CN106346035A - Low roughness processing method of filmatic bearing bushing - Google Patents

Abstract

The invention relates to the field of machining, in particular to a low roughness processing method of a filmatic bearing bushing. The method comprises the following steps that preparation before bushing processing is conducted, wherein before bushing processing, the machine tool should be started firstly to operate 30 min, so that it is guaranteed that the machine tool bed and the inside of a hydraulic support device is fully lubricative and rotate stably, according to the size of an excircle of the bushing drawing, the distances of each jackscrew of the busing base and the main shaft are measured, the distances are enabled to be equal and it is guaranteed the distances of each jackscrew and the bushing excircle are 2-5mm after the bushing is put in; workpieces are hoisted, the workpieces are flatly put before being hoisted, the inner hole center line of the bushing is enabled to be parallel to the ground, a nylon string is threaded through the inner hole of the bushing, one end of the bushing flange faces the machine tool bed firstly before the bushing is put in the bushing base; workpieces is installed, when the workpieces is installed, no wrench is used during process of adjusting nuts on both sides. The low roughness processing method of the filmatic bearing bushing is simple to operate, can guarantee processing quality of the workpieces, and improves production efficiency and reduces cost of production.

Description

Filmatic bearing bushing low roughness processing method

Technical field

The present invention relates to field of machining is and in particular to filmatic bearing bushing low roughness processing method.

Background technology

Filmatic bearing is the major part of milling train.Also known as fluid friction bearing, it is to be existed using hydrodynamic lubrication to filmatic bearing Form one layer of fine and close pressure film between tapered sleeve and bushing, separate two working surfaces, and direct metal contact does not occur, Reach state of liquid friction, between 0.005-0.0005, friction in bearing and heat producing losses are very for friction of fluid lubrication coefficient Little.Design and use according to milling train filmatic bearing require, and the safety coefficient of bearing must be over 1.5-2 could normal work Make, and affect to have in the oil film critical thickness of safety coefficient one be exactly bearing friction face surface roughness.And filmatic bearing Bushing is the important component part of filmatic bearing.The part being processed as be most difficult in bushing whole process of bushing endoporus.Plus The problems such as often wall unevenness in bushing after work, ripple in alloy surface.

Content of the invention

In order to solve the above problems, the present invention provides one kind simple to operate, ensure that workpiece processing quality, and improves life Produce efficiency, reduce the filmatic bearing bushing low roughness processing method of production cost.

Filmatic bearing bushing low roughness processing method of the present invention, comprises the following steps:

The first step, prepares before bushing processing, first should start lathe before processing bushing, makes lathe run 30 rain it is ensured that machine tool Steadily, according to bushing drawing excircle dimension, the measurement each jackscrew of liner clamp arrives for body and the internal sufficient lubrication of hydraulic support device, rotation The distance of main shaft, is allowed to equal and ensures that bushing puts each jackscrew garden 2-5mm outside bushing after people；

Second step, handling workpiece, before allocation and transportation workpiece, workpiece keeps flat, and makes bushing inner hole centreline parallel to the ground, is worn with nylon rope Cross bushing endoporus, bushing put in liner clamp front first bushing flange one end towards lathe-head；

3rd step, card engaging workpiece, do not use spanner during adjusting both sides nut when being installed, locked using handss, locking force Moderate, nut check excessively easily makes bushing deform, and is installed and determines the centre position in liner clamp for the bushing with Steel Ruler first, when When determining that bushing is within deviation lmm of liner clamp center, with dial gauge to bushing endoporus centering, when bushing two ends, endoporus is looked for After just, when deviation is within 0.1mm, carry out to excircle of bushing centering, when after the cylindrical centering in both sides, deviation is all within 0.02mm, To bushing flange end endoporus light processing one knife, see that the bright width that gets final product is about 20 mm, with micrometer to bushing wall-thickness measurement；

4th step, heavy boring, after being installed, heavy boring processing is carried out to bushing endoporus work surface it is desirable to tool orthogonal rake: 25-30 degree, after Angle: 15-18 degree, material selection 3yg8 hard cobalt series hard alloy, lathe spindle rotating speed turns for n=190/rain, bite t=0.1- 0.2mm, feed s=0.1mm/ turn, and will check continually on bush metal face whether defective, if defective during heavy boring Should be further continued for after processing in time processing, heavy boring back bush diameter of bore stays 0.1-0.12mm allowance；

5th step, standby knife right boring, the relief angle cutting light sword is 0 degree, width turn for n=190 for 0.01-0.02mm machine spindle speed/ Min, bite t=0.5-0.6, feed turn for s=0.1mm/；

6th step, unloads workpiece, with nylon rope allocation and transportation, prevents from scratching bush metal surface, when putting bushing bushing flange Side, towards thinking that top placement is that bushing inner hole centreline is perpendicular to the ground, prevents thin-wall bush from deforming.

The present invention is simple to operate, ensure that workpiece processing quality, and improve production efficiency, reduces production cost.

Specific embodiment

Filmatic bearing bushing low roughness processing method of the present invention, comprises the following steps:

The first step, prepares before bushing processing, first should start lathe before processing bushing, makes lathe run 30 rain it is ensured that machine tool Steadily, according to bushing drawing excircle dimension, the measurement each jackscrew of liner clamp arrives for body and the internal sufficient lubrication of hydraulic support device, rotation The distance of main shaft, is allowed to equal and ensures that bushing puts each jackscrew garden 2-5mm outside bushing after people；

Second step, handling workpiece, before allocation and transportation workpiece, workpiece keeps flat, and makes bushing inner hole centreline parallel to the ground, is worn with nylon rope Cross bushing endoporus, bushing put in liner clamp front first bushing flange one end towards lathe-head；

3rd step, card engaging workpiece, do not use spanner during adjusting both sides nut when being installed, locked using handss, locking force Moderate, nut check excessively easily makes bushing deform, and is installed and determines the centre position in liner clamp for the bushing with Steel Ruler first, when When determining that bushing is within deviation lmm of liner clamp center, with dial gauge to bushing endoporus centering, when bushing two ends, endoporus is looked for After just, when deviation is within 0.1mm, carry out to excircle of bushing centering, when after the cylindrical centering in both sides, deviation is all within 0.02mm, To bushing flange end endoporus light processing one knife, see that the bright width that gets final product is about 20 mm, with micrometer to bushing wall-thickness measurement；

4th step, heavy boring, after being installed, heavy boring processing is carried out to bushing endoporus work surface it is desirable to tool orthogonal rake: 25-30 degree, after Angle: 15-18 degree, material selection 3yg8 hard cobalt series hard alloy, lathe spindle rotating speed turns for n=190/rain, bite t=0.1- 0.2mm, feed s=0.1mm/ turn, and will check continually on bush metal face whether defective, if defective during heavy boring Should be further continued for after processing in time processing, heavy boring back bush diameter of bore stays 0.1-0.12mm allowance；

5th step, standby knife right boring, the relief angle cutting light sword is 0 degree, width turn for n=190 for 0.01-0.02mm machine spindle speed/ Min, bite t=0.5-0.6, feed turn for s=0.1mm/；

6th step, unloads workpiece, with nylon rope allocation and transportation, prevents from scratching bush metal surface, when putting bushing bushing flange Side, towards thinking that top placement is that bushing inner hole centreline is perpendicular to the ground, prevents thin-wall bush from deforming.

The present invention is simple to operate, ensure that workpiece processing quality, and improve production efficiency, reduces production cost.

Claims (1)

1. a kind of filmatic bearing bushing low roughness processing method is it is characterised in that comprise the following steps:

The first step, prepares before bushing processing, first should start lathe before processing bushing, makes lathe run 30 rain it is ensured that machine tool Steadily, according to bushing drawing excircle dimension, the measurement each jackscrew of liner clamp arrives for body and the internal sufficient lubrication of hydraulic support device, rotation The distance of main shaft, is allowed to equal and ensures that bushing puts each jackscrew garden 2-5mm outside bushing after people；

Second step, handling workpiece, before allocation and transportation workpiece, workpiece keeps flat, and makes bushing inner hole centreline parallel to the ground, is worn with nylon rope Cross bushing endoporus, bushing put in liner clamp front first bushing flange one end towards lathe-head；

3rd step, card engaging workpiece, do not use spanner during adjusting both sides nut when being installed, locked using handss, locking force Moderate, nut check excessively easily makes bushing deform, and is installed and determines the centre position in liner clamp for the bushing with Steel Ruler first, when When determining that bushing is within deviation lmm of liner clamp center, with dial gauge to bushing endoporus centering, when bushing two ends, endoporus is looked for After just, when deviation is within 0.1mm, carry out to excircle of bushing centering, when after the cylindrical centering in both sides, deviation is all within 0.02mm, To bushing flange end endoporus light processing one knife, see that the bright width that gets final product is about 20 mm, with micrometer to bushing wall-thickness measurement；

4th step, heavy boring, after being installed, heavy boring processing is carried out to bushing endoporus work surface it is desirable to tool orthogonal rake: 25-30 degree, after Angle: 15-18 degree, material selection 3yg8 hard cobalt series hard alloy, lathe spindle rotating speed turns for n=190/rain, bite t=0.1- 0.2mm, feed s=0.1mm/ turn, and will check continually on bush metal face whether defective, if defective during heavy boring Should be further continued for after processing in time processing, heavy boring back bush diameter of bore stays 0.1-0.12mm allowance；

5th step, standby knife right boring, the relief angle cutting light sword is 0 degree, width turn for n=190 for 0.01-0.02mm machine spindle speed/ Min, bite t=0.5-0.6, feed turn for s=0.1mm/；

6th step, unloads workpiece, with nylon rope allocation and transportation, prevents from scratching bush metal surface, when putting bushing bushing flange Side, towards thinking that top placement is that bushing inner hole centreline is perpendicular to the ground, prevents thin-wall bush from deforming.