Cam splitter selection, the main parameters of cam splitter selection

How to select the cam splitter.

The main parameters of cam splitter selection: load capacity, torque.

1. Load-bearing capacity: that is, the force, which is also commonly used to express dynamic torque and static torque, which is related to the bearing capacity used by the cam splitter, all the weight of the splitter must be calculated, and the turntable, workpiece, fixture and the pressure to be applied to the workpiece in the production process are transferred to the turntable and finally to the splitter.

2. Torque: the torque of the cam splitter is very important, the torque is determined by the speed and the weight of the workpiece fixture, if it is too small, the whole transmission will be affected, the main force part of the splitter is the cam, so the cam and curve of the cam splitter, the size and installation size of the driven wheel, that is, the difference between the size and model in the selection.

Application classification of cam splitters

1. Drive the disc to rotate.

This application is the most common and is flanged and included (DF), platform desktop (DT), ultra-thin platform desktop (DA), cylindrical (Y). The following data needs to be provided during the selection: disc diameter; The number of stations, the number of times the disc rotates and stays; the number of stations, the number of times the disc rotates and stays; the number of stations, the number of times the disc rotates and stays; Indexing time, the time it takes to get from one station to the next.

2. Drive the chain and track to rotate.

For this application, the main options are mandrel type (DS) and parallel conjugate type (PU). The following data needs to be provided during selection: sprocket diameter; the number of stations, the number of times the sprocket rotates and stays; Total load, including chain weight, chain, track length, product weight; Total load, including chain weight, chain, track length, product weight; Total load, including chain weight, chain, track length, product weight;

1) Features of the cam splitter: 1. Simple structure: mainly composed of two parts: three-dimensional cam and splitting disc.

2. Accurate action: no matter in the dividing area or the static area, there is accurate positioning. No additional locking elements are required.

The dynamic/static ratio and the number of divisions can be arbitrarily determined. 3. Stable transmission: the motion characteristics of the three-dimensional cam curve are good, the transmission is smooth and continuous, the vibration is small, and the noise is low.

4. High output segmentation accuracy: the output accuracy of the splitter is generally 50. The highest can be up to 30.

5. Good high-speed performance: the three-dimensional cam and the splitter wheel belong to the gap-free meshing transmission, with low impact and vibration, and can achieve high speed, up to 900rpm6. Long life:

The splitter has a standard service life of 12,000 hours. (2) Installation of cam splitter: 1. Installation of the body

1) The splitter is a high-precision segmentation mechanism obtained by precision machining and correct assembly adjustment. Before use, the user shall not adjust, disassemble or assemble without authorization. (2) Confirm whether there is any damage to the installation surface of the splitter, and if there is damage, trim it with a stone stone.

3) Align the position of the input and output shafts, add positioning pins, and tighten the screws evenly. (4) The splitter bears the effect of pulsating load moment, and the installation must be very firm. Due to the high perpendicularity or parallelism of the mounting surface of the splitter relative to the input and output shafts, the installation base surface of the equipment must ensure that the direction of the input and output shafts of the splitter is coaxial with the input and output directions required by the equipment.

Must not be skewed or eccentric. Otherwise, it will not only affect the output accuracy, but also seriously damage the splitter. Because at this time, the splitter is in an abnormal state of stress.

2. Installation of input and output shafts: The connection related to the input and output shafts of the splitter should be a connection with good rigidity in the direction of rotation, no reverse impact, and stable rotation. Pay attention to the connection of turntable, sprocket, pulley, gear, flange and other connections on the input and output shafts of the splitter.

1. The splitting principle of the cam splitter is that the cam pushes the cutting of the object, and the splitting principle of the fourth axis is that the blade on the disc completes the object division by rotating;

2. The cam splitter can divide the processed parts with different specifications and roundness, but the installation of the fourth axis product requires high precision, uniform shape specifications, and consistent shape roundness;

3. In terms of maintenance, the cam splitter does not need to replace the blade, only needs to maintain the cam, and the fourth axis needs to replace the blade on the disc and regularly test the flatness of the disc;

4. In terms of **, the cam splitter is cheaper than the fourth axis, but the segmentation accuracy of the cam splitter is slightly lower than that of the fourth axis.

A big factor affecting the segmentation accuracy and life of the splitter is the adjustment. The factory product of the splitter is obtained by carefully assembling and adjusting the precision machined parts. Improper adjustment will affect the segmentation accuracy, resulting in impact and noise, and damage to the splitter to achieve the expected speed and bearing capacity.

This shortens the life of the splitter.

1. Adjustment of the distance between axes:

If there is a gap in the positioning work area due to long-term use and wear of the splitter, this gap should be eliminated by adjusting the distance between the shafts. This can be done by synchronously adjusting the eccentric sleeves at both ends of the input shaft.

2. Adjustment of input and output axial position

The axial position of the cam splitter can be adjusted by adjusting the lock nuts on both sides of the cam or the bearing gland on both sides of the input shaft. The axial position of the split wheel may be adjusted by adjusting the bearing gland at both ends of the output shaft or the lock nut at the rear end.

When choosing a splitter, be aware of these parameters:

1.The number of splits (which indicates how many workstations are needed) is also the number of stations of the splitter.

2.The angle at which the input shaft drives the output shaft to move is the driving angle of the splitter, which refers to the angle at which the input shaft drives the output shaft to rotate.

3.Ingress of the axis of force per minute: The number of revolutions per minute that the inlet axis drives the output axis.

4.The diameter, thickness and material of the disc should be filled in according to the actual situation of the automation system. Most of the materials mentioned here are made of iron or aluminum plates.

Some automation systems also use plastic or acrylic sheets, etc., and the total weight of the entire disc can also be reported to the cam splitter selector.

5.The weight of each group of fixtures and workpieces should be filled in according to the actual usage.

6.The pitch diameter of the fixture and workpiece refers to the radius from the center point of the disc to the center point of each fixture and workpiece.

According to your parameters, 45df is about the same, and you don't need to choose a big motor. The calculated horsepower is only a reference, and the final one depends on the actual situation. The minimum drive angle is only 90 degrees.

The driving angle you calculated based on that time is not correct. If something is made, the drive angle can't be changed, but your stop time can be controlled with the inverter. If you don't have high requirements, you can buy domestic splitters and motors, which are very cheap.

Pay attention to the elements, if you want to look at this, if you want to check the gap of him, if the other words, whether his space is large enough, you can open it, and then enter this to see this point, what do you need to pay attention to?

The indexing cam installed in the input shaft is connected with the output turret (as shown below), and the cam rollers that are radially embedded on the circumferential surface of the output turret make linear contact with the taper support ribs of the cam in their corresponding inclined planes.

When the input axis rotates, the cam rollers rotate the output turret according to a given displacement curve while rolling along the inclined plane of the ribs. In the area where the rib is balanced with the cam face, i.e. in the static range, the rollers are connected to their shafts, but the output turret itself does not rotate. The taper support ribs are usually in contact with two or three cam rollers so that the rotation of the incoming axis can be evenly transmitted to the outgoing shaft.

If there is an irregularity between the cam surface of the taper support rib and the cam rollers, the splitter can be damaged. By adjusting the distance between the shafts, it is possible to eliminate the phenomenon of unsmooth rotation. The elastic zone of the cam rollers and cams can be approached by adjusting the preload, thus increasing the rigidity of the splitter.

Its structure and function are the best performance of the combination of indexing cam and cam rollers, which can be operated at high speeds.

Terms and Definitions.

1.Indexing cam:

The groove is cut into the surface of the cylindrical solid body and fixed to the cam of the force shaft.

2.Taper support ribs:

The tapered rib is located on the circumference of the tapered support rib, between the cam grooves, in linear contact with the circumference of the cam rollers.

3.Cam rollers:

Precision-engineered cam roller bearings designed to withstand heavy loads.

4.Output turret:

Output turret attached to the output shaft. The indexing cam rotates by driving the rollers that are radially embedded in it. Its accuracy is the most critical factor in maintaining the accuracy of the splitter.

5.Number of stops:

The number of stops per rotation of the output shaft.

6.Drive angle (cam indexing angle):

The rotation angle of the input axis requires a indexing movement, and the larger the angle, the more stable the movement.

7.Stop Angle:

The angle at which the input axis rotates when the output axis is fixed. The sum of this angle and driving angle is 360 degrees.

8.Number of Rotations:

The number of rotations of the axis of the input force.

9.Rotational torque:

In a fixed position, the maximum torque can be applied to the output shaft. If the applied torque is greater than this value, the splitter will be damaged.

10.Dynamic torque:

The maximum torque acting on the output axis during indexing.

The cam splitter is designed in such a way that the cam mounted on the input shaft engages with the needle roller bearing, which is firmly attached to the index plate of the output shaft. The needle roller bearing, which is radially embedded in the circumferential surface of the indexing disc, makes linear contact with the corresponding inclined plane of the cam.

When the input shaft rotates, the cam rotates according to the given displacement curve, and the two sets of needle roller bearings of the index dial, when riding in a straight cam line, that is, in the static range, the needle roller bearings rotate, but the index dial itself does not rotate.

When the cam rotates to the position where the curve is located, it is usually converted from two cam rollers to three cam rollers, so that the rotation of the output shaft can be evenly reported, and the force is reported to the output shaft.

By rotating the preference sleeve that supports the output shaft and adjusting the spacing between the input and output shafts, it is possible to remove signs of non-smooth rotation. By adjusting the preload, it is close to the elastic zone of the needle bearing and cam to increase the rigidity of the splitter.

There are countless curves in space that connect two points. However, when measuring the degree of activity, it is necessary to make use of the curve even if it is stable. For this purpose, the vibration, noise and rigidity of the material should be considered. Load and rate should also be considered.

After considering all the factors, it is common to accept curves that exaggerate the speed, acceleration, and runout performance. Speeding up, dealing with the accuracy of the splitter and the life of the cam and needle roller bearings have a particularly stressful effect. The displacement curve shows the relationship between the displacement of the input shaft, the time of rotation and the angle of rotation and the displacement of the output shaft.

Non-continuous curves: Includes constant rate curves and constant acceleration surfaces. These curves are not necessary, and the rate and acceleration rate are not in contact, resulting in a big hit.

Double Static Symmetry Curves: Includes circular curves and corrected irregular quadrilateral curves. In terms of velocity and acceleration, these curves are continuous, so they are necessary. In addition, if the rotational bias of the input shaft is reversed first, a similar activity can be obtained.

The representative of DS is the flanged mandrel type, and the output shaft is often connected by a belt or chain, but DF is different, and the output shaft is often connected with a disc.

The cam splitter is a mechanism that realizes intermittent motion, which has high indexing accuracy, stable operation, large transmission torque, and self-locking when positioning

Compact structure, small size, low noise, good high-speed performance, long life and other significant characteristics, it is an ideal product to replace traditional mechanisms such as sheave mechanism, ratchet mechanism, incomplete gear mechanism, pneumatic control mechanism, etc. This product is widely used in pharmaceutical machinery, automatic feeding mechanism of presses, food packaging machinery, glass machinery, ceramic machinery, tobacco machinery, filling machinery, printing machinery, electronic machinery, automatic tool changer of processing centers and other automatic machinery that needs to convert continuous operation into stepping action. Its mechanical structure:

An input shaft, cam pair, output shaft or flange driven by a motor. The turntable for mounting the workpiece and positioning the clamp is mounted on the output shaft. The cam splitter belongs to a kind of space cam indexing mechanism in the structure, and mainly realizes the following functions in various automatic machines:

1.Intermittent conveyance in the circumferential direction 2Intermittent conveying in a straight line 3

Oscillating drive manipulator.

The output is straight, and df, means that the output is flanged.

Selection of cam splitter: DS represents the cam splitter of the mandrel type; DF stands for flanged cam splitter; p denotes parallel cam splitter.