1 Introduction Roll Crusher Applications Roll Crusher Roll Crusher,Double Roll Crusher,Jaw Roll Crusher,Lab Roll Crusher Shenyang Sanland Mining Equipment Manufacture Co., Ltd. , https://www.sanlandcrushers.com
Figure 1 Spiral edge curve on a revolving plane
Therefore, E=ru2=f'2+g'2 F=ru·rv=0 G=f'2 It is noted that the tangent vector at any point on the oblique driving line is dr, and the warp tangent vector passing this point is dr. Considering that for the meridian dv=0, there is therefore dr=rudu|rvdv dr=rudu Since the inclined lead and the meridian form a certain angle j, the angle between dr and dr is the fixed value j, and the included angle is calculated as cos2j=(dr ·dr )2= Edu2 |dr||dr| Edu2 + Gdv2 After finishing, get Esin2jdu2=Gcos2jdv2 to get positive root dv=tanj(E/G)1â„2du=tanj[(f'2+g'2)1â„2/f ]du (2)
After integration, v = tanj ∫ u (f'2+g'2)1â„2 du + C u0 f (3) Where C is to be given according to the initial conditions of the specific problem, with the cutting edge curve between different turning surfaces. The continuous condition is the initial condition. Substituting Eq. (3) into Eq. (1), a general mathematical model of a blade curve with only one parameter and a fixed angle j with the meridian can be obtained. 3 The realization of the relative feed movement When the special rotary milling cutter is processed by non-NC, the machined milling cutter only performs the constant speed rotary motion. The forming of the spiral groove on the tool is performed by the grinding wheel at the same time as the constant speed rotation. To exercise to achieve. In addition, since the radius of the different rounding circles on the revolving surface is different, and the grinding wheel is usually designed according to the maximum rounding radius, it is necessary to grind grooves with different radii through the radial feed movement of the grinding wheel. Therefore, in the non-numerical machining of special rotary milling cutters, the relative feed motion refers to the combined movement of the grinding wheel with respect to the axial movement and radial movement of the milling cutter. Axial feed motion This article uses the face cam mechanism to realize the non-numerical axial feed motion of the special rotary milling cutter. The cam mechanism can produce the trajectory of a given function. The displacement function of the cam mechanism designed in this paper is based on the edge curve equation on the surface of revolution. Set the rotational angular speed of the cutter to be processed as w=dv/dt (v is the angle parameter in the edge curve formula (1)), and the rotary angular velocity of the cam during uniform rotation is w'. Let a'w '=w(a'> 0), then the general formula of cam displacement function can be obtained through the tool edge curve formula (3), the method is to satisfy the formula of the edge curve equation under the initial conditions v = v (u Inverse function u = u (v), and its substitution into the rotary surface edge curve formula (1) in the axial component z = g (u) = g [u (v)], can be obtained The displacement function of the cam. Because the design of the cutting edge curve of the cutting tool is smooth and continuous at the connection of two rotating surfaces, the cam displacement function derived from this is also smooth and continuous at the junction of the two turning surfaces. Radial feed motion Special rotary milling cutters Non-numerically machined radial feed motion is achieved by means of a master mechanism on a tool grinding machine. The radial feed rate changes with the radius of the swivel surface, ie the cutter radius is from R At 0, the feed rate is r→0 from the core thickness, so that only the revolving surface will appear without overcutting, and the remaining revolving surface will be easily compensated by the grinding wheel. Suppose the feed radius at the f(u) point on the surface of revolution is s, then the formula for solving the radial feed can be obtained according to the model curve equation s = r Rf(u) R-0. =r-(r/R)f(u)=r-(r/R)(x2+y2)1â„2 (4) Simply substituting the coordinates at any point on the surface of revolution into (4), we can find this The radial feed of the point. Because each rotating surface is smoothly connected and the cutting edge curve is smooth and continuous at the connection of the two rotating surfaces, the curve of the mold curve is smooth and continuous at the intersection of the two surfaces. 4 Examples of Solving The table below presents examples of the solution of the cutting edge curves and relative kinematics equations of two special rotary milling cutters (ball nose circular cutters and angled circular cone cutters). The meaning of the parameters in the table is shown in Figure 2 and Figure 3. q in the table is the angle value of the cam displacement curve between different turning surfaces.
Table Solving example Ball head circular arc milling cutter with corner round conical milling cutter Ball head Partial arc Rotary surface angle Circle surface Conical surface 
Figure 2 Ball end circular cutter 
Fig. 3 Tapered circular cone cutter
Roll Crushers are simple in design and construction, long-lasting, economical, and versatile. Roll crushing surfaces operate at a fixed distance apart, as opposed to the continually changing distances in a jaw or Cone Crusher. Product size is much more consistent. Both oversized pieces and fined are minimized. Wet, sticky materials are more easily handled.
The rolls act as flywheels, contributing to smooth operation and efficient use of power. Roll crushers are low in profile and relatively easy to install. They can be fed with a minimum of headroom, or even choke fed. Adjustments are simple. Internal parts are readily accessible.
Typical feed materials for Roll Crushers include: bauxite, cement clinker, chalk, cinders, clay, coal, glass, gypsum, limestone, burnt lime, rock salt, sandstone, shale, sulfur ore, sea shells, and sewer sludge clinker. Single Roll Crushers, sometimes called lump breakers, can also be used for breaking frozen or agglomerated materials.