diameter part 3△, 3B...Weir 4A, 4B...Welded part 5.6...・・・・・・・・・Excess thickness H△, HB・・・・・・Depth of reduced diameter part
Claims (3)
じめ縮径して製造し、その縮径分を別の耐摩耗性金属で
重合する粉砕ローラの製造方法において、外周面の不均
一な摩耗進行が経験上知られる場合、両端に堰を残して
正規の外周面に倣って一定深さの縮径部を凹設し、前記
堰に支保された自動溶接法にて均等な肉盛を施工して縮
径分を重合することを特徴とする粉砕ローラの製造方法
。(1) In the manufacturing method of the crushing roller, in which the outer periphery of the crushing roller rolling in a vertical mill is reduced in diameter in advance, and the reduced diameter is polymerized with another wear-resistant metal, the outer circumferential surface is uneven. If it is known from experience that wear is progressing rapidly, weirs are left at both ends, and a reduced diameter part of a certain depth is recessed following the regular outer circumferential surface, and an automatic welding method supported by the weirs is used to apply uniform overlay. 1. A method for manufacturing a crushing roller, characterized in that the diameter-reduced portion is polymerized.
進行しその最深部が前記縮径部の何れかに達したとき、
再び支保された自動溶接法により不均一な該摩耗部分を
重合し、再び使用することを特徴とする粉砕ローラの使
用方法。(2) When the grinding roller according to claim 1 undergoes uneven wear during use and its deepest part reaches any of the diameter-reduced parts,
A method of using a grinding roller, characterized in that the non-uniformly worn parts are polymerized by a re-supported automatic welding method and used again.
め経験によつて知られる許容し得る粉砕効率の最大劣化
分によって決定することを特徴とする粉砕ローラの製造
方法又は使用方法。(3) A method of manufacturing or using a grinding roller according to claim 1 or 2, characterized in that the depth of the diameter reduction is determined by the maximum allowable deterioration in grinding efficiency known in advance from experience.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061643A JPH01236953A (en) | 1988-03-14 | 1988-03-14 | Manufacture and usage of crushing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63061643A JPH01236953A (en) | 1988-03-14 | 1988-03-14 | Manufacture and usage of crushing roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01236953A true JPH01236953A (en) | 1989-09-21 |
Family
ID=13177102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63061643A Pending JPH01236953A (en) | 1988-03-14 | 1988-03-14 | Manufacture and usage of crushing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01236953A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06304490A (en) * | 1993-03-16 | 1994-11-01 | Babcock & Wilcox Co:The | Asymmetrical tire for pulverizer |
| WO2002089988A1 (en) * | 2001-05-04 | 2002-11-14 | Foster Wheeler Energy Corporation | Roller mill |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55165149A (en) * | 1979-06-11 | 1980-12-23 | Mitsubishi Heavy Ind Ltd | Roller for powdered coal combustion apparatus |
| JPS6150646A (en) * | 1984-08-20 | 1986-03-12 | 三菱重工業株式会社 | Roll for roller mill |
-
1988
- 1988-03-14 JP JP63061643A patent/JPH01236953A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55165149A (en) * | 1979-06-11 | 1980-12-23 | Mitsubishi Heavy Ind Ltd | Roller for powdered coal combustion apparatus |
| JPS6150646A (en) * | 1984-08-20 | 1986-03-12 | 三菱重工業株式会社 | Roll for roller mill |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06304490A (en) * | 1993-03-16 | 1994-11-01 | Babcock & Wilcox Co:The | Asymmetrical tire for pulverizer |
| WO2002089988A1 (en) * | 2001-05-04 | 2002-11-14 | Foster Wheeler Energy Corporation | Roller mill |
| US6824088B2 (en) | 2001-05-04 | 2004-11-30 | Foster Wheeler Energy Corporation | Roller mill |
| ES2255372A1 (en) * | 2001-05-04 | 2006-06-16 | Foster Wheeler Energy Corporation | Roller mill |
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