Wire feeding and guiding mechanism for threading wires through lower concave hole

Abstract

The wire feeding and guiding mechanism comprises a wire feeding mechanism, a fixing seat and a driving mechanism, the fixing seat is arranged on the wire feeding mechanism, a wire guiding lifting channel is formed in the fixing seat, a telescopic wire penetrating guide pipe is arranged in the wire guiding lifting channel, and the driving mechanism is arranged on the telescopic wire penetrating guide pipe. The telescopic wire penetrating guide pipe can stretch out of or retract into the guide wire lifting channel under the action of the driving mechanism, the telescopic wire penetrating guide pipe stretches out of the guide wire lifting channel and can penetrate into the lower concave hole of the workpiece, and the electrode wire penetrates through the telescopic wire penetrating guide pipe through a machining hole site of the workpiece. The telescopic pipe can retract into the channel after threading is completed, the positioning precision is improved, and the exposed part is prevented from being affected by the external environment. The fixed penetrating wire can better stabilize the wire penetrating guide pipe, deviation caused by falling of waste materials is prevented, and the cutting precision is improved; the telescopic threading guide pipe retracts into the channel to improve the positioning precision after threading is completed, so that the telescopic threading guide pipe can be made thinner, threading can be conducted at the narrow portion of the lower concave hole, deviation is not prone to occurring when waste materials fall off, and the cutting precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting equipment, in particular to a wire feeding and guiding mechanism for threading wires through a lower concave hole. Background Art

[0002] In the process of mechanical processing, especially in the cutting process, it is often necessary to feed the electrode wire into the recessed hole of the workpiece, complete the wire threading, and then perform the cutting process.

[0003] Chinese utility model patent application No.: CN220921170U proposes an automatically docking lower wire threading mechanism, including a fixed wire threading unit and a movable wire threading unit, the fixed wire threading unit having a first wire threading channel, the movable wire threading unit having a second wire threading channel, the movable wire threading unit having a first state and a second state that can be switched to each other, when the movable wire threading unit is in the first state, the bottom surface of the workpiece and the fixed wire threading unit and the movable wire threading unit have a preset distance, when the movable wire threading unit is switched to the second state, the first wire threading channel and the processing hole position of the workpiece are docked and connected through the second wire threading channel, and the wire-like electrode can pass through the processing hole position of the workpiece and then automatically pass through the second wire threading channel and the first wire threading channel in sequence to realize automatic wire threading.

[0004] However, the existing wire feeding mechanism, especially the wire feeding and guiding mechanism for wire threading, has some shortcomings in the process of use and still needs to be improved. The existing wire feeding and guiding mechanism often has problems such as complex structure, easily affected accuracy, easy to generate dirt and waste, poor stability, etc., especially after the wire threading is completed, the wire guide part is exposed to the outside, which is easily affected by the external environment, resulting in reduced accuracy, and at the same time, dirt and waste are generated, which are prone to jamming and even fall on the wire guiding mechanism, affecting the stability of wire feeding and cutting accuracy. Therefore, we make improvements on this and propose a wire feeding and guiding mechanism for wire threading with a concave hole. Utility Model Content

[0005] The purpose of the utility model is to address the problems raised by the existing background technology. In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions: a wire feeding and guiding mechanism for threading wire through a lower concave hole, comprising a wire feeding mechanism, a fixing seat, and a driving mechanism, wherein the fixing seat is on the wire feeding mechanism, and is characterized in that a wire guide lifting channel is provided in the fixing seat, and a telescopic wire threading duct is provided inside the wire guide lifting channel, and the telescopic wire threading duct can be extended or retracted into the wire guide lifting channel under the action of the driving mechanism.

[0006] As a preferred technical solution of the utility model, the telescopic wire-threading catheter extends out of the wire guide lifting channel and can be inserted into the concave hole under the workpiece, and the electrode wire passes through the telescopic wire-threading catheter through the processed hole of the workpiece.

[0007] As a preferred technical solution of the utility model, a catheter positioning bearing is provided at the upper end of the guide wire lifting channel.

[0008] As a preferred technical solution of the utility model, the upper end of the telescopic wire threading catheter is provided with a guide positioning hole for positioning the electrode wire.

[0009] As a preferred technical solution of the utility model, a lifting piston is arranged in the guide wire lifting channel inside the fixed seat, the lower end of the lifting piston is connected to the lifting air inlet pipe, and the upper end of the lifting piston is connected to the lowering air inlet pipe to form a driving mechanism.

[0010] As a preferred technical solution of the utility model, the lifting piston and the telescopic wire threading conduit are integrally formed.

[0011] As a preferred technical solution of the utility model, a piston sealing ring is sleeved on the outer surface of the lifting piston, and a return sealing ring is arranged on the upper part of the piston sealing ring.

[0012] As a preferred technical solution of the utility model, a first water inlet hole is horizontally arranged at the lower end of the guide wire lifting channel, a second water inlet hole is longitudinally arranged at the upper end of the guide wire lifting channel, and a water outlet is opened at the top of the guide wire lifting channel.

[0013] As a preferred technical solution of the utility model, the electrode wire is inserted into a telescopic wire-threading guide tube and rolls on the outer surfaces of the wire feeding wheel and the guide wheel.

[0014] As a preferred technical solution of the utility model, the outer diameter of the telescopic wire threading conduit is 1.5 mm to 4 mm, and the telescopic wire threading conduit is inserted into a narrower or wider hole position of the concave hole under the workpiece.

[0015] Compared with the prior art, the utility model has the following beneficial effects: In the scheme of the utility model: by setting a telescopic wire-threading catheter inside the wire-guide lifting channel, the telescopic wire-threading catheter can be extended or retracted into the wire-guide lifting channel by a driving mechanism directly driving the telescopic wire-threading catheter, without moving other parts, to achieve automatic wire threading and wire guiding, with a simple structure, reduced cost, and convenient operation; the telescopic wire-threading catheter can be retracted into the channel after threading is completed, thereby improving positioning accuracy and avoiding the exposed part from being affected by the external environment. By setting the telescopic wire-threading catheter to retract into the channel after threading is completed, the positioning accuracy is improved, the telescopic catheter can be made thinner, and the wire can be threaded in the narrower part of the lower concave hole, thereby improving the flexibility and applicability of threading. The fixing seat can better stabilize the wire-threading catheter, prevent waste material from falling and causing deviation, and improve cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure provided by the utility model;

[0017] Figure 2 A schematic diagram of the main structure provided by the utility model;

[0018] Figure 3 A schematic cross-sectional view of the structure provided by the utility model;

[0019] Figure 4 A partial cross-sectional structural schematic diagram provided by the utility model;

[0020] Figure 5 A schematic diagram of the three-dimensional structure provided by the utility model;

[0021] Figure 6 A schematic diagram of the electrode wire structure provided by the utility model;

[0022] Figure 7 A schematic diagram of the structure of the wire feeding wheel provided by the utility model;

[0023] Figure 8 The utility model provides Figure 7 Schematic diagram of the AA amplification structure.

[0024] Indicated in the figure:

[0025] 1. Wire feeding mechanism; 2. Fixed seat; 3. Wire guide lifting channel; 4. Guide tube positioning bearing; 5. Telescopic wire guide tube; 6. Guide positioning hole; 7. Lifting piston; 8. Piston sealing ring; 9. Return sealing ring; 10. Lowering air inlet hole; 11. Lifting air inlet hole; 12. First water inlet hole; 13. Electrode wire; 14. Wire feeding wheel; 15. Guide wheel; 16. Second water inlet hole; 17. Water outlet; 18. Conductive block; 19. Workpiece groove; 20. Workpiece lower recessed hole. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0027] Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model for which protection is sought, but merely represents some embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. It should be noted that the embodiments of the utility model and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] Example 1: Please refer to Figure 1-Figure 8 A wire feeding and guiding mechanism for threading a wire through a concave hole comprises a wire feeding mechanism 1, a fixed seat 2, and a driving mechanism. The fixed seat 2 is on the wire feeding mechanism 1 and is characterized in that a wire guide lifting channel 3 is provided in the fixed seat 2, and a telescopic wire threading catheter 5 is provided inside the wire guide lifting channel 3. The telescopic wire threading catheter 5 can be extended or retracted into the wire guide lifting channel 3 under the action of the driving mechanism.

[0029] The telescopic wire-threading conduit 5 extends out of the wire-guide lifting channel 3 and can be inserted into the concave hole 20 under the workpiece, and the electrode wire 13 passes through the telescopic wire-threading conduit 5 through the processed hole of the workpiece. A conduit positioning bearing 4 is provided at the upper end of the wire-guide lifting channel 3. A lifting piston 7 is provided in the wire-guide lifting channel 3 inside the fixed seat 2, and a piston sealing ring 8 is sleeved on the outer surface of the lifting piston 7, and a return sealing ring 9 is provided on the upper part of the piston sealing ring 8.

[0030] The lower end of the lifting piston 7 is connected to the pipeline of the lifting air inlet hole 11, and the upper end of the lifting piston 7 is connected to the pipeline of the lowering air inlet hole 10 to form a driving mechanism. The lower end of the guide wire lifting channel 3 is transversely provided with a first water inlet hole 12, the upper end of the guide wire lifting channel 3 is longitudinally provided with a second water inlet hole 16, and the top of the guide wire lifting channel 3 is provided with a water outlet 17.

[0031] The electrode wire 13 is inserted into the telescopic wire-threading conduit 5 and rolls on the outer surfaces of the wire-feeding wheel 14 and the guide wheel 15. Two wire-feeding wheels 14 are provided, and the electrode wire 13 passes through the middle part of the two wire-feeding wheels 14. The electrode wire 13 is connected to the power supply through the conductive block 18. The outer diameter of the telescopic wire-threading conduit 5 is 1.5 mm to 4 mm, and the telescopic wire-threading conduit 5 is inserted into the narrower or wider hole position of the concave hole 20 under the workpiece.

[0032] In this embodiment, the lifting piston 7 and the telescopic wire-threading guide tube 5 are integrally formed, and can be integrally formed by machining or integrally formed by fixed sleeve. By controlling the air intake of the lifting air inlet hole 11, the lifting piston 7 drives the telescopic wire-threading guide tube 5 to extend out of the wire lifting channel 3. The telescopic wire-threading guide tube 5 gradually penetrates into the lower concave hole of the workpiece, and the electrode wire 13 also enters the interior of the workpiece and penetrates into the telescopic wire-threading guide tube 5.

[0033] After the positioning operation and wire threading are completed, the lifting piston 7 is lowered by controlling the air intake hole 10 to allow air to enter, and the telescopic wire threading guide tube 5 can be completely retracted into the wire guide lifting channel 3 of the fixed seat 2. The electrode wire 13 is first sent out by the wire feeding wheel 14 and guided through the guide wheel 15. The guide wheel 15 guides to ensure that the electrode wire 13 can be stably fed. The lifting piston 7 drives the telescopic wire threading guide tube 5 to extend in the wire guide lifting channel 3 to guide and achieve wire threading.

[0034] The wire feeding mechanism guides the conveying path of the electrode wire 13 through the wire feeding wheel 14 and the guide wheel 15. The wire guide lifting channel 3 is the channel for the electrode wire to pass through. A catheter positioning bearing 4 is provided in the channel to ensure the stability and accuracy of the wire guide lifting channel 3 and the lifting piston 7. The catheter positioning bearing 4 is installed in the wire guide lifting channel and is also used to fix and support the wire threading catheter to ensure that the electrode wire can pass stably during the wire threading process. The telescopic wire threading catheter 5 is the track for the movement of the lifting piston, which provides space for the lifting piston to move up and down. The guide positioning hole 6 is used to position the electrode wire 13 to ensure that the electrode wire is positioned during processing to improve cutting accuracy. The lifting piston 7 is a key component for lifting. It realizes the lifting action by controlling the lowering air inlet 10 and the raising air inlet 11.

[0035] The piston seal ring 8 and the return seal ring 9 are respectively installed on the lifting piston to ensure the sealing and stability between the lifting piston and the telescopic wire guide tube. The lowering air inlet 10 and the raising air inlet 11 are used to control the inlet and outlet of the gas, thereby driving the lifting and lowering movement of the lifting piston. The cutting fluid enters the first water inlet 12 and flows to the second water inlet 16 and is discharged through the water outlet 17 to clean and cool the electrode wire 13 and the workpiece.

[0036] The conductive block 18 connects the power supply to the electrode wire to ensure that the electrode wire can be normally energized during the processing. The workpiece groove 19 is the target position for the electrode wire 13 to penetrate, and the current is passed to make the electrode wire cut the workpiece groove 19 part.

[0037] Working principle: The telescopic wire-threading guide tube 5 is extended to the concave hole 20 under the workpiece through the driving mechanism, and the electrode wire 13 passes through the concave hole 20 of the workpiece into the telescopic wire-threading guide tube 5 and rolls on the wire feeding wheel 14 and is transported through the guide wheel 15 to complete the wire threading and wire feeding work.

[0038] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A wire feeding and guiding mechanism for threading a wire through a concave hole, comprising a wire feeding mechanism (1), a fixing seat (2), and a driving mechanism, wherein the fixing seat (2) is on the wire feeding mechanism (1), and is characterized in that: A guide wire lifting channel (3) is provided in the fixed seat (2), a telescopic wire threading tube (5) is provided inside the guide wire lifting channel (3), and the telescopic wire threading tube (5) can be extended or retracted into the guide wire lifting channel (3) under the action of a driving mechanism. A lifting piston (7) is provided in the guide wire lifting channel (3) inside the fixed seat (2), the lower end of the lifting piston (7) is connected to the pipeline of the lifting air inlet hole (11), and the upper end of the lifting piston (7) is connected to the pipeline of the lowering air inlet hole (10) to form a driving mechanism.

2. A wire feeding and guiding mechanism for threading wire through a lower concave hole according to claim 1, characterized in that: The telescopic wire-threading conduit (5) extends out of the wire-guide lifting channel (3) and can be inserted into the concave hole (20) under the workpiece, and the electrode wire (13) passes through the telescopic wire-threading conduit (5) through the processed hole position of the workpiece.

3. A wire feeding and guiding mechanism for threading wire through a lower concave hole according to claim 1, characterized in that: The upper end of the guide wire lifting channel (3) is provided with a catheter positioning bearing (4).

4. A wire feeding and guiding mechanism for threading a wire through a lower concave hole according to claim 1, characterized in that: The upper end of the telescopic wire-threading conduit (5) is provided with a guide positioning hole (6) for positioning the electrode wire (13).

5. A wire feeding and guiding mechanism for threading wire through a lower concave hole according to claim 1, characterized in that: The lifting piston (7) and the telescopic wire threading conduit (5) are integrally formed.

6. A wire feeding and guiding mechanism for threading wire through a lower concave hole according to claim 1, characterized in that: The outer surface of the lifting piston (7) is covered with a piston sealing ring (8), and the upper part of the piston sealing ring (8) is provided with a return sealing ring (9).

7. A wire feeding and guiding mechanism for threading wire through a lower concave hole according to claim 5, characterized in that: The lower end of the guide wire lifting channel (3) is provided with a first water inlet hole (12), the upper end of the guide wire lifting channel (3) is provided with a second water inlet hole (16), and the top end of the guide wire lifting channel (3) is provided with a water outlet (17).

8. A wire feeding and guiding mechanism for threading wire through a lower concave hole according to claim 2, characterized in that: The electrode wire (13) is inserted into the telescopic wire-threading conduit (5) and rolls on the outer surfaces of the wire-feeding wheel (14) and the guide wheel (15).

9. A wire feeding and guiding mechanism for threading a wire through a lower concave hole according to any one of claims 1 to 4, characterized in that: The outer diameter of the telescopic wire-threading conduit (5) is 1.5 mm to 4 mm, and the telescopic wire-threading conduit (5) is inserted into a narrower or wider hole position of the concave hole (20) under the workpiece.

Images