Automatic wire threading device for wire cutting

Abstract

According to the automatic wire threading device for wire cutting, the wire clamp installed on the belt is adopted to automatically rotate by 90-180 degrees at the belt pulleys at the two ends when the belt moves, the end of a molybdenum wire is pulled to the wire winding drum from the position above the guide wheel, the molybdenum wire is fixed through the molybdenum wire end fixing ring, and the molybdenum wire is prevented from being bent and damaged in the wire threading process; the molybdenum wire threading device solves the defects in the prior art, is simple in structure and good in reliability, and improves the success rate of automatic threading.

Description

Technical Field

[0001] The invention relates to the field of automatic wire threading for wire cutting and provides an automatic wire threading device for wire cutting. Background Art

[0002] When the existing wire cutting machine tool processes the workpiece, the molybdenum wire needs to be passed through the wire threading hole of the workpiece, which requires a lot of manpower. In recent years, several automatic wire threading methods and devices have been disclosed. The automatic wire threading method with publication numbers CN116786926 A and CN119634858 A uses a wire guide to guide the molybdenum wire to the top of the workpiece, then uses a wire hook to pull it to the wire reel, and then uses a spring sheet to fix the end of the molybdenum wire to complete the wire threading action, and uses a wire presser to press the end of the molybdenum wire and pull the molybdenum wire out from the spring sheet to complete the wire removal action. The wire hook, spring sheet and wire presser all bend and damage the end of the molybdenum wire, and a section of the bent molybdenum wire needs to be cut off each time the wire is threaded, resulting in the defect that the useful length of the molybdenum wire becomes shorter after multiple threadings. The present invention has a simple structure and good reliability, and improves the success rate of automatic wire threading. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an automatic wire threading device, which is characterized in that it includes a wire clamp installed on a synchronous belt and can move between an upper guide wheel and a wire drum. When the wire clamp moves from above the upper guide wheel to above the wire drum, it automatically rotates more than 90 degrees, so as to pull the molybdenum wire from the upper guide wheel to the wire drum and fix it on the wire drum while ensuring that the molybdenum wire is not bent or damaged. When threading the wire again, there is no need to cut off the end of the molybdenum wire. The wire clamp includes a main body and an elastic pressing plate, which can electrically compress and release the molybdenum wire. The automatic wire threading device also includes a molybdenum wire end fixing ring installed on the wire drum, and the molybdenum wire end fixing ring includes a main body and an elastic pressing coil, which can compress the molybdenum wire and pneumatically release the molybdenum wire. When the automatic wire threading device is used, the end of the molybdenum wire will not be bent or damaged when the wire is repeatedly threaded, thereby solving the defects existing in the existing automatic wire threading technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Attached Figure 1 It is a schematic diagram of the device of the present invention; Attached Figure 2 Schematic diagram of the wire clamp; Attached Figure 3 This is a schematic diagram of the installation of the wire clamp; Attached Figure 4 This is a schematic diagram of the wire clamp pulling the wire; Attached Figure 5 This is a schematic diagram of a position detection switch for a molybdenum wire end fixing ring; Attached Figure 6 This is a schematic diagram showing that the wire clamp is located above the wire reel; Attached Figure 7 Schematic diagram of the fixing ring at the end of the molybdenum wire.

[0005] The present invention will be further described below in conjunction with the accompanying drawings: Attached Figure 1 Schematic diagram of the device of the present invention: 01 is a wire cutting machine; 02 is a mounting plate; 03 is a molybdenum wire end fixing ring; 04 is a molybdenum wire end fixing ring position detection switch; 05 is a molybdenum wire end fixing ring cylinder; 06 is a belt; 07 is a belt driving wheel; 08 is a pulley motor; 09 is an upper wire rack; 10 is a lead tube; 11 is a lead tube driving wheel mounting plate; 12 is a wire clamp; 13 is an upper guide wheel; 14 is a molybdenum wire end detection block; 15 is a lower wire rack.

[0006] Attached Figure 2 Schematic diagram of the wire clamp: 21 is the belt; 22 is the first pulley; 23 is the wire clamping point of the wire clamp; 24 is the pulley shaft; 25 is the wire clamp body; 26 is the molybdenum wire; 27 is the rotating shaft of the elastic pressure plate of the wire clamp; 28 is the wire pressing spring; 29 is the spring bracket; 30 is the fixed contact; 31 is the contact of the wire clamp; 32 is the magnetic coil; 33 is the elastic pressure plate of the wire clamp; 34 is the lead tube through hole.

[0007] Attached Figure 3 The following is a schematic diagram of the installation of the wire clamp: 41 is the upper guide wheel; 42 is the pulley; 43 is the mounting plate; 44 is the belt; 45 is the molybdenum wire; 46 is the lead tube; 47 is the lead tube drive wheel mounting plate; 48 is the lead tube drive wheel; 49 is the wire clamp body; 50 is the elastic pressure plate rotating shaft; 51 is the spring bracket; 52 is the spring; 53 is the spring bracket fixed contact; 54 is the magnetic coil; 55 is the wire clamp elastic pressure plate; 56 is the molybdenum wire.

[0008] Attached Figure 4 Schematic diagram of the wire clamp wire pulling: 60 is the upper guide wheel; 61 is the molybdenum wire; 62 is the molybdenum wire end detector cylinder; 63 is the molybdenum wire end detection block insulating seat; 64 is the detection contact; 65 is the wire clamp body; 66 is the wire clamp elastic pressing piece.

[0009] Attached Figure 5 Schematic diagram of the molybdenum wire end fixing ring position detection switch: 67 is the wire reel shaft; 68 is the detection sheet; 69 is the induction switch, 70 is a wire reel seat.

[0010] Attached Figure 6 Schematic diagram of the wire clamp located above the wire reel: 71 is the main body of the molybdenum wire end fixing ring; 72 is the main body of the wire clamp; 73 is the mounting plate; 74 is the wire wheel; 75 is the belt; 76 is the belt driving wheel; 77 is the belt tensioning wheel; 78 is the second belt pulley; 79 is the molybdenum wire; 80 is the point where the main body of the molybdenum wire end fixing ring and the elastic wire pressing piece are pressed.

[0011] Attached Figure 7Schematic diagram of the molybdenum wire end fixing ring: 81 is the belt; 82 is the second pulley; 83 is the main body of the molybdenum wire end fixing ring; 84 is the elastic wire pressing piece push rod; 85 is the cylinder top block; 86 is the molybdenum wire end fixing ring cylinder; 87 is the elastic wire pressing piece of the molybdenum wire end fixing ring; 88 is the wire pressing piece spring; 89 is the molybdenum wire end fixing area; 90 is the molybdenum wire; 91 is the fixed contact; 92 is the magnetic coil; 93 is the elastic wire clamping piece; 94 is the mounting plate.

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings: As shown in the accompanying drawings, the belt 06 is installed on the mounting plate 02 through the first pulley 22, the second pulley 78, the belt driving wheel 07 and the belt tensioning wheel 77. The mounting plate 02 is installed on the upper thread rack 09. The pulley motor 08 drives the belt driving wheel 07 to rotate and can drive the clamp 12 installed on the belt to move back and forth between the first pulley 22 and the second pulley 78. The clamp elastic pressing plate 33 is connected to the clamp body 25 through the clamp elastic pressing plate rotating shaft 27. When the clamp 12 moves to the first pulley 22, the clamp 1 2 is perpendicular to the belt contact surface and tangent to the first pulley 22. At this time, when the magnetic coil 32 is connected to the fixed contact 30 installed on the lead tube driving wheel mounting plate 47 through the clamp contact 31 installed on the spring bracket 29, the clamp elastic pressing piece 33 is attracted and the wire pressing spring 28 is compressed. The clamping position 23 of the clamp opens the lead tube 46 and can reach the lower wire rack 15 through the lead tube through hole 34 to guide the end of the molybdenum wire to the top of the clamp 12. When the molybdenum wire slides to the clamping position 23 of the clamp, the magnetic coil 32 is de-energized and the spring 28 presses the molybdenum wire.

[0013] As shown in the accompanying drawings, when the wire clamp body 65 and the wire clamp elastic pressure piece 66 clamp the molybdenum wire and move from the first pulley 22 to the second pulley 78 driven by the belt 06, the molybdenum wire falls on the upper guide wheel 60 installed on the lead tube drive wheel mounting plate 47, the molybdenum wire end detection block insulating seat 63 and the wire wheel 74 installed on the upper wire rack 09 in sequence, and the molybdenum wire end enters the molybdenum wire end fixing area 89 of the molybdenum wire end fixing ring obliquely downward. The parking position of the molybdenum wire end fixing area 89 is detected and controlled by the detection piece 68 and the induction switch 69 installed on the wire reel shaft 67. Before the molybdenum wire enters the molybdenum wire end fixing area 89, the molybdenum wire end fixing ring cylinder 86 acts to press the elastic wire pressing piece. The push rod 84 and the wire pressing piece spring 88 are compressed, and the elastic wire pressing piece 87 of the molybdenum wire end fixing ring is pushed open. After the molybdenum wire enters the molybdenum wire end fixing area 89, the molybdenum wire end fixing ring cylinder 86 retreats, and the elastic wire pressing piece 87 of the molybdenum wire end fixing ring presses the molybdenum wire through the wire pressing piece spring 88; the molybdenum wire end fixing ring 03 is installed on the wire winding drum, and the molybdenum wire end fixing ring cylinder 86 is installed on the wire winding drum seat 70. The elastic wire pressing piece push rod 84 is welded to the wire pressing piece 87, and is connected to the molybdenum wire end fixing ring body 83 through the wire pressing piece spring 88. After the molybdenum wire end is pressed, the magnetic coil 92 is energized through the fixed contact 91 installed on the mounting plate 94, and the molybdenum wire 90 is released by the wire clamp.

[0014] As shown in the accompanying drawings, the insulating seat 63 of the molybdenum wire end detector is installed on the molybdenum wire end detector cylinder 62, which is divided into AB blocks. The molybdenum wire end detector cylinder 62 is installed on the mounting plate 43. When removing the wire, the AB blocks of the insulating seat 63 of the molybdenum wire end detector press the molybdenum wire, and the molybdenum wire is connected to the detection contact 64; the molybdenum wire end fixing ring cylinder 86 is actuated to make the wire pressing piece 87 release the molybdenum wire, and the wire reel rotates to make the molybdenum wire retreat. When the end of the molybdenum wire reaches between the detection contacts 64, the detection contacts 64 are disconnected, and the molybdenum wire retreats a fixed length so that the end point of the molybdenum wire accurately reaches the guide nozzle of the lower wire rack 15 for the next threading. Specific embodiments

[0015] The following is an introduction to the single threading action: Step 1: The pulley motor 08 drives the clamp on the pulley to move to the first pulley 22, the fixed contact 30 is connected with the clamp contact 31, the magnetic coil 32 is energized to attract the clamp elastic pressing piece 33, the clamp clamp 23 opens the lead tube 46 through the lead tube through hole 34 to the lower wire rack 15 to guide the molybdenum wire end to the top of the clamp 12, the wire reel rotates the molybdenum wire back to the end about 5CM higher than the clamp, the magnetic coil 32 loses power, the clamp clamp 23 clamps the molybdenum wire due to the wire pressing spring 28, and the lead tube is separated from the molybdenum wire; Step 2: The pulley motor 08 drives the wire clamp on the pulley to move toward the second pulley 78. At this time, the end of the molybdenum wire is pulled to the wire reel at the same time due to the rotation of the wire clamp from upward to the wire reel. The molybdenum wire falls on the upper guide wheel 60 installed on the lead tube drive wheel mounting plate 47, the molybdenum wire end detector insulating seat 63 and the wire wheel 74 installed on the upper wire rack 09 in sequence, and the end of the molybdenum wire faces obliquely downward; Step 3: When the induction switch 69 detects that the wire pressing piece 87 is in the correct position, the molybdenum wire end fixing circle cylinder 86 acts to press the elastic wire pressing piece push rod 84, the wire pressing piece spring 88 is compressed, and the molybdenum wire end fixing circle elastic wire pressing piece 87 is pushed open. After the molybdenum wire enters the molybdenum wire end fixing area 89, the molybdenum wire end fixing circle cylinder 86 retreats, and the molybdenum wire end fixing circle elastic wire pressing piece 87 presses the molybdenum wire through the wire pressing piece spring 88. The molybdenum wire end is fixed on the wire reel, and the wire clamp moves to the middle position between the first pulley 22 and the second pulley 78. Step 4: The machine tool performs cutting processing until the processing is completed; Step 5: When entering the wire removal stage, the wire reel rotates to the position where the molybdenum wire is fixed, the molybdenum wire end detector clamps the molybdenum wire, the molybdenum wire end fixing ring cylinder 86 is actuated to release the wire pressing piece 87, and the wire reel rotates to make the molybdenum wire retreat. When the molybdenum wire end reaches between the detection contacts 64, the detection contacts 64 are disconnected, and the molybdenum wire retreats a fixed length and the end point of the molybdenum wire accurately reaches the guide nozzle of the lower wire rack 15 for the next threading; Step 6: The machine tool jumps to the next hole; Step 7: Repeat steps 1 to 6.

[0016] The above actions are controlled by the control system.

Claims

1. A wire cutting automatic wire threading device, characterized in that: It includes a mounting plate installed on the upper wire rack, a pulley installed on the mounting plate, a belt, and a wire clamp installed on the belt. When the wire clamp moves from above the upper guide wheel to above the wire reel, it automatically rotates around the pulley, and the rotation angle is greater than 90 degrees and less than 180 degrees. The wire clamp includes a main body and an elastic pressing plate installed on the belt. The elastic pressing plate presses the molybdenum wire through the elastic force of a spring. The wire clamp also includes an electromagnetic coil. When the electromagnetic coil is actuated, the elastic pressing plate and the main body of the wire clamp are opened to release the compressed molybdenum wire. The automatic wire threading device also includes a molybdenum wire end fixing ring installed on the wire reel and a molybdenum wire end fixing ring cylinder on the wire reel seat. The molybdenum wire end fixing ring includes a main body and an elastic wire pressing plate. The elastic wire pressing plate is connected to the main body of the molybdenum wire end fixing ring through a push rod and a spring. When the cylinder on the wire reel seat is actuated, the elastic wire pressing plate is separated from the main body of the molybdenum wire end fixing ring to release the compressed molybdenum wire.

2. An automatic wire threading device for wire cutting as claimed in claim 1, characterized in that: It includes a molybdenum wire end fixing ring position detection switch and a molybdenum wire end detector. The molybdenum wire end fixing ring position detection switch includes a detection piece installed on the wire reel shaft and an induction switch installed on the wire reel fixing seat. The molybdenum wire end detector is installed on the upper wire rack and includes a detection cylinder, an insulating seat installed on the detection cylinder and two detection contacts.

3. A wire cutting machine tool as claimed in claim 1 or 2.

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