Tail cutting structure applied to production of ceramic capacitors and piezoresistors

Abstract

The utility model relates to the technical field of electronic component processing, in particular to a tail cutting structure applied to ceramic capacitor and piezoresistor production, which comprises a feeding mechanism, a cutter mechanism and a transverse transmission rod connected with the cutter mechanism. The cam disc and the cutter mechanism are arranged side by side, and the cam disc horizontally rotates in the circumferential direction; the vertical hinge bracket is arranged between the cutter mechanism and the cam disc; the horizontal longitudinal push rod transversely penetrates through the vertical hinge support and is hinged to the vertical hinge support, one end of the horizontal longitudinal push rod is hinged to the transverse transmission rod, and the other end of the horizontal longitudinal push rod is provided with a sliding wheel which horizontally and circumferentially moves; the sliding wheel is embedded in a cam ring groove formed in the cam disc and horizontally and circumferentially slides along the cam ring groove. The utility model has the advantages of high processing precision, space saving and the like.

Description

Technical Field

[0001] This utility model relates to the field of ceramic capacitor and varistor production, and in particular to a cutting device for the tail end of the leads of ceramic capacitors and varistors. Background Technology

[0002] In the production process of ceramic capacitors and varistors, the leads are first fixed at equal intervals on a paper tape, and then the capacitor or resistor body is die-cast onto the leads. Because the leads are very small, a certain length is usually reserved for easy and precise positioning. After the capacitor or resistor is finished, the excess lead ends are cut off. For example, the technical solution disclosed in Chinese Utility Model Patent Application No. 202020100237.8, entitled "A Multifunctional Capacitor Lead Cutting Machine," uses a cylinder to drive a cutting head to cut off the lead ends. However, this technology requires reserving space for the cylinder piston rod, occupying a large area.

[0003] Chinese utility model patent application number 202010237819.5, entitled "An Automatic Cutting Device", discloses a technical solution for cutting wire by using an eccentric wheel to drive a cutter head. In this technical solution, one end of the transmission rod is hinged to the eccentric wheel, and the other end of the transmission rod is hinged to a bracket with a cutter head. The bracket is fixed on a slider, and the slider is installed on a vertical track. In this way, the eccentric wheel drives the cutter head to move up and down to cut the wire. However, if this technology is applied to the cutting of the leads of ceramic capacitors and varistors, the following technical problems will exist: Since the transmission rod is hinged to one end of the eccentric wheel and rotates 360 degrees with the rotation of the eccentric wheel, the left and right bending amplitude of the transmission rod is very large. Moreover, the vibration generated by the motor during operation can be directly transmitted to the transmission rod through the hinge shaft, causing resonance, which makes the vibration intensity of the cutting head very large. Since ceramic capacitors and varistors are very small electronic components, even a small vibration of the cutting head will affect the accuracy of the lead cutting, resulting in unstable product quality and poor product quality. Therefore, the above device is not suitable for cutting the leads of ceramic capacitors and varistors.

[0004] Given the above-mentioned shortcomings of the existing technology, the applicant believes it is necessary to improve it to provide a structure with high processing precision that can be applied to the cutting of the lead ends of ceramic capacitors and varistors. Utility Model Content

[0005] The purpose of this invention is to solve the above-mentioned problems and shortcomings, and to provide a tail-cutting structure for the production of ceramic capacitors and varistors. In this tail-cutting structure, the horizontal longitudinal push rod is embedded in the cam ring groove of the cam disk through a sliding wheel to reduce the vibration energy on the horizontal longitudinal push rod. At the same time, by converting the horizontal circumferential motion of the cam disk into the horizontal left-right swing of the horizontal longitudinal push rod, and then using the horizontal left-right swing motion to drive the transverse transmission rod to make back-and-forth reciprocating motion, the left-right bending amplitude of the transverse transmission rod is greatly reduced. As a result, the vibration of the cutting mechanism is very small, and it can cut the leads of ceramic capacitors and varistors very accurately, greatly improving product quality.

[0006] The technical solution of this utility model is implemented as follows: a tail-cutting structure applied to the production of ceramic capacitors and varistors, including a feeding mechanism, a cutting mechanism, and a transverse transmission rod connected to the cutting mechanism; characterized in that: it also includes a cam disk arranged side by side with the cutting mechanism and rotating horizontally in the circumferential direction; a vertical hinged bracket disposed between the cutting mechanism and the cam disk; a horizontal longitudinal push rod that passes through the vertical hinged bracket and is hinged to the vertical hinged bracket, one end of the horizontal longitudinal push rod being hinged to the transverse transmission rod, and the other end of the horizontal longitudinal push rod being equipped with a horizontally circumferentially moving sliding wheel, the sliding wheel being embedded in a cam ring groove provided in the cam disk and sliding horizontally in the circumferential direction along the cam ring groove.

[0007] Furthermore, the cam disk is provided with a circumferential convex edge and a central cam portion, and a cam ring groove is formed between the circumferential convex edge and the central cam portion.

[0008] Furthermore, the feeding mechanism includes a fixed clamping base, a movable elastic clamping assembly, and a mounting bracket; the mounting bracket is fixedly assembled with the fixed clamping base, and a gap is formed between the mounting bracket and the fixed clamping base for the movable elastic clamping assembly to move and be accommodated; the movable elastic clamping assembly is arranged in the gap and is movably connected to the mounting bracket; a groove for the feeding belt to pass through is also formed between the movable elastic clamping assembly and the fixed clamping base.

[0009] The beneficial effects of this utility model are:

[0010] First, in this application, the horizontal longitudinal push rod is fitted into the cam ring groove of the cam disc via a sliding wheel. In this way, the vibration generated by the motor during operation is absorbed by the sliding wheel and then transmitted to the horizontal longitudinal push rod, thus greatly reducing the vibration energy on the horizontal longitudinal push rod and avoiding resonance. At the same time, when the disc cam rotates horizontally, it drives the horizontal longitudinal push rod to swing back and forth on the horizontal plane with the vertical hinge bracket as the fulcrum, which in turn drives the transverse transmission rod to reciprocate back and forth and drive the cutting mechanism to perform the cutting action. Since the end of the transverse transmission rod only swings slightly left and right with the back and forth swing of the horizontal longitudinal push rod, its swing amplitude is very small. Therefore, the vibration on the cutting mechanism is also very small, which can cut the tail end of the pin very accurately, thereby ensuring product quality.

[0011] In addition, the transverse transmission rod and the cam disc are arranged side by side, which can make full use of the space in the longitudinal direction of the production line. The cam disc does not need to occupy additional space in the transverse direction, thereby shortening the length of the ceramic capacitor and varistor production line and greatly improving space utilization. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the cam disk in this utility model.

[0014] Figure 3 This is a schematic diagram of the horizontal longitudinal push rod in this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of the neutral hinged bracket of this utility model.

[0016] Figure 5 This is a schematic diagram of the feeding mechanism in this utility model.

[0017] Figure 6 This is a schematic diagram of the mounting bracket in this utility model.

[0018] Figure 7 This is a schematic diagram of the structure of the fixed clamping base in this utility model.

[0019] Figure 8 This is a schematic diagram of the cutting mechanism in this utility model. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] like Figure 1As shown, this utility model provides a tail-cutting structure for the production of ceramic capacitors and varistors, including a feeding mechanism 2, a cutting mechanism 3, and a transverse transmission rod 4 connected to the cutting mechanism 3; to achieve the purpose proposed by this utility model, it also includes a cam disk 5 arranged side by side with the cutting mechanism 3 and rotating horizontally in the circumferential direction; a vertical hinged bracket 7 disposed between the cutting mechanism 3 and the cam disk 5; a horizontal longitudinal push rod 6 that passes through the vertical hinged bracket 7 and is hinged to the vertical hinged bracket 7, one end of the horizontal longitudinal push rod 6 is hinged to the transverse transmission rod 4, and the other end of the horizontal longitudinal push rod 6 is equipped with a horizontally circumferentially moving sliding wheel 61, which is embedded in a cam ring groove 51 provided in the cam disk 5 and slides horizontally in the circumferential direction along the cam ring groove 51. In practical applications, the aforementioned feeding mechanism 2, cutting mechanism 3, transverse transmission rod 4, cam disk 5, horizontal longitudinal push rod 6, and vertical hinge bracket 7 are mounted on the installation platform 1 of the ceramic capacitor and varistor production line. The motor drives the cam disk 5 to move horizontally in the circumferential direction, and the horizontal longitudinal push rod 6 slides horizontally in the circumferential direction along the cam ring groove 51 through the sliding wheel 61. It swings back and forth with the vertical hinge bracket 7 as the fulcrum, thereby driving the transverse transmission rod 4 to move back and forth. When the transverse transmission rod 4 moves back and forth, it drives the cutting mechanism 3 to perform a cutting action, cutting off the tail ends of the ceramic capacitors and varistors on the feeding mechanism 2. During this process, the vibration generated by the motor is first transmitted to the sliding wheel 61, and then to the horizontal longitudinal push rod 6. In this process, the sliding wheel 61 can absorb most of the vibration energy, thereby greatly reducing the vibration energy on the horizontal longitudinal push rod 6. At the same time, it can also greatly reduce the left and right swing amplitude of the transverse transmission rod 4. Therefore, the vibration on the cutting mechanism 3 in this invention is very small, so that the tail end of the pin can be cut very accurately, ensuring product quality. In addition, the transverse transmission rod 4 and the cam disk 5 are arranged side by side, which can make full use of the space in the longitudinal direction of the production line. The cam disk 5 does not need to occupy additional space in the transverse direction, thereby shortening the length of the ceramic capacitor and varistor production line and greatly improving space utilization.

[0022] like Figure 1 , 2 As shown, the cam disk 5 is provided with a circumferentially protruding edge 52 and a central cam portion 53, and a cam ring groove 51 is formed between the circumferentially protruding edge 52 and the central cam portion 53. In this way, the circumferentially protruding edge 52 and the central cam portion 53 form a cam ring groove 51 constraint. The groove wall of the cam ring groove 51 constrains the movement trajectory of the sliding wheel 61, so as to precisely constrain the swing amplitude of the horizontal longitudinal push rod 6, thereby driving the transverse connecting rod 4 and the cutting mechanism 3 to perform a very precise cutting action.

[0023] like Figure 2As shown, the intermediate cam portion 53 is composed of a circular main body portion 531 and an outwardly protruding portion 532 disposed on one side of the circular main body portion 531, and the outer surfaces of the circular main body portion 531 and the outwardly protruding portion 532 are connected as one unit with an arc transition; an arc-shaped concave wall portion 521 is provided on the inner side wall of the circumferential outwardly protruding edge 52 corresponding to the position of the outwardly protruding portion 532. In this way, during operation, the sliding wheel 61 oscillates periodically and intermittently along the outer circumferential surface of the intermediate cam portion 53, matching the forward movement speed of the material belt, and precisely cutting the tail end of the pin.

[0024] like Figure 3 As shown, in order to enhance the absorption of vibration by the sliding wheel 61 and further reduce the vibration energy of the horizontal longitudinal push rod 6, the outer side of the sliding wheel 61 is covered with a shock-absorbing rubber wheel ring 611.

[0025] like Figure 1 , 3 As shown in Figure 4, the vertical hinged bracket 7 is provided with a horizontal through hole 72 for the horizontal longitudinal push rod 6 to pass through, and a pin 71 is also provided on the vertical hinged bracket 7, which vertically passes through the horizontal through hole 72 from its top. Correspondingly, the middle part of the horizontal longitudinal push rod 6 is provided with a pin hole 62 for the pin 71 to pass through. In this way, the horizontal longitudinal push rod 6 swings back and forth with the pin 71 as the center, driven by the cam disk 5. At the same time, the horizontal through hole 72 can also constrain the horizontal longitudinal push rod 6, enhance its stability during swing, and prevent it from deviating.

[0026] like Figure 1 , 5 As shown, in this utility model, the feed strip moves vertically along the feeding mechanism 2 to the cutting mechanism 3. Since the main body of the ceramic capacitor and varistor is relatively heavy, to prevent the feed strip from tipping over and affecting the cutting accuracy, the feeding mechanism 2 includes a fixed clamping base 21, a movable elastic clamping assembly 22, and a mounting bracket 23. The mounting bracket 23 is fixedly assembled with the fixed clamping base 21, and a gap 24 is formed between the mounting bracket 23 and the fixed clamping base 21 to accommodate and accommodate the movable elastic clamping assembly 22. The movable elastic clamping assembly 22 is arranged in the gap 24 and is movably connected to the mounting bracket 23. A groove 25 for the feed strip to pass through is also formed between the movable elastic clamping assembly 22 and the fixed clamping base 21. In this way, the material strip is clamped in the slot 25. The movable elastic clamping component 22 can press the material strip down to prevent it from tipping over, ensuring that the material strip can pass through the cutting mechanism 3 vertically. The cutting mechanism 3 accurately cuts the tail end of the pin. At the same time, since the movable elastic clamping component 22 is elastically pressed on the material strip, it will not crush the material strip. Therefore, while clamping the material strip, it can also make the material strip move forward smoothly, ensuring smooth production.

[0027] like Figure 5 , 6As shown, the movable elastic clamping assembly 22 consists of a clamping rod 221, pins 222 disposed at both ends of the clamping rod 221, and a return spring 223 fitted onto the pins 222. The movable elastic clamping assembly 22 passes through the pins 222 into the rod holes 231 provided on the mounting bracket 23, and under the action of the return spring 223, forces the clamping rod 221 to move towards the fixed clamping base 21. Thus, under the elastic force of the return spring 223, the clamping rod 221 can always firmly press the material strip against it, preventing it from tipping over.

[0028] Preferably, the mounting bracket 23 is an L-shaped structure consisting of a horizontal rod 232 and a vertical rod 233. The horizontal rod 232 is fixed to the bottom surface of the fixed clamping base 21, and the movable elastic clamping assembly 22 is movably connected to the vertical rod 233. The rod hole 231 is set on the vertical rod 233. In this way, the whole structure is very compact, and the installation and fixing of the mounting bracket 23 does not require additional space on the mounting platform 1, thus occupying very little space.

[0029] like Figure 1 , 7 As shown in Figure 8, there are two mounting brackets 23. The cutting mechanism 3 includes a fixed blade 31, a movable blade 32, a slider 33, and a slide rail 34. The fixed blade 31 is installed in a blade holder 211 at the bottom of the fixed clamping base 21. The blade holder 211 is located between the two mounting brackets 23. The movable blade 32 is disposed in the cavity 230 between the mounting brackets 23 and is fixedly connected to the slider 33. The slider 33 is connected to the transverse transmission rod 4. The slider 33 is assembled with the slide rail 34. In this way, the blades of the fixed blade 31 and the movable blade 32 are arranged opposite each other. When the ceramic capacitor and the varistor move between the two mounting brackets 23, under the elastic force of the return spring 223, the clamping rod 221 presses and positions the lead of the strip, and the movable blade 32 moves forward to cut off the tail end of the lead.

[0030] like Figure 1 As shown, it also includes a support base 10, on which the fixed clamping base 21 is mounted; a horizontally arranged slide rail bracket 20 is also mounted on the top of the fixed clamping base 21, and the slide rail 34 is mounted on the slide rail bracket 20. Preferably, the fixed clamping base 21 is mounted on the upper end of the support base 10, so that the surface of the mounting platform 1 has ample space to place the receiving tray, collect the leftover material from the cut pin ends, and prevent the functional mechanisms from being touched when the receiving tray is moved, thus ensuring smooth and stable production.

[0031] Because the cutting tip wears out quickly and needs frequent replacement, it can easily cause the screw hole at the cutting tip fixing point to slip. Therefore, as a preferred option, such as... Figure 1 , 8As shown, the slider 33 is composed of an upper slider 331 and a lower cutter holder 332 arranged in layers. The movable cutter 32 is fixed to the front end of the cutter holder 331, and the rear end of the cutter holder 331 is connected to the transverse transmission rod 4. In this way, when the screw hole at the cutter head fixing point slips and cannot firmly lock the cutter head, only a new cutter holder 331 needs to be replaced, instead of replacing the entire slider 33, thereby reducing the operating cost of the equipment.

[0032] During production, the upper slider 331 slides back and forth on the slide rail 34 at a high frequency, resulting in significant wear on both the upper slider 331 and the slide rail 34. If either of them becomes worn or deformed, it will directly affect the cutting accuracy of the pin tail, thus requiring regular inspection and replacement. Preferably, the slide rail 34 consists of an upper fixing block 341 and a lower sliding rail block 342. The upper fixing block 341 is fixed to the bottom surface of the slide rail bracket 20, and the lower sliding rail block 342 is fixed together with the upper fixing block 341. In this way, after long-term use, if the upper slider 331 and the lower sliding rail block 342 deform or wear, they can be replaced separately, thereby helping to reduce the operating cost of the equipment.

Claims

1. A tail cutting structure applied to the production of ceramic capacitors and varistors, comprising a feeding mechanism (2), a cutter mechanism (3), and a transverse transmission rod (4) connected with the cutter mechanism (3); characterized in that: Also included A cam disc (5) arranged side by side with the cutter mechanism (3) and horizontally circumferentially rotating; A vertical hinged support (7) arranged between the cutter mechanism (3) and the cam disc (5); A horizontal longitudinal push rod (6) crossing the vertical hinged support (7) and hinged with the vertical hinged support (7), one end of the horizontal longitudinal push rod (6) being hingedly connected with the transverse transmission rod (4), the other end of the horizontal longitudinal push rod (6) being provided with a horizontal circumferential sliding wheel (61) embedded in a cam ring groove (51) provided in the cam disc (5) and horizontally circumferentially sliding along the cam ring groove (51).

2. The tail cutting structure for ceramic capacitor and varistor production according to claim 1, characterized in that: The cam disc (5) is respectively provided with a circumferential outer convex edge (52) and an intermediate cam portion (53), and the cam ring groove (51) is formed between the circumferential outer convex edge (52) and the intermediate cam portion (53).

3. The tail cutting structure for ceramic capacitor and varistor production according to claim 2, characterized in that: The intermediate cam portion (53) is composed of a circular main body portion (531) and an outer convex portion (532) provided on one side of the circular main body portion (531), and the outer side surfaces of the circular main body portion (531) and the outer convex portion (532) are integrally connected in a circular arc transition; the inner side wall of the circumferential outer convex edge (52) is provided with an arc-shaped concave wall portion (521) corresponding to the position of the outer convex portion (532).

4. The tail cutting structure for ceramic capacitor and varistor production according to claim 1, wherein: The outer side of the sliding wheel (61) is covered with a shock-absorbing rubber ring (611).

5. The tail cutting structure for ceramic capacitor and varistor production according to claim 1, wherein: The vertical hinged support (7) is provided with a horizontal through hole (72) for the horizontal longitudinal push rod (6) to pass through, and a pin shaft (71) vertically penetrating the horizontal through hole (72) from the top of the vertical hinged support (7), and the middle part of the horizontal longitudinal push rod (6) is correspondingly provided with a pin hole (62) for the pin shaft (71) to penetrate.

6. The tail cutting structure for ceramic capacitor and varistor production according to claim 1, wherein: The feeding mechanism (2) comprises a fixed clamping base (21), a movable elastic clamping assembly (22), and a mounting bracket (23); the mounting bracket (23) is fixedly assembled with the fixed clamping base (21), and a gap (24) is formed between the mounting bracket (23) and the fixed clamping base (21) for the movable elastic clamping assembly (22) to move and be accommodated, the movable elastic clamping assembly (22) is arranged in the gap (24) and movably connected with the mounting bracket (23); a slot (25) is further formed between the movable elastic clamping assembly (22) and the fixed clamping base (21) for the material belt to pass through.

7. The tail cutting structure for ceramic capacitor and varistor production according to claim 6, characterized in that: The movable elastic clamping assembly (22) is composed of a clamping rod (221), pin rods (222) provided at both ends of the clamping rod (221), and a reset spring (223) sleeved on the pin rods (222), the movable elastic clamping assembly (22) is sleeved on the rod hole (231) provided on the mounting bracket (23) through the pin rods (222), and under the action of the reset spring (223), the clamping rod (221) is forced to move towards the fixed clamping base (21).

8. The tail cutting structure for ceramic capacitor and varistor production according to claim 6, wherein: The cutter mechanism (3) comprises a fixed cutter (31), a movable cutter (32), a sliding block (33) and a sliding rail (34), the fixed cutter (31) is installed in a cutter seat (211) arranged at the bottom of a fixed clamping base (21); the movable cutter (32) is arranged in a cavity (230) arranged between the mounting bracket (23) and the mounting bracket (23) and is fixedly connected with the sliding block (33), the sliding block (33) is connected with a transverse transmission rod (4); the sliding block (33) is assembled with the sliding rail (34).

9. The tail cutting structure for ceramic capacitor and varistor production according to claim 8, characterized in that: The support seat (10) is further provided, the fixed clamping base (21) is installed on the support seat (10); a horizontal sliding rail support (20) is further installed on the top of the fixed clamping base (21), and the sliding rail (34) is installed on the sliding rail support (20).

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