Visual teaching demonstration device for stamping

Abstract

The present invention discloses a visual teaching demonstration device for stamping. In the middle of the top surface of the lower die base, there is a die holder fixedly connected for fixing the female die. Guide columns are fixedly connected to the top surface of the lower die base. The top of the guide columns is fixedly connected with a support plate. An upper die base is arranged between the support plate and the die holder. In the middle of the support plate, there is a threaded support sleeve fixedly arranged. The threaded support sleeve penetrates through the support plate up and down. A matching screw rod penetrates through the threaded support sleeve. The bottom of the screw rod extends downward into the top surface of the upper die base and is rotatably connected. The top end of the screw rod is also fixedly connected with a torque wrench. A male die is arranged at the bottom of the upper die base. A stripper plate is fixedly connected to the top of the die holder. A through hole matching the male die penetrates through the stripper plate. The male die, the female die, the die holder, and the die top pressing block for fixing the female die to the die holder are all transparent. From the above structure, it can be seen that the visual teaching demonstration device for stamping of the present invention realizes the influence of different punching pressures and different-sized matching dies on the stamping workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping teaching demonstration aids, and particularly to a visual teaching demonstration device for stamping. Background Art

[0002] "Introduction to Mold Making Practice" is generally a required basic professional course for students majoring in mold design and manufacturing in higher vocational colleges. The main task of the course is to make a simple stamping mold by using manual tools such as files, saw blades, chisels, and hammers, so that students can learn the basic knowledge of the structural function composition, working process of the simple stamping mold, as well as the processing, assembly and debugging of mold parts during the manual practice of the mold, and cultivate the basic operation skills of mold fitters such as sawing, filing, scribing, drilling, reaming, and tapping, laying a foundation for learning subsequent core mold courses and related vocational skills. In the specific implementation process of the course teaching, it generally includes basic teaching stages such as task decomposition and familiarity, mold part processing and production, mold part assembly, trial molding and adjustment. After the processing and assembly of the mold parts are completed, through the actual trial molding and adjustment process, let the students discover and correctly analyze the manufacturing defects and their causes of their respective mold parts in the processing and assembly process, and then provide appropriate solutions for the reasonable adjustment and repair of the mold, so that the students can more intuitively understand and master the structural function composition of the stamping mold, the specific working process, as well as the process technical knowledge and precautions of part processing and production. However, it is very difficult to conduct effective trial molding in the actual teaching implementation process of the course, and it is difficult to achieve the expected teaching goals of the course well. Because the teaching carrier of the stamping mold is made by students who have no basic knowledge of the mold for the first time using manual tools, and the basic knowledge of students with diversified sources in higher vocational colleges is uneven. Most of the mold parts are not made with high precision. After the mold is assembled, it either cannot move flexibly, or the clearance between the convex and concave dies is large and uneven. It is very easy to cause equipment damage and personal injury when conducting trial molding on a real press. At the same time, it is also difficult for students to intuitively understand what specific impacts the change of the clearance between the convex and concave dies will have on the mold properties, working performance, mold service life and product quality, and the teaching quality of the course is greatly reduced.

[0003] Although the patent named "Teaching Aid for Mutual Change of Stamping Die Structure" discloses a teaching aid for demonstrating the stamping process, this teaching aid only shows the stamping process, and there is a need to conduct trial molding on a real press as mentioned above. Once there are problems with the mold fit, it is very easy to damage the equipment or even cause safety accidents during the trial molding process. Moreover, this teaching aid cannot observe the deformation process of the workpiece during the stamping process, nor can it study the influence of different stamping pressures and different mold size combinations on the stamping effect of the stamping parts; nor can it study the influence of different stamping pressures and different mold size combinations on the service life of the stamping mold. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a visual teaching demonstration device for stamping. The device has a simple structure, a visual and intuitive working demonstration process, and is safe, convenient and reliable to operate. It can effectively serve as a teaching carrier for stamping die trial and fully meet the practical teaching needs of the "Introduction to Mold Making Training" course. This device mainly realizes the following functions in the specific implementation of course teaching: First, the stamping die parts are all made of transparent materials, and the punching speed is easy to control manually, so that the cutting changes of the material strip in the die and the functions of the various components of the die can be intuitively presented to the students during the punching process, which is convenient for mold beginners to intuitively understand the structural function composition and working principle of the stamping die; second, by conveniently replacing the concave die with the same shape but different inner hole size embedded in the concave die seat, the matching clearance between the punch and the die is changed, so that the teaching carrier can intuitively reflect the influence of the change of the matching clearance between the punch and the die on the size of the die punching force, the life of the die, the product quality, and the evolution process of the die structure properties from cutting to drawing during the teaching demonstration, so that mold beginners can easily understand and master the relevant precautions in the design, processing, assembly, trial mold finishing and other links of stamping die parts; third, the whole device is installed on a trolley, which is easy to move, so that the device can be moved and adjusted at any time according to the actual needs of teaching during course teaching, so that students can see more clearly and intuitively.

[0005] The technical solution adopted by the present invention is:

[0006] The visual teaching demonstration device of stamping comprises a lower die seat, a die seat for fixing a die is fixedly connected to the middle of the top surface of the lower die seat, guide pillars are fixedly connected to the top surface of the lower die seat and the four corners of the die seat, a support plate is fixedly connected to the top of the guide pillar, an upper die seat movable up and down along the guide pillar is arranged between the support plate and the die seat, a threaded support sleeve is fixedly arranged in the middle of the support plate, the threaded support sleeve passes through the support plate up and down, a matching screw is passed through the threaded support sleeve, and the bottom of the screw extends downward into the upper The top surface of the die base is rotatably connected to the thrust bearing fixed to the upper die base, the top of the screw is also transmission-connected to the driving device, the bottom of the upper die base is provided with a matching punch corresponding to the die in the die base, the top of the die base is also fixedly connected with a stripper plate through pads provided on both sides of the die, the stamping sheet is placed and fixed on the top surface of the die base, in the area between the pads, a through hole matching the punch is penetrated on the stripper plate, the punch, die, die base and the die fixing block that fixes the die to the die base are all transparent.

[0007] A further improvement of the present invention is that the bottom surface of the die seat is provided with a matching and connected blanking hole A corresponding to the die, and the lower die seat is provided with a matching and connected blanking hole B corresponding to the blanking hole A.

[0008] A further improvement of the present invention is that the top surface of the female die seat is provided with a female die placement groove matching the outer side wall of the female die. The top of the blanking hole A penetrates upward through the bottom of the female die placement groove and is in matching communication with the inner hole of the female die in the female die placement groove. One side of the top of the female die seat, located between the cushion blocks, is provided with a notch, and a female die fixing block for fixing the female die is fixedly connected to the notch. The female die fixing block is transparent.

[0009] A further improvement of the present invention is that the transparent female die fixing block, the female die, and the male die form a magnifying lens.

[0010] A further improvement of the present invention is that the strength of the female die and the male die is greater than the strength of the stamping sheet.

[0011] A further improvement of the present invention is that the inner wall of the female die and the corresponding outer side wall of the male die are in close contact, transitional fit, or clearance fit.

[0012] A further improvement of the present invention is that the top of the lower die seat is provided with a positioning pin that is positioned and matched with the positioning groove provided at the bottom of the female die seat. The bottom of the positioning pin is connected to the bottom of the movable groove provided in the lower die seat through a spring. The top end of the positioning pin is a ball head. When the spring is only affected by the gravity of the positioning pin, the top end of the positioning pin 22 extends out of the movable groove. When the positioning pin is subjected to a force and compresses the spring, the positioning pin moves downward into the movable groove.

[0013] A further improvement of the present invention is that the male die is fixed to the male die fixing plate by a backing plate at the bottom of the upper die seat.

[0014] A further improvement of the present invention is that the upper die seat is connected to the guide pillar through a guide sleeve provided for up and down movement.

[0015] A further improvement of the present invention is that the lower die seat is fixedly connected to the turnover cart seat, and universal rollers are respectively provided at the four corners of the bottom of the turnover cart seat.

[0016] A further improvement of the present invention is that the stamping sheet includes multiple unit layers fixed to each other from top to bottom. The unit layers have the same thickness and the same material, and the colors of adjacent two unit layers are different.

[0017] A further improvement of the present invention is that a shaft rod is coaxially provided at the top end of the guide pillar. A connecting thread is provided on the upper part of the side wall of the shaft rod. The support plate is provided with a matching positioning through hole corresponding to the shaft rod. The axial length of the shaft rod is greater than the axial length of the positioning through hole, and the bottom of the connecting thread extends into the positioning through hole. The top of the shaft rod is fixed to the top surface of the support plate through a nut and a gasket in sequence.

[0018] A further improved solution of the present invention is that the lower die base and the female die base are fixedly connected by connecting bolts.

[0019] A further improved solution of the present invention is that the driving device is a torque wrench, and the torque wrench is a digital display torque wrench with adjustable different torques, and has functions of data display, memory and output.

[0020] A further improved solution of the present invention is that the driving device is a driving motor with variable output power.

[0021] The beneficial effects of the present invention are as follows:

[0022] First, the stamping visual teaching demonstration device of the present invention does not need to use a press. It directly uses a torque wrench to apply the corresponding downward pressure at different torques to stamp the stamping parts in the molds with different size fits, and can be directly observed; moreover, it is also convenient to analyze the influence of different punching pressures and molds with different size fits on the stamping effect.

[0023] Second, the stamping visual teaching demonstration device of the present invention solves the problems that higher vocational students with uneven basic knowledge cannot really and effectively debug the molds made by hand tools for the first time, and it is difficult for students to intuitively understand the structural function composition of the molds, the working process of the molds, and what specific impacts the change of the clearance between the male and female dies will have on the nature of the molds, the service life of the molds, and the product quality.

[0024] Third, in the stamping visual teaching demonstration device of the present invention, the female die part is designed as a female die base and a female die for inlaying and replacement. By replacing the female die with the same outer shape but different inner hole sizes inlaid in the female die base, the clearance between the male and female dies is changed, which is convenient for the teaching carrier to intuitively reflect the influence of the clearance between the male and female dies on the molds and their products during the teaching demonstration process.

[0025] Fourth, in the stamping visual teaching demonstration device of the present invention, the punching force of the mold uses a torque wrench to drive the screw rod to drive the punch to move up and down. It is not only safe and reliable in operation and convenient for manual control of the force application rhythm, but also the influence of the change of the clearance between the male and female dies on the punching force can be intuitively displayed through the digital display of the torque wrench.

[0026] Fifth, in the stamping visual teaching demonstration device of the present invention, the punching force of the mold uses a driving motor to drive the screw rod to drive the punch to move up and down, and the output power can be accurately set, so as to observe and understand the influence of different punching forces on stamping; moreover, according to the teaching requirements, through a wider range of power adjustment, the influence of the punching force on stamping and stretching the stamping plate can be understood.

[0027] Sixth, in the stamping visual teaching demonstration device of the present invention, the punch, the die, and the die holder in the mold are all made of transparent materials, forming a magnifying lens, so that during the blanking process of the mold, the cutting changes of the stamping sheet in the mold and the functional roles of each part of the mold can be visually presented in front of the students.

[0028] Seventh, in the stamping visual teaching demonstration device of the present invention, through the structure of the stamping sheet, the cross-sectional structure of the stamping sheet after stamping can be observed, so as to understand the deformation of the stamping sheet caused by stamping.

[0029] Eighth, the stamping visual teaching demonstration device of the present invention is fixed on the turnover cart seat, which is easy to move, so that the orientation of the device can be adjusted at any time according to the actual needs of teaching during the course teaching, enabling students to better and more intuitively understand and master the stamping die structure, working process, and the influence of the clearance on the die and its products, improving the classroom teaching effect and the quality of course teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic front sectional view of the present invention.

[0031] Figure 2 It is a schematic top view of the present invention after removing the punch and the components above the punch.

[0032] Figure 3 It is a three-dimensional schematic view of the die holder of the present invention.

[0033] Figure 4 It is a three-dimensional schematic view of the die holder with the die installed. DETAILED DESCRIPTION OF THE INVENTION

[0034] Combined with Figures 1 to 4It can be seen that the visual teaching demonstration device for stamping includes a lower die base 1. In the middle of the top surface of the lower die base 1, there is a die holder 3 fixedly connected for fixing a female die 4. At the four corners of the top surface of the lower die base 1 and located at the positions of the die holder 3, there are guide columns 2 fixedly connected. At the top of the guide columns 2, there is a support plate 9 fixedly connected. Between the support plate 9 and the die holder 3, there is an upper die base 8 that moves up and down along the guide columns 2. In the middle of the support plate 9, there is a threaded support sleeve 12 fixedly provided. The threaded support sleeve 12 penetrates through the support plate 9 up and down. Inside the threaded support sleeve 12, there is a matching screw rod 11 penetrating. The bottom of the screw rod 11 extends downward into the top surface of the upper die base 8 and is rotatably connected to a thrust bearing 13 fixedly provided on the upper die base 8. The top end of the screw rod 11 is also fixedly connected with a digital display torque wrench 10. At the bottom of the upper die base 8, corresponding to the female die 4 inside the die holder 3, there is a matching male die 18. On the top of the die holder 3, there is also a stripper plate 6 fixedly connected through pads 5 provided on both sides of the female die 4. The stamping sheet 19 is placed and fixed in the area on the top surface of the die holder 3 and between the pads 5. There is a through hole matching the male die 18 penetrating through the stripper plate 6. The male die 18, the female die 4, the die holder 3, and the die fixing block 23 for fixing the female die 4 to the die holder 3 are all transparent.

[0035] On the bottom surface of the die holder 3, corresponding to the female die 4, there is a matching and communicating blanking hole A24. Corresponding to the blanking hole A24 on the lower die base 1, there is a matching and communicating blanking hole B25.

[0036] On the top surface of the die holder 3, there is a die placement groove 26 matching the outer wall of the female die 4. The top of the blanking hole A24 passes upward through the bottom of the die placement groove 26 and is in matching communication with the inner hole of the female die 4 in the die placement groove 26. On one side of the top of the die holder 3 and between the pads 5, there is a notch 27. The notch 27 is fixedly connected with a die fixing block 23 for fixing the female die 4. The die fixing block 23 is transparent.

[0037] The transparent die fixing block 23, the female die 4, and the male die 18 form a magnifying lens.

[0038] The strength of the female die 4 and the male die 18 is greater than the strength of the stamping sheet 19.

[0039] Between the inner wall of the female die 4 and the corresponding outer wall of the male die 18, there is a fitting, transition fit, or clearance fit.

[0040] On the top of the lower die base 1, there is a positioning pin 22 that is positioned and matched with a positioning groove provided at the bottom of the die holder 3. The bottom of the positioning pin 22 is connected to the bottom of the movable groove provided on the lower die base 1 through a spring. The top end of the positioning pin 22 is a ball head. When the spring is only under the action of the gravity of the positioning pin, the top end of the positioning pin 22 extends out of the movable groove. When the positioning pin 22 is subjected to a force and compresses the spring, the positioning pin 22 moves downward into the movable groove.

[0041] The bottom of the upper die holder 8 fixes the punch 18 to the punch fixing plate 17 through a backing plate 16.

[0042] The upper die holder 8 is vertically movably connected to the guide pillar 2 through a fixedly provided guide bushing 7.

[0043] The lower die holder 1 is fixedly connected to the turnover cart seat 21, and universal rollers are respectively provided at the four corners of the bottom of the turnover cart seat 21.

[0044] The stamping sheet material 19 includes multiple unit layers fixed to each other from top to bottom. The unit layers have the same thickness, the same material, and different colors for adjacent two unit layers.

[0045] A shaft rod is coaxially provided at the top end of the guide pillar 2. A connecting thread is provided on the upper part of the side wall of the shaft rod. The support plate 9 is provided with a matching positioning through hole corresponding to the shaft rod. The axial length of the shaft rod is greater than the axial length of the positioning through hole, and the bottom of the connecting thread extends into the positioning through hole. The top of the shaft rod is fixed to the top surface of the support plate 9 through a nut 14 and a gasket 15 in sequence.

[0046] The lower die holder 1 and the die holder 3 are fixedly connected through a connecting bolt 20.

[0047] The torque wrench 10 is a digital display torque wrench that can adjust different torques and has functions of data display, memory and output.

[0048] The stamping sheet 19 is multiple layers of cardboard pressed and fixed to each other.

[0049] The materials of the punch 18, the female die 4, the die holder 3 and the female die fixing block 23 that fixes the female die 4 to the die holder 3 are transparent organic glass.

[0050] When the present invention is in use, first, the torque wrench 10 drives the screw rod 11 to rotate reversely, so as to drive the upper die base 8 and the punch 18 to move upward along the guide pillar 2 until they are separated from the stripper plate 6; then, after placing one of the female dies 4 in the female die placement groove 26, the female die 4 is fixed in the female die placement groove 26 by placing and fixing the female die fixing block 23 at the notch 27; then, the stamping material plate 19 is placed on the top surface of the female die base 3, within the area enclosed by the stripper plate 6 and the cushion block 5; set the torque value of the torque wrench 10, and drive the screw rod 11 to rotate forward, so as to drive the upper die base 8 and the punch 18 to move downward along the guide pillar 2 at a constant speed until they contact the stamping material plate 19, and the punch 18 continues to move downward under the rotation of the torque wrench 10 and stamps the stamping material plate 19; until after the stamping of the stamping material plate 19 is completed, then drive the screw rod 11 to rotate reversely by the torque wrench 10, so as to drive the upper die base 8 and the punch 18 to move upward along the guide pillar 2 until they are separated from the stripper plate 6; during the stamping process of the stamping material plate 19, the deformation process of the stamping material plate 19 during stamping can be observed through the magnifying lens formed by the transparent female die fixing block 23, the female die 4 and the punch 18; in addition, the edge structure of the stamped part punched out from the stamping material plate 19 after stamping and the stamping edge structure of the remaining waste material plate after stamping can be observed respectively.

[0051] After the stamping of the stamping material plate 19 is completed multiple times under the action of the same torque value, then by adjusting the torque value of the torque wrench 10, the stamping material plate 19 is stamped respectively; when the torque values of the torque wrench 10 that can be used to complete the stamping of the stamping material plate 19 have all been completed, then replace another female die 4 with a different size fit with the punch 18 and continue to stamp the stamping material plate 19 with the respective torque values of the torque wrench 10; then repeat the above actions again until all the female dies 4 have stamped the stamping material plate 19 with the respective torque values of the torque wrench 10.

[0052] Finally, analyze the influence of the stamping force on the stamping of the material plate and the influence of the size fit between the punch 18 and the female die 4 on the stamping of the material plate according to all the stamping results.

[0053] This application can also perform multiple stampings on the stamping plate 19 with the same torque value and the same dimensional fit between the punch 18 and the die 4 until the punch 18 or the die 4 wears out; then maintain the dimensional fit between the punch 18 and the die 4, and then perform stampings on the stamping plate 19 at other torque values respectively until the punch 18 or the die 4 wears out; when the punch 18 and the die 4 under a certain dimensional fit have completed the wear experiments of the punch 18 and the die 4 at different torque values, then replace the die 4 with a different dimensional fit with the punch 18 and repeat the above actions; until all dies with different dimensional fits with the punch 18 have completed the wear experiments of the punch 18 or the die 4; and analyze the influence of different torque values and different dimensional fits on the service life values of the punch 18 and the die 4 according to the results of each experiment.

[0054] This application can even perform mechanical analysis between the punching force, the clearance between the punch 18 and the die 4, and the punching and stretching effects on the stamping plate 19 by adjusting a wider range of punching force ranges.

Claims

1. The usage method of a visual teaching demonstration device for stamping, characterized in that: The device comprises a lower die base (1), a die base (3) for fixing a die (4) is fixedly connected to the middle of the top surface of the lower die base (1), guide pillars (2) are fixedly connected to the top surface of the lower die base (1) and at the four corners of the die base (3), a support plate (9) is fixedly connected to the top of the guide pillars (2), an upper die base (8) movable up and down along the guide pillars (2) is provided between the support plate (9) and the die base (3), a threaded support sleeve (12) is fixedly provided in the middle of the support plate (9), the threaded support sleeve (12) passes through the support plate (9) up and down, a matching screw (11) is passed through the threaded support sleeve (12), the bottom of the screw (11) extends downward into the top surface of the upper die base (8), and The top end of the screw rod (11) is also connected to the torque wrench through a thrust bearing (13) fixedly provided on the upper die seat (8). A matching punch (18) is provided at the bottom of the upper die seat (8) corresponding to the die (4) in the die seat (3). The top of the die seat (3) is also fixedly connected to a stripper plate (6) via cushion blocks (5) provided on both sides of the die (4). The stamping sheet (19) is placed and fixed on the top surface of the die seat (3) and in an area between the cushion blocks (5). A through hole matching the punch (18) is provided on the stripper plate (6). The punch (18), the die (4), the die seat (3) and the die fixing block (23) fixing the die (4) to the die seat (3) are all transparent. The transparent concave mold fixing block (23), the concave mold (4) and the convex mold (18) form a magnifying lens; The stamping sheet (19) comprises a plurality of mutually fixed unit layers from top to bottom, the unit layers have the same thickness and material, and two adjacent unit layers have different colors; The inner wall of the female die (4) and the corresponding outer wall of the male die (18) are in transition fit or clearance fit; The method of use comprises: during the stamping process of the stamping sheet, the deformation process of the stamping sheet during the stamping process is observed through a transparent magnifying lens formed by a concave die fixing block, a concave die and a convex die; and the edge structure of the stamped part punched out of the stamped sheet after the stamping and the stamping edge structure of the waste sheet remaining after the stamping are observed respectively; After completing multiple stamping of the stamping sheet under the same torque value, the stamping sheet is stamped separately by adjusting the torque value of the torque wrench; after the stamping is completed, the die matching the punch of different sizes is replaced and the stamping is continued; and the above actions are repeated again until all the die have stamped the stamping sheet through the torque values ​​of the torque wrench; Based on all the stamping results, the influence of the stamping force on the stamping of the stamping sheet and the influence of the size matching between the punch and the die on the stamping of the stamping sheet are analyzed.

2. The usage method of a visual teaching demonstration device for stamping according to claim 1, characterized in that: The bottom surface of the die seat (3) is provided with a matching and connected blanking hole A (24) corresponding to the die (4), and the lower die seat (1) is provided with a matching and connected blanking hole B (25) corresponding to the blanking hole A (24).

3. The usage method of a visual teaching demonstration device for stamping according to claim 2, characterized in that: The top surface of the female die seat (3) is provided with a female die placement groove (26) that matches the outer wall of the female die (4). The top of the blanking hole A (24) passes upward through the bottom of the female die placement groove (26) and is in matching communication with the inner hole of the female die (4) in the female die placement groove (26). One side of the top of the female die seat (3) located between the cushion blocks (5) is provided with a notch (27), and a female die fixing block (23) for fixing the female die (4) is fixedly connected to the notch (27). The female die fixing block (23) is transparent.

4. The usage method of a visual teaching demonstration device for stamping according to claim 3, characterized in that: The strength of the female die (4) and the male die (18) is greater than the strength of the stamping sheet (19).

5. The usage method of a visual teaching demonstration device for stamping according to claim 1, characterized in that: The bottom of the upper die seat (8) fixes the male die (18) to the male die fixing plate (17) through a backing plate (16).

6. The usage method of a visual teaching demonstration device for stamping according to claim 1, characterized in that: The upper die seat (8) is vertically movably connected to the guide pillar (2) through the guide sleeve (7) provided for fixing.

7. The usage method of a visual teaching demonstration device for stamping according to claim 1, characterized in that: The lower die seat (1) is fixedly connected to the turnover trolley seat (21), and universal rollers are respectively provided at the four corners of the bottom of the turnover trolley seat (21).

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