When stretching metal stamping parts, lubricating oil or grease can be used to reduce friction and wear, improve work efficiency and product quality. Common lubricating oils include mineral oil, synthetic oil, and vegetable oil, while lubricating grease is a semi-solid lubricant made by mixing lubricating oil and thickener.

The selection of suitable lubricating oil or grease should consider the following factors:

1. Temperature: Choose the viscosity of lubricating oil or grease according to the temperature of the working environment to ensure good lubrication performance even at high or low temperatures.

2. Load: Select the bearing capacity of lubricating oil or grease according to the size of the workload to ensure effective reduction of friction and wear even under high loads.

3. Material: Choose the chemical properties of lubricating oil or grease according to the material of the metal stamping parts to avoid incompatible reactions or corrosion with the material.

4. Environment: Select lubricating oil or grease with waterproof, anti-corrosion, or anti-oxidation properties according to the special requirements of the working environment.

When using lubricating oil or grease, the following points should be noted:

1. Moderate use: Too much lubricant will increase costs and pollute the environment, while too little will not achieve good lubrication effect, so it should be used in moderation according to actual needs.

2. Regular replacement: Lubricants will age and become contaminated over time, so they should be replaced regularly to maintain good lubrication performance.

3. Pay attention to safety: Lubricants may be volatile, flammable, or toxic, so safety measures should be taken when using them to avoid accidents.

In short, choosing the appropriate lubricant or grease is crucial for the stretching process of metal stamping parts, which can improve work efficiency, extend equipment life, and ensure product quality.