The principle of cold rolling small-module involute splines on a thread rolling machine. L and R are a pair of involute rolling wheels with identical parameters, mounted on the two main spindles of the thread rolling machine, and can rotate synchronously in the same direction under the drive of the transmission mechanism. The R wheel can be driven by a hydraulic cylinder for radial feed motion, and the L wheel can be adjusted to coincide with the indentation of the R wheel on the surface of the workpiece P. The workpiece P is positioned and clamped by two center holes. Adjusting the fixture allows the workpiece to move axially. Under force, it can swing by an angle Φ around an axis parallel to the machine tool spindle through point O on the fixture, ensuring that the workpiece remains in a free rolling state with the two rolling wheels during the cold rolling process, while also facilitating workpiece clamping.
The structural dimensions, geometric tolerances and technical requirements of the rolling wheel are formulated with reference to the thread rolling wheel and cylindrical measuring gear. The common normal length or span M of the rolling wheel is calculated according to the spline data in the gear manufacturing process. The required material can be Cr12MoV (hardness 59~62HRC).
Z28-250 Rolling Threading Machine specification sheet
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Items |
Parameters |
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|
diameter |
φ80mm |
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|
thread pitch |
8mm |
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|
Spindle Angle |
±10° |
|
|
Maximum rolling pressure |
360kn |
|
|
Spindle RPM |
Exchange gear 22/28/35/45/56/70rpm |
|
|
Thread rolling wheel range |
diameter |
φ220mm |
|
aperture |
φ75mm |
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|
Maximum width |
150mm |
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|
Spindle drive power |
15kw |
|
|
Hydraulic transmission power |
7.5kw |
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|
Physical size |
1950*1700*1550mm |
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|
Machine weight |
3100kg |
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Yushi Rolling Threading Machine advantages compared with other supplier
The sliding base plate is thickened, with the thickness increased by about 40% compared to the original, making it more stable and durable. The top part is made of ductile iron casting. The sliding track uses tapered strips and a dovetail structure, making the slide rail more stable and durable during operation.
This tool uses a worm gear to adjust the stroke, which can achieve fine adjustment of the thread depth during workpiece processing. The handwheel only adjusts 0.2mm with one full rotation, while the original one adjusted 3-6mm with one rotation, a difference of 15-30 times in adjustment accuracy. The adjustment of the mold distance is very rough, and if the thread depth is slightly different, it is difficult to adjust. Either it is adjusted too deep and the material bounces up, or it is adjusted too shallow and it is difficult to tighten the nut.
The original 39mm diameter return rod with spring was replaced with an 80mm diameter double-acting hydraulic cylinder piston rod. The original rod was prone to breakage when performing heavy lifting or prolonged tasks, posing a safety hazard if someone was standing near the machine and could be injured. The improved model eliminates this issue of return rod breakage.
The hydraulic structure is bidirectional hydraulic, with high pressure for forward movement and low pressure for reverse movement during operation. Both forward and reverse movements are hydraulically controlled, achieving separation of high and low pressure, protecting the equipment, and reducing oil temperature. The hydraulic system is the same as that of the Z28-200, Z28-260, and Z28-280 large thread rolling machines, making it more stable and durable.
Company Profile
Packing & Delivery for Rolling Threading Machine
Packaging : standard export wooden case packing. you can by sea or air. We have our own farwarder. We can check the delivery information timely. You can also use forwarder by yours. We will contact with him ASAP.
Delivery time:6-10 days after receiving the deposit.
FAQ
Can you customize the machine for us?
Yes, we are factory, we can customize the machine depend your request.
Can your technician come to our country to install and adjust the machine?
Yes, our technician can go to your country to help you install and adjust machine.
How long is the warranty?
Warranty 12 months. In period of warranty, we change the new parts for broken parts for free. We provide technical support for long-life.
If the machine has a problem, how long will it get a reply?
We will provide solutions within 24 hours.
Can I go to your factory to check the machine?
Of course, you are always welcome to come to our factory.
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