CN101363473A - One-time sintering bimetallic bearing manufacturing method - Google Patents

Abstract

The invention discloses a one-time sintered bimetallic bearing manufacturing method. The invention aims to provide a method for manufacturing a bimetallic bearing with primary sintering, which has simple process, low energy consumption, low manufacturing cost and short period. It includes the following steps in turn: evenly spread copper alloy powder on the surface of the steel plate and sinter → make a plate of copper-steel bimetallic bearing material → use the plate of copper-steel bimetallic bearing material as a blank according to the size of the bimetallic bearing → roll Make the blank into a roughly circular shaft sleeve → extrude the inner and outer surfaces of the shaft sleeve with a correction sleeve and mandrel, and correct the size of the inner hole and outer circle of the shaft sleeve → cut and process the shaft sleeve to meet the finished product requirements of bimetallic bearings → Inspection→Packing and storage. In this method, only one sintering is used in the plate manufacturing process of copper-steel bimetallic bearing material, compared with the original two sintering and two rolling, which saves one sintering and two rolling, so that the size control and extrusion , which is completed once in the subsequent correction process, which greatly simplifies the process.

Description

One-time sintering bimetallic bearing manufacturing method

technical field

The invention relates to a manufacturing method of a composite bearing, in particular to a manufacturing method of a once-sintered bimetallic bearing.

Background technique

Most of the traditional sliding bearings are made of copper alloy pouring and casting into shaft sleeves, and then processed by cutting. This kind of structure has high manufacturing cost, especially as the price of non-ferrous metals rises. This kind of integral copper alloy bearing is called Bimetallic bearings are replaced. The current manufacturing method of bimetallic bearings is based on the steel plate, and the copper alloy powder is uniformly spread on the surface of the steel plate to make it have a certain spreading thickness; ; Carry out another rolling to make the copper alloy layer compact; then carry out secondary sintering to make the copper alloy layer firmly bonded to the steel back; finally carry out secondary rolling to precisely control the bimetallic sheet Dimensions: finally produce copper-steel bimetallic bearing materials that meet the required size requirements, and the manufacturing process of phosphor bronze-steel bimetallic bearing materials with a phosphorus content greater than 0.1% in patent application No. 200510110718.7 is produced by such a process Copper-steel bimetallic bearing material. The manufacture of bimetallic bearings is generally: according to the size of the bimetallic bearing, use copper-steel bimetallic bearing material to lower the billet → roll the billet into a circle → correct with a correction sleeve and mandrel → cut the shaft sleeve to achieve the bimetallic bearing Finished product requirements → inspection → packaging and storage. In the production of copper-steel bimetallic bearing materials, two sintering and two rolling are required. The process is complicated, the energy consumption is large, the manufacturing cost is high, and the production cycle is long. Some copper alloys also contain harmful substances such as lead and phosphorus. During multiple sintering and heating, it will pollute the surrounding environment.

Contents of the invention

The purpose of the present invention is to provide a bimetallic bearing manufacturing method with simple process, low energy consumption, low manufacturing cost and short period of one-time sintering.

In order to achieve the above purpose, the manufacturing method of a sintered bimetallic bearing is: it includes the following steps in turn: spread copper alloy powder evenly on the surface of the steel plate and sinter → make a plate of copper-steel bimetallic bearing material → according to the bimetallic bearing Dimensions: use copper-steel bimetallic bearing material as the lower blank → roll the blank into a roughly circular bushing → extrude the inner and outer surfaces of the bushing with a correction sleeve and mandrel, and correct the size of the inner hole and outer circle of the bushing →Cutting and processing the shaft sleeve to meet the finished product requirements of bimetallic bearings →Inspection →Packing and warehousing.

According to the above-mentioned one-time sintering bimetallic bearing manufacturing method, in the plate manufacturing process of the copper-steel bimetallic bearing material, it only uses one sintering, which saves one sintering and two rolling compared with the original two sintering and two rolling. The second rolling is to control the size. When the inner and outer surfaces of the bushing are extruded with the correction sleeve and the mandrel at the end, the size of the inner hole and outer circle of the bushing and the extrusion of the copper alloy layer are corrected later. Completed in one go. The process is greatly simplified, the versatility of the equipment is good, the process inheritance is good, the energy, labor and manufacturing costs consumed by sintering and rolling are saved, the quality of the product is still guaranteed, and it is also conducive to environmental protection.

Detailed ways

The present invention will be further described below by way of examples.

Embodiment one:

The manufacturing method of a sintered bimetal bearing is: it includes the following steps in turn: evenly spread CuPb10Sn10 copper alloy powder on the surface of the ordinary carbon structural steel plate Q235A steel plate, and the thickness of the powder depends on the required finished bimetal bearing to copper The thickness of the alloy layer is put into the sintering furnace for sintering, the sintering temperature is 760-850°C; the sintering time is 24 minutes → the plate made of copper-steel bimetallic bearing material → the copper-steel bimetallic bearing material is used according to the size of the bimetallic bearing The lower blank of the sheet → roll the blank into a roughly circular shaft sleeve → extrude the inner and outer surfaces of the shaft sleeve with a correction sleeve and mandrel to correct the inner hole and outer circle of the shaft sleeve and reach the required size of the bimetallic bearing → Cutting the end face and chamfering of the bushing → Inspection → Packing and storage.

Embodiment two:

The manufacturing method of a sintered bimetal bearing is: it includes the following steps in turn: evenly spread CuSn6Zn6Pb3 copper alloy powder on the surface of the high-quality carbon structural steel plate 20 steel plate, and the thickness of the powder depends on the required finished bimetal bearing. The thickness of the alloy layer is put into a sintering furnace for sintering, the sintering temperature is 850-920°C; the sintering time is 16 minutes → a plate made of copper-steel bimetallic bearing material → leveled by a plate leveling machine → according to the size of the bimetallic bearing Use the copper-steel bimetallic bearing material to lower the blank → roll the blank into a roughly circular shaft sleeve → squeeze the inner and outer surfaces of the shaft sleeve with a correction sleeve and mandrel to correct the size of the inner hole and outer circle of the shaft sleeve, And reach the size required by the bimetallic bearing → Cut the end face and chamfer of the shaft sleeve → Coat the outer surface of the shaft sleeve with tin for anti-rust treatment → Inspection → Packing and storage.

Embodiment three:

Spread CuPb24Sn4 copper alloy powder evenly on the surface of the stainless steel 304 steel plate. The thickness of the powder depends on the required thickness of the finished bimetallic bearing to the copper alloy layer. Put it into a sintering furnace for sintering at a sintering temperature of 800-900°C; sintering The time is 20 minutes → the plate of copper-steel bimetallic bearing material is made → rolled by a rolling mill and leveled with a leveling machine, so that the plate of copper-steel bimetallic bearing material reaches the specified thickness and flatness → according to the bimetallic bearing material The size of the bearing is made of the copper-steel bimetallic bearing material plate lower blank→rolling the blank into a roughly circular bushing→extruding the inner and outer surfaces of the bushing with a correction sleeve and mandrel, and correcting the inner hole and outer circle of the bushing The size → cutting and processing of the shaft sleeve to meet the finished product requirements of the bimetallic bearing → inspection → packaging and storage.

Embodiment four:

The manufacturing method of a sintered bimetal bearing is: it includes the following steps in turn: evenly spread CuPb30 copper alloy powder on the surface of the high-quality carbon structural steel plate 08 steel plate, and the thickness of the powder depends on the required finished bimetal bearing. The thickness of the alloy layer is put into the sintering furnace for sintering, the sintering temperature is 820-880°C; the sintering time is 22 minutes → the plate made of copper-steel bimetallic bearing material → rolled by a rolling mill to make the copper-steel bimetallic bearing material The plate reaches the specified thickness→according to the size of the bimetallic bearing, use the copper-steel bimetallic bearing material as the lower blank→roll the blank into a roughly circular bushing→extrude the inner and outer surfaces of the bushing with a correction sleeve and mandrel , Calibrate the size of the inner hole and outer circle of the shaft sleeve → cut and process the shaft sleeve to meet the finished product requirements of bimetallic bearings → inspection → packaging and storage.

In addition to the several copper alloy powders used above, copper alloy powders such as CuSn6.5P0.1 can also be used. For bimetallic bearings that require high dimensional accuracy or thick wall thickness or low precision of the original steel plate before sintering, in order to ensure accuracy, the copper-steel bimetallic bearing material plate can be rolled and / Or leveling, as embodiment two to four, but even so, its technology is still greatly simplified than before.

The above-mentioned various processing equipment, processing parameters and methods are the same as the existing ones except those mentioned, and will not be described in detail here.

Claims (6)

1. once sintered bimetallic bearing manufacture method, it is characterized in that it includes the following step successively: surface of steel plate spread equably the sheet material of copper alloy powder sintering → make copper-steel bimetal bearing material → according to the size of bimetallic bearing with the sheet material of copper-steel bimetal bearing material under blank → roll blank become axle sleeve → usefulness of circular to proofread and correct the inner and outer surface that cover and plug push axle sleeve, proofread and correct the endoporus of axle sleeve and cylindrical size → to the axle sleeve cutting, the finished product that reaches bimetallic bearing requires → checks → packs, puts in storage.

2. once sintered bimetallic bearing manufacture method according to claim 1 is characterized in that described steel plate is meant carbon structural steel plate or quality carbon structural steel or corrosion resistant plate.

3. once sintered bimetallic bearing manufacture method according to claim 1 is characterized in that described copper alloy powder is meant the powder of CuPb10Sn10 or CuSn6Zn6Pb3 or CuPb24Sn4 or CuPb30 or CuSn6.5P0.1.

4. once sintered bimetallic bearing manufacture method according to claim 1 is characterized in that described sintering: 760-920 ℃ of sintering temperatures; Sintering time 15-25 minutes.

5. once sintered bimetallic bearing manufacture method according to claim 1, it is characterized in that also having the plate rolling of copper one steel bimetal bearing material and/or the operation of smoothing making between the sheet material of copper-steel bimetal bearing material → according to the size of bimetallic bearing two-step with blank under the sheet material of copper-steel bimetal bearing material.

6. once sintered bimetallic bearing manufacture method according to claim 1 is characterized in that between the two-step that the finished product that reaches bimetallic bearing requires → checks, also having the antirust treating process that is coated with tin at the outer surface of axle sleeve to the axle sleeve cutting.