Wire clamping device of wire cutting machine

Abstract

The invention provides a wire clamping device of a wire cutting machine, which is applied to the field of wire cutting machines, and is characterized by comprising a wire conveying pipe which slides along a linear direction and is used for conveying an electrode wire; the sliding driving device drives the wire conveying pipe to slide; the wire winding barrel is used for winding an electrode wire; the first clamping piece and the second clamping piece are used for clamping and fixing the electrode wire in a matched mode, and the first clamping piece is fixed to the wire winding barrel; the pressed part is arranged in the wire winding cylinder; the elastic piece is used for extruding the pressed piece towards the direction far away from the inner wall of the wire winding barrel; the connecting piece is connected with the pressed piece and the second clamping piece, when the elastic piece applies pressure to the pressed piece, pressure is transmitted to enable the second clamping piece to apply pressure to the first clamping piece, and the first clamping piece and the second clamping piece are extruded by the wire conveying pipe to be opened; the electrode wire has the technical effect that the fracture risk of the electrode wire can be reduced.

Description

Technical Field

[0001] The invention relates to the field of wire cutting machines, in particular to a wire clamping device of a wire cutting machine. Background Art

[0002] Wire cutting machine is a device that uses high-speed moving electrode wire to generate spark discharge between the electrode wire and the workpiece when electricity is applied to the electrode wire and the workpiece, thereby cutting the workpiece using high temperature. Currently, the commonly used electrode wires are molybdenum wire and copper wire. The copper wire is discarded after cutting, while the molybdenum wire can be recycled. Usually, the ends of the molybdenum wire are fixed on the wire winding drum, and the reciprocating movement of the molybdenum wire is used for cutting. Currently, some molybdenum wire wire cutting machines have automatic wire feeding function. After the molybdenum wire cutting machine completes one cutting, the tail end of the molybdenum wire is separated from the wire winding drum, and the molybdenum wire is re-passed through the workpiece to be processed and then the tail end of the molybdenum wire is re-fixed on the wire winding drum.

[0003] At present, wire cutting equipment with automatic wire feeding function generally has a fixed structure on the wire winding drum to fix the tail end of the molybdenum wire. When the molybdenum wire moves back and forth, part of the electrode wire will inevitably be carried on the fixed structure. When the electrode wire is wound on the wire winding drum, the circumference of the electrode wire carried on the fixed structure is different from that of the electrode wire directly wound on the wire winding drum. In actual use, the electrode wire carried on the fixed structure has a probability of slipping from the fixed structure to the wire winding drum. Since the wire winding drum rotates at a high speed during use, the slipping electrode wire will have the risk of breaking. The broken electrode wire cannot maintain tension and can no longer be used for cutting. It can only be discarded and replaced, resulting in increased processing costs and processing stagnation. Summary of the invention

[0004] The object of the present invention is to provide a wire clamping device for a wire cutting machine, which has the advantage of being able to reduce the risk of electrode wire breakage.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides the following technical solution: a wire clamping device for a wire cutting machine, comprising:

[0006] A sliding drive device carried on a wire cutting machine;

[0007] A wire conveying tube for the electrode wire to pass through and for reciprocating along the direction of the electrode wire under the drive of the sliding drive device;

[0008] A wire winding drum for winding electrode wire;

[0009] A clamping assembly carried on the outer wall of the wire winding drum, the clamping assembly comprising a first clamping piece carried on the outer wall of the wire winding drum, and a second clamping piece cooperating with the first clamping piece to clamp and fix the electrode wire, the first clamping piece and the second clamping piece being squeezed open by the wire feeding tube;

[0010] A pressure-bearing member built into the wire winding drum;

[0011] an elastic member for applying a squeezing force to the pressure-bearing member in a direction away from the inner wall of the wire winding drum; and

[0012] A connecting piece connects the pressure-bearing piece and the second clamping piece so that the extrusion force exerted on the pressure-bearing piece acts on the second clamping piece.

[0013] Through the above technical scheme, when the electrode wire is fixed on the wire winding drum, the sliding drive device drives the wire feeding tube to slide in the direction where the first clamp and the second clamp are located, and the wire feeding tube squeezes the first clamp and the second clamp to open the first clamp and the second clamp. During the opening process, the second clamp drives the pressure-bearing part to move, thereby squeezing the elastic part, and then the electrode wire enters between the first clamp and the second clamp. After the sliding drive device drives the wire feeding tube to retract, the pressure-bearing part is returned to its original position under the action of the elastic part, thereby driving the second clamp to move so that the first clamp is re-fitted with the second clamp, thereby squeezing and fixing the electrode wire. This scheme provides pressure to fix the electrode wire through the elastic part, and the force of the elastic part does not directly act on the second clamp. The structure of the first clamp and the second clamp does not affect the strength of the electrode wire fixation, so that the structure of the first clamp and the second clamp can be flexibly adjusted, so that the first clamp and the second clamp can be designed to be smaller and thinner, so that the length of one circle of the electrode wire carried on the second clamp is approximately equal to the length of one circle of the electrode wire directly wound on the wire winding drum, thereby reducing the risk of wire breakage.

[0014] In one embodiment of the present invention, the connecting member is configured as a connecting rod, which passes through the wire winding drum, the first clamp and the second clamp. One end of the connecting rod is fixedly connected to the pressure member and the other end is fixed with a clamping block, which abuts against the second clamp.

[0015] Through the above technical solution, the elastic member applies force to the first pressure-bearing member, and the first pressure-bearing member transmits the pressure to the clamping block through the connecting rod. The clamping block squeezes the second clamp toward the side where the first clamp is located, so that the first clamp cooperates with the second clamp to squeeze and fix the electrode wire.

[0016] In one embodiment of the present invention, the elastic member is configured as a spring, the spring is sleeved on the connecting member and two ends of the spring are respectively against the pressure-bearing member and the inner wall of the wire winding drum.

[0017] Through the above technical solution, the second clamp drives the pressure block to move toward the outside of the wire winding drum when it is opened. During the movement, the pressure piece and the wire winding drum compress the spring. The spring stores the pressure and drives the pressure piece back to its original position when the wire feeding tube retracts.

[0018] In one embodiment of the present invention, a surface of the second clamping piece wound around the electrode wire is configured as an arc-shaped surface.

[0019] Through the above technical solution, the electrode wire can smoothly transition from the second clamp to the wire winding drum during winding, avoiding the edge of the second clamp cutting the electrode wire and causing the electrode wire to break, further reducing the risk of wire breakage.

[0020] In one embodiment of the present invention, limiting blocks are provided on both side protrusions of one side of the second clamp abutting against the first clamp, and the limiting blocks prevent the electrode wire from escaping from both sides of the first clamp and the second clamp.

[0021] Through the above technical solution, the stability of the first clamp and the second clamp in clamping and fixing the electrode wire is enhanced.

[0022] In one embodiment of the present invention, a plurality of groups of the first clips and the second clips are evenly arranged around the circumference of the wire winding drum, and the pressure-bearing member, the elastic member and the connecting member are arranged corresponding to the first clips and the second clips.

[0023] Through the above technical scheme, the wire feeding tube slides along a linear path, and the first clamp and the second clamp can be squeezed open by the wire feeding tube only when they rotate to the position where they reach the sliding path of the wire feeding tube. Therefore, it is necessary to adjust the angle of the wire winding drum before clamping the wire. Arranging multiple groups of first clamps and second clamps can reduce the rotation angle of the wire winding drum when adjusting the wire winding drum, thereby improving the fixing efficiency. At the same time, the uniform arrangement of multiple groups of first clamps and second clamps can balance the center of gravity, so that the center of gravity of the overall structure on the wire winding drum can be located on the rotating shaft of the wire winding drum, thereby enhancing the rotation stability of the wire winding drum.

[0024] As described above, the wire clamping device of the wire cutting machine of the present invention has the following beneficial effects:

[0025] When the electrode wire is fixed on the wire winding drum, the sliding drive device drives the wire feeding tube to slide in the direction where the first clamp and the second clamp are located, and the wire feeding tube squeezes the first clamp and the second clamp to open the first clamp and the second clamp during the opening process. The second clamp drives the pressure-bearing part to move, thereby squeezing the elastic part, and then the electrode wire enters between the first clamp and the second clamp. After the sliding drive device drives the wire feeding tube to retreat, the pressure-bearing part is returned to its original position by the action of the elastic part, thereby driving the second clamp to move so that the first clamp is re-fitted with the second clamp, thereby squeezing and fixing the electrode wire. This scheme provides pressure to fix the electrode wire through the elastic part, and the force of the elastic part does not directly act on the second clamp. The structure of the first clamp and the second clamp does not affect the strength of the electrode wire fixation, so that the structure of the first clamp and the second clamp can be flexibly adjusted, so that the first clamp and the second clamp can be designed to be smaller and thinner, so that the length of one circle of the electrode wire carried on the second clamp is approximately equal to the length of one circle of the electrode wire directly wound on the wire winding drum, thereby reducing the risk of wire breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic diagram of a wire clamping device of a wire cutting machine disclosed in an embodiment of the present invention.

[0027] Figure 2 Shown is a schematic structural diagram of a wire clamping device of a wire cutting machine disclosed in an embodiment of the present invention.

[0028] Figure 3 It is an exploded schematic diagram of the first clip and the second clip and the matching structure disclosed in the embodiment of the present invention.

[0029] Description of technical feature numbers in the accompanying drawings:

[0030] 1. Wire feeding tube; 2. Sliding driving device; 3. Wire winding drum; 4. First clamping piece; 5. Second clamping piece; 6. Pressure piece; 7. Elastic piece; 8. Connecting piece; 9. Pressing block; 10. Limiting block. DETAILED DESCRIPTION

[0031] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] See also Figure 1 The present invention provides a wire clamping device for a wire cutting machine, comprising:

[0033] A wire conveying tube 1 slides in a linear direction and is used to convey an electrode wire. The wire conveying tube 1 is assembled on a wire cutting machine. In this embodiment, the length direction of the wire conveying tube 1 is arranged in a horizontal direction. The sliding direction of the wire conveying tube 1 is the same as the length direction of the wire conveying tube 1. A wire conveying channel having the same length direction as the length direction of the wire conveying tube 1 is opened in the wire conveying tube 1, and the electrode wire passes through the wire conveying channel.

[0034] See also Figure 1 , and also includes a sliding drive device 2 for driving the wire feeding tube 1 to slide. In this embodiment, the sliding drive device 2 is configured as a screw mechanism driven by a servo motor. The screw is rotatably connected to the frame of the wire cutting machine. The screw sleeve is fixed to the wire feeding tube 1 by screws. During the reciprocating sliding of the screw sleeve, the wire feeding tube 1 is driven to move, so that the wire feeding tube 1 slides back and forth in the horizontal direction.

[0035] See also Figure 1 , and also includes a wire winding drum 3 for winding the electrode wire. The wire winding drum 3 is rotatably connected to the frame of the wire cutting machine, and a servo motor for driving the wire winding drum 3 to rotate back and forth is arranged on the frame of the wire cutting machine.

[0036] See also Figure 2 and Figure 3, and also includes a clamping assembly for clamping and fixing the electrode wire, the clamping assembly includes a first clamp 4 and a second clamp 5, the first clamp 4 is fixed to the outer surface of the wire winding drum 3 by screws, and the first clamp 4 is in contact with the wire winding drum 3. The side of the first clamp 4 is set to be an arc surface with the same contour as the outer surface of the wire winding drum 3 to enhance the stability of the fixation of the first clamp 4, and the second clamp 5 is against the side of the first clamp 4 away from the wire winding drum 3.

[0037] See also Figure 2 and Figure 3 , also includes: a pressure-bearing member 6 built into the wire winding drum 3; an elastic member 7 for squeezing the pressure-bearing member 6 in a direction away from the inner wall of the wire winding drum 3, and a connecting member 8 connecting the pressure-bearing member 6 and the second clamp 5, the connecting member 8 is configured as a connecting rod with a circular cross-section, the connecting rod passes through the wall of the wire winding drum 3, the first clamp 4 and the second clamp 5, one end of the connecting rod in the wire winding drum 3 is welded and fixed to the pressure-bearing member 6, and the other end located outside the wire winding drum 3 is threadedly connected with a clamping block 9, the clamping block 9 is against the second clamp 5, in this embodiment, the elastic member 7 is configured as a spring, the spring is sleeved on the connecting rod and the two ends of the spring are respectively against the pressure-bearing member 6 and the inner wall of the wire winding drum 3, the spring is always in a compressed state, and when the elastic member 7 applies pressure to the pressure-bearing member 6, the connecting member 8 transmits pressure so that the second clamp 5 applies pressure to the first clamp 4.

[0038] In this embodiment, in order to prevent the connecting member 8 and the pressing block 9 from interfering with the wire winding, the position where the second clamping piece 5 is penetrated by the connecting member 8 is set on a side of the second clamping piece 5 close to the edge of the wire winding drum 3.

[0039] See also Figure 2 When the wire winding drum 3 rotates to a certain angle, the first clamp 4 and the second clamp 5 are located on the sliding path of the wire feeding tube 1. The wire feeding tube 1 is inserted between the first clamp 4 and the second clamp 5 during the sliding process. The first clamp 4 and the second clamp 5 are provided with inclined surfaces, so that a V-shaped opening is formed between the first clamp 4 and the second clamp 5, which is convenient for the insertion of the wire feeding tube 1. After the wire feeding tube 1 is inserted into the V-shaped opening, the second clamp 5 is slightly lifted from the first clamp 4, so that a certain angle is formed between the first clamp 4 and the second clamp 5 for the electrode wire to enter.

[0040] See also Figure 3 The second clamp 5 is provided with limiting blocks 10 on both sides of the protrusions on one side of the first clamp 4. The limiting blocks 10 prevent the electrode wire from escaping from both sides of the first clamp 4 and the second clamp 5, thereby enhancing the stability of the first clamp 4 and the second clamp 5 in clamping and fixing the electrode wire.

[0041] See also Figure 2, a plurality of first clips 4 and second clips 5 are evenly arranged around the circumference of the wire winding drum 3, and a plurality of pressure-bearing members 6, elastic members 7 and connecting members 8 are arranged corresponding to the first clips 4 and second clips 5. In the present embodiment, four groups of first clips 4 and second clips 5 are arranged, and the interval between two adjacent groups is ninety degrees. The wire feeding tube 1 slides along a linear path, and the first clips 4 and second clips 5 can be squeezed open by the wire feeding tube 1 only when they rotate to a position where they reach the sliding path of the wire feeding tube 1. Therefore, the angle of the wire winding drum 3 needs to be adjusted before clamping the wire. Arranging a plurality of first clips 4 and second clips 5 can reduce the rotation angle of the wire winding drum 3 when adjusting the wire winding drum 3, thereby improving the fixing efficiency. At the same time, the even arrangement of a plurality of first clips 4 and second clips 5 can balance the center of gravity, so that the center of gravity of the overall structure on the wire winding drum 3 can be located on the rotating shaft of the wire winding drum 3, thereby enhancing the rotation stability of the wire winding drum 3.

[0042] When the electrode wire is fixed on the wire winding drum 3, the sliding drive device 2 drives the wire feeding tube 1 to slide toward the middle position of the first clamp 4 and the second clamp 5, and the wire feeding tube 1 squeezes the first clamp 4 and the second clamp 5 to open the first clamp 4 and the second clamp 5. During the opening process, the second clamp 5 drives the pressure-bearing member 6 to move, thereby squeezing the elastic member 7, and then the electrode wire enters between the first clamp 4 and the second clamp 5. After the sliding drive device 2 drives the wire feeding tube 1 to retreat, the pressure-bearing member 6 is returned to its original position by the action of the elastic member 7, thereby driving the second clamp 5 to move so that the first clamp 4 is re-engaged with the second clamp The first clamp 4 and the second clamp 5 are fitted together, thereby squeezing and fixing the electrode wire. In this solution, the elastic member 7 provides pressure to fix the electrode wire, and the force of the elastic member 7 does not directly act on the second clamp 5. The structure of the first clamp 4 and the second clamp 5 does not affect the strength of the electrode wire fixation, so that the structure of the first clamp 4 and the second clamp 5 can be flexibly adjusted, so that the first clamp 4 and the second clamp 5 can be designed to be smaller and thinner, so that the length of one circle of the electrode wire carried on the second clamp 5 is approximately equal to the length of one circle of the electrode wire directly wound on the wire winding drum 3, thereby reducing the risk of wire breakage.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A wire clamping device for a wire cutting machine, characterized in that: include: A sliding drive device (2) carried by the wire cutting machine; A wire conveying tube (1) for the electrode wire to pass through and for reciprocating along the direction of the electrode wire under the drive of the sliding drive device (2); A wire winding drum (3) for winding an electrode wire; A clamping assembly carried on the outer wall of the wire winding drum, the clamping assembly comprising a first clamping piece (4) carried on the outer wall of the wire winding drum, and a second clamping piece (5) cooperating with the first clamping piece (4) to clamp and fix the electrode wire, the first clamping piece (4) and the second clamping piece (5) being squeezed open by the wire feeding tube (1); A pressure-bearing member (6) built into the wire winding drum (3); an elastic member (7) for applying a squeezing force to the pressure-bearing member (6) in a direction away from the inner wall of the wire winding drum (3); and A connecting piece (8) is provided for connecting the pressure-bearing piece (6) and the second clamping piece (5) so that the extrusion force exerted on the pressure-bearing piece (6) acts on the second clamping piece (5).

2. The wire clamping device for a wire cutting machine according to claim 1, characterized in that: The connecting member (8) is configured as a connecting rod, which passes through the wire winding drum (3), the first clamp (4) and the second clamp (5), one end of the connecting rod is fixedly connected to the pressure-bearing member (6), and the other end is fixed with a clamping block (9), and the clamping block (9) abuts against the second clamp (5).

3. The wire clamping device for a wire cutting machine according to claim 2, characterized in that: The elastic member (7) is configured as a spring, which is sleeved on the connecting member (8) and has two ends that respectively abut against the inner wall of the pressure-bearing member (6) and the wire winding drum (3).

4. The wire clamping device for a wire cutting machine according to claim 1, characterized in that: The surface of the second clamping piece (5) wound around the electrode wire is configured as an arc-shaped surface.

5. The wire clamping device for a wire cutting machine according to claim 1, characterized in that: Limiting blocks (10) are provided on the protrusions on both sides of a side of the second clamp (5) that is in contact with the first clamp (4), and the limiting blocks (10) limit the electrode wire from being separated from both sides of the first clamp (4) and the second clamp (5).

6. The wire clamping device for a wire cutting machine according to any one of claims 1 to 5, characterized in that: The first clamping piece (4) and the second clamping piece (5) are evenly arranged in multiple groups around the circumference of the wire winding drum (3), and the pressure-bearing piece (6), the elastic piece (7) and the connecting piece (8) are arranged corresponding to the first clamping piece (4) and the second clamping piece (5).

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