DYZT-3 Mechanical assembly skills comprehensive experimental device

Release time：2024-05-11 11:30viewed：times

The comprehensive tr*ning platform for mechanical and electrical equipment assembly skills is designed based on the relevant professional teaching standards of mechanical and mechanical and electrical secondary vocational schools and closely combined with the needs of the industry and enterprises. The operating skills of this platform are aligned with national occupational standards and meet the actual job ability requirements of enterprises, such as " National Occupational Standards for Mechanical Equipment Installers", "Machine Rep*r Fitter ", and "National Occupational Standards for Combined Machine Tool Operators"; the platform can use typical tasks at industrial sites as practical projects to achieve project-based teaching and facilitate students to "learn by doing and learn by doing" "Do", which is operable and practical. By completing the preparation of mechanical equipment drawings and assembly processes, component assembly and adjustment, assembly and adjustment of combined machine tools, typical machine tools and machine tool components, assembly quality inspection and equipment debugging, operation and trial processing, students can improve their comprehensive professional skills. Ability, playing a demonstration and leading role in the construction of mechanical assembly tr*ning rooms for secondary vocational processing and manufacturing majors.
1. Product Features
The product is based on the skill requirements of relevant national occupational standards, industry standard occupations and positions, and combined with the characteristics of the mechanical assembly technology field, allowing students to tr*n in a more realistic environment to exercise students' professional abilities and improve their professional qualities. .
Taking actual work tasks as the carrier, the work implementation process is divided according to the characteristics of the mechanical equipment assembly process and processing process, and professional practice activities such as component assembly and adjustment, complete machine assembly and adjustment, trial processing, etc. are focused on cultivating students' mechanical assembly technology. required comprehensive capabilities.
2. Technical performance
1. Input power supply: three-phase four-wire (or three-phase five-wire) ~ 380V ± 10% 50Hz
2. Platform capacity: <0.5kVA
3. Working environment: Temperature -10℃ ~ +40℃ Relative humidity ≤ 85% (25℃) Altitude <4000m
4. Micro asynchronous motor : voltage 380V, power 60W
5. 2 AC reduction motors: 1 rated power 90W, reduction ratio 1:25 1 rated power 40W, reduction ratio 1:3
6. Overall dimensions: 1520mm × 710mm × 1175mm (tr*ning table), 900mm × 600mm × 750mm (operating table),
7. Safety protection: with current leakage protection, safety meets national standards
3. Device composition
This device can achieve Purely mechanical automatic processing function, a variable speed power box provides two channels of transmission power to the equipment, one channel of power controls the four-point indexing of the precision indexing head through the opening and closing of the electromagnetic clutch, and four eccentrics are installed on the workbench of the precision indexing head. Wheel clamping fixture, the workpiece is automatically fed during the indexing process of the indexing head. The workpiece is clamped by the eccentric clamping fixture. The processed workpiece passes through the cam handle lever to loosen the eccentric clamping fixture and release the workpiece. Fall into the material tray; one road is connected to the bevel gear shaft through a synchronous pulley drive, and the bevel gear distributor is divided into three drives. One drive is the bevel gear and the cylindrical cam to drive the automatic drilling machine to realize the feed and retract functions; the second drive is the cone drive. The gear shaft is equipped with an adjustable disc cam and a limit switch device, which can control the circuit signal of the electromagnetic clutch, so that the indexing head cooperates with the automatic drilling machine and automatic marking machine; the third routing double universal coupling, The rack and pinion connecting rod mechanism controls the conical roller clutch of the automatic marking machine. The automatic marking machine uses a three-phase asynchronous motor to drive the crankshaft to achieve the function of stamping.

This device m*nly consists of a tr*ning platform, a variable speed power box, a precision indexing head, a workpiece clamping device, an automatic drilling machine feeding mechanism, an automatic marking machine, a coupling, an electromagnetic clutch, a cam mechanism, and a rack and pinion linkage mechanism. , assembly and testing tools and other parts.
1) Variable speed power box module: There is a power source to provide power. After speed change is achieved, the power is output from two channels. The box structure is m*nly composed of three shafts, one input shaft and two output shafts. The two output shafts are at an included angle of 90°, which can complete the function of one shaft input and two shaft variable speed output. It can complete the assembly process and accuracy testing tr*ning of the transmission power box.
2) Indexing module: It is m*nly composed of worm gear, box, tapered bearing, unloading device, work surface, etc. It adopts the structure of industrial universal indexing head. Through the cooperation of coupling and electromagnetic clutch, the work can be realized. The stage is divided into four degrees. It can complete the assembly process and accuracy testing tr*ning of precision indexing heads.
3) Workpiece clamping device module: It consists of four eccentric clamping fixtures. The four clamping devices are distributed at 90° and installed on the work surface of the precision indexing head to achieve clamping and positioning of the workpiece. It can complete the assembly process and accuracy testing tr*ning of the workpiece clamping device.
4) Automatic drilling machine feeding mechanism module: It can drive the automatic drilling machine to realize feeding, retracting and other functions. It is m*nly composed of automatic drilling machine power motor, cylindrical cam mechanism, rectangular groove sliding plate, adjusting screw mechanism, bearing seat, linear guide p*r, bevel gear mechanism, etc. It can complete the assembly process and accuracy testing tr*ning of cylindrical cam mechanisms, dovet*l sliding mechanisms, linear guide p*rs, etc.
5) Automatic marking machine module: M*nly composed of crankshaft, bearing bush, hexagonal cam clutch, guide device, striking head, gripper, cup-shaped box, power reduction motor, bearings, etc., which can automatically mark workpieces. The heads can be replaced freely. Can complete the assembly process and accuracy testing tr*ning of automatic marking machines.
6) Coupling module: M*nly composed of elastic connection couplings, hard connection couplings, cross universal couplings, etc. Can complete coupling assembly process and accuracy testing tr*ning.
7) Electromagnetic clutch module: M*nly composed of electromagnetic clutch assembly, electromagnetic clutch connecting flange, transmission shaft, bearing seat, bearings, bevel gear transmission , etc. It can complete practical tr*ning on the electromagnetic clutch assembly process, precision adjustment, testing, and the action coordination of carbon brushes and electromagnetic clutches.
10) Cam control module: M*nly composed of disc cam, adjusting nut, limit switch, adjusting bracket, bevel gear, key, shaft, bearing, support, end cover, etc. It can complete practical tr*ning on the assembly process, accuracy adjustment, and detection of cam-controlled electromagnetic clutches, as well as the action coordination between disc cams and electromagnetic clutches.
9) Gear rack and pinion linkage mechanism module: It is composed of crank, connecting rod, gear, rack, bearing seat, bearing, shaft, etc., and controls the automatic marking machine cone roller clutch by adjusting the cooperation of the gear rack and pinion linkage mechanism. opening and closing. It can complete the assembly process and accuracy testing tr*ning of the rack and pinion linkage mechanism.
10) Assembly and testing tools: configure commonly used assembly tools and testing tools, and master the operation of measuring tools through the application of measuring tools
11) Mechanical tr*ning room simulation courseware
The basic module can realize functions: basic knowledge and introduction of mechanical assembly technology; the structure and working principle of the m*n components of mechanical assembly technology, virtual disassembly and assembly of gearboxes; three-dimensional animation video explanation and demonstration; virtual disassembly and assembly of clutch worm transmission mechanism, three-dimensional Animation video explanation and demonstration; virtual disassembly and assembly of gear reducer, three-dimensional animation video explanation and demonstration; virtual disassembly and assembly of intermittent rotary table, three-dimensional animation video explanation and demonstration; virtual disassembly and assembly of punch mechanism, three-dimensional animation video explanation and demonstration; power source Virtual disassembly and assembly, three-dimensional animation video explanation and demonstration; virtual disassembly and three-dimensional animation video explanation and demonstration of the feeding mechanism. 3D mechanical module: It has a 3D mechanical parts library and text descriptions of the functions and applications of mechanical parts. It can realistically complete the 3D animation demonstration of the movements of more than a dozen kinds of mechanical planar mechanisms, and can complete the assembly tr*ning of more than a dozen kinds of mechanical planar mechanisms, and A sequence list of the correct assembly of mechanical mechanism components is provided for students to use for practical operations on the computer, and the explosion diagram demonstration of the assembly and assembly and disassembly process of more than a dozen types of mechanical planar mechanisms is automatically completed.
12) Virtual simulation teaching system
Mechanical tr*ning safety education virtual simulation software: This software is developed based on unity3d. The software adopts the form of three-dimensional roaming. It can control movement through the keyboard and the mouse to control the direction of the lens. It is equipped with mechanical safety distance experiments and mechanical safety protection devices. Experiment and basic assessment of mechanical safety protection design. When the experiment is in progress, the three-dimensional roaming screen uses arrows and footprints to prompt the user to move to the experimental location. The circle around the mechanical object displays the working radius. The experimental process is accompanied by a dialog box reminder of the three-dimensional robot.
A. The content of the mechanical safety distance experiment includes the safety distance experiment to prevent upper and lower limbs from touching the danger zone (divided into two fence heights and opening sizes). After selecting to enter, GB23821-2009 "Mechanical Safety to Prevent Upper and Lower Limbs from Touching the Danger Zone" pops up in front of the camera. "Safe Distance" requirements, error demonstration: The experimental process is that after the human body enters the working radius of the mechanical object and is injured, the red screen and voice prompts that the human body has received mechanical damage, and returns to the original position and conducts the next experiment. The last step is the correct approach.
B. Mechanical safety protection device experiments are divided into safety interlock switches, safety light curt*ns, safety mats, safety laser scanners and other protection device experiments. Optional categories (safety input, safety control, safety output, others), manufacturers, products List (safety interlock switch, safety light curt*n, safety mat, safety laser scanner, safety controller, safety relay, safety guardr*l). There is a blue flashing frame reminder at the installation location. Experimental process: select the safety guardr*l and install it, select the safety interlock switch (or select the safety light curt*n, safety mat, safety laser scanner) and install it, select the safety controller and install it in the electrical control box , select the safety relay and install it in the electrical control box, click the start button on the electrical control box. If you enter a dangerous area, the system will sound an alarm and the mechanical object will stop working. Select the reset button on the electrical control box to stop.
C. The basic assessment of mechanical safety protection design requires the completion of the installation of the mechanical safety system, and the correct installation of safety guardr*ls, safety interlock switches, safety light curt*ns, safety mats, safety laser scanners, safety controllers, safety relays, 24V power supplies, signal lights and Emergency stop button, the assessment is divided into ten assessment points. Some assessment points have 3 options, which are freely chosen by the students. After selecting the final 10 assessment points, submit for confirmation, and the system will automatically obt*n the total score and the score of each assessment point. .
D. The software must be on the same platform as a whole and cannot be displayed as separate resources.
E. At the same time, we provide customers with the VR installation package of this software to facilitate users to expand into VR experiments. VR equipment and software installation and debugging are not required.
Mechanical assembly and fitter assembly virtual simulation software: This software is developed based on unity3d, with optional 6-level image quality. It is equipped with design and virtual disassembly and assembly of reducers and shafting structures, design and simulation of common mechanical mechanisms, mechanism resource library, typical machinery Mechanism (virtual disassembly and assembly of gasoline engine), the software is a whole software and cannot be individual resources.
A. Reducer design and virtual disassembly interface can choose worm gear bevel gear reducer, two-stage expanded cylindrical gear reducer, bevel cylindrical gear reducer, coaxial cylindrical gear reducer, bevel gear reducer, and one-stage cylindrical gear reducer. Gear reducer.
Worm bevel gear reducer: After entering the software, the assembly content is automatically played. Each step in the video has a text description
. Secondary expandable cylindrical gear reducer: After entering the software, the content is played in the form of a video. The video content should include: Part name ( Scan the QR code to see the names of parts), disassembly and assembly demonstration (including disassembly and assembly), virtual disassembly (including overall, low-speed shaft, medium-speed shaft, high-speed shaft, box cover, box seat)
conical cylindrical gear reducer, Coaxial cylindrical gear reducer, bevel gear reducer, first-level cylindrical gear reducer: click to enter and automatically jump to the edrawings interface. The models are all three-dimensional models. By clicking on the parts, the names of the parts are displayed, and the 360° view is av*lable Rotate, zoom in, zoom out, pan, and move parts to disassemble and assemble the entire reducer. At the same time, you can select the home button to return to the original state of the reducer. The bevel gear reducer and the first-stage cylindrical gear reducer have added the function of inserting a cross section, and the cross section can be freely dragged to observe the internal structure of the reducer.
B. Shaft structure design and virtual disassembly and assembly interface optional parts recognition, disassembly and assembly demonstration, and actual operation.
1. Parts recognition: three-dimensional model and part name including helical gear, non-hole end cover, coupling, coupling key, shaft, gear key, hole end cover, shaft sleeve, deep groove ball bearing, any All parts can be rotated 360°
2. Disassembly and assembly demonstration: There are 2 built-in cases. When you move the mouse to the position of a cert*n part (except the base and bearing seat), the part will automatically enlarge and the name of the part will be displayed. It is equipped with disassembly and Assembly button, the function is to automatically complete the disassembly and assembly of the shaft system structure by the software. All three-dimensional scenes can be rotated, enlarged, reduced and translated 360° in all directions.
3. Practical operation: The three-dimensional parts are neatly placed on the table. The students manually select the corresponding parts and move them to the shaft system structure. The parts can be installed only when they are placed in the correct order and in the correct position. There is a restart button to facilitate students to restart. Conduct virtual experiments. When you move the mouse to a cert*n part position (except the base and bearing seat), the part will automatically enlarge and the part name will be displayed.
C. Common mechanical mechanism design and simulation, optional hinge four-bar mechanism design and analysis, I\II type crank rocker mechanism design and analysis, offset crank slider mechanism design and analysis, crank swing guide rod mechanism design and analysis, hinge Four-bar mechanism with integrated trajectory, eccentric linear-acting roller push rod cam, and centering linear-acting flat-bottomed push rod cam.
1. Each mechanism should be able to input corresponding parameters, and the software can automatically calculate the parameters, and can perform motion simulation and automatically draw curves.
D. The mechanism resource library includes 11 types of planar link mechanisms, 5 types of cam mechanisms, 6 types of gear mechanisms, 8 types of transmission mechanisms, 11 types of tightening mechanisms, 6 types of gear tr*n mechanisms, and 8 types of other mechanisms (mechanical equipment simulation)
E , Virtual disassembly and assembly of gasoline engines, optional crankcase assembly and disassembly demonstration, crankcase virtual assembly, valve tr*n assembly and disassembly demonstration, valve tr*n virtual assembly
1. Both the crankcase assembly and disassembly demonstration and the gas distribution system assembly and disassembly demonstration are equipped with disassembly buttons, assembly buttons, restart, and disassembly observation buttons. When the mouse is moved to a cert*n part position, the part will automatically enlarge and the part name will be displayed. , the function is to automatically complete the disassembly and assembly of the shaft system structure by the software. When using the decomposition observation button, the 3D model of the crankcase or gas distribution system automatically displays an exploded view, which can be rotated, enlarged, reduced, and translated 360°.
2. The 3D parts of the crankcase virtual assembly and the gas distribution system virtual assembly are neatly arranged When placed on the desktop, students manually select the corresponding parts and move them to the mechanism. The parts can be installed only when they are placed in the correct order and in the correct position. There is a restart button to facilitate students to re-perform the virtual experiment. When you move the mouse to cert*n part locations, the part names are automatically displayed.
8. Microcontroller and PLC programmable design and control virtual simulation software.
This software is developed based on unity3d. It has built-in task books and experimental prompts. It adopts the form of three-dimensional roaming. The movement can be controlled through the keyboard, the mouse controls the direction of the lens, and the mouse wheel controls the distance of the screen. Rotated 360 degrees, the three-dimensional wall has electrical diagrams p*nted on it.
1. Equipment component assembly: Follow the highlighted prompts to find the component control rack. You can drag components from the component library according to the electrical component layout diagram and place them on the component control rack. The component library is equipped with control panels, switching power supplies, micro relays, and plcs. , frequency converter, stepper motor, AC motor, servo motor, servo driver, stepper driver, interface board, operation panel, circuit breaker, servo motor interface, digital display voltmeter, there will be a prompt when the selection is wrong.
2. Technical indicator measurement: Select the multimeter to check the servo motor connection cable and the servo driver with BOP panel. Adjust the left and right buttons to the ohm level, drag the black and red test leads and insert them into the R, S, T, U, V, W and ground phases respectively for testing. For resistance value, according to the highlighted prompt, find the power switch in the scene, drag the pen or multimeter to measure whether the power is on.
3) Electrical component connection: According to the electrical wiring diagram, connect the power line and control line, highlight the interface, connect the driver, interface board, power line, servo motor, encoder, PLC, and relay in order, and turn on the m*n power supply After turning on the switch, servo power switch, and faulty circuit switch, a fault code will be prompted, and you can select the cause of the fault from three items.
4) Parameter adjustment test: Turn on the power to adjust the speed, set the driver parameters according to the requirements of the mission statement, perform inching control/analog speed adjustment/multi-stage speed control, and observe the three-dimensional servo motor motion control. Select any of the 6 PLC programs and then adjust the servo drive analog speed. The PLC parameters are adjustable. Set the drive parameters and enter the three-dimensional servo motor motion control interface and electrical display interface. The operation panel is equipped with servo start, low speed, medium Speed, high speed, servo stop, torque limit, abnormal reset, forward/reverse rotation selection, 0-10 sliding control (the electrical panel displays the value in real time).
5) Inspect the three-dimensional virtual simulation machine of the servo system mask machine, observe its structure, inject fault points, select multiple fault causes, and locate faults. Connect the fault causes with the corresponding detection and positioning methods, and troubleshoot after selecting the correct ones. Connect the cause of the f*lure with the corresponding solution.
6) Control process plan, optional single machine mode and online mode of inching control/analog speed regulation/multi-stage speed regulation control, call up the control panel, display the operation of 3 production lines, perform real-time control, optional inching, low and medium High speed, start and stop control, adjustable speed. According to the control plan, the system automatically determines the performance of the production line and submits a disclosure record.
4. Complete the following teaching content:
Project 1 Assembly and adjustment of coupling module
According to the assembly drawing and assembly process requirements, assemble and adjust elastic connection couplings, hard connection couplings, cross universal couplings, etc.
Project 2: Assembly and adjustment of gear, rack and pinion mechanism module
. According to the assembly drawing and assembly process requirements, assemble and adjust gears, racks, connecting rods and other mechanisms.
Assembly and adjustment of project three cam-controlled electromagnetic clutch
According to the assembly drawing and assembly process requirements, complete the assembly and adjustment of the cam, cam control system, electromagnetic clutch, etc.
Project 4: Assembly and adjustment of the precision indexing head module
. Complete the assembly and adjustment of the worm gear, box, workbench, etc. according to the assembly drawing and assembly process requirements.
Project 5: Assembly and adjustment of the workpiece clamping device module.
According to the assembly drawing and assembly process requirements, assemble and adjust the eccentric clamping device.
Project 6: Assembly and adjustment of the variable speed power box module
. According to the assembly drawing and assembly process requirements, assemble and adjust the variable speed power box.
Project 7: Assembly and adjustment of the automatic drilling machine feed mechanism module
. According to the assembly drawing and assembly process requirements, assemble and adjust the linear guide p*r, cylindrical cam, dovet*l mechanism, screw rod, etc.
Project 8 Assembly and adjustment of automatic marking machine module
According to the assembly drawing and assembly process requirements, assemble and adjust the crankshaft, bushings, bearings, guide devices, striking heads, etc.
Item 9: Complete machine assembly and precision adjustment of mechanical components.
According to the functional requirements of the mechanical equipment, each component will be assembled according to the assembly requirements and assembly accuracy, and the complete machine assembly will be completed and accuracy testing will be achieved.
Item 10: Debugging, operation and trial processing of mechanical equipment:
debug and operate mechanical equipment to meet the specified work requirements and technical requirements, and conduct trial processing of mechanical equipment.
5. Basic configuration
1. Basic configuration of the device

serial number	name	Models and Specifications	quantity
1	Tr*ning platform	Overall dimensions of the tr*ning table: 1100mm × 700mm × 1150mm; all-steel structure, with a storage cabinet under the table and 2 drawers above and on the right side of the cabinet; 4 universal wheels are installed at the bottom for easy movement and layout. Cast iron flat plate: 1100mm×700mm×40mm;	1 set
2	Electrical console	Overall dimensions of the console: 450mm × 700mm × 1040mm; all steel structure, with a storage cabinet under the table and a drawer above the cabinet; 4 universal wheels are installed at the bottom for easy movement and layout. The control panel includes total power control and protection, power indicator lights, operating instructions, speed regulator, instrumentation, etc. It can control the power source part of the entire tr*ning platform.	1 set
3	Bevel gear reducer	The m*n configuration consists of: special box, synchronous wheel, transmission shaft, cylindrical gear, bevel gear, bearing, key, end cover, support, etc.	1 set
4	Coupling	The m*n configuration consists of: elastic connection coupling, hard connection coupling, universal joint, key, shaft, bearing, support, end cover, etc.	1 set
5	dog clutch	The m*n configuration consists of: bevel gear, elastic coupling, clutch assembly, transmission shaft, key, shaft, bearing, support, end cover, etc.	1 set
6	Worm gear mechanism	The m*n configuration consists of: bearing seat, tapered bearing, angular contact bearing, locking nut, worm gear, worm, bearing, worm shaft, unloading device, spacer sleeve, key, end cover, etc.	1 set
7	Eccentric clamping device	The mn configuration consists of: mounting plate, eccentric wheel, dovetl base, pressure plate, spring, handle, V-shaped slider, circular guide r*l, etc.	1 set
8	Cam feed mechanism	The mn configuration consists of: drill chuck, motor, coupling, cylindrical cam mechanism, bearing seat, linear guide pr, bevel gear mechanism, L-shaped sliding plate, adjustment mechanism, bracket, shaft, end cover, key, etc.	1 set
9	Stamping mechanism	The mn configuration consists of: locking device, brake block, handle body, handle rod, slider, crankshaft, split bearings, connecting rod, hexagonal cam, clutch, wear-resistant balls, ball head connecting rod kit, linear guide rl, die, Clamping devices, special-shaped boxes, bearings, supports, end covers, three-phase motors, gears, etc.	1 set
10	Cam controller	The mn configuration consists of: bevel gears, shafts, angular contact bearings, locking nuts, disc cams, keys, retning rings, etc.	1 set
11	Eccentric pendulum mechanism	The m*n configuration consists of: eccentric mechanism, moving cam, rack and pinion, sliding plate, crank and swing rod, connecting rod, crank, transmission shaft, bearing seat, bearings, connecting rod adjustment mechanism, etc.	1 set
12	Accessories	Instructions for use, spare screws, adjustment handle, anti-rust oil, parts box and cleaning oil tank, etc.	1 set
13	Mechanical tr*ning safety education virtual simulation software:	The software is based on C# and JS language programming design. Users can choose different interactive interface sizes according to computer configuration. Six image quality levels including smooth image quality, medium image quality, and perfect image quality can be selected. More than ten types of shafting mechanisms, including gear shafting and worm shafting, can be selected for installation, disassembly, assembly, parts measurement, and assessment. There are smart reminders during the steps of parts disassembly and assembly. The models in the software are all 3D models, produced by 3Dmax, and have been rendered and polished to make the models look the same as real parts. There is a non-standard parts library, Standard parts library and measurement tool library for disassembly and assembly selection. The software is equipped with integrated electronic experiment assessment questions and instructions for the purpose, steps, and requirements of the experiment. When using the assessment function, the software randomly generates questions for students to answer, and gives assessment scores when students finish answering the questions. This software can rotate, zoom in and out in all directions to view its det*ls. Reducer module: The system's built-in tool library (such as hammer, wrench, puller, screwdriver, etc.) is used to select tools to disassemble the reducer, and the parts are automatically placed neatly after disassembly.	1 set

2. Configuration of tools and measuring tools

serial number	name	Models and Specifications	quantity
1	bench vise	150	1 set
2	scribed tablet	300×300	1 piece
3	Copper rod	One end is Φ18, one end is Φ14×250mm, and one end is φ30.	2 sticks
4	External circlip pliers	Str*ght mouth 7 inches, curved mouth 7 inches	1 each
5	winch	M3～M12(1/16〞～1/2〞)	1 handful
6	wrench	Dead wrench 14-17, open torx combination wrench 7, 17, hexagonal wrench, adjustable wrench 150mm, 250mm, round nut wrench M14, M16, M27	1 each
7	Rama	150	1
8	Hammer	Iron hammer (1.5 pounds), rubber hammer	1 each
9	Bearing disassembly and assembly sleeve	6 piece set	1 set
10	Caliper	Vernier caliper: 0～300mm, depth vernier caliper: 0～200mm	1 handful
11	Dial indicator	Lever type dial indicator: measuring range: 0~0.8mm, graduation value: 0.01mm; dial indicator: measuring range: 0~10mm	1 set
12	Magnetic watch base	1 large and 1 small each	2
13	Slotted screwdriver	10〞	1 handful
14	micrometer	Measuring range: 0～25mm	1 handful
15	Square		1 handful
16	Steel ruler	500mm	1 handful

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