Linear cutting machine tool capable of automatically threading wires

Abstract

The utility model discloses a linear cutting machine tool capable of automatically threading a wire, relates to the field of linear cutting machine tools, and aims to solve the problems that a molybdenum wire is difficult to smoothly and linearly penetrate when softer penetrates through a longer wire slot of an upper wire frame or a lower wire frame, and the molybdenum wire is bent and twisted in the wire slot and cannot smoothly pass through the wire slot. According to the technical scheme, a guide cylinder parallel to wire conveying cylinders at intervals is rotatably mounted on a mounting plate, an inflatable plastic rope is wound around the guide cylinder, an embedding groove with a certain length is formed in the inflatable plastic rope in the length direction, and cutting metal wires are wound around the wire conveying cylinders. The outer edge of the inflatable plastic rope is fixedly provided with a plurality of binding thin ropes attached to the embedding grooves, the cutting metal wires are embedded into the embedding grooves, the binding thin ropes bind the cutting metal wires, the time needed by manual wire threading is greatly shortened, and the effect of improving the wire threading efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire cutting machine tools, in particular to a wire cutting machine tool with automatic wire threading. Background Art

[0002] Wire cutting machine tools belong to the category of electrical machining. They were discovered by the Soviet couple Lazarenko when they were studying the phenomenon and causes of switch contacts being damaged by spark discharge corrosion. They found that the instantaneous high temperature of the electric spark can cause local metal to melt, oxidize and corrode, thus creating and inventing the electric spark machining method. Wire cutting machine tool processing is a branch of electric spark machining. It is a process method that directly uses electric sparks for machining. It uses a moving wire (electrode wire) as a tool electrode to cut the workpiece, so it is called wire cutting. In wire cutting, the relative movement of the workpiece and the electrode wire is realized by digital control, so it is also called CNC electric spark wire cutting, or wire cutting for short.

[0003] During the processing, wire breakage often occurs, and the molybdenum wire needs to be manually lifted and threaded through the transmission wheels one by one. Since the molybdenum wire is soft, it is difficult to pass it straight through the long wire slot of the upper or lower wire rack. It bends and twists in the wire slot and cannot pass through smoothly. The wire threading efficiency needs to be improved. Utility Model Content

[0004] The utility model aims to provide a wire cutting machine tool for automatic wire threading.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The invention comprises a bed, wherein a wire conveying base, a column and a workpiece rack are fixedly provided on the top wall of the bed, a wire conveying base is installed with a wire conveying drum, a horizontal upper wire rack and a lower wire rack are fixedly provided on the outer walls of the top and bottom ends of the column, a pair of mounting plates are extended from the outer wall of the wire conveying base, a guide drum which is spaced and parallel to the wire conveying drum is rotatably installed on the mounting plate, an inflatable plastic rope is wound around the guide drum, an engaging groove of a certain length is provided in the extension direction of the inflatable plastic rope, a cutting wire is wound around the wire conveying drum, a plurality of fitting engaging grooves are fixedly provided on the outer edge of the inflatable plastic rope, and a tying string is provided, the cutting wire is embedded in the fitting groove, the tying string tightly ties the cutting wire, and the inflatable plastic rope passes through the upper wire rack, the workpiece rack and the lower wire rack in turn to return to the guide drum in a closed loop.

[0007] By adopting the above technical scheme, before threading, the inflatable plastic rope is held and passed through the gaps. By pinching the inflatable plastic rope, the internal air pressure at the front end can be increased, and the inflatable plastic rope can remain straight to ensure smooth passage through various longer wire grooves. When it needs to be bent after passing through the guide wheel, the inflatable plastic rope is loosened to reduce the internal air pressure, and the stiffness of the inflatable plastic rope will be greatly reduced and softened, so that it can easily pass through the bending area. After the inflatable plastic rope is closed-loop connected to the guide cylinder, one end of the cutting metal wire is embedded in the embedding groove and then the binding thin rope is tightened to tightly bind the cutting metal wire and the inflatable plastic rope. Then, the guide cylinder is rotated to carry the cutting metal wire to complete the threading. After completion, the bundling is released, the closed-loop cutting metal wire is tightened, and the cutting metal wire can be easily peeled off from the inflatable plastic rope, and the guide cylinder is rotated to recycle the inflatable plastic rope. In summary, the inflatable plastic rope has good passability during the threading operation. Since the cutting electrode wire is embedded in the inflatable plastic rope, it can follow the inflatable plastic rope to pass through various places smoothly, which can greatly reduce the time required for manual threading and achieve the effect of improving the threading efficiency.

[0008] Furthermore, the inflatable plastic rope includes an embedding portion and a guiding portion, the embedding groove is arranged along the length direction of the embedding portion, the end of the guiding portion is rounded, and the embedding groove wall is fixedly provided with a plurality of abutting protrusions.

[0009] By adopting the above technical scheme, the guide part with rounded corners at the end has a good guiding effect. When encountering an obstacle, it will automatically shift and find its position under the action of the arc surface, and has good passability. The contact convex head is made of rubber material with a large friction coefficient and is not easy to slip. It can effectively contact the outer wall of the cutting electrode wire and be tightly bound and fixed by the binding rope, so that the cutting electrode wire and the inflatable plastic rope are more closely combined.

[0010] Furthermore, guide covers are fixedly provided at both ends of the upper wire rack and the lower wire rack, and a guide groove cooperating with the direction of the inflatable plastic rope is provided on a side of the guide cover close to the inflatable plastic rope, and the guide groove is arranged in an arc shape.

[0011] By adopting the above technical scheme, the arc-shaped wire groove has a good guiding effect, automatically guiding the inflatable plastic rope to bend to the specified bending angle at the bending part of the cutting wire, and adjusting the travel direction of the inflatable plastic rope to improve the wire threading efficiency. At the same time, the guide cover can also shield and isolate the bending part of the cutting wire to prevent the working fluid or other impurities from invading, and has a good protective effect.

[0012] Furthermore, a return jack matching the guide portion is provided on the outer wall of the guide tube, a rotating shaft passing through the mounting plate is provided at the center of the guide tube, and a shaking handle is fixedly provided at one end of the rotating shaft.

[0013] By adopting the above technical solution, when the inflatable plastic rope returns to the guide cylinder, it is inserted into the return socket to achieve a closed-loop retraction effect. The setting of the shaking handle makes it convenient for the user to rotate the guide cylinder to retract and release the inflatable plastic rope according to actual needs.

[0014] In summary, the beneficial technical effects of the utility model are:

[0015] 1. It uses inflatable plastic rope, fitting groove and tying string, so that the inflatable plastic rope can be passed through everywhere smoothly, which can greatly reduce the time required for manual threading and achieve the effect of improving threading efficiency;

[0016] 2. The tying rope and the contact convex head are used to effectively contact the outer wall of the cutting electrode wire and tightly bind and fix it under the binding of the tying rope, so that the cutting electrode wire and the inflatable plastic rope are more closely combined;

[0017] 3. A guide cover and a guide groove are used to generate and adjust the traveling direction of the inflatable plastic rope, thereby improving the threading efficiency and preventing the intrusion of working fluid or other impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0021] Figure 3 It is a schematic diagram of the structure of the inflatable plastic rope and the cutting metal wire in the utility model;

[0022] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part B in the middle.

[0023] In the figure, 1. bed; 2. wire transport base; 21. wire transport drum; 3. column; 31. upper wire rack; 32. lower wire rack; 4. workpiece rack; 5. mounting plate; 51. guide cylinder; 52. inflatable plastic rope; 53. fitting groove; 54. tying string; 55. fitting part; 56. guide part; 57. abutting protrusion; 6. cutting wire; 7. guide cover; 71. guide groove; 8. shaking handle. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0026] See also Figure 1-4 , the utility model provides a technical solution:

[0027] The machine comprises a bed 1, a wire conveying base 2, a column 3 and a workpiece rack 4 are fixedly arranged on the top wall of the bed 1, a wire conveying drum 21 is installed on the wire conveying base 2, a horizontal upper wire rack 31 and a lower wire rack 32 are fixedly arranged on the outer wall of the top and bottom ends of the column 3, a pair of mounting plates 5 are extended from the outer wall of the wire conveying base 2, a guide drum 51 which is spaced and parallel to the wire conveying drum 21 is rotatably installed on the mounting plate 5, an inflatable plastic rope 52 is wound around the guide drum 51, and a certain length of interlocking is opened in the extension direction of the inflatable plastic rope 52 The wire conveying drum 21 is wound with a cutting wire 6, and the outer edge of the inflatable plastic rope 52 is fixedly provided with a plurality of fitting grooves 53 and a tying string 54. The cutting wire 6 is embedded in the fitting groove 53, and the tying string 54 is used to tightly bind the cutting wire 6. The inflatable plastic rope 52 passes through the upper wire rack 31, the workpiece rack 4 and the lower wire rack 32 in sequence to return to the guide drum 51 in a closed loop. Before threading, the inflatable plastic rope 52 is held by hand and passed through the gaps. The air pressure inside the front end of the inflatable plastic rope 52 can be increased by pinching the inflatable plastic rope 52. The inflatable plastic rope 52 can remain straight to ensure smooth passage through various longer wire grooves. When it needs to be bent after passing through the guide wheel, the inflatable plastic rope 52 is loosened to reduce the internal air pressure, and the stiffness of the inflatable plastic rope 52 will be greatly reduced and softened, so that it can easily pass through the bending area. After the inflatable plastic rope 52 is closed-loop connected to the guide cylinder 51, one end of the cutting wire 6 is embedded in the embedding groove 53 and then the binding string 54 is tightened to tightly bind the cutting wire 6 and the inflatable plastic rope 52. Then the guide cylinder is rotated to carry the cutting wire 6 to complete the wire threading. After completion, the bundling is released, the closed-loop cutting wire 6 is tightened, and the cutting wire 6 can be easily peeled off from the inflatable plastic rope 52. The guide cylinder 51 is rotated to recycle the inflatable plastic rope 52. In summary, the inflatable plastic rope 52 has good passability during the wire threading operation. Since the cutting electrode wire is embedded in the inflatable plastic rope 52, it can follow the inflatable plastic rope 52 to pass through various places smoothly, which can greatly reduce the time required for manual wire threading and achieve the effect of improving the wire threading efficiency.

[0028] The inflatable plastic rope 52 includes a fitting portion 55 and a guiding portion 56. The fitting groove 53 is arranged along the length direction of the fitting portion 55. The end of the guiding portion 56 is rounded. A plurality of abutting protrusions 57 are fixedly arranged on the groove wall of the fitting groove 53. The guiding portion 56 with rounded end corners has a good guiding effect. When encountering an obstacle, it automatically shifts and finds its position under the action of the arc surface, and has good passability. The abutting protrusion 57 is made of rubber material, which has a large friction coefficient and is not easy to slip. It can effectively abut the outer wall of the cutting electrode wire and be tightly bound and fixed under the binding of the binding rope 54, so that the cutting electrode wire and the inflatable plastic rope 52 are more closely combined.

[0029] Guide covers 7 are fixedly provided at both ends of the upper wire rack 31 and the lower wire rack 32. A guide groove 71 matching the direction of the inflatable plastic rope 52 is provided on one side of the guide cover 7 close to the inflatable plastic rope 52. The guide groove 71 is arranged in an arc shape. The arc-shaped wire groove has a good guiding effect. It automatically guides the inflatable plastic rope 52 to bend to a specified bending angle at the bending part of the cutting wire 6, and adjusts the traveling direction of the inflatable plastic rope 52 to improve the wire threading efficiency. At the same time, the guide cover 7 can also shield and isolate the bending part of the cutting wire 6 to prevent the working fluid or other impurities from invading, and has a good protective effect.

[0030] A return socket that cooperates with the guide portion 56 is provided on the outer wall of the guide cylinder 51. A rotating shaft that passes through the mounting plate 5 is provided at the center of the guide cylinder 51. A shaking handle 8 is fixedly provided at one end of the rotating shaft. When the inflatable plastic rope 52 returns to the guide cylinder 51, it is inserted into the return socket to achieve a closed-loop retraction effect. The setting of the shaking handle 8 makes it convenient for the user to rotate the guide cylinder 51 to retract and release the inflatable plastic rope 52 according to actual needs.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wire cutting machine tool for automatic wire threading, comprising a bed (1), wherein a wire transport base (2), a column (3) and a workpiece rack (4) are fixedly arranged on the top wall of the bed (1), a wire transport drum (21) is installed on the wire transport base (2), and a horizontal upper wire rack (31) and a lower wire rack (32) are fixedly arranged on the outer walls of the top and bottom ends of the column (3), characterized in that: A pair of mounting plates (5) are extended from the outer wall of the wire conveying base (2). A guide cylinder (51) spaced and parallel to the wire conveying cylinder (21) is rotatably mounted on the mounting plate (5). An inflatable plastic rope (52) is wound around the guide cylinder (51). An engaging groove (53) of a certain length is provided in the extension direction of the inflatable plastic rope (52). A cutting metal wire (6) is wound around the wire conveying cylinder (21). A plurality of fitting engaging grooves (53) are fixedly provided on the outer edge of the inflatable plastic rope (52). A tying thin rope (54) is provided. The cutting metal wire (6) is embedded in the engaging groove (53). The tying thin rope (54) tightens the cutting metal wire (6). The inflatable plastic rope (52) passes through the upper wire rack (31), the workpiece rack (4) and the lower wire rack (32) in sequence and returns to the guide cylinder (51) to form a closed loop.

2. The automatic wire threading wire cutting machine according to claim 1, characterized in that: The inflatable plastic rope (52) comprises an engaging portion (55) and a guiding portion (56); the engaging groove (53) is arranged along the length direction of the engaging portion (55); the end of the guiding portion (56) is rounded; and a plurality of abutting protrusions (57) are fixedly arranged on the groove wall of the engaging groove (53).

3. The automatic wire threading wire cutting machine according to claim 2, characterized in that: Guide covers (7) are fixedly arranged at both ends of the upper wire rack (31) and the lower wire rack (32); a guide groove (71) matching the direction of the inflatable plastic rope (52) is provided on a side of the guide cover (7) close to the inflatable plastic rope (52); and the guide groove (71) is arranged in an arc shape.

4. The automatic wire threading wire cutting machine tool according to claim 3 is characterized in that: The outer wall of the guide tube (51) is provided with a return insertion hole matching the guide portion (56); the center of the guide tube (51) is provided with a rotating shaft passing through the mounting plate (5); one end of the rotating shaft is fixedly provided with a shaking handle (8).

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