CN108735072B - Engineering combined teaching method - Google Patents
Engineering combined teaching method Download PDFInfo
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- CN108735072B CN108735072B CN201810533473.6A CN201810533473A CN108735072B CN 108735072 B CN108735072 B CN 108735072B CN 201810533473 A CN201810533473 A CN 201810533473A CN 108735072 B CN108735072 B CN 108735072B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
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Abstract
The invention belongs to the technical field of simulation teaching and discloses an engineering combination device which comprises an extruder model and an injection molding machine model, the extruder model comprises a motor, an extruder body and a cooling water tank from left to right in sequence, a screw is arranged in the extruder body in a matching way, one end of the screw is connected with a first connecting rod, one end of the first connecting rod penetrating through the extruder body is provided with a first gear, the other end of the screw is connected with a cylinder strip piece which sequentially passes through the right end of the extruder body and the cooling water tank, the cylinder strip spare with the axial centerline of extruder body is parallel, still discloses a teaching method based on above engineering combination device, plays the effect of successively simulating extruder forming process and injection molding machine die sinking process, can also deepen the understanding and the memory of rotatory moving to change rectilinear motion.
Description
Technical Field
The invention belongs to the technical field of simulation teaching, and particularly relates to an engineering combination device and a teaching method thereof.
Background
Data shows that the current situation of mechanical design transmission teaching of high, medium and occupational schools in China is as follows: the theory teaching is mainly used, the relation with practical application is less, the enthusiasm of students in learning is difficult to be stimulated, and the memory is not deep enough.
The invention organically combines classroom teaching contents with practical devices, can improve the understanding of students on the principle of the device, improve the study enthusiasm and study effect of courses, deepen the understanding of a mechanical transmission mechanism, and deepen the understanding and memory of the rotary motion to linear motion, so that the students can be clear at a glance and have deep memory.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention is directed to an engineering-combined teaching method.
The technical scheme adopted by the invention is as follows:
an engineering combination device comprises an extruder model and an injection molding machine model, wherein the extruder model sequentially comprises a motor, an extruder body and a cooling water tank from left to right, a screw rod is arranged in the extruder body in a matching manner, one end of the screw rod is connected with a first connecting rod, the first connecting rod penetrates through one end of the extruder body to be provided with a first gear, the other end of the screw rod is connected with a cylindrical bar-shaped part, the cylindrical bar-shaped part sequentially penetrates through the right end of the extruder body and the cooling water tank, and the cylindrical bar-shaped part is parallel to the axial center line of the extruder body;
the injection molding machine model sequentially comprises a screw rod, a sleeve, a movable die and a fixed die from left to right, wherein one end of the sleeve is sleeved on the screw rod in a matching manner, the other end of the sleeve is fixedly connected with the movable die, the sleeve is parallel to the die sinking direction of the movable die, and a second gear is arranged on the sleeve;
a second connecting rod is vertically arranged on a transmission shaft of the motor, arc-shaped teeth are arranged at the end part of the second connecting rod, the first gear and the second gear are symmetrically distributed by taking the transmission shaft of the motor as an object, and one end of each arc-shaped tooth is externally meshed and connected with the first gear;
the central angle of the arc-shaped teeth is not lower than 90 degrees and not higher than 180 degrees, and the radius of the arc-shaped teeth is more than four times of the radius of the first gear;
the movable mould is characterized in that a module is arranged between the movable mould and the fixed mould in a matched mode, a movable ejector rod is arranged in the fixed mould and is parallel to the mould opening direction of the movable mould, one end of the movable ejector rod is perpendicularly connected with the module, and the other end of the movable ejector rod is connected with a compression spring.
Further, the arc-shaped teeth are semi-arc-shaped teeth, and the radius of the arc-shaped teeth is equal to 8 times of the radius of the first gear.
Further, the arc-shaped teeth are quarter arc-shaped teeth, and the radius of the arc-shaped teeth is equal to 16 times of the radius of the first gear.
Further, the left end of the extruder body is provided with a feed hopper.
Furthermore, a sliding rail is arranged below the movable die, the movable die is arranged on the sliding rail in a sliding mode, and the sliding rail is arranged along the die opening direction of the movable die.
Further, the thread pitch of the lead screw is greater than the thickness of the module.
The invention also discloses a teaching method based on the engineering combination device, which comprises the following steps:
starting a forward rotation button of a motor, and sequentially and synchronously playing dynamic interpretation of an extruder model and dynamic interpretation of an injection molding machine model;
starting a reverse button of a motor, and stopping broadcasting the dynamic interpretation of the extruder model and the dynamic interpretation of the injection molding machine model;
and step three, selecting the arc-shaped teeth as semi-arc-shaped teeth, wherein the radius of the arc-shaped teeth is equal to 8 times of the radius of the first gear. The arc-shaped teeth are arranged at the end part of the second connecting rod, one end of each arc-shaped tooth is in external meshed connection with the first gear, and the first step and the second step are repeated;
or step three, the arc-shaped teeth are quarter arc-shaped teeth, the radius of the arc-shaped teeth is equal to 16 times of the radius of the first gear, the arc-shaped teeth are arranged at the end part of the second connecting rod, one end of the arc-shaped teeth is in external meshing connection with the first gear, and the step one and the step two are repeated;
and step four, closing a power switch of the motor.
The invention has the beneficial effects that:
the engineering-based combining device can firstly realize the process of simulating extrusion by an extruder model after a forward rotation button of a motor is started, and then realize the process of ejecting a module out of an ejector rod after the molding of the injection molding machine model, thereby playing the effect of simulating the molding process of the extruder and the mold opening process of the injection molding machine in sequence, and further deepening the understanding and memory of the rotary motion to linear motion.
Drawings
FIG. 1 is a top view of an ergonomic binding of the present invention.
Fig. 2 is a schematic structural view of an arc-shaped tooth according to embodiment 1 of the present invention.
In the figure: 1-extruder body; 11-a screw; 12-a first connecting rod; 13-a cylindrical bar; 2, a motor; 21-a transmission shaft; 22-a second connecting rod; 23-arc teeth; 3-cooling the water tank; 41-a first gear; 42-a second gear; 5-a screw rod; 6-a sleeve; 7-moving the mold; 8-fixing the mold; 81-movable ejector rods; 82-a compression spring; 9-module.
Detailed Description
The invention is further explained below with reference to the drawings and the specific embodiments.
Example 1:
the embodiment provides an engineering combining device which comprises an extruder model and an injection molding machine model, wherein the extruder model sequentially comprises a motor 2, an extruder body 1 and a cooling water tank 3 from left to right, a screw rod 11 is arranged in the extruder body in a matching manner, one end of the screw rod 11 is connected with a first connecting rod 12, the first connecting rod 12 penetrates through one end of the extruder body 1 and is provided with a first gear 41, and the screw rod 11 can be driven to rotate through the rotation of the first gear. The other end of the screw is connected with a cylinder strip-shaped piece 13, the cylinder strip-shaped piece 13 sequentially penetrates through the right end of the extruder body 1 and the cooling water tank 3, and the cylinder strip-shaped piece 13 is parallel to the axial center line of the extruder body; along with the screw rod rotates, the screw rod still can be at this internal reciprocating displacement of extruder, when the screw rod clockwise rotation, can drive the screw rod displacement right to drive cylinder strip 13 and drive the slow displacement of cylinder strip and stretch out outside the cooling trough, like this along with voice broadcast's synchronous explanation can let the student understand the shaping principle of extruder better. The distance between the cylindrical strip 13 and the outlet of the cooling water tank can be determined according to the displacement distance of the screw.
The injection molding machine model sequentially comprises a screw rod 5, a sleeve 6, a movable mold 7 and a fixed mold 8 from left to right, one end of the sleeve 6 is sleeved on the screw rod 5 in a matching manner, the other end of the sleeve 6 is fixedly connected with the movable mold 7, the sleeve 6 is parallel to the mold opening direction of the movable mold 7, and a second gear 42 is arranged on the sleeve 6; the sleeve is rotated by the rotation of the second gear 42 to rotate and displace the sleeve back and forth, such that the sleeve displaces the movable mold toward the mold opening direction of the movable mold when the second gear rotates clockwise, and vice versa, such that the movable mold displaces toward the mold closing direction of the movable mold when the second gear rotates counterclockwise.
Set up second connecting rod 22 perpendicularly on the transmission shaft 21 of motor 2, the tip of second connecting rod 22 sets up arc tooth 23, and 2 operations of motor can drive arc tooth 23 and rotate, if during the motor forward operation, drive arc tooth counter-clockwise turning, the one end of arc tooth with first gear external toothing is connected, during the installation, can make the one end of arc tooth 23 just in time be connected with first gear 41 external toothing, because first gear reaches the second gear with the transmission shaft of motor is the symmetric distribution as the object, drives first gear clockwise rotation again and drives second gear clockwise rotation in-process like this, will appear earlier that cylinder bar spare slowly stretches out outside the cooling trough, appears the dynamic process that the sleeve drove the movable mould towards the die sinking direction displacement of movable mould again. The effect of simulating the molding process of the extruder and the mold opening process of the injection molding machine in sequence is achieved.
Because the matching is equipped with module 9 between movable mould 7 and the cover half 8, be equipped with movable ejector pin 81 in the cover half, movable ejector pin 81 with the die sinking direction of movable mould is parallel, the one end of movable ejector pin is connected perpendicularly the module, and compression spring 82 is connected to the other end. When the movable mould was towards the die sinking direction displacement, the extrusion force that gives the module when the compound die of movable mould and cover half slowly removed, compression spring 82 can slowly promote the ejecting module of activity ejector pin 81 in the effect of spring restoring force, demonstrates the process that the module is pushed out, and teaching effect is better. The central angle of the arc-shaped teeth is not lower than 90 degrees and not higher than 180 degrees, and the radius of the arc-shaped teeth is larger than four times of the radius of the first gear, so that the first gear or the second gear can be driven to rotate for more than one circle by the rotation of the arc-shaped teeth, the distance of the thread pitch of the screw rod is shifted to the die opening direction or the die closing direction in the process of one circle rotation of the screw rod, the thread pitch of the screw rod is larger than the thickness of the module, and the effect of complete ejection of the module can be simulated.
In this embodiment, the arc-shaped teeth are semi-arc-shaped teeth, and the radius of the arc-shaped teeth is equal to 8 times the radius of the first gear. The arc tooth rotates the in-process, can drive first gear revolve 4 rings to can drive the screw thread interval of cylinder bar displacement quadruple screw rod, the teaching bandwagon effect is better, can design the displacement distance of cylinder bar according to actual need.
The left end of the extruder body is provided with the feed hopper, so that the appearance of the extruder model is more vivid.
The movable mould is characterized in that a sliding rail is arranged below the movable mould, the movable mould is arranged on the sliding rail in a sliding mode, and the sliding rail is arranged along the mould opening direction of the movable mould, so that the movable mould can be directionally displaced along the sliding rail in the displacement process.
The embodiment also provides a teaching method based on the engineering combination device, which comprises the following steps:
starting a forward rotation button of a motor to drive the motor to rotate forward, driving an extruder model to simulate an extrusion process, driving a process that a module is ejected out by an ejector rod after the extruder model is molded, and synchronously playing dynamic interpretation of the extruder model and dynamic interpretation of the injector model in sequence; the working principle of the extruder and the working principle of the injection molding machine can be better understood by students.
Starting a reverse button of a motor, and stopping broadcasting the dynamic interpretation of the extruder model and the dynamic interpretation of the injection molding machine model; the cylinder strip piece and the module of the engineering combination device are returned to the initial positions, so that the process of simulating extrusion of the extruder model and the process of ejecting the module by the ejector rod after the injection molding machine model is molded and formed can be conveniently demonstrated next time.
And step three, selecting the arc-shaped teeth as semi-arc-shaped teeth, wherein the radius of the arc-shaped teeth is equal to 8 times of the radius of the first gear. The arc-shaped teeth are arranged at the end part of the second connecting rod, one end of each arc-shaped tooth is in external meshed connection with the first gear, and the first step and the second step are repeated; the transmission of the arc-shaped teeth is understood through an example, and the semi-arc-shaped teeth can drive the second gear to rotate around, so that the movable die is driven to displace the thread space of the screw rod which is four times as large as the movable die.
And step four, closing a power switch of the motor.
Example 2:
the arc-shaped teeth in embodiment 1 are replaced by quarter arc-shaped teeth, and the radius of the corresponding arc-shaped teeth is equal to 16 times of the radius of the first gear.
The arc tooth rotates the in-process, can drive first gear rotation 4 rings equally to can drive the screw thread interval of cylinder strip spare displacement quadruple screw rod, deepen the understanding and the memory of rotatory motion change rectilinear motion, the teaching bandwagon effect is better, can design the displacement distance of cylinder strip spare according to actual need.
Other components and their connection relations are the same as embodiment 1, and step three of the teaching method based on the engineering combination device is replaced by: replacing the arc-shaped teeth with quarter arc-shaped teeth, wherein the radius of the arc-shaped teeth is equal to 16 times of the radius of the first gear, installing the arc-shaped teeth at the end part of the second connecting rod, enabling one end of the arc-shaped teeth to be externally meshed and connected with the first gear, and repeating the first step and the second step; the transmission of the arc-shaped teeth is understood through an example, the quarter arc-shaped teeth can drive the second gear to rotate around, so that the movable die is driven to displace the thread pitch of the screw rod by four times.
In a word, the engineering-based combining device can firstly simulate the extrusion process of an extruder model after a forward rotation button of a motor is started, and then has the process that a module is ejected out by an ejector rod after the injection molding machine model is molded, so that the effect of successively simulating the extrusion process and the mold opening process of the injection molding machine is achieved, the understanding and the memory of the rotary motion to linear motion can be further enhanced, the teaching method is convenient to use, and students can learn by themselves by matching with synchronous voice explanation.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (7)
1. An ergonomic binding device, comprising: the extruder comprises an extruder model and an injection molding machine model, wherein the extruder model sequentially comprises a motor, an extruder body and a cooling water tank from left to right, a screw rod is arranged in the extruder body in a matching manner, one end of the screw rod is connected with a first connecting rod, a first gear is arranged at one end of the screw rod, which penetrates through the extruder body, the other end of the screw rod is connected with a cylinder strip-shaped part, the cylinder strip-shaped part sequentially penetrates through the right end of the extruder body and the cooling water tank, and the cylinder strip-shaped part is parallel to the axial center line of the extruder body;
the injection molding machine model sequentially comprises a screw rod, a sleeve, a movable die and a fixed die from left to right, wherein one end of the sleeve is sleeved on the screw rod in a matching manner, the other end of the sleeve is fixedly connected with the movable die, the sleeve is parallel to the die sinking direction of the movable die, and a second gear is arranged on the sleeve;
a second connecting rod is vertically arranged on a transmission shaft of the motor, arc-shaped teeth are arranged at the end part of the second connecting rod, the first gear and the second gear are symmetrically distributed by taking the transmission shaft of the motor as an object, and one end of each arc-shaped tooth is externally meshed and connected with the first gear;
the central angle of the arc-shaped teeth is not lower than 90 degrees and not higher than 180 degrees, and the radius of the arc-shaped teeth is more than four times of the radius of the first gear;
the movable mould is characterized in that a module is arranged between the movable mould and the fixed mould in a matched mode, a movable ejector rod is arranged in the fixed mould and is parallel to the mould opening direction of the movable mould, one end of the movable ejector rod is perpendicularly connected with the module, and the other end of the movable ejector rod is connected with a compression spring.
2. An ergonomic binding apparatus according to claim 1, wherein: the arc-shaped teeth are semi-arc-shaped teeth, and the radius of the arc-shaped teeth is equal to 8 times of the radius of the first gear.
3. An ergonomic binding apparatus according to claim 1, wherein: the arc-shaped teeth are quarter arc-shaped teeth, and the radius of the arc-shaped teeth is equal to 16 times of the radius of the first gear.
4. An ergonomic binding apparatus according to claim 3, wherein: the left end of the extruder body is provided with a feed hopper.
5. An ergonomic binding apparatus according to claim 4, wherein: the movable mould is characterized in that a sliding rail is arranged below the movable mould, the movable mould is arranged on the sliding rail in a sliding mode, and the sliding rail is arranged along the mould opening direction of the movable mould.
6. An ergonomic binding apparatus according to claim 5, wherein: the thread pitch of the lead screw is greater than the thickness of the module.
7. An instructional method based on the ergonomic binding device of any of claims 1 to 6, comprising the steps of:
starting a forward rotation button of a motor, and sequentially and synchronously playing dynamic interpretation of an extruder model and dynamic interpretation of an injection molding machine model;
starting a reverse button of a motor, and stopping broadcasting the dynamic interpretation of the extruder model and the dynamic interpretation of the injection molding machine model;
selecting arc-shaped teeth as semi-circular arc-shaped teeth, wherein the radius of the arc-shaped teeth is 8 times of the radius of the first gear, the arc-shaped teeth are arranged at the end part of the second connecting rod, one end of the arc-shaped teeth is in external meshing connection with the first gear, and the first step and the second step are repeated;
or step three, the arc-shaped teeth are quarter arc-shaped teeth, the radius of the arc-shaped teeth is equal to 16 times of the radius of the first gear, the arc-shaped teeth are arranged at the end part of the second connecting rod, one end of the arc-shaped teeth is in external meshing connection with the first gear, and the step one and the step two are repeated;
and step four, closing a power switch of the motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810533473.6A CN108735072B (en) | 2018-05-29 | 2018-05-29 | Engineering combined teaching method |
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| CN201810533473.6A CN108735072B (en) | 2018-05-29 | 2018-05-29 | Engineering combined teaching method |
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| CN108735072A CN108735072A (en) | 2018-11-02 |
| CN108735072B true CN108735072B (en) | 2020-05-19 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268242A (en) * | 1977-03-17 | 1981-05-19 | Howard Natter | Pedagogic molding apparatus |
| AT513481B1 (en) * | 2012-11-09 | 2014-05-15 | Engel Austria Gmbh | Simulation device and method |
| CN103617762B (en) * | 2013-12-12 | 2015-09-09 | 成都理工大学 | The gravitational décollement structure physical simulating device of ramp angles can be controlled |
| CN104008702A (en) * | 2014-06-18 | 2014-08-27 | 广西职业技术学院 | Injection molding simulating teaching aid for plastic product |
| CN205038903U (en) * | 2015-10-12 | 2016-02-17 | 北京石油化工学院 | Extruder model teaching aid |
| CN206471048U (en) * | 2017-01-05 | 2017-09-05 | 河源职业技术学院 | One kind is based on injection machine project simulation teaching hydraulic pressure practical traning platform |
| CN207397584U (en) * | 2017-08-04 | 2018-05-22 | 上海市建筑科学研究院 | A kind of digitlization integral type simulant building mortar spraying process carrying capacity experimental provision |
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