A friction and wear testing device for lens demolding with a lens blank

Abstract

The present application relates to the technical field of lens manufacturing, and specifically relates to a friction and wear experimental device for lens demolding mold stems, which comprises a machine table, a driving mechanism, a transmission mechanism and a mold stem inspection mechanism, the driving mechanism comprises a motor and a synchronous pulley mechanism, the transmission mechanism comprises an eccentric connecting rod mechanism and a guide rail sliding block mechanism, the mold stem inspection mechanism comprises a transmission shaft, a pressing plate structure and a plurality of mold stem inserts, and a buckle type structure is arranged between the guide rail sliding block mechanism and the transmission shaft and connected through the buckle type structure. The mold stem inspection mechanism comprises a transmission shaft, a pressing plate structure and a plurality of mold stem inserts, the guide rail sliding block mechanism drives the transmission shaft to do linear reciprocating motion, and then drives the pressing plate structure and the mold stem inserts to do linear reciprocating motion, so as to simulate the actual working condition of the mold stem inserts entering the mold, reduce the experimental cost and improve the experimental efficiency, and the guide rail sliding block mechanism and the transmission shaft are connected through the buckle type structure, so that the non-axial force transmission can be effectively cut off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lens manufacturing, in particular to a friction and wear experimental device for lens demolding mold stems. BACKGROUND

[0002] With the continuous development of optical technology, the application range of lenses is also expanding. There is a problem of serious wear of mold stems and mold in the actual production process of lenses, and when the mold stem is damaged by friction, the formed lens will not meet the design requirements. In order to solve this problem, the best combination of friction material and lubricant is researched, and a friction and wear experimental device needs to be designed.

[0003] The existing lens forming workshop injection molding machine pushes the mold stem into the mold by a high-precision mechanical arm to ensure that the mold stem only slides in the mold under axial force to push out the formed lens. In order to simulate the actual working condition, reduce the experimental cost and improve the experimental efficiency, a low-cost, low-precision actuating mechanism that only transmits axial force is needed to conduct experiments. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the prior art, and provides a friction and wear experimental device for lens demolding mold stems.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a friction and wear experimental device for lens demolding mold stems, comprising a machine table and a driving mechanism, a transmission mechanism and a mold stem inspection mechanism arranged on the machine table, the driving mechanism comprising a motor and a synchronous pulley mechanism, the motor being used to drive the synchronous pulley mechanism to move, the transmission mechanism comprising an eccentric connecting rod mechanism and a guide rail slider mechanism, the eccentric connecting rod mechanism being connected with the synchronous pulley mechanism and the guide rail slider mechanism respectively, the eccentric connecting rod mechanism being used to convert the rotary motion of the synchronous pulley mechanism into the linear reciprocating motion of the guide rail slider mechanism; the mold stem inspection mechanism comprising a transmission shaft, a pressing plate structure and a plurality of mold stem inserts, the guide rail slider mechanism being connected with the transmission shaft, a buckle structure being arranged between the guide rail slider mechanism and the transmission shaft and being connected through the buckle structure, the transmission shaft being connected with the pressing plate structure, the mold stem inserts being uniformly arranged on the pressing plate structure.

[0006] Further, the synchronous pulley mechanism comprises a large pulley, a small pulley and a synchronous belt, the synchronous belt connecting the large pulley and the small pulley to make the large pulley and the small pulley rotate synchronously, the motor being connected with the large pulley to drive the large pulley to rotate, the eccentric connecting rod mechanism being connected with the small pulley.

[0007] Further, the synchronous pulley mechanism comprises a tension pulley and a bolt adjusting structure, the tension pulley being connected with the synchronous belt, the bolt adjusting structure being used to adjust the position of the tension pulley to adjust the tightness of the synchronous belt.

[0008] Further, the eccentric connecting rod mechanism comprises an eccentric shaft and a connecting rod, the eccentric shaft is connected with the synchronous pulley mechanism and the connecting rod respectively, the synchronous pulley mechanism drives the eccentric shaft to rotate, and the eccentric shaft drives the connecting rod to move back and forth.

[0009] Further, the guide rail sliding block mechanism comprises a guide rail and a sliding block, the guide rail is arranged on the machine table, the sliding block can move back and forth on the guide rail, one end of the sliding block is connected with the eccentric connecting rod mechanism, and the other end of the sliding block is connected with the transmission shaft.

[0010] Further, the buckle type structure comprises a buckle and a clamping groove, the buckle is arranged on the transmission shaft, the clamping groove is arranged on the sliding block, and the buckle and the clamping groove are connected in a clamping groove type.

[0011] Further, the diameter of the clamping groove interface is greater than that of the buckle interface, so that the buckle and the clamping groove form a disconnected non-rigid connection.

[0012] Further, the transmission shaft is sleeved with a ball guide sleeve outside, and a support seat is arranged between the ball guide sleeve and the machine table.

[0013] Further, one end of the transmission shaft is provided with a square interface, a square groove matched with the square interface is arranged on the pressing plate structure, and the square interface is fixed in the square groove through bolts.

[0014] Further, the pressing plate structure comprises a left pressing plate, a right pressing plate and a plurality of connecting rods, the left pressing plate is connected with the transmission shaft, the mold core insert is arranged on the connecting rod, a secondary clamping groove is arranged between the left pressing plate and the right pressing plate, a secondary buckle matched with the secondary clamping groove is arranged on the connecting rod, and the width of the secondary clamping groove interface is greater than that of the secondary buckle interface, so that the secondary buckle and the secondary clamping groove form a disconnected non-rigid connection.

[0015] Further, the upper side of the secondary buckle is provided with an anti-rotation flat surface.

[0016] The beneficial effects of the present application: from the above description of the present application, compared with the prior art, the lens demolding die friction and wear test device of the present application includes a machine table, a driving mechanism, a transmission mechanism, a die inspection mechanism, the driving mechanism drives the synchronous pulley mechanism through the motor, the transmission mechanism includes an eccentric connecting rod mechanism and a guide rail slider mechanism, the rotation of the synchronous pulley mechanism is converted into the linear reciprocating motion of the guide rail slider mechanism through the eccentric connecting rod mechanism; the die inspection mechanism includes a transmission shaft, a pressing plate structure and a plurality of die inserts, the guide rail slider mechanism drives the transmission shaft to do linear reciprocating motion, and further drives the pressing plate structure and the die inserts to do linear reciprocating motion, to simulate the actual working condition of the die inserts entering the mold, reduce the experimental cost and improve the experimental efficiency, wherein the guide rail slider mechanism and the transmission shaft are connected through a buckle type structure, the buckle type structure is a disconnected connection structure, which can effectively cut off the non-axial force transmission, and the disconnected connection mode can reduce the installation precision requirement of the overall structure, the present application uses the mechanical structure with the lowest cost and low precision requirement to achieve the expected effect of simulation, and improves the authenticity and reliability of the simulation experiment. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of a lens demolding die friction and wear test device in a preferred embodiment of the present application;

[0018] Figure 2 It is a sectional view schematic diagram of a slider and a transmission shaft in a preferred embodiment of the present application;

[0019] Figure 3 It is a sectional view schematic diagram of a transmission shaft and a left pressing plate in a preferred embodiment of the present application;

[0020] Figure 4 It is a sectional view schematic diagram of a pressing plate structure and a die insert in a preferred embodiment of the present application;

[0021] Figure 5 It is a left view schematic diagram of a right pressing plate in a preferred embodiment of the present application;

[0022] The drawings show that: 1, machine table; 2, driving mechanism; 3, transmission mechanism; 4, die inspection mechanism; 5, buckle type structure; 21, motor; 22, synchronous pulley mechanism; 31, eccentric connecting rod mechanism; 32, guide rail slider mechanism; 41, transmission shaft; 42, pressing plate structure; 43, die insert; 44, ball guide sleeve; 45, support seat; 51, buckle; 52, clamping groove; 221, large pulley; 222, small pulley; 223, synchronous belt; 224, tension pulley; 225, bolt adjusting structure; 311, eccentric shaft; 312, connecting rod; 321, guide rail; 322, slider; 411, square interface; 421, left pressing plate; 422, right pressing plate; 423, connecting rod; 424, secondary clamping groove; 425, secondary buckle; 426, flat surface. DETAILED DESCRIPTION

[0023] The technical solutions in the present application will be described clearly and completely below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Referring to Figures 1-5 As shown in the preferred embodiment of the present application, a friction and wear test device for lens demolding mold core includes a machine table 1 and a driving mechanism 2, a transmission mechanism 3 and a mold core inspection mechanism 4 arranged on the machine table 1. The driving mechanism 2 includes a motor 21 and a synchronous pulley mechanism 22, the motor 21 is used to drive the synchronous pulley mechanism 22 to move, the transmission mechanism 3 includes an eccentric connecting rod mechanism 31 and a guide rail slider mechanism 32, the eccentric connecting rod mechanism 31 is connected with the synchronous pulley mechanism 22 and the guide rail slider mechanism 32 respectively, and the eccentric connecting rod mechanism 31 is used to convert the rotary motion of the synchronous pulley mechanism 22 into the linear reciprocating motion of the guide rail slider mechanism 32. The mold core inspection mechanism 4 includes a transmission shaft 41, a pressing plate structure 42 and a plurality of mold core inserts 43, the guide rail slider mechanism 32 is connected with the transmission shaft 41, a buckle structure 5 is arranged between the guide rail slider mechanism 32 and the transmission shaft 41 and connected through the buckle structure 5, the transmission shaft 41 is connected with the pressing plate structure 42, and the mold core inserts 43 are evenly arranged on the pressing plate structure 42.

[0026] The friction and wear experimental device for lens demolding with the mold core of the application comprises a machine table 1, a driving mechanism 2, a transmission mechanism 3, and a mold core inspection mechanism 4. The driving mechanism 2 is driven by a motor 21 to move a synchronous pulley mechanism 22. The transmission mechanism 3 comprises an eccentric connecting rod mechanism 31 and a guide rail slider mechanism 32. The eccentric connecting rod mechanism 31 converts the rotary motion of the synchronous pulley mechanism 22 into the linear reciprocating motion of the guide rail slider mechanism 32. The mold core inspection mechanism 4 comprises a transmission shaft 41, a pressing plate structure 42, and a plurality of mold core inserts 43. The guide rail slider mechanism 32 drives the transmission shaft 41 to move linearly, and further drives the pressing plate structure 42 and the mold core inserts 43 to move linearly, so as to simulate the actual working condition of the mold core inserts 43 entering the mold, reduce the experimental cost, and improve the experimental efficiency. The guide rail slider mechanism 32 and the transmission shaft 41 are connected through a buckle type structure 5. The buckle type structure 5 is a disconnected connection structure, which can effectively cut off the non-axial force transmission, and the disconnected connection mode can reduce the installation precision requirement of the overall structure. The application uses the mechanical structure with the lowest cost and low precision requirement to achieve the expected effect, and improves the authenticity and reliability of the simulation experiment.

[0027] As a preferred embodiment of the application, it can also have the following additional technical features:

[0028] In the embodiment, the synchronous pulley mechanism 22 comprises a large pulley 221, a small pulley 222, and a synchronous belt 223. The synchronous belt 223 connects the large pulley 221 and the small pulley 222 to make them rotate synchronously. The motor 21 is connected with the large pulley 221 to drive the large pulley 221 to rotate. The eccentric connecting rod mechanism 31 is connected with the small pulley 222. The synchronous belt 223 makes the large pulley 221 and the small pulley 222 rotate synchronously. The motor 21 drives the large pulley 221 to rotate, and further drives the small pulley 222 to rotate. The small pulley 222 drives the eccentric connecting rod mechanism 31 to move, so as to control and adjust the output rotating speed of the driving mechanism 2.

[0029] In the embodiment, the synchronous belt wheel mechanism 22 comprises a tension pulley 224 connected with the synchronous belt 223 and a screw adjusting structure 225 for adjusting the position of the tension pulley 224 to adjust the tightness of the synchronous belt 223. The synchronous belt wheel mechanism 22 adjusts the tightness of the synchronous belt 223 through the tension pulley 224 and the screw adjusting structure 225. Specifically, the U-shaped slot is opened on the mounting plate of the machine table 1 to allow the tension pulley 224 support to slide and thereby tension the synchronous belt 223. The threaded hole is opened on the fixed support of the tension pulley 224. When adjusting the tension, the two fixing screws of the fixed support of the tension pulley 224 are loosened, the long screw is passed through the top rod support of the tension pulley 224 and is screwed into the fixed support of the tension pulley 224, the fixed support of the tension pulley 224 is pulled to slide in the U-shaped slot, the tension function is realized, and the screw cooperation structure is used to pull the tension pulley 224, which is convenient and labor-saving in the adjustment process.

[0030] In the embodiment, the eccentric connecting rod mechanism 31 comprises an eccentric shaft 311 and a connecting rod 312. The eccentric shaft 311 is connected with the synchronous belt wheel mechanism 22 and the connecting rod 312. The synchronous belt wheel mechanism 22 drives the eccentric shaft 311 to rotate, and the eccentric shaft 311 drives the connecting rod 312 to move back and forth. The guide rail sliding block mechanism 32 comprises a guide rail 321 and a sliding block 322. The guide rail 321 is arranged on the machine table 1, and the sliding block 322 can move back and forth on the guide rail 321. One end of the sliding block 322 is connected with the eccentric connecting rod mechanism 31, and the other end is connected with the transmission shaft 41. The eccentric connecting rod mechanism 31 comprises an eccentric shaft 311 and a connecting rod 312. One end of the connecting rod 312 is connected with the eccentric shaft 311, and the other end constitutes a crank sliding block 322 mechanism with the guide rail sliding block mechanism 32. The motor 21 transmits power to the eccentric shaft 311 through the synchronous belt wheel mechanism 22. The eccentric shaft 311 drives one end of the connecting rod 312 to rotate, and the other end of the connecting rod 312 moves back and forth on the guide rail 321 with the sliding block 322, so as to convert the rotary motion of the synchronous belt wheel mechanism 22 into the linear reciprocating motion of the guide rail sliding block mechanism 32. The whole driving mechanism 2 and transmission mechanism 3 are designed to be simple, easy to realize, low in cost, and without high precision requirements.

[0031] In the embodiment, the buckle structure 5 includes a buckle 51 arranged on the transmission shaft 41 and a clamping groove 52 arranged on the sliding block 322. The buckle 51 and the clamping groove 52 are connected in a clamping manner. The diameter of the interface of the clamping groove 52 is larger than that of the buckle 51, so that the buckle 51 and the clamping groove 52 are connected in a disconnected and non-rigid manner. The transmission shaft 41 and the sliding block 322 are connected by the buckle structure 5. The diameter of the interface of the clamping groove 52 of the sliding block 322 is larger than that of the buckle 51 of the transmission shaft 41, so that the transmission shaft 41 and the sliding block 322 are connected in a disconnected and non-rigid manner. When the mechanism is actuated, the sliding block 322 and the transmission shaft 41 are in surface-to-surface contact. According to the force analysis, the transmission shaft 41 is only subjected to its own gravity, the thrust of the sliding block 322, and a very small non-axial force caused by the friction between the two contact surfaces. The disconnected connection plays a role of force unloading. The buckle structure 5 can weaken the transmission of most non-axial forces, avoid the transmission shaft 41 and the mold core insert 43 from being affected by a large non-axial force, and greatly reduce the installation precision requirements of the subsequent transmission shaft 41 guide support and guide rail 321.

[0032] In the embodiment, the transmission shaft 41 is sleeved with a ball guide sleeve 44, and a support seat 45 is arranged between the ball guide sleeve 44 and the machine table 1. The transmission shaft 41 slides on the support seat 45 provided with the ball guide sleeve 44. The support seat 45 can offset the gravity of the transmission shaft 41. A certain length of guide structure can improve the rigidity of the transmission shaft 41, prevent the transmission shaft 41 from being twisted and deformed to generate a non-axial force, and change the sliding friction between the transmission shaft 41 and the support seat 45 into rolling friction, thereby greatly reducing the friction and reducing the wear of the transmission shaft 41 and improving the transmission efficiency.

[0033] In the embodiment, one end of the transmission shaft 41 is provided with a square interface 411, the pressing plate structure 42 is provided with a square groove matched with the square interface 411, and the square interface 411 is fixed in the square groove by bolts. When the transmission shaft 41 is connected with the pressing plate structure 42, four small planes are milled on one side of the transmission shaft 41 to form the square interface 411. The square interface is connected in the square groove of the pressing plate structure 42 by bolts, so that the torsion caused by the rotation of the transmission shaft 41 during transmission is prevented from being transmitted to the left pressing plate 421.

[0034] In the embodiment, the pressing plate structure 42 comprises a left pressing plate 421, a right pressing plate 422, and a plurality of connecting rods 423, the left pressing plate 421 is connected with the transmission shaft 41, the die core insert 43 is arranged on the connecting rod 423, a secondary clamping groove 424 is arranged between the left pressing plate 421 and the right pressing plate 422, a secondary clamping buckle 425 is arranged on the connecting rod 423 and matched with the secondary clamping groove 424, the width of the interface of the secondary clamping groove 424 is greater than that of the secondary clamping buckle 425, so that the secondary clamping buckle 425 and the secondary clamping groove 424 form a disconnected non-rigid connection. The pressing plate structure 42 comprises the left pressing plate 421, the right pressing plate 422, and the plurality of connecting rods 423, when assembled, the connecting rod 423 is first passed through the secondary clamping groove 424 of the right pressing plate 422, then the left pressing plate 421 is bolted with the right pressing plate 422, the secondary clamping buckle 425 and the secondary clamping groove 424 of the connecting rod 423 form a disconnected secondary clamping buckle structure, the transmission of the non-axial force can be cut off again, and the disconnected connection is adopted, so that the installation precision requirement of the transmission shaft 41 can be reduced, the assembly is facilitated, and the experimental accuracy is improved.

[0035] In the embodiment, the upper side of the secondary clamping buckle 425 is provided with an anti-rotation flat surface 426. The upper side of the secondary clamping buckle 425 is provided with the flat surface 426, so that the force bearing condition of the die core insert 43 can be prevented from being damaged due to the rotation of the connecting rod 423 during transmission, and the experimental precision is improved.

[0036] Without conflict, those skilled in the art can freely combine and superimpose the above-mentioned additional technical features.

[0037] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, the features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A friction and wear test device for lens demoulding mold core, characterized by: The invention comprises a machine (1) and a driving mechanism (2), a transmission mechanism (3), and a mold core inspection mechanism (4) arranged on the machine (1); the driving mechanism (2) comprises a motor (21) and a synchronous pulley mechanism (22); the motor (21) is used to drive the synchronous pulley mechanism (22) to move; the transmission mechanism (3) comprises an eccentric connecting rod mechanism (31) and a guide rail slider mechanism (32); the eccentric connecting rod mechanism (31) is connected to the synchronous pulley mechanism (22) and the guide rail slider mechanism (32) respectively; the eccentric connecting rod mechanism (31) is used to connect the synchronous pulley mechanism (22) and the guide rail slider mechanism (32) to the mold core inspection mechanism (4); The rotational motion of the wheel mechanism (22) is converted into the linear reciprocating motion of the guide rail slider mechanism (32); the mold core inspection mechanism (4) comprises a transmission shaft (41), a pressure plate structure (42), and a plurality of mold core inserts (43); the guide rail slider mechanism (32) is connected to the transmission shaft (41); a snap-fit ​​structure (5) is provided between the guide rail slider mechanism (32) and the transmission shaft (41) and connected via the snap-fit ​​structure (5); the transmission shaft (41) is connected to the pressure plate structure (42); and the mold core inserts (43) are evenly arranged on the pressure plate structure (42); The guide rail and slider mechanism (32) comprises a guide rail (321) and a slider (322); the guide rail (321) is arranged on the machine platform (1); the slider (322) can move back and forth on the guide rail (321); one end of the slider (322) is connected to the eccentric connecting rod mechanism (31), and the other end is connected to the transmission shaft (41); The buckle structure (5) comprises a buckle (51) and a slot (52), wherein the buckle (51) is arranged on the transmission shaft (41), and the slot (52) is arranged on the slider (322), and the buckle (51) and the slot (52) are connected in a snap-fit ​​manner; The diameter of the slot (52) interface is larger than the diameter of the buckle (51) interface, so that the buckle (51) and the slot (52) form a disconnected non-rigid connection; The pressure plate structure (42) comprises a left pressure plate (421), a right pressure plate (422), and a plurality of connecting rods (423). The left pressure plate (421) is connected to the transmission shaft (41). The mold insert (43) is arranged on the connecting rod (423). A secondary card slot (424) is arranged between the left pressure plate (421) and the right pressure plate (422). A secondary buckle (425) cooperating with the secondary card slot (424) is arranged on the connecting rod (423). The width of the interface of the secondary card slot (424) is greater than the width of the interface of the secondary buckle (425), so that the secondary buckle (425) and the secondary card slot (424) form a disconnected non-rigid connection.

2. The friction and wear testing device for lens demoulding mold according to claim 1, characterized in that: The synchronous pulley mechanism (22) comprises a large pulley (221), a small pulley (222), and a synchronous belt (223). The synchronous belt (223) connects the large pulley (221) and the small pulley (222) so that the large pulley (221) and the small pulley (222) rotate synchronously. The motor (21) is connected to the large pulley (221) and is used to drive the large pulley (221) to rotate. The eccentric connecting rod mechanism (31) is connected to the small pulley (222).

3. The friction and wear testing device for lens demoulding mold core according to claim 2, characterized in that: The synchronous pulley mechanism (22) comprises a tensioning wheel (224) and a bolt adjustment structure (225); the tensioning wheel (224) is connected to the synchronous belt (223); and the bolt adjustment structure (225) is used to adjust the position of the tensioning wheel (224) to adjust the tightness of the synchronous belt (223).

4. The friction and wear testing device for lens demoulding mold core according to claim 1, characterized in that: The eccentric connecting rod mechanism (31) comprises an eccentric shaft (311) and a connecting rod (312). The eccentric shaft (311) is connected to a synchronous pulley mechanism (22) and a connecting rod (312) respectively. The synchronous pulley mechanism (22) drives the eccentric shaft (311) to rotate, and the eccentric shaft (311) drives the connecting rod (312) to move back and forth.

5. The friction and wear testing device for lens demoulding mold core according to claim 1, characterized in that: A ball guide sleeve (44) is provided on the outer side of the transmission shaft (41), and a support seat (45) is provided between the ball guide sleeve (44) and the machine platform (1).

6. The friction and wear testing device for lens demoulding mold core according to claim 1, characterized in that: One end of the transmission shaft (41) is provided with a square interface (411), and the pressure plate structure (42) is provided with a square groove that matches the square interface (411), and the square interface (411) is fixed in the square groove by bolts.

7. The friction and wear testing device for lens demoulding mold core according to claim 1, characterized in that: An anti-rotation cutting plane (426) is provided on the upper side of the secondary buckle (425).

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