Winding machine for winding SMD carrier tape

Abstract

The utility model discloses a winding machine for winding an SMD (Surface Mount Device) carrier tape. The winding machine is improved aiming at the three problems of large tension fluctuation, low mechanical limiting safety and poor winding positioning accuracy in the prior art. Comprising a vertical feeding channel formed by a main body frame, a feeding wheel and a guide wheel; the tension adjusting device is in linkage with a supporting rod to swing through a fixing rod assembly, an encoder detects the rotation angle in real time and feeds back a control motor to form closed-loop adjustment, and the problem of response lag of traditional passive tension control is solved. The second fixing rod is arranged below the supporting rod, and collision damage is reduced through 5-30 mm spacing limiting and a composite buffering pad. The limiting structure of the rail clamping device restrains the swing angle of the clamping rod through the rolling wheel and the baffle, and the rolling positioning precision is improved in cooperation with anti-skid lines of the carrier tape positioning clamping piece. According to the scheme, dynamic electronic feedback and mechanical protection design are combined, and the technical effects that tension is stable, the service life of parts is long, and the winding alignment degree is high are achieved.

Description

Technical Field

[0001] This utility model relates to the field of electronic component manufacturing equipment technology, and in particular to a winding machine for winding SMD carrier tape. Background Technology

[0002] In the SMD carrier tape production process, the winding stage requires extremely high stability of the carrier tape tension. Traditional winding equipment generally suffers from the following defects:

[0003] 1. Insufficient tension control: Existing mechanical tension adjustment devices (such as springs or counterweights) rely on passive response and cannot capture dynamic tension changes in real time, resulting in the carrier belt being wound too tightly or too loosely, causing problems such as deformation and breakage.

[0004] 2. Weak limit protection: Mechanical limit components are mostly rigid structures. Sudden increase in tension can easily cause the strut to swing excessively and collide hard with the frame, resulting in component deformation or even motor burnout;

[0005] 3. Poor positioning accuracy: The limiting structure of the rail clamping device cannot accurately constrain the swing amplitude, which can easily cause the carrier tape to deviate or loosen during winding. Utility Model Content

[0006] In view of the above situation, it is necessary to provide a winding machine for winding SMD carrier tape that solves at least one of the above problems, comprising:

[0007] Main framework (1);

[0008] The feed wheel (2) and guide wheel (3) are mounted on the main frame (1), with the guide wheel (3) located directly above the feed wheel (2);

[0009] Tension adjustment device (4), comprising:

[0010] The fixed rod assembly (41) is horizontally mounted on the main frame via bearings, and one end of it is fixedly connected to the output shaft of the motor (45);

[0011] The strut (43) has a first end fixed to the axis of the fixed rod assembly (41) perpendicular to the first end, and a second end provided with a roller (44) for guiding the carrier belt.

[0012] The encoder (46) detects the rotation angle of the fixed rod assembly (41) in real time;

[0013] The second fixed rod (42) is horizontally fixed on the main frame, located below the swing path of the support rod (43) and parallel to the fixed rod assembly (41), and is used to limit the downward swing amplitude of the support rod;

[0014] The winding device (5) includes a winding roller (51) mounted on the main frame via bearings and a winding reel (52) fixed thereon;

[0015] Rail clamping device (6), comprising:

[0016] The clamp (61) is mounted to the main frame via the hinge shaft (63);

[0017] A carrier belt positioning card (62) is provided at the top of the card bar, and the surface of the carrier belt positioning card (62) that contacts the reel (52) is provided with anti-slip texture (621);

[0018] The limiting structure (64) constrains the swing angle of the locking rod (61).

[0019] Preferably, the vertical distance between the upper surface of the second fixed rod (42) and the bottom surface of the swinging support rod (43) is 15-30mm. When the support rod swings down and contacts the second fixed rod, the encoder (46) triggers the motor (45) to drive the fixed rod assembly (41) to rotate in the opposite direction with a response period of 0.5-3 seconds.

[0020] Preferably, the encoder (46) sets the strut swing angle threshold to ±5° to ±12°. When the strut swing angle exceeds the threshold, the motor (45) performs closed-loop feedback adjustment according to the preset speed curve.

[0021] Preferably, the upper surface of the second fixing rod (42) is provided with a multi-layer composite buffer pad (421), including a metal substrate welded to the bottom and a polyurethane layer bonded to the surface, wherein the thickness of the polyurethane layer is 3-6mm.

[0022] Preferably, the strut (43) and the fixed rod assembly (41) are connected by a radial key (411), the keyway depth is 1 / 7-1 / 4 of the rod diameter, and the key width is 1 / 10-1 / 6 of the rod diameter.

[0023] Preferably, the swing angle of the strut (43) is limited to -8° to -18° by the second fixed rod (42), wherein the negative angle is defined as the strut swinging downward from the horizontal reference position.

[0024] Preferably, the limiting structure (64) includes limiting rollers (641) and baffles (642) symmetrically arranged on both sides of the clamp rod. The sliding groove width of the limiting rollers (641) is equal to the thickness of the clamp rod ±0.8mm, and the distance between the baffles and the clamp rod is 2-8mm. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of the winding machine according to an embodiment of the present utility model.

[0026] Figure 2 This is a structural schematic diagram of the tension adjustment device according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the connection between the support rod and the fixed rod assembly according to an embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the rail clamping device according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the winding device according to an embodiment of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the winding machine of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0031] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Please see Figure 1 as well as Figure 5A winding machine according to an embodiment of the present invention includes a main frame (1), a feed roller (2), a guide roller (3), a tension adjustment device (4), a winding device (5), and a rail clamping device (6). Specifically, the guide roller (3) is located directly above the feed roller (2), forming an efficient material transmission path through a vertical layout; the tension adjustment device (4) is linked with the encoder (46) through a fixed rod assembly (41), a support rod (43), and a second fixed rod (42) to dynamically control the tension of the carrier belt; the rail clamping device (6) precisely constrains the swing angle of the clamping rod (61) through a limiting structure (64).

[0034] The vertical distance between the guide wheel (3) and the feed wheel (2) forms a stable material channel to prevent the carrier belt from shifting. In the tension adjustment device (4), the fixed rod assembly (41) rotates horizontally through the bearing, the support rod (43) is fixed to the fixed rod assembly, and the roller (44) at its end guides the carrier belt. When the material tension changes, the support rod swings around the fixed rod, the encoder (46) detects the rotation angle in real time and feeds it back to the motor (45), and forms a closed-loop tension control through torque adjustment. The second fixed rod (42) is set below the swing path of the support rod, and its excessive swing is limited by physical obstruction. The winding device (5)'s winding reel (52) takes in the material by rotating the winding roller (51), and the carrier belt positioning card (62) of the rail clamping device (6) prevents the carrier belt from slipping during the winding process by contacting the surface of the winding reel with anti-slip texture (621). This structure improves the winding stability and tension control accuracy through a composite adjustment method of mechanical limit and electronic feedback.

[0035] Please see Figure 1 as well as Figure 5 In another embodiment, the vertical distance between the upper surface of the second fixed rod (42) and the bottom surface of the support rod (43) is 15-30mm. When the support rod swings down and contacts the second fixed rod, the encoder (46) triggers the motor (45) to drive the fixed rod assembly (41) to reverse and reset with a preset response period (0.5-3 seconds).

[0036] The spacing design prevents the strut from swinging down excessively through physical limits. When the carrier belt tension changes abruptly, causing the strut to swing down to the second fixed rod (42), the motor (45) receives the encoder feedback signal and drives the fixed rod assembly (41) to reverse, quickly eliminating the risk of mechanical collision. The response cycle of 0.5-3 seconds takes into account both emergency stop protection and energy consumption optimization. For example, completing the reversal action within a 1-second cycle can effectively reduce the carrier belt breakage rate by about 60% (actual measurement data).

[0037] Please see Figure 1 as well as Figure 5In another embodiment, the encoder (46) sets the strut swing angle threshold to ±5° to ±12°, and when the encoder detects that the angle exceeds the limit, it controls the motor (45) to adjust braking or acceleration according to the speed curve.

[0038] If the angle threshold is set to +10° / -10°, when the support rod swings upward to +12° (such as in a material jamming scenario) or downward to -10.5° due to a sudden increase in tension, the encoder triggers different speed curves (such as motor deceleration and braking when exceeding the upper limit, and reverse acceleration when exceeding the lower limit). Through angle closed-loop feedback, the malfunction of single threshold control is avoided, and the adjustment flexibility and reliability are improved.

[0039] Please see Figure 1 as well as Figure 5 In another embodiment, the upper surface of the second fixing rod (42) is provided with a composite buffer pad (421), which includes a bottom metal substrate and a surface polyurethane layer with a thickness of 3-6 mm.

[0040] In the layered buffer pad, the metal substrate is fixed to the second fixing rod (42) by welding, and the surface polyurethane layer absorbs the impact energy of the support rod. For example, a 5mm thick polyurethane layer (Shore hardness 80A) can reduce the rigid impact force by about 70%, significantly extending the service life of the support rod and the second fixing rod. This structure also avoids the defects of pure metal limit rods being prone to wear and having poor buffering performance.

[0041] Please see Figure 1 as well as Figure 5 In another embodiment, the strut (43) and the fixed rod assembly (41) are connected by a radial key (411), the keyway depth being 1 / 7-1 / 4 of the rod diameter and the key width being 1 / 10-1 / 6 of the rod diameter.

[0042] For the fixed rod assembly with a rod diameter of 20mm, a keyway with a depth of 3mm (1 / 6.7) and a key width of 3mm (1 / 6.67) is used. This can withstand the torque load during the winding operation (test support torque ≥50N·m) and facilitate quick replacement of the support rod (43) by disassembling the radial key (411). This connection method takes into account both structural strength and maintenance convenience.

[0043] Please see Figure 1 as well as Figure 5 In another embodiment, the swing angle of the strut (43) is limited to -8° to -18° by the second fixed rod (42), and the negative angle is defined as the strut swinging down from the horizontal reference position.

[0044] With the horizontal reference position at 0°, when the support rod swings down to -15°, its bottom surface contacts the second fixed rod and is limited. The encoder controls the motor to rotate in the opposite direction until it returns to the safe range of -4°. This angle range limitation avoids the problem of carrier belt creases caused by excessive swing amplitude in traditional equipment.

[0045] Please see Figure 1 as well as Figure 5 In another embodiment, the limiting structure (64) includes a limiting roller (641) and a baffle (642), the width of the roller sliding groove is equal to the thickness of the clamping rod ±0.8mm, and the distance between the baffle and the clamping rod is 2-8mm.

[0046] When the lever (61) is in a free state, the sliding groove width of the limiting rollers (641) on both sides (e.g., when the lever thickness is 15mm, the sliding groove width is 15.8mm) allows for a small tolerance range of activity space; when the baffle (642) is 5mm away from the lever, it can constrain the lever swing amplitude to within ±4.5°, preventing the rail clamping device from failing due to external impact.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A winding machine for winding SMD carrier tape, characterized in that, include: Main framework (1); The feed wheel (2) and guide wheel (3) are mounted on the main frame (1), with the guide wheel (3) located directly above the feed wheel (2); Tension adjustment device (4), comprising: The fixed rod assembly (41) is horizontally mounted on the main frame via bearings, and one end of it is fixedly connected to the output shaft of the motor (45); The strut (43) has a first end fixed to the axis of the fixed rod assembly (41) perpendicular to the first end, and a second end provided with a roller (44) for guiding the carrier belt. The encoder (46) detects the rotation angle of the fixed rod assembly (41) in real time; The second fixed rod (42) is horizontally fixed on the main frame, located below the swing path of the support rod (43) and parallel to the fixed rod assembly (41), and is used to limit the downward swing amplitude of the support rod; The winding device (5) includes a winding roller (51) mounted on the main frame via bearings and a winding reel (52) fixed thereon; Rail clamping device (6), comprising: The clamp (61) is mounted to the main frame via the hinge shaft (63); A carrier belt positioning card (62) is provided at the top of the card bar, and the surface of the carrier belt positioning card (62) that contacts the reel (52) is provided with anti-slip texture (621); The limiting structure (64) constrains the swing angle of the locking rod (61).

2. The winding machine according to claim 1, characterized in that: The vertical distance between the upper surface of the second fixed rod (42) and the bottom surface of the swinging support rod (43) is 15-30mm. When the support rod swings down and contacts the second fixed rod, the encoder (46) triggers the motor (45) to drive the fixed rod assembly (41) to rotate in the opposite direction with a response period of 0.5-3 seconds.

3. The winding machine according to claim 1, characterized in that: The encoder (46) sets the strut swing angle threshold to ±5° to ±12°. When the strut swing angle exceeds the threshold, the motor (45) performs closed-loop feedback adjustment according to the preset speed curve.

4. The winding machine according to claim 1, characterized in that: The upper surface of the second fixing rod (42) is provided with a multi-layer composite buffer pad (421), including a metal substrate welded to the bottom and a polyurethane layer bonded to the surface, wherein the thickness of the polyurethane layer is 3-6mm.

5. The winding machine according to claim 1, characterized in that: The strut (43) and the fixed rod assembly (41) are connected by a radial key (411), with the keyway depth being 1 / 7 to 1 / 4 of the rod diameter and the key width being 1 / 10 to 1 / 6 of the rod diameter.

6. The winding machine according to claim 1, characterized in that: The swing angle of the strut (43) is limited to -8° to -18° by the second fixed rod (42), where the negative angle is defined as the strut swinging downward from the horizontal reference position.

7. The winding machine according to claim 1, characterized in that: The limiting structure (64) includes limiting rollers (641) and baffles (642) symmetrically arranged on both sides of the clamp rod. The sliding groove width of the limiting rollers (641) is equal to the thickness of the clamp rod ±0.8mm, and the distance between the baffles and the clamp rod is 2-8mm.

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