Guide to Purchasing Surface Grinders: A Comprehensive Analysis from Technical Parameters to Model Selection Skills

 

As a core device in the field of precision machining, surface grinders occupy an important position in industries such as mold manufacturing, hardware processing, and instrumentation, thanks to their high precision, high stability, and wide applicability. This article will provide systematic purchasing guidance from aspects such as technical parameters, model selection points, and structural characteristics to help users efficiently meet their production needs.

 

I. Analysis of Core Parameters of Surface Grinders

1. Matching of Machine Models and Sizes

   Common machine models include M300A, M260, etc. The corresponding worktable stroke (such as 680×335mm or smaller specifications) needs to be selected according to the size of the workpiece to be processed. The size of the worktable surface directly affects the placement range of the workpiece. For example, 630×300mm is suitable for medium - sized mold processing, while 500×250mm is suitable for precision small parts.

 

2. Configuration of the Grinding Wheel System

   - The rotation speed of the grinding wheel is 2800 revolutions per minute, which needs to match the hardness of the material. High - speed rotation is suitable for hard materials such as quenched steel, while low - speed rotation is applicable to brittle materials to prevent cracking.

   - The standard size of the grinding wheel is 250×25×75mm (outer diameter×width×inner diameter), and non - standard specifications can be customized for special workpieces.

 

3. Power and Precision Indicators

   - The total motor power is 3.16kW, among which the 1.5kW grinding wheel motor determines the grinding efficiency, and the 0.04kW cooling pump affects the surface quality of the processed workpiece.

   - The parallelism needs to reach 0.005/100mm. High - precision machine models can control the error within the micron level through hydrostatic guides and temperature - controlled spindles.

 

II. Five Key Elements for Model Selection Decision - Making

1. Classification of Processing Requirements

   - Plane processing: Horizontal - spindle rectangular - table machine models are preferred, which are suitable for box - type parts.

   - Ring/Thin - sheet workpieces: Horizontal - spindle circular - table or vertical - spindle circular - table machine models should be selected, which support inclination angle adjustment.

   - Mass production: Double - ended surface grinders can achieve an efficiency of dozens of pieces per minute and are suitable for standard parts such as bearing rings.

 

2. Priority Ranking of Technical Parameters

   - First, pay attention to the size and stroke of the worktable to ensure the clamping space for the workpiece.

   - Second, select the vertical feed amount of the grinding wheel (about 140mm/min) and the precision of the transverse handwheel (0.02mm/grid), which affect the surface roughness.

 

3. Selection of Automation Degree

   - Manual machine models are suitable for single - piece maintenance, with a cost of about 30,000 - 80,000 yuan.

   - Semi - automatic machine models are equipped with CNC positioning functions, and the precision is improved to ±0.002mm.

   - Fully automatic machine models are equipped with servo motors and intelligent dressing systems and are suitable for 24 - hour continuous production.

 

4. Quality Verification of Core Components

   - Check whether the spindle uses hydrostatic bearings, and the temperature rise needs to be controlled within 2℃.

   - The hydraulic system needs to have proportional valve control to ensure the smoothness of the feed.

 

5. Balance between Service and Cost

   - Priority should be given to suppliers that offer a three - year warranty for the spindle and free commissioning and training.

   - When the budget is limited, standard machine models can be selected, and modules such as automatic measurement can be gradually added later.

 

III. Expansion of Industry Applications

1. Optical Glass Processing

   High - precision machine models can achieve a surface roughness of Ra0.01μm through diamond grinding wheels, meeting the requirements of optical components in laser fusion devices.

 

2. Aerospace Field

   The processing of titanium alloy components requires an oil mist recovery system and constant - temperature coolant to prevent thermal deformation of the material.

 

3. Micro - part Processing

   Micro - grinding technology can process thin sheets with a thickness of 0.1mm, and the precision can reach ±1μm when combined with a CCD tool - setting system.

 

IV. Key Points for Acceptance and Maintenance

1. On - site Test Items

   - The noise during no - load operation should be ≤75dB.

   - The vibration value of the machine tool during full - load processing should be <2μm.

 

2. Daily Maintenance Specifications

   - Check the thickness of the guide rail lubricating film every week (it is recommended to be ≥0.03mm).

   - Replace the hydraulic oil filter element every quarter to prevent particulate matter from damaging the proportional valve.

 

Through systematic analysis of technical parameters, precise matching of processing scenarios, and strict control of equipment quality, enterprises can significantly improve the return on investment of surface grinders. It is recommended to conduct on - site inspections of the suppliers' production bases, focusing on the cleanliness of the assembly workshop and the standardization of the quality inspection process to ensure the long - term stable operation of the equipment.