Graduation project: Transform the control system of Z3040 radial drilling machine by using PLC

Z3050 radial drilling machine pre-selected valve body machining worker 177 catalog 1Preamble.

2.Machinery manufacturing process design brief.

3.References.

4.Part analysis.

5.Determine the stock.

6.Draw up a routing.

7.Milling plane process calculation.

8.Calculation of boring holes.

9.Calculation of boreholes.

10.Calculation of grinding machining.

11.Special fixture design for boring.

12.The preface to the conclusion of the graduation project.

The graduation project of mechanical manufacturing technology is an important part of the teaching process on the basis of completing all the courses of the university and carrying out the graduation practice. The design requires us to be able to comprehensively use the basic theories learned and combine the practical knowledge learned in the actual production, independently analyze and solve process problems, and initially have the ability to design a medium complexity part (pre-selected valve body) of the process specification and the use of the basic principles and methods of fixture design to formulate the fixture design scheme, complete the ability of the fixture structure design, and also be familiar with and use the relevant manuals, charts and other technical information and a practical opportunity to write technical documents. Lay a good foundation for future work. Process design briefs for mechanical manufacturing.

1.Design Title:

Design the mechanical processing process specification and boring fixture design of the pre-selected valve body.

2.Source:

1) Production program: 100,000 pieces per year.

2) Production type: medium batch production.

3) Workshop work system: two shifts.

3.Design content.

1) 1 piece of part blank drawing.

2) 1 set of machining process card.

3) 1 set of machining process card.

4) 1 pair of special clamps.

5) Design specification: 1 reference.

Literature (1): "Concise Manual of Machinery Manufacturing Process Design".

Harbin Institute of Technology, Li Yimin, ed. Literature (2): "Concise Manual of Cutting Dosage" (3rd Edition) edited by Ai Xing and Xiao Shigang (3): "Machining Technology Manual".

Beijing Publishing House published literature (4): "Metal Cutting Machine Tool Fixture Design Manual" (2nd Edition) Mechanical Engineering Press, edited by Pu Linxiang.

For more information, please refer to:

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To explain how the Z3040 radial drilling machine works, it is necessary to understand the structure of the equipment. The radial drilling machine is generally composed of motors, rotary handwheels, columns, operating tables and other components.

The column is divided into an inner column and an outer column, the outer column sleeve is fixed on the chassis, the inner column is fixed in the chassis, the outer column is sleeved on the inner column, and the operating table is fixed on the inner column, and the circumferential rotation ° is carried out.

One end of the rocker arm is sleeved on the inner column, and with the help of the force of the inner column, the rocker arm can move vertically along the inner column. Loosen the fixing, the rocker arm can move in a circular circle around the inner column, and the drill chuck and the rocker arm are a whole. The drill chuck is fixed on the inner column, the spindle is installed at the other end of the rocker arm, the spindle is installed in conjunction with other components, the handle drives the spindle to move, the spindle is docked with the pulley, and the motor power drives the belt to run.

The belt drives the spindle to move in a circular motion in order to be able to process different kinds of parts. The rocker arm can move up and down along the inner column under the action of the handle. The operator's table can be rotated on the outer column, so that the Z3040 radial drill can process a wide range of workpieces in the widest range, increasing efficiency.

The vertical movement and rotary motion of the spindle rocker arm in the radial drilling machine are manually adjusted. When the workpiece is processed, the spindle rotation is the main motion, and the vertical motion is the feed motion, that is, the longitudinal feed is made by the handle and spline rotation.

In the control circuit of Z3040 radial drilling machine, why are there these kinds of protection links?

The travel switches of the radial drill are all limit switches, which are used to protect the rise, fall, clamp and release in place. The limit Wang Qing switch uses the normally closed contact to disconnect the drive motor contactor in this direction to prevent the equipment from continuing to act after it is in place and damaging the electrical and mechanical structure. The current relay is to prevent the motor from burning out due to excessive current, and to protect the motor.

How to maintain the hydraulic radial drilling machine? 1. Clean the surface and dead corners of the machine tool, disassemble and wash each cover, and the surface and inside are required to be clean, no rust, no yellow robe, and the paint can see the light of the endowed iron. Clean the rail surface and remove the work surface burr.

Check and complete the protection of the spindle feed box of screws, handballs, hand plates 2 and radial drilling machines: check the oil quality, insist on excellence, and the oil quantity meets the demand. Remove burrs from the spindle taper.

Clean the hydraulic transmission system, oil filter, and adjust the oil pressure. 3. View of machine tool rocker arm and lifting clamping organization 4. Check the lubrication system of the equipment: clean linoleum, complete oil cups, dredge oil circuits, and bright oil windows.

5. Check the cooling system of the radial drilling machine: clean the cooling pump, filter and coolant tank. Look at the coolant lines and see if there is a leak.

6. Check the electrical system of the hydraulic radial drilling machine: clean the dust on the surface of the motor and the poor electrical box. Turn off the power, open the door cover of the electrical appliance, and check whether the electrical connectors and electrical components are loose or aging.

Check whether the limit switch is operating normally. Opening the door and cutting off the power is not to play an effect. Check whether the hydraulic system is normal and whether there is any appearance of oil leakage.

The control switch of each electrical appliance is not normal.

Travel switch, limit holding.

Protection, is the use of the lever principle, when the limited stroke touches the lever arm of the travel switch, the action of the lever disconnects the power supply, plays a role in stroke protection (at this time, the power supply of the reverse stroke will not be disconnected). Leaving the travel switch, the lever arm returns to its original position and is powered on.

The function of the current relay is to protect the motor (main motor) that drives the drill bit from continuing to work under overload. When the drill bit is stuck or the continuous feed speed is too fast, the motor may be subjected to excessive current due to overload, to prevent heating and burning the insulation, there must be a current relay and set a permissible current value, when this current value is exceeded, the relay acts, cuts off the working power supply, and protects the main motor.

ZQ3040C 13 radial drilling machine is mainly composed of base, inner column, outer column, rocker arm, headstock and workbench. The inner column is fixed at one end of the base, and an outer column is sleeved on the outside of it, and the outer column can rotate 360 degrees around the inner column. One end of the rocker arm is a sleeve, which is set to move up and down on the outer column.

ZQ3040C 13 radial drilling machine when machining, by a special tightening device to fasten the spindle box on the rocker guide rail, while the outer column is fastened on the inner column, the rocker arm is fastened on the outer column, and then drilling. During the drilling process, the drill bit carries out longitudinal feed while rotating cutting, and its motion form is:

1) The main motion of the radial drilling machine is the rotary motion of the spindle.

2) The feed movement is the longitudinal feed of the main axis.

3) The auxiliary motion has: the rocker arm moves vertically along the outer column, the spindle box moves along the length of the rocker arm, and the rocker arm and the outer column move around the inner column together.

On the basis of the working principle of the relay contact control system of Z3040 radial drilling machine, the design of the radial drilling machine control system with programmable controller (PLC) is proposed. The principle and characteristics of PLC are introduced. The hardware composition and software design of the radial drilling machine PLC control system are given. These include PLC selection, input-output (IO) address allocation, PLC external wiring diagram, PLC ladder program design; The working process of radial drilling machine controlled by PLC was analyzed. The main electrical components were selected.

The transformed Z3040 radial drilling machine simplifies the control circuit, makes the machine tool functional, easy to use, simple to maintain, reduces the failure rate of equipment operation, improves the utilization rate of equipment operation, and can realize high efficiency, energy saving and low cost in the production process. It has a wide range of application prospects in industry.