JPH09316570A - End bearing for one-way clutch and other sliding part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end bearing for one-way clutch and other sliding parts, having wear resistance equal to that of sliding parts made of conventional wear resistant high strength brass of >30% beta phase content and being less expensive and having higher efficiency than heretofore because the cold plastic working method with superior productivity can be adopted at the time of manufacture. SOLUTION: The end bearing for one-way clutch and the other sliding parts are manufactured by subjecting a stock, such as plate, tube, and bar, of manganese silicide type high strength brass, in which the amount of beta phases in metallic structure is controlled to <=30% to provide cold plastic workability, to cold plastic working. At this time, this high strength brass has a chemical composition shown in following (1) and (2): (1) a chemical composition consisting of, by weight, 15-37% Zn, 0.3-5.0% Mn, 0.3-3.0% Si, and the balance Cu with inevitable impurities; (2) a chemical composition containing, besides the elements in the above (1), at least one or more elements selected from the group consisting of, by weight, 0.1-5% Al, 0.1-4% Ni, 0.1-4% Co, 0.1-4% Pb, 0.1-4% Bi, 0.1-3% Sn, 0.1-3% Fe, 0.05-2% Cr, 0.05-2% Ti, 0.05-2% V, 0.05-2% Zr, 0.05-2% Nb, and 0.05-2% Mo.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end bearing for a one-way clutch used in a torque transmission machine such as a ship, an automobile, an aircraft, and a mechanical device, and other sliding parts for use under severe sliding conditions.

[0002]

2. Description of the Related Art Up to now, a wear resistant high strength brass alloy having a metal structure in which the amount of β phase having a good wear resistance exceeds 30% has been used as a material for a sliding portion for use under severe sliding conditions. (For example, shown in Table 1 as a comparative example alloy ,,
Etc.), and sliding parts obtained by molding the cast material or hot forged material into a finished shape by cutting are used.

The following two types of end bearings for a one-way clutch, which is a kind of sliding parts, are used. A phosphor bronze plate or strip formed by cold pressing. A cast material of wear-resistant high-strength brass having a metallographic structure in which the amount of β phase exceeds 30%, and formed into a finished shape by cutting.

[0004]

The above-mentioned conventional sliding parts have good wear resistance, but the cold plastic workability of the material is poor. Therefore, a cutting method must be adopted for finish forming. There wasn't. For this reason, the material yield and productivity of mass-produced parts such as automobile parts are worse than those formed by cold pressing. Also, when machining sliding parts with complicated shapes, it is used for cutting. The mechanical equipment was also very expensive, and was more costly than the cold press molding.

Further, in the above-mentioned current end bearing, a phosphor bronze plate or strip formed by cold pressing does not include a cutting step, has good yield and productivity, and is suitable for mass production. However, the price of phosphor bronze plates and strips is high, but on the other hand, the wear resistance is inferior to that of high-strength brass materials with a metal structure having a β phase content of more than 30%. there were. Also, a wear-resistant high-strength brass cast material having a metal structure with a β-phase content of over 30% and formed into a finished shape by cutting has good wear resistance, but like end bearings. The thin-walled product has a disadvantage that the yield is poor, a dedicated processing device is required, and productivity cannot be improved, so that it is more costly than the product formed by the cold press.

The present invention has been made in view of the above-mentioned conventional circumstances.
Abrasion resistance in which the amount of β phase exceeds 30%, which has the same abrasion resistance as sliding parts made of high-strength brass, and the cold plasticity with which it has good productivity. Since the processing method can be adopted, it is an object of the present invention to provide an end bearing for a one-way clutch and other sliding parts which are more inexpensive and have higher performance than ever before.

[0007]

In order to achieve the above object, the sliding component of the present invention comprises:

It has the chemical composition shown in and of [0009], and the amount of β phase in the metal structure is 30
The gist is that the materials such as dialysis manganese-based high-strength brass plates, strips, pipes, and rods, which are controlled to be less than 0.1% and have cold plastic workability, are made by cold plastic work.

The end bearing for a one-way clutch of the present invention is as follows.

Plates, strips of dialysis manganese-based high-strength brass having the chemical components shown in and of [0009] and having the amount of β phase in the metal structure controlled to 30% or less and having cold plastic workability. The gist is that the material of the pipe is made by press working such as cold punching, bending, drawing and other cold plastic working.

In weight%, Cu = Bal. , Zn = 15
~ 37%, Mn = 0.3-5.0%, Si = 0.3 ~
3.0%, and unavoidable element weight%, + at least one element selected from the following group Al = 0.1 to 5%, Ni = 0.1 to 4%, Co = 0.
1 to 4%, Pb = 0.1 to 4%, Bi = 0.1 to 4%,
Sn = 0.1-3%, Fe = 0.1-3%, Cr = 0.
05-2%, Ti = 0.05-2%, V = 0.05-2
%, Zr = 0.05 to 2%, Nb = 0.05 to 2%, M
o = 0.05-2%

[0010]

[Operation] By using a wear resistant high-strength brass material having good cold plastic workability and β phase of 30% or less for sliding parts for severe sliding conditions, good productivity, cold punching , Cold forging, cold press forming such as cold bending, cold drawing,
It is possible to adopt cold wrought processing methods such as cold swaging, and sliding produced by machining wear-resistant high-strength brass casting materials and hot forging materials with the current β phase exceeding 30%. Even parts that are more complex than parts can be manufactured in large quantities and at low cost.

Wear resistance of β-phase is 30% or less Cold-stretching a high-strength brass material to increase wear resistance, and β-phase is 30% or less.
It is possible to add the same wear resistance as that of the current one, which is made of a material exceeding 100%.

By using a dialysis manganese-based high-strength brass plate or strip having a β phase of 30% or less as the material of the end bearing, the material cost is lower than that of phosphor bronze,
Moreover, because it has cold extensibility, it is possible to adopt cold press forming suitable for mass production, as well as end bearings made from phosphor bronze plates and strips, and wear resistant high strength brass casting. It can be formed at a lower cost than a machined material, so it is cheaper than either of the current two types of end bearings.

The dialysis manganese-based high-strength brass material having a β phase of 30% or less increases the wear resistance of the material by cold plastic working, and has better wear resistance than the current end bearing of phosphor bronze. Abrasion resistance in which the β phase exceeds 30% It is possible to add abrasion resistance equivalent to that made from high strength brass material.

Next, with regard to the constituent components of the dialysis manganese-based high-strength brass material according to the present invention, the action and the reason for limiting the range will be described.

(1) It is a basic element that forms a solid solution in the Zn matrix and increases the strength of the material and the amount of β phase. If it exceeds 37%, the amount of β phase exceeds 30%, and if it is less than 15%, the strength increases. Run short.

(2) Mn, Si Mn ₅ Si ₃ is an element that constitutes the intermetallic compound that affects the wear resistance of this alloy.
₅ Si ₃ Intermetallic compound is scarcely crystallized and wear resistance is insufficient. If the upper limit is exceeded, the amount of intermetallic compound crystallized is too large and the toughness of the material is lowered.

(3) Similar to Al Zn, it is an element that increases the strength of the material and the amount of β phase, but combines with Ti, Co, Si, Nb, Fe, V, and Zr to form a hard intermetallic compound, which is resistant to It contributes to the improvement of wear resistance. If it is less than 0.1%, the effect does not appear. If it exceeds 5%, the amount of β phase exceeds 30%, which impairs cold plastic workability.
Crystallize a coarse intermetallic compound to make the material brittle.

(4) Sn Prevents dezincification corrosion of brass and contributes to the improvement of strength by increasing the amount of β phase. If it is less than 0.1%, the effect will not appear,
If it exceeds 3%, the amount of β phase exceeds 30% or the ductility of the material is impaired.

(5) Both Pb and Bi improve the seizure resistance and machinability of the material. 0.
If it is less than 1%, the effect is not exhibited, and if it exceeds 4%, the ductility of the material is impaired.

(6) Ni Addition of Ni reduces the amount of β phase, improves the toughness of the material, and combines with Ti, Co, Si, Nb, Fe, V and Zr to form a hard intermetallic compound, It contributes to the improvement of wear resistance. If it is less than 0.1%, the effect does not appear, and if it exceeds 4%, the effect is saturated.

(7) Mo, Fe, V, Zr, Nb, C
All of r, Ti, and Co combine with other additive elements, or individually form a hard crystallized substance, contribute to wear resistance, and refine the crystal. If it is less than the set lower limit value, no effect appears, and if it exceeds the upper limit value, large hard crystallized substances are generated, which makes the material brittle and damages machinability.

[0022]

【Example】

(1) Manufacture of test material Test material by the example alloy according to the present invention The example alloy according to the present invention shown in Table 1 was melted in a high frequency induction furnace, and was die-cast into a cylindrical shape of φ120 × 120 mm. Then, it was roughly machined into a size of φ100 × 100 mm. Then, at a temperature of 700 ° C., 15 × 100 × 520
Hot forged to a size of mm. This is 10 × by machining
It was made into a material for rolling with a size of 100 × 120 mm. Rolling material is 2 × 100 × 6 at 700-750 ℃
Hot rolled to a size of 00 mm. The hot rolled one is
After cutting the length to a size of 2 × 100 × 160 mm, one intermediate annealing is performed at 650 ° C. on the way to obtain 0.9 × 1.
Cold rolled to a size of 00 × 355 mm and further 650
After annealing at ℃ and pickling, 0.8 × 100 × 400mm
The sample was cold-rolled to have the dimensions of.

[Table 1]

Specimens of Comparative Example Alloys Chemical compositions of the comparative alloys are also shown in Table 1. Among the comparative alloys, those of phosphor bronze are commercially available 0.8 × 100.
A plate having a size of 1000 mm was purchased and used as a sample.
As for the wear-resistant high-strength brass material, a continuous cast material having the chemical composition shown in Table 1 and a dimension of φ80 × 120 mm, and a material obtained by further hot forging the dimension of φ55 × 250 mm at 780 ° C. were used as test materials. And

(2) Abrasion test Regarding the example alloys according to the present invention and the phosphor bronze of the comparative example alloys, the respective test materials were processed into the shape of the test piece shown in FIGS. 1 and 2. Comparative alloys other than phosphor bronze were processed into the shapes of the test pieces shown in FIGS. A test piece having a shape shown in FIGS. 5 and 6 was used as a counterpart material for the wear test. The abrasion test was based on the thrust abrasion test. The test conditions are as shown below.

Thrust wear test conditions Rotational speed: 6,000 rpm Test load: 1,000 N Test time: 60 minutes Test frequency: n = 1 Test temperature: Room temperature Lubricating oil: ATF Counterpart material: SCM 415 (HCQT) (HRC = 6
0) Surface roughness: Test material: 0.3S, Counterpart material: 1.3S

Evaluation Method of Thrust Abrasion Test The depths of sliding marks on the test material after the test are measured with a surface roughness meter at two locations at 180 ° intervals, and the average value is used for the evaluation of abrasion resistance. I was there. The smaller the value, the better the abrasion resistance.

Results of Thrust Abrasion Test Table 1 shows the measured depth of each sliding mark after the test of each test material of the example alloy and the comparative example alloy according to the present invention.

(3) Forming test The alloys of the examples according to the present invention were subjected to a wear test to confirm their cold plastic workability.
A forming test was conducted on a 00 mm rolled plate in the shape of the end bearing shown in FIGS. 7 and 8 using a 30 ton crank press. It was confirmed that all the test materials were completely molded as shown in the drawing, had no cracks or scratches, and had sufficient cold plastic workability.

(4) Cost Comparison of End Bearings As a first embodiment of the present invention, a price ratio with a prior art product is shown in Table 2.
It was shown to.

[Table 2]

[0030]

From the above results, the sliding component of the present invention is
The conventional β phase used for applications with severe sliding conditions has 3
Wear resistance exceeding 0% It has the same wear resistance as sliding parts made of high-strength brass, and because it can be manufactured by cold plastic working method with good productivity, Cheap,
It is possible to provide high-performance sliding parts.

The wear resistance of the end bearing of the present invention is
It is better than that of conventional phosphor bronze, and is equivalent to that made by machining a casting material of wear-resistant high-strength brass whose β phase exceeds 30%.

Since the end bearing of the present invention can be formed into a product shape by cold pressing, the cost for forming it into a product shape is the same as that of the conventional phosphor bronze, but the material cost is low and the total cost is low. . Compared to the one made by machining a wear-resistant high-strength brass casting material with a β phase exceeding 30%, the material unit price is the same, but the cutting cost is not included and the product shape can be made thin, so the material cost is low. Cheaper and moreover
Since the cost of molding into a product shape is also low, the product of the present invention has the advantage that the total price is naturally lower.

[Brief description of drawings]

FIG. 1 is a front view illustrating an example alloy according to the present invention and a wear test piece formed of phosphor bronze.

FIG. 2 is a side view illustrating an example alloy according to the present invention and a wear test piece formed of phosphor bronze.

FIG. 3 is a front view illustrating a wear test piece formed of a comparative alloy other than phosphor bronze.

FIG. 4 is a side view illustrating a wear test piece formed of a comparative alloy other than phosphor bronze.

FIG. 5 is a front view of a mating member used in a wear test.

FIG. 6 is a side view of a mating member used in a wear test.

FIG. 7 is a front view illustrating an end bearing formed of the example alloy according to the present invention.

FIG. 8 is a side sectional view illustrating an end bearing formed of the example alloy according to the present invention.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyuki Inagaki 1 of Nishi-Ashihara New Tateyama Town, Nakashinkawa-gun, Toyama Prefecture Chuetsu Alloy Casting Co., Ltd. (72) Inventor Shigeyuki Aburaya, Tateyama Nakashinkawa-gun, Toyama Prefecture 1 in Shin-Ashihara New Town 1 Chuetsu Alloy Casting Co., Ltd.

Claims (4)

[Claims] 1. By weight%, Zn: 15 to 37%, Mn:
0.3-5.0%, Si: 0.3-3.0%, balance Cu
And dialysis manganese-based high-strength brass alloy plates, strips, which have an alloy component consisting of unavoidable impurities, control the amount of β phase in the metal structure to 30% or less, and have cold plastic workability,
Sliding parts manufactured by cold plastic working materials such as pipes and rods. 2. Zn: 15-37% and Mn:% by weight.
0.3-5.0%, Si: 0.3-3.0%,
Al: 0.1 to 5%, Ni: 0.1 to 4%, Co: 0.
1 to 4%, Pb: 0.1 to 4%, Bi: 0.1 to 4%,
Sn: 0.1 to 3%, Fe: 0.1 to 3%, Cr: 0.
05-2%, Ti: 0.05-2%, V: 0.05-2
%, Zr: 0.05 to 2%, Nb: 0.05 to 2%, M
o: One or more selected from 0.05 to 2%, an alloy component consisting of the balance Cu and inevitable impurities, and controlling the amount of β phase in the metal structure to 30% or less. ,
A sliding part characterized by being manufactured by cold plastic working materials such as plates, strips, tubes, and rods of diatomized manganese-based high-strength brass alloy with cold plastic workability. 3. Zn: 15-37% and Mn:% by weight.
0.3-5.0%, Si: 0.3-3.0%, balance Cu
And dialysis manganese-based high-strength brass alloy plates, strips, which have an alloy component consisting of unavoidable impurities, control the amount of β phase in the metal structure to 30% or less, and have cold plastic workability,
An end bearing for a one-way clutch, which is manufactured by cold punching, bending, drawing, or other press working of materials such as pipes, or other cold plastic working. 4. Zn: 15-37% and Mn:% by weight.
0.3-5.0%, Si: 0.3-3.0%,
Al: 0.1 to 5%, Ni: 0.1 to 4%, Co: 0.
1 to 4%, Pb: 0.1 to 4%, Bi: 0.1 to 4%,
Sn: 0.1 to 3%, Fe: 0.1 to 3%, Cr: 0.
05-2%, Ti: 0.05-2%, V: 0.05-2
%, Zr: 0.05 to 2%, Nb: 0.05 to 2%, M
o: One or two or more selected from 0.05 to 2%, an alloy component consisting of the balance Cu and unavoidable impurities, and controlling the amount of β phase in the metal structure to 30% or less. ,
Manufactured by cold stamping, bending, drawing, or other press working of cold-pressed manganese-based high-strength brass alloy sheets, strips, pipes, or other materials that have cold plastic workability, or other cold plastic working End bearing for one-way clutch featuring.