XPM-Φ120×3三頭研磨機是一種干法磨細分析樣品的研磨設備，主要供冶金、建材、化工、煤炭、水電、商檢、地質等部門實驗室磨細分析樣品之用，也可以供有關方面作為磨細一般少量物料之用。

XPM-Φ120×3 triple sers mill is a kind of grinding equipment which mill and analyze samples through dry grinding. Such mills are mainly used to mill and analyze samples by laboratories in departments such as metallurgy, building material, chemical, coal, water and electricity, commercial inspection, and geology. They are also used to grind a small quantity of materials.

三、主要結構說明

Main Structure

本機結構主要由三套磨頭、離盒器、研缽支座、及定位器等總裝組成。

The structure of such machine is as shown in Figure to Figure. See Figure for its overall structure which is mainly composed of three sets of grinding heads, clutch, mortar support, localizer, etc.

磨頭、研體支座和離合器互成120°均勻地安裝在轉座上，轉座的軸承中，在底座正面裝有接料支板及電器，左方裝有電機。當離合器接通時，電機通過皮帶輪，齒輪軸，萬向節帶動磨頭旋轉。齒輪軸的另一頭和研缽支座的齒輪嚙合。由于研棒的正轉和研缽的同向自轉產生相對滑動，借磨頭的自重產生壓力磨細物料。

Grinding head, mortar support and clutch are evenly installed on the rotating seat and in the bearing of rotating seat, at an angle of 120°between each two of them. On the front of the base are mounted receiving support plate and electrical equipment; on its left is installed a motor. When the clutches are connected, the motor drives the rotation of the grinding head through the belt pulley, gear shaft, and cardan joint. The other end of gear shaft and the gear of mortar supportengage. Since relative sliding occurs due to clockwise rotation of grinding bar and clockwise rotation of mortar, the materials are grinded through the weight of grinding head.

離合器是常閉干式磨擦離合器。

See Figure for clutch which is normally closed dry friction clutch.

磨擦離合器的結合和脫開是靠杠桿繞支釘的上下擺動實現的，杠桿上抬時，彈簧被壓縮，磨擦片與齒輪脫開。杠桿下移時，彈簧復位，磨擦片與齒輪端面貼面貼合，從而傳遞動力。

The matching and separation of friction clutch are realized through the up-and-down movement of lever around the support pin. When the lever is lifted up, the spring is compressed and the friction plate and gear are separated. When the lever is lowered down, the spring returns to its original position, and the friction plate matches the end face of gear so as to be able to transfer power.

杠桿的上下移動靠操縱手柄實現。手柄在圖示右邊時，離合器貼合，逆時針旋轉到左邊時，裝在轉盤里的軸靠偏心作用推動銷子，頂起杠桿的調節螺絲，杠桿向上擺動，將離合器脫開。在使用過程中，當磨擦損時，可松開螺帽，向下調節調整螺絲。

The up and down movement of lever is realized through the control handle. When the handle is on the right as is shown in the figure, the clutches match and rotate to the left counterclockwise. The shaft in the rotating disk drives the dowel through eccentric action and jack up the adjusting screw of lever, the lever upswings and separates the clutch. In case of damage by rubbing during the application process, loosen the nuts and adjust the screws downward.

由于每一對研具都有單獨的離合器操作，因此三對研具的運動互不影響，即可同時工作，也可使其中一對或二對工作。

As every pair of lapper is equipped with independent clutch, the three pairs of lappers move independently of each other. That is to say, all of them can operate simultaneously or operate in one pair and two pairs.

磨頭結構見，當動力由離合器萬向節傳來時，由錐齒輪軸，錐齒輪帶動軸旋轉，由于偏心作用，軸帶動軸承座及其上的研棒座，研棒繞軸作旋轉運動。

See Figure for the structure of grinding head. When the power is transmitted from the cardan joint of clutch, the bevel gear shaft and bevel gear drive the rotation of shafts. Under eccentric action, the shafts drive the bearing pedestal and the grinding bar base above it. The grinding bar revolves around the shaft.

磨頭壓力的調節是靠調節盤簧的松緊來實現的。

The pressure of grinding head is adjusted through the adjustment of the tension of the coil spring.

由于旋轉臂兩側裝有兩根軸，這兩根軸分別裝在軸承座的軸承上，固定在座蓋，因此旋轉臂可繞軸的軸心線旋轉，為了調整磨頭壓力，在左右軸承座的外側均裝有一根盤簧它的一端上，另一端卡在軸上。當松開半園頭螺釘，如果朝著研磨中心離開方向旋轉蓋，則盤簧收緊，磨頭的壓力可適當減少，反之，則磨頭的壓力可適當增加。用戶可根據不同研磨對象自行調整，出廠時盤簧調整到減輕磨頭壓力的狀態。

Since on the two sides of the rotary arm are two shafts which are installed on the bearings of bearing pedestal and fixed on the seat cover, the rotary arm can revolve around the axis line of shafts. To adjust the pressure of grinding head, on the outside of the left and right bearing pedestals coil spring is added to one end of it. The other end of it is clipped on the shaft If it moves toward the grinding center to leave the swiveling cover when the half round screws are loosened, the coil spring tightens up. The pressure of grinding pressure can be reduced properly. Otherwise, the pressure of grinding pressure can be increased properly. The user can adjust its pressure according to the grinding object. When it is ready for shipment, the coil spring shall be adjusted to the condition of reduced grinding head pressure.

研缽支座的結構，當動力由齒輪傳來時，摩擦輪帶動摩擦環，從而使研缽旋轉。另外軸承座通過軸鉸接于研缽支座橫孔中，當抬起磨頭，取下缽罩，操縱手柄，則研缽隨同軸承座繞軸旋轉，以便倒也已磨好的物料。

See Figure for the structure of mortar support. When the power is transmitted from the gear, the friction wheel drives the friction ring so as to get the mortar to rotate. In addition, the bearing pedestal is hinged to the cross-drilled holes of mortar support through shafts. When the grinding head is lifted up, and the mortar cover and the control handle are dismounted, the mortar revolves around the shaft along with the bearing pedestal (03-1), to handle the already grinded materials.

定位器的結構，輕輕按一下手柄套，軸承座從轉盤的定位槽中退出，以便換位，當轉盤轉到所需位置時，軸承座嵌入轉盤槽中實現換位。

See Figure for the structure of localizer. Press the handle sleeve gently and the bearing pedestal gets out of the locating slot of the rotating disk to change position. When the rotating disk rotates to the required position, the bearing pedestal is embedded into the locating slot of the rotation disk to realize change of position.

平時操作者一般坐在設備正面接料架處，操縱開關，離合器手柄和定位手柄即可對三對研具依次進行操作。

Generally, the operator sits on the receiving material shelf on the front of the equipment. The three pairs of lappers can be operated in sequence if the switch, clutch handle, and locating handle are controlled.

為了適應磨細多種物料的要求，三對研具間設有隔板，以防樣品互相混雜。

To grind various kinds of materials, clapboards are installed among the three pairs of lappers to avoid mixing of samples.