Honing Machine

Overview

Grinding the surface of the workpiece with a honing head.

Mainly used in automotive, tractor, hydraulic parts, bearings, aviation and other manufacturing industries to honing the hole of the workpiece.

The honing machine is available in both vertical and horizontal type.

Different categories and characteristics

The vertical honing machine has a short spindle working stroke and is suitable for honing cylinders and tank holes.

The honing head with the oil stone is rotated by the vertically disposed main shaft, and the vertical reciprocating feed motion is driven by the hydraulic device.

The horizontal honing machine has a long working stroke and is suitable for honing deep holes up to 3000 mm.

The horizontally placed honing head does not rotate and only makes axial reciprocating motion.

The workpiece is rotated by the main shaft, and a central frame supporting the workpiece and a guide frame supporting the honing rod are arranged in the middle of the bed.

During the processing, the whetstone of the honing head is fed radially under the action of the expansion and contraction mechanism, and the workpiece is gradually processed to the required size.

The new type of honing machine uses a hydraulic expansion and contraction honing head.

Most of the honing machines are semi-automatic, often with automatic measuring devices, and can also be included in the automatic production line.

In addition to the honing machine for machining holes, there are external honing machines, bearing honing machines, flat honing machines and curved honing machines for machining surfaces.

Hydraulic honing machine working principle

There are two general ways to increase and decrease the honing head:

  1. Constant pressure feed
  2. Quantitative feed

Constant pressure feed generally achieved by hydraulic and spring.

Quantitative feed is usually achieved by servo motors, stepper motors or some other intermittent mechanism.

The manual feed mode can also be counted as a quantitative feed.

Operational requirements

The operation of the honing machine is technically demanding and requires a person with a subtle skill to operate.

This person should be trained in the safe operation of grinding and make the necessary preparations before proceeding.

Check the lubrication of the honing machine, especially the gearbox, to check if there is lubrication oil.

If there is no oil, you must fill oil into all the oil holes.

Check if the coolant is clean. If the coolant is insufficient, the coolant should be filled.

The coolant should be cleaned regularly and no dirty coolant is allowed.

After two months of continuous work, oil changes are required.

Under normal circumstances, the oil should be changed once in the first quarter.

Hydraulic oil should generally use #20 engine oil.

When changing oil, use kerosene to clean the oil filter and fuel tank.

After starting the machine, idle for a period of time to drain the air from the hydraulic lines and check that the various parts are working properly.

The temperature of the hydraulic oil used in machine tools is generally not allowed to exceed 60 ° C, and the maximum temperature should not exceed 65 ° C. Otherwise, cooling measures should be taken or stop the machine.

Check if the oversize of the oil stone is correct, whether the expansion and contraction of the honing head is flexible, and whether the spring that fastens the oil stone seat is firm.

Adjust the rotary motion and reciprocating motion of the machine tool spindle so that it meets the requirements specified in the process specification.

Prepare the tools for measurement and check that the work of the door is normal and the accuracy of the gage is up to standard.

Need to check as required to ensure personal safety and honing machine work properly.