KR101857721B1 - Manufacturing method of screw apparatus - Google Patents

Manufacturing method of screw apparatus Download PDF

Info

Publication number
KR101857721B1
KR101857721B1 KR1020170086613A KR20170086613A KR101857721B1 KR 101857721 B1 KR101857721 B1 KR 101857721B1 KR 1020170086613 A KR1020170086613 A KR 1020170086613A KR 20170086613 A KR20170086613 A KR 20170086613A KR 101857721 B1 KR101857721 B1 KR 101857721B1
Authority
KR
South Korea
Prior art keywords
screw
cemented carbide
screw blade
pieces
hole
Prior art date
Application number
KR1020170086613A
Other languages
Korean (ko)
Inventor
김동환
김현
Original Assignee
한국환경기계 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 한국환경기계 주식회사 filed Critical 한국환경기계 주식회사
Priority to KR1020170086613A priority Critical patent/KR101857721B1/en
Application granted granted Critical
Publication of KR101857721B1 publication Critical patent/KR101857721B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K5/00—Gas flame welding
    • B23K5/006—Gas flame welding specially adapted for particular articles or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K5/00—Gas flame welding
    • B23K5/12—Gas flame welding taking account of the properties of the material to be welded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/26—Screws
    • B65G33/265—Screws with a continuous helical surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2812/00—Indexing codes relating to the kind or type of conveyors
    • B65G2812/05—Screw-conveyors
    • B65G2812/0505—Driving means, constitutive elements or auxiliary devices
    • B65G2812/0511—Conveyor screws
    • B65G2812/0527—Conveyor screws characterised by the configuration, e.g. hollow, toothed

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Centrifugal Separators (AREA)

Abstract

The present invention relates to a manufacturing method of a cemented carbide piece to be attached to the entire surface of a screw blade in a screw device requiring wear resistance and a screw device manufactured by the method, and a tapered, A hardened piece having at least two holes is placed on a screw blade and the bottom of the hole is subjected to brazing welding so that the welded piece is filled with the gap space without a gap, resulting in a protrusion of a wider outer side in the screw blade. And a through hole to be engaged with a hole of a hard carburetor is formed in a screw blade so that a rivet member having a head is inserted into the two holes, and a rivet tail portion and a screw As a method for welding and coupling wings and a screw device using the method, It will be able to get the economic effects compared to the braze welding.

Description

[0001] The present invention relates to a manufacturing method of a screw apparatus,

 The present invention relates to a method of bonding a cemented carbide piece to a surface of a screw in a screw apparatus requiring abrasion resistance, such as a screw conveyor for handling abrasive materials such as sand.

In order to improve the abrasion resistance of the screw blade, which is the core of the screw device using a screw, such as a screw conveyor, the whole surface brazing method is mainly used as a technique of applying the hard blade to the surface of the screw blade have. This is a method in which a silver or silver braze filler is melted and bonded over the entire surface to be bonded, and the base material, the filler and the material to be bonded are simultaneously heated and bonded. This brazing technique is suitable for one-time bonding of a small object such as a copper tube or a bite-tip joint, and there are some problems in applying the welding method to the continuous bonding method of the carbide as in the present invention.

First, as a problem with the continuous operation, when one carbide piece is bonded to a screw blade and then another carbide piece is welded to a position where the carbide piece and the side face are almost attached to each other, Since there is a problem that the joint part of the piece melts down on the road, there is an inconvenience and an uneconomical factor that it is necessary to wait for a long time until the natural cooling is performed in order to weld the carbide piece to the adjacent position after welding.

Secondly, as a problem related to the complexity of the work, it is necessary to separately heat the base material (screw blade) and the cemented carbide element, and then heat the cemented carbide piece by melting the same again after heating the base material (brass lead or silver) The complicated procedure is necessary to place on the melted soluble agent.

Third, it relates to welding in an inclined curved surface, which is a problem that occurs when a curved screw blade is welded to a screw shaft and a hardened piece is to be welded to a screw blade.

That is, in order to prevent the molten solder from flowing in the welding process, it is necessary to adjust the bonding surface as close as possible to the horizontal plane. Therefore, it is inconvenient to adjust the angle by moving the screw device one by one.

Fourth, since carbide is low in toughness, it is susceptible to crack at high temperatures, so it is difficult to weld brazing when stainless steel is used as the base material because it avoids electric arc or argon welding which is a high temperature welding and relatively low temperature welding method. There is a problem in that the material of the steel is changed with an easy steel so that the hard metal pieces are welded thereto.

As shown in the above-mentioned prior arts, it is possible to overcome the above-mentioned problems in the case of attaching a plurality of hardened pieces to a screw blade, thereby reducing the welding cost and welding time to maximize the economical efficiency. Particularly, The welding is to find means capable of welding without changing the material.

A method of manufacturing a screw device according to the present invention is a method of manufacturing a screw device mounted inside a cylinder having an inlet at one end thereof and an outlet at the other end thereof and mounted concentrically with the cylinder, A screw vane formed on an outer circumferential surface of the screw shaft so as to push the object to be introduced from the inlet of the cylinder as the screw shaft rotates and to move the object toward the outlet, And a plurality of cemented carbide pieces of a cemented carbide material having a hardness higher than that of the screw blades, the plurality of carbide pieces being continuously joined along an outer arc gland of the front surface, Wherein each of the cemented carbide pieces has a shape in which a small fan-shaped portion is removed from a central portion in a fan shape, Wherein at least two taper holes penetrating the outer surface of the bonding surface are provided, wherein each of the taper holes has an area of a hole portion formed in the bonding surface smaller than an area of a hole portion formed in the outer surface A method of manufacturing a screw device having a tapered shape, the method comprising: providing a screw shaft to which the screw blade is coupled; A horizontal preparation step of positioning the screw blade so as to position the screw blade so that the front surface of the screw blade to be engaged with one hard blade is horizontal; A cemented carbide laying step of placing the outer edge of the one cemented carbide facing the outer surface of the screw vane so that the one cemented carbide attachment surface is in contact with the front surface of the screw vane; A preheating step of heating a front surface of the screw blade, which is an inner bottom surface of the one tapered hole of the cemented carbide, through a taper hole space with a welder; A welding step of inserting a filler into the heated taper hole and heating the welded part with a welding machine to weld a front surface of the screw blade which is the bottom surface of the taper hole and to fill the taper hole with the welding wire; A cooling step of cooling the welding heat after the welding step and attaching the one hard metal piece to the screw blade; And repeatedly performing the horizontal preparing step, the hard metal laying step, the preheating step, the welding step, and the cooling step in order to allow the cemented carbide pieces to be continuously attached along the outer line of the front surface of the screw vane .

The one cemented carbide is a first cemented carbide, and the repeating step is performed by rotating the screw shaft with the screw vane attached thereto so that the distance between the first cemented carbide and the center arc of the first cemented carbide is three times To be positioned lower than the first step; A horizontal preparation step of sequentially positioning the second, third and fourth cemented carbide pieces, which are the other cemented carbide pieces, so as to be in contact with the side surface of the attached first cemented carbide, and positioning the fourth cemented carbide pieces horizontally; A cemented carbide laying step of placing the outer surfaces of the cemented carbides of the second, third and fourth cemented carbons in contact with the outer surfaces of the screw vanes; An additional attaching step of attaching the second, third and fourth cemented carbide pieces in a bundle, sequentially performing the preheating step, the welding step and the cooling step to attach the second, third and fourth cemented carbide pieces at a time; .

According to another aspect of the present invention, there is provided a method of manufacturing a screw device, which is mounted inside a cylinder having an inlet at one end and an outlet at the other end, the screw device being mounted concentrically with the cylinder A screw shaft formed on the outer circumferential surface of the screw shaft and coupled to move the object to be introduced from the inlet of the cylinder toward the outlet as the screw shaft rotates; A plurality of cemented carbide pieces of a cemented carbide material having a hardness higher than that of the screw blades, a plurality of which are continuously joined along outer arc glands on the front surface of the wing, Wherein each of the cemented carbide pieces has a shape in which a small fan-shaped portion is removed from a central portion in a fan shape, and is attached to the screw blade Wherein at least two tapered holes penetrating the outer surface of the bonding surface are provided, and each of the tapered holes has an area of a hole portion formed in the bonding surface, A method of manufacturing a screw device having a taper shape that is smaller than an area of a portion of the tapered portion is characterized in that the screw vane is prepared and the tapered hole formed in the cemented carbide portion Preparing a screw blade having a through hole having the same size as the diameter of the hole portion formed in the bonding surface of the carbide tip; Coupling the screw vane to a screw shaft; A screw blade positioning step of positioning the screw blade so that the screw blade is positioned such that the front surface of the screw blade to be engaged with one hard blade is directed downward; A taper hole of one of the cemented carbide and a through hole of the screw blade is made to communicate with the outside line of the front surface of the screw blade, and then a rivet member having a plate-shaped head and a cylindrical tail is inserted into the taper hole Inserting the tail portion into the through hole and temporarily fixing the cemented piece to the outside line of the front surface of the screw blade using a jig; A welding step of welding the tail portion of the rivet member at a rear surface opposite to the front surface of the screw blade to fit the cemented carbide to the outside line of the front surface of the screw blade; And an iterative step of repeating the cemented carbide placement and fixing step and the welding step so that the cemented carbide pieces can be continuously attached along the outer line of the front surface of the screw vane.

Preferably, the step of arranging the cemented carbide pieces includes disposing the at least two cemented carbide pieces such that the side faces thereof face each other.

The above-mentioned solution means are described as follows.

As a first solution of the present invention,

In a screw device (6) provided inside a cylinder and welded to a screw shaft (3) having a concentric axis with a screw blade (2) having a pitch of at least one pitch, a screw device A cemented carbide piece 1 is continuously attached to the front surface of the screw blade 2 and a hole whose sectional area of the outer surface is tapered to be wider than that of the inner surface The hardened pieces 1 of at least two formed fan-shaped pieces are aligned with each other, and the bottom of the holes is intensively heated by an oxygen welder. Then, a filler is put into the holes of the hardened piece and melted, The welding fingers 4 welded to the blades 2 fill the holes with no gaps so that the tapered protruding bar in the outer light made of the welding fingers 4 has the effect of holding and fixing the hardened pieces 1. [ A plurality of microcapsules (1) (2), and a screw device (6) manufactured by applying this method.

As a second solution of the present invention,

In a screw device (6) provided inside a cylinder and welded to a screw shaft (3) having a concentric axis with a screw blade (2) having a pitch of at least one pitch, a screw device A cemented carbide piece 1 is continuously attached to the front surface of the screw blade 2 and a hole whose sectional area of the outer surface is tapered to be wider than that of the inner surface (1) having at least two formed fan-paper-like shapes and a screw blade (2) which is in contact with the hole of the above-mentioned hardened piece (1) The diameter and the length of the tail portion 52 are set to be the same as the diameter of the through hole 21 and the diameter and length of the tail portion 52 of the through hole 21, A rivet member (5) is inserted into the hole from the outer surface side of the hardened piece (1) The rivet tail portion 52 is brought into contact with the through hole 21 of the screw blade 2 and the rivet tail portion 52 is inserted into the hole of the hardened piece 1 from the rear surface of the screw blade 2, (2) and a cemented carbide (1), characterized in that the screw blade (2) and the screw blade (2) are welded to each other and a screw device (6) manufactured by applying this method.

Further, by applying the above solution,

A cylinder 73 having an inlet 71 on one side and an outlet 72 on the opposite side and a screw device 6 comprising a screw shaft 3 and a screw blade 2 A screw conveyor 7 which is coupled to the side surface of the cylinder 73 using bearings 74 at both ends of the shaft 3 and rotates the screw device 6 by the electric motor 75 to transfer the material, , Characterized in that the screw device (6) is constituted by any one of the first or second solution means.

Further, with another apparatus to which the above solution is applied,

An outer cylinder cylinder 83 in which a cylinder and a frustum are concentrically coupled and has a plurality of annular orifices on a side of the cylinder, a hollow screw shaft 3 and a screw blade 2 welded to the shaft, (81) of the hollow screw shaft (3) protruding out through a bearing (84) at the center of the orifice side plate and a sand outlet 82 on the opposite side of the shaft The mixture of the liquid and the sand which has entered the inlet 81 is separated by the centrifugal force and the driving force of the outer cylinder 83 and the screw device 6 which rotate at a high speed with a slight rotation difference, And the sand component is dewatered and discharged to the sand outlet 82 through the orifice and the orifice so that the screw device 6 can be rotated by the first solution means or the second solution means [Means for Solving the Problem] This enhanced screw decanter (8).

As another apparatus to which the above solution is applied,

A porous cylinder 93 having an inlet 91 on one upper surface and a contaminant discharge port 92 on the opposite side and making a part of the space on the contaminant discharge side gradually smaller toward the discharge side; And a screw device 6 composed of a screw blade 2 and a screw press 6 for rotating the screw device 6 with the speed reduction motor 95 and the transmission device 94 to convey the impurities to the screw press 9. The screw press (9) of claim 1, wherein the screw device (6) is constituted by either the first solution means or the second solution means.

The effects of the present invention will be described separately for each solution.

The difference between the conventional brazing method and the method of this solution is confirmed.

First, the work processes of the conventional method are listed in order, so that the screw device 6 is staggered and fixed so that the contact surfaces of the screw blade 2 and the cemented carbide pieces 1 are maximally horizontal. Heat the joint surface of the screw blade (2) closest to the horizontal with an oxygen welder. The carbide pieces 1 are heated separately from each other. Screw blades (2) Place a sizing agent on the joint surface and melt by heating. The heated cemented carbide pieces (1) are placed on the bonding surfaces of the screw blades (2) by aligning the outward lines with the melted filler interposed therebetween and continuously heating the upper surface of the cemented carbide pieces (1). At this time, in order to prevent the movement of the hard metal piece (1), lightly press the hard metal piece (1) with the end of the heat resistant tweezers and take a seat. After the screw device 6 having a sufficient cooling time is fixed, the screw device 6 is fixed so that the next joining surface is close to the horizontal, and then the above-mentioned operation is repeatedly performed one by one.

There are three reasons why the carbide pieces (1) move when the carbide pieces (1) are placed on the molten material. The problem with the curved surface is that the screw blade 2 is a curved surface and the cemented carbide 1 is a curved surface. In this case, The problem of fluidity is that the melted filler (including flux) becomes more active. Particularly, due to the amount of the filler and the unevenness of the temperature of the filler, the filler is not directly fixed and moves.

In the first method of the present invention, the screw device 6 is staggered and fixed so that the joint surfaces of the screw blade 2 and the first hardened piece (first jointed portion) are as horizontal as possible do. Align the cemented carbide (1) with at least two holes to the outside line. The oxygen welder heats the hole bottom intensively. And a filler is inserted into the hole of the hardened piece 1. [ The solvent is dissolved in an oxygen welder and cooled. The screw device 6 is rotated to fix the attached first cemented carbide so that it goes down from the horizontal to a distance of about three carbide pieces (1). The second, third, and fourth cemented carbide pieces 1 are aligned with the outside line of the screw vanes 2 so that the uppermost (fourth) cemented carbide piece is close to the horizontal plane . Next, three (second, third, and fourth) hard metal pieces (1) are heated intensively on the bottom of the hole. Insert the filler into all holes ( 6 pieces) starting from the hole of the second carbide insert and melt it. Finish welding and cooling. The screw device 6 is unfastened, and the screw device is rotated to fix the fourth cemented carbide to the first cemented carbide position. Repeat the above procedure.

To summarize the difference, in the conventional method, the welding surface is the entire bonding surface. However, in the first solution means of the present invention, only the area that comes into contact with the hole of the hardened piece 1 becomes the welding surface. In the heating method, 2) and cemented carbide (1) heat the entire surface separately from each other, but the latter superposes the two and heats only the bottom of the hole intensively, with the greatest effect being that the former is one cemented carbide (1) at a time Welding and cooling should be repeated, but in the latter case, three or four carbide pieces (1) can be combined and work simultaneously. Since carbide is very low in toughness, cracking easily occurs when it is rapidly cooled after welding. Therefore, the cooling time is longer than the bonding time because it is necessary to cool down in an air-cooled manner while avoiding rapid cooling such as water cooling. Therefore, the first solution of the present invention is to reduce the overall cooling standby time to about one-third as compared with the conventional method, and the base material and the material to be bonded are superposed only at the bottom of the hole Since it is necessary to dissolve the filler uniformly in the entire area of the joint surface as much as possible, it requires a lot of time and skill. However, since the first solution of the present invention is to melt only the filler of the carbide tip (1) hole, . The overall working time achieves an economical effect where the first solution of the present invention is only one third of the conventional method.

Table 1 below shows the effects of the first solution of the present invention in comparison with the conventional method.

Base metal, carbide
Heating method A dragon
solution 1 time
work Screw device stocking pincette
work With flux
A dragon work
speed Proficiency Conventional welding method Separate front heating All joint surfaces homogeneous One
Carbide Every 1 carbide Skillful A lot late Be high The welding method of the present invention Concentrated heating only over the hole area Melting in two holes 3 to 4
Carbide Every 3 ~ 4 carbide Unnecessary Take less fast Be low Contrast effect Simplify your work Time saving, no skill required Convenient operation, shortening time Workload reduction,
Save time Simplify your work Economics
increase Promoting economy Promoting economy

As described above, the first solution of the present invention is that the welding method using the hole of the hardened piece 1 is the core, and when the hardened piece is inserted into the hole of the hardened piece 1 to melt it, (1). It is a phenomenon that can not be avoided because the curved surface and plane are served. This phenomenon, however, gives a better effect to the means of the present invention. The melted material that escaped through the gap naturally fills the gap, which helps to increase the adhesion of the two objects. In connection with this work, it has been found that, in the simultaneous attachment method for several hard floss pieces 1, the outermost one of the most inclined hard flaps 1 passes through the slot gap, There may be a problem flowing. However, since the degree of curvature is small in the screw of the screw decanter 8 whose screw pitch is about 1/4 of the screw outer diameter in actual work, even if 5 to 6 pieces of hard metal 1 are used simultaneously as a set, I have found that there are not many problems, and that at the same level of pitch and outer diameter, three simultaneous operations are good. This is because unlike the conventional method, since only the bottom of the hole is concentratedly heated, the temperature of the other surfaces except for the hole portion is not so high, and the flow of the consuming agent is seen as a result of stopping at the level of filling the gap.

Next, the method of the second solution means of the present invention, which is in contrast to the conventional method, will be described as follows.

First, the hardened piece 1 is the same as that of the first means described above, and the screw blade 2 is provided with a through hole 21 to be in contact with a hole of the hardened piece 1 and has a rivet member 5. In the case of working five sets of the hardened pieces 1, first, the screw device 6 is fixed upright so that the contact surfaces of the screw blades 2 and the third hardened pieces are as horizontal as possible. In this case, it is different from the first means that the joint faces are fixed downward. The hardened piece 1 is brought into contact with the lower surface of the screw blade 2 and the rivet member 5 is inserted into the tapered hole of the hardened piece 1 to temporarily clamp the five hardened pieces 1. [ This can be solved simply by using a dedicated fixture. The rivet tail portion 52 and the screw blade 2 are welded on the upper surface of the screw blade 2. First, the screw blade 2 is rotated so that the screw device 6 can be unfastened and the next five pieces of hard metal pieces 1 can be joined together. Repeat the following operation.

In the conventional method, the entire surface of the base material and the object to be welded is the welding surface, but the second solution means of the present invention is that the screw blade (2) and the rivet Only two portions of the tail portion 52 are welded. In the heating method, electrons heat the entire surface of the screw blade 2 and the hardened piece 1 at different positions, but the latter does not require heating at all. Another difference is that the electrons must be welded and cooled one by one (1) at a time, while the latter can be operated simultaneously with a set of about five (5) carbide pieces (1) It is not necessary to have a standby time of. Therefore, the second solution of the present invention is that the welding of the rivet tail portion 52 becomes a main process as compared with the conventional method requiring a lot of time and skill, and does not require much time and proficiency. The overall working time of the present invention is only one tenth of the conventional method of the present invention, and the positive effect such as the usage amount of the solvent, the cost saving related to the heating process, 5), and the processing cost of the through hole (21) of the screw blade (2) are added. However, if the above is taken into consideration, it can be seen that the overall economical effect is more than twice that of the conventional method.

Considering that the through hole 21 and the rivet member 5, which are added elements, can be formed by a cam (CAM), and that the pre-modern welding process in which the workforce is input is greatly reduced, Of the total.

As another effect, since the welded portion is separated from the hardened piece 1 by the thickness distance of the screw blade 2 without heating or welding the hardened piece 1 directly, the hot cracked phenomenon of the hardened piece 1 is equivalent to the The rivet tail portion 52 and the screw blade 2 can be formed by electric arc welding or argon welding (TIG welding) instead of brazing. Especially, if the base material {screw blade (2)} is stainless steel, argon welding is very effective. Conventionally, it is not possible to carry out the welding of the cemented carbide pieces 1 to the stainless steel and the welding of the cemented carbide pieces 1 to the steel material, It is very significant that argon welding with plus elements can be done without replacing materials in all aspects, such as weldability, bonding time, welding cost, and worker's skill, compared with brazing .

In the bonding of the cemented carbide 1 to the screw blade 2 made of stainless steel as described above, the second solution will be most effective in that it can be solved only by argon welding.

Table 2 below shows the effect of the second solution of the present invention in comparison with the conventional method.

Welding method Base material, carbide heating method A dragon
solution One
work Screw device
Stock pincette
work (Flux
include)
A dragon work
speed Proficiency Conventional
Welding method Brazing only Separate location, front
Separate heating All joint surfaces homogeneous One
Carbide Every 1 carbide Skillful A lot of
disturbance late Be high The
Welding method High temperature welding method is also available No heating required Rivets in the tail 5
Carbide Every 5 carbides Unnecessary less
disturbance
fast Be low prepare
effect Wide selection Simplify your work Time saving, no skill required Convenient operation, shortening time Workload
reduction,
Save time Simplify your work Economics
increase Promoting economy Promoting economy Remarks Stainless steel can be changed without changing the material
argon
Weldable effect Stainless steel is free of additives Stainless steel is free of additives

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view of a hard-
Fig. 2 is a cross-sectional view taken along line AA in Fig.
Fig. 3 is a diagram showing the relationship between the hard diameter piece and the screw blade in Fig. 1
Fig. 4 is a perspective view of a screw apparatus according to the present invention,
Fig. 5 is a perspective view of a rivet member stereoscopic view according to another embodiment of the present invention
Fig. 6 is a cross-sectional view of the carbide blade with screw vanes,
Figure 7 is a side view of the screw blade < RTI ID = 0.0 > 1 &
8 is a perspective view of a screw conveyor to which the screw device of the present invention is applied.
9 is a perspective view of a three-dimensional drawing of a screw decanter to which a screw device of the present invention is applied
10 is a three-dimensional view of a screw press to which the screw apparatus of the present invention is applied.

Prior to the concrete description, terms used in the present invention are defined as follows.

1) Screw blades (2) Front surface - A contact surface that pushes the material to be processed and pushes forward, and is a surface where contact resistance and sliding friction act greatly.

2) Screw blades (2) Rear - There is almost no contact resistance on the opposite side of the front.

3) Carbide (1) It is an abbreviation of cemented carbide (hard metal). It is a very hard alloy made by burning metal carbide. It has excellent abrasion resistance. The cemented carbide (1) of the present invention is a cemented carbide piece strictly as a hardened carbide piece.

4) Fan shape The shape of the remaining one that cuts out a small fan-shaped portion of the central part in one sector. That is, the shape of the area corresponding to the paper when the folding fan is opened

5) Outer Fan In the form of paper,

6) Naho - Fan In the shape of the paper,

7) Center arc A virtual arc that passes through the center of the fan paper,

8) Siding line The two outer side lines of the paper type are the distance between the outer and inner horns.

≪ Example 1 >

In connection with the above-mentioned first solution, a plurality of fan-shaped cemented carbide pieces (1) having two holes are provided in the same shape. The size per unit size of the hardened piece 1 varies depending on the degree of curvature of the joint surface of the screw blade 2. Since the joint surface of the hardened piece 1 is flat, but the joint surface of the screw blade 2 is a curved surface, the size of the hardened piece 1 is limited in order to fit the two surfaces. For example, when the diameter of the screw blade 2 is the same as the outer diameter of the screw blade 2, the magnitude of the degree to which 30 hard-tipped pieces 1 are bonded per pitch of the screw blade 2 is appropriate. However, if the degree of warping of the screw blades 2 is as small as 1/4 of the outer diameter of the screw blade 2 of the screw decanter 8, the size of the individual hard metal pieces 1 can be made larger than the former Therefore, the number of carbides per pitch can be reduced to about 20.

Since the abrasion of the screw blades 2 is mainly concentrated on the outer side of the screw blades 2, the outer side of the screw blades 2 and the outer side of the hard blades 1 are engaged with each other. Therefore, the outer radius of the hardened piece 1 is made equal to the outer radius of the developed view per pitch of the screw blade 2. The height (lateral line length) of the cemented carbide pieces 1 varies depending on the application and is usually set to a value obtained by subtracting the radius of the shaft from the radius of the screw blade 2, 3 is appropriate.

And two holes of the same size are symmetrically provided in the center arc of the hardened piece 1. [ The interval of the holes is 60% of the center arc length. The diameter of the hole makes the diameter of the outer hole larger than the diameter of the bonding surface side of the hardened piece 1 to be a tapered hole.

Next, as mentioned in the column of the effect of the invention, the cemented carbide pieces 1, which are provided as described above, are attached to the screw blades 2 and the first cemented carbide pieces (2), so that the screw device (6) is staggered and fixed as much as possible. Align the cemented carbide (1) with at least two holes to the outside line. The oxygen welder heats the hole bottom intensively. And a filler is inserted into the hole of the hardened piece 1. [ The solvent is dissolved in an oxygen welder and cooled. The screw device 6 is rotated to fix the attached first cemented carbide so that it goes down from the horizontal to a distance of about three carbide tips. (Fourth) cemented carbide pieces 1 are placed on the upper side of the attached first cemented carbide pieces so that the second, third, and fourth cemented carbide pieces 1 are aligned with the outside line of the screw vane 2, As close as possible to the horizontal plane. Next, three (second, third, and fourth) hard metal pieces (1) are heated intensively on the bottom of the hole. Starting with the second carbide aperture, Insert it into 6 holes and dissolve it. Finish welding and cooling. The screw device 6 is unfastened, and the screw device 6 is rotated to fix the fourth cemented carbide to the first cemented carbide position. Repeat the above procedure until welding of the joint is completed. (1) The number of carbide pieces of a workpiece can be added or subtracted according to the conditions.

≪ Example 2 >

This is related to the second solving means, and all things relating to the hardened piece 1 are the same as those of the first embodiment. Except that another through hole (21) is formed at the joint surface of the screw blade (2) to be inserted into the hole of the hardened piece (1). The plate head portion 51 has the same angle and size as the taper angle and size of the hole of the hardened piece 1 and has the same number of holes as the rivet member 5 of the same material as the screw blade 2. [ The length of the tail portion (52) of the rivet member (5) is made slightly shorter than the thickness of the screw blade (2).

Here, the through-hole 21 of the joint surface of the screw blade 2 is made the same as the small diameter of the tapered hole of the hardened piece 1. That is, the same diameter holes on both sides are provided on the surface of the screw vanes 2. However, strictly speaking, in practice, it is preferable that the through hole 21 of the screw blade 2 has a plus tolerance slightly larger than the hole of the hardened piece 1 which is in contact with the through hole. This is for the purpose of facilitating the insertion of the rivet member 5 into the hole.

Next, the description of the welding operation will be made as follows. First, as described in the <Effects of the Invention>, the case of working five sets of the hardened pieces 1 is first described. First, The screw device 6 is staggered so that its face is as horizontal as possible and the joint surface faces downward. The cemented carbide pieces 1 are brought into contact with the lower portion of the screw blade 2 and the rivet members 5 are inserted into the tapered holes of the cemented carbide pieces 1 and the five hardened pieces 1 are temporarily clamped. This can be solved simply by using a dedicated fixture. The rivet tail portion 52 and the screw blade 2 are welded on the upper surface of the screw blade 2. The screw device 6 is rotated and reassembled in the first manner so that the screw device 6 can be unfastened and the next five hardened pieces 1 can be joined together. Repeat the following steps in this way. The number of carbide pieces (1) of one set of welding work can be increased or decreased according to the situation.

A slight taper is given to the small diameter end portion of the rivet member 5 so that the diameter becomes smaller toward the end, that is, a little pointed like a nail, the through hole 21 of the screw blade 2 and the rivet tail portion 52 and the welding flesh 4 is inserted into this portion, thereby creating an effect of further increasing the bonding force. This is a means to apply when greater cohesion is needed.

Here, the through hole 21 formed in the joint surface of the screw blade 2 is preferably machined in the form of a plate before the screw blade 2 is formed into a curved surface. It is preferable to select the position of the through hole 21 on the developed view and to process the hole of the cemented carbide 1 to be joined in the developed view for one pitch of the screw blade 2.

On the other hand, in the apparatus to which the screw apparatus of the present invention is applied, it is utilized for strengthening the wear resistance of the screw blades (2).

The first embodiment is applied to the general screw device 6 such as the screw conveyor 7 and the screw feeder for handling the sand and the feed load such as the screw descender 8 or the screw press 9 The screw apparatus 6 is preferably applied to the second embodiment.

As described above, according to the present invention, in the bonding of the hardened piece 1 having poor bonding property, the means for bonding the hardened piece 1 securely and economically to the screw blade 2 by using the tapered hole provided in the hardened piece 1 And a technique that can overcome the conventional method of changing the material to steel in the screw blade 2 of the stainless steel and can adhere the carbide 1 as it is without changing the material ), Which can be widely used in industries requiring continuous joining.

The screw device 6 according to the present invention can be employed in the screw conveyor 7. [ That is, a cylinder 73 having an inlet 71 on one upper surface and a discharge port 72 on the opposite side is provided with a screw device 3, which is composed of a screw shaft 3 and a screw blade 2, A screw conveyor 6 for conveying a material by rotating the screw device 6 with an electric motor 75 is provided on the side of the cylinder 73 by using bearings 74 at both ends of the shaft 3, 7, the screw device 6 according to the present invention is constituted by the screw device 6, thereby realizing the screw conveyor 7 with enhanced wear resistance.

The screw apparatus 6 according to the present invention can also be employed in the screw decanter 8. That is, an outer cylinder 83 having a cylindrical and a frustum coaxially connected and having a plurality of orifices on the side of the cylinder, a hollow screw shaft 3 and a screw blade (not shown) welded to the shaft 2 and a sand inlet 81 of the hollow screw shaft 3 protruding out through a bearing 84 at the center of the orifice side plate and a sand outlet 82 Separates the mixture of liquid and sand that has entered the inlet 81 by centrifugal force and propulsion force of the outer cylinder 83 and screw device 6 which rotate at a high speed with slight rotation difference, So that the liquid component is discharged to the liquid discharge port 85 through the orifice and the sand component is discharged to the sand discharge port 82 so that the screw device 6 can be rotated (6), the screw decanter (8) with improved abrasion resistance, Can be implemented.

Also, the screw device (6) according to the present invention can be employed in the screw press (9). That is, a porous cylinder 93 having an inlet 91 on one side and a contaminant discharge port 92 on the opposite side and making a part of the space on the discharge side of the contaminant gradually smaller toward the discharge side, And a screw device 6 composed of a shaft 3 and a screw blade 2. The screw device 6 is rotated by a speed reduction motor 95 and a transmission device 94 so as to feed a screw, In the press 9, by constituting the screw device 6 with the screw device 6 according to the present invention, it is possible to realize the screw press 9 with enhanced wear resistance.

1: carbide (side) 2: screw blade 21: through hole
3: screw shaft 4: welding fuse 5: rivet member
51: (rivet) plate head 52: (rivet) tail 6: screw device
7: Screw conveyor 71: Inlet port 72: Outlet
73: cylinder 74: bearing 75: electric motor
8: Screw decanter 81: Inlet port 82: Sand outlet
83: outer cylinder 84: bearing 85: liquid outlet
9: screw press 91: inlet 92: contaminant outlet
93: Porous cylinder 94: Transmission device 95: Deceleration motor

Claims (6)

A method of manufacturing a screw device mounted in a cylinder having an inlet at one end thereof and an outlet at the other end thereof and mounted concentrically with the cylinder,
The screw shaft 3 is formed on an outer circumferential surface of the screw shaft 3 so that the object to be introduced from the inlet of the cylinder can be pushed and moved toward the outlet as the screw shaft 3 rotates And a plurality of pieces are continuously connected along outer arc glands of the front surface which is a surface pushing the object to be processed from both sides of the screw blade 2, A plurality of hardened pieces 1 made of a cemented carbide material having a higher hardness than the wings 2,
Each of the cemented carbide pieces (1) has a shape in which a small fan-shaped portion is removed from a central portion in a fan shape, and has an adhesive surface attached to the screw blade (2) and an outer surface opposite thereto, Wherein each of the taper holes has a tapered shape in which an area of a hole portion formed in the adhesive surface is smaller than an area of a hole portion formed in the outer surface of the tapered hole, Way,
Comprising a screw shaft (3) to which said screw vane (2) is coupled;
A horizontal preparation step of positioning the screw vane 2 so that the contact face of the screw vane to which one cemented carbide 1 is to be coupled is positioned horizontally while the screw vane 2 is positioned;
Wherein the outer surface of the screw blade (2) is positioned on the front surface of the screw blade (2) so that the outer surface of the one hard blade (1) (1) a positioning step of positioning the cemented carbide pieces in alignment;
A preheating step of heating a front surface of the screw blade (2), which is an inner bottom surface of a taper hole of one of the disposed hardened pieces (1), with a welder through the tapered hole space;
A welding step in which a filler is placed in the heated taper hole and then heated by a welding machine to weld the front surface of the screw blade 2 which is the bottom surface of the taper hole and to fill the taper hole with the weld bead 4 ;
The welding torch is cooled after the welding step so that the welding torso 4 is welded to the bottom surface of the taper hole and at the same time the taper hole is filled to harden the carbide piece 1 and the screw blade 2) is attached to the screw blade (2) without welding to the mutually contacting surface of the front surface of the screw blade (2); And
The horizontal preparing step, the hardening step (1), the pre-heating step, the welding step, and the cooling step are performed so that the cemented carbide pieces 1 can be continuously attached along the outside line of the front surface of the screw vane 2. [ And repeating the step of repeating the step of successively repeating the step of repeating the step of repeating the step. The method according to claim 1,
The one hard metal piece (1) is a first hard metal piece,
Wherein the repeating step comprises:
The screw shaft 3 to which the screw blade 2 is attached is rotated so that the first cemented carbide 1 is moved downward by a distance of three times the distance of the center arc of the first cemented carbide 1 from the horizontal position A rotating step of rotating the rotor;
The second, third and fourth cemented carbide pieces 1, which are the other cemented carbide pieces 1, are sequentially placed so as to be in contact with the side surfaces of the attached first cemented carbide pieces 1, ) To be horizontal;
The outer surface of each of the cemented carbide pieces 1 is placed on the outer surface of the screw blade 2 so that the outer surface of each of the cemented carbide pieces 1 is in contact with the front surface of the screw blade 2, (1) a positioning step of positioning the cemented carbide pieces in alignment;
The first, second and third hardened pieces 1 are bundled in a bundle, and the preheating, welding and cooling steps are sequentially performed so that the second, third and fourth hardened pieces 1 are temporarily Wherein said step of attaching comprises the step of attaching said screw device (6). delete A method of manufacturing a screw device mounted in a cylinder having an inlet at one end thereof and an outlet at the other end thereof and mounted concentrically with the cylinder,
The screw shaft 3 is formed on an outer circumferential surface of the screw shaft 3 so that the object to be introduced from the inlet of the cylinder can be pushed and moved toward the outlet as the screw shaft 3 rotates And a plurality of pieces are continuously connected along outer arc glands on the front surface which is a surface pushing the object to be processed from both sides of the screw blade 2, A plurality of hardened pieces 1 made of a cemented carbide material having a higher hardness than the wings 2,
Each of the cemented carbide pieces (1) has a shape in which a small fan-shaped portion is removed from a central portion in a fan shape, and has an adhesive surface attached to the screw blade (2) and an outer surface opposite thereto, Wherein each of the taper holes has a tapered shape in which an area of a hole portion formed in the adhesive surface is smaller than an area of a hole portion formed in the outer surface of the tapered hole, Way,
The screw blade (2) is prepared, and at the outer periphery of its front surface, at a position corresponding to the taper holes formed in the cemented carbide (1) to be joined to at least a part of the portion, Preparing a screw blade (2) having a through hole (21) of the same size as the diameter of the screw blade (2);
Coupling the screw blade (2) to the screw shaft (3);
Positioning a screw blade (2) for positioning the screw blade (2) with the front surface of the screw blade (2) to which the screw blade (2) is to be coupled, the screw blade
The tapered hole of the one hard metal piece 1 is made to communicate with the through hole 21 of the screw blade 2 in accordance with the outer line of the front surface of the screw blade 2, And a cylindrical portion 52 is inserted through the tapered hole so that the tail portion 52 is positioned in the through hole 21 and the rivet member 5 having the cylindrical portion 52 is inserted into the through- (1) a temporary fixing step of temporarily fixing the hardened piece (1) to the outside line of the front surface of the screw blade (2);
The tail portion 52 of the rivet member 5 is welded to the rear face of the rivet member 5 which is opposite to the front face of the screw vane 2 so that the head portion 51 The cemented carbide 1 is supported by the screw blades 2 without welding to the surfaces where the surfaces of the cemented carbide pieces 1 and the screw blades 2 are in contact with each other, A welding step of aligning the welding wire with the outer wire of the front surface of the welding wire; And
And repeatedly performing the step of arranging and fixing the hardened pieces (1) and the welding step so that the hardened pieces (1) can be continuously attached along the outer line of the front surface of the screw vane (2) Wherein the screw device is a screw device. 5. The method of claim 4,
The method of manufacturing a screw device (6) according to claim 1, wherein the step of fixing the hardened pieces (1) comprises arranging the at least two hardened pieces (1) so as to face each other. delete
KR1020170086613A 2017-07-07 2017-07-07 Manufacturing method of screw apparatus KR101857721B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020170086613A KR101857721B1 (en) 2017-07-07 2017-07-07 Manufacturing method of screw apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020170086613A KR101857721B1 (en) 2017-07-07 2017-07-07 Manufacturing method of screw apparatus

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR1020180020022A Division KR101983258B1 (en) 2018-02-20 2018-02-20 screw apparatus

Publications (1)

Publication Number Publication Date
KR101857721B1 true KR101857721B1 (en) 2018-06-19

Family

ID=62790410

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020170086613A KR101857721B1 (en) 2017-07-07 2017-07-07 Manufacturing method of screw apparatus

Country Status (1)

Country Link
KR (1) KR101857721B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102152769B1 (en) * 2020-01-28 2020-09-07 이종원 Method for removing harmful components of cashew nut extract and screw conveyor for size control and wear response for centrifugal separation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08132224A (en) * 1994-11-01 1996-05-28 Daiyonki Chishitsu Kenkyusho:Kk Production of tool with sintered hard alloy blade
KR100982545B1 (en) * 2010-05-27 2010-09-15 함동엽 Screw manufacture machine
KR20150000200A (en) * 2013-06-24 2015-01-02 강석윤 Manufacture apparatus for screw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08132224A (en) * 1994-11-01 1996-05-28 Daiyonki Chishitsu Kenkyusho:Kk Production of tool with sintered hard alloy blade
KR100982545B1 (en) * 2010-05-27 2010-09-15 함동엽 Screw manufacture machine
KR20150000200A (en) * 2013-06-24 2015-01-02 강석윤 Manufacture apparatus for screw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102152769B1 (en) * 2020-01-28 2020-09-07 이종원 Method for removing harmful components of cashew nut extract and screw conveyor for size control and wear response for centrifugal separation

Similar Documents

Publication Publication Date Title
JP6350334B2 (en) Joining method and composite rolled material manufacturing method
CN100344404C (en) Friction stir welding for material incapable of functional welding using a superabrasive tool
RU2284251C2 (en) Welding method
CN107717189B (en) Three-wire welding gun and multi-wire submerged arc welding method
CN107520550A (en) For the geometry in more step electrode welding faces that aluminium is welded to steel
CN102528243A (en) Arc welding-brazing method for titanium-aluminum dissimilar alloy TIG (tungsten inert gas) arc preheating
CN105397296B (en) Laser deposition-melt injection synchronous compound connecting method
CN110576263B (en) Dissimilar metal laser cladding welding method for copper pipe and steel pipe
KR101857721B1 (en) Manufacturing method of screw apparatus
CN108436234B (en) Double-heat-source cooperative welding method and device for high-thermal-conductivity mismatched metal material
CN106181017A (en) A kind of friction stir welding method of corronil
CN109079322A (en) The engine jet pipe preparation method of space launch vehicle
CN105414761A (en) Laser powder-filling welding method for particle reinforced metal matrix composites
US20140301798A1 (en) Cutting tool and method of manufacturing the same
JP2014534079A (en) Method of joining or repairing superalloy structures using resistance brazing of convex parts and corresponding superalloy components
CN106514149A (en) Processing method of integral guide apparatus
KR101247315B1 (en) Method of manufacturing rotation part of rotary machine
US10252365B2 (en) Deposition of braze preform
KR20160071483A (en) Method For Welding iron and steel By Hybrid Friction Stir Welding
CZ20022259A3 (en) Method for fixing a hard metal tooth to a saw blade
KR101983258B1 (en) screw apparatus
CN101386102A (en) Use of an activating flux for TIG welding of metal parts
CN113878197B (en) Swirler vacuum brazing clamp and swirler vacuum brazing method
JPH11245055A (en) Aluminum radiator and its manufacture
JP6895263B2 (en) Manufacturing Methods for Cylindrical Sputtering Targets, Backing Tubes, and Cylindrical Sputtering Targets

Legal Events

Date Code Title Description
GRNT Written decision to grant