CN105386039B - A kind of pressuring flat device for being used to adjust the preset powder layer thickness of laser melting coating - Google Patents
A kind of pressuring flat device for being used to adjust the preset powder layer thickness of laser melting coating Download PDFInfo
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- CN105386039B CN105386039B CN201510779296.6A CN201510779296A CN105386039B CN 105386039 B CN105386039 B CN 105386039B CN 201510779296 A CN201510779296 A CN 201510779296A CN 105386039 B CN105386039 B CN 105386039B
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- 239000000843 powder Substances 0.000 title claims abstract description 41
- 239000011248 coating agent Substances 0.000 title description 8
- 238000000576 coating method Methods 0.000 title description 8
- 230000008018 melting Effects 0.000 title 1
- 238000002844 melting Methods 0.000 title 1
- 238000004372 laser cladding Methods 0.000 claims abstract description 12
- 210000004907 gland Anatomy 0.000 claims description 20
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003892 spreading Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
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- Organic Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
本发明涉及一种用于调节激光熔覆预置粉层厚度的压平装置，属于工装夹具设计领域。一种用于调节激光熔覆预置粉层厚度的压平装置，包括门框形支架，其顶部横梁的中心开有螺纹孔，以螺纹孔圆心为中心分布有刻度线，门框形支架一侧竖板上具有刻度尺；在门框形支架内安装有底座，底座上沿与刻度线下沿对齐；在底座上方的门框形支架内装有与顶部设有标记刻线的螺杆相连的压模，螺杆的顶部自门框形支架的螺纹孔中伸出，将压模固定在门框形支架内；旋转螺杆可带动压模沿门框形支架作上下移动，并根据标记刻线和压模底端在刻度尺的位置可以确定压模和底座间的距离。本发明具有体积小、易于携带而且能够精确调节压模和底座间距并达到冷压效果等特点。
The invention relates to a flattening device for adjusting the thickness of a laser cladding preset powder layer, which belongs to the field of fixture design. A flattening device for adjusting the thickness of the laser cladding preset powder layer. There is a scale on the board; a base is installed in the door frame-shaped bracket, and the upper edge of the base is aligned with the lower edge of the scale line; the door frame-shaped bracket above the base is equipped with a die connected to the screw rod with a marking line on the top, and the screw rod The top protrudes from the threaded hole of the door frame-shaped bracket, and fixes the die in the door frame-shaped bracket; the rotating screw can drive the die to move up and down along the door frame-shaped support, and according to the marked line and the bottom end of the die on the scale The position determines the distance between the die and the base. The invention has the characteristics of small size, easy to carry, can precisely adjust the distance between the die and the base, and can achieve the effect of cold pressing.
Description
技术领域technical field
本发明涉及工装夹具/模具的设计领域，特别涉及一种用于调节激光熔覆预置粉层厚度的压平装置。The invention relates to the field of tooling/mold design, in particular to a flattening device for adjusting the thickness of a laser cladding preset powder layer.
背景技术Background technique
激光熔覆技术是利用高能密度激光束将具有不同成份、性能的合金与基材表面快速熔化，在基材表面形成与基材具有完全不同成份和性能的合金层的快速凝固过程，是一种重要的激光表面改性技术。该技术常用的供粉方是将混合好的粉末预置在试样表面，主要包括直接预置，冷压预置，粘接预置，喷涂预置等方法。直接预置可以通过预制凹槽控制预置粉层厚度，但因粉体中含有较多的空气，因此涂层中易形成气孔、氮化物和氧化物等杂质；冷压预置是用压力机将粉体压成一定厚度的片状，可以排除粉体中的大部分气体，提高涂层质量，但预置粉片的厚度受粉体流动性影响，常存在厚度不均匀现象；粘结预置是用粘结剂将粉体调制呈糊状，在涂刷在基体表面烘烤后进行熔覆，粘结剂的存在会影响涂层的质量，而预置厚度均匀性受涂刷技术影响较大；喷涂预置需要在喷涂机进行喷涂预置，成本较高。Laser cladding technology is a rapid solidification process that uses a high-energy-density laser beam to rapidly melt alloys with different compositions and properties on the surface of the substrate, and form an alloy layer on the surface of the substrate that has completely different compositions and properties from the substrate. Important laser surface modification technology. The powder supply method commonly used in this technology is to pre-place the mixed powder on the surface of the sample, mainly including direct pre-preparation, cold-press pre-preposition, bonding pre-preposition, spray pre-preparation and other methods. Direct preset can control the thickness of the preset powder layer through the prefabricated groove, but because the powder contains more air, impurities such as pores, nitrides and oxides are easy to form in the coating; cold press preset is to use a press Pressing the powder into a sheet with a certain thickness can remove most of the gas in the powder and improve the coating quality, but the thickness of the preset powder sheet is affected by the fluidity of the powder, and there is often an uneven thickness; The setting is to use a binder to prepare the powder into a paste, and then cladding is carried out after baking on the surface of the substrate. The existence of the binder will affect the quality of the coating, and the uniformity of the preset thickness is affected by the brushing technology. Larger; the spraying preset needs to be sprayed on the sprayer, and the cost is high.
预置粉层的铺粉工艺一般为手工铺粉，存在铺粉厚度的均匀性，一致性难以保证的缺点。目前采用的多是用油压机将试样表面压平，但该方法往往采用专门的机械设备，同时产生的压力较大，会使试样及粉体产生很大的变形量。The powder spreading process of the preset powder layer is generally manual powder spreading, which has the disadvantage of being difficult to guarantee the uniformity of the powder spreading thickness and consistency. At present, the surface of the sample is mostly flattened by a hydraulic press, but this method often uses special mechanical equipment, and the pressure generated at the same time is relatively high, which will cause a large amount of deformation of the sample and powder.
发明内容Contents of the invention
本发明的目的在于针对上述问题，提供了一种用于调节激光熔覆预置粉层厚度的压平装置，具有体积小、易于携带而且能够达到冷压效果等特点。The purpose of the present invention is to solve the above problems and provide a flattening device for adjusting the thickness of the laser cladding preset powder layer, which has the characteristics of small size, easy to carry and can achieve cold pressing effect.
本发明的目的是这样实现的：The purpose of the present invention is achieved like this:
一种用于调节激光熔覆预置粉层厚度的压平装置，其特征在于，包括门框形支架、底座、压模和螺杆；A flattening device for adjusting the thickness of a laser cladding preset powder layer, characterized in that it includes a door frame-shaped support, a base, a die and a screw;
所述门框形支架的顶部横梁的中心开有螺纹孔，螺纹孔周围刻有以螺纹孔圆心为中心的20条刻度线，两侧的竖板上开有对称且开口相对的竖直滑槽，其中一侧竖板上与竖直滑槽相邻的一侧面上刻有最小刻度1mm且总长20mm的刻度尺；The center of the top beam of the door frame-shaped support has a threaded hole, and 20 scale lines centered on the center of the threaded hole are engraved around the threaded hole, and the vertical plates on both sides are provided with symmetrical vertical chutes with opposite openings. A scale with a minimum scale of 1 mm and a total length of 20 mm is engraved on one side of the vertical plate adjacent to the vertical chute;
所述底座安装在门框形支架内，底座的底面与门框形支架的底面齐平，上平面与刻度尺的底端对齐；The base is installed in the door frame-shaped support, the bottom surface of the base is flush with the bottom surface of the door frame-shaped support, and the upper plane is aligned with the bottom end of the scale;
所述压模包括下模和盖合在下模上的压盖，所述压盖的顶部中心开有可供螺杆穿过的通孔，所述下模自其侧壁向外水平凸伸出一对对称的滑块；The compression mold includes a lower mold and a gland covered on the lower mold, the top center of the gland is provided with a through hole for the screw to pass through, and the lower mold protrudes horizontally outward from its side wall. Symmetrical sliders;
所述螺杆的底部设有直径大于压盖上通孔直径的压头，其顶部刻有标记刻线，螺杆上的外螺纹与螺纹孔的内螺纹相匹配；The bottom of the screw is provided with a pressure head with a diameter larger than the diameter of the through hole on the gland, and the top is engraved with a marking line, and the external thread on the screw matches the internal thread of the threaded hole;
所述下模上的一对滑块嵌入门框形支架的竖直滑槽内，螺杆的压头放置在下模上，通过压盖与下模的盖合将螺杆固定在下模上，螺杆依次自压盖的通孔和门框形支架的螺纹孔中伸出，将压模固定在底座上方的门框形支架内；螺杆通过在螺纹孔中的旋转进行上下移动，进而带动压模沿门框形支架的竖直滑槽作上下移动。A pair of sliders on the lower mold are embedded in the vertical chute of the door frame-shaped bracket, the pressure head of the screw is placed on the lower mold, and the screw is fixed on the lower mold through the cover of the gland and the lower mold, and the screw is pressed sequentially The through hole of the cover and the threaded hole of the door frame-shaped bracket protrude, and the die is fixed in the door frame-shaped bracket above the base; the screw moves up and down through the rotation in the threaded hole, and then drives the die along the vertical direction of the door frame-shaped bracket. The straight chute moves up and down.
其中，所述压盖将螺杆固定在下模上后，螺杆的压头与压盖之间保留0.1mm的间隙。Wherein, after the gland fixes the screw on the lower die, a gap of 0.1 mm is reserved between the pressure head of the screw and the gland.
其中，所述螺杆伸出螺纹孔的部分装有旋转手柄，所述底座的侧壁上装有固定手柄，通过旋转手柄、固定手柄及螺杆使压模和底座间的试样受压。Wherein, the part of the screw rod protruding from the threaded hole is equipped with a rotating handle, and the side wall of the base is equipped with a fixed handle, and the sample between the die and the base is compressed through the rotating handle, the fixed handle and the screw rod.
其中，本压平装置通过改变螺杆顶部的标记刻线与螺纹孔周围刻度尺的相对位置，并结合门框形支架侧板上的刻度尺调节压模与底座之间的距离。Wherein, the flattening device adjusts the distance between the die and the base by changing the relative position of the marking line on the top of the screw rod and the scale around the threaded hole, and combining the scale on the side plate of the door frame-shaped support.
其中，所述底座自其侧壁凸伸出一对对称的连接块，所述一对连接块对应嵌入门框形支架的一对竖直滑槽内，并通过螺钉与门框形支架进行固连。Wherein, the base protrudes from its side wall with a pair of symmetrical connection blocks, and the pair of connection blocks are correspondingly embedded in a pair of vertical slide grooves of the door frame-shaped bracket, and are fixedly connected with the door frame-shaped bracket by screws.
本发明的有益效果为：The beneficial effects of the present invention are:
1)铺粉厚度可在本装置最大设计厚度内连续可调，精度可达0.1mm甚至更低，有助于分析铺粉厚度与冷压载荷、冷压时间，进而与激光辐射功率、速度等参数之间的关系，实现对铺粉厚度的优化。1) The thickness of the powder coating can be continuously adjusted within the maximum design thickness of the device, and the accuracy can reach 0.1mm or even lower, which is helpful for analyzing the powder coating thickness, cold pressing load, cold pressing time, and further related to laser radiation power, speed, etc. The relationship between the parameters realizes the optimization of the powder coating thickness.
2)本装置可在冷压时限制粉层在基体材料铺粉面上滑动，避免其沿与铺粉面平行的方向滑出压力区，提高了冷压粉层厚度和致密度的均匀性。2) This device can restrict the powder layer from sliding on the powder-spreading surface of the base material during cold pressing, preventing it from sliding out of the pressure zone in a direction parallel to the powder-spreading surface, and improving the uniformity of the thickness and density of the cold-pressed powder layer.
3)本装置可适用于各种底座直径范围内的各类形状尺寸，同时不改变铺粉的精度。3) This device can be applied to various shapes and sizes within the range of various base diameters without changing the accuracy of powder spreading.
4)本装置结构简单，易于操作，适用性强，维护简便，特别是适合实验室的工艺研究实验。4) The device has simple structure, easy operation, strong applicability and easy maintenance, and is especially suitable for laboratory process research experiments.
附图说明Description of drawings
图1是本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2是本发明中门框形支架的正视局部剖面图。Fig. 2 is a front partial cross-sectional view of a door frame-shaped bracket in the present invention.
图3是本发明中门框形支架的侧视剖面图。Fig. 3 is a side sectional view of a door frame-shaped bracket in the present invention.
图4是本发明中底座的俯视局部剖面图。Fig. 4 is a top partial sectional view of the base of the present invention.
图5是本发明中底座的侧视图。Fig. 5 is a side view of the base of the present invention.
图6是本发明中压模的正视剖面图。Fig. 6 is a front sectional view of the die in the present invention.
图7是本发明中压模的俯视图。Fig. 7 is a top view of the stamper in the present invention.
具体实施方式detailed description
下面结合具体实施例和附图，进一步阐述本发明。The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.
如图1所示，一种用于调节激光熔覆预置粉层厚度的压平装置，包括门框形支架1、底座2、压模3和螺杆4。As shown in FIG. 1 , a flattening device for adjusting the thickness of a laser cladding preset powder layer includes a door frame-shaped support 1 , a base 2 , a die 3 and a screw 4 .
如图2和图3所示，门框形支架1的顶部横梁的中心开有螺纹孔11，在螺纹孔11周围刻有以螺纹孔11圆心为中心的20条放射状的刻度线13。门框形支架1两侧的竖板上开有对称且开口相对的竖直滑槽12，其中一侧竖板上与竖直滑槽12相邻的一侧面上刻有最小刻度1mm且总长20mm的刻度尺14。As shown in Fig. 2 and Fig. 3, the center of the top crossbeam of doorframe-shaped support 1 has threaded hole 11, engraves 20 radial scale marks 13 centered on threaded hole 11 circle centers around threaded hole 11. The vertical plates on both sides of the door frame-shaped support 1 are provided with symmetrical vertical chute 12 with opposite openings, and the side surface adjacent to the vertical chute 12 on one side of the vertical plate is engraved with a minimum scale of 1 mm and a total length of 20 mm. scale14.
如图6和图7所示，底座2自其侧壁凸伸出一对对称的连接块21，所述一对连接块21对应嵌入门框形支架1的一对竖直滑槽12内，并通过螺钉与门框形支架1进行固连。底座2安装在门框形支架1内后，其底面与门框形支架1的底面齐平，上平面与刻度尺14的底端对齐。As shown in Fig. 6 and Fig. 7, a pair of symmetrical connection blocks 21 protrude from the side wall of the base 2, and the pair of connection blocks 21 are correspondingly embedded in a pair of vertical slide grooves 12 of the door frame-shaped bracket 1, and Be fixedly connected with the door frame-shaped support 1 by screws. After the base 2 was installed in the doorframe-shaped support 1, its bottom surface was flush with the bottom surface of the doorframe-shaped support 1, and the upper plane was aligned with the bottom of the scale 14.
如图4和图5所示，压模3包括下模31和盖合在下模31上的压盖32，所述压盖32的顶部中心开有可供螺杆4穿过的通孔321，所述下模31自其侧壁向外水平凸伸出一对对称的滑块311。螺杆4的底部设有直径大于压盖32上通孔321直径的压头41，其顶部刻有标记刻线42，螺杆4上的外螺纹与螺纹孔11的内螺纹相匹配。As shown in Fig. 4 and Fig. 5, the die 3 includes a lower die 31 and a gland 32 covered on the lower die 31, the top center of the gland 32 has a through hole 321 for the screw 4 to pass through, so A pair of symmetrical sliding blocks 311 protrude horizontally outward from the side wall of the lower mold 31 . The bottom of the screw rod 4 is provided with a pressure head 41 whose diameter is greater than that of the through hole 321 on the gland 32, and the top is engraved with a marking line 42, and the external thread on the screw rod 4 matches the internal thread of the threaded hole 11.
下模31上的一对滑块311嵌入门框形支架1的竖直滑槽12内，螺杆4的压头41放置在下模31上，通过压盖32与下模31的盖合将螺杆4固定在下模31上，螺杆4依次自压盖32的通孔321和门框形支架1的螺纹孔11中伸出，将压模3固定在底座2上方的门框形支架1内。螺杆4通过在螺纹孔11中的旋转进行上下移动，进而带动压模3沿门框形支架1的竖直滑槽12作上下移动。本装置通过改变螺杆4顶部的标记刻线42与螺纹孔11周围刻度线13的相对位置，并结合门框形支架1侧板上的刻度尺14调节压模3与底座2之间的距离。A pair of sliders 311 on the lower mold 31 are embedded in the vertical chute 12 of the door frame-shaped bracket 1, the indenter 41 of the screw rod 4 is placed on the lower mold 31, and the screw rod 4 is fixed by the cover of the gland 32 and the lower mold 31 On the lower die 31 , the screw rod 4 protrudes from the through hole 321 of the gland 32 and the threaded hole 11 of the door frame-shaped support 1 in turn, and the die 3 is fixed in the door frame-shaped support 1 above the base 2 . The screw rod 4 moves up and down by the rotation in the threaded hole 11, and then drives the die 3 to move up and down along the vertical chute 12 of the door frame-shaped support 1. This device adjusts the distance between the die 3 and the base 2 by changing the relative position of the marked scale line 42 on the top of the screw rod 4 and the scale line 13 around the threaded hole 11, and in conjunction with the scale 14 on the side plate of the door frame-shaped support 1 .
为了使螺杆4的压头可在压模内自由旋转，在压盖32将螺杆4固定在下模31上后，螺杆4的压头41与压盖32之间保留0.1mm的间隙。In order to make the pressure head of the screw rod 4 freely rotate in the die, after the screw rod 4 is fixed on the lower die 31 by the gland 32, a gap of 0.1 mm is reserved between the pressure head 41 of the screw rod 4 and the gland 32.
为方便对试样进行施压，本装置在螺杆4伸出螺纹孔11的部分装有旋转手柄5，在底座2的侧壁上装有固定手柄6，通过旋转手柄5、固定手柄6及螺杆4使压模和底座间的试样受压。For the convenience of applying pressure to the sample, the device is equipped with a rotating handle 5 at the part where the screw rod 4 protrudes from the threaded hole 11, and a fixed handle 6 is installed on the side wall of the base 2, through the rotating handle 5, the fixed handle 6 and the screw rod 4 Compress the specimen between the die and the base.
本装置使用前，通过旋转螺杆4将压模3调整到门框形支架1内的顶端位置。Before the device is used, the die 3 is adjusted to the top position in the door frame-shaped support 1 by rotating the screw rod 4 .
使用时，在基体试样表面预置粉层，粉层厚度略高于要求的厚度，然后将基体试样置于底座2上，并通过固定手柄6将底座进行固定；接着，通过旋转手柄5转动螺杆4，使压模3向下移动，通过观察门框形支架1竖板侧面的刻度尺14和螺杆4顶部的标记刻线42的位置，使压模3下降至指定位置将试样表面压实，即可得到所要求厚度的平整粉层。When in use, a powder layer is preset on the surface of the matrix sample, the thickness of the powder layer is slightly higher than the required thickness, then the matrix sample is placed on the base 2, and the base is fixed by the fixed handle 6; then, by rotating the handle 5 Rotate the screw 4 to move the die 3 downwards. By observing the position of the scale 14 on the side of the vertical plate of the doorframe-shaped support 1 and the position of the marking line 42 on the top of the screw 4, the die 3 is lowered to the designated position to press the surface of the sample. In practice, a flat powder layer with the required thickness can be obtained.
本装置中，铺粉厚度的精度由螺杆4的螺距决定。而铺粉厚度的控制通过将螺杆4旋转适当的角度实现，铺粉厚度在最大厚度之内连续可调。铺粉最大厚度取决于螺杆4上的螺纹长度、门框形支架1中顶部横梁的高度以及基体试样的厚度。In this device, the precision of powder spreading thickness is determined by the pitch of screw rod 4. The control of the powder spreading thickness is realized by rotating the screw rod 4 at an appropriate angle, and the powder spreading thickness is continuously adjustable within the maximum thickness. The maximum powder coating thickness depends on the thread length on the screw rod 4, the height of the top beam in the door frame-shaped support 1 and the thickness of the substrate sample.
本装置中，门框形支架1顶部的螺纹孔周围360°设有20根刻度线13，这样螺杆4顶部的标记刻线42每旋转一个单位刻度，压模则移动0.05mm，根据螺杆4顶部的标记刻线42和门框形支架1顶部横梁上的刻度线13的相对位置，再结合门框形支架1竖板侧面的刻度尺14可以估算出下模31与底座2之间的距离。In this device, 20 scale lines 13 are arranged at 360° around the threaded hole at the top of the doorframe-shaped support 1, so that the marking line 42 on the top of the screw rod 4 rotates a unit scale, and the die moves 0.05 mm. Mark the relative positions of the scale line 42 and the scale line 13 on the top beam of the door frame-shaped support 1, and then combine the scale 14 on the side of the vertical plate of the door frame-shaped support 1 to estimate the distance between the lower mold 31 and the base 2.
这里，再以欲在直径50mm，厚度10mm的圆片状试样上预置厚度为1±0.1mm的金属粉末为例，对本装置的使用作进一步说明。首先将试样置于底座2上，通过旋转手柄5旋转螺杆4，使压模3中的下模接触试样的上表面，记录下标记刻线42与门框形支架1顶部横梁上的刻度线13的相对位置。接着，反向旋转螺杆4，使标记刻线42旋转两周后，取下试样，将粉末混合后涂于试样表面，其厚度控制在1.5mm左右，并将试样再次置于底座2之上。然后，再次旋转螺杆4，旋转方向同首次，使标记刻线42旋转一周后再旋转门框形支架1顶部横梁上的刻度线13标记的二个刻度单位，考虑螺杆4底部的压头41与压盖32间留有0.1mm间隙，在静止干燥后反向旋转螺杆4抬高压头41，即可得到厚度1±0.1mm的平整粉末层。Here, the use of this device will be further described by taking the example of presetting metal powder with a thickness of 1±0.1mm on a disc-shaped sample with a diameter of 50mm and a thickness of 10mm. First place the sample on the base 2, rotate the screw 4 by rotating the handle 5, make the lower mold in the die 3 contact the upper surface of the sample, record the marking line 42 and the scale line on the top beam of the door frame-shaped support 1 13 relative positions. Next, reversely rotate the screw 4 to rotate the marking line 42 for two weeks, remove the sample, mix the powder and apply it on the surface of the sample, the thickness of which is controlled at about 1.5 mm, and place the sample on the base 2 again. above. Then, the screw rod 4 is rotated again, and the direction of rotation is the same as the first time, so that the marked scale line 42 is rotated for one circle, and then the two scale units of the scale line 13 mark on the top beam of the door frame support 1 are rotated, considering the pressure head 41 and the pressure head at the bottom of the screw rod 4 A gap of 0.1mm is left between the covers 32, and after static drying, the screw 4 is reversely rotated to raise the pressure head 41, and a flat powder layer with a thickness of 1±0.1mm can be obtained.
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