What to do if there is often a need to process one or another metal part of the required quality, but there is no machine at hand that, being easy to operate, would produce a high-quality result? - Don’t think that these are pipe dreams! Of course, new equipment is expensive (or very expensive), and the purchase may not pay off even in the long term. But there is a way out! — Avito offers a range of lathes that have already been used, but are still operational.
Buying a used TV 320, which has been tested by time and has proven its usefulness, is a real opportunity due to the significant difference in price. Affordable and achievable.
Description
TV 320 is a special-purpose high-speed machine. It differs favorably from similar units in that the TV 320 makes it possible to make maximum use of its technological parameters when processing metal parts at high speeds. You can sharpen and perform several operations simultaneously. The high-speed mode is the main secret of the efficiency (maximum productivity and cleanliness of processing) of the TV 320 machine.
There are two rows of cutters on two tool holders - in front and behind. It is permissible to install the rear one on a caliper. To grind the taper, the central part of the tailstock is shifted laterally.
TV 320 can be used to perform an extensive list of actions:
- production of tools;
- production of devices;
- operations;
- cutting metric and other threads;
- turning cones...
For the operation of TV 320, power and power load limits have been established, exceeding which is unacceptable:
- power limit (main propulsion motor) - 2.8 kW;
- the tensile strength of turning depends on the method: longitudinal - 220 kg, transverse - 612 kg.
The TV 320 machine will be a pleasure to work with for those who are content only with high-precision work. All its structural elements are made to high standards. Main parts: bed,
- lead screw,
- spindle unit,
- front bearing,
- gear wheels.
Strengths and weaknesses of the model
The 2m112 tabletop drilling machine has proven itself well. It is preferred by many domestic specialists. The fact that individual devices have operated for more than thirty years testifies to the reliability of this unit. Today we can highlight the following advantages of the tool:
- the main advantage is high endurance. The machines remain operational even in harsh conditions;
- Simplicity of design comes second. Thanks to its optimal design, the product does not require constant maintenance. In addition, disassembling the machine will not be difficult;
- The availability of spare parts on the modern market is also important. Even in the event of a breakdown, which is rare, it is not difficult to find a spare part. In addition, you can carry out repairs yourself;
- good power rating. The power of the drilling tool allows it to be used not only for everyday use, but also as a tool for small industries;
- value for money. Today you can buy good quality used tools at an affordable price.
Details
However, in more than thirty years since the start of production, the 2m112 machine has become obsolete. Its accuracy, efficiency and performance are inferior to modern Japanese and European instruments. This circumstance is the greatest disadvantage of this drilling machine.
Thus, the 2m112 tabletop drilling device went into production in 1980. The reliability of the machine has led to the fact that today it continues to maintain its popularity in the post-Soviet space.
Excellent technical characteristics, combined with affordable, valuable used models, make the tool the optimal choice for equipping small-scale production or a home workshop. However, in comparison with other modern machine models, this tool is already obsolete.
Device
Bed.
Photo 1: bed.
A machine weighing 900 kg, on which high-precision machining of metal parts is carried out, has reasonable requirements for stability as a guarantee of safe operation. From this point of view, not a single consumer made any complaints about the TV 320 box-shaped cast iron frame. The rigidity of the frame inside is further reinforced by powerful diagonal ribs. It is held in place by a pair of cast iron stands. At the top there are four guides: three of them are prismatic, and the last one is flat. Let's look at the main nodes.
Front (spindle) headstock.
Photo 2: headstock.
Solid cast iron.
The spindle is a cone-shaped neck on an empty pipe. In its front support there is a plain bearing, and at the rear there is another bearing - a high-precision angular contact bearing. And there is a third one - the thrust bearing. The speed switch is located in front of the spindle head, and the feed box is placed behind it. There are two working directions. Changing the direction (direct - reverse and vice versa) does not affect the set amount of rotation and is carried out by a mechanism on the left in the headstock, the operation of the bearings of which is regulated by special nuts.
Turners consider the spindle to be a technically satisfactory unit.
Caliper.
Photo 3: caliper.
The support is the place where the cutting mechanism is fixed, the carriage of which, after fastening, can be moved longitudinally and transversely.
Longitudinal movement can be mechanical or manual. The inner two T-shaped grooves are provided for installing an additional cutter. The transverse movement is performed by a cutting slide, and its value is adjusted by two stops: a ball stop and a transverse one. The first makes it easier to check indicators, and the second makes it easier to process a series of parts.
Apron.
Photo 4: apron.
Located in front. A device that eliminates the risk of breakage when the lead screw and roller are unexpectedly turned on at the same time is placed in the caliper. The master nut is only activated when the switch handle is in the middle.
Overloads in the apron cause automatic shutdown: the “falling worm” is activated.
Gearbox.
Photo 5: gearbox
Thanks to this structural mechanism (three shafts and two gear blocks), the spindle assembly rotates (nine speeds). You can adjust the tension of the belts that transmit rotation by moving the box body along the provided grooves.
By loosening the fixing bolts, you can move the box.
The clearances of the bearings located in the box shaft supports are adjusted by screws and nuts. This makes the shafts easier to bear loads (axial, radial).
The standard equipment is designed to apply metric threads. And additional gears - a different thread. You can select the one you need using the instructions. To do this, you will need a table on the cover of the guitar.
Tailstock
The only way to move it longitudinally is manually. It may be necessary when processing a long workpiece, the right edge of which can be supported in this way and the cutting tool can be secured with an eccentric mechanism.
By moving the headstock transversely, the conical surfaces are processed. And longitudinal movement is provided by a screw connected to a nut, which is rotated by a flywheel. The quill moving inside the headstock is fixed by two clamping pins connected to the control handle.
If you need to repair the tailstock yourself, you should first watch the video:
Additional accessories.
What and how you can install is worth watching in the video:
User manual
The equipment cannot be used or serviced unless you have unplugged it. The machine must be maintained at least once a month. This means that if you decide to purchase such equipment for yourself, you should clean it and inspect it for condition every 30 days.
Also watch the video regarding the operation of TV-16.
Equipment contacts are made from materials that contain silver. Consequently, the operator is not required to carefully care for their condition. There is no need to adjust them either, and if they suddenly wear out, they simply replace them with new ones. If you clean the contacts, blackening will occur, which will undoubtedly affect the performance of the equipment.
To prevent rust on the surface of the machine, the interface between the core and the armature should be coated with machine oil. After this, everything is wiped with a dry cloth so that the oily substance does not provoke gluing of the armature and the core.
Important! The spindle should not create any play during operation.
A complete inspection of equipment and repair of components must be performed at least once a year. Bearing lubricants are changed after 40,000 operating hours. It is better to use lubricant grade 158 TU 38 101320-77. In order for all bearings to function normally, the operator should fill the oil reservoir to 2/3 of its volume.
Advice! Preventive inspection of the unit should be carried out once every 6 months.
Preventive repair of the machine.
In addition to routine inspection, you need to periodically review the condition of the switch, look at the surface of the nuts and other joints to monitor how they are in working condition.
- If the connection points are clogged, you should clean them so that later the bolts can be easily unscrewed without tension and the risk of stripping the threads.
- If the bolts are loose, the operator needs to tighten them, otherwise the machine may rattle, which will affect the accuracy of sharpening or turning the part.
- Carbon deposits and other traces of work should be removed from working surfaces to avoid problems with the machine later.
All these precautions will enable you to significantly increase the service life of such a machine and improve the quality of the parts processed on it.
See information about Easton hockey sticks on our website.
Important! To avoid problems with damage to wires, it is recommended to clean the electrical cabinet from dust that accumulates there once every 3-4 months.
Epilogue
Unfortunately, or maybe fortunately, I sold the TV-16. Sold by local standards for a good price, but with all the equipment. It seemed like it was a mistake, but it didn’t seem to be. Now I am again wandering through flea markets in search of equipment, tools for a new machine...
I sold the machine on a local flea market site like Avito, for a long time and at an expensive price. They ended up buying it! The first month I was very uncomfortable, since the machine became part of the house. I really missed something somewhere in my soul, so I again started looking for a TV-4, TV-6, TV-7 machine, in general, as luck would have it. And after a while I finally found the TV-6 option. I will write about it separately. In the meantime, I want to give a parting word to those who have a TV-16 on rolling bearings. Do not sell your brainchild, it is better to invest in its modernization. The machine is very good for hobby purposes.
Design features of the machine
TV 320 is manufactured according to the classic design of a screw-cutting lathe. However, it has a number of serious design differences from its analogues.
Steel panel radiators were invented at the end of the last century. This was facilitated by new developments in the technology of producing steel sheets, welding, and painting. Consumers wanted a radiator with higher performance than cast iron. Steel radiators have begun to carve out their niche in the heating equipment segment.
Firstly, this is the high-speed sharpening system already mentioned above and changing feeds without interrupting work. Also, the structural features of this high-precision machine include:
- Installation of two incisors simultaneously with a change in position;
- Mounting on the faceplate for cartridges with a thickness of 120 and 150 mm;
- The presence of sliding bearings that limit friction;
- Autonomous oil supply system;
Electrical equipment
All electrical equipment of screw-cutting lathe 16 is designed for the use of power units. It is connected to a three-phase network. To ground the device, an ordinary neutral wire is used. It helps protect not only from short circuits, but also from network overload, as well as a number of other factors of electric current breakdown. The complete connection diagram is visible in the photo below.
To provide contacts, relay contact equipment is used. It hides in the electrical cabinet, which is located on the back of the machine. You can see it on the headstock housing of the equipment.
Before making a test run, you should make sure that the network frequency and voltage fully comply with all TV-16 parameters. It is permissible to connect equipment to the network using copper wires, which in cross-sectional diameter are equal to those of the conductors in the machine circuit. The grounding is connected using a bolt, and before starting, the operator needs to make sure every time that everything is fine with the connection.
TV-16 electrical circuit diagram of the machine
Symbols for the TV-16 electrical circuit.
