2, learn the correct use of lathe, and can correctly use the workpiece processing method.

Turner preparation knowledge:

A, lathe worker safety knowledge

1, wear work clothes to work, girls wear work hats, and put their long arms in the hats.

2, must concentrate at work, are not allowed to leave the machine without authorization.

3, the workpiece and turning tool should be clamped firmly, so as to avoid the workpiece and turning tool flying out and hurting people.

4, the workpiece rotation, are not allowed to measure the workpiece.

5. After the workpiece is installed, the three-jaw wrench must be removed conveniently, so as to avoid accidentally starting the lathe, so as to avoid the wrench flying out and hurting people.

6, are not allowed to go to work, stick to your post.

Second, the theoretical knowledge of lathe operators

1. Lathe worker: a worker who operates a lathe and processes mechanical products on it.

2. What is a turn? It is a cold working turning method that changes the size and shape of the workpiece blank by using the rotating motion of the workpiece and the feeding motion force of the tool.

3, lathe model standard notes and instructions

C W 6 1 40

Lathe characteristics: the model code of the universal flexible lathe group indicates110 of the maximum machining diameter.

Table lathe type

4. Lathe parts: spindle box, change gear box, carriage box, carriage box, tool rest, tailstock and carriage (large, medium and small) with three rods (line and light). Control), bed, accessories.

5, lathe maintenance and maintenance

① Lubricating oil ② Check whether the machine tool is in good condition ③ Anti-smashing ④ Cleaning ⑤ Turn off the power supply.

Third, the workpiece

Name processing content tool

1, φ 30 0.5 90 degrees for vernier caliper of cylindrical turning tool.

2, turning steps (line drawing positioning) turning φ22 and φ 17 90-degree cylindrical turning tool vernier caliper.

3. Turning circular turning tools r 105 and r 135.

4, plastic file plastic file, emery cloth

Four, lathe general provisions:

(1) Seriously:

1, workpiece alignment, only use manual chuck or turn on the lowest speed alignment, do not turn on the high speed alignment.

2, processing bar, bar shall not be too long, generally not more than 300 mm at the back of the spindle hole advisable, and wood chips to clip it in the spindle hole. When it exceeds 300 mm, it should be supported by a bracket, and it can only be handled after it is confirmed to be safe, but it is not allowed to drive at high speed.

3. When processing deviated workpieces, they should be properly matched and fastened firmly. Turn the chuck by hand to check the accessibility, and then turn it at a low speed to confirm that the counterweight meets the requirements before processing.

4. When clamping the workpiece with the tailstock thimble, the extension of the tailstock sleeve shall not exceed twice the diameter of the sleeve, and pay attention to locking.

5. When drilling with tailstock, it is forbidden to use lever to turn the handwheel to feed.

6. When loading and unloading heavy workpieces, block them with boards on the bed surface to prevent accidents.

7. When loading and unloading the chuck, only the V-belt is allowed to rotate the spindle by hand. It is absolutely forbidden to start the machine tool directly to force it to loosen or tighten, and at the same time block it on the bed surface with wooden boards to prevent accidents.

8. When the frame moves quickly, it must stop moving quickly 50~ 100 mm before the limit position to prevent collision.

9, turning tool installation shoulds not be too long, turning tool gasket to level off, the width should be consistent with the width at the bottom of the turning tool.

10, when turning the excircle, only the polished rod is allowed to move the slider instead of the lead screw.

1 1. When changing the rotation direction of the spindle, stop the spindle first, and don't suddenly change the rotation direction of the spindle.

12, it is not allowed to brake the spindle rotation by reversing in the work.

13, when processing steel parts to processing iron castings or other non-ferrous metal parts, the chips should be thoroughly removed and the coolant should be wiped.

When iron castings or other non-ferrous metal parts are processed into steel parts, the chips should be removed and the surface of the guide rail should be thoroughly wiped and lubricated.

14, high-speed cutting, must pay attention to:

(1) Cutting steel parts should have chip breakers.

② Top dust must be used.

15, the workpiece weight speed of large lathe must be carried out according to the requirements of the instruction manual.