Steel nail punch synchronous pushing-out mechanism

Abstract

A kind of steel nail punch synchronous push-out mechanism belongs to metal punch forming equipment technical field;Through the fixed roller and sliding roller combination of spring pressurization, cooperate with the steel wire embedded groove on feeding sleeve, form uniform, reliable clamping to steel wire, effectively prevent feeding skid.Added synchronous gear ring further forcedly guaranteed the absolute synchronization of double roller rotation, ensure the consistency of the length of multiple steel wire feeding;Power part uses the combination mechanism of "gear and rack-ratchet", the pressing of punch is converted into the oscillation of output shaft in positive and negative direction by rack, then the effective one-way rotation movement is screened out by ratchet mechanism to drive feeding roller, compact structure, reliable action, easy to control feeding pitch;Multiple steel wire synchronous feeding and synchronous punch forming can be realized, and production efficiency is much higher than single nail equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of metal stamping and forming equipment, specifically to a steel nail stamping synchronous ejection mechanism. Background Technology

[0002] In the mass production of steel nails, progressive dies are typically used for continuous stamping on a press. This process requires the continuous, stable, and precise feeding of coiled wire or pre-straightened straight steel wire into the die. Existing feeding mechanisms often use independent power sources (such as servo motors or cylinders) to drive the feeding rollers, achieving synchronization through coordinated control with the main motion of the press. This approach suffers from problems such as complex control systems, high costs, and susceptibility to synchronization issues under high-speed stamping. Furthermore, for steel nail stamping requiring significant feed force, slippage can easily occur between the feeding rollers and the steel wire, affecting feeding accuracy. Additionally, adjusting the clamping gap of the feeding rollers for steel wires of different diameters is inconvenient, impacting changeover efficiency. Therefore, there is an urgent need for a steel nail feeding and ejection mechanism that is simple in structure, reliably synchronized, has adjustable clamping force, and directly obtains power from the main motion of the press. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the prior art and provide a steel nail punching and synchronous ejection mechanism.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a steel nail punching synchronous ejection mechanism, including a power unit and a feeding unit, the feeding unit is located in front of the power unit, the power unit includes a rack and an output shaft, a gear is connected to the output shaft, the gear meshes with the rack, and a ratchet is provided between the output shaft and the feeding unit.

[0005] Preferably, the feeding part includes an installation frame, in which a fixed feeding roller and a sliding feeding roller are provided. Both the fixed feeding roller and the sliding feeding roller include a rotating shaft and a feeding sleeve fixedly sleeved on the rotating shaft. The feeding sleeve is provided with multiple parallel wire embedding grooves.

[0006] Preferably, the rotating shaft of the fixed feeding roller is rotatably connected to the mounting frame, and each end of the rotating shaft of the sliding feeding roller is provided with a slider, and the sliding feeding roller is slidably connected to the mounting frame through the two sliders.

[0007] Preferably, the ratchet is connected between the output shaft and the rotating shaft in the fixed feeding roller. The counterclockwise rotation of the output shaft drives the fixed feeding roller to rotate together, while the clockwise rotation of the output shaft prevents the ratchet from driving the fixed feeding roller to rotate.

[0008] Preferably, the sliding feed roller is further provided with a lower pressure frame on the rotating shaft, and a spring is provided between the lower pressure frame and the frame to press the sliding feed roller down onto the fixed feed roller.

[0009] Preferably, one side of each of the two feeding sleeves in the fixed feeding roller and the sliding feeding roller is provided with a synchronous gear ring that can mesh with each other.

[0010] The beneficial effects of this utility model are:

[0011] Precise and stable feeding: The combination of spring-loaded fixed and sliding rollers, along with the wire embedding groove on the feeding sleeve, forms a uniform and reliable clamping of the wire, effectively preventing slippage. The added synchronous gear ring further ensures the absolute synchronization of the rotation of the two rollers, ensuring the consistency of the feeding length of multiple wires.

[0012] The intermittent feeding mechanism is ingenious: the power unit adopts a combination mechanism of "gear and rack-ratchet", which converts the downward pressure of the punch into the forward and reverse swing of the output shaft through the rack, and then the ratchet mechanism selects the effective unidirectional rotational motion to drive the feeding roller. The structure is compact, the operation is reliable, and the feeding step distance is easy to control.

[0013] High efficiency: It can achieve synchronous feeding and stamping of multiple steel wires, and its production efficiency is much higher than that of single-nail equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the feeding part of this utility model.

[0016] In the diagram: 1. Power unit; 11. Rack; 12. Output shaft; 13. Gear; 2. Feeding unit; 21. Mounting frame; 3. Ratchet mechanism; 4. Fixed feeding roller; 41. Rotating shaft; 42. Feeding sleeve; 421. Steel wire embedding groove; 43. Synchronous gear ring; 5. Sliding feeding roller; 51. Slider; 6. Lower pressure frame; 7. Spring. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] Example: A steel nail punching and synchronous ejection mechanism, such as Figures 1-2 As shown, the core of the power unit 1 is an arc-shaped rack 11, the back of which is connected to the press slide (not shown in the figure). The output shaft 12 is supported on the frame by a bearing seat, and the gear 13 on it meshes with the rack 11. When the press slide moves up and down, the arc-shaped rack 11 moves up and down accordingly, driving the gear 13 and the output shaft 12 to reciprocate.

[0019] The feeding unit 2 is fixed to the front of the power unit 1 by the mounting frame 21. The rotating shaft 41 of the fixed feeding roller 4 passes through the two side plates of the mounting frame 21 and is supported by bearings. The sliding feeding roller 5 is located directly above the fixed feeding roller 4, and the sliders 54 at both ends of its rotating shaft 51 are embedded in the mounting frame 21, allowing it to slide up and down. The feeding sleeves 42 of both feeding rollers are machined with V-shaped or semi-circular wire embedding grooves 421 for clamping the wire.

[0020] The ratchet mechanism 3 is directly connected in series between the output shaft 12 and the rotating shaft 41 of the fixed feeding roller 4. In this embodiment, the inner ring of the ratchet is keyed to the rotating shaft 41 of the fixed feeding roller 4, and the outer ring is connected to the output shaft 12 through a coupling. The mechanism is adjusted to ensure that when the press slide is punching downwards, the output shaft 12 rotates clockwise (viewed from the gear side). At this time, the ratchet slips, and power cannot be transmitted.

[0021] A U-shaped lower pressure frame 6 is provided on the rotating shaft 51 of the sliding feed roller 5. A compression spring 7 is vertically installed between the lower pressure frame 6 and the top of the mounting frame 21 to provide adjustable and flexible downward pressure for the sliding feed roller 5. The pressure can be changed by replacing the spring or adjusting the spring pre-compression to accommodate steel wires 8 of different hardness or diameter.

[0022] The key improvement lies in the installation of identical end-face synchronous gear rings 43 on the left side of the feeding sleeve 42 of the fixed feeding roller 4 and the left side of the feeding sleeve 52 of the sliding feeding roller 5. When the sliding feeding roller 5 is pressed down, the two gear rings mesh precisely. In this way, even with manufacturing errors or wear, the two feeding sleeves can always maintain absolute synchronization of rotation speed, eliminating scratches on the wire surface or errors in feeding length caused by speed differences.

[0023] The work process is as follows:

[0024] The press slide moves the rack 11 upward, driving the gear 13 and output shaft 12 to rotate counterclockwise.

[0025] The ratchet mechanism 3 engages, transmitting power to the fixed feed roller 4, causing it to rotate counterclockwise (viewed from the operating side). Under the pressure of the spring 7, the feeding sleeve 52 of the sliding feed roller 5 tightly presses against the steel wire 8, and passively rotates in the opposite direction (counterclockwise) synchronously with the fixed feed roller 4 through the engagement of the synchronous gear ring 43. The two rollers work together to push the clamped steel wire 8 forward (towards the mold) by a set length (the feeding length is determined by the gear and rack transmission ratio and the diameter of the feeding sleeve).

[0026] The slider drives the rack 11 downwards, and the output shaft 12 rotates clockwise. At this time, the ratchet mechanism 3 slips and spins freely, and the fixed feed roller 4 and the sliding feed roller 5 quickly stop rotating under inertia and frictional resistance, remaining stationary. The steel wire 8 stops advancing.

[0027] Adjustment and Replacement: When replacing steel wire 8 with steel wire of different diameters, first release the pressure of spring 7 (e.g., by lifting the lower pressure frame 6), raise the sliding feed roller 5 along the guide groove 211 to increase the roller gap, and insert the new steel wire. Then lower the sliding feed roller 5, and the steel wire will be automatically pressed under the spring force. At the same time, a feeding sleeve 42 with the corresponding steel wire embedding groove 421 specification needs to be matched and replaced, and it should be ensured that the synchronous gear rings 43 and 53 on its side can mesh correctly.

[0028] Finally, it should be noted that the above embodiments are merely representative examples of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A steel nail punching synchronous ejection mechanism, comprising a power unit (1) and a feeding unit (2), characterized in that: The feeding part (2) is located on the front side of the power part (1). The power part (1) includes a rack (11) and an output shaft (12). A gear (13) is connected to the output shaft (12). The gear (13) meshes with the rack (11). A ratchet (3) is provided between the output shaft (12) and the feeding part (2).

2. The steel nail punching synchronous ejection mechanism according to claim 1, characterized in that: The feeding section (2) includes an installation frame (21), in which a fixed feeding roller (4) and a sliding feeding roller (5) are provided. Both the fixed feeding roller (4) and the sliding feeding roller (5) include a rotating shaft (41) and a feeding sleeve (42) fixedly sleeved on the rotating shaft (41). The feeding sleeve (42) is provided with multiple parallel wire embedding grooves (421).

3. The steel nail punching synchronous ejection mechanism according to claim 2, characterized in that: The rotating shaft (41) of the fixed feeding roller (4) is rotatably connected to the mounting frame (21). The rotating shaft (41) of the sliding feeding roller (5) has a slider (51) at each end. The sliding feeding roller (5) is slidably connected to the mounting frame (21) through the two sliders (51).

4. The steel nail punching synchronous ejection mechanism according to claim 3, characterized in that: The ratchet (3) is connected between the output shaft (12) and the rotating shaft (41) in the fixed feeding roller (4). The counterclockwise rotation of the output shaft (12) drives the fixed feeding roller (4) to rotate together. When the output shaft (12) rotates clockwise, the ratchet (3) cannot drive the fixed feeding roller (4) to rotate.

5. The steel nail punching synchronous ejection mechanism according to claim 3, characterized in that: A lower pressure frame (6) is also provided on the rotating shaft (41) of the sliding feed roller (5), and a spring (7) is provided between the lower pressure frame (6) and the frame to press the sliding feed roller (5) down onto the fixed feed roller (4).

6. The steel nail punching synchronous ejection mechanism according to claim 3, characterized in that: One side of the two feeding sleeves (42) in the fixed feeding roller (4) and the sliding feeding roller (5) is provided with a synchronous gear ring (43) that can mesh with each other.

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