Function application of disc spring products:
BAUER Disc Spring (Bauer Disc Spring)
The standard series disc springs (DIN2093 standard size) include the 146 grid size series from 8mm to 250mm in outer diameter. The materials used are CK67 and 51CrV4, and they are all stocked and can be shipped directly from the warehouse. The standard surface anti-corrosion coating is phosphated And oiled.
The special series of non-standard disc springs include the 153 grid size series with an outer diameter from 70mm to 600mm. The special series of disc springs can be directly supplied from the warehouse, but the warehouse is equipped with production molds, which can be processed according to the order. Standard surface anti-corrosion The coating is phosphated and oiled.
The function of disc spring
The shape of the disc spring is a conical disc shape, which is different from traditional springs. It has its special function in function. The main features are large load, short stroke, small space required, convenient combination and use, easy maintenance and replacement, economic safety High. It is suitable for precision heavy machinery with small space and large load. The best use range of its compression stroke is between 10%-75% of its maximum compression stroke.
One, disc spring characteristics
The stroke is short and the load is large. The space required is small. The combination is easy to use. The maintenance and replacement are easy. Economical and safe.
2. Surface treatment:
General surface treatment: add lubricating oil after phosphoric acid treatment
Extraordinary surface treatment: galvanizing, steel, enamel, metal film, baking varnish and other electroplating may produce a carbonized layer, if extraordinary surface treatment is required, please discuss with our company.
The standard material CK67 is used for thickness less than 1.25mm in accordance with DIN2093, and it can also be applied to the thickness of mm under extraordinary circumstances if the customer needs.
The most advanced spring material, 50CrV4, can guarantee that the spring is very good under the working temperature of 15℃ -150℃. It is suitable for the thickness of the disc spring below 6 mm
Four, design attention matters:
1. When the disc spring uses a series combination, there must be an inner guide post or an outer ring, and the inner guide post or outer ring must be heat treated to HRC52 degrees before grinding and polishing.
2. The clearance tolerance between the installation of the guide post and the shrapnel can be found in the table below
Five, combined spring characteristic curve
(A) The three-piece parallel stacking method, the stroke is 1 piece, and the elasticity is 3 times.
(B) Four-piece stacking method in series, the stroke is 4 pieces, and the elasticity is 1 time.
(C) Three-piece parallel stacking method, the stroke is 3 pieces, and the elasticity is twice.
(D) is that the gradual curve of the parallel stacking method is parallel to the disc springs of different thicknesses, which are combined in series to form a progressive curve.The weaker spring must be designed to protect against overload.
6. Friction coefficient and shock absorber
A. Constant and instant hits will reduce the life of the spring.
B. When the spring is overloaded or the pressure is quickly relaxed, the spring will be hysterical and scratch the spring.
c. The calculated elastic force is displayed. The travel table takes a 25X12.2X0.9 mm reed as an example. The comparison of 4 parallel stacks in 4 groups and 2 parallel stacks in 4 groups can clearly see the increase in friction , The more pieces are stacked in parallel, the greater the friction will be.
Seven, the relationship between the compression and the life of the disc spring
The compression of the disc spring should work within the range of 10%~75% stroke as much as possible
In a large range, disc springs are replacing cylindrical spiral springs. They are often used in heavy machinery (such as presses), artillery, aircraft and other weapons, as powerful buffers and damping springs, and used as clutches and safety valves for vehicles and tractors. The compression spring and the energy storage element used as a motorized device.
Disadvantages: The load deviation is difficult to guarantee.
Disc springs can be divided into three categories according to the different cross-sectional shapes: including ordinary disc springs (the cross-sectional shape is rectangular), disc springs with radial grooves, and trapezoidal cross-section disc springs. Common disc springs are divided into: There are two types of support surface and unsupported surface; the disc spring with radial grooves is based on ordinary disc springs, and several uniformly distributed grooves are opened in the radial direction. The grooves can be opened from the inner hole to the outer circle. It can also be opened from the outer circle to the inner control direction; the trapezoidal cross-section disc spring can be divided into two types: the inner edge thickness is greater than the thickness of the external aid and the inner edge thickness is less than the thickness of the outer circle. Due to the deformation of the single-piece disc spring and The load value often cannot meet the requirements of use. At this time, it can be used in groups to form a disc spring assembly (column). The typical combination method is: stack combination disc spring, composite combination disc spring and other combination disc springs.
Compared with cylindrical coil springs, disc springs have the following characteristics:
One, the load deformation characteristic curve is nonlinear.
Second, the disc spring is in the shape of a thin plate, which is easy to form an assembly, and can be assembled and replaced in a modular manner, thus bringing convenience to maintenance.
Third, the disc spring with radial groove has the characteristic of zero stiffness. This characteristic can be used in a certain deformation range where the spring force is basically stable.
Four. The vibration absorption performance of the disc spring is not lower than that of the cylindrical coil spring. When the laminated combination is used, the friction between the disc springs will have greater damping and dissipate impact energy.