The machining workshop shall be built with fire resistance rating, and no other simple buildings shall be built in the workshop. It is forbidden to use gasoline, alcohol and other scrubbing machines in the workshop. The residual oil after parts cleaning shall not be poured into the sewer or ditch at will, but shall be poured into the container at the designated address for treatment. In workshops, fires are often caused by careless use of stoves for heating, burning with waste cotton yarn, throwing cigarette butts and matchsticks. Therefore, smoking and stove heating should be strictly handled. Oilcloth, oil cotton yarn and oil sawdust used for machining in Suzhou. They should be collected in a covered metal cylinder (box) and processed every day.
Honing is a method of finishing holes with a honing head with a grinding bar (oilstone). When honing, the workpiece is fixed, and the honing head rotates and makes reciprocating linear motion driven by the spindle of the machine tool. In honing, the grinding strip acts on the surface of the workpiece with a certain pressure, cutting a very thin layer of material from the surface of the workpiece, and its cutting trajectory is cross chequer. In order to make the motion track of the abrasive grains of the sand bar not repeat, the revolutions per minute of the rotary motion of the honing head and the reciprocating strokes per minute of the honing head should be mutually prime.
To understand the hardness requirements, the higher the hardness requirements of the equipment used in some places, the better. However, this is generally only the hardness requirements when processing the workpiece. If it is processing materials, the hardness should not be too hard, otherwise the material may be too hard and affect the normal work of the parts. It depends on the specific function of the processed parts. If it is used in some high-temperature industries, the selected material must be high-temperature resistant material, and if it is used in some other industries, the appropriate material should be selected according to the requirements of the industry.
The main characteristics of flange connection in use are convenient disassembly, high strength and good sealing performance. During the installation of the flange, it is required that the two flanges should be kept parallel, and the sealing surface of the flange should not be damaged, and it should be cleaned. Flange gaskets shall be selected according to the design regulations. The center of pipe and flange shall be on the same horizontal line. The center of the pipe is 90 degrees vertical to the sealing surface of the flange. The position of flange bolts on the pipeline should be consistent.
The box structure is complex, and the accuracy requirements of the main surface are high. The cutting force, clamping force and cutting heat generated during rough machining have a great impact on the machining accuracy. If the rough machining is carried out immediately, the internal stress of workpiece deformation caused by various reasons after rough machining is not fully released, and it cannot be eliminated during finish machining, resulting in the deformation of the box after machining and unloading, which affects the final accuracy of the box, I think in the rough machining process, the fixture should be loosened for many times, so that the internal stress can be released as soon as possible, and the machining quality of the box body can be improved to a greater extent.
For the safety production requirements of mechanical processing equipment, the materials used by mechanical processing equipment must meet the safety and environmental protection requirements, and it is not allowed to use materials that are harmful to human body and have not been inspected and qualified by the safety department. The overall structure of the machining equipment must be flat and smooth without sharp edges and corners. Mechanical processing equipment that is easy to cause injury accidents must adopt fully fixed or semi fixed closed covers. Mechanical or electrical barriers, interlocks and two hand disengagement devices must be used for machining equipment. Automatic or semi-automatic loading and discharging device. Automatic or manual emergency stop devices shall be provided.