JPS5947080A - Cold finished stainless steel clad bar and its production - Google Patents

Abstract

PURPOSE:To press-stick a pipe to a round bar by compressive force and to obtain a stainless steel clad round bar, by inserting the metallic round bar in the stainless steel pipe and drawing the pipe together with the round bar by means of a die. CONSTITUTION:One end 3a of an Ni stainless steel pipe material 3 is pointed with a roll pointing machine to draw the one end 3a. On the other hand, one end 4a of a metallic round bar 4 is similarly pointed to draw the outside diameter of the end 4a smaller than the bore of the pipe material 3. The drawn end 4a of the bar 4 is inserted into the material 3 from the non drawn side port 3b, and the ends 3a, 4a are fitted to each other and are inserted into the through-hole 5a of a die 5. The penetrated ends 3a, 4a are drawn by a drawing bench while oil is fed to the material 3 and the bar 4 in an arrow X direction, then the material 3 is securely press-stuck to the bar 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a rod-shaped iron product with excellent corrosion resistance and a method for manufacturing the same.

Traditionally, rod-shaped υg with eating habits! 4! I','J
As a product, 101 hollow stainless steel and V rods are known, but such hollow stainless steel 1 nos. etc. 5
Bar-shaped steel ivy products that have been subjected to plating surface treatment are known, but such plated iron products have the disadvantage that they are easily damaged by blank stainless steel rods.

The present invention solves the drawbacks of the above-mentioned conventional iron nails/jets. Not only does it have excellent corrosion resistance, but it also has the strength of a special agent and has the strength of a stainless steel clad polishing round bar.
The purpose is to hold +1B,i.

In the following, the present invention will be explained based on the drawings showing examples of the invention. IJIJ.

The stainless steel clad polishing round bar agent according to the present invention (hereinafter referred to as the present invention round bar fg/i) is made of iron or metal (hereinafter referred to as r1 electric carbon) as shown in Fig. 1.
A stainless steel vibrator 2 is coated on top of the
It is something that has been mastered. The type of iron used as the TJ material for the core 1 may be of any type, such as carbon nails 1, high-tensile steel, 1"B man-cut, heat-resistant, or free-cutting. t) Although 1-stenite stainless steel is most suitable for tE, other ferritic stainless steel rods such as Fluten 1, fl, and stainless steel can also be used together with the necessary calyxes P and L.The present invention The N method for storing a round bar is designed according to its I'+f F', but - Example is shown. J ], IL1 clause is 2
8rtrrn, and stainless steel g"L pa/f bub 2 with meat J' and I open to 1 is covered and crimped onto the groove.

The drawings below are for ease of viewing.
The dimensions are not as per the actual product. In this way, the wall thickness of the stainless steel vibrator 2 can be made much thicker than the thickness of the plating layer in the plating surface treatment 1).
The round bar of the present invention has extremely poor durability.

(D- means that nine Azusa copper of the present invention is used in (jL) in nσ, 11 motor shafts each (! 4 blades for stirring the chemical solution such as acid)
)QIshi1 It has high utility value in fields where rust resistance is required, such as 1-12 feet, conveyor rolls, or home kitchen utensils. In this case, it is of course possible to select the most suitable type 11 stainless steel wire depending on the ULF neck of the chemical solution or the salt concentration of the water to be mixed. Furthermore, the iron round bar 1M used for the core material 1 is carbon f'' as described above, regardless of the type of stainless steel vibrator 2 to be coated and crimped.
・Since 4 or special steel can be selected as desired, stainless steel clad Azusa with excellent tensile strength, good bending strength, and free machinability are available. Mountain setting a1 is possible. Therefore, it can fully meet the demands of various industries in the millet production industry.

Next, a method for manufacturing the round steel bar of the present invention will be explained.

First, as shown in Figure 2, Nl-based stainless steel (JIS
Consists of a ladle of SLIS804), outer diameter 27.2m$
, one #1i58 of stainless steel vibe material 8 with a thickness of 2 mm
As shown in FIG. 8, one end 8a of the C groove is tightened using a roll tII (J-cutting machine (not shown)) and made thin enough to be easily inserted into the through-hole of a die, which will be described later. On the other hand, as shown in Fig. 14, one end 4a of a round iron bar (billet) 4 with a diameter of 22.2 is inserted into a roll opening (=I-making machine (not shown)) as shown in Fig. 6. The poppy is shaped so that the outer diameter of its one end 4a is slightly smaller than the inner diameter of the narrow end 8a of the pipe material 8.

Next, as shown in FIG.
a, and as shown in FIG. 7, fit the drawn end 4a of the round bar 4 into the drawn end Ba of the pipe material 8, but do not fit together. Next, as shown in FIG. Pull it out.

The size of the through hole 6a of the die 50 is made small enough to compress the round bar 4 and reduce its area when it is pulled out. For example, it is desirable that the following conditions hold true for the shift in focus on the If/i area. That is, 10 [area S] of the through hole 5a. is made smaller than the sum of the cross-sectional area S1 of the round bar 4 and the area S2 of the thick wall portion of the pipe 8. Alternatively, if we focus on the inner diameter of the through hole 6a, the inner diameter is smaller than the outer diameter of the round bar 4 plus twice the thickness of the thick part of the vibrator 4/j8. It is desirable that In this way, the pipe material 8 is inserted into the through hole 5 of the die 6.
When a is pulled out, it is compressed by the inward direction of the through hole 6a,
The round bar 4 is also pressed by the pipe material 8 and its area is reduced. Note that if the gap between the pipe material 8 and the round bar 4 is too large, wrinkles will occur on the inner surface of the pipe material 8 when the P/R bar material 8 is compressed by the die 5, and the pipe material 8 will become wrinkled. The deformation of the internal structure of the golden bird becomes excessively large and irregular, resulting in brittleness. On the other hand, if the gap between the pipe material 8 and the PP 4 is too small, misalignment will occur, which will make it difficult to insert the round bar 4 into the pipe 8.

It has been found that a value of about 5% to 796% of the inner diameter is desirable. Next, the area reduction rate (here, area reduction rate refers to the cross-sectional area S2 of the thick part of the curved pipe material 8 to be drawn and [I) of the round bar 4]
Sum S1□ of area S1, sum S1 (
The difference between (S2.-812') and the first page of oA before pulling out
The sum of 1 and 2) is 5 to 20.
% is desirable.

If the area reduction rate is about 5%, it is too small, so the rolling of the pipe material 8 onto the round bar 4 is weak, and if the area reduction rate exceeds 8 ()%, it will be forced to elongate, and the metal There is a risk that an inconvenience may occur that may make the organization vulnerable.

In addition, it is desirable to obtain the stainless steel clad polishing ear of the target outer diameter by one set of drawings performed with the die 5 and - times of drawing. This is because if you pull it out once, insert it again, and pull it out, the -th time you pull it out, the pipe material 8
1-Yuga 1 is damaged due to hardening of the can sand, so when it is pulled out again, the pie buoy 8 is broken, so it is necessary to pull it out again after annealing. However, due to the standardization, rust (black crust) formed in the gap between the pipe rod 4 and the pipe rod 4, and when it was pulled out again, due to the rust, the round rod 4 and the pipe rod 3 were removed. The adhesion of the vibrator deteriorates, causing accidents such as the vibrator breaking.

As mentioned above, when the pipe material 8 is pulled out together with the round bar 4 by the die 6 at a temperature of 100, the pipe material 8 is pressed against the round bar 4 so strongly that it compresses the round bar 4 itself. ”8
The elongation reaction in the axial direction is considerably larger than the degree of elongation of Circle II 4, and as a result, frictional heat of the fully bent tissue is generated within the pipe material 8.By the way, the pipe material 8
is made of stainless steel, so its coefficient of thermal expansion is soft f;・Δ
The coefficient of thermal expansion is larger than that of the round bar 4 made of, etc. For example, the coefficient of thermal expansion is 1.5 times greater than that of austenitic sudenite L/S1 and annealed copper J.

Is that why J-bi soldiers inside the organization? The diameter of the pipe material 8, which expanded greatly due to °C, decreases in diameter as it cools, but the diameter decreases to a greater degree than the degree of reduction in the diameter of the round bar 4. He firmly and firmly overwhelmed Kuazusa 4.

As is clear from the above description, the round bar of the present invention (1.
I uses an iron round bar as the core A and J, and by selecting a stainless steel vibrator on the core material according to its tightening force, a variety of stainless steel such as stainless steel clad round bars with tensile strength can be obtained. It is possible to provide clad round bars with Jin. In addition, since the method of the present invention uses dies, the dimensions of the finished stainless steel clad round bar can be determined with great precision.
I can do four things with things. In addition, when crimping a stainless steel 5'M pipe buoy to 9 (?7), the pressure is applied to the da f so that the area of the round seam is reduced, so the crimping property is It can be made into something.

[Brief explanation of the drawing]

All drawings are for explaining the round copper bar of the present invention and its manufacturing method, and 'r++ I II is wood'j
r: Perspective view of Akimaru Kamiyama, Figure 2 is a perspective view of the stainless steel vibrator, Figure 3 is the force of one end of the vibrator exposed to the rotor, Figure 1 is a perspective view, Figure 4 Figure 5 is a perspective view of one end of the round bar with a roll cut, and Figures 6 and 7 are perspective views of the round bar inserted into the material. Figure 8 is a front view showing a state Dm in which the pipe material is crimped at 11 °C while being drawn out with a die into a round bar. 1...August, 2...Stainless steel vibrator, 8-...
Stainless steel pa/f buoy/J, aa...stainless steel ■
Alpha month A of Baifu month, Bengizo Dongfeng Ryuji 2nd decoy 3rd figure n 4th oral procedure amendment book (l': 15i 1978)
August 29, 2016, Mr. Commissioner of the Japan Patent Office, 1, Indication of the Case, 1982 Special Application No. 1130282, 11
,Explanation Name Stainless Clad Miga:",41",l;i1A+,
(, (: , 7 fjllj structure] -1,)ζ3 Relationship with the person making the amendment M 1""81 Applicant 1 1 Meiyama 1 name city 1 9 IX person Akira 1 t!?
'il・beating 1°J\ Tsukasa:I:'4;l
:11.4-j Shea (To the above representative Representative 1114 j
ilt (View 11, 1γ Hitoshi Address T53
0 Shibata 1-0 Ichibanchi-1 Koei Building Explanation, Kita-ku, Kita-ku, Osaka City amend the “Claims” as shown in the attached sheet. (2) “Tetsu 6ki
'' should be corrected to ``metal.'' (3) In the same book, page 8, lines 7 and 20, "iron" is corrected to "metal." (4) In the same book, page 17, "iron or steel (hereinafter simply referred to as iron)" is changed to "iron or steel or metal such as aluminum (hereinafter simply referred to as metal)". (5) In the same book, page 4, line 1, "heat-resistant 41/11 or free-cutting grade 1" is corrected to "-heat-resistant steel, free-cutting steel, or aluminum, etc." (0) Same book, same page @ lines 16 to 17, "Round steel bars are used as motor shafts used under the sea, and various chemicals such as acids"
is corrected to "Round steel bars are treated with various chemical solutions." (7) Same book, same page, line 18, "conveyor roll, or" is corrected to [conveyor roll, also (civil engineering steps, handrails, or). (8) Same page, page 1, lines 20 to r in the first line of page 5?
fij "depending on the salinity of the water" to "?1:41.,!;
J: Correct to 'SJ' depending on the environment.' (9) Same t1i, page 5, line 8, replace “iron” with “metal ha” 8
” Correct. uq same t[? , same page E1) "Special valve l" in line 5 is corrected to "special steel or other metal R-1." (1 (Aluminum for the purpose of quantity)
An example of a manufacturing method,” RJ corrects. 01 same old, insert the following sentence after ``to make it thinner.'' in lines 18 to 19 of the same page. ``In general, if the diameter of the core material exceeds 80 mm, cutting 1
”1 injury is suitable. ”
Corrected to "Round bar 4". (15 Doshu, page 9, line 16, "iron" is corrected to "metal." oct, same book, same shell, line 19) - iron and steel" is changed to "book a;:・
i and other metals”. (Correct the "Roll 1" date in lines 14 and 15 of page 10 of the same book to 1 date respectively. Sl...
・Delete "cross-sectional area of round 4fP, S+...thick part μ) 1 area of stainless steel 7, +4 pipe". 7. Record the entire text of “↑, 1 Claim Pii” after the amendment to the list of attached documents,
t, j, 7 document (attached sheet) 1j10 The stainless steel pipe was pulled apart due to the tightening force caused by the drawing process.
Stainless clad polished steel bar with 81 pressure 5 blued finish. (2) At the same time as "one round bar with nine bars", cut one end of a stainless steel barb material with an inner diameter slightly larger than the outer diameter of the round bar with a weight of C. For stainless steel, insert the 1" end of the round rod into the end and insert the stainless steel vibrator into the end. , cross section N of round bar
'l;! The stainless steel bow 1 vibe 4; j
By holding and pulling the ILI (-J end and the date end of the round bar with an appropriate means such as a draw bench, pull out the double overlapped stainless steel vibrator and round bar from the die through hole, Stainless steel clad polishing rod 7, which is characterized by compressing the stainless steel vibrator and round bar, and crimping the stainless steel vibrator 4J to the round bar.
Production method. (3) iM N+3 through hole 11 and 1. ” (But, round bar cross section 'ill Sz and pipe meat J) (part cross section 4j'
q'4 is approximately 80 to 85% of the sum of i S+
The method for manufacturing a stainless clad polished steel bar according to claim 1 and claim 2, which has the following characteristics.

Claims (1)

[Claims] (1) Uku no U! ”!A stainless steel cladding is placed around the core 1-fl consisting of 9 stirrers to create a tightening force (ζ, ζ,
1. Stainless steel clad polishing with 4'% f. ('',)) of empty iron round bar -)': it is U-ru ``1
With the attachment slot, one end of the stainless steel pipe material with an inner diameter slightly larger than the 91-meter diameter is rolled into a roll-loy, and the stainless-steel pipe is rolled. From the ii side, add 1 piece to the roll of Mkimaru Azusa (+, '(, j to 4 inches, roll 1-1fJc month f;
・1ξ 1-ru III (Insert the J end at t1″5 (?
, = state round sea lion and stainless steel l/sl, v vibe material 11
゛Mata-U, the fitted round rod and stainless steel vibrator (J-rulo 1 + i, i, circle (ImiO) 1 side book 78. and Sufu Nresu Hayabusa Sobaib Moon Meat]
Insert into the through hole of tights having a large through-section fI7, which is smaller than the sum of
The end of the roll is the roll of the round bar.
Using a suitable means such as a draw bench, hold the screw for 43 seconds and pull it out with the same force as the draw bench. , Stainless steel I11 pipe t'' cuffed round rod compressed], round rod (ζ Sten L / spj, 'l zf Eve 4ij wo LI-H-1 lekotre 'I:J?::Q Sten [/Scrad polishing companion M 'J'l 'd'i j
j r, J,:. (3) nu writing hole IA'Jr area is round bar 11 no 1
surface-section S, and vibe 4'')f, partial cross-section (i'j
Approximately 80-85% of the sum with S□