Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t
1. Blue-collar layer: That is, CNC machining operation technicians, proficient in machining and CNC machining process knowledge, proficient in the operation and manual programming of CNC machine tools (attributes: automated machine tools), understand automatic programming and simple maintenance of CNC machine tools (attributes: automated machine tools), such There is a large market demand for personnel, and they are suitable for operating workers of CNC machine tools (attributes: automated machine tools) in the workshop, but due to their single knowledge, their wages will not be much higher. 2. Gray collar layer: One, CNC machining programmer: Master the knowledge of 5 Axis CNC machining Aluminum technology and the operation of CNC machine tools (attributes: automated machine tools), be familiar with the design and manufacturing expertise of complex molds (title: mother of industry), and be proficient in 3D CAD/CAM software, such as UG, GOOGLE PRO/E, etc. ; Familiar with CNC
The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state. CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200 beryllium copper and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette
A type of fastener consisting of a head and a screw (cylindrical body with external thread) to be fitted with a nut for fastening two parts with through holes.This type of connection is called the bolt connection. If the nut is unscrewed from the bolt, it can also make the two parts separate, so the bolt connection is a detachable connection.
(2) screws:
A kind of fastener composed of head and screw can be divided into three types according to their uses — machine screws, setting screws and screws for special purposes.Machine screws are mainly used for fastening connection between a part with an internal threaded hole and a part with a through hole, without nut matching (this connection form is called screw connection, also a detachable connection;It can also be used with a nut for fastening connection between two parts with through holes.Set screws are mainly used to fix the relative position between two parts.Special purpose screws are ring screws for lifting parts.
The best material is 316 corrosion resistant stainless steel, followed by 304.Carbon steel is the next most common material.
The standard of hexagon nut and utility have what
As a standard part, nuts and rivets with pull mandrel have their own standards.Xiaobian on the hexagon nut standard is summarized for the difference and connection and their use.
For hexagon nuts, the commonly used standards are:
GB41 Ⅰ Hexagon nuts — Class C
GB6170 Ⅰ type hexagon nut — A, B grade
GB6171Ⅰ Hexagon nuts — fine tooth — grade A and B
GB6172 Hexagon thin nuts — Class A and B — Chamfered
GB6173 Hexagon thin nuts — fine tooth — grade A and B
GB6174 Hexagon thin nuts — Class B — No chamfering
GB6175Ⅱ type hexagon nut — A, B grade
GB6176Ⅱ type hexagon nuts — fine tooth — grade A and B
GB6177 Hexagon flange nuts — Class A
GB55 hexagon thick nut
GB56 hexagon ultra thick nut
GB1229 Hexagon nuts (high strength for steel structures)
1, ordinary hexagon nuts: widely used, characterized by large fastening force, the disadvantage is that there should be enough operating space in the installation, the installation can use a live wrench, open wrench or glasses wrench, the wrench above all need a lot of operating space.
2, cylinder head hex nut, is the most widely used in all the screws, because its binding force is larger, can use Allen key operation, the installation is very convenient, when used in almost all kinds of structure, more beautiful and tidy appearance, defect is slightly lower than outside hexagonal fastening force, also repeated use can't remove the socket head broken easily.
3, disk head hexagon nut: rarely used in machinery, mechanical properties of the same, mostly used in furniture, the main role is to increase the contact surface with wooden materials and increase the appearance of the ornamental.
4, headless hexagon nut: some structures must be used, such as the need for a large jacking force of the top wire structure, or the need to hide the place of the cylindrical head.
5, countersunk hex socket nut: mostly used in power machinery, the main role of the same hex socket.
6. Nylon lock nut: it is inlaid with nylon apron in hexagonal face to prevent loosening of thread. It is used in strong power machinery.
7, flange nut: mainly play a role in increasing the contact surface with the workpiece, mostly used in pipes, fasteners and some stamping and casting parts.
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