Wire feeding and dismounting method and device for wire cutting

Abstract

A wire-electrode cutting wire feeding and dismounting method comprises the steps that a wire pulling clamp is controlled to clamp a molybdenum wire with a certain distance from the end to the position above a wire winding cylinder from the position above an upper guide wheel, a wire clamping device is opened, the end of the molybdenum wire is arranged between a wire clamping device fixing ring and a wire pressing ring, then the wire clamping device is attracted to clamp the molybdenum wire, the wire pulling clamp is opened to loosen the molybdenum wire, and wire feeding is completed. During wire dismounting, the front position of the end of the molybdenum wire is roughly detected, the wire clamping device is opened to release the molybdenum wire, the molybdenum wire is recycled by the wire winding drum, and then the end position of the molybdenum wire is precisely detected to return the end of the molybdenum wire to the position between the lower guide nozzle and the lower guide wheel; according to the method, a wire clamp which comprises a plurality of magnet fixing rings, a wire pressing ring and a wire removing ring, a wire pulling clamp which comprises a wire pulling clamp main body, a wire pressing sheet and a wire pressing magnet, a first detection switch, a second detection switch, a third detection switch, a first clamp loosening air cylinder and a second clamp loosening air cylinder are adopted, and the method is a great improvement in the field of wire cutting automatic threading.

Description

Technical Field

[0001] The invention relates to the field of automatic wire threading for wire cutting, and provides a method and a device for threading and removing wires for wire cutting. Background Art

[0002] The existing automatic wire cutting method is to guide the molybdenum wire from bottom to top through the guide tube to the upper guide wheel, then pull the molybdenum wire to the wire drum, and automatically remove the wire after processing. However, the publication number is CN 119973262 A wire cutting automatic wire threading device has the following defects: 1. The wire clamp adopts a spring and an electromagnetic coil, which is large in size and difficult to install, and the molybdenum wire is easily bent when threading, affecting the subsequent threading; 2. The wire end fixing ring of the molybdenum wire needs to stop when threading and removing the wire, which is easy to hit the machine, posing a safety hazard; 3. The molybdenum wire end cannot be accurately returned to the space between the lower guide nozzle and the lower guide wheel when removing the wire, resulting in a low success rate of wire threading. The present invention provides a wire cutting and wire removing method and device, which utilizes the characteristic that the closer the distance between the magnets, the greater the suction force, so that the wire clamp and the wire clamp can clamp the wire more firmly and release the wire more easily. The wire clamp adopts a removing coil and a first removing switch. The wire reel does not need to stop when removing the wire, and the action is smooth and safe. The wire is collected by a CNC tightening wheel, which is more accurate. The present invention solves various defects in the prior art. The wire reel motor does not require a high-cost CNC motor, which is a major improvement in the field of automatic wire threading in wire cutting. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a wire cutting wire feeding and wire removal method, which is characterized by: Control the wire clamp with magnet to move to the top of the upper guide wheel and open it, place the molybdenum wire at a certain distance from the end of the molybdenum wire on the wire clamp, and control the magnet to attract the wire clamp to clamp the molybdenum wire; The transmission device moves the wire clamp from above the upper guide wheel to above the wire reel; Control the wire clamp to open and place the end of the molybdenum wire between the wire clamp fixing ring and the pressure coil; The wire clamp is controlled to close and clamp the molybdenum wire, and the wire clamp with magnet is opened to release the molybdenum wire, and the machine tool performs cutting processing; When removing the wire, roughly check the front position of the molybdenum wire end; Control the wire clamp with magnet to open, release the end of the molybdenum wire, and reel in the wire; Accurately detect the position of the molybdenum wire end and control the molybdenum wire end to retract between the lower guide nozzle and the lower guide wheel; The present invention provides a wire cutting wire feeding and wire removing device, which is characterized in that it includes a wire clamp, the wire clamp includes a fixed ring, a pressing coil, and a removing coil, the fixed ring is annular, and a plurality of magnets are embedded on one side, the pressing coil is an annular metal ring, and is fixedly connected to the removing coil by a connecting rod passing through a through hole on the fixed ring, the inner diameters of the pressing coil and the removing coil are larger than the fixed ring, and the device also includes a wire pulling clamp, the wire pulling clamp includes a wire pulling clamp body, a wire pressing piece, and a wire pressing magnet, the wire pressing piece is connected to the wire pulling clamp body through a rotating shaft, and the device also includes a wire removing cylinder, a wire removing top block, a first detection switch, a second detection switch, and a third detection switch at the end of the molybdenum wire, and also includes a first loosening cylinder and a second loosening cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Attachment Figure 1 Schematic diagram of the process of the present invention; Attachment Figure 2 Schematic diagram of the device of the present invention; Attachment Figure 3 This is a schematic diagram of the pull-wire clamp; Attachment Figure 4 This is a schematic diagram of the main body of the wire clamp; Attachment Figure 5 This is a schematic diagram of the wire clamp pressure piece; Attachment Figure 6 Schematic diagram of the upper guide wheel area device; Attachment Figure 7 Schematic diagram of the winding drum area device Figure 1 ; Attachment Figure 8 Schematic diagram of the winding drum area device Figure 2 ; Attachment Figure 9 It is the structural intention of the wire clamp; Attachment Figure 10 Schematic diagram of the wire tightening device.

[0005] The present invention will be further described below in conjunction with the accompanying drawings: Attachment Figure 1 The figure is a schematic flow chart of the method of the present invention, which is a single-threading method flow chart; Attachment Figure 2 Schematic diagram of the device of the present invention, wherein 01 is the thread removal cylinder, 02 is the thread clamp, 03 is the third detection switch, 04 is the second pulley, 05 is the belt, 06 is the third mounting plate, 07 is the wire tightening device, 08 is the column, 09 is the second mounting plate, 10 is the first pulley, 11 is the thread pulling clamp, 12 is the lead tube drive wheel, 13 is the lead tube drive wheel motor, 14 is the first detection block, 15 is the first detection switch cylinder, 16 is the second detection block, 17 is the first mounting plate, 18 is the thread holder, and 19 is the taper head; Attachment Figure 3Schematic diagram of the wire pulling clamp, where 20 is the wire pulling clamp body, 21 is the magnet, 22 is the suction piece, 23 is the suction piece loosening area, 24 is the loosening wire, 25 is the wire pressing piece rotation axis, 26 is the wire pulling clamp body wire pressing piece, 27 is the lead tube through hole, 28 is the wire pressing piece, and 29 is the suction piece rotation axis; Attachment Figure 4 Schematic diagram of the main body of the wire clamp, where 30 is the main body base of the wire clamp, 31 is the main body mounting dovetail, 32 is the rotation axis hole of the suction piece, 26 is the main body pressing piece of the wire clamp, 34 is the rotation axis hole of the pressing piece, and 35 is the semicircular groove for the main body lead tube through hole; Attachment Figure 5 Schematic diagram of the wire clamp, where 40 is the wire pressing area, 41 is the semicircular groove for the wire tube through hole of the wire clamp, 42 is the loose wire, 43 is the rotating shaft hole, 44 is the wire clamp transition area, and 45 is the transition step; Attachment Figure 6 Schematic diagram of the upper guide wheel area device, where 50 is the second detection switch cylinder, 16 is the second detection block, 52 is the molybdenum wire, 11 is the wire clamp, 54 is the first loosening cylinder shaft, 14 is the first detection block, 56 is the first detection switch, 57 is the first detection switch cylinder shaft, 17 is the first mounting plate, 15 is the first detection switch cylinder, 60 is the wire clamping area of ​​the wire clamp, 05 is the belt, 10 is the first pulley, 63 is the first loosening cylinder, 64 is the first loosening cylinder fixing seat, 09 is the second mounting plate, 66 is the dovetail seat, 67 is the second detection switch wire, 31 is the main body mounting dovetail, 68 is the first detection switch wire, and 69 is the upper guide wheel; Attachment Figure 7 Schematic diagram of the winding drum area device Figure 1 , where 70 is the wire reel, 71 is the second loosening cylinder, 72 is the second loosening cylinder fixing seat, 73 is the second loosening cylinder shaft, 06 is the third mounting plate, 03 is the third detection switch, 76 is the wire clamp position detection switch, 04 is the second pulley, 11 is the wire clamp, 23 is the suction plate loosening area, 80 is the molybdenum wire, 01 is the wire removal cylinder, 82 is the molybdenum wire end guide plate, and 02 is the wire clamp; Attachment Figure 8 Schematic diagram of the winding drum area device Figure 2 , where 02 is the wire clamp, 91 is the molybdenum wire for wire removal, 92 is the molybdenum wire for wire loading, 93 is the detection piece for the third detection switch, 03 is the third detection switch, 96 is the wire reel seat, 97 is the roller, 98 is the wire removal top block, and 01 is the wire removal cylinder; Attachment Figure 9 The schematic diagram of the wire clamp structure shows that 100 is the pressing coil, 101 is the mounting hole, 102 is the anti-slip groove, 103 is the connecting tenon, 104 is the magnet, 105 is the fixing ring, 106 is the connecting rod through hole, 107 is the coil removal, and 108 is the connecting rod. Attachment Figure 10Schematic diagram of the wire tightening device, wherein 110 is the transition wheel, 111 is the wire tightening wheel, 112 is the wire tightening arm, 113 is the slider, 114 is the rotating shaft of the wire tightening arm, 115 is the wire threading detection switch, 116 is the wire threading spring, 117 is the spring seat, 118 is the wire tightening detection switch, 119 is the wire tightening spring, and 07 is the wire tightening module.

[0006] The following is a further description of the accompanying drawings. 21 is a magnet mounted on the base 30 of the wire clamp body. The suction piece 22 is connected to the wire clamp body 20 through the suction piece rotating shaft 29. The wire pressing piece 28 is connected to the wire clamp body 20 through the wire pressing piece rotating shaft 25. When the magnet 21 sucks the suction piece 22 tightly, the wire pressing piece 28 is pressed tightly against the wire clamp body wire pressing piece 26. The wire pressing area 40 can press the molybdenum wire. There is an arc-shaped step between the transition step 45 and the wire pressing piece transition area 44. The height is greater than the diameter of the molybdenum wire. When the wire clamp wire pressing area 40 presses the molybdenum wire and rotates, the molybdenum wire can slide to the arc edge of the transition step 45 in the wire pressing piece transition area 44 to ensure that the molybdenum wire is not Bending, the semicircular groove 41 of the lead tube through hole of the wire pressing piece and the semicircular groove 35 of the lead tube through hole of the main body can form the lead tube through hole 27, and the second loosening cylinder shaft 73 pushes the suction piece 22 away from the loosening area 23 of the suction piece to open the loosening wire 24 installed on the wire pressing piece 28 to separate the wire pressing piece 28 from the wire pressing piece 26 of the wire pulling clamp main body to release the molybdenum wire, and the wire pulling clamp 11 is installed on the dovetail seat 66 through the main body mounting dovetail 31, and the dovetail seat 66 is installed on the belt 05, and the belt 05 is installed on the first pulley 10 and the second pulley 04, the first pulley 10 is installed on the second mounting plate 09, and the second mounting plate 09 is installed on the upper wire frame 18; Attachment Figure 9The structure of the wire clamp is intended, in which the fixed ring 105 is two semicircular rings fixedly mounted on the wire reel 70, and there is a through hole on the fixed ring 105 for connecting the connecting rod 108 to the pressing coil 100 and the removing coil 107. The connecting rod 108 is mounted on the removing coil 107, and there is a screw hole for connecting the pressing coil at the end. The inner diameters of the pressing coil 100 and the removing coil 107 are about 2 mm larger than the inner diameter of the fixed ring 105. The pressing coil 100 is mounted on the connecting rod 108 by screws, and the length of the connecting rod 108 is about 4 mm greater than the thickness of the fixed ring 105. A magnet 104 is embedded on one side of the pressing coil 100 of the fixed ring 105, and a roller 97 is mounted on the wire removing top block 98 to reduce the friction between the wire removing top block 98 and the wire removing top block 98. The friction between the wire removal coils 107, the wire removal top block 98 is installed on the push rod of the wire removal cylinder 01, and the wire removal cylinder 01 is installed on the wire reel seat 96. When the wire removal cylinder 01 pushes the wire removal coil 107 through the wire removal top block 98, the pressing coil 100 is separated from the fixed ring 105. The anti-slip groove 102 on the outer edge of the pressing coil 100 can ensure that the molybdenum wire winding path does not slip when it turns from between the pressing coil 100 and the fixed ring 105 to the wire reel when the wire reel rotates. The fixed ring 105 is fixedly installed on the wire reel 70. The pressing coil 100 and the removing coil 107 are connected by a connecting rod 108 passing through the connecting rod through hole 106 on the fixed ring 105, and can move or swing relative to the fixed ring 105; The third detection switch 03 is installed on the wire reel seat 96. When the wire reel rotates forward, the molybdenum wire 92 slides from the third detection switch detection piece 93 to the wire reel, and the third detection switch 95 has no response. When the wire is removed, the wire reel reverses the molybdenum wire 91 to lift the third detection switch detection piece 93, and the third detection switch 95 detects that the molybdenum wire is approaching the end. The second loosening cylinder 71 is mounted on the third mounting plate 06 via the second loosening cylinder fixing base 72. The wire clamp position detection switch 76 is mounted on the third mounting plate 06 to detect the wire clamp position. The third mounting plate 06 is mounted on the column 08. The first detection block 14 is installed on the first detection switch cylinder shaft 57, the first detection switch cylinder 15 is installed on the first mounting plate 17, the first mounting plate 17 is installed on the tapered head 19, the first detection switch 56 is installed on the first detection block 14, the first detection switch steel wire 68 is arc-shaped, and when the wire is tightened, the first loosening cylinder shaft 54 ​​opens the wire clamp 11, and the lead tube pulls the molybdenum wire upward from the lead tube through-hole 27. The first detection block 14 is pushed by the first detection switch cylinder 15, and the molybdenum wire squeezes the first detection switch steel wire 68. The first detection switch 56 is disconnected, and at the same time, the molybdenum wire moves from the lead tube through-hole 27 to the wire clamping area 60 of the wire clamp. The molybdenum wire rises to the set height and then pulls back. When the end of the molybdenum wire is lower than the first detection switch steel wire 68, the first detection switch 56 is turned on, and the wire clamp 11 clamps the molybdenum wire to ensure that the end of the molybdenum wire is a certain distance away from the wire clamp. The second detection block 16 is mounted on the second detection switch cylinder 50, which is mounted on the first mounting plate 17. When removing the wire, the second detection block 16 is pushed by the second detection switch cylinder 50. When the end of the molybdenum wire is lower than the second detection switch wire 67, the second detection switch is turned on. The first loosening cylinder 63 is mounted on the second mounting plate 09 through the first loosening cylinder fixing seat 64, the first pulley 10 is mounted on the second mounting plate 09, and the second mounting plate 09 is mounted on the upper wire rack 18; The molybdenum wire end guide piece 82 is a V-shaped piece with an opening at the bottom and is installed on the wire removal top block 98. It can guide the molybdenum wire end to between the separated pressing coil 100 and the fixing ring 105. The transition wheel 110 is installed on the column 08, the tightening wheel 111 is installed on the tightening arm 112, the tightening arm 112 is installed on the slider 113 through the tightening arm rotating shaft 114, the slider 113 is installed on the tightening device 07 module, the tightening device 07 module is installed on the column 08, the wire threading spring 116 has a relatively small elastic force, and the wire threading detection switch 115 controls the module slider to rise and fall to control the molybdenum wire tension. The wire tightening spring 119 has a relatively large elastic force, and the wire tightening detection switch 118 controls the module slider to rise and fall to control the molybdenum wire tension during processing. The tightening module is lifted and lowered by a CNC motor. Specific embodiments

[0007] The following is an explanation of the process of threading and unthreading the wire: Step 1: The wire clamp is driven by the belt to move to the top of the upper guide wheel. The first loosening cylinder opens the wire clamp. The wire tube passes through the hole of the wire clamp and pulls the molybdenum wire from the lower guide nozzle to the top of the first detection block. The first detection block advances, the first detection switch is disconnected, and the molybdenum wire is pushed to the clamping area of ​​the wire clamp. The molybdenum wire is pulled back to the bottom of the first detection block, the first loosening cylinder retracts, and the wire clamp is clamped by the magnet with the molybdenum wire end exposed about 40mm from the wire clamp. Step 2: The wire clamp is driven by the belt to move to the wire clamp position detection switch 76; Step 3: The wire removal cylinder pushes the wire removal coil through the wire removal top block. At this time, the pressing coil and the fixed ring are separated. The wire pulling clamp is driven by the belt to continue to move and guide the molybdenum wire end through the molybdenum wire end guide piece and send it between the pressing coil and the fixed ring. The transition step of the wire pulling clamp pressing piece can prevent the molybdenum wire from being bent when the wire pulling clamp rotates around the second pulley. Step 4: The wire removal cylinder retreats to loosen the wire removal coil, and the pressure coil and the fixed ring are sucked and pressed by the magnet to compress the molybdenum wire. The second loosening cylinder advances, and the wire clamp suction piece is separated from the magnet. The loosening steel wire drives the pressure piece to separate from the pressure piece of the wire clamp body to release the molybdenum wire. The wire tightening device controls the slider to rise and stop when the wire threading detection switch is turned on. The wire reel rotates forward, and the molybdenum wire slides off the detection piece of the third detection switch and is wound on the wire reel for a certain number of turns; the wire tightening module controls the slider to rise and stop when the wire tightening detection switch is turned on, and the machine tool enters the processing state; Step 5: After the processing is completed, the wire tightening device controls the slider to descend and stop when the wire tightening detection switch is disconnected. The wire reel reverses. When the molybdenum wire approaches the end, the third detection switch detection piece is lifted from below. The third detection switch is turned on, and the second detection block is pushed forward by the second detection switch cylinder. The molybdenum wire disconnects the second detection switch. Step 6: The wire removal cylinder 01 pushes the wire removal coil through the wire removal top block. At this time, the pressure coil and the fixed ring are separated to release the molybdenum wire end. The wire reel continues to reel in the wire, and the second detection switch cylinder retracts. Step 7: When the end of the molybdenum wire is lower than the second detection block, the wire reel stops rotating, the wire tightening device controls the slider to rise to a certain height and accurately retracts the end of the molybdenum wire to between the lower guide nozzle and the lower guide wheel, the second detection switch cylinder retracts, and the above steps are repeated for the next wire threading.

[0008] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A wire cutting wire threading and wire unthreading method, characterized in that include: Step 1: Control the wire clamp with magnet to move to the top of the upper guide wheel and open it, place the molybdenum wire at a certain distance from the end of the molybdenum wire on the wire clamp, and control the magnet to attract the wire clamp to clamp the molybdenum wire; Step 2: The transmission device moves the wire clamp from above the upper guide wheel to above the wire reel; Step 3: Control the wire clamp to open and place the end of the molybdenum wire between the wire clamp fixing ring and the pressure coil; Step 4: Control the wire clamp to close and clamp the molybdenum wire, open the wire clamp with magnet to release the molybdenum wire, and the machine tool starts cutting; Step 5: Roughly check the position of the molybdenum wire end when removing the wire; Step 6: Control the wire clamp to open, release the end of the molybdenum wire, and reel the wire into the wire drum; Step 7: Accurately detect the position of the molybdenum wire end and control the molybdenum wire end to retract between the lower guide nozzle and the lower guide wheel.

2. A wire cutting and wire unwinding method according to claim 1, characterized in that The invention comprises: after accurately detecting the end position of the molybdenum wire, a wire tightening guide wheel controlled by a numerical control motor pulls the molybdenum wire back to the precise position.

3. A wire cutting wire feeding and removing device, characterized by: It includes a wire clamp, which includes a fixed ring, a pressing coil and a removing coil. The pressing coil is annular and is fixedly connected to the removing coil by a connecting rod passing through a through hole on the fixed ring. The inner diameters of the pressing coil and the removing coil are larger than those of the fixed ring.

4. A wire cutting wire feeding and removing device, characterized by: The utility model comprises a wire pulling clamp, which comprises a wire pulling clamp body, a wire pressing piece, and a wire pressing magnet. The wire pressing piece is connected to the wire pulling clamp body via a rotating shaft.

5. A wire cutting wire feeding and removing device according to claim 3, characterized in that: It also includes a wire removal cylinder, a wire removal top block, a first detection switch, a second detection switch, and a third detection switch at the end of the molybdenum wire. Multiple magnets are embedded on one side of the fixing ring, and the pressing coil is an annular metal ring.

6. A wire cutting wire feeding and removing device according to claim 4, characterized in that: It also includes a first loosening cylinder and a second loosening cylinder, and the wire pressing piece is provided with an arc-shaped transition step.

7. A wire cutting wire feeding and removing device according to claim 5, characterized in that: It also includes a wire tightening device, which includes a wire threading spring, a wire threading detection switch, a wire tightening spring, and a wire tightening detection switch.

8. A wire cutting machine tool as claimed in claim 1.

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