Tension adjusting mechanism for wire cutting machine tool

Abstract

The utility model discloses a tensile force adjusting mechanism for a wire cutting machine tool, which relates to the field of wire cutting machines and comprises a machine tool plate, three wire passing wheels are connected to the side face of the machine tool plate, metal wires are connected to the surfaces of the wire passing wheels, a sliding block is arranged in a sliding groove in a penetrating and sliding mode, and the sliding block is fixed to the side face of a pressing block. A rotating groove is formed in the pressing block, a gear is rotationally connected into the rotating groove, the gear is connected to the side face of the gear block in an engaged mode, the gear rotates on the side face, close to the pressing block, of the sliding block, and a rotating block is rotationally connected into the rotating groove. According to the tensile force adjusting mechanism for the wire cutting machine tool, a connecting wheel can be driven to extrude a metal wire by pressing a pressing block, the metal wire can be tightened through a wire passing wheel after being extruded, the tensile force of the cutting machine can be adjusted when the metal wire is tightened, and a ratchet wheel is positioned through a positioning block after adjustment is completed; and the convenience of adjusting the tensile force of the metal wire is improved.

Description

Technical Field

[0001] This utility model relates to the field of wire cutting machine technology, specifically to a tension adjustment mechanism for wire cutting machine tools. Background Technology

[0002] A wire EDM machine is a CNC machine tool that uses a thin metal wire as an electrode to cut workpieces through electrical discharge. A spark discharge occurs between the workpiece and the electrode, generating temperatures of several thousand degrees Celsius. This high temperature melts or evaporates the material on the workpiece, thus achieving cutting. The tension adjustment mechanism is an important part of the wire EDM machine, used to adjust the structure of the metal wire and improve the accuracy of the cutting machine.

[0003] Currently, wire cutting machines still have some shortcomings, such as the electrode wire becoming loose and the tension decreasing, which directly affects the surface finish and machining accuracy of the processed parts.

[0004] To overcome the problem of inconvenient tension adjustment of electrode wire in cutting machines, a Chinese patent (publication number: CN210789562U) discloses that one end of the first screw is fixedly connected to the connecting plate, and the hydraulic cylinder pulls the connecting plate to adjust the tension of the electrode wire, so that the electrode wire is kept taut, preventing the electrode wire from becoming loose and the tension from becoming smaller, and improving its adjustment efficiency.

[0005] However, the tension adjustment mechanism currently in use still has certain shortcomings. The tension adjustment of the electrode wire is achieved by rotating the screw in the above document, which is not very efficient and takes a long time to rotate. In addition, the adjustment mechanism is not convenient for replacing the wire guide wheel, and the later maintenance will be more troublesome. Therefore, the existing structure needs to be improved. Utility Model Content

[0006] The purpose of this invention is to provide a tension adjustment mechanism for wire cutting machines, so as to solve the problem mentioned in the background art that it is inconvenient to adjust the tension of wire cutting machines.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a tension adjustment mechanism for a wire cutting machine, comprising a machine tool plate, wherein three wire guide rollers are connected to the side of the machine tool plate, and metal wires are connected to the surface of the wire guide rollers.

[0008] The side of the machine tool plate is provided with a through groove, and a sliding block slides inside the through groove. A connecting wheel is installed on one side of the sliding block, and a pressing block is connected to the other side of the sliding block. A sliding mechanism for adjusting the tension of the cutting machine wire is provided inside the through groove.

[0009] A threaded cylinder is fixed to the side of the sliding block near the connecting wheel, and a pressing mechanism is provided at the end of the threaded cylinder to facilitate the replacement of the connecting wheel.

[0010] Furthermore, the sliding mechanism includes a toothed block, which is fixed to the side of the machine tool plate near the pressing block, and a sliding groove is provided on the side of the machine tool plate near the toothed block.

[0011] Furthermore, a slider slides through the inside of the groove, the slider is fixed to the side of the pressing block, the pressing block has a rotating groove inside, a gear is rotatably connected inside the rotating groove, the gear is meshed with the side of the tooth block, and the gear rotates on the side of the sliding block near the pressing block.

[0012] Furthermore, a rotating groove is provided through the side of the rotating groove, and a positioning mechanism to improve the stability of the connecting wheel is provided inside the rotating groove. The positioning mechanism includes a ratchet, which is fixed to the end of the gear away from the sliding block.

[0013] Furthermore, a rotating block is rotatably connected inside the rotating groove, a torsion spring is connected between the rotating block and the rotating groove, a positioning block is fixed at the end of the rotating block, the positioning block is fitted to the side of the ratchet, and a push block is fixed on the side of the positioning block away from the rotating block, the push block slides through inside the rotating groove.

[0014] Furthermore, the extrusion mechanism includes a threaded ring, which is threadedly connected to the surface of the threaded cylinder. The end of the threaded cylinder is symmetrically provided with guide grooves, and a guide block slides through the guide groove. An extrusion block is fixed to the end of the guide block. An insert block is fixed to the side of the connecting wheel near the sliding block. The insert block is slidably connected to the threaded cylinder, and positioning grooves are symmetrically provided on both sides of the insert block.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The tension adjustment mechanism for wire cutting machine tools can drive the connecting wheel to squeeze the metal wire by pressing the pressing block. After the metal wire is squeezed, it can be tightened by the wire guide wheel. When the metal wire is tightened, the tension of the cutting machine can be adjusted. After the adjustment is completed, the ratchet is positioned by the positioning block, which improves the convenience of adjusting the tension of the metal wire.

[0017] 2. A sliding block is provided, which enables synchronous movement of the connecting wheel and the pressing block. When adjusting the tension of the yarn, it can be operated directly by pressing, which improves the efficiency of tension adjustment.

[0018] 3. It is equipped with a slider and a groove. The sliding of the slider and the groove can guide the pressing block and ensure the smooth operation of the pressing block.

[0019] 4. A positioning block is provided, which can be used to position the ratchet at any time, thereby facilitating the positioning of the connecting wheel at any time. This improves the efficiency of wire tension adjustment without affecting stability.

[0020] 5. A threaded ring is provided, which allows for the disassembly and installation of the connecting wheel by sliding along the thread of the ring. This improves the efficiency of connecting wheel replacement and thus enhances the practicality of the cutting machine tool. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall rear-view three-dimensional structure of this utility model;

[0023] Figure 3 This is an enlarged three-dimensional structural diagram of the sliding block of this utility model;

[0024] Figure 4 This is an enlarged three-dimensional structural diagram of the ratchet of this utility model;

[0025] Figure 5 This is an enlarged three-dimensional structural diagram of the positioning block of this utility model;

[0026] Figure 6 This is a three-dimensional cross-sectional view of the threaded cylinder of this utility model;

[0027] Figure 7 This utility model Figure 6 Enlarged 3D structural diagram of section A.

[0028] In the diagram: 1. Machine tool plate; 2. Wire guide wheel; 3. Metal wire; 101. Through groove; 102. Sliding block; 103. Connecting wheel; 104. Pressing block; 105. Tooth block; 106. Slide groove; 107. Slider; 108. Rotating groove; 109. Gear; 110. Ratchet; 111. Rotating groove; 112. Rotating block; 113. Positioning block; 114. Push block; 115. Threaded cylinder; 116. Threaded ring; 117. Guide groove; 118. Guide block; 119. Extrusion block; 120. Insertion block; 121. Positioning groove. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1, such as Figures 1-4 The present invention provides the following technical solution to address the problem of inconvenient tension adjustment in wire cutting machines: a sliding mechanism is disclosed.

[0031] The machine tool plate 1 includes three wire guide rollers 2 connected to its side, with metal wires 3 attached to the surface of each roller. A through groove 101 is formed through the side of the machine tool plate 1, and a sliding block 102 slides inside the through groove 101. A connecting wheel 103 is mounted on one side of the sliding block 102, and a pressing block 104 is connected to the other side of the sliding block 102. A sliding mechanism for adjusting the tension of the cutting machine wire is provided inside the through groove 101. A threaded cylinder 115 is fixed to the side of the sliding block 102 near the connecting wheel 103, and a connecting wheel 103 is provided at the end of the threaded cylinder 115. The replacement extrusion mechanism and sliding mechanism include a toothed block 105, which is fixed on the side of the machine tool plate 1 near the pressing block 104. A slide groove 106 is provided on the side of the machine tool plate 1 near the toothed block 105. A slider 107 slides through the slide groove 106. The slider 107 is fixed on the side of the pressing block 104. A rotating groove 108 is provided inside the pressing block 104. A gear 109 is rotatably connected inside the rotating groove 108. The gear 109 is meshed with the side of the toothed block 105 and rotates on the side of the sliding block 102 near the pressing block 104.

[0032] When the wire cutting machine is in use, the metal wire 3 can generate high temperature through electrical discharge, which can melt the material being processed, thereby achieving the cutting of the material. During the cutting process, the metal wire 3 can move through the wire guide wheel 2, which can improve the cutting effect. When the metal wire 3 is used for a long time, it will become loose. Pressing the pressing block 104 can drive the slider 107 and gear 109 to move. When the gear 109 moves, it can drive the sliding block 102 to move. When the slider 107 and sliding block 102 move, they can slide through the sliding groove 106 and the through groove 101 respectively. At the same time, when the gear 109 moves, it can achieve meshing rotation through the tooth block 105. When the gear 109 meshes and rotates, it can rotate through the sliding block 102 and the pressing block 104. When the pressing block 104 slides, it can drive the connecting wheel 103 to move. When the connecting wheel 103 moves, it can squeeze the metal wire 3. After being squeezed, the metal wire 3 can be tightened through the wire guide wheel 2. When the metal wire 3 is tightened, the tension of the cutting machine can be adjusted, and the adjustment efficiency is higher.

[0033] Example 2, as follows Figure 3 and Figure 5 The present invention provides the following technical solution to address the problem of inconvenient positioning and reduced wire stability during tension adjustment on a cutting machine: Based on Embodiment 1, a positioning mechanism is disclosed:

[0034] A rotating groove 111 is formed through the side of the rotating groove 108. A positioning mechanism to improve the stability of the connecting wheel 103 is installed inside the rotating groove 111. The positioning mechanism includes a ratchet 110, which is fixed to the end of the gear 109 away from the sliding block 102. A rotating block 112 is rotatably connected inside the rotating groove 111, and a torsion spring connects the rotating block 112 to the rotating groove 111. A positioning block 113 is fixed to the end of the rotating block 112 and fits against the side of the ratchet 110. A push block 114 is fixed to the side of the positioning block 113 away from the rotating block 112 and slides through the rotating groove 111. When the cutting machine adjusts the wire tension, the gear 109 can rotate inside the pressing block 104. When the gear 109 rotates, it drives the ratchet 110 to rotate. When the ratchet 110 rotates, the inclined surface of the meshing teeth can press against the side of the positioning block 113. After being pressed, the positioning block 113 can drive... Rotating block 112 and push block 114 rotate. When rotating block 112 rotates, it can rotate through rotating groove 111. When pushing block 114 rotates, it can slide through rotating groove 111. When rotating block 112 rotates, it can compress torsion spring. After positioning block 113 is compressed to a certain position, ratchet 110 can rotate synchronously with gear 109. At this time, sliding block 102 can drive connecting wheel 103 to compress metal wire 3 to adjust tension. When sliding block 102 is compressed to a specified position, torsion spring can drive rotating block 112 to reset. When rotating block 112 resets, it can drive positioning block 113 to reset. When positioning block 113 resets, it can rotate to the side of ratchet 110 for positioning. After ratchet 110 is positioned, it will drive gear 109 to be positioned. Gear 109 will be locked on the side of tooth block 105. In this way, the positioning of pressing block 104 and connecting wheel 103 is realized, which improves the convenience of adjusting tension of metal wire 3.

[0035] Example 3, as follows Figure 3 , Figure 6 and Figure 7 The present invention provides the following technical solution to address the problem that the connecting wheel 103 of the wire cutting machine is inconvenient to replace, thus affecting the machine's operating efficiency: Based on Embodiment 1, an extrusion mechanism is disclosed:

[0036] The extrusion mechanism includes a threaded ring 116, which is threadedly connected to the surface of a threaded cylinder 115. The threaded cylinder 115 has symmetrically symmetrically arranged guide grooves 117 at its ends. A guide block 118 slides through the guide groove 117, and an extrusion block 119 is fixed to the end of the guide block 118. An insert block 120 is fixed to the side of the connecting wheel 103 near the sliding block 102. The insert block 120 is slidably connected to the threaded cylinder 115, and symmetrically arranged positioning grooves 121 are provided on both sides of the insert block 120. When the connecting wheel 103 of the cutting machine tool needs to be replaced, the threaded ring 116 can be rotated to slide threadedly through the threaded cylinder 115. When the threaded ring 116 slides threadedly, the inclined surface of its inner wall loses its extrusion force on the extrusion block 119. When the threaded ring 116 rotates to a certain position, it pulls the connecting wheel 103. When the connecting wheel 103 is pulled, it can drive the insert block 120 to move. When the insert block 120 moves, it can slide inside the threaded cylinder 115. When the insert block 120 slides, it can drive the positioning groove 121 to squeeze the side wall of the extrusion block 119. When the extrusion block 119 is squeezed, it can drive the guide block 118 to slide inside the guide groove 117. After the extrusion block 119 slides to a certain position, the insert block 120 can slide out of the threaded cylinder 115. At this time, the connecting wheel 103 and the sliding block 102 can be separated and disassembled. The connecting wheel 103 can be replaced after disassembly, which further improves the ease of use of the wire cutting machine tool.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tension adjustment mechanism for a wire cutting machine, comprising a machine tool plate (1), wherein three wire guide rollers (2) are connected to the side of the machine tool plate (1), and metal wires (3) are connected to the surface of the wire guide rollers (2), characterized in that: The machine tool plate (1) has a through groove (101) through the side. A sliding block (102) slides inside the through groove (101). A connecting wheel (103) is installed on one side of the sliding block (102). A pressing block (104) is connected to the other side of the sliding block (102). A sliding mechanism for adjusting the tension of the cutting machine wire is provided inside the through groove (101). A threaded cylinder (115) is fixed on the side of the sliding block (102) near the connecting wheel (103), and the end of the threaded cylinder (115) is provided with a pressing mechanism to facilitate the replacement of the connecting wheel (103).

2. The tension adjustment mechanism for a wire cutting machine tool according to claim 1, characterized in that: The sliding mechanism includes a toothed block (105), which is fixed on the side of the machine tool plate (1) near the pressing block (104). The side of the machine tool plate (1) near the toothed block (105) is provided with a sliding groove (106).

3. The tension adjustment mechanism for a wire cutting machine tool according to claim 2, characterized in that: A slider (107) slides through the inside of the groove (106). The slider (107) is fixed to the side of the pressing block (104). A rotating groove (108) is opened inside the pressing block (104). A gear (109) is rotatably connected inside the rotating groove (108). The gear (109) is meshed with the side of the tooth block (105). The gear (109) rotates on the side of the sliding block (102) near the pressing block (104).

4. The tension adjustment mechanism for a wire cutting machine tool according to claim 3, characterized in that: The rotating groove (108) has a rotating groove (111) through the side. The rotating groove (111) is provided with a positioning mechanism to improve the stability of the connecting wheel (103). The positioning mechanism includes a ratchet (110) and the ratchet (110) is fixed at the end of the gear (109) away from the sliding block (102).

5. A tension adjustment mechanism for a wire cutting machine tool according to claim 4, characterized in that: A rotating block (112) is rotatably connected inside the rotating groove (111). A torsion spring is connected between the rotating block (112) and the rotating groove (111). A positioning block (113) is fixed at the end of the rotating block (112). The positioning block (113) is attached to the side of the ratchet (110). A push block (114) is fixed on the side of the positioning block (113) away from the rotating block (112). The push block (114) slides through inside the rotating groove (111).

6. The tension adjustment mechanism for a wire cutting machine tool according to claim 1, characterized in that: The extrusion mechanism includes a threaded ring (116), which is threadedly connected to the surface of a threaded cylinder (115). A guide groove (117) is symmetrically provided at the end of the threaded cylinder (115). A guide block (118) slides through the guide groove (117). An extrusion block (119) is fixed at the end of the guide block (118). An insert block (120) is fixed on the side of the connecting wheel (103) near the sliding block (102). The insert block (120) is slidably connected to the threaded cylinder (115), and positioning grooves (121) are symmetrically provided on both sides of the insert block (120).

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