How to calculate the wire cutting in the mold? What is the unit indicated?

Wire EDM ** is equal to the product of the cutting area and the processing fee per unit area. The cutting area is the area where the molybdenum wire is swept in the workpiece, equal to the length of the cross-section side multiplied by the height. The processing fee per unit area is generally the processing fee per square millimeter, which is not a fixed value and is related to the difficulty of processing.

I'm usually pennies per square millimeter here. For example, if you cut a rectangle with a length of 40 mm, a square cross-section, and a height of 30 mm, the processing fee per unit area is:

Yuan square millimeter, then the total ** is: 4 * 40 * 30 * equal to 480 yuan.

I have been doing wire cutting for many years, and I have run a lot of places, ** is generally the cutting area multiplied by your wages! That is, the circumference of the cut is multiplied by the height of the workpiece to get the cutting area, and then multiplied by your price is your income**! Generally, the ** in Zhejiang is between yuan per square millimeter to yuan per square meter!

That is, every thousand square meters of Haomi is about between yuan and 6 yuan!

The exact price depends on where you are! You can't do that when you cut thin plates! Otherwise, you'll lose!

1---2 mm sheet and you're ready to do it in time! You can charge about 13-15 yuan an hour! If the cold stamping die requires taper processing, it is a little more expensive!

Generally, it is about 10 yuan per thousand square millimeters!

It is calculated by the square of the area of the cut. It is generally 9 cents per square millimeter.

How many square millimeters are processed per hour and then charged by the hour.

Hehe, it's not that expensive, we have a transaction in Guangzhou yuan square millimeter (fast wire) I haven't heard of it since 1998. If things go slowly, there may be.

It's usually 9 cents a square millimeter.

The machining accuracy is significantly affected by the mechanical transmission accuracy, and the displacement accuracy of the machine tool coordinate table and the motion accuracy of the electrode wire directly affect the machining accuracy. The displacement accuracy of the coordinate table of the machine tool depends on the manufacturing and assembly accuracy and the degree of wear of the lead screw nut pair, gear pair, guide rail pair, etc. The motion accuracy of the electrode wire is significantly affected by the rotation accuracy of the guide wheel, the uneven wear of the guide wheel, the loosening of the electrode wire and the discharge force.

In addition, the diameter of the electrode wire, the size of the discharge gap, the stability of the processing feed control, the size of the working liquid jet flow and the jet angle also affect the machining accuracy. The main factors that affect the surface roughness are as follows:

1) The processing speed is too fast and the roughness is large; Improper selection of pulse power supply parameters, excessive energy of a single pulse, and large roughness.

2) The accuracy of the guide wheel and its bearing is reduced due to wear, and the resulting high and low fringes seriously affect the roughness of the machined surface.

3) The loss of molybdenum wire is too large, and the thinner molybdenum wire moves in the guide wheel.

4) Improper adjustment of feed speed and unstable processing.

1.Structural characteristics of wire cutting molds.

1) When the wire cutting process is adopted, the punch and die can adopt an integral structure. This is beneficial to improve the strength of the mold, simplify the mold structure, and shorten the mold manufacturing cycle.

2) The punch processed by wire cutting can only be a straight type. The punch fixing plate can also be processed by wire cutting. In order to ensure that the punch and the fixed plate have a certain connection strength, the punch and the fixed plate should be a transitional fit, and the interference amount is generally; If the size of the punch is large, the screw hole can be processed at the rear of the punch, and the screw hole can be fastened to the fixing plate or backing plate.

3) Wire EDM with cutting slope device can process parts with taper. In order to reduce the amount of wire cutting processing, the cutting edge thickness of the die can be thinned by milling the leakage hole on the back of the die before quenching, or the leakage hole can be pierced on the back of the die by using an electric spark after wire cutting.

4) The concave angle of the wire cutting mold can not be cleared. In wire EDM processing, due to the existence of the radius r of the electrode wire and the δ of the discharge gap, the clear angle cannot be obtained at the concave corner of the workpiece, but the arc with a radius of r δ. Because the radius of the arc is very small, it is left and right, and it does not affect the use of the mold.

There are many factors that affect the processing speed, machining accuracy and surface roughness of wire cutting processing, among which the most important ones are machine tool accuracy, power supply parameters, working fluid, operation technology, etc. The processing speed, that is, the productivity, is directly related to the waveform and electrical parameters of the high-frequency pulse power supply, and the increase of individual pulse energy and pulse frequency can improve the processing speed, but it is also subject to certain constraints. In addition, the type, concentration, degree of contamination and jet flow of the working liquid; The material, diameter, wire speed and jitter of the electrode wire; workpiece material and thickness; The stability of the machining feed speed and the transmission accuracy of the mechanism also affect the processing speed.

When wire cutting processing is the main process, the processing route of steel materials is: blanking - forging - annealing - mechanical roughing - quenching and tempering - grinding - wire cutting - fitter dressing. The characteristics of the above-mentioned process route are:

In the whole process of machining, there will be two large deformations of the workpiece. First, after annealing, the residual stress inside the material will increase significantly. The other is the removal of a large area of metal or cutting off by wire cutting after hardening, which will destroy the relative equilibrium state of the internal residual stress of the material and produce a second large deformation. Residual stress is sometimes more serious than the impact of factors such as machine tool accuracy on machining accuracy, which can make the deformation macroscopic visible, and even the material will explode during the cutting process.