Wire tightening mechanism of linear cutting machine tool

Abstract

The utility model discloses a wire tightening mechanism of a linear cutting machine tool, relates to the field of linear cutting machine tools, and aims to solve the problems that the elastic force of a spring changes along with the telescopic degree of the spring, so that the tensile force of an electrode wire changes, and the electrode wire cannot be tightened by constant tensile force. According to the technical scheme, one end, close to a thread rolling cylinder, of a thread feeding frame is fixedly provided with a gravity thread tightening structure, the gravity thread tightening structure comprises a thread tensioning panel fixedly arranged at one end, close to the thread rolling cylinder, of the thread feeding frame, the thread tensioning panel is fixedly provided with a thread feeding guide wheel, and the thread tensioning panel is provided with a vertical sliding groove in a penetrating mode; a guide wheel is fixedly arranged at the end, close to the wire expansion panel, of the wire feeding frame, and the outer edges of the two sides of the wire outlet guide wheel are attached to the outer edge of the wire feeding guide wheel and the outer edge of the guide wheel in the vertical direction correspondingly. Therefore, continuity and stability of the linear cutting machining process are guaranteed, and the cutting quality is improved.

Description

Technical Field

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

[0002] Wire cutting machine is also known as electric spark cutting machine. Its principle is to use metal wire (molybdenum wire, copper wire or alloy wire) to make pulse electric spark discharge between electrode wire and workpiece, generate high temperature to liquefy metal and vaporize to form cutting seam, thereby realizing the function of cutting workpiece. During the cutting process, if the electrode wire is not tensioned, it is easy to slip off the guide wheels, thus making it impossible to realize continuous cutting process. In order to maintain the stability of cutting, it is necessary to equip a wire tensioner to keep the electrode wire in a taut state at all times.

[0003] The existing patent number is CN113000957A, which is an automatic wire tightening device for an electric spark wire cutting machine tool. The wire tightener mainly uses spring elastic force to tighten the electrode wire, provide tension for the electrode wire, and achieve the effect of tightening the electrode wire.

[0004] However, the tension provided by the spring causes the spring to expand and contract as the electrode wire plastically deforms. The spring force changes with its own expansion and contraction degree, which in turn causes the tension of the electrode wire to change. It is impossible to maintain a constant tension to tighten the electrode wire. The tension of the electrode wire changes accordingly, affecting the cutting effect. Utility Model Content

[0005] The utility model aims to provide a wire-tightening mechanism for a wire cutting machine. The weight hammer can ensure constant tensioning force during the plastic deformation of the electrode wire by relying on its own weight.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The machine comprises a bed, a wire conveying base and a vertical column are fixedly installed on the top wall of the bed, a wire conveying base is rotatably installed with a wire rolling drum, an upper wire rack is fixedly installed on the outer wall of the column, a horizontal motion component located below the upper wire rack is fixedly installed on the top wall of the bed, an upper support plate for placing workpieces is fixedly installed on the top wall of the horizontal motion component close to the upper wire rack, a gravity wire tightening structure is fixedly installed on one end of the upper wire rack close to the wire rolling drum, and the gravity wire tightening mechanism comprises a wire tensioning panel fixedly installed on one end of the upper wire rack close to the wire rolling drum, and the wire tensioning panel is fixedly installed A wire feeding guide wheel is provided, a vertical sliding groove is penetrated through the wire tensioning panel, the sliding groove is engaged with a sliding heavy hammer body, a wire outlet guide wheel and a protective cover covering the wire outlet guide wheel are fixedly provided on the outer wall of the heavy hammer body, a guide wheel is fixedly provided at one end of the upper wire rack close to the wire tensioning panel, the outer edges of both sides of the wire outlet guide wheel are respectively arranged in vertical direction in contact with the outer edges of the wire feeding guide wheel and the guide wheel, the wire rolling drum is wound with a cutting electrode wire, and the cutting electrode wire is sequentially connected to the wire feeding guide wheel, the wire outlet guide wheel, the guide wheel, the upper wire rack, the upper support plate and the wire rolling drum in a closed loop.

[0008] By adopting the above technical scheme, the cutting electrode wire arranged in a closed loop drives the cutting electrode wire to move together through the reciprocating rotation motion of the wire rolling drum, thereby realizing the cutting of the workpiece. Since the outer edges on both sides of the wire outlet guide wheel are respectively in contact with the outer edges of the wire feed guide wheel and the guide wheel in the vertical direction, the passing cutting electrode wire presents a standard U-shaped structure. The cutting electrode wires on both sides of the wire outlet guide wheel are always in the vertical direction, and the direction of the pulling force will not be shifted. The position of the weight body changes under the action of gravity, and a constant tensioning force can be applied to the cutting motor wire, thereby ensuring the continuity and stability of the wire cutting process and achieving the effect of improving the cutting quality. The protective cover fixedly covers the wire tensioning panel to prevent the wire cutting liquid from dripping into the gravity tightening structure, and prevents impurities such as metal debris in the wire cutting liquid from affecting the sliding of the weight body or the rolling of the wire outlet guide wheel, thereby improving the service life of the entire weight.

[0009] Furthermore, a locking block with an outer edge engaged with the sliding groove is extended from one side of the weight hammer body close to the wire-tensioning panel, and a limiting plate that abuts against the outer wall of the wire-tensioning panel is fixedly provided on the side of the locking block away from the weight hammer body. The limiting plate and the weight hammer body are clamped on both sides of the wire-tensioning panel, and an elastic buffer cylinder is fixedly provided on the outer edge of the locking block close to both ends of the sliding groove in the length direction, and the elastic buffer cylinder is hollow cylindrical.

[0010] By adopting the above technical scheme, the locking block combined with the limit plate can make the heavy hammer body and the wire tensioning panel firmly combined while facilitating sliding. The hollow cylindrical elastic buffer tube has a good buffering effect, which can effectively prevent the heavy hammer body from being damaged by a rigid collision with the wire tensioning panel when it explodes, and has a good protective effect.

[0011] Furthermore, a guide rail slider is fixedly provided on one side of the weight body close to the wire-tensioning panel, and a linear guide rail is provided on the outer wall of the wire-tensioning panel along the sliding direction of the weight body.

[0012] By adopting the above technical solution, the guide rail slider cooperates with the linear guide rail to effectively guide and limit the movement direction of the heavy hammer body, ensuring that the heavy hammer body moves stably for a long time.

[0013] Furthermore, the horizontal motion component includes a lateral moving component fixedly arranged on the top wall of the bed, a middle support plate is fixedly arranged on the top wall of the lateral moving component, a longitudinal moving component is fixedly arranged on the top wall of the middle support plate, the upper support plate is fixedly arranged on the top wall of the longitudinal moving component, a vertical moving component is fixedly arranged on a side of the outer wall of the column close to the upper wire rack, the upper wire rack is fixedly installed on the vertical moving component, and the longitudinal moving component, the lateral moving component and the vertical moving component are a screw crank structure.

[0014] By adopting the above technical solution, the lateral moving component, the top wall of the longitudinal moving component, and the vertical moving component cooperate with each other, and the moving distance of the upper support plate can be flexibly adjusted in the three-dimensional direction. Combined with the lead screw, the processing trajectory of the workpiece can be adjusted smoothly with high precision, achieving good processing effects.

[0015] Furthermore, a threaded locking column is provided through the wire tensioning panel, one end of the locking column is arranged to abut against the heavy hammer body, and a wire tensioning knob is fixedly provided on one end of the locking column away from the heavy hammer body.

[0016] By adopting the above technical solution, the wire tensioning knob is turned according to actual needs, and the friction between the locking column and the weight body is controlled to achieve the function of locking or unlocking the weight body. The gravity wire tightening mechanism can be easily switched between the locked and free states, thereby facilitating the operation of the machine tool.

[0017] In summary, the beneficial technical effects of the utility model are:

[0018] 1. The gravity wire tightening structure with constant tension force is adopted to ensure the continuity and stability of the wire cutting process and improve the cutting quality;

[0019] 2. The clamping block, limit plate and elastic buffer cylinder are used to effectively prevent the heavy hammer body from being damaged by rigid collision with the wire tensioning panel when it explodes;

[0020] 3. The locking column and the wire tensioning knob are used, so that the gravity wire tightening mechanism can be easily switched between the locked and free states, thereby facilitating the operation of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the overall structure of the wire inlet guide wheel, the wire outlet guide wheel and the guide wheel in the utility model;

[0024] Figure 3 It is a schematic diagram of the explosion structure of the upper wire rack in the utility model;

[0025] Figure 4 This is a three-dimensional diagram of the gravity tightening wire structure of the utility model;

[0026] Figure 5 It is a front view of the gravity wire tightening structure of the utility model.

[0027] In the figure, 1. bed; 2. column; 3. wire transport base; 31. wire rolling drum; 4. upper wire rack; 5. gravity wire tightening structure; 51. wire tensioning panel; 52. wire inlet guide wheel; 53. sliding groove; 531. engaging block; 532. limit plate; 54. weight body; 55. wire outlet guide wheel; 56. protective cover; 57. guide wheel; 58. elastic buffer cylinder; 59. guide rail slider; 591. linear guide; 6. longitudinal moving assembly; 61. middle support plate; 7. lateral moving assembly; 71. upper support plate; 8. vertical moving assembly; 9. locking column; 91. wire tensioning knob; 10. cutting electrode wire. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] 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.

[0030] See also Figure 1-5 , the utility model provides a technical solution:

[0031] The machine comprises a bed 1, a wire conveying base 3 and a vertical column 2 are fixedly installed on the top wall of the bed 1, a wire conveying base 3 is rotatably installed with a wire rolling drum 31, an upper wire rack 4 is fixedly installed on the outer wall of the column 2, a horizontal motion component located below the upper wire rack 4 is fixedly installed on the top wall of the bed 1, an upper support plate 71 for placing workpieces is fixedly installed on the top wall of the horizontal motion component near the upper wire rack 4, a gravity wire tightening structure 5 is fixedly installed on one end of the upper wire rack 4 near the wire rolling drum 31, and the gravity wire tightening mechanism includes an expansion joint fixedly arranged on one end of the upper wire rack 4 near the wire rolling drum 31 The wire panel 51 is fixedly provided with a wire feed guide wheel 52, and a vertical sliding groove 53 is provided through the wire panel 51. The sliding groove 53 is engaged with a sliding heavy hammer body 54, and a wire outlet guide wheel 55 and a protective cover 56 covering the wire outlet guide wheel 55 are fixedly provided on the outer wall of the heavy hammer body 54. A guide wheel 57 is fixedly provided at one end of the upper wire rack 4 close to the wire raising panel 51. The outer edges of the two sides of the wire outlet guide wheel 55 are respectively arranged in the vertical direction in contact with the outer edges of the wire feed guide wheel 52 and the outer edges of the guide wheel 57. The wire rolling drum 31 is wound with a cutting electrode The cutting electrode wire 10 is connected to the wire inlet guide wheel 52, the wire outlet guide wheel 55, the guide wheel 57, the upper wire rack 4, the upper support plate 71 and the wire rolling drum 31 in a closed loop. The cutting electrode wire 10 in the closed loop is driven by the reciprocating rotation of the wire rolling drum 31 to move the cutting electrode wire 10 together, thereby realizing the cutting of the workpiece. Since the outer edges of the two sides of the wire outlet guide wheel 55 are respectively attached to the outer edges of the wire inlet guide wheel 52 and the outer edges of the guide wheel 57 in the vertical direction, the cutting electrode wire 10 passing through the wire roller 55 has a standard U-shaped structure. 10 is always a force in the vertical direction, and the direction of the pulling force will not be offset. The position of the weight body 54 changes under the action of gravity, and a constant tensioning force can be applied to the cutting motor wire, thereby ensuring the continuity and stability of the wire cutting process and achieving the effect of improving the cutting quality. The protective cover 56 fixes and covers the wire tensioning panel 51, which can prevent the wire cutting liquid from dripping into the gravity wire tightening structure 5, and prevents impurities such as metal debris in the wire cutting liquid from affecting the sliding of the weight body 54 or the rolling of the wire guide wheel 55, thereby improving the service life of the entire weight.

[0032] A clamping block 531 whose outer edge engages with the sliding groove 53 is extended from one side of the weight hammer body 54 close to the wire-raising panel 51, and a limiting plate 532 that contacts the outer wall of the wire-raising panel 51 is fixedly provided on one side of the clamping block 531 away from the weight hammer body 54. The limiting plate 532 and the weight hammer body 54 are clamped on both sides of the wire-raising panel 51, and an elastic buffer cylinder 58 is fixedly provided on the outer edge of the clamping block 531 close to both ends of the sliding groove 53 in the length direction. The elastic buffer cylinder 58 is hollow cylindrical. The clamping block 531 combined with the limiting plate 532 can make the weight hammer body 54 firmly combined with the wire-raising panel 51 while facilitating sliding. The hollow cylindrical elastic buffer cylinder 58 has a good buffering effect, which can effectively prevent the weight hammer body 54 from being damaged by a rigid collision with the wire-raising panel 51 when the weight hammer body 54 bursts, and has a good protective effect.

[0033] A guide rail slider 59 is fixedly set on one side of the weight hammer body 54 close to the wire tensioning panel 51, and a linear guide rail 591 is opened on the outer wall of the wire tensioning panel 51 along the sliding direction of the weight hammer body 54. The guide rail slider 59 cooperates with the linear guide rail 591 to effectively guide and limit the movement direction of the weight hammer body 54, ensuring that the weight hammer body 54 moves stably for a long time.

[0034] The horizontal motion component includes a lateral moving component fixedly arranged on the top wall of the bed 1, a middle support plate 61 is fixedly arranged on the top wall of the lateral moving component 7, a longitudinal moving component 6 is fixedly arranged on the top wall of the middle support plate 61, an upper support plate 71 is fixedly arranged on the top wall of the longitudinal moving component 6, a vertical moving component 8 is fixedly arranged on the side of the outer wall of the column 2 close to the upper wire rack 4, the upper wire rack 4 is fixedly installed on the vertical moving component 8, the longitudinal moving component 6, the lateral moving component 7 and the vertical moving component 8 are a screw crank structure, the lateral moving component 7, the top wall of the longitudinal moving component 6 and the vertical moving component 8 cooperate with each other, and the moving distance of the upper support plate 71 can be flexibly adjusted in the three-dimensional direction, and combined with the lead screw, the processing trajectory of the workpiece can be adjusted smoothly with high precision, and a good processing effect is achieved.

[0035] A threaded locking column 9 is provided through the wire tensioning panel 51, one end of the locking column 9 is arranged to abut against the heavy hammer body 54, and a wire tensioning knob 91 is fixedly provided on the end of the locking column 9 away from the heavy hammer body 54. The wire tensioning knob 91 is turned according to actual needs, and the friction force between the locking column 9 and the heavy hammer body 54 is controlled to achieve the function of locking or unlocking the heavy hammer body 54, so that the gravity wire tightening mechanism can be easily switched between the locked and free states, thereby facilitating the operation of the machine tool.

[0036] 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.

[0037] 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 tightening mechanism for a wire cutting machine tool, comprising a bed (1), a wire conveying base (3) and a vertical column (2) are fixedly mounted on the top wall of the bed (1), a wire rolling cylinder (31) is rotatably mounted on the wire conveying base (3), an upper wire rack (4) is fixedly mounted on the outer wall of the column (2), a horizontal motion component located below the upper wire rack (4) is fixedly mounted on the top wall of the bed (1), an upper support plate (71) for placing a workpiece is fixedly mounted on the top wall of the horizontal motion component close to the upper wire rack (4), and the characteristics are: A gravity wire tightening structure (5) is fixedly installed on one end of the upper wire frame (4) close to the wire rolling drum (31), and the gravity wire tightening structure comprises a wire tensioning panel (51) fixedly installed on one end of the upper wire frame (4) close to the wire rolling drum (31), and a wire feeding guide wheel (52) is fixedly installed on the wire tensioning panel (51), and a vertical sliding groove (53) is penetrated through the wire tensioning panel (51), and a heavy hammer body (54) is slidably arranged in the sliding groove (53), and a wire outlet guide wheel (55) and a wire outlet guide wheel (52) are fixedly installed on the outer wall of the heavy hammer body (54). A protective cover (56) of the wheel (55) is provided, a guide wheel (57) is fixedly provided at one end of the upper wire rack (4) close to the wire tensioning panel (51), the outer edges of both sides of the wire outlet guide wheel (55) are respectively arranged in a vertical direction in contact with the outer edges of the wire inlet guide wheel (52) and the outer edges of the guide wheel (57), the wire rolling drum (31) is wound with a cutting electrode wire (10), and the cutting electrode wire (10) is sequentially connected to the wire inlet guide wheel (52), the wire outlet guide wheel (55), the guide wheel (57), the upper wire rack (4), the upper support plate (71) and the wire rolling drum (31) in a closed loop.

2. The wire tightening mechanism of a wire cutting machine tool according to claim 1, characterized in that: A locking block (531) whose outer edge is engaged with the sliding groove (53) is extended from one side of the weight body (54) close to the wire tensioning panel (51); a limiting plate (532) is fixedly arranged on one side of the locking block (531) away from the weight body (54) to abut against the outer wall of the wire tensioning panel (51); the limiting plate (532) and the weight body (54) are clamped on both sides of the wire tensioning panel (51); elastic buffer tubes (58) are fixedly arranged on the outer edges of the locking block (531) close to both ends of the sliding groove (53) in the length direction; the elastic buffer tube (58) is in the shape of a hollow cylinder.

3. The wire tightening mechanism of a wire cutting machine tool according to claim 2, characterized in that: A guide rail slider (59) is fixedly arranged on one side of the weight body (54) close to the wire tensioning panel (51), and a linear guide rail (591) is provided on the outer wall of the wire tensioning panel (51) along the sliding direction of the weight body (54).

4. A wire cutting machine tool wire tightening mechanism according to claim 3, characterized in that: The horizontal motion component comprises a transverse motion component fixedly arranged on the top wall of the bed (1); a middle support plate (61) is fixedly arranged on the top wall of the transverse motion component (7); a longitudinal motion component (6) is fixedly arranged on the top wall of the middle support plate (61); the upper support plate (71) is fixedly arranged on the top wall of the longitudinal motion component (6); a vertical motion component (8) is fixedly arranged on a side of the outer wall of the column (2) close to the upper wire rack (4); the upper wire rack (4) is fixedly mounted on the vertical motion component (8); and the longitudinal motion component (6), the transverse motion component (7) and the vertical motion component (8) are screw crank structures.

5. The wire tightening mechanism of a wire cutting machine tool according to claim 3, characterized in that: The wire tensioning panel (51) is penetrated by a threaded locking column (9), one end of which is arranged to abut against the heavy hammer body (54), and the end of which is away from the heavy hammer body (54) is fixedly provided with a wire tensioning knob (91).

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